KR20190070773A - Ceiling type air conditioner - Google Patents

Abstract

According to an embodiment of the present invention, a ceiling type air conditioner includes a rear guide installed in an air discharge flow path and guiding air which has passed through a heat exchanger to a discharge part. The rear guide comprises: a first guide part guiding the air which has passed through the heat exchanger to a suction side of an air blowing fan; and a second guide part extending from the first guide part to be rounded and guiding air discharged from the air blowing fan to the discharge part. Moreover, a guide protrusion protruding to the air blowing fan and extending in the longitudinal direction of the air blowing fan is formed in the second guide part.

Description

Ceiling type air conditioner

The present invention relates to a ceiling type air conditioner.

The air conditioner is a device for keeping the air in a predetermined space in a most suitable condition according to the purpose of use and purpose. Generally, the air conditioner includes a compressor, a condenser, an expansion device, and an evaporator, and a refrigeration cycle for compressing, condensing, expanding, and evaporating the refrigerant is driven to cool or heat the predetermined space .

The predetermined space may be variously suggested depending on the place where the air conditioner is used. For example, when the air conditioner is installed in a home or an office, the predetermined space may be an indoor space of a house or a building.

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

Depending on the installation position, the air conditioner can be classified into an upright type, a wall-mounted type, or a ceiling type. The upright type air conditioner is an air conditioner installed to stand up in an indoor space, and the wall-mounted type air conditioner is understood as an air conditioner installed to be attached to a wall surface. The ceiling-type air conditioner is understood as an air conditioner of a ceiling type.

The present applicant has made an application (hereinafter, referred to as a prior art document) related to a ceiling type air conditioner and disclosed it. The information of the preceding documents is as follows.

1. Public number (public date): 10-2009-0083179 (August 3, 2009)

2. Title of the invention: Ceiling type air conditioner

According to the above prior art, the following problems exist.

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

Secondly, in the conventional ceiling type air conditioner, the PCB device is disposed on one side of the air suction flow path. At this time, a vacant space is formed between the PCB unit and the suction unit of the front panel, so that a vortex is generated in the course of the indoor air flowing toward the heat exchanger. When a vortex is generated, there is a problem that the flow rate of the air sucked into the suction portion is reduced, resulting in a decrease in the suction flow rate. Further, there is a problem that abnormal noise is generated by the vortex.

Third, the air that has passed 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 discharging portion of the front panel in accordance with the guide of the rear guide. However, the air discharged from the blower fan can not be properly guided by the rear guide, so that there is a problem that a static pressure loss occurs in the process of flowing to the discharge portion. When the static pressure loss occurs, there is a problem that the flow rate of the air is reduced, and abnormal noise is generated accordingly.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ceiling-type air conditioner in which a suction side air flow and a discharge side air flow of an air conditioner can smoothly occur.

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

It is a further object of the present invention to provide a ceiling-type air conditioner which can minimize a static pressure loss generated in an air discharge passage, thereby reducing a flow velocity loss and reducing abnormal noise caused by a static pressure loss.

According to an aspect of the present invention, there is provided a ceiling-type air conditioner comprising: a case defining an internal space including a blowing fan; A front panel coupled to the case and having a suction portion and a discharge portion; A heat exchanger for heat-exchanging air sucked into the case and partitioning the internal space into a suction passage and a discharge passage; And a rear guide installed in the discharge passage and guiding air passing through the heat exchanger to the discharge section.

The rear guide includes a first guide portion for guiding the air having passed through the heat exchanger to 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, the second guide part protrudes toward the blowing fan, and the guide protrusion is elongated in the longitudinal direction of the blowing fan, so that the flow in the air discharge channel can be smoothly performed.

A guide protrusion protruding toward the suction side of the blowing fan is provided between the first guide portion and the second guide portion. The second guide portion includes a first guide part extending roundly from the guide tab and having a first width W1; And a second guide part extending from the first guide part and having a second width W2 greater than the first width W2.

The second guide portion may include a third guide portion extending from the second guide portion and having the guide protrusion, and the third width W3 of the third guide portion may be greater than the second width (W2). At this time, the guide protrusion may be formed at an end of the third guide part. The protrusion height L of the guide protrusion vertically protruding from the inner side surface of the second guide portion may have a value of 25 mm or more and less than 31 mm.

The ceiling type air conditioner further includes: a filter disposed on a suction side of the heat exchanger; A filter mounting portion on which the filter is mounted; A PCB device disposed in the suction passage; And a suction flow guide installed in the suction passage and extending from the filter mounting portion to the PCB device.

At this time, a space defined between the PCB unit and the suction unit is included, and the suction flow guide is arranged to shield at least a part of the space unit, whereby vortex generated in the air suction path is suppressed, And the suction flow rate can be increased.

The suction flow guide may be installed to extend from the front panel to the PCB device, and the suction flow guide may extend roundly from the front panel toward the PCB device.

The suction flow guide may include a first part extending from the front panel toward the PCB device and a second part extending from the end of the first part to the PCB device, The angle A formed with respect to the filter surface may be smaller than the angle B formed by the second part with respect to the filter surface.

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

The ceiling type air conditioner according to the embodiment of the present invention configured as described above has the following effects.

First, there is an advantage that the flow in the air suction passage is smoothly provided by providing the suction flow guide for guiding the flow of air sucked from the suction portion of the front panel.

Second, the vortex generated in the air suction passage is suppressed by the suction passage guide, thereby improving the noise and increasing the suction flow amount.

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

Fourth, by the structure of the rear guide that guides the flow of the air passing through the heat exchanger, the flow in the air discharge passage can be smoothly performed. In addition, there is an advantage that the static pressure loss generated in the air discharge passage is minimized, thereby reducing the flow velocity loss and drastically reducing the abnormal noise due to the static pressure loss.

1 is a front view showing a 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.
3 is a cross-sectional view showing the internal structure of the ceiling-type air conditioner of FIG.
4 is a cross-sectional perspective view of an air conditioner provided with a suction flow guide according to a first embodiment of the present invention.
5 is a perspective view showing a rear guide according to a first embodiment of the present invention;
6 is a side view of the rear guide of Fig. 5;
7 is a graph showing an effect of noise reduction during operation of the air conditioner according to the first embodiment of the present invention.
8 is a graph showing a noise reduction effect according to a protrusion height of a guide projection according to the first embodiment of the present invention.
9 is a sectional perspective view showing a suction flow guide according to a second embodiment of the present invention.
10 is a sectional perspective view showing a suction flow 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. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

FIG. 1 is a front view showing a 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, Sectional view showing the internal configuration of the harmonic generator.

1 to 3, a ceiling-type air conditioner 10 according to a first embodiment of the present invention includes a case 100 and a front panel 190. The case 100 is embedded in an inner space of the ceiling, and the front panel 190 can be coupled to the lower side of the case 100. The front panel 190 may be positioned at a substantially ceiling height and exposed to the outside.

Inside the case 100, a number of parts can be provided. To this end, the case 100 is provided with a predetermined inner space 101, and one side thereof may be opened. For example, the case 100 may have a rectangular box shape.

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

The plurality of components further include a main drain fan 130 for 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 fixed to the inside of the front panel 190.

The plurality of components may further include a sub-drain fan 140 for preventing the condensed water from dropping from the intermediate portion of the heat exchanger 110 to a direct lower side. The sub drain fan 140 may be disposed between the heat exchanger 110 and the main drain fan 130 to assist collection of the main drain fan 130 into the main drain fan 130.

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

The filter mounting part 150 includes a filter support part 151 on which the filter 160 is substantially seated and a filter bracket 151 that is coupled to the filter support part 151 to support the filter support part 151 153).

The filter support 151 may be a square frame or a grill with an empty interior. The filter support part 151 may be formed to be long in the longitudinal direction of the front panel 190 and the filter 160 may be disposed inside the filter support part 151.

The filter bracket 153 is formed in a square frame or a 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 supporting portion 151 so that the filter supporting portion 151 is all housed inside the filter bracket 153.

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

For example, one end of the filter bracket 153 may be fixed to one side of the main drain pan 130, and the other end may be fixed to the inside of the front panel 190. In 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 such a configuration, the filter bracket 153 can be stably supported in the case 100.

The plurality of components further include a blowing fan 120 that is driven to suck and discharge indoor air. The air blowing fan 120 is formed to be 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 portion 193 of the front panel 190 is heat-exchanged through the heat exchanger 110, and the heat-exchanged air passes through the blowing fan 120, And is discharged to the discharging portion 195 of FIG.

Here, the air flow path from the suction portion 193 of the front panel 190 to the heat exchanger 110 is defined as a "suction flow path" with respect to the heat exchanger 110, and the heat exchanger 110, To the discharge portion 195 of the front panel 190 is defined as a "discharge flow passage ".

The plurality of components may further include a filter 160 disposed inside the suction portion 193 of the front panel 190 to filter foreign substances in the air. On the basis of the air flow, the filter 160 may be disposed at the outlet side of the suction portion 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, thereby facilitating replacement and management of the filter.

The plurality of components further include a suction flow guide 170 for guiding the flow of indoor air sucked through the suction portion 193. The suction passage guide 170 is disposed on the suction passage. The suction flow guide 170 functions to guide indoor air sucked through the suction unit 193 to the heat exchanger 110 side.

The plurality of components further include a rear guide 180 for guiding the flow of indoor air that has passed through the heat exchanger 110. The rear guide 180 is disposed on the discharge passage. The rear guide 180 functions to guide indoor air having passed through the heat exchanger 110 to the discharge portion 195 of the front panel 190. To this end, the rear guide 180 is closely attached to the inner surface of the case 100 and is disposed long in the lateral direction.

Further, 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 at an inner side edge portion of the case 100. The PCB device 200 is disposed on the suction passage.

The front panel 190 may be mounted at a lower end of the case 100 and may have a substantially rectangular shape when viewed from below. The front panel 190 may protrude further outward than the lower end of the case 100 so that the periphery of the front panel 190 contacts the lower surface of the ceiling.

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

The suction portion 193 is formed to be long in the front portion of the front panel 190 and the discharge portion 195 may be formed to be long in the rear portion of the front panel 190 in the lateral direction.

The air conditioner 10 further includes a discharge vane 196 which is movably provided on one side of the discharge portion 195 and can control the amount or direction of air discharged through the discharge portion 195 do. For example, the discharge vane 196 may be rotatable about the hinge axis provided at both ends of the discharge vane 196.

In the meantime, the air conditioner 10 according to the embodiment of the present invention is provided with a suction flow guide 170 guiding the flow of indoor air sucked into the suction portion 193 smoothly. That is, in the conventional ceiling type air conditioner, there is no guide member for guiding the room air flowing through the suction passage, and there is a problem that the air flow in the suction passage is not smooth. Therefore, in the present invention, since the suction flow guide 170 is provided in the suction flow passage, the air flow in the suction flow passage can be smoothly performed.

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 provided with a suction flow guide according to a first embodiment of the present invention.

3 and 4, the suction flow guide 170 according to the first embodiment of the present invention guides the flow of indoor air sucked through the suction portion 193 disposed on the suction flow path .

The suction flow guide 170 may be installed to connect the front panel 190 to the PCB device 200. The suction path guide 170 extends from the front panel 190 to the PCB unit 200 and has a space 105 between the PCB unit 200 and the suction unit 193 Shield it. Here, the space 105 may be an empty space existing between the PCB unit 200 and the suction unit 193 of the front panel 190.

For example, the suction path guide 170 may be arranged to connect the filter mounting part 150 and the PCB device 200, and may be arranged to shield at least a part of the space part 105. The reason for shielding the space portion 105 is that the suction air stays in the space portion 105 between the PCB device 200 and the suction portion 193 and a vortex is generated. Accordingly, in the present invention, the suction flow guide 170 shields the space 105 between the PCB unit 200 and the suction unit 193 to suppress the vortex.

The suction flow guide 170 includes a first part 171 extending from the front panel 190 toward the PCB device 200 and a second part 171 extending from the end of the first part 171 toward the PCB device 200. [ And a second part 173 which extends to the first part 200 of the first part.

The first part 171 and the second part 173 may be inclined upward with respect to the surface of the filter 160. For example, the first part 171 and the second part 173 may have a plate shape having a top surface and a bottom surface, respectively. The first part 171 and the second part 173 may be formed of a plastic resin material or may be integrally injection-molded.

One end of the suction path guide 170 may be coupled to the filter mounting part 150 and the other end may be coupled to the PCB device 200. 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, various methods such as a method of hooking using a hook or a concave-convex coupling method by a protruding portion / groove shape can be applied as a coupling method.

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

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

3, the suction path guide 170 includes a first straight part as a first part 171 connected to the filter mounting part 150 and a second straight part as a second part connected to the PCB device 200. [ And a second rectilinear part which is a part 173. In this case, the length of the first rectilinear section may be longer than the length of the second rectilinear section.

3, the angle (A °) formed by the line horizontally extending the upper end of the filter 160 or the filter mounting part 150 and the inclined surface of the first part 171 is set to be smaller than the angle 160 may be smaller than an angle B ° formed by a line horizontally extending the upper end of the filter mounting part 150 and an inclined surface of the second part 173. In other words, the inclination of the inclined surface of the second part 173 may be greater than the inclination of the inclined surface of the first part 171.

The effect of the indoor air sucked into the suction portion 193 can be guided to the heat exchanger 110 side on the wall surface of the suction flow guide 170 according to the structure of the suction flow guide 170 described above have. That is, the suction flow guide 170 according to the present invention minimizes the pressure loss of the suction passage by using the coanda effect and guides the indoor air to the vicinity of the heat exchanger 110.

The suction flow guide 170 shields the vortex generated in the space 105 by shielding the space 105 between the PCB unit 200 and the suction unit 193, And the suction flow rate can be improved.

Since the suction flow guide 170 is stably supported on the inside of the front panel 190 and the PCB 200, the suction flow guide 170 is detached or damaged by the suction pressure of the air There is an effect that can be prevented.

Meanwhile, the air conditioner 10 according to the embodiment of the present invention provides a rear guide 180 for guiding the flow of indoor air having passed through the heat exchanger 110 smoothly and preventing abnormal noise do.

For example, in the case of the conventional ceiling-type air conditioner, the indoor air passed through the heat exchanger strikes the rear guide, which causes a large abnormal noise. The reason why such abnormal noise is generated is that the conventional rear guide does not properly guide the flow of the air flowing on the discharge side of the blowing fan and as a result the air flow rate at the end of the rear guide drops and thus a vortex is generated inside the rear guide It was because.

Therefore, the present invention provides a rear guide capable of guiding indoor air having passed through the heat exchanger of the air conditioner to flow smoothly toward the discharge portion, thereby reducing abnormal noise.

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

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

Referring to FIGS. 5 and 6, the rear guide 180 according to the embodiment of the present invention is closely attached to the inner surface of the case 100 and is disposed in a longitudinal direction. At this time, the rear guide 180 is closely attached to the inner edge of the case 100 and is arranged to cover the blowing fan 120.

Specifically, the rear guide 180 includes a first guide portion 181 for guiding the air that has passed through the heat exchanger 110 to the suction side of the blowing fan 120, and a second guide portion 183 for guiding air from the first guide portion 181 And a second guide part 183 extending in a round shape and 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 transverse direction and the second guide part 183 may be rounded in an arc shape at the end of the first guide part 181. The blower fan 120 is positioned in an inner space formed by the second guide portion 183.

The first guide portion 181 forms a first discharge passage through which the room air having passed through the heat exchanger 110 flows to the suction side of the blowing fan 120. The second guide portion 183 Forms a second discharge passage through which the room air discharged from the blowing fan (120) flows to the discharge section (195).

That is, the air discharge passage of the air conditioner 10 is provided with a first discharge passage guided by the first guide portion 181 and a second discharge passage guided by the second guide portion 183 .

A guide protrusion 182 is formed in the first guide part 181 to guide indoor air having passed through the heat exchanger 110 to the suction side of the blowing fan 120 smoothly. The guide protrusion 182 may be formed at a position separating the first discharge passage and the second discharge passage. That is, the guide protrusion 182 is provided between the first guide portion 181 and the second guide portion 183.

Specifically, the guide protrusion 182 is formed such that a part of the inner surface of the first guide portion 181 protrudes inward. The guide protrusion 182 protrudes toward the suction side of the blowing fan 120 between the first guide portion 181 and the second guide portion 183. That is, the guide protrusion 182 is disposed close to the suction side of the blowing fan 120. At this time, the guide protrusion 182 forms an inclined surface 182a having a predetermined length.

At least a part of the room air having passed through the heat exchanger 110 flows on the inner side surface of the first guide part 181 and is guided by the inclined surface 182a of the guide protrusion 182, As shown in Fig.

The second guide portion 183 is formed with a guide protrusion 184 for guiding indoor air having passed through the blowing fan 120 to the discharge portion 195 side smoothly.

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

For example, the second guide portion 183 is provided with a first guide portion 183a that extends roundly from the guide protrusion 183 and has a first width W1, A second guide part 183b having a second width W2 greater than the first width W2 and a second guide part 183b extending from the second guide part 183b and extending from the second width W2 And a third guide part 183c having a small third width W3.

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 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 the direction perpendicular to the inner surface of the second guide portion 183, may have a value of 25 mm or more and less than 31 mm. Further, the guide protrusion 184 forms an inclined surface 184a having a predetermined length.

Further, 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. The room air that has passed through the air blowing fan 120 flows along the inner side surface of the second guide portion 183 and travels on the inclined surface 184a of the guide projection 184 toward the discharge portion 195 Can be guided smoothly.

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

7 is a graph showing a comparison between an average noise sensed by the air conditioner to which the rear guide of the present invention is applied and an average noise sensed by 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 when the rear guide structure according to the first embodiment of the present invention is adopted is significantly smaller than the noise when employing the structure according to the prior art.

Specifically, the average noise detected by the air conditioner to which the rear guide provided with the guide protrusion 184 of the present invention is applied is confirmed to be reduced by at most 2 dBA from the average noise detected by the air conditioner to which the conventional rear guide is applied I could.

8 is a graph showing 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 by designing the protrusion height L of the guide protrusion 184 of the present invention to be different.

More specifically, when the protrusion height L of the guide protrusion 184 exceeds 25 mm, it is found that the noise reduction effect is remarkable. However, there is a problem that the projection height L of the guide projection 184 is difficult to exceed 31 mm due to the limitation of the discharge channel space of the air conditioner. Therefore, in the present invention, it is proposed to design the projection height L of the guide projection 184 to be 25 mm or more and less than 31 mm.

As described above, it was confirmed that by designing the protrusion height of the guide protrusion to be optimum, the air flow resistance of the discharge passage can be minimized and the abnormal noise can be remarkably reduced.

9 is a cross-sectional perspective view showing a suction flow 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 curvature portions having different curvatures.

Specifically, the suction flow guide 170 includes a first part 175 extending roundly upward from an end of the front panel 190 or the filter mounting part 150, And a second part 177 extending upwardly from the first part 176. [

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 formed to be convexly rounded and the other part may be formed to be rounded concavely.

That is, the first part 175 may be rounded upwardly toward the PCB device 200, and the second part 177 may be rounded upward toward the PCB device 200, (200). Therefore, the suction passage guide 170 may be formed to have a wavy cross section as a whole.

In this way, since the inside surface of the suction flow guide 170 through which the room air flows is rounded, the sucked indoor air is guided to the heat exchanger 110 by the rounded wall surface of the suction flow guide 170, Lt; / RTI > Therefore, the air flow resistance is reduced and the suction flow rate is increased.

Since the first part 175 which is a part of the suction flow guide 170 is rounded into the space 105 between the PCB device 200 and the suction part 193, The cross-sectional area is widened.

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

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

The suction flow guide 170 may include a curved surface portion 179 formed to be rounded from the end of the front panel 190 or the filter mounting portion 150 toward the PCB device 200. The curved surface portion 179 is disposed to connect the PCB device 200 to the front panel 190 or the filter mounting portion 150 so that a gap between the PCB device 200 and the suction portion 193 The space portion 105 can be shielded. One end of the curved surface 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 having the above-described structure, the suction flow guide for guiding the flow of the sucked air from the suction part of the front panel is provided, thereby facilitating the flow in the air suction path. In addition, the vortex generated in the air intake passage is suppressed by the intake passage guide, thereby improving the noise and increasing the suction flow rate.

In addition, since the suction flow guide can be stably supported on the inside of the front panel and the PCB device, the suction flow guide can be prevented from falling off or being broken by the suction pressure of the air.

Further, the structure of the rear guide for guiding the flow of the air passing through the heat exchanger can smoothly flow the air in the air discharge passage. Further, there is an advantage in that the static pressure loss generated in the air discharge passage is minimized to reduce the flow velocity loss, and drastically reduce the abnormal noise due to the static pressure loss.

Claims (15)

A case which forms an internal space in which the blowing fan is provided;
A front panel coupled to the case and having a suction portion and a discharge portion;
A heat exchanger for heat-exchanging air sucked into the case and partitioning the internal space into a suction passage and a discharge passage; And
A rear guide installed in the discharge passage and guiding the air having passed through the heat exchanger to the discharge portion,
In the rear guide,
A first guide part for guiding air passing through the heat exchanger to a suction side of the blowing fan; And
A second guide portion extending roundly from the first guide portion and guiding the air discharged from the blowing fan to the discharge portion,
Wherein the second guide portion is formed with a guide protrusion protruding toward the blowing fan and extending in the longitudinal direction of the blowing fan. The method according to claim 1,
Wherein the guide protrusion is formed at an end of the second guide portion. The method according to claim 1,
And a guide protrusion protruding toward the suction side of the blowing fan is provided between the first guide portion and the second guide portion. The method of claim 3,
In the second guide portion,
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) larger than the first width (W2). 5. The method of claim 4,
In the second guide portion,
A third guide part extending from the second guide part and having the guide protrusion,
And the third width (W3) of the third guide part is smaller than the second width (W2). 6. The method of claim 5,
Wherein the guide protrusion is formed at an end of the third guide part. The method according to claim 1,
And the protrusion height (L) of the guide protrusion vertically projecting from the second guide portion has a value of 25 mm or more and less than 31 mm. The method according to claim 1,
A filter disposed on a suction side of the heat exchanger;
A filter mounting portion on which the filter is mounted;
A PCB device disposed in the suction passage; And
And a suction flow guide installed in the suction passage and extending from the filter mounting portion to the PCB device. 9. The method of claim 8,
A space defined between the PCB unit and the suction unit,
Wherein the suction flow guide is arranged to shield at least a part of the space portion. 10. The method of claim 9,
Wherein the suction flow guide is installed to extend from the front panel to the PCB unit. 11. The method of claim 10,
Wherein the suction flow guide extends roundly from the front panel toward the PCB device. 11. The method of claim 10,
Wherein the suction flow guide includes a first part extending from the front panel toward the PCB device and a second part extending from the end of the first part to the PCB device. 13. The method of claim 12,
Wherein an angle (A) formed by the first part with respect to the filter surface is smaller than an angle (B) formed by the second part with respect to the filter surface. 11. The method of claim 10,
Wherein the suction flow guide is detachably coupled to the filter mounting portion at one end and detachably coupled at the other end to the PCB device. 11. The method of claim 10,
Wherein the filter mounting portion is horizontally disposed on an outlet side of the suction portion.

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