Heat pump system

Abstract

The application relates to the technical field of heat pump systems, and particularly provides a heat pump system, which aims to solve the problem of energy waste caused by waste heat emission during air conditioner refrigeration. For the purpose, the heat pump system comprises a main circuit provided with a compressor, a first four-way valve, an indoor heat exchanger, an outdoor heat exchanger and a second four-way valve; a first branch circuit connected with the main circuit at two ends of the first four-way valve and the second four-way valve and the compressor; a second branch circuit connected with the main circuit at two ends of the first four-way valve and the compressor and the second four-way valve; a third branch circuit connected with the main circuit at two ends of the second four-way valve and the outdoor heat exchanger and the indoor heat exchanger; a water-fluorine heat exchanger for heat exchange with a user water module is arranged on the third branch circuit; when the heat pump system recovers heat in a refrigeration mode, the indoor heat exchanger is connected with the first branch circuit; the second branch circuit is connected with the water-fluorine heat exchanger, and the outdoor heat exchanger is disconnected. The application can recover waste heat generated in the refrigeration mode.

Description

Technical Field

[0001] This application relates to the field of heat pump system technology, and specifically provides a heat pump system. Background Technology

[0002] "Air-to-Air and Water-to-Water" heat pump air conditioning systems are widely used in the HVAC field due to their flexibility and high efficiency. This system employs an independent design for the refrigerant and water systems, typically including an indoor air-to-air heat exchanger, an outdoor air-to-air heat exchanger, and a water-to-water heat exchanger. The indoor air-to-air heat exchanger is used for air conditioning cooling / heating, the outdoor air-to-air heat exchanger is used for air-source heat exchange, and the water-to-water heat exchanger is connected to the underfloor heating system via water circulation. This structure allows it to simultaneously meet the needs of air conditioning cooling / heating and underfloor heating, providing high operational flexibility. However, during air conditioning cooling, the outdoor air-to-air heat exchanger releases a significant amount of waste heat, resulting in some energy waste.

[0003] Accordingly, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0004] This application aims to solve the aforementioned technical problem, namely, that during air conditioning cooling, the outdoor air-refrigerant heat exchanger emits a large amount of waste heat, resulting in a certain amount of energy waste.

[0005] This application provides a heat pump system, comprising: a main circuit, wherein a compressor, a first four-way valve, an indoor heat exchanger, an outdoor heat exchanger, and a second four-way valve are sequentially arranged; a first branch, wherein a first end is connected to the first four-way valve, and a second end is connected to the main circuit between the second four-way valve and the compressor; a second branch, wherein a first end is connected to the main circuit between the first four-way valve and the compressor, and a second end is connected to the second four-way valve; a third branch, wherein a first end is connected to the second four-way valve, and a second end is connected to the main circuit between the outdoor heat exchanger and the indoor heat exchanger; a water-fluorine heat exchanger is arranged on the third branch, and the water-fluorine heat exchanger is connected to a user water module for heat exchange; when the heat pump system recovers heat in cooling mode, the first four-way valve switches to connect the indoor heat exchanger to the first branch; the second four-way valve switches to connect the second branch to the water-fluorine heat exchanger, and the outdoor heat exchanger is disconnected, so as to recover the heat of the water-fluorine heat exchanger through the user water module.

[0006] When the heat pump system recovers heat in cooling mode, the first four-way valve switches to connect the indoor heat exchanger to the first branch; the second four-way valve switches to connect the second branch to the water-fluorine heat exchanger, and the outdoor heat exchanger is disconnected. With this configuration, the high-temperature refrigerant discharged from the compressor outlet flows sequentially through the second branch and the second four-way valve before entering the water-fluorine heat exchanger. In the water-fluorine heat exchanger, the refrigerant releases heat to the user's water module, which recovers the heat from the water-fluorine heat exchanger. Then, the refrigerant flows sequentially through the indoor heat exchanger, the first four-way valve, and the first branch before returning to the compressor to complete the refrigerant cycle. This application, through the design of the heat pump system piping, allows the heat pump system to use a water-fluorine heat exchanger instead of the outdoor heat exchanger in cooling mode, and utilizes the user's water module to recover the waste heat generated by the water-fluorine heat exchanger, which is beneficial for improving energy utilization efficiency.

[0007] In some embodiments, the water-fluorine heat exchanger includes a refrigerant pipeline and a recovery pipeline for heat exchange contact, the refrigerant pipeline being connected in series to the third branch, and the heat pump system further includes a water circulation pipeline, the recovery pipeline being connected to the user water module through the water circulation pipeline.

[0008] With this setup, the recovery pipeline, water circulation pipeline, and user water module are connected to form a closed water circulation pipeline. By flowing water between the user water module and the recovery pipeline, the heat / cooling capacity of the refrigerant in the refrigerant pipeline is transferred to the user water module. The recovered heat / cooling capacity is reused in the user water module, which helps to improve energy utilization.

[0009] In some embodiments, the user water module includes a hot water device connected to the water circulation pipeline when the heat pump system recovers heat in cooling mode.

[0010] With this setup, when the heat pump system is in cooling mode and recovering heat, the hot water device is connected to the water circulation pipeline. The water in the hot water device is heated to complete the heat recovery, and the hot water device can provide hot water to the user.

[0011] In some embodiments, when the heat pump system recovers cooling capacity in heating mode, the first four-way valve switches to connect the compressor's exhaust port to the indoor heat exchanger; the second four-way valve switches to connect the water-fluorine heat exchanger to the compressor's suction port, and the outdoor heat exchanger is disconnected.

[0012] With this configuration, the high-temperature refrigerant discharged from the compressor outlet flows sequentially through the first four-way valve, the indoor heat exchanger, and the water-refrigerant heat exchanger. In the water-refrigerant heat exchanger, the refrigerant releases its cooling capacity to the user's water module, which then recovers the cooling capacity from the water-refrigerant heat exchanger. The refrigerant then flows sequentially through the second four-way valve back to the compressor's return port, completing the refrigerant cycle. In the indoor heat exchanger, the refrigerant exchanges heat with the indoor air to provide heat to the room.

[0013] In some embodiments, the user water module further includes a refrigeration device connected in parallel with the hot water device. When the heat pump system recovers cooling capacity in heating mode, the refrigeration device is connected to the water circulation pipeline, and the hot water device is disconnected, so as to recover the cooling capacity of the water-fluoride heat exchanger through the user water module.

[0014] With this setup, when the heat pump system is in heating mode and recovering cooling energy, the refrigeration unit is connected to the water circulation pipeline, and the water in the refrigeration unit is cooled to complete the cooling energy recovery. The refrigeration unit can provide users with a low-temperature refrigeration environment; for example, the refrigeration unit is a refrigerator box used to store vegetables or beverages.

[0015] In some embodiments, the first four-way valve includes a first port, a second port, a third port, and a fourth port. The first port is connected to the indoor heat exchanger, the second port is connected to the exhaust port of the compressor, the third port is connected to the first branch, and the fourth port is in a closed state.

[0016] By switching the connection status of each port in the first four-way valve, the connection status of each refrigerant flow path can be switched, thereby realizing various modes of the heat pump system.

[0017] In some embodiments, the second four-way valve includes a fifth port, a sixth port, a seventh port, and an eighth port. The fifth port is connected to the water-fluorine heat exchanger, the sixth port is connected to the second branch, the seventh port is connected to the compressor's suction port, and the eighth port is connected to the outdoor heat exchanger.

[0018] By switching the connection status of each port in the second four-way valve, the connection status of each refrigerant flow path can be switched, thereby realizing various modes of the heat pump system.

[0019] In some embodiments, when the heat pump system recovers heat in cooling mode, the first interface is connected to the third interface, the fifth interface is connected to the sixth interface, and the seventh interface is connected to the eighth interface.

[0020] This configuration allows for the refrigerant flow path required when the heat pump system recovers heat in cooling mode.

[0021] In some embodiments, when the heat pump system recovers cooling energy in heating mode, the first interface and the second interface are connected, the sixth interface and the eighth interface are connected, and the fifth interface and the seventh interface are connected.

[0022] This configuration allows for the refrigerant flow path required when the heat pump system recovers cooling capacity in heating mode.

[0023] In some embodiments, the heat pump system further includes: a first throttling valve disposed on the main circuit and located between the outdoor heat exchanger and the third branch; the outdoor heat exchanger can be disconnected / connected by closing / opening the first throttling valve; and a second throttling valve disposed on the third branch, the water-fluoride heat exchanger can be disconnected / connected by closing / opening the second throttling valve.

[0024] The outdoor heat exchanger can be switched on / off by closing / opening the first throttle valve. The water-fluoride heat exchanger can be switched on / off by closing / opening the second throttle valve. Attached Figure Description

[0025] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0026] Figure 1 This is a schematic diagram of the heat pump system of this application;

[0027] Figure 2 yes Figure 1 A schematic diagram of the refrigerant flow path when a medium-temperature heat pump system recovers heat in cooling mode;

[0028] Figure 3 yes Figure 1 A schematic diagram of the refrigerant flow path when a medium-temperature heat pump system recovers cooling energy in heating mode.

[0029] Figure label:

[0030] 1. Main circuit; 2. Compressor; 3. First four-way valve; 301. First interface; 302. Second interface; 303. Third interface; 304. Fourth interface; 4. Indoor heat exchanger; 5. Outdoor heat exchanger; 6. Second four-way valve; 601. Fifth interface; 602. Sixth interface; 603. Seventh interface; 604. Eighth interface; 7. First branch; 8. Second branch; 9. Third branch; 10. Water-fluoride heat exchanger; 11. User water module; 12. Water circulation pipeline; 13. First throttle valve; 14. Second throttle valve. Detailed Implementation

[0031] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0032] It should be noted that, in the description of this application, "module" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memory, and may also include software components, such as program code, or a combination of software and hardware. The term "A and / or B" represents all possible combinations of A and B, such as only A, only B, or A and B.

[0033] "Air-to-Air and Water-to-Water" heat pump air conditioning systems are widely used in the HVAC field due to their flexibility and high efficiency. This system employs an independent design for the refrigerant and water systems, typically including an indoor air-to-air heat exchanger, an outdoor air-to-air heat exchanger, and a water-to-water heat exchanger. The indoor air-to-air heat exchanger is used for air conditioning cooling / heating, the outdoor air-to-air heat exchanger is used for air-source heat exchange, and the water-to-water heat exchanger is connected to the underfloor heating system via water circulation. This structure allows it to simultaneously meet the needs of air conditioning cooling / heating and underfloor heating, providing high operational flexibility. However, during air conditioning cooling, the outdoor air-to-air heat exchanger releases a significant amount of waste heat, resulting in some energy waste.

[0034] To improve energy efficiency, this application provides a heat pump system.

[0035] Combination Figure 1 and Figure 2 As shown, the heat pump system provided in this application includes a main circuit 1, a first branch circuit 7, a second branch circuit 8, and a third branch circuit 9.

[0036] The main circuit 1 is equipped with a compressor 2, a first four-way valve 3, an indoor heat exchanger 4, an outdoor heat exchanger 5, and a second four-way valve 6 in sequence.

[0037] The first end of the first branch 7 is connected to the first four-way valve 3, and the second end of the first branch 7 is connected to the main circuit 1 located between the second four-way valve 6 and the compressor 2.

[0038] The first end of the second branch 8 is connected to the main circuit 1 between the first four-way valve 3 and the compressor 2, and the second end of the second branch 8 is connected to the second four-way valve 6.

[0039] The first end of the third branch 9 is connected to the second four-way valve 6, and the second end of the third branch 9 is connected to the main circuit 1 between the outdoor heat exchanger 5 and the indoor heat exchanger 4. A water-fluoride heat exchanger 10 is installed on the third branch 9, and the water-fluoride heat exchanger 10 is connected to the user water module 11 for heat exchange.

[0040] Combination Figure 2As shown, when the heat pump system recovers heat in cooling mode, the first four-way valve 3 switches to connect the indoor heat exchanger 4 to the first branch 7. The second four-way valve 6 switches to connect the second branch 8 to the water-fluorine heat exchanger 10, and the outdoor heat exchanger 5 is disconnected, so that the heat from the water-fluorine heat exchanger 10 can be recovered through the user water module 11. The outdoor heat exchanger can be disconnected by opening the first throttle valve 13.

[0041] When the heat pump system recovers heat in cooling mode, the first four-way valve 3 switches to connect the indoor heat exchanger 4 to the first branch 7, and the second four-way valve 6 switches to connect the second branch 8 to the water-refrigerant heat exchanger, while the outdoor heat exchanger 5 is disconnected. With this configuration, the high-temperature refrigerant discharged from the compressor 2 flows sequentially through the second branch 8 and the second four-way valve 6 before entering the water-refrigerant heat exchanger 10. In the water-refrigerant heat exchanger 10, the refrigerant releases heat to the user's water module 11, which then recovers the heat from the water-refrigerant heat exchanger 10. The refrigerant then flows sequentially through the indoor heat exchanger 4, where it exchanges heat with the indoor air to provide cooling. Finally, the refrigerant returns to the compressor's return port after passing through the first four-way valve 3 and the first branch 7, completing the refrigerant cycle. This application, through the design of the heat pump system piping, enables the heat pump system to use the water-fluorine heat exchanger 10 to replace the outdoor heat exchanger in cooling mode, and to use the user water module 11 to recover the waste heat generated by the water-fluorine heat exchanger 10, which is beneficial to improving energy utilization.

[0042] When the heat pump system operates in cooling mode and heat recovery is not required, the first four-way valve 3 connects the indoor heat exchanger 4 to the first branch 7, and the second four-way valve 6 connects the second branch 8 to the outdoor heat exchanger 5. The outdoor heat exchanger 5 is connected to the main circuit 1, and the water-refrigerant heat exchanger 10 is disconnected. The refrigerant flow path is as follows: the refrigerant discharged from the compressor's exhaust port flows sequentially through the second branch 8, then through the second four-way valve 6 into the outdoor heat exchanger 5, where it releases heat before entering the indoor heat exchanger 4, then through the first four-way valve 3 back into the first branch 7, and finally returns to the compressor 2's suction port. In this way, the indoor heat exchanger 4 provides cooling to the indoor space, while waste heat is discharged outdoors through the outdoor heat exchanger 5.

[0043] When the heat pump system operates in heating mode and no refrigerant recovery is required, the first four-way valve 3 connects the indoor heat exchanger 4 to the exhaust port of the compressor 2, and the second four-way valve 6 connects the outdoor heat exchanger 5 to the suction port of the compressor 2. The outdoor heat exchanger 5 is connected to the main circuit 1, and the water-refrigerant heat exchanger 10 is disconnected. The refrigerant flow path is as follows: the refrigerant discharged from the exhaust port of the compressor 2 flows sequentially through the first four-way valve 3, the indoor heat exchanger 4, the outdoor heat exchanger 5, and the second four-way valve 6 before returning to the suction port of the compressor 2. In this way, heat is provided to the indoor space through the indoor heat exchanger 4, while waste heat is discharged outdoors through the outdoor heat exchanger 5.

[0044] In some embodiments, combined with Figure 3 As shown, when the heat pump system recovers cooling capacity in heating mode, the first four-way valve 3 switches to connect the exhaust port of compressor 2 to indoor heat exchanger 4. The second four-way valve 6 switches to connect water-refrigerant heat exchanger 10 to the suction port of compressor 2, and outdoor heat exchanger 5 is disconnected. The high-temperature refrigerant discharged from the exhaust port of compressor 2 flows sequentially through the first four-way valve 3, indoor heat exchanger 4, and water-refrigerant heat exchanger 10. In water-refrigerant heat exchanger 10, the refrigerant releases cooling capacity to the user water module 11, which recovers the cooling capacity of water-refrigerant heat exchanger 10. Then, the refrigerant flows sequentially through the second four-way valve 6 and returns to the return port of compressor 2, completing the refrigerant cycle. The refrigerant exchanges heat with indoor air in indoor heat exchanger 4 to provide heat to the room.

[0045] In some embodiments, the water-fluorine heat exchanger 10 includes a refrigerant pipeline and a recovery pipeline for heat exchange contact, with the refrigerant pipeline connected in series to a third branch 9. The refrigerant in the refrigerant pipeline can exchange heat with the heat exchange medium in the recovery pipeline. The heat pump system also includes a water circulation pipeline 12, through which the recovery pipeline is connected to the user water module 11. Specifically, the recovery pipeline includes a first end and a second end, the user water module 11 includes an inlet and an outlet, the water circulation pipeline can connect the first end of the recovery pipeline to the inlet of the user water module 11, and the water circulation pipeline can connect the second end of the recovery pipeline to the outlet of the user water module 11. Thus, the recovery pipeline, the water circulation pipeline 12, and the user water module 11 are connected to form a closed water circulation pipeline. By flowing water between the user water module 11 and the recovery pipeline, the heat / cold energy of the refrigerant in the refrigerant pipeline is transferred to the user water module 11, and the recovered heat / cold energy is reused in the user water module 11, which is beneficial to improving energy utilization efficiency.

[0046] In some embodiments, the user water module 11 includes a hot water device. When the heat pump system recovers heat in cooling mode, the hot water device is connected to the water circulation pipe 12. When the heat pump system recovers heat in cooling mode, the water in the hot water device is heated to complete heat recovery, and the hot water device can provide hot water to the user.

[0047] Optionally, the hot water device includes a hot water storage tank, through which hot water can be stored so that users can still use the stored hot water even when the heat pump system is turned off.

[0048] In some embodiments, the user water module also includes a refrigeration unit connected in parallel with the hot water unit. This parallel connection reduces interference between the two. When the heat pump system recovers cooling capacity in heating mode, the refrigeration unit is connected to the water circulation pipe 12, and the hot water unit is disconnected, allowing the user water module 11 to recover the cooling capacity of the water-refrigerant heat exchanger 10. When the heat pump system recovers cooling capacity in heating mode, the refrigeration unit is connected to the water circulation pipe 12, and the water in the refrigeration unit is cooled to complete the cooling capacity recovery. The refrigeration unit can provide a low-temperature refrigeration environment for users; for example, the refrigeration unit can be a refrigerator for storing vegetables or beverages.

[0049] In some embodiments, combined with Figure 2 As shown, the first four-way valve 3 includes a first port 301, a second port 302, a third port 303, and a fourth port 304. The first port 301 is connected to the indoor heat exchanger 4, the second port 302 is connected to the exhaust port of the compressor 2, the third port 303 is connected to the first branch 7, and the fourth port 304 is in a closed state. By switching the connection states of each port in the first four-way valve 3, the connection states of each refrigerant flow path can be switched, thereby realizing various modes of the heat pump system.

[0050] In some embodiments, the second four-way valve 6 includes a fifth port 601, a sixth port 602, a seventh port 603, and an eighth port 604. The fifth port 601 is connected to the water-refrigerant heat exchanger 10, the sixth port 602 is connected to the second branch 8, the seventh port 603 is connected to the suction port of the compressor 2, and the eighth port 604 is connected to the outdoor heat exchanger 5. By switching the connection states of each port in the second four-way valve 6, the connection states of each refrigerant flow path can be switched, thereby realizing various modes of the heat pump system.

[0051] In some embodiments, combined with Figure 2 As shown, when the heat pump system recovers heat in cooling mode, the first interface 301 and the third interface 303 are connected, the fifth interface 601 and the sixth interface 602 are connected, and the seventh interface 603 and the eighth interface 604 are connected. By connecting the first interface 301 and the third interface 303, the indoor heat exchanger 4 can be connected to the first branch 7, at which time the second interface 302 and the fourth interface 304 are connected. By connecting the fifth interface 601 and the sixth interface 602, and the seventh interface 603 and the eighth interface 604, the second branch 8 can be connected to the water-refrigerant heat exchanger 10. Simultaneously, since the outdoor heat exchanger 5 is in an open-circuit state, refrigerant will not flow through the outdoor heat exchanger. Thus, combined with... Figure 2As shown, the high-temperature refrigerant discharged from the exhaust port of compressor 2 flows sequentially through the second branch 8 and the second four-way valve 6 before entering the water-fluorine heat exchanger 10. In the water-fluorine heat exchanger 10, the refrigerant releases heat to the user water module 11, and the user water module 11 recovers the heat from the water-fluorine heat exchanger 10. Then, the refrigerant flows sequentially through the indoor heat exchanger 4, where it exchanges heat with the indoor air to provide cooling for the room. Finally, the refrigerant returns to the return port of compressor 2 after passing through the first four-way valve 3 and the first branch 7, completing the refrigerant cycle.

[0052] In some embodiments, combined with Figure 3 As shown, when the heat pump system recovers cooling capacity in heating mode, the first interface 301 and the second interface 302 are connected, the sixth interface 602 and the eighth interface 604 are connected, and the fifth interface 601 and the seventh interface 603 are connected. By connecting the first interface 301 and the second interface 302, the exhaust port of the compressor 2 can be connected to the indoor heat exchanger 4; by connecting the sixth interface 602 and the eighth interface 604, and the fifth interface 601 and the seventh interface 603, the water-refrigerant heat exchanger 10 can be connected to the suction port of the compressor 2. At the same time, since the outdoor heat exchanger 5 is in an open-circuit state, the refrigerant will not flow through the outdoor heat exchanger. Thus, the high-temperature refrigerant discharged from the compressor 2 outlet flows sequentially through the first four-way valve 3, the indoor heat exchanger 4, and the water-fluorine heat exchanger 10. In the water-fluorine heat exchanger 10, the refrigerant releases its cooling capacity to the user's water module 11, which then recovers the cooling capacity from the water-fluorine heat exchanger 10. The refrigerant then flows sequentially through the second four-way valve 6 and returns to the compressor's return port, completing the refrigerant cycle. The refrigerant exchanges heat with the indoor air in the indoor heat exchanger 4 to provide heat to the room.

[0053] In some embodiments, combined with Figures 1 to 3 As shown, the heat pump system also includes a first throttling valve 13, which is installed on the main circuit 1 and located between the outdoor heat exchanger 5 and the third branch 9. The outdoor heat exchanger 5 can be disconnected / connected by closing / opening the first throttling valve 13.

[0054] In some embodiments, combined with Figures 1 to 3 As shown, the heat pump system also includes a second throttling valve 14, which is installed on the third branch 9. By closing / opening the second throttling valve 14, the water-fluorine heat exchanger 10 can be disconnected / connected.

[0055] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A heat pump system, characterized in that, The heat pump system includes: The main circuit (1) is equipped with a compressor (2), a first four-way valve (3), an indoor heat exchanger (4), an outdoor heat exchanger (5), and a second four-way valve (6) in sequence. The first branch (7) has its first end connected to the first four-way valve (3) and its second end connected to the main circuit (1) between the second four-way valve (6) and the compressor (2); The second branch (8) has its first end connected to the main circuit (1) between the first four-way valve (3) and the compressor (2), and its second end connected to the second four-way valve (6); The third branch (9) has its first end connected to the second four-way valve (6) and its second end connected to the main circuit (1) between the outdoor heat exchanger (5) and the indoor heat exchanger (4); a water-fluoride heat exchanger (10) is provided on the third branch (9), and the water-fluoride heat exchanger (10) is connected to the user water module (11) for heat exchange. When the heat pump system recovers heat in cooling mode, the first four-way valve (3) switches to connect the indoor heat exchanger (4) to the first branch (7); the second four-way valve (6) switches to connect the second branch (8) to the water-fluorine heat exchanger (10), and the outdoor heat exchanger (5) is disconnected so that the heat of the water-fluorine heat exchanger (10) can be recovered through the user water module (11).

2. The heat pump system according to claim 1, characterized in that, The water-fluorine heat exchanger (10) includes a refrigerant pipeline and a recovery pipeline for heat exchange contact. The refrigerant pipeline is connected in series to the third branch (9). The heat pump system also includes a water circulation pipeline (12). The recovery pipeline is connected to the user water module (11) through the water circulation pipeline (12).

3. The heat pump system according to claim 2, characterized in that, The user water module (11) includes a hot water device. When the heat pump system recovers heat in cooling mode, the hot water device is connected to the water circulation pipeline (12).

4. The heat pump system according to claim 3, characterized in that, When the heat pump system recovers cooling capacity in heating mode, the first four-way valve (3) switches to connect the exhaust port of the compressor (2) to the indoor heat exchanger (4); the second four-way valve (6) switches to connect the water-fluorine heat exchanger (10) to the suction port of the compressor (2), and the outdoor heat exchanger is disconnected.

5. The heat pump system according to claim 4, characterized in that, The user water module also includes a refrigeration device connected in parallel with the hot water device. When the heat pump system recovers cold energy in heating mode, the refrigeration device is connected to the water circulation pipeline (12), and the hot water device is disconnected, so as to recover the cold energy of the water-fluoride heat exchanger (10) through the user water module (11).

6. The heat pump system according to claim 4, characterized in that, The first four-way valve (3) includes a first port (301), a second port (302), a third port (303) and a fourth port (304). The first port (301) is connected to the indoor heat exchanger (4), the second port (302) is connected to the exhaust port of the compressor (2), the third port (303) is connected to the first branch (7), and the fourth port (304) is in a closed state.

7. The heat pump system according to claim 6, characterized in that, The second four-way valve (6) includes a fifth port (601), a sixth port (602), a seventh port (603), and an eighth port (604). The fifth port (601) is connected to the water-fluorine heat exchanger (10), the sixth port (602) is connected to the second branch (8), the seventh port (603) is connected to the suction port of the compressor (2), and the eighth port (604) is connected to the outdoor heat exchanger.

8. The heat pump system according to claim 7, characterized in that, When the heat pump system recovers heat in cooling mode, the first interface (301) and the third interface (303) are connected, the fifth interface (601) and the sixth interface (602) are connected, and the seventh interface (603) and the eighth interface (604) are connected.

9. The heat pump system according to claim 7, characterized in that, When the heat pump system recovers cooling capacity in heating mode, the first interface (301) and the second interface (302) are connected, the sixth interface (602) and the eighth interface (604) are connected, and the fifth interface (601) and the seventh interface (603) are connected.

10. The heat pump system according to any one of claims 6 to 9, characterized in that, The heat pump system also includes: The first throttle valve (13) is installed on the main circuit (1) and located between the outdoor heat exchanger (5) and the third branch (9); the outdoor heat exchanger (5) can be disconnected / connected by closing / opening the first throttle valve (13); The second throttle valve (14) is installed on the third branch (9). By closing / opening the second throttle valve (14), the water-fluoride heat exchanger (10) can be controlled to disconnect / connect.

Images