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

Abstract

The embodiment of the application provides a supercooling degree control method and device, a storage medium and a refrigeration equipment. In the case that the supercooling degree at the fluorine pump inlet is less than a first preset supercooling degree, a flow regulating valve arranged in a bypass pipeline is opened to a preset opening degree, the bypass pipeline is used for connecting the outlet and the inlet of the fluorine pump; after the flow regulating valve is opened to the preset opening degree for a preset time length, it is judged whether the supercooling degree at the fluorine pump mixing inlet between the fluorine pump and the inlet is greater than or equal to the first preset supercooling degree; if not, the target bypass flow of the refrigerant is determined, and the target opening degree of the flow regulating valve corresponding to the target bypass flow is determined according to a preset mapping relationship, the preset mapping relationship includes a plurality of bypass flows and the flow regulating valve opening degrees corresponding to the bypass flows; the flow regulating valve is opened to the target opening degree, the opening degree of the flow regulating valve corresponding to the bypass flow to be adjusted is obtained through the preset mapping relationship, the time for supercooling degree adjustment is saved, and the reliability of fluorine pump operation is ensured.

Description

Technical Field

[0001] This application relates to the field of subcooling control technology, and in particular to a subcooling control method, apparatus, storage medium, and refrigeration equipment. Background Technology

[0002] Data centers are equipped with a variety of data processing devices. With the widespread application of 4G and the gradual popularization of 5G, the heat generated by these devices is increasing, and data centers are placing higher demands on the cooling capacity and energy efficiency of their cooling equipment.

[0003] Data centers typically use refrigerant pump air conditioning for cooling. Refrigerant pump air conditioning uses a refrigerant pump as a power source to drive the refrigerant circulation through natural cold sources, which can reduce energy consumption to some extent.

[0004] However, when a centrifugal pump is used in a refrigerant pump, the refrigerant often vaporizes during operation, affecting the normal operation of the centrifugal pump. Summary of the Invention

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

[0006] In a first aspect, embodiments of this application provide a method for controlling subcooling, the method comprising:

[0007] If the subcooling at the inlet of the fluorine pump is less than the first preset subcooling, the flow regulating valve is opened to the preset opening degree; the flow regulating valve is provided in the bypass line, which is used to connect the outlet and inlet of the fluorine pump.

[0008] After the flow regulating valve is opened at the preset opening degree for a preset time, it is determined whether the subcooling at the mixing inlet of the refrigerant pump is greater than or equal to the first preset subcooling degree; the mixing inlet is located between the refrigerant pump and the inlet.

[0009] If not, then determine the target bypass flow rate of the refrigerant and determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to the preset mapping relationship; the preset mapping relationship includes multiple bypass flow rates and the opening degree of the flow regulating valve corresponding to the bypass flow rate.

[0010] Open the flow regulating valve to the target opening degree.

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

[0012] If the target bypass flow is not included in the above preset mapping relationship, the opening of the flow regulating valve is increased by the first preset adjustment range.

[0013] After the opening of the flow regulating valve is increased by the first preset adjustment range for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling.

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

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

[0016] Maintain the current opening and update the preset mapping relationship based on the current opening and the target bypass flow.

[0017] In one 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 at the inlet of the refrigerant pump, the refrigerant flow rate at the inlet of the refrigerant pump, the refrigerant enthalpy at the outlet of the refrigerant pump, and the refrigerant enthalpy at the mixing inlet.

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

[0020] The refrigerant enthalpy at the inlet is determined based on the above inlet temperature and inlet pressure.

[0021] The refrigerant enthalpy at the outlet is determined based on the refrigerant outlet temperature and outlet pressure at the outlet of the aforementioned fluorine pump.

[0022] The mixing inlet temperature at the mixing inlet of the fluorine pump is determined based on the above inlet temperature and the preset subcooling.

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

[0024] In one possible implementation, after opening the flow regulating valve to the target opening degree, the method further includes:

[0025] After the flow regulating valve is opened to the target opening for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling.

[0026] If not, the opening of the flow regulating valve is increased by the first preset adjustment range;

[0027] After the opening of the flow regulating valve is increased by a first preset adjustment range for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling.

[0028] If not, then repeat the above steps of increasing the opening of the flow regulating valve by the first preset adjustment range until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling.

[0029] Maintain the current opening and update the preset mapping relationship based on the current opening and the target bypass flow.

[0030] In one possible implementation, after opening the flow regulating valve to the target opening degree, the method further includes:

[0031] Determine whether the subcooling at the mixing inlet of the refrigerant pump is greater than the second preset subcooling; the second preset subcooling is greater than the first preset subcooling.

[0032] When the subcooling at the mixing inlet of the above-mentioned fluorine pump is greater than the second preset subcooling, the opening of the above-mentioned flow regulating valve is reduced by the second preset adjustment range;

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

[0034] Secondly, embodiments of this application provide a subcooling control device, which includes:

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

[0036] The first judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the flow regulating valve is opened at the preset opening degree for a preset time; the mixing inlet is located between the fluorine pump and the inlet.

[0037] The first determining module is used to determine the target bypass flow rate of the refrigerant if the determination module determines that the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling. The module then determines the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to a preset mapping relationship. The preset mapping relationship includes multiple bypass flow rates and the opening degree of the flow regulating valve corresponding to the bypass flow rates.

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

[0039] In one possible implementation, the aforementioned subcooling control device further includes:

[0040] The third control module is used to increase the opening of the flow regulating valve by a first preset adjustment range if the target bypass flow is not included in the preset mapping relationship.

[0041] The second judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the opening of the flow regulating valve is increased by the first preset adjustment range for a preset time.

[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 range until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling.

[0043] In one possible implementation, the aforementioned subcooling control device further includes:

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

[0045] In one possible implementation, the first determining module is specifically used to: determine the target bypass flow rate of the refrigerant based on the refrigerant enthalpy at the inlet of the refrigerant pump, the refrigerant flow rate at the inlet of the refrigerant pump, the refrigerant enthalpy at the outlet of the refrigerant pump, and the refrigerant enthalpy at the mixing inlet.

[0046] In one possible implementation, the aforementioned subcooling control device further includes:

[0047] The second determining module is used to determine the refrigerant enthalpy at the inlet based on the aforementioned inlet temperature and inlet pressure.

[0048] The third determining 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 aforementioned fluorine pump.

[0049] The fourth determining module is used to determine the mixing inlet temperature at the mixing inlet of the fluorine pump based on the aforementioned inlet temperature and the preset subcooling.

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

[0051] In one possible implementation, the aforementioned subcooling control device further includes:

[0052] The third judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the opening of the flow regulating valve is opened to the target opening for a preset time.

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

[0054] The second judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the opening of the flow regulating valve is increased by a first preset adjustment range for a preset time.

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

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

[0057] In one possible implementation, the aforementioned subcooling control device further includes:

[0058] The fourth judgment module is used to determine whether the subcooling at the mixing inlet of the refrigerant pump is greater than the second preset subcooling; the second preset subcooling is greater than the first preset subcooling.

[0059] The fourth control module is used to reduce the opening of the flow regulating valve by a second preset adjustment range when the subcooling at the mixing inlet of the fluorine pump is greater than the second preset subcooling.

[0060] The fourth judgment module is further configured to: after the opening of the flow regulating valve is reduced by the second preset adjustment range for a preset time, execute the step of judging whether the subcooling at the mixing inlet of the fluorine pump is greater than the second preset subcooling again, until the subcooling at the mixing inlet is less than or equal to the second preset subcooling.

[0061] Thirdly, embodiments of this application provide a computer storage medium storing a plurality of instructions adapted for a processor to load and execute the steps of the method provided by the first aspect of the embodiments of this application or any possible implementation thereof.

[0062] Fourthly, embodiments of this application provide a refrigeration device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is adapted to be loaded by the processor and execute the steps of the method provided by the first aspect of the embodiments of this application or any possible implementation thereof.

[0063] In this embodiment, when the subcooling at the refrigerant pump inlet is less than a first preset subcooling, the flow regulating valve located in the bypass pipeline is opened to a preset opening degree. The bypass pipeline connects the outlet and inlet of the refrigerant pump. After the flow regulating valve is opened at the preset opening degree for a preset time, it is determined whether the subcooling at the refrigerant pump mixing inlet located between the refrigerant pump and the inlet is greater than or equal to the first preset subcooling. If not, the target bypass flow rate of the refrigerant is determined, and the target opening degree of the flow regulating valve corresponding to the target bypass flow rate is determined according to a preset mapping relationship. The preset mapping relationship includes multiple bypass flow rates and a relationship with the bypass pump. The flow rate is adjusted to the corresponding flow control valve opening. Opening the flow control valve to the target opening introduces high-pressure liquid refrigerant through the bypass pipeline of the refrigerant pump outlet, bypassing it to the refrigerant pump inlet. This pressurizes the refrigerant pump inlet, increases the subcooling, solves the refrigerant pump vaporization and flow interruption phenomenon, ensures stable operation of the refrigerant pump, and balances energy saving. Furthermore, the flow control valve opening corresponding to the bypass flow rate to be adjusted is obtained through a preset mapping relationship. Then, the flow control valve opening set in the bypass pipeline is directly controlled according to the flow control valve opening corresponding to the bypass flow rate to be adjusted, saving subcooling adjustment time and ensuring the reliability of refrigerant pump operation. Attached Figure Description

[0064] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0066] Figure 2 A schematic diagram of another refrigeration system provided as an exemplary embodiment of this application;

[0067] Figure 3A flowchart illustrating a subcooling control method provided for an exemplary embodiment of this application;

[0068] Figure 4 A schematic diagram illustrating the implementation process of a target bypass flow for determining a refrigerant, provided as an exemplary embodiment of this application;

[0069] Figure 5 A schematic flowchart of another subcooling control method provided for an exemplary embodiment of this application;

[0070] Figure 6 A schematic flowchart of another subcooling control method provided for an exemplary embodiment of this application;

[0071] Figure 7 A schematic flowchart of another subcooling control method provided for an exemplary embodiment of this application;

[0072] Figure 8 A schematic diagram illustrating the implementation process of a supercooling control method provided for an exemplary embodiment of this application;

[0073] Figure 9 A schematic diagram of a subcooling control device provided for an exemplary embodiment of this application;

[0074] Figure 10 This is a schematic diagram of the structure of another refrigeration device provided as an exemplary embodiment of this application. Detailed Implementation

[0075] To make the features and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0076] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0077] Data centers are equipped with various data processing devices arranged in rows within the data center, while air conditioning units for cooling the data center are installed between adjacent rows of data processing devices. With the widespread application of 4G and the gradual popularization of 5G, the heat generated by these various data processing devices is increasing, and the requirements for the cooling capacity and energy efficiency of data center air conditioning equipment are also becoming more stringent.

[0078] To meet the cooling needs of data centers and the energy-saving requirements of cooling equipment, refrigerant pumps are typically used as the power source to drive the refrigerant circulation. Please see below. Figure 1 This is a schematic diagram of the structure of a refrigeration device provided in an exemplary embodiment of this application. Figure 1 As shown, the refrigeration equipment may include a refrigerant 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 receiver 180, and a refrigerant pump bypass pipe 190.

[0079] Specifically, the refrigeration equipment includes at least three operating modes based on changes in ambient temperature, including:

[0080] Compressor cooling mode:

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

[0082] When the ambient temperature is high, such as when the outdoor ambient temperature is greater than 20 degrees Celsius, the refrigeration equipment will turn on the compressor refrigeration mode, and the refrigerant pump 110 will stop running.

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

[0084] Fluorine pump cooling mode:

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

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

[0087] The refrigerant pump refrigeration mode works as follows: The refrigerant in evaporator 140 exchanges heat with the air inside the data center, causing the refrigerant to evaporate and absorb heat to lower the air temperature inside the data center. The refrigerant in evaporator 140 evaporates into a higher-temperature gaseous state, which is then transported to condenser 170 via compressor bypass check valve 150. The gaseous refrigerant in condenser 170 exchanges heat with the lower-temperature outdoor air, causing the high-temperature gaseous refrigerant to condense into a low-temperature liquid refrigerant. To match the refrigerant flow rate required by the refrigeration equipment, the low-temperature liquid refrigerant in condenser 170 enters the liquid receiver 180 and is powered by refrigerant pump 110 to be transported to evaporator 140. An electronic expansion valve 130 is installed between refrigerant pump 110 and evaporator 140 for throttling. After absorbing heat in evaporator 140, the refrigerant returns to liquid receiver 180 for recirculation via compressor bypass check valve 150.

[0088] To avoid refrigerant vaporization, which could cause the refrigerant pump 110 to shut off, fail to start, or even be damaged, this embodiment of the application bypasses the high-pressure liquid refrigerant portion at the outlet 112 of the refrigerant pump 110 to the inlet 111 of the refrigerant pump 110 via a newly added flow regulating valve 120. This increases the refrigerant pressure at the inlet 111 of the refrigerant pump 110, thereby increasing the subcooling at the inlet of the refrigerant pump in the refrigeration equipment and solving the problem of refrigerant vaporization and shut-off at the inlet of the refrigerant pump.

[0089] A flow regulating valve 120 is installed in a bypass line, which connects the outlet 112 of the refrigerant pump 110 to its inlet 111. The flow regulating valve 120 is used to adjust the bypass flow rate of the refrigerant pump 110 by controlling its opening when the subcooling at the inlet 111 of the refrigerant pump 110 is less than a first preset subcooling, thereby controlling the subcooling at the inlet 111 of the refrigerant pump 110.

[0090] It should be noted that if the subcooling at the inlet 111 of the refrigerant pump 110 is small, the refrigerant may vaporize and stop flowing at the inlet 111 of the refrigerant pump 110. This can easily lead to the refrigerant pump 110 stopping, failing to start, or even being damaged when the refrigeration equipment is in refrigerant pump refrigeration mode.

[0091] To avoid damage to the refrigerant pump 110, the subcooling at the inlet of the refrigerant pump 110 needs to be controlled within a certain range. Under the premise of ensuring the reliability of the refrigerant pump refrigeration mode, the bypass flow of liquid refrigerant should be minimized, thereby reducing the power of the refrigerant pump.

[0092] Mixed Mode:

[0093] When the ambient temperature is slightly low, for example, when the outdoor ambient temperature is greater than 10 degrees Celsius but less than 20 degrees Celsius, the refrigeration equipment activates the hybrid mode, meaning that the compressor 160 and the refrigerant pump 110 operate simultaneously. In hybrid mode, because the compressor 160 operates at a slower speed due to its inverter operation, compared to the compressor 160 operating at full frequency in compressor cooling mode, the refrigeration equipment achieves energy savings in hybrid mode compared to compressor cooling mode.

[0094] It should be noted that in the mixed mode of the refrigeration equipment, the compressor 160 and the refrigerant pump 110 operate simultaneously. If refrigerant vaporization occurs at the inlet 111 of the refrigerant pump 110, it can easily lead to problems such as flow interruption, inability to start, or even damage to the refrigerant pump 110. Therefore, it is necessary to check the subcooling at the inlet 111 of the refrigerant pump. The subcooling is adjusted to a suitable temperature range by the flow regulating valve 120 to avoid insufficient subcooling at the inlet 111 of the refrigerant pump 110, which could affect the cooling effect or even damage the refrigerant pump.

[0095] Commonly used refrigerants include Freon refrigerants, specifically including R12 refrigerant, R22 refrigerant and 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 regulating valve 120 can be, but is not limited to, a stepper motor. The minimum angular range of rotation of the stepper motor is called a "step," so the adjustment of the opening of the electronic expansion valve 130 and the flow regulating valve 120 is usually calculated in "steps." For example, but not limited to, the opening adjustment range of the flow regulating valve 120 is 120 to 480 steps. When the opening adjustment steps of the flow regulating valve 120 are 480, the opening of the flow regulating valve 120 is at its maximum, that is, the opening of the flow regulating valve 120 reaches its maximum value. In some embodiments, the number of steps for adjusting the opening of different types of electronic expansion valves 130 and flow regulating valves 120 is different, and the types of electronic expansion valves 130 and flow regulating valves 120 can be set according to actual needs; this application does not limit this.

[0097] It should be noted that the refrigerant pump 110 can be, but is not limited to, a centrifugal refrigerant pump. The aforementioned refrigeration equipment can be, but is not limited to, refrigerant pump air conditioners, etc.

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

[0099] It should be understood that Figure 1The number of the refrigerant 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 refrigerant pump bypass pipe 190 is illustrative and can be set according to actual needs. This application does not limit the number of these components.

[0100] Optionally, such as Figure 2 As shown, the refrigeration equipment can also include only the refrigerant pump 110, flow regulating valve 120, electronic expansion valve 130, evaporator 140, compressor bypass pipe 150, compressor 160, condenser 170, and liquid receiver 180. That is, whether to omit these components can be determined based on actual needs. Figure 1 The refrigeration equipment shown has a refrigerant pump bypass pipe 190. For example... Figure 2 As shown, in this embodiment of the application, the high-pressure liquid refrigerant portion of the outlet 112 of the refrigerant pump 110 is also bypassed to the inlet 111 of the refrigerant pump 110 through the newly added flow regulating valve 120. This can increase the refrigerant pressure at the inlet 111 of the refrigerant pump 110 to a certain extent, thereby increasing the subcooling degree at the inlet of the refrigerant pump of the refrigeration equipment and solving the problem of refrigerant vaporization and flow interruption at the inlet of the refrigerant pump.

[0101] It should be noted that, due to Figure 2 The refrigeration equipment shown does not have a refrigerant pump bypass pipe 190. Therefore, the refrigeration equipment does not have a compressor refrigeration mode, but at least a refrigerant pump refrigeration mode and a hybrid refrigeration mode exist.

[0102] Please refer to the following. Figure 3 This is a flowchart illustrating a subcooling control method provided in an exemplary embodiment of this application. Figure 3 As shown, the subcooling control method may include at least:

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

[0104] Specifically, the refrigeration equipment can control the refrigerant flow rate by simultaneously adjusting the opening of the flow regulating valve, thereby controlling the subcooling at the inlet of the refrigerant pump. The flow regulating valve is located in a bypass line, which connects the outlet and inlet of the refrigerant pump. The subcooling at the refrigerant pump inlet refers to the temperature difference between the actual temperature and the saturation temperature of the liquid refrigerant at the pump inlet before the flow regulating valve is opened.

[0105] Specifically, after the refrigeration equipment is turned on in refrigerant pump refrigeration mode or mixed mode, if Figure 1The subcooling at the inlet A of the refrigerant pump shown is less than the first preset subcooling, indicating that the liquid refrigerant at the inlet A may have vaporized during startup and operation. To ensure the cooling effect of the refrigeration equipment and avoid problems such as instability or damage to the refrigerant pump caused by flow interruption, the flow regulating valve of the bypass pipeline connecting the outlet C of the refrigerant pump to the inlet A can be opened to a preset degree. This allows a portion of the liquid refrigerant flowing out of the outlet C of the refrigerant pump to flow back to the inlet A of the refrigerant pump through the flow regulating valve, mix with the refrigerant flowing out of the liquid tank, and then flow to the mixing inlet B of the refrigerant pump. This increases the subcooling at the inlet 111 of the refrigerant pump, ensuring the stable operation of the refrigerant pump in the refrigeration equipment. The aforementioned first preset subcooling is used to characterize the minimum subcooling that can prevent the refrigerant from vaporizing and interrupting flow at the inlet of the refrigerant pump, such as, but not limited to, 4°C. The aforementioned preset opening can be set according to the actual refrigeration situation, such as, but not limited to, 4 steps, 6 steps, etc., and this application embodiment does not limit this.

[0106] Understandably, to avoid excessive adjustment of the subcooling at the inlet of the refrigerant pump, which could lead to excessive subcooling and excessive liquid refrigerant bypass at the inlet of the refrigerant pump, causing excessive power consumption of the refrigerant pump, the above-mentioned preset opening degree should be set within a reasonable range according to the actual situation.

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

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

[0109] S306, if the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, then determine the target bypass flow rate of the refrigerant, and determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to the preset mapping relationship.

[0110] Specifically, after the flow control valve is opened at a preset opening for a preset time, if the subcooling at the refrigerant pump mixing inlet B is still less than the first preset subcooling, in order to improve the subcooling regulation efficiency, the target bypass flow rate of refrigerant required for the subcooling at the refrigerant pump inlet to reach the first preset subcooling after the flow control valve is opened at the preset opening can be determined first. This allows the target opening of the flow control valve corresponding to the target bypass flow rate to be directly determined based on the preset mapping relationship between the bypass flow rate and the flow control valve opening. This avoids the problem of low subcooling control efficiency caused by gradually adjusting the flow control valve opening step by step to adjust the subcooling at the refrigerant pump inlet to be greater than or equal to the first preset subcooling. The aforementioned preset mapping relationship includes multiple bypass flows and the corresponding flow control valve openings for each of the multiple bypass flows.

[0111] Specifically, such as Figure 4 As shown, the 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 at the refrigerant inlet A, the refrigerant flow rate at the refrigerant inlet A, the refrigerant enthalpy at the refrigerant outlet C, and the refrigerant enthalpy at the mixing inlet B.

[0112] Furthermore, such as Figure 4 As shown, before determining the target bypass flow rate of the refrigerant based on the refrigerant enthalpy at the refrigerant pump inlet A, the refrigerant flow rate at the refrigerant pump inlet A, the refrigerant enthalpy at the refrigerant pump outlet C, and the refrigerant enthalpy at the mixing inlet B, the controller of the refrigeration equipment can also detect the liquid refrigerant outlet pressure P2, the refrigerant outlet temperature T2, the inlet pressure P1, the inlet temperature T1, the inlet bypass flow rate Q1 before the flow regulating valve is opened, and the refrigerant inlet pressure Px after the flow regulating valve is opened and mixed. Furthermore, it can also: 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, looking up the refrigerant enthalpy at the refrigerant pump inlet corresponding to (P1, T1) from a table. The refrigerant enthalpy H1 is determined based on the refrigerant outlet temperature T2 and outlet pressure P2 at the refrigerant pump outlet. For example, but not limited to, obtaining the refrigerant enthalpy H2 at the refrigerant pump outlet corresponding to (P2, T2) by looking up a table. The mixing inlet temperature Tx at the refrigerant pump mixing inlet is determined based on the inlet temperature T1 and the preset subcooling Tsc0. For example, but not limited to, Tx = T1 + Tsc0. The refrigerant enthalpy Hx at the mixing inlet is determined based on the mixing inlet temperature Tx and the mixing inlet pressure Px at the mixing inlet. For example, but not limited to, obtaining the refrigerant enthalpy Hx at the refrigerant pump mixing inlet corresponding to (Px, Tx) by looking up a table. The preset subcooling Tsc0 can be, but is not limited to, a first preset subcooling or any value greater than the first preset subcooling and less than the second preset subcooling. This application embodiment does not limit this.

[0113] Based on the fact that the enthalpy values ​​before and after mixing are equal, we can derive: H1×Q1+H2×q2=Hx(Q1+q2), which gives the target bypass flow rate of the refrigerant q2=(H1-Hx)×Q1 / (Hx-H2).

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

[0115] S308, open the flow regulating valve to the target opening degree.

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

[0117] In this embodiment, when the subcooling at the refrigerant pump inlet is less than a first preset subcooling, the flow regulating valve located in the bypass pipeline is opened to a preset opening degree. The bypass pipeline connects the outlet and inlet of the refrigerant pump. After the flow regulating valve is opened at the preset opening degree for a preset time, it is determined whether the subcooling at the refrigerant pump mixing inlet located between the refrigerant pump and the inlet is greater than or equal to the first preset subcooling. If not, the target bypass flow rate of the refrigerant is determined, and the target opening degree of the flow regulating valve corresponding to the target bypass flow rate is determined according to a preset mapping relationship. The preset mapping relationship includes multiple bypass flow rates and a relationship with the bypass flow rate. The flow control valve opening is corresponding to the quantity; opening the flow control valve to the target opening allows high-pressure liquid refrigerant to be introduced into the refrigerant pump outlet bypass pipeline, which then bypasses to the refrigerant pump inlet through the flow control valve. This pressurizes the refrigerant pump inlet, increases the subcooling, solves the refrigerant pump vaporization interruption phenomenon, ensures stable operation of the refrigerant pump, and balances energy saving. Furthermore, the flow control valve opening corresponding to the bypass flow to be adjusted is obtained through a preset mapping relationship. Then, the flow control valve opening set in the bypass pipeline is directly controlled according to the flow control valve opening corresponding to the bypass flow to be adjusted, saving subcooling adjustment time and ensuring the reliability of refrigerant pump operation.

[0118] Please refer to the following. Figure 5 This is a flowchart illustrating another subcooling control method provided in an exemplary embodiment of this application. Figure 5 As shown, the subcooling control method includes:

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

[0120] Specifically, S502 is the same as S302, and will not be repeated here.

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

[0122] Specifically, S504 is the same as S304, and will not be repeated here.

[0123] S506, if the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, then determine the target bypass flow rate of the refrigerant.

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

[0125] S508, determine whether the preset mapping relationship contains the target bypass traffic.

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

[0127] S510, if the preset mapping relationship includes the target bypass flow, then determine the target opening degree of the flow regulating valve corresponding to the target bypass flow according to the preset mapping relationship.

[0128] Specifically, the process of determining the target opening degree of the flow regulating valve corresponding to the target bypass flow rate in S510 and S306 according to the preset mapping relationship is the same, and will not be repeated here.

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

[0130] Specifically, S512 is the same as S308, and will not be repeated here.

[0131] Please continue to refer to the following. 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 target bypass flow is not included in the preset mapping relationship, the opening of the flow regulating valve is increased by the first preset adjustment range.

[0133] Specifically, the aforementioned first preset adjustment range can be, but is not limited to, one step, two steps, etc. If the preset mapping relationship does not include the target bypass flow, the opening of the flow regulating valve can be increased by the first preset adjustment range first, that is, the flow regulating valve can be increased from the preset opening to the first preset adjustment range.

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

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

[0136] Please continue to refer to the following. Figure 5 ,like Figure 5 As shown in S516, after the opening of the flow regulating valve increases by a first preset adjustment range for a preset time, and after determining whether the subcooling at the mixing inlet of the refrigerant pump is greater than or equal to the first preset subcooling, the subcooling control method further includes:

[0137] S518, if the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling, then maintain the current opening degree and update the preset mapping relationship according to the current opening degree and the target bypass flow rate.

[0138] Specifically, the current opening An = preset opening A + first preset adjustment range a × number of times n is adjusted with the first preset adjustment range. If the subcooling at the mixing inlet of the refrigerant pump is greater than or equal to the first preset subcooling, 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. This allows for timely and efficient realization of the preset mapping relationship between the opening of the flow control valve and the target bypass flow required at the refrigerant pump inlet after the flow control valve is opened to the preset opening. This ensures 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 target bypass flow based on the updated preset mapping relationship.

[0139] Please refer to the following. Figure 6 This is a flowchart illustrating another subcooling control method provided in an exemplary embodiment of this application. Figure 6 As shown, the subcooling control method includes:

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

[0141] Specifically, S602 is the same as S302, and will not be repeated here.

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

[0143] Specifically, S604 is the same as S304, and will not be repeated here.

[0144] S606, if the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, then determine the target bypass flow rate of the refrigerant, and determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to the preset mapping relationship.

[0145] Specifically, S606 is the same as S306, which will not be repeated here.

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

[0147] Specifically, S608 is identical to S308, which will not be repeated here.

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

[0149] Specifically, after the flow regulating valve has been opened to the target opening for a preset time, in order to further ensure the stability and reliability of the operation of the fluorine pump, it can be determined again whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling, thereby further determining whether the subcooling at the mixing inlet of the fluorine pump has met the subcooling requirement (the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling).

[0150] S612, if the subcooling at the mixing inlet of the fluorine pump is less than the first preset subcooling, the opening of the flow regulating valve is increased by the first preset adjustment range.

[0151] Specifically, after the flow control valve has been open at the target opening for a preset time, if the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, the opening of the flow control valve can be finely adjusted again by the first preset adjustment range. The aforementioned first preset adjustment range is less than the target opening.

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

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

[0154] S616 If the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling, then maintain the current opening degree and update the preset mapping relationship according to the current opening degree and the target bypass flow rate.

[0155] Specifically, the current opening degree Bn = target opening degree B + first preset adjustment range a × number of adjustments n based on the first preset adjustment range. If the subcooling at the mixing inlet of the refrigerant pump is greater than or equal to the first preset subcooling degree, the flow control valve can be controlled to maintain its current opening degree. The preset mapping relationship is then updated based on the current opening degree and the target bypass flow rate. This further updates the flow control valve opening degree corresponding to the target bypass flow rate required at the refrigerant pump inlet after the flow control valve is opened to the preset opening degree. This improves the accuracy of the flow control valve opening degree corresponding to the bypass flow rate in the preset mapping relationship. Consequently, when encountering the same target bypass flow rate later, the flow control valve can be directly adjusted to the current opening degree corresponding to the target bypass flow rate based on a more accurate preset mapping relationship, further improving the efficiency and accuracy of subcooling control.

[0156] Please refer to the following. Figure 7 This is a flowchart illustrating another subcooling control method provided in an exemplary embodiment of this application. Figure 7 As shown, the subcooling control method includes:

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

[0158] Specifically, S702 is the same as S302, and will not be repeated here.

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

[0160] Specifically, S704 is the same as S304, and will not be repeated here.

[0161] S706, if not, determine the target bypass flow rate of the refrigerant and determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to the preset mapping relationship.

[0162] Specifically, S706 is the same as S306, which will not be repeated here.

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

[0164] Specifically, S708 is identical to S308, which will not be repeated here.

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

[0166] Specifically, to avoid excessive subcooling at the refrigerant pump mixing inlet, which would increase the pump's power and thus the refrigeration equipment's energy consumption, after opening the flow regulating valve to the target opening degree, it can be further determined whether the subcooling at the refrigerant pump mixing inlet is greater than a second preset subcooling degree. This second preset subcooling degree being greater than the first preset subcooling degree can be, but is not limited to, 6°C, etc.

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

[0168] Specifically, when the subcooling at the mixing inlet of the refrigerant pump is greater than the second preset subcooling, it indicates that the subcooling at the mixing inlet of the refrigerant pump is too large. In this case, the opening of the flow regulating valve will be reduced by the second preset adjustment range to reduce the subcooling at the mixing inlet of the refrigerant pump. The aforementioned second preset adjustment range may be the same as or different from the first preset adjustment range, and this application embodiment does not limit this.

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

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

[0171] Please refer to the following. Figure 8 This is a schematic diagram illustrating the implementation process of a supercooling control method provided in an exemplary embodiment of this application. Figure 8As shown, after the refrigeration equipment is turned on in refrigerant pump refrigeration mode or mixed refrigeration mode, the inlet temperature and inlet pressure at the refrigerant pump inlet can be detected first, and the subcooling at the refrigerant pump inlet can be determined based on the inlet temperature. If the subcooling at the refrigerant pump inlet is less than the first preset subcooling, it indicates that the refrigerant pump refrigeration effect is poor, which may be due to the vaporization of liquid refrigerant at the inlet, causing cavitation, flow interruption, unstable operation of the refrigeration system, or even damage to the refrigerant pump. In this case, the flow regulating valve corresponding to the refrigerant pump can be opened to the preset opening degree, and the subcooling at the refrigerant pump inlet (mixed inlet) can be controlled within the range of 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. This involves introducing high-pressure liquid refrigerant through the refrigerant pump outlet bypass pipeline and bypassing it to the refrigerant pump inlet through the flow regulating valve, thereby pressurizing the refrigerant pump inlet, increasing the subcooling, solving the refrigerant pump vaporization and flow interruption phenomenon, and stabilizing the refrigerant pump. This system ensures stable operation and energy conservation. It can also obtain the opening degree of the flow regulating valve corresponding to the bypass flow rate to be adjusted through a preset mapping relationship. This allows for direct control of the flow regulating valve opening in the bypass pipeline based on the required bypass flow rate, saving time on subcooling adjustment and ensuring the reliability of the refrigerant pump. Furthermore, it can efficiently and promptly establish a preset mapping relationship between the flow regulating valve opening and the target bypass flow rate required at the refrigerant pump inlet after the flow regulating valve is opened to the preset opening. This allows for direct adjustment of the flow regulating valve to the current opening corresponding to the target bypass flow rate when encountering the same target bypass flow rate in the future, based on the updated preset mapping relationship. Additionally, it controls the refrigerant pump power by controlling the subcooling at the refrigerant pump mixing inlet, avoiding excessive energy consumption of the refrigeration equipment.

[0172] Please refer to the following. Figure 9 This is a schematic diagram of a subcooling control device provided in an exemplary embodiment of this application. Figure 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 degree when the subcooling degree at the inlet of the fluorine pump is less than the first preset subcooling degree; the flow regulating valve is provided in the bypass pipeline, and the bypass pipeline is used to connect the outlet and inlet of the fluorine pump.

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

[0175] The first determining module 930 is used to determine the target bypass flow rate of the refrigerant if the determination module determines that the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, and to determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to a preset mapping relationship; the preset mapping relationship includes multiple bypass flow rates and the opening degree of the flow regulating valve corresponding to the bypass flow rate.

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

[0177] In one possible implementation, the aforementioned subcooling control device 900 further includes:

[0178] The third control module is used to increase the opening of the flow regulating valve by a first preset adjustment range if the target bypass flow is not included in the preset mapping relationship.

[0179] The second judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the opening of the flow regulating valve is increased by the first preset adjustment range for a preset time.

[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 range until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling.

[0181] In one possible implementation, the aforementioned subcooling control device 900 further includes:

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

[0183] In one possible implementation, the first determining module 930 is specifically used to: determine the target bypass flow rate of the refrigerant based on the refrigerant enthalpy at the inlet of the refrigerant pump, the refrigerant flow rate at the inlet of the refrigerant pump, the refrigerant enthalpy at the outlet of the refrigerant pump, and the refrigerant enthalpy at the mixing inlet.

[0184] In one possible implementation, the aforementioned subcooling control device 900 further includes:

[0185] The second determining module is used to determine the refrigerant enthalpy at the inlet based on the aforementioned inlet temperature and inlet pressure.

[0186] The third determining 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 aforementioned fluorine pump.

[0187] The fourth determining module is used to determine the mixing inlet temperature at the mixing inlet of the fluorine pump based on the aforementioned inlet temperature and the preset subcooling.

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

[0189] In one possible implementation, the aforementioned subcooling control device 900 further includes:

[0190] The third judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the opening of the flow regulating valve is opened to the target opening for a preset time.

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

[0192] The second judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the opening of the flow regulating valve is increased by a first preset adjustment range for a preset time.

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

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

[0195] In one possible implementation, the aforementioned subcooling control device 900 further includes:

[0196] The fourth judgment module is used to determine whether the subcooling at the mixing inlet of the refrigerant pump is greater than the second preset subcooling; the second preset subcooling is greater than the first preset subcooling.

[0197] The fourth control module is used to reduce the opening of the flow regulating valve by a second preset adjustment range when the subcooling at the mixing inlet of the fluorine pump is greater than the second preset subcooling.

[0198] The fourth judgment module is further configured to: after the opening of the flow regulating valve is reduced by the second preset adjustment range for a preset time, execute the step of judging whether the subcooling at the mixing inlet of the fluorine pump is greater than the second preset subcooling again, until the subcooling at the mixing inlet is less than or equal to the second preset subcooling.

[0199] The division of modules in the above-described subcooling control device is for illustrative purposes only. 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 subcooling control device. The implementation of each module in the subcooling control device provided in the embodiments of this specification can be in the form of a computer program. This computer program can run on the refrigeration equipment. The program modules constituted by this computer program can be stored in the memory of the refrigeration equipment. When the computer program is executed by a processor, it implements all or part of the steps of the subcooling control method described in the embodiments of this specification.

[0200] This application also provides a computer storage medium that can store multiple instructions adapted for loading by a processor and executing the steps of any of the methods described in the above embodiments.

[0201] Please see below. Figure 10 This is a structural schematic diagram of a refrigeration device provided in an embodiment of this application. Figure 10 As shown, the refrigeration device 1000 may include: at least one processor 1010, at least one network interface 1040, user interface 1030, memory 1050, and at least one communication bus 1020.

[0202] The communication bus 1020 is used to enable communication between these components.

[0203] The user interface 1030 may include a display screen and a camera. Optionally, the 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] The cooling device processor 1010 may include one or more processing cores. The cooling device processor 1010 connects to various parts within the cooling device 1000 using various interfaces and lines. It executes various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 1050, and by calling data stored in the memory 1050. Optionally, the cooling device processor 1010 may be implemented using at least one of the following hardware forms: Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The cooling device processor 1010 may integrate one or more of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and Modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content to be displayed on the screen; and the modem handles wireless communication. It is understandable that the aforementioned modem may not be integrated into the cooling device processor 1010, but may be implemented using a separate chip.

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

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

[0208] If the subcooling at the refrigerant pump inlet is less than a first preset subcooling, the flow control valve is opened to a preset opening degree. The flow control valve is located in a bypass line connecting the outlet and inlet of the refrigerant pump. After the flow control valve is opened at the preset opening degree for a preset time, it is determined whether the subcooling at the refrigerant pump mixing inlet is greater than or equal to the first preset subcooling. The mixing inlet is located between the refrigerant pump and the inlet. If not, the target bypass flow rate of the refrigerant is determined, and the target opening degree of the flow control valve corresponding to the target bypass flow rate is determined according to a preset mapping relationship. The preset mapping relationship includes multiple bypass flow rates and the opening degrees of the flow control valves corresponding to the bypass flow rates. The flow control valve is then opened to the target opening degree.

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

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

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

[0212] Maintain the current opening and update the preset mapping relationship based on the current opening and the target bypass flow.

[0213] In some possible embodiments, when the processor 1010 performs the above-described determination of the target bypass flow rate of the refrigerant, it is specifically configured to perform: determining the target bypass flow rate of the refrigerant based on the refrigerant enthalpy at the inlet of the refrigerant pump, the refrigerant flow rate at the inlet of the refrigerant pump, the refrigerant enthalpy at the outlet of the refrigerant pump, and the refrigerant enthalpy at the mixing inlet.

[0214] In some possible embodiments, before performing the above-described determination of the target bypass flow rate of the refrigerant based on the refrigerant enthalpy at the refrigerant pump inlet, the refrigerant flow rate at the refrigerant pump inlet, the refrigerant enthalpy at the refrigerant pump outlet, and the refrigerant enthalpy at the mixing inlet, the processor 1010 is further configured to perform:

[0215] The refrigerant enthalpy at the inlet is determined based on the inlet temperature and inlet pressure; the refrigerant enthalpy at the outlet is determined based on the refrigerant outlet temperature and outlet pressure at the outlet of the refrigerant pump; the mixing inlet temperature at the mixing inlet of the refrigerant pump is determined based on the inlet temperature and the preset subcooling; and the refrigerant enthalpy at the mixing inlet is determined based on the mixing inlet temperature and the mixing inlet pressure at the mixing inlet of the refrigerant pump.

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

[0217] After the flow regulating valve is opened to the target opening for a preset time, it is determined whether the subcooling at the refrigerant pump mixing inlet is greater than or equal to the first preset subcooling. If not, the opening of the flow regulating valve is increased by the first preset adjustment range. After the opening of the flow regulating valve is increased by the first preset adjustment range for a preset time, it is determined whether the subcooling at the refrigerant pump mixing inlet is greater than or equal to the first preset subcooling. If not, the step of increasing the opening of the flow regulating valve by the first preset adjustment range is executed again until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling. The current opening is maintained, and the preset mapping relationship is updated according to the current opening and the target bypass flow rate.

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

[0219] Determine whether the subcooling at the mixing inlet of the refrigerant pump is greater than a second preset subcooling; the second preset subcooling is greater than the first preset subcooling; when the subcooling at the mixing inlet of the refrigerant pump is greater than the second preset subcooling, reduce 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 range for a preset time, repeat the step of determining whether the subcooling at the mixing inlet of the refrigerant pump is greater than the second preset subcooling, until the subcooling at the mixing inlet is less than or equal to the second preset subcooling.

[0220] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0221] The modules described as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0222] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When these computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this specification are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted through a computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The aforementioned available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., Digital Versatile Discs (DVDs)), or semiconductor media (e.g., Solid State Disks (SSDs)).

[0223] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0224] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0225] The above is a description of a subcooling control method, apparatus, storage medium, and refrigeration equipment provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for controlling subcooling, characterized in that, The method includes: If the subcooling at the inlet of the fluorine pump is less than the first preset subcooling, the flow regulating valve is opened to the preset opening degree; the flow regulating valve is installed in the bypass pipeline, which is used to connect the outlet and inlet of the fluorine pump; After the flow regulating valve is opened at the preset opening degree for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling degree; the mixing inlet is located between the fluorine pump and the inlet, and is the mixing point where the flow regulating valve and the liquid storage tank are connected to the fluorine pump inlet; If not, then determine the target bypass flow rate of the refrigerant, and determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to the preset mapping relationship; the preset mapping relationship includes multiple bypass flow rates and the opening degree of the flow regulating valve corresponding to the bypass flow rate; Open the flow regulating valve to the target opening degree; 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 at the inlet of the fluorine pump, the refrigerant flow rate at the inlet of the fluorine pump, the refrigerant enthalpy at the outlet of the fluorine pump, and the refrigerant enthalpy at the mixing inlet.

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 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 range; After the opening of the flow regulating valve is increased by the first preset adjustment range for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling. If not, then the step of increasing the opening of the flow regulating valve by the first preset adjustment range is performed again until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling.

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

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

5. The method according to any one of claims 1-4, characterized in that, After opening the flow regulating valve to the target opening degree, the method further includes: After the flow regulating valve has been open to the target opening for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling. If not, the opening of the flow regulating valve is increased by the first preset adjustment range; After the opening of the flow regulating valve is increased by a first preset adjustment range for a preset time, it is determined whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling. If not, then the step of increasing the opening of the flow regulating valve by the first preset adjustment range is performed again until the subcooling at the mixing inlet is greater than or equal to the first preset subcooling. Maintain the current opening degree and update the preset mapping relationship based on the current opening degree and the target bypass flow.

6. The method according to any one of claims 1-4, characterized in that, After opening the flow regulating valve to the target opening degree, the method further includes: Determine whether the subcooling at the mixing inlet of the refrigerant pump is greater than a second preset subcooling; the second preset subcooling is greater than the first preset subcooling. When the subcooling at the mixing inlet of the fluorine pump is greater than the second preset subcooling, the opening of the flow regulating valve is reduced by the second preset adjustment range; After the opening of the flow regulating valve is reduced by the second preset adjustment range for a preset time, the step of determining whether the subcooling at the mixing inlet of the fluorine pump is greater than the second preset subcooling is executed again until the subcooling at the mixing inlet is less than or equal to the second preset subcooling.

7. A subcooling control device, characterized in that, The device includes: The first control module is used to open the flow regulating valve to a preset opening degree when the subcooling degree at the inlet of the fluorine pump is less than the first preset subcooling degree; the flow regulating valve is set in the bypass pipeline, and the bypass pipeline is used to connect the outlet and inlet of the fluorine pump; The first judgment module is used to determine whether the subcooling at the mixing inlet of the fluorine pump is greater than or equal to the first preset subcooling after the flow regulating valve is opened at the preset opening degree for a preset time; the mixing inlet is located between the fluorine pump and the inlet, and is the mixing point where the flow regulating valve and the liquid storage tank are connected to the fluorine pump inlet; The first determining module is configured to determine the target bypass flow rate of the refrigerant if the determining module determines that the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, and to determine the target opening degree of the flow regulating valve corresponding to the target bypass flow rate according to a preset mapping relationship; the preset mapping relationship includes multiple bypass flow rates and the opening degree of the flow regulating valve corresponding to the bypass flow rate; The second control module is used to open the flow regulating valve to the target opening degree; Wherein, the first determining module is used for: If the determination module determines that the subcooling at the mixing inlet of the refrigerant pump is less than the first preset subcooling, then the target bypass flow rate of the refrigerant is determined based on the refrigerant enthalpy at the refrigerant pump inlet, the refrigerant flow rate at the refrigerant pump inlet, the refrigerant enthalpy at the refrigerant pump outlet, and the refrigerant enthalpy at the mixing inlet.

8. A computer storage medium, characterized in that, The computer storage medium stores a plurality of instructions adapted for loading by a processor and executing the steps of the method as claimed in any one of claims 1 to 6.

9. A refrigeration device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the method as described in any one of claims 1 to 6.

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