EP4617577A1

EP4617577A1 - Air conditioner

Info

Publication number: EP4617577A1
Application number: EP25162758.4A
Authority: EP
Inventors: Hideyuki Kobayashi; Seishi Iitaka; Kazushi MOTONAGA
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2024-03-14
Filing date: 2025-03-10
Publication date: 2025-09-17
Also published as: JP2025140712A

Abstract

An air conditioner of the present disclosure uses a flammable refrigerant, and includes: an outdoor unit including an outdoor heat exchanger, a compressor, and an expansion valve; an indoor unit including a housing having a back surface that is disposed to face a wall surface in indoors, and an indoor heat exchanger that performs heat exchange with indoor air; a refrigerant pipe that connects the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger and allows a refrigerant to circulate; and an airflow suppression unit that is disposed in a path of air flowing from the indoor heat exchanger toward a space provided on a back surface side inside the indoor unit and suppresses an airflow to the space.

Description

BACKGROUND

1. Technical Field

The present disclosure relates to an air conditioner.

2. Description of the Related Art

A refrigeration cycle device using a flammable refrigerant has been known. For example, PTL 1 discloses a refrigeration cycle device including a refrigerant circuit that circulates a flammable refrigerant, an indoor unit having a housing that accommodates a load-side heat exchanger of the refrigerant circuit, and a controller that controls the indoor unit.

Citation List

Patent Literature

PTL 1: International Publication No. WO 2017/187618

SUMMARY

The refrigeration cycle device of PTL 1 has a problem in terms of safety.
The present disclosure provides an air conditioner with improved safety.
An air conditioner according to one aspect of the present disclosure uses a flammable refrigerant, and includes:

an outdoor unit including an outdoor heat exchanger, a compressor, and an expansion valve;
an indoor unit including a housing having a back surface that is disposed to face a wall surface of indoors, and an indoor heat exchanger that performs heat exchange with indoor air;
a refrigerant pipe that connects the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger and allows a refrigerant to circulate; and
an airflow suppression unit that is disposed in a path of air flowing from the indoor heat exchanger toward a space provided on a back surface side inside the indoor unit and suppresses an airflow to the space.

The present disclosure can provide an air conditioner with improved safety.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic view of an air conditioner according to a first embodiment of the present disclosure;
Fig. 2 is a perspective view illustrating an appearance of an indoor unit of the air conditioner of Fig. 1;
Fig. 3 is a schematic view illustrating an internal structure of the indoor unit of Fig. 2;
Fig. 4 is a schematic view of the indoor unit of Fig. 2 viewed from a direction of a first surface of a housing;
Fig. 5 is a schematic view illustrating the indoor unit of the air conditioner according to a first modification of the first embodiment;
Fig. 6 is a schematic view illustrating the indoor unit of the air conditioner according to a second modification of the first embodiment;
Fig. 7 is a schematic view illustrating the indoor unit of the air conditioner according to a third modification of the first embodiment;
Fig. 8 is a schematic view illustrating the indoor unit of the air conditioner according to a second embodiment;
Fig. 9 is a schematic view illustrating the indoor unit of the air conditioner according to a first modification of the second embodiment; and
Fig. 10 is a block diagram illustrating an air conditioner according to a third embodiment.

DETAILED DESCRIPTIONS

(Background of present disclosure)

In an air conditioner, for example, a refrigerant such as R410A or R32 is widely used. However, from the viewpoint of prevention of global warming, it is required to use a refrigerant having a smaller global warming potential (GWP).
For example, use of propane or the like has been studied as a refrigerant having a small GWP. Since a refrigerant such as propane is flammable, for example, when the refrigerant leaks in an indoor unit, a combustible concentration region may be formed in indoors, and there is a problem in terms of safety. For this reason, there is a demand for measures to prevent a combustible concentration region from being formed in indoors even if the refrigerant leaks. The combustible concentration region is a region where a mixed gas of a refrigerant and air, which may be combusted, is present.
The inventors of the present invention have studied, in a case where a refrigerant leaks inside an indoor unit, suppressing formation of a combustible concentration region in indoors and improving safety by diffusing the refrigerant into indoors by an indoor fan, and have reached the present invention.
Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings as necessary. However, the following exemplary embodiments are merely examples for describing the present disclosure, and are not intended to limit the present disclosure to the following contents (for example, the shape, dimensions, disposition, and the like of each component). A positional relationship such as up, lower, left, and right is based on a positional relationship illustrated in the drawings unless otherwise specified. Each of the drawings to be described in the following exemplary embodiments is a schematic view, and a ratio of a size and a thickness of each component in each drawing does not necessarily reflect an actual dimensional ratio. In addition, a dimensional ratio of each component is not limited to a ratio illustrated in the drawings.
Note that, in the following description, in a case where it is necessary to distinguish a plurality of components from each other, prefixes such as "first" and "second" are added to the names of the components. However, in a case where the components can be distinguished from each other by reference numerals added to the components, prefixes such as "first" and "second" may be omitted in consideration of sentence readability.

(First exemplary embodiment)

[Overall configuration]

Fig. 1 is a schematic view of air conditioner 10 according to a first embodiment of the present disclosure. Fig. 2 is a perspective view illustrating an appearance of indoor unit 20 of air conditioner 10 of Fig. 1. Fig. 3 is a schematic view illustrating an internal structure of indoor unit 20 of Fig. 2. Fig. 4 is a schematic view of indoor unit 20 of Fig. 2 viewed from a direction of first surface 21c of housing 21. Note that, an X-Y-Z orthogonal coordinate system illustrated in the drawings is for facilitating understanding of the present disclosure, and does not limit the exemplary embodiment of the present disclosure. The X-axis direction indicates the depth direction of indoor unit 20, the Y-axis direction indicates the lateral direction of indoor unit 20, and the Z-axis direction indicates the longitudinal direction of indoor unit 20.
As illustrated in Figs. 1 to 3, air conditioner 10 according to the present exemplary embodiment includes indoor unit 20 that is disposed in indoors Rin to be air-conditioned, outdoor unit 30 that is disposed in outdoors Rout, refrigerant pipe 50, and airflow suppression unit 80.
As illustrated in Fig. 1, outdoor unit 30 includes outdoor heat exchanger 32, compressor 36, and expansion valve 38. Indoor unit 20 includes housing 21 and indoor heat exchanger 22. Indoor unit 20 is disposed such that back surface 21a of housing 21 faces wall surface W1 of indoors Rin. Refrigerant pipe 50 connects outdoor heat exchanger 32, compressor 36, expansion valve 38, and indoor heat exchanger 22. The refrigerant circulates through refrigerant pipe 50. In the present exemplary embodiment, a flammable refrigerant made of propane (R290), isobutane (R600a), ethane (R170), or the like is used as the refrigerant.
As illustrated in Fig. 2, housing 21 of indoor unit 20 includes back surface 21a facing wall surface W1, front surface 21b opposite to back surface 21a, and first surface 21c and second surface 21d connecting back surface 21a and front surface 21b. Furthermore, housing 21 has upper surface 21e and a bottom surface, and is formed in a box shape. In housing 21 of indoor unit 20, as illustrated in Figs. 1 and 3, indoor heat exchanger 22 that performs heat exchange with indoor air A1, and indoor fan 24 that induces indoor air A1 into indoor unit 20 and blows out indoor air A1 subjected to heat exchange with indoor heat exchanger 22 to indoors Rin are provided. As shown in Figs. 2 to 3, airflow suppression unit 80 is disposed inside housing 21 of indoor unit 20. In the present exemplary embodiment, airflow suppression unit 80 is a member that is disposed inside housing 21 and controls the airflow inside the indoor unit. Details of airflow suppression unit 80 will be described later.
Outdoor unit 30 is provided with outdoor heat exchanger 32 that performs heat exchange with outdoor air A2, and fan 34 that induces outdoor air A2 into outdoor unit 30 and blows out outdoor air A2 subjected to heat exchange with outdoor heat exchanger 32 to outdoors Rout. In addition, outdoor unit 30 is provided with compressor 36, expansion valve 38, and four-way valve 40 that execute a refrigeration cycle with indoor heat exchanger 22 and outdoor heat exchanger 32.
Indoor heat exchanger 22, outdoor heat exchanger 32, compressor 36, expansion valve 38, and four-way valve 40 are connected by refrigerant pipe 50 that allows the refrigerant to circulate. In the present embodiment, as illustrated in Fig. 3, refrigerant pipe 50 includes a plurality of heat transfer tubes 52 disposed in housing 21 of the indoor unit, a plurality of first bent tubes 54 connecting first ends 52a of the plurality of heat transfer tubes, and a plurality of second bent tubes 56 connecting second ends 52b of the plurality of heat transfer tubes 52. First bent tube 54 and second bent tube 56 are components connecting the plurality of heat transfer tubes 52. Bent tubes 54, 56 have, for example, U-shaped curved shapes.
In the present exemplary embodiment, when viewed from a direction perpendicular to front surface 21b of housing 21, motor 70 for rotating indoor fan 24 is disposed outside second bent tube 56. Indoor fan 24 can be rotated by motor 70.
As illustrated in Fig. 4, in indoor unit 20, space Sp1 in which indoor heat exchanger 22 and indoor fan 24 are not disposed exists on back surface 21a side of housing 21. When the refrigerant leaks from the connection portion between bent tubes 54, 56 and heat transfer tube 52, the leaking refrigerant may flow from the vicinity of bent tubes 54, 56 toward space Sp1. In particular, since motor 70 is not disposed between indoor heat exchanger 22 or indoor fan 24 and first surface 21c of housing 21, that is, the portion where first bent tube 54 is disposed, and the path of the air is wide, when the refrigerant leaks near first bent tube 54, the leaked refrigerant easily flows into space Sp1. If the refrigerant flows toward space Sp1, the refrigerant concentration in space Sp1 increases, and the refrigerant having a high concentration flows out from housing 21 along wall surface W1 of indoors Rin, so that a combustible concentration region may be formed on wall surface W1. In the present exemplary embodiment, airflow suppression unit 80 is disposed inside housing 21 to prevent the leaking refrigerant from flowing into space Sp1 on back surface 21a side of housing 21.
Airflow suppression unit 80 is disposed in indoor unit 20 and in the path of the air flowing from indoor heat exchanger 22 toward space Sp1 provided on back surface 21a side, and suppresses the airflow to space Sp1. In the present embodiment, airflow suppression unit 80 includes plate-shaped first member 81 that is disposed between first bent tube 54 and first surface 21c of housing 21 and extends along the direction in which first surface 21c extends.
First member 81 is, for example, a plate-shaped member formed of a material such as resin or metal. When viewed from a direction perpendicular to first surface 21c of housing 21, first member 81 may be formed larger than indoor heat exchanger 22. When viewed from a direction perpendicular to first surface 21c, first member 81 is formed larger than indoor heat exchanger 22, so that the inside of housing 21 can be divided into region 26 and region 27 as illustrated in Fig. 3, and the airflow from region 26 to region 27 can be suppressed.
Disposing first member 81 forms an airflow A1 that flows from the portion where first bent tube 54 is disposed, collides with first member 81, and flows toward the center of housing 21. Even when the refrigerant leaks near first bent tube 54 due to the formation of airflow A1, the leaked refrigerant flows toward the center of housing 21 due to airflow A1, so that the refrigerant can be discharged toward indoors Rin by indoor fan 24. At this time, since the refrigerant is mixed with the air flowing through airflow A1, there is an effect of reducing the concentration of the refrigerant. When the refrigerant whose concentration has decreased is discharged into indoors Rin, the refrigerant is diffused into indoors Rin, so that the concentration of the refrigerant in indoors Rin can be further decreased. Disposing first member 81 can also suppress the flow of the refrigerant into space Sp1 provided in back surface 21a of housing 21. Therefore, the refrigerant can be prevented from flowing from back surface 21a toward wall surface W1, and a combustible concentration region can be prevented from being formed on wall surface W1.

[Effects]

The exemplary embodiment described above enables achieving effects below.
Air conditioner 10 is an air conditioner using a flammable refrigerant, and includes an outdoor unit 30, an indoor unit 20, a refrigerant pipe 50, and an airflow suppression unit 80. Outdoor unit 30 includes outdoor heat exchanger 32, compressor 36, and expansion valve 38. Indoor unit 20 includes housing 21 having back surface 21a disposed facing wall surface W1 of indoors Rin, and indoor heat exchanger 22 that exchanges heat with indoor air A1. Refrigerant pipe 50 connects outdoor heat exchanger 32, compressor 36, expansion valve 38, and indoor heat exchanger 22, whereby the refrigerant circulates. Airflow suppression unit 80 is disposed in indoor unit 20 and in the path of the air flowing from indoor heat exchanger 22 toward space Sp1 provided on back surface 21a side, and suppresses the airflow to space Sp1.
With such a configuration, it is possible to suppress formation of a combustible concentration region even when a refrigerant leaks, to provide an air conditioner with improved safety. Disposing airflow suppression unit 80 inside indoor unit 20 can suppress the refrigerant from flowing into space Sp1 on back surface 21a side of housing 21. Therefore, it is possible to prevent the refrigerant from flowing out along wall surface W1 and forming a combustible concentration region on wall surface W1.
Refrigerant pipe 50 includes a plurality of heat transfer tubes 52 disposed in housing 21 of indoor unit 20, and a plurality of first bent tubes 54 connecting first ends 52a of heat transfer tubes 52. Housing 21 has a first surface 21c facing the plurality of first bent tubes 54. Airflow suppression unit 80 includes plate-shaped first member 81 that is disposed between the plurality of first bent tubes 54 and first surface 21c and extends along the direction in which first surface 21c extends.
With such a configuration, it is possible to form airflow A1 which collides with first member 81 from the portion where first bent tube 54 is disposed and flows toward the center of housing 21. By forming airflow A1, even when a refrigerant leak occurs near first bent tube 54, the refrigerant can be prevented from flowing into space Sp1 provided on back surface 21a. Therefore, it is possible to suppress formation of a combustible concentration region on wall surface W1.
In the above-described embodiment, the example in which indoor fan 24 and motor 70 are disposed in indoor unit 20 has been described, but indoor fan 24 and motor 70 are not essential components for air conditioner 10.

[Modifications]

Fig. 5 is a schematic view illustrating indoor unit 20A of the air conditioner according to a first modification of the first embodiment. As illustrated in Fig. 5, first member 82 may have a plate-shaped main body 82a and barbed portion 82b extending from end 82c of main body 82a in a direction intersecting first surface 21c. The direction intersecting first surface 21c may be, for example, a direction perpendicular to first surface 21c. In other words, first member 82 has barbed portion 82b protruding from end 82c of main body 82a toward region 26 of housing 21. Barbed portion 82b may be formed over the outer edge of first member 82. Since first member 82 has barbed portion 82b, it is easy to form an airflow toward the center of housing 21 by colliding with main body 82a of first member 82. Therefore, it is possible to more efficiently suppress the formation of the combustible concentration region on wall surface W1.
Fig. 6 is a schematic view illustrating indoor unit 20B of the air conditioner according to a second modification of the first embodiment. As illustrated in Fig. 6, airflow suppression unit 80 may further include sealing member 90 disposed on outer edge 83a of first member 83. Sealing member 90 seals between first member 83 and housing 21. Sealing member 90 may be formed in a ring shape and disposed over the outer edge of first member 83. Sealing member 90 can be formed of, for example, a material having elasticity such as rubber. Disposing sealing member 90 can suppress more reliably the flow of the airflow from region 26 to region 27 inside housing 21.
Fig. 7 is a schematic view illustrating indoor unit 20C of the air conditioner according to a third modification of the first embodiment. As illustrated in Fig. 7, indoor unit 20C further includes water receiving pan 91 that is disposed below indoor heat exchanger 22 and stores drain water condensed by indoor heat exchanger 22. In addition, first member 84 is disposed to be at least partially in contact with water receiving pan 91. Disposing first member 84 such that at least a part thereof is in contact with water receiving pan 91, can divide the space inside housing 21 into region 28 including the inside of water receiving pan 91 and region 29 including space Sp1 described with reference to Fig. 4. Therefore, the leaking refrigerant can be prevented from flowing into space Sp1.

(Second exemplary embodiment)

With reference to Fig. 8, a second exemplary embodiment will be described. The second exemplary embodiment includes components identical or equivalent to those in the first exemplary embodiment, the components being denoted by the same reference marks as those in the first exemplary embodiment. The second exemplary embodiment does not duplicate the description in the first exemplary embodiment.
Fig. 8 is a schematic view illustrating indoor unit 20D of the air conditioner according to a second embodiment. As shown in Fig. 8, the present exemplary embodiment is different from the first exemplary embodiment in that airflow suppression unit 80 includes second member 85 disposed in a path of air flowing from second bent tube 56 toward the lower portion on back surface 21a side.
Second member 85 is a plate-shaped member, and can be formed of, for example, a material such as resin or metal. Further, in the present embodiment, second member 85 is disposed to extend parallel to the XY plane. A space between second bent tube 56 and motor 70 is connected to space Sp1 on back surface 21a side. Therefore, disposing second member 85 in this gap can suppress the refrigerant leaking near second bent tube 56 from flowing into the space on back surface 21a side.
In particular, when the refrigerant is heavier than air, as shown in Fig. 8, by covering the lower portion of the gap between second bent tube 56 and motor 70 with second member 85, it is possible to more efficiently suppress the refrigerant from flowing into space Sp1. For example, when the leaking refrigerant falls toward second member 85 in accordance with gravity, the refrigerant flows toward the center of housing 21 as indicated by arrow A2 in Fig. 8. The refrigerant flowing toward the center of housing 21 is diffused into indoors Rin by the airflow generated by indoor fan 24.

[Modifications]

Fig. 9 is a schematic view illustrating indoor unit 20E of the air conditioner according to a first modification of the second embodiment. As shown in Fig. 9, second member 86 may be disposed in a gap between water receiving pan 91 and housing 21.
Since the gap between water receiving pan 91 and housing 21 is connected to space Sp1 on back surface 21a side, by disposing second member 86 between water receiving pan 91 and housing 21, it is possible to suppress the refrigerant from flowing to back surface 21a side.

(Third exemplary embodiment)

With reference to Fig. 10, a third exemplary embodiment will be described. The third exemplary embodiment denotes components identical or equivalent to those in the first exemplary embodiment with the same reference marks as those in the first exemplary embodiment. The third exemplary embodiment does not duplicate the description in the first exemplary embodiment.
Fig. 10 is a block diagram illustrating air conditioner 10A according to a third embodiment. As illustrated in Fig. 10, the present embodiment is different from the first embodiment in that air conditioner 10A further includes controller 71, and indoor unit 20F further includes sensor 72.
Controller 71 controls outdoor unit 30 and indoor unit 20 F. Controller 71 includes, for example, a memory that stores a program, and a processing circuit corresponding to a processor such as a central processing unit (CPU). Functions of controller 71 may be configured only by hardware, or may be realized by a combination of the hardware and software. Controller 71 realizes predetermined functions by reading out data and programs stored in the memory to perform various arithmetic processing.
Sensor 72 is capable of detecting refrigerant gas inside housing 21. As sensor 72, for example, a gas sensor capable of detecting the concentration of the refrigerant gas in the air can be used.
Controller 71 operates indoor fan 24 when sensor 72 detects the refrigerant gas inside housing 21. By operating indoor fan 24 when sensor 72 detects the refrigerant gas, the leaking refrigerant can be diffused into indoors Rin. Alternatively, controller 71 may increase the air volume of indoor fan 24 when sensor 72 detects the refrigerant gas. By increasing the air volume of indoor fan 24, the refrigerant gas in housing 21 can be efficiently diffused into indoors Rin.

(Overview of exemplary embodiments)

(1) An air conditioner of the present disclosure uses a flammable refrigerant, and includes: an outdoor unit including an outdoor heat exchanger, a compressor, and an expansion valve; an indoor unit including a housing having a back surface that is disposed to face a wall surface in indoors, and an indoor heat exchanger that performs heat exchange with indoor air; a refrigerant pipe that connects the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger and allows a refrigerant to circulate; and an airflow suppression unit that is disposed in a path of air flowing from the indoor heat exchanger toward a space provided on a back surface side inside the indoor unit and suppresses an airflow to the space.
(2) In the air conditioner according to (1), the refrigerant pipe may include a plurality of heat transfer tubes disposed in the housing of the indoor unit, and a plurality of first bent tubes connecting first ends of the plurality of heat transfer tubes, the housing may have a first surface facing the plurality of first bent tubes, and the airflow suppression unit may include a first member having a plate shape, disposed between the plurality of first bent tubes and the first surface, and extending along an extending direction of the first surface.
(3) In the air conditioner according to (2),the first member may include a main body having a plate shape and a barbed portion extending from an end of the main body in a direction intersecting the first surface.
(4) In the air conditioner according to (2) or (3),the airflow suppression unit may further include a sealing member disposed on an outer edge of the first member, and the sealing member may seal between first member and housing.
(5) In the air conditioner according to any one of (2) to (4),the indoor unit may further include a water receiving pan disposed in a lower portion of the indoor heat exchanger and configured to accumulate drain water condensed by the indoor heat exchanger, and in addition, the first member may be disposed to be at least partially in contact with the water receiving pan.
(6) In the air conditioner according to any one of (2) to (5),the first member may be larger than the indoor heat exchanger when viewed from a direction perpendicular to the first surface.
(7) In the air conditioner according to any one of (1) to (6),the refrigerant pipe may include a plurality of heat transfer tubes disposed in the housing of the indoor unit, and a plurality of second bent tubes connecting second ends of the plurality of heat transfer tubes, and the airflow suppression unit may include a second member disposed in a path of air flowing from the plurality of second bent tubes toward the lower portion on the back surface side.
(8) In the air conditioner according to (7),the indoor unit may further include a water receiving pan disposed in a lower portion of the indoor heat exchanger and configured to accumulate drain water condensed by the indoor heat exchanger, and the second member may be disposed in a gap between the water receiving pan and the plurality of second bent tubes.
(9) The air conditioner according to any one of (1) to (8)may further include a controller that controls the outdoor unit and the indoor unit, in which the indoor unit may further include an indoor fan that attracts indoor air into the housing, and a sensor that detects refrigerant gas inside the housing, and the controller may operate indoor fan when the sensor detects the refrigerant gas.

The present disclosure can be widely applied to an air conditioner using a flammable refrigerant.

Claims

An air conditioner using a flammable refrigerant, comprising:
an outdoor unit including an outdoor heat exchanger, a compressor, and an expansion valve;

an indoor unit including a housing having a back surface that is disposed to face a wall surface of indoors, and an indoor heat exchanger that performs heat exchange with indoor air;

a refrigerant pipe that connects the outdoor heat exchanger, the compressor, the expansion valve, and the indoor heat exchanger and allows a refrigerant to circulate; and

an airflow suppression unit that is disposed in a path of air flowing from the indoor heat exchanger toward a space provided on a back surface side inside the indoor unit and suppresses an airflow to the space.
The air conditioner according to claim 1, wherein the refrigerant pipe includes a plurality of heat transfer tubes disposed in the housing of the indoor unit, and a plurality of first bent tubes connecting first ends of the plurality of heat transfer tubes,
the housing has a first surface facing the plurality of first bent tubes, and

the airflow suppression unit includes a first member having a plate shape, disposed between the plurality of first bent tubes and the first surface, and extending along an extending direction of the first surface.
The air conditioner according to claim 2, wherein the first member includes a main body having a plate shape and a barbed portion extending from an end of the main body in a direction intersecting the first surface.
The air conditioner according to claim 2, wherein the airflow suppression unit further includes a sealing member disposed on an outer edge of the first member, and
the sealing member seals a gap between the first member and the housing.
The air conditioner according to claim 2, wherein the indoor unit further includes a water receiving pan disposed in a lower portion of the indoor heat exchanger and configured to accumulate drain water condensed by the indoor heat exchanger, and
the first member is disposed to be at least partially in contact with the water receiving pan.
The air conditioner according to claim 2, wherein the first member is larger than the indoor heat exchanger when viewed from a direction perpendicular to the first surface.
The air conditioner according to claim 1, wherein the refrigerant pipe includes a plurality of heat transfer tubes disposed in the housing of the indoor unit, and a plurality of second bent tubes connecting second ends of the plurality of heat transfer tubes, and
the airflow suppression unit includes a second member disposed in a path of air flowing from the plurality of second bent tubes toward a lower portion on the back surface side.
The air conditioner according to claim 7, wherein the indoor unit further includes a water receiving pan disposed in a lower portion of the indoor heat exchanger and configured to accumulate drain water condensed by the indoor heat exchanger, and
the second member is disposed in a gap between the water receiving pan and the plurality of second bent tubes.
The air conditioner according to any one of claims 1 to 8, further comprising a controller that controls the outdoor unit and the indoor unit,
wherein the indoor unit further includes an indoor fan that induces indoor air into the housing, and a sensor that detects refrigerant gas inside the housing, and

the controller operates the indoor fan when the sensor detects the refrigerant gas.