Control method for heat pump system, heat pump system, and storage medium

Abstract

The application discloses a kind of control method of heat pump system, heat pump system and storage medium.Therein, the heat pump system includes refrigerant main road and refrigerant branch connected with the refrigerant main road, the refrigerant main road includes more than one indoor unit and outdoor unit, and the refrigerant branch includes energy storage device, and the method includes: obtaining the operating state of each indoor unit and the energy demand state corresponding to the energy storage device, the operating state includes whether the corresponding indoor unit is opened heat exchange mode, and the energy demand state includes whether the energy storage device has energy demand;According to more than one operating state and the energy demand state, determine the target operating mode of the outdoor unit;According to the target operating mode, control the outdoor unit to operate.The application aims to improve the flexibility of outdoor unit operation to meet different indoor use requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump systems, in particular to a control method of a heat pump system, a heat pump system and a storage medium. BACKGROUND

[0002] In addition to adjusting indoor ambient air, the heat pump system can also be provided with an energy storage device to meet other energy demands. In a multi-split heat pump system, the operating conditions are complex, and different operating conditions require different use of the heat pump system. It is difficult for the outdoor unit to meet different use requirements in a fixed mode. SUMMARY

[0003] The main purpose of the present application is to provide a control method of a heat pump system, a heat pump system and a storage medium, which aims to improve the flexibility of outdoor unit operation to meet different indoor use requirements.

[0004] To achieve the above purpose, the present application provides a control method of a heat pump system, the heat pump system comprising a refrigerant main circuit and a refrigerant branch circuit connected to the refrigerant main circuit, the refrigerant main circuit comprising more than one indoor unit and an outdoor unit, the refrigerant branch circuit comprising an energy storage device, the control method of the heat pump system comprising the following steps:

[0005] Obtain the operating state of each indoor unit and the energy demand state corresponding to the energy storage device, the operating state comprising whether the corresponding indoor unit is in heat exchange mode, and the energy demand state comprising whether the energy storage device has energy demand;

[0006] Determine the target operating mode of the outdoor unit according to more than one operating state and energy demand state;

[0007] Control the outdoor unit to operate according to the target operating mode.

[0008] Optionally, the step of determining the target operating mode of the outdoor unit according to more than one operating state and energy demand state comprises:

[0009] When at least one indoor unit is in the heat exchange mode and the energy storage device has energy demand, determine a first operating mode as the target operating mode, so that the opened indoor unit is in the target heat exchange state corresponding to the heat exchange mode and the energy storage device is in the target energy storage state corresponding to the energy demand;

[0010] When at least one indoor unit is in the heat exchange mode and the energy storage device does not have energy demand, determine a second operating mode as the target operating mode, so that the opened indoor unit is in the target heat exchange state corresponding to the heat exchange mode and the energy storage device is in the stop energy storage state;

[0011] determining a third operation mode as the target operation mode when all the indoor units do not open the heat exchange mode and the energy storage device has energy demand, to stop the heat exchange of the indoor units and the energy storage device in the target energy storage state;

[0012] determining a fourth operation mode as the target operation mode when all the indoor units do not open the heat exchange mode and the energy storage device has no energy demand, to make the outdoor unit stop running.

[0013] Optionally, the heat exchange mode includes a cooling mode or a heating mode, and the step of determining the first operation mode as the target operation mode when at least one of the indoor units opens the heat exchange mode and the energy storage device has energy demand includes:

[0014] determining the first operation mode as the target operation mode according to the priority of the cooling mode and the heating mode when at least one of the indoor units opens the cooling mode, at least one of the indoor units opens the heating mode, and the energy storage device has energy demand.

[0015] Optionally, the heat exchange mode includes a cooling mode or a heating mode, and the step of determining the second operation mode as the target operation mode when at least one of the indoor units opens the heat exchange mode and the energy storage device has no energy demand includes:

[0016] determining the second operation mode as the target operation mode according to the priority of the cooling mode and the heating mode when at least one of the indoor units opens the cooling mode, at least one of the indoor units opens the heating mode, and the energy storage device has no energy demand.

[0017] Optionally, the step of controlling the outdoor unit to run in the target operation mode further includes:

[0018] controlling the outdoor unit to run in the third operation mode when the target operation mode is the first operation mode and the indoor unit opening the heat exchange mode reaches temperature stop;

[0019] controlling the outdoor unit to run in the second operation mode when the target operation mode is the first operation mode and the energy storage temperature of the energy storage device reaches the set energy storage temperature.

[0020] Optionally, the target heat exchange state includes a heating state, the target energy storage state includes a heat storage state, the first operation mode includes a first sub-mode and a second sub-mode, and the step of controlling the outdoor unit to run in the target operation mode includes:

[0021] monitoring a storage energy temperature of the storage energy device continuously when the target operation mode is the first operation mode;

[0022] controlling the outdoor unit to operate in a first sub-mode when the storage energy temperature is less than a first preset temperature, so that the storage energy device is in a heat storage state and the indoor unit stops indoor heat exchange;

[0023] controlling the outdoor unit to operate in a second sub-mode when the storage energy temperature is greater than a second preset temperature, so that the storage energy device is in a heat storage state and the indoor unit is in a heating state;

[0024] controlling the outdoor unit to maintain a current state when the storage energy temperature is greater than or equal to the first preset temperature and the storage energy temperature is less than or equal to the second preset temperature.

[0025] Optionally, the control method of the heat pump system further comprises:

[0026] controlling the indoor unit in the heat exchange mode to output prompt information to prompt a conflict between the operation of the indoor unit and the operation of the outdoor unit when the target operation mode is the first operation mode and the outdoor unit operates in the first sub-mode.

[0027] Optionally, the control method of the heat pump system further comprises:

[0028] controlling the compressor of the outdoor unit to maintain on or off according to the state of the indoor unit and / or the state of the storage energy device corresponding to the first target mode and the second target mode when the outdoor unit needs to switch to the second target mode during operation of the first target mode;

[0029] controlling the outdoor unit to switch to the second target mode;

[0030] wherein one of the first target mode and the second target mode is the target operation mode.

[0031] Optionally, the step of controlling the compressor of the outdoor unit to maintain on or off according to the state of the indoor unit and / or the state of the storage energy device corresponding to the first target mode and the second target mode comprises:

[0032] controlling the compressor of the outdoor unit to be off when the target heat exchange state of the indoor unit corresponding to the first target mode and the second target mode is opposite;

[0033] when the energy storage device corresponding to one of the first target mode and the second target mode is in the heat storage state and the indoor unit corresponding to the other of the first target mode and the second target mode is in the heating state, controlling the compressor of the outdoor unit to stop running;

[0034] when the target heat exchange states of the indoor units corresponding to the first target mode and the second target mode are the same, controlling the compressor of the outdoor unit to maintain running;

[0035] when the energy storage device corresponding to one of the first target mode and the second target mode is in the heat storage state and the indoor unit corresponding to the other of the first target mode and the second target mode is in the heating state, controlling the compressor of the outdoor unit to maintain running.

[0036] In addition, in order to achieve the above-mentioned purpose, the application further provides a heat pump system, which comprises a control device, a refrigerant main circuit and a refrigerant branch circuit connected with the refrigerant main circuit, the refrigerant main circuit comprises more than one indoor unit and an outdoor unit, and the refrigerant branch circuit comprises an energy storage device.

[0037] The indoor unit and the outdoor unit are connected with the control device, and the control device comprises a memory, a processor and a control program of the heat pump system stored in the memory and capable of running on the processor, and the control program of the heat pump system realizes the steps of the control method of the heat pump system according to any one of the above-mentioned embodiments when executed by the processor.

[0038] In addition, in order to achieve the above-mentioned purpose, the application further provides a storage medium, which stores a control program of a heat pump system, and the control program of the heat pump system realizes the steps of the control method of the heat pump system according to any one of the above-mentioned embodiments when executed by a processor.

[0039] The control method of the heat pump system provided by the application is suitable for determining a target running mode according to whether each indoor unit is in a heat exchange mode and whether the energy storage device has energy, so as to control the outdoor unit to run in a mode which is no longer fixed, thereby effectively meeting the indoor heat exchange demand of different indoor spaces and the use demand of the energy storage device, improving the flexibility of the outdoor unit running, and meeting different use demands. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 Fig. 1 is a refrigerant pipeline structure schematic diagram of an embodiment of the heat pump system and a refrigerant flow direction schematic diagram in a first mode;

[0041] Figure 2Fig. 1 is a schematic diagram of a refrigerant pipeline structure of an embodiment of the heat pump system of the present application and a schematic diagram of refrigerant flow in a first mode;

[0042] Figure 3 Fig. 2 is a schematic diagram of a refrigerant pipeline structure of an embodiment of the heat pump system of the present application and a schematic diagram of refrigerant flow in a second mode;

[0043] Figure 4 Fig. 3 is a schematic diagram of a refrigerant pipeline structure of an embodiment of the heat pump system of the present application and a schematic diagram of refrigerant flow in a third mode;

[0044] Figure 5 Fig. 4 is a schematic diagram of a refrigerant pipeline structure of an embodiment of the heat pump system of the present application and a schematic diagram of refrigerant flow in a fourth mode;

[0045] Figure 6 Fig. 5 is a schematic diagram of a refrigerant pipeline structure of an embodiment of the heat pump system of the present application and a schematic diagram of refrigerant flow in a fifth mode;

[0046] Figure 7 Fig. 6 is a schematic diagram of a refrigerant pipeline structure of an embodiment of the heat pump system of the present application and a schematic diagram of refrigerant flow in a sixth mode;

[0047] Figure 8 Fig. 7 is a flowchart of an embodiment of the control method of the heat pump system of the present application;

[0048] Figure 9 Fig. 8 is a flowchart of another embodiment of the control method of the heat pump system of the present application;

[0049] Figure 10 Fig. 9 is a flowchart of still another embodiment of the control method of the heat pump system of the present application;

[0050] Figure 11 Fig. 10 is a flowchart of yet another embodiment of the control method of the heat pump system of the present application;

[0051] Figure 12 Fig. 11 is a flowchart of still another optional embodiment of the control method of the heat pump system of the present application.

[0052] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are merely illustrative of the present application and do not limit the present application.

[0054] An embodiment of the present application provides a heat pump system.

[0055] In the embodiment of the present application, reference is made to Figures 1 to 7The heat pump system comprises a control device 100, a main refrigerant circuit and a branch refrigerant circuit. The main refrigerant circuit comprises a compressor 1, an indoor unit, an outdoor heat exchanger 3, a throttling device 4 and a switching assembly 5. The branch refrigerant circuit comprises an energy storage device 7 and a first control valve 8. The indoor unit, the switching assembly 5, the compressor 1, the throttling device 4 and the first control valve 8 are connected to the control device 100. The heat pump system further comprises an outdoor unit, which comprises the outdoor heat exchanger 3, the throttling device 4, the switching assembly 5 and the first control valve 8. The throttling device 4 and the first control valve 8 can be electronic expansion valves.

[0056] In the embodiment, the energy storage device 7 comprises a water tank. In other embodiments, the energy storage device 7 can also comprise other types of devices with energy storage functions. When the refrigerant in the branch refrigerant circuit flows through the energy storage device 7, the refrigerant can exchange heat with the energy storage material in the energy storage device 7, and the energy storage material can absorb and store the energy of the flowing refrigerant.

[0057] In the embodiment, one end of the branch refrigerant circuit is connected to the exhaust port of the compressor 1, and the pipeline between the indoor unit and the outdoor heat exchanger 3 is connected to the other end of the branch refrigerant circuit. Specifically, the pipeline between the throttling device 4 and the indoor unit is connected to the other end of the branch refrigerant circuit.

[0058] In other embodiments, the heat pump system can further comprise a flow direction adjusting member. The pipeline between the indoor unit and the outdoor heat exchanger 3 is connected to the second end of the branch refrigerant circuit. The gas inlet of the compressor 1, the exhaust port of the compressor 1 and the first end of the branch refrigerant circuit are connected to the flow direction adjusting member. The branch refrigerant circuit switches between the state of being connected to the gas inlet of the compressor 1 and the state of being connected to the exhaust port of the compressor 1 through the flow direction adjusting member. One end of the branch refrigerant circuit is connected to the exhaust port of the compressor 1.

[0059] In the embodiment, the number of indoor units is more than one. The multiple indoor units can be connected in parallel. Different indoor units are arranged in different indoor spaces to adjust the indoor environment of different indoor spaces.

[0060] The indoor unit comprises an indoor heat exchanger 21 and a second control valve 22 connected in series with the indoor heat exchanger 21. The second control valve 22 is connected to the control device 100, which can be used to control the flow rate of the refrigerant flowing through the indoor heat exchanger 21. The second control valve 22 can be an electronic expansion valve.

[0061] The indoor unit, the throttling device 4 and the outdoor heat exchanger 3 are connected in sequence. The pipeline between the throttling device 4 and the indoor unit is connected to one end of the branch refrigerant circuit. The indoor unit, the outdoor heat exchanger 3, the exhaust port of the compressor 1 and the gas inlet of the compressor 1 are connected to the switching assembly 5. The switching assembly 5 can be used to switch the connection state between the indoor unit and the outdoor heat exchanger 3 and the exhaust port of the compressor 1 and the gas inlet of the compressor 1.

[0062] In the present embodiment, the reversing assembly 5 comprises a first reversing valve 51 and a second reversing valve 52, the discharge port of the compressor 1, the suction port of the compressor 1 and the indoor heat exchanger are respectively communicated with different valve ports of the first reversing valve 51, and the discharge port of the compressor 1, the suction port of the compressor 1 and the outdoor heat exchanger 3 are respectively communicated with different valve ports of the second reversing valve 52. In one implementation manner of the present embodiment, the first reversing valve 51 is a first four-way valve, and the second reversing valve 52 is a second four-way valve. In another implementation manner of the present embodiment, the first reversing valve 51 is a first three-way valve, and the second reversing valve 52 is a second three-way valve.

[0063] The first reversing valve 51 has a first valve position and a second valve position, in the first valve position, the suction port of the compressor 1 is communicated with the indoor heat exchanger 21, and the discharge port of the compressor 1 is blocked with the indoor heat exchanger 21, in the second valve position, the suction port of the compressor 1 is blocked with the indoor heat exchanger 21, and the discharge port of the compressor 1 is communicated with the indoor heat exchanger 21.

[0064] The second reversing valve 52 has a third valve position and a fourth valve position, in the third valve position, the discharge port of the compressor 1 is communicated with the outdoor heat exchanger 3, and the suction port of the compressor 1 is blocked with the outdoor heat exchanger 3, in the fourth valve position, the discharge port of the compressor 1 is blocked with the outdoor heat exchanger 3, and the suction port of the compressor 1 is communicated with the outdoor heat exchanger 3.

[0065] In some embodiments, the reversing assembly 5 can further comprise a switching valve (not shown in the figure), the reversing assembly 5 (the switching valve) can be used to switch the connection state between the energy storage device 7 and the discharge port of the compressor 1 and the suction port of the compressor 1. The switching valve can be a three-way valve or a four-way valve, and the switching valve comprises a first switching state and a second switching state; when the switching valve is in the first switching state, the suction port of the compressor 1 is communicated with the energy storage device 7; when the switching valve is in the second switching state, the discharge port of the compressor 1 is communicated with the energy storage device 7.

[0066] Through the adjustment of the first reversing valve 51, the second reversing valve 52, the first control valve 8 and the second control valve 22, the operation modes of the heat pump system include but are not limited to the following modes:

[0067] In the first mode, with reference to Figure 1, the first reversing valve 51 is operated at the first valve position, the second reversing valve 52 is operated at the fourth valve position, the second control valve 22 is closed, the first control valve 8 is opened, and if the reversing assembly 5 comprises a switching valve, the switching valve is in the second switching state, the exhaust port of the compressor 1 is communicated with the energy storage device 7, all the refrigerant discharged from the compressor 1 flows into the refrigerant branch, the refrigerant flowing into the refrigerant branch stores heat in the energy storage device 7 when flowing through the energy storage device 7, and the refrigerant flowing out of the refrigerant branch flows back to the compressor 1 in sequence through the throttling device 4 and the outdoor heat exchanger 3. In the first mode, the indoor heat exchanger 21 stops heat exchange, the outdoor heat exchanger 3 is in the evaporation state, and all the heat is used for heat storage of the energy storage device 7. In the first mode, the energy storage device 7 can be stored heat alone.

[0068] In the second mode, referring to Figure 2 , the first reversing valve 51 is operated at the first valve position, the second reversing valve 52 is operated at the third valve position, the first control valve 8 is opened, the second control valve 22 is opened, and if the reversing assembly 5 comprises a switching valve, the switching valve is in the second switching state, the exhaust port of the compressor 1 is communicated with the energy storage device 7, part of the refrigerant discharged from the compressor 1 flows through the outdoor heat exchanger 3 and the throttling device 4 in sequence, and the other part of the refrigerant discharged from the compressor 1 flows into the refrigerant branch, the refrigerant flowing into the refrigerant branch stores heat in the energy storage device 7 when flowing through the energy storage device 7, and the refrigerant flowing out of the refrigerant branch and the refrigerant flowing out of the throttling device 4 flow into the indoor unit after evaporation and then flow back to the compressor 1. In the second mode, the indoor heat exchanger 21 is in the evaporation state, and the outdoor heat exchanger 3 is in the condensation state. When the indoor space regulated by the indoor unit has a heat exchange demand in the second mode, the indoor fan in the indoor unit can be opened to drive the indoor air to exchange heat with the indoor heat exchanger 21; when the indoor space regulated by the indoor unit does not have a heat exchange demand in the second mode, the indoor fan in the indoor unit can be closed. In the second mode, the heat absorbed by the outdoor heat exchanger 3 from the environment where it is located can be stored in the energy storage device 7. In the second mode, the refrigeration process of the indoor environment can be performed while the energy storage device 7 stores heat or the compressor 1 oil in the refrigerant branch flows back to the compressor 1 while the energy storage device 7 stores heat.

[0069] In the third mode, referring to Figure 3, the first reversing valve 51 is operated at the first valve position, the second reversing valve 52 is operated at the fourth valve position, the first control valve 8 is opened, the second control valve 22 is throttled, and if the reversing assembly 5 comprises a switching valve, the switching valve is in the second switching state. In this way, the exhaust port of the compressor 1 is communicated with the energy storage device 7, and all the refrigerant discharged from the compressor 1 flows into the refrigerant branch. The refrigerant flowing into the refrigerant branch stores heat in the energy storage device 7 when flowing through the energy storage device 7. Part of the refrigerant flowing out of the refrigerant branch flows back to the compressor 1 in sequence through the throttling device 4 and the outdoor heat exchanger 3. Another part of the refrigerant flowing out of the refrigerant branch flows back to the compressor 1 in sequence through the second control valve 22 and the indoor heat exchanger 21. In the third mode, the indoor heat exchanger 21 and the outdoor heat exchanger 3 are both in the evaporating state. When the indoor space regulated by the indoor unit has a heat exchange demand in the third mode, the indoor fan in the indoor unit can be opened to drive the indoor air to exchange heat with the indoor heat exchanger 21. When the indoor space regulated by the indoor unit does not have a heat exchange demand in the third mode, the indoor fan in the indoor unit can be closed. In the third mode, the heat absorbed by the indoor heat exchanger 21 and the outdoor heat exchanger 3 from the environments in which they are located can be stored in the energy storage device 7. In the third mode, the indoor environment can be cooled and the energy storage device 7 stores heat at the same time.

[0070] In the fourth mode, with reference to Figure 4 , the first reversing valve 51 is operated at the first valve position, the second reversing valve 52 is operated at the third valve position, the first control valve 8 is closed, and the second control valve 22 is opened. In this way, the refrigerant discharged from the compressor 1 flows back to the compressor 1 in sequence through the outdoor heat exchanger 3, the throttling device 4, the second control valve 22, and the indoor heat exchanger 21. In the fourth mode, the indoor heat exchanger 21 is in the evaporating state, and the outdoor heat exchanger 3 is in the condensing state. When the indoor space regulated by the indoor unit has a heat exchange demand in the fourth mode, the indoor fan in the indoor unit can be opened to drive the indoor air to exchange heat with the indoor heat exchanger 21. When the indoor space regulated by the indoor unit does not have a heat exchange demand in the fourth mode, the indoor fan in the indoor unit can be closed. In the fourth mode, the indoor environment can be cooled and the energy storage device 7 stops storing heat at the same time.

[0071] In the fifth mode, with reference to Figure 5 , the first reversing valve 51 is operated at the second valve position, the second reversing valve 52 is operated at the fourth valve position, the first control valve 8 is closed, and the second control valve 22 is opened. In this way, the refrigerant discharged from the compressor 1 flows back to the compressor 1 in sequence through the indoor heat exchanger 21, the second control valve 22, the throttling device 4, and the outdoor heat exchanger 3. In the fifth mode, the indoor heat exchanger 21 is in the condensing state, and the outdoor heat exchanger 3 is in the evaporating state. When the indoor space regulated by the indoor unit has a heat exchange demand in the fifth mode, the indoor fan in the indoor unit can be opened to drive the indoor air to exchange heat with the indoor heat exchanger 21. When the indoor space regulated by the indoor unit does not have a heat exchange demand in the fifth mode, the indoor fan in the indoor unit can be closed. In the fifth mode, the indoor environment can be heated and the energy storage device 7 stops storing heat at the same time.

[0072] In the sixth mode, referring to Figure 6 , the first reversing valve 51 is operated at the second valve position, the second reversing valve 52 is operated at the fourth valve position, the first control valve 8 is opened, the second control valve 22 is opened, a part of the refrigerant discharged by the compressor 1 flows back to the compressor 1 in sequence through the indoor heat exchanger 21, the second control valve 22, the throttling device 4 and the outdoor heat exchanger 3; another part of the refrigerant discharged by the compressor 1 flows into the refrigerant branch, the refrigerant flows through the energy storage device 7, and the heat is stored in the energy storage device 7, and the refrigerant flows out of the refrigerant branch and the refrigerant flows out of the indoor unit are merged and flow back to the compressor 1 in sequence through the throttling device 4 and the outdoor heat exchanger 3. In the sixth mode, the indoor heat exchanger 21 is in a condensing state, and the outdoor heat exchanger 3 is in an evaporating state. When the indoor space regulated by the indoor unit has a heat exchange demand in the sixth mode, the indoor fan in the indoor unit can be opened to drive the indoor air to exchange heat with the indoor heat exchanger 21; when the indoor space regulated by the indoor unit does not have a heat exchange demand in the sixth mode, the indoor fan in the indoor unit can be closed. In the sixth mode, the indoor environment can be heated and the energy storage device 7 stores heat.

[0073] In other embodiments, the reversing assembly 5 can also include a third four-way valve, and the discharge port of the compressor 1, the gas return port of the compressor 1, the indoor heat exchanger 21 and the outdoor heat exchanger 3 are connected to different valve ports of the third four-way valve.

[0074] Further, referring to Figure 7 , the heat pump system further comprises an environment sensor 01, which can be arranged at the air return port of the indoor unit to detect the indoor temperature of the corresponding indoor space. The environment sensor 01 is connected to the control device 100.

[0075] Further, referring to Figure 7 , the heat pump system further comprises a temperature detection module 02, which is connected to the control device 100. The temperature detection module 02 can be arranged inside the energy storage device 7 to detect the temperature of the energy storage device 7.

[0076] In the embodiments of the present application, referring to Figure 7 , the control device 100 of the heat pump system comprises a processor 1001 such as a CPU, a memory 1002 and a timer 1003. These components are connected in communication through a communication bus. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory) such as a disk memory. The memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0077] Those skilled in the art can understand that Figure 7The device structure shown in the figures does not constitute a limitation on the device, and can include more or fewer components than shown, or combine certain components, or arrange different components.

[0078] As shown in Figure 7 The memory 1002 as a computer storage medium can include a control program of the heat pump system.

[0079] In the device shown in Figure 7 The processor 1001 can be used to call the control program of the heat pump system stored in the memory 1002, and perform the related step operations of the control method of the heat pump system in the following embodiments.

[0080] The embodiment of the present application also provides a control method of a heat pump system, applied to the heat pump system.

[0081] Referring to Figure 8 , an embodiment of the control method of the heat pump system is proposed. In this embodiment, the control method of the heat pump system comprises:

[0082] Step S10, obtaining the running state of each indoor unit and the energy demand state corresponding to the energy storage device, the running state including whether the corresponding indoor unit is opened in heat exchange mode, and the energy demand state including whether the energy storage device has energy demand;

[0083] The heat exchange mode includes the cooling mode or the heating mode.

[0084] The opening of the heat exchange mode and the energy demand mode corresponding to different indoor units is independently regulated. The indoor unit can open the heat exchange mode after receiving the opening instruction of the heat exchange mode. The indoor unit can close the heat exchange mode after receiving the closing instruction of the heat exchange mode.

[0085] When the energy demand device corresponding to the energy storage device is turned on, it means that the energy storage device has energy demand; when the energy demand device corresponding to the energy storage device is turned off, it means that the energy storage device does not have energy demand. For example, the energy storage device is a water tank, and the energy demand device can be a water heater. When the water heater is turned on, the water heater has energy demand for the water tank, and at this time the hot water stored in the water tank can be used. The energy demand device can be opened or closed according to the instructions received by the indoor unit.

[0086] Step S20, determining the target running mode of the outdoor unit according to more than one running state and energy demand state;

[0087] The operation states of the plurality of indoor units and the energy demand states are different, and the different target operation modes of the outdoor unit correspond to the different target operation modes. The outdoor unit can include a throttling device, a reversing assembly, a compressor, an outdoor heat exchanger, and an outdoor fan corresponding to the outdoor heat exchanger. In different target operation modes, the opening degree of the throttling device and / or the operation state of the reversing assembly and / or the operation frequency of the compressor and / or the operation speed of the outdoor fan are different, or the throttling device and / or the reversing assembly and / or the compressor and / or the outdoor fan in different target operation modes meet the indoor heat exchange requirements of different indoor units and / or the energy requirements of the energy storage device. Different target operation modes correspond to different energy provided to the indoor unit.

[0088] When the modes opened by the plurality of indoor units conflict, the target heat exchange mode can be determined according to the priority between the plurality of indoor units and / or the priority between different modes opened by the plurality of indoor units, and the target operation mode of the outdoor unit is determined according to the target heat exchange mode and the energy demand state. When the modes opened by the plurality of indoor units do not conflict, the mode of the indoor unit that meets the requirements of all indoor units in all opened modes is determined as the target heat exchange mode, and the target operation mode of the outdoor unit is determined according to the target heat exchange mode and the energy demand state.

[0089] Step S30, controlling the operation of the outdoor unit according to the target operation mode.

[0090] The compressor, the throttling device, the outdoor fan, and the reversing assembly in the outdoor unit are controlled according to the control logic corresponding to the target operation mode.

[0091] The control method of the heat pump system is proposed in the embodiment of the present application. The main refrigerant circuit of the heat pump system includes a plurality of indoor units and an outdoor unit. The refrigerant branch circuit connected to the main refrigerant circuit includes an energy storage device. The method is adapted to determine a target operation mode to control the operation of the outdoor unit according to whether each indoor unit opens a heat exchange mode and whether the energy storage device has an energy demand, so that the mode of the outdoor unit is no longer fixed, and the indoor heat exchange requirements of different indoor spaces and the use requirements of the energy storage device can be effectively met, thereby improving the flexibility of the operation of the outdoor unit to meet different use requirements.

[0092] Further, based on the above embodiment, another embodiment of the control method of the heat pump system of the present application is proposed. In this embodiment, referring to Figure 9 , the step S20 includes:

[0093] Step S21, when at least one of the indoor units opens the heat exchange mode and the energy storage device has an energy demand, determining a first operation mode as the target operation mode, so that the opened indoor unit is in the target heat exchange state corresponding to the heat exchange mode and the energy storage device is in the target energy storage state corresponding to the energy demand.

[0094] The first operation mode herein can include the second mode or the third mode or the sixth mode described above. In the first operation mode, the compressor is in an open state, the first control valve is open, the heat exchange mode of the indoor unit corresponding to the target heat exchange state matching the indoor heat exchange demand corresponding to the first operation mode is open, and the second control valve of the indoor unit not in the open heat exchange mode or the second control valve of the indoor unit in the open heat exchange mode and corresponding to the target heat exchange state matching the indoor heat exchange demand corresponding to the first operation mode is closed or operated at a standby opening degree. When the open heat exchange mode of the at least one indoor unit is the cooling mode, the target heat exchange state is the cooling state, and when the open heat exchange mode of the at least one indoor unit is the heating mode, the target heat exchange state is the heating state.

[0095] In one implementation manner of the embodiment, when all the indoor units in the open heat exchange mode are in the same open heat exchange mode, i.e., in the open cooling mode, and the energy storage device has the energy demand, it can be determined that the second mode and / or the third mode described above is the first operation mode herein. When the indoor heat exchange demand is greater than the energy demand corresponding to the energy storage device, it can be determined that the second mode is the first operation mode; when the indoor heat exchange demand is less than the energy demand corresponding to the energy storage device, it can be determined that the third mode is the first operation mode. In addition, when all the indoor units in the open heat exchange mode are in the same open heat exchange mode, i.e., in the open cooling mode, and the energy storage device has the energy demand, it can also be determined that the second mode and the third mode are the first operation mode, or the first mode and the fourth mode are the first operation mode, or the first mode and the second mode are the first operation mode, or the first mode, the second mode and the third mode are the first operation mode, or the first mode and the third mode are the first operation mode, etc.

[0096] In another implementation manner of the embodiment, when all the indoor units in the open heat exchange mode are in the same open heat exchange mode, i.e., in the open heating mode, and the energy storage device has the energy demand, it can be determined that the sixth mode described above is the first operation mode, or the fifth mode and the sixth mode described above are the first operation mode, or the first mode and the sixth mode described above are the first operation mode, or the first mode, the fifth mode and the sixth mode described above are the first operation mode.

[0097] In still another implementation manner of the embodiment, the heat exchange mode includes the cooling mode or the heating mode, all the indoor units in the open heat exchange mode are in different open heat exchange modes, and the energy storage device has the energy demand. The first operation mode can be determined according to the priority of the open heat exchange mode and / or the priority corresponding to the different heat exchange modes and / or the indoor temperature corresponding to the open heat exchange mode.

[0098] In the embodiment, the target energy storage state is the heat storage state. In other embodiments, the target energy storage state can also be the cold storage state.

[0099] Step S22, when at least one of the indoor units opens the heat exchange mode and the energy storage device does not have energy demand, determining that the second operation mode is the target operation mode, so that the opened indoor unit is in the target heat exchange state corresponding to the heat exchange mode and the energy storage device is in the stop energy storage state.

[0100] The second operation mode here can be the fourth mode or the fifth mode described above. In the second operation mode, the compressor is in an open state, the first control valve is closed, the heat exchange mode is opened, the second control valve in the indoor unit corresponding to the target heat exchange state of the indoor unit corresponding to the second operation mode and matching the heat exchange demand of the opened heat exchange mode is opened, the second control valve in the indoor unit opened in the heat exchange mode or the second control valve in the indoor unit opened in the heat exchange mode and corresponding to the target heat exchange state of the indoor unit corresponding to the second operation mode and matching the heat exchange demand is closed or runs at a standby opening degree, and the target heat exchange state of the heat exchange mode opened by the at least one indoor unit is the cooling state when the heat exchange mode opened by the at least one indoor unit is the cooling mode, and the target heat exchange state of the heat exchange mode opened by the at least one indoor unit is the heating state when the heat exchange mode opened by the at least one indoor unit is the heating mode.

[0101] In the embodiment, the target energy storage state is the heat storage state. In other embodiments, the target energy storage state can also be the cold storage state.

[0102] Step S23, when all the indoor units do not open the heat exchange mode and the energy storage device has energy demand, determining that the third operation mode is the target operation mode, so as to stop the heat exchange of the indoor units and the energy storage device is in the target energy storage state.

[0103] The third operation mode here can be the first mode described above. In the third operation mode, the compressor is in an open state, the first control valve is opened, and the second control valve in all indoor units is closed or runs at a standby opening degree.

[0104] In the embodiment, the target energy storage state is the heat storage state. In other embodiments, the target energy storage state can also be the cold storage state.

[0105] Step S24, when all the indoor units do not open the heat exchange mode and the energy storage device does not have energy demand, determining that the fourth operation mode is the target operation mode, so as to make the outdoor unit stop running.

[0106] The fourth operation mode is specifically a stop mode, and the compressor in the outdoor unit is in a closed state.

[0107] In the embodiment, through the above manner, even if the heat exchange requirements of different indoor spaces are different and the energy requirements of the energy storage devices are different, the operation of the outdoor unit can accurately and effectively meet different indoor heat exchange requirements and energy requirements, thereby effectively improving the flexibility of the operation of the outdoor unit to meet different use requirements.

[0108] Further, in the embodiment, when the target operation mode includes more than one mode during the execution of step S30, the outdoor unit can be controlled to operate each mode in a preset order in sequence, or the actual operation parameters of the heat pump system such as the indoor temperature corresponding to the indoor unit that is turned on in the heat exchange mode and / or the energy storage temperature of the energy storage device can be monitored, and the more than one mode included in the target operation mode is operated in sequence according to the monitored parameters.

[0109] For example, when the first operation mode includes the second mode and the third mode, the outdoor unit can be controlled to operate in the second mode first, and then operate in the third mode; or the outdoor unit can be controlled to operate in the third mode first, and then operate in the second mode; or the size relationship between the indoor heat exchange requirement and the energy requirement corresponding to the energy requirement device is monitored, when the indoor heat exchange requirement is greater than the energy requirement corresponding to the energy requirement device, the outdoor unit can be controlled to operate in the second mode; and when the indoor heat exchange requirement is less than the energy requirement corresponding to the energy requirement device, the outdoor unit can be controlled to operate in the third mode.

[0110] For another example, when the first operation mode includes the first mode and the fourth mode, the outdoor unit can be controlled to operate in the first mode first, and then operate in the fourth mode; or the outdoor unit can be controlled to operate in the fourth mode first, and then operate in the first mode; or the actual operation parameters of the heat pump system such as the indoor temperature corresponding to the indoor unit that is turned on in the heat exchange mode and / or the energy storage temperature of the energy storage device are monitored, and the first mode and the fourth mode are operated in sequence according to the indoor temperature and the energy storage temperature.

[0111] For another example, when the first operation mode includes the first mode and the fourth mode, the outdoor unit can be controlled to operate in the first mode first, and then operate in the fourth mode; or the outdoor unit can be controlled to operate in the fourth mode first, and then operate in the first mode; or the actual operation parameters of the heat pump system such as the indoor temperature corresponding to the indoor unit that is turned on in the heat exchange mode and / or the energy storage temperature of the energy storage device are monitored, and the first mode and the fourth mode are operated in sequence according to the indoor temperature and the energy storage temperature.

[0112] For another example, when the first operation mode includes the first mode and the sixth mode, the outdoor unit can be controlled to operate in the first mode first, and then controlled to operate in the sixth mode; or the outdoor unit can be controlled to operate in the sixth mode first, and then controlled to operate in the first mode; or the indoor temperature corresponding to the indoor unit that is turned on in the heat exchange mode and / or the actual operation parameter of the heat pump system such as the energy storage temperature of the energy storage device are monitored, and the first mode and the sixth mode are operated according to the indoor temperature and the energy storage temperature.

[0113] Further, in the embodiment, the heat exchange mode includes a cooling mode or a heating mode, the cooling mode being turned on indicates that the corresponding indoor space has a cooling demand, and the heating mode being turned on indicates that the corresponding indoor space has a heating demand. Based on this, when at least one of the indoor units is turned on in the heat exchange mode and the energy storage device has energy demand, the step of determining the first operation mode as the target operation mode includes:

[0114] When at least one of the indoor units is turned on in the cooling mode, at least one of the indoor units is turned on in the heating mode, and the energy storage device has energy demand, the first operation mode is determined according to the priority of the cooling mode and the heating mode, and the first operation mode is the target operation mode.

[0115] In the embodiment, the priority of the cooling mode and the heating mode can be a pre-set fixed parameter. For example, when the priority is fixedly set as the cooling mode being prior, the operation mode for making the indoor unit in the cooling state and the energy storage device in the energy storage state is determined as the first operation mode, for example, the second mode and / or the third mode are determined as the first operation mode; for another example, when the priority is fixedly set as the heating mode being prior, the operation mode for making the indoor unit in the heating state and the energy storage device in the energy storage state is determined as the first operation mode, for example, the sixth mode is determined as the first operation mode.

[0116] In other embodiments, the priorities corresponding to the cooling mode and the heating mode can also be determined according to the actual operating conditions of the heat pump system, for example, when the number of indoor units in the cooling mode is greater than the number of indoor units in the heating mode or the required cooling capacity of the indoor units in the cooling mode is greater than the heating capacity of the indoor units in the heating mode, the corresponding priority is cooling priority, and then the operating mode for satisfying the indoor units in the cooling state and the energy storage device in the energy storage state is determined as the first operating mode, for example, the second mode and / or the third mode described above are determined as the first operating mode; for example, when the number of indoor units in the cooling mode is less than the number of indoor units in the heating mode or the required cooling capacity of the indoor units in the cooling mode is less than the heating capacity of the indoor units in the heating mode, the corresponding priority is heating priority, and then the operating mode for making the indoor units in the cooling state and the energy storage device in the energy storage state is determined as the first operating mode, for example, the sixth mode described above is determined as the first operating mode. For example, the priorities corresponding to the cooling mode and the heating mode can be determined according to the outdoor environment temperature, and when the outdoor environment temperature is less than a preset temperature, the priority is heating priority; when the outdoor environment is greater than the preset temperature, the priority is cooling priority.

[0117] In the embodiment, when the heat exchange requirements of different indoor spaces conflict, the target operating mode of the outdoor unit can be selected based on the priority, so that the heat pump system can also operate normally when the requirements conflict, and the indoor heat exchange requirements and the energy requirements of the indoor energy storage device can be maximized to meet the priority.

[0118] Further, in the embodiment, the heat exchange mode includes a cooling mode or a heating mode, and the cooling mode is opened when the corresponding indoor space has a cooling requirement, and the heating mode is opened when the corresponding indoor space has a heating requirement. The step of determining the second operating mode as the target operating mode when at least one of the indoor units opens the heat exchange mode and the energy storage device does not have an energy requirement includes:

[0119] When at least one of the indoor units opens the cooling mode, at least one of the indoor units opens the heating mode, and the energy storage device does not have an energy requirement, the second operating mode is determined according to the priority corresponding to the cooling mode and the heating mode, and the second operating mode is the target operating mode.

[0120] In the embodiment, the priority corresponding to the cooling mode and the heating mode can be a pre-set fixed parameter. For example, when the priority is fixedly set as the cooling mode priority, the operation mode for making the indoor unit in the cooling state and the energy storage device in the energy storage state is determined as the first operation mode, for example, the second mode and / or the third mode described above are determined as the first operation mode. For another example, when the priority is fixedly set as the heating mode priority, the operation mode for making the indoor unit in the heating state and the energy storage device in the energy storage state is determined as the first operation mode, for example, the sixth mode described above is determined as the first operation mode.

[0121] In other embodiments, the priority corresponding to the cooling mode and the heating mode can also be determined according to the actual operation condition of the heat pump system. For example, when the number of indoor units in the cooling mode is greater than the number of indoor units in the heating mode or the required cooling capacity corresponding to the indoor unit in the cooling mode is greater than the heating capacity corresponding to the indoor unit in the heating mode, the priority is cooling priority, and the operation mode for making the indoor unit in the cooling state and the energy storage device in the energy storage state is determined as the first operation mode, for example, the fourth mode described above is determined as the first operation mode. For another example, when the number of indoor units in the cooling mode is less than the number of indoor units in the heating mode or the required cooling capacity corresponding to the indoor unit in the cooling mode is less than the heating capacity corresponding to the indoor unit in the heating mode, the priority is heating priority, and the operation mode for making the indoor unit in the heating state and the energy storage device in the energy storage state is determined as the first operation mode, for example, the fifth mode described above is determined as the first operation mode. For another example, the priority corresponding to the cooling mode and the heating mode can be determined according to the outdoor environment temperature. When the outdoor environment temperature is less than a pre-set temperature, the priority is heating priority; and when the outdoor environment temperature is greater than the pre-set temperature, the priority is cooling priority.

[0122] In the embodiment, by the above-mentioned mode, when the heat exchange demands of different indoor spaces conflict, the target operation mode of the outdoor unit can be selected based on the priority, so that the heat pump system can also operate normally when the demands conflict, to maximize the indoor heat exchange demand according to the priority.

[0123] In order to more intuitively understand the scheme of the control method of the heat pump system mentioned in the embodiment, taking two indoor units connected to one outdoor unit as an example, the heat exchange mode of the indoor unit is in different states, and the energy demand state of the energy demand device and the mode of the outdoor unit can be as shown in the following table:

[0124]

[0125] Further, based on any of the above embodiments, another embodiment of the control method of the heat pump system of the present application is proposed. In the embodiment, referring to Figure 10 , the step S30 is executed during or after the process, and further includes:

[0126] Step S40, when the target operation mode is the first operation mode, and the indoor unit with the opened heat exchange mode is the indoor unit with the opened refrigeration mode, the outdoor unit is controlled to operate in the third operation mode;

[0127] In an implementation form of the embodiment, the indoor heat exchange demand comprises an indoor refrigeration demand, the first operation mode is the second mode and / or the third mode, and the third operation mode is the first mode. During the operation of the outdoor unit in the second mode or the third mode, the indoor temperature corresponding to the indoor unit with the opened refrigeration mode is monitored. When the indoor temperature corresponding to all the indoor units with the opened refrigeration mode is less than or equal to the corresponding set temperature, it is determined that the corresponding indoor unit reaches the temperature stop. At this time, the outdoor unit can be controlled to operate in the first mode. When the indoor temperature corresponding to the indoor unit with the opened refrigeration mode is greater than the corresponding set temperature, it is determined that the corresponding indoor unit does not reach the temperature stop. At this time, the outdoor unit can be controlled to maintain the current mode.

[0128] In another implementation form of the embodiment, the target heat exchange state comprises a heating state, the first operation mode is the sixth mode, and the third operation mode is the first mode. During the operation of the outdoor unit in the sixth mode, the indoor temperature corresponding to the indoor unit with the opened heating mode is monitored. When the indoor temperature corresponding to all the indoor units with the opened heating mode is greater than or equal to the corresponding set temperature, it is determined that the corresponding indoor unit reaches the temperature stop. At this time, the outdoor unit can be controlled to operate in the first mode. When the indoor temperature corresponding to the indoor unit with the opened heating mode is greater than the corresponding set temperature, it is determined that the corresponding indoor unit does not reach the temperature stop. At this time, the outdoor unit can be controlled to maintain the current mode.

[0129] Step S50, when the target operation mode is the first operation mode, and the energy storage temperature of the energy storage device reaches the set energy storage temperature, the outdoor unit is controlled to operate in the second operation mode.

[0130] The energy storage temperature can be detected by the temperature detection module.

[0131] In an implementation form of the embodiment, the indoor heat exchange demand comprises an indoor refrigeration demand, the first operation mode is the second mode and / or the third mode, and the second operation mode is the fourth mode. During the operation of the outdoor unit in the second mode or the third mode, whether the energy storage temperature of the energy storage device is greater than or equal to the set energy storage temperature is monitored. When the energy storage temperature is greater than or equal to the corresponding set energy storage temperature, the outdoor unit can be controlled to operate in the first mode. When the energy storage temperature is less than the corresponding set energy storage temperature, the outdoor unit can be controlled to maintain the current mode.

[0132] In another implementation form of the embodiment, the target heat exchange state comprises a heating state, the first operation mode is the sixth mode described above, and the second operation mode is the fifth mode described above. During operation of the outdoor unit in the sixth mode, it is monitored whether the energy storage temperature of the energy storage device is greater than or equal to the set energy storage temperature. When it is monitored that the energy storage temperature is greater than or equal to the corresponding set energy storage temperature, the outdoor unit is controlled to operate in the fifth mode. When it is monitored that the energy storage temperature is less than the corresponding set energy storage temperature, the outdoor unit is controlled to maintain the current mode of operation.

[0133] In the embodiment, when the outdoor unit needs to meet the indoor heat exchange demand and the energy demand of the energy storage device, the indoor unit is switched to the separate energy storage mode of operation in time when the indoor heat exchange demand is met, and the indoor unit is switched to the separate heat exchange mode of operation in time when the energy demand is met, thereby facilitating the accurate satisfaction of the indoor comfort and the energy storage demand and improving the energy efficiency of the heat pump system.

[0134] In other embodiments, when the indoor heat exchange demand comprises a cooling demand, when the target operation mode is the second mode or the third mode described above, and the indoor unit operating in the cooling mode reaches temperature stop, and there is an indoor unit operating in the heating mode, the outdoor unit is controlled to operate in the sixth mode.

[0135] In other embodiments, when the indoor heat exchange demand comprises a heating demand, when the target operation mode is the sixth mode, and the indoor unit operating in the heating mode reaches temperature stop, and there is an indoor unit operating in the cooling mode, the outdoor unit is controlled to operate in the second mode or the third mode.

[0136] Further, based on any of the above embodiments, another embodiment of the control method of the heat pump system is provided. In the embodiment, the target heat exchange state comprises a heating state, the target energy storage state comprises a heat storage state, the first operation mode comprises a first sub-mode and a second sub-mode, and the step S30 comprises: Figure 11

[0137] The step S31 comprises: when the target operation mode is the first operation mode, continuously monitoring the energy storage temperature of the energy storage device.

[0138] The temperature data detected by the temperature detection module is acquired in real time or at intervals for a set time length, and the energy storage temperature is determined according to the detected temperature data.

[0139] The step S32 comprises: when the energy storage temperature is less than a first preset temperature, controlling the outdoor unit to operate in the first sub-mode, so that the energy storage device is in the heat storage state and the indoor unit stops indoor heat exchange.

[0140] In the embodiment, the first sub-mode is the first mode described above.​

[0141] Step S33, when the energy storage temperature is greater than the second preset temperature, controlling the outdoor unit to run in a second sub-mode, with the energy storage device in a heat storage state and the indoor unit in a heating state;

[0142] In this embodiment, the second sub-mode is the sixth mode described above.

[0143] Step S34, when the energy storage temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, controlling the outdoor unit to maintain the current state.

[0144] The first preset temperature and the second preset temperature can be temperatures set according to the reliable operation requirements and / or energy efficiency requirements of the heat pump system, can also be temperatures determined according to the set energy storage temperature, and can also be the first preset temperature and the second preset temperature determined according to the set energy storage temperature, the outdoor environment temperature, the outdoor heat exchanger temperature, and the discharge temperature of the compressor, so as to meet the heat exchange requirements and energy requirements while improving the energy efficiency and stability of system operation.

[0145] Wherein, after determining the first running mode, the outdoor unit can be controlled to run in the second sub-mode first, and the energy storage temperature of the energy storage device is continuously monitored during the running in the second sub-mode. When the energy storage temperature is less than the first preset temperature, the outdoor unit is controlled to switch to the first sub-mode for running, otherwise, the running in the second sub-mode is maintained. During the running of the outdoor unit in the first sub-mode, the energy storage temperature is continuously monitored. When the energy storage temperature is greater than the second preset temperature, the outdoor unit is controlled to switch to the second sub-mode for running, otherwise, the running in the first sub-mode is maintained. During the running of the outdoor unit in the second sub-mode, the energy storage temperature is continuously monitored. When the energy storage temperature is less than the first preset temperature, the outdoor unit is controlled to switch to the first sub-mode for running, otherwise, the running in the second sub-mode is maintained.

[0146] In this embodiment, the running of the outdoor unit is controlled based on the continuously monitored energy storage temperature, so as to ensure that when the system needs to provide heat for the energy storage device and indoor heating at the same time, the energy storage temperature of the energy storage device is high enough before the second sub-mode is run to meet the heat requirements and indoor heating requirements at the same time, which is beneficial to improve the energy efficiency of the system to meet the heat requirements of the energy storage device while improving the indoor heating efficiency.

[0147] Further, in this embodiment, during or after the execution of step S30, when the indoor heat exchange requirements include indoor heating requirements, and the energy storage temperature of the energy storage device does not reach the set energy storage temperature and the indoor unit that is turned on in the heating mode does not reach the temperature stop, the outdoor unit can be maintained to run according to steps S31 to S34.

[0148] Further, in the embodiment, the control method of the heat pump system further comprises: when the target operation mode is the first operation mode, controlling the indoor unit in the heat exchange mode to output prompt information for prompting the indoor unit to run in conflict with the outdoor unit during the outdoor unit running in the first sub-mode.

[0149] The prompt information can be output in the form of text, light, sound, or the like.

[0150] In the embodiment, through the output of the prompt information, it is beneficial to ensure that the user can know the current running situation of the heat pump system, avoid the user mistakenly thinking that the system has a fault, and determine whether to adjust the running of the heat pump system based on the actual demand, thereby effectively improving the matching degree of the heat pump system and the user demand.

[0151] Further, based on any of the above embodiments, another optional embodiment of the control method of the heat pump system of the present application is proposed. Referring to Figure 12 In the embodiment, the control method of the heat pump system further comprises:

[0152] Step S100, when the outdoor unit needs to be switched to the second target mode during the first target mode, the compressor of the outdoor unit is controlled to maintain on or off according to the indoor unit state and / or the state of the energy storage device corresponding to the first target mode and the second target mode.

[0153] When the heat pump system needs to be switched to the target operation mode during the running of other modes or the heat pump system needs to be switched to other modes during the running of the target operation mode, the indoor heat exchange demand before and after the switching can be followed.

[0154] The indoor unit state includes whether the indoor unit stops heat exchange and the target heat exchange state (cooling state or heating state) when the indoor unit does not stop heat exchange.

[0155] The state of the energy storage device includes whether the energy storage device stops energy storage and the target energy storage state (heat storage state or cold storage state) when the energy storage device does not stop energy storage.

[0156] The states of the indoor unit and / or the energy storage device corresponding to the first target mode and the second target mode are different, and the on-off state of the compressor of the outdoor unit is different.

[0157] In the embodiment, when the target heat exchange states of the indoor unit corresponding to the first target mode and the second target mode are opposite (cooling state and heating state, respectively), the compressor of the outdoor unit is controlled to be off; when the target heat exchange states of the indoor unit corresponding to the first target mode and the second target mode are the same, the compressor of the outdoor unit is controlled to maintain on.

[0158] Further, in the embodiment, one end of the refrigerant branch is connected with the exhaust port of the compressor, when the energy storage device corresponding to one of the first target mode and the second target mode is in the heat storage state and the indoor unit stops heat exchange, the indoor unit corresponding to the other of the first target mode and the second target mode is in the refrigeration state, the compressor of the outdoor unit is controlled to stop; when the energy storage device corresponding to one of the first target mode and the second target mode is in the heat storage state and the indoor unit stops heat exchange, the indoor unit corresponding to the other of the first target mode and the second target mode is in the heat storage state, the compressor of the outdoor unit is controlled to maintain on.

[0159] In order to more intuitively understand the scheme of the embodiment, whether the compressor of the outdoor unit is stopped when the outdoor unit is switched between different modes can be seen from the following table:

[0160]

[0161] In the embodiment, when the mode A is the first target mode and the mode B is the second target mode, or the mode B is the first target mode and the mode A is the second target mode, whether the compressor of the outdoor unit is maintained on or stopped can be determined according to the corresponding relationship shown in the above table.

[0162] For example, when the outdoor unit is switched from the fourth mode to the second mode or the third mode, the compressor of the outdoor unit is not stopped; for another example, when the outdoor unit is switched from the first mode to the second mode or the third mode, the compressor of the outdoor unit is stopped; for another example, when the outdoor unit is switched from the first mode to the fifth mode, the compressor of the outdoor unit is not stopped, and the like.

[0163] Step S200, the outdoor unit is controlled to switch to the second target mode.

[0164] Among them, one of the first target mode and the second target mode is the target running mode.

[0165] In the embodiment, when the outdoor unit needs to switch the running mode, the state of the indoor unit before and after the mode switching and / or the state of the energy storage device are combined to control whether the outdoor unit switches the mode in the on state of the compressor or in the off state, which is beneficial to reduce the number of times that the outdoor unit switches the running mode in the off state, reduce the system fluctuation caused by the mode switching, and thus effectively improve the stability of the system running.

[0166] In addition, the embodiment of the present application also provides a storage medium, and the storage medium stores a control program of a heat pump system. When the control program of the heat pump system is executed by a processor, the related steps of any one of the embodiments of the control method of the heat pump system are realized.

[0167] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or system that comprises the recited element.

[0168] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0169] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and the necessary general hardware platform, of course, they can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disk) as described above, and includes a number of instructions for making a terminal device (which can be a mobile phone, a computer, a server, a heat pump system, or a network device, etc.) execute the methods described in the various embodiments of the present application.

[0170] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A control method of a heat pump system, characterized by, The heat pump system comprises a main refrigerant circuit and a branch refrigerant circuit connected to the main refrigerant circuit, the main refrigerant circuit comprises more than one indoor unit and an outdoor unit, the branch refrigerant circuit comprises an energy storage device, and the control method of the heat pump system comprises the following steps: obtaining the operating state of each indoor unit and the energy demand state of the energy storage device, the operating state comprising whether the corresponding indoor unit is in heat exchange mode, and the energy demand state comprising whether the energy storage device has energy demand; determining a target operating mode of the outdoor unit according to more than one operating state and energy demand state; controlling the outdoor unit to operate according to the target operating mode; The control method of the heat pump system further comprises: when the outdoor unit needs to switch to a second target mode during operation in a first target mode, controlling the compressor of the outdoor unit to maintain on or off according to the state of the indoor unit corresponding to the first target mode and the second target mode and / or the state of the energy storage device; controlling the outdoor unit to switch to the second target mode; The step of controlling the compressor of the outdoor unit to maintain on or off according to the state of the indoor unit corresponding to the first target mode and the second target mode and / or the state of the energy storage device comprises: when the target heat exchange states of the indoor units corresponding to the first target mode and the second target mode are opposite, controlling the compressor of the outdoor unit to off; when the energy storage device corresponding to one of the first target mode and the second target mode is in a heat storage state and the indoor unit stops heat exchange, and the indoor unit corresponding to the other of the first target mode and the second target mode is in a cooling state, controlling the compressor of the outdoor unit to off; when the target heat exchange states of the indoor units corresponding to the first target mode and the second target mode are the same, controlling the compressor of the outdoor unit to maintain on; when the energy storage device corresponding to one of the first target mode and the second target mode is in a heat storage state and the indoor unit stops heat exchange, and the indoor unit corresponding to the other of the first target mode and the second target mode is in a heating state, controlling the compressor of the outdoor unit to maintain on; wherein one of the first target mode and the second target mode is the target operating mode.

2. The control method of a heat pump system according to claim 1, characterized by, The step of determining a target operating mode of the outdoor unit according to more than one operating state and energy demand state comprises: when at least one indoor unit is in the heat exchange mode and the energy storage device has energy demand, determining a first operating mode as the target operating mode, so that the indoor unit in the heat exchange mode is in a target heat exchange state corresponding to the heat exchange mode, and the energy storage device is in a target energy storage state corresponding to the energy demand; when at least one indoor unit is in the heat exchange mode and the energy storage device does not have energy demand, determining a second operating mode as the target operating mode, so that the indoor unit in the heat exchange mode is in a target heat exchange state corresponding to the heat exchange mode, and the energy storage device is in a stop energy storage state; determining a third operation mode as the target operation mode when all the indoor units do not open the heat exchange mode and the energy storage device has energy demand, to stop the heat exchange of the indoor units and the energy storage device in the target energy storage state; determining a fourth operation mode as the target operation mode when all the indoor units do not open the heat exchange mode and the energy storage device has no energy demand, to make the outdoor unit run in a shutdown mode.

3. The control method of a heat pump system according to claim 2, characterized by, The heat exchange mode includes a cooling mode or a heating mode, and the step of determining the first operation mode as the target operation mode when at least one of the indoor units opens the heat exchange mode and the energy storage device has energy demand includes: When at least one of the indoor units opens the cooling mode, at least one of the indoor units opens the heating mode, and the energy storage device has energy demand, determining the first operation mode according to the priority corresponding to the cooling mode and the heating mode, and the first operation mode is the target operation mode.

4. The control method of a heat pump system according to claim 2, characterized by, The heat exchange mode includes a cooling mode or a heating mode, and the step of determining the second operation mode as the target operation mode when at least one of the indoor units opens the heat exchange mode and the energy storage device has no energy demand includes: When at least one of the indoor units opens the cooling mode, at least one of the indoor units opens the heating mode, and the energy storage device has no energy demand, determining the second operation mode according to the priority corresponding to the cooling mode and the heating mode, and the second operation mode is the target operation mode.

5. The control method of a heat pump system according to claim 2, characterized by, The step of controlling the outdoor unit to run in the target operation mode further includes: When the target operation mode is the first operation mode, and the indoor unit that opens the heat exchange mode reaches temperature shutdown, controlling the outdoor unit to run in the third operation mode; When the target operation mode is the first operation mode, and the energy storage temperature of the energy storage device reaches the set energy storage temperature, controlling the outdoor unit to run in the second operation mode.

6. The control method of a heat pump system according to claim 2, characterized by, The target heat exchange state includes a heating state, the target energy storage state includes a heat storage state, the first operation mode includes a first sub-mode and a second sub-mode, and the step of controlling the outdoor unit to run in the target operation mode includes: When the target operation mode is the first operation mode, continuously monitoring the energy storage temperature of the energy storage device; When the energy storage temperature is less than a first preset temperature, controlling the outdoor unit to run in the first sub-mode, so that the energy storage device is in the heat storage state and the indoor unit stops indoor heat exchange; When the energy storage temperature is greater than a second preset temperature, controlling the outdoor unit to run in the second sub-mode, so that the energy storage device is in the heat storage state and the indoor unit is in the heating state; When the energy storage temperature is greater than or equal to the first preset temperature, and the energy storage temperature is less than or equal to the second preset temperature, controlling the outdoor unit to run in the current state.

7. The control method of a heat pump system according to claim 6, characterized by, The control method of the heat pump system further includes: When the target operation mode is the first operation mode, an indoor unit output prompt information of the heat exchange mode is controlled to be turned on during the outdoor unit is operated in the first sub-mode, to prompt that the indoor unit operation conflicts with the outdoor unit operation.

8. A heat pump system, characterized by, The heat pump system comprises a control device, a main refrigerant circuit, and a branch refrigerant circuit connected with the main refrigerant circuit, the main refrigerant circuit comprises more than one indoor unit and an outdoor unit, and the branch refrigerant circuit comprises an energy storage device; The indoor unit and the outdoor unit are connected with the control device, and the control device comprises a memory, a processor, and a heat pump system control program stored in the memory and executable on the processor, and the heat pump system control program, when executed by the processor, implements the steps of the heat pump system control method according to any one of claims 1 to 7.

9. A storage medium, characterized by The storage medium stores a heat pump system control program, and the heat pump system control program, when executed by the processor, implements the steps of the heat pump system control method according to any one of claims 1 to 7.

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