KR102531998B1 - Ceiling type air conditioner - Google Patents

Abstract

The ceiling type air conditioner according to an embodiment of the present invention includes a rear guide installed in an air discharge passage and guiding air passing through the heat exchanger to the discharge unit, and the rear guide includes air passing through the heat exchanger. a first guide part for guiding the suction side of the blowing fan; and a second guide part extending roundly from the first guide and guiding the air discharged from the blowing fan to the discharge part. At this time, a guide protrusion protruding toward the blowing fan and extending in a longitudinal direction of the blowing fan is formed on the second guide part.

Description

Ceiling type air conditioner}

The present invention relates to a ceiling type air conditioner.

An air conditioner is a device for maintaining the air in a predetermined space in the most suitable state according to the use and purpose. In general, the air conditioner includes a compressor, a condenser, an expansion device, and an evaporator, and a refrigeration cycle that performs compression, condensation, expansion, and evaporation of refrigerant is driven to cool or heat the predetermined space. .

The predetermined space may be proposed in various ways according to a place where the air conditioner is used. For example, when the air conditioner is disposed in a home or office, the predetermined space may be an indoor space of the house or building.

When the air conditioner performs a cooling operation, the outdoor heat exchanger provided in the outdoor unit functions as a condenser and the indoor heat exchanger provided in the indoor unit performs the function of an evaporator. On the other hand, when the air conditioner performs a heating operation, the indoor heat exchanger functions as a condenser and the outdoor heat exchanger functions as an evaporator.

Air conditioners may be classified into upright type, wall-mounted type, or ceiling type type according to the installation location. The upright type air conditioner is an air conditioner installed to stand upright in an indoor space, and the wall-mounted air conditioner is understood to be an air conditioner installed to be attached to a wall surface. And, the ceiling-type air conditioner is understood as a type of air conditioner installed on the ceiling.

The present applicant has filed and published an application (hereinafter referred to as prior literature) related to a ceiling type air conditioner. The information of prior literature is as follows.

1. Publication number (publication date): 10-2009-0083179 (August 3, 2009)

2. Title of Invention: Ceiling type air conditioner

According to the prior literature, the following problems exist.

First, in the case of a conventional ceiling-type air conditioner, the air sucked through the suction part of the front panel flows toward the heat exchanger by driving the blowing fan. However, since there is no guide member for guiding the flow of air toward the heat exchanger, there is a problem in that air flow in the air intake passage is not smooth.

Second, in a conventional ceiling-type air conditioner, a PCB device is disposed on one side of an air intake passage. At this time, since an empty space is formed between the PCB device and the suction part of the front panel, there is a problem in that a vortex is generated while the indoor air flows toward the heat exchanger. When a vortex is generated, the flow rate of the air sucked into the suction unit is reduced, and as a result, there is a problem in that the suction flow rate is reduced. In addition, there was a problem that abnormal noise was generated by the vortex.

Third, the air passing through the heat exchanger is sucked into the blowing fan and discharged in the radial direction of the blowing fan, and the discharged air is discharged to the discharge part of the front panel according to the guidance of the rear guide. However, since the air discharged from the blowing fan is not properly guided by the rear guide, there is a problem in that static pressure loss occurs while flowing to the discharge unit. When a static pressure loss occurs, the flow rate of air is reduced, and accordingly, there is a problem in that abnormal noise is greatly generated.

An object of the present invention is to provide a ceiling type air conditioner capable of smoothly generating air flow on the intake side and air flow on the discharge side of the air conditioner.

Another object of the present invention is to provide a ceiling-type air conditioner capable of suppressing eddy currents generated in an air intake passage, thereby improving noise and increasing intake flow rate.

Another object of the present invention is to provide a ceiling-type air conditioner capable of reducing flow velocity loss by minimizing static pressure loss generated in an air discharge passage and reducing abnormal noise due to static pressure loss.

A ceiling type air conditioner according to an embodiment of the present invention for achieving the object of the present invention as described above includes a case forming an inner space equipped with a blowing fan; a front panel coupled to the case and formed with a suction part and a discharge part; a heat exchanger for heat-exchanging air sucked into the case and partitioning the inner space into a suction passage and a discharge passage; and a rear guide installed in the discharge passage and guiding the air passing through the heat exchanger to the discharge unit.

The rear guide includes a first guide part for guiding the air passing through the heat exchanger to a suction side of the blowing fan; and a second guide part extending roundly from the first guide and guiding the air discharged from the blowing fan to the discharge part. At this time, the second guide portion protrudes toward the blowing fan and has a guide protrusion extending in a lengthwise direction of the blowing fan, so that the flow in the air discharge passage can be smoothly performed.

In addition, a guide step protruding toward the suction side of the blowing fan is provided between the first guide part and the second guide part. Further, the second guide part includes a first guide part extending roundly from the guide jaw and having a first width W1; A second guide part extending from the first guide part and having a second width W2 greater than the first width W1 is included.

In addition, the second guide part includes a third guide part extending from the second guide part and having the guide protrusion, and a third width W3 of the third guide part is the second width It is formed smaller than (W2). At this time, the guide protrusion may be formed at an end of the third guide part. A protruding height (L) of the guide protrusion vertically protruding from the inner surface of the second guide unit may have a value of 25 mm or more and less than 31 mm.

In addition, the ceiling type air conditioner may include a filter disposed on a suction side of the heat exchanger; a filter mounting portion in which the filter is mounted; a PCB device disposed in the suction passage; and a suction passage guide installed in the suction passage and extending from the filter mount to the PCB device.

At this time, a space portion defined between the PCB device and the suction portion is included, and the suction passage guide is arranged to shield at least a portion of the space portion, thereby suppressing vortexes generated in the air suction passage, thereby reducing noise. With the improvement, the suction flow rate can be increased.

The suction passage guide may be installed to extend from the front panel to the PCB device, and the suction passage guide may extend from the front panel toward the PCB device in a rounded shape.

In addition, the suction flow guide includes a first part extending from the front panel toward the PCB device, and a second part extending from an end of the first part to the PCB device. An angle (A) formed with respect to the filter surface may be smaller than an angle (B) formed by the second part with respect to the filter surface.

In addition, one end of the suction flow guide is detachably coupled to the filter mounting portion and the other end is detachably coupled to the PCB device. In this case, the filter mounting part may be horizontally disposed on the outlet side of the suction part. Therefore, since the suction passage guide can be stably supported on the inside of the front panel and the PCB device, it is possible to prevent the suction passage guide from falling off or being damaged due to air suction pressure.

According to the ceiling type air conditioner according to the embodiment of the present invention having the above structure, the following effects are obtained.

First, since a suction passage guide is provided to guide the flow of air sucked from the intake part of the front panel, the flow in the air suction passage is smooth.

Second, there is an advantage in that the vortex generated in the air intake flow path is suppressed by the intake flow path guide, thereby improving noise and increasing the intake flow rate.

Third, since the suction passage guide can be stably supported on the inside of the front panel and the PCB device, it is possible to prevent the suction passage guide from falling off or being damaged due to air suction pressure.

Fourth, by the structure of the rear guide for guiding the flow of air passing through the heat exchanger, the flow in the air discharge passage can be made smooth. In addition, there is an advantage in that it is possible to reduce the flow velocity loss by minimizing the static pressure loss generated in the air discharge passage and to dramatically reduce abnormal noise due to the static pressure loss.

1 is a front view showing the configuration of a ceiling type air conditioner according to a first embodiment of the present invention.
2 is an exploded perspective view of the ceiling type air conditioner of FIG. 1;
3 is a cross-sectional view showing an internal configuration of the ceiling type air conditioner of FIG. 1;
4 is a cross-sectional perspective view of an air conditioner equipped with a suction flow path guide according to a first embodiment of the present invention viewed from below.
5 is a perspective view showing a rear guide according to a first embodiment of the present invention;
Figure 6 is a side view of the rear guide of Figure 5;
7 is a graph showing a noise reduction effect during operation of the air conditioner according to the first embodiment of the present invention.
8 is a graph showing the noise reduction effect according to the protrusion height of the guide protrusion according to the first embodiment of the present invention.
9 is a cross-sectional perspective view showing a suction passage guide according to a second embodiment of the present invention.
10 is a cross-sectional perspective view showing a suction passage guide according to a third embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention will be able to easily suggest other embodiments within the scope of the same spirit.

1 is a front view showing the configuration of a ceiling type air conditioner according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the ceiling type air conditioner of FIG. 1, and FIG. 3 is a ceiling type air conditioner of FIG. 1 This is a cross-sectional view showing the internal configuration of the conditioner.

1 to 3 , a ceiling type air conditioner (10, hereinafter referred to as an air conditioner) according to a first embodiment of the present invention includes a case 100 and a front panel 190. The case 100 is buried in the inner space of the ceiling, and the front panel 190 may be coupled to the lower side of the case 100 . Also, the front panel 190 may be positioned at approximately the height of the ceiling and exposed to the outside.

Inside the case 100, a number of parts may be installed. To this end, the case 100 provides a predetermined inner space 101, and one surface may be opened. For example, the case 100 may be formed in a rectangular box shape.

In detail, the plurality of parts include a heat exchanger 110 that exchanges heat with air sucked into the case 100 . The heat exchanger 110 extends obliquely upward with respect to the front panel 190 and may be disposed on a suction side of the blowing fan 120 based on air flow.

The plurality of components further include a main drain pan 130 supporting a lower portion of the heat exchanger 110 and collecting condensed water generated in the heat exchanger 110 . The main drain pan 130 may be installed and fixed inside the front panel 190 .

The plurality of components further include a sub-drain pan 140 for preventing condensed water from falling directly downward from the middle of the heat exchanger 110 . The sub-drain pan 140 may be disposed between the heat exchanger 110 and the main drain pan 130 to assist water collection into the main drain pan 130 .

The plurality of components further include a filter mounting portion 150 for mounting the filter 160 thereon. The filter mounting portion 150 may be formed in a frame or grill shape to allow the filter 130 to be mounted and detached. The filter mounting part 150 may be supported by the front panel 190 and the main drain pan 130 .

Specifically, the filter mounting portion 150 includes a filter support portion 151 on which the filter 160 is substantially seated, and a filter bracket for supporting the filter support portion 151 by being coupled to the inside of the filter support portion 151 ( 153) are included.

The filter support 151 may be formed in a rectangular frame or grill shape with an empty inside. The filter support part 151 may be formed long in the longitudinal direction of the front panel 190, and the filter 160 may be placed inside.

The filter bracket 153 is formed in a rectangular frame or grill shape corresponding to the shape of the filter support 151 so that the filter support 151 is mounted inside. That is, the filter bracket 153 is formed to have a larger area than the filter support 151 so that the entire filter support 151 is accommodated inside the filter bracket 153 .

The filter bracket 153 is installed inside the front panel 190, specifically, on the outlet side of the suction part 193 of the front panel 190. That is, the filter bracket 153 is disposed on a suction passage through which indoor air sucked through the suction part 193 passes. The filter bracket 153 may be horizontally disposed on the outlet side of the suction part 193 .

For example, the filter bracket 153 may have one end fixed to one side of the main drain pan 130 and the other end fixed to the inside of the front panel 190 . As another example, the filter bracket 153 may have one end fixed to one side of the main drain pan 130 and the other end fixed to the inside of the case 100 . With this configuration, the filter bracket 153 can be stably supported inside the case 100 .

The plurality of parts further include a blowing fan 120 driven to suck in and discharge indoor air. The blowing fan 120 is formed long along the longitudinal direction of the air conditioner 10 . For example, the blowing fan 120 may include a cross-flow fan.

The blowing fan 120 is disposed behind the heat exchanger 110 . That is, the heat exchanger 110 is disposed on the suction side of the blowing fan 120 . Therefore, the air sucked through the suction part 193 of the front panel 190 exchanges heat through the heat exchanger 110, and the heat-exchanged air passes through the blowing fan 120 to return to the front panel 190. is discharged to the discharge unit 195 of the

Here, based on the heat exchanger 110, the air flow path from the suction part 193 of the front panel 190 to the heat exchanger 110 is defined as a "suction flow path", and the heat exchanger 110 An air passage from the air passage to the discharge part 195 of the front panel 190 is defined as a "discharge passage".

The plurality of components further include a filter 160 disposed inside the suction part 193 of the front panel 190 to filter foreign substances in the air. Based on the air flow, the filter 160 may be disposed on the outlet side of the suction part 193 . That is, the filter 160 is disposed on the suction passage. The filter 160 is attached to or detached from the filter mounting portion 150, so replacement and management of the filter becomes easy.

The plurality of parts further include a suction passage guide 170 for guiding the flow of indoor air sucked through the suction part 193 . The suction passage guide 170 is disposed on the suction passage. The suction passage guide 170 serves to guide indoor air sucked through the suction part 193 to flow smoothly toward the heat exchanger 110 .

A rear guide 180 for guiding the flow of indoor air passing through the heat exchanger 110 is further included in the plurality of parts. The rear guide 180 is disposed on the discharge passage. The rear guide 180 serves to guide indoor air passing through the heat exchanger 110 to smoothly flow to the outlet 195 of the front panel 190 . To this end, the rear guide 180 is in close contact with the inner surface of the case 100 and is disposed long in the horizontal direction.

And, the plurality of components further include a PCB device 200 for controlling the operation of the air conditioner 10 . The PCB device 200 is installed on the inner surface of the case 100 . Specifically, the PCB device 200 is disposed on an inner edge portion of the case 100 . And, the PCB device 200 is disposed on the suction passage.

The front panel 190 is mounted on the lower end of the case 100 and may have a substantially rectangular shape when viewed from below. In addition, the front panel 190 may be formed to protrude outward more than the lower end of the case 100 so that a circumferential portion contacts the lower surface of the ceiling.

In detail, the front panel 190 includes a panel body 191 forming a suction part 193 and a discharge part 195 and a suction grill 192 detachably coupled to the suction part 193. . The suction grill 192 includes a plurality of grill parts 192a for preventing foreign substances from entering through the suction part 193 .

The suction part 193 may be formed long in the horizontal direction at the front part of the front panel 190 , and the discharge part 195 may be formed long in the horizontal direction at the rear part of the front panel 190 .

The air conditioner 10 further includes a discharge vane 196 movably provided on one side of the discharge unit 195 to adjust the amount or wind direction of air discharged through the discharge unit 195. do. For example, the discharge vane 196 may be provided rotatably forward and backward around hinge shafts provided at both ends of the discharge vane 196 .

Meanwhile, the air conditioner 10 according to the embodiment of the present invention is characterized in that a suction passage guide 170 is provided to guide the flow of indoor air sucked into the suction part 193 smoothly. That is, in the case of the conventional ceiling-type air conditioner, there is a problem in that air flow in the suction passage is not smooth because there is no guide member to help guide indoor air flowing through the suction passage. Therefore, in the present invention, since the suction passage guide 170 is provided in the suction passage, air flow in the suction passage can be made smooth.

Hereinafter, the suction passage guide 170 will be described in detail with reference to the drawings.

4 is a cross-sectional perspective view of an air conditioner equipped with a suction passage guide according to a first embodiment of the present invention viewed from below.

Referring to FIGS. 3 and 4 , the suction passage guide 170 according to the first embodiment of the present invention is disposed on the suction passage and guides the flow of indoor air sucked in through the suction part 193. .

The suction passage guide 170 may be installed to connect the front panel 190 and the PCB device 200 . At this time, the suction passage guide 170 is arranged to extend from the front panel 190 to the PCB device 200, and the space portion 105 between the PCB device 200 and the suction part 193 is formed. to cover up Here, the space part 105 may be understood as an empty space existing between the PCB device 200 and the suction part 193 of the front panel 190 .

For example, the suction passage guide 170 may be disposed to connect the filter mounting portion 150 and the PCB device 200 to shield at least a portion of the space portion 105 . The reason why the space part 105 is shielded is that suction air stays in the space part 105 between the PCB device 200 and the suction part 193 and vortex is generated. Therefore, in the present invention, the suction passage guide 170 shields the space 105 between the PCB device 200 and the suction part 193 in order to suppress the vortex.

Specifically, the suction flow guide 170 includes a first part 171 extending from the front panel 190 toward the PCB device 200, and an end portion of the first part 171 toward the PCB device. It may include a second part 173 extending to (200).

The first part 171 and the second part 173 may be inclined upward with respect to the filter 160 surface. For example, the first part 171 and the second part 173 may have a plate shape with flat upper and lower surfaces, respectively. Also, the first part 171 and the second part 173 may be formed of a plastic resin material and may be injection molded integrally.

In addition, the suction passage guide 170 may be formed as a single unit, and one end may be coupled to the filter mounting portion 150 and the other end may be coupled to the PCB device 200 . Specifically, the first part 171 may be coupled to the filter mounting part 150 and the second part 173 may be coupled to the PCB device 200 . At this time, as the coupling method, various methods such as a hanging method using a hook or a concavo-convex coupling method using a protrusion/groove shape may be applied.

That is, the first part 171 can be understood as a part mounted or coupled to one side of the filter mounting part 150, and the second part 173 is mounted or coupled to one side of the PCB device 200. can be understood as a part of

On the other hand, the first part 171 includes an inclined surface inclined upward toward the PCB device 200 from the end of the filter mounting portion 150 . And, the second part 173 includes an inclined surface inclined upward toward the PCB device 200 from the end of the first part 171 .

That is, with reference to FIG. 3 , the suction flow path guide 170 includes a first straight portion that is a first part 171 connected to the filter mounting portion 150 and a second straight portion connected to the PCB device 200. Part 173 may be formed of a second straight portion. At this time, the length of the first straight line portion may be longer than the length of the second straight line portion.

In addition, based on FIG. 3 , an angle (A°) formed by a line extending horizontally from an upper end of the filter 160 or the filter mounting portion 150 and an inclined surface of the first part 171 is the filter ( 160) or may be smaller than an angle (B°) formed between a line extending horizontally from the upper end of the filter mounting part 150 and an inclined surface of the second part 173. In other words, the slope of the slope of the second part 173 may be steeper than the slope of the slope of the first part 171 .

According to the above configuration of the suction passage guide 170, the indoor air sucked into the suction passage guide 170 can be smoothly guided toward the heat exchanger 110 along the wall surface of the suction passage guide 170. there is. That is, the suction passage guide 170 according to the present invention serves to minimize pressure loss in the suction passage by using the Coanda effect and guide indoor air to the vicinity of the heat exchanger 110 .

In addition, since the suction flow guide 170 shields the space 105 between the PCB device 200 and the suction part 193 to suppress vortexes generated in the space 105, noise is reduced. It has the effect of improving and improving the suction flow rate.

In addition, since the suction passage guide 170 is stably supported on the inside of the front panel 190 and the PCB device 200, the suction passage guide 170 is removed or damaged by air suction pressure. There is an effect that can be prevented.

On the other hand, the air conditioner 10 according to the embodiment of the present invention is provided with a rear guide 180 capable of guiding the flow of indoor air passing through the heat exchanger 110 to prevent abnormal noise. do.

For example, in the case of a conventional ceiling-type air conditioner, there is a problem in that the room air passing through the heat exchanger collides with the rear guide and generates a large abnormal noise. The reason for such abnormal noise is that the air flow rate at the end of the rear guide decreases as a result of the conventional rear guide not properly guiding the flow of air flowing through the discharge side of the blowing fan, and accordingly, vortexes are generated inside the rear guide. It was because.

Accordingly, the present invention is characterized by providing a rear guide capable of reducing abnormal noise by guiding indoor air passing through the heat exchanger of the air conditioner to smoothly flow toward the discharge unit.

Hereinafter, the rear guide 180 will be described in detail with reference to the drawings.

5 is a perspective view showing a rear guide according to a first embodiment of the present invention, and FIG. 6 is a side view of the rear guide of FIG. 5 .

Referring to FIGS. 5 and 6 , the rear guide 180 according to the embodiment of the present invention adheres closely to the inner surface of the case 100 and is disposed elongated in the horizontal direction. At this time, the rear guide 180 is in close contact with the inner edge of the case 100 and is disposed to cover the blowing fan 120 .

Specifically, the rear guide 180 includes a first guide part 181 for guiding the air passing through the heat exchanger 110 to the suction side of the blowing fan 120, and from the first guide part 181 It extends in a round shape and includes a second guide part 183 for guiding the air discharged from the blowing fan 120 to the discharge part 195.

The first guide part 181 may be formed in a plate shape elongated in the horizontal direction, and the second guide part 183 may be rounded in an arc shape at an end of the first guide part 181 . And, the blowing fan 120 is positioned in the inner space formed by the second guide part 183 .

Here, the first guide part 181 forms a first discharge passage through which indoor air that has passed through the heat exchanger 110 flows toward the suction side of the blowing fan 120, and the second guide part 183 ) forms a second discharge passage through which indoor air discharged from the blowing fan 120 flows to the discharge part 195 .

That is, the air discharge passage of the air conditioner 10 includes a first discharge passage guided by the first guide part 181 and a second discharge passage guided by the second guide part 183. can be seen as being done.

A guide jaw 182 is formed on the first guide part 181 to smoothly guide indoor air passing through the heat exchanger 110 to the suction side of the blowing fan 120 . The guide jaw 182 may be formed at a point dividing the first discharge passage and the second discharge passage. That is, the guide jaw 182 is provided between the first guide part 181 and the second guide part 183 .

Specifically, the guide jaw 182 is formed by protruding a part of the inner surface of the first guide part 181 inward. And, the guide jaw 182 protrudes toward the suction side of the blowing fan 120 between the first guide part 181 and the second guide part 183 . That is, the guide jaw 182 is disposed close to the suction side of the blowing fan 120 . At this time, the guide jaw 182 forms an inclined surface 182a of a predetermined length.

Therefore, at least a portion of the indoor air that has passed through the heat exchanger 110 flows along the inner surface of the first guide part 181, and then flows through the inclined surface 182a of the guide jaw 182 to the blowing fan 120. ) can be guided to the suction side of

In addition, a guide protrusion 184 is formed on the second guide part 183 to smoothly guide indoor air passing through the blowing fan 120 toward the discharge part 195 .

Specifically, the guide protrusion 184 protrudes from the inner surface of the second guide part 183 toward the blowing fan 120 and extends long in the longitudinal direction of the blowing fan 120 . The guide protrusion 184 may be formed at an end of the second guide part 183 .

For example, the second guide part 183 includes a first guide part 183a extending roundly from the guide jaw 183 and having a first width W1, and the first guide part 183a. ), and a second guide part 183b having a second width W2 greater than the first width W2 and extending from the second guide part 183b and having a second width W2 greater than the second width W2. A third guide part 183c having a small third width W3 is included.

And, the guide protrusion 184 is provided at an end of the third guide part 183c. That is, the guide protrusion 184 protrudes from the end of the third guide part 183c toward the blowing fan 120 at a predetermined height (L) and extends long in the longitudinal direction of the blowing fan 120. . At this time, the height L of the guide protrusion 184, that is, the height protruding in a vertical direction from the inner surface of the second guide part 183 may have a value of 25 mm or more and less than 31 mm. In addition, the guide protrusion 184 forms an inclined surface 184a of a predetermined length.

In addition, the guide protrusion 184 is disposed adjacent to the blowing fan 120 . That is, the guide protrusion 184 is disposed close to the discharge side of the blowing fan 120 . Therefore, the indoor air passing through the blowing fan 120 flows along the inner surface of the second guide part 183 and then rides the inclined surface 184a of the guide protrusion 184 toward the discharge part 195. May be guided gently.

7 is a graph showing a noise reduction effect during operation of the air conditioner according to the first embodiment of the present invention.

FIG. 7 is a graph showing average noise detected in the air conditioner to which the rear guide of the present invention is applied and average noise detected in the air conditioner to which the conventional rear guide is applied when the air conditioner is operated.

As shown in FIG. 7 , it can be seen that the noise in the case of adopting the rear guide structure according to the first embodiment of the present invention is significantly lower than the noise in the case of adopting the structure according to the prior art.

Specifically, it can be confirmed that the average noise detected in the air conditioner to which the rear guide having the guide protrusion 184 of the present invention is applied is reduced by up to 2 dBA compared to the average noise detected in the air conditioner to which the conventional rear guide is applied. could

8 is a graph showing the noise reduction effect according to the protrusion height of the guide protrusion according to the first embodiment of the present invention.

As shown in FIG. 8, it can be seen that the sensed noise is significantly different as the protruding height L of the guide protrusion 184 of the present invention is designed differently.

Specifically, it was found that a remarkable noise reduction effect was shown when the protruding height (L) of the guide protrusion 184 exceeded 25 mm. However, there is a problem in that the protruding height (L) of the guide protrusion 184 is difficult to exceed 31 mm due to the space limitation of the discharge passage of the air conditioner. Therefore, in the present invention, it is proposed to design the protruding height (L) of the guide protrusion 184 to be 25 mm or more and less than 31 mm.

As such, it was confirmed that by optimally designing the protruding height of the guide protrusion, air flow resistance in the discharge passage can be minimized and abnormal noise can be remarkably reduced.

9 is a cross-sectional perspective view showing a suction passage guide according to a second embodiment of the present invention.

Referring to FIG. 9 , the suction passage guide 170 according to the second embodiment of the present invention may include a plurality of curvatures having different curvatures.

Specifically, the suction passage guide 170 includes a first part 175 extending upwardly from the end of the front panel 190 or the filter mounting part 150 in a round shape, and an end of the first part 175. It may include a second part 177 that extends upwardly in a rounded manner.

At this time, the first part 175 and the second part 177 are formed to have different curvatures. For example, one of the first part 175 and the second part 177 may be convexly rounded, and the other may be concavely rounded.

That is, the first part 175 may be convexly rounded upward toward the PCB device 200, and the second part 177 may be formed at an end of the first part 175. It can be rounded concavely with (200). Accordingly, the suction passage guide 170 may be formed to have a wavy cross section as a whole.

According to this configuration, since the inner surface of the suction passage guide 170 through which indoor air flows is rounded, the sucked indoor air travels along the round wall of the suction passage guide 170 to the heat exchanger 110. It can flow smoothly to the side. Accordingly, there is an effect of increasing the suction flow rate by reducing the air flow resistance.

In addition, since the first part 175, which is a part of the suction passage guide 170, is rounded into the space 105 between the PCB device 200 and the suction part 193, it is relatively a suction passage passage. It has the effect of widening the cross-sectional area.

10 is a cross-sectional perspective view showing a suction passage guide according to a third embodiment of the present invention.

Referring to FIG. 10 , the suction passage guide 170 according to the third embodiment of the present invention may be formed of a single curved portion 179 having a predetermined curvature. For example, the suction passage guide 170 may be formed in an arc shape.

Specifically, the suction flow path guide 170 may include a curved portion 179 that is rounded from an end of the front panel 190 or the filter mounting portion 150 toward the PCB device 200. The curved portion 179 is disposed to connect the front panel 190 or the filter mounting portion 150 and the PCB device 200, and provides a gap between the PCB device 200 and the suction portion 193. The space portion 105 may be shielded. Also, one end of the curved portion 179 may be coupled to the front panel 190 or the filter mounting portion 150, and the other end may be coupled to the PCB device 200.

According to the ceiling type air conditioner configured as described above, a suction passage guide for guiding the flow of air sucked in from the suction part of the front panel is provided, so that the flow in the air suction passage is smooth. In addition, there is an advantage in that the vortex generated in the air intake flow path is suppressed by the intake flow path guide, thereby improving noise and increasing the intake flow rate.

In addition, since the suction passage guide can be stably supported on the inside of the front panel and the PCB device, it is possible to prevent the suction passage guide from falling off or being damaged due to air suction pressure.

In addition, by the structure of the rear guide for guiding the flow of air passing through the heat exchanger, the flow in the air discharge passage can be made smooth. In addition, there is an advantage in that it is possible to reduce the flow velocity loss by minimizing the static pressure loss generated in the air discharge passage, and to dramatically reduce abnormal noise due to the static pressure loss.

Claims (15)

A case forming an internal space in which a cross-flow fan is provided;
a front panel coupled to the case and formed with a suction part and a discharge part;
a heat exchanger disposed on a suction side of the cross-flow fan to exchange heat with the air sucked into the case, and partitioning the internal space into a suction passage and a discharge passage; and
A rear guide installed on an inner surface of the case corresponding to the discharge passage and guiding the air passing through the heat exchanger to the discharge unit is included;
In the rear guide,
a first guide part for guiding the air passing through the heat exchanger to a suction side of the cross-flow fan; and
a second guide part extending roundly from the first guide part, disposed to surround the cross-flow fan, and guiding the air discharged from the cross-flow fan to the discharge part;
The ceiling type air conditioner according to claim 1 , wherein guide protrusions protruding toward the cross-flow fan and extending in a longitudinal direction of the cross-flow fan are formed on the second guide part. According to claim 1,
The ceiling type air conditioner, characterized in that the guide protrusion is formed at an end of the second guide part. According to claim 1,
A ceiling type air conditioner having a guide chin protruding toward a suction side of the crossflow fan between the first guide part and the second guide part. According to claim 3,
In the second guide part,
a first guide part extending roundly from the guide jaw and having a first width W1; and
and a second guide part extending from the first guide part and having a second width (W2) greater than the first width (W1). According to claim 4,
In the second guide part,
A third guide part extending from the second guide part and having the guide protrusion is further included,
The third width (W3) of the third guide part is smaller than the second width (W2). According to claim 5,
The guide protrusion is formed at an end of the third guide part. According to claim 1,
The ceiling type air conditioner, characterized in that the protruding height (L) of the guide protrusion vertically protruding from the second guide portion has a value of 25 mm or more and less than 31 mm. According to claim 1,
a filter mounting portion disposed on a suction side of the heat exchanger and having a filter mounted thereon;
a PCB device installed on an inner surface of the case corresponding to the suction passage; and
A ceiling type air conditioner comprising a suction passage guide connecting the filter mounting portion and the PCB device to guide air sucked through the suction portion toward the heat exchanger. According to claim 8,
A space portion defined between the PCB device and the suction portion is included,
The ceiling type air conditioner according to claim 1 , wherein the suction passage guide is disposed to shield at least a portion of the space portion. According to claim 9,
The suction flow guide is installed to extend from the front panel to the PCB device. According to claim 10,
The ceiling type air conditioner of claim 1 , wherein the suction flow guide extends roundly from the front panel toward the PCB device. According to claim 10,
The suction flow guide includes a first part extending from the front panel toward the PCB device, and a second part extending from an end of the first part toward the PCB device. According to claim 12,
An angle (A) formed between a line extending the filter horizontally with the ground and an inclined surface of the first part is smaller than an angle (B) formed between a line extending the filter horizontally with the ground and an inclined surface of the second part. A ceiling type air conditioner, characterized in that. According to claim 10,
The ceiling type air conditioner of claim 1 , wherein the suction flow guide has one end detachably coupled to the filter mounting portion and the other end detachably coupled to the PCB device. According to claim 10,
The ceiling type air conditioner of claim 1 , wherein the filter mounting portion is disposed horizontally at an outlet side of the inlet portion.

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