Control method of fluorine pump double circulation energy storage liquid cooling system and related device

Abstract

The application provides a control method and related device of a fluorine pump double-cycle energy storage liquid cooling system. The method comprises the following steps: acquiring an outdoor temperature; if the outdoor temperature is greater than a first ambient temperature threshold and not greater than a second ambient temperature threshold, acquiring an actual refrigerant temperature and a target refrigerant temperature of a cold water unit of the energy storage liquid cooling system; the first ambient temperature threshold is less than the second ambient temperature threshold; subtracting the target refrigerant temperature from the actual refrigerant temperature of the cold water unit to obtain a difference value; and according to the difference value, controlling the energy storage liquid cooling system to operate in a fluorine pump refrigeration working condition or a compressor refrigeration working condition. The above method can prolong the operation time of the fluorine pump refrigeration working condition on the basis of ensuring the refrigeration capacity of the system, thereby improving the energy efficiency ratio of the system and improving the energy saving effect of the energy storage liquid cooling system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling systems, and particularly relates to a control method of a fluorine pump double-circulation energy storage liquid cooling system and a related device. BACKGROUND

[0002] As the most important energy consumption in the PUE calculation of a data center, the refrigeration equipment is an urgent target for energy saving. How to better utilize the natural cold source has become the main direction of energy saving.

[0003] In order to improve the energy saving effect, in the related technology, the liquid cooling system is usually provided with two modes of compressor refrigeration and fluorine pump refrigeration, the compressor refrigeration is used when the air temperature is high, the fluorine pump refrigeration is used when the air temperature is low, and the compressor and the fluorine pump refrigeration are started at the same time when the air temperature is in the middle range. In the actual operation process, the fluorine pump refrigeration can only be used alone below 5 DEG C, and the compressor refrigeration needs to be used partially or entirely in other cases, and the energy saving effect is not good. SUMMARY

[0004] Therefore, the present application provides a control method of a fluorine pump double-circulation energy storage liquid cooling system and a related device, which can solve the problem of poor energy saving effect of the energy storage liquid cooling system.

[0005] In a first aspect, an embodiment of the present application provides a control method of a fluorine pump double-circulation energy storage liquid cooling system, comprising:

[0006] obtaining an outdoor temperature;

[0007] if the outdoor temperature is greater than a first ambient temperature threshold and is not greater than a second ambient temperature threshold, obtaining an actual temperature of refrigerant of a cold water unit of the energy storage liquid cooling system and a target temperature of the refrigerant; the first ambient temperature threshold is less than the second ambient temperature threshold;

[0008] subtracting the target temperature of the refrigerant from the actual temperature of the refrigerant of the cold water unit to obtain a difference value;

[0009] controlling the energy storage liquid cooling system to run in a fluorine pump refrigeration working condition or a compressor refrigeration working condition according to the difference value.

[0010] In a second aspect, an embodiment of the present application provides a control device of a fluorine pump double-circulation energy storage liquid cooling system, comprising:

[0011] an outdoor temperature obtaining module, configured to obtain an outdoor temperature;

[0012] The secondary side water outlet temperature acquisition module is configured to acquire the actual temperature and the target temperature of the refrigerant of the cold water unit of the energy storage liquid cooling system if the outdoor temperature is greater than a first ambient temperature threshold and is not greater than a second ambient temperature threshold, the first ambient temperature threshold being less than the second ambient temperature threshold;

[0013] The difference calculation module is configured to subtract the target temperature of the refrigerant of the cold water unit from the actual temperature of the refrigerant to obtain a difference value.

[0014] The operating condition determination module is configured to control the energy storage liquid cooling system to operate in a fluorine pump refrigeration operating condition or a compressor refrigeration operating condition according to the difference value.

[0015] In a third aspect, an embodiment of the present application provides an energy storage liquid cooling system with fluorine pump double circulation, comprising a refrigeration unit, a cold water unit and a controller configured to execute the control method of the energy storage liquid cooling system with fluorine pump double circulation.

[0016] The refrigeration unit comprises a fluorine pump and a compressor, and the cold water unit comprises a plate heat exchanger.

[0017] The refrigeration unit generates cold energy through the fluorine pump or the compressor.

[0018] The cold water unit exchanges heat with the refrigeration unit through the plate heat exchanger.

[0019] In one possible implementation, the refrigeration unit further comprises a condenser, a liquid storage tank, a first one-way valve, a second one-way valve and a throttling component.

[0020] The first end of the compressor is connected to the first end of the primary side of the plate heat exchanger, the second end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid storage tank, the second end of the liquid storage tank is connected to the first end of the fluorine pump, the second end of the fluorine pump is connected to the first end of the throttling component, and the second end of the throttling component is connected to the second end of the primary side of the plate heat exchanger.

[0021] The positive electrode of the first one-way valve is connected to the first end of the compressor, and the negative electrode of the first one-way valve is connected to the second end of the compressor.

[0022] The positive electrode of the second one-way valve is connected to the first end of the liquid storage tank, and the negative electrode of the second one-way valve is connected to the second end of the fluorine pump.

[0023] In one possible implementation, the cold water unit further comprises an external circulation water pump, a first automatic exhaust valve, a second automatic exhaust valve, a terminal water distributor and a terminal water collector.

[0024] The first end of the outer circulating water pump is connected to the first end of the secondary side of the plate heat exchanger, the second end of the outer circulating water pump is communicated with the terminal water distributor, the second end of the secondary side of the plate heat exchanger is communicated with the terminal water collector, a first automatic exhaust valve is arranged on the pipeline of the outer circulating water pump and the terminal water distributor, and the second automatic exhaust valve is arranged on the pipeline of the terminal water collector and the plate heat exchanger.

[0025] Compared with the prior art, the embodiment of the present application has the following beneficial effects:

[0026] When the outdoor temperature is greater than the first environmental temperature threshold and is not greater than the second environmental temperature threshold, the actual temperature and the target temperature of the refrigerant of the cold water unit of the energy storage liquid cooling system are obtained, the actual temperature of the refrigerant of the cold water unit is subtracted from the target temperature of the refrigerant to obtain a difference value, and finally, the energy storage liquid cooling system is controlled to operate in a fluorine pump refrigeration condition or a compressor refrigeration condition according to the difference value. The above method can determine the load size based on the difference between the actual temperature and the target temperature of the refrigerant of the cold water unit of the energy storage liquid cooling system in the spring and autumn transition season, control the system to operate in the fluorine pump refrigeration condition in a low load state, and control the system to operate in the compressor refrigeration condition in a high load state, thereby increasing the operation time of the fluorine pump refrigeration condition and reducing the operation time of the compressor refrigeration condition on the basis of ensuring the refrigeration capacity of the system, improving the energy efficiency ratio of the system, and improving the energy saving effect of the energy storage liquid cooling system. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 is a structural schematic diagram of the energy storage liquid cooling system with fluorine pump double circulation provided by the embodiment of the present application;

[0029] Figure 2 is an implementation flowchart of the control method of the energy storage liquid cooling system with fluorine pump double circulation provided by the embodiment of the present application;

[0030] Figure 3 is a specific implementation flowchart of the control method of the energy storage liquid cooling system with fluorine pump double circulation provided by the embodiment of the present application;

[0031] Figure 4 is a structural schematic diagram of the control device of the energy storage liquid cooling system with fluorine pump double circulation provided by the embodiment of the present application;

[0032] Figure 5is a schematic diagram of a controller provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the structure of the fluorine pump double-circulation energy storage liquid cooling system provided by the embodiment of the present invention. Figure 1 As shown, the system includes a refrigeration unit, a chilled water unit and a controller;

[0036] The refrigeration unit includes a fluorine pump 14 and a compressor 11; the cold water unit includes a plate heat exchanger 25;

[0037] The refrigeration unit generates cold energy through a fluorine pump 14 or a compressor 11;

[0038] The cold water unit exchanges heat with the refrigeration unit through the plate heat exchanger 25 .

[0039] like Figure 1 As shown, in a possible embodiment, the refrigeration unit further includes a condenser 12, a liquid storage tank 13, a first one-way valve 16, a second one-way valve 17 and a throttling component 15;

[0040] The first end of the compressor 11 is connected to the first end of the primary side of the plate heat exchanger 25, the second end of the compressor 11 is connected to the first end of the condenser 12, the second end of the condenser 12 is connected to the first end of the liquid storage tank 13, the second end of the liquid storage tank 13 is connected to the first end of the fluorine pump 14, the second end of the fluorine pump 14 is connected to the first end of the throttling component 15, and the second end of the throttling component 15 is connected to the second end of the primary side of the plate heat exchanger 25;

[0041] The positive electrode of the first one-way valve 16 is connected to the first end of the compressor 11, and the negative electrode of the first one-way valve 16 is connected to the second end of the compressor 11;

[0042] The positive electrode of the second one-way valve 17 is connected to the first end of the liquid storage tank 13 , and the negative electrode of the second one-way valve 17 is connected to the second end of the fluorine pump 14 .

[0043] In one possible implementation, as shown in Figure 1 The cold water unit further comprises an outer circulating water pump 27, a first automatic exhaust valve 232, a second automatic exhaust valve 231, a terminal water distributor 212 and a terminal water collector 211.

[0044] The first end of the outer circulating water pump 27 is connected to the first end of the secondary side of the plate heat exchanger, the second end of the outer circulating water pump 27 is connected to the terminal water distributor 212, the second end of the secondary side of the plate heat exchanger is connected to the terminal water collector 211, and the first automatic exhaust valve 232 is arranged on the pipeline between the outer circulating water pump 27 and the terminal water distributor 212, and the second automatic exhaust valve 231 is arranged on the pipeline between the terminal water collector 211 and the plate heat exchanger.

[0045] Specifically, as shown in Figure 1 The entire energy storage liquid cooling system is formed by thermal coupling of a primary side refrigeration unit and a secondary side cold water unit. The primary side is the refrigeration unit, which comprises a compressor 11, a condenser 12, a fluorine pump 14, a liquid storage tank 13, a first one-way valve 16, a second one-way valve 17, a throttling component 15 and a plate heat exchanger 25. The secondary side is the cold water unit, which comprises the plate heat exchanger 25, the outer circulating water pump 27, the first automatic exhaust valve 232, the second automatic exhaust valve 231, temperature sensors (222, 221), pressure sensors (241, 242), filters, valves, the terminal water distributor 212 and the terminal water collector 211, etc. The primary side refrigeration unit exchanges heat through the plate heat exchanger 25 to provide cold energy to the secondary side, and the secondary side cold water unit provides refrigerant for the cold plate under the energy storage system battery. The flowing medium in the primary side refrigeration unit is refrigerant, and the flowing medium in the secondary side cold water unit is antifreeze (50% glycol solution). The primary side and the secondary side counterflow in the plate heat exchanger 25 to complete heat conduction. The system is refrigerated by the primary side refrigeration unit, and the cold energy is transferred to the secondary side through the plate heat exchanger 25. The secondary side refrigerant is cooled by the plate heat exchanger 25, and then flows into the cold plate under each battery through the terminal water distributor 212 to cool the battery, and then flows back to the terminal water collector 211, and then flows through the plate heat exchanger 25 to complete the circulation. The compressor 11 and the fluorine pump 14 in the primary side are respectively connected in parallel with the one-way valve, which is used to control the switching of the refrigerant flow direction in the pipeline when different operating conditions are switched. The automatic exhaust valve, the temperature sensor, the pressure sensor and the expansion tank are connected in series in the secondary side, which is used to obtain parameters and control the secondary side system and stabilize the pipeline state.

[0046] Referring to Figure 2 , which shows an implementation flowchart of the control method of the energy storage liquid cooling system with fluorine pump double circulation provided by the embodiment of the present application, which is described in detail as follows:

[0047] S101: Obtain an outdoor temperature.

[0048] The execution subject of the embodiment is a controller of the energy storage liquid cooling system. Specifically, referring to Figure 2 and Figure 3 , the controller obtains an outdoor temperature Te in real time, and controls the energy storage liquid cooling system to operate in a fluorine pump refrigeration working condition if the outdoor temperature Te is not greater than a first environmental temperature threshold B. The controller controls the energy storage liquid cooling system to operate in a compressor refrigeration working condition if the outdoor temperature Te is greater than a second environmental temperature threshold C.

[0049] Specifically, the first environmental temperature threshold is a threshold for judging an autumn and winter season scenario, and the second environmental temperature threshold is a threshold for judging a summer season scenario. When the outdoor temperature Te is not greater than the first environmental temperature threshold B, it is determined that the autumn and winter low-temperature scenario is present, and thus the controller can control the energy storage liquid cooling system to enter the fluorine pump refrigeration working condition and control the compressor to be prohibited from operating. The energy storage liquid cooling system completely utilizes a natural cold source for refrigeration, thereby reducing the energy consumption of the system. In addition, the energy storage is performed at night or even in the early morning of the autumn and winter season, when the electricity cost is at a trough, and the outdoor temperature at night is lower. The energy consumption of the liquid cooling system can also be greatly reduced, thereby greatly saving the energy consumption compared with the conventional summer season scenario. When the outdoor temperature Te is greater than the second environmental temperature threshold C, it is determined that the summer high-temperature scenario is present, and the controller can control the energy storage liquid cooling system to enter the compressor refrigeration working condition.

[0050] Exemplarily, the first environmental temperature threshold can be 5℃, and the second environmental temperature threshold can be 25℃.

[0051] S102: If the outdoor temperature is greater than a first environmental temperature threshold and not greater than a second environmental temperature threshold, obtain an actual refrigerant temperature and a target refrigerant temperature of a chilled water unit of the energy storage liquid cooling system. The first environmental temperature threshold is less than the second environmental temperature threshold.

[0052] In the embodiment, referring to Figure 3 , if it is monitored that the outdoor temperature Te is greater than the first environmental temperature threshold B and not greater than the second environmental temperature threshold C, it is determined that the transition season is present. At this time, the refrigeration capacity of the fluorine pump mode has a certain attenuation and cannot reach 100% rated refrigeration capacity. Therefore, the controller can infer the current refrigeration capacity and load capacity of the liquid cooling system according to a difference between the actual refrigerant temperature Tx of the chilled water unit and the target refrigerant temperature Ts, and control the energy storage liquid cooling system to operate in the fluorine pump refrigeration working condition when the current refrigeration capacity is greater than the load capacity, and control the energy storage liquid cooling system to operate in the compressor refrigeration working condition when the current refrigeration capacity is less than the load capacity. In this way, the working time of the fluorine pump refrigeration working condition is prolonged, the working time of the compressor refrigeration working condition is reduced, and the energy saving effect of the system is improved.

[0053] Specifically, the actual temperature of the refrigerant of the cold water unit can be the actual temperature of the refrigerant at the secondary side water outlet and the actual temperature of the refrigerant at the secondary side return water outlet. Preferably, since the secondary side water outlet is located at the output end of the energy storage liquid cooling system, the actual temperature of the refrigerant at the secondary side water outlet is detected to track the size change of the refrigeration capacity and the load more accurately and quickly, so as to improve the control accuracy of the energy storage liquid cooling system, reduce the calculation amount, and improve the control efficiency of the system.

[0054] S103: subtracting the actual temperature of the refrigerant of the cold water unit from the target temperature of the refrigerant to obtain a difference value.

[0055] S104: controlling the energy storage liquid cooling system to operate in a fluorine pump refrigeration mode or a compressor refrigeration mode according to the difference value.

[0056] From the above embodiment, it can be known that the embodiment can determine the load size based on the difference between the actual temperature of the refrigerant of the cold water unit and the target temperature of the refrigerant of the energy storage liquid cooling system in the spring and autumn transition season, and control the system to operate in the fluorine pump refrigeration mode in the low load and operate in the compressor refrigeration mode in the high load, so as to increase the running time of the fluorine pump refrigeration mode and reduce the running time of the compressor refrigeration mode on the basis of ensuring the refrigeration capacity of the system, thereby improving the energy efficiency ratio of the system and improving the energy saving effect of the energy storage liquid cooling system.

[0057] In one possible implementation, with reference to Figure 2 and Figure 3 , the specific implementation process of S104 includes:

[0058] S201: if the difference value is not greater than a first preset difference value A0, controlling the energy storage liquid cooling system to operate in a fluorine pump refrigeration mode;

[0059] S202: if the difference value is greater than the first preset difference value A0, controlling the energy storage liquid cooling system to operate in a compressor refrigeration mode.

[0060] In the embodiment, if the difference between the actual temperature Tx of the refrigerant of the cold water unit and the target temperature Ts of the refrigerant is not greater than the first preset difference value A0, it indicates that the low load scene is at this time, and the refrigeration capacity output by the fluorine pump refrigeration mode can meet the low load demand, so the controller controls the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode. If the difference between the actual temperature Tx of the refrigerant of the cold water unit and the target temperature Ts of the refrigerant is not greater than the first preset difference value A0, it indicates that the load demand is high at this time, and the refrigeration capacity output by the system in the fluorine pump refrigeration mode cannot meet the load demand, so the controller controls the energy storage liquid cooling system to operate in the compressor refrigeration mode.

[0061] In one possible implementation, with reference to Figure 3The specific implementation process of S104 includes:

[0062] If the duration of the difference not being greater than the first preset difference exceeds the first preset duration, the energy storage liquid cooling system is controlled to operate in the fluorine pump refrigeration condition, otherwise the energy storage liquid cooling system is controlled to operate in the compressor refrigeration condition.

[0063] Specifically, the first preset duration is counted from the first time when the difference is greater than the first preset difference. If the difference between the actual temperature of the chilled water unit and the target temperature of the chilled water is less than the first preset difference within the first preset duration after the start of the counting, the energy storage liquid cooling system is controlled to operate in the fluorine pump refrigeration condition. If the difference between the actual temperature of the chilled water unit and the target temperature of the chilled water is greater than the first preset difference, the energy storage liquid cooling system is controlled to operate in the compressor refrigeration condition.

[0064] Specifically, the first preset duration can be in the range of 10-20 minutes, and preferably, the first preset duration is 15 minutes.

[0065] The above method not only ensures the refrigeration effect of the energy storage liquid cooling system, but also prolongs the time of using natural cold source and shortens the compressor refrigeration time, thereby improving the system energy efficiency ratio.

[0066] In one possible implementation, after S104, the method provided in this embodiment further includes:

[0067] When the energy storage liquid cooling system operates in the fluorine pump refrigeration condition, the difference between the actual temperature Tx of the chilled water unit of the energy storage liquid cooling system and the target temperature Ts of the chilled water is updated;

[0068] It is judged whether the updated difference is greater than the target temperature difference A;

[0069] If the updated difference is greater than the target temperature difference A, the energy storage liquid cooling system is controlled to switch to the compressor refrigeration condition;

[0070] If the updated difference is not greater than the target temperature difference A, the energy storage liquid cooling system is controlled to remain in the fluorine pump refrigeration condition.

[0071] In this embodiment, in the transition season, if the energy storage liquid cooling system operates in the fluorine pump refrigeration condition, the controller monitors the difference between the actual temperature of the chilled water unit and the target temperature of the chilled water in real time. If the duration of the difference being greater than the target temperature difference exceeds the second preset duration, it is determined that the refrigeration capacity of the energy storage liquid cooling system cannot meet the load demand, and the energy storage liquid cooling system is controlled to switch to the compressor refrigeration condition, otherwise the energy storage liquid cooling system is controlled to continue operating in the fluorine pump refrigeration condition.

[0072] Specifically, the target temperature difference is a value obtained by subtracting the correction temperature value from the first preset difference A0. For example, the first preset difference can be 5°C, and the correction temperature value is positively correlated with the time of entering the fluorine pump refrigeration working condition, that is, the correction temperature value is 0 at the beginning of the time counting, and the correction temperature value is increased by a unit correction value every preset time interval. That is, after entering the fluorine pump refrigeration working condition, the correction temperature value is calculated by the formula ΔT·k, and the target temperature value is A = A0- ΔT·k, wherein A represents the target temperature difference, A0 represents the first preset difference, ΔT represents the unit correction value, and k represents a value obtained by dividing the running time length of entering the fluorine pump refrigeration working condition by the preset time interval and then rounding off.

[0073] For example, the unit correction value can be 0.5°C, and the preset interval time length can be 30 min to 90 min.

[0074] In one embodiment, when the energy storage liquid cooling system is running in the compressor refrigeration working condition, the difference between the actual temperature of the chilled water unit and the target temperature of the chilled water is monitored in real time, and if the duration of the difference being less than or equal to zero exceeds a third preset time length, the current load is calculated according to the current output refrigerating capacity of the compressor, and if the current load is less than a preset load and the outdoor temperature is greater than a first environmental temperature threshold and less than a third environmental temperature threshold, the energy storage liquid cooling system is controlled to switch to the fluorine pump refrigeration working condition.

[0075] Specifically, the preset load is the refrigerating capacity that can be output by the energy storage liquid cooling system at the current outdoor temperature, which can be calculated according to the current outdoor temperature. The third environmental temperature threshold is greater than the first environmental temperature threshold and less than the second environmental temperature threshold, for example, the value of the third environmental temperature threshold can be 8°C to 13°C, and preferably, the third environmental temperature threshold can be 10°C.

[0076] The above method can further prolong the running time length of the fluorine pump refrigeration working condition on the basis of ensuring the refrigerating capacity of the energy storage liquid cooling system, thereby further improving the energy efficiency ratio of the system and improving the energy saving effect of the system.

[0077] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0078] The following is a device embodiment of the present application. For details not described in detail, reference can be made to the corresponding method embodiments described above.

[0079] Figure 4 A structure diagram of a control device of a fluorine pump double-cycle energy storage liquid cooling system provided by an embodiment of the present application is shown. For ease of illustration, only the parts related to the embodiments of the present application are shown, and the details are described as follows:

[0080] As shown in the figure, the control device 100 of the energy storage liquid cooling system with fluorine pump double circulation comprises: Figure 4

[0081] The outdoor temperature acquisition module 110 is configured to acquire an outdoor temperature.

[0082] The secondary-side outlet water temperature acquisition module 120 is configured to acquire an actual temperature of refrigerant of a chilled water unit of the energy storage liquid cooling system and a target temperature of the refrigerant if the outdoor temperature is greater than a first ambient temperature threshold and not greater than a second ambient temperature threshold; the first ambient temperature threshold is less than the second ambient temperature threshold.

[0083] The difference calculation module 130 is configured to subtract the target temperature of the refrigerant from the actual temperature of the refrigerant of the chilled water unit to obtain a difference.

[0084] The operating condition determination module 140 is configured to control the energy storage liquid cooling system to operate in a fluorine pump refrigeration operating condition or a compressor refrigeration operating condition according to the difference.

[0085] In one possible implementation, the operating condition determination module 140 comprises:

[0086] If the difference is not greater than a first preset difference, the energy storage liquid cooling system is controlled to operate in the fluorine pump refrigeration operating condition.

[0087] If the difference is greater than the first preset difference, the energy storage liquid cooling system is controlled to operate in the compressor refrigeration operating condition.

[0088] In one possible implementation, the operating condition determination module 140 further comprises:

[0089] If a duration for which the difference is not greater than the first preset difference exceeds a first preset duration, the energy storage liquid cooling system is controlled to operate in the fluorine pump refrigeration operating condition, otherwise the energy storage liquid cooling system is controlled to operate in the compressor refrigeration operating condition.

[0090] In one possible implementation, the control device 100 of the energy storage liquid cooling system with fluorine pump double circulation further comprises an operating condition switching module configured to:

[0091] When the energy storage liquid cooling system operates in the fluorine pump refrigeration operating condition, update the difference between the actual temperature of the refrigerant and the target temperature of the refrigerant of the chilled water unit of the energy storage liquid cooling system.

[0092] Determine whether the updated difference is greater than a target temperature difference.

[0093] If the updated difference is greater than the target temperature difference, the energy storage liquid cooling system is controlled to switch to the compressor refrigeration operating condition. ​

[0094] If the updated difference value is not greater than the target temperature difference value, the control device controls the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode.

[0095] In one possible implementation, the control device 100 of the energy storage liquid cooling system with fluorine pump double circulation further includes:

[0096] a fluorine pump refrigeration module configured to control the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode if the outdoor temperature is not greater than the first ambient temperature threshold value.

[0097] In one possible implementation, the control device 100 of the energy storage liquid cooling system with fluorine pump double circulation further includes:

[0098] a compressor refrigeration module configured to control the energy storage liquid cooling system to operate in the compressor refrigeration mode if the outdoor temperature is greater than the second ambient temperature threshold value.

[0099] The above device can determine the load size based on the difference between the actual temperature of the refrigerant of the cold water unit of the energy storage liquid cooling system and the target temperature in the spring and autumn transition season, and control the system to operate in the fluorine pump refrigeration mode in low load and in the compressor refrigeration mode in high load, thereby increasing the running time of the fluorine pump refrigeration mode on the basis of ensuring the refrigeration capacity of the system, improving the energy efficiency ratio of the system, and improving the energy saving effect of the energy storage liquid cooling system.

[0100] The control device 100 of the energy storage liquid cooling system with fluorine pump double circulation provided in the embodiment can be used to execute the control method embodiments of the energy storage liquid cooling system with fluorine pump double circulation, and has similar implementation principles and technical effects, which will not be described here.

[0101] Figure 5 is a schematic diagram of a controller provided in an embodiment of the present application. As shown in the figure, the controller 5 of the embodiment includes a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. The processor 50 implements the steps in the above various control method embodiments of the energy storage liquid cooling system with fluorine pump double circulation when executing the computer program 52, such as steps 101 to 104 shown in the figure. Figure 5 Alternatively, the processor 50 implements the functions of the modules / units in the above various device embodiments when executing the computer program 52, such as the functions of the modules 110 to 140 shown in the figure. Figure 2 Alternatively, the processor 50 implements the functions of the modules / units in the above various device embodiments when executing the computer program 52, such as the functions of the modules 110 to 140 shown in the figure. Figure 4 Alternatively, the processor 50 implements the functions of the modules / units in the above various device embodiments when executing the computer program 52, such as the functions of the modules 110 to 140 shown in the figure.

[0102] By way of example, the computer program 52 can be segmented into one or more modules / units stored in the memory 51 and executed by the processor 50 to accomplish the present application. The one or more modules / units can be a series of computer program instruction segments capable of accomplishing a specific function, which are used to describe the execution process of the computer program 52 in the controller 5.

[0103] The controller 5 can include, but is not limited to, the processor 50 and the memory 51. Those skilled in the art can understand that the controller 5 can include more or fewer components than those shown, or combine some components, or include different components, for example, the controller can also include an input / output device, a network access device, a bus, etc. Figure 5 The controller 5 is merely an example and does not constitute a limitation on the controller 5, and can include more or fewer components than those shown, or combine some components, or include different components, for example, the controller can also include an input / output device, a network access device, a bus, etc.

[0104] The processor 50 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0105] The memory 51 can be an internal storage unit of the controller 5, such as a hard disk or a memory of the controller 5. The memory 51 can also be an external storage device of the controller 5, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 51 can include both an internal storage unit and an external storage device of the controller 5. The memory 51 is used to store the computer program and other programs and data required by the controller. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0106] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0107] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0108] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0109] In the embodiments provided by the present application, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the above-described device / controller embodiments are only schematic. For example, the division of the modules or units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed modules can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0110] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0111] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0112] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer-readable storage medium. The computer program can implement the steps of each of the above-mentioned fluorine pump double-circulation energy storage liquid cooling system control method embodiments when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, an executable file, or some intermediate form, etc. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the contents included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0113] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A control method of a fluorine pump double-circulation energy storage liquid cooling system, characterized by, The method comprises the following steps: obtaining an outdoor temperature; if the outdoor temperature is greater than a first ambient temperature threshold and is not greater than a second ambient temperature threshold, obtaining an actual refrigerant temperature and a target refrigerant temperature of a chilled water unit of the energy storage liquid cooling system; the first ambient temperature threshold is less than the second ambient temperature threshold; subtracting the actual refrigerant temperature of the chilled water unit from the target refrigerant temperature to obtain a difference value; controlling the energy storage liquid cooling system to operate in a fluorine pump refrigeration mode or a compressor refrigeration mode according to the difference value; the controlling the energy storage liquid cooling system to operate in a fluorine pump refrigeration mode or a compressor refrigeration mode according to the difference value comprises: if the difference value is not greater than a first preset difference value, controlling the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode; if the difference value is greater than the first preset difference value, controlling the energy storage liquid cooling system to operate in the compressor refrigeration mode; the controlling the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode if the difference value is not greater than the first preset difference value and controlling the energy storage liquid cooling system to operate in the compressor refrigeration mode if the difference value is greater than the first preset difference value comprises: if the duration for which the difference value is not greater than the first preset difference value exceeds a first preset duration, controlling the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode, otherwise controlling the energy storage liquid cooling system to operate in the compressor refrigeration mode.

2. The control method of the fluoro-pump dual-cycle energy storage liquid cooling system according to claim 1, wherein, after the controlling the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode, the method further comprises: updating the difference value between the actual refrigerant temperature and the target refrigerant temperature of the chilled water unit of the energy storage liquid cooling system while the energy storage liquid cooling system operates in the fluorine pump refrigeration mode; determining whether the updated difference value is greater than a target temperature difference value; if the updated difference value is greater than the target temperature difference value, controlling the energy storage liquid cooling system to switch to the compressor refrigeration mode; if the updated difference value is not greater than the target temperature difference value, controlling the energy storage liquid cooling system to remain in the fluorine pump refrigeration mode.

3. The control method of the fluoro-pump dual-cycle energy storage liquid cooling system according to claim 1, wherein, after the obtaining an outdoor temperature, the method further comprises: if the outdoor temperature is not greater than the first ambient temperature threshold, controlling the energy storage liquid cooling system to operate in the fluorine pump refrigeration mode.

4. The control method of the fluoro-pump dual-cycle energy storage liquid cooling system according to claim 1, wherein, after the obtaining an outdoor temperature, the method further comprises: if the outdoor temperature is greater than the second ambient temperature threshold, controlling the energy storage liquid cooling system to operate in the compressor refrigeration mode.

5. A control device of a fluorine pump double circulation energy storage liquid cooling system, characterized in that, The method comprises the following steps: an outdoor temperature obtaining module is configured to obtain an outdoor temperature; a secondary side outlet water temperature obtaining module is configured to, if the outdoor temperature is greater than a first ambient temperature threshold and is not greater than a second ambient temperature threshold, obtain an actual refrigerant temperature and a target refrigerant temperature of a chilled water unit of the energy storage liquid cooling system; the first ambient temperature threshold is less than the second ambient temperature threshold; a difference value calculating module is configured to subtract the actual refrigerant temperature of the chilled water unit from the target refrigerant temperature to obtain a difference value; a running mode determining module is configured to control the energy storage liquid cooling system to operate in a fluorine pump refrigeration mode or a compressor refrigeration mode according to the difference value; the running mode determining module comprises: If the difference is not greater than a first preset difference, the energy storage liquid cooling system is controlled to operate in a fluorine pump refrigeration working condition; If the difference is greater than the first preset difference, the energy storage liquid cooling system is controlled to operate in a compressor refrigeration working condition; The working condition determination module further comprises: If the duration that the difference is not greater than the first preset difference exceeds a first preset duration, the energy storage liquid cooling system is controlled to operate in the fluorine pump refrigeration working condition, otherwise, the energy storage liquid cooling system is controlled to operate in the compressor refrigeration working condition.

6. A fluorous pump dual-cycle energy storage liquid cooling system, characterized in that, Comprise: A refrigeration unit, a cold water unit, and a controller for performing the control method of the fluorine pump double cycle of the energy storage liquid cooling system according to any one of claims 1 to 4; The refrigeration unit comprises a fluorine pump and a compressor; the cold water unit comprises a plate heat exchanger; The refrigeration unit generates cold energy through the fluorine pump or the compressor; The cold water unit exchanges heat with the refrigeration unit through the plate heat exchanger.

7. The fluorous pump dual-cycle energy storage liquid cooling system of claim 6, wherein, The refrigeration unit further comprises a condenser, a liquid storage tank, a first one-way valve, a second one-way valve, and a throttling component; The first end of the compressor is connected with the first end of the primary side of the plate heat exchanger, the second end of the compressor is connected with the first end of the condenser, the second end of the condenser is connected with the first end of the liquid storage tank, the second end of the liquid storage tank is connected with the first end of the fluorine pump, the second end of the fluorine pump is connected with the first end of the throttling component, and the second end of the throttling component is connected with the second end of the primary side of the plate heat exchanger; The positive electrode of the first one-way valve is connected with the first end of the compressor, and the negative electrode of the first one-way valve is connected with the second end of the compressor; The positive electrode of the second one-way valve is connected with the first end of the liquid storage tank, and the negative electrode of the second one-way valve is connected with the second end of the fluorine pump.

8. The fluorous pump dual-cycle energy storage liquid cooling system of claim 6, wherein, The cold water unit further comprises an external circulating water pump, a first automatic exhaust valve, a second automatic exhaust valve, a terminal water distributor, and a terminal water collector; The first end of the external circulating water pump is connected with the first end of the secondary side of the plate heat exchanger in communication, the second end of the external circulating water pump is connected with the terminal water distributor in communication, the second end of the secondary side of the plate heat exchanger is connected with the terminal water collector in communication, the external circulating water pump is provided with the first automatic exhaust valve on the pipeline of the terminal water distributor, and the terminal water collector is provided with the second automatic exhaust valve on the pipeline of the plate heat exchanger.

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