Air conditioner

Abstract

An air conditioner according to an embodiment comprises an outdoor unit and an indoor unit. The indoor unit is installed on an inner wall of a house, and includes: a suction unit for sucking in indoor air by means of a second fan of the outdoor unit; and a blowout unit (40) for blowing out, into the room, air that has been subjected to heat exchange by a second heat exchanger of the outdoor unit. In addition, the air conditioner is provided with: a first blowing path (31) that connects the suction unit and the second heat exchanger via a through-hole in the inner wall; and a second blowing path (32) that connects the second heat exchanger and the blowout unit (40) via the through-hole in the inner wall. When the indoor unit is viewed from the front in a state installed on the inner wall, the blowout unit (40) has a blowout port (43) that is an opening facing downward, and the suction unit has suction ports (53) that are openings facing sideways.

Description

air conditioner

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

[0002] Conventionally, an air conditioner is known that exchanges heat with outside air under the floor, supplies the heat-exchanged air to a living space, and exhausts the air from the living space to the outdoors through the underfloor (Patent Document 1).

[0003] Patent No. 6626550

[0004] However, in the above-described conventional air conditioner, there is room for improvement in the circulation effect of the supplied air.

[0005] Therefore, an object of the present disclosure is to provide an air conditioner with improved circulation effect.

[0006] An air conditioner according to one aspect of the present disclosure includes an outdoor unit having a compressor that compresses a working refrigerant, a first heat exchanger that exchanges heat between the working refrigerant and outdoor air, a first fan that sends air from the first heat exchanger to the outside, a second heat exchanger that exchanges heat between the working refrigerant and indoor air, and a second fan that sends indoor air to the second heat exchanger. The air conditioner also includes an indoor unit installed on an interior wall of a house, the indoor unit having an intake section that draws indoor air using the second fan and an outlet section that blows air that has undergone heat exchange in the second heat exchanger into the room. The air conditioner also includes a first air flow path that connects the intake section and the second heat exchanger via a through hole in the interior wall, and a second air flow path that connects the second heat exchanger and the outlet section via a through hole in the interior wall. When the indoor unit is viewed from the front while installed on an interior wall, the blowing section has a blowing outlet that is an opening facing downward, and the suction section has a suction inlet that is an opening facing to the side.

[0007] According to the present disclosure, it is possible to provide an air conditioner with improved circulation effect.

[0008] Fig. 1 is a schematic diagram showing the overall configuration of an air conditioner according to an embodiment. Fig. 2 is a diagram showing a configuration for realizing a refrigeration cycle in the air conditioner of Fig. 1. Fig. 3 is a perspective view showing the configuration of a blow-out section. Fig. 4 is a perspective view showing the configuration of the housing of an indoor unit. Fig. 5 is a perspective view showing the configuration of the housing of Fig. 4 excluding the front section. Fig. 6 is an analytical diagram of a comparative example showing the spread of air supplied into a room during heating when an intake port is provided on the top surface of the housing. Fig. 7 is an analytical diagram showing the spread of air supplied into a room during heating when an intake port is provided on the side of the housing.

[0009] An air conditioner according to one aspect of the present disclosure includes an outdoor unit having a compressor that compresses a working refrigerant, a first heat exchanger that exchanges heat between the working refrigerant and outdoor air, a first fan that sends air from the first heat exchanger to the outside, a second heat exchanger that exchanges heat between the working refrigerant and indoor air, and a second fan that sends indoor air to the second heat exchanger. The air conditioner also includes an indoor unit installed on an interior wall of a house, the indoor unit having an intake section that draws indoor air using the second fan and an outlet section that blows air that has undergone heat exchange in the second heat exchanger into the room. The air conditioner also includes a first air flow path that connects the intake section and the second heat exchanger via a through hole in the interior wall, and a second air flow path that connects the second heat exchanger and the outlet section via a through hole in the interior wall. When the indoor unit is viewed from the front while installed on an interior wall, the blowing section has a blowing outlet that is an opening facing downward, and the suction section has a suction inlet that is an opening facing to the side.

[0010] According to the present disclosure, the intake section has an intake port facing sideways, and the outlet section has an outlet facing downwards. This makes it less likely that warm, light air gathering at the top of the room will be drawn into the intake port during heating, compared to when the intake port is provided on the top surface of the indoor unit. In contrast, when the intake port is provided on the top surface of the indoor unit, warm air tends to move upward in the room before being drawn into the intake port. This makes it difficult for the warm air to reach the back of the room. In contrast, when the intake port is provided facing sideways, warm air tends to move upward in the room before being drawn into the intake port. This makes it easier for the warm air to reach the back of the room. This improves the circulation effect of the supply air. Furthermore, when the through-hole in the wall through which the second airflow path is inserted is the same as the through-hole in the wall through which the first airflow path is inserted, there is no need to form a through-hole for the second airflow path, improving installation efficiency.

[0011] In the above disclosure, the air outlet faces downward and also faces forward away from the inner wall, and the air inlet may include an air inlet facing one side from the indoor unit and an air inlet facing the other side.

[0012] According to the above configuration, after the warm air moves upward in the room, it is less likely to be sucked in by the air inlet. This makes it easier for the warm air to reach the back of the room, thereby further improving the circulation effect of the supply air.

[0013] In the above disclosure, the first air flow path and the second air flow path may be inserted through the same through-hole and connected to the rear side of the indoor unit.

[0014] According to the above configuration, the first airflow duct and the second airflow duct are inserted through the same through-hole, eliminating the need for separate through-holes. This improves installation workability. Furthermore, because the first airflow duct and the second airflow duct are connected to the rear side of the indoor unit, this reduces the loss of aesthetic appeal and improves installation flexibility compared to connecting each airflow duct to, for example, the side of the indoor unit.

[0015] Hereinafter, an air conditioner according to an embodiment of the present disclosure will be described with reference to the drawings. The air conditioner described below is merely one embodiment of the present disclosure. Therefore, the present disclosure is not limited to the following embodiment, and additions, deletions, and modifications are possible within the scope of the present disclosure.

[0016] Fig. 1 is a schematic diagram showing the overall configuration of an air conditioner 100 according to an embodiment. Fig. 2 is a diagram showing a configuration for realizing a refrigeration cycle in the air conditioner 100 of Fig. 1.

[0017] As shown in Figure 1, the air conditioner 100 comprises an outdoor unit 1 installed outside the house H, an indoor unit 2 installed inside the house H, a communication device 23 which is a remote communication device operated by a user, and a wireless router 24.

[0018] The outdoor unit 1 includes a housing 3, a housing 4, a first fan 5, a first heat exchanger 6, a second heat exchanger 7, a second fan 8, a control device 9, an outdoor communication device 10, a power cord 11 corresponding to an electrical connector, and a power supply board (not shown). As shown in FIG. 2 , the outdoor unit 1 also includes a compressor 12, a four-way valve 13, an expansion valve 14, and refrigerant pipes P1, P2, and P3.

[0019] The housing 3 is disposed, for example, on the side of an interior wall 26 of the house H. Note that the interior wall 26 is not a ceiling wall but a side wall perpendicular to the indoor floor. Here, "perpendicular" refers to a vertical orientation, but also includes slight deviations from the vertical due to fluctuations or other factors. Specifically, "perpendicular" refers to an orientation within 90 degrees ±5 degrees, preferably within 90 degrees ±3 degrees, and more preferably within 90 degrees ±1 degree. Note that the interior wall 26 does not necessarily have to be perpendicular to the indoor floor. The housing 3 contains a first fan 5, a first heat exchanger 6, a control device 9, the power supply board, and an outdoor communication device 10. A power cord 11 is connected to the power supply board. By connecting the plug of the power cord 11 to an outdoor outlet, power is supplied to each component of the outdoor unit 1 via the power supply board. Note that at least one of the control device 9, the power supply board, and the outdoor communication device 10 may be housed within the housing 4.

[0020] The housing 4 is disposed, for example, on top of the housing 3. A second heat exchanger 7 and a second fan 8 are housed inside the housing 4. By disposing the second heat exchanger 7 inside the housing 4 of the outdoor unit 1 in this way, a drain hose for discharging drain water generated in the second heat exchanger 7 is not required.

[0021] The compressor 12 compresses the working refrigerant. During cooling operation, the compressor 12 sends the working refrigerant to the first heat exchanger 6 via the four-way valve 13. During heating operation, the compressor 12 sends the working refrigerant to the second heat exchanger 7 via the four-way valve 13.

[0022] Examples of working refrigerants in the air conditioner 100 include flammable refrigerants such as isobutane and propane. The flammable refrigerant may be a carbon-based refrigerant such as propane or isobutane, which has a higher specific gravity than air, or a fluorocarbon-based refrigerant such as HFO1234yf or R32, or a mixture thereof, or may be a weakly flammable or slightly flammable refrigerant. The refrigerant may be a single refrigerant or a mixture of another type of refrigerant and a flammable refrigerant.

[0023] The first heat exchanger 6 exchanges heat between outside air and the working refrigerant. The air that has undergone heat exchange by the first heat exchanger 6 is sent to the outside by the first fan 5. A motor 5a that drives the first fan 5 is provided inside the housing 3. The first fan 5 is driven to rotate by the motor 5a based on instructions from the control device 9. In this embodiment, a propeller fan is exemplified as the first fan 5.

[0024] The second heat exchanger 7 exchanges heat between the working refrigerant and indoor air flowing in through an air transfer duct 30 (described later) using a second fan 8. A motor 8a for driving the second fan 8 is provided inside the housing 4. The second fan 8 is driven to rotate by the motor 8a based on instructions from a control device 9. In this embodiment, a sirocco fan is used as the second fan 8. A plurality of second fans 8 may be provided.

[0025] The control device 9 may be configured as a microcontroller including a CPU (Central Processing Unit) and memory (ROM (Read Only Memory) and RAM (Random Access Memory)) that stores a program, or an ASIC (Application Specific Integrated Circuit). The control device 9 controls the operation of the compressor 12, the motor 5a of the first fan 5, and the motor 8a of the second fan 8. The outdoor communication device 10 also wirelessly communicates with the outside (e.g., a communication device 23) via a wireless router 24. The wireless communication between the outdoor communication device 10 and the communication device 23 is performed, for example, via Wi-Fi (registered trademark). By operating the communication device 23 indoors, a user can turn the power of the outdoor unit 1 on and off, switch between heating and cooling, set the temperature, etc.

[0026] The power supply board receives power to be supplied to the control device 9 via a power cord 11, and also receives power to be supplied to the motor 5 a, the motor 8 a, and the compressor 12. In this way, power is supplied to the control device 9, the motor 5 a, the motor 8 a, and the compressor 12.

[0027] The indoor unit 2 is provided, for example, at the upper part of the room of the house H. The indoor unit 2 is fixed to the upper part of an interior wall 26 of the house H. The indoor unit 2 has a housing 50 and a blowout section 40, which will be described later. The housing 50 houses the blowout section 40 and is provided with an intake port 53, which is an opening facing to the side when viewed from the front of the indoor unit 2 installed on the interior wall 26 and which draws in indoor air, and a housing outlet 21 through which air blown out from the blowout section 40 passes toward the room.

[0028] The intake port 53 draws in air from inside the house H using the second fan 8. The outlet section 40 blows the air that has been heat exchanged by the second heat exchanger 7 and flows through the air transport duct 30 (described later) into the room of the house H via the housing outlet 21. Details of the intake port 53 and the outlet section 40 will be described later.

[0029] A first air flow path 31 is provided, connecting the air intake 53 and the second heat exchanger 7 via a through-hole 25 provided in the inner wall 26 of the house H. A second air flow path 32 is also provided, connecting the second heat exchanger 7 and the blow-out section 40 via the through-hole 25. That is, the air conditioner 100 has the first air flow path 31 and the second air flow path 32, which are inserted through the same through-hole 25 and connected to the rear side of the indoor unit 2. The first air flow path 31 and the second air flow path 32 are housed in a tubular air transport duct 30. The interior of the air transport duct 30 is divided along the air flow direction by a partition (not shown). As a result, the first air flow path 31 and the second air flow path 32 are formed within the air transport duct 30.

[0030] The air transfer duct 30 has a small diameter section 30a that passes through the through hole 25 in the inner wall 26 of the house H, and a large diameter section 30b that is located between the small diameter section 30a and the outdoor unit 1 and has a larger outer diameter than the small diameter section 30a. The first air flow passage 31 and the second air flow passage 32 are formed across the small diameter section 30a and the large diameter section 30b.

[0031] Next, the refrigerant circuit Rc, which is the flow path of the working refrigerant, will be described. The air conditioner 100 includes the refrigerant circuit Rc shown in FIG. 2. The refrigerant circuit Rc does not span both the outdoor unit 1 and the indoor unit 2, but is provided only in the outdoor unit 1. As shown in FIG. 2, in the refrigerant circuit Rc, the inlet of the compressor 12 is connected to one end of the second heat exchanger 7 (corresponding to the downstream end during cooling operation) by a refrigerant pipe P1. Furthermore, the outlet of the compressor 12 is connected to one end of the first heat exchanger 6 (corresponding to the upstream end during cooling operation) by a refrigerant pipe P2. A four-way valve 13, which switches the flow of the working refrigerant during cooling and heating operation, is inserted between the refrigerant pipe P1 and the refrigerant pipe P2. Furthermore, the other end of the first heat exchanger 6 (corresponding to the downstream end during cooling operation) is connected to the other end of the second heat exchanger 7 (corresponding to the upstream end during cooling operation) by a refrigerant pipe P3. An expansion valve 14 for reducing the pressure of the working refrigerant is inserted in the refrigerant pipe P3.

[0032] The compressor 12, the four-way valve 13, and the expansion valve 14 are housed, for example, in the housing 3. The refrigerant pipe P2 is housed, for example, in the housing 3, and the refrigerant pipes P1 and P3 are housed, for example, in the housings 3 and 4.

[0033] In the configuration of FIG. 2 , during cooling operation, the working refrigerant compressed by the compressor 12 is heated to a high temperature and pressure and passes through the first and second ports of the four-way valve 13 via the refrigerant pipe P2 before being sent to the first heat exchanger 6. In the first heat exchanger 6, the working refrigerant exchanges heat with the outside air, releasing heat, becoming a high-pressure liquid refrigerant and being sent to the expansion valve 14 via the refrigerant pipe P3. In the expansion valve 14, the working refrigerant is decompressed to a low-temperature, low-pressure two-phase refrigerant and then sent to the second heat exchanger 7 via the refrigerant pipe P3. In the second heat exchanger 7, the working refrigerant exchanges heat with the indoor air, absorbing heat and evaporating into a low-temperature gas refrigerant. This cools the indoor air, thereby cooling the room. The working refrigerant then passes through the third and fourth ports of the four-way valve 13 via the refrigerant pipe P1 before being returned to the compressor 12.

[0034] During heating operation, the working refrigerant compressed by the compressor 12 is heated to a high temperature and pressure and passes through the first and third ports of the four-way valve 13 via the refrigerant pipe P2 before being sent to the second heat exchanger 7. In the second heat exchanger 7, the working refrigerant exchanges heat with the indoor air, dissipating heat and cooling to become a high-pressure liquid refrigerant. This heats the indoor air, heating the room. The working refrigerant is then sent to the expansion valve 14 via the refrigerant pipe P3, where it is decompressed into a low-temperature, low-pressure two-phase refrigerant. The working refrigerant is then sent to the first heat exchanger 6 via the refrigerant pipe P3. In the first heat exchanger 6, the working refrigerant exchanges heat with the outside air and is evaporated. The working refrigerant then passes through the second and fourth ports of the four-way valve 13 via the refrigerant pipe P2 before being returned to the compressor 12.

[0035] Next, a detailed description will be given of the configuration of the blowout section 40 provided inside the housing 50 of the indoor unit 2. FIG.

[0036] 3 , the air outlet section 40 has a diverter section 41, a rectifier section 42, and an outlet 43. The diverter section 41 divertes air from the second air flow path 32 in a first direction D1 that is perpendicular to the extension direction De of the second air flow path 32. The extension direction De is, for example, the front-to-rear direction of the indoor unit 2, and the first direction D1 is, for example, the left-to-right direction of the indoor unit 2.

[0037] The diverter 41 has an extension 44, a plurality of branch flow path portions 45, and a plurality of end flow path portions 47. The extension 44 extends in a first direction D1. The second air flow path 32 of the air transfer duct 30 is connected to one end of the extension 44 in the first direction D1 (the left end in FIG. 3 ). On the other hand, the first air flow path 31 of the air transfer duct 30 is disposed so as to be located above the extension 44, and opens within the housing 50 shown in FIG. 1 .

[0038] A plurality of branch flow paths 45, for example, six, are provided and arranged side by side along the first direction D1. The branch flow paths 45 are arranged at approximately equal intervals in the first direction D1. The branch flow paths 45 extend in a second direction D2 perpendicular to the first direction D1. The second direction D2 is, for example, the up-and-down direction. The branch flow paths 45 are arranged symmetrically on one side (e.g., the left) and the other side (e.g., the right) of the extending portion 44 in the first direction D1, with respect to the midpoint of the extending portion 44 in the first direction D1. That is, the number of branch flow paths 45 arranged on one side of the first direction D1 is the same as the number of branch flow paths 45 arranged on the other side of the first direction D1. The positions of the branch flow paths 45 arranged on one side of the first direction D1 and the positions of the branch flow paths 45 arranged on the other side of the first direction D1 are symmetrical with respect to the midpoint. Furthermore, each branch flow path 45 has a connection portion 45a connected to the extending portion 44. The details of the connection portion 45a of the branch flow path portion 45 will be described later.

[0039] For example, two end flow channel portions 47 are provided, one at one end in the first direction D1 and the other at the other end in the first direction D1 of the extending portion 44. The positions of the end flow channel portions 47 arranged on one side in the first direction D1 and the position of the end flow channel portions 47 arranged on the other side in the first direction D1 are symmetrical with respect to the intermediate position. Note that the width of each end flow channel portion 47 (i.e., the dimension in the first direction D1) may be larger than the width of each branch flow channel portion 45.

[0040] The rectifying section 42 rectifies the air diverted by the diverting section 41. The rectifying section 42 has a first rectifying component 42a and a second rectifying component 42b. The first rectifying component 42a is disposed upstream of the second rectifying component 42b. The lower ends (downstream ends) of the branch flow passages 45 and the lower ends (downstream ends) of the terminal flow passages 47 are connected to the first rectifying component 42a. The first rectifying component 42a is tapered from the upstream portion to the downstream portion in a side view (left side view or right side view). The second rectifying component 42b extends diagonally forward from the rear in a side view.

[0041] The air outlet 43 blows the air rectified by the airflow rectifying section 42 into the room via the housing outlet 21 of the housing 50. The air outlet 43 is provided at the downstream end of the second airflow rectifying component 42b of the airflow rectifying section 42. The air outlet 43 extends in the first direction D1. The air outlet 43 is an opening that faces downward and also faces forward, away from the inner wall 26, when viewed directly at the indoor unit 2 installed on the inner wall 26.

[0042] Next, Fig. 4 is a perspective view showing the configuration of the housing 50 of the indoor unit 2. Fig. 5 is a perspective view showing the configuration of the housing 50 of Fig. 4 with the front part 52 removed.

[0043] As shown in FIGS. 4 and 5 , the housing 50 has a frame body 51, a front portion 52, and a rear portion 54. The frame body 51 corresponds to the intake portion through which the second fan 8 draws indoor air. That is, the indoor unit 2 has the frame body 51 as an example of an intake portion. The frame body 51 has frame portions 51a, 51b, 51c, and 51d. The frame portions 51a to 51d are formed, for example, in a plate shape. The frame portion 51a extends in the first direction D1. The frame portion 51d extends in the first direction D1 and is located below the frame portion 51a. The dimensions of the frame portion 51d in the first direction D1 are approximately the same as those of the frame portion 51a. The dimensions of the frame portions 51a and 51d in the first direction D1 are larger than the dimensions of the frame portions 51b and 51c in the second direction D2. As a result, the frame body 51 is formed in a horizontally elongated shape. Frame portion 51b is connected to one end (left end) of frame portion 51a and one end (left end) of frame portion 51d and extends in the second direction D2. Frame portion 51c is connected to the other end (right end) of frame portion 51a and the other end (right end) of frame portion 51d and extends in the second direction D2. The dimensions of frame portion 51c in the second direction D2 are substantially the same as those of frame portion 51b. Furthermore, a plate-shaped reinforcing member 51e extending in the first direction D1 is connected to the front edges of frame portion 51b and frame portion 51c, and a plate-shaped reinforcing member 51f extending in the second direction D2 is connected to the front edges of frame portion 51a and frame portion 51d. In this embodiment, frame portion 51d corresponds to the underside of the housing.

[0044] The front surface 52 is disposed in front of the frame body 51 so as to cover the front edge of the frame body 51. The rear surface 54 is disposed behind the frame body 51 so as to cover the rear edge of the frame body 51 except for the portion where the front end edge of the air transport duct 30 is connected. This forms an internal space in the housing 50. In this embodiment, the rear surface 54 corresponds to the rear surface of the housing.

[0045] In this embodiment, as an example, the frame portions 51b and 51c of the frame body 51 are provided with a plurality of suction ports 53, which are openings. That is, the frame body 51, which is an example of an suction portion, has the suction ports 53. The plurality of suction ports 53 provided in the frame portion 51b face one side of the indoor unit 2 (the left side in FIGS. 4 and 5 ). The plurality of suction ports 53 provided in the frame portion 51c face the other side of the indoor unit 2 (the right side in FIGS. 4 and 5 ). The suction ports 53 are arranged side by side along the second direction D2. For example, five suction ports 53 are provided in each of the frame portions 51b and 51c. Each suction port 53 provided in the frame portion 51b is positioned above the midpoint of the frame portion 51b in the second direction D2. Similarly, each suction port 53 provided in the frame portion 51c is positioned above the midpoint of the frame portion 51c in the second direction D2.

[0046] The blowing section 40 is provided on the frame section 51d side inside the housing 50. Specifically, the blowing section 40 is provided on the frame section 51d side inside the housing 50 so that the outlet 43 of the blowing section 40 faces the housing outlet 21 of the housing 50. This allows a space to be formed above the blowing section 40 and opposite the intake ports 53 on both sides in the first direction D1. When the second fan 8 is operated, indoor air flows through the intake ports 53 and into the first air passage 31 via the space.

[0047] Fig. 6A is an analytical diagram of a comparative example showing the spread of air supplied into a room during heating when the air intake is provided on the top surface of the housing, and Fig. 6B is an analytical diagram showing the spread of air supplied into a room during heating when the air intake 53 is provided on frame portions 51b and 51c, which are the side surfaces of housing 50. In both Fig. 6A and Fig. 6B, the diagram of the spread of air in the room as seen from the side of the room is placed at the top, and the diagram of the spread of air on the floor of the room is placed at the bottom.

[0048] When the air intake is provided on the top surface of the housing, the warm air does not reach the back of the room (the right side in Fig. 6A) as shown in Fig. 6A. In this regard, when the air intake is provided on the top surface of the housing, it is thought that the warm, light air moves upward in the room and then tends to be sucked into the air intake, which makes it difficult for the air to reach the back of the room.

[0049] In contrast, by providing intake ports 53 on frame portions 51b and 51c as in this embodiment, it can be seen that warm air reaches the back of the room (the right side in FIG. 6B) as shown in Fig. 6B. In this regard, it is thought that the warm, light air that gathers in the upper part of the room during heating is less likely to be drawn into intake port 53 than when intake ports are provided on the top surface of the housing, making it easier for the air to reach the back of the room.

[0050] As described above, in the air conditioner 100 of this embodiment, the air intakes 53 are provided on the frame portions 51b and 51c of the housing 50 so as to face sideways, and the air outlet 40 is provided on the frame portion 51d side of the housing 50 so as to face downward. This makes it less likely that warm, light air that gathers at the top of the room will be drawn into the air intakes 53 during heating, compared to when the air intakes are provided on the top surface of the housing. This makes it easier for warm air to reach the back of the room. This improves the circulation effect of the supply air. Furthermore, because the through-hole 25 in the inner wall 26 through which the second air flow path 32 is inserted is the same as the through-hole 25 in the inner wall 26 through which the first air flow path 31 is inserted, there is no need to form a through-hole for the second air flow path 32, improving installation efficiency.

[0051] The present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present disclosure. For example, the following modifications are possible.

[0052] In the above embodiment, the frame body 51 is configured to be horizontally elongated, but is not limited to this and may be configured to be square in front view. In this case, the dimensions of the frame portions 51 a and 51 d in the first direction D1 can be made the same as the dimensions of the frame portions 51 b and 51 c in the second direction D2.

[0053] In the above embodiment, the second air flow passage 32 of the air transfer duct 30 is connected to one end of the extension portion 44 in the first direction D1 (the left end in FIG. 3 ), but this is not limited thereto, and the second air flow passage 32 may be connected to the other end of the extension portion 44 in the first direction D1 (the right end in FIG. 3 ), for example. Alternatively, the second air flow passage 32 may be connected to the center of the extension portion 44 in the first direction D1.

[0054] In the above embodiment, five suction ports 53 are provided in each of the frame portions 51b and 51c, but the number of suction ports 53 can be set as appropriate.

[0055] In addition, in the above embodiment, the housing 4 is disposed above the housing 3, but this is not limitative, and the housing 4 may be disposed below the housing 3. Alternatively, the housing 4 may be disposed to the side of the housing 3.

[0056] In the above embodiment, the wireless communication between the outdoor communication device 10 and the communication device 23 is performed by Wi-Fi (registered trademark), but this is not limited to this and may be performed by, for example, Bluetooth (registered trademark), etc. In this case, the wireless router 24 is not required.

[0057] Furthermore, in the above embodiment, the outdoor unit 1 is provided with two housings (housing 3 and housing 4), but this is not limiting, and each component may be housed in a single housing.

[0058] Furthermore, in the above embodiment, a remote communication device (remote controller) is exemplified as the communication device 23, but the present invention is not limited to this, and other communication devices such as a smartphone may also be used as the communication device 23.

[0059] REFERENCE SIGNS LIST 1 outdoor unit 2 indoor unit 3 housing 4 housing 5 first fan 5a motor 6 first heat exchanger 7 second heat exchanger 8 second fan 8a motor 9 control device 10 outdoor communication device 11 power cord 12 compressor 13 four-way valve 14 expansion valve 21 housing outlet 23 communication equipment 24 wireless router 25 through hole 26 inner wall 30 air conveying duct 30a small diameter section 30b large diameter section 31 first air flow path 32 second air flow path 40 blowing section 41 flow dividing section 42 rectifying section 42a first rectifying section 42b second rectifying section 43 blowing outlet 44 extension section 45 branch flow path section 45a connection section 47 end flow path section 50 housing 51 frame body 51a Frame portion 51b Frame portion 51c Frame portion 51d Frame portion 51e Reinforcing member 51f Reinforcing member 52 Front portion 53 Intake port 54 Rear portion 100 Air conditioner D1 First direction D2 Second direction De Extension direction H House P1 Refrigerant pipe P2 Refrigerant pipe P3 Refrigerant pipe Rc Refrigerant circuit

Claims

1. An indoor unit comprising: an outdoor unit having a compressor for compressing a working refrigerant, a first heat exchanger for exchanging heat between the working refrigerant and outside air, a first fan for sending air from the first heat exchanger to the outside, a second heat exchanger for exchanging heat between the working refrigerant and indoor air, and a second fan for sending the indoor air to the second heat exchanger; an indoor unit installed on an inner wall of a house, the indoor unit having an intake section for sucking in indoor air by the second fan, and a blowing section for blowing out air that has been heat exchanged by the second heat exchanger into the room; a first air passage connecting the intake section and the second heat exchanger via a through hole in the inner wall, and a second air passage connecting the second heat exchanger and the blowing section via a through hole in the inner wall, When the indoor unit is viewed head-on while installed on the inner wall, the blowing section has a blowing outlet that is an opening facing downward, and the suction section has a suction inlet that is an opening facing to the side.

2. An air conditioner as described in claim 1, wherein the air outlet faces downward and also faces toward the front away from the inner wall, and the air inlet includes an air inlet facing one side from the indoor unit and an air inlet facing the other side.

3. An air conditioner as described in claim 1 or 2, wherein the first air duct and the second air duct are inserted through the same through hole and connected to the rear side of the indoor unit.

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