CN211526598U - Humidifying air purifier - Google Patents

Abstract

The utility model discloses a humidification air purifier, include: a case having an air supply fan; a door assembly coupled to the case in a manner of being drawn out in a direction away from the blower fan; the air filter is arranged on the door assembly; a discharge part formed at the upper part of the box body and used for discharging the air passing through the air filter; and a housing cover located between the two side surfaces of the case below the discharge portion; the housing cover includes: a guide plate surrounding the blower fan so as to guide the air from the blower fan to the discharge portion, and having a cut-off portion dividing the air into a rotational flow discharged from the blower fan and an ascending flow toward the discharge portion; and an extension plate extending from one side of the guide plate to one side surface of the case to restrict the lateral flow of the air discharged from the discharge portion. According to the utility model discloses, can provide the flow of the process purification or the spit air of humidification that is fit for indoor environment.

Description

Humidifying air purifier

The application is a divisional application taking an application with the application number of 201920083368.7 and the application date of 2019, 1 and 17 as a parent.

Technical Field

The utility model relates to a humidification air purifier that can carry out air purification and air humidifying.

Background

An air purifier is understood to be a device that sucks in polluted air and purifies it, and then discharges the purified air. As an example, the air purifier may include: an air supply device for making the external air flow into the air purifier; and a filter capable of filtering dust, bacteria, or the like in the air.

A humidifier is understood as a device that sucks in air, humidifies it, and then discharges it in order to supply moisture to the air. Conventional humidifiers are classified into a vibration type in which water is atomized by a vibrating plate and discharged into the air, and a natural evaporation type in which water is naturally evaporated by a humidifying filter. The natural evaporation type is divided into a rotating disk type which rotates a rotating disk using a driving force, water is naturally evaporated on the surface of the rotating disk in air, and a humidification filter type which naturally evaporates a wetted humidification medium using flowing air.

Recently, a humidifying air purifier having an additional humidifying function in the air purifier is being developed. In the humidified air purifying apparatus disclosed in the related art document JP2011-226670a (disclosed in 2011.11.10), a suction port through which air is sucked is provided between the main body and the front plate, and a discharge port through which humidified air is discharged is provided on the upper surface of the main body.

However, the humidified air purifying apparatus disclosed in conventional document JP 2011-.

The suction ports are formed at upper, lower, left, and right edges of the front plate, so that air sucked in from different directions obstruct each other, and the flow of air sucked into the main body is somewhat unsmooth.

In addition, the suction port may affect the external appearance of the humidified air cleaning apparatus.

Further, since there is no structure for guiding the air blown by the air blowing device to the upper side, only a part of the air blown by the air blowing device is discharged to the upper discharge port, and the other part is accumulated in the main body, thereby possibly lowering the efficiency.

Further, since the discharge port is open during operation of the humidified air purification apparatus, large foreign matter may enter the discharge port. In addition, if the body of the user enters, there is a risk of injury due to the rotating air supply device.

Further, although the discharge port is provided with a blade (vane) for adjusting the discharge angle of the humidified air, when the blade is turned backward, the wall located behind the humidified air purification device may be wetted by the humidified air discharged to the discharge port, and mold or the like may be generated.

In addition, when the humidified-air purifying apparatus is placed beside the bed, the humidified air at the discharge port is discharged directly toward the face or head of the user, thereby possibly giving the user an unpleasant feeling.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a humidification air purifier provides the flow of the process purification or the spit air of humidification that is fit for indoor environment.

Another object of the present invention is to provide a humidification air purifier, which can reduce the noise caused by the driving of the air supply fan.

It is still another object of the present invention to provide a humidifying air purifier, which can effectively reduce the noise generated by the air flow.

Another object of the utility model is to provide a humidification air purifier can provide comfortable user sleep environment.

It is another object of the present invention to provide a humidifying air purifier, which is provided with a housing structure capable of effectively performing the functions of a plurality of sensors in pneumatics.

In order to achieve the above object, the utility model provides a humidification air purifier, wherein, include: a case having an air supply fan; a door assembly coupled to the cabinet in a manner of being drawn out from a direction in which the blower fan is spaced apart from the cabinet; an air filter disposed at the door assembly; a discharge unit formed at an upper portion of the case and discharging the air passing through the air filter; and a housing cover located between both side surfaces of the case below the discharge portion; the housing cover includes: a guide plate surrounding the blower fan so as to guide the air from the blower fan to the discharge portion, and having a cut-off portion formed therein for dividing the air into a rotational flow discharged from the blower fan and an upward flow toward the discharge portion; and an extension plate extending from one side of the guide plate to one side surface of the case to restrict a lateral flow of the air discharged from the discharge portion.

Preferably, the extension plate extends from a side of the guide plate forming the cut part to a side surface of the case by a minimum distance.

Preferably, the extension plate extends horizontally toward one side of the case.

Preferably, the door assembly further includes a humidifying filter provided in the door assembly, and the air discharged from the discharge portion is air passing through the air filter and the humidifying filter.

Preferably, a horizontal distance between one side of the guide plate and one side surface of the case is greater than a horizontal distance between the other side of the guide plate and the other side surface of the case.

Preferably, the guide plate includes a discharge guide plate extending obliquely from the cut-off portion toward the discharge portion, and an angle between the discharge guide plate and the extension plate is an obtuse angle.

Preferably, the discharge guide plate is formed with: the angle of inclination from the cut portion to one side surface of the case is increased as the extension length of the extension plate is increased.

Preferably, the casing cover further includes a cover plate located behind the blower fan and defining a discharge flow path together with the guide plate, and the extension plate extends perpendicular to the cover plate.

Preferably, the guide plate includes: a first guide member extending in an arc shape so as to surround a part of the outer periphery of the blower fan; a second guide extending upward from one end of the first guide toward the discharge portion; and a third guide extending from the other end of the first guide toward the discharge portion, an upper end of the third guide being connected to the extension plate.

Preferably, a plurality of panels are included, the plurality of panels being joined to form a unitary appearance, at least one of the plurality of panels being formed of wood.

In addition, in order to achieve the above object, the humidifying air purifier of the first aspect of the present invention may include:

a box body including a pair of side panels, an upper side panel and a rear side panel respectively connecting the pair of side panels at an upper side and a rear side;

a door assembly coupled to the cabinet and capable of being drawn out in front of the cabinet;

the suction inlet is formed on the door assembly, is communicated with the inner part of the box body and is used for air to flow in;

a discharge part located at the rear side of the upper panel for discharging air; and

and a discharge grill provided with a plurality of grill guides extending obliquely forward toward the upper end, and covering the upper side of the discharge portion.

The humidifying air purifier of the second aspect is based on the first aspect,

the plurality of grid guides are arranged to be spaced apart from each other in the front-rear direction.

The humidifying air purifier of the third aspect is based on the first aspect,

the rear side panel forms an upper side surface extending forward,

the discharge portion has an opening that is opened in the vertical direction formed on the upper surface of the rear panel.

The humidifying air purifier of the fourth aspect is based on the first aspect,

the upper side of the rear side panel further comprises a grid placing groove for placing the spitting grid on the upper end of the grid guide piece and the upper end of the upper side panel at the same height.

The humidifying air purifier of the fifth aspect is based on the first aspect,

the plurality of grid guides are elongated at the same angle to each other

The humidifying air purifier of the sixth aspect is based on the first aspect,

further comprising:

and a housing cover disposed inside the case and having an outer circumferential surface surrounding the air supply fan.

A humidified air purifier of a seventh aspect on the basis of the sixth aspect,

the outer circumferential surface of the housing cover includes:

a guide plate extending so as to guide the air passing through the blower fan upward in a radial direction; and

and an extension plate extending laterally from an end of the guide plate along an upper end of the case cover.

The humidifying air purifier of the eighth aspect is based on the seventh aspect,

a stepped rib for supporting the discharge grill is formed on the extension plate.

The humidified air purifier of ninth aspect on the seventh aspect,

the discharge portion communicates with a discharge flow path formed by the guide plate.

The humidifying air purifier of the tenth aspect is based on the sixth aspect,

the blower fan includes an impeller for sucking and discharging air,

the blade of the impeller includes:

a maximum arc height point defined as a point of the negative pressure surface corresponding to a point on the mean camber line having the maximum arc height; and

a reference point defined as a point at which a distance between the suction surface and the pressure surface of the suction surface is maximum,

the negative pressure surface includes a linear surface formed of a flat surface from the maximum camber point to the leading edge.

The humidifying air purifier of the eleventh aspect is based on the seventh aspect,

the housing cover further comprises a sensor holder in which a plurality of sensor devices are arranged,

the sensor holder is located in a recessed space formed by an outer circumferential surface of the housing cover.

The humidifying air purifier of the twelfth aspect may comprise:

a box body including a pair of side panels, an upper side panel and a rear side panel respectively connecting the pair of side panels at an upper side and a rear side;

a door assembly capable of being drawn out of the cabinet;

an opening part arranged at the upper part of the box body and positioned at the rear side of the upper side panel; and

a scroll casing disposed below the opening part and provided with an air blowing fan,

the volute housing includes:

a first guide member formed in an arc shape and surrounding a part of an outer circumference of the blower fan;

a second guide located at a position close to one of the pair of side panels and extending upward from one end of the first guide; and

a third guide plate located at a position close to the other of the pair of side plates and extending upward from the other end of the first guide,

a distance between an upper end of the third guide and the other side panel is greater than a distance between an upper end of the second guide and the one side panel.

The humidifying air purifier of the thirteenth aspect is based on the twelfth aspect,

the third guide member extends obliquely in a direction away from the second guide member toward the upper portion.

A humidifying air purifier of a fourteenth aspect is based on the twelfth aspect,

an upper end of the third guide overlaps the first guide when viewed from below.

The humidifying air purifier of the fifteenth aspect is based on the twelfth aspect,

the scroll case further includes an extension plate extending from an upper end of the third guide toward the other side panel.

In order to achieve the above object, the humidifying air purifier of the present embodiment may include a discharge grill having a plurality of grill guides formed to be inclined in a direction that is more forward than upward, and covering the discharge portion from above.

Therefore, the air discharged from the discharge portion is guided to the front upper side by the plurality of grill guides, and thereby, the wall located behind the humidifying air purifier can be prevented from being affected with moisture. In addition, foreign matter of a predetermined size or more can be prevented from flowing into the discharge portion.

In addition, a recess is provided between the base and the lower end of the door assembly, and the suction port is located at an upper side of the recess and may be formed at a bottom surface of the door assembly.

Therefore, the user cannot see the suction port, and thus, the appearance of the humidifying air purifier can be improved. In addition, the indoor air can be smoothly sucked into the case through the recess and the suction port.

In detail, the humidifying air purifier of the present embodiment may include a case including a base, a pair of side panels provided at both sides of the base, and an upper side panel and a rear side panel respectively connecting the pair of side panels at an upper side and a rear side.

In addition, the humidifying air purifier of the present embodiment may further include a door assembly that is coupled to the case in a front of the case so as to be drawable and is disposed to be spaced upward with respect to the base.

In addition, the humidifying air purifier of the present embodiment may further include a recess portion, which is defined as a space recessed rearward, between the lower end of the door assembly and the base.

In addition, the humidifying air purifier of the present embodiment may further include a suction inlet formed at a bottom surface of the door assembly at an upper side of the recess part to allow air to flow therein. The suction port may communicate with the inside of the case.

In addition, an air filter and a humidification filter may be provided at the door assembly.

Also, an interval L1 between the air filter and the humidification filter may be greater than an interval L2 between the humidification filter and the blower fan.

In addition, a height H1 from the door bottom portion of the door assembly to the upper end of the air filter may be formed to be higher than a height H2 from the door bottom portion to the upper end of the humidification filter.

In addition, the humidifying filter may be configured to be lower than the air filter in height.

In addition, a height T1 from the door bottom portion to the lower end of the air filter may be formed to be higher than a height T2 from the door bottom portion to the lower end of the humidification filter.

In addition, the humidifying air purifier of the present embodiment may further include a discharge unit located at a rear side of the upper panel and discharging the air having passed through the humidifying filter.

In addition, the humidifying air purifier of the present embodiment may further include a discharge grill provided with a plurality of grill guides extending obliquely forward toward the upper end thereof, covering the upper side of the discharge portion.

The plurality of the grill guides may be spaced apart from each other in the front-rear direction and maintain a predetermined angle with respect to an imaginary vertical line.

Therefore, the air can be constantly discharged to the front upper side, and the wall located behind the humidifying air purifier can be prevented from being wetted.

Further, an upper portion of the rear panel may be bent to form an upper side surface extending forward. The discharge portion may have an opening that is opened in the vertical direction on an upper surface of the rear panel.

Therefore, the discharge portion is located behind the upper panel, and the upper surface portion of the rear panel can be easily connected to the upper panel.

In addition, a grill mounting groove for mounting the discharge grill may be formed on an upper side surface of the rear panel. The spitting grill can be stably installed in the grill installation groove.

In addition, the humidifying air purifier may further include a case cover disposed inside the case and formed with an Outer circumferential surface (Outer circumferential surface) surrounding the air supply fan.

The outer circumferential surface of the housing cover may include: a guide plate extending to guide the air passing through the air supply fan upward from a radial direction; and an extension plate extending laterally from an end of the guide plate along an upper end of the case cover.

Further, a stepped rib for supporting the discharge grill may be formed on the extension plate.

The discharge portion may communicate with a discharge flow path formed by the guide plate.

In addition, the blower fan may include an impeller for sucking and discharging air.

The blades of the impeller) may include: a maximum arc height point defined as a point of the negative pressure surface corresponding to a point having a maximum arc on the mean camber line; and a reference point defined as another point of the negative pressure surface where a distance between the negative pressure surface and the pressure surface is maximum.

The negative pressure surface may include a linear surface formed as a flat surface from the maximum camber point to the leading edge.

The linear surface may include: a first linear surface between the reference point and the leading edge; and a second linear surface located between the reference point and the maximum arc height point.

An angle between the first linear surface and the second linear surface may be an obtuse angle.

The distance DL between the leading edge and the reference point may be 0.21 to 0.27 times the chord length CL.

According to the blade structure of the impeller, when the air supply fan is driven, the flow noise can be reduced.

In addition, the housing cover may further include a sensor holder in which a plurality of sensor devices are disposed. The sensor holder may be located in a recess space formed at an outer circumferential surface of the housing cover.

Thereby, the influence of the air flow on the plurality of sensors can be minimized.

The plurality of sensor devices may include at least one of a dust sensor, a gas sensor, and a humidity sensor.

In addition, the housing cover may include: a guide plate extending obliquely upward from the cut-off part; and an extension plate extending from the guide plate along an upper end of the housing cover.

Wherein the guide plate and the extension plate may be formed with a depression space in which the sensor holder is installed.

In addition, the inner surface of the cut portion may be formed as a curved surface in which a concave surface and a convex surface are repeatedly provided.

In addition, the humidifying air purifier of the present embodiment may be formed with an open portion including a discharge portion at an upper portion of the case.

A volute casing can be arranged in the box body, and the volute casing is provided with an air supply fan.

The scroll case may be located at a lower side of the open part.

Therefore, the humidified air blown by the blower fan can flow to the opening portion by minimizing flow loss by the scroll case. That is, the efficiency of the blower fan can be improved.

In addition, the second guide may be formed to be long in the vertical direction, and the third guide may be formed to be inclined in a direction away from the third guide as it goes upward.

And, a shortest distance between the upper end of the third guide and the side panel of one side of the case may be farther than a shortest distance between the upper end of the second guide and the side panel of the other side of the case.

Therefore, the inclination of the third guide can be made more vertical than horizontal, and the air flow guided by the third guide can be prevented from being discharged approximately horizontally with respect to the left-right direction.

In detail, the humidifying air purifier of the present embodiment may include: a pair of side panels provided at both sides; and a box body including an upper side panel and a rear side panel connecting the pair of side panels at an upper side and a rear side, respectively.

In addition, the humidifying air purifier of the present embodiment may further include an open part formed at an upper part of the case.

The humidifying air purifier of the present embodiment may further include a scroll case, which is disposed from the inside of the case to the lower side of the opening portion, and which is provided with a blower fan.

The scroll case may include a first guide formed in an arc shape surrounding a portion of an outer circumference of the blower fan.

The scroll case may further include a second guide located near one of the pair of side plates and extending upward from one end of the first guide.

The scroll case may further include a third guide located adjacent to the other of the pair of side plates and extending upward from the other end of the first guide.

The third guide may extend obliquely in a direction in which the third guide is spaced apart from the second guide as it goes upward from a cut portion formed in a portion connected to the first guide.

A distance between the upper end of the third guide and the other side panel may be greater than a distance between the upper end of the second guide and the one side panel.

In addition, an upper end of the third guide may be located at a position overlapping (overlap) with the first guide when viewed from below.

Thus, the inclination of the third guide may be more approximate to vertical than horizontal. This prevents the lateral component in the air flow guided by the third guide from being discharged in a nearly horizontal manner when the lateral component passes through the discharge portion.

The upper portion of the rear panel may be bent forward to form an upper side surface. The opening portion may be defined as an opening that is opened in the vertical direction on the upper surface of the rear panel.

In addition, the scroll case may further include an extension plate horizontally extending from an upper end of the third guide to the other side panel.

In addition, the opening part may include: a discharge portion communicating downward with a space between the second guide and the third guide; and a non-discharge portion facing the extension plate downward.

Wherein an area of the discharge portion may be wider than an area of the non-discharge portion.

In addition, a plurality of grill guides may be provided in the opening portion so as to extend obliquely forward toward the upper portion.

In addition, the opening portion may be provided with a discharge grill covering an upper side of the opening portion.

In addition, the plurality of grill guides may be disposed to be spaced apart from each other in the front-rear direction. Also, the extending direction of the grill guide may be maintained at a predetermined angle with respect to an imaginary vertical line.

In addition, a part of the discharge grill may cover the discharge portion, and another part may cover the non-discharge portion.

In addition, a stepped rib supporting the discharge grill may be formed on the extension plate.

Further, the humidifying air purifier of the present embodiment may include a scroll case extending from an upper end of the third guide in a direction away from the second guide, and provided with an extension plate at a lower side of the open portion.

The third guide may extend obliquely, nearly vertically. Therefore, the air flow guided by the third guide can reduce the flow component discharged to the side.

In detail, the humidifying air purifier of the present embodiment may include: a case having an open portion formed at an upper portion thereof; and a scroll casing disposed below the opening portion in the case, and provided with an air blowing fan inside. The scroll casing may include: a first guide member formed in an arc shape and surrounding a part of an outer circumference of the blower fan; a second guide extending from one end portion of the first guide toward the open portion; a third guide extending from a cut portion formed at the other end portion of the first guide to the open portion, the third guide being inclined in a direction away from the second guide as the third guide approaches the open portion; and an extension plate horizontally extending from an upper end of the third guide in a direction away from the second guide and located at a lower side of the open portion.

In addition, the humidifying air purifier may further include a discharge grill provided with a plurality of grill guides formed obliquely such that upper ends thereof are inclined forward and the grill guides cover the opening portion from an upper side.

A connection portion (edge) of the third guide and the extension plate may be downwardly disposed to overlap the first guide.

In another aspect, the present invention provides a humidifying air purifier that can provide a structure for reducing internal noise.

Such a humidifying air purifier may include: a door assembly coupled to the case to be drawable therefrom; a fan cover coupled to the case and coupled with a fan motor; and a housing cover coupled to a rear side of the fan housing and accommodating the blower fan coupled to the fan motor.

And, the housing cover may include: a cover plate arranged on one side of the rear; and a guide plate extending forward along a side end of the cover plate and defining a discharge flow path through which air flows by the blower fan.

And, the guide panel may include: and a first guide extending along a rotation direction of the air supply fan to increase a distance between the first guide and the air supply fan.

In addition, the guide panel may further include: a second guide extending upward from the first guide; and a third guide located on the opposite surface of the second guide and extending obliquely upward from the first guide.

In addition, the guide plate may include a cut portion located between the first guide and the third guide, and the cut portion may be formed to protrude toward the discharge flow path.

The minimum distance G between the cutting section and the impeller of the blower fan may be set to be 8% to 10% of the diameter G of the impeller.

The cut portion may be formed in an arc shape with respect to a first direction defined as a direction connecting the first guide and the third guide, and at least a part of the cut portion may be formed in an arc shape with respect to a second direction defined as a direction connecting a front end and a rear end of the cut portion.

Further, the discharge flow path may include: a first discharge flow path formed along the first guide; and a second discharge flow path formed between the second guide and the third guide.

According to the above-described configuration, it is possible to reduce noise generated when a part of the air flowing from the first discharge flow path to the second discharge flow path collides with the end of the cut-off portion.

Foretell the utility model discloses humidification air purifier has as follows the effect.

First, the humidified air discharged from the discharge portion can be discharged to the front upper side by the discharge grill. This prevents the wall behind the humidifying air purifier from becoming wet, thereby preventing mold and the like from being generated on the wall due to moisture.

Further, the plurality of grill guides of the discharge grill are spaced apart from each other in the front-rear direction and are held at a predetermined angle with respect to the virtual vertical line, whereby the humidified air discharged from the discharge port can be always kept discharged upward and forward. In addition, foreign matter having a predetermined size or more or the body of the user can be prevented from entering the discharge port.

In addition, the extension plate is formed to extend horizontally at the upper end portion of the third guide, whereby the inclination of the third guide can be formed more steeply than in the case where the extension plate is not formed. Thus, the air guided by the third guide formed obliquely to the left and right can be discharged almost perpendicularly to the left and right direction to form the scroll-shaped flow path. Therefore, when the humidified air purifier is used by being placed beside a bed, the humidified air discharged from the discharge portion is not directly blown to the head or face of the user, and there is an advantage that the user does not feel uncomfortable.

In addition, a horizontal distance between the upper end of the third guide member and the side panel adjacent thereto may be longer than a horizontal distance between the upper end of the second guide member and the side panel adjacent thereto. This ensures a space for providing the extension plate between the pair of side plates.

In addition, an upper end portion of the third guide may overlap the first guide in a vertical direction. Thereby, the extension plate extending from the upper end portion of the third guide can be formed sufficiently long as compared with a case where the upper end portion of the third guide is formed further outside the first guide.

The opening portion may include not only a discharge portion that faces the inside of the scroll case in the vertical direction but also a non-discharge portion that faces the extension plate in the vertical direction. Accordingly, the open portion is formed not to be biased to one side with respect to the left-right direction, and therefore, the appearance of the humidifying air cleaner can be improved.

The humidified air can be dispersed and flowed from the discharge port of the scroll casing to the discharge portion. Therefore, compared to the case where the opening portion is constituted only by the discharge portion facing the inside of the scroll casing in the vertical direction, there is an advantage that part of the humidified air is not blocked and can be smoothly discharged through the opening portion.

In addition, the area of the discharge portion can be larger than the area of the non-discharge portion. This makes it possible to smoothly discharge the humidified air.

In addition, a part of the discharge grill may cover the discharge portion, and another part may cover the non-discharge portion. Accordingly, the discharge grill covers the non-discharge portion as well, and therefore, the appearance of the humidifying air cleaner can be improved.

In addition, the stepped ribs for supporting the discharge grill are formed in the extension plate, so that the discharge grill can be more stably supported.

Drawings

Fig. 1 is a perspective view showing the structure of a humidifying air purifier according to an embodiment of the present invention.

Fig. 2 is a view showing a state in which a door of the humidifying air purifier according to the embodiment of the present invention is opened.

Fig. 3 is an exploded perspective view showing the structure of the humidifying air purifier according to the embodiment of the present invention.

Fig. 4 is an exploded perspective view showing a part of the structure of the humidifying air purifier according to the embodiment of the present invention.

Fig. 5 is a view showing a bottom surface structure of a water tank according to an embodiment of the present invention.

Fig. 6 is a sectional view taken along line VI-VI' of fig. 1.

Fig. 7 is a diagram showing a state in which the air cleaner and the water tank according to the embodiment of the present invention are disposed in the door.

Fig. 8 is a diagram showing a state where the filter disposed in the door is separated according to the embodiment of the present invention.

Fig. 9 is a perspective view of a door assembly of an embodiment of the present invention.

Fig. 10 is a top view of a door assembly of an embodiment of the present invention.

Fig. 11 is a diagram showing the inside of the case according to the embodiment of the present invention.

Fig. 12 is an exploded perspective view showing a housing assembly and its peripheral structure according to an embodiment of the present invention.

Fig. 13 is a rear perspective view of the fan cover according to the embodiment of the present invention.

Fig. 14 is an exploded perspective view of the blower fan and the housing cover according to the embodiment of the present invention.

Fig. 15 is an enlarged view showing a of fig. 14.

Fig. 16 is a view showing a part of the structure of the housing cover according to the embodiment of the present invention.

Fig. 17A and 17B are experimental diagrams showing a comparison of the flow of the discharged air according to the presence or absence of the extension plate of the humidified air purifier according to the embodiment of the present invention.

Fig. 18 is a perspective view of an impeller according to an embodiment of the present invention.

Fig. 19 is a view showing a blade shape of an impeller according to an embodiment of the present invention.

Fig. 20A is a diagram showing a conventional impeller blade shape as a comparative example.

Fig. 20B is a diagram showing the shape of a blade according to an embodiment of the present invention.

Fig. 21 is a diagram showing changes in the air volume and noise between the conventional impeller and the impeller according to the embodiment of the present invention.

Fig. 22 is a diagram showing the relationship between the respective air volumes and the noise at the set angle TH of the blade according to the embodiment of the present invention.

Fig. 23 is a diagram showing the relationship between the respective air volumes and the noise at the set length DL of the blade according to the embodiment of the present invention.

Fig. 24 is a perspective view showing a rear structure of the housing cover according to the embodiment of the present invention.

Fig. 25 is a diagram illustrating a sensor mounted to a housing cover according to an embodiment of the present invention.

Fig. 26 is a diagram showing the structure of a dust sensor according to an embodiment of the present invention.

Fig. 27 is a front perspective view of a rear panel according to an embodiment of the present invention.

Fig. 28 is a rear perspective view of a rear panel according to an embodiment of the present invention.

Fig. 29 is a view showing a state where the discharge grill is removed from the upper side surface portion of the rear panel according to the embodiment of the present invention.

Fig. 30 is an enlarged view showing a part of the structure of the rear panel according to the embodiment of the present invention.

Fig. 31A and 31B are experimental diagrams comparing and showing the flow of the discharge air, in which the grill guide of the discharge grill according to the embodiment of the present invention is inclined.

Fig. 32 is a sectional view showing the flow of air in the humidified air purifier according to the embodiment of the present invention.

Fig. 33 is a schematic diagram showing a part of the structure of the humidifying air purifier according to the embodiment of the present invention.

Fig. 34 is a schematic diagram showing the flow of air in the humidified air purifier according to the embodiment of the present invention.

Fig. 35 is a front view showing a housing cover according to another embodiment of the present invention.

Fig. 36 is an enlarged view of a cut-off portion of the case cover shown in fig. 35.

Fig. 37A is a perspective view of a case cover appearing as a comparative example.

Fig. 37B is a perspective view showing a housing cover according to another embodiment of the present invention.

Fig. 38A is a diagram illustrating a profile of a cut portion of a conventional case cover as a comparative example.

Fig. 38B is a view showing a cut-off portion profile of a case cover according to another embodiment of the present invention.

Fig. 39 is a diagram showing changes in the air volume and noise of the blower fan provided in the conventional casing cover and the blower fan provided in the casing cover according to another embodiment of the present invention.

Fig. 40A is a diagram showing a change in noise at an operating frequency of a blower fan provided in a conventional casing cover as a comparative example.

Fig. 40B is a graph showing a change in noise at the operating frequency of the blower fan provided in the casing cover according to another embodiment of the present invention.

Fig. 41A is a diagram illustrating a profile of a cut portion of a case cover, which is presented as a comparative example.

Fig. 41B to 41D are views showing a profile of a cut-off portion of a case cover according to a position of an inflection point according to another embodiment of the present invention.

Fig. 42 is a diagram showing changes in the air volume and noise of the blower fan provided in each of the case covers shown in fig. 41A to 41D.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail, examples of which will be illustrated in the accompanying drawings.

In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific preferred embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that other embodiments may be utilized and that logical structural, mechanical, electrical, and chemical changes may be made without departing from the spirit or scope of the present invention. The description omits certain information known to those skilled in the art in order to avoid obscuring the present invention in detail that is necessary to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

In addition, in the embodiments, terms such as first, second, A, B, (a), (b), and the like are used when describing the components of the present invention. Each of these terms does not define the nature, order, or sequence of the corresponding components, but is used merely to distinguish the corresponding components from other components.

Fig. 1 is a perspective view showing the structure of a humidifying air purifier according to an embodiment of the present invention, and fig. 2 is a view showing a state in which a door of the humidifying air purifier according to an embodiment of the present invention is opened.

Referring to fig. 1 and 2, a humidifying air purifier 10 according to an embodiment of the present invention includes: a case 100 forming an external appearance; and a door assembly 200 drawably coupled to the case 100.

The case 100 includes a plate assembly composed of a plurality of plates.

In detail, the plurality of plates includes: a lower base 101; two side panels 103 provided on both sides of the lower base 101 and extending upward; an upper panel 105 coupled to an upper side of the side panels 103 on both sides; and a rear panel 107 coupled to a rear side of the side panel 103.

The box 100 may be formed in a rectangular parallelepiped shape with an open front side by the base 101, the two side panels 103, the upper side panel 105, and the rear side panel 107.

The plurality of panels may be constructed of wood. Therefore, the humidifying air purifier 10 may bring the beauty of furniture in appearance. I.e., the appearance is beautiful.

An air filter assembly 280, a humidification filter assembly 300, a blower fan 480 (see fig. 6), and the like may be provided in the internal space of the case 100.

The air filter assembly 280 and the humidification filter assembly 300 are collectively referred to as a "filter assembly".

The door assembly 200 may be configured to be drawn out to the front of the cabinet 100 to open the cabinet, or drawn in to the rear to close the cabinet. The door assembly 200 includes a door panel 210 constituting a front side portion of the humidifying air purifier 10. The door panel 210 may be referred to as a "front panel".

The door panel 210 may have a rectangular plate shape. In a state where the door assembly 200 is closed, the door panel 210 forms a front side appearance of the humidifying air purifier 10. In addition, the door panel 210 is made of wood, so that the aesthetic sense of furniture can be felt.

A recess 30 depressed rearward may be formed between the lower end of the door panel 210 and the base 101.

An intake port 225 for taking air into the case 100 may be formed above the recess 30.

A discharge portion 109 for discharging filtered and humidified air is formed on the upper side plate 105 of the casing 100. The discharge unit 109 may be located at the rear upper portion of the humidified air purifier 10.

The door assembly 200 further includes a drawer 220(drawer) extending rearward from the rear side of the door panel 210.

The components of the humidifying air purifier 10 are provided in the drawer 220. The components may include an air filter assembly 280 and a humidifying device. The humidifying device may include a humidifying filter assembly 300, a water tank 260, and a water tank 270.

When the door assembly 200 is drawn out forward and opened, the air filter assembly 280, the humidification filter assembly 300, and the water tank 270 disposed in the drawer 220 can be drawn out forward together. Accordingly, the user can easily access the air filter assembly 280, the humidification filter assembly 300, and the water tank 270.

The drawer 220 may be coupled to the cabinet 100 to be drawn out or introduced. Therefore, the drawer 220 may be referred to as a "door" or an "accommodating portion".

The door assembly 200 further includes a guide rail guide 230 guiding the drawing or drawing of the door assembly 200. The rail guides 230 may be coupled to both sides of the lower portion of the drawer 220, respectively.

Fig. 3 is an exploded perspective view showing a structure of a humidifying air purifier according to an embodiment of the present invention, fig. 4 is an exploded perspective view showing a part of a structure of a humidifying air purifier according to an embodiment of the present invention, fig. 5 is a view showing a bottom surface structure of a water tank according to an embodiment of the present invention, and fig. 6 is a cross-sectional view taken along line VI-VI' of fig. 1.

Referring to fig. 3 to 6, a humidifying air purifier 10 according to an embodiment of the present invention includes: an air filter assembly 280 for filtering air; a humidifying filter assembly 300 for humidifying air; and a blower fan 480 generating air flow. The blower fan 480 is combined with a fan motor 483.

In detail, the case 100 includes a main body frame 110 forming a space 112 in which components of the air cleaner are disposed.

The main body frame 110 may be formed in a hexahedral shape having a front side, a rear side, and an upper side opened. In detail, the front side of the body frame 110 is opened, and the opened front side can be shielded by the door assembly 200. In addition, the rear side of the main body frame 110 is opened, and the opened rear side can be shielded by the fan cover 410 and the case cover 430. In addition, the upper side of the main body frame 110 is opened, and the opened upper side can be shielded by the electrical installation part 450.

The two side panels 103 are coupled to both sides of the main body frame 110. The upper panel 105 may be coupled to the upper side of the electrical component 450, and the rear panel 107 may be coupled to the rear side of the housing cover 430.

The door assembly 200 includes: a door panel 210 forming a front side appearance; and a drawer 220 extending rearward of the door panel 210.

The drawer 220 includes a door front side part 221 coupled to a rear surface of the door panel 210. The door panel 210 and the door front side surface part 221 are collectively referred to as a "door front side surface part".

The drawer 220 includes: a door side surface portion 222 extending rearward from both sides of the door front side surface portion 221; a door bottom surface portion 224 provided below the door side surface portion 222; and a door rear side portion 223 (see fig. 7) extending upward from the rear side of the door bottom portion 224. An installation space in which the water tub 260, the water tank 270, the air filter assembly 280, and the humidification filter assembly 300 are disposed inside the drawer 220 may be defined by the door front side 221, the door bottom 224, the door side 222, and the door rear side 223.

An air filter assembly 280 may be provided at a front portion of the drawer 220. The air filter assembly 280 may include an air filter case 281 and an air filter 285 coupled to the air filter case 281. The air filter assembly 280 may be arranged to be lifted upward and separated.

A water tank 270 may be disposed at a substantially central portion of the drawer 220, i.e., at a rear side of the air cleaner assembly 280, with respect to the front-rear direction.

The water tank 270 may be disposed inside the water tank 260. The water tank 270 may be configured to be separated by being lifted upward, and a user may replenish water or clean the water tank 270 by separating the water tank 270.

A valve hole 275a for discharging water is formed in the bottom surface 275 of the water tank 270, and a float device 276 for selectively opening and closing the valve hole 275a may be provided in the valve hole 275 a. The valve hole 275a is opened when the float device 276 is placed on a valve support portion (not shown) provided in the water tank 260, and the valve hole 275a is closed when the float device 276 is separated from the valve support portion.

The water tub 260 may have a substantially hexahedral shape with an upper portion opened. The lower portion of the water tank 260 includes a tank supporting portion 261 for supporting the water tank 270. The tank supporting part 261 forms a flat surface.

The water tank 260 further includes a floating receiving portion 262, and the floating receiving portion 262 protrudes downward from the tank supporting portion 261 and has a space in which a floating device 276 is provided. The floating receiving portion 262 has a hollow shape with a hollow interior, and may be located at a substantially central portion of the tank supporting portion 261, for example.

The floating receiving portion 262 forms a first water storage portion 262a for storing water, and the floating device 276 may be provided to be movable in the vertical direction according to a change in the water level stored in the first water storage portion 262 a. When the water level of the first water storage part 262a is equal to or higher than the set water level, the float device 276 moves upward to close the valve hole 275a of the water tank 270.

A second water storage part 229 may be formed inside the water tank 260, and the second water storage part 229 may extend rearward from the floating storage part 262 to store water. The second water storage part 229 communicates with the first water storage part 262a, and can form the same water level as the first water storage part 262 a.

The humidifying filter assembly 300 may be provided at the second water storage part 229. The humidifying filter assembly 300 may be received in a rear portion of the inner space of the drawer 220. The humidifying filter assembly 300 may be disposed at a rear side of the water tank 270.

A lower portion of the humidification filter 330 included in the humidification filter assembly 300 may be configured to be submerged into the second water reservoir 229.

The humidifying filter 330 has a substantially circular shape, and the outer periphery of the humidifying filter 330 includes a water lifter 332 (see fig. 7) having a structure capable of holding water. The water lift 332 may be provided in plurality. As an example, the humidifying filter 330 may have a structure similar to that of a "water-wheel".

The humidifying filter 330 is rotatably installed, and water collected from the water lifter 332 moves upward, and when the water lifter 332 descends from the uppermost end of the humidifying filter 330 downward, water flows to the central portion of the humidifying filter 330 due to gravity. The humidifying filter 330 may be formed of cloth, felt, or sponge material that easily absorbs water.

The water lifter 332 may collect water by rotating. Therefore, the water lifter 332 may also be referred to as a collecting part.

A sterilization device 269 may be disposed at a rear side of the water tank 260, and the sterilization device 269 irradiates light to the inside of the water tank 260 in order to sterilize the water stored in the water tank 260. For example, the sterilization device 269 may include an ultraviolet LED.

A humidifying filter assembly 300 may be disposed at a rear portion of the drawer 220, i.e., at a rear side of the water tank 270. The humidification filter assembly 300 includes: a humidifying filter housing 310; and a humidifying filter 330 rotatably supported to the humidifying filter housing 310 and absorbing water stored in the water tank 260.

The humidifying air purifier 10 further includes a housing assembly 400 disposed inside the cabinet 100. The housing assembly 400 includes: a blower fan 480 for generating air flow; a fan cover 410 disposed in front of the blower fan 480; and a case cover 430 coupled to a rear side of the fan housing 410.

The blower fan 480 may be disposed in a fan installation space SP defined by the fan housing 410 and the case cover 430 (see fig. 16).

The housing assembly 400 may be disposed at the rear side of the door assembly 200.

The blower fan 480 includes a centrifugal fan that sucks air in an axial direction and discharges the air in a radial direction. As an example, the centrifugal fan may comprise a sirocco fan. The axial direction of the blower fan 480 may be the front-rear direction.

The fan cover 410 includes a fan inlet 415 (see fig. 11). The fan suction port 415 may include suction guide ribs extending in a radial or circumferential shape. With the suction guide rib, a user's hand can be prevented from being put into the blower fan 480.

The humidifying air purifier 10 further includes an electrical part 450 provided with a plurality of electrical components 453. The electrical component part 450 may further include an electrical component board 451 covering an open upper portion of the main body frame 110, and the electrical component 453 may be disposed on an upper side surface of the electrical component board 451.

The electrical component part 450 may further include an electrical component cover 455 shielding at least a portion of the plurality of electrical component parts 453.

The electrical installation plate 451 may extend forward from an upper portion of the housing assembly 400. The upper panel 105 may be coupled to an upper side of the electrical board 451 to protect the electrical components 453.

A slide rail 235 for guiding the drawing and the drawing of the door assembly 200 may be provided inside the main body frame 110.

The slide rails 235 may be disposed at both sides of the lower portion of the main body frame 110. The rail guide 230 provided to the door assembly 200 may slide forward and backward along the slide rail 235.

A guide cover 236 is disposed outside the slide rail 235. The slide rail 235 may not be exposed to the outside by the guide rail cover 236.

That is, the guide rail cover 236 may cover the slide rail 235 so as not to be exposed to the space part 112.

The main body frame 110 further includes an illumination bracket 116 for providing an illumination device. The illumination bracket 116 may be disposed at an upper side of the base 101 of the case 100 with a space therebetween. The recess 30 may be understood as a space between the base 101 and the illumination stand 116.

The lighting device includes: an illumination PCB122 provided with an illumination source; and a lighting cover 124 coupled to the lighting PCB 122. The illumination source may be provided in plurality.

The illumination cover 124 includes a partition rib that partitions the internal space of the illumination cover 124 into a plurality of spaces, and illumination sources may be arranged in each of the plurality of spaces.

A reflection plate 120 may be disposed on an upper surface of the base 101. The reflection plate 120 may be provided to softly reflect or diffuse the light irradiated from the illumination source. The illumination source is disposed above the reflector 120, and irradiates light downward toward the reflector 120. The recess 30 may be formed between the illumination source and the reflection plate 120.

Fig. 7 is a diagram showing the state that the air filter and the water tank of the embodiment of the present invention are arranged in the door, fig. 8 is a diagram showing the state that the filter arranged in the door is separated, fig. 9 is a perspective view of the door assembly of the embodiment of the present invention, fig. 10 is a top view of the door assembly of the embodiment of the present invention, and fig. 11 is a diagram showing the inside of the box body of the embodiment of the present invention.

Referring to fig. 7 to 11, the door assembly 200 according to the embodiment of the present invention includes a drawer 220 combined to the rear surface of a door panel 210.

The drawer 220 may be drawn out in the front direction and drawn in the rear direction, and may be provided in a drawer form.

An air filter assembly 280, a humidification filter assembly 300, a water tank 270, and a water tank 260 may be provided at the drawer 220.

The drawer 220 includes: a door front side part 221 constituting a front side of the drawer 220; a door bottom surface portion 224 constituting a bottom surface of the drawer 220; a door side portion 222 extending upward from both sides of the door bottom portion 224; and a door rear side portion 223 provided on the rear side of the door side portion 222.

An intake port 225 through which air is taken in is formed in the door bottom surface portion 224. The suction port 225 is located on the rear side of the door front surface part 221, and at least a part of the door bottom surface part 224 penetrates the suction port 225. The air outside the humidified air purifier 10 is sucked into the suction port 225 through the recess 30, and the sucked air can flow upward.

The door bottom portion 224 includes an air filter seating portion 226 for seating the air filter assembly 280. The air filter installation part 226 is located at the rear side of the suction port 225, and constitutes a flat surface on which the bottom surface of the air filter assembly 280 can be installed.

The door side portion 222 includes a filter guide 225a supporting a side portion of the air filter assembly 280. The filter guide 225a may extend upward from both sides of the air filter installation portion 226, and may extend obliquely forward from a lower portion of the filter guide 225a to an upper portion. Therefore, the air filter unit 280 may be disposed to be inclined forward in a state of being seated in the filter seating portion 226, and thus, a user may lift the air filter unit 280 upward to be easily separated from the drawer 220.

The door side portion 222 further includes a filter support portion 225b, and the filter support portion 225b extends in the left-right direction from the filter guide 225a to support a portion of the front surface of the air filter assembly 280. In a state where the air filter assembly 280 is obliquely arranged, the filter support portion 225b may function as a "support protrusion" to prevent the air filter assembly 280 from falling forward.

The filter support portion 225b may be stepped inward with respect to the inner side surface of the filter guide 225 a.

The door bottom surface portion 224 further includes a water tank mounting portion 227 on which the water tank 260 is mounted. The water tank mounting portion 227 may be disposed at a position lower than the air filter mounting portion 226.

A through hole 228 in which the sterilization device 269 is disposed is formed in the door rear side surface portion 223. For example, the sterilization device 269 may be disposed inside the through hole 228 or may be disposed behind the through hole 228.

The light irradiated from the sterilizing device 269 is transmitted to the water tank 260 through the through hole 228, thereby sterilizing the stored water.

A water tank 270 is disposed above the water tank 260. The water tank 270 includes: a tank main body for storing water; and a tank cover detachably coupled to an upper side of the tank main body. A user can supplement water to the inside of the tank main body by separating the tank cover.

When the water tank 270 is placed in the water tank 260, the floating device 276 of the water tank 270 is opened so that water stored in the water tank 270 can flow into the water storage portion of the water tank 260.

The water tank 260 may be provided with the humidifying filter assembly 300. The humidifying filter assembly 300 is located at the rear side of the water tank 270, and the lower portion of the humidifying filter assembly 300 may be configured to be submerged into the second water storage part 229.

The humidification filter assembly 300 includes: a humidification filter case 310 having a shaft support part 315; and a humidifying filter 330 having a central shaft 335 supported by the shaft support 315. The center shaft 335 of the humidification filter 330 may be rotated in a clockwise direction or a counterclockwise direction in a state of being supported by the shaft support part 315.

The humidifying filter 330 includes a water lifter 332 that scoops up the water stored in the second water storage portion 229 of the water tank 260. The water scooped up from the water scooper 332 moves upward while the humidification filter 330 rotates, and when the water falls downward again, the water can flow into the humidification filter 330. The water flowing into the humidification filter 330 can permeate into the humidification filter 330.

The humidifying air purifier 10 further includes a driving device for rotating the humidifying filter 330, the driving device including a driving motor 353 (see fig. 6) and a driving gear 355, the driving gear 355 being coupled to the driving motor 353 to rotate. The driving motor 353 and the driving gear 355 may be provided to the fan housing 410.

The humidifying filter 330 includes a filter gear 338 interlocked with the driving gear 355. The filter gear 338 is provided on the outer circumferential surface of the humidification filter 330 and may be engaged with the driving gear 355. When the driving motor 353 is driven, the filter gear 338 is interlocked with the driving gear 355 to be rotatable in a clockwise direction or a counterclockwise direction.

Fig. 12 is an exploded perspective view showing a housing assembly and a peripheral structure thereof according to an embodiment of the present invention, fig. 13 is a rear perspective view of a fan cover according to an embodiment of the present invention, and fig. 14 is an exploded perspective view of an air supply fan and a housing cover according to an embodiment of the present invention.

The fan cover 410 includes a cover plate 411 covering the rear of the main body frame 110.

The cover plate 411 may be coupled to the main body frame 110 to shield an open rear end portion of the main body frame 110.

A fan inlet 415 through which air is sucked is formed in the cover plate 411. The fan suction port 415 may include suction guide ribs extending in a radial or circumferential direction. For example, the fan suction port 415 may be located at a central portion of the cover plate 411.

The air in the main body frame 110 can flow toward the housing cover 430 through the fan inlet 415.

An electrical board 451 provided with a plurality of electrical components may be coupled to an upper portion of the cover plate 411.

The electric installation plate 451 may be formed integrally with the cover plate 411. For example, the electrical board 451 and the cover plate 411 may be formed as

And (4) shape.

The cover plate 411 may be combined with the case cover 430 at the rear. The coupling between the cover plate 411 and the case cover 430 guides the flow direction of air forcibly generated by the blower fan 480.

The fan cover 410 further includes a seating rib 413 in which a fan motor 483, which will be described later, is seated.

The seating rib 413 extends rearward from the rear surface of the hood plate 411. For example, the seating rib 413 may be formed at a central portion of the fan inlet 415. The seating rib 413 is formed to have a cylindrical shape having a hollow inside with reference to a center of the fan inlet 415.

That is, the seating rib 413 may be formed to protrude in a circular shape from the rear surface of the hood plate 411.

The seating rib 413 may be internally formed with a fan motor mounting space 413a for receiving a fan motor 483. An impeller 485 of the blower fan 480 may be provided outside the seating rib 413.

The fan cover 410 further includes a restriction rib 417 guiding the coupling of the case cover 430. The restriction rib 417 may be formed with a space or a groove to make the front surface of the housing cover 430 closely contact the rear surface of the hood plate 411.

The restricting rib 417 guides the case cover 430 to be exactly coupled to a designated position in the rear surface of the fan housing 410. For example, the front ends of the outer peripheral surfaces 432, 433, 434 of the housing cover 430 may be inserted into or fixed to the restricting rib 417. Therefore, the flow of air to the inner space formed by the case cover 430 and the fan cover 410 can be guided.

In other words, the front surface of the case cover 430 may be closely attached to the rear surface of the hood plate 411.

Also, an inner space may be formed between the fan cover 410 and the case cover 430. A flow path of air passing through the blower fan 480 may be formed in the internal space.

The restricting rib 417 may be protrudingly formed at the rear surface of the hood plate 411. Also, the restriction rib 417 may extend to correspond to a front end of the housing cover 430.

For example, the restricting rib 417 may be formed in an open curve (open curve) shape. For example, the restricting rib 417 may be formed in a curved band shape and be curved from the rear surface of the cover plate 411.

Further, the blower fan 480 may include an impeller 485 for sucking and discharging air.

The impeller 485 receives a rotational force of the fan motor 483 to be rotatably disposed inside the case cover 430.

In detail, a seating hole 487 may be formed in the hub 486 of the impeller 485. A locking portion 481 to which a rotation shaft of the fan motor 483 is connected may be attached to the attachment port 487. Therefore, the impeller 485 can rotate together with the lock 481. Of course, the locking portion 481 may be integrally formed with the hub 486 of the impeller 485.

In addition, the blower fan 480 may further include: a fan motor 483 for generating power; and a motor cover 482 disposing the fan motor 483 to the seating rib 413.

The fan motor 483 may be received and fixed in the fan motor installation space 413a where the rib 413 is installed. A rotation shaft of the fan motor 483 may be coupled to the locking part 481 and transmit a rotation force to the impeller 485.

An opening through which a rotation shaft of the fan motor 483 passes and is connected to a locking part 481 is formed at a central portion of the motor cover 482. That is, the motor cover 482 may be located between the fan motor 483 and the locking part 481.

The case cover 430 includes: a cover 431 forming a space for accommodating the blower fan 480; and guide plates 432, 433, 434.

The cover plate 431 may be understood as a rear side of the housing cover 430, and the guide plates 432, 433, 434 may be understood as an outer circumferential surface or a side of the housing cover 430.

That is, the cover plate 431 is provided to constitute a rear surface of the housing cover.

The guide plates 432, 433, and 434 guide the flow direction of the air passing through the blower fan 480, and thus may be used as guide walls.

The cover plate 431 is disposed at a position spaced apart from the rear of the fan cover 410.

At the front surface of the cover plate 431, the guide plates 432, 433, 434 may extend toward the fan housing 410. Therefore, the cover 431 and the guide plates 432, 433, 434 form a space for accommodating the blower fan 480.

The guide plates 432, 433, and 434 are formed to extend so as to guide the air passing through the blower fan 480 upward from the radial direction.

In detail, the guide plates 432, 433, 434 may extend forward along an outer circumference of an outer end of the cover plate 431. For example, the guide plates 432, 433, 434 may extend vertically along the edge of the cover plate 431.

Therefore, the guide plates 432, 433, 434 may contact the rear surface of the fan housing 410. For example, the front ends of the guide plates 432, 433, 434 may contact or be inserted into the restricting rib 417 of the cover plate 411.

As a result, the fan cover 410, the cover plate 431, and the guide plates 432, 433, and 434 can guide the flow of air forcibly generated by the air supply fan 480. The air forcibly generated by the air supply fan 480 may flow in a Scroll (Scroll) flow path.

Accordingly, the fan cover 410 and the case cover 430 may be collectively referred to as a "volute case". That is, the blower fan 480 may be disposed inside the scroll cases 410 and 430.

The case assembly 400 including the fan cover 410, the case cover 430, and the blowing fan 480 may be referred to as a "blowing device".

The air flow path flowing into the blower fan 480 through the fan inlet 415 of the cover plate 411 may be referred to as a "suction flow path". The air flow path that is discharged from the blower fan 480 and flows to the discharge portion 109 may be referred to as a "discharge flow path".

The discharge flow path may be divided into a first discharge flow path 430a that flows under the guidance of a first guide 432, which will be described later, and a second discharge flow path 430b that flows to the open end 431a under the guidance of a second guide 433.

The cover 431 and the guide plates 432, 433, 434 may have openings defined along the upper ends thereof so that the air flowing along the discharge channels 430a, 430b flows toward the discharge portion 109.

That is, an open end 431a may be formed at an upper end of the cover plate 431. The open end 431a may be understood to form an edge of the opening. The discharge portion 109 may cover an upper side of the open end 431 a.

Therefore, the air discharged from the blower fan 480 in the radial direction can flow to the open end 431a, which is the upper portion of the casing cover 430. The air flowing to the upper portion of the housing cover 430 is discharged to the outside through the discharge portion 109.

An opening formed by the open end 431a, the upper end of the second guide 433, the upper end of the third guide 434, and the upper end of the cover plate 411 may be defined as a discharge port.

That is, the discharge port is located downstream of the second discharge flow path 430b, and may be understood as an opening that guides air to be discharged to the discharge portion 109.

In addition, the guide plates 432, 433, 434 may extend in a shape corresponding to the restricting rib 417. For example, the guide plates 432, 433, 434 may be extended from one upper end of the cover plate 431 to the other upper end in an arc shape.

That is, the guide plates 432, 433, 434 may have an open curve shape as a whole to correspond to the restricting rib 417.

In detail, the guide plates 432, 433, 434 may include a first guide 432, a second guide 433, and a third guide 434.

The first guide 432 guides the air discharged from the blower fan 480 upward, and thus may be referred to as a "flow guide wall". The second guide 433 extends from the flow guide wall, and thus, may be referred to as an "extension guide wall". The third guide 434 guides air toward the discharge portion 109, and thus may be referred to as a "discharge guide wall".

The second guide 433 may extend downward from an upper end of one side of the cover plate 431 to a first point. For example, the second guide 433 may extend downward along one side edge of the cover 431.

Wherein the first point may be located at one side of the cover plate 431. In detail, the first point may be defined as a point located on a virtual extension line rotated from a vertical reference line D by a predetermined first angle θ (see fig. 16) along the air flow direction F around a reference point O (described later). For example, the first angle θ may be set to 270 °.

The second guide 433 may extend upward from one upper end of the first guide 432. That is, the second guide may extend upward from the first point.

The second guide member 433 may be located adjacent to any one of the pair of side panels 103 (refer to fig. 3). For example, the second guide 433 may be positioned adjacent to the left side panel.

The first guide 432 may extend in an arc shape to surround an outer circumference of the blower fan 480.

In detail, the first guide 432 may extend from the first point to the second point 435 (cut-off) in an arc shape.

The second point may be located further above the first point. The second point may be understood as a point where the cut-off portion 435 is formed.

Wherein the second point may be defined as a point located on an imaginary extension line rotated from the vertical reference line D by a preset second angle along the air flow direction F centering on the reference point O. For example, the second angle may be set to an angle within 0 ° to 20 °.

That is, the first guide 432 may extend from the lower end of the second guide 433 to the cutting portion 435 in a direction of drawing an arc (arc) around the reference point O.

The third guide 434 may extend from the first guide 432 at an opposite side of the second guide 433.

The third guide 434 may extend from a cut-off portion 435 formed at the other side upper end of the first guide 432. That is, the third guide 434 may be obliquely extended upward from the second point to be away from the second guide 433.

The third guide 434 may be located adjacent to the other side panel of the pair of side panels 103 (refer to fig. 3). For example, the third guide 434 may be adjacent to the right side panel.

The third guide 434 may extend from the second point 435 to the other side upper end of the cover plate 431. The third guide 434 may extend diagonally to expand the second discharge flow path 430b downstream.

That is, the third guide 434 may extend from an upper end portion of the first guide 432 to an extension plate 436, which will be described later.

In detail, the third guide 434 may extend from the cut part 435 to one side end of the extension plate 436.

A rear end portion 432a (refer to fig. 16) of the first guide 432 may be connected to a rear end portion 434a of the third guide 434. A front end portion 432b (see fig. 16) of the first guide 432 may be connected to a front end portion 434b of the third guide 434.

The third guide 434 may be formed to have an inner side surface inclined. The inner surface of the third guide 434 may be a surface facing the second discharge flow path 430 b.

That is, the rear end portion 434a of the third guide 434 may be located more inward than the front end portion 434b of the third guide 434.

Therefore, the inner side surface of the third guide 434 extending from the rear end 434a of the third guide 434 to the front end 434b of the third guide 434 may be formed as an inclined surface.

Further, the inclined surface of the third guide 434 may extend perpendicularly to the cover plate 431 from a point connected to the extension plate 436.

That is, the rear end portion 434a of the third guide 434 may extend along the extending direction of the third guide 434 so as to draw a larger arc than the front end portion 434b of the third guide 434. In other words, the rear end portion of the third guide may extend relatively longer than the front end portion of the third guide (see fig. 15).

The extension plate 436 may extend laterally from an upper end of the third guide 434. Here, the side may be understood as a direction away from the second guide 433.

For example, the distance from the upper end of the third guide 434 to the other side panel 103 (right side panel) may be greater than the distance from the upper end of the second guide 433 to the one side panel 103 (left side panel).

In addition, when the upper end of the third guide 434 is viewed from below, the upper end of the third guide 434 and the first guide 432 may be arranged to overlap. That is, the upper end of the third guide 434 may be spaced upward from the first guide 432.

Cut-off parts 435 may be formed on the guide plates 432, 433, 434.

The cut-off portion 435 may be formed in an arc shape to connect the first guide 432 and the third guide 434.

The cut-off portion 435 includes the second point described above as a portion where the first guide 432 and the third guide 434 meet.

The cutting unit 435 may be understood as a reference for distinguishing the first discharge flow path 430a from the second discharge flow path 430 b. The flow paths are not physically separated but arbitrarily separated for convenience of description.

Further, some of the air flowing into the second discharge flow path 430b may collide with the blocking portion 435 and may flow into the first discharge flow path 430a again. Noise may be generated during the collision and re-inflow.

In this connection, the cutting unit 435 will be described in detail later with reference to fig. 15.

The guide plates 432, 433, and 434 may be formed to increase the cross-sectional area of the air flow path formed in the case cover 430 upward. Specifically, the width W of the discharge channels 430a and 430b may gradually increase from the cutoff portion 435 along the air flow direction F.

The width W of the discharge flow paths 430a and 430b may be defined as a distance from the rotation axis S of the impeller 485 to the inner surfaces of the guide plates 432, 433, and 434. In detail, the width W of the discharge flow paths 430a and 430b may be defined as a distance between the guide plates 432, 433, and 434 and the rotation axis S in the radial direction of the impeller 485.

That is, the width W of the discharge flow path may be larger from the cutoff portion 435 along the air flow direction F toward the open end 431 a. For example, a radial distance W1 between the cutoff portion 435 and the outer peripheral surface of the impeller 485 around the reference point O is smaller than any other radial distance W2 along the air flow direction F.

Therefore, the cross-sectional flow area of the discharge flow path may gradually increase from the cutoff portion 435 along the air flow direction F. This reduces the flow resistance of the air passing through the blower fan 480, thereby reducing the noise generated from the upper fan 130.

The housing cover 430 further includes a coupling bracket 438 coupled to the rear panel 107.

The coupling brackets 438 may be disposed at both sides and an upper portion of the housing cover 430. That is, the coupling bracket 438 may be provided on the outer side surface of the guide plates 432, 433, 434.

The coupling bracket 438 may include a fastening portion 438a (refer to fig. 25) to which a fastening member is coupled. The fastening member may be coupled to the rear panel 107 through the fastening portion 438 a.

In addition, the housing cover 430 also includes a sensor holder 440 in which a plurality of sensors 500, 550, 560 are disposed. The sensor holder 440 may be coupled to the outer lateral surfaces of the guide plates 432, 433, 434.

That is, the sensor holder 440 may be provided in a space where no air flow, that is, no air suction or discharge, is formed in the housing cover 430. For example, the sensor holder 440 may be coupled to a lower surface of the extension plate 436 and an outer surface of the first guide 432 to form an opening in an outer direction of the cutting part 435.

A through hole 446 may be formed between the sensor holder 440 and the guide plates 432 and 434.

Wires (wire) connected to the plurality of sensors 500, 550, 560 disposed at the sensor holder 440 may be provided at the through hole 446. That is, the through hole 446 may be named a wire connection port.

The sensor holder 440 includes: a holder main body 441 provided with a plurality of sensors 500, 550, 560; and a holder support portion 443, 445 for supporting the holder main body 441.

The holder supporting portions 443, 445 may be coupled to the case cover 430 so that the holder main body 441 is supported by the case cover 430. For example, the holder supporting portions 443, 445 include: a first support portion 443 for coupling the upper portion of the holder body 441 to the outer surface of the guide plate 434; and a second support part 445 connecting a lower part of the holder main body 441 to an outer surface of the guide plate 432.

In addition, the reference point O of the case cover 430 is the same as the center point of the blower fan 480. Therefore, the reference point O may be located on the rotation axis S of the blower fan 480. Here, the rotation axis S may be understood as an imaginary horizontal line drawn forward from the reference point O.

A virtual perpendicular line perpendicular to the rotation axis S is defined as a vertical reference line D. At this time, the reference point O may be understood as a point where the rotation axis S intersects the vertical reference line D, i.e., a fulcrum of a vertical line. Therefore, the vertical reference line D can be understood as an imaginary vertical line drawn upward from the reference point O.

As a result, the air flowing through the housing assembly 400 can flow in the direction of the rotation axis S and be discharged in the direction of the vertical reference line D.

The flow of air through the housing assembly 400 is described in detail as follows: the air flowing into the blower fan 480 from the direction of the rotation axis S can flow to the open end 431a along a Scroll (Scroll) flow path formed by the fan cover 410 and the casing cover 430.

As described above, the air discharge flow path from the blower fan 480 toward the discharge unit 109 may include: a first discharge channel 430a that flows under the guidance of the first guide 432; and a second discharge channel 430b that flows to the open end 431a under the guidance of the second guide 433.

Therefore, the air flowing into the blower fan 480 is discharged in the radial direction, the air discharged in the radial direction flows along the first discharge flow path 430a in a curved manner and flows into the second discharge flow path 430b, and the air flowing into the second discharge flow path 430b flows upward in the direction of the vertical reference line D and is discharged to the outside through the discharge portion 109 located above the open end 431 a.

Fig. 15 is an enlarged view showing a of fig. 14.

Referring to fig. 15, the cut-off portion 435 may be formed to extend from a rear end tangent point 435a where the rear end portion 432a of the first guide 432 is connected to the rear end portion 434a of the third guide 434 to a front end tangent point 435b where the front end portion 432b of the first guide is connected to the front end portion 434b of the third guide.

A rear end portion 434a of the third guide 434 may be located more inward than a front end portion 434b of the third guide 434. Therefore, the rear end tangent point 435a may be located more inward than the front end tangent point 435 b.

Wherein a tangent DM passing through the rear end tangent point 435a and a tangent DP passing through the front end tangent point 435b may be parallel to the vertical reference line D.

An inner surface of the cut-off portion 435 extending from the rear end tangent point 435a to the front end tangent point 435b of the cut-off portion 435 may be formed as a curved surface. For example, the inner surface of the cutting unit 435 may be a curved surface in which a concave surface and a convex surface are repeated in the vertical direction and/or the front-rear direction.

This can reduce the flow resistance of the air that collides with the cutoff portion 435.

That is, the inner surface of the cut-off portion 435 may form a protrusion and a recess (dotted line).

In other words, the inner surface of the cut-off portion 435 may be formed three-dimensionally by a convex portion and a concave portion (dotted line) in the direction of the rotation axis S of the blower fan 480.

In detail, the inner surface of the cut-off portion 435 may include: a projecting portion formed to project from the rear end tangent point 435a to the inside to the cutting portion center point O'; and a recessed portion recessed outward from the cutting portion center point O' to the leading end tangent point 435 b.

Wherein the cutoff center point O' may be defined as a center point between the rear end tangent point 435a and the front end tangent point 435 b. Therefore, the cutoff center point O 'may be understood as an inflection point O'.

In still other words, the cut-off portion 435 may form an inner surface having an arc (arc) shape.

As described above, some of the air flowing into the second discharge flow path 430b collides with the cutoff portion 435 and flows into the first discharge flow path 430a again. The collision and re-inflow process may generate noise.

That is, the cut-off portion 435 may be understood as a boundary line between the discharge and the re-suction of the air flow in the housing cover 430.

The experimental results show that the flow distribution of the air collided with the cutoff portion 435 is not linearly increased in the rotational axial direction S of the blower fan 480. Therefore, the cutting unit 435 does not generate a noise (BPF) of internal flow due to a pressure difference or a pressure concentration caused by collision of the fluid (air).

The embodiment of the present invention proposes an inner surface of the cut-off portion 435 formed with a protrusion and a recess in order to mitigate collision of fluid (air) at the cut-off portion 435. Thereby, the internal flow noise can be reduced.

Further, the third guide 434 may extend from the cutting part 435 in the air discharge direction. Meanwhile, the third guide 434 may be extended such that an inclination angle formed with the cover plate 431 is changed according to the discharge direction of the air.

In detail, the third guide 434 may be formed to be gradually perpendicular to an inclination angle formed by the cap plate 431 along the discharge direction from the cutting part 435 connecting the rear end tangent point 435a, the inflection point O', and the front end tangent point 435 b. That is, the third guide 434 may be formed in a three-dimensional shape.

Wherein, in the change of the inclination angle, if the inclination angle formed by the cover plate 431 and the third guide 434 is an acute angle, the change of the inclination angle gradually increases and changes to be vertical; if the inclination angle formed by the cover 431 and the third guide 434 is an obtuse angle, the change of the inclination angle gradually decreases to be vertical. Accordingly, a distal end portion of the third guide 434 may be formed perpendicular to the cover plate 431.

Thereby, the air flowing toward the open end 431a along the third guide 434 flows along the inner surface, i.e., the inclined surface, of the third guide 434. Thus, there is an advantage that the flow resistance is relatively reduced and the flow cross-sectional area is increased in the flow direction. As a result, the flow noise inside can be reduced.

Fig. 16 is a view showing a part of the structure of the housing cover according to the embodiment of the present invention. In detail, fig. 16 is a diagram in which the sensor holder 440 is omitted for easier description of the extension plate 436.

Referring to fig. 16, the second guide 433 may include a cutting portion 433 a.

The cutting portion 433a may be formed such that an upper portion of the second guide 433 is inclined rearward toward an upper end. The width of the cutting portion 433a is also wider toward the upper end.

A hole for guiding the combination of the cutting part 433a with the fan housing 410 may be formed at the cutting part 433 a. The hole may be provided to be capable of forming a fitting with the cover plate 411.

The case cover 430 further includes an extension plate 436 extending from the third guide 434.

The extension plate 436 may be positioned below the ejection portion 109 and the ejection grill 170.

The extension plate 436 may extend along the upper end of the cover plate 431 in a lateral direction from the upper end of the third guide 434.

That is, the extension plate 436 may be bent from the third guide 434 and extended along the upper end of the case cover 430. For example, the extension plate 436 may be bent from the third guide 434 and extended toward a side end of the cover plate 431.

The extension plate 436 and the third guide 434 may be formed to be bent toward the inside of the fitting housing cover 430.

The extension plate 436 may include a stepped rib 436a, and the stepped rib 436a may be stepped to seat a discharge grill 170 (see fig. 27), which will be described later. The stepped rib 436a can support the grill mounting groove 107f (see fig. 27) and the discharge grill 170, which will be described later, together.

The extension plate 436 may extend along the upper end of the cover plate 431 by a predetermined length L. For example, the predetermined length L may be set to about 75 mm.

On the other hand, the extension plate 436 may extend perpendicularly from the upper end of the cover plate 431. That is, the extension plate 436 may extend forward from the cover plate 431 by the predetermined length L.

The extension plate 436 may be positioned downstream of the second ejection flow path 430 b. That is, the extension plate 436 may be located beside the discharge port.

Accordingly, the flow direction of the air discharged through the discharge portion 109 can be guided relatively upward as compared with the case where the extension plate 436 is not formed.

For convenience of explanation, the third guide 434 is assumed to extend straight (dotted line) from the cut-off portion 435 to the upper end of the cover 431.

In this assumption, the virtual third guide V and the cover plate 431 may extend such that the recessed space formed by the extension plate 436 and the third guide 434 is included in the second discharge flow path 430 b.

That is, the discharge port may be expanded toward both side ends of the cover plate 431. Therefore, the flow cross-sectional area can also be enlarged in proportion thereto.

The virtual third guide V may extend in a direction that is larger than the direction in which the third guide 434 extends, with respect to the vertical reference line D.

Accordingly, the air passing through the discharge portion 109 under the guidance of the virtual third guide V can form a flow of the discharged air inclined in a lateral direction with respect to the air passing through the discharge portion 109 under the guidance of the third guide 434.

Fig. 17A and 17B are experimental diagrams showing a comparison of the flow of the discharged air according to the presence or absence of the extension plate of the humidified air purifier according to the embodiment of the present invention.

Fig. 17A is an experimental diagram showing a flow (pressure) distribution of air discharged from the discharge portion 109 of the humidified air purifier provided with the virtual third guide V, and fig. 17B is an experimental diagram showing a flow distribution of air discharged from the discharge portion 109 of the humidified air purifier provided with the third guide 434 and the extension plate 436.

Referring to fig. 17A and 17B, the flow (pressure) distribution of the person (Man) lying on the bed and the air discharged from the humidified air purifier disposed near the bed can be confirmed. At this time, the height of the discharge portion 109 of the humidifying air purifier is set to be the same as the height of a head portion where the respiratory organ of the person is located.

Referring to fig. 17A, the air discharged through the discharge portion 109 of the humidified air purifier provided with the virtual third guide V is discharged relatively more toward the direction of the person. Thus, the spitting air can form an air flow directly contacting the head portion of the person.

Referring to fig. 17B, the air discharged through the discharge portion 109 of the humidified air purifier provided with the third guide 434 and the extension plate 436 may form an air flow relatively concentrated upward without directly contacting the head portion.

In the experiment of fig. 17B, the predetermined length L of the extension plate 436 was set to 75 mm.

That is, the extension plate 436 can collect the air discharged from the discharge portion 109 relatively upward.

The humidifying air purifier 10 of the embodiment of the utility model is a furniture type humidifying air purifier which plays the role of furniture such as a bookcase and a desk. Therefore, it is generally possible to imagine an embodiment of a configuration similar to furniture configured in an indoor space.

For example, to create a more comfortable sleeping environment for the user, the user may place a humidifying air purifier near the bed. In this case, the position of the air spouting portion of the furniture type humidifying air purifier to provide a function such as a bookcase, a table, etc. may be configured to be relatively close to the respiratory organs of an adult who is generally lying in bed.

Thus, the air discharged from the humidified air purifier disposed in the vicinity of the bed can be directly supplied to the user. Therefore, the user feels uncomfortable and there is also a danger in terms of hygiene.

In contrast, the humidifying air purifier 10 according to the embodiment of the present invention can concentrate the discharge direction of the air guided by the extension plate 436 upward. Therefore, in the use environment described above, the discharged air may not be directly supplied to the user.

As a result, the humidifying air purifier 10 can increase the convenience of the user and improve the degree of freedom in product arrangement.

Fig. 18 is a perspective view of an impeller according to an embodiment of the present invention.

The impeller 485 may have a cylindrical shape as a whole. In detail, the impeller 485 may include: a plurality of blades 488; a main plate 490 to which a plurality of blades 488 are coupled; and a hub 486 provided at a central portion of the main plate 490 and protruding forward.

As described above, the hub 486 may be provided with a rotation shaft connection portion 481 to which a rotation shaft of the fan motor 483 is connected (see fig. 14). The plurality of blades 488 may be spaced apart from each other along a circumferential direction of the main plate 490.

The impeller 485 further includes a fixing portion 492 provided at a front portion of the plurality of blades 488. The fixing portion 492 functions to fix the plurality of blades 488. The rear end portions of the plurality of blades 488 are coupled to the main plate 490, and the front end portions thereof may be coupled to the fixing portion 492.

A fan motor 483 is disposed in front of the hub 486 of the impeller 485. The fan motor 483 may be seated on the seating rib 413 of the fan cover 410.

A motor cover 482 and a locking part 481 may be disposed at the rear of the fan motor 483. The motor cover 482 may mount and fix the fan motor 483 to the seating rib 413 of the fan cover 410. The locking part 481 is coupled to a rotary shaft of the fan motor 483, is disposed on the hub 486, and transmits the rotational power of the fan motor 483 to the impeller 485.

Fig. 19 is a diagram showing the shape of an impeller blade according to an embodiment of the present invention.

The blades 488 of an embodiment of the present invention may have an airfoil shape that is generally curved in one direction.

In detail, at least a portion of the chord c (chord) of the blade 488 is located outside of the blade 488 and may be formed to face the pressure surface 601. In this case, the chord C of the blade is an imaginary straight line connecting the leading edge 603(leading edge) and the trailing edge 604(trailing edge).

In addition, the pressure surface 601(positive pressure surface) of the vane 488 may be formed concavely, and the negative pressure surface 602(negative pressure surface) may be formed convexly.

The impeller 485 is rotatable in a direction in which the pressure surface 601 of the blade 488 receives air pressure. The air sucked into the impeller 485 through the fan suction port 415 (see fig. 6) may collide with the leading edge 603, flow along the surfaces of the pressure surface 601 and the negative pressure surface 602, and flow and separate at the trailing edge 604.

The vanes 488 can be formed to have a prescribed leading edge radius R.

Hereinafter, in order to describe the shape of the blade 488 of the present invention in detail, virtual points, lines, and the like, which are the reference of drawing, are defined.

The mean camber line 656 may be an imaginary line connecting the centers of imaginary circles inscribed in the pressure surface 601 and the negative pressure surface 602.

Arc height (diameter) is the distance between mean arc line 656 and chord C, and the maximum value of the arc height may be named maximum arc height M. Additionally, in a direction parallel to chord C, the distance between the point 655 on mean camber line 656 having the maximum camber M and the leading edge 603 may be named the maximum camber position ML.

An imaginary circle 654 may be drawn centered on a point 655 on the mean arc 656 corresponding to the maximum arc height position ML and inscribed on the pressure surface 601 and the suction surface 602. In this case, the point of tangency between the imaginary circle 654 and the negative pressure surface 602 may be named a maximum arc height point 658. That is, the maximum arc height point 658 may be a point corresponding to the maximum arc height position ML in the negative pressure surface 602.

Negative pressure surface 602 may include first and second linear surfaces 606, 607 between maximum arc height point 658 and leading edge 603.

Since the first linear surface 606 and the second linear surface 607 are formed flat, it is difficult for the first linear surface 606 and the second linear surface 607 to determine an arc based on the definition of the foregoing description.

Accordingly, an imaginary line 657 can be drawn connecting the point 655 on the mean camber line 656 corresponding to the maximum camber position ML and the leading edge 603. The imaginary line 657 may be at a constant distance from the pressure surface 601 and the distance d between the imaginary line 657 and the pressure surface 601 may be the same as the radius d of the imaginary circle 654.

The imaginary line 657 may be the mean camber line of the blade when the suction surface 602 is assumed to not include the first and second linear surfaces 606, 607 and instead includes a curve that streamingly connects the leading edge 603 with the maximum camber point 658.

That is, the imaginary line 657 may be named an imaginary mean arc.

The negative pressure surface 602 may be provided with a reference point 605A.

In detail, reference point 605A may be located along the suction surface between maximum arc height point 658 and leading edge 603. The reference point 605A may be a point on the negative pressure surface 602 where the distance to the pressure surface 601 is the largest.

That is, the distance t from the negative pressure surface 602 to the pressure surface 601 may be the largest at the reference point. At this time, the distance may be a minimum distance t from a point of the negative pressure surface 602 to the pressure surface 601, and may be a thickness of the blade 488.

The distance t between the pressure surface 601 and the suction surface 602 may be farther from the leading edge 603 toward the reference point 605A and closer from the reference point 605A toward the trailing edge 604.

From the leading edge 603, a first imaginary straight line 651 can be drawn that is tangent to the imaginary line 657.

Specifically, a tangent line at a point on the imaginary line 657 which is a point at which the point is infinitely close to the leading edge 603 may be the first imaginary straight line 651. In addition, a second imaginary straight line 652 connecting the leading edge 603 and the reference point 605A can be drawn.

The angle formed by the first imaginary straight line 651 and the second imaginary straight line 652 may be named a set angle TH, and the set angle TH may be an acute angle. In more detail, the set angle TH may be 7.5 to 23 degrees.

A distance DL between the leading edge 603 and the reference point 605A in a direction parallel to the first imaginary straight line 651 may be named a set distance DL, which may be shorter than the maximum camber position ML of the blade 488.

In addition, the set distance DL may be 0.21 to 0.27 times the chord length CL of the blade 488.

The exact location of the reference point 605A can be determined from the set angle TH and the set distance DL.

The negative pressure surface 602 of the blade 488 is described in further detail below.

The negative pressure surface 602 of the blade 488 of embodiments of the present invention may include a first linear surface 606 and a second linear surface 607.

A first linear surface 606 may be located between datum 605A and leading edge 603 and a second linear surface 607 may be located between datum 605A and maximum arc height point 658.

The first and second linear surfaces 606 and 607 may be respectively formed flat and may be formed inclined to each other. The angle between the first linear surface 606 and the second linear surface 607 may be an obtuse angle.

The distance between the first linear surface 606 and the pressure surface 601 may be farther from the leading edge 603 toward the reference point 605A, and the distance between the second linear surface 607 and the pressure surface 601 may be closer from the reference point 605A toward the maximum arc height point 658.

The suction surface 602 may further include a curved connecting surface 605 connecting the first linear surface 606 and the second linear surface 607.

In this case, the reference point 605A may correspond to an inflection point of the connecting curved surface 605. However, without being limited thereto, the negative pressure surface 602 may not include the curved connecting surface 605, and the first linear surface 606 and the second linear surface 607 may be directly connected. In this case, the reference point 605A may be a connection point of the first linear surface 606 and the second linear surface 607.

Negative pressure surface 602 may also include a curved flow surface 608. A flow curve 608 may connect the second linear surface 607 to the trailing edge 604, and at least a portion of the flow curve 608 may be located between the maximum camber point 658 and the trailing edge 604.

The shape to be formed by the first and second linear surfaces 606, 607 may be named a Droop (Droop) shape or Dolphin head (Dolphin head) shape.

Fig. 20A is a diagram showing a conventional impeller blade shape as a comparative example, fig. 20B is a diagram showing an impeller blade shape according to an embodiment of the present invention, and fig. 21 is a diagram showing changes in air volume and noise between a conventional impeller and an impeller according to an embodiment of the present invention.

The blade 488 of the present invention and the existing blade 488' may have the same chord length CL and maximum camber M, and the maximum camber position ML may also be the same.

Additionally, the pressure surface 601 of the blade 488 of embodiments of the present invention may be the same as or similar to the pressure surface 601 'of existing blades 488'. In addition, the flow curve 608 of the vane 488 of the present embodiment may be the same as the corresponding portion of the negative pressure surface 602 'of the existing vane 488'.

However, in contrast to the conventional blade 488 ', in which the entire suction surface 602' is formed as a streamlined curved surface, the suction surface 602 of the blade 488 according to the embodiment of the present invention is different in shape because it includes the first linear surface 606 and the second linear surface 607.

The impeller having the shape of the conventional blade 488' and the impeller 485 having the shape of the blade 488 according to the embodiment of the present invention were operated, and a noise comparison experiment was performed. The impeller as the test object includes 37 blades, and is set to have a diameter of 270mm and a height of 88 mm. Further, each blade is set to an inlet angle of 68.2 degrees and an outlet angle of 162 degrees.

Referring to fig. 21, it is confirmed that the impeller b having the blade 488 according to the embodiment of the present invention has less noise than the impeller a having the conventional blade 488'. More specifically, the noise was reduced by 1.3dB for an air flow of 3.2CMM and by 1.1dB for an air flow of 5.3 CMM.

This confirms that the impeller b having the blades 488 according to the embodiment of the present invention reduces noise at any air volume compared to the impeller a having the conventional blades 488'. That is, the blade 488 of the present invention has the noise reduction effect not only under the specific air volume condition, but also for all air volumes.

Fig. 22 is a diagram showing the relationship between the air volume and the noise at different setting angles TH of the blades according to the embodiment of the present invention.

The set distance DL (see fig. 19) of the blade, which was used to test the relationship between the air volume and the noise at different set angles TH, was set to 0.21 times the chord length CL (see fig. 19).

Referring to fig. 22, it is confirmed that the set angles TH of the blades 488 according to the embodiment of the present invention are 7.5 degrees, 13 degrees, and 23 degrees, which reduce noise compared to the impeller having the conventional blades 488'.

It was confirmed that the noise reduction effect is small when the set angle TH is less than 7.5 or more than 23 degrees compared to the impeller having the conventional vane 488', and the noise reduction effect is maximum when the set angle TH is 13 degrees.

More specifically, the noise of 38.1dB was measured when the set angle TH was 13 degrees, the noise of 38.84dB was measured when the set angle TH was 7.5 degrees, and the noise of 38.63dB was measured when the set angle TH was 23 degrees, based on the air volume 5.3 CMM.

Accordingly, the set angle TH of the vane 488 may be 7.5 to 23 degrees, preferably 13 degrees.

Fig. 23 is a diagram showing the relationship between the respective air volumes and the noise when the set length of the blade of the embodiment of the present invention is DL.

The set angle TH (see fig. 19) of the blade, which was used to test the relationship between the air volume and the noise at the set distance DL, was set to 13 degrees.

Referring to fig. 23, it can be confirmed that the set distance DL of the blade 488 according to the embodiment of the present invention is 0.21 times the chord length CL and 0.27 times the chord length CL, and noise is reduced compared to the impeller having the conventional blade 488'.

It was confirmed that the noise reduction effect is small when the set distance DL is smaller than 0.21 times the chord length CL or larger than 0.27 times the chord length CL, compared with the impeller having the conventional vane 488', and the noise reduction effect is maximum when the set distance DL is 0.21 times the chord length CL.

Specifically, when the distance DL was set to 0.21 times the chord length CL based on the air volume 5.3CMM, 38.1dB of noise was measured, and when the distance DL was set to 0.27 times the chord length CL, 38.93dB of noise was measured.

Therefore, the set distance DL of the blade 488 may be 0.21 to 0.27 times the chord length CL, and preferably 0.21 times the chord length CL.

Fig. 24 is a perspective view showing a rear structure of the housing cover according to the embodiment of the present invention.

As previously described, the housing cover 430 may further include a sensor bracket 440 in which a plurality of sensors 500, 550, 560 (see fig. 25) are disposed. The sensor holder 440 may be attached to the outer side of the guide plates 432, 433, 434.

The sensor holder 440 may be provided in a space in which the flow of air, that is, the suction and discharge of air, is difficult to form in the housing cover 430.

Specifically, the sensor holder 440 may be provided in an empty space that does not function as an air discharge flow path in the case cover 430.

In detail, the sensor holder 440 may include: a holder body 441 for disposing a plurality of sensors 500, 550, 560; and a holder support portion 443, 445 for supporting the holder main body 441.

The holder body 441 may be formed to have a substantially hexahedral shape. The holder body 441 may be located at the sides of the guide plates 432, 433, 434.

Specifically, the holder body 441 may be positioned on a side of the cutting unit 435 between the third guide 434 and the first guide 432.

A sensor mounting space 441a for disposing a plurality of sensors 500, 550, 560 may be provided on the rear surface of the holder body 441. The sensor mounting space 441a may be understood as a space recessed forward from the rear surface of the holder body 441. A plurality of support ribs 441b for supporting a plurality of sensors and a sensor fastening portion 441c for fastening the sensors with a fastening member may be provided at the sensor mounting space 441 a.

The support rib 441b not only supports the plurality of sensors, but also can divide the installation positions of the plurality of sensors. A fastening member is coupled to the sensor fastening portion 441c, and the plurality of sensors can be coupled to the sensor holder 440 by the fastening member.

According to such a structure, the plurality of sensors can be stably fixed in the sensor mounting space 441 a. The sensor disposed in the sensor mounting space 441a can be shielded by the rear panel 107 coupled to the rear side of the case cover 430.

The holder support portions 443, 445 may support the holder main body 441 to the case cover 430. For example, the holder supporting portions 443, 445 include: a first support portion 443 connecting an upper portion of the holder body 441 to outer surfaces of the guide plates 432, 433, 434; and a second support part 445 connecting a lower part of the holder body 441 to outer surfaces of the guide plates 432, 433, 434.

For example, the first support portion 443 may be connected to at least one of the third guide 434 and the extension plate 436, and the second support portion 445 may be connected to the first guide 432.

In addition, a through hole 446 may be formed between the sensor holder 440 and the guide plates 432, 433, 434. Wires electrically connected to the plurality of sensors are arranged through the through hole 446.

A sensor charging device, which will be described later, may be provided on the rear surface of the sensor holder 440, specifically, the rear surface of the first support portion 443. For this, a charging device fastening portion 443a for fastening the sensor charging device with a fastening member is provided on the rear surface of the first support portion 443.

Fig. 25 is a diagram showing a sensor mounted on a housing cover according to an embodiment of the present invention, fig. 26 is a diagram showing a structure of a dust sensor according to an embodiment of the present invention, fig. 27 is a front perspective view of a rear panel according to an embodiment of the present invention, fig. 28 is a rear perspective view of a rear panel according to an embodiment of the present invention, and fig. 29 is a diagram showing a state in which a spit-out grill is removed from an upper side surface portion of a rear panel according to an embodiment of the present invention.

Referring to fig. 25 to 29, the humidifying air purifier 10 further includes a plurality of sensors 500, 550, 560 provided to the housing cover 430. The plurality of sensors 500, 550, 560 may be understood as a mechanism for acquiring environmental information of an indoor space by foreign substances contained in indoor air.

The plurality of sensors 500, 550, 560 may include a dust sensor 500 that detects an amount of dust contained in the indoor air. The dust sensor 500 may be disposed at a side of the housing cover 430.

In detail, the dust sensor 500 is mounted in the sensor mounting space 441a provided at the rear surface of the sensor holder 440, so that the amount of dust contained in the indoor air can be detected by the rear panel 107 coupled to the rear side of the housing cover 430. At this time, the rear panel 107 covers the dust sensor 500 so as not to be exposed to the outside.

In more detail, the dust sensor 500 includes a main body 510 provided with a member that actually detects the amount of dust in the air.

The body 510 may include: a sensor substrate 511 provided with a terminal portion 515; and a sensor cover 512 coupled to the sensor substrate 511, and incorporating a heater 517 and light transmitting/receiving portions 518 and 519 therein.

The terminal portion 515 may be understood as a mechanism that an electric wire or a prescribed connector to which the electric wire is connected can contact.

The sensor substrate 511 is provided with a space for mounting the terminal portion 515 and the sensor cover 512. The sensor substrate 511 is formed in a substantially rectangular plate shape, and may be seated in the sensor mounting space 441 a.

The sensor cover 512 may include a sensor flow path 512a as a flow path of air for detecting the amount of dust.

The sensor cover 512 further includes a sensor suction portion 513 into which air is sucked via a sensor coupling portion 520, which will be described later. The sensor suction part 513 is disposed below the sensor cover 512, and may be configured to penetrate through the back surface of the sensor cover 512.

A heater 517 may be disposed at one side of the sensor suction part 513. The heater 517 performs a function of raising the ambient air temperature of the sensor suction part 513. When the heater 517 is driven, the temperature around the sensor suction portion 513 rises and the density decreases, whereby the pressure decreases.

A sensor discharge portion 514 for discharging air may be formed above the sensor flow path 512 a. The sensor discharge portion 514 may be formed to penetrate the rear surface of the sensor cover 512. That is, the sensor discharge portion 514 is disposed above the sensor suction portion 513.

Further, optical transmission/ reception units 518 and 519 may be disposed on both sides of the sensor flow path 512 a. The light transmitting/receiving units 518 and 519 include a light emitting unit 518 disposed on one side of the sensor flow path 512a and used for emitting light. For example, the Light Emitting part 518 may include a Light Emitting Diode (LED).

The light transmitting/receiving units 518 and 519 include a light receiving unit 519 disposed on the other side of the sensor flow path 512a, and when the light E1 irradiated from the light emitting unit 518 acts on the air P1 flowing through the sensor flow path 512a, the light receiving unit 519 detects the sensitivity of the light E2 scattered by the dust contained in the air. As an example, the light receiving portion 519 may include a Photodiode detector (photo detector). The larger the amount of dust contained in the air, the lower the sensitivity of the light received by the light receiving section 519, and the larger the output voltage value can be. That is, the sensitivity of light may be inversely proportional to the output voltage value.

In addition, the sensor cover 512 includes a cleaning aperture 516 that is accessible to a user for cleaning the dust sensor 500. The cleaning hole 516 is formed by opening at least a part of the rear surface of the sensor cover 512. A through hole 521 of the sensor coupling portion 520 is disposed behind the cleaning hole 516, and the rear of the through hole 521 may be covered with a sensor cover 530 described later. That is, the cleaning hole 516 and the through hole 521 may communicate.

In addition, the dust sensor 500 further includes a sensor coupling part 520 coupled to the sensor body 510. The sensor coupling portion 520 may function as a passage for guiding the outside indoor air to the sensor suction portion 513.

In the present embodiment, the sensor coupling portion 520 is provided on the inner surface of the rear panel 107. When the rear panel 107 is coupled to the rear side of the case cover 430, the sensor coupling part 520 may be coupled or connected to the sensor body 510. At this time, the through hole 521 of the sensor coupling part 520 may communicate with the sensor suction part 513 and the cleaning hole 516.

The through hole 521 may be formed to penetrate through the front surface and the rear surface of the sensor coupling part 520. Accordingly, the indoor air flowing in through the rear portion of the through hole 521 may be guided to the sensor suction part 513 after flowing through the through hole 521. The through hole 521 may be understood as a sensor proximity hole for proximity to the sensor body 510.

In addition, a rear portion of the through hole 521 may be covered by a sensor cover 530. For this, a hooking coupling portion (not shown) may be formed at a rear surface portion of the sensor coupling portion 520 so that the sensor cover 530 may be detachably hooked thereto. The hook coupling portion includes a coupling groove. Accordingly, a hook (not shown) of the sensor cover 530 may be hook-coupled to the coupling groove of the hook coupling portion.

In addition, the dust sensor 500 further includes a sensor cover 530 coupled to the rear of the sensor coupling portion 520. The sensor cover 530 includes a grill portion 531 for sucking air to the inside of the dust sensor 500 and discharging the air inside the dust sensor 500 to the outside.

The grill portion 531 penetrates the back surface of the sensor cover 530. The grill portion 531 communicates with a through hole 521 formed at the sensor coupling portion 520.

Therefore, the indoor air sucked into the grill part 531 may be sucked into the sensor suction part 513 of the sensor cover 512 after passing through the through hole 521 of the sensor coupling part 520. The air discharged to the sensor discharge portion 514 of the sensor cover 512 may flow through the through hole 521 of the sensor coupling portion 520 and be discharged to the outside through the grill portion 531.

The sensor cover 530 further includes a hook (not shown) coupled to a hook coupling portion formed at the sensor coupling portion 520. The hook may include: a hanging part (not shown) inserted into the hook coupling part; and a grip portion (not shown) that can be gripped by a user. For example, the holding portion may extend upward from the hanging portion.

According to such a structure, when the user separates the sensor cover 530 from the sensor coupling part 520, the cleaning hole 516 may be exposed to the outside through the through hole 521. Thus, the user can clean the dust sensor 500 by approaching the sensor body 510 through the through hole 521 and the cleaning hole 516.

That is, the user can easily clean foreign substances such as dust accumulated in the sensor body 510 by separating the sensor cover 530 to approach the cleaning hole 516 without separating the sensor coupling part 520 or the rear panel 107.

In addition, the plurality of sensors 500, 550, 560 may further include a gas sensor 550 for detecting a concentration of a pollutant contained in the indoor air. The gas sensor 550 is disposed at a side of the housing cover 430. For example, the gas sensor 550 may be disposed at a side of the dust sensor 500.

In detail, the gas sensor 550 is mounted in the sensor mounting space 441a provided on the rear surface of the sensor holder 440, so that the concentration of the pollutants contained in the indoor air can be detected by the rear panel 107 coupled to the rear side of the case cover 430. At this time, the rear panel 107 covers the gas sensor 550 so as not to be exposed to the outside.

The gas sensor 550 may include: a sensor portion 551 for detecting the concentration of pollutants in the air; and a sensor substrate 552 provided with the sensor portion 551.

The sensor substrate 552 is provided with a space for mounting the sensor portion 551. The sensor substrate 552 is formed in a substantially rectangular plate shape and can be seated in the sensor mounting space 441 a.

In addition, the plurality of sensors 500, 550, 560 may further include a humidity sensor 560 for detecting humidity of indoor air. The humidity sensor 560 is disposed at a side of the case cover 430. For example, the humidity sensor 560 may be disposed below the gas sensor 550.

The humidity sensor 560 is mounted in a sensor mounting space 441a provided in the rear surface of the sensor holder 440, and can detect the humidity of the indoor air by the rear panel 107 coupled to the rear side of the case cover 430. At this time, the rear panel 107 covers the humidity sensor 560 so as not to be exposed to the outside.

The humidity sensor 560 includes: a sensor portion 561 for detecting moisture in the air; and a sensor substrate 562 on which the sensor portion 561 is provided.

The sensor substrate 562 is provided with a space for mounting the sensor part 561. The sensor substrate 562 is formed in a substantially rectangular plate shape, and may be disposed in the sensor mounting space 441 a.

As described above, the dust sensor 500, the gas sensor 550, and the humidity sensor 560 may be densely arranged in the space where the air flow is not easily formed in the housing cover 430, that is, the outer side surface of the housing cover 430. Therefore, it is possible to secure an installation space for installing the plurality of sensors, and the plurality of sensors are collectively arranged at one place, thereby providing an effect of facilitating management of the sensors.

Furthermore, the through hole 446 is provided between the sensor holder 440 provided with the plurality of sensors 500, 550, 560 and the guide plates 432, 433, 434.

That is, since the plurality of sensors are separated from the second discharge flow path 430b (see fig. 14) through the through hole 446, the plurality of sensors can be prevented from being affected by the air flow in the second discharge flow path 430 b. Therefore, the sensing sensitivity of the plurality of sensors can be improved.

In addition, the plurality of sensors 500, 550, 560 are covered by the rear panel 107 without being exposed to the outside, and thus, the appearance of the product can be made neat. When the rear panel 107 is separated, all of the plurality of sensors 500, 550, 560 may be exposed to the outside, and thus, in the case where a failure occurs in a part of the plurality of sensors 500, 550, 560, the sensor having the failure can be replaced or repaired only by separating the rear panel 107, and thus, there is an effect that maintenance and management of the sensor are easy.

In addition, the humidifying air purifier 10 further includes a sensor charging device 800 provided to the housing cover 430. The sensor charging apparatus 800 may be understood as an apparatus that supplies power to at least one or all of the dust sensor 500, the gas sensor 550, and the humidity sensor 560.

In detail, the sensor charging device 800 includes a plurality of components for charging, i.e., a charging device housing 810 in which a charging module is built.

The charging device cover 810 has a substantially hexahedral shape, and is disposed on a rear surface of the sensor holder 440. Specifically, the charging device cover 810 is provided on the rear surface of the first support portion 443 that supports the sensor holder 440.

In this case, the charging device cover 810 may protrude rearward of the housing cover 430 in comparison with the plurality of sensors 500, 550, and 560 provided in the sensor holder 440.

In other words, the face where the charging device cover 810 is provided may be more protruded than the face where the plurality of sensors 500, 550, 560 are provided. The charging device cover 810 may be exposed to the outside through the rear panel 107.

In addition, the charging device cover 810 includes a plug insertion hole 812 for inserting an external charging plug. The plug insertion hole 812 may be understood as a portion where a plug connected to an external power supply (not shown) is electrically connected to the charging device cover 810.

For example, the plug insertion hole 812 may be formed in an upper side surface portion of the charging device cover 810. That is, the plug insertion hole 812 may be formed to be recessed downward from an upper side surface portion of the charging device cover 810.

In addition, the charging device cover 810 may further include a connection part 814 for fastening the charging device cover 810 to the sensor bracket 440. For example, the connection parts 814 may be respectively extended from both sides of the charging device cover 810. The connection portion 814 may be fastened to a charging device fastening portion 443a (refer to fig. 24) provided in the first support portion 443 by a fastening member.

In addition, the sensor charging device 800 further includes a charging device cover 820 coupled to the charging device housing 810. For example, the charging device cover 820 may have a hexahedral shape with an open front surface.

The charging device cover 820 functions to prevent the charging device case 810 from being exposed to the outside through the rear panel 107. For this, the charging device cover 820 may be disposed at an area of the rear panel 107 exposed by the charging device case 810. That is, the charging device cover 820 may be provided on the rear surface of the rear panel 107 so as to cover the opening 107a formed in the rear panel 107. At this time, the charging device cover 820 is detachably provided to the rear surface of the rear panel 107.

The summary is as follows: the charging device cover 810 is exposed to the outside through the opening 107a of the rear panel 107, and the exposed charging device cover 810 can be selectively covered by the charging device cover 820.

In addition, a plug through hole 821 for passing an external charging plug is formed in the charging device cover 820. The plug through hole 821 may be understood as a portion for electrically connecting a charging plug with the charging device cover 810 located inside the charging device cover 820.

For example, the plug insertion hole 821 may be provided on an upper side surface of the charging cover 820. The plug through hole 821 may be formed by cutting a part of the upper side surface of the charging device cover 820. The plug insertion hole 812 of the charging device cover 810 may be exposed through the plug through hole 821. That is, the plug through hole 821 and the plug insertion hole 812 may be oppositely disposed and communicate with each other.

Accordingly, the user can supply power to the sensor charging device 800 by inserting a plug into the plug insertion hole 812 through the plug insertion hole 821. Thereby, the sensor charging device 800 may supply the power supplied through the plug to at least one or all of the dust sensor 500, the gas sensor 550, and the humidity sensor 560.

The plug through hole 821 may be provided with a foreign matter prevention portion (not shown) for preventing foreign matter such as dust or moisture from entering. For example, the foreign matter prevention part may be formed of an elastic material such as rubber, and may be disposed inside the plug through hole 821. The foreign matter prevention portion may be configured to selectively open and close the plug through hole 821. According to such a structure, a user can easily approach the sensor charging device 800 through the charging device cover 820. Therefore, the plurality of sensors can be easily charged.

In addition, the rear panel 107 may cover the rear side of the case cover 430. That is, the rear panel 107 may be regarded as a structure located at the rearmost of the humidifying air purifier 10.

In detail, the rear panel 107 may include a plate portion disposed at a rear side of the housing cover 430.

The plate portion may have a rectangular plate shape. The plate portion is coupled to the rear side of the housing cover 430, thereby covering the plurality of sensors 500, 550, 560, the sensor charging device 800, and the like.

An opening 107a through which the sensor charging device 800 passes may be formed in the plate portion. The opening portion 107a may be formed in a shape corresponding to the shape of the sensor charging device 800.

When the rear panel 107 is coupled to the housing cover 430, at least a portion of the sensor charging device 800 may be exposed to the outside through the opening 107 a.

The exposed sensor charging device 800 may be shielded by the charging device cover 820.

The rear panel 107 may further include a panel fastening portion 107b fastened to the rear side of the case cover 430 by a fastening member. The plate fastening portion 107b is fastened to the fastening portion 438a of the housing cover 430 by a fastening member, thereby being fixed to the housing cover 430. The plate fastening portion 107b may be formed on the front surface of the plate portion.

The rear panel 107 may be further formed with an insertion portion 107c formed to protrude forward for insertion into the main body frame 110, a support rib 107d for fixing or supporting the insertion portion 107c, and a maintenance groove 107e formed with a groove at a lower end portion.

The insertion portions 107c may be provided on both sides of the lower end portion of the rear panel 107. The insertion portion 107c may be formed to protrude forward and inserted into the lower end of the main body frame 110. Thus, the rear panel 107 can be coupled to the rear of the main body frame 110.

The support rib 107d may extend forward from the rear panel 107 to fixedly support the insertion portion 107 c.

In addition, the support rib 107d may also function as a coupling bracket coupled to the housing cover 430. In this case, the coupling brackets may be disposed at upper and lower portions of the plate portion.

In order to facilitate the movement of the humidifying air purifier 10, the maintenance groove 107e may be formed to be recessed upward from the lower end of the rear panel 107.

The rear panel 107 may be provided with a discharge portion 109 for discharging filtered and humidified air, and a non-discharge portion 109A located on one side of the discharge portion 109 and not discharging air.

Specifically, the upper portion of the rear panel 107 may be bent

And (4) shaping. The upper portion of the rear panel 107 may extend forward. That is, the upper side of the rear panel 107 may be formed.

The upper surface of the rear panel 107 may be formed with open portions 109 and 109A formed to vertically penetrate therethrough.

The opening portions 109, 109A may be understood as openings defined by the discharge portion 109 and the non-discharge portion 109A described above.

The discharge portion 109 may face the second discharge flow path 430b of the housing cover 430 (see fig. 16) in the vertical direction, and the non-discharge portion 109A may face the extension plate 436 in the vertical direction.

A space between the second guide 433 and the third guide 434 in the vertical direction in the opening portions 109 and 109A forms the discharge portion 109. That is, the portion of the opening portions 109 and 109A facing the second discharge flow path 430b may be the discharge portion 109, and the portion facing the extension plate 436 may be the non-discharge portion 109A.

The area of the discharge portion 109 may be larger than the area of the non-discharge portion 109A.

The discharge portion 109 may be formed so that the second discharge channel 430b communicates with the discharge port.

The discharge portion 109 may guide the air passing through the case assembly 400 to be discharged to the outside.

That is, when the rear panel 107 is coupled to the rear side of the housing cover 430, the discharge portion 109 may be positioned at the upper end of the housing cover 430. That is, the discharge portion 109 is located above the second discharge channel 430 b.

The rear panel 107 may further include a discharge grill 170 for guiding a discharge direction of air passing through the discharge portion 109.

The discharge grill 170 may cover the open portions 109 and 109A from above. That is, the discharge grill 170 may cover the open end 431a of the housing cover 430 and the extension plate 436.

Specifically, a part of the discharge grill 170 may cover the discharge portion 109, and another part may cover the non-discharge portion 109A. That is, a part of the discharge grill 170 may face the second discharge channel 430b in the vertical direction, and another part may face the extension plate 436 in the vertical direction.

The rear panel 107 may further include a grill mounting groove 107f provided with a discharge grill 170. The grill mounting groove 107f may be formed to be recessed downward from the upper surface of the rear side panel 107. The discharge grill 170 may be installed in the grill installation groove 107 f.

The grill mounting groove 107f may be formed to be depressed downward such that the upper end of the grill guide 175 is positioned at the same height as the upper end of the upper side panel 105. That is, the upper end of the discharge grill 170 provided in the grill mounting groove 107f may be formed as a plane parallel to the upper end of the upper side plate 105.

The grill mounting groove 107f may be defined as a groove formed along an opening on an upper side of the rear panel 107.

The grill mounting groove 107f may form a step with the upper surface of the rear panel 107. The grill mounting groove 107f may be located at an edge of the opening 109, 109A. For example, the discharge grill 170 may be installed in the grill installation groove 107 f.

Fig. 30 is an enlarged view showing a part of the structure of the rear panel according to the embodiment of the present invention.

The spit-out grill 170 may include: a peripheral frame disposed along the grill installation groove 107 f; and a grill guide 175 that guides a flow direction of the air passing through the discharge portion 109.

That is, the grill guide 175 may be positioned above the discharge portion 109. The grill guide 175 may form a frame extending in a longitudinal direction of an upper side of the rear panel 107.

The plurality of grill guides 175 may be disposed at predetermined intervals in an inner space formed by the peripheral frame. For example, the grill guides 175 may be arranged in a plurality at intervals in the front-rear direction.

Therefore, the discharge portion 109 and the outside can communicate with each other through the plurality of grill guides 175. As a result, the air discharged to the discharge portion 109 can flow between the plurality of grill guides 175 and be discharged along the extending direction of the grill guides 175.

That is, the grill guide 175 may guide the flow direction of the discharged air.

The grill guide 175 may extend from the upper surface of the rear panel 107 to be inclined upward by a predetermined angle θ_A. That is, the grill guide 175 may be formed to be inclined in a forward direction.

That is, the grill guide 175 may be maintained at a predetermined angle with respect to an imaginary vertical line.

The grill guide 175 may extend upward from the peripheral frame. The grill guide 175 may extend to be inclined more forward than the upper end.

Specifically, the grill guide 175 may define an extension reference line DH, which is a virtual vertical line parallel to the vertical reference line D (see fig. 14), and an extension start point OH located at either side end of the grill mounting groove 107 f.

The extension reference line DH and the extension starting point OH may intersect at a lower end of the grill guide 175.

That is, the extension reference line DH and the extension starting point OH may be extended upward to be inclined forward of the grill guide 175 by a predetermined angle θ_A。

Wherein a horizontal line drawn along the side end portion of the grill installation groove 107f may be parallel to the ground.

In other words, the grill guide 175 may extend to be inclined upward toward the upper side panel 105.

That is, the discharge grill 170 may be extended such that the upper end is inclined toward the door assembly 200 to guide the air passing through the discharge portion 109 forward.

Accordingly, when the humidifying air purifier 10 is disposed with the rear panel 107 in close contact with the indoor wall surface, the air discharged through the discharge portion 109 is advantageously discharged in the indoor direction opposite to the wall surface direction.

Fig. 31A and 31B are experimental diagrams comparing and showing the flow of the discharge air according to the inclination of the grill guide of the discharge grill according to the embodiment of the present invention.

Specifically, fig. 31A is an experimental view showing the flow distribution of the discharge air passing through the discharge portion 109 when the grill guide 175 extends in the vertical direction along the extension reference line DH, and fig. 31B is an experimental view showing the grill guide 175 extending from the extension reference line DH to be inclined at a predetermined angle θ_AAn experimental diagram of the flow distribution of the discharge air passing through the discharge portion 109.

The humidifying air purifier of the present embodiment is a furniture type humidifying air purifier that can function as furniture such as a bookcase and a desk, and therefore can be disposed near a wall surface similarly to furniture that is generally disposed in an indoor space.

Referring to fig. 31A, it can be confirmed that the air discharged from the discharge portion 109 of the humidified air purifier 10 disposed from the rear panel 107 toward the wall surface W forms an air flow directly and widely impinging on the wall surface W.

Referring to fig. 31B, it can be confirmed that the air discharged from the discharge portion 109 is discharged to the indoor space on the opposite surface of the wall surface W by the grill guide 175 inclined forward, and thus the air flow directly colliding with the wall surface W can be minimized.

That is, the flow of the air discharged from the humidified air purifier 10 by the discharge grill 170 extending obliquely forward can be guided away from the indoor wall surface.

Therefore, the wallpaper has the advantage of preventing the discharged air containing moisture from generating color change, damage, mold and the like due to the collision with the wallpaper. That is, since the wallpaper can be prevented from being contaminated, there is an advantage that the indoor space environment can be maintained cleanly.

Fig. 32 is a sectional view showing the flow of air in the humidified air purifier of the present invention.

Referring to fig. 32, the flow of air in the humidifying air purifier 10 according to the embodiment of the present invention is explained.

First, when the blower fan 480 is driven, air outside the humidified air purifier 10 is sucked into the suction port 225 via the recess 30. The air sucked into the suction port 225 flows upward and flows into the drawer 220.

The air will pass through the air filter assembly 280. Since the air filter unit 280 is disposed in a state of being seated in the air filter seating portion 226 while being inclined forward, air can uniformly pass through the filter surface of the air filter unit 280.

The air filtered at the air filter assembly 280 flows in a backward direction and then passes through the humidifying filter assembly 300. The air is humidified while passing through the humidification filter assembly 300, and the humidified air passes through the supply fan 480.

As described above, since the air filter assembly 280, the water tub 260, and the humidification filter assembly 300 are sequentially disposed from the front to the rear of the drawer 220, air can be easily filtered and humidified.

The air is sucked in the axial direction of the blower fan 480 and discharged in the radial direction. The air passing through the blower fan 480 flows upward, and is discharged to the outside through the discharge unit 109.

That is, since the air is sucked into the lower front portion of the humidified air cleaner 10 and discharged to the upper rear portion, the flow resistance is reduced, and the air blowing performance can be improved.

By observing the internal flow path of the air passing through the casing assembly 400, an internal flow path can be formed which flows into the axial direction of the blower fan 480 and discharges the air upward toward the discharge portion 109.

The internal flow path is described in detail as follows: the air flowing in from the rotational axis direction of the blower fan 480 is discharged in the radial direction of the blower fan 480, and can flow toward the discharge portion 109 along the flow path having the spiral shape by being guided by the fan cover 410 and the casing cover 430.

Fig. 33 is a schematic diagram showing a part of the structure of the humidifying air purifier according to the embodiment of the present invention, and fig. 34 is a schematic diagram showing the flow of air in the humidifying air purifier according to the embodiment of the present invention.

Referring to fig. 33 and 34, a humidified air purifier 10 according to an embodiment of the present invention is characterized in that an air filter 285, a humidification filter 330, and a blower fan 480 are arranged in a row at intervals.

Specifically, the air filter 285 is disposed in a front portion of the humidifying air purifier 10, and the blower fan 480 is disposed in a rear portion of the humidifying air purifier 10. The humidification filter 330 is disposed in a space between the air filter 285 and the blower fan 480.

In the present invention, the reason why the humidification filter 330 is disposed in the space between the air filter 285 and the blower fan 480 is to easily humidify air.

That is, since the humidification filter 330 is located downstream of the air filter 285 and upstream of the blower fan 480, the air passing through the air filter 285 can be quickly discharged to the outside through the blower fan 480 while containing moisture.

Unlike the present invention, if the humidification filter 330 is located at the downstream side of the air supply fan 480, the air passing through the air filter 285 and the air supply fan 480 continuously has a relatively small flow rate after passing through the humidification filter 330. When the flow rate is small, the time for discharging the air containing moisture to the outside becomes long, and as a result, the time for evaporating the moisture in the air increases.

The air filter 285 may be disposed to face the humidification filter 330, and the humidification filter 330 may be disposed to face the blower fan 480. At this time, a distance L1 between the air filter 285 and the humidification filter 330 is greater than a distance L2 between the humidification filter 330 and the blower fan 480.

The interval L1 between the air filter 285 and the humidification filter 330 may be an interval between any points of the air filter 285 and the humidification filter 330 in the front-rear horizontal direction. The interval L2 between the humidification filter 330 and the blower fan 480 may be an interval between any point of the humidification filter 330 and the blower fan 480 in the front-rear horizontal direction.

That is, the humidification filter 330 is positioned closer to the blower fan 480 than the air filter 285, and thus, the air containing moisture can be assisted in being rapidly discharged to the outside by the blower fan 480.

The air filter 285, the humidification filter 330, and the air-supply fan 480 may be arranged in this order at intervals along the axial direction of a fan motor 483 (see fig. 32) of the air-supply fan 480.

In detail, the air filter 285, the humidification filter 330, and the blower fan 480 are understood to be structures that must actually pass through the room air for filtering and humidifying the room air. Therefore, if the air filter 285, the humidification filter 330, and the blower fan 480 are arranged in a row, the air flow direction is linear.

That is, the air sucked into the humidified air cleaner 10 moves linearly, and thus can rapidly pass through the air filter 285, the humidification filter 330, and the blower fan 480. Accordingly, the air sucked into the humidified air purifier 10 can flow backward and sequentially pass through the air filter 285, the humidification filter 330, and the blower fan 480, and thus the air filtering and humidifying effect can be improved.

Further, a height H1 from the door bottom portion 224 to the upper end of the air filter 285 may be formed to be higher than a height H2 from the door bottom portion 224 to the upper end of the humidification filter 330. That is, the air filter 285 can improve air filtering performance by forming the entire height of the air filter 285 to be high.

On the other hand, since the humidifying filter 330 can sufficiently exhibit the humidifying performance even if it is formed to have a height lower than the entire height of the air filter 285, the humidifying filter 330 may be formed to have a height lower than the height of the air filter 285.

Further, the height H3 from the door bottom surface portion 224 to the upper end portion of the blower fan 480 is set to be lower than the height H2 of the humidification filter 330, whereby the air passing through the humidification filter 330 can be discharged to the outside as quickly as possible.

In addition, a height T1 from the door bottom 224 to the lower end of the air filter 285 may be higher than a height T2 from the door bottom 224 to the lower end of the humidification filter 330. This is so that the humidifying filter 330 should be sufficiently submerged to be stored in the water tank 260.

A height T3 from the door bottom 224 to the lower end of the blower fan 480 may be higher than a height T1 of the lower end of the air filter 285. With this configuration, the air passing through the air filter 285 can be moved linearly without changing its direction, and thus can be quickly introduced into the suction side of the blower fan 480.

In the air flow path, an intake flow path S1 may be formed on the intake side of the air filter 285, a first intermediate flow path S2 may be formed between the air filter 285 and the humidification filter 330, a second intermediate flow path S3 may be formed between the humidification filter 330 and the blower fan 480, and a discharge flow path S4 may be formed in the case cover 430 corresponding to the discharge side of the blower fan 480.

The suction flow path S1 is understood as a suction flow path of the air filter 285, and may extend in the vertical direction. The suction flow paths S1 may be formed differently from each other with respect to the vertical direction. For example, the lower width of the suction channel S1 may be formed to be greater than the upper width of the suction channel S1. Such a difference in the flow path width is due to the configuration in which the upper portion of the air filter 285 is disposed obliquely forward.

The first intermediate flow path S2 may be formed at an upper side of the water tank 270. The first intermediate flow path S2 is understood to be a suction flow path of the humidification filter 330, and may extend in the front-rear direction. The front-rear direction length of the first intermediate flow path S2 may be formed to be greater than the front-rear direction length of the suction flow path S1.

The second intermediate flow path S3 is understood to be a suction flow path of the blower fan 480 and may extend in the front-rear direction. The air flowing through the second intermediate flow path S3 may flow into the axial direction of the blower fan 480. The front-rear direction length of the second intermediate flow path S3 may be formed to be smaller than the front-rear direction length of the first intermediate flow path S2.

The discharge flow path S4 may be understood as a discharge flow path of the blower fan 480. The discharge flow path S4 may be formed in a space where the blower fan 480 is provided, that is, a space formed by the fan cover 410 and the casing cover 430. The air flowing through the discharge flow path S4 can be discharged upward through the discharge portion 109. The discharge flow path S4 may include the first discharge flow path 430a (see fig. 14) and the second discharge flow path 430b (see fig. 14) as described above.

As described above, since the air filter assembly 280, the water tub 260, and the humidification filter assembly 300 are sequentially disposed rearward from the front portion of the drawer 220, air can be easily filtered and humidified.

Fig. 35 is a front view showing a case cover according to another embodiment of the present invention, fig. 36 is a view showing a cut-off portion of the case cover shown in fig. 35 in an enlarged manner, fig. 37A is a perspective view showing the case cover appearing as a comparative example, fig. 37B is a perspective view showing a case cover according to another embodiment of the present invention, fig. 38A is a view showing a cut-off portion outline of the case cover appearing as a comparative example, and fig. 38B is a view showing a cut-off portion outline of the case cover according to another embodiment of the present invention.

In detail, fig. 35 is a diagram in which the sensor holder 440 is omitted for convenience of explanation.

Since the other embodiment described below is the same as the embodiment described above except for the structure of the case cover, the overlapping contents will be omitted and the description will be given centering on the difference.

The first guide 432 may be formed to be distant from the cut-off portion 435 in the flow direction of the air from the air supply fan 480. In detail, the first guide 432 may have a volute shape with a distance gradually increasing from an outer circumference of the impeller 485 in a circumferential direction.

The first guide 432 may be formed between the reference angle point (k is 0 ° or 360 °) and the cut-off portion 435 with the reference point O as a center. Here, the reference angle point (k — 0 ° or 360 °) may be a point at which the first guide 432 and the second guide 433 intersect.

The cut-off portion 435 may be located in the vicinity of approximately 90 ° in the rotation direction (e.g., clockwise direction) of the impeller 485. The rotation center of the impeller 485 may be arranged to overlap the cutoff portion 435 when viewed in the direction of 90 °.

The first guide 432 may be formed in an arc shape along a direction orthogonal to the rotation center axis of the impeller 485 through the entirety or a part from the cutoff portion 435 to the reference angle point (k is 0 ° or 360 °).

The closer the cutoff portion 435 is to the reference angle point (k is 0 ° or 360 °) along the rotation direction of the impeller 485, the smaller the curvature of the first guide 432 and the larger the radius of curvature.

A first discharge flow path 430a through which air discharged in the radial direction from the impeller 485 flows may be formed between the inner surface of the first guide 432 and the outer surface of the impeller 485.

The flow cross-sectional area of the first discharge flow path 430a may gradually increase along the rotation direction of the impeller 485. That is, the distance between the inner surface of the first guide 432 and the outer surface of the impeller 485 may be gradually increased in the rotation direction of the impeller 485.

Here, the outer surface of the impeller 485 may be understood as an outer circumferential surface located at the farthest distance in the radial direction from the center of the impeller 485. Therefore, the outer surface of the impeller 485 may be referred to as the outer circumference of the blower fan 480 or the outer end of the blower fan 480.

The distance between the inner surface of the first guide 432 and the outer surface of the impeller 485 may be referred to as the discharge flow path inner width.

The discharge flow path inner width cf1 between the cutting unit 435 and the point where k is 180 ° may be formed narrower than the discharge flow path inner width cf2 between the point where k is 180 ° and the point where k is 270 °.

The third guide 434 may extend from the cut-off portion 435 provided at one side of the first guide 432, and the second guide 433 may extend from the other side of the first guide 432.

In detail, the third guide 434 and the second guide 433 may extend away from the impeller 485, for example, substantially upward.

A second discharge channel 430b may be formed between the third guide 434 and the second guide 433. The second discharge channel 430b is connected to the first discharge channel 430 a.

The third guide 434 and the second guide 433 may be configured to be distant from each other in a flow direction of the air. Therefore, the flow cross-sectional area of the second ejection flow path 430b can be gradually increased along the air flow direction.

The cutoff portion 435 may be located between the first guide 432 and the third guide 434, and may be formed to protrude toward the second discharge flow path 430 b.

The cut-off portion 435 may be spaced apart from the outer surface of the impeller 485 to form a gap.

When the gap is too large, a part of the air flowing from the first discharge channel 430a to the discharge channel 433b can be sucked into the gap again. The re-suction is defined as a back flow phenomenon. When the backflow occurs, the performance of the blower fan 480 can be reduced.

In contrast, when the gap is too small, the flow pressure can be concentrated at the end of the cutoff portion 435. Therefore, the flow noise becomes relatively large. Therefore, the gap needs to be appropriately adjusted.

For example, the minimum distance G between the cutting unit 435 and the outer surface of the impeller 485 is preferably 8% to 10% of the diameter G of the impeller 485.

In other words, the minimum distance G between the first connection portion 702 and the outer periphery of the impeller 485, which will be described later, is preferably 8% to 10% of the diameter G of the impeller 485. The minimum distance g between the first connection portion 702 and the outer circumference of the impeller 485 may be named a cut-off portion gap.

Referring to fig. 37A and 38A, the cut-out portion 435' of the conventional case cover is formed in an arc shape with respect to the longitudinal direction (hereinafter, first direction) and is formed flat without being formed in an arc shape with respect to the width direction (hereinafter, second direction).

That is, the conventional cutting unit 435' has a predetermined curvature with respect to the first direction, but has a curvature of 0 with respect to the second direction.

Wherein the first direction may be a direction connecting the first guide 432 and the third guide 434. The second direction may be defined as a direction connecting the front end and the rear end of the cutting unit 435.

On the other hand, referring to fig. 37B and 38B, the cut-off portion 435 of the case cover 430 according to the embodiment of the present invention may be formed not only in an arc shape with respect to the first direction, but also in an arc shape with respect to at least a portion of the second direction.

This can reduce noise generated when a part of the air flowing from the first discharge flow path 430a to the second discharge flow path 430b collides with the end of the blocking unit 435.

The structure of the cutting unit 435 will be described in detail below.

The cutoff part 435 may include: a first connection 702 connecting the profile 701 with the first guide 432; and a second connection portion 703 connecting the outline 701 and the third guide 434.

The contour 701 may be an end of the cutting unit 435, and more specifically, may be a contour of a portion of the cutting unit 435 that protrudes most in the direction of the discharge channel 433 b.

At least a portion of the contour 701 of the cut-off portion 435 may be formed in an arc shape with respect to the second direction.

Referring to fig. 38A, the contour 701' of the cut-off portion of the conventional case cover may have a linear shape with respect to the second direction. On the other hand, referring to fig. 38B, the contour 701 of the cut-off portion 435 of the case cover 430 according to the embodiment of the present invention may be formed such that at least a portion thereof has a predetermined curvature with respect to the second direction.

The flow rate of the air colliding with the contour 701 of the cutoff part 435 may be different according to the position with respect to the second direction. That is, the flow velocity distribution may be different at each position in the profile of the cutoff portion 435. For example, the flow rate of air at a point adjacent to the cover 431 may be slower than the flow rate of air at a point adjacent to the fan cover 410 (see fig. 12).

The contour 701 of the cut-off portion 435 of the case cover 430 of the present embodiment may be formed to correspond to the flow velocity distribution at each position described above.

In detail, the profile 701 of the cut-off portion 435 may include: a linear portion 704 connected to the cover 431 in an inclined manner; and an arc portion 705 extending from the straight portion 704 and connected to the fan case 410.

The straight line portion 704 may be formed long in a direction inclined with respect to the second direction. An angle α 1 formed by the outer end of the straight portion 704 and the cover 431 may be an obtuse angle.

On the other hand, the arc 705 may be formed in an arc shape so as to have a predetermined curvature with respect to the second direction. The arc 705 may be convexly formed toward the fan cover 410.

The angle α 2 formed by the fan cover 410 and the outer side end of the arc 705 may be an acute angle. Here, the angle α 2 may be an angle formed by a tangent t of an end of the arc 705 connected to the fan housing 410 and the fan housing 410.

The length Y3 of the straight portion 704 with respect to the second direction may be half of the distance Y1 between the cover plate 431 and the fan cover 410.

In addition, the length Y2 of the arc part 705 with respect to the second direction may be half of the distance Y1 between the cover plate 431 and the fan cover 410.

At this time, the distance Y1 between the cover plate 431 and the fan cover 410 may be a length Y1 of the contour 701 with respect to the second direction.

In detail, a point forming a boundary between the straight portion 704 and the arc portion 705 may be referred to as an inflection point 506. The distance Y3 between the cover plate 431 and the inflection point 506 may be half of the distance Y1 between the cover plate 431 and the fan cover 410 with respect to the second direction.

Likewise, with respect to the second direction, the distance Y2 between the fan cover 410 and the inflection point 506 may be half the distance Y1 between the cover plate 431 and the fan cover 410.

That is, with respect to the second direction, a distance Y3 between the cover plate 431 and the inflection point 506 may be the same as a distance Y2 between the fan case 410 and the inflection point 506.

Further, the cut-off portion 435 may be formed in an arc shape with respect to the first direction. Accordingly, the third guide 434 may be formed to extend in a direction opposite to one side end of the first guide 432.

The cut-out 435 may have a maximum curvature in the profile 701 with respect to the first direction.

In detail, the curvature of the first connection portion 702 with respect to the first direction and the curvature of the second connection portion 703 with respect to the first direction are respectively larger closer to the profile 701 and converge at the maximum curvature.

The maximum curvature is preferably 5% of the diameter G of the impeller 485.

The maximum curvature may be maintained constant along the profile 701. That is, the curvature with respect to the first direction at the linear portion 704 may be the same as the curvature with respect to the first direction at the arc portion 705.

Further, the first connection portion 702 and the second connection portion 703 may include three-dimensional curved surfaces, respectively. Wherein the three-dimensional curved surface is a curved surface having a prescribed curvature with respect to the first direction and the second direction. Therefore, the three-dimensional curved surface may also be referred to as a free-form surface.

Hereinafter, the noise reduction effect by the structure of the cutting unit 435 will be described through an experimental diagram.

Fig. 39 is a diagram showing changes in the air volume and noise of the blower fan provided in the conventional casing cover and the blower fan provided in the casing cover according to another embodiment of the present invention.

Referring to fig. 39, it can be confirmed that the conventional blower fan a generates more noise than the blower fan b of the present embodiment with respect to all the air volumes.

In particular, when the conventional blower fan a had an air volume of 3.7CMM, 34.3dB of noise was measured, and when the blower fan b of the present example had an air volume of 3.7CMM, 32.0dB of noise was measured, and a noise reduction effect of 2.3dB at maximum was confirmed.

Fig. 40A is a diagram illustrating an operation frequency and a noise change of a blower fan provided in a conventional casing cover as a comparative example. Fig. 40B is a diagram showing changes in the operating frequency and noise of the blower fan provided in the casing cover according to another embodiment of the present invention.

Referring to fig. 40A and 40B, it can be confirmed that noise at a specific frequency generated by the conventional blower fan is reduced in the blower fan of the present embodiment.

More specifically, in the conventional blower fan, a first noise peak P1 of 20dB corresponding to a first frequency between 500Hz and 1000Hz was measured, and a second noise peak P2 of 0dB corresponding to a second frequency between 1500Hz and 2000Hz was measured.

On the other hand, in the blower fan of the present embodiment, the third noise peak P3 of less than 10dB corresponding to the first frequency is measured, and the fourth noise peak P4 of less than-10 dB corresponding to the second frequency is measured. That is, it was confirmed that the noise was significantly reduced at both the first frequency and the second frequency.

Fig. 41A is a diagram illustrating a profile of a cut-off portion of a case cover appearing as a comparative example, fig. 41B to 41D are diagrams illustrating a profile of a cut-off portion of a case cover according to another embodiment of the present invention according to a position of an inflection point, and fig. 42 is a diagram illustrating changes in air volume and noise of the blower fan provided in each of the case covers illustrated in fig. 41A to 41D.

The contour 701 'of the cut-off portion 435' shown in fig. 41A has a vertical line shape.

An inflection point 706 may be provided at a point 20% of the height of the contour 701 of the cutoff portion 435 shown in fig. 41B. That is, the height of straight portion 704 (0.2 × Y1) may be 0.2 times the height Y1 of profile 701, and the height of arc 705 (0.8 × Y1) may be 0.8 times the height Y1 of profile 701.

An inflection point 706 may be provided at a point 50% of the height of the contour 701 of the cutoff portion 435 shown in fig. 41C. That is, the height of straight portion 704 (0.5 × Y1) and the height of arc portion 705 (0.5 × Y1) may be 0.5 times the height Y1 of profile 701, respectively.

An inflection point 706 may be provided at a point of 80% of the height of the contour 701 of the cutoff portion 435 shown in fig. 41D. That is, the height of straight portion 704 (0.8 × Y1) may be 0.8 times the height Y1 of profile 701, and the height of arc 705 (0.2 × Y1) may be 0.2 times the height Y1 of profile 701.

Referring to fig. 42, it can be confirmed that the blower fans b, c, and d provided in the case cover 430 of the present embodiment reduce noise as compared to the blower fan a provided in the conventional case cover.

Hereinafter, for convenience of explanation, the blower fan provided on the case cover having the contour 701 shown in fig. 41B is referred to as a first blower fan B, the blower fan provided on the case cover having the contour 701 shown in fig. 41C is referred to as a second blower fan C, and the blower fan provided on the case cover having the contour 701 shown in fig. 41D is referred to as a third blower fan D.

With respect to the case of the air volume of 5.3CMM, 41.7dB of noise was measured in the blower fan a, 40.9dB of noise was measured in the first blower fan b, 40.4dB of noise was measured in the second blower fan c, and 41.4dB of noise was measured in the third blower fan d, which were installed in the conventional casing cover. That is, it was confirmed that the first blower fan b was reduced by 0.8dB, the second blower fan c was reduced by 1.3dB, and the third blower fan d was reduced by 0.3dB, compared to the blower fan a provided in the conventional case cover.

As a result, the blower fans b, c, d provided in the case cover 430 of the present embodiment have an effect of reducing noise as compared with the conventional blower fan a, and particularly, when the inflection point 706 is provided at a point 50% of the height of the contour 701, the noise reduction effect is most excellent.

Even if all the elements of the embodiments are coupled to one element or operated in a combined state, the present invention is not limited to such an implementation. That is, all of these elements may be selectively combined with each other without departing from the scope of the present invention. Further, when an object is described as including (or containing or having) some elements, it is to be understood that it may include (or contain or have) only these elements, or may include (or contain or have) these elements and other elements if not particularly limited. Unless otherwise explicitly defined herein, all terms (including technical and scientific terms) used herein shall be answered by those skilled in the art. As with the terms defined in the dictionary, the terms generally used need to be interpreted as meanings used in the technical context and not as perfect or overly formal meanings unless expressly defined herein.

While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the preferred embodiments should be regarded only as illustrative, not restrictive, and the technical scope of the present invention should not be limited to the embodiments. The scope of the present invention is defined not by the detailed description but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

Claims (10)

1. A humidified air purifier, comprising:

a case having an air supply fan;

a door assembly coupled to the cabinet in a manner of being drawn out from a direction in which the blower fan is spaced apart from the cabinet;

an air filter disposed at the door assembly;

a discharge unit formed at an upper portion of the case and discharging the air passing through the air filter; and

a housing cover located between both side surfaces of the case below the discharge portion;

the housing cover includes:

a guide plate surrounding the blower fan so as to guide the air from the blower fan to the discharge portion, and having a cut-off portion formed therein for dividing the air into a rotational flow discharged from the blower fan and an upward flow toward the discharge portion; and

and an extension plate extending from one side of the guide plate to one side surface of the case to restrict a lateral flow of the air discharged from the discharge portion.

2. The humidified air purifier of claim 1, wherein,

the extension plate extends from one side of the guide plate forming the cut-off part to one side surface of the case at a minimum distance.

3. The humidified air purifier of claim 1, wherein,

the extension plate extends horizontally toward one side of the case.

4. The humidified air purifier of claim 1, wherein,

also comprises a humidifying filter arranged on the door component,

the air discharged from the discharge portion is air that has passed through the air filter and the humidification filter.

5. The humidified air purifier of claim 1, wherein,

the horizontal distance between one side of the guide plate and one side surface of the box body is larger than the horizontal distance between the other side of the guide plate and the other side surface of the box body.

6. The humidified air purifier of claim 1, wherein,

the guide plate includes a discharge guide plate extending obliquely from the cutting portion toward the discharge portion,

the included angle between the spitting-out guide plate and the extension plate is an obtuse angle.

7. The humidified air purifier of claim 6, wherein,

the discharge guide plate is formed such that: the angle of inclination from the cut portion to one side surface of the case is increased as the extension length of the extension plate is increased.

8. The humidified air purifier of claim 1, wherein,

the casing cover further includes a cover plate located behind the blower fan and defining a discharge flow path together with the guide plate,

the extension plate extends in a perpendicular manner to the cover plate.

9. The humidified air purifier of claim 1, wherein,

the guide plate includes:

a first guide member extending in an arc shape so as to surround a part of the outer periphery of the blower fan;

a second guide extending upward from one end of the first guide toward the discharge portion; and

and a third guide extending from the other end of the first guide toward the discharge portion, wherein an upper end of the third guide is connected to the extension plate.

10. The humidified air purifier of claim 1, wherein,

comprising a plurality of panels joined to form a unitary appearance,

at least one panel of the plurality of panels is formed of wood.

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