Heat pump system, control method of heat pump system, air conditioner and storage medium

Abstract

The invention discloses a heat pump system, a control method of the heat pump system, an air conditioner and a storage medium. In the heat pump system, a refrigerant main path comprises a first heat exchanger and a second heat exchanger, and a refrigerant branch comprises a control valve; a first pipe section between the first heat exchanger and the second heat exchanger and a second pipe section on the refrigerant branch are both in heat exchange connection with the energy accumulator, and a first throttling component is arranged between the first pipe section and the first heat exchanger and / or a second throttling component is arranged between the first pipe section and the second heat exchanger; the pipeline between the energy accumulator and the first heat exchanger is connected with the first end of the refrigerant branch; the second end of the refrigerant branch is communicated with an exhaust port of the compressor, or the second end of the refrigerant branch is communicated with an air return port of the compressor; the second heat exchanger communicates with an exhaust port of the compressor, and the first heat exchanger communicates with an air return port of the compressor, or the second heat exchanger communicates with the air return port of the compressor, and the first heat exchanger communicates with the exhaust port of the compressor. The heat exchange efficiency is improved when the heat pump system is started.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a heat pump system, a control method of the heat pump system, an air conditioner and a storage medium. Background Art

[0002] The air conditioner can output energy to the environment through cooling operation or heating operation to adjust the indoor environment.

[0003] Among them, after the air conditioner starts the heat pump system, it usually takes a long time to achieve a better cooling effect or heating effect, and there is a problem of poor heat exchange efficiency during startup. Summary of the invention

[0004] The main purpose of the present invention is to provide a heat pump system, a control method of the heat pump system, an air conditioner and a storage medium, aiming to improve the heat exchange efficiency when the heat pump system is started.

[0005] To achieve the above object, the present invention provides a heat pump system, the heat pump system comprising a compressor, an accumulator, a refrigerant main circuit and a refrigerant branch circuit, the refrigerant main circuit comprising a first heat exchanger and a second heat exchanger connected by a pipeline, the refrigerant branch circuit comprising a control valve, the control valve being used to control the conduction, cutoff and opening degree of the refrigerant branch circuit;

[0006] The first pipe section between the first heat exchanger and the second heat exchanger and the second pipe section on the refrigerant branch are both connected to the energy storage medium in the accumulator for heat exchange, and a first throttling component is provided between the first pipe section and the first heat exchanger and / or a second throttling component is provided between the first pipe section and the second heat exchanger;

[0007] The pipeline between the accumulator and the first heat exchanger is connected to the first end of the refrigerant branch; the second end of the refrigerant branch is connected to the exhaust port of the compressor, or the second end of the refrigerant branch is connected to the return air port of the compressor; the second heat exchanger is connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return air port of the compressor, or the second heat exchanger is connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

[0008] Optionally, the control valve is arranged between the first end of the refrigerant branch and the second pipe section.

[0009] Optionally, the heat pump system further comprises a flow direction switching component, and the first heat exchanger, the second heat exchanger, the exhaust port of the compressor, the return air port of the compressor and the second end of the refrigerant branch are all connected to the flow direction switching component;

[0010] When the flow direction switching assembly is in the first state, the second end of the refrigerant branch and the second heat exchanger are both connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return port of the compressor;

[0011] When the flow direction switching component is in the second state, the second end of the refrigerant branch and the second heat exchanger are both connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

[0012] Optionally, the flow direction switching component includes:

[0013] A first reversing assembly, the exhaust port of the compressor, the return air port of the compressor and the second heat exchanger are all connected to the first reversing assembly;

[0014] A second reversing component, the exhaust port of the compressor, the return port of the compressor, the second end of the refrigerant branch, and the first heat exchanger are all connected to the second reversing component.

[0015] In addition, in order to achieve the above purpose, the present application also proposes a control method of a heat pump system, which is applied to the above heat pump system. The control method of the heat pump system also includes the following steps:

[0016] Obtaining the operation stage of the heat pump system;

[0017] When the operation stage is the start-up stage of the heat exchange mode, the control valve is controlled to operate, and the first throttling component and / or the second throttling component are controlled to operate, so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator;

[0018] When the operation stage is the continuous operation stage of the heat exchange mode, the control valve is controlled to operate, and the first throttling component and / or the second throttling component are controlled to operate, so that the accumulator stores energy corresponding to the current heat exchange mode.

[0019] Optionally, the heat pump system further includes a flow direction switching component, the first heat exchanger, the second heat exchanger, the exhaust port of the compressor, the return port of the compressor, and the second end of the refrigerant branch are all connected to the flow direction switching component, the heat exchange mode includes a cooling mode or a heating mode, and after the step of obtaining the operation stage of the heat pump system, it also includes:

[0020] When the operation stage is the startup stage of the cooling mode, the flow direction switching component is controlled to operate in a first state, so that the second end of the refrigerant branch and the second heat exchanger are both connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return air port of the compressor;

[0021] When the operation stage is the startup stage of the heating mode, the flow switching component is controlled to operate in the second state so that the second end of the refrigerant branch and the second heat exchanger are connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

[0022] Optionally, when the operation stage is the start-up stage of the heat exchange mode, the step of controlling the control valve to operate, and controlling the first throttling component and / or the second throttling component to operate so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator includes:

[0023] When the operation stage is the startup stage of the cooling mode, the control valve is controlled to open, the first throttling component is controlled to open with a throttling opening, and / or the second throttling component is controlled to open with an opening greater than the throttling opening.

[0024] Optionally, when the operation stage is the startup stage of the cooling mode, after the step of controlling the flow direction switching component to operate in the first state, the method further includes:

[0025] Acquiring a first temperature of an energy storage medium in the energy accumulator;

[0026] When the first temperature is lower than a first preset temperature, executing the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening;

[0027] When the first temperature is greater than or equal to the first preset temperature, the control valve is controlled to close or remain closed.

[0028] Optionally, after the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening when the first temperature is lower than the first preset temperature, the method further includes:

[0029] When the start-up time of the refrigeration mode reaches a first preset time, or when the temperature of the energy storage medium in the accumulator is greater than or equal to a second preset temperature, controlling the control valve to close;

[0030] Wherein, the second preset temperature is greater than or equal to the first preset temperature.

[0031] Optionally, when the operation stage is the start-up stage of the heat exchange mode, the step of controlling the control valve to operate, and controlling the first throttling component and / or the second throttling component to operate so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator includes:

[0032] When the operation stage is the start-up stage of the heating mode, the control valve is controlled to open, the first throttling component is controlled to open with an opening greater than the throttling opening, and / or the second throttling component is controlled to open with a throttling opening.

[0033] Optionally, when the operation stage is the startup stage of the heating mode, after the step of controlling the flow direction switching component to operate in the second state, the method further includes:

[0034] acquiring a second temperature of the energy storage medium in the energy accumulator;

[0035] When the second temperature is greater than a third preset temperature, executing the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening;

[0036] When the second temperature is less than or equal to the third preset temperature, the control valve is controlled to close or remain closed.

[0037] Optionally, after the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening when the second temperature is greater than a third preset temperature, the method further includes:

[0038] When the start-up time of the heating mode reaches a second preset time, or when the temperature of the energy storage medium in the accumulator is less than or equal to a fourth preset temperature, controlling the control valve to close;

[0039] Wherein, the fourth preset temperature is less than or equal to the third preset temperature.

[0040] Optionally, the control valve is disposed between the first end of the refrigerant branch and the second pipe section, and the step of controlling the control valve to open includes:

[0041] When the operation stage is a start-up stage of the heating mode, the control valve is controlled to open with a throttling opening.

[0042] Optionally, a first throttling component is provided between the first pipe section and the first heat exchanger, and a second throttling component is provided between the first pipe section and the second heat exchanger, and the step of controlling the operation of the control valve and controlling the operation of the first throttling component and / or the second throttling component so that the accumulator stores energy corresponding to the current heat exchange mode includes:

[0043] When the heat pump system is in a continuous operation stage of a cooling mode, obtaining a third temperature of the energy storage medium in the energy accumulator;

[0044] When the third temperature is lower than a fifth preset temperature, the control valve is controlled to be closed, the first throttling component is controlled to be opened at a throttling opening, and the second throttling component is controlled to be opened at an opening greater than the throttling opening;

[0045] When the third temperature is greater than or equal to the fifth preset temperature, the control valve is controlled to be closed, and the second throttling component is controlled to be opened at a throttling opening;

[0046] Wherein, the cooling mode corresponds to that the second end of the refrigerant branch and the second heat exchanger are both connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return air port of the compressor.

[0047] Optionally, a first throttling component is provided between the first pipe section and the first heat exchanger, and a second throttling component is provided between the first pipe section and the second heat exchanger, and the step of controlling the operation of the control valve and controlling the operation of the first throttling component and / or the second throttling component so that the accumulator stores energy corresponding to the current heat exchange mode includes:

[0048] When the heat pump system is in the continuous operation stage of the heating mode, the control valve is controlled to be closed, the first throttling component is controlled to be opened with an opening greater than the throttling opening, and the second throttling component is controlled to be opened with the throttling opening;

[0049] Wherein, the heating mode corresponds to that the second end of the refrigerant branch and the second heat exchanger are both connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

[0050] In addition, in order to achieve the above object, the present application also proposes an air conditioner, the air conditioner comprising a control device and a heat pump system as described in any one of the above items, the control device being connected to the heat pump system;

[0051] The control device comprises:

[0052] A memory, a processor, and a control program for a heat pump system stored in the memory and executable on the processor, wherein the control program for the heat pump system, when executed by the processor, implements the steps of the control method for the heat pump system as described in any one of the above items.

[0053] In addition, in order to achieve the above-mentioned purpose, the present application also proposes a storage medium, on which a control program of a heat pump system is stored. When the control program of the heat pump system is executed by a processor, the steps of the control method of the heat pump system as described in any of the above items are implemented.

[0054] The present invention proposes a heat pump system, in which an accumulator is arranged, and a first pipe section between an indoor heat exchanger and an outdoor heat exchanger and a second pipe section on a refrigerant branch are both connected to an energy storage medium in the accumulator for heat exchange. During continuous operation of the heat pump system for cooling or heating, corresponding energy can be stored in the energy storage medium by adjusting the control valve, the first throttling component and the second throttling component. When the heat pump system is started for cooling or heating, the control valve, the first throttling component and the second throttling component can be adjusted to allow the refrigerant to flow through the refrigerant branch and absorb the energy required for cooling or heating from the energy storage medium. Based on this, the heat pump system can be quickly cooled or heated when started, thereby effectively improving the heat exchange efficiency when the heat pump system is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic diagram of the flow path structure of an embodiment of a heat pump system of the present invention;

[0056] Figure 2 A schematic diagram of the hardware structure involved in the operation of an air conditioner according to an embodiment of the present invention;

[0057] Figure 3 A schematic flow chart of an embodiment of a control method for a heat pump system of the present invention;

[0058] Figure 4 A schematic flow chart of another embodiment of a control method for a heat pump system of the present invention;

[0059] Figure 5 A schematic diagram of the refrigerant flow direction during the refrigeration startup operation phase of the heat pump system control method embodiment of the present invention;

[0060] Figure 6 A schematic diagram of the refrigerant flow direction in the heating startup operation stage involved in an embodiment of the control method for a heat pump system of the present invention;

[0061] Figure 7 A schematic diagram of the refrigerant flow direction in the continuous refrigeration operation stage involved in an embodiment of the control method for a heat pump system of the present invention;

[0062] Figure 8 It is a schematic diagram of the refrigerant flow direction in the continuous heating operation stage involved in the control method embodiment of the heat pump system of the present invention.

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

[0064] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0065] The embodiment of the present invention provides a heat pump system 200. In this embodiment, the heat pump system 200 is a system in an air conditioner. In other embodiments, the heat pump system 200 may also be a system in other devices used for heat exchange and regulation, such as a water heater, a refrigerator, etc.

[0066] In the embodiment of the present invention, refer to Figure 1 The heat pump system 200 includes a compressor 1, an accumulator 6, a refrigerant main circuit and a refrigerant branch circuit. The refrigerant main circuit includes a first heat exchanger 9 and a second heat exchanger 4 connected by a pipeline. The refrigerant branch circuit includes a control valve 8. The control valve 8 is used to control the conduction and cutoff of the refrigerant branch circuit and the opening degree of the refrigerant branch circuit.

[0067] The first pipe section between the first heat exchanger 9 and the second heat exchanger 4 and the second pipe section on the refrigerant branch are both connected to the energy storage medium in the accumulator 6 for heat exchange, and a first throttling component 7 is provided between the first pipe section and the first heat exchanger 9 and / or a second throttling component 5 is provided between the first pipe section and the second heat exchanger 4;

[0068] The pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch; the second end of the refrigerant branch is connected to the exhaust port of the compressor 1, or the second end of the refrigerant branch is connected to the return air port of the compressor 1; the second heat exchanger is connected to the exhaust port of the compressor 1, and the first heat exchanger 9 is connected to the return air port of the compressor 1, or the second heat exchanger 4 is connected to the return air port of the compressor 1, and the first heat exchanger 9 is connected to the exhaust port of the compressor 1.

[0069] In this embodiment, the first heat exchanger 9 is arranged indoors, and the second heat exchanger 4 is arranged outdoors. In other embodiments, both the first heat exchanger 9 and the second heat exchanger 4 can be arranged indoors. Alternatively, the first heat exchanger 9 is arranged outdoors, and the second heat exchanger 4 is arranged indoors. The accumulator 6 can be arranged in the same space as the second heat exchanger 4.

[0070] The first pipe section and the second pipe section can be independent heat exchange pipes in the heat accumulator. The phase change temperature range of the energy storage medium is [10°C, 13°C], and energy is stored by absorbing energy and undergoing phase change.

[0071] In this embodiment, the first throttle component 7, the second throttle component 5 and the control valve 8 are all electronic expansion valves. In other embodiments, the first throttle component 7 and the second throttle component 5 can also be other throttle components such as a one-way throttle valve, and the control valve 8 can also be a solenoid valve.

[0072] During the operation of the heat pump system 200, the components of the first throttling component 7 and / or the second throttling component 5 that operate with a throttling opening can be determined according to the energy required to be stored in the current mode of the accumulator 6. When the accumulator 6 in the current mode needs to store cold energy, the throttling component located at the inlet of the first pipe section among the first throttling component 7 and the second throttling component 5 operates with a throttling opening; when the accumulator 6 in the current mode needs to store heat, the throttling component located at the outlet of the first pipe section among the first throttling component 7 and the second throttling component 5 operates with a throttling opening.

[0073] When the refrigerant flows from the second heat exchanger 4 to the first heat exchanger 9, when the second throttling component 5 operates at a throttling opening, the accumulator 6 can store the coldness of the refrigerant after throttling and depressurization by the second throttling component 5; when the second throttling component 5 operates at an opening greater than the throttling opening, the accumulator 6 stops storing coldness. When the first throttling component 7 operates at a throttling opening, the refrigerant flowing out of the accumulator 6 can be throttled and depressurized to ensure the evaporation effect of the first heat exchanger 9.

[0074] When the refrigerant flows from the first heat exchanger 9 to the second heat exchanger 4, when the first throttling component 7 operates at a throttling opening, the amount of cold stored in the accumulator 6 increases; when the first throttling component 7 operates at an opening greater than the throttling opening, the accumulator 6 can store the heat of the refrigerant flowing out of the first heat exchanger 9; the throttling operation of the second throttling component 5 can throttle and reduce the pressure of the refrigerant flowing out of the accumulator 6, thereby ensuring the evaporation effect of the second heat exchanger 4.

[0075] In the first implementation, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the second heat exchanger 4 are both connected to the exhaust port of the compressor 1, and the first heat exchanger 9 is connected to the return port of the compressor 1, and the refrigerant discharged from the compressor 1 can flow through the second heat exchanger 4, the accumulator 6, and the first heat exchanger 9 in sequence and then flow back to the compressor 1, wherein the first throttling component 7 and / or the second throttling component 5 can throttle and reduce the pressure of the refrigerant flowing through, the second heat exchanger 4 is in a condensing state, the first heat exchanger 9 is in an evaporating state, and the refrigerant exchanges heat with the accumulator 6 when flowing through the accumulator 6. Among them, when the control valve 8 is opened, the refrigerant discharged from the compressor 1 can flow into the refrigerant branch to exchange heat with the accumulator 6, and when the control valve 8 is closed, the refrigerant discharged from the compressor 1 can stop flowing into the refrigerant branch to exchange heat with the accumulator 6.

[0076] In the second implementation, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the second heat exchanger 4 are both connected to the return air port of the compressor 1, and the first heat exchanger 9 is connected to the exhaust port of the compressor 1, and the refrigerant discharged from the compressor 1 flows through the first heat exchanger 9, the accumulator 6, and the second heat exchanger 4 in sequence and then flows back to the compressor 1, wherein the first throttling component 7 and / or the second throttling component 5 can throttle and reduce the pressure of the refrigerant flowing through, the first heat exchanger 9 is in a condensing state, the second heat exchanger 4 is in an evaporating state, and the refrigerant exchanges heat with the accumulator 6 when flowing through the accumulator 6. wherein, when the control valve 8 is opened, the refrigerant flowing out of the first heat exchanger 9 can flow into the refrigerant branch to exchange heat with the accumulator 6, and when the control valve 8 is closed, the refrigerant flowing out of the first heat exchanger 9 can stop flowing into the refrigerant branch to exchange heat with the accumulator 6.

[0077] In the third implementation, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the first heat exchanger 9 are both connected to the exhaust port of the compressor 1, and the second heat exchanger 4 is connected to the return port of the compressor. A part of the refrigerant discharged from the compressor 1 flows through the first heat exchanger 9, the first throttling component 7, the accumulator 6, the second throttling component 5 and the second heat exchanger 4 in sequence and then flows back to the compressor 1. Another part of the refrigerant discharged from the compressor 1 can flow into the refrigerant branch and exchange heat with the accumulator 6, and then flow through the first throttling component 7, the accumulator 6, the second throttling component 5 and the second heat exchanger 4 in sequence and then flow back to the compressor 1. Among them, the first throttling component 7 and / or the second throttling component 5 can throttle and reduce the pressure of the refrigerant flowing through, the first heat exchanger 9 is in a condensing state, and the second heat exchanger 4 is in an evaporating state. When the control valve 8 is opened, the refrigerant flowing out of the compressor 1 can flow into the refrigerant branch to exchange heat with the accumulator 6. When the control valve 8 is closed, the refrigerant flowing out of the compressor 1 can stop flowing into the refrigerant branch to exchange heat with the accumulator 6.

[0078] In the fourth implementation, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the first heat exchanger 9 are both connected to the return air port of the compressor 1, and the second heat exchanger 4 is connected to the exhaust port of the compressor 1. The refrigerant discharged from the compressor 1 flows into the second heat exchanger 4 and the accumulator 6 in sequence, a part of the refrigerant flowing out of the accumulator 6 flows into the first heat exchanger 9 for heat exchange and then flows back to the compressor 1, and another part of the refrigerant flowing out of the accumulator 6 can flow into the refrigerant branch to further exchange heat with the accumulator 6. Among them, the first throttling component 7 and / or the second throttling component 5 can throttle and reduce the pressure of the refrigerant flowing through, the first heat exchanger 9 is in an evaporating state, and the second heat exchanger 4 is in a condensing state. When the control valve 8 is opened, a part of the refrigerant flowing out of the first pipe section can flow into the refrigerant branch to exchange heat with the accumulator 6, and when the control valve 8 is closed, the refrigerant flowing out of the first pipe section can stop flowing into the refrigerant branch to exchange heat with the accumulator 6.

[0079] The cooling mode is defined as a mode in which the target is to input coldness to the first heat exchanger 9. In the cooling mode, the first heat exchanger 9 is in an evaporating state and the second heat exchanger 4 is in a condensing state. In one implementation, the exhaust port of the compressor 1, the second heat exchanger 4, the second throttling component 5, the first pipe section, the first throttling component 7, the first heat exchanger 9, and the return air port of the compressor 1 are connected in sequence, the pipeline between the accumulator 6 and the first heat exchanger 9 (for example, the pipeline between the first throttling component 7 and the first heat exchanger 9) is connected to the first end of the refrigerant branch, and the second end of the refrigerant branch is connected to the exhaust port of the compressor 1. When the compressor 1 is started, the heat pump system 200 operates in the cooling mode. In another implementation, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the first heat exchanger 9 are both connected to the return air port of the compressor 1, and the second heat exchanger 4 is connected to the exhaust port of the compressor 1. When the compressor 1 is started, the heat pump system 200 operates in the cooling mode. When the heat pump system 200 continuously operates in the cooling mode, the cold in the refrigerant can be stored in the accumulator 6 through the coordinated operation of the control valve 8 and at least one of the first throttling component 7 and the second throttling component 5; when the heat pump system 200 starts the cooling mode again thereafter, the refrigerant can flow through the accumulator 6 for condensation in addition to condensation in the second heat exchanger 4 through the coordinated operation of the control valve 8 and at least one of the first throttling component 7 and the second throttling component 5, so that the system absorbs more cold when the cooling is started to achieve rapid cooling.

[0080] The heating mode is defined as a mode in which heat is input to the second heat exchanger 4 as the target. In the heating mode, the first heat exchanger 9 is in a condensing state and the second heat exchanger 4 is in an evaporating state. In one implementation, the exhaust port of the compressor 1, the first heat exchanger 9, the first throttling component 7, the first pipe section, the second throttling component 5, the second heat exchanger 4, and the return air port of the compressor 1 are connected in sequence, and the pipeline between the accumulator 6 and the first heat exchanger 9 (for example, the pipeline between the first throttling component 7 and the first heat exchanger 9) is connected to the first end of the refrigerant branch, and the second end of the refrigerant branch is connected to the return air port of the compressor 1. When the compressor 1 is started, the heat pump system 200 operates in the heating mode. In another implementation, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, and the second end of the refrigerant branch and the first heat exchanger 9 are both connected to the exhaust port of the compressor 1, and the second heat exchanger 4 is connected to the return air port of the compressor. When the compressor 1 is started, the heat pump system 200 operates in the heating mode. When the heat pump system 200 continuously operates in the heating mode, the heat in the refrigerant can be stored in the accumulator 6 through the coordinated operation of the control valve 8 and at least one of the first throttling component 7 and the second throttling component 5; when the heat pump system 200 starts the heating mode again thereafter, the refrigerant can flow through the accumulator 6 for evaporation in addition to evaporation in the second heat exchanger 4 through the coordinated operation of the control valve 8 and at least one of the first throttling component 7 and the second throttling component 5, so that the system absorbs more heat when the heating is started to achieve rapid heating.

[0081] In other implementations, the second throttle component 5 may be provided without the first throttle component 7 .

[0082] In this embodiment, an accumulator 6 is provided in the heat pump system 200, and the first pipe section between the indoor heat exchanger and the outdoor heat exchanger and the second pipe section on the refrigerant branch are both connected to the energy storage medium in the accumulator 6 for heat exchange. During the continuous operation of the heat pump system 200 for cooling or heating, the corresponding energy can be stored in the energy storage medium by adjusting the control valve 8, the first throttling component 7 and the second throttling component 5. When the heat pump system 200 is started for cooling or heating, the control valve 8, the first throttling component 7 and the second throttling component 5 can be adjusted to allow the refrigerant to flow through the refrigerant branch to absorb the energy required for cooling or heating from the energy storage medium. Based on this, the heat pump system 200 can be quickly cooled or heated when it is started, thereby effectively improving the heat exchange efficiency when the heat pump system 200 is started.

[0083] Further, in one embodiment, referring to Figure 1 The control valve 8 is arranged between the first end of the refrigerant branch and the second pipe section.

[0084] Based on this, when the heat pump system 200 is started, the refrigerant flows from the first heat exchanger 9 to the second heat exchanger 4, and the second end of the refrigerant branch is connected to the return air port of the compressor 1, the control valve 8 can be throttled to throttle and reduce the pressure of the refrigerant before flowing into the second pipe section for evaporation, thereby further increasing the heat absorbed by the refrigerant in the accumulator 6, so as to further improve the heating start-up effect of the heat pump system 200.

[0085] Further, in one embodiment, referring to Figure 1 , the heat pump system 200 further includes a flow direction switching component, the first heat exchanger 9, the second heat exchanger 4, the exhaust port of the compressor 1, the return air port of the compressor 1 and the second end of the refrigerant branch are all connected to the flow direction switching component;

[0086] When the flow direction switching assembly is in the first state, the second end of the refrigerant branch and the second heat exchanger 4 are both connected to the exhaust port of the compressor 1, and the first heat exchanger 9 is connected to the return air port of the compressor 1;

[0087] When the flow direction switching component is in the second state, the second end of the refrigerant branch and the second heat exchanger 4 are both connected to the return air port of the compressor 1, and the first heat exchanger 9 is connected to the exhaust port of the compressor 1.

[0088] When the flow switching component is in the first state, the heat pump system 200 is in the cooling mode, and the refrigerant discharged from the compressor 1 can flow through the second heat exchanger 4, the accumulator 6, and the first heat exchanger 9 in sequence and then flow back to the compressor 1. When the second throttling component 5 is in throttling and pressure reduction operation and the control valve 8 is closed, the accumulator 6 can store the coldness flowing through the refrigerant; in the cooling mode, the second heat exchanger 4 is in a condensing state and the first heat exchanger 9 is in an evaporating state. When the control valve 8 is opened, the refrigerant discharged from the compressor 1 can flow through the accumulator 6 to absorb the coldness stored therein. Among them, the control valve 8 can be opened when the cooling mode is started, and the control valve 8 can be closed when the cooling mode is continuously running.

[0089] When the flow switching component is in the second state, the heat pump system 200 is in the heating mode, and the refrigerant discharged from the compressor 1 can flow through the first heat exchanger 9, the accumulator 6, and the second heat exchanger 4 in sequence and then flow back to the compressor 1. When the second throttling component 5 operates in throttling and pressure reduction, the first throttling component 7 operates with an opening greater than the throttling opening, or the first throttling component 7 is not provided, and the control valve 8 is closed, the accumulator 6 can store the heat flowing through the refrigerant, the first heat exchanger 9 is in a condensing state, and the second heat exchanger 4 is in an evaporating state. When the control valve 8 is opened, the refrigerant flowing out of the first heat exchanger 9 can flow through the accumulator 6 to absorb the heat stored therein. Among them, the control valve 8 can be opened when the heating mode is started, and the control valve 8 can be closed when the heating mode is continuously operated.

[0090] In this embodiment, by setting the flow direction switching component, the heat pump system 200 can be switched between the cooling mode and the heating mode, and further cooperate with the control valve 8, the first throttling component 7 and / or the second throttling component 5 to ensure that the heat pump system 200 can achieve rapid cooling when the cooling mode is started and rapid heating when the heat pump system 200 starts the heating mode.

[0091] In other embodiments, in addition to the first state and / or the second state described above, the flow direction switching component may also have other operating states, specifically including but not limited to at least one of the following:

[0092] When the flow switching component is in the third state, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the first heat exchanger 9 are connected to the return air port of the compressor 1, and the second heat exchanger 4 is connected to the exhaust port of the compressor 1.

[0093] When the flow switching assembly is in the fourth state, the pipeline between the accumulator 6 and the first heat exchanger 9 is connected to the first end of the refrigerant branch, the second end of the refrigerant branch and the first heat exchanger 9 are both connected to the exhaust port of the compressor 1, and the second heat exchanger 4 is connected to the return air port of the compressor.

[0094] Further, in this embodiment, referring to Figure 1 , the flow direction switching component comprises:

[0095] A first reversing assembly 3, the exhaust port of the compressor 1, the return air port of the compressor 1 and the second heat exchanger 4 are all connected to the first reversing assembly 3;

[0096] The second reversing component 2 , the exhaust port of the compressor 1 , the return air port of the compressor 1 , the second end of the refrigerant branch, and the first heat exchanger 9 are all connected to the second reversing component 2 .

[0097] In this embodiment, the first reversing component 3 is a four-way valve, and the second reversing component 2 is a three-way valve. In other embodiments, the first reversing component 3 and the second reversing component 2 may both be four-way valves, or the first reversing component 3 includes more than one three-way valve or more than one solenoid valve, and so on.

[0098] The first reversing assembly 3 has a first operating position and a second operating position. When the first reversing assembly 3 operates in the first operating position, the exhaust port of the compressor 1 is connected to the second heat exchanger 4, and the return air port of the compressor 1 is blocked from the second heat exchanger 4; when the first reversing assembly 3 operates in the second operating position, the exhaust port of the compressor 1 is blocked from the first heat exchanger 4, and the return air port of the compressor 1 is connected to the second heat exchanger 4.

[0099] The second reversing component 2 has a third operating position and a fourth operating position. When the second reversing component 2 operates in the third operating position, the exhaust port of the compressor 1 is connected to the first heat exchanger 9, the return air port of the compressor 1 is blocked from the first heat exchanger 9, the second end of the refrigerant branch is blocked from the exhaust port of the compressor 1, and the second end of the refrigerant branch is connected to the return air port of the compressor 1; when the second reversing component 2 operates in the fourth operating position, the exhaust port of the compressor 1 is connected to the second end of the refrigerant branch, the exhaust port of the compressor 1 is blocked from the first heat exchanger 9, the return air port of the compressor 1 is blocked from the second end of the refrigerant branch, and the return air port of the compressor 1 is connected to the first heat exchanger 9.

[0100] The first state of the flow direction switching assembly includes the first operating position of the first reversing assembly 3 and the fourth operating position of the second reversing assembly 2 .

[0101] The second state of the flow direction switching assembly includes the second operating position of the first reversing assembly 3 and the third operating position of the second reversing assembly 2 .

[0102] In this embodiment, through the cooperation of the first reversing component 3 and the second reversing component 2, the cooling mode, the heating mode and the effective switching of the refrigerant flow direction in the refrigerant branch can be realized, thereby further ensuring that the heat pump system 200 achieves rapid cooling and rapid heating.

[0103] In other embodiments, the second reversing assembly 2 also has a fifth operating position and / or a sixth operating position. When the second reversing assembly 2 operates in the fifth operating position, the first heat exchanger 9 and the second end of the refrigerant branch are both connected to the exhaust port of the compressor 1, and the second end of the refrigerant branch and the first heat exchanger 9 are both blocked from the return air port of the compressor 1; when the second reversing assembly 2 operates in the sixth operating position, the first heat exchanger 9 and the second end of the refrigerant branch are both blocked from the exhaust port of the compressor 1, and the second end of the refrigerant branch and the first heat exchanger 9 are both connected to the return air port of the compressor 1. The third state of the flow switching assembly includes the second operating position of the first reversing assembly 3 and the fifth operating position of the second reversing assembly 2. The fourth state of the flow switching assembly includes the first operating position of the first reversing assembly 3 and the sixth operating position of the second reversing assembly 2.

[0104] The embodiment of the present invention further provides an air conditioner, which may include any air conditioner such as a multi-split air conditioner, a mobile air conditioner, a wall-mounted air conditioner, a cabinet air conditioner, etc.

[0105] In the embodiment of the present invention, refer to Figure 2 The air conditioner includes the above-mentioned heat pump system 200 and the control device 100, and the heat pump system 200 is connected to the control device 100.

[0106] Furthermore, in this embodiment, the air conditioner may further include a temperature sensor 01, which is connected to the control device 100. The temperature sensor 01 is disposed in the energy storage medium of the energy accumulator 6 to detect the temperature of the energy storage medium.

[0107] In the embodiment of the present invention, refer to Figure 2 The control device 100 of the heat pump system includes: a processor 1001, such as a CPU, a memory 1002, and a timer 1003. Among them, these components are connected and communicated 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.

[0108] Those skilled in the art will understand that Figure 2 The device structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0109] like Figure 2 As shown, the memory 1002 as a computer storage medium may include a control program for the heat pump system.

[0110] exist Figure 2 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 step operations of the control method of the heat pump system in the following embodiment.

[0111] The embodiment of the present invention further provides a control method for a heat pump system, which is applied to the above-mentioned heat pump system 200 .

[0112] Reference Figure 3 , an embodiment of a control method of a heat pump system of the present application is proposed. In this embodiment, the control method of the heat pump system includes:

[0113] Step S10, obtaining the operation stage of the heat pump system 200;

[0114] In one implementation, the startup duration of the heat pump system 200 is obtained, and the operation stage is determined according to the startup duration. When the startup duration is less than a preset duration, the operation stage is the startup stage; when the startup duration is greater than or equal to the preset duration, the operation stage is the continuous operation stage.

[0115] In another implementation, the temperature characteristic parameters of the energy storage medium in the energy accumulator 6 are obtained, and the operation stage is determined according to the temperature characteristic parameters of the energy storage medium. For example, when the temperature change value of the energy storage medium after the heat pump system 200 is started is greater than or equal to a preset threshold, the operation stage is determined to be the continuous operation stage; when the temperature change value of the energy storage medium after the heat pump system 200 is started is less than the preset threshold, the operation stage is determined to be the start-up operation stage.

[0116] In another implementation, the heat exchanger temperature of the first heat exchanger 9 and / or the second heat exchanger 4 is obtained, and the startup stage is determined according to the heat exchanger temperature. When the temperature of the heat exchanger in the evaporation state of the first heat exchanger 9 and the second heat exchanger 4 is higher than the first temperature threshold, the operation stage is the startup stage; when the temperature of the heat exchanger in the evaporation state of the first heat exchanger 9 and the second heat exchanger 4 is less than or equal to the first temperature threshold, the operation stage is the continuous operation stage. When the temperature of the heat exchanger in the condensation state of the first heat exchanger 9 and the second heat exchanger 4 is lower than the second temperature threshold, the operation stage is the startup stage; when the temperature of the heat exchanger in the condensation state of the first heat exchanger 9 and the second heat exchanger 4 is greater than or equal to the second temperature threshold, the operation stage is the continuous operation stage.

[0117] Step S20, when the operation stage is the start-up stage of the heat exchange mode, controlling the control valve 8 to operate, and controlling the first throttling component 7 and / or the second throttling component 5 to operate, so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator 6;

[0118] The startup phase is specifically the initial phase of operation after the compressor 1 of the heat pump system 200 is started. When the compressor 1 is started, the control valve 8 may be switched from a closed state to an open state.

[0119] The heat exchange mode of the heat pump system 200 includes a cooling mode or a heating mode. In the cooling mode, the first heat exchanger 9 is in an evaporating state and the second heat exchanger 4 is in a condensing state. In the heating mode, the first heat exchanger 9 is in a condensing state and the second heat exchanger 9 is in an evaporating state. When the current heat exchange mode is the cooling mode, the corresponding energy is cold; when the current heat exchange mode is the heating mode, the corresponding energy is heat.

[0120] When the heat exchange mode is the heating mode, the first heat exchanger 9 is in a condensing state, and the accumulator 6 stores heat. In one implementation, the control valve 8 can be operated at a throttling opening when it is located on the refrigerant inflow side of the second pipe section, so that the refrigerant flowing into the accumulator 6 can evaporate in the second pipe section, and the refrigerant can absorb the heat in the accumulator 6 to improve the heating effect. Among them, the first throttling component 7 can be operated at an opening greater than the throttling opening or at a throttling opening. When the first throttling component 7 is operated at a throttling opening, the refrigerant can also evaporate in the first pipe section to absorb the heat in the accumulator 6, thereby further improving the heating effect. In another implementation, the second end of the refrigerant branch is connected to the exhaust port of the compressor 1, the control valve 8 can be closed, and the first throttling component 7 can be operated at a throttling opening, so that the refrigerant flowing into the accumulator 6 can evaporate in the first pipe section, and the refrigerant can absorb the heat in the accumulator 6 to improve the heating effect. Furthermore, when the heat pump system is provided with a second throttling component 5, the second throttling component 5 can be controlled to operate at a throttling opening to improve the evaporation effect of the second heat exchanger 4, thereby further improving the heating effect of the system.

[0121] When the heat exchange mode is the cooling mode, the first heat exchanger 9 is in an evaporation state, and the accumulator 6 stores cold energy. In one implementation, the control valve 8 is opened so that the refrigerant flowing into the accumulator 6 can be condensed in the second pipe section, and the refrigerant can absorb the cold energy in the accumulator 6 to improve the cooling effect. Among them, the second throttling component 5 can be operated with an opening greater than the throttling opening, and the refrigerant can also be condensed in the first pipe section to absorb the cold energy in the accumulator 6, so as to further improve the cooling effect. In another implementation, the second end of the refrigerant branch is connected to the return air port of the compressor 1, the control valve 8 can be closed, and the second throttling component 7 can be operated with an opening greater than the throttling opening, so that the refrigerant flowing into the accumulator 6 can be condensed in the first pipe section, and the refrigerant can absorb the cold energy in the accumulator 6 to improve the cooling effect. Further, when the heat pump system is provided with the first throttling component 7, the first throttling component 7 can be controlled to operate with the throttling opening to improve the evaporation effect of the first heat exchanger 9, so as to further improve the cooling effect of the system.

[0122] Step S30, when the operation stage is the continuous operation stage of the heat exchange mode, control the control valve 8 to operate, and control the first throttling component 7 and / or the second throttling component 5 to operate, so that the accumulator 6 stores energy corresponding to the current heat exchange mode.

[0123] The continuous operation phase is the operation phase of the air conditioner after the start-up phase is completed.

[0124] When the refrigerant flows from the second heat exchanger 4 to the first heat exchanger 9, the second throttling component 5 operates at a throttling opening, and the accumulator 6 can store the coldness of the refrigerant after throttling and depressurization by the second throttling component 5; when the second throttling component 5 operates at an opening greater than the throttling opening, the accumulator 6 stops storing coldness. When the first throttling component 7 operates at a throttling opening, the refrigerant flowing out of the accumulator 6 can be throttled and depressurized to ensure the evaporation effect of the first heat exchanger 9. In this process, when the refrigerant branch is connected to the exhaust port of the compressor 1, the control valve 8 is closed, and all the coldness in the accumulator 6 is absorbed from the refrigerant after throttling and depressurization by the second throttling component 5; when the refrigerant branch is connected to the return air port of the compressor 1 or blocked from the exhaust port of the compressor 1, the control valve 8 can be opened or closed. When the control valve 8 is opened and the first throttling component 7 operates at a throttling, the coldness stored in the accumulator 6 can be absorbed from the refrigerant after throttling and depressurization in the first throttling component 7 and the second throttling component 5, respectively.

[0125] When the refrigerant flows from the first heat exchanger 9 to the second heat exchanger 4, the first throttling component 7 operates at a throttling opening, and the cold amount stored in the accumulator 6 increases; when the first throttling component 7 operates at an opening greater than the throttling opening, the accumulator 6 can store the heat of the refrigerant flowing out of the first heat exchanger 9; the throttling operation of the second throttling component 5 can throttle and reduce the pressure of the refrigerant flowing out of the accumulator 6 to ensure the evaporation effect of the second heat exchanger 4. In this process, when the refrigerant branch is connected to the exhaust port of the compressor 1 or blocked from the return port of the compressor 1, the control valve 8 can be opened or closed. When the control valve 8 is opened, the heat stored in the accumulator 6 can be absorbed from the refrigerant discharged from the first heat exchanger 9 and the compressor 1 respectively; when the refrigerant branch is connected to the return port of the compressor 1, the control valve 8 can be closed when it is arranged between the first end of the refrigerant branch and the accumulator 6, and can be opened at a throttling opening when the control valve 8 is arranged between the second end of the refrigerant branch and the accumulator 6.

[0126] During the operation of the heat pump system 200, the operation of the first throttling component 7 and / or the second throttling component 5 with throttling and pressure reduction can be determined according to the energy required to be stored in the current mode of the accumulator 6. When the accumulator 6 needs to store cold energy in the current mode, the throttling component located at the inlet of the accumulator 6 among the first throttling component 7 and the second throttling component 5 is operated with a throttling opening; when the accumulator 6 needs to store heat in the current mode, the throttling component located at the outlet of the accumulator 6 among the first throttling component 7 and the second throttling component 5 is operated with a throttling opening.

[0127] The cooling mode is defined as a mode whose goal is to input cold energy into the first heat exchanger 9. In the cooling mode, the first heat exchanger 9 is in an evaporating state and the second heat exchanger 4 is in a condensing state. When the heat pump system 200 continues to operate in the cooling mode, the cold energy in the refrigerant can be stored in the accumulator 6 by closing the control valve 8 and operating the first throttling component 7 and / or the second throttling component 5. When the heat pump system 200 starts the cooling mode again thereafter, the refrigerant can flow through the accumulator 6 for condensation in addition to condensing in the second heat exchanger 4 by opening the control valve 8, so that the system absorbs more cold energy when the cooling is started to achieve rapid cooling.

[0128] The heating mode is defined as a mode whose goal is to input heat to the second heat exchanger 4. In the heating mode, the first heat exchanger 9 is in a condensing state and the second heat exchanger 4 is in an evaporating state. When the heat pump system 200 continues to operate in the heating mode, the heat in the refrigerant can be stored in the accumulator 6 by closing the control valve 8 and operating the first throttling component 7 and / or the second throttling component 5; when the heat pump system 200 starts the heating mode again thereafter, by opening the control valve 8, the refrigerant can not only evaporate in the second heat exchanger 4 but also flow through the accumulator 6 for evaporation, so that the system absorbs more heat when the heating is started to achieve rapid heating.

[0129] Furthermore, after step S20, the execution may return to step S10, so that the energy in the previous operation process can be used to increase the heat exchange capacity of the system when the heat pump system 200 is started next time, thereby effectively improving the heat exchange efficiency of the heat pump system 200.

[0130] It should be noted that, when the heat pump system 200 is started for the first time, the energy accumulator 6 may store energy provided by other energy supply devices outside the heat pump system 200 ; or, the energy accumulator 6 may not store energy.

[0131] A control method for a heat pump system proposed in an embodiment of the present invention, when the heat pump system 200 is continuously running, the energy corresponding to the current heat exchange mode is stored in the accumulator 6 through the operation and coordination of the control valve 8, and the first throttling component 7 and / or the second throttling component 5, so that the heat pump system 200 can be provided with the required energy when it is started next time, thereby effectively improving the heat exchange efficiency of the heat pump system 200 when it is started; when the heat pump system 200 is started, the refrigerant can absorb the energy required for heat exchange in the current heat exchange mode from the accumulator 6 through the operation and coordination of the control valve 8, and the first throttling component 7 and / or the second throttling component 5, thereby effectively improving the heat exchange efficiency of the heat pump system 200 when it is started.

[0132] Further, based on the above embodiments, another embodiment of the control method of the heat pump system of the present application is proposed. In this embodiment, the heat pump system 200 further includes a flow direction switching component, and the first heat exchanger 9, the second heat exchanger 4, the exhaust port of the compressor 1, the suction port of the compressor 1, and the second end of the refrigerant branch are all connected to the flow direction switching component. The heat exchange mode includes a refrigeration mode or a heating mode. Refer to Figure 4 , after the step of obtaining the operation stage of the heat pump system, the method further includes:

[0133] Step S201, when the operation stage is the start-up stage of the refrigeration mode, control the flow direction switching component to operate in a first state, so that the second end of the refrigerant branch and the second heat exchanger 4 are both communicated with the exhaust port of the compressor 1, and the first heat exchanger 9 is communicated with the suction port of the compressor 1;

[0134] With reference to Figure 5 the refrigerant flow direction indicated by the arrow in, when the flow direction switching component is in the first state, the heat pump system 200 is in the refrigeration mode. The refrigerant discharged from the compressor 1 can flow through the second heat exchanger 4, the accumulator 6, and the first heat exchanger 9 in sequence and then return to the compressor 1. The second throttling component 5 and / or the first throttling component 7 operate with throttling and pressure reduction. The second heat exchanger 4 is in the condensation state, and the first heat exchanger 9 is in the evaporation state. When the control valve 8 is opened, the refrigerant discharged from the compressor 1 can flow through the accumulator 6 to absorb the stored cold energy therein.

[0135] The flow direction switching component includes the above-mentioned first commutation component 3 and the second commutation component 2. When the operation stage is the start-up stage of the refrigeration mode, control the first commutation component 3 to operate in a first operating position, and control the second commutation component 2 to operate in a fourth operating position.

[0136] There is no specific limitation on the execution sequence between the step of controlling the control valve 8 to operate and the step of controlling the first throttling component 7 and / or the second throttling component 5 to operate so that the refrigerant absorbs the energy corresponding to the current heat exchange mode from the accumulator 6 and the step of controlling the flow direction switching component to operate in the first state here.

[0137] Step S202, when the operation stage is the start-up stage of the heating mode, control the flow direction switching component to operate in a second state, so that the second end of the refrigerant branch and the second heat exchanger 4 are both communicated with the suction port of the compressor 1, and the first heat exchanger 9 is communicated with the exhaust port of the compressor 1.

[0138] With reference to Figure 6The refrigerant flow direction indicated by the middle arrow, when the flow direction switching component is in the second state, the heat pump system 200 is in the heating mode, the refrigerant discharged from the compressor 1 can flow through the first heat exchanger 9, the accumulator 6, and the second heat exchanger 4 in sequence and then flow back to the compressor 1, the second throttling component 5 and / or the first throttling component 7 throttling and reducing pressure operation, the first heat exchanger 9 is in the condensing state, the second heat exchanger 4 is in the evaporating state, and when the control valve 8 is opened, the refrigerant flowing out of the first heat exchanger 9 can flow through the accumulator 6 to absorb the heat stored therein.

[0139] The flow direction switching component includes the above-mentioned first reversing component 3 and second reversing component 2. When the operating stage is the startup stage of the heating mode, the first reversing component 3 is controlled to operate at the second operating position, and the second reversing component 2 is controlled to operate at the third operating position.

[0140] The steps of controlling the operation of the control valve 8, and controlling the operation of the first throttling component 7 and / or the second throttling component 5 so that the refrigerant absorbs the energy corresponding to the current heat exchange mode from the accumulator 6, and the step of controlling the flow switching component to operate in the second state here are not specifically limited in the order of execution.

[0141] In this embodiment, by setting the flow direction switching component, the heat pump system 200 can be switched between the cooling mode and the heating mode, and further cooperate with the control valve 8, the first throttling component 7 and / or the second throttling component 5 to ensure that the heat pump system 200 can achieve rapid cooling when the cooling mode is started and rapid heating when the heat pump system 200 starts the heating mode.

[0142] In other embodiments, during the startup phase of the cooling mode, the flow direction switching component may be controlled to operate in the third state; during the startup phase of the heating mode, the flow direction switching component may be controlled to operate in the fourth state.

[0143] 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 this embodiment, the flow direction switching component operates in the first state, and when the operation stage is the startup stage of the heat exchange mode, the step of controlling the control valve 8 to operate, and controlling the first throttling component 7 and / or the second throttling component 5 to operate so that the refrigerant absorbs the energy corresponding to the current heat exchange mode from the accumulator 6 includes: when the operation stage is the startup stage of the cooling mode, controlling the control valve 8 to open, controlling the first throttling component 7 to open with a throttling opening, and / or controlling the second throttling component 5 to open with an opening greater than the throttling opening.

[0144] In this embodiment, a first throttling component 7 is arranged between the first pipe section and the first heat exchanger 9, and a second throttling component 5 is arranged between the first pipe section and the second heat exchanger 4. When the operation stage is the startup stage of the refrigeration mode, the control valve 8 is controlled to open, the first throttling component 7 is controlled to open with a throttling opening, and the second throttling component 5 is controlled to open with an opening greater than the throttling opening.

[0145] Here, the opening degree greater than the throttle opening degree is the maximum opening degree of the second throttle component 5 .

[0146] The throttling opening of the first throttling component 7 can be a preset fixed opening, or can be determined according to the exhaust superheat of the system and / or the temperature of the energy storage medium in the accumulator 6 and / or the temperature difference between the inlet and outlet of the first heat exchanger 9.

[0147] In this embodiment, through the above-mentioned control, it can be achieved that when refrigeration is started, the accumulator 6 replenishes cold energy to the system without affecting the evaporation effect of the first heat exchanger 9, which is beneficial to quickly increase the cold energy input by the heat pump system 200 to the space where the first heat exchanger 9 is located when refrigeration is started, so as to further achieve rapid refrigeration.

[0148] Furthermore, in this embodiment, after step S201, the following steps are further included:

[0149] Obtain a first temperature of the energy storage medium in the accumulator 6; when the first temperature is lower than a first preset temperature, execute the steps of controlling the control valve 8 to open, controlling the first throttling component 7 to open with a throttling opening, and / or controlling the second throttling component 5 to open with an opening greater than the throttling opening; when the first temperature is greater than or equal to the first preset temperature, controlling the control valve 8 to close or remain closed.

[0150] The first temperature is specifically obtained by acquiring the temperature currently detected by the temperature sensor 01 .

[0151] The first preset temperature is specifically a temperature threshold value for distinguishing whether the energy stored in the accumulator 6 can improve the cooling effect when the system is started. The first preset temperature can be specifically determined according to the phase change temperature of the energy storage medium in the accumulator 6 and / or the ambient temperature of the current environment of the heat pump system 200.

[0152] When the first temperature is greater than or equal to the first preset temperature, it can be considered that the heat pump system 200 enters the continuous operation stage of the cooling mode.

[0153] In this embodiment, when the refrigeration is started, the control valve 8 is opened and the first throttling component 7 and the second throttling component 5 are adjusted only when the temperature in the accumulator 6 is low enough to supplement the system cooling capacity, allowing the refrigerant to enter the refrigerant branch for condensation; when the refrigeration is started, when the temperature in the accumulator 6 is not low enough to supplement the system cooling capacity, the control valve 8 is kept closed, prohibiting the refrigerant from entering the refrigerant branch for condensation. Based on this, the adverse effects of the accumulator 6 temperature being too high on the refrigeration effect can be avoided, further ensuring the rapid improvement of the refrigeration effect when the refrigeration is started.

[0154] Furthermore, in the present embodiment, after the steps of controlling the control valve 8 to open when the first temperature is lower than the first preset temperature, controlling the first throttling component 7 to open with a throttling opening and / or controlling the second throttling component 5 to open with an opening greater than the throttling opening, it also includes: when the start-up duration of the refrigeration mode reaches the first preset duration, or when the temperature of the energy storage medium in the accumulator 6 is greater than or equal to a second preset temperature, controlling the control valve 8 to close; wherein the second preset temperature is greater than or equal to the first preset temperature.

[0155] The startup duration of the cooling mode specifically refers to the duration during which the heat pump system 200 continuously operates from the startup time of the cooling mode to the current time.

[0156] When the startup duration of the cooling mode reaches a first preset duration, or when the temperature of the energy storage medium in the accumulator 6 is greater than or equal to a second preset temperature, it can be considered that the heat pump system 200 enters the continuous operation stage of the cooling mode.

[0157] In this embodiment, the second preset temperature is greater than the first preset temperature. For example, the first preset temperature is 27 degrees and the second preset temperature is 30 degrees.

[0158] In this embodiment, when the operation time of the refrigeration mode is long enough or the temperature of the energy storage medium rises to a sufficiently high temperature, it indicates that the system has achieved a better refrigeration effect or the accumulator 6 cannot achieve an improvement in the refrigeration effect. At this time, closing the control valve 8 is beneficial to further improve the refrigeration effect.

[0159] 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 this embodiment, the flow direction switching component operates in the second state, and when the operation stage is the start-up stage of the heat exchange mode, the steps of controlling the control valve 8 to operate, and controlling the first throttling component 7 and / or the second throttling component 5 to operate so that the refrigerant absorbs the energy corresponding to the current heat exchange mode from the accumulator 6 include:

[0160] When the operation stage is the startup stage of the heating mode, the control valve 8 is controlled to open, the first throttling component 7 is controlled to open with an opening greater than the throttling opening, and / or the second throttling component 5 is controlled to open with a throttling opening.

[0161] In this embodiment, a first throttling component 7 is arranged between the first pipe section and the first heat exchanger 9, and a second throttling component 5 is arranged between the first pipe section and the second heat exchanger 4, and the control valve 8 is controlled to open, the first throttling component 7 is controlled to open with an opening greater than the throttling opening, and the second throttling component 5 is controlled to open with a throttling opening.

[0162] Here, the opening degree greater than the throttle opening degree is the maximum opening degree of the first throttle component 7 .

[0163] The throttling opening of the second throttling component 5 can be a preset fixed opening, or can be determined according to the exhaust gas superheat of the system and / or the temperature of the energy storage medium in the accumulator 6 and / or the temperature difference between the inlet and outlet of the first heat exchanger 9.

[0164] In this embodiment, through the above-mentioned control, the temperature of the heat flowing from the first throttling component 7 to the accumulator 6 will not be too low when the heating is started, thereby ensuring that the heat stored in the accumulator 6 can be fully used for the evaporation of the refrigerant in the refrigerant branch, and at the same time will not affect the evaporation effect of the second heat exchanger 4, thereby ensuring that the second pipe section and the second evaporator can evaporate synchronously and efficiently, which is beneficial to quickly increase the heat input by the heat pump system 200 to the space where the first heat exchanger 9 is located when the heating is started, so as to further realize rapid heating.

[0165] Furthermore, in this embodiment, the control valve 8 is arranged between the first end of the refrigerant branch and the second pipe section, and the step of controlling the control valve 8 to open includes: when the operation stage is the startup stage of the heating mode, controlling the control valve 8 to open with a throttling opening.

[0166] Based on this, it is beneficial to improve the evaporation effect of the refrigerant in the second pipe section, so that the refrigerant can absorb more heat from the accumulator 6 during the heating startup phase, thereby further improving the heating effect during the heating startup.

[0167] Furthermore, in this embodiment, after step S202, the following steps are further included:

[0168] Obtain a second temperature of the energy storage medium in the accumulator 6; when the second temperature is greater than a third preset temperature, execute the steps of controlling the control valve 8 to open, controlling the first throttling component 7 to open with an opening greater than the throttling opening, and / or controlling the second throttling component 5 to open with a throttling opening; when the second temperature is less than or equal to the third preset temperature, controlling the control valve 8 to close or remain closed.

[0169] The second temperature is specifically obtained by acquiring the temperature currently detected by the temperature sensor 01 .

[0170] The third preset temperature is specifically a temperature threshold value for distinguishing whether the energy stored in the accumulator 6 can improve the heating effect when the system is started. The third preset temperature can be specifically determined according to the phase change temperature of the energy storage medium in the accumulator 6 and / or the ambient temperature of the current environment of the heat pump system 200.

[0171] When the second temperature is less than or equal to the third preset temperature, it can be considered that the heat pump system 200 enters the continuous operation stage of the heating mode.

[0172] In this embodiment, when the heating is started, the control valve 8 is opened only when the temperature in the accumulator 6 is high enough to supplement the system heat, allowing the refrigerant to enter the refrigerant branch to evaporate; when the temperature in the accumulator 6 is not high enough to supplement the system heat, the control valve 8 is kept closed, prohibiting the refrigerant from entering the refrigerant branch to evaporate. Based on this, the adverse effect of the accumulator 6 temperature being too low on the heating effect can be avoided, further ensuring the rapid improvement of the heating effect when the heating is started.

[0173] Furthermore, in the present embodiment, after the steps of controlling the control valve 8 to open when the second temperature is greater than the third preset temperature, controlling the first throttling component 7 to open with an opening greater than the throttling opening and / or controlling the second throttling component 5 to open with a throttling opening, it also includes: when the start-up duration of the heating mode reaches the second preset duration, or when the temperature of the energy storage medium in the accumulator 6 is less than or equal to a fourth preset temperature, controlling the control valve 8 to close; wherein the fourth preset temperature is less than or equal to the third preset temperature.

[0174] The startup duration of the heating mode specifically refers to the duration during which the heat pump system 200 continuously operates from the startup time of the heating mode to the current time.

[0175] When the start-up duration of the heating mode reaches the second preset duration, or when the temperature of the energy storage medium in the accumulator 6 is less than or equal to a fourth preset temperature, it can be considered that the heat pump system 200 enters the continuous operation stage of the heating mode.

[0176] In this embodiment, the fourth preset temperature is lower than the third preset temperature. For example, the third preset temperature is 5 degrees, and the fourth preset temperature is 2 degrees.

[0177] In this embodiment, when the operation time of the heating mode is long enough or the temperature of the energy storage medium rises to a sufficiently high temperature, it indicates that the system has achieved a better heating effect or the accumulator 6 cannot achieve the improvement of the heating effect. At this time, closing the control valve 8 is beneficial to further improve the heating effect.

[0178] Further, based on any of the above embodiments, in this embodiment, the flow direction switching component operates in a first state, a first throttling component 7 is arranged between the first pipe section and the first heat exchanger 9, and a second throttling component 5 is arranged between the first pipe section and the second heat exchanger 4, and the steps of controlling the operation of the control valve 8 and controlling the operation of the first throttling component 7 and / or the second throttling component 5 so that the accumulator 6 stores energy corresponding to the current heat exchange mode include: when the heat pump system 200 is in the continuous operation stage of the cooling mode, obtaining the first energy storage medium in the accumulator 6; Three temperatures; when the third temperature is lower than the fifth preset temperature, the control valve 8 is controlled to be closed, the first throttling component 7 is controlled to be opened with a throttling opening, and the second throttling component 5 is controlled to be opened with an opening greater than the throttling opening; when the third temperature is greater than or equal to the fifth preset temperature, the control valve 8 is controlled to be closed, and the second throttling component 5 is controlled to be opened with a throttling opening; wherein, the refrigeration mode corresponds to the second end of the refrigerant branch and the second heat exchanger 4 being connected to the exhaust port of the compressor 1, and the first heat exchanger 9 being connected to the return air port of the compressor 1.

[0179] The third temperature is specifically obtained by acquiring the temperature currently detected by the temperature sensor 01 .

[0180] The fifth preset temperature may be a preset fixed temperature, or may be a temperature determined according to the actual operation of the heat pump system 200 , for example, may be determined according to the ambient temperature of the environment where the heat pump system 200 is located.

[0181] When the third temperature is lower than the fifth preset temperature, it indicates that the cold stored in the accumulator 6 is too much and will affect the evaporation effect of the first heat exchanger 9; when the third temperature is greater than or equal to the fifth preset temperature, it indicates that the cold stored in the accumulator 6 cannot meet the rapid cooling when the heat pump system 200 starts cooling again.

[0182] In this embodiment, when the second throttle component 5 is opened at a throttle opening, the first throttle component 7 can be opened at a throttle opening, and the throttle opening of the first throttle component 7 can be determined according to the temperature change value of the energy storage medium in the energy storage device. In other embodiments, the first throttle component 7 can also be operated at an opening greater than the throttle opening.

[0183] Combined with reference Figure 7The refrigerant flow direction indicated by the middle arrow, when the flow direction switching component is in the first state, the heat pump system 200 is in the cooling mode, the control valve 8 is in the closed state, the refrigerant discharged from the compressor 1 can flow through the second heat exchanger 4, the accumulator 6, and the first heat exchanger 9 in sequence and then flow back to the compressor 1, and when the second throttling component 5 operates at a throttling opening, the accumulator 6 can store the coldness flowing through the refrigerant; when the second throttling component 5 operates at a greater than throttling opening, the accumulator 6 stops storing coldness. In the cooling mode, the second heat exchanger 4 is in a condensing state, and the first heat exchanger 9 is in an evaporating state.

[0184] In this embodiment, through the above control, it can be ensured that the cold amount stored in the accumulator 6 can ensure rapid cooling when the heat pump system 200 starts cooling again, while ensuring the evaporation effect of the first heat exchanger 9 in the current cooling mode, so as to further improve the cooling effect of the air conditioner.

[0185] Further, based on any of the above embodiments, in this embodiment, the flow direction switching component operates in a second state, a first throttling component 7 is arranged between the first pipe section and the first heat exchanger 9, and a second throttling component 5 is arranged between the first pipe section and the second heat exchanger 4, and the steps of controlling the operation of the control valve 8 and controlling the operation of the first throttling component 7 and / or the second throttling component 5 so that the accumulator 6 stores energy corresponding to the current mode include: when the heat pump system 200 is in the continuous operation stage of the heating mode, controlling the control valve 8 to close, controlling the first throttling component 7 to open with an opening greater than the throttling opening, and controlling the second throttling component 5 to open with a throttling opening; wherein, the heating mode corresponds to the second end of the refrigerant branch and the second heat exchanger 4 being connected to the return air port of the compressor 1, and the first heat exchanger 9 being connected to the exhaust port of the compressor 1.

[0186] Combined with reference Figure 8 The refrigerant flow direction indicated by the middle arrow, when the flow direction switching component is in the second state, the heat pump system 200 is in the heating mode, the control valve 8 is in the closed state, the refrigerant discharged from the compressor 1 can flow through the first heat exchanger 9, the accumulator 6, and the second heat exchanger 4 in sequence and then flow back to the compressor 1, the first throttling component 7 does not throttle, at this time the refrigerant condenses in the first heat exchanger 9 and the accumulator 6 in sequence, the accumulator 6 can absorb the heat flowing through the refrigerant, and the refrigerant flowing out of the accumulator 6 can further pass through the second throttling component 5 for throttling and pressure reduction to ensure the evaporation effect of the second heat exchanger 4. In the heating mode, the first heat exchanger 9 is in the condensing state, and the second heat exchanger 4 is in the evaporating state.

[0187] In this embodiment, through the above-mentioned method, the system heat can be effectively stored in the accumulator 6, so as to achieve rapid heating when the heat pump system 200 is started again for heating.

[0188] In addition, an embodiment of the present invention further proposes a storage medium, on which a control program of a heat pump system is stored. When the control program of the heat pump system is executed by a processor, the relevant steps of any embodiment of the control method of the heat pump system are implemented.

[0189] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0190] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0191] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, including a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, a heat pump system 200, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0192] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat pump system, It is characterized in that The heat pump system comprises a compressor, an accumulator, a refrigerant main circuit and a refrigerant branch circuit, wherein the refrigerant main circuit comprises a first heat exchanger and a second heat exchanger connected by a pipeline, and the refrigerant branch circuit comprises a control valve, and the control valve is used to control the conduction, cutoff and opening degree of the refrigerant branch circuit; The first pipe section between the first heat exchanger and the second heat exchanger and the second pipe section on the refrigerant branch are both connected to the energy storage medium in the accumulator for heat exchange, and a first throttling component is provided between the first pipe section and the first heat exchanger and / or a second throttling component is provided between the first pipe section and the second heat exchanger; The pipeline between the accumulator and the first heat exchanger is connected to the first end of the refrigerant branch; the second end of the refrigerant branch is connected to the exhaust port of the compressor, or the second end of the refrigerant branch is connected to the return air port of the compressor; the second heat exchanger is connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return air port of the compressor, or the second heat exchanger is connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

2. The heat pump system according to claim 1, It is characterized in that The control valve is arranged between the first end of the refrigerant branch and the second pipe section.

3. The heat pump system according to claim 1 or 2, It is characterized in that The heat pump system further includes a flow direction switching component, and the first heat exchanger, the second heat exchanger, the exhaust port of the compressor, the return port of the compressor, and the second end of the refrigerant branch are all connected to the flow direction switching component; When the flow direction switching assembly is in the first state, the second end of the refrigerant branch and the second heat exchanger are both connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return port of the compressor; When the flow direction switching component is in the second state, the second end of the refrigerant branch and the second heat exchanger are both connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

4. The heat pump system according to claim 3, It is characterized in that The flow direction switching component comprises: A first reversing assembly, the exhaust port of the compressor, the return air port of the compressor and the second heat exchanger are all connected to the first reversing assembly; A second reversing component, the exhaust port of the compressor, the return port of the compressor, the second end of the refrigerant branch, and the first heat exchanger are all connected to the second reversing component.

5. A control method for a heat pump system, It is characterized in that Applied to the heat pump system according to any one of claims 1 to 4, the control method of the heat pump system further comprises the following steps: Obtaining the operation stage of the heat pump system; When the operation stage is the start-up stage of the heat exchange mode, the control valve is controlled to operate, and the first throttling component and / or the second throttling component are controlled to operate, so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator; When the operation stage is the continuous operation stage of the heat exchange mode, the control valve is controlled to operate, and the first throttling component and / or the second throttling component are controlled to operate, so that the accumulator stores energy corresponding to the current heat exchange mode.

6. The control method of the heat pump system according to claim 5, It is characterized in that The heat pump system further includes a flow direction switching component, the first heat exchanger, the second heat exchanger, the exhaust port of the compressor, the return port of the compressor, and the second end of the refrigerant branch are all connected to the flow direction switching component, the heat exchange mode includes a cooling mode or a heating mode, and after the step of obtaining the operation stage of the heat pump system, it also includes: When the operation stage is the startup stage of the cooling mode, the flow direction switching component is controlled to operate in a first state, so that the second end of the refrigerant branch and the second heat exchanger are both connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return air port of the compressor; When the operation stage is the startup stage of the heating mode, the flow switching component is controlled to operate in the second state so that the second end of the refrigerant branch and the second heat exchanger are connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

7. The control method of the heat pump system according to claim 6, It is characterized in that When the operation stage is the start-up stage of the heat exchange mode, the step of controlling the control valve to operate, and controlling the first throttling component and / or the second throttling component to operate, so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator includes: When the operation stage is the startup stage of the cooling mode, the control valve is controlled to open, the first throttling component is controlled to open with a throttling opening, and / or the second throttling component is controlled to open with an opening greater than the throttling opening.

8. The control method of the heat pump system according to claim 7, It is characterized in that When the operation stage is the startup stage of the cooling mode, after the step of controlling the flow direction switching component to operate in the first state, the method further includes: Acquiring a first temperature of an energy storage medium in the energy accumulator; When the first temperature is lower than a first preset temperature, executing the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening; When the first temperature is greater than or equal to the first preset temperature, the control valve is controlled to close or remain closed.

9. The control method of the heat pump system according to claim 8, It is characterized in that After the step of controlling the control valve to open when the first temperature is lower than the first preset temperature, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening, the method further includes: When the start-up time of the refrigeration mode reaches a first preset time, or when the temperature of the energy storage medium in the accumulator is greater than or equal to a second preset temperature, controlling the control valve to close; Wherein, the second preset temperature is greater than or equal to the first preset temperature.

10. The control method of the heat pump system according to claim 6, It is characterized in that When the operation stage is the start-up stage of the heat exchange mode, the step of controlling the control valve to operate, and controlling the first throttling component and / or the second throttling component to operate, so that the refrigerant absorbs energy corresponding to the current heat exchange mode from the accumulator includes: When the operation stage is the start-up stage of the heating mode, the control valve is controlled to open, the first throttling component is controlled to open with an opening greater than the throttling opening, and / or the second throttling component is controlled to open with a throttling opening.

11. The control method of the heat pump system according to claim 10, It is characterized in that When the operation stage is the start-up stage of the heating mode, after the step of controlling the flow direction switching component to operate in the second state, the method further includes: acquiring a second temperature of the energy storage medium in the energy accumulator; When the second temperature is greater than a third preset temperature, executing the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening; When the second temperature is less than or equal to the third preset temperature, the control valve is controlled to close or remain closed.

12. The control method of the heat pump system according to claim 10, It is characterized in that After the step of controlling the control valve to open, controlling the first throttling component to open at a throttling opening, and / or controlling the second throttling component to open at an opening greater than the throttling opening when the second temperature is greater than the third preset temperature, the method further includes: When the start-up time of the heating mode reaches a second preset time, or when the temperature of the energy storage medium in the accumulator is less than or equal to a fourth preset temperature, controlling the control valve to close; Wherein, the fourth preset temperature is less than or equal to the third preset temperature.

13. The control method of the heat pump system according to claim 10, It is characterized in that The control valve is disposed between the first end of the refrigerant branch and the second pipe section, and the step of controlling the control valve to open includes: When the operation stage is a start-up stage of the heating mode, the control valve is controlled to open with a throttling opening.

14. The control method of the heat pump system according to any one of claims 6 to 13, It is characterized in that A first throttling component is arranged between the first pipe section and the first heat exchanger, and a second throttling component is arranged between the first pipe section and the second heat exchanger. The step of controlling the operation of the control valve and controlling the operation of the first throttling component and / or the second throttling component so that the accumulator stores energy corresponding to the current heat exchange mode comprises: When the heat pump system is in a continuous operation stage of a cooling mode, obtaining a third temperature of the energy storage medium in the energy accumulator; When the third temperature is lower than a fifth preset temperature, the control valve is controlled to be closed, the first throttling component is controlled to be opened at a throttling opening, and the second throttling component is controlled to be opened at an opening greater than the throttling opening; When the third temperature is greater than or equal to the fifth preset temperature, the control valve is controlled to be closed, and the second throttling component is controlled to be opened at a throttling opening; Wherein, the cooling mode corresponds to that the second end of the refrigerant branch and the second heat exchanger are both connected to the exhaust port of the compressor, and the first heat exchanger is connected to the return air port of the compressor.

15. The control method of the heat pump system according to any one of claims 6 to 13, It is characterized in that A first throttling component is arranged between the first pipe section and the first heat exchanger, and a second throttling component is arranged between the first pipe section and the second heat exchanger. The step of controlling the operation of the control valve and controlling the operation of the first throttling component and / or the second throttling component so that the accumulator stores energy corresponding to the current heat exchange mode comprises: When the heat pump system is in the continuous operation stage of the heating mode, the control valve is controlled to be closed, the first throttling component is controlled to be opened with an opening greater than the throttling opening, and the second throttling component is controlled to be opened with the throttling opening; Wherein, the heating mode corresponds to that the second end of the refrigerant branch and the second heat exchanger are both connected to the return air port of the compressor, and the first heat exchanger is connected to the exhaust port of the compressor.

16. An air conditioner, It is characterized in that The air conditioner comprises a control device and a heat pump system as claimed in any one of claims 1 to 4, wherein the control device is connected to the heat pump system; The control device includes: a memory, a processor, and a control program of the heat pump system stored in the memory and executable on the processor. When the control program of the heat pump system is executed by the processor, the steps of the control method of the heat pump system as described in any one of claims 5 to 15 are implemented.

17. A storage medium, It is characterized in that The storage medium stores a control program of the heat pump system, and when the control program of the heat pump system is executed by the processor, the steps of the control method of the heat pump system according to any one of claims 5 to 15 are implemented.

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