Mounting structure, indoor unit, and air conditioner

Abstract

An attachment structure according to the present disclosure is used for removably attaching electronic equipment within a casing of an indoor unit body in an indoor unit of an air conditioner, the attachment structure comprising a first attachment part that is provided to the indoor unit body, a second attachment part that is provided to the electronic equipment and is attached to the first attachment part, and a securing part that secures the second attachment part to the first attachment part, the first attachment part having a guide rail part that extends in a first direction, the second attachment part having a first guided part that is supported by the guide rail part so as to be capable of moving in the first direction during work for attaching or removing the electronic equipment, and a contact part that contacts the first attachment part from a first side in the first direction, and the securing part removably securing the second attachment part to the first attachment part from the first side.

Description

[Technical Field]

[0001] The present disclosure relates to a mounting structure, an indoor unit, and an air conditioner. [Background technology]

[0002] Indoor units of air conditioners in which electronic devices are arranged inside the unit are known. For example, Patent Document 1 describes a ceiling-embedded indoor unit in which a refrigerant sensor as an electronic device is arranged inside the unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-15324 Summary of the Invention [Problem to be solved by the invention]

[0004] In indoor units such as those described above, electronic devices arranged inside the housing of the indoor unit main body may need to be attached or detached to or from the indoor unit main body for replacement, maintenance, etc. However, other components arranged inside the indoor unit main body may get in the way, making it difficult to attach or detach the electronic devices.

[0005] In view of the above circumstances, one of the objects of the present disclosure is to provide an attachment structure that can improve the workability of attaching and detaching electronic devices, an indoor unit equipped with such an attachment structure, and an air conditioner equipped with such an indoor unit. [Means for solving the problem]

[0006] An attachment structure for detachably attaching an electronic device within a housing of an indoor unit body of an air conditioner indoor unit, the attachment structure comprising: a first attachment portion provided on the indoor unit body; a second attachment portion provided on the electronic device and attached to the first attachment portion; and a fixing portion for fixing the second attachment portion to the first attachment portion, the first attachment portion having a guide rail portion extending in a first direction. a first rotation stopper portion; the second mounting portion has a first guided portion that is supported by the guide rail portion so as to be movable in the first direction during attachment / detachment of the electronic device, and a contact portion that contacts the first mounting portion from a first side in the first direction, and the fixing portion fixes the second mounting portion to the first mounting portion so as to be attachable / detachable from the first side. death , The first guided portion has an arm portion that protrudes toward the guide rail portion and a guided main body portion that is provided at the tip of the arm portion and supported by the guide rail portion, and the first rotation stop portion is caught on the arm portion in a direction intersecting the first direction. . One aspect of the mounting structure according to the present disclosure is a mounting structure for detachably mounting an electronic device within the housing of an indoor unit main body of an air conditioner indoor unit, comprising: a first mounting portion provided on the indoor unit main body; a second mounting portion provided on the electronic device and attached to the first mounting portion; and a fixing portion for fixing the second mounting portion to the first mounting portion, wherein the first mounting portion has a guide rail portion extending in a first direction and a second rotation stop portion, and the second mounting portion has a first guided portion supported on the guide rail portion so as to be movable in the first direction during the attachment or detachment of the electronic device, and a contact portion that contacts the first mounting portion from a first side in the first direction, wherein the fixing portion detachably fixes the second mounting portion to the first mounting portion from the first side, and the second rotation stop portion hooks onto the contact portion in a direction intersecting the first direction. One aspect of a mounting structure according to the present disclosure is a mounting structure for detachably mounting an electronic device within a housing of an indoor unit body of an air conditioner indoor unit, the mounting structure comprising: a first mounting portion provided on the indoor unit body; a second mounting portion provided on the electronic device and attached to the first mounting portion; and a fixing portion that fixes the second mounting portion to the first mounting portion, wherein the first mounting portion has a guide rail portion extending in a first direction, and the second mounting portion has a first guided portion that is supported on the guide rail portion so as to be able to move in the first direction during an operation of attaching or detaching the electronic device, and a contact portion that contacts the first mounting portion from a first side in the first direction, and the fixing portion is configured to fix the second mounting portion to or from the first side of the first mounting portion. The guide rail portion has a bottom portion extending in the first direction, and a first guide wall portion and a second guide wall portion protruding from the bottom portion in a second direction intersecting the first direction, the first guide wall portion and the second guide wall portion being arranged opposite each other at a distance in a third direction intersecting both the first direction and the second direction, and being arranged with the first guided portion sandwiched in the third direction, the first guide wall portion having a base portion protruding from the bottom portion in the second direction and an inclined portion connected to the tip end of the base in the second direction, the inclined portion being positioned on the side of the third direction where the second guide wall portion is located relative to the first guide wall portion as it moves away from the base in the second direction.

[0007] One aspect of an indoor unit according to the present disclosure is an indoor unit for an air conditioner, comprising an indoor unit main body, the above-described mounting structure, and an electronic device mounted within the housing of the indoor unit main body by the mounting structure.

[0008] One aspect of an air conditioner according to the present disclosure includes the above-described indoor unit and an outdoor unit. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to improve the workability of attaching and detaching electronic devices in an indoor unit of an air conditioner. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a general configuration of an air conditioner according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing the indoor unit according to the embodiment. [Figure 3] FIG. 2 is an exploded perspective view showing the indoor unit according to the embodiment. [Figure 4] FIG. 2 is a view of a portion of the indoor unit according to the embodiment, seen from below. [Figure 5]FIG. 2 is an exploded perspective view showing a part of the indoor unit according to the embodiment. [Figure 6] FIG. 2 is a perspective view showing a part of the indoor unit body, a refrigerant sensor unit, and an attachment structure in the embodiment. [Figure 7] 1 is a perspective view showing a refrigerant sensor unit and an attachment structure according to an embodiment of the present invention; [Figure 8] FIG. 2 is a left view of the refrigerant sensor unit and mounting structure according to the embodiment. [Figure 9] 1 is an exploded perspective view showing a refrigerant sensor unit and an attachment structure according to an embodiment of the present invention. [Figure 10] 10 is an exploded perspective view showing the refrigerant sensor unit and the mounting structure according to the embodiment, viewed from an angle different from that shown in FIG. 9. [Figure 11] FIG. 2 is a perspective view showing a refrigerant sensor unit according to the embodiment. [Figure 12] 2 is a partial cross-sectional view of a part of the mounting structure according to the embodiment, seen from above. FIG. [Figure 13] FIG. 2 is a perspective view showing a part of the mounting structure according to the embodiment. [Figure 14] FIG. 10 is a perspective view showing another part of the mounting structure according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present disclosure. In addition, in the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure in order to make each configuration easier to understand.

[0012] The drawings also show the X-axis, Y-axis, and Z-axis as appropriate. The X-axis indicates one of the horizontal directions. The Y-axis indicates the other of the horizontal directions. The Z-axis indicates the vertical direction. In the following description, the horizontal direction along the X-axis is referred to as the "front-rear direction X," the horizontal direction along the Y-axis is referred to as the "left-right direction Y," and the vertical direction along the Z-axis is referred to as the "vertical direction Z." The front-rear direction X, left-right direction Y, and vertical direction Z are perpendicular to each other. In the following description, the side of the vertical direction Z toward which the arrow of the Z-axis points (+Z side) is referred to as the upper side, and the side of the vertical direction Z opposite to the side toward which the arrow of the Z-axis points (-Z side) is referred to as the lower side. Furthermore, the side of the front-rear direction X toward which the arrow of the X-axis points (+X side) is referred to as the front side, and the side of the front-rear direction X opposite to the side toward which the arrow of the X-axis points (-X side) is referred to as the rear side. In addition, the side (+Y side) of the left-right direction Y toward which the arrow on the Y axis points is defined as the right side, and the side (-Y side) opposite to the side toward which the arrow on the Y axis points is defined as the left side. In the following embodiments, the vertical direction Z corresponds to the "first direction," the lower side corresponds to the "first side" of the first direction, and the upper side corresponds to the "second side" of the first direction.

[0013] FIG. 1 is a schematic diagram showing the general configuration of an air conditioner 100 according to the present embodiment. The air conditioner 100 is a device that uses a refrigeration cycle in which a refrigerant 19 circulates. As shown in FIG. 1, the air conditioner 100 comprises an outdoor unit 10, an indoor unit 20, and a circulation path section 18. The outdoor unit 10 is located outdoors. The indoor unit 20 is located indoors. The outdoor unit 10 and the indoor unit 20 are connected to each other by the circulation path section 18 in which the refrigerant 19 circulates. The outdoor unit 10 and the indoor unit 20 are heat exchange units that exchange heat with the air.

[0014] The air conditioner 100 can adjust the temperature of the indoor air by exchanging heat between the refrigerant 19 flowing through the circulation path section 18 and the air in the room where the indoor unit 20 is located. Examples of the refrigerant 19 include fluorine-based refrigerants or hydrocarbon-based refrigerants with low global warming potential (GWP). Examples of the refrigerant 19 include a single refrigerant such as R1234yf, R1234ze, R32, or R290, a mixed refrigerant of two or more of these, or a mixed refrigerant of any of these with another refrigerant. Examples of the refrigerant 19 include a mixed refrigerant containing R1132(E) or a mixed refrigerant containing R1123. Examples of refrigerant 19 include mixed refrigerants of R516A, R445A, R444A, R454C, R444B, R454A, R455A, R457A, R459B, R452B, R454B, R447B, R447A, R446A, and R459A. When gaseous, refrigerant 19 has a density greater than that of air.

[0015] The outdoor unit 10 includes a housing 11, a compressor 12, a heat exchanger 13, a flow rate adjustment valve 14, a blower 15, a four-way valve 16, and a control unit 17. The housing 11 houses the compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, the blower 15, the four-way valve 16, and the control unit 17.

[0016] The compressor 12, the heat exchanger 13, the flow rate control valve 14, and the four-way valve 16 are provided in a portion of the circulation path 18 that is located inside the housing 11. The compressor 12, the heat exchanger 13, the flow rate control valve 14, and the four-way valve 16 are connected by a portion of the circulation path 18 that is located inside the housing 11.

[0017] The four-way valve 16 is provided in a portion of the circulation path section 18 that is connected to the discharge side of the compressor 12. The four-way valve 16 can reverse the direction of the refrigerant 19 flowing through the circulation path section 18 by switching a portion of the path of the circulation path section 18. When the path connected by the four-way valve 16 is the path shown by the solid line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the solid arrow in Fig. 1. On the other hand, when the path connected by the four-way valve 16 is the path shown by the dashed line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the dashed arrow in Fig. 1.

[0018] The indoor unit 20 includes a housing 21, a heat exchanger 22, and a blower 23. The housing 21 houses the heat exchanger 22 and the blower 23. The indoor unit 20 is capable of cooling operation to cool the air in the room where the indoor unit 20 is located, and heating operation to warm the air in the room where the indoor unit 20 is located.

[0019] When the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the solid arrow in Fig. 1. In other words, when the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow control valve 14, and the heat exchanger 22 of the indoor unit 20 in that order, before returning to the compressor 12. During cooling operation, the heat exchanger 13 in the outdoor unit 10 functions as a condenser, and the heat exchanger 22 in the indoor unit 20 functions as an evaporator.

[0020] On the other hand, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the dashed line in Fig. 1. In other words, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow control valve 14, and the heat exchanger 13 of the outdoor unit 10 in that order, before returning to the compressor 12. In heating operation, the heat exchanger 13 in the outdoor unit 10 functions as an evaporator, and the heat exchanger 22 in the indoor unit 20 functions as a condenser.

[0021] Next, the indoor unit 20 will be described in further detail. Fig. 2 is a perspective view showing the indoor unit 20 in this embodiment. Fig. 3 is an exploded perspective view showing the indoor unit 20 in this embodiment. Fig. 4 is a view of part of the indoor unit 20 in this embodiment seen from below. Fig. 5 is an exploded perspective view showing part of the indoor unit 20.

[0022] As shown in Figures 2 to 5, the indoor unit 20 of this embodiment is a ceiling-embedded indoor unit. That is, the indoor unit 20 of this embodiment is installed by being embedded in the ceiling. As shown in Figures 2 and 3, the indoor unit 20 includes an indoor unit main body 29 and a decorative panel 30. The indoor unit main body 29 is fixed to the ceiling. As shown in Figure 3, the indoor unit main body 29 includes a housing 21, a heat exchanger 22, a blower 23, an electric unit 24, and a drain pan 25.

[0023] The housing 21 is in the shape of a substantially rectangular parallelepiped box that opens downward. When viewed in the vertical direction Z, the housing 21 has a substantially square shape with a pair of sides extending in the front-to-rear direction X and a pair of sides extending in the left-to-right direction Y, and the corners are chamfered. The electric component unit 24 is attached to the outer surface of the housing 21. In the example of FIG. 3 , the electric component unit 24 is attached to the surface of the outer surface of the housing 21 that is located on the rear side (-X side). The electric component unit 24 has a control unit that controls the indoor unit 20.

[0024] The blower 23 has an impeller 23a that can rotate around a rotation axis R that extends in the vertical direction Z. By rotating around the rotation axis R, the impeller 23a draws in air from below and blows the drawn-in air outward in a radial direction centered on the rotation axis R. In the following description, the radial direction centered on the rotation axis R may be simply referred to as the "radial direction."

[0025] The heat exchanger 22 is disposed surrounding the impeller 23a. As shown in FIG. 4, the heat exchanger 22 extends in a substantially C-shape from one end 22a to the other end 22b when viewed in the vertical direction Z. The one end 22a and the other end 22b of the heat exchanger 22 are located within a pipe accommodating section 21f within the housing 21. The pipe accommodating section 21f is formed in a corner on the rear side (-X side) and the right side (+Y side) within the housing 21. The interior of the pipe accommodating section 21f is separated by a partition wall 21e from a space in which the heat exchanger 22 and the blower 23 are disposed. A refrigerant pipe group 18a consisting of a plurality of refrigerant pipes 18b is disposed within the pipe accommodating section 21f. The refrigerant pipe group 18a forms part of the circulation path section 18. The one end 22a and the other end 22b of the heat exchanger 22 are connected to the refrigerant pipes 18b included in the refrigerant pipe group 18a. One end 22a is located at the front end (+X side) of pipe housing 21f. The other end 22b is located at the left end (-Y side) of pipe housing 21f. Drain pan 25 is located below heat exchanger 22. Drain pan 25 is fitted into an opening on the lower side of housing 21.

[0026] The decorative panel 30 is located below the indoor unit main body 29. The decorative panel 30 is attached to the indoor unit main body 29. As shown in FIG. 2, the decorative panel 30 has a frame-shaped decorative panel main body 31 and a grill 32. The decorative panel main body 31 is formed with an air inlet 20a and an air outlet 20b. The air inlet 20a and the air outlet 20b penetrate the decorative panel main body 31 in the vertical direction Z. The air inlet 20a is formed by an inner portion of the frame-shaped decorative panel main body 31. The air outlet 20b is located radially outward of the air inlet 20a. In this embodiment, multiple air outlets 20b are formed. More specifically, four air outlets 20b are formed. A grill 32 covering the air inlet 20a is attached to the decorative panel main body 31. The grill 32 has multiple ventilation holes arranged in a lattice pattern.

[0027] When blower 23 is driven and impeller 23a rotates around rotation axis R, indoor air is drawn into air inlet 20a through multiple ventilation holes formed in grille 32. The air drawn into air inlet 20a is then drawn into blower 23 and blown outward in the radial direction from blower 23. The air blown out from blower 23 passes through heat exchanger 22 and is blown into the room from each air outlet 20b.

[0028] 5, in this embodiment, indoor unit 20 includes refrigerant sensor unit (electronic device) 40 and a mounting structure 80 for detachably mounting refrigerant sensor unit 40 inside housing 21 of indoor unit main body 29. In this embodiment, refrigerant sensor unit 40 is mounted by mounting structure 80 to sheet metal member 21a that forms part of housing 21.

[0029] The sheet metal member 21a is a member that forms part of the outer peripheral wall of the housing 21. In this embodiment, the sheet metal member 21a forms a rear (-X side) and right (+Y side) corner of the outer peripheral wall of the housing 21. The sheet metal member 21a has a first wall portion 21b and a second wall portion 21c. The first wall portion 21b is plate-shaped with a plate surface facing the front-rear direction X. The second wall portion 21c is connected to the right edge of the first wall portion 21b. The second wall portion 21c is plate-shaped with a plate surface facing in a direction inclined in the left-right direction Y with respect to the front-rear direction X. The second wall portion 21c has an inner wall surface 21d that forms part of the inner peripheral surface of the housing 21 and faces the front (+X side) and left (-Y side). In this embodiment, the refrigerant sensor unit 40 is attached to the inner wall surface 21d by the mounting structure 80.

[0030] As shown in Fig. 4, the refrigerant sensor unit 40 is housed in the rear (-X side) and right (+Y side) corner of the interior of the housing 21, i.e., in the pipe housing portion 21f. In this embodiment, the refrigerant sensor unit 40 is located to the right (+Y side) of the refrigerant pipe group 18a. The refrigerant sensor unit 40 is located radially outward of the heat exchanger 22. The refrigerant sensor unit 40 is located rearward and to the right of one end 22a of the heat exchanger 22. The refrigerant sensor unit 40 is located to the right of the other end 22b of the heat exchanger 22.

[0031] FIG. 6 is a perspective view showing a portion of the indoor unit body 29, the refrigerant sensor unit 40, and the mounting structure 80. FIG. 7 is a perspective view showing the refrigerant sensor unit 40 and the mounting structure 80. FIG. 8 is a view of the refrigerant sensor unit 40 and the mounting structure 80 as viewed from the left (-Y direction). FIG. 9 is an exploded perspective view showing the refrigerant sensor unit 40 and the mounting structure 80. FIG. 10 is an exploded perspective view showing the refrigerant sensor unit 40 and the mounting structure 80, and is a view of the refrigerant sensor unit 40 and the mounting structure 80 as viewed from an angle different from that shown in FIG. 9. FIG. 11 is a perspective view showing the refrigerant sensor unit 40. FIG. 12 is a partial cross-sectional view of a portion of the mounting structure 80 as viewed from above. FIG. 13 is a perspective view showing a portion of the mounting structure 80. FIG. 14 is a perspective view showing another portion of the mounting structure 80.

[0032] The refrigerant sensor unit 40 shown in Figures 6 to 11 is a device capable of detecting refrigerant 19 that has leaked into the housing 21 of the indoor unit main body 29. As shown in Figure 6, the refrigerant sensor unit 40 has a main body portion 44 and a second mounting portion 60. The second mounting portion 60 is a portion of the mounting structure 80 that is provided on the refrigerant sensor unit 40. In this embodiment, the second mounting portion 60 is integrally molded with the case 41 of the refrigerant sensor unit 40. The second mounting portion 60 will be described in detail later in the description of the mounting structure 80. In this embodiment, the refrigerant sensor unit 40 corresponds to an "electronic device."

[0033] The main body 44 of the refrigerant sensor unit 40 has a case 41, a refrigerant sensor 42, and a substrate 43. The case 41 houses the refrigerant sensor 42 and the substrate 43. In this embodiment, the case 41 has a generally rectangular box shape that is long in the vertical direction Z. As shown in FIGS. 7 and 8, the case 41 has a first case member 41a and a second case member 41b located on the rear side (-X side) of the first case member 41a. The first case member 41a and the second case member 41b are fixed to each other in the front-rear direction X. In this embodiment, the first case member 41a and the second case member 41b are made of resin.

[0034] 11, the second case member 41b has a rear wall portion 41c and a protruding case portion 41d that protrudes rearward (toward the -X side) from the rear wall portion 41c. An opening 45 that opens into the housing 21 of the indoor unit 20 is formed in the rear wall portion 41c. In this embodiment, the opening 45 opens rearward (toward the -X side).

[0035] Refrigerant sensor 42 shown in FIG. 6 is a sensor capable of detecting refrigerant 19. In this embodiment, refrigerant sensor 42 is a semiconductor-type refrigerant sensor. Refrigerant sensor 42 is attached to substrate 43. Refrigerant 19 that has leaked into housing 21 flows into case 41 through opening 45 and comes into contact with refrigerant sensor 42, causing refrigerant sensor 42 to detect the refrigerant 19. This allows refrigerant sensor unit 40 to detect that refrigerant 19 has leaked inside housing 21. A detection signal from refrigerant sensor 42 is sent to the control unit of electrical unit 24 via wiring (not shown).

[0036] Refrigerant 19 is relatively likely to leak from, for example, refrigerant pipe group 18a or the connection between refrigerant pipe group 18a and heat exchanger 22. Therefore, refrigerant 19 is particularly likely to leak from pipe accommodating portion 21f within housing 21. In this embodiment, refrigerant sensor unit 40 is disposed within pipe accommodating portion 21f, making it easy to quickly and effectively detect leaked refrigerant 19 by refrigerant sensor unit 40. Note that refrigerant 19 that leaks within housing 21 is in a gaseous state.

[0037] 9 and 10, the mounting structure 80 includes a first mounting portion 50 provided on the indoor unit main body 29, a second mounting portion 60 provided on the refrigerant sensor unit 40, and a fixing portion 70. In describing the mounting structure 80, the relative positional relationships of the various portions will be explained using the protrusion direction P and the width direction W.

[0038] The protrusion direction P is a direction indicated by the P axis in the drawings as appropriate. In this embodiment, the protrusion direction P corresponds to a "second direction" that intersects with the vertical direction Z, which is the first direction. In this embodiment, the protrusion direction P is a direction that is perpendicular to the vertical direction Z and is inclined with respect to both the front-rear direction X and the left-right direction Y. More specifically, the protrusion direction P is a direction that is inclined at 45 degrees with respect to both the front-rear direction X and the left-right direction Y. In the following description, the side of the protrusion direction P toward which the arrow of the P axis points (+P side) is referred to as "one protrusion direction side," and the side of the protrusion direction P opposite to the side toward which the arrow of the P axis points (-P side) is referred to as "the other protrusion direction side." The one protrusion direction side is a side that faces the front (+X side) and the left (-Y side), and the other protrusion direction side is a side that faces the rear (-X side) and the right (+Y side).

[0039] The width direction W is the direction indicated by the W axis in the drawings as appropriate. In this embodiment, the width direction W corresponds to a "third direction" that intersects both the vertical direction Z, which is the first direction, and the protrusion direction P, which is the second direction. In this embodiment, the width direction W is a direction perpendicular to both the vertical direction Z and the protrusion direction P. In the following description, the side of the width direction W toward which the arrow of the W axis points (+W side) is referred to as "one width direction side," and the side of the width direction W opposite to the side toward which the arrow of the W axis points (-W side) is referred to as "the other width direction side." The one width direction side is the side facing the rear (-X side) and left side (-Y side), and the other width direction side is the side facing the front (+X side) and right side (+Y side).

[0040] In this embodiment, the first mounting portion 50 is a sheet metal member. As shown in Fig. 6, the first mounting portion 50 is fixed to the sheet metal member 21a of the housing 21 by a screw member such as a bolt or by welding. In this embodiment, the first mounting portion 50 is fixed to the inner wall surface 21d of the second wall portion 21c of the sheet metal member 21a. Note that the first mounting portion 50 may be fixed to the inner wall surface 21d by both a screw member and welding.

[0041] 9 and 10, the first mounting portion 50 has a guide rail portion 51 and a pair of leg portions 52, 53. The guide rail portion 51 extends in the vertical direction Z. The guide rail portion 51 has a bottom portion 51a extending in the vertical direction Z, and a first guide wall portion 54 and a second guide wall portion 55 protruding from the bottom portion 51a in the protruding direction P. In this embodiment, the bottom portion 51a is plate-shaped with its plate surface facing the protruding direction P. More specifically, the bottom portion 51a is a generally rectangular plate-shaped portion that is long in the vertical direction Z.

[0042] The first guide wall 54 and the second guide wall 55 each protrude from both edges of the bottom 51a in the width direction W toward one side in the protrusion direction (+P side). The first guide wall 54 protrudes from an edge of the bottom 51a on one side in the width direction (+W side) toward one side in the protrusion direction. The second guide wall 55 protrudes from an edge of the bottom 51a on the other side in the width direction (-W side) toward one side in the protrusion direction. The first guide wall 54 and the second guide wall 55 extend in the vertical direction Z. The first guide wall 54 and the second guide wall 55 are disposed opposite each other with a gap in between in the width direction W. In this embodiment, the first guide wall 54 and the second guide wall 55 are plate-shaped with their plate surfaces facing the width direction W.

[0043] In this embodiment, the first guide wall portion 54 has a base portion 54a that protrudes from the bottom portion 51a in the protruding direction P, and an inclined portion 54b that connects to the tip end of the base portion 54a in the protruding direction P, i.e., the end on one side (+P side) in the protruding direction. The base portion 54a and the inclined portion 54b extend in the vertical direction Z. In this embodiment, the dimension of the base portion 54a in the vertical direction Z and the dimension of the inclined portion 54b in the vertical direction Z are the same. The base portion 54a is plate-shaped with a plate surface perpendicular to the width direction W. The base portion 54a is in the shape of a substantially rectangular plate that is long in the vertical direction Z.

[0044] The inclined portion 54b is bent toward the other widthwise side (-W side) relative to the base 54a. The inclined portion 54b protrudes toward the other widthwise side as it moves from the end of the base 54a on one protruding side (+P side) in the protruding direction toward the one protruding side. In other words, the inclined portion 54b is positioned toward the side in the widthwise direction W where the second guide wall portion 55 is positioned relative to the first guide wall portion 54, i.e., the other widthwise side, as it moves away from the base 54a in the protruding direction P. As shown in FIG. 12 , in this embodiment, the inclined portion 54b protrudes toward the front side (+X side) from the end of the base 54a on one protruding side. The inclined portion 54b is plate-shaped with a plate surface perpendicular to the left-right direction Y. The inclined portion 54b is a substantially rectangular plate-shaped member that is elongated in the vertical direction Z. The inclined portions 54b are disposed facing each other at an interval on one protruding side (+P side) of the bottom 51a.

[0045] In the present embodiment, the protruding height of the base 54a relative to the bottom 51a, i.e., the dimension in the protruding direction P, and the protruding height of the inclined portion 54b relative to the base 54a, i.e., the dimension in the front-rear direction X, are substantially the same. Note that the dimension of the base 54a in the protruding direction P and the dimension of the inclined portion 54b in the front-rear direction X may be different from each other.

[0046] In this embodiment, the plate surface of the second guide wall portion 55 is perpendicular to the width direction W. The second guide wall portion 55 has a generally rectangular plate shape that is long in the vertical direction Z. The dimension of the second guide wall portion 55 in the protruding direction P is smaller than the dimension of the first guide wall portion 54 in the protruding direction P. The end portion of the second guide wall portion 55 on one side in the protruding direction (+P side) is located closer to the other side in the protruding direction (-P side) than the end portion of the first guide wall portion 54 on one side in the protruding direction. The end portion of the first guide wall portion 54 on one side in the protruding direction is the end portion of the inclined portion 54b on one side in the protruding direction. In this embodiment, the dimension of the second guide wall portion 55 in the protruding direction P is smaller than the dimension of the base portion 54a in the protruding direction P. The end portion of the second guide wall portion 55 on one side in the protruding direction is located closer to the other side in the protruding direction than the end portion of the base portion 54a on one side in the protruding direction.

[0047] As shown in Fig. 8, in this embodiment, the lower end of the second guide wall portion 55 is located higher than the lower end of the first guide wall portion 54. In other words, the first guide wall portion 54 protrudes downward more than the second guide wall portion 55. As shown in Fig. 10, the upper end of the second guide wall portion 55 is located at the same position in the vertical direction Z as the upper end of the first guide wall portion 54. The dimension of the second guide wall portion 55 in the vertical direction Z is smaller than the dimension of the first guide wall portion 54 in the vertical direction Z.

[0048] In the following description, the inside of the guide rail portion 51 surrounded by the bottom portion 51a, the first guide wall portion 54, and the second guide wall portion 55 may be simply referred to as the "inside of the guide rail portion 51."

[0049] The pair of legs 52, 53 protrude from both ends of the guide rail portion 51 in the vertical direction Z toward the other side in the protruding direction (-P side). The leg 52 protrudes from a lower end of the bottom portion 51a toward the other side in the protruding direction. The leg 53 protrudes from an upper end of the bottom portion 51a toward the other side in the protruding direction. The leg 52 has a first protruding wall portion 52a protruding from the lower end of the bottom portion 51a toward the other side in the protruding direction, and a second protruding wall portion 52b protruding downward from the end of the first protruding wall portion 52a on the other side in the protruding direction. The leg 53 has a first protruding wall portion 53a protruding from an upper end of the bottom portion 51a toward the other side in the protruding direction, and a second protruding wall portion 53b protruding upward from the end of the first protruding wall portion 53a on the other side in the protruding direction. The first protruding wall portion 52a and the first protruding wall portion 53a are arranged opposite each other with a gap in between in the vertical direction Z. The first protruding wall portion 52a is located below the first protruding wall portion 53a. The first protruding wall portions 52a, 53a are each shaped like a substantially rectangular plate with its plate surface facing the vertical direction Z.

[0050] The first protruding wall portion 52a has a screw hole 57 formed therethrough in the vertical direction Z. In this embodiment, the screw hole 57 is formed on one side (+P side) of the protruding direction of the first protruding wall portion 52a. A burring portion 57a ​​protruding upward is formed on the periphery of the screw hole 57 on the upper surface of the first protruding wall portion 52a.

[0051] The second protruding wall portions 52b, 53b are portions that are fixed to the housing 21. Fixing the second protruding wall portions 52b, 53b to the housing 21 fixes the first mounting portion 50 to the housing 21. In the present embodiment, the second protruding wall portions 52b, 53b are fixed to the second wall portion 21c of the sheet metal member 21a. The second protruding wall portions 52b, 53b are fixed to the housing 21 by means of screw members such as bolts or by welding. In the present embodiment, the second protruding wall portions 52b, 53b have a substantially rectangular plate shape with a plate surface facing the protruding direction P. As shown in FIG. 6, the surface of the second protruding wall portions 52b, 53b on the other side in the protruding direction (-P side) contacts the inner wall surface 21d of the second wall portion 21c.

[0052] The second protruding wall portion 52b has a through-hole 52c formed therein, which penetrates the second protruding wall portion 52b in the protruding direction P. The through-hole 52c is formed in an upper portion of the second protruding wall portion 52b. When the second protruding wall portion 52b is fixed to the housing 21 with a screw member such as a bolt, the screw member is passed through the through-hole 52c from one side in the protruding direction (+P side) and tightened into a screw hole formed in the second wall portion 21c. The lower portion of the second protruding wall portion 52b is a weld portion 52d. When the second protruding wall portion 52b is fixed to the housing 21 by welding, the weld portion 52d is fixed to the second wall portion 21c by welding.

[0053] As shown in FIG. 10, the second protruding wall portion 53b has a through-hole 53c formed therein, which penetrates the second protruding wall portion 53b in the protruding direction P. The through-hole 53c is formed in a lower portion of the second protruding wall portion 53b. When the second protruding wall portion 53b is fixed to the housing 21 with a screw member such as a bolt, the screw member is passed through the through-hole 53c from one side in the protruding direction (+P side) and tightened into a screw hole formed in the second wall portion 21c. The upper portion of the second protruding wall portion 53b is a weld portion 53d. When the second protruding wall portion 53b is fixed to the housing 21 by welding, the weld portion 53d is fixed to the second wall portion 21c by welding.

[0054] The first mounting portion 50 has a first rotation stopper 56. In this embodiment, the first rotation stopper 56 is formed at the upper end of the second guide wall portion 55. The first rotation stopper 56 protrudes from the upper end of the second guide wall portion 55 to one side in the protruding direction (the +P side). The end of the first rotation stopper 56 on one side in the protruding direction is located on one side in the protruding direction relative to the end of the first guide wall portion 54 on one side in the protruding direction. In this embodiment, the first rotation stopper 56 is plate-shaped with its plate surface facing in the width direction W.

[0055] The first rotation stopper 56 has a root portion 56a that protrudes from the upper end of the second guide wall portion 55 toward one side in the protruding direction (+P side), and a hook portion 56b that protrudes downward from the end of the root portion 56a on one side in the protruding direction. The lower end of the hook portion 56b is located higher than the lower end of the second guide wall portion 55. In this embodiment, the lower edge of the hook portion 56b has an arc shape that convex downward when viewed in the width direction W. The hook portion 56b is disposed opposite the second guide wall portion 55 with a gap in the protruding direction P. As shown in FIG. 13 , the hook portion 56b is inserted from above into a recess 67e (described later) and hooked onto the inner surface of the recess 67e.

[0056] As shown in FIG. 9 , the first mounting portion 50 has a second rotation stopper 58. In this embodiment, the second rotation stopper 58 is formed on the first protruding wall 52a of the leg 52. The second rotation stopper 58 has a pair of sandwiching walls 58a and 58b. The pair of sandwiching walls 58a and 58b protrude downward from both edges of the first protruding wall 52a in the width direction W. The sandwiching wall 58a protrudes downward from a portion of an edge on one side in the width direction (+W side) of the first protruding wall 52a in the protruding direction (+P side). The sandwiching wall 58b protrudes downward from a portion of an edge on the other side in the width direction (-W side) of the first protruding wall 52a in the protruding direction (-W side). The sandwiching wall 58a and the sandwiching wall 58b are disposed opposite each other with a gap in the width direction W. The sandwiching wall portions 58a and 58b are arranged to sandwich the screw hole 57 in the width direction W when viewed in the vertical direction Z. In the present embodiment, the sandwiching wall portions 58a and 58b are plate-shaped with their plate surfaces facing the width direction W. When viewed in the width direction W, the sandwiching wall portions 58a and 58b are each substantially semicircular in shape and convex downward.

[0057] The second mounting portion 60 is a portion that is attached to the first mounting portion 50. In this embodiment, the second mounting portion 60 is integrally molded with the case 41 of the refrigerant sensor unit 40. More specifically, the second mounting portion 60 is integrally molded with the second case member 41b of the case 41. In this embodiment, the second mounting portion 60 is made of resin. The second mounting portion 60 has a first guided portion 61, a second guided portion 62, and a fixed portion 63.

[0058] The first guided portion 61 protrudes rearward (-X side) from the upper end of the rear wall portion 41c of the second case member 41b. As shown in Fig. 10, the first guided portion 61 has an arm portion 67 protruding rearward from the upper end of the rear wall portion 41c, and a guided main body portion 64 provided at the tip end of the arm portion 67, i.e., the rear end portion of the arm portion 67.

[0059] The arm portion 67 protrudes toward the guide rail portion 51. The arm portion 67 has a bottom wall portion 67a extending rearward (negative X-axis direction) from the upper end of the rear wall portion 41c, and a pair of side wall portions 67b, 67c protruding upward from both edges of the bottom wall portion 67a in the left-right direction Y. The front end (positive X-axis direction) of the bottom wall portion 67a is connected to a portion of the upper edge of the rear wall portion 41c closer to the right side (nearer to the +Y axis direction). In this embodiment, the bottom wall portion 67a is plate-shaped with its plate surface facing the vertical direction Z. The right edge of the bottom wall portion 67a curves and extends toward the left side (negative Y axis direction) as it extends rearward from the rear wall portion 41c. The side wall portion 67b protrudes upward from the right edge of the bottom wall portion 67a. The side wall portion 67c protrudes upward from the left edge of the bottom wall portion 67a. The pair of side wall portions 67b, 67c face each other with a gap in the left-right direction Y. The side wall portion 67b curves and extends leftward as it approaches the rear side (-X side). As shown in FIG. 13, in this embodiment, the rear end of the side wall portion 67b is an engaged portion 67d on which the first rotation preventing portion 56 is hooked.

[0060] A recess 67e is formed in the arm portion 67, recessed downward. The recess 67e is formed by a bottom wall portion 67a and a pair of side wall portions 67b, 67c. The upper surface of the bottom wall portion 67a forms the lower surface of the inner surface of the recess 67e. The left surface of the side wall portion 67b and the right surface of the side wall portion 67c form the surface of the inner surface of the recess 67e in the left-right direction Y. In this embodiment, the recess 67e is a groove extending in the front-rear direction X.

[0061] The hook portion 56b of the first rotation prevention portion 56 is inserted into the recess 67e from above. The hook portion 56b is hooked onto the engaged portion 67d from one side in the protruding direction (+P side). This causes the first rotation prevention portion 56 to be hooked onto the arm portion 67 in a direction intersecting with the vertical direction Z. The hook portion 56b inserted into the recess 67e sandwiches the engaged portion 67d between itself and the second guide wall portion 55 in the protruding direction P. The base portion 56a of the first rotation prevention portion 56 is disposed above the engaged portion 67d, facing it with a gap in between.

[0062] In the present disclosure, "a certain object getting caught on another object in a certain direction" means that when the certain object and the other object attempt to move relatively in a certain direction, the certain object and the other object come into contact with each other, restricting the relative movement, and when the relative movement is not possible, the certain object and the other object may be in contact with each other or may be positioned opposite each other with a gap between them. For example, "first rotation stopper 56 getting caught on arm 67 in a direction intersecting vertical direction Z" means that when the first rotation stopper 56 and the arm 67 attempt to move relatively in a direction intersecting vertical direction Z, the first rotation stopper 56 and the arm 67 come into contact with each other, restricting the relative movement between them. When the first mounting portion 50 and the second mounting portion 60 are fixed to each other and the first rotation prevention portion 56 and the arm portion 67 cannot move relative to each other, the first rotation prevention portion 56 and the arm portion 67 may be in contact with each other or may face each other with a small gap between them.

[0063] The guided main body portion 64 is a portion supported by the guide rail portion 51. The guided main body portion 64 is fitted into the inner surface of the guide rail portion 51, which is surrounded by the bottom portion 51a, the first guide wall portion 54, and the second guide wall portion 55. With the guided main body portion 64 fitted into the inner surface of the guide rail portion 51 in this manner, the first guided portion 61 is supported by the guide rail portion 51 so as to be movable in the vertical direction Z during the installation and removal of the refrigerant sensor unit 40. The guided main body portion 64 is located between the first guide wall portion 54 and the second guide wall portion 55 in the width direction W. As a result, the first guide wall portion 54 and the second guide wall portion 55 are disposed so as to sandwich the first guided portion 61 in the width direction W.

[0064] The guided main body portion 64 protrudes upward beyond the rear end of the arm portion 67. The guided main body portion 64 protrudes beyond the rear end of the arm portion 67 toward the other protruding side (-P side). In this embodiment, the guided main body portion 64 is box-shaped and opens to the front side (+X side). The interior of the guided main body portion 64 is connected to the interior of the recess 67e.

[0065] 12, in this embodiment, the guided main body portion 64 has a substantially pentagonal shape when viewed in the vertical direction Z. The guided main body portion 64 has an upper surface 64a, a first opposing surface 64b, a second opposing surface 64c, a third opposing surface 64d, and a fourth opposing surface 64e. The upper surface 64a, the first opposing surface 64b, the second opposing surface 64c, the third opposing surface 64d, and the fourth opposing surface 64e are outer surfaces of the guided main body portion 64. The guided main body portion 64 is supported by the guide rail portion 51 with the first opposing surface 64b, the second opposing surface 64c, the third opposing surface 64d, and the fourth opposing surface 64e facing and supported against the inner surfaces of the guide rail portion 51.

[0066] The upper surface 64a is the surface facing upward among the outer surfaces of the guided main body portion 64. The upper surface 64a has a substantially pentagonal shape when viewed in the vertical direction Z. The upper surface 64a has a flat surface 64f perpendicular to the vertical direction Z, a first inclined surface 64g connected to an edge of the flat surface 64f on one widthwise side (+W side), and a second inclined surface 64h connected to an edge of the flat surface 64f on the other widthwise side (-W side). As shown in FIG. 13 , the first inclined surface 64g is inclined downward toward one widthwise side. The first inclined surface 64g is inclined upward and obliquely toward one widthwise side. The second inclined surface 64h is inclined downward toward the other widthwise side. The second inclined surface 64h is inclined upward and obliquely toward the other widthwise side.

[0067] The first opposing surface 64b is a surface of the outer surface of the guided main body portion 64 facing the other side in the protruding direction (-P side). In this embodiment, the first opposing surface 64b is a flat surface perpendicular to the protruding direction P. The first opposing surface 64b faces the surface of the bottom portion 51a on one side in the protruding direction (+P side) in the protruding direction P. The first opposing surface 64b may be in contact with the bottom portion 51a, or may face the bottom portion 51a with a small gap therebetween.

[0068] The second opposing surface 64c is a surface of the outer surface of the guided main body portion 64 that faces one widthwise side (+W side). In the present embodiment, the second opposing surface 64c is a flat surface that is perpendicular to the widthwise direction W. The second opposing surface 64c faces a surface of the base portion 54a of the first guide wall portion 54 on the other widthwise side (-W side). The second opposing surface 64c may be in contact with the base portion 54a, or may face the base portion 54a with a small gap therebetween.

[0069] The third opposing surface 64d is a surface of the outer surface of the guided main body portion 64 that faces one side in the width direction (+W side) and one side in the protruding direction (+P side). In the present embodiment, the third opposing surface 64d is a surface that faces the left side (-Y side) and is a flat surface that is perpendicular to the left-right direction Y. The third opposing surface 64d faces the right side (+Y side) of the inclined portion 54b of the first guide wall portion 54. The third opposing surface 64d may be in contact with the inclined portion 54b or may face the inclined portion 54b with a small gap between them. The third opposing surface 64d is located behind the left side (-Y side) surface of the side wall portion 67c and smoothly connects to the left side surface of the side wall portion 67c.

[0070] The fourth opposing surface 64e is a surface of the outer surface of the guided main body portion 64 that faces the other widthwise side (-W side). In the present embodiment, the fourth opposing surface 64e is a flat surface that is perpendicular to the widthwise direction W. The fourth opposing surface 64e faces a surface of the second guide wall portion 55 on one widthwise side (+W side). The fourth opposing surface 64e may be in contact with the second guide wall portion 55, or may face the second guide wall portion 55 with a small gap therebetween.

[0071] 12, the dimension in the width direction W of the guided main body portion 64 is greater than the distance between the end portion on one side in the protruding direction (+P side) of the first guide wall portion 54 and the end portion on one side in the protruding direction of the second guide wall portion 55. Therefore, the guided main body portion 64 is prevented from slipping out from the inside of the guide rail portion 51 through the gap between the end portion on one side in the protruding direction of the first guide wall portion 54 and the end portion on one side in the protruding direction of the second guide wall portion 55. This prevents the first guided portion 61 from coming off the guide rail portion 51.

[0072] As shown in FIG. 11 , in this embodiment, the second guided portion 62 protrudes rearward (negative X-side) from the protruding case portion 41d of the second case member 41b. The second guided portion 62 has a generally pentagonal prism shape extending in the vertical direction Z. The second guided portion 62 is disposed below the first guided portion 61 at a distance. More specifically, the second guided portion 62 is disposed below the guided main body portion 64 at a distance. That is, the second guided portion 62 is disposed at a position overlapping the guided main body portion 64 when viewed in the vertical direction Z. As shown in FIG. 8 , the rear portion of the second guided portion 62 is inserted inside the guide rail portion 51. The second guided portion 62 is supported by the guide rail portion 51 so as to be movable in the vertical direction Z during installation and removal of the refrigerant sensor unit 40.

[0073] 11 , the second guided portion 62 has a fifth opposing surface 62b, a sixth opposing surface 62c, a seventh opposing surface 62d, and a right side surface 62e. The fifth opposing surface 62b, the sixth opposing surface 62c, the seventh opposing surface 62d, and the right side surface 62e are outer surfaces of the second guided portion 62. The second guided portion 62 is supported by the guide rail portion 51 with the fifth opposing surface 62b, the sixth opposing surface 62c, and the seventh opposing surface 62d being supported facing the inner surface of the guide rail portion 51.

[0074] The fifth opposing surface 62b is a surface of the outer surface of the second guided portion 62 facing the other side in the protruding direction (-P side). In the present embodiment, the fifth opposing surface 62b is a flat surface perpendicular to the protruding direction P. The fifth opposing surface 62b is a surface that is disposed on the same plane as the first opposing surface 64b. The fifth opposing surface 62b faces the surface of the bottom portion 51a on one side in the protruding direction (+P side) in the protruding direction P. The fifth opposing surface 62b may be in contact with the bottom portion 51a, or may face the bottom portion 51a with a small gap therebetween.

[0075] The sixth opposing surface 62c is a surface of the outer surface of the second guided portion 62 that faces one side in the width direction (+W side). In the present embodiment, the sixth opposing surface 62c is a flat surface that is perpendicular to the width direction W. The sixth opposing surface 62c is a surface that is disposed on the same plane as the second opposing surface 64c. The sixth opposing surface 62c faces the surface of the base 54a of the first guide wall portion 54 on the other side in the width direction (-W side). The sixth opposing surface 62c may be in contact with the base 54a, or may face the base 54a with a small gap therebetween.

[0076] The seventh opposing surface 62d is a surface of the outer surface of the second guided portion 62 that faces one side in the width direction (+W side) and one side in the protruding direction (+P side). In this embodiment, the seventh opposing surface 62d is a surface that faces the left side (-Y side) and is a flat surface that is perpendicular to the left-right direction Y. The seventh opposing surface 62d is a surface that is disposed on the same plane as the third opposing surface 64d. The seventh opposing surface 62d faces the right side (+Y side) of the inclined portion 54b of the first guide wall portion 54. The seventh opposing surface 62d may be in contact with the inclined portion 54b or may face the inclined portion 54b with a small gap therebetween. The seventh opposing surface 62d extends rearward from the rear (-X side) surface of the protruding case portion 41d.

[0077] The right side surface 62e is the surface facing the right side (+Y side) of the outer surface of the second guided portion 62. The right side surface 62e is a flat surface parallel to the seventh opposing surface 62d and perpendicular to the left-right direction Y. The right side surface 62e extends rearward from the rear side (-X side) surface of the protruding case portion 41d. The rear end of the right side surface 62e is connected to the end of the fifth opposing surface 62b on the other widthwise side (-W side).

[0078] A recessed portion 62f is formed in the second guided portion 62. The recessed portion 62f is recessed from the rear end (-X side) of the second guided portion 62 to the front end (+X side). The recessed portion 62f is formed in the center of the rear end of the second guided portion 62 in the vertical direction Z. The recessed portion 62f penetrates the rear end of the second guided portion 62 in the left-right direction Y. The surface of the recessed portion 62f facing the rear side is a flat surface that is perpendicular to the front-rear direction X. The recessed portion 62f is formed across the fifth opposing surface 62b and the sixth opposing surface 62c.

[0079] The fixed portion 63 is a portion that is fixed to the first attachment portion 50. The fixed portion 63 protrudes rearward (negative X-axis direction) from the lower end of the rear wall portion 41c of the second case member 41b. The fixed portion 63 has a connecting portion 63a that protrudes downward from the lower end of the rear wall portion 41c, an extending portion 63b that extends rearward from the lower end of the connecting portion 63a, a contact portion 63c that connects to the rear end of the extending portion 63b, and a rib portion 63k that connects to the connecting portion 63a and the extending portion 63b. The connecting portion 63a is connected to the center in the left-right direction Y of the lower end of the rear wall portion 41c.

[0080] As shown in FIG. 6, the extension portion 63b has a bottom wall portion 63d and a pair of side wall portions 63e, 63f. The bottom wall portion 63d is plate-shaped with its plate surface facing the vertical direction Z. The side wall portion 63e protrudes downward from the right edge (+Y side) of the bottom wall portion 63d. The side wall portion 63f protrudes downward from the left edge (-Y side) of the bottom wall portion 63d. The side wall portion 63f has a first portion 63g and a second portion 63h connected to the rear end of the first portion 63g. The first portion 63g and the side wall portion 63e extend in directions separating from each other in the left-right direction Y as they move toward the rear side (-X side). The second portion 63h extends from the rear end of the first portion 63g toward the other side of the protrusion direction (-P side).

[0081] The contact portion 63c is connected to the rear end of the extension portion 63b. As shown in FIG. 14, in this embodiment, the contact portion 63c has a substantially square shape, when viewed in the vertical direction Z, having a pair of sides extending in the protruding direction P and a pair of sides extending in the width direction W. The contact portion 63c has a contact main body portion 63i, a first side wall portion 63j, a second side wall portion 63m, and a third side wall portion 63p. The contact main body portion 63i protrudes from the rear end of the bottom wall portion 63d of the extension portion 63b toward the other side in the protruding direction (-P side). In this embodiment, the contact main body portion 63i is plate-shaped with its plate surface facing the vertical direction Z. The contact main body portion 63i contacts the first protruding wall portion 52a of the leg portion 52 of the first mounting portion 50 from below. As a result, the contact portion 63c contacts the first mounting portion 50 from below in the vertical direction Z.

[0082] The first side wall 63j protrudes downward from an edge of the contact main body 63i on one widthwise side (+W side). The second side wall 63m protrudes downward from an edge of the contact main body 63i on the other widthwise side (-W side). The first side wall 63j and the second side wall 63m are spaced apart in the widthwise direction W and extend in the protruding direction P. The first side wall 63j is connected to an end of the second portion 63h on the other protruding side (-P side). The first side wall 63j and the second portion 63h are smoothly connected to form a wall extending in the protruding direction P. The second side wall 63m is connected to the rear end of the side wall 63e. The second side wall 63m is bent toward the other protruding side with respect to the side wall 63e. The third side wall portion 63p protrudes downward from the edge portion on the other side in the protruding direction of the contact main body portion 63i. The third side wall portion 63p extends in the width direction W and connects the end portion on the other side in the protruding direction of the first side wall portion 63j and the end portion on the other side in the protruding direction of the second side wall portion 63m.

[0083] As shown in Fig. 11, the rib portion 63k protrudes upward from the upper surface of the extension portion 63b. The rib portion 63k is plate-shaped with its plate surface facing the left-right direction Y and extends in the front-rear direction X. The front (+X side) end of the rib portion 63k is connected to the rear (-X side) surface of the connection portion 63a. The rib portions 63k are arranged side by side at intervals in the left-right direction Y. When viewed in the left-right direction Y, the rib portion 63k has a substantially triangular shape.

[0084] A hole 66 is formed in the contact portion 63c. The hole 66 penetrates the contact main body portion 63i in the vertical direction Z. The hole 66 is a circular hole. As shown in FIG. 14 , a fixing portion 70 is passed through the hole 66 in the vertical direction Z.

[0085] The contact portion 63c is sandwiched between the pair of sandwiching walls 58a, 58b in a width direction W intersecting with the vertical direction Z. This causes the pair of sandwiching walls 58a, 58b to catch on the contact portion 63c in the width direction W. That is, the second rotation preventing portion 58 catches on the contact portion 63c in the width direction W intersecting with the vertical direction Z. In the present embodiment, a central portion of the contact portion 63c in the protruding direction P is located between the pair of sandwiching walls 58a, 58b in the width direction W. The contact portion 63c may be in contact with the pair of sandwiching walls 58a, 58b, or may face the pair of sandwiching walls 58a, 58b with a small gap therebetween.

[0086] The second attachment portion 60 has a pair of protrusions 65a, 65b protruding from the contact portion 63c. The protrusion 65a protrudes toward one widthwise side (+W side) from a portion of the contact portion 63c that is located on the other protrusion direction side (-P side) of the pair of sandwiching walls 58a, 58b. In this embodiment, the protrusion 65a protrudes toward one widthwise side from the end of the first side wall portion 63j on the other protrusion direction side.

[0087] The protruding portion 65b protrudes from a portion of the contact portion 63c that is located on one side in the protruding direction (+P side) of the pair of sandwiching walls 58a, 58b toward the other side in the width direction (-W side). In the present embodiment, the protruding portion 65b protrudes from an end portion on one side in the protruding direction of the second side wall portion 63m toward the other side in the width direction.

[0088] The protruding portion 65a is located on the other protruding direction side (-P side) of the sandwiching wall portion 58a, and faces the sandwiching wall portion 58a in the protruding direction P. The protruding portion 65b is located on one protruding direction side (+P side) of the sandwiching wall portion 58b, and faces the sandwiching wall portion 58b in the protruding direction P. As described above, in the present embodiment, each of the pair of protruding portions 65a, 65b is disposed opposite the pair of sandwiching wall portions 58a, 58b in the protruding direction P that intersects both the width direction W and the vertical direction Z in which the pair of sandwiching wall portions 58a, 58b sandwich the contact portion 63c.

[0089] The protruding portion 65a is hooked onto the sandwiching wall portion 58a from the other side in the protruding direction (-P side). The protruding portion 65b is hooked onto the sandwiching wall portion 58b from one side in the protruding direction (+P side). In this manner, in the present embodiment, each of the pair of protruding portions 65a, 65b is hooked onto the pair of sandwiching wall portions 58a, 58b, respectively, in the protruding direction P that intersects both the width direction W and the vertical direction Z in which the pair of sandwiching wall portions 58a, 58b sandwich the contact portion 63c.

[0090] 9, in this embodiment, the fixing portion 70 is a screw member. The fixing portion 70 is passed through the hole portion 66 from below in the vertical direction Z and screwed into the threaded hole 57 formed in the first mounting portion 50. In this way, the fixing portion 70 detachably fixes the second mounting portion 60 to the first mounting portion 50 from below. In this embodiment, the fixing portion 70 detachably fixes the contact portion 63c to the first mounting portion 50.

[0091] Next, the work of removing the refrigerant sensor unit 40 from the indoor unit body 29 will be described. After removing the decorative panel 30 from the indoor unit body 29, the worker removes the drain pan 25 of the indoor unit body 29. The refrigerant sensor unit 40 is electrically connected to the electric component unit 24 by wiring (not shown), and this wiring is passed through a hole formed in the drain pan 25. Therefore, before removing the drain pan 25, the worker removes the wiring from the electric component unit 24, and then removes the drain pan 25 while pulling the wiring out of the hole formed in the drain pan 25.

[0092] With the drain pan 25 removed, the indoor unit body 29 is in the state shown in FIG. 4, with the refrigerant sensor unit 40 attached by the mounting structure 80 exposed downward. In this state, the head of the fixing part 70, which is a screw member, is exposed downward. The worker places a tool such as a screwdriver against the exposed head of the fixing part 70 to turn and remove the fixing part 70. This releases the refrigerant sensor unit 40 from the first mounting part 50. The worker moves the refrigerant sensor unit 40 downward along the guide rail part 51 to remove the refrigerant sensor unit 40.

[0093] The wiring (not shown) electrically connecting the refrigerant sensor unit 40 and the electrical unit 24 is held in a clamp formed on the indoor unit body 29. Therefore, even if the worker lets go of the refrigerant sensor unit 40 when removing the fixing part 70, the wiring will get caught on the clamp, preventing the refrigerant sensor unit 40 from falling. Before or after moving the refrigerant sensor unit 40 downward to remove it from the first mounting part 50, the worker removes the wiring from the clamp while holding the refrigerant sensor unit 40 in their hand.

[0094] Next, the procedure for reinstalling the refrigerant sensor unit 40 to the indoor unit body 29 will be described. The worker brings the refrigerant sensor unit 40 close to the indoor unit 20 from which the decorative panel 30 and drain pan 25 have been removed, and inserts the first guided portion 61 of the second mounting portion 60 from below into the inside of the guide rail portion 51. The worker slides the refrigerant sensor unit 40 upward along the guide rail portion 51. As the refrigerant sensor unit 40 is moved upward, the second guided portion 62 is inserted from below into the inside of the guide rail portion 51. The worker moves the refrigerant sensor unit 40 upward until the contact portion 63c contacts the leg portion 52 of the first mounting portion 50 from below. While holding the refrigerant sensor unit 40 with one hand with the contact portion 63c in contact with the first mounting portion 50, the worker holds a tool such as a screwdriver with the other hand and uses the tool to tighten the fixing portion 70, which is a screw member. As a result, the first mounting portion 50 and the second mounting portion 60 are fixed to each other by the fixing portion 70, and the refrigerant sensor unit 40 is mounted to the indoor unit main body 29 again.

[0095] After fixing the second mounting portion 60 to the first mounting portion 50 with the fixing portion 70, the worker holds the wiring (not shown) extending from the refrigerant sensor unit 40 in the clamp portion described above, and then attaches the drain pan 25. At this time, the worker attaches the drain pan 25 while passing the wiring (not shown) extending from the refrigerant sensor unit 40 through holes formed in the drain pan 25. After attaching the drain pan 25, the worker connects the wiring extending from the refrigerant sensor unit 40 to the electric component unit 24. After connecting the wiring to the electric component unit 24, the worker attaches the decorative panel 30 to the indoor unit main body 29.

[0096] The procedure for working on the wiring (not shown) extending from the refrigerant sensor unit 40 is not particularly limited as long as it is possible to attach and detach the refrigerant sensor unit 40. The wiring may be attached and detached to and from the electrical component unit 24 by a procedure other than the above-described procedure.

[0097] According to this embodiment, a mounting structure 80 for detachably mounting a refrigerant sensor unit 40 as an electronic device within a housing 21 of an indoor unit body 29 in an indoor unit 20 of an air conditioner 100 includes a first mounting portion 50 provided on the indoor unit body 29, a second mounting portion 60 provided on the refrigerant sensor unit 40 and attached to the first mounting portion 50, and a fixing portion 70 for fixing the second mounting portion 60 to the first mounting portion 50. The first mounting portion 50 has a guide rail portion 51 extending in the vertical direction Z. The second mounting portion 60 has a first guided portion 61 that is supported on the guide rail portion 51 so as to be movable in the vertical direction Z during installation or removal of the refrigerant sensor unit 40, and a contact portion 63c that contacts the first mounting portion 50 from below in the vertical direction Z. The fixing portion 70 detachably fixes the second mounting portion 60 to the first mounting portion 50 from below.

[0098] Therefore, as described above, the fixation by the fixing portion 70 can be released from below. After the fixation by the fixing portion 70 is released, the refrigerant sensor unit 40, with the first guided portion 61 supported by the guide rail portion 51, can be moved downward along the guide rail portion 51 to remove the refrigerant sensor unit 40 from the indoor unit body 29. Furthermore, the refrigerant sensor unit 40 can be reattached by moving the refrigerant sensor unit 40 upward along the guide rail portion 51 to bring the contact portion 63c into contact with the first mounting portion 50, and then fixing the second mounting portion 60 to the first mounting portion 50 from below using the fixing portion 70. In other words, the refrigerant sensor unit 40 can be attached to and detached from the indoor unit body 29 simply by working on the refrigerant sensor unit 40 and the mounting structure 80 from below in the vertical direction Z. This allows the refrigerant sensor unit 40 to be easily attached and detached, improving the workability of attaching and detaching the refrigerant sensor unit 40. Therefore, the work of replacing the refrigerant sensor unit 40, the work of repairing the refrigerant sensor unit 40, and the work of maintaining the refrigerant sensor unit 40 can be easily performed.

[0099] Furthermore, because there is no need to move the refrigerant sensor unit 40 and the fixing part 70 in a direction perpendicular to the vertical direction Z, there is no need to provide space within the housing 21 of the indoor unit body 29 for moving the refrigerant sensor unit 40, the fixing part 70, etc. in a direction perpendicular to the vertical direction Z. Furthermore, there is no need to provide space for an operator to insert their hand in a position opposite the refrigerant sensor unit 40 in a direction perpendicular to the vertical direction Z. This reduces the space required to install the refrigerant sensor unit 40 within the housing 21. Therefore, even if the refrigerant sensor unit 40 is installed in a narrow space within the housing 21 where it is difficult to secure space for installation and the operator cannot insert their hand, the refrigerant sensor unit 40 can be easily and detachably installed within the housing 21.

[0100] Here, in order for the refrigerant sensor unit 40 to quickly detect refrigerant 19 leaking from the housing 21, it is preferable to place the refrigerant sensor unit 40 near the end of the heat exchanger 22 to which the refrigerant pipe group 18a is connected. Specifically, in this embodiment, it is preferable to place the refrigerant sensor unit 40 in the pipe accommodating portion 21f, where the one end 22a and the other end 22b of the heat exchanger 22 are located. As described above, the refrigerant pipe group 18a is located in the pipe accommodating portion 21f. Furthermore, the pipe accommodating portion 21f also contains bent portions of the heat transfer tubes of the heat exchanger 22. Therefore, the space available for placing the refrigerant sensor unit 40 tends to be small within the pipe accommodating portion 21f. In this embodiment, even when the refrigerant sensor unit 40 is placed in such a pipe accommodating portion 21f, the refrigerant sensor unit 40 can be easily and detachably attached to the small space, as described above. Therefore, the refrigerant sensor unit 40 can be easily attached and detached while being located in a position within the housing 21 where leaked refrigerant 19 can be easily detected.

[0101] When installing the indoor unit 20 on the ceiling, the refrigerant sensor unit 40 may be attached to the indoor unit main body 29 in advance, for example. In this case, the refrigerant sensor unit 40 can be attached to the indoor unit main body 29 after it has been inverted in the vertical direction Z before installation on the ceiling. In this inverted state in the vertical direction Z, the refrigerant sensor unit 40 is moved downward relative to the guide rail portion 51 until the contact portion 63c contacts the first mounting portion 50, and then the first mounting portion 50 and the second mounting portion 60 are fixed from above by the fixing portion 70. In this case, when tightening the fixing portion 70 to the first mounting portion 50, the refrigerant sensor unit 40 is supported from below by the first mounting portion 50, so there is no need to hold the refrigerant sensor unit 40 by hand. This makes installation of the refrigerant sensor unit 40 easier.

[0102] Furthermore, according to this embodiment, fixing portion 70 detachably fixes contact portion 63c to first mounting portion 50. Therefore, when installing refrigerant sensor unit 40, the worker only needs to fix the portion that abuts from below in vertical direction Z with fixing portion 70. This further improves the workability of installing refrigerant sensor unit 40.

[0103] Furthermore, according to this embodiment, the fixing portion 70 is a screw member that is passed from below in the vertical direction Z through a hole 66 formed in the contact portion 63c and then tightened in the vertical direction Z into a threaded hole 57 formed in the first mounting portion 50. Therefore, the refrigerant sensor unit 40 can be easily released from its fixed state relative to the indoor unit body 29 simply by attaching or detaching the fixing portion 70, which is a screw member, using a tool such as a screwdriver.

[0104] Furthermore, according to the present embodiment, guide rail portion 51 has bottom portion 51a extending in vertical direction Z, and first guide wall portion 54 and second guide wall portion 55 protruding from bottom portion 51a in protruding direction P that intersects vertical direction Z. First guide wall portion 54 and second guide wall portion 55 are arranged opposite to each other with a gap between them in width direction W that intersects both vertical direction Z and protruding direction P, and are arranged with first guided portion 61 sandwiched between them in width direction W. This prevents first guided portion 61 from moving in width direction W relative to guide rail portion 51. This allows refrigerant sensor unit 40 to more appropriately move relative to guide rail portion 51 in vertical direction Z along guide rail portion 51 during installation or removal of refrigerant sensor unit 40.

[0105] Furthermore, according to this embodiment, the dimension of the second guide wall 55 in the protruding direction P is smaller than the dimension of the first guide wall 54 in the protruding direction P. Therefore, when inserting the first guided portion 61 between the first guide wall 54 and the second guide wall 55 from below, the first guided portion 61 can be easily inserted between the first guide wall 54 and the second guide wall 55 by moving the first guided portion 61 closer to the side where the second guide wall 55, which has a relatively small protruding dimension, is located. This makes it easier to support the refrigerant sensor unit 40 on the guide rail 51 when installing the refrigerant sensor unit 40. Furthermore, when removing the refrigerant sensor unit 40, the first guided portion 61 can be easily pulled out from within the guide rail 51. This further improves the ease of installing and removing the refrigerant sensor unit 40.

[0106] Furthermore, according to the present embodiment, the first guide wall 54 has a base 54a that protrudes from the bottom 51a in the protruding direction P, and an inclined portion 54b that connects to the tip of the base 54a in the protruding direction P. As the inclined portion 54b moves away from the base 54a in the protruding direction P, the inclined portion 54b is positioned closer to the first guide wall 54 in the width direction W on the side where the second guide wall 55 is located (the -W side). Therefore, the inclined portion 54b can be disposed opposite one side in the protruding direction (the +P side) of the first guided portion 61. This makes it possible to prevent the first guided portion 61 from slipping out from between the first guide wall 54 and the second guide wall 55 in the width direction W to the one side in the protruding direction.

[0107] Furthermore, according to this embodiment, the dimension of the second guide wall portion 55 in the protruding direction P is smaller than the dimension of the base portion 54a in the protruding direction P. Therefore, it is easier to suitably reduce the dimension of the second guide wall portion 55 in the protruding direction P. This makes it easier to insert the first guided portion 61 between the first guide wall portion 54 and the second guide wall portion 55. Also, it is easier to pull the first guided portion 61 out from between the first guide wall portion 54 and the second guide wall portion 55.

[0108] Furthermore, according to this embodiment, the first guide wall 54 protrudes downward more than the second guide wall 55. This increases the distance between the lower end of the first guide wall 54 and the lower end of the second guide wall 55, thereby widening the lower opening of the guide rail 51. This makes it easier to insert the first guided portion 61 into the inside of the guide rail 51 from below, and to pull the first guided portion 61 downward from the inside of the guide rail 51. Furthermore, as in this embodiment, the first guide wall 54, which has the larger dimension in the protruding direction P between the first guide wall 54 and the second guide wall 55, protrudes downward more than the second guide wall 55. This allows the refrigerant sensor unit 40 to be moved upward while the first guided portion 61 is supported by the lower end of the first guide wall 54. This makes it easier to insert the first guided portion 61 between the first guide wall 54 and the second guide wall 55.

[0109] Furthermore, according to this embodiment, a first inclined surface 64g and a second inclined surface 64h are formed on both sides in the width direction W of the upper surface 64a of the guided main body portion 64 of the first guided portion 61. This allows the corners of the guided main body portion 64 on both sides in the width direction W to be chamfered. This prevents the corners of the guided main body portion 64 from hitting the first guide wall portion 54 and the second guide wall portion 55 when inserting the guided main body portion 64 into the guide rail portion 51 and when pulling the guided main body portion 64 out of the guide rail portion 51. This further improves the ease of attaching and detaching the refrigerant sensor unit 40.

[0110] Furthermore, according to this embodiment, the first guided portion 61 has an arm portion 67 that protrudes toward the guide rail portion 51 and a guided main body portion 64 that is provided at the tip of the arm portion 67 and supported by the guide rail portion 51. The first mounting portion 50 has a first rotation stopper portion 56 that hooks onto the arm portion 67 in a direction intersecting the vertical direction Z. Therefore, when attaching or detaching the refrigerant sensor unit 40, the first rotation stopper portion 56 can prevent the refrigerant sensor unit 40 supported by the guide rail portion 51 from wobbling around an axis extending in the vertical direction Z. This allows the refrigerant sensor unit 40 to slide stably in the vertical direction Z relative to the guide rail portion 51. In particular, because the first rotation stopper portion 56 hooks onto the arm portion 67 of the first guided portion 61, the first rotation stopper portion 56 can preferably prevent the first guided portion 61 from wobbling. This allows the first guided portion 61 to be stably supported by the refrigerant sensor unit 40. Therefore, the refrigerant sensor unit 40 can be slid more stably in the vertical direction Z relative to the guide rail portion 51. Furthermore, when attaching the refrigerant sensor unit 40, the relative positions of the first attachment portion 50 and the second attachment portion 60 can be prevented from shifting in the direction intersecting the vertical direction Z. Therefore, the fixing portion 70 can easily fix the first attachment portion 50 and the second attachment portion 60 together. Specifically, in this embodiment, the position of the hole portion 66 formed in the second attachment portion 60 can be prevented from shifting from the position of the screw hole 57 formed in the first attachment portion 50. Therefore, the fixing portion 70, which is a screw member, can be easily passed through the hole portion 66 and tightened into the screw hole 57.

[0111] Furthermore, according to this embodiment, the arm 67 has a recess 67e recessed downward. The first rotation stopper 56 has a hook 56b that is inserted into the recess 67e from above in the vertical direction Z and catches on the inner surface of the recess 67e. Therefore, even if the refrigerant sensor unit 40 attempts to rotate around an axis extending in the vertical direction Z when attaching or detaching the refrigerant sensor unit 40, the hook 56b comes into contact with the inner surface of the recess 67e, thereby preventing the refrigerant sensor unit 40 from wobbling around the axis extending in the vertical direction Z. In this embodiment, the engaged portion 67d of the arm 67 is sandwiched between the hook 56b and the second guide wall 55 in the protruding direction P, thereby preferably preventing the arm 67 from wobbling around the axis extending in the vertical direction Z. This allows the first guided portion 61 to be more stably supported by the guide rail 51.

[0112] Furthermore, according to this embodiment, the first mounting portion 50 has a second rotation stopper 58 that catches on the contact portion 63c in a direction intersecting the vertical direction Z. Therefore, when the contact portion 63c is in contact with the first mounting portion 50, the second rotation stopper 58 can prevent the contact portion 63c from rattling around an axis extending in the vertical direction Z. This can further prevent the relative positions of the first mounting portion 50 and the second mounting portion 60 from shifting in the direction intersecting the vertical direction Z. Therefore, the fixing portion 70 can more easily fix the first mounting portion 50 and the second mounting portion 60. In particular, the second rotation stopper 58 can effectively prevent the position of the contact portion 63c in which the hole 66 is formed from shifting, which can effectively prevent the hole 66 from shifting relative to the screw hole 57. Therefore, the fixing portion 70 can be easily and effectively fastened to the screw hole 57.

[0113] Furthermore, according to this embodiment, the second rotation preventing portion 58 has a pair of sandwiching walls 58a, 58b that sandwich the contact portion 63c in a direction intersecting the vertical direction Z. The second mounting portion 60 has a pair of protruding portions 65a, 65b that protrude from the contact portion 63c. Each of the pair of protruding portions 65a, 65b is hooked onto the pair of sandwiching walls 58a, 58b in a protruding direction P that intersects both the width direction W and the vertical direction Z, in which the pair of sandwiching walls 58a, 58b sandwich the contact portion 63c. Therefore, the pair of protruding portions 65a, 65b and the pair of sandwiching walls 58a, 58b can more effectively prevent the position of the contact portion 63c from shifting relative to the first mounting portion 50. Specifically, this embodiment can effectively prevent the contact portion 63c from shifting in the protruding direction P and the width direction W. This makes it easier to fix the contact portion 63c to the first mounting portion 50 more suitably by the fixing portion 70 when attaching the refrigerant sensor unit 40.

[0114] Furthermore, according to this embodiment, the first rotation prevention portion 56 can prevent the upper portion of the second mounting portion 60 from wobbling around an axis extending in the vertical direction Z relative to the first mounting portion 50, and the second rotation prevention portion 58 can prevent the lower portion of the second mounting portion 60 from wobbling around an axis extending in the vertical direction Z relative to the first mounting portion 50. This makes it easier to attach the second mounting portion 60 to the first mounting portion 50 in a more stable manner.

[0115] Furthermore, according to the present embodiment, second mounting portion 60 has second guided portion 62 that is supported on guide rail portion 51 so as to be movable in vertical direction Z when installing or removing refrigerant sensor unit 40. Second guided portion 62 is positioned below and spaced apart from first guided portion 61. Therefore, two guided portions, first guided portion 61 and second guided portion 62, can be supported by guide rail portion 51, and refrigerant sensor unit 40 can be moved more stably in vertical direction Z along guide rail portion 51. Furthermore, compared to, for example, a case in which first guided portion 61 is extended to the position of second guided portion 62 without providing second guided portion 62, the overall volume of the guided portions can be reduced, and less material is required to form second mounting portion 60.

[0116] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the configurations of the above-described embodiments, and the following configurations and methods may also be adopted.

[0117] The first mounting portion of the mounting structure provided on the indoor unit body may have any configuration as long as it has a guide rail portion. The first mounting portion may be molded integrally with a part of the indoor unit body. The first direction in which the guide rail portion extends is not particularly limited and may be a direction other than the vertical direction. The guide rail portion may have any configuration as long as it can support the first guided portion so that it can move in the first direction when attaching or detaching the electronic device.

[0118] The second mounting portion of the mounting structure provided on the electronic device may have any configuration as long as it has a first guided portion and a contact portion and is attached to the first mounting portion. The second mounting portion may be a separate member fixed to the main body of the electronic device. The second guided portion does not have to be provided. Instead of providing the second guided portion, the first guided portion may be shaped to extend in the first direction to the position where the second guided portion is provided.

[0119] The fixing portion that fixes the second mounting portion to the first mounting portion may have any configuration as long as it can detachably fix the second mounting portion to the first mounting portion from the first side (lower side). The fixing portion may be, for example, an elastically deformable claw portion that supports the second mounting portion from the first side. The fixing portion may be, for example, a snap-fit ​​structure that detachably fixes the second mounting portion to the first mounting portion.

[0120] The first rotation stopper may have any configuration as long as it can catch on the arm portion of the first guided portion in a direction intersecting the first direction. The second rotation stopper may have any configuration as long as it can catch on the contact portion in a direction intersecting the first direction. At least one of the first rotation stopper and the second rotation stopper may not be provided.

[0121] The electronic device that can be detachably mounted within the housing of the indoor unit main body using the mounting structure according to the present disclosure may be any electronic device. The electronic device may be, for example, a wireless communication unit for wirelessly communicating with an external device. The electronic device may be mounted anywhere within the housing of the indoor unit main body, or on any component. For example, the electronic device may be mounted on the partition wall portion 21e in the above-described embodiment.

[0122] The indoor unit according to the present disclosure may be any type of indoor unit as long as it is an indoor unit for an air conditioner. The indoor unit may be a wall-mounted indoor unit or a floor-standing indoor unit. If the indoor unit is an indoor unit other than one fixed to a ceiling, the first direction in which the guide rail portion extends may be, for example, the front-rear direction X or the left-right direction Y in the above-described embodiment.

[0123] The relative positional relationships and dimensions of the various components described in the above-described embodiments are merely examples, and the relative positional relationships and dimensions of the various components in the present disclosure are not particularly limited as long as they are within the scope of the technical concept of the present disclosure. The configurations and methods described in this specification can be combined as appropriate within the scope of not mutually contradicting each other. [Explanation of symbols]

[0124] 10...Outdoor unit, 20...Indoor unit, 21...Housing, 29...Indoor unit main body, 40...Refrigerant sensor unit (electronic device), 50...First mounting portion, 51...Guide rail portion, 51a...Bottom portion, 54...First guide wall portion, 54a...Base portion, 54b...Inclined portion, 55...Second guide wall portion, 56...First rotation stop portion, 56b...Hook portion, 57...Screw hole, 58...Second rotation stop portion, 58a , 58b... clamping wall portion, 60... second mounting portion, 61... first guided portion, 62... second guided portion, 63c... contact portion, 64... guided main body portion, 65a, 65b... protrusion portion, 66... ​​hole portion, 67... arm portion, 67e... recess portion, 70... fixing portion, 80... mounting structure, 100... air conditioner, P... protrusion direction (second direction), W... width direction (third direction), Z... vertical direction (first direction)

Claims

1. An attachment structure for detachably attaching an electronic device to a housing of an indoor unit body of an air conditioner indoor unit, a first mounting portion provided on the indoor unit main body; a second attachment portion provided in the electronic device and attached to the first attachment portion; a fixing portion that fixes the second mounting portion to the first mounting portion; Equipped with The first attachment portion is a guide rail portion extending in a first direction; A first rotation stopper portion; and The second mounting portion is a first guided portion supported on the guide rail portion so as to be movable in the first direction during attachment / detachment of the electronic device; a contact portion that contacts the first mounting portion from a first side in the first direction; and the fixing portion detachably fixes the second attachment portion to the first attachment portion from the first side, The first guided portion is an arm portion protruding toward the guide rail portion; a guided main body portion provided at a tip end of the arm portion and supported by the guide rail portion; and An attachment structure in which the first rotation prevention portion is hooked onto the arm portion in a direction intersecting the first direction.

2. A mounting structure for detachably mounting an electronic device within a housing of an indoor unit body of an air conditioner indoor unit, a first mounting portion provided on the indoor unit main body; a second attachment portion provided in the electronic device and attached to the first attachment portion; a fixing portion that fixes the second mounting portion to the first mounting portion; Equipped with The first attachment portion is a guide rail portion extending in a first direction; A second rotation stopper portion; and The second mounting portion is a first guided portion supported on the guide rail portion so as to be movable in the first direction during attachment / detachment of the electronic device; a contact portion that contacts the first mounting portion from a first side in the first direction; and the fixing portion detachably fixes the second attachment portion to the first attachment portion from the first side, An attachment structure in which the second rotation prevention portion is hooked onto the contact portion in a direction intersecting the first direction.

3. A mounting structure for detachably mounting an electronic device within a housing of an indoor unit body of an air conditioner indoor unit, a first mounting portion provided on the indoor unit main body; a second attachment portion provided in the electronic device and attached to the first attachment portion; a fixing portion that fixes the second mounting portion to the first mounting portion; Equipped with the first mounting portion has a guide rail portion extending in a first direction, The second mounting portion is a first guided portion supported on the guide rail portion so as to be movable in the first direction during attachment / detachment of the electronic device; a contact portion that contacts the first mounting portion from a first side in the first direction; and the fixing portion detachably fixes the second attachment portion to the first attachment portion from the first side, The guide rail portion is a bottom portion extending in the first direction; a first guide wall portion and a second guide wall portion protruding from the bottom portion in a second direction intersecting the first direction; and the first guide wall portion and the second guide wall portion are disposed opposite to each other at an interval in a third direction that intersects both the first direction and the second direction, and are disposed with the first guided portion sandwiched therebetween in the third direction, The first guide wall portion is a base portion protruding from the bottom portion in the second direction; an inclined portion connected to a tip end portion of the base portion in the second direction; and An attachment structure in which the inclined portion is positioned on a side in the third direction where the second guide wall portion is located relative to the first guide wall portion as the inclined portion moves away from the base portion in the second direction.

4. The mounting structure according to claim 1 , wherein the fixing portion detachably fixes the contact portion to the first mounting portion.

5. 5. The mounting structure according to claim 4, wherein the fixing portion is a screw member that is passed through a hole formed in the contact portion from the first side in the first direction and tightened in the first direction into a screw hole formed in the first mounting portion.

6. The mounting structure according to claim 3 , wherein a dimension of the second guide wall portion in the second direction is smaller than a dimension of the first guide wall portion in the second direction.

7. The mounting structure according to claim 3 , wherein a dimension of the second guide wall portion in the second direction is smaller than a dimension of the base portion in the second direction.

8. The mounting structure according to claim 3 , wherein the first guide wall portion protrudes further toward the first side than the second guide wall portion.

9. a recess formed in the arm portion that is recessed toward the first side; The mounting structure according to claim 1 , wherein the first rotation preventing portion has a hook portion that is inserted into the recess from a second side in the first direction and that catches on an inner surface of the recess.

10. the second rotation preventing portion has a pair of sandwiching walls that sandwich the contact portion in a direction intersecting the first direction, the second attachment portion has a pair of protrusions protruding from the contact portion, The mounting structure according to claim 2 , wherein each of the pair of protrusions is hooked onto each of the pair of sandwiching wall portions in a direction intersecting both the direction in which the pair of sandwiching wall portions sandwich the contact portion and the first direction.

11. the second mounting portion has a second guided portion supported by the guide rail portion so as to be movable in the first direction during attachment / detachment of the electronic device; The mounting structure according to claim 1 , wherein the second guided portion is disposed away from the first guided portion on the first side.

12. An indoor unit of an air conditioner, The indoor unit body, The mounting structure according to any one of claims 1 to 11; an electronic device that is mounted in a housing of the indoor unit main body by the mounting structure; An indoor unit comprising:

13. The indoor unit according to claim 12; The outdoor unit and An air conditioner comprising:

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