Air conditioner

Abstract

Provided is an air conditioner comprising an indoor unit, an outdoor unit, a refrigerant pipe, and a ventilation device, the ventilation device comprising a ventilation pipe leading from indoors to outdoors through a through-hole, and a ventilation device body that is fixed to an outdoor wall surface, the ventilation device body having a ventilation fan, an air intake duct joining the ventilation pipe and the ventilation fan, and an exhaust air duct joining the ventilation fan and an exhaust port, the ventilation fan having a fan intake port joined to the air intake duct, and a fan exhaust port joined to the exhaust air duct, two directions orthogonal to the vertical direction and orthogonal to each other being a first direction and a second direction, the air intake duct having an inflow port that opens upward and is connected to the ventilation pipe, a first region extending downward from the inflow port, a chamber region joined to the first region and extending in the first direction, a second region positioned on one side of the first region in the first direction and extending upward from the chamber region, and an outflow port that is positioned in an upper end part of the second region and joined to the fan intake port, and the exhaust air duct extending downward from the fan exhaust port.

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. 3570260

[0004] To ensure quietness inside the room, it is preferable to place the ventilation fan of the ventilation system outdoors. In this case, for example, when the heater is turned on in winter, the air in the ventilation pipe connecting the room and the ventilation fan is cooled by the outside air, causing condensation inside the ventilation pipe. For this reason, the ventilation system is required to have a structure that prevents condensation from entering the ventilation fan.

[0005] In view of the above circumstances, the present disclosure has an object to provide an air conditioner that can prevent condensation water from entering a ventilation fan.

[0006] One aspect of an air conditioner according to the present disclosure includes an indoor unit installed indoors and having a first heat exchanger, an outdoor unit installed outdoors and having a second heat exchanger, refrigerant piping that passes through a through-hole in a wall separating the indoor space from the outdoors and connects the first heat exchanger and the second heat exchanger, and a ventilation device that discharges indoor air to the outdoors through an exhaust port, wherein the ventilation device includes ventilation piping that passes from the indoor space to the outdoors through the through-hole, and a ventilation device main body fixed to a wall surface outdoors, and the ventilation device main body includes a ventilation fan, an intake air duct that connects the ventilation piping and the ventilation fan, and an exhaust air duct that connects the ventilation fan and the exhaust port. the ventilation fan has a fan inlet connected to the intake air duct and a fan exhaust outlet connected to the exhaust air duct, and two directions that are perpendicular to the vertical direction and perpendicular to each other are defined as a first direction and a second direction, the intake air duct has an inlet that opens upward and is connected to the ventilation piping, a first region that extends downward from the inlet, a chamber region that is connected to the first region and extends in the first direction, a second region that is located on one side of the first region in the first direction and extends upward from the chamber region, and an outlet that is located at the upper end of the second region and is connected to the fan inlet, and the exhaust air duct extends downward from the fan exhaust port.

[0007] According to the present disclosure, it is possible to provide an air conditioner that can suppress the intrusion of condensation water into a ventilation fan.

[0008] 9 is a schematic diagram showing a general configuration of an air conditioner according to an embodiment. FIG. 9 is a schematic diagram showing the installation state of an air conditioner according to an embodiment as seen from the side and a schematic diagram showing the installation state of an air conditioner according to an embodiment as seen from an oblique direction. FIG. 9 is a perspective view of a ventilation device main body according to an embodiment. FIG. 9 is an exploded view of a ventilation device main body according to an embodiment. FIG. 9 is an exploded view of an air duct unit according to an embodiment. FIG. 9 is a front view of a ventilation fan according to an embodiment. FIG. 9 is a perspective view of an intake airway member according to an embodiment. FIG. 9 is a front view of an intake airway member according to an embodiment. FIG. 9 is a cross-sectional view of an intake airway member along line X-X in FIG. 9. FIG. 9 is a schematic diagram showing the wiring configuration of an air conditioner according to a first modification. FIG. 9 is a schematic diagram showing the wiring configuration of an air conditioner according to a second modification. FIG. 9 is a schematic diagram showing the wiring configuration of an air conditioner according to a third modification. FIG. 9 is a schematic diagram showing the wiring configuration of an air conditioner according to a fourth modification.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present disclosure. In addition, in the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure in order to make each configuration easier to understand.

[0010] The drawings also show the X-axis, Y-axis, and Z-axis as appropriate. The X-axis indicates one of the horizontal directions. The Y-axis indicates the other of the horizontal directions. The Z-axis indicates the vertical direction. In the following description, the horizontal direction along the X-axis is referred to as the "front-rear direction X," the horizontal direction along the Y-axis is referred to as the "left-right direction Y," and the vertical direction is referred to as the "vertical direction Z." The front-rear direction X, left-right direction Y, and vertical direction Z are perpendicular to each other. In the following description, the side of the vertical direction Z toward which the Z-axis arrow points (+Z direction) is referred to as the upside, and the side of the vertical direction Z opposite to the side toward which the Z-axis arrow points (-Z direction) is referred to as the downside. Furthermore, the side of the front-rear direction X toward which the X-axis arrow points (+X direction) is referred to as the front, and the side of the front-rear direction X opposite to the side toward which the X-axis arrow points (-X direction) is referred to as the rear. In addition, the side of the left-right direction Y toward which the Y-axis arrow points (+Y direction) is defined as the left, and the side opposite to the side toward which the Y-axis arrow points (-Y direction) is defined as the right.

[0011] <Overall Configuration> Fig. 1 is a schematic diagram showing the overall 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, a circulation path section (refrigerant piping) 18, and a ventilation device 30. The outdoor unit 10 is disposed outdoors 7. The indoor unit 20 is disposed indoors 8. The outdoor unit 10 and the indoor unit 20 are connected to each other by a circulation path section 18 through which a refrigerant 19 circulates. A portion of the ventilation device 30 is disposed indoors 8, and another portion is disposed outdoors 7. The ventilation device 30 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 in the circulation path portion 18 and the air in the room 8 in which the indoor unit 20 is located. Examples of the refrigerant 19 include fluorine-based refrigerants and hydrocarbon-based refrigerants, which have a low global warming potential (GWP).

[0013] The outdoor unit 10 includes an outdoor unit housing 11, a compressor 12, a heat exchanger 13, a flow 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 adjustment valve 14, and the four-way valve 16 are provided in a portion of the circulation path 18 that is located inside the outdoor unit housing 11. The compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, and the four-way valve 16 are connected by a portion of the circulation path 18 that is located inside the outdoor unit housing 11.

[0015] The four-way valve 16 is provided in a portion of the circulation path section 18 that is connected to the discharge side of the compressor 12. The four-way valve 16 can reverse the direction of the refrigerant 19 flowing through the circulation path section 18 by switching a portion of the path of the circulation path section 18. When the path connected by the four-way valve 16 is the path shown by the solid line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the solid arrow in Fig. 1. On the other hand, when the path connected by the four-way valve 16 is the path shown by the dashed line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the dashed arrow in Fig. 1.

[0016] The indoor unit 20 includes an indoor unit housing 21, a heat exchanger 22, a blower 23 as a blower, and a control unit 24. The indoor unit housing 21 houses the heat exchanger 22, the blower 23, and the control unit 24. 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 in FIG. 1 .

[0017] When the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the solid arrow in Fig. 1. In other words, when the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow control valve 14, and the heat exchanger 22 of the indoor unit 20 in that order, before returning to the compressor 12. During cooling operation, the heat exchanger 13 in the outdoor unit 10 functions as a condenser, and the heat exchanger 22 in the indoor unit 20 functions as an evaporator.

[0018] On the other hand, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the dashed line in Fig. 1. In other words, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow control valve 14, and the heat exchanger 13 of the outdoor unit 10 in that order, before returning to the compressor 12. In heating operation, the heat exchanger 13 in the outdoor unit 10 functions as an evaporator, and the heat exchanger 22 in the indoor unit 20 functions as a condenser.

[0019] 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 circulation path 18 and a second electric wire 42. The circulation path 18 is configured in a loop shape between the outdoor unit 10 and the indoor unit 20. Therefore, the circulation path 18 connects the outdoor unit 10 and the indoor unit 20 with a pair of pipes. The second electric wire 42 includes a power supply line that supplies power to the outdoor unit 10 via the indoor unit 20, and a signal line for controlling the outdoor unit 10 and the indoor unit 20 in cooperation with each other. The circulation path 18 and the second electric wire 42 pass through a through-hole 9h provided in the wall 9 that separates the indoor space 8 from the outdoor space 7. As a result, the circulation path 18 and the second electric wire 42 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 a ventilation intake section 32, ventilation piping 31, and a ventilation device main body 50. The ventilation intake section 32 is attached to the indoor unit 20 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 indoor room 8 and the outdoor room 7.

[0031] The ventilation intake section 32 draws in air from the room 8. The ventilation intake section 32 is provided on the surface of the indoor unit housing 21. In this embodiment, the ventilation intake section 32 is arranged on the underside 21q of the indoor unit housing 21, away from the wall surface of the room 8. This prevents the airflow of the air flowing into the ventilation intake section 32 from flowing along the wall surface, and prevents dirt from adhering to the wall surface of the room 8.

[0032] Of the surfaces of the indoor unit housing 21, the surface on which the ventilation intake section 32 is provided and the surface on which the indoor unit air inlet 20a is provided face in different directions. This prevents the negative pressures at the time of intake from affecting each other. This ensures that the flow rate of air flowing into the indoor unit 20 and the flow rate of air flowing into the ventilation device 30 are both sufficient, allowing the cooling or heating function of the indoor unit 20 and the ventilation function of the ventilation device 30 to be fully utilized.

[0033] The ventilation pipe 31 is a tubular pipe. The ventilation pipe 31 connects the ventilation device main body 50 and the ventilation intake section 32. Therefore, one end of the ventilation pipe 31 is located inside the room 8, and the other end is located outside the room 7. The ventilation pipe 31 passes through the inside of the indoor unit housing 21 and the through-hole 9h in the wall 9, and is drawn out to the outside the room 7.

[0034] Fig. 4 is a perspective view of the ventilation device main body 50. Fig. 5 is an exploded view of the ventilation device main body 50. As shown in Fig. 5, the ventilation device main body 50 has a mounting plate 70, an air duct unit 50a, and a case 40.

[0035] In the following description of the ventilation device main body 50, the direction perpendicular to the wall surface 9b on which the ventilation device main body 50 is attached is the front-rear direction X, or the second direction, and the direction perpendicular to the vertical direction Z and the front-rear direction is the left-right direction Y, or the first direction. Furthermore, in the following description, the direction perpendicular to the wall surface 9b, away from the wall surface 9b, is referred to as the forward (+X direction) or one side of the second direction, and the direction approaching the wall surface 9b is referred to as the rear (-X direction) or the other side of the second direction. Furthermore, in the following description of the ventilation device main body 50, left and right are defined based on the posture of the observer facing forward (+X direction). That is, the left-hand side of an observer facing the opposite side (+X direction) of the wall surface 9b is referred to as the left (+Y direction) or the other side of the first direction, and the right-hand side is referred to as the right (-Y direction) or one side of the first direction. In this embodiment, the left-right direction Y of the ventilation device main body 50 and the left-right direction of the outdoor unit 10 coincide with each other, but these left-right directions Y do not necessarily have to coincide with each other.

[0036] The mounting plate 70 is a plate-shaped member made of sheet metal. The mounting plate 70 is arranged along the wall surface 9b of the outdoor unit 7. The mounting plate 70 is fastened to the wall surface 9b with screws. The air duct unit 50a and the case 40 are also fixed to the mounting plate 70.

[0037] The case 40 is box-shaped and opens to the rear. The rear opening of the case 40 is covered by a mounting plate 70. The air-duct unit 50a is disposed in the space surrounded by the case 40 and the mounting plate 70. The case 40 protects the air-duct unit 50a from wind and rain.

[0038] An exhaust port 46a is provided in the case 40. The exhaust port 46a faces the lower end of the air-path unit 50a in the vertical direction Z and blows out air from the air-path unit 50a downward. The exhaust port 46a opens to a lower surface 46b of the case 40. Therefore, the exhaust port 46a faces downward, and can prevent rainwater from entering the interior of the ventilation device main body 50 through the exhaust port 46a.

[0039] In this embodiment, the exhaust port 46a is positioned on the underside 46b of the case 40, biased in a direction away from the wall surface 9b. This prevents the exhaust air blown out from the exhaust port 46a from contaminating the wall surface 9b or causing deterioration of the wall surface 9b.

[0040] The exhaust port 46a is covered with a mesh-like grill G. The grill G is, for example, a metal wire mesh. The grill G prevents living organisms or foreign objects from entering the inside of the ventilation device main body 50 through the exhaust port 46a.

[0041] 6 is an exploded view of the air passage unit 50a. As shown in FIG. 6, the air passage unit 50a has an intake air passage member 60, a separator 69, a ventilation fan 51, and an exhaust air passage member 65.

[0042] An intake airflow path 80 is provided inside the intake airflow path member 60. The exhaust airflow path member 65 has an inlet 81 and an outlet 85. The inlet 81 is connected to the ventilation pipe 31 (see FIG. 3 ). The outlet 85 opens forward (in the +X direction). The outlet 85 faces the ventilation fan 51. The intake airflow path 80 extends from the inlet 81 to the outlet 85.

[0043] The separator 69 is a plate-shaped member disposed perpendicular to the front-rear direction X. The intake airflow path member 60 is disposed behind the separator 69 (in the -X direction). The ventilation fan 51 and the exhaust airflow path member 65 are disposed in front of the separator 69 (in the +X direction). The separator 69 is provided with a through-hole 69h that penetrates the separator 69 in the thickness direction. The through-hole 69h overlaps with the opening of the outlet 85 of the intake airflow path member 60.

[0044] 7 is a front view of ventilation fan 51. Ventilation fan 51 has a cylindrical impeller 51a centered on a central axis O extending in the front-rear direction X, a fan motor 51b that rotates impeller 51a, and a fan box 59 that houses impeller 51a and fan motor 51b. Ventilation fan 51 in this embodiment is a centrifugal blower.

[0045] The impeller 51a has a main plate 51c and a plurality of blades 51w. The main plate 51c is a circular plate with a central axis O as its central axis. The main plate 51c has a boss 51d at its center that protrudes to one axial side of the central axis O. The fan motor 51b is disposed inside a recess located on the other axial side of the boss 51d. The plurality of blades 51w extend to one axial side from the surface on one axial side of the main plate 51c. The plurality of blades 51w are arranged at equal intervals circumferentially about the central axis O along the outer edge of the main plate 51c. As the impeller 51a rotates about the central axis O, it sends air from the inner diameter side to the outer diameter side of the impeller 51a.

[0046] The fan box 59 has a spiral casing 59c in which the impeller 51a and the fan motor 51b are disposed. The spiral casing 59c has a spiral shape whose radial dimension increases from one side to the other in the circumferential direction of the central axis O. The spiral casing 59c is provided with a fan inlet 59a connected to the intake airflow duct 80 and a fan exhaust outlet 59b connected to the exhaust airflow duct 90. The fan inlet 59a is circular, centered on the central axis O, and opens rearward (in the -X direction). The fan inlet 59a is connected to the outlet 85 of the intake airflow duct member 60 via a through-hole 69h in the separator 69. The fan exhaust outlet 59b opens downward (in the -Z direction). The ventilation fan 51 draws air from the rearward (in the -X direction) through the fan inlet 59a and blows it downward (in the -Z direction) through the fan exhaust outlet 59b.

[0047] As shown in FIG. 6 , the exhaust airflow passage member 65 is provided with an exhaust airflow passage 90. The exhaust airflow passage member 65 has a pair of side walls 65a located on both sides of the exhaust airflow passage 90 in the left-right direction Y and extending in the vertical direction Z, and a front wall 65b located forward of the exhaust airflow passage 90. The front wall 65b connects the front (+X direction) edges of the pair of side walls 65a. The front wall 65b faces the separator 69 in the front-rear direction X. The exhaust airflow passage 90 is formed in a space surrounded by the pair of side walls 65a, the front wall 65b, and the separator 69. The exhaust airflow passage 90 extends in the front-rear direction X.

[0048] In this specification, the expression "extending in a specific direction" means that the direction in which the object (or space) extends has a component in that specific direction over its entire length, and is not to be interpreted in a restrictive sense as being parallel to that specific direction over its entire length.

[0049] <Intake airflow duct> Next, the specific configuration of the intake airflow duct 80 will be described. Fig. 8 is a perspective view of the intake airflow duct member 60. Fig. 9 is a front view of the intake airflow duct member 60. Fig. 10 is a cross-sectional view of the intake airflow duct member 60 taken along line X-X in Fig. 9. Fig. 9 also shows how the cross sections of each region in the intake airflow duct 80 (the inlet 81, the first straight portion 82a, the first bend portion 82b, the chamber region 83, and the connection portion 87) change.

[0050] As shown in Figure 9, the intake airflow duct 80 is formed in a U-shape when viewed from the front-to-rear direction X. The intake airflow duct 80 has an inlet 81, a first region 82, a chamber region 83, a second region 84, and an outlet 85. Air flowing into the intake airflow duct 80 flows through the intake airflow duct 80 in the order of the inlet 81, the first region 82, the chamber region 83, and the second region 84. Hereinafter, the position of each part of each region may be described using the terms "upstream" or "downstream" relative to the flow of air through the intake airflow duct 80.

[0051] The inlet 81 has a cylindrical shape extending in the vertical direction Z. The inlet 81 opens upward. The ventilation pipe 31 is connected to the inlet 81. Air flows into the inlet 81 from the ventilation pipe 31. The cross section of the flow path of the inlet 81 is circular. Here, the "cross section of the flow path" means a cross section in a direction perpendicular to the flow of air in the air duct. In addition, in this specification, the term "circular shape" is interpreted to include not only a circle in the strict sense but also an elliptical shape.

[0052] The first region 82 extends downward from the inlet 81. The first region 82 has a first linear portion 82a and a first bent portion 82b. The first linear portion 82a extends linearly in the vertical direction Z. That is, the first linear portion 82a extends linearly downward from the lower end of the inlet 81. The cross-sectional shape of the first linear portion 82a is rectangular with its short side extending in the front-to-rear direction X. The cross-sectional shape of the first linear portion 82a may also continuously change from the circular cross-sectional shape of the inlet 81 to a rectangular shape. The cross-sectional area of ​​the first linear portion 82a increases continuously downward. The cross-sectional area of ​​the first linear portion 82a is smallest at the upper end and largest at the lower end. Note that in this specification, a rectangular shape does not include a square with four sides of the same length, and also includes a shape with rounded corners at the intersections of the long and short sides.

[0053] The first bent portion 82b bends to the right (-Y direction) as it moves downward from the lower end of the first straight portion 82a. The first bent portion 82b connects to the left (+Y direction) end of the chamber region 83. The cross-sectional shape of the flow path of the first bent portion 82b is rectangular with its short side extending in the front-to-rear direction X. The cross-sectional area of ​​the flow path of the first bent portion 82b increases continuously as it moves downward. The cross-sectional area of ​​the flow path of the first bent portion 82b is smallest at the upper end and largest at the connection portion 86 with the chamber region 83, which is the downstream end.

[0054] The chamber region 83 connects the downstream end of the first region 82 and the upstream end of the second region 84. The chamber region 83 is a region that reverses the flow direction of air in the intake airflow path 80. The chamber region 83 also has the function of temporarily storing air in the intake airflow path 80 to stabilize the pressure.

[0055] The chamber region 83 has a rectangular cross-sectional shape with its short sides extending in the front-rear direction X and extends in the left-right direction Y. That is, in this embodiment, the cross-sectional area of ​​the chamber region 83 in a cross section perpendicular to the left-right direction Y is approximately uniform over the entire length in the left-right direction Y. However, the cross-sectional area of ​​the chamber region 83 may vary in part in the left-right direction Y as long as a sufficient volume for storing air is ensured.

[0056] In a typical air passage, a circular air passage shape can minimize air passage resistance. In contrast, the chamber region 83 of this embodiment not only functions as an air passage but also functions to stabilize pressure by accumulating air therein. Because the chamber region 83 gently regulates the air flow within it, a rectangular cross-sectional shape of the flow passage of the chamber region 83 does not result in significant energy loss. Furthermore, by shaping the cross-sectional shape of the flow passage of the chamber region 83 into a rectangular shape with the short side extending in the front-rear direction X, the chamber region 83 can accumulate more air within the limited space in the front-rear direction X. This further stabilizes the pressure within the chamber region 83. The first region 82, connected upstream of the chamber region 83, is also continuously connected to the chamber region 83, and therefore also plays a role in stabilizing pressure. Therefore, by shaping the cross-sectional shape of the flow passage of the first region 82 into a rectangular shape, more air can be accumulated within the first region 82.

[0057] A connection portion 86 between the chamber region 83 and the first region 82 is located at the left end (+Y direction) of the chamber region 83. On the other hand, a connection portion 87 between the chamber region 83 and the second region 84 is located to the left (+Y direction) of an end portion 83c on the right (-Y direction) of the chamber region 83. The chamber region 83 has a stagnation portion 83d that extends to the right of the connection portion 87 with the second region 84. The stagnation portion 83d extends to the right (-Y direction) of the connection portion 87 with the second region 84.

[0058] By providing the stagnation section 83d in the chamber region 83, the air that flows from the first region 82 into the chamber region 83 and flows along the outer wall surface stagnates in the stagnation section 83d and does not flow directly into the second region 84. This makes it possible to slow the flow of air in the chamber region 83 and stabilize the pressure in the chamber region 83.

[0059] A drain hole 63h is provided in the bottom 63 of the air intake airway member 60, which is located below the chamber region 83. The drain hole 63h is located below the air intake airway 80. The drain hole 63h extends in the vertical direction Z. The drain hole 63h extends downward from the chamber region 83 to connect the air intake airway 80 to the outside space. A drain valve (not shown) is disposed below the drain hole 63h.

[0060] In this embodiment, the ventilation piping 31 and the ventilation device main body 50 are disposed outside the room 7. When the ventilation device 30 is operated while the air conditioner 100 is heating the room, for example in winter, heated air from the room 8 passes through the ventilation piping 31 and the ventilation device main body 50. This air is cooled by the outside air, causing condensation to form inside the ventilation piping 31 and the ventilation device main body 50. The condensed water accumulates at the lower end of the chamber region 83 of the intake air duct 80. The condensed water inside the intake air duct 80 is drained to the outside through the drain hole 63h.

[0061] The second region 84 extends upward from the chamber region 83. The first region 82 and the second region 84 extend substantially parallel to each other when viewed in the front-rear direction X. The second region 84 is located to the right (in the −Y direction) of the first region 82.

[0062] The second region 84 has a second linear portion 84a and a second bent portion 84b. The second linear portion 84a extends linearly upward from a connection portion 87 with the chamber region 83. The cross-sectional shape of the second linear portion 84a is circular. In particular, the cross-sectional shape of the flow path at the lower end of the second linear portion 84a (i.e., the connection portion 87 with the chamber region 83) is elliptical with its minor axis extending in the front-to-rear direction X. The cross-sectional shape of the second linear portion 84a changes from an ellipse to a perfect circle as it extends upward from the connection portion 87. The cross-sectional area of ​​the second linear portion 84a continuously increases as it extends upward from the connection portion 87. The cross-sectional area of ​​the second linear portion 84a is smallest at the lower end and largest at the upper end.

[0063] In this embodiment, the flow path cross-sectional area of ​​the connection portion 87 at the lower end of the second region 84 is smaller than the flow path cross-sectional area of ​​the chamber region 83 (cross-sectional area in a cross section perpendicular to the left-right direction Y). By making the flow path cross-sectional area of ​​the lower end of the second region 84 sufficiently small, it is possible to reduce the distribution of wind speed within the flow path cross-section. This allows the air to be rectified within the second region 84, and the efficiency of air suction by the ventilation fan 51 to be improved. Furthermore, by making the flow path cross-sectional shape of the second region 84 circular, it is possible to reduce air path resistance in the second region 84. This allows the efficiency of air suction by the ventilation fan 51 from the intake air path 80 to be improved.

[0064] In the present embodiment, the cross-sectional shape of the second straight portion 84a at the connection portion 87 is an ellipse with its minor axis extending in the front-rear direction X. This allows the dimension of the second region 84 at the connection portion 87 in the front-rear direction X to be reduced, and as a result, the size of the ventilation device main body 50 in the front-rear direction X can be reduced. Note that, if there is ample room in the dimension in the front-rear direction X, it is more preferable from the standpoint of airway resistance that the cross-sectional shape of the second straight portion 84a be a perfect circle over its entire length.

[0065] The flow path cross-sectional area of ​​the second straight portion 84a continuously increases upward. Therefore, the air velocity gradually decreases as the air approaches the fan intake port 59a of the ventilation fan 51. According to this embodiment, a uniform flow with a high velocity is formed at the connection portion 87 with the chamber region 83, while the air velocity is reduced during intake by the ventilation fan 51, allowing stable intake from the ventilation fan 51. In addition, reducing the velocity on the downstream side of the second straight portion 84a makes it easier to suppress the occurrence of turbulence at the second bent portion 84b connected to the downstream side of the second straight portion 84a.

[0066] As shown in Figure 10, the second bent portion 84b bends forward (in the +X direction) as it extends upward from the upper end of the second straight portion 84a. The second bent portion 84b is connected to the outlet 85. The cross-sectional shape of the flow path of the second bent portion 84b is circular. The cross-sectional area of ​​the flow path of the second bent portion 84b increases continuously toward the downstream side. The cross-sectional area of ​​the flow path of the second bent portion 84b is smallest at the lower end and largest at the outlet 85, which is the downstream end.

[0067] The stator blade 62 is provided at the second bent portion 84b. The stator blade 62 has a uniform cross-sectional shape and extends in the front-rear direction X. The stator blade 62 is plate-shaped and has an upper surface 62a facing upward and a lower surface 62b facing downward.

[0068] Here, of the inner wall surface of the intake airflow path member 60 that constitutes the second bend 84b, the portion that faces the connection portion 87 between the second region 84 and the chamber region 83 in the vertical direction Z is referred to as the outer corner wall surface 63a. Also, the inner wall surface that faces the outer corner wall surface 63a in the normal direction of the outer corner wall surface 63a is referred to as the inner corner wall surface 63b. The upper surface 62a of the stator blade 62 faces the outer corner wall surface 63a in the vertical direction Z. The lower surface 62b of the stator blade 62 faces the inner corner wall surface 63b in the vertical direction Z.

[0069] The stator vane 62 divides the flow passage cross section of the second bent portion 84b into two regions, an upper region and an lower region. Of the regions divided by the stator vane 62, the upper region is called the outer corner region 84c, and the lower region is called the inner corner region 84d. That is, the second bent portion 84b is provided with the outer corner region 84c and the inner corner region 84d. The outer corner region 84c is located between the outer corner wall surface 63a and the upper surface 62a of the stator vane 62. The inner corner region 84d is located between the inner corner wall surface 63b and the lower surface 62b of the stator vane 62.

[0070] The flow direction of air in the intake airflow duct 80 changes by approximately 90° at the second bend 84b. The air pressure increases near the outer corner wall surface 63a and decreases near the inner corner wall surface 63b. Therefore, air flowing along the inner corner wall surface 63b is likely to separate from the inner corner wall surface 63b. Air flowing through the second bend 84b is likely to generate turbulence near the inner corner wall surface 63b.

[0071] According to this embodiment, the provision of the stator vane 62 at the second bend 84b ensures that air passes through the inner corner region 84d. This makes it difficult for pressure to drop near the inner corner region 84d, and prevents air from separating from the inner corner wall surface 63b. Furthermore, the stable flow of air into the inner corner region 84d prevents air pressure from increasing in the outer corner region 84c, thereby making it possible to uniform the air volume across the flow path cross section of the outlet 85.

[0072] 9 , the stator vane 62 has an upwardly convex curved shape with a central portion 62m in the left-right direction Y as an apex when viewed from the front-rear direction X. The stator vane 62 extends with an inclination downward from the central portion 62m toward both sides in the left-right direction. In this embodiment, the central portion 62m as an apex is located slightly below the center point of the outlet in the vertical direction Z when viewed from the front-rear direction.

[0073] By forming the stator vane 62 in an upwardly convex curved shape with the central portion 62m as an apex, more air is guided to the inner corner region 84d near the center in the left-right direction Y. Because separation is most likely to occur on the inner corner wall surface 63b at the center in the left-right direction Y, sending more air to the center of the inner corner region 84d can effectively prevent air from separating from the inner corner wall surface 63b.

[0074] Furthermore, by forming the stator vane 62 in an upwardly convex curved shape with the central portion 62m as an apex, the length of the outer corner region 84c in the vertical direction Z becomes nearly uniform throughout the left-right direction Y. This makes it possible to make the volume of air flowing through the outer corner region 84c nearly uniform in the left-right direction Y, thereby resulting in a uniform air volume in the flow path cross section of the outlet 85. Note that it is preferable that the curved shape of the stator vane 62 as viewed from the fore-aft direction X be a circular arc shape. In this case, the effect of uniforming the air volume at the outlet 85 can be enhanced.

[0075] Note that the "central portion 62m of the stator blade 62" does not strictly refer to the center position of the stator blade 62 in the left-right direction Y, but refers to an intermediate region having a width between the left end and the right end of the stator blade 62. In other words, the apex of the stator blade 62 does not necessarily have to be located at the center position in the left-right direction Y, and may be located offset in the left-right direction Y. Note that in this embodiment, since the second region 84 has a left-right symmetrical shape when viewed from the front-rear direction, it is most preferable that the apex of the stator blade 62 be located at the center position in the left-right direction.

[0076] 10 , the forward end 62c of the stator vane 62 is located rearward (in the −X direction) of the fan intake 59a. In the outer corner region 84c of the second bend 84b, air may separate from the upper surface 62a of the stator vane 62, causing slight turbulence T. If this turbulence T reaches the inside of the ventilation fan 51, it may vibrate the impeller of the ventilation fan 51 and result in noise. According to this embodiment, the stator vane 62 does not protrude into the interior of the ventilation fan 51, and therefore, the turbulence T caused by separation from the upper surface 62a of the stator vane 62 is less likely to reach the inside of the ventilation fan 51, thereby suppressing noise generation from the ventilation fan 51.

[0077] Furthermore, the rear end 62d of the stator vane 62 is located forward (in the +X direction) of the center line CL of the second region 84 in the longitudinal direction X. If the stator vane 62 were extended too far rearward (in the -X direction), the amount of air flowing from the second straight portion 84a into the inner corner region 84d would be too large, resulting in uneven air flow in the flow path cross section of the outlet 85. By locating the rear end 62d of the stator vane 62 forward of the center line CL, it is possible to equalize the amount of air flowing in the outer corner region 84c and the inner corner region 84d. Note that the center line CL of the second region 84 here refers to the line connecting the centers of the flow path cross section.

[0078] In the present embodiment, the stator vane 62 extends linearly over the entire length in the fore-and-aft direction X. However, the rear end 62d of the stator vane 62 may be curved downward. In this case, the stator vane 62 can smoothly guide the air flowing upward in the second linear portion 84a to the inner corner region 84d at the curved rear end 62d.

[0079] The outlet 85 is located at the upper end of the second region 84. The outlet 85 opens forward (in the +X direction). The outlet 85 is connected to the fan intake port 59a of the ventilation fan 51, which is located in the front (in the +X direction) of the intake airflow duct 80. In this embodiment, the outlet 85 is circular.

[0080] Air flowing into intake airflow duct 80 from inlet 81 flows downward (in the -Z direction) in first region 82 and into chamber region 83, which has a sufficient volume. The provision of retention section 83d in chamber region 83 slows the flow of air and stabilizes the pressure. Furthermore, this air flows at a uniform speed from chamber region 83 into second region 84 at connection section 87, which has a narrowed cross-sectional area of ​​the flow path. In second region 84, the air flows upward (in the +Z direction) in second straight section 84a, gradually decreasing its flow speed, then changes direction forward (in the +X direction) at second bend 84b, and flows into ventilation fan 51 through outlet 85.

[0081] The ventilation fan 51 generates a swirling flow centered on the central axis O inside the spiral casing 59c. This swirling flow flows in the circumferential direction of the central axis O along the inner surface of the spiral casing 59c. This swirling flow is also blown downward from the fan exhaust port 59b, which opens downward, and flows into the exhaust airflow duct 90.

[0082] The exhaust air duct 90 is disposed below (in the −Z direction) the ventilation fan 51. The exhaust air duct 90 extends in the vertical direction Z. The exhaust air duct 90 guides the air blown out from the ventilation fan 51 to the outside of the ventilation device 30.

[0083] The exhaust airflow duct 90 overlaps the intake airflow duct 80 when viewed from the front-to-rear direction X, and is positioned closer to the wall 9 than the intake airflow duct 80. That is, the intake airflow duct 80 is positioned between the wall surface 9b and the exhaust airflow duct 90. This makes it easier to bring the intake airflow duct 80 closer to the wall surface 9b and to align the ventilation pipe 31 connected to the intake airflow duct 80 along the wall surface 9b. Furthermore, by separating the exhaust airflow duct 90 from the wall surface 9b, the exhaust port 46a connected to the exhaust airflow duct 90 is located away from the wall surface 9b, which makes it possible to suppress the adhesion of dirt to the wall surface 9b due to exhaust.

[0084] Next, the wiring configuration of the air conditioner 100 of this embodiment will be described. To ensure quietness in the room 8, the ventilation fan 51 is preferably located outside the room 7. If a power plug for supplying power to the ventilation fan 51 were provided separately from the indoor unit, the number of outlets required for the air conditioner would increase, potentially limiting installation locations. For this reason, there is a demand for a ventilation fan that can drive a ventilation device even when the number of outlets is limited. In view of the above circumstances, the present disclosure aims to provide an air conditioner that can reduce the number of outlets required.

[0085] As shown in Fig. 1 , the air conditioner 100 of this embodiment has a first electric wire 41, a second electric wire 42, and a third electric wire 43. The first electric wire 41 extends from the indoor unit 20. The first electric wire 41 is connected to the control unit 24 inside the indoor unit 20. A power plug 41a is provided at the end of the first electric wire 41. The power plug 41a is connected to an outlet provided in the room 8. The first electric wire 41 supplies power for the entire air conditioner 100 to the indoor unit 20.

[0086] The second electric wire 42 connects the indoor unit 20 and the outdoor unit 10. The second electric wire 42, together with the circulation path portion 18 and the ventilation pipe 31, is drawn from the indoor space 8 to the outdoor space 7 through the through-hole 9h in the wall 9. The second electric wire 42 is connected to the control unit 24 inside the indoor unit 20. The second electric wire 42 is connected to the control unit 17 inside the outdoor unit 10. The second electric wire 42 supplies power from the indoor unit 20 to the outdoor unit 10.

[0087] The third electric wire 43 connects the indoor unit 20 and the ventilation device 30. The third electric wire 43, together with the circulation path portion 18 and the ventilation pipe 31, passes through the through-hole 9h in the wall 9 and is drawn from the indoor room 8 to the outdoor room 7. The third electric wire 43 is connected to the control unit 24 inside the indoor unit 20. The third electric wire 43 is connected to the ventilation fan 51 inside the ventilation device 30. The third electric wire 43 supplies power from the indoor unit 20 to the ventilation device 30. The indoor unit 20 also controls the rotation speed of the fan motor of the ventilation fan 51 by controlling the power supply and voltage in the control unit 24.

[0088] Note that in addition to the ventilation pipe 31, the first electric line 41, the second electric line 42, and the third electric line 43, the circulation path section 18 and the drain hose 20d are also connected to the indoor unit 20. As shown in Fig. 3 , the circulation path section 18, the second electric line 42, the third electric line 43, the drain hose 20d, and the ventilation pipe 31 extend from the back surface of the indoor unit 20 and pass through a through-hole 9h provided in the wall 9.

[0089] According to the wiring configuration of the air conditioner 100 of this embodiment, the indoor unit 20, the outdoor unit 10, and the ventilation device 30 can be driven by inserting a single power plug 41a into an outlet (e.g., a commercial power outlet). This reduces the number of outlets into which the power plugs are inserted, compared to when electrical wiring with a power plug is provided for each of the indoor unit, outdoor unit, and ventilation device. The air conditioner 100 of this embodiment can be widely installed, even in locations where the number of available outlets is limited.

[0090] According to the wiring configuration of the air conditioner 100 of this embodiment, the third electric wire 43 can be shortened, reducing the effect of external noise on the operation, for example, in cases where the ventilation device 30 is placed closer to the indoor unit 20 than the outdoor unit 10. Furthermore, because the control unit 24 of the indoor unit 20 controls the ventilation device 30, there is no need to provide a circuit board inside the ventilation device main body 50, and the ventilation device main body 50 can be made smaller.

[0091] <Modifications> The following describes wiring configurations of modifications that can be employed in the above-described embodiment. In the following modifications, configurations similar to those in the above-described embodiment or modifications previously described will be assigned the same reference numerals and descriptions thereof will be omitted.

[0092] 11 is a schematic diagram showing a wiring configuration 140 of an air conditioner 100A according to Modification 1. The wiring configuration 140 of this modification has a first electric wire 41, a second electric wire 42, and a third electric wire 143. As in the above-described embodiment, the first electric wire 41 extends from the indoor unit 20 and is provided with a power plug 41a at its tip. The second electric wire 42 connects the indoor unit 20 and the outdoor unit 10.

[0093] The third electric wire 143 connects the outdoor unit 10 and the ventilation device 30. The third electric wire 143 is connected to the control unit 17 inside the outdoor unit 10. The third electric wire 143 is connected to the ventilation fan 51 inside the ventilation device 30. The third electric wire 143 supplies power from the outdoor unit 10 to the ventilation device 30. Furthermore, the outdoor unit 10 controls the rotation speed of the fan motor of the ventilation fan 51 by controlling the power supply and voltage in the control unit 17.

[0094] According to the wiring configuration 140 of this modified example, the air conditioner 100A can be widely installed even in locations where the number of available outlets is limited. According to the wiring configuration 140 of this modified example, the third electric wire 143 can be shortened, for example, when the ventilation device 30 is located closer to the outdoor unit 10 than the indoor unit 20, thereby reducing the impact of external noise on the operation of the ventilation device 30. According to the wiring configuration 140 of this modified example, the third electric wire 143 does not need to be passed through the through-hole 9h in the wall 9, thereby improving the ease of wiring installation. According to the wiring configuration 140 of this modified example, the control unit 17 of the outdoor unit 10 controls the ventilation device 30, so there is no need to provide a circuit board inside the ventilation device main body 50, and the ventilation device main body 50 can be made more compact.

[0095] 12 is a schematic diagram showing a wiring configuration 240 of an air conditioner 100B of Modification 2. The wiring configuration 240 of this modification is similar to Modification 1, but differs mainly in that the ventilation device 30 has a control unit 30e inside the ventilation device main body 50, and that the outdoor unit 10 has a connector portion C into which the third electric wire 243 can be inserted and removed.

[0096] The wiring configuration 240 of this modified example has a first electric wire 41, a second electric wire 42, and a third electric wire 243. As in the first modified example, the first electric wire 41 extends from the indoor unit 20 and has a power plug 41a attached to its tip. The second electric wire 42 connects the indoor unit 20 and the outdoor unit 10. The third electric wire 243 connects the outdoor unit 10 and the ventilation device 30. The third electric wire 243 is insertable into and removable from the connector portion C of the outdoor unit 10.

[0097] The wiring configuration 240 of this modified example can be used when the ventilation device 30 is an optional part sold separately. That is, a user who purchases the ventilation device 30 as an optional part inserts the plug at the end of the third electric wire 243 extending from the ventilation device 30 into the connector C of the outdoor unit 10 to connect the ventilation device 30 to the outdoor unit 10.

[0098] The control unit 30e of the ventilation device 30 controls the ventilation fan 51 (see FIG. 3 etc.) inside the ventilation device main body 50. The control unit 17 of the outdoor unit 10 has a relay circuit that allows selection of the connection state with the control unit 30e of the ventilation device 30. By inserting the plug at the end of the third electric wire 243 into the connector part C of the outdoor unit 10, the control unit 30e of the ventilation device 30 is connected to the control unit 17 of the outdoor unit 10.

[0099] According to this modification, the user can choose whether or not to install the ventilation device 30 as needed, thereby widening the range of options available to the user. According to the wiring configuration 240 of this modification, there is no need to pass the third electric wire 243 through the through-hole 9h in the wall 9, which improves the ease of wiring installation.

[0100] 13 is a schematic diagram showing a wiring configuration 340 of an air conditioner 100C according to Modification 3. The wiring configuration 340 of this modification has a first electric wire 341, a second electric wire 342, and a third electric wire 143. As in Modification 1 described above, the third electric wire 143 connects the outdoor unit 10 and the ventilation device 30.

[0101] The second electric wire 342 connects the indoor unit 20 and the outdoor unit 10. The second electric wire 342, together with the circulation path portion 18 and the ventilation pipe 31, is drawn from the indoor space 8 to the outdoor space 7 through the through-hole 9h in the wall 9. The second electric wire 342 is connected to the control unit 24 inside the indoor unit 20. The second electric wire 342 is connected to the control unit 17 inside the outdoor unit 10. The second electric wire 342 supplies power from the outdoor unit 10 to the indoor unit 20.

[0102] The wiring configuration 340 of this modified example can be used when the outlet into which the power plug 41a is inserted is located outside the room 7. With the wiring configuration 340 of this modified example, there is no need to pass the third electric wire 143 through the through-hole 9h in the wall 9, which improves the ease of wiring installation. With the wiring configuration 340 of this modified example, the control unit 17 of the outdoor unit 10 controls the ventilation device 30, so there is no need to provide a circuit board inside the ventilation device main body 50, and the ventilation device main body 50 can be made more compact.

[0103] 14 is a schematic diagram showing a wiring configuration 440 of an air conditioner 100D according to Modification 4. The wiring configuration 440 of this modification has a first electric wire 441, a second electric wire 442, and a third electric wire 443.

[0104] The first electric wire 441 extends from the ventilation device 30. The ventilation device 30 of this modified example has a control unit 30e inside the ventilation device main body 50. The control unit 30e of the ventilation device 30 controls the ventilation fan 51 inside the ventilation device main body 50. The first electric wire 441 is connected to the control unit 30e inside the ventilation device 30. A power plug 41a is provided at the end of the first electric wire 441. The power plug 41a is connected to an outlet provided outside 7. The first electric wire 441 supplies power for the entire air conditioner 100D to the ventilation device 30.

[0105] The second electric wire 442 connects the indoor unit 20 and the outdoor unit 10. The second electric wire 442, together with the circulation path portion 18 and the ventilation pipe 31, is drawn from the indoor space 8 to the outdoor space 7 through the through-hole 9h in the wall 9. The second electric wire 442 is connected to the control unit 24 inside the indoor unit 20. The second electric wire 442 is connected to the control unit 17 inside the outdoor unit 10. The second electric wire 442 supplies power from the outdoor unit 10 to the indoor unit 20.

[0106] The third electric wire 443 connects the outdoor unit 10 and the ventilation device 30. The third electric wire 443 is connected to the control unit 17 inside the outdoor unit 10. The third electric wire 443 is connected to the control unit 30e inside the ventilation device 30. The third electric wire 443 supplies power from the ventilation device 30 to the outdoor unit 10.

[0107] 14 , instead of the third electric wire 443 of this modified example, a third electric wire 442A connecting the indoor unit 20 and the ventilation device 30 may be used. In this case, the third electric wire 442A, together with the second electric wire 442, passes through the through-hole 9h in the wall 9 and is drawn from the indoor space 8 to the outdoor space 7. Also in this case, power is supplied to the outdoor unit 10 from the indoor unit 20 via the second electric wire 442. The wiring configuration 440 of this modified example can be used when the outlet into which the power plug 41a is inserted is located outside the room 7.

[0108] <Summary> The air conditioner 100 of this embodiment includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, and a ventilation device 30. The indoor unit 20 is installed in the room 8 and has a heat exchanger (first heat exchanger) 22. The outdoor unit 10 is installed in the outdoor space 7 and has a heat exchanger (second heat exchanger) 13. The circulation path section 18 passes through a through-hole 9h in a wall 9 separating the room 8 from the 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 exhausts air from the room 8 to the outdoor space 7 through an exhaust port. The ventilation device 30 includes a ventilation pipe 31 and a ventilation device main body 50. The ventilation pipe 31 passes through the through-hole 9h from the indoor unit 20 and is drawn out to the outdoor space 7. The ventilation device main body 50 is fixed to a wall surface 9b of the outdoor space 7. The ventilation device main body 50 includes a ventilation fan 51, an intake airflow duct 80 connecting the ventilation pipe 31 and the ventilation fan 51, and an exhaust airflow duct 90 connecting the ventilation fan 51 and the exhaust port 46a. The ventilation fan 51 includes a fan intake port 59a connected to the intake airflow duct 80 and a fan exhaust port 59b connected to the exhaust airflow duct 90. Two directions perpendicular to the vertical direction Z and perpendicular to each other are defined as a first direction (left-right direction Y in the embodiment) and a second direction (front-back direction X in the embodiment). The intake airflow duct 80 includes an inlet 81, a first region 82, a chamber region 83, a second region 84, and an outlet 85. The inlet 81 opens upward (in the +Z direction) and is connected to the ventilation pipe 31. The first region 82 extends downward (in the -Z direction) from the inlet 81. The chamber region 83 is connected to the first region 82 and extends in the first direction (left-right direction Y). The second region 84 is located on one side (-Y direction) in the first direction (left-right direction Y) of the first region 82 and extends upward (+Z direction) from the chamber region 83. The outlet 85 is located at the upper end of the second region 84 and connects to the fan intake vent 59a. The exhaust air duct 90 extends downward (-Z direction) from the fan exhaust vent 59b and overlaps with the intake air duct 80 when viewed from the second direction (front-back direction X).

[0109] According to the above-described configuration, as shown in FIG. 3 , the ventilation fan 51 is disposed inside the ventilation device main body 50 located outside the room 7. This prevents noise caused by the operation of the ventilation fan 51 from being transmitted to the room 8, thereby maintaining a quiet interior space inside the room 8. However, disposing the ventilation fan 51 outside the room 7 also causes condensation to form in the ventilation piping 31 and the intake airflow duct 80 (see FIG. 9 ). According to the above-described configuration, as shown in FIG. 9 , the intake airflow duct 80 is formed in a U-shape in the first region 82, the chamber region 83, and the second region 84. This makes it easier for condensation to form in the ventilation piping 31 and the intake airflow duct 80 to remain in the chamber region 83, which corresponds to the lower end of the U-shape, and prevents condensation from entering the ventilation fan 51 located downstream of the intake airflow duct 80. Furthermore, with the above-described configuration, the inlet 81 of the intake airflow duct 80 opens upward, so that condensation water generated in the ventilation pipe 31 can be guided into the intake airflow duct 80, thereby preventing condensation water from accumulating in the ventilation pipe 31. Note that it is preferable to drain the condensation water accumulated in the intake airflow duct 80 by providing a drainage hole 63h in the chamber region 83, for example.

[0110] According to the above-described configuration, because the exhaust airflow duct 90 extends downward from the fan exhaust port 59b, even if rainwater enters through the exhaust port 46a located at the downstream end of the exhaust airflow duct 90, the rainwater is unlikely to reach the fan exhaust port 59b. This makes it possible to prevent rainwater from entering the interior of the ventilation fan 51. According to the above-described configuration, the intake airflow duct 80 provided inside the ventilation device main body 50 is U-shaped, thereby ensuring a long, curved airflow duct on the upstream side of the ventilation fan 51. Therefore, the driving noise generated by the ventilation fan 51 is unlikely to be transmitted to the room 8 through the intake airflow duct 80 and the ventilation piping 31, thereby maintaining quietness in the room 8.

[0111] In the air conditioner 100 of this embodiment, the second direction is a direction perpendicular to the wall surface 9b. The chamber region 83 has a rectangular cross section whose short side is in the second direction (front-rear direction X) and extends in the first direction (left-right direction Y). The chamber region 83 has a retention portion 83d that extends to one side (-Y direction) in the first direction (left-right direction Y) with respect to a connection portion 87 with the second region 84.

[0112] According to this configuration, by making the cross-sectional shape of the chamber region 83 rectangular, it is possible to ensure a large volume of the chamber region 83 while suppressing an increase in the dimension in the second direction (front-rear direction X). Furthermore, according to this configuration, because the chamber region 83 has the retention portion 83d, the air that flows along the outer wall surface of the chamber region 83 from the first region 82 is retained in the retention portion 83d and is less likely to flow directly into the second region 84. This makes it possible to slow down the air velocity in the chamber region 83 and to moderate the air flow, thereby enabling a stable volume of air to be supplied to the second region located downstream of the chamber region 83. As a result, the suction efficiency of the ventilation fan 51 is improved, and turbulence is prevented from entering the ventilation fan 51, thereby suppressing noise generation from the ventilation fan 51. Furthermore, by making the shape of the flow path cross section of the chamber region 83 rectangular with the short side in the second direction (front-to-back direction X), it is possible to increase the amount of air that can be stored in the chamber region 83 while suppressing an increase in the dimension of the chamber region in the second direction (front-to-back direction X).

[0113] In the air conditioner 100 of this embodiment, the first region 82 has a first linear portion 82a and a first bent portion 82b. The first linear portion 82a extends linearly in the vertical direction Z. The first bent portion 82b bends downward from the lower end of the first linear portion 82a to one side (-Y direction) in the first direction (left-right direction Y) and connects to the end of the chamber region 83 on the other side (+Y direction) in the first direction (left-right direction Y). The flow path cross section of the first linear portion 82a is rectangular with its short side extending in the second direction (front-back direction X), and its area continuously increases downward. The flow path cross section of the first bent portion 82b is rectangular with its short side extending in the second direction (front-back direction X).

[0114] According to this configuration, the first region 82 has the first bent portion 82b, which smoothly connects the first region 82 and the chamber region 83, allowing air to be stably sent from the first region 82 into the chamber region 83. Furthermore, by forming the flow path cross section of the first straight portion 82a into a rectangular shape whose area increases downward, a large volume of the chamber region 83 can be ensured without creating a step at the connection portion 86 with the chamber region 83. Furthermore, because the first region 82 is continuously connected to the upstream side of the chamber region 83, it partially fulfills the function of stabilizing pressure, which is a function of the chamber region 83. By forming the first region 82 into a rectangular shape with its short side in the second direction (the front-rear direction X), the amount of air that can be stored in the first region 82 can be increased while suppressing an increase in the dimension in the second direction (the front-rear direction X).

[0115] In the air conditioner 100 of this embodiment, the outlet 85 opens in the second direction (front-rear direction X). The second region 84 has a second straight portion 84a and a second bent portion 84b. The second straight portion 84a extends linearly in the vertical direction Z. The second bent portion 84b bends to one side (+X direction) in the second direction (front-rear direction X) as it extends upward from the upper end of the second straight portion 84a and connects to the outlet 85. The area of ​​the flow path cross section of the second straight portion 84a continuously increases as it extends upward from a connection portion 87 with the chamber region 83.

[0116] 10 , the second region 84 has the second bent portion 84b, which allows the air in the second region 84 to be stably sent toward the outlet 85 opening in the second direction (front-rear direction X). Furthermore, with this configuration, the flow path cross-sectional area of ​​the second straight portion 84a increases upward, thereby narrowing the flow path cross-sectional area at the connection portion 87 with the chamber region 83 to make the flow path cross-sectional area uniform within the air passage cross section, and gradually decreasing the air velocity while maintaining uniformity, thereby rectifying the air. This prevents turbulence from flowing into the ventilation fan 51, increases the suction efficiency of the ventilation fan 51, reduces power consumption of the ventilation fan 51, and suppresses noise generation by the ventilation fan 51.

[0117] In the air conditioner 100 of this embodiment, the second straight section 84a has a circular flow path cross section. This configuration reduces airflow resistance in the second straight section 84a and straightens the air flowing through the second straight section 84a. This increases the suction efficiency of the ventilation fan 51 and reduces noise generated by the ventilation fan 51.

[0118] In the air conditioner 100 of this embodiment, the second bent portion 84b is provided with a plate-shaped stator vane 62 that extends in the second direction (the front-to-rear direction X) and divides the flow path cross section of the second bent portion 84b into two upper and lower regions. With this configuration, the stator vane 62 divides the second bent portion 84b into upper and lower regions, thereby ensuring the amount of air flowing into the lower region, the inner corner region 84d. This makes it possible to uniformize the air flowing into the ventilation fan 51 from the outlet 85, improving the suction efficiency of the ventilation fan 51 and reducing noise generated by the ventilation fan 51.

[0119] In the air conditioner 100 of this embodiment, the stator vane 62 has an upwardly convex curved shape with an apex at the center 62m in the first direction (left-right direction Y) when viewed from the second direction (front-rear direction X). The air volume distribution in the second region is greatest at the center in the first direction (left-right direction Y). With the above-described configuration, the stator vane 62 can guide more air from the center in the first direction (left-right direction Y) to the inner corner region 84d, effectively suppressing air separation at the inner corner wall surface 63b.

[0120] In the air conditioner 100 of this embodiment, the fan intake 59a is located on one side (+X direction) in the second direction (front-to-rear direction X) of the outlet 85. An end 62c of the stator vane 62 on one side (+X direction) in the second direction (front-to-rear direction X) is located on the other side (-X direction) in the second direction (front-to-rear direction X) of the fan intake 59a. As shown in FIG. 10 , slight turbulence T may occur on the upper surface 62a of the stator vane 62. If this turbulence T reaches the inside of the ventilation fan 51, it may vibrate the impeller of the ventilation fan 51 and cause noise. According to this embodiment, the stator vane 62 does not protrude into the ventilation fan 51, so the turbulence T is less likely to reach the inside of the ventilation fan 51, and noise generation from the ventilation fan 51 can be suppressed.

[0121] In the air conditioner 100 of this embodiment, the fan intake 59a is located on one side (+X direction) in the second direction (front-rear direction X) of the outlet 85. The end 62d of the stator vane 62 on the other side (-X direction) in the second direction (front-rear direction X) is located on one side (+X direction) in the second direction (front-rear direction X) of the center line CL of the second region 84. If the stator vane 62 is extended too far in the other side (-X direction) in the second direction (front-rear direction X), the amount of air flowing from the second straight portion 84a into the inner corner region 84d becomes too large, resulting in an uneven air flow distribution in the flow path cross section of the outlet 85. With the above-described configuration, by positioning the rear end 62d of the stator vane 62 forward of the center line CL, it is possible to more easily equalize the amount of air flowing in the outer corner region 84c and the inner corner region 84d.

[0122] In the air conditioner 100 of this embodiment, the second direction is a direction perpendicular to the wall surface 9b. The exhaust air duct 90 overlaps the intake air duct 80 when viewed from the second direction (front-to-back direction X) and is positioned closer to the wall 9 than the intake air duct 80. With this configuration, by arranging the intake air duct 80 and the exhaust air duct 90 overlapping in the second direction (front-to-back direction X), the ventilation device main body 50 can be made smaller in the vertical direction Z and the first direction (left-to-right direction Y). With this configuration, by arranging the intake air duct 80 closer to the wall 9, the ventilation piping 31 connected to the intake air duct 80 can be easily aligned along the wall surface 9b. In addition, the drain air duct E can be positioned farther from the wall surface 9b than the intake air duct 80, and the exhaust port 46a connected to the exhaust air duct 90 can be positioned farther from the wall surface 9b. This reduces the adhesion of dirt to the wall surface 9b caused by exhaust air from the exhaust port 46a.

[0123] The air conditioner 100 of this embodiment shown in FIG. 1 includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, a ventilation device 30, a first electric line 41, a second electric line 42, and a third electric line 43. The indoor unit 20 is installed on a wall surface 9a of the room 8 and has a heat exchanger (first heat exchanger) 22. The outdoor unit 10 is installed on the outdoor space 7 and has a heat exchanger (second heat exchanger) 13. The circulation path section 18 passes through a through-hole 9h in the wall 9 separating 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 exhausts air from the room 8 to the outdoor space 7 through an exhaust port. It has a ventilation fan 51 located on the outdoor space 7 and exhausts air from the room 8 to the outdoor space 7. The first electric line 41 extends from the indoor unit 20 and has a power plug 41a at its end. The second electric wire 42 connects the indoor unit 20 and the outdoor unit 10. The third electric wire 43 connects the indoor unit 20 and the ventilation device 30.

[0124] This configuration reduces the number of outlets into which the power plug 41a can be inserted, allowing the air conditioner 100 to be installed widely, even in locations where the number of available outlets is limited. Furthermore, in cases where the ventilation device 30 is located closer to the indoor unit 20 than the outdoor unit 10, the third electric wire 43 can be shortened, reducing the impact of external noise on the device's operation. Furthermore, because the control unit 24 of the indoor unit 20 controls the ventilation device 30, there is no need to provide a circuit board inside the ventilation device main body 50, allowing the ventilation device main body 50 to be made more compact.

[0125] The air conditioner 100A of Modification 1 shown in FIG. 11 includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, a ventilation device 30, a first electric line 41, a second electric line 42, and a third electric line 143. The indoor unit 20 is installed on a wall surface 9a of the room 8 and has a heat exchanger (first heat exchanger) 22. The outdoor unit 10 is installed on the outdoor space 7 and has a heat exchanger (second heat exchanger) 13. The circulation path section 18 passes through a through-hole 9h in the wall 9 separating 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 exhausts air from the room 8 to the outdoor space 7 through an exhaust port. It also has a ventilation fan 51 located on the outdoor space 7, which exhausts air from the room 8 to the outdoor space 7. The first electric wire 41 extends from the indoor unit 20 and has a power plug 41a at its tip. The second electric wire 42 connects the indoor unit 20 and the outdoor unit 10. The third electric wire 143 connects the outdoor unit 10 and the ventilation device 30.

[0126] This configuration allows the air conditioner 100A to be installed in a wide range of locations, even in places where the number of available outlets is limited. Furthermore, this configuration allows the third electric wire 143 to be shortened, for example, in cases where the ventilation device 30 is located closer to the outdoor unit 10 than the indoor unit 20. This configuration improves wiring installation workability because the third electric wire 143 does not need to be passed through the through-hole 9h in the wall 9. This configuration allows the control unit 17 of the outdoor unit 10 to control the ventilation device 30, thereby enabling the ventilation device main body 50 to be made more compact.

[0127] 12 differs from the air conditioner 100A of Modification 1 in that the outdoor unit 10 has a connector C into which the third electric wire 243 can be inserted and removed. This configuration allows the user to select whether or not to install the ventilation device 30 as needed.

[0128] The air conditioner 100C of Modification 3 shown in FIG. 13 includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, a ventilation device 30, a first electric line 341, a second electric line 342, and a third electric line 143. The indoor unit 20 is installed on a wall surface 9a of the room 8 and has a heat exchanger (first heat exchanger) 22. The outdoor unit 10 is installed on the outdoor space 7 and has a heat exchanger (second heat exchanger) 13. The circulation path section 18 passes through a through-hole 9h in the wall 9 separating 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 exhausts air from the room 8 to the outdoor space 7 through an exhaust port. It also has a ventilation fan 51 located on the outdoor space 7, which exhausts air from the room 8 to the outdoor space 7. The first electric wire 341 extends from the outdoor unit 10 and has a power plug 41a at its tip. The second electric wire 342 connects the indoor unit 20 and the outdoor unit 10. The third electric wire 143 connects the outdoor unit 10 and the ventilation device 30.

[0129] The air conditioner 100C having this configuration can be used when the outlet into which the power plug 41a is inserted is located outside the room 7. With this configuration, the third electric wire 143 does not need to be passed through the through-hole 9h in the wall 9, thereby improving the ease of wiring installation. With this configuration, the control unit 17 of the outdoor unit 10 controls the ventilation device 30, allowing the ventilation device main body 50 to be made smaller.

[0130] An air conditioner 100D of Modification 4 shown in FIG. 14 includes an indoor unit 20, an outdoor unit 10, a circulation path section (refrigerant piping) 18, a ventilation device 30, a first electric line 441, a second electric line 442, and a third electric line 443. The indoor unit 20 is installed on a wall surface 9a of the room 8 and has a heat exchanger (first heat exchanger) 22. The outdoor unit 10 is installed on the outdoor space 7 and has a heat exchanger (second heat exchanger) 13. The circulation path section 18 passes through a through-hole 9h in the wall 9 separating 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 exhausts air from the room 8 to the outdoor space 7 through an exhaust port. It also has a ventilation fan 51 located on the outdoor space 7, which exhausts air from the room 8 to the outdoor space 7. The first electric wire 441 extends from the ventilation device 30 and has a power plug 41a attached to its tip. The second electric wire 442 connects the indoor unit 20 and the outdoor unit 10. The third electric wire 443 connects the indoor unit 20 or the outdoor unit 10 to the ventilation device 30. The air conditioner 100D having this configuration can be used when the outlet into which the power plug 41a is inserted is located outdoors 7.

[0131] Although the embodiments and their modifications of the present disclosure have been described above, the present disclosure is not limited to the configurations of the above-described embodiments. For example, the shape of each flow path cross section in each region of the intake airflow duct 80 is not limited to the above-described embodiments and various shapes can be adopted. Furthermore, while the above-described configuration describes a case in which a centrifugal blower is used as the ventilation fan 51, the type of ventilation fan 51 is not limited to the above-described configuration.

[0132] 7...outdoor, 8...indoor, 8, 86, 87...connection portion, 9...wall, 9a, 9b...wall surface, 9h...through hole, 10...outdoor unit, 13...heat exchanger (second heat exchanger), 18...circulation path portion (refrigerant piping), 19...refrigerant, 20...indoor unit, 22...heat exchanger (first heat exchanger), 30...ventilation device, 31...ventilation piping, 41, 341, 441...first electric wire, 41a...power plug, 42, 342, 442...second electric wire, 43, 143, 243, 443, 442A...third electric wire, 46a...exhaust port, 50...ventilation device main body, 51...exchanger Air fan, 59a...fan intake port, 59b...fan exhaust port, 62...stationary blade, 62c, 62d, 83c...end portion, 62m...center portion, 80...intake air duct, 81, 85...outlet, 81...inlet, 82...first region, 82a...first straight portion, 82a, 84a...second straight portion, 82b...first bent portion, 83...chamber region, 83d...stagnation portion, 84...second region, 84b...second bent portion, 90...exhaust air duct, 100, 100A, 100B, 100C, 100D...air conditioner, C...connector portion, CL...center line, Z...vertical direction

Claims

1. an indoor unit installed indoors and having a first heat exchanger; an outdoor unit installed outdoors and having a second heat exchanger; a refrigerant pipe 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 that exhausts air from the room to the outside through an exhaust port, The ventilation device includes: A ventilation pipe extending from the room through the through hole to the outside of the room; A ventilation device main body fixed to the outdoor wall surface, The ventilation device main body includes: Ventilation fans and an intake air duct connecting the ventilation pipe and the ventilation fan; An exhaust air duct connecting the ventilation fan and the exhaust port, The ventilation fan is A fan intake port connected to the intake air passage; a fan exhaust port connected to the exhaust air duct, Two directions perpendicular to the vertical direction and perpendicular to each other are defined as a first direction and a second direction, The intake air duct is An inlet opening upward and connected to the ventilation pipe; a first region extending downward from the inlet; a chamber region connected to the first region and extending in the first direction; a second region located on one side of the first region in the first direction and extending upward from the chamber region; an outlet located at an upper end of the second region and connected to the fan intake port; The exhaust air passage extends downward from the fan exhaust port. Air conditioner.

2. The second direction is a direction perpendicular to the wall surface, The chamber region extends in the first direction with a rectangular cross section whose short side is in the second direction, the chamber region has a retention portion extending to one side in the first direction with respect to a connection portion with the second region; The air conditioner according to claim 1.

3. The first region is a first linear portion extending linearly in the vertical direction; a first bent portion that bends downward from a lower end of the first linear portion toward one side in the first direction and is connected to an end portion of the chamber region on the other side in the first direction, a flow passage cross section of the first straight portion has a rectangular shape with a short side in the second direction, and an area of ​​the first straight portion increases continuously downward; A flow path cross section of the first bent portion has a rectangular shape with a short side in the second direction. The air conditioner according to claim 2.

4. The outlet is open in the second direction, The second region is a second linear portion extending linearly in the vertical direction; a second bent portion that bends upward from an upper end of the second linear portion toward one side in the second direction and is connected to the outlet, the flow passage cross section of the second straight portion has an area that continuously increases from the connection portion with the chamber region toward the upper portion; The air conditioner according to claim 1.

5. The flow path cross section of the second straight portion is circular. The air conditioner according to claim 4.

6. a plate-shaped stator vane extending in the second direction and dividing a flow passage cross section of the second bent portion into two regions, an upper region and an lower region, is provided in the second bent portion; The air conditioner according to claim 4.

7. When viewed from the second direction, the stator blade has an upwardly convex curved shape having a vertex at a center portion in the first direction. The air conditioner according to claim 6.

8. the fan intake port is located on one side of the outlet port in the second direction, an end portion of the stator blade on one side in the second direction is located on the other side in the second direction relative to the fan intake port; The air conditioner according to claim 6.

9. an end portion of the stator blade on the other side in the second direction is located on one side in the second direction with respect to a center line of the second region; The air conditioner according to claim 8.

10. The second direction is a direction perpendicular to the wall surface, The exhaust airflow duct overlaps with the intake airflow duct when viewed from the second direction, and is disposed closer to the wall than the intake airflow duct. An air conditioner according to any one of claims 1 to 9.

11. A first electric wire extending from the indoor unit and having a power plug at its tip; A second electric wire connecting the indoor unit and the outdoor unit; and a third electric wire connecting the indoor unit and the ventilation device. The air conditioner according to claim 1.

12. A first electric wire extending from the indoor unit and having a power plug at its tip; A second electric wire connecting the indoor unit and the outdoor unit; and a third electric wire connecting the outdoor unit and the ventilation device. The air conditioner according to claim 1.

13. The outdoor unit has a connector portion into which the third electric wire can be inserted and removed. The air conditioner according to claim 12.

14. A first electric wire extending from the outdoor unit and having a power plug at its tip; A second electric wire connecting the indoor unit and the outdoor unit; and a third electric wire connecting the outdoor unit and the ventilation device. The air conditioner according to claim 1.

15. A first electric wire extending from the ventilation device and having a power plug at its tip; A second electric wire connecting the indoor unit and the outdoor unit; A second electric wire connecting the indoor unit or the outdoor unit and the ventilation device is provided. The air conditioner according to claim 1.