Air conditioner

Abstract

To provide an air conditioner that improves safety.SOLUTION: An air conditioner according to the present disclosure uses a refrigerant having combustibility, and comprises: an outdoor machine comprising an outdoor heat exchanger, a compressor, and an expansion valve; an indoor machine comprising a case arranged in such a manner that a back surface faces a wall surface in a room, and an indoor heat exchanger for exchanging heat with indoor air; a refrigerant pipe connecting the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger, and in which the refrigerant is circulated; and an air flow restraining part arranged inside the indoor machine and in a path for air flowing from the indoor heat exchanger toward a space provided on the side of the back surface, and restraining an air flow toward the space.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an air conditioner. [Background technology]

[0002] BACKGROUND ART Refrigeration cycle devices using a flammable refrigerant are known. For example, Patent Document 1 discloses a refrigeration cycle device including a refrigerant circuit that circulates a flammable refrigerant, an indoor unit having a housing that houses a load-side heat exchanger of the refrigerant circuit, and a control unit that controls the indoor unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2017 / 187618 Summary of the Invention [Problem to be solved by the invention]

[0004] The refrigeration cycle device of Patent Document 1 has a problem in terms of safety.

[0005] The present disclosure provides an air conditioner with improved safety. [Means for solving the problem]

[0006] The air conditioner of the present disclosure comprises: An air conditioner that uses a flammable refrigerant, an outdoor unit having an outdoor heat exchanger, a compressor, and an expansion valve; an indoor unit having a housing arranged with its back surface facing a wall surface inside the room and an indoor heat exchanger that exchanges heat with indoor air; a refrigerant pipe that connects the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger and through which a refrigerant circulates; an airflow suppression unit that is disposed inside the indoor unit on a path of air flowing from the indoor heat exchanger toward a space provided on the rear side and that suppresses airflow toward the space; Equipped with. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an air conditioner with improved safety. [Brief explanation of the drawings]

[0008] [Figure 1] Schematic diagram of an air conditioner according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view showing the appearance of the indoor unit of the air conditioner of FIG. 1. [Figure 3] Schematic diagram showing the internal structure of the indoor unit in Figure 2 [Figure 4] Schematic diagram of the indoor unit in Figure 2 viewed from the direction of the first surface of the housing [Figure 5] FIG. 1 is a schematic diagram showing an indoor unit of an air conditioner according to a first modification of the first embodiment. [Figure 6] FIG. 10 is a schematic diagram showing an indoor unit of an air conditioner according to a second modification of the first embodiment. [Figure 7] 10 is a schematic diagram showing an indoor unit of an air conditioner according to a third modification of the first embodiment. [Figure 8] Schematic diagram showing an indoor unit of an air conditioner according to a second embodiment. [Figure 9] FIG. 10 is a schematic diagram showing an indoor unit of an air conditioner according to a first modification of the second embodiment. [Figure 10] Block diagram showing an air conditioner according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Background to this disclosure) In air conditioners, refrigerants such as R410A or R32 are widely used. However, from the perspective of preventing global warming, there is a demand for the use of refrigerants with a lower global warming potential (GWP).

[0010] The use of propane, for example, as a refrigerant with a low GWP is being considered. Because refrigerants such as propane are flammable, if a refrigerant leaks from an indoor unit, for example, a flammable concentration range may be formed indoors, posing a safety issue. Therefore, measures are needed to prevent a flammable concentration range from being formed indoors even if a refrigerant leaks. A flammable concentration range is a range in which a flammable mixture of refrigerant and air exists.

[0011] The inventor(s) have considered ways to improve safety by using an indoor fan to diffuse the refrigerant throughout the room in the event of a refrigerant leak inside the indoor unit, thereby preventing the formation of a flammable concentration range indoors, and have arrived at the following invention.

[0012] Hereinafter, embodiments of the present disclosure will be described, occasionally with reference to the drawings. However, the following embodiments are merely examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following content (e.g., the shape, dimensions, and arrangement of each component). Positional relationships, such as up, down, left, and right, are based on the positional relationships shown in the drawings, unless otherwise specified. Each figure described in the following embodiments is a schematic diagram, and the ratios of the size and thickness of each component in each figure do not necessarily reflect the actual dimensional ratios. Furthermore, the dimensional ratios of each element are not limited to the ratios shown in the drawings.

[0013] In the following description, when it is necessary to distinguish between multiple components, prefixes such as "first" and "second" are added to the names of the components. However, when the components can be distinguished from each other by the symbols attached to them, the prefixes such as "first" and "second" may be omitted in consideration of readability of the text.

[0014] (Embodiment 1) [Overall configuration] FIG. 1 is a schematic diagram of an air conditioner 10 according to a first embodiment of the present disclosure. FIG. 2 is a perspective view showing the appearance of an indoor unit 20 of the air conditioner 10 of FIG. 1. FIG. 3 is a schematic diagram showing the internal structure of the indoor unit 20 of FIG. 2. FIG. 4 is a schematic diagram of the indoor unit 20 of FIG. 2 as viewed from the direction of the first surface 21c of the housing 21. Note that the XYZ Cartesian coordinate system shown in the figure is intended to facilitate understanding of the present disclosure and does not limit the embodiments of the present disclosure. The X-axis direction indicates the depth direction of the indoor unit 20, the Y-axis direction indicates the width direction of the indoor unit 20, and the Z-axis direction indicates the length direction of the indoor unit 20.

[0015] As shown in Figures 1 to 3, the air conditioner 10 of this embodiment comprises an indoor unit 20 arranged in the room Rin to be air-conditioned, an outdoor unit 30 arranged in the outdoor Rout, refrigerant piping 50, and an airflow suppression unit 80.

[0016] As shown in Fig. 1, the outdoor unit 30 has an outdoor heat exchanger 32, a compressor 36, and an expansion valve 38. The indoor unit 20 has a housing 21 and an indoor heat exchanger 22. The indoor unit 20 is arranged so that the back surface 21a of the housing 21 faces the wall surface W1 of the indoor Rin. Refrigerant piping 50 connects the outdoor heat exchanger 32, the compressor 36, the expansion valve 38, and the indoor heat exchanger 22. A refrigerant circulates through the refrigerant piping 50. In this embodiment, a flammable refrigerant such as propane (R290), isobutane (R600a), or ethane (R170) is used as the refrigerant.

[0017] As shown in FIG. 2, the housing 21 of the indoor unit 20 has a back surface 21a facing the wall surface W1, a front surface 21b opposite the back surface 21a, and a first surface 21c and a second surface 21d connecting the back surface 21a and the front surface 21b. Furthermore, the housing 21 has a top surface 21e and a bottom surface, and is formed in a box shape. As shown in FIGS. 1 and 3, the housing 21 of the indoor unit 20 is provided with an indoor heat exchanger 22 that exchanges heat with the indoor air A1, and an indoor fan 24 that draws the indoor air A1 into the indoor unit 20 and blows the indoor air A1 after heat exchange with the indoor heat exchanger 22 into the room Rin. Also, as shown in FIGS. 2 and 3, an airflow suppression unit 80 is provided inside the housing 21 of the indoor unit 20. In this embodiment, the airflow suppression unit 80 is provided inside the housing 21 and is a component for controlling the airflow inside the indoor unit. The airflow suppression unit 80 will be described in detail below.

[0018] The outdoor unit 30 is provided with an outdoor heat exchanger 32 that exchanges heat with outdoor air A2, and a fan 34 that draws the outdoor air A2 into the outdoor unit 30 and blows the outdoor air A2 out to the outdoor Rout after exchanging heat with the outdoor heat exchanger 32. The outdoor unit 30 is also provided with a compressor 36, an expansion valve 38, and a four-way valve 40 that execute a refrigeration cycle with the indoor heat exchanger 22 and the outdoor heat exchanger 32.

[0019] The indoor heat exchanger 22, the outdoor heat exchanger 32, the compressor 36, the expansion valve 38, and the four-way valve 40 are each connected by a refrigerant pipe 50 through which a refrigerant circulates. In this embodiment, as shown in FIG. 3 , the refrigerant pipe 50 includes a plurality of heat transfer tubes 52 arranged inside the housing 21 of the indoor unit, a plurality of first bend pipes 54 connecting one ends 52a of the plurality of heat transfer tubes together, and a plurality of second bend pipes 56 connecting the other ends 52b of the plurality of heat transfer tubes 52 together. The first bend pipe 54 and the second bend pipe 56 are components that connect the plurality of heat transfer tubes 52. The bend pipes 54, 56 have, for example, a U-shaped curve.

[0020] In this embodiment, when viewed from a direction perpendicular to the front surface 21b of the housing 21, a motor 70 for rotating the indoor fan 24 is disposed outside the second bend pipe 56. The indoor fan 24 can be rotated by the motor 70.

[0021] As shown in FIG. 4, inside the indoor unit 20, there is a space Sp1 on the rear surface 21a side of the housing 21, where the indoor heat exchanger 22 and the indoor fan 24 are not located. If refrigerant leaks from the connection between the bend pipes 54, 56 and the heat transfer pipe 52, the leaked refrigerant may flow from the vicinity of the bend pipes 54, 56 toward the space Sp1. In particular, between the indoor heat exchanger 22 or the indoor fan 24 and the first surface 21c of the housing 21, i.e., the portion where the first bend pipe 54 is located, the motor 70 is not located and the air path is wide. Therefore, if refrigerant leaks near the first bend pipe 54, the leaked refrigerant is likely to flow into the space Sp1. If the refrigerant flows toward the space Sp1, the refrigerant concentration in the space Sp1 increases, and the highly concentrated refrigerant may flow out of the housing 21 along the wall surface W1 of the room Rin, forming a flammable concentration region on the wall surface W1. In this embodiment, an airflow suppressor 80 is disposed inside the housing 21 to suppress the leaking refrigerant from flowing into the space Sp1 on the rear surface 21a side of the housing 21.

[0022] The airflow suppression section 80 is disposed inside the indoor unit 20 in the path of air flowing from the indoor heat exchanger 22 toward the space Sp1 provided on the rear surface 21a side, and suppresses the airflow toward the space Sp1. In the present embodiment, the airflow suppression section 80 is disposed between the first bend pipe 54 and the first surface 21c of the housing 21, and includes a plate-shaped first member 81 extending in the direction in which the first surface 21c extends.

[0023] The first member 81 is a plate-like member made of, for example, a material such as resin or metal. When viewed from a direction perpendicular to the first surface 21c of the housing 21, the first member 81 may be formed to be larger than the indoor heat exchanger 22. By forming the first member 81 to be larger than the indoor heat exchanger 22 when viewed from a direction perpendicular to the first surface 21c, as shown in FIG. 3 , the inside of the housing 21 can be divided into regions 26 and 27, and the airflow from region 26 to region 27 can be suppressed.

[0024] The provision of the first member 81 forms an airflow A1 that flows from the portion where the first bend pipe 54 is located, collides with the first member 81, and heads toward the center of the housing 21. Even if refrigerant leaks near the first bend pipe 54, the airflow A1 causes the leaked refrigerant to flow toward the center of the housing 21, allowing the indoor fan 24 to discharge the refrigerant toward the room Rin. The refrigerant mixes with the air flowing in the airflow A1, which effectively reduces the refrigerant concentration. Discharging the reduced-concentration refrigerant into the room Rin allows the refrigerant to diffuse into the room Rin, further reducing the refrigerant concentration in the room Rin. Furthermore, the provision of the first member 81 can also suppress the flow of refrigerant into the space Sp1 provided on the rear surface 21a of the housing 21. This prevents the refrigerant from flowing from the rear surface 21a toward the wall surface W1, thereby preventing a flammable concentration range from being formed on the wall surface W1.

[0025] [effect] According to the above-described embodiment, the following effects can be achieved.

[0026] The air conditioner 10 uses a flammable refrigerant and includes an outdoor unit 30, an indoor unit 20, refrigerant piping 50, and an airflow suppression unit 80. The outdoor unit 30 has an outdoor heat exchanger 32, a compressor 36, and an expansion valve 38. The indoor unit 20 has a housing 21 with its back surface 21a facing the wall surface W1 of the indoor Rin, and an indoor heat exchanger 22 that exchanges heat with indoor air A1. The refrigerant piping 50 connects the outdoor heat exchanger 32, the compressor 36, the expansion valve 38, and the indoor heat exchanger 22, and refrigerant circulates through the housing 21. The airflow suppression unit 80 is disposed inside the indoor unit 20 in the path of air flowing from the indoor heat exchanger 22 toward a space Sp1 provided on the back surface 21a side, and suppresses airflow into the space Sp1.

[0027] With this configuration, it is possible to provide an air conditioner with improved safety by suppressing the formation of a flammable concentration range even in the event of a refrigerant leak. By arranging the airflow suppression section 80 inside the indoor unit 20, it is possible to suppress the refrigerant from flowing into the space Sp1 on the back surface 21a side of the housing 21. This makes it possible to suppress the refrigerant from flowing out along the wall surface W1 and forming a flammable concentration range on the wall surface W1.

[0028] The refrigerant piping 50 has a plurality of heat transfer pipes 52 arranged inside the housing 21 of the indoor unit 20, and a plurality of first bend pipes 54 connecting one ends 52a of the heat transfer pipes 52. The airflow suppression unit 80 is arranged between the plurality of first bend pipes 54 and a first surface 21c of the housing 21 facing the plurality of first bend pipes 54, and includes a plate-shaped first member 81 extending in the direction of extension of the first surface 21c.

[0029] With this configuration, it is possible to form an airflow A1 that collides with the first member 81 from the portion where the first bend pipe 54 is disposed and moves toward the center of the housing 21. By forming the airflow A1, even if a refrigerant leak occurs near the first bend pipe 54, it is possible to prevent the refrigerant from flowing into the space Sp1 provided in the rear surface 21a. This makes it possible to prevent a flammable concentration region from being formed on the wall surface W1.

[0030] In the above-described embodiment, an example has been described in which the indoor fan 24 and the motor 70 are arranged in the indoor unit 20, but the indoor fan 24 and the motor 70 are not essential components of the air conditioner 10.

[0031] [Variations] FIG. 5 is a schematic diagram showing an indoor unit 20A of an air conditioner according to a first modification of the first embodiment. As shown in FIG. 5, the first member 82 may have a plate-shaped main body 82a and a return portion 82b extending from an end 82c of the main body 82a in a direction intersecting with the first surface 21c. The direction intersecting with the first surface 21c may be, for example, a direction perpendicular to the first surface 21c. In other words, the first member 82 has the return portion 82b protruding from the end 82c of the main body 82a toward the region 26 of the housing 21. The return portion 82b may also be formed along the outer edge of the first member 82. The first member 82 having the return portion 82b facilitates the formation of an airflow that collides with the main body 82a of the first member 82 and moves toward the center of the housing 21. This more efficiently prevents a flammable concentration region from being formed on the wall surface W1.

[0032] FIG. 6 is a schematic diagram showing an indoor unit 20B of an air conditioner according to a second modification of the first embodiment. As shown in FIG. 6, the airflow suppression section 80 may have a sealing member 90 arranged on an outer edge 83a of the first member 83. The sealing member 90 seals between the first member 83 and the housing 21. The sealing member 90 may be formed in a ring shape and arranged around the outer edge of the first member 83. The sealing member 90 may be made of an elastic material such as rubber. By providing the sealing member 90, the flow of air from the region 26 to the region 27 inside the housing 21 can be more reliably suppressed.

[0033] FIG. 7 is a schematic diagram showing an indoor unit 20C of an air conditioner according to a third modification of the first embodiment. As shown in FIG. 7, the indoor unit 20C is disposed below the indoor heat exchanger 22 and further includes a water tray 91 that collects drain water condensed in the indoor heat exchanger 22. The first member 84 is disposed so that at least a portion thereof abuts against the water tray 91. By disposing the first member 84 so that at least a portion thereof abuts against the water tray 91, the internal space of the housing 21 can be divided into an area 28 that includes the inside of the water tray 91 and an area 29 that includes the space Sp1 described in FIG. 4. This makes it possible to prevent leaked refrigerant from flowing into the space Sp1.

[0034] (Embodiment 2) A second embodiment will be described with reference to Fig. 8. In the second embodiment, the same or equivalent configurations as those in the first embodiment will be denoted by the same reference numerals. In the second embodiment, descriptions that overlap with those in the first embodiment will be omitted.

[0035] Fig. 8 is a schematic diagram showing an indoor unit 20D of an air conditioner according to embodiment 2. As shown in Fig. 8, this embodiment differs from embodiment 1 in that the airflow suppression section 80 includes a second member 85 that is arranged in the path of air that flows from the second bend pipe 56 toward the lower part on the rear surface 21a side.

[0036] The second member 85 is a plate-shaped member and can be formed from, for example, a material such as resin or metal. In this embodiment, the second member 85 is disposed so as to extend parallel to the XY plane. The space between the second bend pipe 56 and the motor 70 is connected to the space Sp1 on the rear surface 21a side. Therefore, by disposing the second member 85 in this gap, it is possible to prevent refrigerant leaking near the second bend pipe 56 from flowing into the space on the rear surface 21a side.

[0037] In particular, when the refrigerant is heavier than air, the refrigerant can be more efficiently prevented from flowing into space Sp1 by covering the lower part of the gap between second bend pipe 56 and motor 70 with second member 85, as shown in Fig. 8. For example, when leaked refrigerant falls toward second member 85 due to gravity, the refrigerant flows toward the center of housing 21, as shown by arrow A2 in Fig. 8. The refrigerant that has flowed toward the center of housing 21 is diffused into room Rin by the airflow generated by indoor fan 24.

[0038] [Variations] 9 is a schematic diagram showing an indoor unit 20E of an air conditioner according to Modification 1 of Embodiment 2. As shown in FIG. 9, the second member 86 may be disposed in the gap between the water tray 91 and the housing 21.

[0039] Since the gap between the water tray 91 and the housing 21 is connected to the space Sp1 on the rear surface 21a side, by placing the second member 86 between the water tray 91 and the housing 21, the refrigerant can be prevented from flowing toward the rear surface 21a side.

[0040] (Embodiment 3) A third embodiment will be described with reference to Fig. 10. In the third embodiment, the same or equivalent configurations as those in the first embodiment will be denoted by the same reference numerals. In the third embodiment, descriptions that overlap with those in the first embodiment will be omitted.

[0041] Fig. 10 is a block diagram showing an air conditioner 10A according to embodiment 3. As shown in Fig. 10, the air conditioner 10A differs from embodiment 1 in that it further includes a control unit 71 and the indoor unit 20F further includes a sensor 72.

[0042] The control unit 71 controls the outdoor unit 30 and the indoor unit 20F. The control unit 71 includes, for example, a memory that stores programs and a processing circuit corresponding to a processor such as a CPU (Central Processing Unit). The functions of the control unit 71 may be configured using hardware alone, or may be realized by combining hardware and software. The control unit 71 realizes predetermined functions by reading data and programs stored in the memory and performing various arithmetic processing.

[0043] The sensor 72 is a sensor that can detect the refrigerant gas inside the housing 21. As the sensor 72, for example, a gas sensor that can detect the concentration of the refrigerant gas in the air can be used.

[0044] The control unit 71 operates the indoor fan 24 when the sensor 72 detects refrigerant gas inside the housing 21. By operating the indoor fan 24 when the sensor 72 detects refrigerant gas, the leaked refrigerant can be diffused into the room Rin. Alternatively, the control unit 71 may increase the airflow rate of the indoor fan 24 when the sensor 72 detects refrigerant gas. By increasing the airflow rate of the indoor fan 24, the refrigerant gas inside the housing 21 can be efficiently diffused into the room Rin.

[0045] (Outline of the embodiment) (1) The air conditioner disclosed herein is an air conditioner that uses a flammable refrigerant and includes an outdoor unit having an outdoor heat exchanger, a compressor, and an expansion valve; an indoor unit having a housing with its back facing a wall of the room and an indoor heat exchanger that exchanges heat with the indoor air; refrigerant piping that connects the outdoor heat exchanger, compressor, expansion valve, and indoor heat exchanger and through which the refrigerant circulates; and an airflow suppression unit that is located inside the indoor unit in the path of air flowing from the indoor heat exchanger toward a space provided on the back side and that suppresses airflow into the space.

[0046] (2) In the air conditioner of (1), the refrigerant piping may have a plurality of heat transfer pipes arranged within the housing of the indoor unit and a plurality of first bend pipes connecting one ends of the plurality of heat transfer pipes, and the airflow suppression unit may include a plate-shaped first member arranged between the plurality of first bend pipes and a first surface of the housing facing the plurality of first bend pipes and extending along the extension direction of the first surface.

[0047] (3) In the air conditioner of (2), the first member may have a plate-shaped main body and a return portion extending from an end of the main body in a direction intersecting with the first surface.

[0048] (4) In the air conditioner of (2) or (3), the airflow suppression section may have a sealing member arranged on the outer edge of the first member, and the sealing member may seal between the first member and the housing.

[0049] (5) In the air conditioner of any one of (2) to (4), the indoor unit may further have a water tray arranged below the indoor heat exchanger for storing drain water condensed in the indoor heat exchanger, and the first member may be arranged so that at least a portion of the first member abuts against the water tray.

[0050] (6) In the air conditioner of any one of (2) to (5), the first member may be larger than the indoor heat exchanger when viewed in a direction perpendicular to the first surface.

[0051] (7) In any one of the air conditioners (1) to (6), the refrigerant piping may have a plurality of heat transfer pipes arranged within the housing of the indoor unit and a plurality of second bend pipes connecting the other ends of the plurality of heat transfer pipes, and the airflow suppression unit may include a second member arranged in the path of air flowing from the second bend pipes toward the lower part on the rear side.

[0052] (8) In the air conditioner of (7), the indoor unit may further have a water tray arranged below the indoor heat exchanger for storing drain water condensed in the indoor heat exchanger, and the second member may be arranged in the gap between the water tray and the plurality of second bend pipes.

[0053] (9) In any one of the air conditioners (1) to (8), a control unit is further provided for controlling the outdoor unit and the indoor unit, and the indoor unit further has an indoor fan that draws indoor air into the housing and a sensor that detects refrigerant gas inside the housing, and the control unit may operate the indoor fan when the sensor detects refrigerant gas. [Industrial Applicability]

[0054] The present disclosure can be widely applied to air conditioners that use flammable refrigerants. [Explanation of symbols]

[0055] 10, 10A air conditioner 20, 20A~20F indoor unit 21. Cabinet 21a Back 21b Front 21c page 1 21d 2nd side 22 Indoor heat exchanger 24 Indoor fan 30 Outdoor unit 32 Outdoor heat exchanger 34 Fans 36 Compressor 38 Expansion valve 40 Four-way valve 50 Refrigerant piping 52 Heat transfer tube 52a end 52b End 54 First Bend Pipe 56 Second Bend Pipe 71 Control Unit 72 sensors 80, airflow suppression section 81~84 First member 82a Main body 82b Return part 82c end 83a outer edge 85, 86 Second member 86 Second member 90 Sealing material 91 Water tray

Claims

1. An air conditioner that uses a flammable refrigerant, an outdoor unit having an outdoor heat exchanger, a compressor, and an expansion valve; an indoor unit having a housing arranged with its back surface facing a wall surface inside the room and an indoor heat exchanger that exchanges heat with indoor air; a refrigerant pipe that connects the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger and through which a refrigerant circulates; an airflow suppression unit that is disposed inside the indoor unit on a path of air flowing from the indoor heat exchanger toward a space provided on the rear side and that suppresses airflow toward the space; Equipped with Air conditioner.

2. The refrigerant piping includes a plurality of heat transfer pipes arranged in the housing of the indoor unit and a plurality of first bend pipes connecting one ends of the plurality of heat transfer pipes to each other, the airflow suppression portion is disposed between the plurality of first bend pipes and a first surface of the housing facing the plurality of first bend pipes, and includes a plate-shaped first member extending along an extension direction of the first surface; The air conditioner according to claim 1.

3. The first member has a plate-shaped main body portion and a return portion extending from an end of the main body portion in a direction intersecting the first surface. The air conditioner according to claim 2.

4. the airflow suppression portion has a sealing member disposed on an outer edge of the first member, The sealing member seals between the first member and the housing. The air conditioner according to claim 2.

5. The indoor unit further includes a water tray disposed below the indoor heat exchanger and configured to store drain water condensed in the indoor heat exchanger, The first member is arranged so that at least a portion thereof abuts against the water tray. The air conditioner according to claim 2.

6. When viewed in a direction perpendicular to the first surface, the first member is larger than the indoor heat exchanger. The air conditioner according to claim 2.

7. The refrigerant piping includes a plurality of heat transfer pipes arranged in the housing of the indoor unit and a plurality of second bend pipes connecting other ends of the plurality of heat transfer pipes to each other, The airflow suppression portion includes a second member disposed in a path of air flowing from the second bend pipe toward a lower portion of the rear surface side. The air conditioner according to claim 1.

8. The indoor unit further includes a water tray disposed below the indoor heat exchanger and configured to store drain water condensed in the indoor heat exchanger, the second member is disposed in a gap between the water tray and the plurality of second bend pipes. The air conditioner according to claim 7.

9. A control unit for controlling the outdoor unit and the indoor unit is further provided, The indoor unit further includes an indoor fan that draws indoor air into the housing, and a sensor that detects refrigerant gas inside the housing, The control unit operates the indoor fan when the sensor detects refrigerant gas. The air conditioner according to any one of claims 1 to 8.

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