Method for adjusting initial opening degree of injection valve in heat pump unit and heat pump unit

Abstract

The invention discloses a method for adjusting the initial opening degree of an injection valve in a heat pump unit and the heat pump unit. The method is applied to the heat pump unit, the temperature of the environment where the heat pump unit is located is obtained, and the initial opening degree range of the injection valve in the heat pump unit is determined based on the environment temperature; and the initial opening degree of the injection valve is adjusted according to the initial opening degree range. According to the method, the initial opening range of the injection valve is determined according to the environment temperature based on the environment temperature of the heat pump unit, and the injection valve is subjected to initial opening adjustment treatment based on the initial opening range, so that the injection valve can be subjected to more reasonable initial opening adjustment, and the operation stability of the heat pump unit is improved.

Description

Technical Field

[0001] This application relates to the technical field of heat pumps, and specifically relates to a method for adjusting the initial opening degree of an injection valve in a heat pump unit and a heat pump unit. Background Art

[0002] The injection valve plays a crucial role in a heat pump unit. It is usually used to adjust the flow rate of refrigerant or working fluid to ensure the stable operation of the heat pump unit under different working conditions. During the operation of the injection valve, the initial opening degree, as a key parameter, has an important impact on the response speed of the valve, the flow control accuracy, and the overall stability of the system. It directly affects the performance and stability of the unit during startup and the initial stage of operation. Among them, the initial opening degree of the injection valve refers to the initial opening size when the valve starts to open after being in a fully closed state. This opening size determines the initial flow area of the fluid passing through the valve, thereby affecting parameters such as the flow rate, pressure, and speed of the fluid.

[0003] When the initial opening degree of the injection valve is set too large, the flow rate of the refrigerant or working fluid will increase rapidly, which will cause the current on the motor or related components driving the injection valve to increase rapidly. If the current exceeds the preset protection threshold, the unit may trigger the current protection mechanism, resulting in shutdown or alarm. This may reduce the operating frequency of the compressor, and the reduction of the compressor operating frequency will directly lead to a decline in the overall performance of the unit, making it unable to meet the expected refrigeration or heating demand, and thus affecting the refrigeration or heating capacity of the entire unit.

[0004] When the initial opening degree of the injection valve is set too small, the flow rate of the refrigerant or working fluid will be restricted. The too-low flow rate causes the refrigerant in the injection path to overheat during heat exchange and continuously jet gas, increasing the useless work of the compressor. Moreover, too small an initial opening degree may also cause the injection valve to respond slowly during the adjustment process. When the working conditions of the unit change, the injection valve may not be able to adjust to the optimal opening degree in time, thus affecting the stability and performance of the unit. In addition, the adjustment of the injection valve may also be affected by other factors such as the operating frequency of the compressor and the ambient temperature. If the initial opening degree is too small, these external factors may further exacerbate the difficulty of adjusting the injection valve, resulting in the main circuit electronic expansion valve being unable to reach the ideal opening degree. Among them, the main circuit electronic expansion valve is another key flow adjustment component in the unit, and its opening degree directly affects the evaporation effect of the refrigerant in the evaporator and the refrigeration capacity of the unit.

[0005] It can be seen that the reasonable adjustment of the initial opening degree of the injection valve is crucial for ensuring the stable operation of the unit. Too large or too small an initial opening degree may have an adverse impact on the performance and stability of the unit. Summary of the Invention

[0006] The embodiment of the present application provides a method for adjusting the initial opening degree of an injection valve in a heat pump unit and a heat pump unit, which can adjust the initial opening degree of the injection valve more reasonably and improve the operation stability of the heat pump unit.

[0007] In a first aspect, the embodiment of the present application provides a method for adjusting the initial opening degree of an injection valve in a heat pump unit, including:

[0008] Obtain the ambient temperature of the above heat pump unit;

[0009] Based on the above ambient temperature, determine the initial opening degree range of the injection valve in the above heat pump unit;

[0010] According to the above initial opening degree range, perform an initial opening degree adjustment process on the above injection valve.

[0011] In an implementation manner, the above determining the initial opening degree range of the injection valve in the heat pump unit based on the above ambient temperature includes:

[0012] Obtain the calculation formula for calculating the opening degree upper limit of the above injection valve, and determine the opening degree upper limit of the above injection valve according to the above calculation formula;

[0013] Obtain the set opening degree lower limit for the above injection valve;

[0014] According to the above opening degree upper limit and the above opening degree lower limit, determine the initial opening degree range of the injection valve in the above heat pump unit.

[0015] In an implementation manner, the calculation formula for the opening degree upper limit of the above injection valve is:

[0016] EXVmax = A + B*(T - Tambient) - C*(Ts - Tw_in)

[0017] Wherein, the above A is the opening degree coefficient, the above B is the ambient temperature coefficient, the above C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the opening degree upper limit of the injection valve, Tambient is the ambient temperature of the heat pump unit, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

[0018] In an implementation manner, the above performing an initial opening degree adjustment process on the above injection valve according to the above initial opening degree range includes:

[0019] Obtain the preset opening speed of the injection valve set for the above heat pump unit;

[0020] Set the opening degree lower limit in the above initial opening degree range as the initial opening degree of the above injection valve;

[0021] Perform an initial opening degree adjustment process on the above injection valve according to the above preset opening speed of the injection valve.

[0022] In one embodiment, after the initial opening adjustment process of the injection valve is performed according to the preset injection valve opening speed, the following steps are further included:

[0023] Determine whether the injection valve meets the initial opening adjustment exit condition;

[0024] If the injection valve meets the initial opening adjustment exit condition, the heat pump unit exits the initial opening adjustment process of the injection valve.

[0025] In one embodiment, determining whether the injection valve meets the initial opening adjustment exit condition includes:

[0026] Detect the injection inlet temperature and the injection outlet temperature;

[0027] Detect the current opening of the injection valve;

[0028] Based on the injection inlet temperature, the injection outlet temperature, the ambient temperature, and the current opening, determine whether the injection valve meets the initial opening adjustment exit condition;

[0029] If the difference between the injection outlet temperature and the injection inlet temperature is less than the preset temperature difference, and the current opening reaches the upper limit of the opening in the initial opening range, it is determined that the injection valve meets the initial opening adjustment exit condition.

[0030] In one embodiment, after determining whether the injection valve meets the initial opening adjustment exit condition, the following steps are further included:

[0031] If the injection valve does not meet the initial opening adjustment exit condition, perform the step of performing the initial opening adjustment process of the injection valve according to the preset injection valve opening speed.

[0032] In a second aspect, an embodiment of the present application further provides an adjustment device for the initial opening of an injection valve in a heat pump unit, including:

[0033] An acquisition module for acquiring the ambient temperature of the heat pump unit;

[0034] A determination module for determining the initial opening range of the injection valve in the heat pump unit based on the ambient temperature;

[0035] A control module for performing an initial opening adjustment process on the injection valve according to the initial opening range.

[0036] In one embodiment, the determination module is configured to:

[0037] Obtain and calculate the calculation formula for the upper limit of the opening of the injection valve, and determine the upper limit of the opening of the injection valve according to the calculation formula;

[0038] Obtain the lower limit of the opening degree set for the above-mentioned injection valve;

[0039] Determine the initial opening degree range of the injection valve in the above-mentioned heat pump unit according to the above-mentioned upper limit of the opening degree and the above-mentioned lower limit of the opening degree.

[0040] In one implementation manner, the calculation formula for the upper limit of the opening degree of the above-mentioned injection valve is:

[0041] EXVmax = A + B * (T - Tambient) - C * (Ts - Tw_in)

[0042] Wherein, the above-mentioned A is the opening degree coefficient, the above-mentioned B is the ambient temperature coefficient, the above-mentioned C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the upper limit of the opening degree of the injection valve, Tambient is the ambient temperature where the heat pump unit is located, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

[0043] In one implementation manner, the control module is used for:

[0044] Obtain the preset opening speed of the injection valve set for the above-mentioned heat pump unit;

[0045] Set the lower limit of the opening degree in the above-mentioned initial opening degree range as the initial opening degree of the above-mentioned injection valve;

[0046] Perform initial opening degree adjustment processing on the above-mentioned injection valve according to the above-mentioned preset opening speed of the injection valve.

[0047] In one implementation manner, the control module is further used for:

[0048] Judge whether the above-mentioned injection valve meets the initial opening degree adjustment exit condition;

[0049] If the above-mentioned injection valve meets the above-mentioned initial opening degree adjustment exit condition, the above-mentioned heat pump unit exits the initial opening degree adjustment processing of the above-mentioned injection valve.

[0050] In one implementation manner, the control module is used for:

[0051] Detect the injection inlet temperature and the injection outlet temperature;

[0052] Detect the current opening degree of the above-mentioned injection valve;

[0053] Judge whether the above-mentioned injection valve meets the initial opening degree adjustment exit condition according to the injection inlet temperature, the injection outlet temperature, the ambient temperature and the current opening degree;

[0054] If the difference between the above-mentioned injection outlet temperature and the above-mentioned injection inlet temperature is less than the preset temperature difference, and the above-mentioned current opening degree reaches the upper limit of the opening degree in the above-mentioned initial opening degree range, it is determined that the above-mentioned injection valve meets the above-mentioned initial opening degree adjustment exit condition.

[0055] In one implementation, the control module is further configured to:

[0056] If the above-mentioned injection valve does not meet the above-mentioned initial opening degree adjustment exit condition, then perform the step of adjusting the initial opening degree of the above-mentioned injection valve according to the above-mentioned preset injection valve opening speed.

[0057] In a third aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program runs on a computer, the computer is enabled to execute the method for adjusting the initial opening degree of an injection valve in a heat pump unit provided in any embodiment of the present application.

[0058] In a fourth aspect, an embodiment of the present application further provides a heat pump unit, including a processor and a memory. The memory has a computer program, and the processor is configured to execute the method for adjusting the initial opening degree of an injection valve in a heat pump unit provided in any embodiment of the present application by calling the computer program.

[0059] The technical solution provided by the embodiment of the present application is applied to a heat pump unit. By obtaining the ambient temperature of the heat pump unit, determining the initial opening degree range of the injection valve in the heat pump unit based on the ambient temperature, and performing initial opening degree adjustment processing on the injection valve according to the initial opening degree range. The present application determines the initial opening degree range of the injection valve based on the ambient temperature of the heat pump unit, and performs initial opening degree adjustment processing on the injection valve based on this initial opening degree range, so that the present application can perform more reasonable initial opening degree adjustment on the injection valve and improve the operating stability of the heat pump unit. Description of the Drawings

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0061] Figure 1 A schematic structural diagram of a heat pump unit provided for the method for adjusting the initial opening degree of an injection valve in a heat pump unit provided by an embodiment of the present application.

[0062] Figure 2 The first flow schematic diagram of the method for adjusting the initial opening degree of an injection valve in a heat pump unit provided by an embodiment of the present application.

[0063] Figure 3 This is the second flow schematic diagram of the method for adjusting the initial opening degree of the injection valve in the heat pump unit provided by the embodiment of the present application.

[0064] Figure 4 This is the flow schematic diagram of the method for adjusting the initial opening degree of the injection valve in the heat pump unit provided by the embodiment of the present application under an application scenario.

[0065] Figure 5 This is the structural schematic diagram of the device for adjusting the initial opening degree of the injection valve in the heat pump unit provided by the embodiment of the present application.

[0066] Figure 6 This is the first structural schematic diagram of the heat pump unit provided by the embodiment of the present application.

[0067] Figure 7 This is the second structural schematic diagram of the heat pump unit provided by the embodiment of the present application. Detailed implementation manners

[0068] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0069] Referring to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0070] The injection valve plays a key role in the heat pump unit. It is usually used to adjust the flow rate of the refrigerant or working fluid to ensure the stable operation of the heat pump unit under different working conditions. During the working process of the injection valve, the initial opening degree, as a key parameter, has an important impact on the response speed of the valve, the flow control accuracy, and the overall stability of the system. It directly affects the performance and stability of the unit during startup and the initial stage of operation. Among them, the initial opening degree of the injection valve refers to the initial opening size when the valve starts to open after being in a fully closed state. This opening size determines the initial flow area of the fluid passing through the valve, and thus affects parameters such as the flow rate, pressure, and speed of the fluid.

[0071] When the initial opening degree of the injection valve is set too large, the flow rate of the refrigerant or working fluid will increase rapidly, which will cause the current on the motor or related components driving the injection valve to increase rapidly. If the current exceeds the preset protection threshold, the unit may trigger the current protection mechanism, resulting in shutdown or alarm. This may reduce the operating frequency of the compressor, and the reduction of the compressor operating frequency will directly lead to the decline of the overall performance of the unit, making it unable to meet the expected refrigeration or heating demand, and then affecting the refrigeration or heating capacity of the entire unit.

[0072] When the initial opening degree of the injection valve is set too small, the flow rate of the refrigerant or working fluid will be restricted. The too low flow rate causes the refrigerant in the injection path to overheat during heat exchange and continuously eject gas, increasing the useless work of the compressor. Moreover, the too small initial opening degree may also cause the injection valve to respond slowly during the adjustment process. When the operating conditions of the unit change, the injection valve may not be able to adjust to the optimal opening degree in time, thus affecting the stability and performance of the unit. In addition, the adjustment of the injection valve may also be affected by other factors such as the operating frequency of the compressor and the ambient temperature. If the initial opening degree is too small, these external factors may further exacerbate the difficulty of adjusting the injection valve, resulting in the main electronic expansion valve not being able to reach the ideal opening degree. Among them, the main electronic expansion valve is another key flow adjustment component in the unit, and its opening degree directly affects the evaporation effect of the refrigerant in the evaporator and the refrigeration capacity of the unit.

[0073] It can be seen that the reasonable adjustment of the initial opening degree of the injection valve is crucial for ensuring the stable operation of the unit. Too large or too small initial opening degree may have an adverse impact on the performance and stability of the unit.

[0074] To solve the above existing technical problems, the embodiment of the present application provides a method for adjusting the initial opening degree of an injection valve in a heat pump unit. The execution subject of the method for adjusting the initial opening degree of the injection valve in the heat pump unit can be the device for adjusting the initial opening degree of the injection valve in the heat pump unit provided by the embodiment of the present application, or a heat pump unit integrated with the device for adjusting the initial opening degree of the injection valve in the heat pump unit, where the device for adjusting the initial opening degree of the injection valve in the heat pump unit can be implemented in a hardware or software manner.

[0075] Please refer to Figure 1 , Figure 1 FIG. is a schematic structural diagram of a heat pump unit provided for the method for adjusting the initial opening degree of an injection valve in a heat pump unit provided by an embodiment of the present application. Among them, EXV refers to the electronic expansion valve (Electronic Expansion Valve), that is, the injection valve. Cooling represents refrigeration, and heating represents heating. Figure 1The small black squares represent sensors such as temperature sensors, pressure sensors, etc. For example, different temperature data can be detected according to the different positions of the temperature sensors, such as water temperature, ambient temperature, refrigerant temperature, etc. Another example is that different pressure data can be detected according to the different positions of the pressure sensors, such as condensing pressure, evaporating pressure, etc.

[0076] Next, please refer to Figure 2 , Figure 2 , which is the first schematic flow chart of the method for adjusting the initial opening of the injection valve in the heat pump unit provided by the embodiment of the present application. The method for adjusting the initial opening of the injection valve in the heat pump unit provided by the embodiment of the present application is applied to the heat pump unit. The specific process of this method can be as follows:

[0077] S110. Obtain the ambient temperature of the heat pump unit.

[0078] In one example, please refer to Figure 1 , a temperature sensor can be set at the position marked by Tambint in Figure 1 to obtain the ambient temperature of the heat pump unit.

[0079] It should be noted that the method for adjusting the initial opening of the injection valve in the heat pump unit provided by the embodiment of the present application needs to trigger the adjustment process of the initial opening of the injection valve when the ambient temperature of the heat pump unit is greater than the preset ambient temperature threshold. Among them, the preset ambient temperature threshold is obtained by those skilled in the art through debugging in the actual working scenario of the heat pump unit.

[0080] S120. Determine the initial opening range of the injection valve in the heat pump unit based on the ambient temperature.

[0081] In the embodiment of the present application, the initial opening range of the injection valve in the heat pump unit is determined based on the ambient temperature of the heat pump unit.

[0082] Specifically, a calculation formula for calculating the opening of the injection valve is provided in the present application. The calculation formula for calculating the upper limit of the opening of the injection valve is as follows:

[0083] EXVmax = A + B*(T - Tambient) - C*(Ts - Tw_in)

[0084] Where A is the opening coefficient, B is the ambient temperature coefficient, C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the upper limit of the opening of the injection valve, Tambient is the ambient temperature of the heat pump unit, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

[0085] Among them, the recommended ambient temperature T refers to the state where the performance (such as heating efficiency, energy consumption, etc.) of the heat pump unit reaches the optimal or relatively suitable state when the heat pump unit operates at a certain specific ambient temperature. The recommended ambient temperature T is obtained through experiments or simulations and is used to guide the design, installation, and operation of the heat pump unit. Specifically, it is debugged by those skilled in the art in the actual working scenario of the heat pump unit.

[0086] Among them, the set water temperature of the heat pump refers to the set outlet water temperature of the heat pump, and this set water temperature of the heat pump can be set by the user on the on-site controller.

[0087] Among them, the opening coefficient A, the ambient temperature coefficient B, and the water temperature coefficient C are function coefficients obtained by performing function fitting on data of different groups of ambient temperature, set water temperature of the heat pump, inlet water temperature of the heat pump, and injection valve opening collected when the heat pump unit is operating.

[0088] In one example, please refer to Figure 1 , it is possible to Figure 1 set a temperature sensor at the position marked by Tw_in to detect the inlet water temperature of the heat pump, detect the ambient temperature of the heat pump unit based on the temperature sensor set at the position marked by Tambint, and obtain the set water temperature of the heat pump. Then, substitute the obtained inlet water temperature of the heat pump, ambient temperature, and set water temperature of the heat pump into the above formula for calculating the upper limit of the injection valve opening to calculate the upper limit of the opening of this injection valve. Then, obtain the lower limit of the opening of this injection valve. It should be noted that this lower limit of the opening is determined based on the performance of this injection valve itself and the working requirements of the heat pump unit. That is, the lower limit of the opening of this injection valve is debugged by those skilled in the art in the actual working scenario of the heat pump unit, and the lower limit of the opening of this injection valve is set to a fixed parameter value. After obtaining the lower limit and upper limit of the opening of this injection valve, the initial opening range of this injection valve can be determined. It can be understood that the lower limit in this initial opening range is this lower limit of the opening, and the upper limit in this initial opening range is this upper limit of the opening.

[0089] S130. Perform initial opening adjustment processing on the injection valve according to the initial opening range.

[0090] In this application, after determining the initial opening range of the injection valve in the heat pump unit, the initial opening of this injection valve can be adjusted according to this initial opening range.

[0091] In one example, the lower limit of the opening degree of the injection valve can be used as the initial opening degree of the injection valve, and it operates based on the preset opening speed of the injection valve set for the heat pump unit until the difference between the injection outlet temperature and the injection inlet temperature of the injection valve is less than the preset temperature difference, and the current opening degree of the injection valve reaches the upper limit of the opening degree within the initial opening degree range, then it is determined that the injection valve meets the exit condition for the initial opening degree adjustment, and at this time, the processing of the initial opening degree adjustment of the injection valve is exited.

[0092] Among them, the exit condition for the initial opening degree adjustment provided in this embodiment can be expressed by the following inequality:

[0093] Tjet_out - Tjet_in < min(t1 - Tambient, t1)

[0094] Tjet_out - Tjet_in < t2

[0095] Among them, Tjet_in is the injection inlet temperature, Tjet_out is the injection outlet temperature, t1 is the first reference coefficient for the injection inlet and outlet temperature difference, and t2 is the second reference coefficient for the injection inlet and outlet temperature difference. Both t1 and t2 are obtained by debugging by those skilled in the art in the actual working scenario of the heat pump unit.

[0096] Furthermore, in this embodiment, when determining whether the injection valve meets the exit condition for the initial opening degree adjustment, the injection inlet temperature and the injection outlet temperature are detected, the current opening degree of the injection valve is detected, and based on the injection inlet temperature, the injection outlet temperature, the ambient temperature, and the current opening degree, it is determined whether the injection valve meets the exit condition for the initial opening degree adjustment. If the difference between the injection outlet temperature and the injection inlet temperature is less than the preset temperature difference, and the current opening degree reaches the upper limit of the opening degree within the initial opening degree range, then it is determined that the injection valve meets the exit condition for the initial opening degree adjustment.

[0097] Specifically, please refer to Figure 1 , the injection inlet, that is, the position marked by Tjet_out, and the injection outlet, that is, the position marked by Tjet_in. Temperature sensors can be respectively set at these two positions in the heat pump unit to detect the injection inlet temperature and the injection outlet temperature, and the ambient temperature of the heat pump unit is detected based on the temperature sensor set at the position marked by Tambint.

[0098] In one implementation manner, when detecting the current opening degree of the injection valve, a position sensor or an angle sensor can be installed on the injection valve to monitor the change in the opening degree of the valve in real time, so as to obtain the current opening degree of the injection valve. Or in one implementation manner, since the injection valve can be controlled by an electronic signal, the control history of the injection valve can be recorded, and thus the current opening degree of the injection valve is determined based on the record of the control history.

[0099] Among them, the preset opening speed of the injection valve refers to a speed value preset for the opening action of the injection valve in the heat pump unit system. This speed value is determined by those skilled in the art according to the specific functions to be achieved by the heat pump unit and after a series of debugging and testing. Generally, the preset opening speed of a certain model of heat pump unit is fixed. Specifically, the opening speed of the injection valve is generally expressed as X steps / Y seconds, which means walking X steps every Y seconds. For example, when X = 20 and Y = 10, it means walking 20 steps every 10 seconds. Among them, step refers to the smallest unit of change in the opening of the injection valve.

[0100] In one embodiment, after taking the lower limit of the opening of the injection valve as the initial opening of the injection valve, the injection valve can be maintained at the initial opening for a preset duration, and then after the preset duration, it works based on the preset opening speed of the injection valve set for the heat pump unit. Among them, the preset duration is the reaction time reserved for the corresponding heat pump system of the heat pump unit. The main purpose of setting the preset duration is to allow the system to have enough time to adapt to the new opening of the injection valve and reach a relatively stable state. By reserving such a reaction time, a relatively stable operating state of the heat pump system can be ensured. The preset duration is obtained by those skilled in the art through debugging in the actual working scenario of the heat pump unit.

[0101] In specific implementation, the present application is not limited by the execution order of the described steps. Without conflict, some steps can also be performed in other orders or simultaneously.

[0102] As can be seen from the above, the method for adjusting the initial opening of the injection valve in the heat pump unit provided by the embodiments of the present application is applied to the heat pump unit. By obtaining the ambient temperature of the heat pump unit, the initial opening range of the injection valve in the heat pump unit is determined based on the ambient temperature, and the initial opening of the injection valve is adjusted according to the initial opening range. The present application determines the initial opening range of the injection valve based on the ambient temperature of the heat pump unit and adjusts the initial opening of the injection valve based on the initial opening range, so that the present application can perform more reasonable adjustment of the initial opening of the injection valve and improve the stability of the operation of the heat pump unit.

[0103] According to the method described in the previous embodiments, the following will be further described in detail with examples.

[0104] Please refer to Figure 3 , Figure 3 which is the second flow diagram of the method for adjusting the initial opening of the injection valve in the heat pump unit provided by the embodiments of the present application. The method for adjusting the initial opening of the injection valve in the heat pump unit provided by the embodiments of the present application is applied to the heat pump unit. The method includes:

[0105] S210. Obtain the ambient temperature of the heat pump unit.

[0106] In one example, please refer to Figure 1 and a temperature sensor can be set at the position of the Tambint mark in Figure 1 to obtain the ambient temperature where the heat pump unit is located.

[0107] It should be noted that for the method for adjusting the initial opening degree of the injection valve in the heat pump unit provided in the embodiments of the present application, the initial opening degree adjustment process of the injection valve can be triggered only when the ambient temperature where the heat pump unit is located is greater than a preset ambient temperature threshold. Among them, the preset ambient temperature threshold is obtained by those skilled in the art through debugging in the actual working scenario of the heat pump unit.

[0108] S220. Determine the initial opening degree range of the injection valve in the heat pump unit based on the ambient temperature.

[0109] In the embodiments of the present application, the initial opening degree range of the injection valve in the heat pump unit is determined based on the ambient temperature where the heat pump unit is located.

[0110] In one implementation manner, step S220, "Determine the initial opening degree range of the injection valve in the heat pump unit based on the ambient temperature", may include the following steps:

[0111] S2201. Obtain the calculation formula for calculating the upper limit of the opening degree of the injection valve, and determine the upper limit of the opening degree of the injection valve according to the calculation formula;

[0112] Among them, the calculation formula for the upper limit of the opening degree of the injection valve provided in the present application is:

[0113] EXVmax = A + B*(T - Tambient) - C*(Ts - Tw_in)

[0114] Among them, A is the opening degree coefficient, B is the ambient temperature coefficient, C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the upper limit of the opening degree of the injection valve, Tambient is the ambient temperature where the heat pump unit is located, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

[0115] Among them, the recommended ambient temperature T refers to the state where the performance (such as heating efficiency, energy consumption, etc.) of the heat pump unit reaches the optimal or more suitable state when the heat pump unit works at a certain specific ambient temperature. The recommended ambient temperature T is obtained through experiments or simulations and is used to guide the design, installation, and operation of the heat pump unit, and is specifically obtained by those skilled in the art through debugging in the actual working scenario of the heat pump unit.

[0116] Among them, the set water temperature of the heat pump refers to the set outlet water temperature of the heat pump, and the set water temperature of the heat pump can be set by the user on the on-line controller.

[0117] Among them, the opening coefficient A, the ambient temperature coefficient B, and the water temperature coefficient C are function coefficients obtained by performing function fitting based on data of different groups of ambient temperatures, heat pump set water temperatures, heat pump inlet water temperatures, and injection valve openings collected when the heat pump unit is working.

[0118] In an example, see Figure 1 ,Can Figure 1 A temperature sensor is set at the Tw_in mark to detect the heat pump water inlet temperature. The temperature sensor set at the Tambint mark detects the ambient temperature of the heat pump unit and obtains the heat pump set water temperature. The heat pump water inlet temperature, ambient temperature and heat pump set water temperature obtained above are substituted into the calculation formula of the upper limit of the injection valve opening to calculate the upper limit of the injection valve opening.

[0119] S2202, obtaining the lower limit of the opening degree set for the injection valve;

[0120] It should be noted that in the present application, the lower limit of the opening of the injection valve is determined based on the performance of the injection valve itself and the working requirements of the heat pump unit. That is, the lower limit of the opening of the injection valve is obtained by debugging by those skilled in the art in the actual working scenario of the heat pump unit, and the lower limit of the opening of the injection valve is set as a fixed parameter value.

[0121] S2203. Determine the initial opening range of the injection valve in the heat pump unit according to the upper opening limit and the lower opening limit.

[0122] It is understood that after obtaining the opening lower limit and opening lower limit of the injection valve, the initial opening range of the injection valve can be determined. It is understood that the lower limit in the initial opening range is the opening lower limit, and the upper limit in the initial opening range is the opening upper limit.

[0123] S230, obtaining a preset injection valve opening speed set for the heat pump unit.

[0124] Among them, the preset injection valve opening speed refers to a speed value pre-set for the injection valve opening action in the heat pump unit system. The speed value is determined by technical personnel in this field according to the specific functions that the heat pump unit needs to realize, and after a series of debugging and testing. Generally, the preset injection valve opening speed of a certain model of heat pump unit is fixed. Specifically, the injection valve opening speed is generally expressed as X steps / Y seconds, which means X steps every Y seconds. For example, when X=20 and Y=10, it means 20 steps every 10 seconds. Among them, step refers to the smallest unit of change in the injection valve opening.

[0125] Therefore, in the embodiment of the present application, the preset injection valve opening speed set by the heat pump unit can be directly obtained.

[0126] S240. Set the lower limit of the opening degree in the initial opening degree range as the initial opening degree of the injection valve.

[0127] In the embodiment of the present application, after determining the initial opening degree range of the injection valve, set the lower limit of the opening degree in the initial opening degree range as the initial opening degree of the injection valve.

[0128] In one implementation, after taking the lower limit of the opening degree of the injection valve as the initial opening degree of the injection valve, the injection valve can be maintained at the initial opening degree for a preset duration, and then after the preset duration, operate based on the preset opening speed of the injection valve set for the heat pump unit. Wherein, the preset duration is the reaction time reserved for the heat pump system corresponding to the heat pump unit. The main purpose of setting the preset duration is to allow the system to have enough time to adapt to the new opening degree of the injection valve and reach a relatively stable state. By reserving such a reaction time, a relatively stable operating state of the heat pump system can be ensured. The preset duration is obtained by a person skilled in the art through debugging in the actual working scenario of the heat pump unit.

[0129] S250. Perform an initial opening degree adjustment process on the injection valve according to the preset opening speed of the injection valve.

[0130] In the embodiment of the present application, set the lower limit of the opening degree in the initial opening degree range as the initial opening degree of the injection valve, and perform an initial opening degree adjustment process on the injection valve according to the preset opening speed of the injection valve.

[0131] S260. Determine whether the injection valve meets the initial opening degree adjustment exit condition; if the injection valve meets the initial opening degree adjustment exit condition, execute step S270; if the injection valve does not meet the initial opening degree adjustment exit condition, execute step S250.

[0132] In one implementation, when determining whether the injection valve meets the initial opening degree adjustment exit condition, detect the injection inlet temperature and the injection outlet temperature, detect the current opening degree of the injection valve, and determine whether the injection valve meets the initial opening degree adjustment exit condition according to the injection inlet temperature, the injection outlet temperature, the ambient temperature, and the current opening degree. If the difference between the injection outlet temperature and the injection inlet temperature is less than the preset temperature difference, and the current opening degree reaches the upper limit of the opening degree in the initial opening degree range, it is determined that the injection valve meets the initial opening degree adjustment exit condition.

[0133] Among them, the initial opening degree adjustment exit condition provided in this embodiment can be represented by the following inequality:

[0134] Tjet_out - Tjet_in < min(t1 - Tambient, t1)

[0135] Tjet_out - Tjet_in < t2

[0136] Among them, Tjet_in is the injection inlet temperature, Tjet_out is the injection outlet temperature, t1 is the reference coefficient of the first injection inlet and outlet temperature difference, and t2 is the reference coefficient of the second injection inlet and outlet temperature difference. Both t1 and t2 are obtained by debugging by those skilled in the art in the actual working scenario of this heat pump unit.

[0137] It can be understood that the preset temperature difference value is the smaller value of min(t1 - Tambient, t1) and t2.

[0138] Specifically, please refer to Figure 1 , the injection inlet, that is, the position marked by Tjet_out, and the injection outlet, that is, the position marked by Tjet_in. Temperature sensors can be set at these two positions in the heat pump unit respectively to detect the injection inlet temperature and the injection outlet temperature, and the ambient temperature of the heat pump unit is detected based on the temperature sensor set at the position marked by Tambint.

[0139] In one implementation manner, when detecting the current opening degree of the injection valve, a position sensor or an angle sensor can be installed on the injection valve to monitor the change of the valve opening degree in real time, so as to obtain the current opening degree of the injection valve. Or in one implementation manner, since the injection valve can be controlled by an electronic signal, the control history of the injection valve can be recorded, and thus the current opening degree of the injection valve can be determined based on the record of the control history.

[0140] In this embodiment, when the injection valve does not meet the initial opening degree adjustment exit condition, step S250 is executed, that is, the initial opening degree adjustment process of the injection valve is continued.

[0141] S270. The heat pump unit exits the initial opening degree adjustment process of the injection valve.

[0142] It can be understood that if the injection valve meets the initial opening degree adjustment exit condition, the heat pump unit exits the initial opening degree adjustment process of the injection valve.

[0143] To intuitively understand the method for adjusting the initial opening degree of the injection valve in the heat pump unit provided in this application, please refer to Figure 4 , Figure 4 is a schematic flow chart of an application scenario of the method for adjusting the initial opening degree of the injection valve in the heat pump unit provided in the embodiment of this application. Among them, it is assumed that the initial opening degree range corresponding to the injection valve of this heat pump unit is 40 steps ≤ EXV ≤ 220 steps, the preset duration is 2 minutes, the preset ambient temperature threshold is -10 degrees Celsius, the preset injection valve opening speed is 10 steps / 30 seconds, the ambient temperature is 25 degrees Celsius, t1 is 25 degrees Celsius, and t2 is 10 degrees Celsius.

[0144] When the ambient temperature where the heat pump unit is located is greater than -10 °C, determine that the initial opening range of the injection valve is 40 steps ≤ EXV ≤ 220 steps. Set the initial opening of the injection valve to the lower limit of the initial opening range, which is 40 steps, and maintain it for 2 minutes. Then, operate at a preset injection valve opening speed of 10 steps / 30 seconds, and detect whether ① Tjet_out - Tjet_in < min(20, 25), ② Tjet_out - Tjet_in < 10, and ③ the current opening EXV of the injection valve reaches the upper limit of the initial opening range, which is 220, are all satisfied. If satisfied, exit the processing of adjusting the initial opening of the injection valve. If not satisfied, continue to perform the processing of adjusting the initial opening of the injection valve.

[0145] As can be seen from the above, the method for adjusting the initial opening of the injection valve in the heat pump unit proposed in the embodiment of the present application is applied to the heat pump unit. The ambient temperature where the heat pump unit is located is obtained, the initial opening range of the injection valve in the heat pump unit is determined based on the ambient temperature, the preset injection valve opening speed set in the heat pump unit is obtained, the lower limit of the opening in the initial opening range is set as the initial opening of the injection valve, and the initial opening of the injection valve is adjusted according to the preset injection valve opening speed. It is judged whether the injection valve meets the initial opening adjustment exit condition. If the injection valve meets the initial opening adjustment exit condition, the heat pump unit exits the processing of adjusting the initial opening of the injection valve. If the injection valve does not meet the initial opening adjustment exit condition, continue to adjust the initial opening of the injection valve according to the preset injection valve opening speed. Based on the ambient temperature of the heat pump unit, the initial opening range of the injection valve is determined according to the ambient temperature, and the initial opening of the injection valve is adjusted based on this initial opening range, so that the present application can perform more reasonable initial opening adjustment of the injection valve and improve the operating stability of the heat pump unit.

[0146] In an embodiment, a device for adjusting the initial opening of the injection valve in a heat pump unit is further provided. Please refer to Figure 5 , Figure 5 is a schematic structural diagram of the device 300 for adjusting the initial opening of the injection valve in the heat pump unit provided in the embodiment of the present application. The device 300 for adjusting the initial opening of the injection valve in the heat pump unit is applied to the heat pump unit. The device 300 for adjusting the initial opening of the injection valve in the heat pump unit includes an acquisition module 301, a determination module 302, and a control module 303, as follows:

[0147] The acquisition module 301 is configured to acquire the ambient temperature where the above-mentioned heat pump unit is located;

[0148] The determination module 302 is configured to determine the initial opening range of the injection valve in the above-mentioned heat pump unit based on the above-mentioned ambient temperature;

[0149] The control module 303 is configured to perform the initial opening adjustment process on the above-mentioned injection valve according to the above-mentioned initial opening range.

[0150] In one embodiment, a determination module 302 is configured to:

[0151] Obtain a calculation formula for calculating the upper limit of the opening degree of the injection valve, and determine the upper limit of the opening degree of the injection valve according to the calculation formula;

[0152] Obtain the lower limit of the opening degree set for the injection valve;

[0153] Determine the initial opening degree range of the injection valve in the heat pump unit according to the upper limit of the opening degree and the lower limit of the opening degree.

[0154] In one embodiment, the calculation formula for the upper limit of the opening degree of the injection valve is:

[0155] EXVmax = A + B*(T - Tambient) - C*(Ts - Tw_in)

[0156] Wherein, A is the opening degree coefficient, B is the ambient temperature coefficient, C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the upper limit of the opening degree of the injection valve, Tambient is the ambient temperature where the heat pump unit is located, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

[0157] In one embodiment, a control module 303 is configured to:

[0158] Obtain the preset opening speed of the injection valve set for the heat pump unit;

[0159] Set the lower limit of the opening degree in the initial opening degree range as the initial opening degree of the injection valve;

[0160] Perform an initial opening degree adjustment process on the injection valve according to the preset opening speed of the injection valve.

[0161] In one embodiment, the control module 303 is further configured to:

[0162] Determine whether the injection valve meets the initial opening degree adjustment exit condition;

[0163] If the injection valve meets the initial opening degree adjustment exit condition, the heat pump unit exits the initial opening degree adjustment process for the injection valve.

[0164] In one embodiment, the control module 303 is configured to:

[0165] Detect the injection inlet temperature and the injection outlet temperature;

[0166] Detect the current opening degree of the injection valve;

[0167] Judge whether the above injection valve meets the initial opening degree adjustment exit condition according to the injection inlet temperature, injection outlet temperature, ambient temperature, and current opening degree;

[0168] If the difference between the above injection outlet temperature and the above injection inlet temperature is less than the preset temperature difference, and the above current opening degree reaches the upper limit of the opening degree in the above initial opening degree range, it is determined that the above injection valve meets the above initial opening degree adjustment exit condition.

[0169] In one implementation manner, the control module 303 is further configured to:

[0170] If the above injection valve does not meet the above initial opening degree adjustment exit condition, perform the step of adjusting the initial opening degree of the above injection valve according to the above preset injection valve opening speed.

[0171] It should be noted that the device for adjusting the initial opening degree of the injection valve in the heat pump unit provided in the embodiment of the present application and the method for adjusting the initial opening degree of the injection valve in the heat pump unit in the above embodiment belong to the same concept. Through the device for adjusting the initial opening degree of the injection valve in the heat pump unit, any method provided in the embodiment of the method for adjusting the initial opening degree of the injection valve in the heat pump unit can be realized. The specific implementation process is detailed in the embodiment of the method for adjusting the initial opening degree of the injection valve in the heat pump unit, and will not be elaborated here.

[0172] In addition, in order to better implement the method for adjusting the initial opening degree of the injection valve in the heat pump unit in the embodiment of the present application, based on the method for adjusting the initial opening degree of the injection valve in the heat pump unit, the present application also provides a heat pump unit. Please refer to Figure 6 , Figure 6 which is the first structural schematic diagram of the heat pump unit provided in the embodiment of the present application. The heat pump unit 400 includes a processor 401 and a memory 402. Among them, the processor 401 is electrically connected to the memory 402.

[0173] The processor 401 is the control center of the heat pump unit 400. It connects all parts of the entire heat pump unit through various interfaces and circuits. By running or invoking the computer programs stored in the memory 402 and invoking the data stored in the memory 402, it executes various functions of the heat pump unit and processes data, thereby performing overall monitoring of the heat pump unit. Among them, the processor 401 can be a Central Processing Unit (CPU), or it can also be other general-purpose processors, Digital Signal Processors (DSPs), Application-Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0174] The memory 402 can be used to store computer programs and data. The computer programs stored in the memory 402 contain instructions that can be executed in the processor. The computer programs can form various functional modules. The processor 401 executes various functional applications and data processing by invoking the computer programs stored in the memory 402. Among them, the memory 402 mainly includes a program storage area and a data storage area. The program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the heat pump unit 400 (such as audio data, video data, etc.). In addition, the memory can include high-speed random access memory and can also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

[0175] In this embodiment, the processor 401 in the heat pump unit 400 will load the instructions corresponding to the processes of one or more computer programs into the memory 402 according to the following steps, and the processor 401 will run the computer programs stored in the memory 402 to implement various functions:

[0176] Obtain the ambient temperature of the heat pump unit described above;

[0177] Based on the ambient temperature described above, determine the initial opening range of the injection valve in the heat pump unit described above;

[0178] Perform initial opening adjustment processing on the injection valve according to the above initial opening range.

[0179] In one embodiment, please refer to Figure 7 , Figure 7 FIG. 9 is a second schematic structural diagram of a heat pump unit provided by an embodiment of the present application. The heat pump unit 400 further includes: a radio frequency circuit 403, a display screen 404, a control circuit 405, an input unit 406, an audio circuit 407, a sensor 408, and a power supply 409. Among them, the processor 401 is electrically connected to the radio frequency circuit 403, the display screen 404, the control circuit 405, the input unit 406, the audio circuit 407, the sensor 408, and the power supply 409 respectively.

[0180] The radio frequency circuit 403 is used to receive and transmit radio frequency signals to communicate with network devices or other heat pump units through wireless communication.

[0181] The display screen 404 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the heat pump unit. These graphical user interfaces can be composed of images, texts, icons, videos, and any combination thereof.

[0182] The control circuit 405 is electrically connected to the display screen 404 and is used to control the display screen 404 to display information.

[0183] The input unit 406 can be used to receive input digital, character information, or user characteristic information (such as fingerprints), and generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function controls. Among them, the input unit 406 can include a fingerprint recognition module.

[0184] The audio circuit 407 can provide an audio interface between the user and the heat pump unit through a speaker and a microphone. Among them, the audio circuit 407 includes a microphone. The microphone is electrically connected to the processor 401. The microphone is used to receive voice information input by the user.

[0185] The sensor 408 is used to collect external environmental information. The sensor 408 can include one or more of sensors such as an ambient light sensor, an acceleration sensor, and a gyroscope.

[0186] The power supply 409 is used to supply power to each component of the heat pump unit 400. In one embodiment, the power supply 409 can be logically connected to the processor 401 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system.

[0187] Although not shown in the figure, the heat pump unit 400 may further include a camera, a Bluetooth module, etc., which will not be elaborated here.

[0188] In this embodiment, the processor 401 in the heat pump unit 400 will load the instructions corresponding to the processes of one or more computer programs into the memory 402 according to the following steps, and the processor 401 will run the computer programs stored in the memory 402 to implement various functions:

[0189] Obtain the ambient temperature of the heat pump unit;

[0190] Based on the ambient temperature, determine the initial opening range of the injection valve in the heat pump unit;

[0191] Perform an initial opening adjustment process on the injection valve according to the initial opening range.

[0192] In one implementation, when the processor 401 executes the step of determining the initial opening range of the injection valve in the heat pump unit based on the ambient temperature, it can execute:

[0193] Obtain the calculation formula for the upper opening limit of the injection valve, and determine the upper opening limit of the injection valve according to the calculation formula;

[0194] Obtain the lower opening limit set for the injection valve;

[0195] Determine the initial opening range of the injection valve in the heat pump unit according to the upper opening limit and the lower opening limit.

[0196] In one implementation, the calculation formula for the upper opening limit of the injection valve is:

[0197] EXVmax = A + B * (T - Tambient) - C * (Ts - Tw_in)

[0198] Where, A is the opening coefficient, B is the ambient temperature coefficient, C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the upper opening limit of the injection valve, Tambient is the ambient temperature of the heat pump unit, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

[0199] In one implementation, when the processor 401 executes the step of performing an initial opening adjustment process on the injection valve according to the initial opening range, it can execute:

[0200] Obtain the preset opening speed of the injection valve set for the heat pump unit;

[0201] Set the lower opening limit in the initial opening range as the initial opening of the injection valve;

[0202] Adjust the initial opening degree of the above-mentioned injection valve according to the preset injection valve opening speed.

[0203] In one embodiment, after the processor 401 performs the process of adjusting the initial opening degree of the above-mentioned injection valve according to the preset injection valve opening speed, it may further execute:

[0204] Determine whether the above-mentioned injection valve meets the initial opening degree adjustment exit condition;

[0205] If the above-mentioned injection valve meets the above-mentioned initial opening degree adjustment exit condition, the above-mentioned heat pump unit exits the process of adjusting the initial opening degree of the above-mentioned injection valve.

[0206] In one embodiment, when the processor 401 determines whether the above-mentioned injection valve meets the initial opening degree adjustment exit condition, it may execute:

[0207] Detect the injection inlet temperature and the injection outlet temperature;

[0208] Detect the current opening degree of the above-mentioned injection valve;

[0209] According to the injection inlet temperature, the injection outlet temperature, the ambient temperature, and the current opening degree, determine whether the above-mentioned injection valve meets the initial opening degree adjustment exit condition;

[0210] If the difference between the above-mentioned injection outlet temperature and the above-mentioned injection inlet temperature is less than the preset temperature difference, and the above-mentioned current opening degree reaches the opening upper limit in the above-mentioned initial opening degree range, it is determined that the above-mentioned injection valve meets the above-mentioned initial opening degree adjustment exit condition.

[0211] In one embodiment, after the processor 401 determines whether the above-mentioned injection valve meets the initial opening degree adjustment exit condition, it may further execute:

[0212] If the above-mentioned injection valve does not meet the above-mentioned initial opening degree adjustment exit condition, execute the step of adjusting the initial opening degree of the above-mentioned injection valve according to the preset injection valve opening speed.

[0213] The embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program runs on a computer, the computer executes the method for adjusting the initial opening degree of the injection valve in the heat pump unit in any of the above embodiments.

[0214] It should be noted that those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the storage medium can include, but is not limited to: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical discs, etc.

[0215] In addition, the terms "first", "second", "third", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but some embodiments also include steps or modules that are not listed, or some embodiments also include other steps or modules inherent to these processes, methods, products, or devices.

[0216] The method for adjusting the initial opening degree of the injection valve in the heat pump unit and the heat pump unit provided by the embodiments of the present application have been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A method for adjusting the initial opening of an injection valve in a heat pump unit, applied to a heat pump unit, characterized in that: include: Obtaining the ambient temperature of the heat pump unit; determining an initial opening range of an injection valve in the heat pump unit based on the ambient temperature; An initial opening adjustment process is performed on the injection valve according to the initial opening range.

2. The method according to claim 1, characterized in that The determining of the initial opening range of the injection valve in the heat pump unit based on the ambient temperature includes: Obtaining a calculation formula for calculating the upper limit of the opening degree of the injection valve, and determining the upper limit of the opening degree of the injection valve according to the calculation formula; Acquire a lower limit of the opening degree set for the injection valve; The initial opening range of the injection valve in the heat pump unit is determined according to the opening upper limit and the opening lower limit.

3. The method according to claim 2, characterized in that The calculation formula for the upper limit of the opening of the injection valve is: EXVmax=A+B*(T-Tambient)-C*(Ts-Tw_in) Among them, A is the opening coefficient, B is the ambient temperature coefficient, C is the water temperature coefficient, T is the recommended ambient temperature, EXVmax is the upper limit of the opening of the injection valve, Tambient is the ambient temperature of the heat pump unit, Ts is the set water temperature of the heat pump, and Tw_in is the inlet water temperature of the heat pump.

4. The method according to claim 1, characterized in that: The initial opening adjustment process of the injection valve according to the initial opening range includes: Obtaining a preset injection valve opening speed set for the heat pump unit; Setting the lower limit of the opening degree in the initial opening degree range as the initial opening degree of the injection valve; The initial opening adjustment process of the injection valve is performed according to the preset injection valve opening speed.

5. The method according to claim 4, characterized in that After the initial opening adjustment process of the injection valve is performed according to the preset injection valve opening speed, the method further includes: Determining whether the injection valve meets the initial opening adjustment exit condition; If the injection valve meets the initial opening adjustment exit condition, the heat pump unit exits the initial opening adjustment process for the injection valve.

6. The method according to claim 5, characterized in that The determining whether the injection valve meets the initial opening adjustment exit condition includes: Detecting the injection inlet temperature and the injection outlet temperature; detecting a current opening of the injection valve; According to the injection inlet temperature, the injection outlet temperature, the ambient temperature and the current opening, judging whether the injection valve meets the initial opening adjustment exit condition; If the difference between the injection outlet temperature and the injection inlet temperature is less than a preset temperature difference, and the current opening reaches the upper opening limit in the initial opening range, it is determined that the injection valve meets the initial opening adjustment exit condition.

7. The method according to claim 5, characterized in that After determining whether the injection valve meets the initial opening adjustment exit condition, the method further includes: If the injection valve does not meet the initial opening adjustment exit condition, a step of performing initial opening adjustment processing on the injection valve according to the preset injection valve opening speed is executed.

8. A device for adjusting the initial opening of an injection valve in a heat pump unit, characterized in that: include: An acquisition module, used to acquire the ambient temperature of the heat pump unit; A determination module, configured to determine an initial opening range of an injection valve in the heat pump unit based on the ambient temperature; A control module is used to perform initial opening adjustment processing on the injection valve according to the initial opening range.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed on a computer, the computer is enabled to execute the method for adjusting the initial opening of an injection valve in a heat pump unit according to any one of claims 1 to 7.

10. A heat pump unit, comprising a processor and a memory, wherein the memory stores a computer program, characterized in that: The processor is used to execute the method for adjusting the initial opening of the injection valve in the heat pump unit according to any one of claims 1 to 7 by calling the computer program.

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