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

Abstract

This invention discloses a control method for a heat pump system, the heat pump system itself, and a storage medium. The heat pump system includes a compressor, an indoor heat exchanger, a first control valve, a throttling device, an outdoor heat exchanger, and a refrigerant branch. The indoor heat exchanger, the first control valve, the throttling device, and the outdoor heat exchanger are connected. The refrigerant branch includes an energy storage device. A first end of the refrigerant branch is connected to the compressor's exhaust port, and a pipe between the first control valve and the throttling device is connected to a second end of the refrigerant branch. The method includes: when the heat pump system operates in a preset energy storage mode in a first state, controlling the first control valve to operate at a target opening degree to store refrigerant in the indoor heat exchanger; wherein, in the first state, the compressor's return port is connected to the outdoor heat exchanger, and the compressor's exhaust port is connected to the indoor heat exchanger. This invention aims to improve the reliability of the heat pump system operating in a standalone energy storage mode.

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 incorporate energy storage devices such as water tanks to store a portion of the refrigerant's energy. Heat pump systems often require energy storage during cooling or heating processes, resulting in a higher refrigerant charge. However, when the heat pump system operates in standalone energy storage mode, all the refrigerant discharged from the compressor flows into the branch containing the energy storage device for heat exchange. Excessive refrigerant circulation can lead to high pressure, insufficient exhaust superheat, and reduced system reliability. Summary of the Invention

[0003] 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, with the aim of improving the reliability of the heat pump system in a standalone energy storage mode.

[0004] To achieve the above objectives, the present invention provides a control method for a heat pump system. The heat pump system includes a compressor, an indoor heat exchanger, a first control valve, a throttling device, an outdoor heat exchanger, and a refrigerant branch. The indoor heat exchanger, the first control valve, the throttling device, and the outdoor heat exchanger are connected together. The refrigerant branch includes an energy storage device. A 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 of the compressor via a reversing assembly. The pipeline between the first control valve and the throttling device is connected to a second end of the refrigerant branch. The control method for the heat pump system includes the following steps:

[0005] When the heat pump system is operating in the preset energy storage mode in the first state, the first control valve is controlled to operate at the target opening degree so that the refrigerant is stored in the indoor heat exchanger.

[0006] In the first state, the compressor's return port is connected to the outdoor heat exchanger, and the compressor's exhaust port is connected to the indoor heat exchanger.

[0007] Optionally, the heat pump system further includes a reversing assembly, wherein the indoor heat exchanger, the compressor's return port, the compressor's exhaust port, and the outdoor heat exchanger are all connected to the reversing assembly. Before the step of controlling the first control valve to operate at a target opening degree to store refrigerant in the indoor heat exchanger when the heat pump system is operating in a preset energy storage mode in the first state, the system further includes:

[0008] When the heat pump system is in a preset mode and the indoor unit where the indoor heat exchanger is located meets the shutdown conditions, the indoor fan corresponding to the indoor heat exchanger is controlled to shut down, the reversing component is controlled to switch the operating state so that the heat pump system enters the first state, and the heat pump system is controlled to start the preset energy storage mode.

[0009] In the preset mode, the indoor heat exchanger is in an evaporation state.

[0010] Optionally, the reversing assembly includes a first four-way valve and a second four-way valve. The exhaust port, the return port, the indoor heat exchanger, and the first sealing element are respectively connected to different ports of the first four-way valve. The pipeline between the return port and the first four-way valve, the exhaust port, the outdoor heat exchanger, and the second sealing element are respectively connected to different ports of the second four-way valve. The step of controlling the reversing assembly to switch operating states to allow the heat pump system to enter the first state includes:

[0011] Control the first four-way valve to switch to the second valve position and control the second four-way valve to switch to the third valve position;

[0012] In the second valve position, the exhaust port is connected to the indoor heat exchanger and the return air port is connected to the first sealing element; in the third valve position, the return air port is connected to the outdoor heat exchanger and the exhaust port is connected to the second sealing element.

[0013] Optionally, the control method for the heat pump system further includes:

[0014] In the preset mode, the first four-way valve is controlled to operate at the first valve position, the second four-way valve is controlled to operate at the fourth valve position, and the first control valve is controlled to operate at the throttling opening.

[0015] In the first valve position, the exhaust port is connected to the first sealing element, and the return air port is connected to the indoor heat exchanger; in the fourth valve position, the second sealing element is connected to the return air port, and the exhaust port is connected to the outdoor heat exchanger.

[0016] Optionally, the heat pump system further includes a heat dissipation module disposed between the first control valve and the throttling device, the heat dissipation module being used to dissipate heat from the heat-generating components, the throttling device including a second control valve, and the pipeline between the heat dissipation module and the first control valve being connected to the second end of the refrigerant branch. The control method of the heat pump system further includes:

[0017] In the preset mode, the second control valve is controlled to operate at an opening greater than the preset opening degree.

[0018] Optionally, the control method for the heat pump system further includes:

[0019] In the preset mode, when the cooling demand of the indoor heat exchanger is greater than or equal to the energy storage demand of the energy storage device, the steps of controlling the first four-way valve to operate at the first valve position, controlling the second four-way valve to operate at the fourth valve position, and controlling the first control valve to operate at the throttling opening are executed.

[0020] Optionally, the throttling device includes a second control valve, and the control method of the heat pump system further includes:

[0021] In the preset mode, the first four-way valve is controlled to operate at the first valve position, the second four-way valve is controlled to operate at the third valve position, and both the first control valve and the second control valve are controlled to operate at the throttling opening.

[0022] In the first valve position, the exhaust port is connected to the first sealing element, and the return air port is connected to the indoor heat exchanger; in the third valve position, the return air port is connected to the outdoor heat exchanger, and the exhaust port is connected to the second sealing element.

[0023] Optionally, the control method for the heat pump system further includes:

[0024] In the preset mode, when the cooling demand of the indoor heat exchanger is less than the energy storage demand of the energy storage device, the steps of controlling the first four-way valve to operate at the first valve position, controlling the second four-way valve to operate at the third valve position, and controlling both the first control valve and the second control valve to operate at the throttling opening are executed.

[0025] Optionally, the refrigerant branch further includes a third control valve, and the control method of the heat pump system further includes:

[0026] In the preset mode or the preset energy storage mode, the third control valve is controlled to operate at an opening greater than the preset opening degree.

[0027] Optionally, after the step of controlling the first control valve to operate at a target opening to store refrigerant in the indoor heat exchanger, the method further includes:

[0028] Obtain the subcooling degree of the indoor heat exchanger;

[0029] When the subcooling degree is greater than the preset subcooling degree, the first control valve is controlled to increase its opening degree;

[0030] When the subcooling degree is less than the preset subcooling degree, the first control valve is controlled to reduce its opening.

[0031] Furthermore, to achieve the above objectives, this application also proposes a heat pump system, which includes a control device, a compressor, an indoor heat exchanger, a first control valve, a throttling device, an outdoor heat exchanger, and a refrigerant branch. The indoor heat exchanger, the first control valve, the throttling device, and the outdoor heat exchanger are connected together. The refrigerant branch includes an energy storage device. 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 of the compressor through a reversing assembly. The pipeline between the first control valve and the throttling device is connected to the second end of the refrigerant branch.

[0032] The first control valve is connected to the control device, which includes a memory, a processor, and a control program for a 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 of the preceding claims.

[0033] 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.

[0034] This invention proposes a control method for a heat pump system. In addition to a compressor, indoor heat exchanger, first control valve, throttling device, and outdoor heat exchanger, the system also includes a refrigerant branch with an energy storage device. One end of the refrigerant branch is connected to the compressor exhaust port, and the pipeline between the first control valve and the throttling device is connected to the other end of the refrigerant branch. When the heat pump system operates in a preset energy storage mode with the compressor return port connected to the outdoor heat exchanger and the compressor exhaust port connected to the indoor heat exchanger, a portion of the refrigerant is stored in the indoor heat exchanger by controlling the first control valve to operate at a target opening. The remaining refrigerant used for energy storage can circulate among the refrigerant branch, throttling device, outdoor heat exchanger, and compressor. This effectively reduces the amount of refrigerant circulating in the preset energy storage mode, effectively avoiding problems such as excessive pressure and insufficient exhaust superheat caused by excessive refrigerant, and improving the reliability of the heat pump system in a standalone energy storage mode. Attached Figure Description

[0035] 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;

[0036] 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;

[0037] Figure 3This 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;

[0038] 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;

[0039] 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;

[0040] 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;

[0041] 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;

[0042] Figure 8 This is a flowchart illustrating an embodiment of the control method for the heat pump system of the present invention;

[0043] Figure 9 This is a schematic flowchart of another embodiment of the control method for the heat pump system of the present invention;

[0044] Figure 10 This is a flowchart illustrating another embodiment of the control method for the heat pump system of the present invention.

[0045] 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

[0046] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0047] This invention provides a heat pump system.

[0048] 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 line, and refrigerant branch lines connected to the refrigerant main line. The refrigerant main line includes an indoor unit, an outdoor heat exchanger 4, and a throttling device. 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 throttling device, and the outdoor heat exchanger 4 are connected in sequence. The refrigerant branch line includes an energy storage device 10 and a third control valve 6. The first end of the refrigerant branch line is connected to the exhaust port of the compressor 1 on the refrigerant main line, and the pipeline between the first control valve 7 and the throttling device is connected to the second end of the refrigerant branch line. The first control valve 7, the throttling device, and the third control valve 6 are all connected to the control device 100.

[0049] In this embodiment, the first control valve 7, the throttling device (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 throttling device and / or the third control valve 6 may also be other types of flow-adjustable fluid components.

[0050] 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. In other embodiments, the energy storage device 10 can also be other types of devices with energy storage functions made of energy storage substances, such as devices containing molten salt. The energy storage device 10 can be a water tank (water heater).

[0051] An outdoor fan 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 and outdoor fans are connected to the control device 100.

[0052] The refrigerant main circuit includes a compressor 1, an indoor unit, a throttling device, and an outdoor heat exchanger 4. 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.

[0053] In this embodiment, the throttling device includes a second control valve 8. In other embodiments, the throttling device may also be a throttling component with a non-adjustable opening, such as a capillary tube.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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:

[0060] Reference Figure 1 In the first mode, the indoor unit is in cooling 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 first control valve 7 and / or the second control valve 8 operate in throttling mode, 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 refrigerant main circuit flows sequentially through the outdoor heat exchanger 4, the second control valve 8, 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 refrigerant main circuit can flow through the refrigerant branch circuit and store energy in the energy storage device 10. In the first mode, the indoor heat exchanger 9 is in evaporation mode, and the outdoor heat exchanger 4 is in condensation mode.

[0061] Reference Figure 2In the second 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 third control valve 6 are open, the first control valve 7 and the second control valve 8 operate in throttling mode, the first four-way valve 2 operates in the first valve position, the second four-way valve 3 operates in 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 by 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 second control valve 8 and the outdoor heat exchanger 4 and then flows back to the compressor 1. In the second mode, the indoor heat exchanger 9 is in evaporation mode, and the outdoor heat exchanger 4 is in evaporation mode.

[0062] Reference Figure 3 In the third 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 is closed or operates at its minimum opening, the second control valve 8 is open, the first four-way valve 2 operates at the first valve position, the second four-way valve 3 operates at 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 refrigerant main circuit flows sequentially through the outdoor heat exchanger 4, the second control valve 8, the first control valve 7, and the indoor heat exchanger 9 before returning to the compressor 1, during which the energy storage device 10 stops storing energy. In the third mode, the indoor heat exchanger 9 is in an evaporating state, and the outdoor heat exchanger 4 is in a condensing state.

[0063] Reference Figure 4 In the fourth 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 is open, 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 second control valve 8, and the outdoor heat exchanger 4 before returning to the compressor 1. In the fourth mode, the outdoor heat exchanger 4 is in an evaporation state.

[0064] Reference Figure 5In the fifth 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 first control valve 7 and / or the second control valve 8 operate in throttling mode, 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 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 fifth mode, the indoor heat exchanger 9 is in condensation mode, and the outdoor heat exchanger 4 is in evaporation mode.

[0065] Reference Figure 6 In the sixth 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 is closed or operating at its minimum opening, the first control valve 7 and / or the second control valve 8 operate at a throttling rate, the first four-way valve 2 operates at its second position, the second four-way valve 3 operates at its third 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 discharged from the compressor 1 flows sequentially through the indoor heat exchanger 9, the first control valve 7, the second control valve 8, and the outdoor heat exchanger 4 before returning to the compressor 1, during which the energy storage device 10 stops storing energy. 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.

[0066] 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.

[0067] 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.

[0068] Furthermore, in this embodiment, referring to Figures 1 to 6 The heat pump system further includes a heat dissipation module 5 disposed between the first control valve 7 and the throttling device. The heat dissipation module 5 is used to dissipate heat from the heat-generating components. The throttling device includes a second control valve 8. The pipeline between the heat dissipation module 5 and the first control valve 7 is connected to the second end of the refrigerant branch.

[0069] Furthermore, refer to Figure 7The heat pump system also includes a temperature sensor 01 located on the indoor unit for detecting the indoor ambient temperature. The temperature sensor 01 is connected to the control device 100. Specifically, the temperature sensor 01 can be located on the return air vent of the indoor unit that communicates with the corresponding indoor space.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] This invention also provides a control method for a heat pump system, applied to the aforementioned heat pump system.

[0075] Reference Figure 8 This 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:

[0076] Step S10: When the heat pump system is running in the preset energy storage mode in the first state, the first control valve is controlled to operate at the target opening degree so that the refrigerant is stored in the indoor heat exchanger; wherein, in the first state, the return port of the compressor is connected to the outdoor heat exchanger and the exhaust port of the compressor is connected to the indoor heat exchanger.

[0077] In the first state, the indoor heat exchanger is in a heat-releasing state, and the outdoor heat exchanger is in a heat-absorbing state.

[0078] In this embodiment, the heat pump system is a system where the heat exchanger's heat exchange state is switchable. Based on this, the heat pump system can be in a first state through the operation control of the reversing assembly. In one implementation of this embodiment, the reversing assembly includes the aforementioned first four-way valve and second four-way valve. The first four-way valve operates in a second valve position, and the second four-way valve operates in a third valve position to keep the heat pump system in the first state. In another implementation of this embodiment, the reversing assembly includes a third four-way valve, and controlling the third four-way valve to operate in a fifth valve position keeps the heat pump system in the first state.

[0079] In other embodiments, the heat pump system is a system where the heat exchanger's heat exchange state cannot be switched. Based on this, the compressor's exhaust port, indoor heat exchanger, throttling device, outdoor heat exchanger, and compressor's return port are connected sequentially in the heat pump system, and the heat pump system is fixed in a first state.

[0080] In this embodiment, the preset energy storage mode is a standalone energy storage mode. In this mode, the indoor heat exchanger has no heat exchange requirement, but the energy storage device does. The indoor fan in the indoor unit is off in the preset energy storage mode. In this mode, if a refrigerant valve is installed on the refrigerant branch, the relevant refrigerant valve can be controlled to open. In this embodiment, the refrigerant valve on the refrigerant branch is opened to its maximum degree in the preset energy storage mode.

[0081] The target opening degree is any opening degree greater than 0 that allows refrigerant to be stored in the indoor heat exchanger. The target opening degree can be less than or equal to 30% of the maximum opening degree of the first control valve. In this embodiment, the target opening degree is the minimum opening degree of the first control valve.

[0082] The target opening degree can be a pre-set fixed opening degree, such as 50 steps. Alternatively, the target opening degree can be an opening value determined based on the actual operating conditions of the heat pump system. For example, the target opening degree can be determined based on the subcooling degree of the indoor heat exchanger and / or the temperature of the energy storage device and / or the operating frequency of the compressor and / or the temperature difference between the temperature of the energy storage device and the corresponding set temperature and / or the speed of the outdoor fan, etc.

[0083] When the heat pump system is in its first state, a portion of the refrigerant discharged from the compressor flows into the refrigerant branch to provide heat for the energy storage device. After passing through the energy storage device, the refrigerant flows sequentially through the throttling device and the outdoor heat exchanger before returning to the compressor. Another portion of the refrigerant discharged from the compressor flows into the indoor heat exchanger. Due to the limitation of the target opening of the first control valve, only a small portion of the refrigerant flows out of the first control valve, keeping the indoor heat exchanger under high pressure. This allows for the storage of the remaining refrigerant within the indoor heat exchanger. Based on this, the high pressure of the system can be relieved and diverted, reducing the amount of refrigerant participating in the circulation, effectively lowering the high pressure and increasing the exhaust superheat, thereby improving system reliability. It should be noted that when the first control valve is closed, because the indoor heat exchanger itself is sealed with refrigerant, the refrigerant discharged from the compressor will not flow into the indoor heat exchanger but will instead flow entirely through the refrigerant branch.

[0084] When the throttling device includes a second control valve, in the preset energy storage mode, the first control valve is controlled to operate at the target opening degree while the second control valve is controlled to operate at the throttling opening degree.

[0085] This invention proposes a control method for a heat pump system. In addition to a compressor, indoor heat exchanger, first control valve, throttling device, and outdoor heat exchanger, the system also includes a refrigerant branch with an energy storage device. One end of the refrigerant branch is connected to the compressor exhaust port, and the pipeline between the first control valve and the throttling device is connected to the other end of the refrigerant branch. When the heat pump system operates in a preset energy storage mode with the compressor return port connected to the outdoor heat exchanger and the compressor exhaust port connected to the indoor heat exchanger, a portion of the refrigerant is stored in the indoor heat exchanger by controlling the first control valve to operate at a target opening. The remaining refrigerant used for energy storage can circulate among the refrigerant branch, throttling device, outdoor heat exchanger, and compressor. This effectively reduces the amount of refrigerant circulating in the preset energy storage mode, effectively avoiding problems such as excessive pressure and insufficient exhaust superheat caused by excessive refrigerant, and improving the reliability of the heat pump system in a standalone energy storage mode.

[0086] 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 heat pump system further includes a reversing assembly, and the indoor heat exchanger, the return port of the compressor, the exhaust port of the compressor, and the outdoor heat exchanger are all connected to the reversing assembly, as described above. Figure 9 Before step S10, the procedure further includes:

[0087] Step S01: When the heat pump system is in a preset mode and the indoor unit where the indoor heat exchanger is located meets the shutdown conditions, control the indoor fan corresponding to the indoor heat exchanger to shut down, control the reversing component to switch the operating state so that the heat pump system enters the first state, and control the heat pump system to start the preset energy storage mode; wherein, in the preset mode, the indoor heat exchanger is in the evaporation state.

[0088] The indoor environment corresponding to the indoor unit in the preset mode has heat exchange requirements. The preset mode may include the first mode, the second mode, or the third mode mentioned above.

[0089] In this embodiment, the preset mode is cooling mode, where the indoor heat exchanger is in an evaporating state to lower the indoor ambient temperature. In other embodiments, the preset mode may also be another mode in which the indoor heat exchanger is in an evaporating state, such as dehumidification mode.

[0090] In this embodiment, when the heat pump system is in a preset mode, the corresponding indoor ambient temperature can be detected. When the indoor ambient temperature is less than or equal to the set temperature of the indoor unit, it can be determined that the shutdown condition is met. In other embodiments, when the heat pump system is in a preset mode, the corresponding indoor ambient humidity can be detected. When the indoor ambient humidity is less than or equal to the set humidity of the indoor unit, it can be determined that the shutdown condition is met.

[0091] In this embodiment, the control device is located in the outdoor unit, so it can send a preset identification command to the indoor unit, so that the indoor unit can control the indoor fan to shut down after receiving the preset identification command.

[0092] In this embodiment, the energy storage device is in energy storage mode within the preset mode. A portion of the refrigerant discharged from the compressor flows through the outdoor heat exchanger, the throttling device, and the indoor heat exchanger before returning to the compressor. The other portion of the refrigerant discharged from the compressor flows through the energy storage device, the indoor heat exchanger, or the outdoor heat exchanger before returning to the compressor. In other embodiments, the energy storage device may also be in a stopped energy storage mode within the preset mode. In this case, the refrigerant discharged from the compressor stops flowing into the refrigerant branch and instead circulates and exchanges heat entirely in the main refrigerant line.

[0093] When the indoor unit reaches the shutdown condition, the indoor fan is turned off to stop the heat exchange between the indoor air and the indoor heat exchanger. Based on this, the reversing component switches the indoor heat exchanger from a low-pressure state to a high-pressure state, and the preset energy storage mode is activated, causing the first control valve to operate at the target opening degree. This allows excess refrigerant circulating in the heat pump system to be stored in the high-pressure indoor unit when it is only used for energy storage and not for indoor heat exchange. Since the indoor fan is turned off, hot air is prevented from entering the indoor environment and affecting comfort, thus improving the system's operational reliability in the standalone energy storage mode while ensuring indoor comfort.

[0094] Furthermore, in this embodiment, the reversing assembly includes a first four-way valve and a second four-way valve. The exhaust port, the return port, the indoor heat exchanger, and the first sealing element are respectively connected to different valve ports of the first four-way valve. The pipeline between the return port and the first four-way valve, the exhaust port, the outdoor heat exchanger, and the second sealing element are respectively connected to different valve ports of the second four-way valve. The step of controlling the reversing assembly to switch operating states to enable the heat pump system to enter the first state includes:

[0095] The first four-way valve is controlled to switch to the second valve position, and the second four-way valve is controlled to switch to the third valve position. In the second valve position, the exhaust port is connected to the indoor heat exchanger and the return air port is connected to the first sealing component. In the third valve position, the return air port is connected to the outdoor heat exchanger and the exhaust port is connected to the second sealing component.

[0096] With the valve positions of the first four-way valve and the second four-way valve in coordination, a portion of the refrigerant flowing out of the compressor flows sequentially through the refrigerant branch, the second control valve, and the outdoor heat exchanger before returning to the compressor. Energy is stored in the energy storage device as the refrigerant flows through the refrigerant branch. Another portion of the refrigerant flowing out of the compressor flows into the indoor heat exchanger. A large amount of refrigerant is stored in the indoor heat exchanger under the flow-limiting effect of the first control valve operating at the target opening degree. A small amount of refrigerant flows out of the first control valve and merges with the refrigerant flowing out of the refrigerant branch, then flows through the second control valve and the outdoor heat exchanger before returning to the compressor.

[0097] In this embodiment, by cooperating with the first four-way valve and the second four-way valve, the heat pump system can store energy in the energy storage device independently when there is no heat exchange requirement indoors, thereby effectively improving the energy utilization rate of the heat pump system.

[0098] Furthermore, in one implementation of the preset mode in this embodiment, the control method of the heat pump system further includes: in the preset mode, controlling the first four-way valve to operate in the first valve position, controlling the second four-way valve to operate in the fourth valve position, and controlling the first control valve to operate at a throttling opening; in the first valve position, the exhaust port is connected to the first sealing member, and the return air port is connected to the indoor heat exchanger; in the fourth valve position, the second sealing member is connected to the return air port, and the exhaust port is connected to the outdoor heat exchanger.

[0099] In this embodiment, the preset mode includes the first mode described above, in which the refrigerant discharged from the compressor in the main refrigerant circuit flows sequentially through the outdoor heat exchanger, the second control valve, the first control valve, and the indoor heat exchanger before returning to the compressor. Specifically, when the refrigerant branch circuit is in a conductive state, 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.

[0100] In the first mode, the indoor heat exchanger is in an evaporating state to absorb heat, the outdoor heat exchanger is in a condensing state to release heat, 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.

[0101] In this embodiment, by cooperating with the first four-way valve and the second four-way valve, the cooling needs of the indoor environment are met while a small amount of heat is stored in the energy storage device.

[0102] Furthermore, in this embodiment, the heat pump system further includes a heat dissipation module disposed between the first control valve and the throttling device. The heat dissipation module is used to dissipate heat from the heat-generating components. The throttling device includes a second control valve. The pipeline between the heat dissipation module and the first control valve is connected to the second end of the refrigerant branch. The control method of the heat pump system further includes: in the preset mode, controlling the second control valve to operate at an opening greater than a preset opening degree.

[0103] The preset opening degree can be 70% of the maximum opening degree of the second control valve.

[0104] In this embodiment, the second control valve is controlled to operate at its maximum opening. In other embodiments, the second control valve may also operate at an opening smaller than the maximum opening but larger than a preset opening.

[0105] Specifically, the opening degree of the second control valve can be determined based on the temperature of the heat dissipation module and the dew point temperature of the environment where the heat dissipation module is located.

[0106] In this embodiment, the second control valve operates at a large opening, which can effectively prevent the refrigerant flowing into the heat dissipation module from being too cold, thereby effectively preventing condensation on the heat dissipation module.

[0107] In other embodiments, when no heat dissipation module is provided, the second control valve can also operate at a throttling opening, that is, at an opening less than or equal to the preset opening.

[0108] Furthermore, in another implementation of the preset mode in this embodiment, the throttling device includes a second control valve, and the control method of the heat pump system further includes: in the preset mode, controlling the first four-way valve to operate at a first valve position, controlling the second four-way valve to operate at a third valve position, and controlling both the first control valve and the second control valve to operate at a throttling opening; in the first valve position, the exhaust port is connected to the first sealing element, and the return air port is connected to the indoor heat exchanger; in the third valve position, the return air port is connected to the outdoor heat exchanger, and the exhaust port is connected to the second sealing element.

[0109] In this embodiment, the preset mode includes the second mode described above. The refrigerant discharged from the compressor first flows into the refrigerant branch and stores its 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 second control valve and the outdoor heat exchanger before returning to the compressor. In this configuration, the refrigerant branch is in a conductive state, allowing all the refrigerant discharged from the compressor to flow into the refrigerant branch and store its energy in the energy storage device.

[0110] In the second mode, both the indoor and outdoor heat exchangers are in an evaporative state to absorb heat, and the heat pump system is in a state of full heat recovery. The heat from the indoor and outdoor environments can be absorbed into the system through the indoor and outdoor heat exchangers, respectively, and the excess heat in the refrigerant can be stored in the energy storage device.

[0111] In this embodiment, the cooperation of the first four-way valve and the second four-way valve enables the storage of a large amount of heat in the energy storage device while meeting the cooling needs of the indoor environment.

[0112] Furthermore, in another implementation of the preset mode in this embodiment, the control method of the heat pump system further includes: in the preset mode, obtaining the demand status of the heat pump system; 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, executing the steps of controlling the first four-way valve to operate at the first valve position, controlling the second four-way valve to operate at the fourth valve position, and controlling the first control valve to operate at a throttling opening; 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, executing the steps of controlling the first four-way valve to operate at the first valve position, controlling the second four-way valve to operate at the third valve position, and controlling both the first control valve and the second control valve to operate at a throttling opening.

[0113] 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.

[0114] 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.

[0115] 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 refrigerant branch further includes a third control valve, and the control method for the air conditioner further includes: in the preset mode or the preset energy storage mode, controlling the third control valve to operate at an opening greater than a preset opening degree.

[0116] The preset opening degree can be 70% of the maximum opening degree of the second control valve.

[0117] In this embodiment, the third control valve is controlled to operate at its maximum opening. In other embodiments, the third control valve may also operate at an opening smaller than the maximum opening but larger than the preset opening.

[0118] The operating opening degree of the third control valve can be a preset fixed opening degree, or it can be determined according to the actual operating conditions of the heat pump system. For example, in the preset mode, the energy demand value of the indoor unit can be obtained, and the opening degree of the third control valve to be opened can be determined based on the energy demand value, so as to ensure indoor comfort while storing energy. As another example, in the preset energy storage mode, the exhaust pressure and / or exhaust superheat can be obtained, and the opening degree of the third control valve to be opened can be determined based on the exhaust pressure and / or exhaust superheat and / or the target opening degree of the first control valve, so as to further improve the reliability of the heat pump system.

[0119] In this embodiment, the third control valve operates at an opening greater than the preset opening degree in the preset mode, which helps ensure that the energy storage device can store energy while providing cooling. The third control valve operating at an opening greater than the preset opening degree in the preset energy storage mode helps improve energy storage efficiency.

[0120] 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, reference is made to... Figure 10 After step S10, the method further includes:

[0121] Step S20: Obtain the subcooling degree of the indoor heat exchanger;

[0122] Subcooling is specifically the temperature difference between the saturation temperature corresponding to the condensing pressure of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger. Based on this, the subcooling can be calculated by detecting the condensing pressure and outlet temperature of the indoor heat exchanger.

[0123] Step S30: When the subcooling degree is greater than the preset subcooling degree, control the first control valve to increase its opening degree;

[0124] Step S40: When the subcooling degree is less than the preset subcooling degree, control the first control valve to reduce its opening degree.

[0125] The opening degree of the first control valve can be reduced or increased by adjusting the current opening degree of the first control valve according to a preset fixed adjustment value; or the current opening degree of the first control valve can be adjusted according to the opening degree adjustment value determined by the actual operation of the heat pump system. For example, the opening degree adjustment value can be determined according to the temperature difference between the temperature of the energy storage device and the target energy storage temperature, etc.

[0126] In this embodiment, the subcooling of the indoor heat exchanger can accurately reflect whether the amount of refrigerant currently stored in the indoor heat exchanger is appropriate. When the subcooling is greater than the preset subcooling, it indicates that the amount of refrigerant stored in the indoor heat exchanger is too large. At this time, the opening of the first control valve is increased, thereby increasing the amount of refrigerant participating in the circulation of the heat pump system and effectively improving the energy storage efficiency of the energy storage device. When the subcooling is less than the preset subcooling, it indicates that the amount of refrigerant stored in the indoor heat exchanger is insufficient, and there is a risk of insufficient system reliability. At this time, the opening of the first control valve is decreased, further reducing the amount of refrigerant participating in the circulation of the heat pump system, thereby further improving the system reliability.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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 reversing assembly, a compressor, an indoor heat exchanger, a first control valve, a throttling device, an outdoor heat exchanger, and a refrigerant branch. The indoor heat exchanger, the first control valve, the throttling device, and the outdoor heat exchanger are connected together. The indoor heat exchanger, the compressor's return port, the compressor's discharge port, and the outdoor heat exchanger are all connected to the reversing assembly. The refrigerant branch includes an energy storage device. The first end of the refrigerant branch is connected to the compressor's discharge port. The pipeline between the first control valve and the throttling device is connected to the second end of the refrigerant branch. The control method of the heat pump system includes the following steps: When the heat pump system is in a preset mode and the indoor unit where the indoor heat exchanger is located meets the shutdown conditions, the indoor fan corresponding to the indoor heat exchanger is controlled to shut down, the reversing component is controlled to switch the operating state so that the heat pump system enters the first state, and the heat pump system is controlled to start the preset energy storage mode. When the heat pump system is operating in the preset energy storage mode in the first state, the first control valve is controlled to operate at the target opening degree so that the refrigerant is stored in the indoor heat exchanger. In the first state, the compressor's return port is connected to the outdoor heat exchanger, and the compressor's exhaust port is connected to the indoor heat exchanger. In the preset mode, the indoor heat exchanger is in an evaporation state.

2. The control method for a heat pump system as described in claim 1, characterized in that, The reversing assembly includes a first four-way valve and a second four-way valve. The exhaust port, the return port, the indoor heat exchanger, and the first sealing element are respectively connected to different valve ports of the first four-way valve. The pipeline between the return port and the first four-way valve, the exhaust port, the outdoor heat exchanger, and the second sealing element are respectively connected to different valve ports of the second four-way valve. The step of controlling the reversing assembly to switch operating states to enable the heat pump system to enter the first state includes: Control the first four-way valve to switch to the second valve position and control the second four-way valve to switch to the third valve position; In the second valve position, the exhaust port is connected to the indoor heat exchanger and the return air port is connected to the first sealing element; in the third valve position, the return air port is connected to the outdoor heat exchanger and the exhaust port is connected to the second sealing element.

3. The control method for a heat pump system as described in claim 2, characterized in that, The control method for the heat pump system also includes: In the preset mode, the first four-way valve is controlled to operate at the first valve position, the second four-way valve is controlled to operate at the fourth valve position, and the first control valve is controlled to operate at the throttling opening. In the first valve position, the exhaust port is connected to the first sealing element, and the return air port is connected to the indoor heat exchanger; in the fourth valve position, the second sealing element is connected to the return air port, and the exhaust port is connected to the outdoor heat exchanger.

4. The control method for a heat pump system as described in claim 3, characterized in that, The heat pump system further includes a heat dissipation module disposed between the first control valve and the throttling device, the heat dissipation module being used to dissipate heat from the heat-generating components, the throttling device including a second control valve, and the pipeline between the heat dissipation module and the first control valve being connected to the second end of the refrigerant branch. The control method of the heat pump system further includes: In the preset mode, the second control valve is controlled to operate at an opening greater than the preset opening degree.

5. The control method for a heat pump system as described in claim 3, characterized in that, The control method for the heat pump system also includes: In the preset mode, when the cooling demand of the indoor heat exchanger is greater than or equal to the energy storage demand of the energy storage device, the steps of controlling the first four-way valve to operate at the first valve position, controlling the second four-way valve to operate at the fourth valve position, and controlling the first control valve to operate at the throttling opening are executed.

6. The control method for a heat pump system as described in claim 2, characterized in that, The throttling device includes a second control valve, and the control method for the heat pump system further includes: In the preset mode, the first four-way valve is controlled to operate at the first valve position, the second four-way valve is controlled to operate at the third valve position, and both the first control valve and the second control valve are controlled to operate at the throttling opening. In the first valve position, the exhaust port is connected to the first sealing element, and the return air port is connected to the indoor heat exchanger; in the third valve position, the return air port is connected to the outdoor heat exchanger, and the exhaust port is connected to the second sealing element.

7. The control method for a heat pump system as described in claim 6, characterized in that, The control method for the heat pump system also includes: In the preset mode, when the cooling demand of the indoor heat exchanger is less than the energy storage demand of the energy storage device, the steps of controlling the first four-way valve to operate at the first valve position, controlling the second four-way valve to operate at the third valve position, and controlling both the first control valve and the second control valve to operate at the throttling opening are executed.

8. The control method for a heat pump system as described in any one of claims 1 to 7, characterized in that, The refrigerant branch also includes a third control valve, and the control method of the heat pump system further includes: In the preset mode or the preset energy storage mode, the third control valve is controlled to operate at an opening greater than the preset opening degree.

9. The control method for a heat pump system as described in any one of claims 1 to 7, characterized in that, After the step of controlling the first control valve to operate at a target opening to store refrigerant in the indoor heat exchanger, the method further includes: Obtain the subcooling degree of the indoor heat exchanger; When the subcooling degree is greater than the preset subcooling degree, the first control valve is controlled to increase its opening degree; When the subcooling degree is less than the preset subcooling degree, the first control valve is controlled to reduce its opening.

10. A heat pump system, characterized in that, The heat pump system includes a control device, a reversing assembly, a compressor, an indoor heat exchanger, a first control valve, a throttling device, an outdoor heat exchanger, and a refrigerant branch. The indoor heat exchanger, the first control valve, the throttling device, and the outdoor heat exchanger are connected together. The refrigerant branch includes an energy storage device. The first end of the refrigerant branch is connected to the exhaust port of the compressor. The indoor heat exchanger, the return port of the compressor, the exhaust port of the compressor, and the outdoor heat exchanger are all connected to the reversing assembly. The pipeline between the first control valve and the throttling device is connected to the second end of the refrigerant branch. The first control valve is connected to the control device, which includes a memory, a processor, and a control program for a 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 9.

11. 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 a heat pump system as described in any one of claims 1 to 9.

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