Supercooling degree control method and device, storage medium and refrigeration equipment

Abstract

The embodiment of the invention provides a supercooling degree control method and device, a storage medium and refrigeration equipment, under the condition that the supercooling degree of an inlet of a fluorine pump is smaller than a first preset supercooling degree, a flow regulating valve arranged on a bypass pipeline is opened to a preset opening degree, and the bypass pipeline is used for connecting an outlet and the inlet of the fluorine pump; after the flow regulating valve is opened at the preset opening degree for the preset duration, whether the supercooling degree of a fluorine pump mixing inlet located between the fluorine pump and the inlet is larger than or equal to the first preset supercooling degree or not is judged; if not, the target bypass flow of the refrigerant is determined, the target opening degree of the flow adjusting valve corresponding to the target bypass flow is determined according to a preset mapping relation, and the preset mapping relation comprises multiple bypass flows and the opening degree of the flow adjusting valve corresponding to the bypass flows; and the flow adjusting valve is opened to the target opening degree, the flow adjusting valve opening degree corresponding to the bypass flow needing to be adjusted is obtained through the preset mapping relation, the supercooling degree adjusting time is saved, and the running reliability of the fluorine pump is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of supercooling control, and in particular to a supercooling control method, device, storage medium and refrigeration equipment. Background Art

[0002] Data centers are equipped with a variety of data processing equipment. With the extensive application of 4G and the gradual popularization of 5G, the heat generated by various data processing equipment is increasing, and data centers have higher and higher requirements for the cooling capacity and energy saving of refrigeration equipment.

[0003] Fluorine pump air conditioners are usually used for cooling in data centers. Fluorine pump air conditioners usually use fluorine pumps as power sources to drive refrigerants to circulate using natural cold sources, which can reduce the energy consumption of fluorine pump air conditioners to a certain extent.

[0004] However, when the fluorine pump adopts a centrifugal pump, the refrigerant usually vaporizes during use, affecting the normal operation of the centrifugal pump. Summary of the invention

[0005] The present application provides a subcooling control method, device, storage medium and refrigeration equipment, which obtains the flow control valve opening corresponding to the bypass flow to be adjusted through a preset mapping relationship, saves the time of subcooling adjustment, and ensures the reliability of fluorine pump operation.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling supercooling, the method comprising:

[0007] When the degree of supercooling at the inlet of the fluorine pump is less than a first preset degree of supercooling, the flow regulating valve is opened to a preset opening; the flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump;

[0008] After the flow regulating valve is opened at the preset opening for the preset time, determining whether the subcooling degree at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling degree; the mixed inlet is located between the fluorine pump and the inlet;

[0009] If not, determining the target bypass flow of the refrigerant, and determining the target opening of the flow control valve corresponding to the target bypass flow according to a preset mapping relationship; the preset mapping relationship includes multiple bypass flows and the opening of the flow control valve corresponding to the bypass flow;

[0010] The flow control valve is opened to the target opening.

[0011] In a possible implementation, after determining the target bypass flow rate of the refrigerant, the method further includes:

[0012] If the preset mapping relationship does not include the target bypass flow, increasing the opening of the flow control valve by a first preset adjustment range;

[0013] After the opening of the flow control valve increases by the first preset adjustment amplitude for a preset time, determining whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree;

[0014] If not, the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude is performed again until the subcooling degree at the mixing inlet is greater than or equal to the first preset subcooling degree.

[0015] In a possible implementation, after the degree of subcooling at the mixing inlet is greater than or equal to the first preset degree of subcooling, the method further includes:

[0016] The current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow.

[0017] In a possible implementation, determining the target bypass flow rate of the refrigerant includes:

[0018] The target bypass flow rate of the refrigerant is determined based on the refrigerant enthalpy value at the inlet of the fluorine pump, the refrigerant flow rate at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump, and the refrigerant enthalpy value at the mixing inlet.

[0019] In a possible implementation, before determining the target bypass flow rate of the refrigerant based on the refrigerant enthalpy value at the inlet of the fluorine pump, the refrigerant flow rate at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump and the refrigerant enthalpy value at the mixed inlet, the method further includes:

[0020] Determining the refrigerant enthalpy at the inlet based on the inlet temperature and the inlet pressure;

[0021] Determine the refrigerant enthalpy at the outlet based on the refrigerant outlet temperature and outlet pressure at the outlet of the fluorine pump;

[0022] Determine the mixed inlet temperature at the mixed inlet of the fluorine pump based on the inlet temperature and the preset supercooling degree;

[0023] The refrigerant enthalpy value at the mixing inlet is determined based on the mixing inlet temperature at the mixing inlet of the fluorine pump and the mixing inlet pressure at the mixing inlet.

[0024] In a possible implementation, after the flow control valve is opened to the target opening, the method further includes:

[0025] After the flow control valve is opened at the target opening for a preset time, determining whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree;

[0026] If not, increasing the opening of the flow control valve by a first preset adjustment range;

[0027] After the opening of the flow control valve increases by a first preset adjustment amplitude for a preset time, determining whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree;

[0028] If not, the step of increasing the opening of the flow regulating valve by the first preset adjustment range is performed again until the subcooling degree at the mixing inlet is greater than or equal to the first preset subcooling degree;

[0029] The current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow.

[0030] In a possible implementation, after the flow control valve is opened to the target opening, the method further includes:

[0031] Determine whether the subcooling degree at the mixing inlet of the fluorine pump is greater than a second preset subcooling degree; the second preset subcooling degree is greater than the first preset subcooling degree;

[0032] When the degree of subcooling at the mixing inlet of the fluorine pump is greater than a second preset degree of subcooling, reducing the opening of the flow regulating valve by a second preset adjustment range;

[0033] After the opening of the flow regulating valve is reduced by the second preset adjustment amplitude for a preset time, the step of determining whether the supercooling degree at the mixed inlet of the fluorine pump is greater than the second preset supercooling degree is performed again until the supercooling degree at the mixed inlet is less than or equal to the second preset supercooling degree.

[0034] In a second aspect, an embodiment of the present application provides a subcooling control device, the subcooling control device comprising:

[0035] A first control module is used to open the flow regulating valve to a preset opening when the supercooling degree at the inlet of the fluorine pump is less than a first preset supercooling degree; the flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump;

[0036] A first judgment module is used to judge whether the supercooling degree at the mixed inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the flow regulating valve is opened at the preset opening for a preset time; the mixed inlet is located between the fluorine pump and the inlet;

[0037] A first determination module, for determining a target bypass flow rate of the refrigerant if the judgment module determines that the subcooling degree at the mixing inlet of the fluorine pump is less than the first preset subcooling degree, and determining a target opening degree of the flow control valve corresponding to the target bypass flow rate according to a preset mapping relationship; the preset mapping relationship includes a plurality of bypass flows and the opening degrees of the flow control valve corresponding to the bypass flows;

[0038] The second control module is used to open the flow regulating valve to the target opening.

[0039] In a possible implementation, the above-mentioned subcooling degree control device further includes:

[0040] A third control module, configured to increase the opening of the flow control valve by a first preset adjustment range if the preset mapping relationship does not include the target bypass flow;

[0041] A second judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the opening of the flow control valve increases by the first preset adjustment amplitude for a preset time period;

[0042] The third control module is further configured to: if not, execute again the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling.

[0043] In a possible implementation, the above-mentioned subcooling degree control device further includes:

[0044] The first updating module is used to maintain the current opening and update the preset mapping relationship according to the current opening and the target bypass flow.

[0045] In a possible implementation, the first determination module is specifically used to determine the target bypass flow of the refrigerant based on the refrigerant enthalpy value at the inlet of the fluorine pump, the refrigerant flow at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump, and the refrigerant enthalpy value at the mixed inlet.

[0046] In a possible implementation, the above-mentioned subcooling degree control device further includes:

[0047] A second determination module, configured to determine the refrigerant enthalpy at the inlet based on the inlet temperature and the inlet pressure;

[0048] A third determination module is used to determine the refrigerant enthalpy at the outlet based on the refrigerant outlet temperature and outlet pressure at the outlet of the fluorine pump;

[0049] A fourth determination module, used to determine the mixed inlet temperature at the mixed inlet of the fluorine pump based on the inlet temperature and a preset supercooling degree;

[0050] The fifth determination module is used to determine the refrigerant enthalpy at the mixing inlet based on the mixing inlet temperature at the mixing inlet of the fluorine pump and the mixing inlet pressure at the mixing inlet.

[0051] In a possible implementation, the above-mentioned subcooling degree control device further includes:

[0052] A third judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the opening degree of the flow control valve is opened at the target opening degree for a preset time period;

[0053] The third control module is further configured to: if not, increase the opening of the flow control valve by a first preset adjustment range;

[0054] The second judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the opening degree of the flow control valve increases by the first preset adjustment amplitude for a preset time period;

[0055] The third control module is further configured to: if not, execute again the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude until the subcooling degree at the mixing inlet is greater than or equal to the first preset subcooling degree;

[0056] The second updating module is used to maintain the current opening and update the preset mapping relationship according to the current opening and the target bypass flow.

[0057] In a possible implementation, the above-mentioned subcooling degree control device further includes:

[0058] The fourth judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than a second preset supercooling degree; the second preset supercooling degree is greater than the first preset supercooling degree;

[0059] A fourth control module, configured to reduce the opening of the flow regulating valve by a second preset adjustment range when the subcooling degree at the mixing inlet of the fluorine pump is greater than a second preset subcooling degree;

[0060] The fourth judgment module is also used for: after the opening of the flow control valve is reduced by the second preset adjustment amplitude for a preset time, the step of judging whether the supercooling at the mixed inlet of the fluorine pump is greater than the second preset supercooling is executed again, until the supercooling at the mixed inlet is less than or equal to the second preset supercooling.

[0061] In a third aspect, an embodiment of the present application provides a computer storage medium, wherein the computer storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the steps of the method provided in the first aspect of the embodiment of the present application or any possible implementation of the first aspect.

[0062] In a fourth aspect, an embodiment of the present application provides a refrigeration device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is suitable for being loaded by the processor and executing the steps of the method provided in the first aspect of the embodiment of the present application or any possible implementation of the first aspect.

[0063] In the embodiment of the present application, when the degree of subcooling at the inlet of the fluorine pump is less than the first preset degree of subcooling, the flow regulating valve arranged in the bypass pipeline is opened to a preset opening, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump; after the flow regulating valve is opened for a preset time at a preset opening, it is determined whether the degree of subcooling at the mixed inlet of the fluorine pump located between the fluorine pump and the inlet is greater than or equal to the first preset degree of subcooling; if not, the target bypass flow of the refrigerant is determined, and the target opening of the flow regulating valve corresponding to the target bypass flow is determined according to a preset mapping relationship, and the preset mapping relationship includes multiple bypass flows and The flow regulating valve opening corresponding to the flow rate; the flow regulating valve is opened to the target opening, and the high-pressure liquid refrigerant is introduced through the bypass pipeline of the fluorine pump outlet to bypass the fluorine pump inlet through the flow regulating valve, so as to increase the pressure of the fluorine pump inlet and increase the supercooling degree, solve the problem of gasification and flow interruption of the fluorine pump, make the fluorine pump run stably, balance and save energy, and obtain the flow regulating valve opening corresponding to the bypass flow to be adjusted through the preset mapping relationship, and then directly control the opening of the flow regulating valve set in the bypass pipeline according to the flow regulating valve opening corresponding to the bypass flow to be adjusted, thereby saving the time of supercooling adjustment and ensuring the reliability of the fluorine pump operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0065] Figure 1 A schematic diagram of the structure of a refrigeration device provided as an exemplary embodiment of the present application;

[0066] Figure 2 A structural schematic diagram of another refrigeration system provided for an exemplary embodiment of the present application;

[0067] Figure 3A schematic flow chart of a subcooling control method provided by an exemplary embodiment of the present application;

[0068] Figure 4 A schematic diagram of an implementation process of determining a target bypass flow of a refrigerant provided by an exemplary embodiment of the present application;

[0069] Figure 5 A schematic flow chart of another method for controlling undercooling provided by an exemplary embodiment of the present application;

[0070] Figure 6 A flow chart of another method for controlling undercooling provided by an exemplary embodiment of the present application;

[0071] Figure 7 A flow chart of another method for controlling undercooling provided by an exemplary embodiment of the present application;

[0072] Figure 8 A schematic diagram of an implementation process of a subcooling control method provided by an exemplary embodiment of the present application;

[0073] Fig. 9 A schematic structural diagram of a subcooling control device provided by an exemplary embodiment of the present application;

[0074] Fig.10 A schematic structural diagram of another refrigeration device provided as an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0075] In order to make the features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0076] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0077] Data centers are equipped with a variety of data processing equipment, which are arranged in rows in the data center, and air conditioning equipment used for cooling the data center is installed between rows of two adjacent data processing equipment. With the widespread application of 4G and the gradual popularization of 5G, the heat generated by various data processing equipment is increasing, and data centers have higher and higher requirements for the cooling capacity and energy saving of air conditioning equipment.

[0078] In order to meet the cooling needs of data centers and the energy-saving requirements of refrigeration equipment, fluorine pumps are usually used as power sources to drive the refrigerant cycle. Figure 1 , which is a schematic diagram of the structure of a refrigeration device provided by an exemplary embodiment of the present application. Figure 1 As shown, the refrigeration equipment may include a fluorine pump 110 , a flow regulating valve 120 , an electronic expansion valve 130 , an evaporator 140 , a compressor bypass pipe 150 , a compressor 160 , a condenser 170 , a liquid storage tank 180 and a fluorine pump bypass pipe 190 .

[0079] Specifically, the refrigeration equipment includes at least three working modes according to the change of ambient temperature, including:

[0080] Compressor cooling mode:

[0081] When the refrigeration equipment is in the compressor cooling mode, the compressor 160, the condenser 170, the liquid storage tank 180, the fluorine pump bypass pipe 190, the electronic expansion valve 130 and the evaporator 140 are connected in sequence to form a refrigeration system of the refrigeration equipment in the compressor cooling mode.

[0082] When the ambient temperature is high, for example, when the outdoor ambient temperature is greater than 20 degrees, the refrigeration equipment turns on the compressor refrigeration mode, and the fluorine pump 110 stops running.

[0083] The compressor refrigeration mode is specifically as follows: after being compressed, pressurized and heated by the compressor 160, the refrigerant is cooled and dissipated in the condenser 170 and enters the liquid storage tank 180, then passes through the fluorine pump bypass pipe 190 and enters the electronic expansion valve 130 to be throttled into a low-temperature and low-pressure liquid, and goes to the evaporator 140 to absorb heat, and finally returns to the compressor 160 for recycling.

[0084] Fluorine pump refrigeration mode:

[0085] When the refrigeration equipment is in the fluorine pump refrigeration mode, the fluorine pump 110, the electronic expansion valve 130, the evaporator 140, the compressor bypass pipe 150, the condenser 170 and the liquid storage tank 180 are connected in sequence to form a refrigeration system of the refrigeration equipment in the fluorine pump refrigeration mode.

[0086] When the ambient temperature is low, for example, the ambient temperature is less than 10 degrees (10 degrees can be understood as the set temperature value when the refrigeration equipment starts the fluorine pump refrigeration mode), the refrigeration equipment starts the fluorine pump refrigeration mode, and the compressor 160 stops running.

[0087] The fluorine pump refrigeration mode is specifically as follows: the refrigerant in the evaporator 140 exchanges heat with the air in the data center, so that the refrigerant evaporates and absorbs heat to reduce the air temperature in the data center. The refrigerant in the evaporator 140 evaporates into a gas with a higher temperature, and the gaseous refrigerant is transported to the condenser 170 through the compressor bypass check valve 150. The gaseous refrigerant in the condenser 170 exchanges heat with the air with a lower temperature outdoors, so that the gaseous high-temperature refrigerant condenses into a low-temperature liquid refrigerant. In order to match the refrigerant flow required by the refrigeration equipment, the low-temperature liquid refrigerant in the condenser 170 enters the liquid storage tank 180, and needs to be powered by the fluorine pump 110 to be transmitted to the evaporator 140. At the same time, an electronic expansion valve 130 is set between the fluorine pump 110 and the evaporator 140 for throttling, and after absorbing heat in the evaporator 140, it returns to the liquid storage tank 180 through the compressor bypass check valve 150 for recycling.

[0088] In order to avoid the problem of refrigerant vaporization causing the fluorine pump 110 to be disconnected, unable to start, or even damaged, the embodiment of the present application bypasses the high-pressure liquid refrigerant at the outlet 112 of the fluorine pump 110 to the inlet 111 of the fluorine pump 110 through the newly added flow regulating valve 120, thereby increasing the refrigerant pressure at the inlet 111 of the fluorine pump 110, thereby improving the supercooling degree of the fluorine pump inlet of the refrigeration equipment, and solving the problem of refrigerant vaporization and disconnection at the inlet of the fluorine pump.

[0089] The flow regulating valve 120 is disposed in a bypass pipeline, and the bypass pipeline is used to connect the outlet 112 of the fluorine pump 110 with the inlet 111. The flow regulating valve 120 is used to adjust the bypass flow of the fluorine pump 110 by controlling the opening of the flow regulating valve 120 when the supercooling degree at the inlet 111 of the fluorine pump 110 is less than a first preset supercooling degree, so as to control the supercooling degree at the inlet 111 of the fluorine pump 110.

[0090] It should be noted that if the degree of subcooling at the inlet 111 of the fluorine pump 110 is small, the refrigerant is likely to be vaporized and interrupted at the inlet 111 of the fluorine pump 110. In this way, when the refrigeration equipment is in the fluorine pump refrigeration mode, it is easy to cause the fluorine pump 110 to be interrupted, unable to start, or even damaged.

[0091] In order to avoid damage to the fluorine pump 110, it is necessary to control the supercooling degree at the inlet position of the fluorine pump 110 within a certain range to minimize the liquid refrigerant bypass while ensuring the reliability of the fluorine pump refrigeration mode, thereby reducing the fluorine pump power.

[0092] Blend Mode:

[0093] When the ambient temperature is slightly lower, for example, the outdoor ambient temperature is greater than 10 degrees and less than 20 degrees, the refrigeration device turns on the hybrid mode, that is, the compressor 160 and the fluorine pump 110 work at the same time. In the hybrid mode, since the compressor 160 operates at a variable frequency and has a slower speed, compared with the full frequency operation of the compressor 160 in the compressor cooling mode, the refrigeration device in the hybrid mode can achieve energy saving effect compared with the compressor cooling mode.

[0094] It should be noted that in the mixed mode of the refrigeration equipment, the compressor 160 and the fluorine pump 110 are running at the same time. If there is a phenomenon of refrigerant gasification at the inlet 111 of the fluorine pump 110, it is easy to cause the fluorine pump 110 to be disconnected, unable to start, or even damaged. Therefore, it is necessary to detect the supercooling at the inlet 111 of the fluorine pump, and adjust the supercooling to a suitable temperature range through the flow control valve 120 to avoid the inlet 111 of the fluorine pump 110. The supercooling affects the refrigeration effect, and even causes the fluorine pump to be damaged.

[0095] Commonly used refrigerants include Freon refrigerants, specifically R12 refrigerant, R22 refrigerant, R502 refrigerant, etc., which are not limited in this application.

[0096] It should be noted that the adjustment structure of the electronic expansion valve 130 and the flow control valve 120 can be, but is not limited to, a stepper motor. The minimum angle range of the stepper motor is called a step, and the adjustment of the opening of the electronic expansion valve 130 and the flow control valve 120 is usually calculated in "steps". For example, but not limited to, the opening adjustment range of the flow control valve 120 is 120 steps to 480 steps. When the opening adjustment step number of the flow control valve 120 is 480 steps, the opening of the flow control valve 120 is the largest, that is, the opening of the flow control valve 120 reaches the maximum value. In some embodiments, different types of electronic expansion valves 130 and flow control valves 120 have different step ranges for opening adjustment. The types of the electronic expansion valve 130 and the flow control valve 120 can be set according to actual needs, and this application does not limit it.

[0097] It should be noted that the fluorine pump 110 may be, but is not limited to, a centrifugal fluorine pump. The above-mentioned refrigeration equipment may be, but is not limited to, a fluorine pump air conditioner and the like.

[0098] It should be noted that, before the flow regulating valve 120 is opened, the inlet 111 corresponding to the fluorine pump 110 is the inlet A; after the flow regulating valve 120 is opened, the inlet 111 corresponding to the fluorine pump 110 is the mixing inlet B.

[0099] It should be understood that Figure 1The number of the fluorine pump 110, flow regulating valve 120, electronic expansion valve 130, evaporator 140, compressor bypass pipe 150, compressor 160, condenser 170, liquid storage tank 180 and fluorine pump bypass pipe 190 is schematic and can be set according to actual needs, and this application does not limit it.

[0100] Alternatively, if Figure 2 As shown, the refrigeration equipment may also only include the fluorine pump 110, the flow regulating valve 120, the electronic expansion valve 130, the evaporator 140, the compressor bypass pipe 150, the compressor 160, the condenser 170 and the liquid storage tank 180. That is, it can be decided whether to cancel the refrigeration equipment according to actual needs. Figure 1 The fluorine pump bypass pipe 190 in the refrigeration equipment shown in FIG. Figure 2 As shown, since the embodiment of the present application also bypasses part of the high-pressure liquid refrigerant at the outlet 112 of the fluorine pump 110 to the inlet 111 of the fluorine pump 110 through the newly added flow regulating valve 120, the refrigerant pressure at the inlet 111 of the fluorine pump 110 can be increased to a certain extent, thereby improving the supercooling degree of the fluorine pump inlet of the refrigeration equipment, and solving the problem of refrigerant gasification and flow interruption at the inlet of the fluorine pump.

[0101] It should be noted that due to Figure 2 The refrigeration device shown does not have the fluorine pump bypass pipe 190, so the refrigeration device does not have a compressor refrigeration mode, and at least has a fluorine pump refrigeration mode and a mixed refrigeration mode.

[0102] See next Figure 3 , which is a flow chart of a method for controlling supercooling provided by an exemplary embodiment of the present application. Figure 3 As shown, the subcooling control method may at least include:

[0103] S302, when the degree of supercooling at the inlet of the fluorine pump is less than a first preset degree of supercooling, opening the flow regulating valve to a preset opening degree.

[0104] Specifically, the refrigeration equipment can control the flow of the refrigerant by adjusting the opening of the flow regulating valve at the same time, thereby controlling the supercooling at the inlet of the fluorine pump. The flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump. The supercooling at the inlet of the fluorine pump refers to the temperature difference between the actual temperature of the liquid refrigerant at the inlet of the fluorine pump before opening the flow regulating valve and the saturation temperature.

[0105] Specifically, after the refrigeration equipment starts the fluorine pump refrigeration mode or mixed mode, if Figure 1The supercooling degree at the inlet A of the fluorine pump shown is less than the first preset supercooling degree, indicating that the fluorine pump may have gasified the liquid refrigerant at the inlet A of the fluorine pump when it is started and running. In order to ensure the refrigeration effect of the refrigeration equipment and avoid the problem of unstable operation of the refrigeration equipment or damage to the fluorine pump caused by the interruption of the fluorine pump, the flow regulating valve arranged in the bypass pipeline connecting the outlet C of the fluorine pump with the inlet A can be opened to a preset opening, so that part of the liquid refrigerant flowing out of the outlet C of the fluorine pump flows back to the inlet A of the fluorine pump through the flow regulating valve and mixes with the refrigerant flowing out of the liquid storage tank and then flows to the mixed inlet B of the fluorine pump, thereby increasing the supercooling degree of the fluorine pump inlet 111 and ensuring the stable operation of the fluorine pump in the refrigeration equipment. The above-mentioned first preset supercooling degree is used to characterize the minimum supercooling degree that can avoid the phenomenon of gasification and interruption of the refrigerant at the inlet of the fluorine pump, for example but not limited to 4°C. The above-mentioned preset opening can be set according to the actual refrigeration situation, for example but not limited to 4 steps, 6 steps, etc., and the embodiment of the present application does not limit this.

[0106] It can be understood that in order to avoid excessive adjustment of the supercooling at the inlet of the fluorine pump, which would lead to excessive bypass of liquid refrigerant at the inlet of the fluorine pump and cause excessive power of the fluorine pump, the above-mentioned preset opening should be set within a reasonable range according to actual conditions.

[0107] S304, after the flow regulating valve is opened at a preset opening for a preset time, it is determined whether the degree of subcooling at the mixing inlet of the fluorine pump is greater than or equal to a first preset degree of subcooling.

[0108] Specifically, the preset duration may be, but is not limited to, 10s, 15s, etc. Figure 1 As shown, the mixed inlet B is located between the fluorine pump 110 and the inlet A. After the flow control valve is opened at a preset opening for a preset time, the subcooling at the mixed inlet A of the fluorine pump, i.e., the mixed point where the flow control valve 120 and the liquid storage tank 180 are connected to the fluorine pump inlet A, will change (increase) relative to the subcooling at the fluorine pump inlet before the flow control valve is opened. In order to further ensure whether the subcooling at the mixed inlet of the fluorine pump has been adjusted to ensure the stable operation of the fluorine pump in the refrigeration equipment, it is further determined whether the subcooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling.

[0109] S306: If the degree of subcooling at the mixing inlet of the fluorine pump is less than the first preset degree of subcooling, a target bypass flow of the refrigerant is determined, and a target opening of the flow regulating valve corresponding to the target bypass flow is determined according to a preset mapping relationship.

[0110] Specifically, after the flow control valve is opened at a preset opening for a preset time, if the degree of subcooling at the mixed inlet B of the fluorine pump is still less than the first preset degree of subcooling, in order to improve the regulation efficiency of the degree of subcooling, the target bypass flow of the refrigerant required for the degree of subcooling at the inlet of the fluorine pump to reach the first preset degree of subcooling after the flow control valve is opened at a preset opening can be determined first, so that the target opening of the flow control valve corresponding to the target bypass flow can be directly determined according to the preset mapping relationship between the bypass flow and the opening of the flow control valve, thereby avoiding the problem of low efficiency of subcooling control caused by slowly adjusting the opening of the flow control valve step by step to adjust the degree of subcooling at the inlet of the fluorine pump to be greater than or equal to the first preset degree of subcooling. The above-mentioned preset mapping relationship includes multiple bypass flows and the flow control valve openings corresponding to each of the multiple bypass flows.

[0111] Specifically, Figure 4 As shown, the above-mentioned process of determining the target bypass flow rate of the refrigerant may include: determining the target bypass flow rate q2 of the refrigerant based on the refrigerant enthalpy value at the fluorine pump inlet A, the refrigerant flow rate at the fluorine pump inlet A, the refrigerant enthalpy value at the fluorine pump outlet C, and the refrigerant enthalpy value at the mixing inlet B.

[0112] Furthermore, if Figure 4 As shown, before determining the target bypass flow rate of the refrigerant based on the refrigerant enthalpy at the fluorine pump inlet A, the refrigerant flow at the fluorine pump inlet A, the refrigerant enthalpy at the fluorine pump outlet C and the refrigerant enthalpy at the mixed inlet B, the controller of the refrigeration equipment can also detect the fluorine pump liquid refrigerant outlet pressure P2, the refrigerant outlet temperature T2 and the inlet pressure P1, the inlet temperature T1, the inlet bypass flow Q1 before the flow regulating valve is opened, and the refrigerant inlet pressure Px after the flow regulating valve is opened, and it is also possible to: first determine the refrigerant enthalpy H1 at the inlet based on the inlet temperature T1 and the inlet pressure P1, for example but not limited to obtaining the refrigerant enthalpy H1 at the fluorine pump inlet corresponding to (P1, T1) by looking up the table according to (P1, T1). The refrigerant enthalpy value H1 is determined based on the refrigerant outlet temperature T2 and outlet pressure P2 at the fluorine pump outlet, for example, but not limited to, the refrigerant enthalpy value H2 at the fluorine pump outlet corresponding to (P2, T2) is obtained by looking up the table according to (P2, T2); the mixed inlet temperature Tx at the mixed inlet of the fluorine pump is determined based on the inlet temperature T1 and the preset supercooling degree Tsc0, for example, but not limited to Tx=T1+Tsc0; the refrigerant enthalpy value Hx at the mixed inlet is determined based on the mixed inlet temperature Tx at the mixed inlet of the fluorine pump and the mixed inlet pressure Px at the mixed inlet, for example, but not limited to, the refrigerant enthalpy value Hx at the mixed inlet of the fluorine pump corresponding to (Px, Tx) is obtained by looking up the table according to (Px, Tx). The above-mentioned preset supercooling degree Tsc0 can be, but not limited to, the first preset supercooling degree or any value greater than the first preset supercooling degree and less than the second preset supercooling degree, and the embodiments of the present application are no longer limited to this.

[0113] Based on the equal enthalpy values ​​before and after mixing, it can be concluded that: H1×Q1+H2×q2=Hx(Q1+q2), that is, the target bypass flow rate of refrigerant q2=(H1-Hx)×Q1 / (Hx-H2).

[0114] It should be noted that when the flow control valve is not opened, the target bypass flow rate of the refrigerant q2 = 0, and the above-mentioned Px = P1.

[0115] S308, opening the flow control valve to the target opening.

[0116] Specifically, after determining the target opening of the flow regulating valve corresponding to the target bypass flow according to the preset mapping relationship, the flow regulating valve can be directly opened to the target opening to efficiently control the subcooling at the mixing inlet of the fluorine pump to be greater than or equal to the first preset subcooling.

[0117] In the embodiment of the present application, when the degree of subcooling at the inlet of the fluorine pump is less than the first preset degree of subcooling, the flow regulating valve arranged in the bypass pipeline is opened to a preset opening, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump; after the flow regulating valve is opened for a preset time at a preset opening, it is determined whether the degree of subcooling at the mixed inlet of the fluorine pump located between the fluorine pump and the inlet is greater than or equal to the first preset degree of subcooling; if not, the target bypass flow of the refrigerant is determined, and the target opening of the flow regulating valve corresponding to the target bypass flow is determined according to a preset mapping relationship, and the preset mapping relationship includes multiple bypass flows and the target opening of the flow regulating valve corresponding to the bypass flow. The flow regulating valve opening corresponding to the amount is opened; the flow regulating valve is opened to the target opening, and the high-pressure liquid refrigerant is introduced through a partial circulation of the bypass pipeline at the fluorine pump outlet, and bypassed to the fluorine pump inlet through the flow regulating valve, so as to increase the pressure at the fluorine pump inlet and increase the supercooling degree, solve the problem of gasification and flow interruption of the fluorine pump, make the fluorine pump run stably, balance and save energy, and obtain the flow regulating valve opening corresponding to the bypass flow to be adjusted through the preset mapping relationship, and then directly control the opening of the flow regulating valve arranged on the bypass pipeline according to the flow regulating valve opening corresponding to the bypass flow to be adjusted, thereby saving the time of supercooling adjustment and ensuring the reliability of the fluorine pump operation.

[0118] See next Figure 5 , which is a flow chart of another method for controlling supercooling provided by an exemplary embodiment of the present application. Figure 5 As shown, the subcooling control method includes:

[0119] S502, when the degree of supercooling at the inlet of the fluorine pump is less than a first preset degree of supercooling, the flow regulating valve is opened to a preset opening.

[0120] Specifically, S502 is consistent with S302 and will not be described in detail here.

[0121] S504, after the flow regulating valve is opened at a preset opening for a preset time, it is determined whether the degree of subcooling at the mixing inlet of the fluorine pump is greater than or equal to a first preset degree of subcooling.

[0122] Specifically, S504 is consistent with S304 and will not be described in detail here.

[0123] S506: If the degree of subcooling at the mixing inlet of the fluorine pump is less than a first preset degree of subcooling, a target bypass flow rate of the refrigerant is determined.

[0124] Specifically, the implementation process of determining the target bypass flow rate of the refrigerant in S506 is consistent with that in S306, and will not be repeated here.

[0125] S508: Determine whether the preset mapping relationship includes the target bypass flow.

[0126] Specifically, after determining the target bypass flow of the refrigerant, in order to ensure the stable operation of the fluorine pump, it is possible to first determine whether the preset mapping relationship includes the target bypass flow. If the preset mapping relationship includes the target bypass flow, it means that the experiment has predetermined the target opening of the flow control valve corresponding to the target bypass flow, and the target opening of the flow control valve corresponding to the target bypass flow can be directly and efficiently determined according to the preset mapping relationship; if the preset mapping relationship does not include the target bypass flow, it means that the target opening of the flow control valve corresponding to the target bypass flow cannot be directly determined according to the preset mapping relationship, and new learning needs to be started and cyclic fine-tuning needs to be performed until the subcooling requirement is met (the subcooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling).

[0127] S510: If the preset mapping relationship includes a target bypass flow rate, a target opening of the flow control valve corresponding to the target bypass flow rate is determined according to the preset mapping relationship.

[0128] Specifically, the implementation process of determining the target opening of the flow control valve corresponding to the target bypass flow according to the preset mapping relationship in S510 is consistent with that in S306, and will not be repeated here.

[0129] S512, open the flow control valve to the target opening.

[0130] Specifically, S512 is consistent with S308 and will not be described in detail here.

[0131] Please continue to refer to Figure 5 ,like Figure 5 As shown, in S506, after determining the target bypass flow rate of the refrigerant, the subcooling control method further includes:

[0132] S514: If the preset mapping relationship does not include the target bypass flow, the opening of the flow control valve is increased by a first preset adjustment range.

[0133] Specifically, the first preset adjustment range may be, but is not limited to, 1 step, 2 steps, etc. If the preset mapping relationship does not include the target bypass flow, the opening of the flow control valve may be increased by the first preset adjustment range, that is, the flow control valve is increased from the preset opening to the first preset adjustment range.

[0134] S516, after the opening of the flow control valve increases by a first preset adjustment amplitude for a preset time period, determine whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to a first preset subcooling degree.

[0135] Specifically, after the opening of the flow regulating valve is increased by a first preset adjustment amplitude for a preset time period, if the supercooling at the mixing inlet of the fluorine pump is less than the first preset supercooling, S514 is executed again to increase the opening of the flow regulating valve by the first preset adjustment amplitude until the supercooling at the mixing inlet is greater than or equal to the first preset supercooling.

[0136] Please continue to refer to Figure 5 ,like Figure 5 As shown, in S516, after the opening of the flow control valve increases by a first preset adjustment amplitude for a preset time, it is determined whether the subcooling degree at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling degree, the subcooling degree control method further includes:

[0137] S518: If the degree of subcooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset degree of subcooling, the current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow rate.

[0138] Specifically, the current opening An=preset opening A+first preset adjustment amplitude a×number of times n adjusted with the first preset adjustment amplitude. If the supercooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset supercooling, the flow control valve can be controlled to maintain the current opening, and the preset mapping relationship can be updated according to the current opening and the target bypass flow, so as to timely and efficiently realize the preset mapping relationship between the opening of the flow control valve and the target bypass flow required at the inlet of the fluorine pump after the flow control valve is opened to the preset opening, so that when the same target bypass flow is encountered later, the flow control valve can be directly adjusted to the current opening corresponding to the above target bypass flow according to the updated preset mapping relationship.

[0139] See next Figure 6 , which is a flow chart of another method for controlling supercooling provided by an exemplary embodiment of the present application. Figure 6 As shown, the subcooling control method includes:

[0140] S602, when the degree of supercooling at the inlet of the fluorine pump is less than a first preset degree of supercooling, the flow regulating valve is opened to a preset opening.

[0141] Specifically, S602 is consistent with S302 and will not be described in detail here.

[0142] S604, after the flow regulating valve is opened at a preset opening for a preset time, determine whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to a first preset subcooling degree.

[0143] Specifically, S604 is consistent with S304 and will not be described in detail here.

[0144] S606: If the subcooling degree at the mixing inlet of the fluorine pump is less than the first preset subcooling degree, a target bypass flow rate of the refrigerant is determined, and a target opening degree of the flow control valve corresponding to the target bypass flow rate is determined according to a preset mapping relationship.

[0145] Specifically, S606 is consistent with S306 and will not be described in detail here.

[0146] S608, open the flow control valve to the target opening.

[0147] Specifically, S608 is consistent with S308 and will not be described in detail here.

[0148] S610, after the flow control valve is opened at the target opening for a preset time, determine whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to a first preset subcooling degree.

[0149] Specifically, after the flow regulating valve is opened at the target opening for a preset time, in order to further ensure the stability and reliability of the fluorine pump operation, it is possible to judge again whether the supercooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset supercooling, so as to further determine whether the supercooling at the mixed inlet of the fluorine pump has met the supercooling requirement (the supercooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset supercooling).

[0150] S612: If the degree of subcooling at the mixed inlet of the fluorine pump is less than a first preset degree of subcooling, the opening of the flow regulating valve is increased by a first preset adjustment range.

[0151] Specifically, after the flow control valve is opened at the target opening for a preset time, if the supercooling degree at the fluorine pump mixing inlet is less than the first preset supercooling degree, the flow control valve opening can be fine-tuned again with the first preset adjustment amplitude. The first preset adjustment amplitude is less than the target opening.

[0152] S614, after the opening of the flow control valve increases by a first preset adjustment amplitude for a preset time period, determine whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to a first preset subcooling degree.

[0153] Specifically, after the opening of the flow regulating valve is increased by the first preset adjustment amplitude for a preset time period, if the supercooling at the mixing inlet of the fluorine pump is still less than the first preset supercooling, the above S612 can be executed again to increase the opening of the flow regulating valve by the first preset adjustment amplitude, and gradually fine-tune the opening of the flow regulating valve by the first preset adjustment amplitude until the supercooling at the mixing inlet is greater than or equal to the first preset supercooling.

[0154] S616: If the degree of subcooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset degree of subcooling, the current opening is maintained, and a preset mapping relationship is updated according to the current opening and the target bypass flow rate.

[0155] Specifically, the current opening Bn=target opening B+first preset adjustment amplitude a×number of times n adjusted with the first preset adjustment amplitude. If the supercooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset supercooling, the flow control valve can be controlled to maintain the current opening, and the preset mapping relationship can be updated according to the current opening and the target bypass flow, so as to further update the flow control valve opening corresponding to the target bypass flow required at the inlet of the fluorine pump after the flow control valve is opened to the preset opening in the preset mapping relationship, and improve the accuracy of the flow control valve opening corresponding to the bypass flow in the preset mapping relationship, so that when the same target bypass flow is encountered later, the flow control valve can be directly adjusted to the current opening corresponding to the above target bypass flow according to the more accurate preset mapping relationship, and the efficiency and accuracy of supercooling control can be further improved.

[0156] See next Figure 7 , which is a flow chart of another method for controlling supercooling provided by an exemplary embodiment of the present application. Figure 7 As shown, the subcooling control method includes:

[0157] S702, when the degree of supercooling at the inlet of the fluorine pump is less than a first preset degree of supercooling, the flow regulating valve is opened to a preset opening.

[0158] Specifically, S702 is consistent with S302 and will not be repeated here.

[0159] S704, after the flow regulating valve is opened at a preset opening for a preset time, determine whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to a first preset subcooling degree.

[0160] Specifically, S704 is consistent with S304 and will not be described in detail here.

[0161] S706: If not, determine the target bypass flow of the refrigerant, and determine the target opening of the flow control valve corresponding to the target bypass flow according to a preset mapping relationship.

[0162] Specifically, S706 is consistent with S306 and will not be described in detail here.

[0163] S708, open the flow control valve to the target opening.

[0164] Specifically, S708 is consistent with S308 and will not be repeated here.

[0165] S710, determining whether the degree of subcooling at the mixing inlet of the fluorine pump is greater than a second preset degree of subcooling.

[0166] Specifically, in order to avoid the problem that the supercooling at the mixed inlet of the fluorine pump is too large, which leads to an increase in the power of the fluorine pump and an increase in the energy consumption of the refrigeration equipment, after the flow regulating valve is opened to the target opening, it is further possible to determine whether the supercooling at the mixed inlet of the fluorine pump is greater than a second preset supercooling. The second preset supercooling is greater than the first preset supercooling, and can be, but is not limited to, 6°C.

[0167] S712, when the degree of subcooling at the mixed inlet of the fluorine pump is greater than the second preset degree of subcooling, reducing the opening of the flow regulating valve by a second preset adjustment range.

[0168] Specifically, when the degree of supercooling at the mixed inlet of the fluorine pump is greater than the second preset degree of supercooling, it means that the degree of supercooling at the mixed inlet of the fluorine pump is too large, and the opening of the flow regulating valve will be reduced by the second preset adjustment range to reduce the degree of supercooling at the mixed inlet of the fluorine pump. The second preset adjustment range can be the same as the first preset adjustment range, or it can be different, and the embodiment of the present application is not limited to this.

[0169] S714, after the opening of the flow control valve is reduced by a second preset adjustment amplitude for a preset time, the step of determining whether the supercooling at the mixing inlet of the fluorine pump is greater than the second preset supercooling is executed again, until the supercooling at the mixing inlet is less than or equal to the second preset supercooling.

[0170] Specifically, after the opening of the flow regulating valve is reduced by a second preset adjustment amplitude for a preset time, S710 is executed again to determine whether the supercooling at the mixing inlet of the fluorine pump is greater than the second preset supercooling. The supercooling adjustment is terminated only when the supercooling at the mixing inlet is less than or equal to the second preset supercooling.

[0171] See next Figure 8 , which is a schematic diagram of the implementation process of a supercooling control method provided by an exemplary embodiment of the present application. Figure 8As shown, after the refrigeration equipment turns on the fluorine pump refrigeration mode or the mixed refrigeration mode, the inlet temperature and inlet pressure at the inlet of the fluorine pump of the refrigeration equipment can be detected first, and the subcooling at the inlet of the fluorine pump can be determined according to the inlet temperature at the inlet of the fluorine pump. If the subcooling at the inlet of the fluorine pump is less than the first preset subcooling, it means that the refrigeration effect of the fluorine pump is not good, and there may be gasification of liquid refrigerant at the inlet, resulting in cavitation and flow interruption, causing unstable operation of the refrigeration system, or even damage to the fluorine pump. In this case, the flow regulating valve corresponding to the fluorine pump can be directly opened to the preset opening, and the subcooling at the inlet of the fluorine pump (mixed inlet) can be controlled within a range greater than or equal to the first preset subcooling and less than or equal to the second preset subcooling according to the processes shown in S504-S518, S604-S616 and S704-S714 above. The high-pressure liquid refrigerant is introduced through the bypass pipeline at the outlet of the fluorine pump, and bypassed to the inlet of the fluorine pump through the flow regulating valve, so as to increase the pressure at the inlet of the fluorine pump and increase the subcooling, solve the gasification and flow interruption of the fluorine pump, and make the fluorine pump stable. Stable operation and balanced energy saving can be achieved, and the flow control valve opening corresponding to the bypass flow that needs to be adjusted can be obtained through the preset mapping relationship, and then the flow control valve opening set in the bypass pipeline can be directly controlled according to the flow control valve opening corresponding to the bypass flow that needs to be adjusted, thereby saving the time for supercooling adjustment and ensuring the reliability of the fluorine pump operation. The preset mapping relationship between the flow control valve opening and the target bypass flow required at the inlet of the fluorine pump after the flow control valve is opened to the preset opening can also be realized in a timely and efficient manner, so that when the same target bypass flow is encountered later, the flow control valve can be directly adjusted to the current opening corresponding to the above-mentioned target bypass flow according to the updated preset mapping relationship, and the fluorine pump power can be controlled by controlling the supercooling at the mixed inlet of the fluorine pump, thereby avoiding the problem of excessive increase in energy consumption of refrigeration equipment.

[0172] See next Fig. 9 , which is a schematic diagram of the structure of a subcooling control device provided by an exemplary embodiment of the present application. Fig. 9 As shown, the subcooling control device 900 includes:

[0173] The first control module 910 is used to open the flow regulating valve to a preset opening when the supercooling degree at the inlet of the fluorine pump is less than a first preset supercooling degree; the flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump;

[0174] The first judgment module 920 is used to judge whether the subcooling degree at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling degree after the flow regulating valve is opened at the preset opening for a preset time; the mixed inlet is located between the fluorine pump and the inlet;

[0175] A first determination module 930 is used to determine the target bypass flow rate of the refrigerant if the judgment module determines that the subcooling degree at the mixed inlet of the fluorine pump is less than the first preset subcooling degree, and determine the target opening degree of the flow control valve corresponding to the target bypass flow rate according to a preset mapping relationship; the preset mapping relationship includes multiple bypass flows and the opening degrees of the flow control valve corresponding to the bypass flows;

[0176] The second control module 940 is used to open the flow control valve to the target opening.

[0177] In a possible implementation, the above-mentioned subcooling degree control device 900 further includes:

[0178] A third control module, configured to increase the opening of the flow control valve by a first preset adjustment range if the preset mapping relationship does not include the target bypass flow;

[0179] A second judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the opening of the flow control valve increases by the first preset adjustment amplitude for a preset time period;

[0180] The third control module is further configured to: if not, execute again the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling.

[0181] In a possible implementation, the above-mentioned subcooling degree control device 900 further includes:

[0182] The first updating module is used to maintain the current opening and update the preset mapping relationship according to the current opening and the target bypass flow.

[0183] In a possible implementation, the first determination module 930 is specifically used to determine the target bypass flow of the refrigerant based on the refrigerant enthalpy value at the inlet of the fluorine pump, the refrigerant flow at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump, and the refrigerant enthalpy value at the mixed inlet.

[0184] In a possible implementation, the above-mentioned subcooling degree control device 900 further includes:

[0185] A second determination module, configured to determine the refrigerant enthalpy at the inlet based on the inlet temperature and the inlet pressure;

[0186] A third determination module is used to determine the refrigerant enthalpy at the outlet based on the refrigerant outlet temperature and outlet pressure at the outlet of the fluorine pump;

[0187] A fourth determination module, used to determine the mixed inlet temperature at the mixed inlet of the fluorine pump based on the inlet temperature and a preset supercooling degree;

[0188] The fifth determination module is used to determine the refrigerant enthalpy at the mixing inlet based on the mixing inlet temperature at the mixing inlet of the fluorine pump and the mixing inlet pressure at the mixing inlet.

[0189] In a possible implementation, the above-mentioned subcooling degree control device 900 further includes:

[0190] A third judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the opening degree of the flow control valve is opened at the target opening degree for a preset time period;

[0191] The third control module is further configured to: if not, increase the opening of the flow control valve by a first preset adjustment range;

[0192] The second judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset supercooling degree after the opening degree of the flow control valve increases by the first preset adjustment amplitude for a preset time period;

[0193] The third control module is further configured to: if not, execute again the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude until the subcooling degree at the mixing inlet is greater than or equal to the first preset subcooling degree;

[0194] The second updating module is used to maintain the current opening and update the preset mapping relationship according to the current opening and the target bypass flow.

[0195] In a possible implementation, the above-mentioned subcooling degree control device 900 further includes:

[0196] The fourth judgment module is used to judge whether the supercooling degree at the mixing inlet of the fluorine pump is greater than a second preset supercooling degree; the second preset supercooling degree is greater than the first preset supercooling degree;

[0197] A fourth control module, configured to reduce the opening of the flow regulating valve by a second preset adjustment range when the subcooling degree at the mixing inlet of the fluorine pump is greater than a second preset subcooling degree;

[0198] The fourth judgment module is also used for: after the opening of the flow control valve is reduced by the second preset adjustment amplitude for a preset time, the step of judging whether the supercooling at the mixed inlet of the fluorine pump is greater than the second preset supercooling is executed again, until the supercooling at the mixed inlet is less than or equal to the second preset supercooling.

[0199] The division of the modules in the above-mentioned subcooling control device is only for illustration. In other embodiments, the subcooling control device can be divided into different modules as needed to complete all or part of the functions of the above-mentioned subcooling control device. The implementation of each module in the subcooling control device provided in the embodiment of this specification can be in the form of a computer program. The computer program can be run on the refrigeration device. The program module composed of the computer program can be stored in the memory of the refrigeration device. When the computer program is executed by the processor, all or part of the steps of the subcooling control method described in the embodiment of this specification are implemented.

[0200] An embodiment of the present application further provides a computer storage medium, which can store multiple instructions, and the instructions are suitable for being loaded by a processor and executing the steps of any method in the above embodiments.

[0201] See next Fig.10 , which is a schematic diagram of the structure of a refrigeration device provided in an embodiment of the present application. Fig.10 As shown, the refrigeration device 1000 may include: at least one processor 1010 , at least one network interface 1040 , a user interface 1030 , a memory 1050 , and at least one communication bus 1020 .

[0202] The communication bus 1020 is used to realize the connection and communication between these components.

[0203] The user interface 1030 may include a display screen (Display) and a camera (Camera), and the optional user interface 1030 may also include a standard wired interface and a wireless interface.

[0204] The network interface 1040 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0205] Among them, the refrigeration equipment processor 1010 may include one or more processing cores. The refrigeration equipment processor 1010 uses various interfaces and lines to connect various parts within the entire refrigeration equipment 1000, and executes various functions and processes data of the refrigeration equipment 1000 by running or executing instructions, programs, code sets or instruction sets stored in the memory 1050, and calling data stored in the memory 1050. Optionally, the refrigeration equipment processor 1010 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The refrigeration equipment processor 1010 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communication. It is understandable that the above-mentioned modem may not be integrated into the refrigeration equipment processor 1010, but may be implemented by a separate chip.

[0206] The memory 1050 may include a random access memory (RAM) or a read-only memory (ROM). Optionally, the memory 1050 includes a non-transitory computer-readable storage medium. The memory 1050 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 1050 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a control function, a judgment function, a determination, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 1050 may optionally be at least one storage device located away from the aforementioned refrigeration equipment processor 1010. As Fig.10 As shown, the memory 1050 as a computer storage medium may include an operating system, a network communication module, a user interface module, and program instructions.

[0207] exist Fig.10In the refrigeration device 1000 shown, the user interface 1030 is mainly used to provide an input interface for the user and obtain data input by the user; and the processor 1010 can be used to call the program instructions stored in the memory 1050 and specifically perform the following operations:

[0208] When the degree of subcooling at the inlet of the fluorine pump is less than the first preset degree of subcooling, the flow regulating valve is opened to a preset opening; the flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump; after the flow regulating valve is opened for a preset time at the preset opening, it is determined whether the degree of subcooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset degree of subcooling; the mixed inlet is located between the fluorine pump and the inlet; if not, the target bypass flow of the refrigerant is determined, and the target opening of the flow regulating valve corresponding to the target bypass flow is determined according to a preset mapping relationship; the preset mapping relationship includes multiple bypass flows and the flow regulating valve openings corresponding to the bypass flows; the flow regulating valve is opened to the target opening.

[0209] In some possible embodiments, after executing the above-mentioned determination of the target bypass flow rate of the refrigerant, the processor 1010 is further configured to execute:

[0210] If the target bypass flow is not included in the preset mapping relationship, the opening of the flow regulating valve is increased by a first preset adjustment amplitude; after the opening of the flow regulating valve is increased by the first preset adjustment amplitude for a preset time, it is determined whether the supercooling at the mixed inlet of the fluorine pump is greater than or equal to the first preset supercooling; if not, the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude is performed again until the supercooling at the mixed inlet is greater than or equal to the first preset supercooling.

[0211] In some possible embodiments, after executing the above until the degree of subcooling at the mixing inlet is greater than or equal to the first preset degree of subcooling, the processor 1010 is further configured to execute:

[0212] The current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow.

[0213] In some possible embodiments, when the processor 1010 executes the above-mentioned determination of the target bypass flow of the above-mentioned refrigerant, it is specifically used to execute: determine the target bypass flow of the above-mentioned refrigerant based on the refrigerant enthalpy value at the inlet of the above-mentioned fluorine pump, the refrigerant flow at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump and the refrigerant enthalpy value at the mixed inlet.

[0214] In some possible embodiments, before executing the above-mentioned determination of the target bypass flow rate of the refrigerant based on the refrigerant enthalpy value at the inlet of the fluorine pump, the refrigerant flow rate at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump, and the refrigerant enthalpy value at the mixed inlet, the processor 1010 is further used to execute:

[0215] The refrigerant enthalpy value at the inlet is determined based on the above-mentioned inlet temperature and the above-mentioned inlet pressure; the refrigerant enthalpy value at the outlet is determined based on the refrigerant outlet temperature and the outlet pressure at the above-mentioned fluorine pump outlet; the mixed inlet temperature at the above-mentioned fluorine pump mixed inlet is determined based on the above-mentioned inlet temperature and the preset supercooling degree; the refrigerant enthalpy value at the mixed inlet is determined based on the mixed inlet temperature at the above-mentioned fluorine pump mixed inlet and the mixed inlet pressure at the mixed inlet.

[0216] In some possible embodiments, after executing the above-mentioned opening of the flow control valve to the above-mentioned target opening degree, the processor 1010 is further configured to execute:

[0217] After the opening of the above-mentioned flow control valve is opened for a preset time at the above-mentioned target opening, determine whether the supercooling at the above-mentioned fluorine pump mixing inlet is greater than or equal to the above-mentioned first preset supercooling; if not, increase the opening of the above-mentioned flow control valve by the first preset adjustment amplitude; after the opening of the above-mentioned flow control valve is increased for a preset time at the first preset adjustment amplitude, determine whether the supercooling at the above-mentioned fluorine pump mixing inlet is greater than or equal to the above-mentioned first preset supercooling; if not, execute the above-mentioned step of increasing the opening of the above-mentioned flow control valve by the first preset adjustment amplitude again until the supercooling at the above-mentioned mixing inlet is greater than or equal to the above-mentioned first preset supercooling; maintain the current opening, and update the above-mentioned preset mapping relationship according to the above-mentioned current opening and the above-mentioned target bypass flow.

[0218] In some possible embodiments, after executing the above-mentioned opening of the flow control valve to the above-mentioned target opening degree, the processor 1010 is further configured to execute:

[0219] Determine whether the supercooling degree at the mixed inlet of the fluorine pump is greater than a second preset supercooling degree; the second preset supercooling degree is greater than the first preset supercooling degree; when the supercooling degree at the mixed inlet of the fluorine pump is greater than the second preset supercooling degree, reduce the opening of the flow regulating valve by a second preset adjustment amplitude; after the opening of the flow regulating valve is reduced by the second preset adjustment amplitude for a preset time, perform the step of determining whether the supercooling degree at the mixed inlet of the fluorine pump is greater than the second preset supercooling degree again, until the supercooling degree at the mixed inlet is less than or equal to the second preset supercooling degree.

[0220] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0221] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0222] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The above computer program product includes one or more computer instructions. When the above computer program instructions are loaded and executed on a computer, the above process or function according to the embodiment of this specification is generated in whole or in part. The above computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The above computer instructions can be stored in a computer-readable storage medium or transmitted by the above computer-readable storage medium. The above computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The above computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The above-mentioned available media can be magnetic media (for example, floppy disks, hard disks, tapes), optical media (for example, digital versatile discs (DVD)), or semiconductor media (for example, solid state drives (SSD)), etc.

[0223] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0224] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0225] The above is a description of a subcooling control method, device, storage medium and refrigeration equipment provided by the present application. For technicians in this field, according to the ideas of the embodiments of the present application, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for controlling supercooling, characterized in that: The method comprises: When the degree of supercooling at the inlet of the fluorine pump is less than a first preset degree of supercooling, the flow regulating valve is opened to a preset opening; the flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump; After the flow regulating valve is opened at the preset opening for a preset time, determining whether the subcooling degree at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling degree; the mixed inlet is located between the fluorine pump and the inlet; If not, determining the target bypass flow of the refrigerant, and determining the target opening of the flow control valve corresponding to the target bypass flow according to a preset mapping relationship; the preset mapping relationship includes multiple bypass flows and the opening of the flow control valve corresponding to the bypass flow; The flow control valve is opened to the target opening degree.

2. The method according to claim 1, characterized in that After determining the target bypass flow rate of the refrigerant, the method further includes: If the preset mapping relationship does not include the target bypass flow, increasing the opening of the flow control valve by a first preset adjustment range; After the opening of the flow control valve increases by the first preset adjustment amplitude for a preset time, determining whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree; If not, the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude is performed again until the subcooling degree at the mixing inlet is greater than or equal to the first preset subcooling degree.

3. The method according to claim 2, characterized in that After the degree of subcooling at the mixing inlet is greater than or equal to the first preset degree of subcooling, the method further comprises: The current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow.

4. The method according to claim 1, characterized in that The determining the target bypass flow rate of the refrigerant includes: The target bypass flow rate of the refrigerant is determined based on the refrigerant enthalpy value at the fluorine pump inlet, the refrigerant flow rate at the fluorine pump inlet, the refrigerant enthalpy value at the fluorine pump outlet, and the refrigerant enthalpy value at the mixing inlet.

5. The method according to claim 4, characterized in that Before determining the target bypass flow rate of the refrigerant based on the refrigerant enthalpy value at the inlet of the fluorine pump, the refrigerant flow rate at the inlet of the fluorine pump, the refrigerant enthalpy value at the outlet of the fluorine pump and the refrigerant enthalpy value at the mixed inlet, the method further includes: determining the refrigerant enthalpy at the inlet based on the inlet temperature and the inlet pressure; Determining the refrigerant enthalpy at the outlet based on the refrigerant outlet temperature and outlet pressure at the outlet of the fluorine pump; Determining the mixed inlet temperature at the mixed inlet of the fluorine pump based on the inlet temperature and a preset degree of subcooling; The refrigerant enthalpy value at the mixing inlet is determined based on the mixing inlet temperature at the mixing inlet of the fluorine pump and the mixing inlet pressure at the mixing inlet.

6. The method according to any one of claims 1 to 5, characterized in that: After the flow regulating valve is opened to the target opening, the method further includes: After the flow control valve is opened at the target opening for a preset time, determining whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree; If not, increasing the opening of the flow control valve by a first preset adjustment range; After the opening of the flow control valve increases by a first preset adjustment amplitude for a preset time, determining whether the subcooling degree at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree; If not, the step of increasing the opening of the flow regulating valve by the first preset adjustment amplitude is performed again until the subcooling degree at the mixing inlet is greater than or equal to the first preset subcooling degree; The current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow.

7. The method according to any one of claims 1 to 5, characterized in that: After the flow regulating valve is opened to the target opening, the method further includes: Determining whether the degree of subcooling at the mixing inlet of the fluorine pump is greater than a second preset degree of subcooling; the second preset degree of subcooling is greater than the first preset degree of subcooling; When the degree of subcooling at the mixing inlet of the fluorine pump is greater than a second preset degree of subcooling, reducing the opening of the flow regulating valve by a second preset adjustment range; After the opening of the flow regulating valve is reduced by the second preset adjustment amplitude for a preset time, the step of determining whether the supercooling at the mixing inlet of the fluorine pump is greater than the second preset supercooling is performed again until the supercooling at the mixing inlet is less than or equal to the second preset supercooling.

8. A subcooling control device, characterized in that: The device comprises: A first control module is used to open the flow regulating valve to a preset opening when the supercooling degree at the inlet of the fluorine pump is less than a first preset supercooling degree; the flow regulating valve is arranged in a bypass pipeline, and the bypass pipeline is used to connect the outlet and the inlet of the fluorine pump; A first judgment module is used to judge whether the subcooling degree at the mixed inlet of the fluorine pump is greater than or equal to the first preset subcooling degree after the flow regulating valve is opened at the preset opening for a preset time; the mixed inlet is located between the fluorine pump and the inlet; a first determination module, configured to determine a target bypass flow rate of the refrigerant if the judgment module determines that the subcooling degree at the mixed inlet of the fluorine pump is less than the first preset subcooling degree, and determine a target opening degree of the flow control valve corresponding to the target bypass flow rate according to a preset mapping relationship; the preset mapping relationship includes a plurality of bypass flows and the opening degrees of the flow control valve corresponding to the bypass flows; The second control module is used to open the flow regulating valve to the target opening degree.

9. A computer storage medium, characterized in that The computer storage medium stores a plurality of instructions, which are suitable for being loaded by a processor and executing the steps of the method according to any one of claims 1 to 7.

10. A refrigeration device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 7 when executing the program.

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