Heat pump system

Abstract

The utility model relates to the technical field of heat pump, concretely relates to a kind of heat pump system, and the heat pump system includes: heat pump basic module, at least two evaporating modules mutually in parallel, evaporating module has with the defrosting state of first side, third side access, and with the evaporation state of second side, third side access.This embodiment is parallelly connected design to evaporating module and can realize defrosting in turn, when certain evaporating module or several evaporating modules in it are in defrosting state, other module still is in evaporation state.Defrosting and evaporation state are independently switched, avoid full system cold and hot switching, heating capacity will not suddenly drop due to defrosting, so that the compressor in heat pump basic module does not need to stop, so the problem that heat pump system is switched from heating mode to defrosting mode, needs to stop heating, causes the exhaust loss of compressor and the energy loss caused by stoppage.

Description

Technical Field

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

[0002] When a heat pump is used for heating, the outdoor heat exchanger absorbs heat from the outdoor environment. At this time, the refrigerant temperature inside the outdoor heat exchanger is much lower than the outdoor air temperature, especially in cold weather, potentially dropping below 0°C. When water vapor in the outdoor air encounters the surface of the outdoor heat exchanger, it quickly condenses into frost.

[0003] Because frost is a poor conductor of heat, with a thermal conductivity much lower than that of metal, it directly hinders the heat exchange between outdoor air and the refrigerant in the outdoor heat exchanger. As a result, the evaporator cannot effectively absorb outdoor heat, and the heat pump delivers significantly less heat to the room. This slows down the indoor heating process or even stops the heating altogether, severely impacting the user experience.

[0004] Although some products have a defrost mode that uses a four-way valve to switch between indoor and outdoor evaporators and condensers for cooling and heating, allowing defrosting when the outdoor heat exchanger is frosted over, the heat pump needs to stop heating during the switching process, which can also cause compressor exhaust losses. Utility Model Content

[0005] In view of this, the present invention provides a heat pump system to solve the problem that when the heat pump system switches from heating mode to defrost mode, it needs to stop heating and also causes compressor exhaust loss.

[0006] In a first aspect, this utility model provides a heat pump system, which includes:

[0007] The heat pump basic module is equipped with a first side, a second side, and a third side;

[0008] At least two evaporation modules are connected in parallel. Each evaporation module is provided with a first interface, a second interface, a third interface, and a fourth interface. The first interface is connected to a first side, the second interface is connected to a second side, the third interface is connected to a third side, and the fourth interface is connected to a third side. The refrigerant is throttled and depressurized when flowing through the third interface.

[0009] The evaporation module has a defrosting state connected to the first and third sides, and an evaporation state connected to the second and third sides.

[0010] Beneficial effects: This embodiment uses a parallel design for the evaporation modules, enabling alternating defrosting. When one or more evaporation modules are in defrosting mode, the others remain in evaporation mode. Independent switching between defrosting and evaporation modes avoids system-wide heating / cooling transitions, preventing a sudden drop in heating capacity during defrosting. This eliminates the need for the compressor in the heat pump's basic module to stop, thus solving the problem of compressor exhaust losses and energy losses due to shutdown when switching from heating to defrosting mode.

[0011] In one alternative implementation, the evaporation module includes:

[0012] The evaporator is equipped with a first port and a second port;

[0013] The valve assembly is equipped with a connection port, a first interface, and a second interface, with the connection port connected to the first interface.

[0014] The first valve has one end connected to the second port and the other end configured as the fourth interface.

[0015] A first expansion valve, one end of which is connected to a second port, and the other end of which is configured as a third interface;

[0016] The evaporation module has a defrosting state in which the connection port, the first interface, the evaporator, and the first valve are connected, and an evaporation state in which the connection port, the second interface, the evaporator, and the first expansion valve are connected.

[0017] Beneficial effects: In this embodiment, during evaporation, the first expansion valve throttles and reduces pressure, ensuring efficient evaporation and heat absorption of the refrigerant within the evaporator, meeting the core requirements of heat pump evaporation and improving heat exchange efficiency. During defrosting, the valve assembly connects to the first side, allowing high-temperature refrigerant to enter the evaporator for defrosting. The defrosting liquid flows through the first valve and the fourth interface to the third side, thus circulating with other refrigerants to other evaporation modules, avoiding direct backflow to the compressor and resolving the risk of liquid slugging. Furthermore, the coordination between the valve assembly and the valves ensures precise and controllable mode switching, preventing energy loss due to state inconsistencies.

[0018] In one optional embodiment, the valve assembly is a three-way valve, which is provided with the connection port, the first interface, and the second interface.

[0019] In one alternative implementation, the valve assembly includes:

[0020] The second valve has one end connected to the first port and the other end connected to the first side.

[0021] The third valve has one end connected to the first port and the other end connected to the second side.

[0022] Beneficial effects: In this embodiment, the second and third valves are controlled independently. During defrosting, only the second valve opens, connecting the high-temperature gas on the first side. During evaporation, only the third valve opens, connecting the low-pressure gas on the second side, thus strictly isolating the high and low pressure channels and preventing cross-flow. Furthermore, independent valves can improve switching accuracy, reduce pressure fluctuations, and reduce energy loss. They can also prevent the mixing of high-temperature, high-pressure gas with the low-pressure side, which would lead to a decrease in compression efficiency, thereby improving system stability.

[0023] In one alternative implementation, the first valve is a first check valve, which is normally open in the direction of outflow from the second port.

[0024] Beneficial effects: In this embodiment, the first one-way valve only allows liquid to flow from the second port of the evaporator to the third side, that is, to other evaporation modules, preventing reverse flow. This ensures that all the liquid generated during defrosting is guided to the evaporation modules that are still in the evaporation state for evaporation, avoiding liquid accumulation or backflow. This improves the utilization efficiency of the defrosting liquid, ensures that the liquid flows smoothly to other evaporation modules for evaporation, and enhances defrosting efficiency and system safety.

[0025] In one alternative implementation, the heat pump base module is a single-function heat pump module.

[0026] In one optional implementation, the single-function heat pump module includes:

[0027] A first compressor, wherein a first end of the first compressor is connected to the first side;

[0028] A first condenser, one end of which is connected to the first end of the first compressor, and the other end of which is connected to the third side;

[0029] A first gas-liquid separator, one end of which is connected to the second side, and the other end of which is connected to the second end of the first compressor.

[0030] In one alternative implementation, the heat pump base module is a heating and cooling heat pump module.

[0031] In one optional implementation, the heating and cooling heat pump module includes:

[0032] The four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port;

[0033] A second compressor, one end of which is connected to the first valve port;

[0034] A second condenser, one end of which is connected to both the second valve port and the first side;

[0035] The fourth valve, one end of which is connected to the other end of the second condenser, and the other end of which is connected to the third side;

[0036] A second expansion valve is connected to the other end of the second condenser, and the other end of the second expansion valve is connected to the third side.

[0037] The second gas-liquid separator has one end connected to the third valve port of the four-way valve, and the other end connected to the other end of the second compressor.

[0038] The heating and cooling heat pump module has a heating mode in which the first valve port and the second valve port are connected, the third valve port and the fourth valve port are connected, and the fourth valve is open.

[0039] The heat pump module also has a cooling mode in which the first valve port and the fourth valve port are connected, the second valve port and the third valve port are connected, and the second expansion valve is open.

[0040] In one alternative embodiment, the fourth valve is a first check valve, which is normally open in the direction of outflow from the other end of the second condenser. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the overall structure of the heat pump system in an embodiment of this utility model;

[0043] Figure 2 for Figure 1 A schematic diagram of the defrosting process of the first evaporator module in a medium-temperature heat pump system;

[0044] Figure 3 for Figure 1 A schematic diagram of the defrosting process of the second evaporation module in a medium-temperature heat pump system;

[0045] Figure 4 for Figure 1 A schematic diagram of the defrosting process of the last evaporator module in a medium-temperature heat pump system;

[0046] Figure 5 This is a schematic diagram of the structure of a single-heating heat pump module in an embodiment of this utility model;

[0047] Figure 6 This is a schematic diagram of the structure of the heating and cooling heat pump module in this embodiment of the present invention.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Heat pump basic module; 11. First side; 12. Second side; 13. Third side;

[0050] 14. Single-system heat pump module; 141. First compressor; 142. First condenser; 143. First gas-liquid separator;

[0051] 15. Heating and cooling heat pump module; 151. Second compressor; 152. Four-way valve; 1521. First valve port; 1522. Second valve port; 1523. Third valve port; 1524. Fourth valve port; 153. Second condenser; 154. Fourth valve; 155. Second expansion valve; 156. Second gas-liquid separator;

[0052] 2. Evaporation module; 21. First interface; 22. Second interface; 23. Third interface; 24. Fourth interface; 25. Evaporator; 26. Valve group; 261. Second valve; 262. Third valve; 27. First valve; 28. First expansion valve. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0054] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0056] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0057] When a heat pump is in heating mode, the outdoor heat exchanger absorbs heat from the outdoor environment. At this time, the refrigerant temperature inside the outdoor heat exchanger is much lower than the outdoor air temperature, especially in cold weather, potentially below 0°C. When water vapor in the outdoor air encounters the surface of the outdoor heat exchanger, it quickly condenses into frost. Since frost is a poor conductor of heat (its thermal conductivity is much lower than that of metal), it directly hinders heat exchange between the outdoor air and the refrigerant inside the outdoor heat exchanger. This prevents the evaporator 25 from effectively absorbing outdoor heat, significantly reducing the heat delivered by the heat pump to the indoor unit, slowing down indoor heating, or even stopping heating altogether, severely impacting the user experience. Although some products have a defrost mode that uses a four-way valve to switch between indoor and outdoor evaporators and condensers for cooling and heating, allowing defrosting when the outdoor heat exchanger is frosted, the heat pump needs to stop heating during the switching process, which also causes compressor exhaust losses.

[0058] In view of this, the present invention provides a heat pump system to solve the problem that when the heat pump system switches from heating mode to defrost mode, it needs to stop heating and also causes compressor exhaust loss.

[0059] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0060] According to an embodiment of the present invention, a heat pump system is provided, which includes a heat pump base module 1 and an evaporation module 2.

[0061] Specifically, in this embodiment, the heat pump base module 1 can be a common base module, such as consisting of a compressor, condenser, and gas-liquid separator. That is to say, in the heat pump system, other components besides the evaporation module 2 can be adapted by those skilled in the art according to the actual situation.

[0062] Furthermore, in this embodiment, the heat pump base module 1 is provided with a first side 11, a second side 12 and a third side 13. The first side 11 is suitable for discharging high-temperature and high-pressure refrigerant, the second side 12 is suitable for recovering low-temperature and low-pressure refrigerant, and the third side 13 can output refrigerant that is introduced into the evaporation module 2.

[0063] Furthermore, in this embodiment, as Figures 1 to 6 As shown, the system includes at least two evaporation modules 2 connected in parallel, for example, two, three, four, five, etc. Each evaporation module 2 is provided with a first interface 21, a second interface 22, a third interface 23, and a fourth interface 24. The first interface 21 is connected to the first side 11, the second interface 22 is connected to the second side 12, the third interface 23 is connected to the third side 13, and the fourth interface 24 is connected to the third side 13. It should be noted that the refrigerant is throttled and depressurized when flowing through the third interface 23, indicating that in the evaporation module 2, after the refrigerant is throttled and depressurized, it is input into the evaporator 25 for evaporation and heat absorption during the evaporation process.

[0064] Furthermore, in this embodiment, as Figures 2 to 4 As shown, the evaporation module 2 has a defrosting state connected to the first side 11 and the third side 13, and an evaporation state connected to the second side 12 and the third side 13. That is, in the defrosting state, the evaporation module 2 is connected along the refrigerant flow path, with the first side 11, the first interface 21, the evaporation module 2, the fourth interface 24, and the third side 13 connected; in the evaporation state, the evaporation module 2 is connected along the refrigerant flow path, with the third side 13, the third interface 23, the evaporation module 2, the second interface 22, and the second side 12 connected.

[0065] Of course, during the heating process of the heat pump system, all evaporation modules 2 are in an evaporation state. For example... Figures 2 to 4 As shown, when the heat pump system requires defrosting, the evaporator module 2 that needs defrosting can be switched to defrost mode according to the actual situation, while the evaporator module 2 that does not need defrosting remains in evaporation mode. Furthermore, during the defrosting process, it must be ensured that at least one evaporator module 2 is in evaporation mode, so that the heat pump can provide normal heating.

[0066] This configuration, with the evaporation modules 2 connected in parallel, allows for alternating defrosting. When one or more evaporation modules 2 are in defrosting mode, the other modules remain in evaporation mode. Independent switching between defrosting and evaporation modes avoids system-wide heating / cooling transitions, preventing a sudden drop in heating capacity during defrosting. This eliminates the need to shut down the compressor in the heat pump base module 1, thus solving the problem of compressor exhaust losses and energy losses during shutdown when switching from heating to defrosting mode.

[0067] Furthermore, in an alternative implementation, such as Figures 1 to 6 As shown, the evaporation module 2 includes an evaporator 25, a valve group 26, a first valve 27, and a first expansion valve 28.

[0068] Specifically, the evaporator 25 is provided with a first port and a second port, and the valve group 26 is provided with a connection port, a first interface 21 and a second interface 22, with the connection port connected to the first port. One end of the first valve 27 is connected to the second port, and the other end of the first valve 27 is set as a fourth interface 24. One end of the first expansion valve 28 is connected to the second port, and the other end of the first expansion valve 28 is set as a third interface 23.

[0069] Furthermore, in this embodiment, the evaporation module 2 has a defrosting state in which the connection port, the first interface 21, the evaporator 25, and the first valve 27 are connected, and an evaporation state in which the connection port, the second interface 22, the evaporator 25, and the first expansion valve 28 are connected.

[0070] With this configuration, in this embodiment, when in evaporation mode, the first expansion valve 28 throttles and reduces pressure, ensuring efficient evaporation and heat absorption of the refrigerant within the evaporator 25, meeting the core requirements of heat pump evaporation and improving heat exchange efficiency. In defrost mode, valve assembly 26 connects to the first side 11, allowing high-temperature refrigerant to enter the evaporator 25 for defrosting. The defrosting liquid flows through the first valve 27 and the fourth port 24 to the third side 13, thus circulating with other refrigerants to other evaporation modules 2, avoiding direct backflow to the compressor and solving the liquid slugging risk problem. Furthermore, the coordination between valve assembly 26 and the valves ensures precise and controllable mode switching, avoiding energy loss caused by state confusion.

[0071] Of course, the valve assembly 26 can be implemented by a single three-way valve. Similarly, the three-way valve is provided with a connection port, a first interface 21, and a second interface 22.

[0072] Of course, this valve assembly 26 can also be implemented by two two-way valves connected in parallel, such as... Figures 1 to 6 As shown, valve group 26 includes a second valve 261 and a third valve 262.

[0073] Specifically, in this embodiment, the valve group 26 is composed of two parallel second valves 261 and third valves 262. One end of the second valve 261 is connected to the first port, and the other end of the second valve 261 is connected to the first side 11. One end of the third valve 262 is connected to the first port, and the other end of the third valve 262 is connected to the second side 12.

[0074] In this configuration, the second valve 261 and the third valve 262 are independently controlled. During defrosting, only the second valve 261 opens, connecting the high-temperature gas on the first side 11. During evaporation, only the third valve 262 opens, connecting the low-pressure gas on the second side 12, thus strictly isolating the high and low pressure channels and preventing cross-flow. Furthermore, independent valves can improve switching accuracy, reduce pressure fluctuations, and reduce energy loss. They can also prevent the mixing of high-temperature and high-pressure gas into the low-pressure side, which would lead to a decrease in compression efficiency and improve system stability.

[0075] Furthermore, in an alternative implementation, such as Figures 1 to 6 As shown, the first valve 27 is the first check valve, and the first check valve is normally open in the direction of flow out of the second port.

[0076] With this configuration, in this embodiment, the first one-way valve only allows liquid to flow from the second port of the evaporator 25 to the third side 13, that is, to other evaporation modules 2, preventing reverse flow. This ensures that all the liquid generated during defrosting is guided to the evaporation modules 2 that are still in the evaporation state for evaporation, avoiding liquid accumulation or backflow. This improves the utilization efficiency of the defrosting liquid, ensures that the liquid flows smoothly to other evaporation modules 2 for evaporation, and enhances defrosting efficiency and system safety.

[0077] Furthermore, in an alternative implementation, such as Figure 5 As shown, the heat pump basic module 1 is a single-heating heat pump module 14. That is to say, the heat pump basic module 1 can only produce heat.

[0078] Furthermore, in an optional embodiment, the single-heating heat pump module 14 includes a first compressor 141, a first condenser 142, and a first gas-liquid separator 143.

[0079] Specifically, the first end of the first compressor 141 is connected to the first side 11, one end of the first condenser 142 is connected to the first end of the first compressor 141, the other end of the first condenser 142 is connected to the third side 13, one end of the first gas-liquid separator 143 is connected to the second side 12, and the other end of the first gas-liquid separator 143 is connected to the second end of the first compressor 141.

[0080] In this embodiment, the cooperation of the first compressor 141, the first condenser 142 and the first gas-liquid separator 143 enables the single heating heat pump module 14 to achieve the heating function.

[0081] Furthermore, in an optional embodiment, the heat pump base module 1 is a heating and cooling heat pump module 15. That is, the heating and cooling heat pump module 15 can switch between heating and cooling, and can perform both heating and cooling. When heating, the evaporation module 2 acts as an evaporator 25, and when cooling, the evaporation module 2 acts as a condenser.

[0082] Furthermore, in an optional embodiment, the heating and cooling heat pump module 15 includes a four-way valve 152, a second compressor 151, a second condenser 153, a fourth valve 154, a second expansion valve 155, and a second gas-liquid separator 156.

[0083] Specifically, the four-way valve 152 is provided with a first valve port 1521, a second valve port 1522, a third valve port 1523, and a fourth valve port 1524. One end of the second compressor 151 is connected to the first valve port 1521, one end of the second condenser 153 is connected to both the second valve port 1522 and the first side 11, one end of the fourth valve 154 is connected to the other end of the second condenser 153, and the other end of the fourth valve 154 is connected to the third side 13.

[0084] Furthermore, in this embodiment, the second expansion valve 155 is connected to the other end of the second condenser 153, and the other end of the second expansion valve 155 is connected to the third side 13. One end of the second gas-liquid separator 156 is connected to the third valve port 1523 of the four-way valve 152, and the other end of the second gas-liquid separator 156 is connected to the other end of the second compressor 151.

[0085] In actual operation, the heating and cooling heat pump module 15 has a heating mode in which the first valve port 1521 and the second valve port 1522 are connected, the third valve port 1523 and the fourth valve port 1524 are connected, and the fourth valve 154 is open.

[0086] During normal heating, the refrigerant sequentially passes through the second compressor 151, the first valve port 1521, the second valve port 1522, the second condenser 153, the fourth valve 154, the third side 13, the evaporator module 2, the second side 12, the fourth valve port 1524, the third valve port 1523, and the second gas-liquid separator 156, finally flowing back to the second compressor 151 to complete the heating cycle. When defrosting is required, the refrigerant flows out from the second valve port 1522 and directly to the first side 11. The evaporator module 2, which requires defrosting, switches to defrosting mode, and the refrigerant flows into the evaporator module 2 for defrosting.

[0087] In actual operation, the heat pump module 15 also has a cooling mode in which the first valve port 1521 and the fourth valve port 1524 are connected, the second valve port 1522 and the third valve port 1523 are connected, and the second expansion valve 155 is open.

[0088] At this time, during refrigeration, the refrigerant passes sequentially through the second compressor 151, the first valve port 1521, the fourth valve port 1524, the second side 12, the evaporator module 2, the third side 13, the second expansion valve 155, the second condenser 153, the second valve port 1522, the third valve port 1523, and the second gas-liquid separator 156, and finally flows back to the second compressor 151 to complete the refrigeration cycle.

[0089] Furthermore, in an optional embodiment, the fourth valve 154 is a second check valve, which is normally open in the direction of outflow from the other end of the second condenser 153.

[0090] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A heat pump system, characterized in that, include: The heat pump basic module (1) is provided with a first side (11), a second side (12) and a third side (13); At least two parallel evaporation modules (2) are provided, each evaporation module (2) is provided with a first interface (21), a second interface (22), a third interface (23) and a fourth interface (24); the first interface (21) is connected to the first side (11), the second interface (22) is connected to the second side (12), the third interface (23) is connected to the third side (13), and the fourth interface (24) is connected to the third side (13); the refrigerant is throttled and depressurized when flowing through the third interface (23); The evaporation module (2) has a defrosting state connected to the first side (11) and the third side (13), and an evaporation state connected to the second side (12) and the third side (13).

2. The heat pump system according to claim 1, characterized in that, The evaporation module (2) includes: Evaporator (25) is provided with a first port and a second port; The valve assembly (26) is provided with a connection port, a first interface (21) and a second interface (22), wherein the connection port is connected to the first port; The first valve (27) has one end connected to the second port and the other end of the first valve (27) is configured as the fourth interface (24). A first expansion valve (28) is connected at one end to the second port, and the other end of the first expansion valve (28) is configured as the third interface (23). The evaporation module (2) has a defrosting state in which the connection port, the first interface (21), the evaporator (25), and the first valve (27) are connected, and an evaporation state in which the connection port, the second interface (22), the evaporator (25), and the first expansion valve (28) are connected.

3. The heat pump system according to claim 2, characterized in that, The valve assembly (26) is a three-way valve, which is provided with the connection port, the first interface (21) and the second interface (22).

4. The heat pump system according to claim 2, characterized in that, The valve assembly (26) includes: The second valve (261) has one end connected to the first port and the other end connected to the first side (11). A third valve (262) is connected at one end to the first port and at the other end to the second side (12).

5. The heat pump system according to any one of claims 2 to 4, characterized in that, The first valve (27) is a first check valve, and the first check valve is normally open in the direction of outflow from the second port.

6. The heat pump system according to any one of claims 1 to 4, characterized in that, The heat pump basic module (1) is a single-heating heat pump module (14).

7. The heat pump system according to claim 6, characterized in that, The single-function heat pump module (14) includes: A first compressor (141) is connected at its first end to the first side (11); The first condenser (142) has one end connected to the first end of the first compressor (141) and the other end connected to the third side (13). A first gas-liquid separator (143) is connected at one end to the second side (12), and at the other end to the second end of the first compressor (141).

8. The heat pump system according to any one of claims 1 to 4, characterized in that, The heat pump basic module (1) is a heating and cooling heat pump module (15).

9. The heat pump system according to claim 8, characterized in that, The heating and cooling heat pump module (15) includes: The four-way valve (152) is provided with a first valve port (1521), a second valve port (1522), a third valve port (1523) and a fourth valve port (1524). A second compressor (151) is connected at one end to the first valve port (1521); The second condenser (153) has one end connected to both the second valve port (1522) and the first side (11). The fourth valve (154) is connected at one end to the other end of the second condenser (153) and at the other end to the third side (13). The second expansion valve (155) is connected to the other end of the second condenser (153), and the other end of the second expansion valve (155) is connected to the third side (13). The second gas-liquid separator (156) has one end connected to the third valve port (1523) of the four-way valve (152) and the other end connected to the other end of the second compressor (151). The heating and cooling heat pump module (15) has a heating mode in which the first valve port (1521) and the second valve port (1522) are connected, the third valve port (1523) and the fourth valve port (1524) are connected, and the fourth valve (154) is open. The heat pump module (15) also has a cooling mode in which the first valve port (1521) and the fourth valve port (1524) are connected, the second valve port (1522) and the third valve port (1523) are connected, and the second expansion valve (155) is open.

10. The heat pump system according to claim 9, characterized in that, The fourth valve (154) is a second check valve, and the direction in which the second check valve flows out along the other end of the second condenser (153) is normally open.

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