JP7066422B2 - Ceiling embedded air conditioner - Google Patents

Description

The present invention relates to a ceiling-embedded air conditioner.

In the indoor unit of an air conditioner, when the indoor air is cooled by the heat exchanger during the cooling operation, the moisture in the indoor air condenses on the surface of the heat exchanger and drops into the drain pan. The drain water, which is the water collected in the drain pan, is sucked up from the drain pan by a pump and discharged to the outside through the drain pipe.

In the following Patent Documents 1 and 2, a partition wall is formed in the drain pan, and the drain water is directed to the drain pump through the opening groove portion (Patent Document 1) or the communication portion (Patent Document 2) formed in the partition wall. It is disclosed that it is guided by.

International Publication No. 2017/006466 Japanese Unexamined Patent Publication No. 2014-5796 Japanese Unexamined Patent Publication No. 2009-103383

A drain drain port is formed in the drain pan, and the drain water collected in the drain pan before delivery after the test run, or when the drain pipe is clogged or the drain pump fails, is passed through the drain drain port without using a pump. Can be dropped and discharged. The above-mentioned Patent Document 3 discloses that a drain port is formed in a drain pan.

Drainage from the drain drain port is not performed during normal operation, and during normal operation, a rubber stopper is inserted into the drain drain port, and drain water is discharged by the drain pump. The rubber stopper may be inserted from the bottom to the top, and the tip side may be provided so as to project upward from the bottom of the drain pan. In this case, the tip of the rubber stopper obstructs the flow of drain water to the drain pump.

The present invention has been made in view of such circumstances, and the drain water flowing inside the heat exchanger is provided in both the case of drainage from the drain drain port and the time of drainage by the pump. It is an object of the present invention to provide a ceiling-embedded air conditioner capable of smoothly discharging.

In order to solve the above problems, the ceiling-embedded air conditioner of the present invention employs the following means.
That is, the ceiling-embedded air conditioner according to the present invention includes a heat exchanger, a drain pan that receives the drain water dripping from the heat exchanger, and a pump that discharges the water accumulated in the drain pan. At the bottom, a convex portion protruding upward on which the heat exchanger is placed on the upper surface and a drainage port penetrating the drain pan are formed, and the drainage port is inserted from the bottom to the top, and the tip portion is formed. A concave first portion further provided with a plug portion protruding upward from the bottom portion of the drain pan, the convex portion connecting the inside and the outside with respect to the heat exchanger, and drain water flowing from the inside to the outside. A communication section and a second communication section are formed, the first communication section is provided at a position corresponding to the drainage port, and the second communication section is adjacent to the first communication section and separated from the drainage port. The drain water flow from the first communication portion to the pump is obstructed by the tip portion of the plug portion .

According to this configuration, a convex portion protruding upward is formed at the bottom of the drain pan, and a heat exchanger is placed on the upper surface of the convex portion. Further, a drain port penetrating the drain pan is formed at the bottom of the drain pan, and drain water can be discharged through the drain port. In the convex portion, a concave first communication portion and a second communication portion connecting the inside and the outside with respect to the heat exchanger are formed, and drain water flows through the heat exchanger via the first communication portion and the second communication portion. It circulates from the inside to the outside.

Since the first communication part is provided at the position corresponding to the drainage port, when draining water from the drainage port, the drain water flowing inside the heat exchanger passes directly after passing through the first communication part. Guided to the drain drain. As a result, when the drain water is discharged through the drain port, the drain water is discharged smoothly.

In addition, since the second communication section is provided at a position adjacent to the first communication section and separated from the drain port, when drain water is discharged by a pump during normal operation, it flows inside the heat exchanger. The drain water is guided to the pump after passing through the second communication portion which is not easily obstructed by the plug portion. As a result, when the drain water is discharged using the pump, the drain water is discharged smoothly.

According to this configuration, the plug portion is inserted into the drain port from the bottom to the top, and the plug portion is attached / detached from the lower surface side of the drain pan. Further, since the tip of the plug is projected upward from the bottom of the drain pan, the drain water can be discharged as compared with the case where the tip of the plug is at the same height as or lower than the bottom of the drain pan. Hard to leak.

In the above invention, the first communication portion and the second communication portion may be provided at the end of the region between the heat exchanger and the outlet or outside the region.

According to this configuration, the first communication section and the second communication section are formed at positions different from the main flow of the air flowing from the heat exchanger to the outlet, so that the first communication section and the second communication section are formed. Less air passes, that is, bypasses the heat exchanger.

According to the present invention, the drain water flowing inside the heat exchanger can be smoothly discharged in both the case of drainage from the drain drain port and the time of drainage by the pump.

It is a bottom view which shows the indoor unit of the ceiling-embedded air conditioner which concerns on one Embodiment of this invention. It is a vertical sectional view cut along line II-II of FIG. It is a vertical sectional view which shows the indoor unit which concerns on one Embodiment of this invention. It is a side view which shows the indoor unit which concerns on one Embodiment of this invention. It is a top view which shows the drain pan which concerns on one Embodiment of this invention. It is a partially enlarged plan view which shows the drain pan which concerns on one Embodiment of this invention.

The ceiling-embedded air conditioner according to the embodiment of the present invention will be described below with reference to the drawings.
The ceiling-embedded air conditioner (hereinafter referred to as "air conditioner") is a refrigerant pipe (not shown) connecting the indoor unit 1, the outdoor unit (not shown), and the indoor unit 1 and the outdoor unit. And so on.
The indoor unit 1 is installed with the case body 2 embedded in the ceiling. As shown in FIG. 2, a heat exchanger 7, a drain pan 10, a motor 5, a blower 6, a bell mouth 12, etc. are built in the case body 2, and the lower part of the case body 2 is exposed to the ceiling surface. The ceiling panel 8 is attached. FIG. 1 is a bottom view of the indoor unit 1 as viewed from the indoor side, that is, as seen from the lower surface of the indoor unit 1, and FIG. 2 is a vertical sectional view taken along the line II-II of FIG.

The drain pan 10 is provided in the lower part of the heat exchanger 7 and receives the drain water dripping from the heat exchanger 7. The bell mouth 12 is provided at the bottom of the drain pan 10. A suction port 3 is formed in the central portion of the lower surface of the indoor unit 1, and an outlet 4 is formed adjacent to the suction port 3 along the outer peripheral portion of the lower surface of the indoor unit 1. A suction grill 11 and a filter 13 are installed above the suction grill 11 at the suction port 3.

When the air conditioner operates, the refrigerant from the outdoor unit (not shown) circulates in the heat exchanger 7, and the blower 6 is driven by the motor 5. By driving the blower 6, indoor air passes through the suction grill 11 and the filter 13 from the suction port 3, is guided by the bell mouth 12, and is sucked into the blower 6. Then, the sucked air is cooled or heated by passing through the heat exchanger 7, and then is blown into the room from the outlet 4.

As shown in FIG. 3, a pump 14 is installed in one corner of the drain pan 10. When the air conditioner is operating, the pump 14 sucks up the drain water accumulated in the drain pan 10 and discharges the drain water to the outside through the drain pipe 15. As shown in FIGS. 3 and 4, the drain pipe 15 has rising portions 15a, 15b, 15c vertically raised outside the case body 2, and a gentle downward inclination from the highest position of the drain pipe 15. It is provided with an inclined portion 15d installed so as to have the above, and is installed in the ceiling. FIG. 3 is a vertical cross-sectional view of the case body 2 of the indoor unit 1 so that the position of the pump 14 can be seen, and FIG. 4 is a side view showing the indoor unit 1.

In the air conditioner, when the indoor air is cooled by the heat exchanger 7 during the cooling operation, the moisture in the indoor air condenses on the surface of the heat exchanger 7 and drops into the drain pan 10. The drain water, which is the water collected in the drain pan 10, is sucked up from the drain pan 10 by the pump 14 and discharged to the outside through the drain pipe 15.

Next, the drain pan 10 will be described.
The drain pan 10 is made of styrofoam, for example, and the surface on which the drain water is stored is coated with a waterproof paint. As shown in FIG. 5, the plan view shape of the drain pan 10 is substantially quadrangular. The drain pan 10 is formed with openings 16 and 17 corresponding to the suction port 3 and the outlet port 4. The bottom portion 10a of the drain pan 10 is provided along the lower portion of the heat exchanger 7 arranged so as to surround the blower 6 over the entire area where the heat exchanger 7 is installed. FIG. 5 is a plan view showing the drain pan 10.

As shown in FIG. 3, the bottom portion 10a of the drain pan 10 is formed so as to be inclined so that the installation position of the pump 14 is the lowest. The bottom portion 10a corresponding to the installation position of the pump 14 is formed in a concave shape deeper than the surroundings so that the pump 14 can easily suck up the drain water.

As shown in FIG. 2, a concave drain groove 18 is formed in the drain pan 10, and drain water collects inside the drain groove 18. As shown in FIGS. 2 and 5, the drain groove 18 is formed inside the heat exchanger 7, that is, on the inlet side of the heat exchanger 7, with respect to the inner peripheral wall portion 18a and the heat exchanger 7. It has an outer peripheral wall portion 18b formed on the outside, that is, on the outlet side of the heat exchanger 7. As shown in FIG. 5, the inner peripheral wall portion 18a is provided along the opening 16 formed corresponding to the suction port 3. The outer peripheral wall portion 18b is provided along the opening 17 formed corresponding to the outlet 4.

As shown in FIG. 2, the drain groove 18 accommodates the lower portion of the heat exchanger 7, and the height position of the lower end of the heat exchanger 7 is lower than the upper end of the drain groove 18. As a result, the outer peripheral wall portion 18b of the drain groove 18 prevents the drain water adhering to the lower part of the heat exchanger 7 from scattering to the outside.

As shown in FIGS. 2, 3 and 5, a convex portion 19 protruding upward is formed on the bottom portion 10a of the drain pan 10. The heat exchanger 7 is placed on the upper surface of the convex portion 19. The convex portion 19 is formed along the bottom surface of the heat exchanger 7 and corresponding to the shape of the bottom surface of the heat exchanger 7 so that a gap between the protrusion and the heat exchanger 7 is not formed as much as possible.

In the above-mentioned drain pan 10, it is desirable that the bottom portion 10a is formed at a position where the outer bottom portion 10a is lower than the inner bottom portion 10a with respect to the heat exchanger 7, as shown in FIG. As a result, the water collected in the drain pan 10 is easily guided from the inside to the outside with respect to the heat exchanger 7. Further, in the indoor unit 1, the blower 6 is arranged inside the heat exchanger 7, and the air flow by the blower 6 goes from the inside to the outside with respect to the heat exchanger 7 and therefore collects in the drain pan 10. The drain water is also easily discharged from the inside to the outside of the heat exchanger 7 by the wind power.

As shown in FIGS. 2 and 3, an insulation 20 is installed between the lower portion of the heat exchanger 7 and the upper surface of the convex portion 19. As a result, the space between the heat exchanger 7 and the convex portion 19 is closed by the insulation 20, so that the air that does not pass through the heat exchanger 7 but passes through the gap and flows from the inside to the outside of the heat exchanger 7 is reduced. can. Further, since the insulation 20 is installed between the lower portion of the heat exchanger 7 and the upper surface of the convex portion 19, the insulation 20 is housed in the drain groove 18. Therefore, the drain water dripping from the heat exchanger 7 and adhering to the insulation 20 is also prevented from scattering to the outside.

Hereinafter, the two communication portions 23 formed in the convex portion 19 will be described with reference to FIGS. 5 and 6.
A drain drain port 21 is formed in the drain pan 10 separately from the position where the pump 14 is installed. The drain drain port 21 is a hole formed by penetrating the drain pan 10 in the vertical direction. During normal operation, the rubber stopper 22 is inserted into the drain drain port 21. The rubber stopper 22 is inserted into the drain drain port 21 from the bottom to the top, and the rubber stopper 22 is attached / detached from the lower surface side of the drain pan 10, that is, the lower surface side of the indoor unit 1.

When the rubber stopper 22 is inserted, the tip end side of the rubber stopper 22 is provided so as to project upward from the bottom portion 10a of the drain pan 10. As a result, the drain water is less likely to leak as compared with the case where the tip end portion of the rubber stopper 22 or other stopper member has the same height as or lower than the bottom portion 10a of the drain pan 10.

By removing the rubber stopper 22 from the drain drain port 21, the drain water collected in the drain pan 10 before delivery after the test run, or when the drain pipe 15 is clogged or the pump 14 fails is drained without using the pump 14. It can be dropped and discharged through the mouth 21.

The drain drain port 21 is formed, for example, on the outside of the heat exchanger 7 of the convex portion 19, that is, on the pump 14 side, in the vicinity of the convex portion 19. The drain drain port 21 is formed in the same corner region of the drain pan 10 as the corner of the drain pan 10 in which the pump 14 is installed. As described above, the bottom portion 10a of the drain pan 10 is formed so as to be inclined so that the installation position of the pump 14 is the lowest. Therefore, by forming the drain drain port 21 in the same area as the area where the pump 14 is installed, the drain water can be reliably discharged from the drain drain port 21.

The convex portion 19 is formed with a plurality of communication portions 23 that connect the inside and the outside of the heat exchanger 7, that is, the inlet side and the outlet side of the heat exchanger 7, and allow drain water to flow from the inside to the outside. .. The communication portion 23 is formed in a concave shape at the convex portion 19. The bottom of the communication portion 23 is at the same height as the bottom 10a of the drain pan 10.

The communication portions 23 are formed at a plurality of locations on the convex portions 19. The width of the communication portion 23 is a size that allows drain water to flow, and is set so that the amount of air that passes through the communication portion 23 and bypasses the heat exchanger 7 is reduced. Further, it is preferable that the communication portion 23 is provided at the end of the region between the heat exchanger 7 and the outlet 4, or outside the region. As a result, the communication portion 23 is formed at a position different from the main flow of the air flowing from the heat exchanger 7 toward the outlet 4, so that the air that passes through the communication portion 23 and bypasses the heat exchanger 7 is formed. Less.

In the vicinity of the pump 14 and the drain drain port 21, the first communication portion 23A and the second communication portion 23B of the communication portions 23 are formed.

The first communication portion 23A is provided at a position corresponding to the drain drain port 21. As described above, the drain drain port 21 is formed on the outside of the heat exchanger 7 of the convex portion 19, that is, on the pump 14 side, in the vicinity of the convex portion 19. Therefore, the first communication portion 23A is provided at a position near the drain drain port 21 and facing the drain drain port 21. As a result, when the drain water is discharged from the drain drain port 21, the drain water flowing inside the heat exchanger 7 is directly guided to the drain drain port 21 after passing through the first communication portion 23A. As a result, when the drain water is discharged through the drain drain port 21, the drain water is smoothly discharged.

The second communication portion 23B is provided at a position adjacent to the first communication portion 23A and separated from the drain drain port 21. During normal operation in which the drain water is not drained by the drain drain port 21, the drain water is drained using the pump 14. In this case, the rubber stopper 22 is inserted into the drain drain port 21, and the tip end side of the rubber stopper 22 protrudes upward from the bottom portion 10a of the drain pan 10. Therefore, the tip of the rubber stopper 22 obstructs the flow of drain water to the pump 14.

Since the second communication portion 23B is provided at a position separated from the drain drain port 21, when the drain water is discharged by the pump 14 during normal operation, the drain water flowing inside the heat exchanger 7 is drained. Is likely to be guided to the pump 14 after passing through the second communication portion 23B, which is not easily hindered by the rubber stopper 22.

On the other hand, when only the first communication portion 23A is formed and the second communication portion 23B is not formed, the flow of the drain water is obstructed by the tip portion of the rubber stopper 22 during normal operation, and the drain water is drained to the pump 14. Is difficult to guide. Further, when only the second communication portion 23B is formed and the first communication portion 23A is not formed, the flow path from the inside to the drain drain port 21 becomes longer with respect to the heat exchanger 7, and the drain drain port 21 is drained. Water is difficult to guide.

On the other hand, according to the present embodiment, heat exchange occurs in both the case where the drain water is discharged from the drain drain port 21 without using the pump 14 and the case where the drain water is discharged by the pump 14 during normal operation. The drain water flowing inside the vessel 7 is easily guided to the outside with respect to the heat exchanger 7. When the pump 14 is not used, the drain water is easily discharged from the drain drain port 21, and when the pump 14 is used, the drain water is easily guided to the pump 14.

1: Indoor unit 2: Case body 3: Suction port 4: Blowout port 5: Motor 6: Blower 7: Heat exchanger 8: Ceiling panel 10: Drain pan 10a: Bottom 11: Suction grill 12: Bellmouth 13: Filter 14: Pump 15: Drain pipe 15a, 15b, 15c Rising part 15d: Inclined part 16, 17: Opening 18: Drain groove 18a: Inner peripheral wall part 18b: Outer peripheral wall part 19: Convex part 20: Insulation 21: Drain drain port 22 : Rubber stopper 23: Communication part 23A: First communication part 23B: Second communication part

Claims (2)

With a heat exchanger,
A drain pan that receives the drain water dripping from the heat exchanger, and
A pump that discharges the water accumulated in the drain pan,
Equipped with
At the bottom of the drain pan, a convex portion protruding upward on which the heat exchanger is placed and a drain port penetrating the drain pan are formed.
Further provided with a stopper that is inserted into the drainage port from bottom to top and whose tip is projected upward from the bottom of the drain pan.
The convex portion connects the inside and the outside with respect to the heat exchanger, and a concave first communication portion and a second communication portion through which drain water flows from the inside to the outside are formed.
The first communication portion is provided at a position corresponding to the drainage port.
The second communication portion is provided at a position adjacent to the first communication portion and separated from the drain port .
A ceiling-embedded air conditioner in which the flow of the drain water from the first communication portion to the pump is obstructed by the tip portion of the plug portion . The ceiling-embedded air conditioner according to claim 1, wherein the first communication section and the second communication section are provided at the end of a region between the heat exchanger and the outlet or outside the region.

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