WO2024154171A1 - Air conditioner - Google Patents

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 conditioners

This disclosure relates to air conditioners.

In recent years, air conditioners that maintain a comfortable temperature environment indoors by exchanging heat with indoor air using a heat exchanger inside the indoor unit and supplying it indoors. Such air conditioners only circulate the indoor air using the indoor unit and do not ventilate the air between the indoors and the outside, so if the room remains sealed for a long period of time, the indoor air becomes polluted. For this reason, air conditioners equipped with a ventilation unit that exhausts indoor air to the outside have been disclosed (see, for example, Patent Document 1).

Patent No. 4381048

　In conventional ventilation units, a filter was installed in the piping path, making it impossible to replace or clean the filter. For this reason, there is a demand for air conditioners equipped with a ventilation device that allows the filter to be easily removed.

In light of the above circumstances, the present disclosure aims to provide an air conditioner that allows the filter section to be easily removed.

One embodiment of an air conditioner according to the present disclosure includes 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, a refrigerant pipe that connects the first heat exchanger and the second heat exchanger through a through hole in the wall that separates the room from the outside, and a ventilation device that ventilates the air inside the room, the ventilation device having an intake section that is provided on the underside of the housing and draws in air inside the room, a ventilation fan that is placed outside the room, and a ventilation pipe that connects the intake section and the ventilation fan through the through hole, the intake section having an opening that opens into the room and a joint section that is connected to the tip of the ventilation pipe, a filter section that covers the opening, and a breathable cover that covers the filter section, the cover is removably fixed to the joint section, and the filter section is removably fixed to the cover.

This disclosure provides an air conditioner that allows the filter section to be easily removed.

1 is a schematic diagram showing a schematic configuration of an air conditioner according to an embodiment. 1 is a schematic diagram showing an installation state of an air conditioner according to an embodiment, as viewed from the side. FIG. 1 is a schematic perspective view of an installation state of an air conditioner according to an embodiment. FIG. FIG. 2 is a perspective view of the indoor unit according to the embodiment. FIG. 2 is a schematic diagram showing the inside of the indoor unit of the embodiment. FIG. 2 is an exploded view of the intake section according to the embodiment. FIG. 2 is an exploded view of the intake section according to the embodiment. FIG. 2 is a cross-sectional view of the intake portion of the embodiment. 9 is a cross-sectional view of the filter portion and the cover taken along line IX-IX in FIG. FIG. 2 is a schematic diagram showing the inside of the indoor unit of the embodiment. FIG. 2 is an exploded view of the intake section according to the embodiment.

Below, an embodiment 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 embodiment, and can be modified as desired within the scope of the technical ideas of the present disclosure. In addition, in the following drawings, the scale and numbers of each structure may differ from the scale and numbers of the actual structure in order to make each configuration easier to understand.

The drawings also show the X-axis, Y-axis, and Z-axis as appropriate. The X-axis shows one of the horizontal directions. The Y-axis shows the other of the horizontal directions. The Z-axis shows the vertical direction. In the following description, the horizontal direction along the X-axis is called the "front-rear direction X" or "second direction", the horizontal direction along the Y-axis is called the "left-right direction Y" or "first direction", and the vertical direction is called the "vertical direction Z". The front-rear direction X, the left-right direction Y, and the 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 defined as the upper side, and the opposite side of the vertical direction Z to the side toward which the Z-axis arrow points (-Z direction) is defined as the lower side. In addition, the side of the front-rear direction X toward which the X-axis arrow points (+X direction) is defined as the front side, the one side of the second direction, and the opposite side of the front-rear direction X toward which the X-axis arrow points (-X direction) is defined as the rear side, 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 embodiment. In other words, the side of the left-right direction Y toward which the Y-axis arrow faces (+Y direction) is the left side, 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 faces (-Y direction) is the right side, the other side of the first direction.

<Overall composition>
Fig. 1 is a schematic diagram showing a schematic configuration of an air conditioner 100 in the present embodiment. As shown in Fig. 1, the air conditioner 100 includes an outdoor unit 10, an indoor unit 20, a refrigerant piping 18, and a ventilation device 30. The outdoor unit 10 is disposed outside 7. The indoor unit 20 is disposed inside 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 part of the ventilation device 30 is disposed inside 8, and the other part is disposed outside 7. The ventilation device 30 exhausts air from the room 8 in which the indoor unit 20 is disposed to the outside 7.

The air conditioner 100 is capable of adjusting the temperature of the air in the room 8 in which the indoor unit 20 is located by exchanging heat between the refrigerant 19 flowing in the refrigerant piping 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 or hydrocarbon-based refrigerants that have a low Global Warming Potential (GWP).

The outdoor unit 10 comprises 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.

The compressor 12, heat exchanger 13, flow rate control valve 14, and 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, heat exchanger 13, flow rate control valve 14, and four-way valve 16 are connected by a portion of the refrigerant piping 18 that is located inside the outdoor unit housing 11.

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 the 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.

The indoor unit 20 comprises an indoor unit housing (housing) 21, a heat exchanger 22, a blower 23 as a fan, 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 illustrated diagrammatically in FIG. 1.

When the indoor unit 20 is in cooling operation, the refrigerant 19 flowing through the refrigerant pipes 18 flows in the direction shown by the solid arrows in Figure 1. In other words, when the indoor unit 20 is in cooling operation, the refrigerant 19 flowing through the refrigerant pipes 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. In 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.

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 Figure 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.

<Indoor unit>
2 and 3 are schematic diagrams showing an 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.

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 axis of rotation 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 intake port 20a. The heat exchanger 22 extends in the left-right direction Y.

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 appearance of the indoor unit 20. The outer shell member 21b is a roughly rectangular box shape that opens on the wall surface 9a side. The opening of the outer shell member 21b on the wall surface 9a side is blocked by the air passage member 21d. The air passage member 21d is a member that constitutes part of the air passage through which the air sucked 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.

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 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. Meanwhile, 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.

Air from the room 8 is drawn into the indoor unit housing 21 through the indoor unit suction port 20a by the drive of the blower 23. The air drawn into the indoor unit housing 21 through the indoor unit suction port 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 and right direction Y of the room 8.

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 air direction control vane 25, the heat exchanger 22, etc.

The external shape of the indoor unit housing 21 is a rectangular column 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 intake port 20a is provided on the upper surface 21p. The indoor unit exhaust port 20b is provided on the lower surface 21q.

As shown in FIG. 3, the indoor unit 20 is provided with a drain hose 20d. 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 during cooling to the outside 7.

<Outdoor unit>
The outdoor unit 10 is disposed 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.

As shown in FIG. 3, the outdoor unit 10 and the indoor unit 20 are connected by the refrigerant piping 18 and the first electrical wiring 10e. The refrigerant piping 18 is configured in a loop shape between the outdoor unit 10 and the indoor unit 20. Therefore, the refrigerant piping 18 connects the outdoor unit 10 and the indoor unit 20 with a pair of pipes. The first electrical wiring 10e includes a power 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 piping 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 piping 18 and the first electrical wiring 10e are drawn from the indoor space 8 to the outdoor space 7.

<Ventilation equipment>
The ventilation device 30 is a device that ventilates the room 8 by discharging the air inside the room 8 to the outside 7, and keeps the air inside 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.

The ventilation device 30 has an intake section 32, a ventilation pipe 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 the wall surface 9b of the outdoor room 7. The ventilation pipe 31 extends across the room 8 and the outdoor room 7.

The ventilation device main body 50 has a ventilation fan 51 inside. 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 the air in the room 8 to the outside room 7 through the ventilation pipe 31.

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.

FIG. 4 is a perspective view of the indoor unit 20 of the present 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 FIG. 2) 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. An 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.

FIG. 5 is a schematic diagram showing the inside of the indoor unit 20 of the present embodiment.
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, the drain hose 20d, and the 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 rear surface of the indoor unit 20.

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

The drain hose 20d is connected to a drain pan 20e that is located inside the indoor unit 20 and below the heat exchanger 22. The drain pan 20e has connection parts for 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.

The intake section 32 of the ventilation device 30 is attached to the right end of the indoor unit 20. Therefore, the ventilation pipe 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 pipe 31 passes behind and below the heat exchanger 22.

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 pipes 18 and drain hose 20d are arranged closely together in front of the through hole 9h, making it difficult to secure space to arrange 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 FIG. 5, it is preferable to arrange the suction section 32 at the right end of the indoor unit 20.

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

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. 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.

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 inclines in an upward direction as it moves from the pipe connection portion 61 to the plate connection portion 62, and then inclines in a downward direction. As a result, the curved portion 63 smoothly curves the flow path from the opening 62b to the ventilation pipe 31, suppressing an increase in flow path resistance within the joint pipe 60.

A pipe marker 68 is provided on the outer surface of the curved portion 63. In this embodiment, the pipe marker 68 of the joint pipe 60 is circular. As described below, the pipe marker 68 is used as a marker for the position of the joint pipe relative to the base plate 70.

The base plate 70 is made of a resin material. The base plate 70 is attached to the lower plate 26 of the indoor unit 20. In addition, the joint pipe 60 and the cover 90 are 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.

The plate body 71 is in the form of a plate arranged perpendicular to the vertical direction Z. When viewed from the vertical direction Z, the plate body 71 is rectangular. The plate body 71 is provided with a retaining hole 72h that penetrates the plate body 71 in the vertical direction Z. When viewed from the vertical direction Z, the retaining hole 72h is circular. In the plate body 71, the periphery of the retaining hole 72h is formed in a conical surface shape that rises upward.

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 is referred to as the first base marking 78, and the triangular base marking 79 is referred to as the second base marking 79.

The plate connection part 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 connection part 62. The outer diameter of the fitting rib 62a when viewed from 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 pushing the plate connection part 62 into the retaining hole 72h from above and positioning the fitting rib 62a below the inner edge of the retaining hole 72h.

When assembling the joint pipe 60 and the base plate 70, the assembly worker aligns the position of the pipe mark 68 of the joint pipe 60 with the position of the first base mark 78 of the base plate 70 in the circumferential direction of the retaining hole 72h. This makes it easy to set the direction in which the piping connection portion 61 of the joint pipe 60 extends relative to the base plate 70. In this embodiment, the base plate 70 is provided with two types of base marks 78, 79 of different shapes. Of the two types of base marks 78, 79, the assembly worker selects the first base mark 78, which has a shape that matches the circular pipe mark 68 provided on the joint pipe 60, and aligns the circumferential position with the pipe mark 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 to the extent that the workers can correspond to 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.

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 over 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 area rearward of the left-right edges of the plate body 71. One of the pair of second portions 73d located on the right 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 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 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 therebetween.

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 in the shape of a plate that is 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.

As shown in FIG. 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 part of the lower plate 26 along the slit.

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. The base plate is then moved forward, and 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.

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

As shown in FIG. 7, the pair of side plate portions 76 have symmetrical shapes relative to each other in the left-right direction Y. Below, we will explain the right-side plate portion 76A of the pair of side plate portions 76, and will not explain the left-side plate portion 76B. The left-side side plate portion 76B has the same configuration as the right-side side plate portion 76A, except that it has a shape that is the inverse of the right-side side plate portion 76A in the left-right direction Y.

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

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 connected to the front end of the support surface 75a. The inclined surface 75b inclines downward as it moves forward.

The facing surface 75c is connected to the left edge of the support surface 75a. In this embodiment, the facing surface 75c is perpendicular to the left-right direction Y. The facing surface 75c extends in the front-rear direction X. The facing surface 75c faces to the right. The facing surface 75c provided on the right side plate portion 76B faces to the left. Therefore, the facing 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 facing surface 75c. The protrusion 75d is located near the rear end of the entire length of the facing surface 75c. The protrusion 75d protrudes in the left-right direction Y. The abutment surface 75e is connected to the rear end of the facing surface 75c. The facing surface 75c faces forward.

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

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

FIG. 9 is a cross-sectional view taken along line IX-IX in FIG.
As shown in FIG. 9, the cover plate portion 97 has a plurality of rod-shaped portions 97a that cover a part of the air vent 90h. The rod-shaped portions 97a extend in the left-right direction Y. The rod-shaped portions 97a are arranged in the front-rear direction X. The cross section of the rod-shaped portions 97a is substantially rectangular with the vertical direction Z as the longitudinal direction. The filter portion 80 is disposed above the cover plate portion 97. The rod-shaped portions 97a cover the air vent 90h, thereby protecting the filter portion 80 located above the air vent 90h. The rod-shaped portions 97a are arranged in the front-rear direction X and have a cross section with the vertical direction as the longitudinal direction, so that the filter portion 80 is difficult to see even when observing the suction portion 32 from the front. That is, dust and the like attached to the filter portion 80 is difficult to enter the field of view of the occupant of the room 8.

The cover plate portion 97 also has a pair of holding portions 93A, 93B that hold the filter portion 80. The pair of holding portions 93A, 93B are aligned in the front-rear direction X. The pair of holding portions 93A, 93B are disposed in front of and behind the air vent 90h. The specific configuration and function of the holding portions 93A, 93B will be described in detail later.

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

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.

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.

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.

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

As described above, the front end of the support surface 75a is provided with an inclined surface 75b that inclines downward as it moves forward. 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. Usually, 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 lower surface 21q of the indoor unit 20 is performed from below the joint portion 32a. According to this embodiment, since the inclined surface 75b inclines downward as it moves forward (+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 diagonally below onto the support surface 75a, making it easier to attach the cover 90.

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 larger 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 disposed 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 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, climbing over the protrusion 75d. The worker who attaches the cover 90 to the joint portion 32a feels a clicking sensation the moment the first guide portion 91 is disposed behind the protrusion 75d, and can recognize that the attachment is complete.

As shown in FIG. 9, the first guide portion 91 and the second guide portion 92 are provided with tapered surfaces 91a, 92a at their rear ends, which reduce the protruding height (dimension in the left-right direction Y) 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 can smoothly align the cover 90 with the joint portion 32a in the left-right direction Y. This improves the workability when attaching the cover 90 to the joint portion 32a. The front ends 91b, 92b of the first guide portion 91 and the second guide portion 92 are surfaces that 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 91b a surface perpendicular to the front-rear direction X, when the cover 90 is attached to the joint part 32a, the first guide part 91 is less likely to climb over the protrusion 75d, and the cover 90 can be prevented from coming off the joint part 32a.

As shown in FIG. 6, the filter unit 80 has a filter body 89 and a frame body 81. The filter body 89 is a mesh filter whose thickness direction is 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 flowing into the opening 62b.

The frame body 81 has a pair of first beam portions 81a extending in the front-rear direction X, and a pair of second beam portions 81b extending in the left-right direction Y. The ends of the pair of first beam portions 81a and the pair of second beam portions 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.

The outer shape of the frame body 81 is rectangular when viewed from 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 from the vertical direction Z. The filter body 89 is stretched over the opening window 81w. This allows the frame body 81 to hold the filter body 89.

In this embodiment, the frame 81 holds the filter body 89, so that the frame 81 can apply a stable tension to the filter body 89, and the occurrence of wrinkles in the filter body 89 can be suppressed. Furthermore, when replacing the filter body 89, not only the filter body 89 but the entire filter section 80 is replaced, making the replacement work easier than when the filter body 89 is directly attached to the cover 90.

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 makes it possible to prevent the filter portion 80 from shifting position between the joint portion 32a and the cover 90. Furthermore, since the filter portion 80 can be firmly held between the joint portion 32a and the cover 90, it is possible to prevent the filter portion 80 from vibrating due to the influence of wind passing through the filter body 89 when the ventilation device 30 is operating.

As shown in FIG. 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. Thus, the frame body 81 has a pair of ribs 82 aligned in the left-right direction Y.

FIG. 8 is a cross-sectional view of the suction portion 32 of the present embodiment.
8, the upper end surface 82a of the rib 82 contacts the lower surface 71b of the base plate 70. This realizes a configuration in which the joint portion 32a presses the frame body 81 against the cover 90. Furthermore, the ribs 82 in 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, and it is possible to suppress the occurrence of wrinkles in the filter body 89.

The rear end of the rib 82 is provided with an inclined surface 82b that reduces the protruding height of the rib 82 as it moves rearward. 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, making the attachment work smoother. 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.

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. Thus, the frame body 81 has a pair of hook portions 83 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.

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 as it approaches the tip side of the protruding direction of the claw portion 83b.

The 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 also each have a storage recess 93a, 93b that houses the claw portion 83b of the hook portion 83. The storage recess 93a, 93b is recessed in the front-rear direction X.

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, i.e., 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.

The storage recesses 93a, 93b have holding opposing surfaces 93p, 93q that face downward. The holding opposing surface 93p of the first holding portion 93A is a surface that is arranged along a horizontal plane (X-Y plane). On the other hand, the holding opposing surface 93q of the second holding portion 93B is inclined in an upward direction as it approaches the opening side of the storage recess 93b.

Furthermore, the pair of holding portions 93A, 93B have guide surfaces 93d. The guide surface 93d of the first holding portion 93A is an inclined surface that connects 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 inclines downward as it approaches the front. The guide surface 93d of the second holding portion 93B is an inclined surface that connects 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 inclines downward as it approaches the rear.

When the filter unit 80 is attached to the cover 90, the pair of hook portions 83 are positioned in front of the first holding portion 93A and behind the second holding portion 93B. The claw portion 83b is accommodated in the accommodation recesses 93a and 93b of the pair of holding portions 93A and 93B, respectively. In this state, the lower surface of the claw portion 83b faces 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 surface 83c of the claw portion 83b comes into contact with the opposing holding surfaces 93p and 93q, preventing the upward movement of the filter unit 80. This makes it possible to prevent the filter unit 80 from coming off the cover 90.

To attach the filter unit 80 to the cover 90, the filter unit 80 is moved downward from above the cover 90. This causes the lower surfaces 83d of the pair of claws 83b to come into contact with the guide surfaces 93d of the holding parts 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 is accommodated in the accommodation recesses 93a and 93b.

In order to remove the filter unit 80 from the cover 90, one of the pair of second beams 81b of the filter unit 80, on which the hook portion 83 held by the second holding portion 93B is provided, is lifted upward. Since the holding opposing surface 93q of the second holding portion 93B is an inclined surface, the claw portion 83b accommodated in the second holding portion 93B moves upward while sliding on the holding opposing surface 93q and disengages from the accommodation recess 93b. Even if the claw portion 83b accommodated in the second holding portion 93B moves upward relative to the accommodation recess 93b, the accommodation recess 93a of the first holding portion 93A maintains the state in which the claw portion 83b is accommodated. Therefore, the frame body 81 gradually inclines with the front claw portion 83b as a fulcrum, and the filter unit 80 is moved forward after the claw portion 83b is completely disengaged from the second holding portion 93B, and the filter unit 80 is completely removed from the cover 90.

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

According to this embodiment, the holding opposing surface 93p of the first holding portion 93A is arranged along a horizontal plane (X-Y plane). On the other hand, the holding opposing surface 93q of the second holding portion 93B is inclined in an upward direction toward the opening side of the storage recess 93b. For this reason, the hook portion 83 is difficult to detach from the first holding portion 93A, and is relatively easy to detach from the second holding portion 93B. That is, according to this embodiment, by suppressing the detachment of the hook portion 83 with one holding portion 93A, it is possible to suppress the filter portion 80 from being detached from the cover 90 due to an impact or the like. In this case, even if the hook portion 83 held by the first holding portion 93A is operated, the hook portion 83 is difficult to remove from the first holding portion 93A. According to this embodiment, by making the holding opposing surface 93p of the first holding portion 93A into which the one hook portion 83 not operated by the operator is inserted a surface arranged along a horizontal plane (X-Y plane), it is possible to suppress the difficulty felt by the operator in removing the hook portion 83.

Note that, here, the holding opposing surface 93p being "arranged along a horizontal plane" in the front-rear direction X includes not only the case where the holding opposing surface 93p and the horizontal plane are strictly parallel, but also the case where the holding opposing surface 93p is inclined within a range of ±5° with respect to the horizontal plane.

<Other examples 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.

FIG. 10 is a schematic diagram showing the inside of the indoor unit 20 installed against a different wall surface than that in FIG. 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.

As shown in FIG. 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.

When the through hole 9h opens to the rear of the right end of the indoor unit 20, the refrigerant pipes 18 and drain hoses 20d are arranged closely together in front of the through hole 9h, making it difficult to secure space to arrange 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.

FIG. 11 is an exploded view of the suction section 132 when the suction section 132 is disposed at the left end portion of the indoor unit 20. As shown in FIG.
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 on the left side of the indoor unit 20, compared to when it is disposed on the right side, only the joint pipe 160 is a different member, and the other members can be used in common.

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.

The curved portion 163 connects the pipe connection portion 161 and the plate connection portion 162. The curved portion 163 is inclined downward from the pipe connection portion 161 toward the plate connection portion 162. The pipe connection portion 161 has a flat shape formed by expanding in the front-rear direction X while suppressing the height well. Therefore, the flow path cross section in the curved portion 163 is flat with the front-rear direction X as the longitudinal direction. As shown in FIG. 10, the connection portion between the heat exchanger 22 and the refrigerant pipe 18 is arranged on the left side of the indoor unit 20. Therefore, when the suction portion 132 is arranged 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 arranged on the left side of the indoor unit 20, the joint pipe 160 is made flat, so that the joint pipe 160 can be arranged to avoid the refrigerant pipe 18 while ensuring the flow path cross-sectional area of the joint pipe 160.

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

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 placed, it is easy to attach the selected joint pipe 60, 160 in the correct orientation to the base plate 70.

<Summary>
The air conditioner 100 of this embodiment includes an indoor unit 20, an outdoor unit 10, a refrigerant pipe 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 7, and has a heat exchanger (second heat exchanger) 13. The refrigerant pipe 18 passes through a through hole 9h of the wall 9 that separates the room 8 from the outdoor 7, and connects 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 a ventilation pipe 31. The intake section 32 is provided on the lower surface of the indoor unit housing 21 and draws in the air in the room 8. The ventilation fan 51 is disposed on the outdoor 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 removably fixed to the joint section 32a. The filter section 80 is removably fixed to the cover 90.

According to the above-mentioned configuration, as shown in FIG. 6, the filter unit 80 is provided on the intake section 32 of the ventilation fan 51, so that the filter unit 80 can capture dust and the like contained in the air in the room 8. This can prevent dust and the like from being discharged to the outside 7 together with the exhaust air and causing dirt around the exhaust port. According to the above-mentioned configuration, the filter unit 80 is covered by the cover 90. Therefore, the filter unit 80 is not directly exposed to the room 8, and dust and the like attached to the surface of the filter unit 80 facing the room 8 can be made less visible to the occupants of the room 8. Furthermore, the filter unit 80 can be protected by covering the filter unit 80 with the cover 90. 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 lower surface 21q of the indoor unit 20. Furthermore, since the filter unit 80 is detachable from the cover 90, the filter unit 80 can be easily replaced or cleaned.

In the air conditioner 100 of this embodiment, the indoor unit housing 21 has a lower plate 26 that covers the lower part of the heat exchanger 22. The lower plate 26 has a notch 26c that extends forward from a rear end edge 26a that faces the wall surface 9a. The joint part 32a has a joint pipe 60 that is connected to the end of the ventilation pipe 31, and a base plate 70 that has 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 part 32 of the ventilation device 30 can be attached to the indoor unit 20 by utilizing the notch 26c of the indoor unit housing 21 that is provided to pass the refrigerant pipe 18, etc. Therefore, there is no need to provide a special structure for attaching the suction part 32 to the indoor unit 20, and it is possible to attach the suction part 32 to various types of indoor units 20.

In the air conditioner 100 of this embodiment, as shown in Figures 7 and 11, a plurality of base marks 78, 79 of different shapes are provided on the upper surface 71a of the base plate 70. A pipe mark 68, 169 whose shape matches one of the plurality of base marks 78, 79 is provided on the joint pipe 60, 160. In the above-mentioned configuration, a plurality of joint pipes 60, 160 are prepared, which are appropriately selected according to the layout of the refrigerant pipe 18 and the ventilation pipe 31 in the indoor unit housing 21. According to the above-mentioned configuration, the base mark 78, 79 corresponding to the mounting direction of each joint pipe 60, 160 is attached to the base plate 70. Therefore, regardless of which of the plurality of types of joint pipes 60, 160 is selected, the joint pipe 60, 160 can be easily attached to the base plate 70 in the correct direction. In other words, the installation work of the air conditioner 100 by the installer can be simplified.

In the air conditioner 100 of this embodiment, two directions 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 aligned in the first direction (left-right direction Y) and extending in the second direction (front-rear direction X). The cover 90 has a pair of first guide portions (guide portions) 91 supported by the pair of rail portions 75. The pair of rail portions 75 have a support surface 75a extending in the second direction (front-rear direction X) and supporting the first guide portion 91 from below, and an opposing surface 75c extending in the second direction (front-rear direction X) and opposing the first guide portion 91 in the first direction (left-right direction Y). The opposing surfaces 75c of the pair of rail portions 75 face different directions from each other in the first direction (left-right direction Y). With this configuration, the pair of first guide portions 91 of the cover 90 are supported by the pair of rail portions 75 of the joint portion 32a, so that the cover 90 can be easily attached to and detached from the joint portion 32a by sliding the cover 90 relative to the joint portion 32a.

In the air conditioner 100 of this embodiment, the rail portion 75 has an inclined surface 75b. The inclined surface 75b is connected to the end of the support surface 75a on one side in the second direction (+X direction) and inclines downward (-Z direction) as it moves toward one side in the second direction (+X direction). Usually, the indoor unit 20 is installed in an area of the wall surface 9a of the room 8 close to the ceiling. For this reason, the work of attaching the cover 90 to the joint portion 32a on the lower surface 21q of the indoor unit 20 is performed from below the joint portion 32a. According to the above-mentioned configuration, since 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.

In the air conditioner 100 of this embodiment, the rail portion 75 has an abutment surface 75e that is connected 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). A protrusion 75d that protrudes in the first direction (left-right direction Y) is provided on the opposing surface 75c. The first guide portion 91 is disposed between the abutment surface 75e and the protrusion 75d. According to 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. For this reason, even if vibration or impact is applied to the indoor unit 20, the cover 90 is unlikely to come off from the joint portion 32a. Furthermore, when the cover 90 is attached to the joint portion 32a, the first guide portion 91 climbs 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 protrusion 75d, and knows that attachment is complete.

In the air conditioner 100 of this embodiment, the filter section 80 has a mesh-like filter body 89 and a frame body 81. The filter body 89 has a thickness direction that is vertical. The frame body 81 holds the filter body 89. With this configuration, the frame body 81 holds the filter body 89, so that a stable tension can be applied to the filter body 89, and the occurrence of wrinkles in the filter body 89 can be suppressed. Furthermore, when replacing the filter body 89, the entire filter section 80 can be replaced, making the replacement work easier.

In the air conditioner 100 of this embodiment, the frame 81 is sandwiched between the joint part 32a and the cover 90 in the vertical direction Z. This configuration can prevent the filter part 80 from shifting position between the joint part 32a and the cover 90. Furthermore, it can prevent vibrations from occurring in the filter part 80 when the ventilation device 30 is in operation, and can prevent dust and the like from falling from the filter part 80.

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 (front-back direction X in this embodiment). 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 (left-right direction Y in this embodiment) as viewed from the vertical direction Z. The upper end surface 82a of the rib 82 contacts the lower surface 71b of the joint portion 32a. According to the above-mentioned configuration, the pair of ribs 82 are arranged on both sides of the filter body 89 in the left-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-right direction Y. This makes it less likely that wrinkles will occur in the filter body 89.

In the air conditioner 100 of this embodiment, the frame 81 has a pair of hook portions 83 aligned in one direction (front-to-back 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 (front-to-back 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 accommodating recesses 93a, 93b that are recessed in one direction (front-to-back direction X) and accommodate the claw portions 83b. The inner surfaces of the accommodating recesses 93a, 93b have holding opposing surfaces 93p, 93q that face the upper surface 83c of the claw portion 83b. With this configuration, the filter part 80 can be fixed to the cover 90 with a simple structure of the hook part 83 and the holding parts 93A and 93B. This makes it easy to attach and detach the filter part 80 to and from the cover 90.

In the air conditioner 100 of this embodiment, one of the pair of holding portions 93A, 93B is designated as the first holding portion 93A, and the other is designated as the second holding portion 93B. The holding opposing surface 93p of the first holding portion 93A is arranged along a horizontal plane perpendicular to the vertical direction Z. The holding opposing surface 93q of the second holding portion 93B is inclined in an upward direction as it approaches the opening side of the accommodating recess 93b. According to this configuration, by arranging the holding opposing surface 93p of the first holding portion 93A along a horizontal plane, it is possible to make it difficult for the claw portion 83b to come off the first holding portion 93A. On the other hand, by making the holding opposing surface 93q of the second holding portion 93B an inclined surface as described above, it is possible to make it easier to remove the claw portion 83b from the second holding portion 93B. This makes it possible to realize a structure 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 coming off the cover 90.

In the air conditioner 100 of this embodiment, the first holding portion 93A is located on one side in one direction (+X direction) relative to the second holding portion 93B. The cover 90 has a front wall portion 99 located on one side in one direction (+X direction) relative to 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 level 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.

Although the embodiments of this disclosure have been described above, this disclosure is not limited to the configurations of the above-mentioned embodiments.

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 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 mark, 80...filter part, 81...frame body, 82...rib, 82a...upper end surface, 83...hook part, 83a...leg part, 83b...claw part, 89...filter body, 90...cover, 91...first guide part (guide part), 93a, 93b...accommodation recess, 93p, 93q...holding opposing surface, 93A...first holding part (holding part), 93B...second holding part (holding part), 100...air conditioner, Z...vertical direction, X...front-rear direction (second direction), Y...left-right direction (first direction)

Claims (12)

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 are
   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 any one of claims 1 to 3.
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.
   6. The air conditioner according to claim 4 or 5.
7. The filter unit includes:
   The filter includes a mesh-like filter body having a thickness direction in the vertical direction, and a frame body that holds the filter body.
   An air conditioner according to any one of claims 1 to 6.
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.

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