Heat pump system, enthalpy-increasing air supplement control method and device, equipment and storage medium

Abstract

The application provides a heat pump system, an enthalpy-increasing air supplement control method and device, equipment and a storage medium, relates to the technical field of heat pumps, and solves the problem that the heat pump system cannot be compatible with the enthalpy-increasing air supplement demand of the refrigeration mode and the heating mode in the related art. The heat pump system can provide a corresponding loop to enable refrigerant to be supplemented into a compressor to play an enthalpy-increasing air supplement role. Then, through control of the first electromagnetic valve and the second electromagnetic valve, the main control equipment can form different enthalpy-increasing loops for the refrigerant in the heat pump system corresponding to the current operation mode, so that the refrigerant coming from the enthalpy-increasing loop does not need to pass through multiple throttles, and the pressure can meet the requirements to enable the refrigerant to be supplemented into the compressor, thereby being compatible with the enthalpy-increasing air supplement demand of different operation modes. Then, the heat pump system can realize the function of enthalpy-increasing air supplement in different operation modes, which helps to improve the energy efficiency of the unit.

Description

Technical Field

[0001] The present application relates to the field of heat pump technology, and in particular to a heat pump system, an enthalpy-increasing air supply control method, a device, an equipment, and a storage medium. Background Art

[0002] Traditional heat pump systems are equipped with an enthalpy increase function, such as by using an air-supply enthalpy increase compressor to open the enthalpy increase loop under corresponding modes and temperature conditions, thereby achieving an increase in the air supply volume and the energy efficiency level of the unit through the enthalpy increase loop.

[0003] However, during actual application, the inventors discovered that the heat pump system is not compatible with the enthalpy-increasing air supply requirements of both the cooling mode and the heating mode. In cooling mode, the refrigerant in the heat pump system needs to be throttled twice before reaching the compressor, and the pressure will be lower than the intermediate pressure after the two throttlings. However, at this time, the air supply of the compressor is still at a relatively high pressure, which will cause the refrigerant coming from the enthalpy-increasing loop to be unable to be replenished into the compressor due to its low pressure, which is equivalent to not playing the role of enthalpy-increasing air supply in cooling mode. In addition, in heating mode, although the heat pump system can achieve the function of enthalpy-increasing air supply, its enthalpy-increasing air supply effect is not good. Summary of the Invention

[0004] The present application provides a heat pump system, enthalpy-increasing air supply control method, device, equipment and storage medium, which solves the problem in the related art that the heat pump system is not compatible with the enthalpy-increasing air supply requirements of the cooling mode and the heating mode. This solution can achieve enthalpy-increasing air supply in both the cooling mode and the heating mode, and the effect of enthalpy-increasing air supply is better, which helps to improve the energy efficiency level of the unit.

[0005] In a first aspect, the present application provides a heat pump system, which includes a compressor, a gas-liquid separator, a shell and tube heat exchanger, a fin heat exchanger, a four-way valve, a plate heat exchanger, a first three-way pipe, a second three-way pipe, a first electronic expansion valve, a second electronic expansion valve, a first solenoid valve and a second solenoid valve.

[0006] The exhaust port of the compressor is connected to the first pipe port of the four-way valve;

[0007] The output end of the gas-liquid separator is connected to the first air inlet port of the compressor, and the input end of the gas-liquid separator is connected to the second pipe port of the four-way valve;

[0008] The first inlet and outlet ports of the shell and tube heat exchanger are connected to the third pipe port of the four-way valve, and the second inlet and outlet ports of the shell and tube heat exchanger are connected to the first end of the filter;

[0009] The first inlet and outlet ports of the finned heat exchanger are connected to the fourth pipe port of the four-way valve;

[0010] The first inlet and outlet port of the plate heat exchanger is connected to the second air inlet port of the compressor, the second inlet and outlet port of the plate heat exchanger is connected to the second end of the filter, the third inlet and outlet port of the plate heat exchanger is connected to the first end of the first three-way pipe, the second end of the first three-way pipe is connected to the first end of the first electronic expansion valve, the second end of the first electronic expansion valve is connected to the second inlet and outlet port of the fin heat exchanger, and the fourth inlet and outlet port of the plate heat exchanger is connected to the first end of the second three-way pipe through the second electronic expansion valve;

[0011] The first end of the first solenoid valve is connected to the second end of the first electronic expansion valve, and the second end of the first solenoid valve is connected to the second end of the second three-way pipe;

[0012] The first end of the second solenoid valve is connected to the third end of the first three-way pipe, and the second end of the second solenoid valve is connected to the third end of the second three-way pipe.

[0013] In a second aspect, the present application further provides an enthalpy-increasing air supply control method, which is applied to the heat pump system provided in the first aspect. The enthalpy-increasing air supply control method includes:

[0014] Determine the current operating mode;

[0015] Obtaining an opening parameter of a second electronic expansion valve in the heat pump system to determine an opening and closing state corresponding to the second electronic expansion valve;

[0016] When the second electronic expansion valve is in a closed state, closing the first solenoid valve and the second solenoid valve;

[0017] When the second electronic expansion valve is in the open state, the first solenoid valve and the second solenoid valve are controlled to be opened and closed according to the operation mode.

[0018] In a third aspect, the present application further provides an enthalpy-increasing air supply control device, which is applied to the heat pump system provided in the first aspect, and the enthalpy-increasing air supply control device includes:

[0019] a mode determination module configured to determine a current operating mode;

[0020] an opening and closing detection module, configured to obtain an opening parameter of the second electronic expansion valve in the heat pump system to determine an opening and closing state corresponding to the second electronic expansion valve;

[0021] a first valve control module, configured to close the first solenoid valve and the second solenoid valve when the second electronic expansion valve is in a closed state;

[0022] The second valve control module is configured to control the opening and closing of the first solenoid valve and the second solenoid valve according to the operation mode when the second electronic expansion valve is in the open state.

[0023] In a fourth aspect, the present application further provides a main control device, the main control device comprising:

[0024] one or more processors;

[0025] a storage device for storing one or more programs,

[0026] When one or more programs are executed by one or more processors, the one or more processors implement the enthalpy-increasing gas supplement control method of the present application.

[0027] In a fifth aspect, the present application further provides a storage medium storing computer-executable instructions, which, when executed by a processor, are used to execute the enthalpy-increasing gas supplement control method of the present application.

[0028] The heat pump system of the present application can provide a corresponding circuit so that the refrigerant can be replenished into the compressor to play the role of increasing enthalpy and replenishing air. Then, through the control of the first solenoid valve and the second solenoid valve, the main control device can form different enthalpy increase circuits for the refrigerant in the heat pump system corresponding to the current operating mode, so that the refrigerant coming from the enthalpy increase circuit does not need to undergo multiple throttling, and the pressure can meet the requirements so that the refrigerant can be replenished into the compressor, thereby being compatible with the needs of different operating modes for enthalpy increase and replenishing air, and thus enabling the heat pump system to realize the function of enthalpy increase and replenishing air under different operating modes, which helps to improve the energy efficiency level of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a heat pump system provided in one embodiment of the present application;

[0030] Figure 2 A schematic diagram of the steps of the enthalpy-increasing gas supply control method provided in one embodiment of the present application;

[0031] Figure 3 A schematic diagram of a refrigerant flow path in a heat pump system in a cooling mode according to an embodiment of the present application;

[0032] Figure 4 A schematic structural diagram of an enthalpy-increasing air supply control device provided in one embodiment of the present application;

[0033] Figure 5 A schematic diagram of the structure of a main control device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0034] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. It will be understood that the specific embodiments described herein are merely used to explain the embodiments of the present application, rather than to limit the embodiments of the present application. It should also be noted that, for ease of description, only portions related to the embodiments of the present application, rather than all structures, are shown in the accompanying drawings. After reading this specification, those skilled in the art should be able to understand that, as long as the technical features do not contradict each other, any combination of the technical features may constitute an optional embodiment.

[0035] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated before and after are in an "or" relationship. In the description of this application, "multiple" means two or more, and "several" means one or more.

[0036] Heat pump systems are usually equipped with an enthalpy increase function, which uses the enthalpy increase circuit to increase the amount of air supply, thereby improving the unit capacity and effectively controlling the exhaust. In actual applications, the inventors found that the system circulation can use the enthalpy increase circuit to replenish air and reduce exhaust during the heating process, but the refrigerant needs to go through two throttlings before it can reach the compressor during the cooling process. This will cause the enthalpy increase function to be incompatible with the enthalpy increase and air supply requirements of the heating mode and the cooling mode. Due to the two throttlings, the pressure after two throttlings in the cooling mode will be lower than the intermediate pressure, and at this time the compressor air supply is still at a higher pressure state, which will cause the refrigerant from the enthalpy increase circuit to be unable to replenish the compressor due to its low pressure, which is equivalent to not playing the role of enthalpy increase and air supply in the cooling mode.

[0037] In this regard, the present application provides a heat pump system, which can provide corresponding circuits in both cooling mode and heating mode so that refrigerant can be supplied to the compressor to increase enthalpy and replenish air. Figure 1 This is a structural schematic diagram of a heat pump system provided in one embodiment of the present application. As shown in the figure, the heat pump system includes a compressor 101, a gas-liquid separator 102, a shell and tube heat exchanger 103, a fin heat exchanger 104, a four-way valve 105, a plate heat exchanger 106, a filter 107, a first three-way pipe 201, a second three-way pipe 202, a first electronic expansion valve 203, a second electronic expansion valve 204, a first solenoid valve 205 and a second solenoid valve 206.

[0038] Four-way valve 105 is a control valve with four ports. In the heat pump system, the exhaust port of compressor 101 is connected to the first port of four-way valve 105, while the input of gas-liquid separator 102 is connected to the second port of four-way valve 105. The output of gas-liquid separator 102 is connected to the first intake port of compressor 101, and the second intake port of compressor 101 is connected to the first inlet and outlet ports of plate heat exchanger 106. The first inlet and outlet ports of tube-in-tube heat exchanger 103 are connected to the third port of four-way valve 105, the second inlet and outlet ports of tube-in-tube heat exchanger 103 are connected to the first end of filter 107, and the first inlet and outlet ports of finned heat exchanger 104 are connected to the fourth port of four-way valve 105.

[0039] The second end of the filter 107 is connected to the second inlet and outlet port of the plate heat exchanger 106, the third inlet and outlet port of the plate heat exchanger 106 is connected to the first end of the first three-way pipe 201, the second end of the first three-way pipe 201 is connected to the first end of the first electronic expansion valve 203, the second end of the first electronic expansion valve 203 is connected to the second inlet and outlet port of the fin heat exchanger 104, and the fourth inlet and outlet port of the plate heat exchanger 106 is connected to the first end of the second three-way pipe 202 through the second electronic expansion valve 204.

[0040] The first end of the first solenoid valve 205 is connected to the second end of the first electronic expansion valve 203, the second end of the first solenoid valve 205 is connected to the second end of the second three-way pipe 202, the first end of the second solenoid valve 206 is connected to the third end of the first three-way pipe 201, and the second end of the second solenoid valve 206 is connected to the third end of the second three-way pipe 202.

[0041] It can be understood that in this heat pump system, the first electronic expansion valve 203, the second electronic expansion valve 204, the first solenoid valve 205, the second solenoid valve 206, the first three-way pipe 201 and the second three-way pipe 202 arranged between the third inlet and outlet ports and the fourth inlet and outlet ports of the plate heat exchanger 106 can provide corresponding circuits corresponding to the heating mode and the cooling mode respectively.

[0042] For example, in cooling mode, the refrigerant can enter the plate heat exchanger 106 through the first solenoid valve 205, the second three-way pipe 202, and the second electronic expansion valve 204, and then be output from the plate heat exchanger 106 to the compressor 101. For another example, in heating mode, the refrigerant enters the plate heat exchanger 106 through the first three-way pipe 201, the second solenoid valve 206, the second three-way pipe 202, and the second electronic expansion valve 204, and then be output from the plate heat exchanger 106 to the compressor 101. In addition, the refrigerant can also flow into the finned heat exchanger through the first three-way pipe 201 and the first electronic expansion valve 203.

[0043] It can be seen that the heat pump system of this scheme can provide a corresponding circuit to allow the refrigerant to be replenished into the compressor to play the role of increasing enthalpy and replenishing air, thereby being compatible with the needs of different operating modes for increasing enthalpy and replenishing air, and helping to improve the energy efficiency level of the unit.

[0044] In addition, embodiments of the present application also provide a method for controlling enthalpy-increasing air supply, which is applied to the aforementioned heat pump system to achieve enthalpy-increasing air supply control in different operating modes by controlling the enthalpy-increasing circuit in the heat pump system. It is conceivable that the heat pump system can be controlled by a master control device, such as switching operating modes and controlling the opening and closing of valves. Figure 2 A schematic diagram of the steps of the enthalpy-increasing gas supplementation control method provided in one embodiment of the present application is shown as follows: Figure 2 As shown, in one embodiment, the main control device controls the opening and closing states of the first solenoid valve and the second solenoid valve according to the corresponding operating mode to complete the control of the enthalpy increase circuit, thereby achieving enthalpy increase and air supply. The specific steps include steps S110-S140:

[0045] Step S110: Determine the current operating mode.

[0046] Operating modes include cooling mode and heating mode. The master control device can select or switch the operating mode based on the control signal it receives. It is conceivable that the control signal can be provided to the master control device by the user touching the controller, or it can be sent to the master control device by the user through a terminal device. In this regard, the master control device can determine the current operating mode and adjust the enthalpy increase loop accordingly.

[0047] Step S120: Acquire the opening parameter of the second electronic expansion valve in the heat pump system to determine the corresponding opening and closing state of the second electronic expansion valve.

[0048] The master control device can control the opening of the second electronic expansion valve via an electrical signal. Optionally, in one embodiment, the master control device generates a corresponding electrical signal based on the regulated parameter to control the voltage or current applied to the electronic expansion valve, thereby controlling its opening. Furthermore, the master control device can control the opening of the second electronic expansion valve via a stepper motor. For example, in one embodiment, the master control device drives the stepper motor by providing a logic digital signal to control the movement of the valve needle of the electronic expansion valve, thereby controlling the opening of the electronic expansion valve. In this regard, the master control device can determine the opening parameter of the second electronic expansion valve and, thereby, determine the opening and closing state of the second electronic expansion valve, i.e., determine whether the second electronic expansion valve is currently open or closed.

[0049] Step S130: When the second electronic expansion valve is in the closed state, close the first solenoid valve and the second solenoid valve.

[0050] In this solution, the opening and closing states of the second electronic expansion valve also correspond to different control strategies. When the second electronic expansion valve is closed, the master control device closes the first and second solenoid valves. It is conceivable that the master control device can control the opening and closing of the first and second solenoid valves by outputting corresponding electrical signals to generate electromagnetic forces within the solenoid valves, thereby opening or closing the valves.

[0051] Step S140: When the second electronic expansion valve is in the open state, the first solenoid valve and the second solenoid valve are controlled to be opened and closed according to the operation mode.

[0052] When the second electronic expansion valve is open, the master control device controls the opening and closing of the first and second solenoid valves according to the operating mode. The master control device also sets different control strategies for different operating modes. The control strategies corresponding to both heating and cooling modes are used to control the opening and closing of the first and second solenoid valves.

[0053] Optionally, in some embodiments, when the main control device determines that the current operating mode is the heating mode, the main control device closes the first solenoid valve and opens the second solenoid valve. Figure 1 In the heat pump system, the main control device closes the first electric valve and opens the second solenoid valve in the heating mode, so that the refrigerant enters the plate heat exchanger through the first three-way pipe, the second solenoid valve, the second three-way pipe and the second electronic expansion valve, and is then output from the plate heat exchanger to the compressor.

[0054] When the main control device determines that the current operating mode is the cooling mode, the main control device opens the first solenoid valve and closes the second solenoid valve. Figure 1 In the heat pump system, the main control device opens the first electric valve and closes the second solenoid valve in the cooling mode, so that the refrigerant can enter the plate heat exchanger through the first solenoid valve, the second three-way pipe and the second electronic expansion valve, and then be output from the plate heat exchanger to the compressor.

[0055] It can be seen that by controlling the first solenoid valve and the second solenoid valve, the main control device can form different enthalpy increase circuits for the refrigerant in the heat pump system according to the current operating mode, so that the refrigerant coming from the enthalpy increase circuit does not need to undergo multiple throttling, and the pressure can meet the requirements so that the refrigerant can be replenished into the compressor, thereby enabling the heat pump system to achieve the function of enthalpy increase and air replenishment under different operating modes, which helps to improve the energy efficiency level of the unit.

[0056] For example, taking the cooling mode as an example, Figure 3 A schematic diagram of the path of refrigerant flowing through a heat pump system in a cooling mode according to an embodiment of the present application is shown in FIG. Figure 3As shown, the arrowed line represents the flow direction of the refrigerant. In cooling mode, the main control device controls the first solenoid valve 205 to open and the second solenoid valve 206 to close. The flow path of the refrigerant is as follows: after the refrigerant flows out of the finned heat exchanger 104, it passes through the first solenoid valve 205, the second three-way pipe 202, and the second electronic expansion valve 204 in sequence into the plate heat exchanger 106, and is then output from the plate heat exchanger 106 to the compressor 101. It can be seen that in the circulation in cooling mode, the refrigerant can be replenished into the compressor after being throttled in sequence, avoiding the situation where the pressure is too low due to secondary throttling and the air cannot be replenished, and effectively achieving enthalpy-increasing air replenishment.

[0057] In some embodiments, when the second electronic expansion valve is in the open state, the main control device can further control the opening of the first electronic expansion valve and the second electronic expansion valve in the heating mode, thereby improving the enthalpy increase and air supply effect in the heating mode. In this regard, based on the above embodiment, the enthalpy increase and air supply control method further includes the following steps S150-S160:

[0058] Step S150: If the operation mode is heating mode, obtain the current ambient temperature.

[0059] Step S160: Control the opening of the first electronic expansion valve and the second electronic expansion valve based on the ambient temperature.

[0060] It is understood that when the second electronic expansion valve is open, the master control device can control the opening of the first and second electronic expansion valves for heating mode. Specifically, when the operating mode is determined to be heating mode, the master control device also needs to obtain the current ambient temperature. It is conceivable that the master control device can detect the ambient temperature using a configured temperature sensor. Furthermore, the master control device controls the opening of the first and second electronic expansion valves based on the ambient temperature.

[0061] Optionally, in one embodiment, the master control device pre-divides the ambient temperature into multiple temperature ranges corresponding to the ambient temperature, each corresponding to a different opening adjustment strategy. After determining the current ambient temperature, the master control device compares the ambient temperature with the ranges corresponding to the multiple temperature ranges, thereby determining the target ambient temperature range to which the current ambient temperature belongs from the multiple temperature ranges. In this regard, the master control device may adjust the openings of the first and second electronic expansion valves according to the opening adjustment strategies corresponding to the target ambient temperature ranges. For example, within the same ambient temperature range, the first and second electronic expansion valves may be controlled at different opening values. When the ambient temperature is higher, the evaporation capacity of the heat pump system unit is better, the opening of the first electronic expansion valve is larger, and the opening of the second electronic expansion valve is smaller. When the ambient temperature is lower, the evaporation capacity of the heat pump system unit is worse, the opening of the first electronic expansion valve is smaller, and the opening of the second electronic expansion valve is larger.

[0062] Optionally, in one embodiment, in the heating mode, when the first electronic expansion valve is opened at the maximum opening value, the main control device controls the second electronic expansion valve to open at the minimum opening value, thereby reducing the exhaust through the second electronic expansion valve, and the first electronic expansion valve is fully opened, so that the circulation volume is sufficient to increase the subcooling degree of the unit, thereby improving the energy efficiency of the unit.

[0063] Therefore, in the heating mode, the main control device can adjust the opening of the first electronic expansion valve and the second electronic expansion valve according to the change of the ambient temperature, thereby improving the enthalpy increase and air supply effect, which helps to improve the energy efficiency level of the unit.

[0064] It should be noted that, in one embodiment, the main control device can also be determined based on the difference between the ambient temperature and the temperature to be adjusted by the system in the corresponding operating mode. For example, the larger the difference, the smaller the opening of the first electronic expansion valve, and the larger the opening of the second electronic expansion valve; the smaller the difference, the larger the opening of the first electronic expansion valve, and the smaller the opening of the second electronic expansion valve.

[0065] In one embodiment, the ambient temperature ranges include a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range, which are non-overlapping and have decreasing values. Specifically, the values ​​in the first temperature range are all greater than those in the second temperature range, the values ​​in the second temperature range are all greater than those in the third temperature range, and the values ​​in the third temperature range are all greater than those in the fourth temperature range. Different ranges correspond to different opening adjustment strategies. After determining the target ambient temperature range to which the current ambient temperature belongs, the master control device selects the corresponding strategy to adjust the openings of both the first and second electronic expansion valves.

[0066] When the target ambient temperature range is the first temperature range, the first electronic expansion valve is controlled to open at a first opening value, and the second electronic expansion valve is controlled to open at a minimum opening value, where the first opening value is the sum of the minimum opening value and the first preset opening value.

[0067] When the target ambient temperature range is the second temperature range, the first electronic expansion valve is controlled to open at the second opening value, the second electronic expansion valve is controlled to open at the minimum opening value, and the second opening value is controlled to be the sum of the minimum opening value and the second preset opening value, and the second preset opening value is smaller than the first preset opening value.

[0068] When the target ambient temperature range is the third temperature range, the first electronic expansion valve is controlled to open at the minimum opening value, and the second electronic expansion valve is controlled to open at the second opening value.

[0069] When the target ambient temperature range is the fourth temperature range, the first electronic expansion valve is controlled to open at the minimum opening value, and the second electronic expansion valve is controlled to open at the first opening value.

[0070] It can be understood that when the ambient temperature is higher, the evaporation capacity of the unit is better, and the second electronic expansion valve can be opened at the minimum opening value; when the ambient temperature is lower, the evaporation capacity of the unit is worse, and accordingly, the opening of the second electronic expansion valve should be increased to provide more air supply, thereby improving the air supply effect. Exemplarily, the first temperature interval is an interval with a temperature value greater than 0°C, the second temperature interval is an interval with a temperature value greater than -15°C and less than or equal to 0°C, the third temperature interval is an interval with a temperature value greater than -25°C and less than or equal to 15°C, and the fourth temperature interval is an interval with a temperature value less than or equal to -25°C. The first preset opening value is 60 steps, the second preset opening value is 30 steps, and the minimum opening values ​​of the first electronic expansion valve and the second electronic expansion valve are both N min In this regard, the opening adjustment corresponding to each ambient temperature range is expressed in a table form. The opening N of the first electronic expansion valve EXV1 and the opening degree N of the first electronic expansion valve EXV2 As shown in the following table:

[0071] Ambient temperature / ℃ ≤-25 (-25,-15] (-15,0] >0 <![CDATA[N EXV1 ]]> <![CDATA[N min ]]> <![CDATA[N min ]]> <![CDATA[N min +30]]> <![CDATA[N min +60]]> <![CDATA[N EXV2 ]]> <![CDATA[N min +60]]> <![CDATA[N min +30]]> <![CDATA[N min ]]> <![CDATA[N min ]]>

[0072] Based on the above table, after determining the range to which the ambient temperature belongs, the main control device can adjust the first electronic expansion valve and the second electronic expansion valve according to the opening value corresponding to the range to further improve the effect of increasing enthalpy and replenishing gas.

[0073] Figure 4This is a schematic diagram of the structure of a heat-increasing air supply control device according to one embodiment of the present application. This device is used to implement the heat-increasing air supply control method provided in the above embodiment and includes the corresponding functional modules and beneficial effects of the method. As shown in the figure, the heat-increasing air supply control device includes a mode determination module 401, an opening and closing detection module 402, a first valve control module 403, and a second valve control module 404.

[0074] The mode determination module 401 is configured to determine the current operating mode;

[0075] The opening and closing detection module 402 is configured to obtain the opening parameter of the second electronic expansion valve in the heat pump system to determine the corresponding opening and closing state of the second electronic expansion valve;

[0076] The first valve control module 403 is configured to close the first solenoid valve and the second solenoid valve when the second electronic expansion valve is in the closed state;

[0077] The second valve control module 404 is configured to control the opening and closing of the first solenoid valve and the second solenoid valve according to the operation mode when the second electronic expansion valve is in the open state.

[0078] Based on the above embodiment, the second valve control module 404 is specifically configured as follows:

[0079] When it is determined that the operating mode is the heating mode, the first solenoid valve is closed and the second solenoid valve is opened;

[0080] When it is determined that the operating mode is the cooling mode, the first solenoid valve is opened and the second solenoid valve is closed.

[0081] On the basis of the above embodiment, when the second electronic expansion valve is in an open state, the device further includes a third valve control module, and the third valve control module is configured as follows:

[0082] If the operating mode is heating mode, obtain the current ambient temperature;

[0083] The openings of the first electronic expansion valve and the second electronic expansion valve are controlled based on the ambient temperature.

[0084] Based on the above embodiment, the third valve control module is specifically configured as follows:

[0085] Determine the target ambient temperature range based on the ambient temperature and the corresponding ranges of multiple preset ambient temperature ranges;

[0086] The openings of the first electronic expansion valve and the second electronic expansion valve are adjusted according to the opening adjustment strategy corresponding to the target ambient temperature range.

[0087] Based on the above embodiment, the ambient temperature range includes a first temperature range, a second temperature range, a third temperature range, and a fourth temperature range that do not overlap and have decreasing values ​​in sequence. The third valve control module is further specifically configured as follows:

[0088] When the target ambient temperature range is the first temperature range, the first electronic expansion valve is controlled to open at a first opening value, and the second electronic expansion valve is controlled to open at a minimum opening value, where the first opening value is the sum of the minimum opening value and the first preset opening value;

[0089] When the target ambient temperature range is the second temperature range, the first electronic expansion valve is controlled to open at the second opening value, the second electronic expansion valve is controlled to open at the minimum opening value, and the second opening value is controlled to be the sum of the minimum opening value and the second preset opening value, and the second preset opening value is smaller than the first preset opening value;

[0090] When the target ambient temperature range is the third temperature range, the first electronic expansion valve is controlled to open at the minimum opening value, and the second electronic expansion valve is controlled to open at the second opening value;

[0091] When the target ambient temperature range is the fourth temperature range, the first electronic expansion valve is controlled to open at the minimum opening value, and the second electronic expansion valve is controlled to open at the first opening value.

[0092] Based on the above embodiment, the third valve control module is further configured as follows:

[0093] In the heating mode, when the first electronic expansion valve is opened at the maximum opening value, the second electronic expansion valve is controlled to be opened at the minimum opening value.

[0094] It is worth noting that in the embodiment of the above-mentioned device, the modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the embodiments of this application.

[0095] Figure 5This is a structural diagram of a main control device provided in an embodiment of the present application. The device is used to execute the enthalpy-increasing and air-supplying control method provided in the above embodiment, and has functional modules and beneficial effects corresponding to the execution method. As shown in the figure, the main control device includes a processor 501, a memory 502, an input device 503 and an output device 504. The number of processors 501 can be one or more, and the figure takes one processor 501 as an example; the processor 501, the memory 502, the input device 503 and the output device 504 can be connected via a bus or other means, and the figure takes the connection via a bus as an example. The memory 502, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the enthalpy-increasing and air-supplying control method in the embodiment of the present application. The processor 501 executes the corresponding various functional applications and data processing by running the software programs, instructions and modules stored in the memory 502, that is, realizes the above-mentioned enthalpy-increasing and air-supplying control method.

[0096] The memory 502 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data recorded or created during use, etc. In addition, the memory 502 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 502 may further include a memory remotely located relative to the processor 501, and these remotely located memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0097] The input device 503 can be used to input corresponding digital or character information to the processor 501, and generate key signal input related to the user settings and function control of the device; the output device 504 can be used to send or display key signal output related to the user settings and function control of the device.

[0098] An embodiment of the present application further provides a storage medium storing computer-executable instructions, which, when executed by a processor, are used to perform relevant operations in the enthalpy-increasing gas supplement control method provided in any embodiment of the present application.

[0099] Computer-readable storage media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0100] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0101] Note that the above are only preferred embodiments of the present application and the technical principles employed. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present application. The scope of the present application is determined by the scope of the appended claims.

Claims

1. A heat pump system, characterized in that: include: A compressor, wherein the exhaust port of the compressor is connected to the first pipe port of the four-way valve; a gas-liquid separator, wherein the output end of the gas-liquid separator is connected to the first air inlet port of the compressor, and the input end of the gas-liquid separator is connected to the second pipe port of the four-way valve; a shell and tube heat exchanger, wherein the first inlet and outlet ports of the shell and tube heat exchanger are connected to the third pipe port of the four-way valve, and the second inlet and outlet ports of the shell and tube heat exchanger are connected to the first end of the filter; a finned heat exchanger, wherein the first inlet and outlet ports of the finned heat exchanger are connected to the fourth pipe port of the four-way valve; a plate heat exchanger, wherein the first inlet and outlet port of the plate heat exchanger is connected to the second air inlet port of the compressor, the second inlet and outlet port of the plate heat exchanger is connected to the second end of the filter, the third inlet and outlet port of the plate heat exchanger is connected to the first end of a first three-way pipe, the second end of the first three-way pipe is connected to the first end of a first electronic expansion valve, the second end of the first electronic expansion valve is connected to the second inlet and outlet port of the finned heat exchanger, and the fourth inlet and outlet port of the plate heat exchanger is connected to the first end of a second three-way pipe through a second electronic expansion valve; a first solenoid valve, wherein a first end of the first solenoid valve is connected to a second end of the first electronic expansion valve, and a second end of the first solenoid valve is connected to a second end of the second three-way pipe; A second solenoid valve, wherein a first end of the second solenoid valve is connected to the third end of the first three-way pipe, and a second end of the second solenoid valve is connected to the third end of the second three-way pipe.

2. A method for increasing enthalpy and replenishing air control, characterized in that: Applied to the heat pump system according to claim 1, the enthalpy-increasing air supply control method comprises: Determine the current operating mode; Obtaining an opening parameter of a second electronic expansion valve in the heat pump system to determine an opening or closing state corresponding to the second electronic expansion valve; When the second electronic expansion valve is in a closed state, closing the first solenoid valve and the second solenoid valve; When the second electronic expansion valve is in the open state, the first solenoid valve and the second solenoid valve are controlled to be on and off according to the operation mode.

3. The enthalpy-increasing air supply control method according to claim 2, characterized in that: When the second electronic expansion valve is in the open state, the first solenoid valve and the second solenoid valve are controlled to be on and off according to the operation mode, including: When it is determined that the operating mode is the heating mode, closing the first solenoid valve and opening the second solenoid valve; When it is determined that the operating mode is the cooling mode, the first solenoid valve is opened and the second solenoid valve is closed.

4. The enthalpy-increasing air supply control method according to claim 2 or 3, characterized in that: When the second electronic expansion valve is in an open state, the method further includes: If the operating mode is heating mode, obtaining the current ambient temperature; The openings of the first electronic expansion valve and the second electronic expansion valve are controlled based on the ambient temperature.

5. The enthalpy-increasing air supply control method according to claim 4, characterized in that: The controlling the opening of the first electronic expansion valve and the second electronic expansion valve based on the ambient temperature includes: Determine the target ambient temperature range based on the ambient temperature and the corresponding ranges of the preset multiple ambient temperature ranges; The openings of the first electronic expansion valve and the second electronic expansion valve are adjusted according to the opening adjustment strategy corresponding to the target ambient temperature range.

6. The enthalpy-increasing air supply control method according to claim 5, characterized in that: The ambient temperature intervals include a first temperature interval, a second temperature interval, a third temperature interval, and a fourth temperature interval that do not overlap with each other and whose values ​​decrease in sequence; The adjusting the openings of the first electronic expansion valve and the second electronic expansion valve according to the opening adjustment strategy corresponding to the target ambient temperature range includes: When the target ambient temperature range is the first temperature range, the first electronic expansion valve is controlled to open at a first opening value, and the second electronic expansion valve is controlled to open at a minimum opening value, where the first opening value is the sum of the minimum opening value and a first preset opening value; When the target ambient temperature range is the second temperature range, the first electronic expansion valve is controlled to open at the second opening value, the second electronic expansion valve is controlled to open at the minimum opening value, and the second opening value is controlled to be the sum of the minimum opening value and a second preset opening value, where the second preset opening value is smaller than the first preset opening value; When the target ambient temperature range is the third temperature range, controlling the first electronic expansion valve to open at the minimum opening value, and controlling the second electronic expansion valve to open at the second opening value; When the target ambient temperature range is the fourth temperature range, the first electronic expansion valve is controlled to open at the minimum opening value, and the second electronic expansion valve is controlled to open at the first opening value.

7. The enthalpy-increasing air supply control method according to claim 4, characterized in that: After controlling the openings of the first electronic expansion valve and the second electronic expansion valve based on the ambient temperature, the method further includes: In the heating mode, when the first electronic expansion valve is opened at a maximum opening value, the second electronic expansion valve is controlled to be opened at a minimum opening value.

8. An enthalpy-increasing air supply control device, characterized in that: Applied to the heat pump system according to claim 1, the enthalpy-increasing air supply control device comprises: a mode determination module configured to determine a current operating mode; an opening and closing detection module, configured to obtain an opening parameter of a second electronic expansion valve in the heat pump system to determine an opening and closing state corresponding to the second electronic expansion valve; a first valve control module, configured to close the first solenoid valve and the second solenoid valve when the second electronic expansion valve is in a closed state; The second valve control module is configured to control the opening and closing of the first solenoid valve and the second solenoid valve according to the operation mode when the second electronic expansion valve is in the open state.

9. A master control device, characterized in that: include: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the one or more processors to implement the enthalpy-increasing gas supplement control method as described in any one of claims 2-7.

10. A storage medium storing computer executable instructions, characterized in that: When the computer executable instructions are executed by a processor, they are used to perform the enthalpy-increasing gas supplement control method according to any one of claims 2 to 7.

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