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

Abstract

The application discloses a kind of control method of heat pump system, heat pump system and storage medium.Therein, heat pump system includes compression mechanism, first heat exchanger, air supplement branch and second heat exchanger, compression mechanism includes first compression cylinder and second compression cylinder, the exhaust port of first compression cylinder is communicated with the suction port of second compression cylinder, the first flow path between first heat exchanger and second heat exchanger is communicated with one end of air supplement branch, the second flow path between first compression cylinder and second compression cylinder is communicated with the other end of air supplement branch, air supplement branch is provided with regulating valve, the method includes: obtaining intermediate pressure between first compression cylinder and second compression cylinder;According to intermediate pressure, determine the target suction temperature of second compression cylinder;According to the current suction temperature and target suction temperature of second compression cylinder, control regulating valve adjustment opening degree.The application aims at improving the energy efficiency of heat pump system using double-stage compression.

Description

TECHNICAL FIELD

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

[0002] In a dual-stage compression air conditioning system, a first compression cylinder and a second compression cylinder are arranged, and the refrigerant flowing back to the compressor structure can be compressed by the first compression cylinder and the second compression cylinder in turn and then participate in the refrigerant circulation again. The refrigerant flow path between the first compression cylinder and the second compression cylinder is generally communicated with a gas supplement branch in the system, and the refrigerant flowing out of the condensation is used to supplement the refrigerant of the dual-stage compression structure. However, the state of the refrigerant supplemented by the gas supplement branch is generally not controlled, and the inaccuracy of the refrigerant supplement state can easily lead to a decrease in the energy efficiency of the system. SUMMARY

[0003] The main purpose of the present application is to provide a control method of a heat pump system, the heat pump system and a storage medium, aiming to improve the energy efficiency of the heat pump system using dual-stage compression.

[0004] To achieve the above-mentioned purpose, the present application provides a control method of a heat pump system, the heat pump system comprising a compression mechanism, a first heat exchanger, a gas supplement branch and a second heat exchanger, the compression mechanism comprising a first compression cylinder and a second compression cylinder, an exhaust port of the first compression cylinder being communicated with a suction port of the second compression cylinder, a first flow path between the first heat exchanger and the second heat exchanger being communicated with one end of the gas supplement branch, a second flow path between the first compression cylinder and the second compression cylinder being communicated with the other end of the gas supplement branch, the gas supplement branch being provided with an adjusting valve, the control method of the heat pump system comprising the following steps:

[0005] obtaining an intermediate pressure between the first compression cylinder and the second compression cylinder;

[0006] determining a target suction temperature of the second compression cylinder according to the intermediate pressure;

[0007] controlling the adjusting valve to adjust the opening degree according to the current suction temperature of the second compression cylinder and the target suction temperature.

[0008] Optionally, part of the refrigerant between the first heat exchanger and the second heat exchanger is throttled by a throttling device and flows into the gas supplement branch, and the step of controlling the adjusting valve to adjust the opening degree according to the current suction temperature of the second compression cylinder and the target suction temperature comprises:

[0009] when the current suction temperature is greater than the target suction temperature, controlling the adjusting valve to increase the opening degree;

[0010] controlling the adjusting valve to decrease the opening degree when the current suction temperature is less than the target suction temperature.

[0011] Optionally, the step of determining the target suction temperature of the second compression cylinder according to the intermediate pressure comprises:

[0012] determining a saturation temperature value corresponding to the intermediate pressure;

[0013] determining the target suction temperature according to the saturation temperature value.

[0014] Optionally, the step of determining the target suction temperature according to the saturation temperature value comprises:

[0015] when the heat pump system is an intermediate complete cooling system, determining the saturation temperature value as the target suction temperature;

[0016] when the heat pump system is an intermediate incomplete cooling system, increasing the saturation temperature value according to a correction value to obtain the target suction temperature.

[0017] Optionally, the step of determining the saturation temperature value corresponding to the intermediate pressure comprises:

[0018] determining a first corresponding relationship between the intermediate pressure and the saturation temperature value according to a type of refrigerant in the heat pump system;

[0019] determining the saturation temperature value corresponding to the intermediate pressure according to the first corresponding relationship.

[0020] Optionally, the step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder comprises:

[0021] obtaining a suction pressure of the first compression cylinder and a discharge pressure of the second compression cylinder;

[0022] determining the intermediate pressure according to the suction pressure and the discharge pressure.

[0023] Optionally, the step of determining the intermediate pressure according to the suction pressure and the discharge pressure comprises:

[0024] determining a reference pressure value according to the suction pressure and the discharge pressure;

[0025] determining a pressure correction value according to a type of refrigerant in the heat pump system;

[0026] correcting the reference pressure value according to the pressure correction value to obtain the intermediate pressure value.

[0027] Optionally, after the step of controlling the adjusting opening of the adjusting valve according to the current suction temperature of the second compression cylinder and the target suction temperature, the method further comprises:

[0028] When the running time of the adjusting valve at the adjusted opening reaches a first preset time, returning to the step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder until the temperature difference between the current suction temperature of the second compression cylinder and the target suction temperature is less than or equal to a preset threshold.

[0029] Optionally, the control method of the heat pump system further comprises:

[0030] When the compression mechanism is started, obtaining a first state parameter, the first state parameter representing the energy demand state of the heat pump system;

[0031] Determining an initial frequency of the compression mechanism according to the first state parameter;

[0032] Controlling the compression mechanism to run according to the initial frequency;

[0033] When the compression mechanism runs at the initial frequency for greater than or equal to a second preset time, performing the step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder.

[0034] Optionally, after the step of controlling the compression mechanism to run according to the initial frequency, the method further comprises:

[0035] When the compression mechanism runs at the initial frequency for greater than or equal to a second preset time, obtaining at least two second state parameters detected at different times before the current time, the second state parameter representing the energy demand state of the heat pump system;

[0036] Determining a corresponding reference frequency according to each of the second state parameters;

[0037] Determining a target frequency according to at least two of the reference frequencies;

[0038] Controlling the compression mechanism to run according to the target frequency.

[0039] Optionally, the first state parameter and / or the second state parameter comprises the indoor temperature of the indoor space adjusted by the heat pump system, the set temperature of the heat pump system, and the air volume of the heat pump system.

[0040] Further, in order to achieve the above object, the application further provides a heat pump system, which comprises a compression mechanism, a first heat exchanger, a gas supplement branch, a second heat exchanger and a control device, the compression mechanism comprises a first compression cylinder and a second compression cylinder, an exhaust port of the first compression cylinder is communicated with a suction port of the second compression cylinder, a first flow path between the first heat exchanger and the second heat exchanger is communicated with one end of the gas supplement branch, a second flow path between the first compression cylinder and the second compression cylinder is communicated with the other end of the gas supplement branch, and the gas supplement branch is provided with an adjusting valve.

[0041] The adjusting valve is connected with the control device, the control device comprises a memory, a processor and a control program of the heat pump system stored in the memory and executable on the processor, and the control program of the heat pump system is executed by the processor to realize the steps of the control method of the heat pump system according to any one of the above.

[0042] Optionally, the heat pump system further comprises an economizer and a first electronic expansion valve, the first heat exchanger, the first electronic expansion valve and the second heat exchanger are sequentially connected, the first flow path is defined as a pipeline between the first electronic expansion valve and the second heat exchanger, the first flow path and the gas supplement branch are connected through the economizer heat exchange, and the adjusting valve is arranged on an inlet side of the economizer.

[0043] When the first heat exchanger is in a condensing state, the refrigerant flowing out of the first heat exchanger flows into the refrigerant branch through throttling of the first electronic expansion valve and flows into the first flow path.

[0044] Further, in order to achieve the above object, the application further provides a storage medium, which stores a control program of a heat pump system, and the control program of the heat pump system is executed by a processor to realize the steps of the control method of the heat pump system according to any one of the above.

[0045] The application provides a control method of a heat pump system, the compression mechanism of the heat pump system comprises a first compression cylinder and a second compression cylinder, a gas supplement branch uses refrigerant between a first heat exchanger and a second heat exchanger to supplement the state of refrigerant flowing into the second compression cylinder from the first compression cylinder, based on this, the target suction temperature of the second compression cylinder is determined according to the intermediate pressure between the first compression cylinder and the second compression cylinder, the suction temperature of the second compression cylinder is too high or too low, which will increase the work of the system and result in low energy efficiency, therefore, the adjusting valve on the refrigerant branch is controlled to adjust the opening degree according to the current suction temperature and the target suction temperature of the second compression cylinder, and the opening degree adjustment of the adjusting valve can adjust the state of refrigerant flowing into the second compression cylinder, so as to avoid that the suction temperature of the second compression cylinder is too high or too low, thereby effectively improving the energy efficiency of the heat pump system adopting double-stage compression. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 A refrigerant system structure schematic diagram of an embodiment of the heat pump system of the present application;

[0047] Figure 2 A hardware structure schematic diagram related to operation of an embodiment of the heat pump system of the present application;

[0048] Figure 3 A flow schematic diagram of an embodiment of the control method of the heat pump system of the present application;

[0049] Figure 4 A flow schematic diagram of another embodiment of the control method of the heat pump system of the present application;

[0050] Figure 5 A flow schematic diagram of still another embodiment of the control method of the heat pump system of the present application;

[0051] Figure 6 A flow schematic diagram of still another embodiment of the control method of the heat pump system of the present application;

[0052] Figure 7 A flow schematic diagram of still another optional embodiment of the control method of the heat pump system of the present application.

[0053] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application.

[0055] An embodiment of the present application proposes a heat pump system. The heat pump system can be a multi-connected air conditioner, a two-stage compression water heater, a three-stage compression system, etc.

[0056] In an embodiment of the present application, referring to Figure 1 , the heat pump system comprises a compression mechanism 200, a first heat exchanger 4, a gas supplement branch 03 and a second heat exchanger 12, the compression mechanism 200 comprises a first compression cylinder 1 and a second compression cylinder 2, an exhaust port of the first compression cylinder 1 is in communication with a suction port of the second compression cylinder 2, a first flow path 01 between the first heat exchanger 4 and the second heat exchanger 12 is in communication with one end of the gas supplement branch 03, a second flow path between the first compression cylinder 1 and the second compression cylinder 2 is in communication with the other end of the gas supplement branch 03, and the gas supplement branch 03 is provided with an adjusting valve 8. The adjusting valve 8 is connected with the control device 100.

[0057] In the present embodiment, the first heat exchanger 4 is arranged outdoors, and the second heat exchanger 12 is arranged indoors. In other embodiments, the first heat exchanger 4 can be arranged indoors, and the second heat exchanger 12 can be arranged outdoors.

[0058] In the present embodiment, the regulating valve 8 is an electronic expansion valve.

[0059] The first compression cylinder 1 and the second compression cylinder 2 can be arranged in the same compressor, the first compression cylinder 1 being a low-pressure chamber, and the second compression cylinder 2 being a high-pressure chamber. The first compression cylinder 1 and the second compression cylinder 2 can also be arranged in different compressors independent of each other. The compressor herein can include but is not limited to a scroll compressor and / or a screw compressor and / or a variable frequency compressor, etc.

[0060] The compression mechanism 200 can include at least two compression cylinders connected, for example, three compression cylinders, four compression cylinders, etc. Any two compression cylinders connected in sequence in the compression mechanism 200 can be the first compression cylinder 1 and the second compression cylinder 2 herein.

[0061] The refrigerant flowing back to the compression mechanism 200 in the first heat exchanger 4 or the second heat exchanger 12 first enters the first compression cylinder 1 for compression and then enters the second compression cylinder 2 for compression and is discharged to the compression mechanism 200.

[0062] The refrigerant flowing between the first heat exchanger 4 and the second heat exchanger 12 can flow into the second flow path under the regulating action of the regulating valve 8, the refrigerant flowing into the second flow path in the charge air branch 03 is merged with the refrigerant discharged from the first compression cylinder 1 and flows into the second compression cylinder 2. The regulating valve 8 can regulate the state (such as temperature, pressure and / or flow, etc.) of the refrigerant flowing into the second compression cylinder 2.

[0063] Further, the heat pump system further includes a throttling device, which can throttle the refrigerant flowing out after being condensed in the first heat exchanger 4 or the second heat exchanger 12. The first flow path 01 can be a pipeline between the throttling device and the first heat exchanger 4 or a pipeline between the throttling device and the second heat exchanger 12.

[0064] The type of the throttling device can include but is not limited to a thermal expansion valve, a throttling capillary, an electronic expansion valve, etc.

[0065] Further, the heat pump system further includes an economizer 9, the throttling device includes a first electronic expansion valve 7, the first heat exchanger 4, the first electronic expansion valve 7 and the second heat exchanger 12 are connected in sequence, the first flow path 01 is defined as a pipeline between the first electronic expansion valve 7 and the second heat exchanger 12, the first flow path 01 and the charge air branch 03 are heat exchange connected through the economizer 9, and the regulating valve 8 is arranged at the inlet side of the economizer 9.

[0066] When the first heat exchanger 4 is in condensing state, the refrigerant flowing out of the first heat exchanger 4 flows into the refrigerant branch through the first electronic expansion valve 7 and into the first flow path 01.

[0067] When the heat pump system is running, the first heat exchanger 4 can be fixed in condensing state and the second heat exchanger 12 can be fixed in evaporating state. Alternatively, the heat exchange states of the first heat exchanger 4 and the second heat exchanger 12 can be switched when the first heat exchanger 4 is switched to condensing state and the second heat exchanger 12 is switched to evaporating state,

[0068] The refrigerant flowing into the refrigerant branch through the first electronic expansion valve 7 is cooled by the economizer 9 and the first flow path 01 under the adjustment of the regulating valve 8. The refrigerant flowing into the first flow path 01 through the first electronic expansion valve 7 is cooled by the refrigerant in the refrigerant branch in the economizer 9. The cooled refrigerant is mixed with the refrigerant discharged from the first compression cylinder 1 and then flows into the second compression cylinder 2.

[0069] Further, in an embodiment, the heat pump system further comprises a switching assembly 3 and a throttling device. The exhaust port of the second compression cylinder 2, the return port of the first compression cylinder 1, the first heat exchanger 4 and the second heat exchanger 12 are connected to the switching assembly 3. The throttling device further comprises a second electronic expansion valve 11, which is arranged between the economizer 9 and the second heat exchanger 12.

[0070] The switching assembly 3 can be used to switch the heat exchange states of the first heat exchanger 4 and the second heat exchanger 12.

[0071] The switching assembly 3 has a first operating state and a second operating state. When the switching assembly 3 is in the first operating state, the exhaust port of the second compression cylinder 2 is communicated with the first heat exchanger 4 and the return port of the first compression cylinder 1 is communicated with the second heat exchanger 12. When the switching assembly 3 is in the second operating state, the exhaust port of the second compression cylinder 2 is communicated with the second heat exchanger 12 and the return port of the first compression cylinder 1 is communicated with the second heat exchanger 12.

[0072] In the embodiment, the switching assembly 3 comprises a four-way valve. In other embodiments, the switching assembly 3 can comprise a plurality of electromagnetic valves, at least two multi-way valves or a combination of electromagnetic valves and multi-way valves, etc.

[0073] The operation of the heat pump system in the refrigeration mode and the heating mode is described as follows:

[0074] In the heating mode, the reversing assembly 3 operates in the first operating state, and the adjusting valve 8 is opened. The refrigerant discharged from the second compression cylinder 2 flows through the first heat exchanger 4 and the first electronic expansion valve 7 in sequence. The first heat exchanger 4 is in the condensing state, and the first electronic expansion valve 7 can throttle and depressurize the refrigerant flowing out of the first heat exchanger 4. Part of the refrigerant flowing out of the first electronic expansion valve 7 flows through the economizer 9, the second electronic expansion valve 12, and the second heat exchanger 12 in sequence, and then returns to the first compression cylinder 1. The first compression cylinder 1 compresses the returned refrigerant and then enters the second flow path. Another part of the refrigerant flowing out of the first electronic expansion valve 7 flows through the adjusting valve 8 and the economizer 9, and then enters the second flow path. The refrigerant in the second flow path mixes with the refrigerant discharged from the first compression cylinder 1, and then enters the second compression cylinder 2. The second compression cylinder 2 further compresses the refrigerant flowing in, and the refrigerant circulation process is repeated.

[0075] In the cooling mode, the reversing assembly 3 operates in the second operating state, and the adjusting valve 8 is closed. The refrigerant branch prohibits supplement of the refrigerant flowing into the second compression cylinder 2. The refrigerant discharged from the second compression cylinder 2 flows through the second heat exchanger 12, the second electronic expansion valve 12, and the first heat exchanger 4 in sequence, and then returns to the first compression cylinder 1. The first compression cylinder 1 compresses the returned refrigerant. The refrigerant compressed by the first compression cylinder 1 flows through the second flow path and enters the second compression cylinder 2 for further compression. The refrigerant discharged from the second compression cylinder 2 is circulated according to the above process.

[0076] Further, in an embodiment, a gas-liquid separator 6 is arranged between the reversing assembly 3 and the gas return port of the first compression cylinder 1. The gas phase outlet of the gas-liquid separator 6 is communicated with the gas return port of the first compression cylinder 1, so as to avoid liquid hammer of the compression mechanism 200.

[0077] Further, in an embodiment, the heat pump system further comprises a pressure detection module 15. The pressure detection module 15 comprises a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged at the suction port of the first compression cylinder 1 to detect the suction pressure of the first compression cylinder 1. The second pressure sensor is arranged at the discharge port of the second compression cylinder 2 to detect the discharge pressure of the second compression cylinder 2.

[0078] Further, in an embodiment, the heat pump system further comprises a temperature detection module 14. The temperature detection module 14 comprises a first temperature sensor arranged at the suction port of the second compression cylinder 2 to detect the suction temperature of the second compression cylinder 2. Further, the temperature detection module 14 further comprises a second temperature sensor and / or a third temperature sensor. The second temperature sensor is arranged at the gas return port of the first compression cylinder 1 to detect the gas return temperature of the first compression cylinder 1. The third temperature sensor is arranged at the discharge port of the second compression cylinder 2 to detect the discharge temperature of the second compression cylinder 2.

[0079] In the embodiment of the present application, the heat pump system further comprises a control device 100, and the compression mechanism 200, the regulating valve 8, the throttling device, the reversing assembly 3, the pressure detection module 15 and the temperature detection module 14 are connected with the control device 100. Referring to Figure 2 The control device 100 of the heat pump system comprises a processor 1001, such as a CPU, and a memory 1002. The components are connected with each other through a communication bus for communication. 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.

[0080] Those skilled in the art can understand that Figure 2 The device structure shown in the above embodiment does not constitute a limitation on the device, and can include more or fewer components than those shown in the figure, or combine certain components, or different component arrangements.

[0081] As shown in Figure 2 The memory 1002, as a computer storage medium, can include a control program of the heat pump system. The processor 1001 can be used to call the control program of the heat pump system stored in the memory 1002 and perform the related step operations of the control method of the heat pump system in the following embodiments.

[0082] The embodiment of the present application also provides a control method of a heat pump system, which is applied to the heat pump system.

[0083] Referring to Figure 3 An embodiment of the control method of the heat pump system is provided in the present application. In the embodiment, the control method of the heat pump system comprises the following steps.

[0084] Step S10: obtaining an intermediate pressure between the first compression cylinder and the second compression cylinder;

[0085] The intermediate pressure is specifically a pressure when the refrigerant in the second flow path is cooled to dry saturated gas.

[0086] The intermediate pressure can be determined according to the data detected by the pressure detection module or according to the data detected by the pressure sensor in the second flow path.

[0087] In the embodiment, when the first heat exchanger is in a condensing state, for example, when the reversing assembly operates in the first operating state, the step S10 can be performed.

[0088] Step S20: determining a target suction temperature of the second compression cylinder according to the intermediate pressure;

[0089] The target suction temperature here is a target value of the suction temperature of the second compression cylinder when the compression mechanism reaches the optimal energy efficiency.

[0090] Different intermediate pressures correspond to different target intake temperatures. Specifically, a corresponding relationship between the intermediate pressure and the target intake temperature can be established, which can include a calculation formula, a mapping table, or an algorithm rule, etc. Based on the corresponding relationship, the target intake temperature corresponding to the current intermediate pressure can be determined.

[0091] In an embodiment, the target intake temperature can be calculated by substituting the intermediate pressure into a preset formula. In another embodiment, the target intake temperature can be obtained by querying a preset mapping table, etc.

[0092] Step S30, controlling the adjustment opening of the adjusting valve according to the current intake temperature of the second compression cylinder and the target intake temperature.

[0093] The current intake temperature here can be obtained by acquiring the data detected by the first temperature sensor in real time.

[0094] The opening adjustment parameter is determined between the current intake temperature and the target intake temperature, and the opening adjustment parameter is used to control the adjustment opening of the adjusting valve. The opening adjustment parameter here includes the opening adjustment direction (reducing the opening or increasing the opening), and / or the opening adjustment amplitude, and / or the opening adjustment rate, etc.

[0095] Alternatively, the relationship value (such as the difference value or the ratio value, etc.) between the current intake temperature and the target intake temperature can be determined, and the opening adjustment parameter is determined based on the relationship value to control the adjustment opening of the adjusting valve. Or, the size relationship between the current intake temperature and the target intake temperature can be determined, and the opening adjustment parameter is determined based on the size relationship to control the adjustment opening of the adjusting valve. The intake temperature of the second compression cylinder after the adjustment opening of the adjusting valve can change towards the target intake temperature.

[0096] When the current intake temperature is less than the target intake temperature, the opening of the adjusting valve is controlled to be reduced; when the current intake temperature is greater than the target intake temperature, the opening of the adjusting valve is controlled to be increased; when the difference between the current intake temperature and the target intake temperature is less than a preset value, the opening of the adjusting valve is controlled to be reduced; when the difference between the current intake temperature and the target intake temperature is greater than a preset value, the opening of the adjusting valve is controlled to be increased;

[0097] In this embodiment, when the adjusting valve increases or reduces the opening, the opening adjustment amplitude can be adjusted according to the pre-set fixed opening adjustment amplitude. In other embodiments, the opening adjustment amplitude when the adjusting valve increases or reduces the opening can also be determined according to the current intake temperature and the target intake temperature, etc.

[0098] The control method of the heat pump system provided in the embodiment of the present application, the compression mechanism of the heat pump system includes a first compression cylinder and a second compression cylinder, the air supplement branch uses the refrigerant between the first heat exchanger and the second heat exchanger to supplement the state of the refrigerant flowing into the second compression cylinder from the first compression cylinder, based on this, the target suction temperature of the second compression cylinder is determined according to the intermediate pressure between the first compression cylinder and the second compression cylinder, because the suction temperature of the second compression cylinder is too high or too low, the system work increases, and the energy efficiency is low, therefore, the opening adjustment of the adjusting valve on the refrigerant branch is controlled according to the current suction temperature and the target suction temperature of the second compression cylinder, the opening adjustment of the adjusting valve can realize the state adjustment of the refrigerant flowing into the second compression cylinder, so as to avoid that the suction temperature of the second compression cylinder is too high or too low, and the energy efficiency of the heat pump system using double-stage compression is effectively improved.

[0099] Further, based on the above-mentioned embodiment, another embodiment of the control method of the heat pump system of the present application is provided. In the present embodiment, part of the refrigerant throttled by the throttling device between the first heat exchanger and the second heat exchanger flows into the air supplement branch. In the present embodiment, the first heat exchanger is in a condensing state, the second heat exchanger is in an evaporating state, and part of the low-temperature refrigerant throttled by the first electronic expansion valve flows into the air supplement branch. The adjusting valve is used to adjust the flow of the low-temperature refrigerant flowing into the air supplement branch. Referring to Figure 4 , step S30 includes:

[0100] Step S31, when the current suction temperature is greater than the target suction temperature, the opening of the adjusting valve is increased;

[0101] Step S32, when the current suction temperature is less than the target suction temperature, the opening of the adjusting valve is decreased.

[0102] The current suction temperature is greater than the target suction temperature, which indicates that the suction temperature of the second compression cylinder is too high, the work of the second compression cylinder is large, and the system energy efficiency is poor. The current suction temperature is less than the target suction temperature, which indicates that the suction temperature of the second compression cylinder is too low, the work of the second compression cylinder is large, and the system energy efficiency is poor.

[0103] In the present embodiment, the opening of the adjusting valve can be increased or decreased according to the preset opening adjustment amplitude. In other embodiments, the opening of the adjusting valve can also be increased or decreased according to the preset opening adjustment rate; or, the actual running state parameters (such as the intermediate pressure and / or the exhaust temperature of the first compression cylinder and / or the exhaust temperature of the second compression cylinder and / or the suction temperature of the first compression cylinder and / or the suction temperature of the second compression cylinder, etc.) of the heat pump system can be used to determine the opening adjustment value of the adjusting valve to control the opening of the adjusting valve to be increased or decreased.

[0104] In the embodiment, when the current suction temperature is greater than the target suction temperature, the opening of the adjusting valve is increased, and the amount of low-temperature refrigerant mixed by the refrigerant flowing out of the first compression cylinder is increased, so as to effectively reduce the temperature of the refrigerant sucked by the second compression cylinder; when the current suction temperature is less than the target suction temperature, the opening of the adjusting valve is reduced, and the amount of low-temperature refrigerant mixed by the refrigerant flowing out of the first compression cylinder is reduced, so as to effectively increase the temperature of the refrigerant sucked by the second compression cylinder. Based on this, the suction temperature of the second compression cylinder can be maintained at the target suction temperature, the work of the second compression cylinder can be reduced, and the energy efficiency of the heat pump system using two-stage compression can be further improved.

[0105] Further, before the step S10, the embodiment further includes: controlling the adjusting valve to operate at an initial opening greater than a preset opening.

[0106] The preset opening is less than the maximum opening of the adjusting valve, and specifically, can be 70% of the maximum opening.

[0107] In the embodiment, the adjusting valve is controlled to operate at the maximum opening, and the step S10 is performed during the operation of the adjusting valve at the maximum opening.

[0108] In the embodiment, the adjusting valve is first controlled to operate at a relatively large opening, so that the initial temperature of the refrigerant sucked by the second compression cylinder is not excessively low due to the small refrigerant supply temperature of the charge branch structure (for example, the economizer) designed.

[0109] Further, based on any of the above embodiments, another embodiment of the control method of the heat pump system is provided. In the embodiment, referring to Figure 5 , the step of determining the target suction temperature of the second compression cylinder according to the intermediate pressure includes:

[0110] Step S21, determining a saturation temperature value corresponding to the intermediate pressure;

[0111] Different intermediate pressures correspond to different saturation temperature values. Specifically, a corresponding relationship between the intermediate pressure and the saturation temperature value can be established in advance, and the corresponding relationship can include a calculation formula or a mapping relationship. Based on the corresponding relationship, the saturation temperature value corresponding to the current intermediate pressure can be determined.

[0112] Further, the corresponding relationship between the intermediate pressure and the saturation temperature value can have more than one, and one of the more than one corresponding relationships is determined as a target corresponding relationship according to the actual operating state of the heat pump system, and the saturation temperature value corresponding to the intermediate pressure is determined according to the target corresponding relationship.

[0113] Step S22, determining the target suction temperature according to the saturation temperature value.

[0114] Different saturation temperature values correspond to different target suction temperatures. Specifically, the saturation temperature value can be determined as the target suction temperature. Alternatively, the result obtained by correcting the saturation temperature value by a correction value can be used as the target suction temperature, where the correction value can be a fixed value set in advance or a value determined according to the actual operating state of the heat pump system.

[0115] In this embodiment, by determining the saturation temperature value corresponding to the intermediate pressure and determining the target suction temperature according to the saturation temperature value, the refrigerant sucked into the second compression cylinder can be accurately brought to the required state (saturated state or superheated state, etc.), thereby further improving the energy efficiency of the heat pump system.

[0116] Further, in this embodiment, step S21 includes: determining a first correspondence relationship between the intermediate pressure and the saturation temperature value according to the type of refrigerant in the heat pump system; and determining the saturation temperature value corresponding to the intermediate pressure according to the first correspondence relationship.

[0117] The first correspondence relationship can be in the form of a calculation relationship or a mapping relationship. If the first correspondence relationship corresponding to different types of refrigerant is different, the saturation temperature value corresponding to the intermediate pressure is different.

[0118] In this embodiment, the first correspondence relationship includes a mapping table, and the mapping table between the intermediate pressure and the saturation temperature value is different for different types of refrigerant. The corresponding mapping table can be selected as the target mapping table according to the type of refrigerant filled in the heat pump system, and the result matched by querying the target mapping table according to the intermediate pressure can be used as the saturation temperature value.

[0119] In this embodiment, the first correspondence relationship is selected according to the type of refrigerant in the heat pump system to determine the saturation temperature value corresponding to the intermediate pressure, which is beneficial to further improve the accuracy of the target suction temperature and further improve the energy efficiency of the heat pump system.

[0120] Further, in this embodiment, step S22 includes: when the heat pump system is an intermediate complete cooling system, determining the saturation temperature value as the target suction temperature; and when the heat pump system is an intermediate incomplete cooling system, increasing the saturation temperature value by a correction value to obtain the target suction temperature.

[0121] The intermediate cooling system refers to a cooling process in which the superheated vapor discharged from the first compression cylinder is isobarically cooled to dry saturated vapor at the intermediate pressure.

[0122] The intermediate incomplete cooling system refers to a vapor obtained by mixing the exhaust gas of the first compression cylinder, which has a certain degree of superheat, and the refrigerant entering the second compression cylinder is superheated vapor at the intermediate pressure.

[0123] Here, whether the heat pump system is an intermediate complete refrigerant system or an intermediate incomplete refrigerant system is specifically configured according to the type of the refrigerant filled in the heat pump system.

[0124] Specifically, the type of the refrigerant filled in the heat pump system is acquired, and it is determined according to the type of the refrigerant whether the heat pump system is an intermediate complete refrigerant system or an intermediate incomplete refrigerant system. In addition, the system type of the heat pump system can also be pre-stored in the memory as identification information. Based on this, the pre-stored identification information corresponding to the system type is acquired, and it can be determined according to the pre-stored identification information whether the heat pump system is an intermediate complete refrigerant system or an intermediate incomplete refrigerant system.

[0125] In the embodiment, the system is filled with different refrigerants, and the target state required by the second compression cylinder to suck in the refrigerant when reaching a state with better energy efficiency is different. In the intermediate complete refrigerant system, the energy efficiency is reduced when the second compression cylinder sucks in the refrigerant in an unsaturated state. Therefore, the saturated temperature value is taken as the target suction temperature, which is beneficial to ensure that the second compression cylinder sucks in the refrigerant in a saturated state, so as to effectively improve the energy efficiency of the heat pump system. In the intermediate incomplete refrigerant system, the energy efficiency is reduced when the second compression cylinder sucks in the refrigerant in a saturated state or a supercooled state. Therefore, the temperature obtained by increasing the saturated temperature value by a correction value is taken as the target suction temperature, which is beneficial to ensure that the second compression cylinder sucks in the refrigerant in a superheated state, so as to effectively improve the energy efficiency of the heat pump system.

[0126] Further, based on any of the above embodiments, another embodiment of the control method of the heat pump system of the present application is proposed. In the embodiment, referring to Figure 6 , step S10 comprises:

[0127] Step S11, acquiring the suction pressure of the first compression cylinder and the discharge pressure of the second compression cylinder;

[0128] The suction pressure is specifically detected by the first pressure sensor. The discharge pressure is specifically detected by the second pressure sensor.

[0129] Step S12, determining the intermediate pressure according to the suction pressure and the discharge pressure.

[0130] Different suction pressures and different discharge pressures correspond to different intermediate pressures. Specifically, the intermediate pressure can be calculated by substituting the suction pressure and the discharge pressure into a preset formula; or the intermediate pressure can be obtained by looking up a table according to the suction pressure and the discharge pressure.

[0131] In the embodiment, the intermediate pressure of the two-stage compression mechanism is determined in combination with the suction pressure and the intermediate pressure, which is beneficial to improve the accuracy of the determined intermediate pressure, thereby improving the accuracy of the subsequent adjustment of the valve opening degree based on the intermediate pressure, so as to further improve the energy efficiency of the system.

[0132] Further, in the embodiment, a reference pressure value is determined according to the suction pressure and the discharge pressure; a pressure correction value is determined according to a refrigerant type in the heat pump system; and the reference pressure value is corrected according to the pressure correction value to obtain the intermediate pressure value.

[0133] In the embodiment, PD is the discharge pressure, PS is the suction pressure, the reference pressure value is In other embodiments, the reference pressure value can also be determined according to the average or other relationship value of the discharge pressure and the suction pressure.

[0134] The pressure correction value can include a pressure correction amplitude or a pressure correction ratio, etc. The intermediate pressure value obtained by correction through the pressure correction value is less than or equal to the reference pressure value.

[0135] Different refrigerant types correspond to different pressure correction values. In the embodiment, the pressure correction value is a pressure correction ratio, the pressure correction value corresponding to R32 / R410A refrigerant is less than the pressure correction value corresponding to R22 refrigerant, and the pressure correction value corresponding to R22 refrigerant is less than the pressure correction value corresponding to R717 refrigerant. For example, the pressure correction value of R32 / R410A refrigerant is in the range of 0.85-0.92; the pressure correction value of R22 refrigerant is in the range of 0.9-0.95; and the pressure correction value of R717 refrigerant is in the range of C1=0.95-1.

[0136] In the embodiment, the pressure correction value is a pressure correction ratio, and the product between the pressure correction value and the reference pressure value is taken as the intermediate pressure value; in other embodiments, the pressure correction value is a pressure correction amplitude, and the difference between the reference pressure value and the pressure correction amplitude can be taken as the intermediate pressure value.

[0137] In the embodiment, the reference pressure value is corrected by the pressure correction value determined according to the refrigerant type to obtain the intermediate pressure, which is beneficial to improve the accuracy of the intermediate pressure, so as to improve the accuracy of the target suction temperature based on the intermediate pressure to adjust the opening degree of the regulating valve, and further improve the energy efficiency of the heat pump system.

[0138] Further, based on any of the above embodiments, after the step of controlling the opening degree of the regulating valve according to the current suction temperature of the second compression cylinder and the target suction temperature, the method further comprises:

[0139] When the regulating valve runs at the adjusted opening degree for a first preset time length, returning to execute the step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder until the temperature difference between the current suction temperature of the second compression cylinder and the target suction temperature is less than or equal to a preset threshold value.

[0140] Specifically, in the control method of the heat pump system, when the step S31 and the step S32 are performed, the opening degree of the adjusting valve can be increased or decreased according to the preset amplitude. When the length of time that the adjusting valve operates at the increased or decreased opening degree reaches the first preset length of time, and the temperature difference between the current suction temperature of the second compression cylinder and the target suction temperature is greater than the preset threshold, the step S10 can be performed again to adjust the opening degree of the adjusting valve based on the target suction temperature and the current suction temperature.

[0141] In the embodiment, by the above-mentioned manner, the suction temperature of the second compression cylinder can be accurately ensured to reach the target suction temperature, thereby further ensuring that the energy efficiency of the heat pump system is effectively improved.

[0142] Further, based on any one of the above-mentioned embodiments, another optional embodiment of the control method of the heat pump system is provided. In the embodiment, referring to Figure 7 , the control method of the heat pump system further comprises:

[0143] Step S01, when the compression mechanism is started, a first state parameter is obtained, the first state parameter indicating the energy demand state of the heat pump system;

[0144] In the embodiment, the first state parameter includes the indoor temperature of the indoor space adjusted by the heat pump system, the set temperature of the heat pump system, and the air volume of the heat pump system. In other embodiments, the first state parameter can also be the indoor temperature or the indoor temperature and the set temperature.

[0145] The device in which the heat pump system is arranged can be provided with an air outlet communicating with the indoor space. Here, the air volume is the air volume discharged from the air outlet. The heat pump system can be provided with a corresponding indoor fan corresponding to the second heat exchanger arranged in the indoor space. The indoor fan is arranged corresponding to the air outlet. Based on this, the air volume can be determined according to the target rotating speed of the indoor fan. The indoor temperature can be detected by a sensor arranged on a return air outlet of the device in which the heat pump system is arranged and communicating with the indoor space, or can be determined according to the data detected by a temperature detection module in the indoor space. The set temperature is a target temperature that the indoor space adjusted by the heat pump system needs to reach.

[0146] Step S02, determining an initial frequency of the compression mechanism according to the first state parameter;

[0147] Specifically, the temperature difference between the indoor temperature and the set temperature can be determined, and the initial frequency can be determined according to the temperature difference. Alternatively, the initial frequency can be determined according to the temperature difference and the air volume.

[0148] Step S03, controlling the compression mechanism to operate according to the initial frequency;

[0149] According to the initial frequency, the corresponding current is output to the motor in the compression mechanism, so that the compression mechanism operates at the initial frequency under the driving of the motor.

[0150] In step S04, when the duration of the operation of the compression mechanism at the initial frequency is greater than or equal to a second preset duration, the step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder is performed.

[0151] The second preset duration is the shortest duration required for the compression mechanism to reach a stable state after starting. When the compression mechanism operates at the initial frequency for greater than or equal to the second preset duration, it indicates that the compression mechanism has reached a stable operating state after starting.

[0152] When the control method of the heat pump system further includes step S101, when the duration of the operation of the compression mechanism at the initial frequency is greater than or equal to a second preset duration, step S101 is performed first and then step S10 is performed.

[0153] In this embodiment, after the compression mechanism starts, the initial frequency determined according to the first state parameter representing the energy demand is used to control the stable operation of the compression mechanism for at least a second preset duration, and then the opening of the adjustment valve is adjusted based on the target suction temperature determined according to the intermediate pressure, so as to avoid the inaccuracy of the intermediate pressure obtained due to the unstable operation of the compression mechanism, thereby improving the accuracy of the adjustment valve adjustment, and further improving the energy efficiency of the heat pump system. In this embodiment, the initial frequency is determined in combination with the indoor temperature, the set temperature and the air volume, which is beneficial to improving the energy efficiency of the heat pump system.

[0154] Further, the step of controlling the operation of the compression mechanism according to the initial frequency further includes: when the duration of the operation of the compression mechanism at the initial frequency is greater than or equal to a second preset duration, obtaining at least two second state parameters detected at different times before the current time, the second state parameters representing the energy demand state of the heat pump system; determining a corresponding reference frequency according to each of the second state parameters; determining a target frequency according to at least two reference frequencies; and controlling the operation of the compression mechanism according to the target frequency.

[0155] The interval between the different times is set to a duration. In this embodiment, the number of second state parameters and corresponding reference frequencies is ten. In other embodiments, the number of second state parameters and corresponding reference frequencies can also be set to other values, such as 2 or 6 or 15, etc.

[0156] In the embodiment, the second state parameter includes an indoor temperature of the indoor space regulated by the heat pump system, a set temperature of the heat pump system, and an air volume of the heat pump system. In other embodiments, the second state parameter can be the indoor temperature or the indoor temperature and the set temperature.

[0157] The device in which the heat pump system is arranged can be provided with an air outlet in communication with the indoor space, and the air volume here is the air volume discharged from the air outlet. The heat pump system can be provided with a corresponding indoor fan corresponding to the second heat exchanger arranged in the indoor space, and the indoor fan is arranged corresponding to the air outlet. Therefore, the air volume here can be determined according to the target rotating speed of the indoor fan. The indoor temperature can be detected by a sensor arranged on a return air outlet in communication with the indoor space of the device in which the heat pump system is arranged, or can be determined according to the data detected by a temperature detection module in the indoor space. The set temperature is a target temperature that the indoor space regulated by the heat pump system needs to reach.

[0158] Specifically, a temperature difference value of the indoor temperature and the set temperature can be determined, and the reference frequency can be determined according to the temperature difference value. Alternatively, the reference frequency can be determined according to the temperature difference value and the air volume. In the embodiment, the frequency correction value corresponding to the initial frequency is determined according to the temperature difference value and the air volume, and the reference frequency is obtained by correcting the initial frequency according to the frequency correction value.

[0159] In the embodiment, the target frequency here is determined according to the mean value of the at least two reference frequencies. In other embodiments, the target frequency can also be determined according to the maximum value or the minimum value of the at least two reference frequencies. Alternatively, the target frequency is calculated by weighted average according to the at least two reference frequencies and the weight values of the respective reference frequencies, wherein the weight values can be determined according to the temperature data and / or pressure data of the compression mechanism detected at the detection time of the corresponding second state parameter.

[0160] It should be noted that the determination process of the target frequency and the process of controlling the operation of the compression mechanism according to the target frequency are not limited in the order of execution of the above-mentioned adjustment process of the valve. For example, steps S10 to S30 can be executed in the process of controlling the operation of the compression mechanism according to the target frequency.

[0161] In the embodiment, the target frequency of the normal operation process of the compression mechanism is determined in combination with the at least two reference frequencies determined according to the energy demand state parameters detected at the at least two time points before the current time, which is beneficial to ensure that the determined target frequency can accurately meet the capacity demand and ensure the comfort of the indoor space regulated by the heat pump system.

[0162] Further, in order to better illustrate the effect achieved by the scheme of the present application, the following takes the R410A or R32 secondary compression heat pump system as an example to provide the data of the system of the prior art when the intermediate refrigerant supplement state is not adjusted and the data of the system when the intermediate refrigerant supplement state is adjusted by using the adjusting valve of the present application:

[0163] Item Prior art Invention Name H42 H42 Press frequency 67 Hz 67 Hz Measured capacity 10979 10630 Energy efficiency ratio 2.408 2.639 Press power 3700 3387 Exhaust temperature 81.9 80 Condensing temperature 39.76 / 2464 35.7 / 2228 Evaporating temperature -21.38 / 385 -21.6 / 382.6 Injection temperature 7.37 / 1023 2.74 / 876 Supplemental gas superheat 0.13 Dryness 0.62

[0164] From the above table, it can be seen that the control mode of the adjusting valve adopted by the scheme of the present application effectively reduces the overheat degree of the air supplement of the heat pump system and effectively improves the energy efficiency ratio.

[0165] In addition, the present application also proposes a storage medium, and the storage medium stores a control program of a heat pump system, and the control program of the heat pump system is executed by a processor to realize the related steps of any one of the embodiments of the control method of the heat pump system.

[0166] It should be noted that in this paper, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or system. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or system including the element.

[0167] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0168] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and necessary general hardware platform, of course, they can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disc, optical disc) as described above, and includes a plurality of instructions for making a terminal device (which can be a mobile phone, computer, server, heat pump system or network device, etc.) execute the methods described in various embodiments of the present application.

[0169] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method of a heat pump system, characterized by, The heat pump system comprises a compression mechanism, a first heat exchanger, a gas supplement branch and a second heat exchanger, the compression mechanism comprises a first compression cylinder and a second compression cylinder, an exhaust port of the first compression cylinder is communicated with a suction port of the second compression cylinder, a first flow path between the first heat exchanger and the second heat exchanger is communicated with one end of the gas supplement branch, a second flow path between the first compression cylinder and the second compression cylinder is communicated with the other end of the gas supplement branch, the gas supplement branch is provided with an adjusting valve, and the control method of the heat pump system comprises the following steps: obtaining an intermediate pressure between the first compression cylinder and the second compression cylinder; determining a target suction temperature of the second compression cylinder according to the intermediate pressure; controlling the adjusting valve to adjust the opening degree according to the current suction temperature of the second compression cylinder and the target suction temperature; wherein the step of determining the target suction temperature of the second compression cylinder according to the intermediate pressure comprises: determining a saturation temperature value corresponding to the intermediate pressure; when the heat pump system is an intermediate complete cooling system, determining that the saturation temperature value is the target suction temperature; when the heat pump system is an intermediate incomplete cooling system, increasing the saturation temperature value according to a correction value to obtain the target suction temperature.

2. The control method of a heat pump system according to claim 1, characterized by, The part of the refrigerant flowing through the throttling device between the first heat exchanger and the second heat exchanger flows into the gas supplement branch, and the step of controlling the adjusting valve to adjust the opening degree according to the current suction temperature of the second compression cylinder and the target suction temperature comprises: when the current suction temperature is greater than the target suction temperature, controlling the adjusting valve to increase the opening degree; when the current suction temperature is less than the target suction temperature, controlling the adjusting valve to decrease the opening degree.

3. The control method of a heat pump system according to claim 1, characterized by, The step of determining the saturation temperature value corresponding to the intermediate pressure comprises: determining a first corresponding relationship between the intermediate pressure and the saturation temperature value according to the type of refrigerant in the heat pump system; determining the saturation temperature value corresponding to the intermediate pressure according to the first corresponding relationship.

4. The control method of a heat pump system according to claim 1, characterized by, The step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder comprises: obtaining a suction pressure of the first compression cylinder and an exhaust pressure of the second compression cylinder; determining the intermediate pressure according to the suction pressure and the exhaust pressure.

5. The control method of a heat pump system according to claim 4, characterized by, The step of determining the intermediate pressure according to the suction pressure and the exhaust pressure comprises: determining a reference pressure value according to the suction pressure and the exhaust pressure; determining a pressure correction value according to the type of refrigerant in the heat pump system; correcting the reference pressure value according to the pressure correction value to obtain the intermediate pressure value.

6. The control method of a heat pump system according to claim 1, characterized by, After the step of controlling the adjusting valve to adjust the opening degree according to the current suction temperature of the second compression cylinder and the target suction temperature, the method further comprises: when the running time of the adjusting valve at the adjusted opening degree reaches a first preset time, returning to execute the step of obtaining the intermediate pressure between the first compression cylinder and the second compression cylinder until the temperature difference between the current suction temperature of the second compression cylinder and the target suction temperature is less than or equal to a preset threshold value.

7. The control method of a heat pump system according to any one of claims 1 to 6, characterized by, The control method of the heat pump system further comprises: acquire a first state parameter representing an energy demand state of the heat pump system when the compression mechanism is started; determine an initial frequency of the compression mechanism according to the first state parameter; control the compression mechanism to operate according to the initial frequency; acquire the intermediate pressure between the first compression cylinder and the second compression cylinder when the compression mechanism operates at the initial frequency for more than or equal to a second preset time length.

8. The control method of a heat pump system according to claim 7, characterized by, The step of controlling the compression mechanism to operate according to the initial frequency further comprises: acquire at least two second state parameters representing an energy demand state of the heat pump system detected at different time points before the current time point when the compression mechanism operates at the initial frequency for more than or equal to a second preset time length; determine a corresponding reference frequency according to each second state parameter; determine a target frequency according to at least two reference frequencies; control the compression mechanism to operate according to the target frequency.

9. The control method of a heat pump system according to claim 8, characterized by, The first state parameter and / or the second state parameter comprises an indoor temperature of an indoor space adjusted by the heat pump system, a set temperature of the heat pump system, and an air volume of an air outlet of the heat pump system.

10. A heat pump system, characterized by, The heat pump system comprises a compression mechanism, a first heat exchanger, a gas supplement branch, a second heat exchanger, and a control device, the compression mechanism comprises a first compression cylinder and a second compression cylinder, an exhaust port of the first compression cylinder is in communication with an air inlet port of the second compression cylinder, a first flow path between the first heat exchanger and the second heat exchanger is in communication with one end of the gas supplement branch, a second flow path between the first compression cylinder and the second compression cylinder is in communication with the other end of the gas supplement branch, and the gas supplement branch is provided with an adjusting valve; The adjusting valve is connected to the control device, and the control device comprises a memory, a processor, and a heat pump system control program stored in the memory and executable on the processor, and the heat pump system control program implements the steps of the heat pump system control method according to any one of claims 1 to 9 when executed by the processor.

11. The heat pump system of claim 10, wherein, The heat pump system further comprises an economizer and a first electronic expansion valve, the first heat exchanger, the first electronic expansion valve, and the second heat exchanger are sequentially connected, the first flow path is defined as a pipeline between the first electronic expansion valve and the second heat exchanger, the first flow path and the gas supplement branch are connected through heat exchange of the economizer, and the adjusting valve is arranged on an inlet side of the economizer; When the first heat exchanger is in a condensing state, a part of the refrigerant flowing out of the first heat exchanger flows into the gas supplement branch after throttling of the first electronic expansion valve, and another part of the refrigerant flows into the first flow path.

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

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