Heat pump system

Abstract

The embodiment of the utility model provides a heat pump system which comprises an indoor heat exchanger, a throttling flow path, an outdoor heat exchanger and a first gas-liquid separator, and the indoor heat exchanger, the throttling flow path and the outdoor heat exchanger communicate in sequence; the first gas-liquid separator is provided with a first liquid opening, a first gas outlet end and a second liquid opening, the first liquid opening is connected with the end, close to the throttling flow path, of the indoor heat exchanger, and the first gas outlet end is connected with the end, away from the throttling flow path, of the indoor heat exchanger; the second liquid opening is connected with the end, close to the indoor heat exchanger, of the throttling flow path.

Description

Technical Field

[0001] The present application relates to the field of heat pump technology, and in particular to a heat pump system. Background Art

[0002] In the related art, the heating performance of the heat pump system in a low temperature environment is poor and cannot meet the heating needs well. Utility Model Content

[0003] The embodiment of the present application provides a heat pump system, which can effectively improve the heating performance of the heat pump system in a low-temperature environment and better meet the heating needs.

[0004] An embodiment of the present application provides a heat pump system, including an indoor heat exchanger, a throttling flow path, an outdoor heat exchanger and a first gas-liquid separator, wherein the indoor heat exchanger, the throttling flow path and the outdoor heat exchanger are connected in sequence; the first gas-liquid separator has a first liquid port, a first air outlet and a second liquid port, the first liquid port is connected to an end of the indoor heat exchanger close to the throttling flow path, the first air outlet is connected to an end of the indoor heat exchanger away from the throttling flow path, and the second liquid port is connected to an end of the throttling flow path close to the indoor heat exchanger.

[0005] In some embodiments, the heat pump system also includes a second gas-liquid separator, the second gas-liquid separator having a third liquid port, a second gas outlet and a fourth liquid port, the third liquid port is connected to an end of the outdoor heat exchanger close to the throttling flow path, the second gas outlet is connected to an end of the outdoor heat exchanger away from the throttling flow path, and the fourth liquid port is connected to an end of the throttling flow path close to the outdoor heat exchanger.

[0006] In some embodiments, the heat pump system further includes a compressor and a reversing valve, the compressor having an exhaust port and an air return port, and the reversing valve is respectively connected to the exhaust port, the air return port, the indoor heat exchanger, and the outdoor heat exchanger.

[0007] In some embodiments, the heat pump system further includes a flash evaporator having a third gas outlet, a fifth liquid port, and a sixth liquid port; the compressor has an air supply port; the third gas outlet is connected to the air supply port; the fifth liquid port is connected to an end of the throttling flow path close to the outdoor heat exchanger; and the sixth liquid port is connected to the outdoor heat exchanger.

[0008] In some embodiments, a second one-way throttle valve and a third one-way throttle valve are provided on the throttling flow path, and the second liquid port, the second one-way throttle valve, the third one-way throttle valve and the fifth liquid port are connected in sequence; when the heat pump system is in heating mode, the second one-way throttle valve stops throttling, and the third one-way throttle valve throttles; when the heat pump system is in cooling mode, the second one-way throttle valve throttles, and the third one-way throttle valve stops throttling.

[0009] In some embodiments, the heat pump system further includes a first stop valve, which connects the third air outlet and the air supply port; when the heat pump system is in heating mode, the first stop valve is turned on; when the heat pump system is in cooling mode, the first stop valve is turned off.

[0010] In some embodiments, the heat pump system further includes a first one-way throttle valve, which connects the sixth liquid port and the outdoor heat exchanger close to one end of the throttling flow path; when the heat pump system is in heating mode, the first one-way throttle valve throttles; when the heat pump system is in cooling mode, the first one-way throttle valve stops throttling.

[0011] In some embodiments, the heat pump system includes a first non-return flow path and a second non-return flow path, the first non-return flow path and the second non-return flow path are arranged in parallel between the indoor heat exchanger and the first liquid port, the first non-return flow path is provided with a first control valve and a first electrically controlled radiator connected in series in sequence, and the second non-return flow path is provided with a second control valve; when the heat pump system is in cooling mode, the first control valve is cut off and the second control valve is turned on; when the heat pump system is in heating mode, the first control valve is turned on and the second control valve is cut off.

[0012] In some embodiments, the first liquid port includes a first sub-port and a second sub-port, the first sub-port is connected to an end of the first non-return flow path away from the indoor heat exchanger, and the second sub-port is connected to an end of the second non-return flow path away from the indoor heat exchanger.

[0013] In some embodiments, the heat pump system includes a second electrically controlled radiator, a second one-way throttle valve and a third one-way throttle valve are provided on the throttling flow path, and the second liquid port, the second one-way throttle valve, the second electrically controlled radiator and the third one-way throttle valve are connected in sequence; when the heat pump system is in heating mode, the second one-way throttle valve stops throttling and the third one-way throttle valve performs throttling; when the heat pump system is in cooling mode, the second one-way throttle valve performs throttling and the third one-way throttle valve stops throttling.

[0014] In the embodiment of the present application, a first gas-liquid separator corresponding to the indoor heat exchanger is set. When the heat pump system is in heating mode, the gaseous refrigerant flows into the indoor heat exchanger from the end of the indoor heat exchanger away from the throttling flow path, absorbs heat and heats up at the indoor heat exchanger to form a gas-liquid mixed refrigerant. The gas-liquid mixed refrigerant then enters the first gas-liquid separator for gas-liquid separation, and the separated liquid refrigerant continues to flow to the throttling flow path for throttling; and the separated gaseous refrigerant is replenished into the indoor heat exchanger from the end of the indoor heat exchanger away from the throttling flow path to balance the inlet and outlet pressures of the indoor heat exchanger and reduce the pressure loss of the indoor heat exchanger. On the one hand, it improves the heat release and heating effect of the indoor heat exchanger on the indoor side, and on the other hand, it can increase the amount of refrigerant flowing through the outdoor heat exchanger, thereby increasing the pressure of the outdoor heat exchanger, reducing the risk of frost in the outdoor heat exchanger caused by factors such as low pressure and uneven temperature, thereby improving the heating performance of the heat pump system in a low temperature environment and better meeting the heating needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a connection structure diagram of a heat pump system in heating mode provided by some embodiments of the present application;

[0017] Figure 2 This is a connection structure diagram of the heat pump system provided in some embodiments of the present application in cooling mode.

[0018] Description of main component symbols:

[0019] 1-indoor heat exchanger, 2-throttling flow path, 21-second one-way throttle valve, 22-third one-way throttle valve, 3-outdoor heat exchanger, 4-compressor, 5-reversing valve, 61-first gas-liquid separator, 62-second gas-liquid separator, 71-first non-return flow path, 711-first control valve, 712-first electronically controlled radiator, 72-second non-return flow path, 721-second control valve, 73-second electronically controlled radiator, 8-flash evaporator, 91-first stop valve, 92-first one-way throttle valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0022] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0023] The use of "suitable for" or "configured to" in this application is intended to be open and inclusive language, and does not exclude devices that are adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0024] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0025] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides a heat pump system, which can effectively reduce the risk of frost formation on the outdoor heat exchanger 3, improve the heating performance of the heat pump system in a low-temperature environment, and better meet the heating needs.

[0026] The heat pump system includes an indoor heat exchanger 1, a throttling flow path 2, an outdoor heat exchanger 3 and a first gas-liquid separator 61. The indoor heat exchanger 1, the throttling flow path 2 and the outdoor heat exchanger 3 are connected in sequence; the indoor heat exchanger 1 is used for throttling the refrigerant between the indoor heat exchanger 1 and the outdoor heat exchanger 3, and the outdoor heat exchanger 3 is used for exchanging heat with indoor air and / or indoor water to meet the needs of indoor heating and / or domestic hot water supply.

[0027] The first gas-liquid separator 61 has a first liquid port, a first gas outlet and a second liquid port that are connected to each other. One of the first liquid port and the second liquid port is used to input liquid refrigerant mixed with gaseous refrigerant into the first gas-liquid separator 61, and the other is used to discharge the liquid refrigerant to the outside of the first gas-liquid separator 61. The first gas outlet is used to discharge the gaseous refrigerant separated in the first gas-liquid separator 61 to the outside of the first gas-liquid separator 61.

[0028] Here, the first liquid port is connected to the end of the indoor heat exchanger 1 close to the throttling flow path 2, the first air outlet is connected to the end of the indoor heat exchanger 1 away from the throttling flow path 2, and the second liquid port is connected to the end of the throttling flow path 2 close to the indoor heat exchanger 1. When the heat pump system is in heating mode, the gaseous refrigerant flows into the indoor heat exchanger 1 from the end of the indoor heat exchanger 1 away from the throttling flow path 2, and absorbs heat and heats up at the indoor heat exchanger 1 to form a gas-liquid mixed refrigerant. The gas-liquid mixed refrigerant then enters the first gas-liquid separator 61 for gas-liquid separation, and the separated liquid refrigerant continues to flow to the throttling flow path 2 for throttling; and the separated gaseous refrigerant is replenished into the indoor heat exchanger 1 from the end of the indoor heat exchanger 1 away from the throttling flow path 2 to balance the inlet and outlet pressures of the indoor heat exchanger 1 and reduce the pressure loss of the indoor heat exchanger 1. On the one hand, it improves the heat release and heating effect of the indoor heat exchanger 1 on the indoor side, and on the other hand, it can increase the amount of refrigerant flowing through the outdoor heat exchanger 3, thereby increasing the pressure of the outdoor heat exchanger 3, and reducing the risk of frost in the outdoor heat exchanger 3 caused by factors such as low pressure and uneven temperature, thereby improving the heating performance of the heat pump system in a low temperature environment and better meeting the heating needs.

[0029] In some embodiments, the heat pump system may further include a second gas-liquid separator 62. The second gas-liquid separator 62 has a third liquid port, a second gas outlet, and a fourth liquid port. One of the third liquid port and the fourth liquid port is used to input liquid refrigerant mixed with gaseous refrigerant into the second gas-liquid separator 62, and the other is used to discharge the liquid refrigerant out of the second gas-liquid separator 62. The second gas outlet is used to discharge the gaseous refrigerant separated in the second gas-liquid separator 62 out of the second gas-liquid separator 62.

[0030] Here, the third liquid port is connected to the end of the outdoor heat exchanger 3 close to the throttling flow path 2, the second gas outlet is connected to the end of the outdoor heat exchanger 3 away from the throttling flow path 2, and the fourth liquid port is connected to the end of the throttling flow path 2 close to the outdoor heat exchanger 3. When the heat pump system is in cooling mode, the gaseous refrigerant flows into the outdoor heat exchanger 3 from the end of the outdoor heat exchanger 3 away from the throttling flow path 2, and absorbs heat and heats up at the outdoor heat exchanger 3 to form a gas-liquid mixed refrigerant, which then enters the second gas-liquid separator 62 for gas-liquid separation. The separated liquid refrigerant continues to flow to the throttling flow path 2 for throttling; and the separated gaseous refrigerant is replenished into the outdoor heat exchanger 3 from the end of the outdoor heat exchanger 3 away from the throttling flow path 2 to balance the inlet and outlet pressures of the outdoor heat exchanger 3 and reduce the pressure loss of the outdoor heat exchanger 3, thereby improving the heat release effect of the outdoor heat exchanger 3 on the outdoor side and the subcooling degree of the refrigerant, thereby improving the cooling performance of the heat pump system and better meeting the cooling and temperature reduction needs.

[0031] In some embodiments, the heat pump system may further include a compressor 4 and a reversing valve 5. The compressor 4 may have an exhaust port and a return port, and the reversing valve 5 is respectively connected to the exhaust port, the return port, the indoor heat exchanger 1, and the outdoor heat exchanger 3. Here, the reversing valve 5 is provided with at least four ports, wherein the four ports are respectively connected to the exhaust port, the return port, the end of the indoor heat exchanger 1 away from the throttling flow path 2, and the end of the outdoor heat exchanger 3 away from the throttling flow path 2 in a one-to-one correspondence. Correspondingly, the first air outlet is also connected to the port on the reversing valve 5 connected to the outdoor heat exchanger 3. When the heat pump system is provided with the above-mentioned second gas-liquid separator 62, the second air outlet is also connected to the port on the reversing valve 5 connected to the indoor heat exchanger 1.

[0032] In some embodiments, the heat pump system may further include a flash evaporator 8 having a third gas outlet, a fifth liquid port, and a sixth liquid port. The compressor 4 has an air supply port, the third gas outlet is connected to the air supply port, the fifth liquid port is connected to the end of the throttling flow path 2 close to the outdoor heat exchanger 3, and the sixth liquid port is connected to the outdoor heat exchanger 3. When the heat pump system is in heating mode, the refrigerant throttled by the throttling flow path 2 can enter the flash evaporator 8 for flash evaporation, and the gaseous refrigerant formed by the flash evaporator 8 can return to the compressor 4 through the third gas outlet and the air supply port to replenish the compressor 4 and increase the enthalpy; and the liquid refrigerant in the flash evaporator 8 can further flow through the outdoor heat exchanger 3 to absorb heat and vaporize, and then return to the compressor 4 to complete the heating cycle.

[0033] The structure of the throttling flow path 2 can be determined according to actual needs and is not limited in the embodiments of the present application. In some embodiments, a second one-way throttle valve 21 and a third one-way throttle valve 22 can be provided on the throttling flow path 2. In some examples, the heat pump system can further include the above-mentioned flash evaporator 8, with the second liquid port, the second one-way throttle valve 21, the third one-way throttle valve 22 and the fifth liquid port connected in sequence. When the heat pump system is in heating mode, the second one-way throttle valve 21 throttles and the third one-way throttle valve 22 stops throttling. At this time, the third one-way throttle valve 22 remains open but does not throttle; when the heat pump system is in cooling mode, the second one-way throttle valve 21 stops throttling. At this time, the second one-way throttle valve 21 remains open but does not throttle, and the third one-way throttle valve 22 throttles. In this way, throttling can be performed by different throttle valves in heating mode and cooling mode, respectively, thereby improving the control accuracy for different modes. In addition, by arranging the second one-way throttle valve 21 and the third one-way throttle valve 22 between the indoor heat exchanger 1 and the flash evaporator 8, when the heat pump system is in the cooling mode, the refrigerant discharged from the outdoor heat exchanger 3 enters the flash evaporator 8 without throttling, so that the refrigerant entering the flash evaporator 8 contains no or only a small amount of gaseous components, stopping or at least greatly weakening the flash evaporator 8's function of replenishing air and increasing enthalpy, ensuring that the refrigerant flow and pressure flowing through the indoor heat exchanger 1 are sufficient, thereby ensuring the cooling effect of the indoor heat exchanger 1.

[0034] In some examples, the heat pump system may further include a first stop valve 91, which connects the third air outlet and the air supply port. When the heat pump system is in heating mode, the first stop valve 91 is open; when the heat pump system is in cooling mode, the first stop valve 91 is closed. In this way, the air supply and enthalpy increase function of the flash evaporator 8 can be selectively turned on and off by switching the first stop valve 91 on and off, thereby meeting the different requirements in the heating and cooling modes. For example, when the heat pump system is in heating mode, the first stop valve 91 can be controlled to be open to turn on the air supply and enthalpy increase function of the flash evaporator 8 to ensure the operating performance of the compressor 4; for another example, when the heat pump system is in cooling mode, the first stop valve 91 can be controlled to be closed to turn off the air supply and enthalpy increase function of the flash evaporator 8 to ensure sufficient refrigerant flow and pressure flowing through the indoor heat exchanger 1, thereby ensuring the cooling effect of the indoor heat exchanger 1.

[0035] In some examples, the heat pump system may further include a first one-way throttle valve 92, which connects the sixth liquid port and the end of the outdoor heat exchanger 3 near the throttling path 2. When the heat pump system is in heating mode, the first one-way throttle valve 92 throttles the liquid refrigerant flowing out of the sixth liquid port of the flash evaporator 8, thereby improving the heat absorption effect of the refrigerant at the outdoor heat exchanger 3 and thereby improving the heating effect of the heat pump system. When the heat pump system is in cooling mode, the first one-way throttle valve 92 stops throttling. At this time, the first one-way throttle valve 92 remains open but does not throttle, so that the refrigerant discharged from the outdoor heat exchanger 3 enters the flash evaporator 8 without throttling, so that the refrigerant entering the flash evaporator 8 contains no or only a small amount of gaseous components, and stops or at least greatly weakens the flash evaporator 8's function of replenishing air and increasing enthalpy, ensuring that the refrigerant flow and pressure flowing through the indoor heat exchanger 1 are sufficient, thereby ensuring the cooling effect of the indoor heat exchanger 1.

[0036] In some embodiments, the heat pump system may include a first check flow path 71 and a second check flow path 72. The first check flow path 71 and the second check flow path 72 are arranged in parallel between the indoor heat exchanger 1 and the first liquid port. The first check flow path 71 is provided with a first control valve 711 and a first electrically controlled radiator 712 connected in series. The first electrically controlled radiator 712 can be used to dissipate heat and cool an electronic control system such as an electronic control box or an electrical box. The second check flow path 72 is provided with a second control valve 721. When the heat pump system is in cooling mode, the first control valve 711 is closed and the second control valve 721 is opened. In this way, all the low-temperature refrigerant in the throttling flow path 2 flows to the indoor heat exchanger 1 through the second check flow path 72 and does not flow through the first check flow path 71, thereby preventing the low-temperature refrigerant from flowing through the first electrically controlled radiator 712 and causing condensation and moisture damage to the electronic control system. When the heat pump system is in heating mode, the first control valve 711 is turned on and the second control valve 721 is turned off; in this way, the medium-temperature refrigerant in the throttling flow path 2 that is slightly higher than the room temperature all flows through the first non-return flow path 71 to the indoor heat exchanger 1 and will not flow through the second non-return flow path 72. The medium-temperature refrigerant can be used to dissipate heat and cool the electronic control system when flowing through the first electronically controlled radiator 712, and will not cause condensation and moisture damage to the electronic control system.

[0037] In some examples, the first liquid port may include a first sub-port and a second sub-port. The first sub-port is connected to the end of the first non-return flow path 71 away from the indoor heat exchanger 1, and the second sub-port is connected to the end of the second non-return flow path 72 away from the indoor heat exchanger 1. By providing the first sub-port and the second sub-port, the first gas-liquid separator 61 can be connected to the first non-return flow path 71 and the second non-return flow path 72 respectively, avoiding flow path turbulence, improving pipeline connection organization, and improving maintainability.

[0038] In some embodiments, the heat pump system may include a second electronically controlled radiator 73, which can be used to dissipate heat and cool electronic control systems such as electronic control boxes and electrical boxes; the above-mentioned second one-way throttle valve 21 and third one-way throttle valve 22 can be provided on the throttling flow path 2, and the second liquid port, the second one-way throttle valve 21, the second electronically controlled radiator 73 and the third one-way throttle valve 22 are connected in sequence.

[0039] When the heat pump system is in heating mode, the second one-way throttle valve 21 stops throttling, while the third one-way throttle valve 22 starts throttling. At this time, the second one-way throttle valve 21 remains open but does not throttle. In this way, the second one-way throttle valve 21 does not throttle the refrigerant flowing out of the second liquid port, allowing the refrigerant to flow into the second electronically controlled radiator 73 without throttling. This prevents the refrigerant flowing through the second electronically controlled radiator 73 from being too cold, thus preventing the low-temperature refrigerant from flowing through the second electronically controlled radiator 73 and causing condensation and moisture damage to the electronic control system. The third one-way throttle valve 22 can throttle the refrigerant flowing out of the second electronically controlled radiator 73 to ensure the heat exchange requirements of the outdoor heat exchanger 3.

[0040] When the heat pump system is in cooling mode, the second one-way throttle valve 21 throttles, while the third one-way throttle valve 22 stops throttling. At this time, the third one-way throttle valve 22 remains open but does not throttle. Thus, the third one-way throttle valve 22 does not throttle the refrigerant flowing out of the outdoor heat exchanger 3. The refrigerant flows into the second electronically controlled radiator 73 without throttling, preventing the refrigerant flowing through the second electronically controlled radiator 73 from being too cold. This prevents the low-temperature refrigerant from flowing through the second electronically controlled radiator 73 and causing condensation and moisture damage to the electronic control system. The second one-way throttle valve 21 can throttle the refrigerant flowing out of the second electronically controlled radiator 73 to ensure the required heating effect of the indoor heat exchanger 1.

[0041] The heat pump system provided in the embodiments of the present application is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A heat pump system, characterized in that: It includes an indoor heat exchanger, a throttling flow path, an outdoor heat exchanger and a first gas-liquid separator, and the indoor heat exchanger, the throttling flow path and the outdoor heat exchanger are connected in sequence; the first gas-liquid separator has a first liquid port, a first air outlet and a second liquid port, the first liquid port is connected to an end of the indoor heat exchanger close to the throttling flow path, the first air outlet is connected to an end of the indoor heat exchanger away from the throttling flow path, and the second liquid port is connected to an end of the throttling flow path close to the indoor heat exchanger.

2. The heat pump system according to claim 1, characterized in that The heat pump system also includes a second gas-liquid separator, which has a third liquid port, a second gas outlet and a fourth liquid port. The third liquid port is connected to an end of the outdoor heat exchanger close to the throttling flow path, the second gas outlet is connected to an end of the outdoor heat exchanger away from the throttling flow path, and the fourth liquid port is connected to an end of the throttling flow path close to the outdoor heat exchanger.

3. The heat pump system according to claim 1, characterized in that The heat pump system further includes a compressor and a reversing valve. The compressor has an exhaust port and an air return port. The reversing valve is respectively connected to the exhaust port, the air return port, the indoor heat exchanger, and the outdoor heat exchanger.

4. The heat pump system according to claim 3, characterized in that The heat pump system also includes a flash evaporator, which has a third gas outlet, a fifth liquid port and a sixth liquid port. The compressor has an air supply port. The third gas outlet is connected to the air supply port, the fifth liquid port is connected to an end of the throttling flow path close to the outdoor heat exchanger, and the sixth liquid port is connected to the outdoor heat exchanger.

5. The heat pump system according to claim 4, characterized in that A second one-way throttle valve and a third one-way throttle valve are provided on the throttling flow path, and the second liquid port, the second one-way throttle valve, the third one-way throttle valve and the fifth liquid port are connected in sequence; when the heat pump system is in heating mode, the second one-way throttle valve stops throttling and the third one-way throttle valve performs throttling; when the heat pump system is in cooling mode, the second one-way throttle valve performs throttling and the third one-way throttle valve stops throttling.

6. The heat pump system according to claim 4, characterized in that The heat pump system further includes a first stop valve, which connects the third air outlet and the air supply port; when the heat pump system is in heating mode, the first stop valve is turned on; when the heat pump system is in cooling mode, the first stop valve is turned off.

7. The heat pump system according to claim 4, characterized in that The heat pump system also includes a first one-way throttle valve, which connects the sixth liquid port and the outdoor heat exchanger close to one end of the throttling flow path; when the heat pump system is in heating mode, the first one-way throttle valve throttles; when the heat pump system is in cooling mode, the first one-way throttle valve stops throttling.

8. The heat pump system according to claim 1, wherein: The heat pump system includes a first non-return flow path and a second non-return flow path, the first non-return flow path and the second non-return flow path are arranged in parallel between the indoor heat exchanger and the first liquid port, the first non-return flow path is provided with a first control valve and a first electrically controlled radiator connected in series in sequence, and the second non-return flow path is provided with a second control valve; when the heat pump system is in cooling mode, the first control valve is cut off and the second control valve is turned on; when the heat pump system is in heating mode, the first control valve is turned on and the second control valve is cut off.

9. The heat pump system according to claim 8, characterized in that The first liquid port includes a first sub-port and a second sub-port. The first sub-port is connected to an end of the first non-return flow path away from the indoor heat exchanger. The second sub-port is connected to an end of the second non-return flow path away from the indoor heat exchanger.

10. The heat pump system according to claim 1, characterized in that The heat pump system includes a second electrically controlled radiator, a second one-way throttle valve and a third one-way throttle valve are provided on the throttling flow path, and the second liquid port, the second one-way throttle valve, the second electrically controlled radiator and the third one-way throttle valve are connected in sequence; when the heat pump system is in heating mode, the second one-way throttle valve stops throttling and the third one-way throttle valve performs throttling; when the heat pump system is in cooling mode, the second one-way throttle valve performs throttling and the third one-way throttle valve stops throttling.

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