Control methods for heat pump systems, heat pump systems and storage media

Abstract

This invention discloses a control method for a heat pump system, a heat pump system, and a storage medium. The refrigerant main circuit includes an indoor heat exchanger, a first control valve, a heat dissipation module, a second control valve, and an outdoor heat exchanger connected in series. The heat dissipation module dissipates heat from heat-generating components. The refrigerant branch circuit includes a third control valve and an energy storage device. The method includes: acquiring a first temperature of the heat dissipation module and a second temperature of the environment in which the heat dissipation module is located; controlling at least one of the first, second, and third control valves to operate based on the first and second temperatures to reduce the condensation risk of the heat dissipation module; and / or controlling the outdoor fan corresponding to the outdoor heat exchanger to operate based on the first and second temperatures to reduce the condensation risk of the heat dissipation module. This invention aims to reduce the condensation risk of the heat dissipation module and improve the reliability of the heat pump system.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, and more particularly to a control method for a heat pump system, a heat pump system, and a storage medium. Background Technology

[0002] Some heat pump systems have a heat dissipation module installed in their refrigerant flow path to dissipate heat from heat-generating components such as the electronic control board through the medium and low temperature refrigerant flowing through it.

[0003] However, when the temperature of the refrigerant flowing through the heat dissipation module is too low, condensation will form on the surface of the heat dissipation module, causing damage to the heat-generating components and reducing the reliability of the heat pump system. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for a heat pump system, a heat pump system, and a storage medium, aiming to reduce the risk of condensation on the heat dissipation module and improve the reliability of the heat pump system operation.

[0005] To achieve the above objectives, the present invention provides a control method for a heat pump system. The heat pump system includes a refrigerant main circuit and refrigerant branch circuits connected to the refrigerant main circuit. The refrigerant main circuit includes an indoor heat exchanger, a first control valve, a heat dissipation module, a second control valve, and an outdoor heat exchanger connected to it. The heat dissipation module is used to dissipate heat from heat-generating components. The refrigerant branch circuit includes a third control valve and an energy storage device. The control method for the heat pump system includes the following steps:

[0006] Obtain the first temperature of the heat dissipation module and the second temperature of the environment in which the heat dissipation module is located;

[0007] Based on the first temperature and the second temperature, at least one of the first control valve, the second control valve, and the third control valve is operated to reduce the condensation risk of the heat dissipation module, and / or, based on the first temperature and the second temperature, the outdoor fan corresponding to the outdoor heat exchanger is operated to reduce the condensation risk of the heat dissipation module.

[0008] Optionally, the first control valve and the second control valve that are not located in the refrigerant inflow direction of the heat dissipation module are defined as the first target control valve, and the first control valve and the second control valve that are located in the refrigerant inflow direction of the heat dissipation module are defined as the second target control valve. The main refrigerant line further includes compressors connected to the indoor heat exchanger and the outdoor heat exchanger respectively. The first end of the refrigerant branch is connected to the exhaust port of the compressor, or the first end of the refrigerant branch is connected to the exhaust port or return port of the compressor through a reversing assembly. The pipeline between the heat dissipation module and the first control valve is connected to the second end of the refrigerant branch. The step of controlling at least one of the first control valve, the second control valve, and the third control valve to operate according to the first temperature and the second temperature to reduce the condensation risk of the heat dissipation module includes:

[0009] When the first temperature is less than or equal to the second temperature, the first target control valve is controlled to reduce its opening, and / or the second target control valve is controlled to operate at an opening greater than the preset opening, and / or the third control valve is controlled to operate at an opening greater than the preset opening.

[0010] When the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first target control valve is controlled to operate at a degree less than or equal to the current opening, and / or the second target control valve is controlled to operate at a degree greater than or equal to the current opening, and / or the third control valve is controlled to operate at a degree greater than or equal to the current opening.

[0011] The third temperature is obtained by increasing the second temperature by a preset adjustment value.

[0012] Optionally, the steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include:

[0013] During the first mode of operation of the heat pump system, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to reduce its opening, and the second control valve is controlled to operate at an opening greater than the preset opening.

[0014] The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include:

[0015] During the operation of the heat pump system in the first mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at a degree less than or equal to the current opening, and the second control valve is controlled to operate at a degree greater than or equal to the current opening.

[0016] In the first mode of operation: the outdoor heat exchanger is connected to the exhaust port of the compressor, the indoor heat exchanger is connected to the return port of the compressor, the first control valve operates at a throttling rate, the second control valve is open, and the third control valve operates at an opening less than or equal to the minimum opening degree.

[0017] Optionally, the steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include:

[0018] During the second operation mode of the heat pump system, when the first temperature is less than or equal to the second temperature, the second control valve is controlled to reduce its opening, and the first control valve is controlled to operate at an opening greater than the preset opening.

[0019] The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include:

[0020] During the operation of the heat pump system in the second mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the second control valve is controlled to operate at a degree less than or equal to the current opening, and the first control valve is controlled to operate at a degree greater than or equal to the current opening.

[0021] In the second mode of operation: the indoor heat exchanger is connected to the exhaust port of the compressor, the outdoor heat exchanger is connected to the return port of the compressor, the first control valve is open, the second control valve operates at a throttling rate, and the third control valve operates at an opening less than or equal to the minimum opening degree.

[0022] Optionally, the steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include:

[0023] During the operation of the heat pump system in the third mode, when the first temperature is less than or equal to the second temperature, the second control valve is controlled to reduce its opening, and the third control valve is controlled to operate at an opening greater than the preset opening.

[0024] The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include:

[0025] During the operation of the heat pump system in the third mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the second control valve is controlled to operate at an opening greater than or equal to the current opening, and the third control valve is controlled to operate at an opening greater than or equal to the current opening.

[0026] During the third mode of operation: the indoor heat exchanger is connected to the return port of the compressor, the outdoor heat exchanger is connected to the return port of the compressor, the third control valve operates at an opening greater than the minimum opening, the second control valve operates at a throttling rate, and the first control valve is closed.

[0027] Optionally, the steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include:

[0028] During the operation of the heat pump system in the fourth mode, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to reduce its opening, the second control valve is controlled to operate at an opening greater than the preset opening, and the third control valve is controlled to operate at an opening greater than the preset opening.

[0029] The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include:

[0030] During the operation of the heat pump system in the fourth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at a degree less than or equal to the current opening, the second control valve is controlled to operate at a degree greater than or equal to the current opening, and the third control valve is controlled to operate at a degree greater than or equal to the current opening.

[0031] During the operation of the fourth mode: the outdoor heat exchanger is connected to the exhaust port of the compressor, the indoor heat exchanger is connected to the return port of the compressor, the first control valve operates at a throttling rate, the second control valve is open, and the third control valve is opened at an opening greater than the minimum opening degree.

[0032] Optionally, the steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include:

[0033] During the fifth operating mode of the heat pump system, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to reduce its opening, the second control valve is controlled to reduce its opening, and the third control valve is controlled to operate at an opening greater than the preset opening.

[0034] The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include:

[0035] During the operation of the heat pump system in the fifth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at a degree less than or equal to the current opening, the second control valve is controlled to operate at a degree less than or equal to the current opening, and the third control valve is controlled to operate at a degree greater than or equal to the current opening.

[0036] During the operation of the fifth mode: both the outdoor heat exchanger and the indoor heat exchanger are connected to the return port of the compressor; both the first control valve and the second control valve operate at a throttling rate; and the third control valve is opened at an opening greater than the minimum opening degree.

[0037] Optionally, the steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include:

[0038] During the operation of the heat pump system in the sixth mode, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to operate at an opening greater than the preset opening, the second control valve is controlled to operate at a reduced opening, and the third control valve is controlled to operate at an opening greater than the preset opening.

[0039] The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include:

[0040] During the operation of the heat pump system in the sixth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at an opening greater than or equal to the current opening, the second control valve is controlled to operate at an opening less than or equal to the current opening, and the third control valve is controlled to operate at an opening greater than or equal to the current opening.

[0041] In the sixth mode of operation: the outdoor heat exchanger is connected to the return port of the compressor, the indoor heat exchanger is connected to the exhaust port of the compressor, the first control valve is open, the second control valve operates at a throttling rate, and the third control valve is opened at an opening greater than the minimum opening degree.

[0042] Optionally, the step of controlling the operation of the outdoor heat exchanger based on the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes:

[0043] When the outdoor heat exchanger is in a condensing state, and when the first temperature is less than or equal to the second temperature, the outdoor fan is controlled to reduce its speed.

[0044] When the outdoor heat exchanger is in a condensing state, and when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan is controlled to operate at a speed less than or equal to the current speed.

[0045] The third temperature is obtained by increasing the second temperature by a preset adjustment value.

[0046] Optionally, the step of controlling the operation of the outdoor heat exchanger based on the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes:

[0047] When the outdoor heat exchanger is in an evaporation state, and when the first temperature is less than or equal to the second temperature, the outdoor fan is controlled to increase its speed.

[0048] When the outdoor heat exchanger is in an evaporation state, and when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan is controlled to operate at a speed greater than or equal to the current speed.

[0049] The third temperature is obtained by increasing the second temperature by a preset adjustment value.

[0050] In addition, to achieve the above objectives, this application also proposes a heat pump system, which includes a control device, a refrigerant main circuit, and refrigerant branch circuits connected to the refrigerant main circuit. The refrigerant main circuit includes an indoor heat exchanger, a first control valve, a heat dissipation module, a second control valve, and an outdoor heat exchanger connected to it. The heat dissipation module is used to dissipate heat from the heat-generating components. The refrigerant branch circuit includes a third control valve and an energy storage device. The outdoor heat exchanger is equipped with a corresponding outdoor fan.

[0051] The first control valve, the second control valve, the third control valve, and the outdoor fan are all connected to the control device. The control device includes: a memory, a processor, and a control program for the heat pump system stored in the memory and executable on the processor. When the control program for the heat pump system is executed by the processor, it implements the steps of the control method for the heat pump system as described above.

[0052] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for a heat pump system, which, when executed by a processor, implements the steps of the control method for the heat pump system as described in any of the preceding claims.

[0053] This invention proposes a control method for a heat pump system. The heat pump system includes a refrigerant main circuit and refrigerant branch circuits connected to the refrigerant main circuit. The refrigerant main circuit includes a compressor and a connected indoor heat exchanger, a first control valve, a heat dissipation module for heat dissipation of heat-generating components, a second control valve, and an outdoor heat exchanger. The refrigerant branch circuit includes a third control valve and an energy storage device. Based on this heat pump system, a first temperature of the heat dissipation module and a second temperature of the environment where the heat dissipation module is located can accurately reflect the condensation risk of the heat dissipation module. The operation of at least one of the first, second, and third control valves and / or the operation of the outdoor fan can be regulated according to the first and second temperatures, thereby reducing the condensation risk of the heat dissipation module, avoiding damage to heat-generating components, and effectively improving the reliability of the heat pump system. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the refrigerant piping in one embodiment of the heat pump system of the present invention and a schematic diagram of the refrigerant flow direction in the first mode;

[0055] Figure 2 This is a schematic diagram of the refrigerant piping in one embodiment of the heat pump system of the present invention and a schematic diagram of the refrigerant flow direction in a second mode;

[0056] Figure 3 This is a schematic diagram of the refrigerant piping in one embodiment of the heat pump system of the present invention and a schematic diagram of the refrigerant flow direction in the third mode;

[0057] Figure 4 This is a schematic diagram of the refrigerant piping in one embodiment of the heat pump system of the present invention and a schematic diagram of the refrigerant flow direction in the fourth mode;

[0058] Figure 5 This is a schematic diagram of the refrigerant piping in one embodiment of the heat pump system of the present invention and a schematic diagram of the refrigerant flow direction in the fifth mode;

[0059] Figure 6 This is a schematic diagram of the refrigerant piping in one embodiment of the heat pump system of the present invention and a schematic diagram of the refrigerant flow direction in the sixth mode;

[0060] Figure 7 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the heat pump system of the present invention;

[0061] Figure 8 This is a flowchart illustrating an embodiment of the control method for the heat pump system of the present invention;

[0062] Figure 9 This is a schematic flowchart of another embodiment of the control method for the heat pump system of the present invention.

[0063] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0064] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0065] This invention provides a heat pump system.

[0066] In this embodiment of the invention, reference is made to Figures 1 to 7 The heat pump system includes a control device 100, a refrigerant main circuit, and refrigerant branch circuits connected to the refrigerant main circuit.

[0067] The refrigerant main circuit includes an indoor unit, an outdoor heat exchanger 4, a heat dissipation module 5, a second control valve 8, and a compressor 1. The indoor unit includes an indoor heat exchanger 9 and a first control valve 7. The indoor heat exchanger 9, the first control valve 7, the heat dissipation module 5, the second control valve 8, and the outdoor heat exchanger 4 are connected together. The indoor heat exchanger 9 and the outdoor heat exchanger 4 are respectively connected to the compressor 1. The refrigerant branch circuit includes an energy storage device 10 and a third control valve 6. The heat dissipation module 5 is used to dissipate heat from heat-generating components (such as the main control board).

[0068] The first control valve 7, the second control valve 8, and the third control valve 6 are all connected to the control device 100. In this embodiment, the first control valve 7, the second control valve 8, and the third control valve 6 are all electronic expansion valves. In other embodiments, the first control valve 7 and / or the second control valve 8 and / or the third control valve 6 may also be other types of flow-adjustable fluid components.

[0069] The first end of the refrigerant branch is connected to the exhaust port or return port of compressor 1 on the main refrigerant line. In this embodiment, the first end of the refrigerant branch is connected to the exhaust port of compressor 1 on the main refrigerant line, and the pipeline between the first control valve 7 and the second control valve 8 is connected to the second end of the refrigerant branch. In this embodiment, the pipeline between the heat dissipation module 5 and the first control valve 7 is connected to the second end of the refrigerant branch.

[0070] The energy storage device 10 contains an energy storage substance. When the refrigerant flows through the energy storage device 10 in the refrigerant branch, the energy storage substance absorbs the heat or cold energy of the refrigerant and stores it. In this embodiment, the energy storage device 10 is a water tank or a water heater. In other embodiments, the energy storage device 10 may also be other types of devices with energy storage functions made of energy storage substances, such as devices containing molten salt.

[0071] An outdoor fan 41 is installed corresponding to the outdoor heat exchanger 4, which drives outdoor air to exchange heat with the outdoor heat exchanger 4. An indoor fan is installed corresponding to the indoor heat exchanger 9, and both the indoor fan and the outdoor fan 41 are connected to the control device 100.

[0072] In this embodiment, there is more than one indoor unit, which is distributed in different indoor spaces and connected in parallel. In other embodiments, there may be only one indoor unit.

[0073] In this embodiment, the refrigerant main circuit also includes a reversing assembly connected to the control device 100. The return port of the compressor 1, the exhaust port of the compressor 1, the indoor heat exchanger 9 and the outdoor heat exchanger 4 are all connected to the reversing assembly.

[0074] In one implementation of this embodiment, the reversing assembly includes a first four-way valve 2 and a second four-way valve 3. The exhaust port of the compressor 1, the indoor heat exchanger 9, the return port of the compressor 1, and the first sealing member are respectively connected to different valve ports of the first four-way valve 2. The exhaust port of the compressor 1, the return port of the compressor 1, the outdoor heat exchanger 4, and the second sealing member are respectively connected to different valve ports of the second four-way valve 3.

[0075] The first four-way valve 2 has a first valve position and a second valve position. When the first four-way valve 2 is in the first valve position, the return port of the compressor 1 is connected to the indoor heat exchanger 9, and the exhaust port is connected to the first sealing element. When the first four-way valve 2 is in the second valve position, the exhaust port of the compressor 1 is connected to the indoor heat exchanger 9, and the return port is connected to the first sealing element. The first four-way valve 2 can be equivalent to a three-way valve. When the three-way valve is in the first state, the return port of the compressor 1 is connected to the indoor heat exchanger 9; when the three-way valve is in the second state, the exhaust port of the compressor 1 is connected to the indoor heat exchanger 9.

[0076] The second four-way valve 3 has a third valve position and a fourth valve position. When the second four-way valve 3 is in the third valve position, the return port of the compressor 1 is connected to the outdoor heat exchanger 4, and the exhaust port is connected to the second sealing element. When the second four-way valve 3 is in the fourth valve position, the exhaust port of the compressor 1 is connected to the outdoor heat exchanger 4, and the return port is connected to the second sealing element. The second four-way valve 3 can be equivalent to a three-way valve. When the three-way valve is in the first state, the return port of the compressor 1 is connected to the outdoor heat exchanger 4; when the three-way valve is in the second state, the exhaust port of the compressor 1 is connected to the outdoor heat exchanger 4.

[0077] In one implementation of this embodiment, the reversing assembly further includes a reversing valve (not shown). The reversing valve can be a four-way valve or a three-way valve. The reversing valve has a first state and a second state. When the reversing valve is in the first state, the return port of the compressor 1 is connected to the energy storage device 10. When the reversing valve is in the second state, the exhaust port of the compressor 1 is connected to the energy storage device 10.

[0078] With the cooperation of the first four-way valve 2 and the second four-way valve 3, the heat pump system can switch between several different modes:

[0079] Reference Figure 1In the first mode, the indoor unit is in cooling mode, the energy storage device 10 is in a stopped energy storage state, the first control valve 7 operates at a throttling rate, the third control valve 6 operates at an opening less than or equal to the minimum opening, the second control valve 8 is open, the first four-way valve 2 operates at the first valve position, and the second four-way valve 3 operates at the fourth valve position. The refrigerant discharged from the compressor 1 in the main refrigerant circuit flows sequentially through the outdoor heat exchanger 4, the second control valve 8, the heat dissipation module 5, the first control valve 7, and the indoor heat exchanger 9 before returning to the compressor 1. During this mode, the energy storage device 10 is stopped storing energy. In the first mode, the indoor heat exchanger 9 is in an evaporating state, and the outdoor heat exchanger 4 is in a condensing state.

[0080] Reference Figure 2 In the second mode, the indoor unit is in heating mode, and the energy storage device 10 is in a stopped energy storage state. The first control valve 7 is open, the third control valve 6 operates at an opening less than or equal to the minimum opening, the second control valve 8 operates at a throttling rate, the first four-way valve 2 operates at the second valve position, and the second four-way valve 3 operates at the third valve position. The refrigerant discharged from the compressor 1 flows sequentially through the indoor heat exchanger 9, the first control valve 7, the heat dissipation module 5, the second control valve 8, and the outdoor heat exchanger 4 before returning to the compressor 1. During this mode, the energy storage device 10 is stopped storing energy. In the second mode, the indoor heat exchanger 9 is in a condensing state, and the outdoor heat exchanger 4 is in an evaporating state.

[0081] Reference Figure 3 In the third mode, the indoor unit stops heat exchange, the energy storage device 10 is in energy storage state, the first control valve 7 is closed or operates at its minimum opening, the third control valve 6 operates at an opening greater than the minimum opening, the second control valve 8 operates at a throttling rate, the first four-way valve 2 operates at its second valve position, the second four-way valve 3 operates at its third valve position, and the exhaust port of the compressor 1 is connected to the energy storage device 10 (if the reversing assembly includes the aforementioned reversing valve, then the reversing valve is in its second state). The refrigerant flowing out of the compressor 1 flows sequentially through the refrigerant branch, the heat dissipation module 5, the second control valve 8, and the outdoor heat exchanger 4 before returning to the compressor 1. In the third mode, the outdoor heat exchanger 4 is in an evaporation state.

[0082] Reference Figure 4In the fourth mode, the indoor unit is in cooling mode, the energy storage device 10 is in energy storage mode, the first control valve 7 operates in throttling mode, the third control valve 6 is open at an opening greater than the minimum opening, the second control valve 8 operates at an opening greater than or equal to the preset opening, the first four-way valve 2 operates in the first valve position, the second four-way valve 3 operates in the fourth valve position, and the exhaust port of the compressor 1 is connected to the energy storage device 10 (if the reversing assembly includes the aforementioned reversing valve, then the reversing valve is in the second state). The refrigerant discharged from the compressor 1 in the main refrigerant circuit flows sequentially through the outdoor heat exchanger 4, the second control valve 8, the heat dissipation module 5, the first control valve 7, and the indoor heat exchanger 9 before returning to the compressor 1. A portion of the refrigerant flowing through the main refrigerant circuit can flow through the refrigerant branch circuit and store energy in the energy storage device 10. In the fourth mode, the indoor heat exchanger 9 is in evaporation mode, and the outdoor heat exchanger 4 is in condensation mode.

[0083] Reference Figure 5 In the fifth mode, the indoor unit is in cooling mode, the energy storage device 10 is in energy storage mode, the first end of the refrigerant branch is connected to the exhaust port of the compressor 1, the first control valve 7 and the second control valve 8 operate at a throttling rate, the third control valve 6 is opened at an opening greater than the minimum opening, the first four-way valve 2 operates at the first valve position, the second four-way valve 3 operates at the third valve position, the exhaust port of the compressor 1 is connected to the energy storage device 10 (if the reversing assembly includes the aforementioned reversing valve, then the reversing valve is in the second state), the refrigerant discharged from the compressor 1 first flows into the refrigerant branch and stores energy in the energy storage device 10, part of the refrigerant flowing out of the refrigerant branch flows through the first control valve 7 and the indoor heat exchanger 9 and then flows back to the compressor 1, and the other part of the refrigerant flowing out of the refrigerant branch flows through the heat dissipation module 5, the second control valve 8 and the outdoor heat exchanger 4 and then flows back to the compressor 1. In the fifth mode, the indoor heat exchanger 9 is in evaporation mode, and the outdoor heat exchanger 4 is in evaporation mode.

[0084] Reference Figure 6 In the sixth mode, the indoor unit is in heating mode, the energy storage device 10 is in energy storage mode, the first control valve 7 and the third control valve 6 are open, the second control valve 8 operates at a throttling speed, the first four-way valve 2 operates in the second valve position, the second four-way valve 3 operates in the third valve position, and the exhaust port of the compressor 1 is connected to the energy storage device 10 (if the reversing assembly includes the aforementioned reversing valve, then the reversing valve is in the second state). The refrigerant discharged from the compressor 1 flows sequentially through the indoor heat exchanger 9, the first control valve 7, the heat dissipation module 5, the second control valve 8, and the outdoor heat exchanger 4 before returning to the compressor 1. A portion of the refrigerant flowing through the main refrigerant path can flow through the refrigerant branch path and store energy in the energy storage device 10. In the sixth mode, the indoor heat exchanger 9 is in a condensing state, and the outdoor heat exchanger 4 is in an evaporating state.

[0085] In another implementation of this embodiment, the reversing assembly includes a third four-way valve, and the exhaust port of compressor 1, the return port of compressor 1, the indoor heat exchanger 9, and the outdoor heat exchanger 4 are respectively connected to different ports of the third four-way valve. Alternatively, the first four-way valve 2 and the second four-way valve 3 in the reversing assembly can be replaced by a first three-way valve and a second three-way valve, respectively, eliminating the sealing element and its connected port.

[0086] In other embodiments, the heat pump system may also exclude the reversing assembly, with the exhaust port of compressor 1, indoor heat exchanger 9, first control valve 7, second control valve 8, outdoor heat exchanger 4, and return port of compressor 1 connected in sequence in the refrigerant main circuit.

[0087] Furthermore, the heat pump system also includes a temperature detection module 01, which is connected to the control device 100. The temperature detection module 01 includes a first temperature sensor and a second temperature sensor. The first temperature sensor is disposed on the surface of the heat dissipation module 5 to detect a first temperature of the heat dissipation module 5; the second temperature sensor is disposed in the environment in which the heat dissipation module 5 is located to detect a second temperature of the heat dissipation module 5.

[0088] In this embodiment of the invention, reference is made to Figure 7 The control device 100 of the heat pump system includes a processor 1001, such as a CPU, a memory 1002, and a timer 1003. These components communicate with each other via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0089] Those skilled in the art will understand that Figure 7 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0090] like Figure 7 As shown, the memory 1002, which serves as a computer storage medium, may include a control program for a heat pump system.

[0091] exist Figure 7 In the device shown, the processor 1001 can be used to call the control program of the heat pump system stored in the memory 1002 and execute the relevant steps of the control method of the heat pump system in the following embodiments.

[0092] This invention also provides a control method for a heat pump system.

[0093] Reference Figure 8This application proposes an embodiment of a control method for a heat pump system. In this embodiment, the control method for the heat pump system includes:

[0094] Step S10: Obtain the first temperature of the heat dissipation module and the second temperature of the environment where the heat dissipation module is located;

[0095] The first temperature can be obtained by acquiring the temperature data detected in real time by the first temperature sensor. The second temperature can be obtained by acquiring the temperature data detected in real time by the second temperature sensor.

[0096] During the operation of the heat pump system, the first and second temperatures can be acquired at target intervals. The target interval can be a pre-set fixed duration or a duration determined based on the actual operating conditions of the heat pump system. For example, the target interval can be determined based on the temperature of the heat dissipation module detected in the previous cycle, the ambient temperature of the heat dissipation module, the opening degrees of the first, second, and third control valves, and the speed of the outdoor fan. The target interval can then be determined based on these characteristic values, and so on.

[0097] Step S20: Control at least one of the first control valve, the second control valve, and the third control valve to operate according to the first temperature and the second temperature to reduce the condensation risk of the heat dissipation module, and / or control the outdoor fan corresponding to the outdoor heat exchanger to operate according to the first temperature and the second temperature to reduce the condensation risk of the heat dissipation module.

[0098] Specifically, the opening control parameters of at least one of the first, second, and third control valves can be determined based on the first and second temperatures, and the corresponding control valves can be controlled to operate according to the opening control parameters. The opening control parameters include decreasing or increasing the opening, prohibiting increasing or decreasing the opening, limiting the minimum allowable opening, limiting the maximum allowable opening, or the target opening for preventing condensation, etc.

[0099] The first, second, and third control valves, whose opening is controlled by adjusting for the first and second temperatures, are defined as target refrigerant valves. At least one of these control valves can be controlled based on the first temperature, the second temperature, and the current operating mode of the heat pump system. Different operating modes correspond to different target refrigerant valves, and the relationships between the first and second temperatures and the opening control parameters of the target refrigerant valve differ for each operating mode. Specifically, the target refrigerant valve among the first, second, and third control valves can be determined based on the current operating mode of the heat pump system. When the first and second temperatures meet the preset conditions for condensation on the heat dissipation module, the target refrigerant valve is controlled to operate according to the opening control parameters corresponding to the current operating mode.

[0100] Specifically, the speed control parameters of the outdoor fan can be determined based on the first and second temperatures, and the corresponding outdoor fan can be controlled according to the speed control parameters. The speed control parameters include reducing the speed, increasing the speed, prohibiting increasing the speed, prohibiting decreasing the speed, limiting the minimum allowable speed, limiting the maximum allowable speed, or the target speed for preventing condensation, etc.

[0101] The outdoor fan operation can be controlled based on the first temperature, the second temperature, and the current operating mode of the heat pump system. Different operating modes result in different relationships between the first temperature, the second temperature, and the outdoor fan speed control parameters. When the first temperature and the second temperature meet the preset conditions for condensation on the heat dissipation module, the outdoor fan is controlled to operate in anti-condensation mode according to the speed control parameters corresponding to the current operating mode.

[0102] Alternatively, determine the heat exchange state (evaporation state or condensation state) of the outdoor heat exchanger in the current operating mode of the heat pump system. When the first temperature and the second temperature meet the preset conditions for condensation of the heat dissipation module, control the outdoor fan to operate against condensation according to the speed control parameters corresponding to the current heat exchange state. Different heat exchange states correspond to different speed control parameters.

[0103] This invention proposes a control method for a heat pump system. The heat pump system includes a refrigerant main circuit and refrigerant branch circuits connected to the refrigerant main circuit. The refrigerant main circuit includes a compressor and, in sequence, an indoor heat exchanger, a first control valve, a heat dissipation module for heat dissipation of heat-generating components, a second control valve, and an outdoor heat exchanger. The refrigerant branch circuit includes a third control valve and an energy storage device. Based on this heat pump system, a first temperature of the heat dissipation module and a second temperature of the environment where the heat dissipation module is located can accurately reflect the condensation risk of the heat dissipation module. The operation of at least one of the first, second, and third control valves and / or the operation of the outdoor fan can be regulated according to the first and second temperatures, thereby reducing the condensation risk of the heat dissipation module, avoiding damage to heat-generating components, and effectively improving the reliability of the heat pump system.

[0104] Furthermore, based on the above embodiments, another embodiment of the control method for the heat pump system of this application is proposed. In this embodiment, the control valve that is not located in the refrigerant inflow direction of the heat dissipation module among the first control valve and the second control valve is defined as the first target control valve, and the control valve that is located in the refrigerant inflow direction of the heat dissipation module among the first control valve and the second control valve is defined as the second target control valve. The refrigerant main circuit also includes a compressor connected to the indoor heat exchanger and the outdoor heat exchanger respectively, the first end of the refrigerant branch is connected to the exhaust port of the compressor, and the pipeline between the heat dissipation module and the first control valve is connected to the second end of the refrigerant branch. Here, the first target control valve may include a first control valve or a second control valve in the refrigerant outflow direction of the heat dissipation module, or a first control valve or a second control valve on a different refrigerant flow path from the heat dissipation module. Different operating modes of the heat pump system result in different refrigerant flow directions in the heat pump system, and the corresponding first target control valve and second target control valve may be different. When the heat pump system has more than one operating mode, the first target control valve and the second target control valve can be determined according to the current operating mode of the heat pump system. Refer to Figure 9 The step of controlling at least one of the first control valve, the second control valve, and the third control valve to operate based on the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes:

[0105] Step S21: When the first temperature is less than or equal to the second temperature, control the first target control valve to reduce its opening, and / or control the second target control valve to operate at an opening greater than a preset opening, and / or control the third control valve to operate at an opening greater than a preset opening.

[0106] When the first temperature is less than or equal to the second temperature, it indicates that the heat dissipation module is currently at risk of condensation, and the risk is relatively high.

[0107] When the first target control valve is operating at a reduced opening, it helps to increase the condensing pressure of the heat pump system, thereby increasing the temperature of the refrigerant flowing into the heat dissipation module and reducing the risk of condensation on the heat dissipation module.

[0108] The opening of the first target control valve can be reduced by a pre-set fixed opening adjustment value. For example, a preset opening adjustment value of 20pls can be used to reduce the current opening of the first target control valve. Alternatively, the opening adjustment value can be determined based on the actual operating status of the heat pump system. For example, the opening adjustment value can be determined based on the operating speed of the outdoor fan and / or the discharge pressure of the compressor and / or the condensing pressure of the heat pump system and / or the current opening of the third control valve and / or the temperature difference between the current temperature of the energy storage device and the target energy storage temperature when the third control valve is open. These parameters can accurately reflect the worsening trend of condensation risk of the heat dissipation module. Therefore, determining the corresponding opening adjustment value through these parameters to control the opening of the first target control valve is beneficial to further reduce the condensation risk of the heat dissipation module.

[0109] When the second target control valve operates at an opening greater than the preset opening, it helps to reduce the throttling effect of the refrigerant flowing into the heat dissipation module, increase the condensing pressure of the heat pump system, and increase the temperature of the refrigerant flowing into the heat dissipation module, thereby reducing the risk of condensation on the heat dissipation module.

[0110] In this embodiment, operating the second target control valve at an opening greater than a preset opening degree includes controlling the second target control valve to operate at its maximum opening degree. The preset opening degree is less than the maximum opening degree of the second target control valve; the preset opening degree can be 70% of the maximum opening degree. The second target control valve can operate at an opening degree smaller than the maximum opening degree but larger than the preset opening degree. The specific operating opening degree of the second target control valve can be a pre-set fixed opening degree or an opening degree determined based on the actual operating state of the heat pump system. For example, the opening degree adjustment value can be determined based on the temperature difference between the first and second temperatures and / or the current opening degree of the third control valve and / or the current speed of the outdoor fan and / or the temperature difference between the current temperature of the energy storage device and the target energy storage temperature when the third control valve is opened. These parameters can accurately reflect the worsening trend of condensation risk in the heat dissipation module. Therefore, determining the corresponding opening degree adjustment value through these parameters to control the operating opening degree of the second target control valve is beneficial to further reduce the condensation risk of the heat dissipation module.

[0111] When the third control valve operates at an opening greater than the preset opening, the amount of refrigerant circulating in the main refrigerant circuit decreases, which can increase the condensing pressure of the heat pump system and increase the temperature of the refrigerant flowing into the heat dissipation module, thereby reducing the risk of condensation on the heat dissipation module.

[0112] In this embodiment, operating the third control valve at an opening greater than a preset opening degree includes controlling the third control valve to operate at its maximum opening degree. The preset opening degree is less than the maximum opening degree of the third control valve; the preset opening degree can be 70% of the maximum opening degree. The third control valve can operate at an opening degree smaller than the maximum opening degree but larger than the preset opening degree. The specific operating opening degree of the third control valve can be a pre-set fixed opening degree or an opening degree determined based on the actual operating state of the heat pump system. For example, the opening degree adjustment value can be determined based on the temperature difference between the first and second temperatures and / or the current opening degree of the third control valve and / or the current speed of the outdoor fan and / or the temperature difference between the current temperature of the energy storage device and the target energy storage temperature when the third control valve is opened. These parameters can accurately reflect the worsening trend of condensation risk of the heat dissipation module and the energy storage demand of the energy storage device. Determining the corresponding opening degree adjustment value through these parameters to control the operating opening degree of the second target control valve is beneficial for further reducing the condensation risk of the heat dissipation module while meeting the energy storage demand of the energy storage device.

[0113] Specifically, when the first temperature is less than or equal to the second temperature, under the current operating mode of the heat pump system, if the first control valve is currently open and is the first target control valve, the first control valve can be controlled to reduce its opening degree; if the first control valve is currently open and is the second target control valve, the first control valve can be controlled to operate at an opening degree greater than a preset degree. Similarly, when the first temperature is less than or equal to the second temperature, under the current operating mode of the heat pump system, if the third control valve's current opening degree is greater than its minimum opening degree, the third control valve can be controlled to operate at an opening degree greater than a preset degree.

[0114] Step S22: When the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, control the first target control valve to operate at an opening less than or equal to the current opening, and / or control the second target control valve to operate at an opening greater than or equal to the current opening, and / or control the third control valve to operate at an opening greater than or equal to the current opening; wherein, the third temperature is obtained by increasing the second temperature by a preset adjustment value.

[0115] The sum of the preset adjustment value and the second temperature can be used as the third temperature.

[0116] When the first temperature is less than or equal to the third temperature, it indicates that the heat dissipation module currently has a risk of condensation, but the risk is relatively small.

[0117] In this embodiment, the first target control valve operating at an opening less than or equal to its current opening degree means that the opening degree of the first target control valve is prohibited from increasing. The first target control valve can maintain its current opening degree or reduce its opening degree according to the actual operating conditions of the heat pump system. The opening degree adjustment value when reducing the opening degree can be determined by analogy to the method for determining the opening degree adjustment value of the first target control valve mentioned above, and will not be elaborated here.

[0118] In this embodiment, the second target control valve operating at an opening greater than or equal to its current opening degree means that the opening degree of the first target control valve is prohibited from decreasing. The second target control valve can maintain its current opening degree or increase its opening degree according to the actual operating conditions of the heat pump system. The opening degree adjustment value when increasing the opening degree can be determined by analogy to the method for determining the opening degree adjustment value of the first target control valve mentioned above, and will not be elaborated here.

[0119] In this embodiment, operating the third control valve at an opening greater than or equal to its current opening degree means that the opening degree of the third control valve is prohibited from decreasing. The third control valve can maintain its current opening degree or increase its opening degree according to the actual operating conditions of the heat pump system. The opening degree adjustment value when increasing the opening degree can be determined by analogy to the method for determining the opening degree adjustment value of the first target control valve mentioned above, and will not be elaborated here.

[0120] The preset conditions for the existence of condensation risk mentioned in the above embodiments include the first temperature being less than or equal to the third temperature.

[0121] It should be noted that the order in which steps S21 and S22 are executed is not specifically limited.

[0122] In this embodiment, when the risk of condensation on the heat dissipation module is high, adjusting the opening of the first and / or second control valves in a direction that reduces the risk of condensation and limiting the operation of the third control valve within the opening range that eliminates the risk of condensation helps to increase the system's condensing pressure and raise the temperature of the refrigerant flowing into the heat dissipation module, thereby ensuring an effective reduction in the risk of condensation. When the risk of condensation on the heat dissipation module is low, limiting the direction of the opening changes of the first and / or second and / or third control valves helps to prevent further reduction in the system's condensing pressure, avoids further reduction in the temperature of the refrigerant flowing into the heat dissipation module, and prevents further deterioration of the risk of condensation, thereby effectively preventing condensation on the heat dissipation module. Furthermore, when the heat pump system switches between different operating modes, even if the refrigerant flow direction changes, the above-described adjustment method can be used to effectively eliminate the risk of condensation on the heat dissipation module, ensuring reliable operation of the heat pump system in different operating modes.

[0123] Furthermore, in the first implementation of this embodiment, the steps of controlling the first target control valve to reduce its opening degree and / or controlling the second target control valve to operate at an opening degree greater than a preset opening degree when the first temperature is less than or equal to the second temperature, and / or controlling the third control valve to operate at an opening degree greater than a preset opening degree, include: during the operation of the heat pump system in the first mode, when the first temperature is less than or equal to the second temperature, controlling the first control valve to reduce its opening degree and controlling the second control valve to operate at an opening degree greater than a preset opening degree.

[0124] The steps of controlling the first target control valve to operate at a current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree, and / or controlling the third control valve to operate at a current opening degree include: during the operation of the heat pump system in the first mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, controlling the first control valve to operate at a current opening degree and controlling the second control valve to operate at a current opening degree.

[0125] In the first mode of operation: the outdoor heat exchanger is connected to the exhaust port of the compressor, the indoor heat exchanger is connected to the return port of the compressor, the first control valve operates at a throttling rate, the second control valve is open, and the third control valve operates at an opening less than or equal to the minimum opening degree. The first target control valve is the first control valve, and the second target control valve is the second control valve.

[0126] The first and second temperatures are obtained during the operation of the heat pump system in the first mode.

[0127] In this embodiment, the heat pump system includes the aforementioned first four-way valve and second four-way valve. When the heat pump system starts in the first mode, the first control valve can be controlled to operate at a throttling speed, the second control valve can be controlled to operate at an opening greater than a preset degree (e.g., the maximum opening), and the third control valve can be controlled to close or operate at the minimum opening. The refrigerant discharged from the compressor in the main refrigerant circuit flows sequentially through the outdoor heat exchanger, the second control valve, the heat dissipation module, the first control valve, and the indoor heat exchanger before returning to the compressor. During this process, the energy storage device stops storing energy. In the first mode, the indoor heat exchanger is in an evaporating state, and the outdoor heat exchanger is in a condensing state.

[0128] In this embodiment, when the heat pump system is cooling alone without storing energy, the two control valves on the inlet and outlet of the heat dissipation module are simultaneously adjusted to adapt to the current condensation risk, which helps to improve the system's anti-condensation adjustment capability and reduce the condensation risk of the heat dissipation module in the system's cooling mode alone.

[0129] In other embodiments, the heat pump system is not equipped with a commutation component, and when the heat pump system is turned on and fixedly running in the first mode, it can also be controlled in the manner described above.

[0130] Furthermore, in the second implementation of this embodiment, the steps of controlling the first target control valve to reduce its opening degree when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening degree greater than a preset opening degree, and / or controlling the third control valve to operate at an opening degree greater than a preset opening degree include: during the second operation mode of the heat pump system, when the first temperature is less than or equal to the second temperature, controlling the second control valve to reduce its opening degree, and controlling the first control valve to operate at an opening degree greater than a preset opening degree.

[0131] The steps of controlling the first target control valve to operate at a current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree, and / or controlling the third control valve to operate at a current opening degree include: during the operation of the heat pump system in the second mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, controlling the second control valve to operate at a current opening degree and controlling the first control valve to operate at a current opening degree.

[0132] In the second mode of operation: the indoor heat exchanger is connected to the exhaust port of the compressor, the outdoor heat exchanger is connected to the return port of the compressor, the first control valve is open, the second control valve operates at a throttling rate, and the third control valve operates at an opening less than or equal to the minimum opening degree.

[0133] The first and second temperatures are obtained during the operation of the heat pump system in the second mode.

[0134] In this embodiment, the heat pump system includes the aforementioned first four-way valve and second four-way valve. When the heat pump system starts in the second mode, the first control valve can be controlled to open at an opening greater than a preset opening (e.g., maximum opening), the second control valve can be controlled to operate in a throttling manner, and the third control valve can be controlled to close or open at its minimum opening. The refrigerant discharged from the compressor flows sequentially through the indoor heat exchanger, the first control valve, the heat dissipation module, the second control valve, and the outdoor heat exchanger before returning to the compressor, during which the energy storage device stops storing energy. In the second mode, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state. The first target control valve is the second control valve, and the second target control valve is the first control valve.

[0135] In this embodiment, when the heat pump system is heating alone without storing energy, the two control valves on the inlet and outlet of the heat dissipation module are simultaneously adjusted to adapt to the current condensation risk, which helps to improve the system's anti-condensation adjustment capability and reduce the condensation risk of the heat dissipation module in the system's heating mode alone.

[0136] In other embodiments, the heat pump system is not equipped with a commutation component, and the heat pump system can be controlled in the manner described above when it is running in the fixed second mode.

[0137] Furthermore, in the third implementation of this embodiment, the steps of controlling the first target control valve to reduce its opening degree when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening degree greater than a preset opening degree, and / or controlling the third control valve to operate at an opening degree greater than a preset opening degree include: during the operation of the heat pump system in the third mode, when the first temperature is less than or equal to the second temperature, controlling the second control valve to reduce its opening degree, and controlling the third control valve to operate at an opening degree greater than a preset opening degree.

[0138] The steps of controlling the first target control valve to operate at a current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree, and / or controlling the third control valve to operate at a current opening degree include: during the operation of the third mode of the heat pump system, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, controlling the second control valve to operate at a current opening degree and controlling the third control valve to operate at a current opening degree.

[0139] During the third mode of operation: the indoor heat exchanger is connected to the return port of the compressor, the outdoor heat exchanger is connected to the return port of the compressor, the third control valve operates at an opening greater than the minimum opening, the second control valve operates at a throttling rate, and the first control valve is closed.

[0140] The first and second temperatures are obtained during the operation of the heat pump system in the third mode.

[0141] In this embodiment, the heat pump system includes the aforementioned first four-way valve and second four-way valve. When the heat pump system starts in the third mode, the first control valve is closed or operates at its minimum opening, the third control valve operates at an opening greater than a preset opening (e.g., maximum opening), the second control valve operates at a throttling rate, the first four-way valve operates at its second valve position, and the second four-way valve operates at its third valve position. The refrigerant flowing from the compressor flows sequentially through the refrigerant branch, the heat dissipation module, the second control valve, and the outdoor heat exchanger before returning to the compressor. In the third mode, the outdoor heat exchanger is in an evaporation state. The second target control valve is the second control valve.

[0142] In this embodiment, when the heat pump system stores energy without exchanging heat, the control valve on the outlet of the heat dissipation module and the control valve on the refrigerant branch are adjusted simultaneously to adapt to the current condensation risk. This helps to improve the system's anti-condensation adjustment capability and reduce the condensation risk of the heat dissipation module in the system's standalone energy storage mode.

[0143] In other embodiments, the heat pump system is not equipped with a commutation component, and when the heat pump system is turned on and fixedly running in the third mode, it can also be controlled in the manner described above.

[0144] Furthermore, in the fourth implementation of this embodiment, the steps of controlling the first target control valve to reduce its opening degree when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening degree greater than a preset opening degree, and / or controlling the third control valve to operate at an opening degree greater than a preset opening degree include: during the operation of the heat pump system in the fourth mode, when the first temperature is less than or equal to the second temperature, controlling the first control valve to reduce its opening degree, controlling the second control valve to operate at an opening degree greater than a preset opening degree, and controlling the third control valve to operate at an opening degree greater than a preset opening degree.

[0145] The steps of controlling the first target control valve to operate at a current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree, and / or controlling the third control valve to operate at a current opening degree include: during the operation of the heat pump system in the fourth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, controlling the first control valve to operate at a current opening degree, controlling the second control valve to operate at a current opening degree, and controlling the third control valve to operate at a current opening degree.

[0146] During the operation of the fourth mode: the outdoor heat exchanger is connected to the exhaust port of the compressor, the indoor heat exchanger is connected to the return port of the compressor, the first control valve operates at a throttling rate, the second control valve is open, and the third control valve is opened at an opening greater than the minimum opening degree.

[0147] The first and second temperatures are obtained during the operation of the heat pump system in its fourth mode.

[0148] In this embodiment, the heat pump system includes the aforementioned first four-way valve and second four-way valve. When the heat pump system starts in the fourth mode, the first control valve is controlled to operate at a throttling speed, the third control valve is controlled to open at an opening greater than a preset opening degree (e.g., maximum opening), and the second control valve is controlled to operate at an opening greater than or equal to a preset opening degree (e.g., maximum opening). The first four-way valve operates at the first valve position, and the second four-way valve operates at the fourth valve position. The refrigerant discharged from the compressor in the main refrigerant circuit flows sequentially through the outdoor heat exchanger, the second control valve, the heat dissipation module, the first control valve, and the indoor heat exchanger before returning to the compressor. A portion of the refrigerant flowing through the main refrigerant circuit can flow through a refrigerant branch circuit and store energy in the energy storage device. In the fourth mode, the indoor heat exchanger is in an evaporation state, and the outdoor heat exchanger is in a condensation state. The first target control valve is the first control valve, and the second target control valve is the second control valve.

[0149] In the fourth mode, the indoor heat exchanger absorbs heat in an evaporating state, the outdoor heat exchanger releases heat in a condensing state, and the heat pump system is in a partial heat recovery state. Heat can be absorbed into the system through the indoor heat exchanger, and excess heat in the refrigerant can be stored in the energy storage device.

[0150] In this embodiment, when the heat pump system is cooling and storing energy simultaneously, the two control valves on the inlet and outlet of the heat dissipation module and the control valve on the refrigerant branch are simultaneously adjusted to adapt to the current condensation risk. This helps to improve the system's anti-condensation adjustment capability and reduce the condensation risk of the heat dissipation module in the mode of cooling and storing energy simultaneously.

[0151] In other embodiments, the heat pump system is not equipped with a commutation component, and when the heat pump system is turned on and fixedly running in the fourth mode, it can also be controlled in the manner described above.

[0152] Furthermore, in the fifth implementation of this embodiment, the steps of controlling the first target control valve to reduce its opening degree when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening degree greater than a preset opening degree, and / or controlling the third control valve to operate at an opening degree greater than a preset opening degree include: during the operation of the heat pump system in the fifth mode, when the first temperature is less than or equal to the second temperature, controlling the first control valve to reduce its opening degree, controlling the second control valve to reduce its opening degree, and controlling the third control valve to operate at an opening degree greater than a preset opening degree.

[0153] The steps of controlling the first target control valve to operate at a current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree, and / or controlling the third control valve to operate at a current opening degree include: during the operation of the heat pump system in the fifth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, controlling the first control valve to operate at a current opening degree, controlling the second control valve to operate at a current opening degree, and controlling the third control valve to operate at a current opening degree.

[0154] During the operation of the fifth mode: both the outdoor heat exchanger and the indoor heat exchanger are connected to the return port of the compressor; both the first control valve and the second control valve operate at a throttling rate; and the third control valve is opened at an opening greater than the minimum opening degree.

[0155] The first and second temperatures are obtained during the operation of the heat pump system in the fifth mode.

[0156] In this embodiment, the heat pump system includes the aforementioned first four-way valve and second four-way valve. When the heat pump system starts in the fifth mode, both the first and second control valves are controlled to operate at a throttling rate, and the third control valve is controlled to open at an opening greater than a preset degree (e.g., the maximum opening). The first four-way valve is controlled to operate at the first valve position, and the second four-way valve is controlled to operate at the third valve position. The refrigerant discharged from the compressor first flows into the refrigerant branch and stores energy in the energy storage device. A portion of the refrigerant flowing out of the refrigerant branch flows through the first control valve and the indoor heat exchanger before returning to the compressor. The other portion of the refrigerant flowing out of the refrigerant branch flows through the heat dissipation module, the second control valve, and the outdoor heat exchanger before returning to the compressor. In the fifth mode, both the indoor and outdoor heat exchangers are in an evaporating state. Both the first and second control valves are first target control valves.

[0157] In the fifth mode, both the indoor and outdoor heat exchangers are in an evaporative state, absorbing heat. The heat pump system is in a full heat recovery state, and heat from the indoor and outdoor environments can be absorbed into the system through the indoor and outdoor heat exchangers, respectively. Excess heat in the refrigerant can be stored in the energy storage device. In the fifth mode, the energy available for storage is greater than the energy stored in the energy storage device in the fourth mode.

[0158] In this embodiment, when the heat pump system is cooling and storing energy simultaneously, the two control valves on the inlet and outlet of the heat dissipation module and the control valve on the refrigerant branch are simultaneously adjusted to adapt to the current condensation risk. This helps to improve the system's anti-condensation adjustment capability and reduce the condensation risk of the heat dissipation module in the mode of cooling and storing energy simultaneously.

[0159] In other embodiments, the heat pump system is not equipped with a commutation component, and when the heat pump system is turned on and fixedly running in the fifth mode, it can also be controlled in the manner described above.

[0160] Furthermore, in the sixth implementation of this embodiment, the steps of controlling the first target control valve to reduce its opening degree and / or controlling the second target control valve to operate at an opening degree greater than a preset opening degree when the first temperature is less than or equal to the second temperature, and / or controlling the third control valve to operate at an opening degree greater than a preset opening degree, include: during the operation of the heat pump system in the sixth mode, when the first temperature is less than or equal to the second temperature, controlling the first control valve to operate at an opening degree greater than a preset opening degree, controlling the second control valve to reduce its opening degree, and controlling the third control valve to operate at an opening degree greater than a preset opening degree.

[0161] The steps of controlling the first target control valve to operate at a current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree, and / or controlling the third control valve to operate at a current opening degree include: during the operation of the sixth mode of the heat pump system, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, controlling the first control valve to operate at a current opening degree, controlling the second control valve to operate at a current opening degree, and controlling the third control valve to operate at a current opening degree.

[0162] In the sixth mode of operation: the outdoor heat exchanger is connected to the return port of the compressor, the indoor heat exchanger is connected to the exhaust port of the compressor, the first control valve is open, the second control valve operates at a throttling rate, and the third control valve is opened at an opening greater than the minimum opening degree.

[0163] The first and second temperatures are obtained during the operation of the heat pump system in its sixth mode.

[0164] In this embodiment, the heat pump system includes the aforementioned first four-way valve and second four-way valve. When the heat pump system starts in the sixth mode, the first and third control valves are controlled to operate at an opening greater than a preset degree (e.g., maximum opening), the second control valve is controlled to operate at a throttling degree, the first four-way valve is controlled to operate at the second valve position, and the second four-way valve is controlled to operate at the third valve position. The refrigerant discharged from the compressor flows sequentially through the indoor heat exchanger, the first control valve, the heat dissipation module, the second control valve, and the outdoor heat exchanger before returning to the compressor. A portion of the refrigerant flowing through the main refrigerant path can flow through the refrigerant branch path and store energy in the energy storage device. In the sixth mode, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state. The first target control valve is the second control valve, and the second target control valve is the first control valve.

[0165] In this embodiment, when the heat pump system is heating and storing energy simultaneously, the two control valves on the inlet and outlet of the heat dissipation module and the control valve on the refrigerant branch are simultaneously adjusted to adapt to the current condensation risk. This helps to improve the system's anti-condensation adjustment capability and reduce the condensation risk of the heat dissipation module in the mode of heating and storing energy simultaneously.

[0166] In other embodiments, the heat pump system is not equipped with a commutation component, and when the heat pump system is turned on and fixedly running in the sixth mode, it can also be controlled in the manner described above.

[0167] Furthermore, when the heat pump system is in a preset mode, the indoor heat exchanger corresponding to the preset mode is in an evaporation state. The demand status of the heat pump system can be obtained. When the demand status is that the cooling demand of the indoor heat exchanger is greater than or equal to the energy storage demand of the energy storage device, the heat pump system is controlled to operate in the fourth mode. When the demand status is that the cooling demand of the indoor heat exchanger is less than the energy storage demand of the energy storage device, the heat pump system is controlled to operate in the fifth mode.

[0168] Specifically, a first temperature difference between the indoor temperature of the room where the indoor heat exchanger is located and a set temperature can be obtained, and a second temperature difference between the current temperature of the energy storage device and the target energy storage temperature can be obtained. The demand state is determined based on the first and second temperature differences. For example, when the first temperature difference is greater than or equal to the second temperature difference, the cooling demand is greater than or equal to the energy storage demand; when the first temperature difference is less than the second temperature difference, the cooling demand is less than the energy storage demand. In other embodiments, a first ratio of the indoor temperature to the set temperature and a second ratio of the current temperature of the energy storage device to the target energy storage temperature can also be determined, and the demand state is determined based on the first and second ratios.

[0169] In this embodiment, when the cooling demand is greater than the energy storage demand, a partial heat recovery method is used for cooling operation, where the indoor heat exchanger absorbs heat and the outdoor heat exchanger releases heat. This helps to avoid excessive heat recovery affecting the cooling capacity of the heat pump system, thereby improving the cooling comfort of the indoor environment while storing energy. When the cooling demand is less than the energy storage demand, a full heat recovery method is used for cooling operation, where both the indoor and outdoor heat exchangers absorb heat. This helps to meet the indoor cooling comfort while ensuring that the system has enough heat to meet the energy storage needs of the energy storage device, thereby improving the energy storage efficiency of the cooling process.

[0170] Furthermore, based on any of the above embodiments, another embodiment of the control method for the heat pump system of this application is proposed. In this embodiment, the step of controlling the operation of the outdoor heat exchanger according to the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes:

[0171] When the outdoor heat exchanger is in a condensing state, and when the first temperature is less than or equal to the second temperature, the outdoor fan is controlled to reduce its speed.

[0172] When the outdoor heat exchanger is in a condensing state, and when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan is controlled to operate at a speed less than or equal to the current speed.

[0173] The third temperature is obtained by increasing the second temperature by a preset adjustment value.

[0174] The third temperature here is the same concept as the third temperature mentioned above, and will not be elaborated upon here.

[0175] Operating the outdoor fan at a speed less than or equal to its current speed means that the outdoor fan speed must not be reduced. The outdoor fan can maintain its current speed or reduce its speed according to the actual operating conditions of the heat pump system.

[0176] The speed adjustment value for reducing the outdoor fan speed can be a pre-set fixed value, such as reducing the fan speed by one level. Alternatively, the speed adjustment value can be determined based on the actual operating conditions of the heat pump system. For example, it can be determined based on the temperature difference between the current and set temperatures of the energy storage device and / or the energy demand of the indoor unit in the current mode and / or the temperature difference between the first and second temperatures and / or the current opening degree of the second control valve and / or the current opening degree of the first control valve and / or the current opening degree of the third control valve and / or the current temperature of the outdoor heat exchanger. This reduces the risk of condensation while meeting the heat exchange requirements of the current mode and improving system reliability.

[0177] Specifically, in the first or fourth mode mentioned above, the outdoor heat exchanger is in a condensation state. When the first temperature is less than or equal to the second temperature, the outdoor fan can be controlled to reduce its speed. When the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan can be controlled to operate at a speed less than or equal to the current speed.

[0178] In this embodiment, while adjusting the opening degree of at least one of the first control valve, the second control valve, and the third control valve according to the first temperature and the second temperature as mentioned above, the speed of the outdoor fan is regulated as mentioned in this embodiment.

[0179] In this embodiment, when the outdoor heat exchanger is in a condensing state, the system condensing pressure can be effectively increased by adjusting the outdoor fan speed in conjunction with the opening of the control valve, thereby effectively eliminating the risk of condensation on the heat dissipation module.

[0180] Furthermore, based on any of the above embodiments, another embodiment of the control method for the heat pump system of this application is proposed. In this embodiment, the step of controlling the operation of the outdoor heat exchanger according to the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes:

[0181] When the outdoor heat exchanger is in an evaporation state, and when the first temperature is less than or equal to the second temperature, the outdoor fan is controlled to increase its speed.

[0182] When the outdoor heat exchanger is in an evaporation state, and when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan is controlled to operate at a speed greater than or equal to the current speed.

[0183] The third temperature is obtained by increasing the second temperature by a preset adjustment value.

[0184] The third temperature here is the same concept as the third temperature mentioned above, and will not be elaborated upon here.

[0185] Operating the outdoor fan at a speed greater than or equal to its current speed means that the outdoor fan speed must not be increased. The outdoor fan can maintain its current speed or increase its speed according to the actual operating conditions of the heat pump system.

[0186] The speed adjustment value for increasing the outdoor fan speed can be a pre-set fixed value, such as lowering the fan speed by one level. Alternatively, the speed adjustment value can be determined based on the actual operating conditions of the heat pump system. For example, it can be determined based on the temperature difference between the current and set temperatures of the energy storage device and / or the energy demand of the indoor unit in the current mode and / or the temperature difference between the first and second temperatures and / or the current opening degree of the second control valve and / or the current opening degree of the first control valve and / or the current opening degree of the third control valve and / or the current temperature of the outdoor heat exchanger. This reduces the risk of condensation while meeting the heat exchange requirements of the current mode and improving system reliability.

[0187] Specifically, in the second, third, fifth, or sixth mode mentioned above, the outdoor heat exchanger is in an evaporation state. When the first temperature is less than or equal to the second temperature, the outdoor fan can be controlled to increase its speed. When the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan can be controlled to operate at a speed greater than or equal to the current speed.

[0188] In this embodiment, while adjusting the opening degree of at least one of the first control valve, the second control valve, and the third control valve according to the first temperature and the second temperature as mentioned above, the speed of the outdoor fan is regulated as mentioned in this embodiment.

[0189] In this embodiment, when the outdoor heat exchanger is in the evaporation state, the system condensation pressure can be effectively increased by adjusting the outdoor fan speed in conjunction with the opening of the control valve, thereby effectively eliminating the risk of condensation on the heat dissipation module.

[0190] Furthermore, embodiments of the present invention also propose a storage medium storing a control program for a heat pump system. When the control program for the heat pump system is executed by a processor, it implements the relevant steps of any embodiment of the control method for the heat pump system described above.

[0191] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0192] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0193] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, heat pump system, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0194] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for a heat pump system, characterized in that, The heat pump system includes a refrigerant main circuit and refrigerant branch circuits connected to the refrigerant main circuit. The refrigerant main circuit includes an indoor heat exchanger, a first control valve, a heat dissipation module, a second control valve, and an outdoor heat exchanger connected to each other. The refrigerant main circuit also includes compressors connected to the indoor and outdoor heat exchangers respectively. The first end of the refrigerant branch circuit is connected to the exhaust port of the compressor. The heat dissipation module is used to dissipate heat from the heat-generating components. The refrigerant branch circuit includes a third control valve and an energy storage device. The pipeline between the heat dissipation module and the first control valve is connected to the second end of the refrigerant branch circuit. The first target control valve is the control valve among the first and second control valves that is not located in the refrigerant inflow direction of the heat dissipation module. The second target control valve is the control valve among the first and second control valves that is located in the refrigerant inflow direction of the heat dissipation module. The control method of the heat pump system includes the following steps: Obtain the first temperature of the heat dissipation module and the second temperature of the environment in which the heat dissipation module is located; When the first temperature is less than or equal to the second temperature, the first target control valve is controlled to reduce its opening, and / or the second target control valve is controlled to operate at an opening greater than the preset opening, and / or the third control valve is controlled to operate at an opening greater than the preset opening. When the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first target control valve is controlled to operate at a degree less than or equal to the current opening, and / or the second target control valve is controlled to operate at a degree greater than or equal to the current opening, and / or the third control valve is controlled to operate at a degree greater than or equal to the current opening. The third temperature is obtained by increasing the second temperature by a preset adjustment value.

2. The control method for a heat pump system as described in claim 1, characterized in that, After the step of obtaining the first temperature of the heat dissipation module and the second temperature of the environment where the heat dissipation module is located, the method further includes: The outdoor fan corresponding to the outdoor heat exchanger is controlled to operate according to the first temperature and the second temperature in order to reduce the risk of condensation on the heat dissipation module.

3. The control method for a heat pump system as described in claim 1, characterized in that, The steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include: During the first mode of operation of the heat pump system, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to reduce its opening, and the second control valve is controlled to operate at an opening greater than the preset opening. The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include: During the operation of the heat pump system in the first mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at a degree less than or equal to the current opening, and the second control valve is controlled to operate at a degree greater than or equal to the current opening. In the first mode of operation: the outdoor heat exchanger is connected to the exhaust port of the compressor, the indoor heat exchanger is connected to the return port of the compressor, the first control valve operates at a throttling rate, the second control valve is open, and the third control valve operates at an opening less than or equal to the minimum opening degree.

4. The control method for a heat pump system as described in claim 1, characterized in that, The steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include: During the second operation mode of the heat pump system, when the first temperature is less than or equal to the second temperature, the second control valve is controlled to reduce its opening, and the first control valve is controlled to operate at an opening greater than the preset opening. The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include: During the operation of the heat pump system in the second mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the second control valve is controlled to operate at a degree less than or equal to the current opening, and the first control valve is controlled to operate at a degree greater than or equal to the current opening. In the second mode of operation: the indoor heat exchanger is connected to the exhaust port of the compressor, the outdoor heat exchanger is connected to the return port of the compressor, the first control valve is open, the second control valve operates at a throttling rate, and the third control valve operates at an opening less than or equal to the minimum opening degree.

5. The control method for a heat pump system as described in claim 1, characterized in that, The steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include: During the operation of the heat pump system in the third mode, when the first temperature is less than or equal to the second temperature, the second control valve is controlled to reduce its opening, and the third control valve is controlled to operate at an opening greater than the preset opening. The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include: During the operation of the heat pump system in the third mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the second control valve is controlled to operate at an opening greater than or equal to the current opening, and the third control valve is controlled to operate at an opening greater than or equal to the current opening. During the third mode of operation: the indoor heat exchanger is connected to the return port of the compressor, the outdoor heat exchanger is connected to the return port of the compressor, the third control valve operates at an opening greater than the minimum opening, the second control valve operates at a throttling rate, and the first control valve is closed.

6. The control method for a heat pump system as described in claim 1, characterized in that, The steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include: During the operation of the heat pump system in the fourth mode, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to reduce its opening, the second control valve is controlled to operate at an opening greater than the preset opening, and the third control valve is controlled to operate at an opening greater than the preset opening. The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include: During the operation of the heat pump system in the fourth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at a degree less than or equal to the current opening, the second control valve is controlled to operate at a degree greater than or equal to the current opening, and the third control valve is controlled to operate at a degree greater than or equal to the current opening. During the operation of the fourth mode: the outdoor heat exchanger is connected to the exhaust port of the compressor, the indoor heat exchanger is connected to the return port of the compressor, the first control valve operates at a throttling rate, the second control valve is open, and the third control valve is opened at an opening greater than the minimum opening degree.

7. The control method for a heat pump system as described in claim 1, characterized in that, The steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include: During the fifth operating mode of the heat pump system, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to reduce its opening, the second control valve is controlled to reduce its opening, and the third control valve is controlled to operate at an opening greater than the preset opening. The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include: During the operation of the heat pump system in the fifth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at a degree less than or equal to the current opening, the second control valve is controlled to operate at a degree less than or equal to the current opening, and the third control valve is controlled to operate at a degree greater than or equal to the current opening. During the operation of the fifth mode: both the outdoor heat exchanger and the indoor heat exchanger are connected to the return port of the compressor; both the first control valve and the second control valve operate at a throttling rate; and the third control valve is opened at an opening greater than the minimum opening degree.

8. The control method for a heat pump system as described in claim 1, characterized in that, The steps of controlling the first target control valve to reduce its opening when the first temperature is less than or equal to the second temperature, and / or controlling the second target control valve to operate at an opening greater than a preset opening, and / or controlling the third control valve to operate at an opening greater than a preset opening, include: During the operation of the heat pump system in the sixth mode, when the first temperature is less than or equal to the second temperature, the first control valve is controlled to operate at an opening greater than the preset opening, the second control valve is controlled to operate at a reduced opening, and the third control valve is controlled to operate at an opening greater than the preset opening. The steps of controlling the first target control valve to operate at a current opening degree less than or equal to the current opening degree when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, and / or controlling the second target control valve to operate at a current opening degree greater than or equal to the current opening degree, and / or controlling the third control valve to operate at a current opening degree greater than or equal to the current opening degree include: During the operation of the heat pump system in the sixth mode, when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the first control valve is controlled to operate at an opening greater than or equal to the current opening, the second control valve is controlled to operate at an opening less than or equal to the current opening, and the third control valve is controlled to operate at an opening greater than or equal to the current opening. In the sixth mode of operation: the outdoor heat exchanger is connected to the return port of the compressor, the indoor heat exchanger is connected to the exhaust port of the compressor, the first control valve is open, the second control valve operates at a throttling rate, and the third control valve is opened at an opening greater than the minimum opening degree.

9. The control method for a heat pump system as described in claim 2, characterized in that, The step of controlling the operation of the outdoor fan corresponding to the outdoor heat exchanger based on the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes: When the outdoor heat exchanger is in a condensing state, and when the first temperature is less than or equal to the second temperature, the outdoor fan is controlled to reduce its speed. When the outdoor heat exchanger is in a condensing state, and when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan is controlled to operate at a speed less than or equal to the current speed. The third temperature is obtained by increasing the second temperature by a preset adjustment value.

10. The control method for a heat pump system as described in claim 2, characterized in that, The step of controlling the operation of the outdoor fan corresponding to the outdoor heat exchanger based on the first temperature and the second temperature to reduce the risk of condensation on the heat dissipation module includes: When the outdoor heat exchanger is in an evaporation state, and when the first temperature is less than or equal to the second temperature, the outdoor fan is controlled to increase its speed. When the outdoor heat exchanger is in an evaporation state, and when the first temperature is greater than the second temperature and the first temperature is less than or equal to the third temperature, the outdoor fan is controlled to operate at a speed greater than or equal to the current speed. The third temperature is obtained by increasing the second temperature by a preset adjustment value.

11. A heat pump system, characterized in that, The heat pump system includes a control device, a refrigerant main line, and refrigerant branch lines connected to the refrigerant main line. The refrigerant main line includes an indoor heat exchanger, a first control valve, a heat dissipation module, a second control valve, and an outdoor heat exchanger. The refrigerant main line also includes a compressor connected to the indoor heat exchanger and the outdoor heat exchanger respectively. The first end of the refrigerant branch line is connected to the exhaust port of the compressor. The heat dissipation module is used to dissipate heat from the heat-generating components. The refrigerant branch line includes a third control valve and an energy storage device. The pipeline between the heat dissipation module and the first control valve is connected to the second end of the refrigerant branch line. The outdoor heat exchanger is equipped with a corresponding outdoor fan. The first control valve, the second control valve, the third control valve, and the outdoor fan are all connected to the control device. The control device includes a memory, a processor, and a control program for the heat pump system stored in the memory and executable on the processor. When the control program for the heat pump system is executed by the processor, it implements the steps of the control method for the heat pump system as described in any one of claims 1 to 10.

12. A storage medium, characterized in that, The storage medium stores a control program for a heat pump system, which, when executed by a processor, implements the steps of the control method for the heat pump system as described in any one of claims 1 to 10.

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