Air conditioner

Abstract

An air conditioner provided with: an indoor unit that is installed on an indoor wall surface and that has a first heat exchanger, and a housing that accommodates the first heat exchanger; an outdoor unit that is installed outdoors and that has a second heat exchanger; a refrigerant pipe that passes through a through hole in a wall separating the interior and the exterior and that connects the first heat exchanger and the second heat exchanger; and a ventilation device that ventilates air in the room. The ventilation device includes: an intake part that is provided on the lower surface of the housing and takes in the indoor air; a ventilation fan that is disposed outdoors; and a ventilation pipe passing through the through hole and connecting the intake part and the ventilation fan. The intake part includes: a joint part having an opening part opening into the indoors and connected to a tip of the ventilation pipe; a filter part covering the opening part; and an air-permeable cover covering the filter part. The cover is detachably fixed to the joint part, and the filter part is detachably fixed to the cover.

Description

air conditioner

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

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

[0003] Patent No. 4381048

[0004] In conventional ventilation units, filters are installed in the piping, making it impossible to replace or clean the filters. For this reason, there is a demand for air conditioners equipped with ventilation devices that allow the filters to be easily removed.

[0005] In view of the above circumstances, the present disclosure aims to provide an air conditioner in which the filter section can be easily removed.

[0006] One aspect of an air conditioner according to the present disclosure comprises an indoor unit installed on a wall surface inside a room and having a first heat exchanger and a housing that houses the first heat exchanger; an outdoor unit installed outside the room and having a second heat exchanger; refrigerant piping that passes through a through-hole in the wall separating the room from the outside and connects the first heat exchanger and the second heat exchanger; and a ventilation device that ventilates the air inside the room, wherein the ventilation device has an intake section that is provided on the underside of the housing and draws in air from the room, a ventilation fan that is located outside the room, and ventilation piping that passes through the through-hole and connects the intake section and the ventilation fan, wherein the intake section has a joint section that has an opening that opens into the room and is connected to the tip of the ventilation piping, a filter section that covers the opening, and a breathable cover that covers the filter section, wherein the cover is removably fixed to the joint section, and the filter section is removably fixed to the cover.

[0007] According to the present disclosure, it is possible to provide an air conditioner in which the filter section can be easily removed.

[0008] FIG. 1 is a schematic diagram showing a schematic configuration of an air conditioner according to an embodiment. FIG. 1 is a schematic diagram showing the installation state of an air conditioner according to an embodiment as seen from the side. FIG. 2 is a schematic diagram showing the installation state of an air conditioner according to an embodiment as seen from an oblique direction. FIG. 3 is a perspective view of an indoor unit according to an embodiment. FIG. 4 is a schematic diagram showing the inside of an indoor unit according to an embodiment. FIG. 5 is an exploded view of an intake section according to an embodiment. FIG. 6 is an exploded view of an intake section according to an embodiment. FIG. 7 is a cross-sectional view of an intake section according to an embodiment. FIG. 8 is a cross-sectional view of a filter section and a cover taken along line IX-IX in FIG. 7. FIG. 9 is a schematic diagram showing the inside of an indoor unit according to an embodiment. FIG. 10 is an exploded view of an intake section according to an embodiment.

[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" or "second direction," the horizontal direction along the Y-axis is referred to as the "left-right direction Y" or "first direction," 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 side or one side of the second direction, 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 side or the other side of the second direction. The left-right direction Y is the left-right direction when facing forward (+X direction) of the indoor unit in the following embodiments. In other words, the side of the left-right direction Y toward which the Y-axis arrow points (+Y direction) is the left side, or one side of the first direction, and the side of the left-right direction Y opposite to the side toward which the Y-axis arrow points (-Y direction) is the right side, or the other side of the first direction.

[0011] <Overall Configuration> 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 includes an outdoor unit 10, an indoor unit 20, 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 refrigerant piping 18 through which 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 exhausts 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 inside the refrigerant pipes 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 rate adjustment 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 rate adjustment 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 refrigerant piping 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 refrigerant piping 18 that is located inside the outdoor unit housing 11.

[0015] The four-way valve 16 is provided in a portion of the refrigerant piping 18 that is connected to the discharge side of the compressor 12. The four-way valve 16 can reverse the direction of refrigerant 19 flowing through the refrigerant piping 18 by switching a portion of the path of the refrigerant piping 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 refrigerant piping 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 refrigerant piping 18 in the direction shown by the dashed arrow in Fig. 1.

[0016] The indoor unit 20 includes an indoor unit housing (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. 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 illustrated schematically in FIG. 1 .

[0017] When the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the refrigerant pipe 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 refrigerant pipe 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 refrigerant pipe 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 refrigerant pipe 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] 2 and 3 are schematic diagrams showing the installation state of the air conditioner 100 according to the embodiment. As shown in Fig. 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 its 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 housing 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 housing 21. The outer shell member 21b improves the design of the exterior of the indoor unit 20. The outer shell member 21b is a substantially rectangular box-shaped member 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 housing 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 housing 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 an 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. A wind 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 23 a, 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 outside 7. The drain hose 20d discharges drain water that condenses on the heat exchanger 22 to the outside 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, thereby 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 refrigerant pipe 18 and a first electrical wiring 10e. The refrigerant pipe 18 is configured in a loop shape between the outdoor unit 10 and the indoor unit 20. Therefore, the refrigerant pipe 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 refrigerant pipe 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 refrigerant pipe 18 and the first electrical wiring 10e are drawn from the indoor space 8 to the outdoor space 7.

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

[0030] The ventilation device 30 has an intake section 32, ventilation piping 31, and a ventilation device main body 50. The intake section 32 is attached to the indoor unit 20 in 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 room 8 and the outdoor room 7.

[0031] The ventilation device main body 50 has a ventilation fan 51 therein. The ventilation fan 51 is connected to the ventilation pipe 31. The ventilation fan 51 generates negative pressure in the ventilation pipe 31 and sends air from the room 8 to the outside 7 through the ventilation pipe 31.

[0032] The ventilation pipe 31 is a tubular pipe. The ventilation pipe 31 connects the ventilation fan 51 of the ventilation device main body 50 to the 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] Figure 4 is a perspective view of the indoor unit 20 of this embodiment. The indoor unit housing 21 of the indoor unit 20 has a lower plate 26 that covers the lower side of the heat exchanger 22 (see Figure 2) that is arranged inside. The lower plate 26 is arranged perpendicular to the vertical direction Z. The lower plate 26 is provided with a lower surface 21q of the indoor unit housing 21. The intake section 32 of the ventilation device 30 is attached to the lower plate 26. In other words, the intake section 32 is located on the lower surface 21q of the indoor unit housing 21.

[0034] Fig. 5 is a schematic diagram showing the inside of the indoor unit 20 of this embodiment. As shown in Fig. 5, the indoor unit 20 is installed on the wall surface 9a, covering a through-hole 9h provided in the wall 9. The refrigerant piping 18, drain hose 20d, and ventilation piping 31 extend from the rear of the indoor unit 20 to the outside of the indoor unit housing 21 and pass through the through-hole 9h. In this embodiment, the through-hole 9h is located near the left end of the back surface of the indoor unit 20.

[0035] The refrigerant pipe 18 extends rearward from the left end of the heat exchanger 22 inside the indoor unit 20. Therefore, the refrigerant pipe 18 passes directly through the through-hole 9h without bending inside the indoor unit 20.

[0036] The drain hose 20d is connected to a drain pan 20e that is disposed inside the indoor unit 20 and below the heat exchanger 22. The drain pan 20e has connection portions for connecting to the drain hose 20d at its right and left ends. In this embodiment, in order to shorten the distance to the through-hole 9h, the drain hose 20d is connected to the left end of the drain pan 20e.

[0037] The intake section 32 of the ventilation device 30 is attached to the right end of the indoor unit 20. Therefore, the ventilation piping 31 extends in the left-right direction Y inside the indoor unit 20 from the intake section 32 to the through-hole 9h. Inside the indoor unit 20, the ventilation piping 31 passes behind and below the heat exchanger 22.

[0038] The suction section 32 can also be attached to the left end of the indoor unit 20. However, when the through-hole 9h opens to the rear of the left end of the indoor unit 20, the refrigerant piping 18 and the drain hose 20d are arranged densely in front of the through-hole 9h, making it difficult to secure space for arranging the suction section 32. For this reason, when the through-hole 9h opens to the rear of the left end of the indoor unit 20 as shown in Figure 5, it is preferable to arrange the suction section 32 at the right end of the indoor unit 20.

[0039] 6 and 7 are exploded views of the suction section 32. As shown in FIG. 6, the suction section 32 has a joint section 32a, a filter section 80, and a cover 90.

[0040] The joint part 32a is fixed to the indoor unit housing 21. The joint part 32a is fixed to the indoor unit 20 before the indoor unit 20 is installed on the wall surface 9a. In order to remove the joint part 32a from the indoor unit 20, it is necessary to remove the indoor unit 20 from the wall surface 9a. In other words, the joint part 32a is not detachable from the indoor unit housing 21. The joint part 32a has a joint pipe 60 and a base plate 70.

[0041] As shown in FIG. 7 , the joint pipe 60 is a pipe-shaped member made of a resin material. The joint pipe 60 has a pipe connection portion 61, a plate connection portion 62, and a curved portion 63. The pipe connection portion 61 is connected to the tip of the ventilation pipe 31. The pipe connection portion 61 extends in the left-right direction Y and opens to the left. Therefore, the ventilation pipe 31 is connected to the pipe connection portion 61 from the left. The plate connection portion 62 is connected to the base plate 70. The plate connection portion 62 extends in the vertical direction Z and opens downward. The opening provided at the lower end of the plate connection portion 62 is called the opening 62b. The opening 62b faces downward. The curved portion 63 connects the pipe connection portion 61 and the plate connection portion 62. The curved portion 63 slopes upward from the pipe connection portion 61 toward the plate connection portion 62, and then slopes downward. As a result, the curved portion 63 smoothly curves the flow path from the opening 62 b to the ventilation pipe 31 , thereby suppressing an increase in flow path resistance within the joint pipe 60 .

[0042] A pipe marker 68 is provided on the outer surface of the curved portion 63. The pipe marker 68 of the joint pipe 60 in this embodiment is circular. As will be described later, the pipe marker 68 is used as a marker for the orientation of the joint pipe relative to the base plate 70.

[0043] The base plate 70 is made of a resin material and is attached to the lower plate 26 of the indoor unit 20. The joint pipe 60 and the cover 90 are also attached to the base plate. The base plate 70 has a plate body 71, a first mounting piece 73, a second mounting piece 74, a pair of side plate portions 76, and a rear plate portion 77.

[0044] The plate body 71 is in the form of a plate disposed perpendicular to the vertical direction Z. The plate body 71 is rectangular when viewed in the vertical direction Z. The plate body 71 is provided with a retaining hole 72h that penetrates the plate body 71 in the vertical direction Z. The retaining hole 72h is circular when viewed in the vertical direction Z. The periphery of the retaining hole 72h in the plate body 71 is formed to bulge upward in the shape of a conical surface.

[0045] Two base markings 78, 79 of different shapes are provided on the upper surface 71a of the plate body 71. One base marking 78 is circular, and the other base marking 79 is triangular. In the following description, the circular base marking 78 will be referred to as the first base marking 78, and the triangular base marking 79 will be referred to as the second base marking 79.

[0046] The plate connecting portion 62 of the joint pipe 60 is inserted into the retaining hole 72h. A fitting rib 62a extending in the circumferential direction is provided on the outer peripheral surface of the plate connecting portion 62. The outer diameter of the fitting rib 62a when viewed in the vertical direction Z is slightly larger than the outer diameter of the retaining hole 72h. The joint pipe 60 is attached to the base plate 70 by pressing the plate connecting portion 62 into the retaining hole 72h from above and positioning the fitting rib 62a below the inner edge of the retaining hole 72h.

[0047] When assembling the joint pipe 60 and the base plate 70, the assembler aligns the position of the pipe marker 68 of the joint pipe 60 with the position of the first base marker 78 of the base plate 70 in the circumferential direction of the retaining hole 72h. This makes it easy to set the extension direction of the pipe connection portion 61 of the joint pipe 60 relative to the base plate 70. Note that, in this embodiment, the base plate 70 is provided with two types of base markers 78, 79 having different shapes. The assembler selects, from the two types of base markers 78, 79, the first base marker 78 whose shape matches the circular pipe marker 68 provided on the joint pipe 60, and aligns its circumferential position with the pipe marker 68. Here, "matching in shape" does not only mean that the shapes are the same in the strict sense, but also that the shapes are similar enough that an assembler can match them. As will be explained later with reference to Figures 10 and 11, a different type of joint pipe 160 is provided to install the suction section 32 at the left end of the indoor unit 20, and this joint pipe 160 is provided with a triangular pipe mark 169 that corresponds to the second base mark 79.

[0048] The first mounting piece 73 is located at the rear end of the base plate 70. The first mounting piece 73 has a first rib 73a and a pair of first upper end pieces 73b. The first rib 73a protrudes upward from the upper surface 71a of the plate body 71. The first rib 73a has a first portion 73c extending in the left-right direction Y along the rear edge of the plate body 71 and a second portion 73d extending in the front-rear direction along the pair of left-right edges. The first portion 73c extends the entire length of the rear edge of the plate body 71. The pair of second portions 73d are connected to each end of the first portion 73c in the left-right direction Y. The second portion 73d is provided only in one region rearward of the left-right edges of the plate body 71. The right-side one of the pair of second portions 73d is located to the left of the right edge of the plate body 71. One of the pair of second portions 73d, located slightly to the left, is located slightly to the right of the left edge of the plate body 71. The pair of first upper end pieces 73b are connected to the upper ends of the second portions 73d. One of the pair of first upper end pieces 73b protrudes to the right from the upper end of the one of the pair of second portions 73d that is located on the right. The other of the pair of first upper end pieces 73b protrudes to the left from the upper end of the other of the pair of second portions 73d that is located on the left. The first upper end piece 73b is plate-shaped and perpendicular to the vertical direction Z. The first upper end piece 73b faces the upper surface 71a of the plate body 71 with a gap between them.

[0049] The second mounting piece 74 is located at the front end of the base plate 70, in the center in the left-right direction Y. The second mounting piece 74 has a pillar portion 74a and a second upper end piece 74b. The pillar portion 74a protrudes upward from the upper surface 71a of the plate body 71. The pillar portion 74a is located slightly rearward of the front edge of the plate body 71. The second upper end piece 74b protrudes forward from the upper end of the pillar portion 74a. The second upper end piece 74b is plate-shaped and perpendicular to the vertical direction Z. The second upper end piece 74b faces the upper surface 71a of the plate body 71 with a gap between them.

[0050] As shown in Figure 6, the lower plate 26 of the indoor unit housing 21 has a rear edge 26a that faces the wall surface 9a. The rear edge 26a extends in the left-right direction Y along the wall surface 9a. A small gap is provided between the rear edge 26a and the wall surface 9a. The lower plate 26 also has a notch 26c that extends forward from the rear edge 26a. A slit corresponding to the notch 26c is formed in the lower plate 26 in advance, and the installer forms the notch 26c in the lower plate 26 by removing a portion of the lower plate 26 along the slit.

[0051] The base plate 70 is attached to the cutout 26c of the lower plate 26. The base plate 70 is inserted from behind the cutout 26c, and the lower plate 26 is inserted between the pair of first upper end pieces 73b and the upper surface 71a of the plate body 71. By further moving the base plate forward, the edge of the lower plate 26 in front of the cutout 26c is inserted between the second upper end piece 74b and the upper surface 71a of the plate body. This fixes the base plate 70 to the lower plate 26, and the base plate 70 covers the cutout 26c.

[0052] The rear plate portion 77 protrudes downward from the rear edge of the plate main body 71 and extends in the left-right direction Y along the rear edge. The rear plate portion 77 is plate-shaped and perpendicular to the front-to-rear direction X. The pair of side plate portions 76 protrude downward from the pair of left-to-right edges of the plate main body 71, respectively, and extend in the front-to-rear direction along the left-to-right edges. The pair of side plate portions 76 are plate-shaped and perpendicular to the left-to-right direction Y. The rear plate portion 77 extends over the entire length of the rear edge of the plate main body 71. The pair of side plate portions 76 are connected to each end of the rear plate portion 77 in the left-to-right direction Y.

[0053] 7, the pair of side plates 76 have symmetrical shapes relative to each other in the left-right direction Y. The following description focuses on the right-side side plate 76A of the pair of side plates 76, and omits a description of the left-side side plate 76B. The left-side side plate 76B has the same configuration as the right-side side plate 76A, except that it has a shape that is the inverse of the right-side side plate 76A in the left-right direction Y.

[0054] The side plate 76A has a rail portion 75 on a side surface 76f facing right. The rail portion 75 extends in the front-rear direction X. The rail portion 75 is configured as a stepped portion provided on the side surface of the side plate 76A. Note that not only the right side plate 76A but also the left side plate 76B has a rail portion 75. Therefore, the joint portion 32a has a pair of rail portions 75 that are aligned in the left-right direction Y and extend in the second direction.

[0055] The rail portion 75 has a support surface 75a, an opposing surface 75c, an inclined surface 75b, an abutment surface 75e, and a protrusion 75d. The support surface 75a faces upward. In this embodiment, the support surface 75a is perpendicular to the vertical direction Z. The support surface 75a extends in the front-rear direction X. The inclined surface 75b is continuous with the front end of the support surface 75a. The inclined surface 75b inclines downward as it extends forward.

[0056] The opposing surface 75c is continuous with the left edge of the support surface 75a. In this embodiment, the opposing surface 75c is perpendicular to the left-right direction Y. The opposing surface 75c extends in the front-rear direction X. The opposing surface 75c faces to the right. The opposing surface 75c provided on the right side plate portion 76B faces to the left. Therefore, the opposing surfaces 75c of the left side plate portion 76A and the right side plate portion 76B face opposite sides in the left-right direction Y. A protrusion 75d is provided on the opposing surface 75c. The protrusion 75d is located near the rear end of the entire length of the opposing surface 75c. The protrusion 75d protrudes in the left-right direction Y. The abutment surface 75e is continuous with the rear end of the opposing surface 75c. The opposing surface 75c faces forward.

[0057] The cover 90 has a cover plate 97, a front wall 99, and a pair of side wall portions 98. The cover plate 97 is a plate member that is perpendicular to the vertical direction Z. The cover plate 97 has a rectangular shape when viewed in the vertical direction Z.

[0058] As shown in Figure 9, the cover plate 97 is provided with an air vent 90h that penetrates the cover plate 97 in the vertical direction Z. The air vent 90h has, for example, a rectangular shape when viewed in the vertical direction Z. The cover plate 97 covers the opening 62b of the joint part 32a from below. The air vent 90h of the cover plate 97 overlaps with the opening 62b when viewed in the vertical direction Z. Air from the room 8 is sucked in from the opening 62b via the air vent 90h.

[0059] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 7 . As shown in FIG. 9 , the cover plate 97 has multiple rod-shaped portions 97a that cover portions of the air vent 90h. The rod-shaped portions 97a extend in the left-right direction Y. The rod-shaped portions 97a are also aligned in the front-rear direction X. The cross-sections of the rod-shaped portions 97a are generally rectangular, with the vertical direction Z as their longitudinal direction. The filter portion 80 is disposed above the cover plate 97. Covering the air vent 90h with the rod-shaped portions 97a protects the filter portion 80 located above the air vent 90h. Furthermore, because the rod-shaped portions 97a are aligned in the front-rear direction X and have a cross-section with the vertical direction as its longitudinal direction, the filter portion 80 is difficult to see even when observing the intake portion 32 from the front. This reduces the visibility of dust and other particles adhering to the filter portion 80 to the occupants of the room 8.

[0060] The cover plate 97 also has a pair of holders 93A, 93B that hold the filter 80. The pair of holders 93A, 93B are aligned in the front-to-rear direction X. The pair of holders 93A, 93B are disposed in front of and behind the air vent 90h. The specific configurations and functions of the holders 93A, 93B will be described in detail later.

[0061] As shown in Figure 7, the front wall 99 protrudes upward from the front edge of the cover plate 97 and extends in the left-right direction along the front edge of the cover plate 97. The front wall 99 is plate-shaped and perpendicular to the front-rear direction. The pair of side wall portions 98 protrude upward from the edge of the cover plate 97 in the left-right direction Y and extend in the front-rear direction X along the edge of the cover plate 97 in the left-right direction Y. The pair of side wall portions 98 are plate-shaped and perpendicular to the left-right direction Y.

[0062] The pair of side wall portions 98 each have an inner surface 98a that faces each other in the left-right direction Y. A first guide portion (guide portion) 91 and a second guide portion 92 are provided on the inner surface 98a. The first guide portion 91 and the second guide portion 92 are protrusions that protrude in the left-right direction Y from the inner surface 98a. The first guide portion 91 and the second guide portion 92 extend in a rib-like manner in the front-rear direction X. The first guide portion 91 and the second guide portion 92 are aligned in the front-rear direction X.

[0063] Each of the pair of side wall portions 98 has a first guide portion 91 and a second guide portion 92. That is, the cover 90 has a pair of first guide portions 91 and a pair of second guide portions 92. The first guide portions 91 provided on the pair of side wall portions 98 face each other in the left-right direction Y. Similarly, the second guide portions 92 provided on the pair of side wall portions 98 face each other in the left-right direction Y.

[0064] The first guide portion 91 and the second guide portion 92 are supported by the rail portion 75. More specifically, the first guide portion 91 and the second guide portion 92 are supported from below by the support surface 75a of the rail portion 75. The first guide portion 91 and the second guide portion 92 face the opposing surface 75c of the rail portion 75 in the left-right direction Y.

[0065] In this embodiment, because the support surface 75a of the rail portion 75 extends in the front-rear direction, the cover 90 can be moved in the front-rear direction X by sliding the first guide portion 91 and the second guide portion 92 on the support surface 75a. That is, according to the suction portion 32 of this embodiment, the cover 90 can be easily attached to and detached from the joint portion 32a by moving the cover 90 back and forth relative to the joint portion 32a.

[0066] As described above, the front end of the support surface 75a is provided with an inclined surface 75b that slopes downward as it approaches the front. The inclined surface 75b guides the first guide portion 91 to the support surface 75a when attaching the cover 90 to the joint portion 32a. Typically, the indoor unit 20 is installed in an area of ​​the wall surface 9a of the room 8 that is close to the ceiling. For this reason, the work of attaching the cover 90 to the joint portion 32a on the underside 21q of the indoor unit 20 is performed from below the joint portion 32a. According to this embodiment, because the inclined surface 75b slopes downward as it approaches the front (+X direction), when attaching the cover 90 to the joint portion 32a from the front (+X direction), the first guide portion 91 can be inserted onto the support surface 75a from diagonally below, making it easier to attach the cover 90.

[0067] According to this embodiment, a protrusion 75d protruding from the opposing surface 75c is provided in front of the abutment surface 75e of the rail portion 75. The distance in the front-rear direction X between the abutment surface 75e and the protrusion 75d is slightly greater than the dimension of the first guide portion 91 in the front-rear direction X. When the cover 90 is attached to the joint portion 32a, the first guide portion 91 is positioned between the abutment surface 75e and the protrusion 75d. Therefore, even if the indoor unit 20 is subjected to vibration or impact, the cover 90 is unlikely to come off the joint portion 32a. When attaching the cover 90 to the joint portion 32a, the first guide portion 91 moves over the protrusion 75d and is positioned between the abutment surface 75e and the protrusion 75d. The worker attaching the cover 90 to the joint portion 32a feels a click the moment the first guide portion 91 is positioned behind the protrusion 75d, allowing them to recognize that attachment is complete.

[0068] As shown in FIG. 9 , the first guide portion 91 and the second guide portion 92 each have tapered surfaces 91a, 92a at their rear ends, such that their protrusion heights (dimensions in the left-right direction Y) decrease toward the rear. Therefore, when the first guide portion 91 and the second guide portion 92 are inserted into the rail portion 75, the tapered surfaces 91a, 92a facilitate aligning the cover 90 with the joint portion 32a in the left-right direction Y. This improves the ease of attaching the cover 90 to the joint portion 32a. The forward-facing ends 91b, 92b of the first guide portion 91 and the second guide portion 92 are perpendicular to the front-rear direction X. The front end 91b of the first guide portion 91 faces the protrusion 75d in the front-rear direction X when the cover 90 is attached to the joint portion 32a. Therefore, by making the end portion 91b a surface perpendicular to the front-to-rear direction X, when the cover 90 is attached to the joint portion 32a, it becomes difficult for the first guide portion 91 to climb over the protrusion 75d, and the cover 90 can be prevented from coming off the joint portion 32a.

[0069] As shown in Figure 6, the filter unit 80 has a filter body 89 and a frame body 81. The filter body 89 is a mesh filter with its thickness direction aligned with the vertical direction Z. The filter body 89 covers the joint part 32a and the opening 62b from below. The filter body 89 captures dust contained in the air in the room 8 and prevents the dust from entering the opening 62b.

[0070] The frame body 81 has a pair of first beams 81a extending in the front-rear direction X and a pair of second beams 81b extending in the left-right direction Y. The ends of the pair of first beams 81a and the pair of second beams 81b are connected to each other. This gives the frame body 81 a frame shape when viewed from the vertical direction Z. The frame body 81 has a symmetrical shape in the front-rear direction X.

[0071] The outer shape of the frame body 81 is rectangular when viewed in the vertical direction Z. The frame body 81 has an opening window 81w that penetrates the frame body 81 in the vertical direction Z. The opening window 81w is rectangular when viewed in the vertical direction Z. A filter body 89 is stretched over the opening window 81w. This allows the frame body 81 to hold the filter body 89.

[0072] According to this embodiment, the frame 81 holds the filter body 89, and thus the frame 81 can apply a stable tension to the filter body 89, thereby preventing wrinkles from occurring in the filter body 89. Furthermore, when replacing the filter body 89, not only the filter body 89 but the entire filter unit 80 is replaced, which makes the replacement work easier than when the filter body 89 is attached directly to the cover 90.

[0073] In this embodiment, the frame body 81 is preferably sandwiched between the joint portion 32a and the cover 90. Here, "sandwiched" means that the frame body 81 is disposed between the two members while being in contact with the opposite sides of the two members. That is, the frame body 81 is supported from below by the cover 90 and pressed from above by the joint portion 32a. This prevents the filter unit 80 from shifting position between the joint portion 32a and the cover 90. Furthermore, because the filter unit 80 can be firmly held between the joint portion 32a and the cover 90, vibration of the filter unit 80 caused by wind passing through the filter body 89 when the ventilation device 30 is operating can be prevented.

[0074] 7, the first beam portion 81a has a rib 82 that protrudes upward. The rib 82 extends in the front-rear direction X. The rib 82 is provided on each of the pair of first beam portions 81a. Therefore, the frame body 81 has a pair of ribs 82 that are aligned in the left-right direction Y.

[0075] 8 is a cross-sectional view of the suction portion 32 of this embodiment. As shown in FIG. 8, the upper end surface 82a of the rib 82 contacts the lower surface 71b of the base plate 70. This achieves a configuration in which the joint portion 32a presses the frame body 81 toward the cover 90. Furthermore, the ribs 82 of this embodiment are disposed on both sides of the filter body 89 in the left-right direction Y when viewed from the vertical direction Z. Therefore, by pressing the ribs 82 against the lower surface 71b of the base plate 70, a force is applied to both sides of the filter body 89 in the left-right direction Y, which makes it possible to prevent wrinkles from occurring in the filter body 89.

[0076] The rear end of the rib 82 is provided with an inclined surface 82b that reduces the protruding height of the rib 82 toward the rear. Therefore, when attaching the joint part 32a to the cover 90 with the filter part 80 attached, the rear end of the rib 82 is less likely to get caught on the lower surface 71b of the joint part 32a, facilitating a smooth attachment operation. In this embodiment, the filter part 80 has a shape that is symmetrical in the front-rear direction X so that it can be used even when inverted in the front-rear direction X. Therefore, the rib 82 is provided with a similar inclined surface 82b not only at the rear end but also at the front end.

[0077] As shown in FIG. 9 , the second beam portion 81b has a hook portion 83 that protrudes downward. The hook portion 83 is provided on each of the pair of second beam portions 81b. Therefore, the frame body 81 has a pair of hook portions 83 that are aligned in the front-to-rear direction X. The hook portion 83 has a leg portion 83a that protrudes downward and a claw portion 83b that protrudes in the front-to-rear direction X from the lower end of the leg portion 83a. Of the pair of hook portions 83, the claw portion 83b of one hook portion 83 protrudes forward, and the claw portion 83b of the other hook portion 83 protrudes rearward. The claw portions 83b of the pair of hook portions 83 protrude in directions facing each other.

[0078] The claw portion 83b has an upper surface 83c and a lower surface 83d. The upper surface 83c is a surface parallel to the protruding direction of the claw portion 83b (front-rear direction X). The lower surface 83d is inclined upward toward the tip end of the protruding direction of the claw portion 83b.

[0079] A pair of holding portions 93A, 93B provided on the cover 90 each hold one of the pair of hook portions 83. The pair of holding portions 93A, 93B are each provided with accommodating recesses 93a, 93b that accommodate the claw portions 83b of the hook portions 83. The accommodating recesses 93a, 93b are recessed in the front-rear direction X.

[0080] One of the pair of retaining portions 93A, 93B is referred to as the first retaining portion 93A, and the other is referred to as the second retaining portion 93B. The first retaining portion 93A is located forward of the second retaining portion 93B. The accommodating recess 93a of the first retaining portion 93A is recessed rearward from the front-facing surface of the first retaining portion 93A. On the other hand, the accommodating recess 93b of the second retaining portion 93B is recessed forward from the rear-facing surface of the second retaining portion 93B. In other words, the openings of the accommodating recesses 93a, 93b of the pair of retaining portions 93A, 93B face opposite each other in the front-to-rear direction.

[0081] The accommodating recesses 93a, 93b have downward-facing opposing holding surfaces 93p, 93q. The opposing holding surface 93p of the first holding portion 93A is a surface that is disposed along a horizontal plane (X-Y plane). On the other hand, the opposing holding surface 93q of the second holding portion 93B is inclined upward as it approaches the opening side of the accommodating recess 93b.

[0082] The pair of holding portions 93A, 93B also have guide surfaces 93d. The guide surface 93d of the first holding portion 93A is an inclined surface connecting the upper end surface of the first holding portion 93A to the surface facing forward. The guide surface 93d of the first holding portion 93A is inclined downward as it extends forward. The guide surface 93d of the second holding portion 93B is an inclined surface connecting the upper end surface of the second holding portion 93B to the surface facing rear. The guide surface 93d of the second holding portion 93B is inclined downward as it extends rearward.

[0083] When the filter unit 80 is attached to the cover 90, the pair of hooks 83 are positioned in front of the first holding portion 93A and behind the second holding portion 93B, respectively. Furthermore, the claws 83b are housed in the housing recesses 93a and 93b of the pair of holding portions 93A and 93B, respectively. In this state, the lower surfaces of the claws 83b face the opposing holding surfaces 93p and 93q of the respective holding portions 93A and 93B in the vertical direction Z. When an attempt is made to move the filter unit 80 upward, the upper surfaces 83c of the claws 83b come into contact with the opposing holding surfaces 93p and 93q, preventing the upward movement of the filter unit 80. This prevents the filter unit 80 from detaching from the cover 90.

[0084] To attach the filter unit 80 to the cover 90, the filter unit 80 is moved downward from above the cover 90. As a result, the lower surfaces 83d of the pair of claws 83b come into contact with the guide surfaces 93d of the holding portions 93A and 93B, respectively. When the filter unit 80 is moved further downward from this state, the lower surfaces of the pair of claws 83b slide along the guide surfaces 93d, and the frame body 81 elastically deforms in the direction in which the pair of claws 83b move away from each other, and the filter unit 80 is accommodated in the accommodation recesses 93a and 93b.

[0085] To remove the filter unit 80 from the cover 90, one of the pair of second beams 81b of the filter unit 80, the rear one on which the hook 83 held by the second holding unit 93B is provided, is lifted upward. Because the opposing holding surface 93q of the second holding unit 93B is inclined, the claw 83b accommodated in the second holding unit 93B slides upward along the opposing holding surface 93q and disengages from the accommodating recess 93b. Even if the claw 83b accommodated in the second holding unit 93B moves upward relative to the accommodating recess 93b, the accommodating recess 93a of the first holding unit 93A maintains the claw 83b accommodated therein. Therefore, the frame 81 gradually tilts with the front claw 83b as a fulcrum. After the claw 83b is completely disengaged from the second holding unit 93B, the filter unit 80 is moved forward, thereby completely removing the filter unit 80 from the cover 90.

[0086] In this embodiment, a front wall 99 of the cover 90 is disposed in front of the first holding portion 93A. The gap between the front wall 99 and the first holding portion 93A is sufficiently narrow that a finger cannot be inserted. This makes it difficult for an operator attempting to remove the filter unit 80 to apply an upward force to the first holding portion 93A. In contrast, no wall is provided behind the second holding portion 93B, so an operator can easily apply an upward force to the second holding portion 93B by inserting a finger from behind.

[0087] According to this embodiment, the holding facing surface 93p of the first holding portion 93A is disposed along a horizontal plane (X-Y plane). Meanwhile, the holding facing surface 93q of the second holding portion 93B is inclined upward toward the opening of the storage recess 93b. Therefore, the hook portion 83 is difficult to detach from the first holding portion 93A and relatively easy to detach from the second holding portion 93B. That is, according to this embodiment, by preventing the hook portion 83 from detaching with one of the holding portions 93A, it is possible to prevent the filter portion 80 from detaching from the cover 90 due to an impact or the like. Furthermore, in this case, even if the hook portion 83 held by the first holding portion 93A is manipulated, the hook portion 83 is difficult to remove from the first holding portion 93A. According to this embodiment, by making the holding facing surface 93p of the first holding portion 93A, into which the hook portion 83 not manipulated by the operator is inserted, disposed along a horizontal plane (X-Y plane), it is possible to prevent the operator from finding removal difficult.

[0088] Here, the phrase "arranged along a horizontal plane" of the holding opposing surface 93p in the front-to-rear direction X includes not only the case where the holding opposing surface 93p and the horizontal plane are parallel in the strict sense, but also the case where the holding opposing surface 93p is inclined within a range of ±5° with respect to the horizontal plane.

[0089] <Another example of installation on a wall> So far, we have described the configuration of the suction section 32 when the through-hole 9h in the wall 9 opens to the rear of the left end of the indoor unit 20. However, the above-mentioned suction section 32 can also be used when the through-hole 9h opens to the rear of the right end of the indoor unit 20.

[0090] Figure 10 is a schematic diagram showing the inside of the indoor unit 20 installed on a wall surface different from that shown in Figure 5. In this example, the through-hole 9h is located near the right end of the back surface of the indoor unit 20. Therefore, the refrigerant piping 18 is connected to the left end of the heat exchanger 22. Therefore, the refrigerant piping 18 extends in the left-right direction Y inside the indoor unit 20 from the left end of the heat exchanger 22 to the through-hole 9h. The drain hose 20d is connected to the right end of the drain pan 20e to shorten the distance from the through-hole 9h to the drain pan 20e.

[0091] 10 , when the through-hole 9h opens to the rear of the right end of the indoor unit 20, the intake section 132 of the ventilation device 30 is attached to the left end of the indoor unit 20. Therefore, the ventilation piping 31 extends in the left-right direction Y inside the indoor unit 20 from the intake section 132 to the through-hole 9h. Inside the indoor unit 20, the ventilation piping 31 passes behind and below the heat exchanger 22.

[0092] When the through-hole 9h opens to the rear of the right end of the indoor unit 20, the refrigerant piping 18 and the drain hose 20d are arranged closely together in front of the through-hole 9h, making it difficult to secure space for arranging the suction section 132. For this reason, when the through-hole 9h opens to the rear of the right end of the indoor unit 20, it is preferable to arrange the suction section 132 at the left end of the indoor unit 20.

[0093] Figure 11 is an exploded view of the suction section 132 when it is disposed at the left end of the indoor unit 20. As shown in Figure 11, the suction section 132 has a joint section 132a, a filter section 80, and a cover 90. The joint section 132a also has a base plate 70 and a joint pipe 160. When the suction section 132 is disposed at the left side of the indoor unit 20, only the joint pipe 160 is a different component compared to when it is disposed at the right side, and the other components can be used in common.

[0094] The joint pipe 160 has a pipe connection portion 161, a plate connection portion 162, and a curved portion 163. The pipe connection portion 161 is connected to the tip of the ventilation pipe 31. The pipe connection portion 161 extends in the left-right direction Y and opens to the right. Therefore, the ventilation pipe 31 is connected to the pipe connection portion 161 from the left. The plate connection portion 162 is connected to the base plate 70. The plate connection portion 162 extends in the vertical direction Z and opens downward.

[0095] The curved portion 163 connects the pipe connection portion 161 and the plate connection portion 162. The curved portion 163 slopes downward from the pipe connection portion 161 toward the plate connection portion 162. The pipe connection portion 161 has a flat shape that widens in the front-to-rear direction X while effectively suppressing its height. Therefore, the flow path cross section within the curved portion 163 is flat with the front-to-rear direction X as its longitudinal direction. As shown in FIG. 10 , the connection portion between the heat exchanger 22 and the refrigerant pipe 18 is disposed on the left side of the indoor unit 20. Therefore, when the suction portion 132 is disposed on the left side of the indoor unit 20, the suction portion 132 and the refrigerant pipe 18 are close to each other. According to this embodiment, when the suction portion 132 is disposed on the left side of the indoor unit 20, the joint pipe 160 is flattened, so that the joint pipe 160 can be positioned to avoid the refrigerant pipe 18 while still ensuring the flow path cross-sectional area of ​​the joint pipe 160.

[0096] As shown in Figure 11, a pipe marker 169 is provided on the outer surface of the curved portion 163. The pipe marker 169 of the joint pipe 160 is triangular. That is, the shape of the pipe marker 169 matches the shape of the second base marker 79 of the base plate 70. When assembling the joint pipe 160 and the base plate 70, the assembler aligns the position of the pipe marker 169 of the joint pipe 160 with the position of the second base marker 79 of the base plate 70. This makes it easy to set the extension direction of the pipe connection portion 161 of the joint pipe 160 relative to the base plate 70.

[0097] According to this embodiment, a first base mark 78 and a second base mark 79 corresponding to the installation directions of the two types of joint pipes 60, 160 are provided on the upper surface 71a of the base plate 70. Therefore, when selecting one of the multiple types of joint pipes 60, 160 depending on where in the air conditioner 100 the suction section 32, 132 is to be located, the selected joint pipe 60, 160 can be easily attached to the base plate 70 in the correct orientation.

[0098] <Summary> The air conditioner 100 of this embodiment includes an indoor unit 20, an outdoor unit 10, refrigerant piping 18, and a ventilation device 30. The indoor unit 20 is installed on a wall surface 9a of the room 8 and has a heat exchanger (first heat exchanger) 22 and an indoor unit housing (housing) 21 that houses the heat exchanger 22. The outdoor unit 10 is installed on the outdoor space 7 and has a heat exchanger (second heat exchanger) 13. The refrigerant piping 18 passes through a through-hole 9h in the wall 9 that separates the room 8 from the outdoor space 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 has an intake section 32, a ventilation fan 51, and ventilation piping 31. The intake section 32 is provided on the underside of the indoor unit housing 21 and draws in air from the room 8. The ventilation fan 51 is located on the outdoor space 7. The ventilation pipe 31 passes through the through hole 9h and connects the suction section 32 and the ventilation fan 51. The suction section 32 has a joint section 32a, a filter section 80, and a cover 90. The joint section 32a has an opening section 62b that opens into the room 8. The joint section 32a is connected to the tip of the ventilation pipe 31. The filter section 80 covers the opening section 62b. The cover 90 covers the filter section 80. The cover 90 is breathable. The cover 90 is detachably fixed to the joint section 32a. The filter section 80 is detachably fixed to the cover 90.

[0099] According to the above-described configuration, as shown in FIG. 6 , the filter unit 80 is provided in the intake section 32 of the ventilation fan 51, allowing the filter unit 80 to capture dust and other particles contained in the air in the room 8. This prevents dust and other particles from being discharged to the outside 7 along with the exhaust air and causing dirt around the exhaust port. According to the above-described configuration, the filter unit 80 is covered by the cover 90. This prevents the filter unit 80 from being directly exposed to the room 8, making it difficult for occupants in the room 8 to see dust and other particles adhering to the surface of the filter unit 80 facing the room 8. Furthermore, covering the filter unit 80 with the cover 90 protects the filter unit 80. According to this configuration, the filter unit 80 can be removed from the indoor unit 20 together with the cover 90 by removing the cover 90 from the joint section 32a provided on the underside 21q of the indoor unit 20. Furthermore, because the filter unit 80 is detachable from the cover 90, the filter unit 80 can be easily replaced or cleaned.

[0100] In the air conditioner 100 of this embodiment, the indoor unit housing 21 has a lower plate 26 that covers the lower portion of the heat exchanger 22. The lower plate 26 has a notch 26c extending forward from a rear edge 26a facing the wall surface 9a. The joint portion 32a has a joint pipe 60 connected to the end of the ventilation pipe 31 and a base plate 70 with a retaining hole 72h into which the joint pipe 60 is inserted. The base plate 70 is attached to the notch 26c. With this configuration, the suction section 32 of the ventilation device 30 can be attached to the indoor unit 20 using the notch 26c of the indoor unit housing 21, which is provided to pass the refrigerant pipe 18, etc. This eliminates the need for a special structure for attaching the suction section 32 to the indoor unit 20, making it possible to attach the suction section 32 to various models of indoor units 20.

[0101] In the air conditioner 100 of this embodiment, as shown in FIGS. 7 and 11 , multiple base markers 78, 79 of different shapes are provided on the upper surface 71a of the base plate 70. A pipe marker 68, 169 whose shape matches one of the multiple base markers 78, 79 is provided on the joint pipe 60, 160. In the above-described configuration, multiple joint pipes 60, 160 are prepared and selected appropriately depending on the routing of the refrigerant piping 18 and ventilation piping 31 within the indoor unit housing 21. According to the above-described configuration, the base plate 70 is provided with the base markers 78, 79 corresponding to the installation direction of each joint pipe 60, 160. Therefore, regardless of which of the multiple types of joint pipes 60, 160 is selected, the joint pipe 60, 160 can be easily installed in the correct orientation on the base plate 70. This simplifies the installation work of the air conditioner 100 by the installer.

[0102] In the air conditioner 100 of this embodiment, two directions that are perpendicular to the vertical direction Z and perpendicular to each other are defined as a first direction (left-right direction Y) and a second direction (front-rear direction X). As shown in FIG. 7 , the joint portion 32a has a pair of rail portions 75 that are aligned in the first direction (left-right direction Y) and extend in the second direction (front-rear direction X). The cover 90 has a pair of first guide portions (guide portions) 91 that are supported by the pair of rail portions 75. Each of the pair of rail portions 75 has a support surface 75a that extends in the second direction (front-rear direction X) and supports the first guide portion 91 from below, and an opposing surface 75c that extends in the second direction (front-rear direction X) and faces the first guide portion 91 in the first direction (left-rear direction Y). The opposing surfaces 75c of the pair of rail portions 75 face in different directions in the first direction (left-rear direction Y). According to this configuration, a pair of first guide portions 91 of the cover 90 are supported by a pair of rail portions 75 of the joint portion 32a, so that the cover 90 can be easily attached and detached to and from the joint portion 32a by sliding the cover 90 relative to the joint portion 32a.

[0103] In the air conditioner 100 of this embodiment, the rail portion 75 has an inclined surface 75b. The inclined surface 75b is continuous with the end of the support surface 75a on one side in the second direction (+X direction) and inclines downward (in the -Z direction) as it moves toward one side in the second direction (+X direction). Typically, the indoor unit 20 is installed in an area of ​​the wall surface 9a of the room 8 close to the ceiling. Therefore, the work of attaching the cover 90 to the joint portion 32a on the underside 21q of the indoor unit 20 is performed from below the joint portion 32a. According to the above-described configuration, because the inclined surface 75b inclines downward as it moves toward one side in the second direction (+X direction), when attaching the cover 90 to the joint portion 32a from one side in the second direction, the first guide portion 91 can be inserted onto the support surface 75a even from diagonally below, making it easier to attach the cover 90.

[0104] In the air conditioner 100 of this embodiment, the rail portion 75 has an abutment surface 75e that connects to the end of the opposing surface 75c on the other side in the second direction (-X direction) and faces one side in the second direction (+X direction). The opposing surface 75c is provided with a protrusion 75d that protrudes in the first direction (left-right direction Y). The first guide portion 91 is disposed between the abutment surface 75e and the protrusion 75d. With this configuration, when the cover 90 is attached to the joint portion 32a, the first guide portion 91 is disposed between the abutment surface 75e and the protrusion 75d. Therefore, even if vibration or impact is applied to the indoor unit 20, the cover 90 is unlikely to come off the joint portion 32a. Furthermore, when the cover 90 is attached to the joint portion 32a, the first guide portion 91 rides over the protrusion 75d and is disposed between the abutment surface 75e and the protrusion 75d. The worker attaching the cover 90 to the joint portion 32a feels a click the moment the first guide portion 91 is positioned behind the projection 75d, and can recognize that attachment is complete.

[0105] In the air conditioner 100 of this embodiment, the filter unit 80 has a mesh-like filter body 89 and a frame 81. The thickness direction of the filter body 89 is the vertical direction. The frame 81 holds the filter body 89. With this configuration, the frame 81 holds the filter body 89, thereby applying stable tension to the filter body 89 and preventing wrinkles from forming in the filter body 89. Furthermore, when replacing the filter body 89, the entire filter unit 80 can be replaced, making the replacement process easier.

[0106] In the air conditioner 100 of this embodiment, the frame 81 is sandwiched between the joint portion 32a and the cover 90 in the vertical direction Z. This configuration can prevent the filter portion 80 from becoming misaligned between the joint portion 32a and the cover 90. Furthermore, vibration of the filter portion 80 when the ventilation device 30 is operating can be prevented, and dust and other particles can be prevented from falling from the filter portion 80.

[0107] In the air conditioner 100 of this embodiment, the frame 81 has a pair of ribs 82 that protrude upward and extend in a direction perpendicular to the vertical direction Z (in this embodiment, the front-to-rear direction X). The pair of ribs 82 are arranged on both sides of the filter body 89 in a direction perpendicular to the direction in which the pair of ribs 82 extend (in this embodiment, the left-to-right direction Y) as viewed from the vertical direction Z. The upper end surfaces 82a of the ribs 82 contact the lower surfaces 71b of the joint portions 32a. According to the above-described configuration, the pair of ribs 82 are arranged on both sides of the filter body 89 in the left-to-right direction Y as viewed from the vertical direction Z. Therefore, when a downward force is applied to the ribs 82 from the base plate 70, the filter body 89 is also pressed downward on both sides in the left-to-right direction Y. This makes it less likely for wrinkles to form in the filter body 89.

[0108] In the air conditioner 100 of this embodiment, the frame 81 has a pair of hook portions 83 aligned in one direction (the front-to-rear direction X in this embodiment) perpendicular to the vertical direction. Each of the pair of hook portions 83 has a leg portion 83a protruding downward and a claw portion 83b protruding in one direction (the front-to-rear direction X) from the leg portion 83a. The claw portions 83b of the pair of hook portions 83 protrude in different directions. The cover 90 has a pair of holding portions 93A, 93B that respectively hold the pair of hook portions 83. The pair of holding portions 93A, 93B are provided with storage recesses 93a, 93b that are recessed in one direction (the front-to-rear direction X) to accommodate the claw portions 83b. The inner surfaces of the storage recesses 93a, 93b have holding opposing surfaces 93p, 93q that face the upper surfaces 83c of the claw portions 83b. According to this configuration, the filter unit 80 can be fixed to the cover 90 with a simple structure of the hook portion 83 and the holding portions 93A and 93B. Therefore, the filter unit 80 can be easily attached to and detached from the cover 90.

[0109] In the air conditioner 100 of this embodiment, one of the pair of holders 93A, 93B is designated as the first holder 93A, and the other is designated as the second holder 93B. The holding opposing surface 93p of the first holder 93A is arranged along a horizontal plane perpendicular to the vertical direction Z. The holding opposing surface 93q of the second holder 93B is inclined upward as it approaches the opening of the accommodation recess 93b. With this configuration, by arranging the holding opposing surface 93p of the first holder 93A along a horizontal plane, it is possible to make it difficult for the claw portion 83b to come off the first holder 93A. On the other hand, by making the holding opposing surface 93q of the second holder 93B an inclined surface as described above, it is possible to make it easier to detach the claw portion 83b from the second holder 93B. Therefore, a structure can be realized in which the filter part 80 can be removed from the cover 90 only when an upward force is applied to the hook part 83 held by the second holding part 93B, thereby preventing the filter part 80 from unintentionally detaching from the cover 90.

[0110] In the air conditioner 100 of this embodiment, the first holding portion 93A is located on one side in one direction (the +X direction) of the second holding portion 93B. The cover 90 has a front wall portion 99 located on one side in one direction (the +X direction) of the second holding portion 93B. With this configuration, the size of the gap between the second holding portion 93B and the front wall portion 99 is set to a size that makes it difficult to insert a finger, thereby encouraging the operator to naturally operate the hook portion 83 held by the first holding portion 93A.

[0111] 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.

[0112] 7...outdoor, 8...indoor, 9...wall, 9a, 9b...wall surface, 9h...through hole, 10...outdoor unit, 13...heat exchanger (second heat exchanger), 18...refrigerant piping, 19...refrigerant, 20...indoor unit, 21...indoor unit housing (housing), 22...heat exchanger (first heat exchanger), 26...lower plate, 26a...rear end edge, 26c...notch, 30...ventilation device, 31...ventilation piping, 32, 132...suction section, 32a, 132a...joint section, 51...ventilation fan, 60, 160...joint pipe, 62b...opening, 68, 169...pipe mark, 70...base plate, 72h...retaining hole, 75...rail section, 7 5a...support surface, 75b...inclined surface, 75c...opposing surface, 75d...projection, 75e...butting surface, 76f...side surface, 78, 79...base marking, 80...filter portion, 81...frame body, 82...rib, 82a...upper end surface, 83...hook portion, 83a...leg portion, 83b...claw portion, 89...filter body, 90...cover, 91...first guide portion (guide portion), 93a, 93b...accommodating recess, 93p, 93q...holding opposing surface, 93A...first holding portion (holding portion), 93B...second holding portion (holding portion), 100...air conditioner, Z...vertical direction, X...front-rear direction (second direction), Y...left-right direction (first direction)

Claims

1. an indoor unit that is installed on a wall surface inside a room and has a first heat exchanger and a housing that houses the first heat exchanger; an outdoor unit installed outdoors and having a second heat exchanger; a refrigerant pipe passing through a through hole in a wall separating the indoor space from the outdoor space and connecting the first heat exchanger and the second heat exchanger; A ventilation device for ventilating the air in the room, The ventilation device includes: an intake section provided on a lower surface of the housing and configured to intake air from within the room; A ventilation fan disposed outside the room; A ventilation pipe passing through the through hole and connecting the suction part and the ventilation fan, The suction section is A joint portion having an opening portion that opens into the room and is connected to a tip end of the ventilation pipe; A filter portion covering the opening; A breathable cover that covers the filter unit, The cover is detachably fixed to the joint portion, The filter unit is removably fixed to the cover. Air conditioner.

2. The housing has a lower plate that covers a lower portion of the first heat exchanger, The lower plate is provided with a notch extending forward from a rear end edge facing the wall surface, The joint portion is A joint pipe connected to the tip of the ventilation pipe; a base plate having a holding hole into which the joint pipe is inserted; The base plate is attached to the cutout portion. The air conditioner according to claim 1.

3. A plurality of base marks having different shapes are provided on the upper surface of the base plate; The joint pipe is provided with a pipe mark having a shape identical to any one of the plurality of base marks. The air conditioner according to claim 2.

4. Two directions perpendicular to the vertical direction and perpendicular to each other are defined as a first direction and a second direction, the joint portion has a pair of rail portions aligned in the first direction and extending in the second direction, the cover has a pair of guide portions supported by the pair of rail portions, The pair of rail portions include A support surface extending in the second direction and supporting the guide portion from below; an opposing surface extending in the second direction and opposing the guide portion in the first direction, The opposing surfaces of the pair of rail portions face in different directions in the first direction. The air conditioner according to claim 1.

5. the rail portion has an inclined surface that is connected to an end portion of the support surface on one side in the second direction and inclined downward as it approaches the one side in the second direction. The air conditioner according to claim 4.

6. the rail portion has an abutment surface that is connected to an end portion of the opposing surface on the other side in the second direction and faces one side in the second direction, The opposing surface is provided with a protrusion protruding in the first direction, The guide portion is disposed between the abutment surface and the protrusion. The air conditioner according to claim 4.

7. The filter unit includes: A mesh-like filter body with the thickness direction being the vertical direction. A frame body for holding the filter body. The air conditioner according to claim 1.

8. The frame body is sandwiched between the joint portion and the cover in the vertical direction. The air conditioner according to claim 7.

9. The frame has a pair of ribs that protrude upward and extend in a direction perpendicular to the vertical direction, The pair of ribs are disposed on both sides of the filter body in a direction perpendicular to a direction in which the pair of ribs extend when viewed in a vertical direction, The upper end surface of the rib contacts the lower surface of the joint portion. The air conditioner according to claim 8.

10. The frame body has a pair of hook portions aligned in a direction perpendicular to the vertical direction, Each of the pair of hook portions has a leg portion protruding downward and a claw portion protruding in the one direction from the leg portion, The claw portions of the pair of hook portions protrude in different directions from each other, the cover has a pair of holding portions that respectively hold the pair of hook portions, The pair of holding portions are provided with accommodating recesses that are recessed in the one direction and accommodate the claw portions, The inner surface of the accommodating recess has a holding facing surface facing the upper surface of the claw portion. The air conditioner according to any one of claims 7 to 9.

11. One of the pair of holding portions is a first holding portion and the other is a second holding portion, The holding facing surface of the first holding portion is disposed along a horizontal plane perpendicular to a vertical direction, The holding opposing surface of the second holding portion is inclined in an upward direction toward an opening side of the accommodating recess. The air conditioner according to claim 10.

12. the first holding portion is located on one side in the one direction with respect to the second holding portion, The cover has a wall portion located on one side in the one direction with respect to the second holding portion. The air conditioner according to claim 11.