air conditioner

Abstract

An air conditioner provided with: an indoor unit; an outdoor unit; a refrigerant pipe that connects heat exchangers of the indoor unit and the indoor unit to each other; and a ventilation device that ventilates indoor air. The ventilation device comprises a base body in which an air passage is provided. The base body has a first member and a second member assembled to each other in an assembly direction, and a sealing part. The first member and the second member have facing surfaces facing each other, at least one of the facing surfaces is provided with recess part that is covered by the other and forms an air passage, at least one of the facing surfaces is provided with a projection part surrounding the air passage, and the other is provided with a groove part in which the projection part is accommodated. The groove part includes a first groove and a second groove provided in the bottom surface of the first groove. The tip of the projection part is disposed inside the second groove, and the sealing part is in contact with at least the projection part inside the second groove.

Description

[Technical Field]

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

[0002] In recent years, air conditioners that maintain a comfortable indoor temperature environment by exchanging heat with indoor air using a heat exchanger inside the indoor unit and supplying the air indoors have become common. Since these air conditioners only circulate the indoor air using the indoor unit and do not ventilate the air with the outdoors, the indoor air becomes polluted if the room is left sealed for a long period of time. Therefore, air conditioners equipped with a ventilation fan that exhausts indoor air to the outdoors have been disclosed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3570260 Summary of the Invention [Problem to be solved by the invention]

[0004] The air conditioning device of Patent Document 1 is provided with a guide path that guides air toward a ventilation fan. Furthermore, seal rings are placed between the components that make up the guide path, and these seal rings prevent air from being sucked in through gaps between the components. When a sealing means with such a conventional structure is applied to an air path with a complex shape, there is a risk that the sealing performance will be insufficient.

[0005] In view of the above circumstances, the present disclosure has an object to provide an air conditioner that can improve the airtightness of the air passage within the ventilation device. [Means for solving the problem]

[0006] One aspect of an air conditioner according to the present disclosure includes an indoor unit installed indoors and having a first heat exchanger, an outdoor unit installed outdoors and having a second heat exchanger, refrigerant piping that passes through a through-hole in a wall separating the indoor space from the outdoor space and connects the first heat exchanger and the second heat exchanger, and a ventilation device that ventilates air inside the indoor space, the ventilation device having a ventilation piping that passes from the indoor space to the outdoor space through the through-hole, a base body that is connected to the ventilation piping outside the outdoor space, and a ventilation fan supported by the base body, an air passage that connects the ventilation piping and the ventilation fan is provided inside the base body, and the base body includes a first member and a second member that are assembled together in an assembly direction, and the first member and the second member are connected to each other in an assembly direction. and a sealing portion disposed between a first member and the second member, wherein the first member has a first opposing surface facing the assembly direction, the second member has a second opposing surface opposing the first opposing surface, at least one of the first opposing surface and the second opposing surface is provided with a recess that is covered by the other to form the air passage, the first opposing surface is provided with a protrusion that surrounds the air passage when viewed from the assembly direction and protrudes toward the second opposing surface, and the second opposing surface is provided with a groove that houses the protrusion, the groove having a first groove and a second groove provided in a bottom surface of the first groove, a tip of the protrusion is disposed inside the second groove, and the sealing portion contacts at least the protrusion inside the second groove. The sealing portion is a sealant filled in the second groove and adhered to the inner surface of the second groove and the protrusion portion, respectively, and the bottom surface of the first groove has a first region located on the air passage side of the second groove in the width direction of the groove portion, and a second region located on the opposite side of the air passage from the second groove in the width direction, and the first region has a larger dimension in the width direction than the second region. One aspect of an air conditioner according to the present disclosure includes an indoor unit installed indoors and having a first heat exchanger, an outdoor unit installed outdoors and having a second heat exchanger, refrigerant piping that passes through a through-hole in a wall separating the indoor space from the outdoor space and connects the first heat exchanger and the second heat exchanger, and a ventilation device that ventilates air inside the indoor space, the ventilation device including a ventilation piping that passes from the indoor space to the outdoor space through the through-hole, a base body that is connected to the ventilation piping outside the outdoor space, and a ventilation device supported by the base body. and a ventilation fan that is fixed to the ventilation pipe, and an air passage that connects the ventilation pipe and the ventilation fan is provided inside the base main body, and the base main body has a first member and a second member that are assembled together in an assembly direction, and a sealing portion that is arranged between the first member and the second member, and the first member has a first opposing surface that faces the assembly direction, and the second member has a second opposing surface that faces the first opposing surface, and at least one of the first opposing surface and the second opposing surface has a sealing portion that is fixed to the other a recess that is covered by the sealing member and forms the air passage, and a protrusion that surrounds the air passage when viewed from the assembly direction and protrudes toward the second opposing surface is provided on the first opposing surface, and a groove that houses the protrusion is provided on the second opposing surface, the groove having a first groove and a second groove provided on a bottom surface of the first groove, a tip of the protrusion is disposed inside the second groove, and the sealing member is in contact with at least the protrusion inside the second groove, and the sealing member is made of a porous elastic member the sealing portion is compressed by the protrusion portion within the groove portion, and the bottom surface of the first groove has a first region located on one side of the second groove in the width direction of the groove portion and a second region located on the other side of the second groove in the width direction, and the sealing portion has a first compressed portion sandwiched between the first region and the first opposing surface, a second compressed portion sandwiched between the second region and the first opposing surface, and a bent portion sandwiched and bent between an outer surface of the protrusion portion and an inner surface of the second groove. . [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an air conditioner that can improve the airtightness of the air passage within the ventilation device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing a general configuration of an air conditioner according to an embodiment. [Figure 2] 1 is a schematic side view of an installation state of an air conditioner according to an embodiment. FIG. [Figure 3]1 is a schematic perspective view of an installation state of an air conditioner according to an embodiment. [Figure 4] FIG. 2 is an exploded view of the ventilation device main body according to the embodiment. [Figure 5] FIG. 2 is a perspective view of the base body of the embodiment as seen obliquely from the rear. [Figure 6] FIG. 2 is an exploded view of the base body of the embodiment. [Figure 7] FIG. 2 is a front view of a first member according to the embodiment. [Figure 8] FIG. 10 is a rear view of the second member of the embodiment. [Figure 9] 9 is a partial cross-sectional view of the base body taken along line IX-IX in FIG. 5. FIG. [Figure 10] FIG. 6 is a partial cross-sectional view of the base body taken along line XX in FIG. 5. [Figure 11] FIG. 10 is a partial cross-sectional view of a base body having an alternative sealing portion. [Figure 12] FIG. 10 is a front view of an accommodating recess and an end portion of a sealing portion according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] 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.

[0010] 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 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 Z-axis arrow points (+Z direction) is referred to as the upside, and the side of the vertical direction Z opposite to the side toward which the Z-axis arrow points (-Z direction) is referred to as the downside. Furthermore, the side of the front-rear direction X toward which the X-axis arrow points (+X direction) is referred to as the front, and the side of the front-rear direction X opposite to the side toward which the X-axis arrow points (-X direction) is referred to as the rear. In addition, the side of the left-right direction Y toward which the Y-axis arrow points (+Y direction) is defined as the left, and the side opposite to the side toward which the Y-axis arrow points (-Y direction) is defined as the right.

[0011] <Overall structure> FIG. 1 is a schematic diagram showing the general configuration of an air conditioner 100 according to the present embodiment. As shown in FIG. 1, the air conditioner 100 comprises an outdoor unit 10, an indoor unit 20, a circulation path section (refrigerant piping) 18, and a ventilation device 30. The outdoor unit 10 is disposed outdoors 7. The indoor unit 20 is disposed indoors 8. The outdoor unit 10 and the indoor unit 20 are connected to each other by a circulation path section 18 through which a refrigerant 19 circulates. A portion of the ventilation device 30 is disposed indoors 8, and another portion is disposed outdoors 7. The ventilation device 30 discharges air from the room 8 in which the indoor unit 20 is disposed to the outdoors 7.

[0012] The air conditioner 100 is capable of adjusting the temperature of the air in the room 8 by exchanging heat between the refrigerant 19 flowing in the circulation path portion 18 and the air in the room 8 in which the indoor unit 20 is located. Examples of the refrigerant 19 include fluorine-based refrigerants and hydrocarbon-based refrigerants, which have a low global warming potential (GWP).

[0013] The outdoor unit 10 includes an outdoor unit housing 11, a compressor 12, a heat exchanger 13, a flow control valve 14, a blower 15, a four-way valve 16, and a control unit 17. The outdoor unit housing 11 houses the compressor 12, the heat exchanger 13, the flow control valve 14, the blower 15, the four-way valve 16, and the control unit 17.

[0014] 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 outdoor unit 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 outdoor unit housing 11.

[0015] 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.

[0016] The indoor unit 20 includes an indoor unit housing 21, a heat exchanger 22, a blower 23 as a blower, and a control unit 24. The indoor unit housing 21 houses the heat exchanger 22, the blower 23, and the control unit 24 inside. The indoor unit 20 is capable of cooling operation to cool the air in the room 8 in which the indoor unit 20 is located, and heating operation to warm the air in the room 8 in which the indoor unit 20 is located. Note that the blower 23 is shown schematically in FIG. 1.

[0017] 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.

[0018] 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.

[0019] <Indoor unit> 2 and 3 are schematic diagrams showing the installation state of the air conditioner 100 according to the embodiment. 2, the indoor unit 20 is a wall-mounted indoor unit that is fixed to an upper region of a wall surface 9a of the room 8. The indoor unit 20 has a generally rectangular parallelepiped shape that is long in the left-right direction Y.

[0020] As shown in Fig. 2, the blower 23 is housed in the indoor unit housing 21. The blower 23 extends in the left-right direction Y. The blower 23 rotates around a rotation axis by a fan motor 23a. The heat exchanger 22 is disposed inside the indoor unit housing 21, between the blower 23 and the indoor unit air inlet 20a. The heat exchanger 22 extends in the left-right direction Y.

[0021] The indoor unit casing 21 has an outer shell member 21b and an air passage member 21d. The outer shell member 21b is a member that constitutes part of the outer shell of the indoor unit casing 21. The outer shell member 21b improves the design of the exterior of the indoor unit 20. The outer shell member 21b is in the shape of a roughly rectangular parallelepiped box that opens on the wall surface 9a side. The opening of the outer shell member 21b on the wall surface 9a side is closed by the air passage member 21d. The air passage member 21d is a member that constitutes part of the air passage through which air drawn into the indoor unit casing 21 by the blower 23 passes. The air passage member 21d is hooked onto an installation plate (not shown) that is fixed to the wall surface 9a on the room 8 side. This fixes the indoor unit 20 to the wall surface 9a.

[0022] The indoor unit casing 21 has an indoor unit inlet 20a and an indoor unit outlet 20b. In this embodiment, the indoor unit inlet 20a and the indoor unit outlet 20b are formed in the outer shell member 21b. The indoor unit inlet 20a opens upward and extends in the axial direction. A filter (not shown) is disposed in the indoor unit inlet 20a. On the other hand, the indoor unit outlet 20b opens toward the room 8 and extends in the axial direction. An air direction control vane 25 is disposed in the indoor unit outlet 20b.

[0023] Air from the room 8 is drawn into the indoor unit housing 21 through the indoor unit inlet 20a by driving the blower 23. The air drawn into the indoor unit housing 21 through the indoor unit inlet 20a passes through the heat exchanger 22 and is blown out into the room 8 from the indoor unit outlet 20b. The air passing through the indoor unit outlet 20b is blown by the air direction control vane 25 in the vertical direction Z and the left-right direction Y of the room 8.

[0024] A control unit 24 is provided inside the indoor unit housing 21. The control unit 24 is disposed inside the indoor unit housing 21 at one end in the left-right direction Y. The control unit 24 controls the fan motor 23a, the airflow direction control vane 25, the heat exchanger 22, etc.

[0025] The external shape of the indoor unit housing 21 is a rectangular pillar extending in the left-right direction Y. The indoor unit housing 21 has an upper surface 21p facing upward and a lower surface 21q facing downward. The indoor unit air inlet 20a is provided on the upper surface 21p. The indoor unit air outlet 20b is provided on the lower surface 21q.

[0026] As shown in Fig. 3, a drain hose 20d is provided to the indoor unit 20. The tip of the drain hose 20d extends to the outdoors 7. The drain hose 20d discharges drain water that condenses on the heat exchanger 22 to the outdoors 7 during cooling.

[0027] <Outdoor unit> The outdoor unit 10 is placed outdoors 7. The outdoor unit housing 11 has an outdoor unit inlet 11b and an outdoor unit outlet 11a. Inside the outdoor unit housing 11, a blower 15 (see FIG. 1) sends air from the outdoor unit inlet 11b side through a heat exchanger 13 (see FIG. 1) toward the outdoor unit outlet 11a, promoting heat exchange in the heat exchanger 13.

[0028] As shown in FIG. 3 , the outdoor unit 10 and the indoor unit 20 are connected by a circulation path section 18 and a first electrical wiring 10e. The circulation path section 18 is configured in a loop shape between the outdoor unit 10 and the indoor unit 20. Therefore, the circulation path section 18 connects the outdoor unit 10 and the indoor unit 20 with a pair of pipes. The first electrical wiring 10e includes a power supply line that supplies power to the outdoor unit 10 via the indoor unit 20, and a signal line for controlling the outdoor unit 10 and the indoor unit 20 in cooperation with each other. The circulation path section 18 and the first electrical wiring 10e pass through a through-hole 9h provided in the wall 9 that separates the indoor space 8 from the outdoor space 7. As a result, the circulation path section 18 and the first electrical wiring 10e are drawn from the indoor space 8 to the outdoor space 7.

[0029] <Ventilation equipment> The ventilation device 30 is a device that ventilates the room 8 by discharging the air from the room 8 to the outside 7, thereby keeping the air in the room 8 clean. The ventilation device 30 may be driven in conjunction with the indoor unit 20 and the outdoor unit 10, or may be driven independently of these.

[0030] The ventilation device 30 has a ventilation intake section 32, ventilation piping 31, and a ventilation device main body 50. The ventilation intake section 32 is attached to the indoor unit 20 inside the room 8. The ventilation device main body 50 is installed on a wall surface 9b of the outdoor room 7. The ventilation piping 31 extends across the indoor room 8 and the outdoor room 7.

[0031] The ventilation intake section 32 draws in air from the room 8. The ventilation intake section 32 is provided on the surface of the indoor unit casing 21. In the present embodiment, the ventilation intake section 32 is located on the lower surface 21q of the indoor unit casing 21.

[0032] The ventilation pipe 31 is a tubular pipe. The ventilation pipe 31 connects the ventilation device main body 50 and the ventilation intake section 32. Therefore, one end of the ventilation pipe 31 is located inside the room 8, and the other end is located outside the room 7. The ventilation pipe 31 passes through the inside of the indoor unit housing 21 and the through-hole 9h in the wall 9, and is drawn out to the outside the room 7.

[0033] FIG. 4 is an exploded view of the ventilation device main body 50. As shown in FIG. In the following description of the ventilation device main body 50, the direction perpendicular to the vertical direction Z along the wall surface 9b to which the ventilation device main body 50 is attached is the left-right direction Y, and the direction perpendicular to the wall surface 9b is the front-rear direction X. Furthermore, in the following description, among the directions perpendicular to the wall surface 9b, the direction away from the wall surface 9b is referred to as the forward (+X direction), and the direction approaching the wall surface 9b is referred to as the backward (-X direction). Furthermore, in the following description of the ventilation device main body 50, left and right are defined based on the posture of an observer facing forward (+X direction). In other words, the left-hand side of an observer facing the opposite side (+X direction) of the wall surface 9b is referred to as the left side (+Y direction), and the right-hand side is referred to as the right side (-Y direction). In this embodiment, the left-right direction of the ventilation device main body 50 and the left-right direction of the outdoor unit 10 coincide with each other, but these left-right directions do not necessarily have to coincide with each other.

[0034] The ventilation device main body 50 has a ventilation fan 51, a duct member 52, a backflow check valve 53, a base 80, a joint member 75, and a case 40.

[0035] The base 80 is fixed to the wall surface 9b with fixing screws (not shown). The base 80 supports other components of the ventilation device main body 50. The ventilation piping 31 (see FIG. 3) is connected to the base 80. The base 80 has a base main body 60, an installation plate 70, and a drain valve 69.

[0036] The mounting plate 70 is a plate-shaped member made of sheet metal. The mounting plate 70 is disposed between the base body 60 and the wall surface 9b. The mounting plate 70 protects the wall surface 9b. The upper end of the case 40 is engaged with the upper end 70a of the mounting plate 70. The lower end 70c of the mounting plate 70 is bent forward. The lower end of the case 40 is screwed to the lower end 70c of the mounting plate 70.

[0037] The base main body 60 is a box-shaped member, and has an air passage 60F provided therein. The air passage 60F is an air flow path connecting the ventilation pipe 31 (see FIG. 3) and the ventilation fan 51. The base main body 60 also has a drain hole (not shown) that connects the air passage 60F to the outside space. The drain hole drains condensed water that accumulates in the air passage 60F. A drain valve 69 is attached to the drain hole. The drain valve 69 closes the drain hole when the ventilation fan 51 is driven and negative pressure is created inside the air passage.

[0038] The ventilation fan 51 is fixed to the base body 60 from the front (+X direction). The ventilation fan 51 has a cylindrical rotor 51a centered on a central axis extending in the front-rear direction X, a fan motor 51b that rotates the rotor 51a, a fan box 51c that houses the rotor 51a and the fan motor 51b, and a terminal block 51e. The ventilation fan 51 of this embodiment is a so-called sirocco fan. The ventilation fan 51 rotates the rotor 51a to send air from the inner diameter side to the outer diameter side of the rotor 51a.

[0039] The fan box 51c is fixed to the base body 60 from the front (+X direction). A rotor 51a and a fan motor 51b are disposed inside the fan box 51c. The fan box 51c has a fan inlet (not shown) connected to the opening 62a of the base body 60, and a fan outlet 51d facing downward. As the rotor 51a rotates, the ventilation fan 51 draws air from the air passage 60F of the base body 60 at the fan inlet and blows the air downward from the fan outlet 51d.

[0040] The terminal block 51e supports a plurality of terminals (not shown) extending from the fan motor 51b. Electrical wiring (not shown) extending from the indoor unit 20 or the outdoor unit 10 is connected to these terminals.

[0041] The backflow check valve 53 is attached to the fan outlet 51d. The backflow check valve 53 closes the fan outlet 51d. The backflow check valve 53 opens as the ventilation fan 51 blows air out of the fan outlet 51d. The backflow check valve 53 prevents air from flowing back from the fan outlet 51d toward the inside of the ventilation fan 51.

[0042] Duct member 52 is attached to case 40. Duct member 52 is disposed directly below fan outlet 51d. Duct member 52 guides air blown downward from fan outlet 51d to exhaust port 46a provided at the lower end of case 40.

[0043] The case 40 is box-shaped and opens to the rear. The case 40 is supported by a mounting plate 70. The case 40 covers the base 80 of the ventilator main body 50, the ventilation fan 51, the backflow check valve 53, and the duct member 52. In this way, the case 40 protects each part of the ventilator main body 50.

[0044] <Base body> Fig. 5 is a perspective view of the base body 60 as seen obliquely from the rear. Fig. 6 is an exploded view of the base body 60. As shown in Fig. 6, the base main body 60 has a first member 61 and a second member 62 that are assembled together in the front-rear direction X. That is, in this embodiment, the front-rear direction X corresponds to the "assembly direction." An air passage 60F is provided inside the base main body 60. The air passage 60F is mainly formed between the first member 61 and the second member 62.

[0045] The first member 61 constitutes the rear side (i.e., the wall 9 side (-X direction)) of the base main body 60. On the other hand, the second member 62 constitutes the front side of the base main body 60. The second member 62 supports the ventilation fan 51.

[0046] 5, the base main body 60 has a box-shaped portion 63 that is rectangular when viewed from the rear, and a pipe portion 64 that is shaped like a pipe and is disposed to the right (-Y direction) of the box-shaped portion 63. The box-shaped portion 63 and the pipe portion 64 are formed by assembling a first member 61 and a second member 62 in the front and rear, respectively. Furthermore, the various portions of the air passage 60F are disposed inside the box-shaped portion 63 and the pipe portion 64, respectively.

[0047] The pipe portion 64 protrudes to the right (-Y direction) from the side surface of the box-shaped portion 63 and further extends upward. The internal space of the pipe portion 64 forms the upstream region of the air passage 60F. The ventilation piping 31 is connected to the pipe portion 64. The connection portion between the pipe portion 64 and the ventilation piping 31 is covered by a cylindrical joint member 75 shown in FIG. 4. The joint member 75 protects the connection portion between the pipe portion 64 and the ventilation piping 31.

[0048] 6, the first member 61 has a first opposing surface 61b facing forward (+X direction), and the second member 62 has a second opposing surface 62b facing backward (-X direction). When the first member 61 and the second member 62 are assembled, the first opposing surface 61b and the second opposing surface 62b face each other and come into contact with each other. The first member 61 and the second member 62 are fastened together with screws in the front-rear direction X, and are fixed to each other with surface pressure being applied to the first opposing surface 61b and the second opposing surface 62b.

[0049] The first opposing surface 61b has an upper region 61s, a lower region 61t, and a connection region 61u. The upper region 61s and the lower region 61t are flat surfaces perpendicular to the front-rear direction X. The upper region 61s is located higher than the lower region 61t. The upper region 61s protrudes forward relative to the lower region 61t. The connection region 61u is located between the upper region 61s and the lower region 61t in the vertical direction Z and connects the upper region 61s and the lower region 61t. The connection region 61u is a flat surface that slopes downward toward the rear (-X direction).

[0050] Like the first opposing surface 61b, the second opposing surface 62b has an upper region 62s, a lower region 62t, and a connection region 62u. The upper region 62s and the lower region 62t are flat surfaces perpendicular to the front-rear direction X. The upper region 62s is located higher than the lower region 62t. The lower region 62t protrudes rearward relative to the upper region 62s. The connection region 62u is located between the upper region 62s and the lower region 62t in the vertical direction Z and connects the upper region 62s and the lower region 62t. The connection region 62u is a flat surface that slopes downward toward the rear (-X direction). The upper region 62s of the second opposing surface 62b contacts the upper region 61s of the first opposing surface 61b. The lower region 62t of the second opposing surface 62b contacts the lower region 61t of the first opposing surface 61b. The connection region 62u of the second opposing surface 62b contacts the connection region 62u of the first opposing surface 61b.

[0051] 7 is a front view of the first member 61 as viewed from the front. As shown in FIG. 7, a first recess (recess) 61c and a protrusion 65 are provided on the first opposing surface 61b of the first member 61. The first recess 61c is recessed rearward (in the -X direction) from the first opposing surface 61b. The first recess 61c is formed in a U-shape from the pipe portion 64 to the box-shaped portion 63. The protrusion 65 protrudes forward (in the +X direction) from the first opposing surface 61b.

[0052] FIG. 8 is a rear view of the second member 62 as viewed from the rear. As shown in FIG. 8, a second recess (recess) 62c, an opening 62a, a groove 66, and a storage recess 67 are provided in the second opposing surface 62b of the second member 62. The second recess 62c is recessed forward (in the +X direction) from the second opposing surface 62b. The second recess 62c is formed in a U-shape from the pipe portion 64 to the box-shaped portion 63. The opening 62a penetrates from the bottom surface of the second recess 62c forward (in the +X direction). The opening 62a is circular when viewed from the front-rear direction X. The groove 66 and the storage recess 67 are recessed forward (in the +X direction) from the second opposing surface 62b. The storage recess 67 is located at the end of the groove 66. The storage recess 67 functions in a modified example described below, which will be described later with reference to FIG. 12.

[0053] When the first member 61 and the second member 62 are assembled, the first recess 61c and the second recess 62c overlap each other when viewed from the front-rear direction X to form air passage 60F. That is, the first recess 61c is covered by the second opposing surface 62b to form part of air passage 60F, and the second recess 62c is covered by the first opposing surface 61b to form part of air passage 60F.

[0054] In the present embodiment, the case has been described in which first recess 61c and second recess 62c overlap each other to form one air passage 60F. However, air passage 60F may be configured such that first recess 61c is covered by flat second opposing surface 62b, or such that second recess 62c is covered by flat first opposing surface 61b. That is, it is sufficient that at least one of first opposing surface 61b and second opposing surface 62b has a recess (first recess 61c or second recess 62c) that is covered by the other to form air passage 60F.

[0055] As described above, first recess 61c and second recess 62c are formed in a U-shape when viewed from the front-rear direction X. Therefore, air passage 60F is formed in a U-shape when viewed from the front-rear direction X. As shown in FIGS. 7 and 8, air passage 60F has inlet portion 60p, upstream region 60a, turning region 60c, downstream region 60b, forward bent portion 60q, and opening 62a (see FIG. 8).

[0056] The inlet section 60p is located at the upper end of the pipe section 64. Since the ventilation pipe 31 is connected to the upper end of the pipe section 64, air flows into the inlet section 60p from the ventilation pipe 31. The upstream region 60a extends downward from the inlet section 60p. The turn-back region 60c extends in the left-right direction Y. The turn-back region 60c connects the lower end of the upstream region 60a to the lower end of the downstream region 60b. The right end (-Y direction) of the turn-back region 60c is connected to the upstream region 60a. The left end (+Y direction) of the turn-back region 60c is connected to the downstream region 60b. The downstream region 60b extends upward from the turn-back region 60c. A forward bend portion 60q is provided at the upper end of the downstream region 60b. The forward bend portion 60q bends forward (+X direction). An opening 62a is provided in front of the forward bent portion 60q. The opening 62a opens forward.

[0057] The inlet section 60p, the upstream region 60a, the turning region 60c, and the downstream region 60b are provided in the recesses 61c and 62c of the lower regions 61t and 62t. Meanwhile, the forward bent portion 60q is provided in the recesses 61c and 62c of the upper regions 61s and 62s and the connection regions 61u and 62u. As described above, the upper regions 61s and 62s and the connection regions 61u and 62u are located forward (in the +X direction) of the lower regions 61t and 62t. According to this embodiment, the forward bent portion 60q can be disposed forward of the upstream region 60a, the turning region 60c, and the downstream region 60b. As a result, an air passage 60F that bends gently forward can be formed at the forward bent portion 60q.

[0058] Air flowing into air passage 60F from inlet section 60p flows downward (in the -Z direction) in upstream region 60a. This air changes direction to the left (in the +Y direction) and upward (in the +Z direction) in turning region 60c. Furthermore, this air flows upward (in the +Z direction) in downstream region 60b. Air reaching the upper end of downstream region 60b changes direction to the front (in the +X direction) at forward bend section 60q and is blown forward from opening 62a. Ventilation fan 51 (see FIG. 4) is connected to opening 62a. Air passage 60F thereby connects ventilation pipe 31 and ventilation fan 51. Stator vanes 62f that straighten the air passing through opening 62a are provided in opening 62a.

[0059] As shown in Fig. 7, the ridges 65 are formed by bending within the plane of the first opposing surface 61b. When viewed from the normal direction of the first opposing surface 61b, the ridges 65 extend in a generally G-shape. The ridges 65 have a first ridge section 65a, a second ridge section 65b, a third ridge section 65c, a fourth ridge section 65d, and a fifth ridge section 65e. The ridges 65 are a series of ribs that are connected in the order of the first ridge section 65a, the second ridge section 65b, the third ridge section 65c, the fourth ridge section 65d, and the fifth ridge section 65e.

[0060] The first ridge section 65a is located to the right (-Y direction) of the upstream region 60a of the air passage 60F and extends in the vertical direction Z along the upstream region 60a. The second ridge section 65b is located below the turning region 60c of the air passage 60F (-Z direction) and extends in the left-right direction Y along the turning region 60c. The third ridge section 65c is located to the left (+Y direction) of the upstream region 60a and the forward bend 60q of the air passage 60F and extends in the vertical direction Z along the upstream region 60a and the forward bend 60q. The fourth ridge section 65d is located above the forward bend 60q (+Z direction) and extends in the left-right direction Y. The fifth ridge section 65e extends in the vertical direction Z between the forward bend 60q and the upstream region 60a. The first ridge section 65a and the fifth ridge section 65e are arranged on both sides of the upstream region 60a of the air passage 60F in the left-right direction Y. In this manner, the ridges 65 are arranged within the first opposing surface 61b so as to surround each portion of the first recess 61c. Therefore, the ridges 65 surround the air passage 60F when viewed from the front-rear direction X.

[0061] 8, the groove 66 is formed by bending within the plane of the second opposing surface 62b. The groove 66 extends in a substantially G-shape when viewed from the normal direction of the second opposing surface 62b. The groove 66 has a first groove section 66a, a second groove section 66b, a third groove section 66c, a fourth groove section 66d, and a fifth groove section 66e. The first groove section 66a, the second groove section 66b, the third groove section 66c, the fourth groove section 66d, and the fifth groove section 66e are connected in this order to form a continuous groove.

[0062] The first groove section 66a is located to the right (-Y direction) of the upstream region 60a of the air passage 60F and extends in the vertical direction Z along the upstream region 60a. The second groove section 66b is located below the turning region 60c of the air passage 60F (-Z direction) and extends in the left-right direction Y along the turning region 60c. The third groove section 66c is located to the left (+Y direction) of the upstream region 60a and the forward bend 60q of the air passage 60F and extends in the vertical direction Z along the upstream region 60a and the forward bend 60q. The fourth groove section 66d is located above the forward bend 60q (+Z direction) and extends in the left-right direction Y. The fifth groove section 66e extends in the vertical direction Z between the forward bend 60q and the upstream region 60a. The first groove section 66a and the fifth groove section 66e are disposed on both sides of the upstream region 60a of the air passage 60F in the left-right direction Y. In this manner, the grooves 66 are disposed within the plane of the second opposing surface 62b so as to surround each portion of the second recess 62c. Therefore, the grooves 66 surround the air passage 60F when viewed from the front-rear direction X.

[0063] When the first member 61 and the second member 62 are assembled together, the grooves 66 accommodate the protrusions 65. The first groove section 66a of the grooves 66 accommodates the first protrusion section 65a of the protrusions 65, the second groove section 66b of the grooves 66 accommodates the second protrusion section 65b of the protrusions 65, the third groove section 66c of the grooves 66 accommodates the third protrusion section 65c of the protrusions 65, the fourth groove section 66d of the grooves 66 accommodates the fourth protrusion section 65d of the protrusions 65, and the fifth groove section 66e of the grooves 66 accommodates the fifth protrusion section 65e of the protrusions 65.

[0064] Fig. 9 is a partial cross-sectional view of the base body 60 taken along line IX-IX in Fig. 5, and Fig. 10 is a partial cross-sectional view of the base body 60 taken along line XX in Fig. 5. Note that Fig. 9 is a cross-sectional view of the first ridge section 65a of the ridge portion 65 and the first groove section 66a of the groove portion 66, and Fig. 10 is a cross-sectional view of the third ridge section 65c of the ridge portion 65 and the third groove section 66c of the groove portion 66.

[0065] In the following description, when the second opposing surface 62b is viewed from the front, the direction in which each section of the groove portion 66 extends is referred to as the longitudinal direction of that section. Furthermore, when the second opposing surface 62b is viewed from the front, the direction perpendicular to the longitudinal direction in each section of the groove portion 66 is referred to as the width direction D, and the dimension of the width direction D is referred to as the width dimension.

[0066] 9 and 10, a sealing portion 3 is disposed in the groove portion 66. That is, the base body 60 has the sealing portion 3 disposed between the first member 61 and the second member 62. In this embodiment, the sealing portion 3 is an adhesive sealant that is filled in the groove portion 66 in an uncured state and cured after the first member 61 and the second member 62 are assembled.

[0067] The groove portion 66 has a first groove 1 and a second groove 2 provided on the bottom surface (first bottom surface 1c) of the first groove 1. The first groove 1 and the second groove 2 are provided over the entire length of the groove portion 66. The depths of the first groove 1 and the second groove 2 are uniform over the entire length of the groove portion 66. In addition, the protruding height of the protruding portion 65 inserted into the groove portion 66 is also uniform over the entire length of the protruding portion 65.

[0068] The first groove 1 is recessed forward (in the +X direction) relative to the second opposing surface 62b. The first groove 1 has a first bottom surface 1c and a pair of first side surfaces 1d. The first bottom surface 1c faces rearward (in the -X direction). Therefore, the first bottom surface 1c faces the first opposing surface 61b in the front-rear direction X. The pair of first side surfaces 1d face each other in the width direction D of the groove portion 66. The pair of first side surfaces 1d extend rearward from both ends of the first bottom surface 1c in the width direction D and connect to the second opposing surface 62b.

[0069] The first bottom surface 1c has a first region 1A and a second region 1B. The first region 1A is located on the air passage 60F side of the second groove 2. On the other hand, the second region 1B is located on the opposite side of the air passage 60F of the second groove 2. The first region 1A and the second region 1B are arranged on the same plane. A first gap G1 is formed between the first region 1A and the first opposing surface 61b. Similarly, a second gap G2 is formed between the second region 1B and the first opposing surface 61b. The gap heights of the first gap G1 and the second gap G2 are equal to each other.

[0070] The second groove 2 is recessed forward (in the +X direction) relative to the first bottom surface 1c. The second groove 2 has a second bottom surface 2c and a pair of second side surfaces 2d. The second bottom surface 2c faces rearward (in the -X direction). Therefore, the second bottom surface 2c faces the first opposing surface 61b in the front-rear direction X. The pair of second side surfaces 2d face each other in the width direction D of the groove portion 66. The pair of second side surfaces 2d extend rearward from both ends of the second bottom surface 2c in the width direction D and connect to the first bottom surface 1c.

[0071] The protrusion 65 protrudes forward (in the +X direction) from the first opposing surface 61b. The protrusion 65 has a tip surface 65t and a pair of side surfaces 65s. The tip surface 65t faces the second bottom surface 2c in the front-rear direction X. The tip surface 65t is located forward (in the +X direction) of the first bottom surface 1c. Therefore, the tip of the protrusion 65 is disposed inside the second groove 2. The pair of side surfaces 65s face the first side surface 1d and the second side surface 2d in the width direction D of the groove 66.

[0072] The sealing portion 3 is filled into the second groove 2. The sealing portion 3 contacts the protrusion 65 inside the second groove 2. The sealing portion 3 contacts and adheres to the inner surface of the second groove 2 and the outer surface of the protrusion 65. More specifically, the sealing portion 3 contacts and adheres to the second bottom surface 2c and the pair of second side surfaces 2d of the second groove 2, as well as the tip surface 65t and the pair of side surfaces 65s of the protrusion 65. The sealing portion 3 also contacts a part of the first opposing surface 61b and a part of the first bottom surface 1c.

[0073] The sealing portion 3 is filled in an uncured state into the second groove 2 of the groove portion 66. When the sealing portion 3 is filled, the opening of the groove portion 66 is directed upward. The first member 61 and the second member 62 are assembled with the uncured sealing portion 3 filled in the groove portion 66. When the first member 61 and the second member 62 are assembled, the protrusion portion 65 enters the inside of the groove portion 66. The protrusion portion 65 comes into contact with the uncured sealing portion 3 in the second groove 2, causing the uncured sealing portion 3 to overflow from the groove portion 66. Furthermore, the uncured sealing portion 3 enters the gaps G1 and G2 between the first opposing surface 61b and the first bottom surface 1c. The sealing portion 3 hardens in this state and adheres to the inner surface of the groove portion 66 and the outer surface of the protrusion portion 65.

[0074] The amount of uncured sealing portion 3 filled is, for example, such that the sealing portion 3 completely fills the second groove 2 without spreading to the first bottom surface 1c of the first groove 1. It is difficult to precisely control the amount of uncured sealing portion 3 filled, even when using a dedicated dispenser. That is, the amount of sealing portion 3 filled may vary from one longitudinal portion of the groove 66 to another and from one product to another. Therefore, it is expected that the amount of uncured sealing portion 3 overflowing from the second groove 2 as the protrusion 65 enters the second groove 2 will also vary from one longitudinal portion of the groove 66 to another and from one product to another.

[0075] In this embodiment, gaps G1 and G2 are provided on both sides of the second groove 2 in the width direction D, where the uncured sealing portions 3 are filled, to accommodate the overflowing uncured sealing portions 3. This prevents the sealant constituting the sealing portions 3 from leaking out of the groove 66. If the sealant leaks from the groove 66 and enters the air passage 60F, it may disrupt the airflow within the air passage 60F and increase the ventilation resistance within the air passage 60F. Furthermore, if the sealant leaks from the groove 66 to the opposite side of the air passage 60F, not only will the appearance of the base body 60 deteriorate, but the leaked uncured sealant may adhere to other components and contaminate their surfaces. According to this embodiment, even if there is variation in the amount of uncured sealing portions 3 filled into the groove 66, leakage of the sealing portions 3 from the groove 66 can be prevented, thereby preventing an increase in air passage resistance and a deterioration in the appearance of the ventilation device 30 due to the leakage of the sealing portions 3.

[0076] As shown in FIG. 5, the pipe portion 64 is provided with a rib 64r that protrudes to the right (-Y direction) and extends in the vertical direction Z. The first protrusion section 65a and the first groove section 66a shown in FIG. 9 extend in the vertical direction Z within the rib 64r and are combined in the front-rear direction X. If the protruding height of the rib 64r is made too high, it becomes difficult to maintain dimensional accuracy and ensure close contact between the first opposing surface 61b and the second opposing surface 62b within the rib 64r. Furthermore, if the protruding height of the rib 64r is made too high, the dimension of the rib 64r in the left-right direction Y of the base main body 60 increases. Therefore, there is a limit to the protruding height of the rib 64r, and it is difficult to increase the width of the groove portion 66 in the first groove section 66a compared to the other sections.

[0077] As shown in FIG. 9 , in the first groove section 66a of the groove portion 66, the width dimension W1 of the first region 1A is larger than the width dimension W2 of the second region 1B (W1>W2). In this embodiment, the width dimension W1 of the first region 1A is more than twice the width dimension W2 of the second region 1B. Therefore, in the first groove section 66a, the volume of the first gap G1 is larger than the volume of the second gap G2. The first gap G1 can retain a larger amount of sealant overflowing from the second groove 2 than the second gap G2. The first gap G1 is disposed closer to the air passage 60F than the second groove 2. According to this embodiment, the first gap G1, which has a larger volume, can retain uncured sealant 3 that overflows from the second groove 2 and flows toward the air passage 60F. This reliably prevents the sealant from entering the air passage 60F. In the groove 66 of this embodiment, the width W1 of the first region 1A and the width W2 of the second region 1B are equal to each other in the sections other than the first groove section 66a. However, in the groove 66, the widths W1, W2 of the first region 1A and the second region 1B may have the above-mentioned relationship in all sections.

[0078] In the present embodiment, the second groove 2 is provided in the middle of the first bottom surface 1c in the width direction D, thereby dividing the first bottom surface 1c into a first region 1A and a second region 1B. By providing the first region 1A and the second region 1B on both sides of the second groove 2 in the width direction D, uncured sealant that overflows from the second groove 2 to both sides in the width direction D can be contained in the gaps G1 and G2 on both sides in the width direction D, effectively suppressing leakage of the sealant from the groove portion 66. However, the groove portion 66 may be configured so that only the first region 1A or only the second region 1B is formed by disposing the second groove 2 biased toward either end of the first bottom surface 1c in the width direction D. In this case, by ensuring a sufficiently large width dimension of either the first region 1A or the second region 1B, leakage of the sealant from the groove portion 66 can be suppressed.

[0079] <Modification> Fig. 11 is a cross-sectional view of a base body 60 having a modified sealing portion 103 that can be employed in the above-described embodiment. Fig. 11 is a cross-sectional view of a portion corresponding to Fig. 10 in the above-described embodiment. The base body 60 of this modified embodiment has a first member 61 and a second member 62 similar to those in the above-described embodiment, and only the configuration of the sealing portion 103 is different. Note that the same components as those in the above-described embodiment are given the same reference numerals, and their description will be omitted.

[0080] The sealing portion 103 of this modified example is a porous elastic member. In other words, the sealing portion 103 is sponge-like. The sealing portion 103 is disposed between the first member 61 and the second member 62. Before compression, the sealing portion 103 is strip-shaped with a uniform rectangular cross section extending in one direction. The sealing portion 103 is disposed in the groove portion 66 with the long side of the rectangular cross section aligned with the width direction D of the groove portion 66. The sealing portion 103 is compressed while being sandwiched between the first member and the second member 62 inside the groove portion 66.

[0081] The thickness of the sealing portion 103 in the front-rear direction X before compression is preferably greater than the depth of the groove portion 66. In this case, the sealing portion 103 can be sufficiently compressed within the groove portion 66, thereby ensuring sufficient sealing performance of the sealing portion 103. The depth of the groove portion 66 is the distance in the front-rear direction X between the second opposing surface 62b and the second bottom surface 2c of the second groove 2.

[0082] The sealing portion 103 is a portion formed by bending the groove portion 66, such as the boundary portion of the groove section, and is bent to fit the shape of the groove portion 66 and placed inside the groove portion 66. In this modified example, a case will be described in which a continuous strip-shaped sealing portion 103 is placed in the groove portion 66. However, a configuration may also be used in which a plurality of sealing portions 103 are prepared to match the lengths of the groove sections 66a, 66b, 66c, 66d, and 66e and these are housed in the respective groove sections.

[0083] 11, the sealing portion 103 has a bent portion 103c, and a first compressed portion 103a and a second compressed portion 103b arranged on both sides of the bent portion 103c in the width direction D. The bent portion 103c, the first compressed portion 103a, and the second compressed portion 103b are provided over the entire length of the sealing portion 103 in the longitudinal direction.

[0084] The first compression portion 103a is sandwiched and compressed between the first region 1A of the first bottom surface 1c and the first opposing surface 61b at the first gap G1. Similarly, the second compression portion 103b is sandwiched and compressed in the front-rear direction X between the second region 1B of the first bottom surface 1c and the first opposing surface 61b at the second gap G2.

[0085] The bent portion 103c is pressed into the second groove 2 by the protrusion 65. Therefore, the bent portion 103c comes into contact with the protrusion 65 inside the second groove 2. The bent portion 103c also comes into contact with the second bottom surface 2c of the second groove 2. The bent portion 103c is compressed in the front-rear direction X between the tip surface 65t of the protrusion 65 and the second bottom surface 2c. The bent portion 103c is bent in the front-rear direction X between the outer surface of the protrusion 65 and the inner surface of the second groove 2.

[0086] The gap dimension in the front-to-rear direction X between the first bottom surface 1c and the first opposing surface 61b is smaller than the gap dimension between the tip surface 65t of the protrusion portion 65 and the second bottom surface 2c. Therefore, in a state in which the first member 61 and the second member 62 are assembled, the compression ratios in the front-to-rear direction X of the first compression portion 103a and the second compression portion 103b are higher than the compression ratio of the bent portion 103c.

[0087] FIG. 12 is an enlarged front view of the receiving recess 67 and the sealing portion 103 received in the receiving recess 67 in the region XII of FIG. The accommodating recess 67 is connected to an end of the groove 66 in the longitudinal direction. The accommodating recess 67 is connected to a fifth groove section 66e of the groove 66. The accommodating recess 67 extends to at least one side in the width direction D with respect to the groove 66. A bottom surface 67c of the accommodating recess 67 is continuous with the first bottom surface 1c of the first groove 1.

[0088] In this modified example, the worker assembling the base body 60 fits the sealing portion 103 into the groove 66 from the rear (-X side) while applying tension to the sealing portion 103 in the longitudinal direction. Therefore, the sealing portion 103 stretches in the longitudinal direction during the assembly process and becomes longer than the overall length of the groove 66. An excess portion 103g that does not fit into the groove 66 is generated at the longitudinal end of the sealing portion 103. The fitting recess 67 is provided to fit the excess portion 103g of the sealing portion 103. The excess portion 103g is fitted into the fitting recess 67 in a spirally folded state. This modified example simplifies the assembly process compared to when the excess portion 103g is removed.

[0089] <Summary> The air conditioner 100 of this embodiment and its modified examples includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, and a ventilation device 30. The indoor unit 20 is installed inside the room 8 and has a heat exchanger (first heat exchanger) 22. The outdoor unit 10 is installed outside the room 7 and has a heat exchanger (second heat exchanger) 13. The circulation path section 18 passes through a through-hole 9h in a wall 9 separating the room 8 from the outside 7, connecting the heat exchanger 22 of the indoor unit 20 to the heat exchanger 13 of the outdoor unit 10. The ventilation device 30 ventilates the air in the room 8. The ventilation device 30 includes a ventilation pipe 31, a base main body 60, and a ventilation fan 51. The ventilation pipe 31 passes through the through-hole 9h from the room 8 to the outside 7. The base main body 60 is connected to the ventilation pipe 31 at the outside 7. The ventilation fan 51 is supported by a base body 60. An air passage 60F connecting the ventilation pipe 31 and the ventilation fan 51 is provided inside the base body 60. The base body 60 has a first member 61 and a second member 62 that are assembled together in an assembly direction (front-rear direction X), and sealing portions 3, 103 that are arranged between the first member 61 and the second member 62. The first member 61 has a first opposing surface 61b that faces the assembly direction (front-rear direction X). The second member 62 has a second opposing surface 62b that faces the first opposing surface 61b. At least one of the first opposing surface 61b and the second opposing surface 62b is provided with recesses 61c, 62c that are covered by the other to form the air passage 60F. A protrusion 65 is provided on the first opposing surface 61b. The protrusion 65 surrounds the air passage 60F when viewed from the assembly direction (front-rear direction X). The protrusion 65 protrudes toward the second opposing surface 62b. A groove 66 is provided in the second opposing surface 62b. The groove 66 accommodates the protrusion 65. The groove 66 has a first groove 1 and a second groove 2 provided in the first bottom surface 1c of the first groove 1. The tip of the protrusion 65 is disposed inside the second groove 2. The sealing portions 3, 103 contact at least the protrusion 65 inside the second groove 2.

[0090] In the above-described configuration, air is drawn toward the ventilation fan 51, resulting in a lower pressure inside the air passage 60F compared to the space outside the base body 60. This may result in air being drawn toward the air passage 60F at the boundary between the first member 61 and the second member 62. Air being drawn at the boundary may reduce the exhaust efficiency of the ventilation fan 51. According to the above-described configuration, the groove 66 and the protrusion 65 inserted into the groove 66 are provided at the boundary between the first member 61 and the second member 62. This allows a labyrinth structure that bends in the front-to-rear direction X to be formed at the boundary between the first member 61 and the second member 62. This prevents air from being drawn into the air passage 60F at the boundary, thereby improving the airtightness of the air passage 60F. Furthermore, according to the above-described configuration, the sealing portion 3, 103 that contacts the protrusion 65 is disposed between the second groove 2 and the protrusion 65, which form the labyrinth structure. Therefore, the flow of air attempting to pass through second groove 2 can be blocked by sealing portions 3 and 103. As a result, it is possible to suppress the intake of air from the external space into air passage 60F.

[0091] Furthermore, according to the above-described configuration, gaps G1 and G2 are provided between the first bottom surface 1c of the first groove 1 and the first opposing surface 61b. When an adhesive sealant is used as the sealing portion 3, the gaps G1 and G2 can be used as spaces to retain uncured sealant that overflows from the second groove 2. Furthermore, when a porous elastic material is used as the sealing portion 103, the gaps G1 and G2 can be used as areas that strongly compress the sealing portion 103. As such, the gaps G1 and G2 in this embodiment and the modified examples are effective for sealing portions 3 and 103 with different configurations. In other words, the structure according to the above-described configuration is highly versatile, and by selecting the optimal sealing portion 3 and 103 depending on the outdoor environment in which the ventilation device 30 is installed, the ventilation device 30 can be adapted to the environment and manufactured inexpensively.

[0092] The sealing portion 3 of this embodiment is a sealant that fills the second groove 2 and adheres to the inner surface of the second groove 2 and the protrusion 65. With this configuration, the sealing portion 3 can seal the gap between the first member 61 and the second member 62, thereby preventing air from being drawn into the air passage 60F at the boundary between the first member 61 and the second member 62. Furthermore, the gaps G1 and G2 between the first bottom surface 1c of the first groove 1 and the first opposing surface 61b can prevent uncured sealant from leaking out. This prevents an increase in air passage resistance and a deterioration in the appearance of the ventilation device 30 due to sealant leakage.

[0093] In this embodiment, the first bottom surface 1c of the first groove 1 has a first region 1A and a second region 1B. The first region 1A is located closer to the air passage 60F than the second groove 2 in the width direction D of the groove portion 66. The second region 1B is located on the opposite side of the air passage 60F than the second groove 2 in the width direction D of the groove portion 66. The first region 1A has a larger dimension in the width direction D than the second region 1B. This configuration ensures that the first gap G1 between the first region 1A and the first opposing surface 61b is larger than the second gap G2 between the second region 1B and the first opposing surface 61b. This makes it possible to sufficiently retain uncured sealant that attempts to leak toward the air passage 60F in the first gap G1, thereby more reliably preventing the sealant from entering the invisible air passage 60F.

[0094] 11 is a porous elastic member, and is compressed by the ridges 65 within the grooves 66. With this configuration, the sealing member 103 compressed by the ridges 65 can effectively seal the path from the external space of the base body 60 to the air passage 60F. Furthermore, with this configuration, the use of the elastic sealing member 103 does not require as much time for hardening as compared to when an adhesive sealant is used, and the time required for the assembly process of the base body 60 can be shortened.

[0095] In the above-described modified example, the first bottom surface 1c of the first groove 1 has a first region 1A and a second region 1B. The first region 1A is located on one side of the second groove 2 in the width direction D of the groove portion 66. The second region 1B is located on the other side of the second groove 2 in the width direction D of the groove portion 66. The sealing portion 103 has a first compressed portion 103a, a second compressed portion 103b, and a bent portion 103c. The first compressed portion 103a is sandwiched between the first region 1A and the first opposing surface 61b. The second compressed portion 103b is sandwiched between the second region 1B and the first opposing surface 61b. The bent portion 103c is bent while being sandwiched between the outer surface of the protrusion portion 65 and the inner surface of the second groove 2. According to this configuration, the space between the second groove 2 and the protrusion 65 can be filled with the bent portion 103c bent in the front-rear direction X (assembly direction), effectively sealing the path from the external space of the base main body 60 to the air passage 60F. Furthermore, the first compression portion 103a and the second compression portion 103b are likely to be strongly compressed in the assembly direction (front-rear direction X), thereby improving the airtightness of the air passage 60F.

[0096] 12, in the above-described modified example, the second opposing surface 62b is provided with an accommodating recess 67 that is connected to an end of the groove 66 in the longitudinal direction and extends to one side of the groove 66 in the width direction D of the groove 66. The end of the sealing portion 103 is accommodated in the accommodating recess 67. According to this configuration, the surplus portion 103g of the end of the sealing portion 103 can be accommodated in the accommodating recess 67. Therefore, it is not necessary to cut off the surplus portion 103g in the assembly process, which simplifies the assembly work.

[0097] Although the embodiments and their modifications of the present disclosure have been described above, the present disclosure is not limited to the configurations of the above-described embodiments. For example, in the above-described embodiment and its variants, the first member 61 is positioned at the rear and the second member 62 is positioned at the front, but the positions of the first member 61 and the second member in the fore-and-aft direction are not limited. In the above embodiment, the case where the assembly direction of the second member 62 to the first member 61 coincides with the front-rear direction X has been described. However, the assembly direction may also coincide with other directions such as the left-right direction Y or the vertical direction Z. Although the protrusion portion 65 and groove portion 66 in the above-described embodiment and its modified example have been described as not forming a closed loop shape when viewed from the assembly direction (front-rear direction X), they may each form a closed loop. [Explanation of symbols]

[0098] 1...first groove, 1c...first bottom surface (bottom surface), 1A...first region, 1B...second region, 2...second groove, 3, 103...sealing portion, 7...outdoor, 8...indoor, 9...wall, 9h...through hole, 10...outdoor unit, 13...heat exchanger (second heat exchanger), 18...circulation path portion (refrigerant piping), 19...refrigerant, 20...indoor unit, 22...heat exchanger (first heat exchanger), 30...ventilation device, 31...ventilation piping, 51...ventilation fan, 60...base Main body, 60F...air passage, 61...first member, 61b...first opposing surface, 61c...first recess (recess), 62...second member, 62b...second opposing surface, 62c...second recess (recess), 65...protrusion, 65s...side surface, 65t...tip surface, 66...groove, 67...accommodating recess, 67c...bottom surface, 80...base, 100...air conditioner, 103a...first compression section, 103b...second compression section, 103c...bent section, D...width direction

Claims

1. an indoor unit installed indoors and having a first heat exchanger; an outdoor unit installed outdoors and having a second heat exchanger; a refrigerant pipe that passes through a through-hole in a wall that separates the indoor space from the outdoor space and connects the first heat exchanger and the second heat exchanger; a ventilation device that ventilates the air in the room, The ventilation device includes: a ventilation pipe extending from the room through the through hole to the outside of the room; a base body connected to the ventilation pipe outside the room; a ventilation fan supported by the base body, An air passage connecting the ventilation pipe and the ventilation fan is provided inside the base body, The base body includes: a first member and a second member that are assembled to each other in an assembly direction; a sealing portion disposed between the first member and the second member, the first member has a first opposing surface facing the assembly direction, the second member has a second opposing surface opposing the first opposing surface, a recessed portion is provided in at least one of the first opposing surface and the second opposing surface, the recessed portion being covered by the other surface to form the air passage; a protrusion portion that surrounds the air passage when viewed from the assembly direction and protrudes toward the second opposing surface is provided on the first opposing surface; The second opposing surface is provided with a groove portion in which the protrusion portion is accommodated, the groove portion has a first groove and a second groove provided on a bottom surface of the first groove, a tip of the protrusion is disposed inside the second groove, the sealing portion contacts at least the protrusion portion inside the second groove, the sealing portion is a sealant filled in the second groove and adhered to the inner surface of the second groove and the protrusion portion, The bottom surface of the first groove is a first region located on the air passage side of the second groove in a width direction of the groove portion; a second region located on the opposite side of the air passage with respect to the second groove in the width direction, The first region has a larger dimension in the width direction than the second region. Air conditioner.

2. An indoor unit installed indoors and having a first heat exchanger; an outdoor unit installed outdoors and having a second heat exchanger; a refrigerant pipe that passes through a through-hole in a wall that separates the indoor space from the outdoor space and connects the first heat exchanger and the second heat exchanger; a ventilation device that ventilates the air in the room, The ventilation device includes: a ventilation pipe extending from the room through the through hole to the outside of the room; a base body connected to the ventilation pipe outside the room; a ventilation fan supported by the base body, An air passage connecting the ventilation pipe and the ventilation fan is provided inside the base body, The base body includes: a first member and a second member that are assembled to each other in an assembly direction; a sealing portion disposed between the first member and the second member, the first member has a first opposing surface facing the assembly direction, the second member has a second opposing surface opposing the first opposing surface, a recessed portion is provided in at least one of the first opposing surface and the second opposing surface, the recessed portion being covered by the other surface to form the air passage; a protrusion portion that surrounds the air passage when viewed from the assembly direction and protrudes toward the second opposing surface is provided on the first opposing surface; The second opposing surface is provided with a groove portion in which the protrusion portion is accommodated, the groove portion has a first groove and a second groove provided on a bottom surface of the first groove, a tip of the protrusion is disposed inside the second groove, the sealing portion contacts at least the protrusion portion inside the second groove, the sealing portion is a porous elastic member, and is compressed by the protrusion portion within the groove portion; The bottom surface of the first groove is a first region located on one side of the second groove in the width direction of the groove portion; a second region located on the other side of the second groove in the width direction, The sealing portion is a first compression portion sandwiched between the first region and the first opposing surface; a second compression portion sandwiched between the second region and the first opposing surface; a bending portion that is bent while being sandwiched between an outer surface of the protrusion portion and an inner surface of the second groove, Air conditioner.

3. The second opposing surface is provided with an accommodating recess that is connected to an end of the groove in the longitudinal direction and extends toward one side of the groove in the width direction with respect to the groove, The end of the sealing portion is accommodated in the accommodation recess. The air conditioner according to claim 2.

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