Heat pump outdoor unit

Abstract

To prevent a first expansion valve from getting splashed with dew condensation water generated from a second expansion valve in a cooling cycle circuit to which a cooling terminal is connected.SOLUTION: A heat pump outdoor unit includes inside of a casing: a compressor 5 for compressing a refrigerant; an air heat exchanger 10 that exchanges heat between the refrigerant and outside air; a heating cycle circuit connected to a heating terminal that performs a heating operation and having a first expansion valve 8; and a cooling cycle circuit connected to a cooling terminal that performs a cooling operation and having a second expansion valve 15. The inside of the casing is partitioned into an air blower chamber 57 and a machine chamber 58 by a partition wall 59. The compressor 5, the first expansion valve 8 and the second expansion valve 15 are provided in the machine chamber 58. Since the position of the second expansion valve 1 is located below the position of the first expansion valve 8, failure and troubles due to adhesion of dew condensation water onto a mechanical component can be prevented.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] This invention relates to an outdoor heat pump unit having a plurality of expansion valves.

Background Art

[0002] Conventionally, this type of outdoor unit has included a refrigeration cycle circuit consisting of a compressor, an expansion valve, an evaporator, and a condenser. At least the compressor and the expansion valve were provided in the machine room, which was separated from the blower room by a partition plate.

[0003] Also, as described in Patent Document 2, when there are two heat pump circuits for a floor heating terminal and an air conditioning terminal, each heat pump circuit has an expansion valve, and the two expansion valves were provided in the machine room.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In this conventional device, when two expansion valves are arranged in the machine room, if they are arranged in parallel, the width of the outdoor unit increases. Therefore, it is conceivable to save space by arranging them vertically.

[0006] However, when performing cooling operation with a cooling terminal, in order to make the refrigerant in the refrigeration cycle circuit into a low-temperature refrigerant by the expansion valve, the surface of the expansion valve and the refrigerant pipe on the discharge side of the expansion valve dew, and if the condensed water drips onto the machine parts below the expansion valve, there is a possibility of problems or failures due to rust or electric leakage. [Means for solving the problem]

[0007] To solve the above problems, claim 1 of the present invention provides a compressor for compressing a refrigerant inside the housing, An air heat exchanger that performs heat exchange between the refrigerant and the outside air, A heating cycle circuit connected to a heating terminal that performs heating operation, and having a first expansion valve, It is connected to a cooling terminal that performs cooling operation and comprises a cooling cycle circuit having a second expansion valve, The interior of the aforementioned enclosure is divided into a blower room and a machine room by a partition plate. The machine room is equipped with the compressor, the first expansion valve, and the second expansion valve. The aforementioned housing comprises a base that forms the bottom surface, The base Four sides A rising section extending upward from the edge, A heat pump outdoor unit having a guide portion arranged on the base for guiding condensation water generated inside the housing to the outside of the housing, The second expansion valve is positioned lower than the first expansion valve. The second expansion valve Intake side The lower end of the pipe that connects to and extends downward is positioned below the upper end of the rising section. Connected to the discharge side of the second expansion valve The guide portion is positioned near the bottom of the piping.

[0008] Furthermore, in claim 2, the position of the second expansion valve is located below the power supply terminal for the compressor provided on the compressor.

[0009] Furthermore, in claim 3, the heating cycle circuit and the cooling cycle circuit are configured to share the compressor and the air heat exchanger.

[0010] In addition, in claim 4, the heating cycle circuit is connected to the heating terminal via a water-cooled medium heat exchanger provided in a hot water circuit using water as a refrigerant, and the cooling cycle circuit is connected to an indoor heat exchanger that exchanges heat with indoor air provided in the cooling terminal.

Advantages of the Invention

[0011] According to claim 1 of this invention, the position of the second expansion valve in the cooling cycle circuit is arranged below the first expansion valve in the heating cycle circuit, so that the condensed water generated from the second expansion valve in the cooling cycle circuit can be prevented from dripping onto the first expansion valve, and the occurrence of failures and malfunctions can be suppressed.

Brief Description of the Drawings

[0012] [Figure 1] Circuit configuration diagram of the entire air conditioning system according to an embodiment of the present invention [Figure 2] Schematic configuration diagram of the entire air conditioning system according to an embodiment of the present invention [Figure 3] Diagram showing the external structure of a floor heating remote control for operating a floor heating unit [Figure 4] Diagram for explaining the operation during floor heating operation [Figure 5] Diagram for explaining the operation during warm air heating operation [Figure 6] Diagram for explaining the operation during cold air heating operation [Figure 7] Exploded perspective view of the outdoor unit [[ID=**34]] [Figure 8] Perspective view extracting and showing the main part structure in FIG. 7 [Figure 9] Side view extracting and showing the main part structure in FIG. 7

Embodiments for Carrying Out the Invention

[0013] Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 6.

[0014] Please note that in the translation, the 7-digit tag is preserved as it is. If there is any specific requirement or correction for this tag, please let me know.Figure 1 shows the overall circuit configuration of the air conditioning system 1 equipped with the heat pump outdoor unit of this embodiment. As shown in Figure 1, the air conditioning system 1 includes an outdoor unit 4 which is the heat source of the air conditioning system 1, an indoor unit 17 (a cooling terminal capable of at least cold-air cooling operation), and a heat exchange terminal 27 (a heating terminal incapable of cold-air cooling operation). In this embodiment, the heat exchange terminal 27 is laid on the floor of the same room in which the indoor unit 17 is installed, and the indoor unit 17 and the heat exchange terminal 27 are located side by side in the same room (the space to be air-conditioned).

[0015] <Hot water circuit> The outdoor unit 4 has a refrigerant-side flow path 7b as a refrigerant passage for circulating refrigerant and a water-side flow path 7a as a water passage, and includes a water-refrigerant heat exchanger 7 that functions as a condenser for heat exchange between a high-temperature, high-pressure refrigerant and hot water to a heat exchange terminal 27, and a variable-speed circulation pump 34. Specifically, the water-side flow path 7a of the water-refrigerant heat exchanger 7 and the heat exchange terminal 27 are connected in a ring by a supply pipe 28 (corresponding to a supply line) and a return pipe 29 (corresponding to a return line) as hot water piping, forming a hot water circuit 33 as a hot water circulation circuit.

[0016] A supply header 30 is provided in the middle of the supply pipe 28 that extends from the water-refrigerant heat exchanger 7 towards the heat exchange terminal 27. The portion of the supply pipe 28 upstream of the supply header 30 is configured as a single common supply pipe 28a, to which hot water (which may be a circulating fluid other than water, such as antifreeze; the same applies hereinafter) heated in the water-refrigerant heat exchanger 7 is supplied. The portion of the supply pipe 28 downstream of the supply header 30 branches into multiple (four in the illustrated example) individual supply pipes 28b. Each of the branched individual supply pipes 28b is equipped with a thermal valve 31, which is an on / off valve.

[0017] Similar to the supply pipe 28, a return header 32 is provided in the middle of the return pipe 29 that extends from the heat exchange terminal 27 toward the water-refrigerant heat exchanger 7. The portion of the return pipe 29 upstream of the return header 32 branches into several (four in this case) individual return pipes 29b. The portion of the return pipe 29 downstream of the return header 32 is configured as a single common return pipe 29a, through which the hot water introduced via the individual return pipes 29b is returned to the water-refrigerant heat exchanger 7.

[0018] In this embodiment, for the sake of simplicity, an example is shown in which one heat exchange terminal 27 is connected. However, a heat exchange terminal 27 may be connected to each of the four branched individual supply pipes 28b as described above (i.e., four units may be connected).

[0019] The circulation pump 34 is installed in the middle of the common return pipe 29a and circulates the hot water from the return pipe 29 to the supply pipe 28 via the water-side flow path 7a, while also circulating the hot water at the heat exchange terminal 27. Upstream of the circulation pump 34 in the common return pipe 29a, a cistern 35 is provided to store hot water and adjust the pressure of the hot water circuit 33. Each of the individual return pipes 29b of the return pipe 29 is provided with a 123 (corresponding to a return temperature detection means) that detects the inlet water temperature T1 as the return temperature of the hot water flowing into the water-side flow path 7a of the water-refrigerant heat exchanger 7.

[0020] <Refrigerant circulation circuit> Meanwhile, a refrigerant circulation circuit 130 is provided from the outdoor unit 4 to the indoor unit 17, which can heat the hot water in the heat exchange terminal 27 by heat exchange in the water refrigerant heat exchanger 7 (details will be described later). The refrigerant circulation circuit 130 includes a main heat pump circuit section 130A, a floor heating side heat pump circuit section 130B which is a heating side heat pump, and an air conditioning side heat pump circuit section 130C which is a cooling side heat pump.

[0021] <Shared heat pump circuit section> The heat pump circuit section 130A includes refrigerant piping 11 that serves as a flow path for the refrigerant, a compressor 5 for compressing the refrigerant, a four-way valve 6, and an air heat exchanger 10 that selectively functions as a condenser or evaporator through heat exchange between the refrigerant and the outside air. These are connected by the refrigerant piping 11. The air heat exchanger 10 is, for example, a fin-tube type heat exchanger, and an outdoor fan 9 is provided to pass outside air through the air heat exchanger 10.

[0022] In detail, the refrigerant piping 11 includes a piping section 11a that is on the discharge side of the compressor 5, and a piping section 11b that is connected to the piping section 11a via a four-way valve 6 during floor heating operation, etc.

[0023] Furthermore, the refrigerant piping 11 includes a piping section 11c that is on the suction side of the compressor 5. In addition, the refrigerant piping 11 includes a piping section 11d that connects the compressor 5 side of the air heat exchanger 10 (in other words, the outlet side during floor heating operation, etc., hereafter the same, see Figure 4, etc.) to the piping section 11c via a four-way valve 6 during floor heating operation (see Figure 4, etc. below). Furthermore, the refrigerant piping 11 includes a piping section 11e that is connected to the non-compressor 5 side of the air heat exchanger 10 (in other words, the inlet side during floor heating operation, etc., hereafter the same, see Figure 4, etc. below).

[0024] The four-way valve 6 is a valve equipped with four ports, and switches which of the remaining two ports (for pipe sections 11a and 11c) is connected to each of the two ports (for pipe sections 11b and 11d, which constitute the main refrigerant path) of the refrigerant piping 11. The two ports for pipe sections 11a and 11c are connected by a refrigerant sub-path consisting of pipe sections 11a and 11c arranged in a loop, and the compressor 5 is installed on this refrigerant sub-path. For example, when the four-way valve 6 is switched to the state shown in Figure 4, which will be described later, it connects pipe section 11a, which is the discharge side of the compressor 5, to pipe section 11b, which is the inlet side of the water refrigerant heat exchanger 7. On the other hand, when performing the cold air cooling operation, which will be described later, it connects pipe section 11a to pipe section 11d, which is on the air heat exchanger 10 side. An outside air temperature sensor 12, which is a means of detecting the outside air temperature, is installed in the air heat exchanger 10 and detects the outside air temperature. The refrigerant temperature sensor 13, which serves as a means for detecting the temperature of the air heat exchanger, is installed in the piping section 11d from the air heat exchanger 10 to the compressor 5, and detects the temperature of the refrigerant on the outlet side of the air heat exchanger 10.

[0025] <Heating side heat pump circuit section> The floor heating side heat pump circuit section 130B, which is the heating side heat pump, is equipped with refrigerant piping 125 that serves as a flow path for the refrigerant, and the refrigerant side flow path 7b of the water refrigerant heat exchanger 7 is connected to the refrigerant piping 125.

[0026] In detail, the refrigerant piping 125 is branched off from and connected to piping section 11b. The refrigerant piping 125 also includes piping section 125b, on the side opposite piping section 11b, which is connected to the inlet side of the water-refrigerant heat exchanger 7 (specifically, the refrigerant-side flow path 7b), and piping section 125c, which is connected to the outlet side of the water-refrigerant heat exchanger 7 (specifically, the refrigerant-side flow path 7b). Piping section 125c is equipped with a first expansion valve 8 with a fully closed function (here, an electronic expansion valve), and is in communication with piping section 11e downstream of the first expansion valve 8.

[0027] <Cooling side heat pump circuit section> The cooling-side heat pump circuit section 130C is equipped with refrigerant piping 126, which serves as a flow path for the refrigerant. An indoor heat exchanger 14, which selectively functions as a condenser or evaporator through heat exchange between the refrigerant and indoor air, is connected to the refrigerant piping 126. The indoor heat exchanger 14 is provided with an indoor fan 18 for passing indoor air through it. The indoor air sent by the operation of the indoor fan 18 undergoes heat exchange in the indoor heat exchanger 14, and the air heated or cooled by the heat exchange is supplied to the room.

[0028] In the air conditioning side heat pump circuit section 130C, in detail, the refrigerant piping 126 is connected by branching from piping section 11b, similar to piping section 125b. The refrigerant piping 126 includes piping section 126a, whose side opposite piping section 11b is connected to the inlet side (see Figure 5, etc., described later) of the indoor heat exchanger 14 during hot air heating operation, and piping section 126b, whose side opposite piping section 11e is connected to piping section 11e during hot air heating operation (see Figure 5, etc., described later). Piping section 126a is equipped with a two-way valve 16 that can open and close the communication between piping section 11b and the indoor heat exchanger 14, and piping section 126b is equipped with a second expansion valve 15 (here, an electronic expansion valve) with a fully closing function. The two-way valve 16 allows the flow of refrigerant circulating in the air conditioning side heat pump circuit section 130C to flow when opened, and blocks it when closed.

[0029] The compressor 5, four-way valve 6, air heat exchanger 10, outdoor fan 9, two-way valve 16, first and second expansion valves 8 and 15, water refrigerant heat exchanger 7, etc., are installed in the outdoor unit 4.

[0030] <Refrigerant, various detection signals, etc.> Within the refrigerant circulation circuit 130, any refrigerant such as HFC refrigerant or carbon dioxide refrigerant is used as the refrigerant, forming a heat pump cycle. In the refrigerant piping 11 of the main heat pump circuit section 130A, a discharge temperature sensor 120 is provided in the piping section 11a to detect the refrigerant discharge temperature Tout discharged from the compressor 5. The detection result of this discharge temperature sensor 120 is input to the outdoor unit control unit 44 located in the outdoor unit 4. The outdoor unit control unit 44 is mainly composed of a microcomputer equipped with a CPU, ROM, RAM, etc., and controls the operation of the air conditioning system 1 by receiving signals from various sensors in the outdoor unit 4, the indoor unit control unit 20, the floor heating remote control 36, etc., as described later.

[0031] Furthermore, with respect to the refrigerant piping 126 of the air conditioning side heat pump circuit section 130C, the indoor heat exchanger 14 is equipped with an indoor temperature sensor 19 that detects the indoor temperature Tr of the space to be air-conditioned. The detection result of this indoor temperature sensor 19 is input to the indoor unit control unit 20 provided in the indoor unit 17, and also, as appropriate, to the outdoor unit control unit 44 provided in the outdoor unit 4 (it may be received via the indoor unit control unit 20 or directly from the indoor temperature sensor 19).

[0032] The outdoor unit control unit 44 of the outdoor unit 4 and the indoor unit control unit 20 of the indoor unit 17 are connected to each other in a way that allows them to communicate with one another. Based on the detection results of each sensor, they cooperate with each other to control the operation of each device and actuator in the outdoor unit 4. In particular, the indoor unit control unit 20 switches the path through which the refrigerant flows by controlling the opening and closing operations and opening degrees of the four-way valve 6, the two-way valve 16, and the first and second expansion valves 8 and 15. As a result, the indoor unit control unit 20 performs floor heating operation by heating the floor surface of the air-conditioned space using the heat exchange terminal 27. At the same time, the indoor unit control unit 20 performs hot air heating operation by heating the indoor air of the air-conditioned space using the indoor unit 17. At the same time, the indoor unit control unit 20 performs linked operation (details will be described later) in which the floor heating operation and the hot air heating operation are linked to each other. At the same time, the indoor unit control unit 20 performs cold air cooling operation by cooling the indoor air of the air-conditioned space using the indoor unit 17. Furthermore, the indoor unit control unit 20 can selectively perform these operations.

[0033] <Indoor unit remote control> In this example, the indoor unit 17 can be operated by an indoor unit remote control 21, which is configured as a wireless remote control. Specifically, the transmitter (not shown) of the indoor unit remote control 21 and the receiver (not shown) of the indoor unit control unit 20 communicate wirelessly using infrared light or the like, and information is transmitted via one-way communication from the transmitter of the indoor unit remote control 21 to the receiver of the indoor unit control unit 20. The signal transmitted from the transmitter of the indoor unit remote control 21 is received by the receiver of the indoor unit control unit 20, and the indoor unit control unit 20 reads the information sent from the indoor unit remote control 21 and performs the instructed control. The indoor unit control unit 20 can also exchange control signals with the outdoor unit control unit 44 and transmit information via two-way communication. Furthermore, the outdoor unit control unit 44 can also obtain information corresponding to the control signals transmitted from the indoor unit remote control 21 via the indoor unit control unit 20.

[0034] The indoor unit remote control 21 is equipped with a heating switch 22 that causes the indoor unit 17 to perform a warm air heating operation that supplies warm air to the room. Furthermore, the indoor unit remote control 21 is equipped with a cooling switch 23 that causes the indoor unit 17 to perform a cool air cooling operation that supplies cool air to the room. Furthermore, the indoor unit remote control 21 is equipped with a stop switch 24 that stops the warm air heating operation or cool air cooling operation. Furthermore, the indoor unit remote control 21 is equipped with an indoor temperature setting switch 25 for setting the indoor temperature during warm air heating operation or cool air cooling operation, i.e., setting the air conditioner set temperature Tcon. Furthermore, the indoor unit remote control 21 is equipped with a display unit 26 that displays the air conditioner set temperature Tcon and various operating statuses, and a timer switch 45 for instructing the indoor unit 17 to operate using a timer.

[0035] When the heating switch 22 is operated and warm air heating operation is performed, or when the cooling switch 23 is operated and cold air cooling operation is performed, the display unit 26 displays the air conditioner set temperature Tcon, the operating status, etc. When the stop switch 24 is operated and warm air heating operation or cold air cooling operation is stopped, the display unit 26 displays the air conditioner set temperature Tcon and the operating status, and becomes invisible.

[0036] <Underfloor heating remote control> Furthermore, the heat exchange terminal 27 can be operated by a floor heating remote control 36, which in this example is mounted on the indoor wall as a wired remote control. The floor heating remote control 36 can exchange control signals with the outdoor unit control unit 44 and transmit information via bidirectional communication. As a result, the floor heating remote control 36 can acquire operating information of the indoor unit 17 (such as whether it is running or stopped).

[0037] <Details of the underfloor heating remote control> As shown in Figure 3, the floor heating remote control 36 includes a display unit 37, an on / off switch 38 for instructing the start and stop of the heat exchange terminal 27, and a timer switch 39 for instructing the heat exchange terminal 27 to operate using a timer. The floor heating remote control 36 also includes an operation changeover switch 40 for instructing the switching of the operating mode of the heat exchange terminal 27 (normal mode, save mode, etc.), a back switch 41 for returning the screen display to the previous screen, and a menu / select switch 42. The floor heating remote control 36 also includes a directional pad 43 for up, down, left, and right movement. Although not shown in the figure, the floor heating remote control 36 also contains a CPU and memory for controlling the operation of the heat exchange terminal 27 and displaying various information.

[0038] <Floor heating operation> First, the floor heating operation will be explained using Figure 4. During the floor heating operation shown in Figure 4, the four-way valve control unit 44A switches the four-way valve 6 to a position where pipe section 11a is connected to pipe section 11b and pipe section 11c is connected to pipe section 11d. The two-way valve control unit 44F also switches the two-way valve 16 to the closed state. Furthermore, the expansion valve control unit 44C controls the first expansion valve 8 to be in the open state and the second expansion valve 15 to be in the fully closed state.

[0039] As a result, a refrigerant path is formed from the discharge side piping section 11a of the compressor 5 → piping section 11b → piping section 125b → refrigerant side flow path 7b of the water refrigerant heat exchanger 7 → piping section 125c (first expansion valve 8) → piping section 11e → air heat exchanger 10 → piping section 11d → suction side piping section 11c of the compressor 5. In this way, in the water refrigerant heat exchanger 7 which functions as a condenser, the water flowing through the water side flow path 7a is heated by the heat from the refrigerant flowing through the refrigerant side flow path 7b, and high-temperature water (heated water) is supplied into the heat exchange terminal 27, warming the floor surface of the air-conditioned space.

[0040] <Indoor unit's warm air heating operation> Next, the hot air heating operation will be explained using Figure 5. During the hot air heating operation shown in Figure 5, the four-way valve control unit 44A switches the four-way valve 6 to the same side as the floor heating operation. The two-way valve control unit 44F switches the two-way valve 16 to the open state. Furthermore, the expansion valve control unit 44C controls the first expansion valve 8 to be in a fully closed state and the second expansion valve 15 to be in an open state.

[0041] As a result, a refrigerant path is formed from the discharge side piping section 11a of the compressor 5 → piping section 11b → piping section 126a → indoor heat exchanger 14 of the indoor unit 17 → piping section 126b (second expansion valve 15) → piping section 11e → air heat exchanger 10 → piping section 11d → suction side piping section 11c of the compressor 5. This allows the refrigerant to exchange heat with the indoor air in the indoor heat exchanger 14, which functions as a condenser, releasing heat and heating the air in the air-conditioned space.

[0042] <Indoor unit's cooling operation> Next, the cold air cooling operation will be explained using Figure 6. During the cold air cooling operation shown in Figure 6, the four-way valve control unit 44A switches the four-way valve 6 to the opposite side from the hot air heating operation. The two-way valve control unit 44F also switches the two-way valve 16 to the open state. Furthermore, the expansion valve control unit 44C controls the first expansion valve 8 to be in a fully closed state and the second expansion valve 15 to be in an open state.

[0043] As a result, a refrigerant path is formed from the discharge side piping section 11a of the compressor 5 → piping section 11d → air heat exchanger 10 → piping section 11e → piping section 126b (second expansion valve 15) → indoor heat exchanger 14 of the indoor unit 17 → piping section 126a → piping section 11b → suction side piping section 11c of the compressor 5. In this way, the refrigerant in the indoor heat exchanger 14, which functions as a condenser, exchanges heat with the indoor air and absorbs heat, cooling the air in the air-conditioned space.

[0044] When the indoor unit 17 is operated in cold air cooling mode, the refrigerant is cooled to a low temperature by the second expansion valve 15, causing condensation to occur on the second expansion valve 15 and the piping section 126b on the discharge side of the second expansion valve 15.

[0045] <Structure of outdoor unit 4> Next, the structure of the outdoor unit 4 will be explained based on Figures 7 to 9. 51 is the base of the bottom of the outdoor unit 4, 52 is the front panel of the outdoor unit 4 with a fan guard, 53 is the heat exchanger cover formed from the left side to part of the rear, 54 is the machine room side panel formed from the right side to the rear, 55 is the hot water unit housing that houses the water refrigerant heat exchanger 7, and 56 is the bottom of the hot water unit housing 55 and also the hot water unit base that divides the outdoor unit 4 into upper and lower parts. The housing of the outdoor unit 4 consists of the bottom base 51, the front panel 52, the heat exchanger cover 53, the machine room side panel 54, the hot water unit housing 55, and the hot water unit base 56.

[0046] The outdoor unit 4 is equipped with a blower room 57 where a blower fan is located, a machine room 58 where mechanical parts such as the first expansion valve 8, the second expansion valve 15, and the compressor 5 are located, and a partition plate 59 that separates the blower room 57 and the machine room 58.

[0047] Furthermore, at least the compressor 5, the first expansion valve 8, and the second expansion valve 15 are arranged in the machine room 58. By placing the compressor 5, which is a relatively large mechanical component, approximately in the center of the machine room 58, and arranging the first expansion valve 8 and the second expansion valve 15 vertically in the corner of the outdoor unit 4 where the distance between the compressor 5 and the machine room side plate 54 or front plate 52 is relatively large, the first expansion valve 8 and the second expansion valve 15 can be placed using the space left over when the compressor 5 is installed, thereby providing a space-saving outdoor unit 4.

[0048] Next, the positions of the first expansion valve 8 and the second expansion valve 15 located in the machine room 58 will be described. The position of the second expansion valve 15 in the air conditioning side heat pump circuit section 130C is located below the position of the first expansion valve 8 in the floor heating side heat pump circuit section 130B.

[0049] As a result, by positioning the second expansion valve 15 below the first expansion valve 8, it is possible to prevent condensation water generated from the second expansion valve 15 during cold air cooling operation from dripping onto the first expansion valve 8, thereby suppressing the occurrence of malfunctions and defects.

[0050] Next, the details and location of the compressor 5 will be described in detail. The compressor 5 is a so-called sealed rotary compressor, and it is equipped with a power supply terminal 60 to which various sensors and lead wires for supplying power are connected.

[0051] If the power supply terminal 60 is exposed to water, rust and electrical leakage may occur, potentially causing the compressor 5 to malfunction. Therefore, the second expansion valve 15 is positioned below the power supply terminal 60 of the compressor 5.

[0052] This prevents condensation from dripping onto the power supply terminal 60 even if condensation occurs on the surface of the second expansion valve 15 during cold air cooling operation, thereby preventing malfunctions such as short circuits.

[0053] As explained above, the first expansion valve 8, which is part of the floor heating side heat pump circuit section 130B and is dedicated to heating, is unlikely to generate condensation. Therefore, even if it is positioned above the second expansion valve 15, there is no need to worry about condensation dripping down. By not placing mechanical parts in an area where dripping of condensation from the second expansion valve 15 is expected, malfunctions and failures due to water exposure can be prevented.

[0054] It should be noted that the present invention is not limited to this embodiment, and modifications are permitted without altering the gist of the invention. For example, although the heat exchange terminal 27 in this embodiment was described as a so-called floor heating panel that heats the floor surface, it may also be a hot water room heater, a fan coil, or a second indoor unit different from the indoor unit 17. It is sufficient if it is a heating-only unit that cannot perform cooling operations and does not cause condensation to drip onto the first expansion valve 8.

[0055] Furthermore, although the indoor unit 17 was described as being capable of both hot air heating and cold air cooling, an indoor unit 17 that is only capable of cold air cooling is also acceptable.

[0056] Furthermore, the base 51 on the bottom surface is equipped with a guide section that directs condensation water to the outside of the outdoor unit 4. By positioning the guide section near the bottom of the second expansion valve 15 and the discharge piping section 126b of the second expansion valve 15, the water can be quickly drained to the outside of the outdoor unit 4 without causing water to spill onto mechanical parts.

[0057] In this embodiment, the outdoor unit 4 is divided into upper and lower sections, and the water-refrigerant heat exchanger 7 is placed in the upper hot water unit storage section 55, but it may also be placed in the blower room 57. [Explanation of Symbols]

[0058] 1. Air conditioning system 4 Outdoor unit 5. Compressor 7 Water refrigerant heat exchanger 8 First expansion valve 10. Air heat exchanger 14 Indoor heat exchanger 15 Second expansion valve 17 Indoor unit 27 Heat exchange terminals 33 Hot water circuit 57 Blower room 58 Machine room 59 Partition Plate 60 Power supply terminal 130 Refrigerant circulation circuit

Claims

1. Inside the enclosure is a compressor that compresses the refrigerant, An air heat exchanger that performs heat exchange between the refrigerant and the outside air, A heating cycle circuit connected to a heating terminal that performs heating operation, and having a first expansion valve, It is connected to a cooling terminal that performs cooling operation and comprises a cooling cycle circuit having a second expansion valve, The interior of the aforementioned enclosure is divided into a blower room and a machine room by a partition plate. The machine room is equipped with the compressor, the first expansion valve, and the second expansion valve. The aforementioned housing comprises a base that forms the bottom surface, The base has four edges, and extending upwards from each edge, A heat pump outdoor unit having a guide portion arranged on the base for guiding condensation water generated inside the housing to the outside of the housing, The second expansion valve is positioned lower than the first expansion valve. The lower end of the piping connected to the suction side of the second expansion valve and extending downward is positioned below the upper end of the rising portion. A heat pump outdoor unit characterized in that the guide portion is positioned near the lower part of the piping connected to the discharge side of the second expansion valve.

2. The heat pump outdoor unit according to claim 1, characterized in that the position of the second expansion valve is located below the power supply terminal for the compressor provided on the compressor.

3. The heat pump outdoor unit according to claim 2, characterized in that the heating cycle circuit and the cooling cycle circuit are configured to share the compressor and the air heat exchanger.

4. The heating cycle circuit is connected to the heating terminal via a water-refrigerant heat exchanger provided in a hot water circuit that uses water as a refrigerant. The heat pump outdoor unit according to claim 2 or 3, characterized in that the cooling cycle circuit is connected to an indoor heat exchanger that exchanges heat with indoor air provided in the cooling terminal.

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