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

Abstract

The invention provides a heat pump system, an enthalpy-increasing air supply control method, device and equipment and a storage medium, relates to the technical field of heat pumps, and solves the problem that a heat pump system in the related technology cannot be compatible with enthalpy-increasing air supply requirements of a refrigeration mode and a heating mode. According to the heat pump system, the corresponding loops can be provided so that the refrigerant can be supplemented into the compressor, the enthalpy increasing and air supplementing effects can be achieved, then the main control equipment can correspondingly form different enthalpy increasing loops for the refrigerant in the heat pump system corresponding to the current operation mode by controlling the first electromagnetic valve and the second electromagnetic valve, and the enthalpy increasing and air supplementing effects can be achieved. Therefore, the refrigerant from the enthalpy increasing loop does not need to be throttled for multiple times, the pressure can meet the requirement so that the refrigerant can be supplemented into the compressor, the requirements of different operation modes for enthalpy increasing and air supplementing are met, and then the heat pump system can achieve the enthalpy increasing and air supplementing function in the different operation modes; and the energy efficiency level of the unit can be improved.

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, a 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, in actual application, the inventors found that the heat pump system is not compatible with the enthalpy-increasing air replenishment requirements of the cooling mode and the heating mode. In the cooling mode, the refrigerant in the heat pump system needs to go through two throttlings before it can reach the compressor, and the pressure will be lower than the intermediate pressure after two throttlings. However, at this time, the compressor air replenishment is still in a state of relatively high pressure, which will cause the refrigerant from the enthalpy-increasing loop to be unable to replenish the compressor due to its low pressure, which is equivalent to not playing the role of enthalpy-increasing air replenishment in the cooling mode. In addition, in the heating mode, although the heat pump system can realize the function of enthalpy-increasing air replenishment, the effect of enthalpy-increasing air replenishment is not good. Summary of the invention

[0004] The present application provides a heat pump system, an enthalpy-added air replenishment 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-added air replenishment requirements of the cooling mode and the heating mode. The present solution can achieve enthalpy-added air replenishment in both the cooling mode and the heating mode, and the effect of enthalpy-added air replenishment 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 port of the shell and tube heat exchanger is connected to the third pipe port of the four-way valve, and the second inlet and outlet port of the shell and tube heat exchanger is connected to the first end of the filter;

[0009] The first inlet and outlet port of the finned heat exchanger is 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 supplement control method, which is applied to the heat pump system provided in the first aspect, and the enthalpy-increasing air supplement control method comprises:

[0014] Determine the current operating mode;

[0015] 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;

[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 an 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-increasing control device, which is applied to the heat pump system provided in the first aspect, and the enthalpy-increasing air-increasing control device comprises:

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

[0020] An opening and closing detection module is 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;

[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 an 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 also provides a storage medium storing computer executable instructions, which, when executed by a processor, are used to execute the enthalpy increase and air supply 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 increasing circuits for the refrigerant in the heat pump system corresponding to the current operating mode, so that the refrigerant coming from the enthalpy increasing 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 increasing and replenishing air, and thus the heat pump system can realize the function of enthalpy increasing 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 diagram of the structure 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 supplementation control method provided in one embodiment of the present application;

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

[0032] Figure 4 A schematic diagram of the structure 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 is to be understood that the specific embodiments described herein are only 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 the parts related to the embodiments of the present application rather than all structures are shown in the accompanying drawings, and those skilled in the art should be able to think of it after reading the specification of this application that as long as the technical features do not contradict each other, any combination of the technical features can constitute an optional implementation method.

[0035] The terms "first", "second", etc. in the specification and claims of the present 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 when 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 a class, 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 represents that the objects associated before and after are in an "or" relationship. In the description of the present application, "multiple" means two or more, and "several" means one or more.

[0036] The heat pump system is usually equipped with an enthalpy increase function, which uses the enthalpy increase circuit to increase the amount of air replenishment, thereby improving the unit capacity and effectively controlling the exhaust. In actual applications, the inventor found that the system cycle 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 refrigeration process. This will cause the enthalpy increase function to be incompatible with the enthalpy increase and air replenishment requirements of the heating mode and the cooling mode. Due to the two throttlings, the pressure in the cooling mode will be lower than the intermediate pressure after two throttlings, and the compressor air replenishment point is still in a state of higher pressure at this time, 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 replenishment 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 added to the compressor to increase enthalpy and replenish air. Figure 1 A structural schematic diagram of a heat pump system provided for an 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] The four-way valve 105 is a control valve with four pipe ports. In the heat pump system, the exhaust port of the compressor 101 is connected to the first pipe port of the four-way valve 105, and the input end of the gas-liquid separator 102 is connected to the second pipe port of the four-way valve 105. The output end of the gas-liquid separator 102 is connected to the first air inlet port of the compressor 101, and the second air inlet port of the compressor 101 is connected to the first inlet and outlet port of the plate heat exchanger 106. The first inlet and outlet port of the shell and tube heat exchanger 103 is connected to the third pipe port of the four-way valve 105, the second inlet and outlet port of the shell and tube heat exchanger 103 is connected to the first end of the filter 107, and the first inlet and outlet port of the fin heat exchanger 104 is connected to the fourth pipe port of the 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 the 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 via 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 via 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 via 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 added to 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, the embodiment of the present application also provides a method for controlling enthalpy-increasing air supply, which is applied to the above-mentioned heat pump system to realize enthalpy-increasing air supply control in different operating modes by controlling the enthalpy-increasing loop in the heat pump system. It is conceivable that the heat pump system can be controlled by the main control device, such as switching the operating mode, controlling the opening and closing of the valve, etc. 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 in FIG. 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 operation mode to complete the control of the enthalpy increase circuit, thereby realizing enthalpy increase gas replenishment, and the specific steps include steps S110-S140:

[0045] Step S110: determine the current operation mode.

[0046] The operation mode includes a cooling mode and a heating mode. The main control device can select or switch the operation mode according to the received control signal. It is conceivable that the control signal can be provided by the controller to the main control device by the user through touching the controller, or it can be sent by the user to the main control device through the terminal device. In this regard, the main control device can determine the current operation mode so as to adjust the enthalpy increase loop according to the operation mode.

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

[0048] The main control device can control the opening of the second electronic expansion valve through an electrical signal. Optionally, in one embodiment, the main control device generates a corresponding electrical signal according to the adjusted parameter to control the voltage or current applied to the electronic expansion valve, thereby achieving the effect of controlling its opening. In addition, the main control device can also control the opening of the second electronic expansion valve by driving a stepper motor. For example, in one embodiment, the main control device drives the stepper motor by providing a logical digital signal to the stepper motor to control the movement of the valve needle of the electronic expansion valve to achieve control of the opening of the electronic expansion valve. In this regard, the main control device can determine the opening parameter of the second electronic expansion valve, and then determine the opening and closing state of the second electronic expansion valve, that is, determine whether the second electronic expansion valve is currently in an open state or a closed state.

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

[0050] In this solution, the opening and closing state of the second electronic expansion valve also corresponds to different control strategies. When the second electronic expansion valve is in the closed state, the main control device closes the first solenoid valve and the second solenoid valve. It can be imagined that for the opening and closing control of the first solenoid valve and the second solenoid valve, the main control device can output a corresponding electrical signal to form an electromagnetic force in the solenoid valve to open the valve, or close the solenoid valve.

[0051] Step S140: When the second electronic expansion valve is in an 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 in an open state, the main control device controls the opening and closing of the first solenoid valve and the second solenoid valve according to the operation mode. In this regard, the main control device also sets different control strategies corresponding to different operation modes, wherein the control strategies corresponding to the heating mode and the cooling mode are used to control the opening and closing of the first solenoid valve and the second solenoid valve.

[0053] Optionally, in some embodiments, when the main control device determines that the current operation 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 operation 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 provided by an embodiment of the present application is shown in FIG. Figure 3As shown, the line segment with an arrow indicates the flow direction of the refrigerant. In the cooling mode, the main control device controls the first solenoid valve 205 to open and close the second solenoid valve 206. The flow path of the refrigerant is as follows: after the refrigerant flows out of the finned heat exchanger 104, it enters the plate heat exchanger 106 through the first solenoid valve 205, the second three-way pipe 202 and the second electronic expansion valve 204 in sequence, and then outputs from the plate heat exchanger 106 to the compressor 101. It can be seen that in the cycle under the cooling mode, the refrigerant can be replenished into the compressor after throttling in sequence, avoiding the situation where the pressure is too low and the air cannot be replenished due to secondary throttling, and effectively realizing the enthalpy increase air replenishment.

[0057] In some embodiments, when the second electronic expansion valve is in an 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, so as to improve the enthalpy-increasing gas supplement effect in the heating mode. In this regard, based on the above embodiment, the enthalpy-increasing gas supplement control method further includes the following steps S150-S160:

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

[0059] Step S160: Based on the ambient temperature, the opening of the first electronic expansion valve and the second electronic expansion valve are controlled.

[0060] It is understandable that when the second electronic expansion valve is in the open state, the main control device can control the opening of the first electronic expansion valve and the second electronic expansion valve for the heating mode. Specifically, when it is determined that the operating mode is the heating mode, the main control device also needs to obtain the current ambient temperature. It is conceivable that for obtaining the ambient temperature, the main control device can detect the ambient temperature through a configured temperature sensor. Then, the main control device controls the opening of the first electronic expansion valve and the second electronic expansion valve according to the ambient temperature.

[0061] Optionally, in one embodiment, the main control device is pre-divided into multiple ambient temperature intervals corresponding to the ambient temperature, and each ambient temperature interval corresponds to a different opening adjustment strategy. After the main control device determines the current ambient temperature, the main control device determines the target ambient temperature interval to which the current ambient temperature belongs from the multiple ambient temperature intervals according to the ambient temperature and the preset multiple ambient temperature intervals corresponding interval ranges, that is, compares the ambient temperature with the corresponding interval ranges of each ambient temperature interval. In this regard, the main control device can adjust the opening of the first electronic expansion valve and the second electronic expansion valve according to the opening adjustment strategy corresponding to the target ambient temperature interval. For example, the first electronic expansion valve and the second electronic expansion valve are controlled respectively with different opening values ​​in the same ambient temperature interval. When the ambient temperature is higher, the evaporation capacity of the unit in the heat pump system 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 unit in the heat pump system 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 be opened 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 replenishment 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 interval includes a first temperature interval, a second temperature interval, a third temperature interval, and a fourth temperature interval that do not overlap and whose values ​​decrease in sequence, that is, the values ​​of the first temperature interval are all greater than the values ​​of the second temperature interval, the values ​​of the second temperature interval are all greater than the values ​​of the third temperature interval, and the values ​​of the third temperature interval are all greater than the values ​​of the fourth temperature interval. In this regard, different intervals correspond to different opening adjustment strategies. After determining the target ambient temperature interval to which the current ambient temperature belongs, the main control device selects the corresponding strategy to adjust the opening of both the first electronic expansion valve and the second electronic expansion valve.

[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, and 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 interval is the third temperature interval, the first electronic expansion valve is controlled to open at a minimum opening value, and the second electronic expansion valve is controlled to open at a second opening value.

[0069] When the target ambient temperature interval is the fourth temperature interval, 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 with 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 replenishment, thereby improving the air replenishment 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 shown in a table, and 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 interval 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 interval to further enhance the effect of increasing enthalpy and replenishing gas.

[0073] Figure 4The schematic diagram of the structure of the enthalpy-increasing air-increasing control device provided in one embodiment of the present application is used to execute the enthalpy-increasing air-increasing control method provided in the above embodiment, and has the corresponding functional modules and beneficial effects of the execution method. As shown in the figure, the enthalpy-increasing air-increasing 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 operation 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 opening and closing state corresponding to 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 a 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 an 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 operation 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 operation 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 operation mode is heating mode, obtain the current ambient temperature;

[0083] Based on the ambient temperature, the opening degrees of the first electronic expansion valve and the second electronic expansion valve are controlled.

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

[0085] Determine the target ambient temperature interval according to the ambient temperature and the corresponding interval ranges of the preset multiple ambient temperature intervals;

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

[0087] On the basis of the above embodiment, the ambient temperature interval includes a first temperature interval, a second temperature interval, a third temperature interval and a fourth temperature interval which are non-overlapping and whose values ​​decrease in sequence, and the third valve control module is further specifically configured as follows:

[0088] When the target ambient temperature interval is the first temperature interval, 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, and the first opening value is the sum of the minimum opening value and the first preset opening value;

[0089] When the target ambient temperature interval is the second temperature interval, 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 less than the first preset opening value;

[0090] When the target ambient temperature interval is the third temperature interval, 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 interval is the fourth temperature interval, 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:

[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 protection scope of the embodiments of the present application.

[0095] Figure 5The structural diagram of the main control device provided in one embodiment of the present application is used to execute the enthalpy-added air-supply control method provided in the above embodiment, and has the 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 one processor 501 is taken as an example in the figure; the processor 501, the memory 502, the input device 503 and the output device 504 can be connected by a bus or other means, and the figure takes the connection through 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-added air-supply control method in the embodiment of the present application. The processor 501 executes various corresponding functional applications and data processing by running the software programs, instructions and modules stored in the memory 502, that is, realizing the above-mentioned enthalpy-added air-supply 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 arranged relative to the processor 501, and these remotely arranged 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 to 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 also provides a storage medium storing computer executable instructions, which, when executed by a processor, are used to perform relevant operations in the enthalpy increase and air supply 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. 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 disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0100] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0101] Note that the above are only preferred embodiments of the present application and the technical principles used. 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 is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and 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 a first inlet and outlet port of the shell and tube heat exchanger is connected to a third pipe port of the four-way valve, and a second inlet and outlet port of the shell and tube heat exchanger is connected to a first end of a 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 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; 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 a third end of the first three-way pipe, and a second end of the second solenoid valve is connected to a third end of the second three-way pipe.

2. A method for controlling enthalpy-increasing gas supply, characterized in that: Applied to the heat pump system as claimed in claim 1, the enthalpy-increasing air supplement control method comprises: Determine the current operating mode; Acquire 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; 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 an open state, the first solenoid valve and the second solenoid valve are controlled to be opened and closed 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 an 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 operation mode is the heating mode, closing the first solenoid valve and opening the second solenoid valve; When it is determined that the operation 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 operation mode is the heating mode, obtaining the current ambient temperature; Based on the ambient temperature, the opening degrees of the first electronic expansion valve and the second electronic expansion valve are controlled.

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 interval according to the ambient temperature and the corresponding interval ranges of the preset multiple ambient temperature intervals; According to the opening adjustment strategy corresponding to the target ambient temperature range, the openings of the first electronic expansion valve and the second electronic expansion valve are adjusted.

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 which are non-overlapping 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 interval is the first temperature interval, 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, wherein 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, and the second preset opening value is smaller than the first preset opening value; When the target ambient temperature interval is the third temperature interval, 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 interval is the fourth temperature interval, 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 opening 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 as claimed in 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 an 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, the one or more processors implement the enthalpy-added air 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-added air supplement control method according to any one of claims 2 to 7.

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