Control methods, devices, equipment and media of dual-fluorine pump refrigeration systems

Abstract

This invention discloses a control method, apparatus, equipment, and medium for a dual-fluorine pump refrigeration system. The dual-fluorine pump refrigeration system includes a first compressor, a first fluorine pump, a second compressor, and a second fluorine pump. The method includes: acquiring the return air temperature and a target set temperature, and controlling the operation of the first compressor, the first fluorine pump, the second compressor, and the second fluorine pump based on the return air temperature, the target set temperature, and a preset return air temperature threshold; monitoring the return air temperature and, when the return air temperature approaches the target set temperature, controlling the first compressor to shut down and increasing the operating frequency of the first fluorine pump, or controlling the second compressor to shut down and increasing the operating frequency of the second fluorine pump. This application improves the refrigeration effect by increasing the operating frequency of the fluorine pump while shutting down the compressor, preventing the compressor from restarting due to large ambient temperature fluctuations caused by shutting down one compressor, thus avoiding frequent compressor start-stop cycles and extending the compressor's service life.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a control method, device, equipment and medium for a dual-fluorine pump refrigeration system. Background Technology

[0002] In the field of refrigeration technology, refrigerant pump refrigeration systems, as a highly efficient and energy-saving refrigeration solution, have been widely used. Currently, this system mainly operates in three modes: compressor operation mode, compressor and refrigerant pump mixed operation mode, and refrigerant pump operation mode. The switching mechanism between these three modes mainly relies on the judgment of ambient temperature or indoor-outdoor temperature difference to achieve a balance between cooling effect and energy consumption. In particular, when the environmental conditions are suitable and the dual-system unit enters the mixed cooling mode, the variable frequency refrigerant pump can dynamically adjust its operating frequency according to changes in ambient temperature, thereby optimizing cooling efficiency. However, in the existing technology, if the working status of the fixed frequency compressor and the variable frequency refrigerant pump is not effectively coordinated, it will lead to frequent start-stop of the fixed frequency compressor in the dual system. This will not only severely shorten the service life of the compressor, but also cause large fluctuations in ambient temperature, affecting the stability and reliability of the refrigeration system. Summary of the Invention

[0003] This invention provides a control method, apparatus, equipment, and medium for a dual-fluorine pump refrigeration system, aiming to solve the problem of frequent start-stop of the fixed-frequency compressor in existing fluorine pump refrigeration systems.

[0004] In a first aspect, embodiments of the present invention provide a control method for a dual-fluorine pump refrigeration system, the dual-fluorine pump refrigeration system comprising: a first compressor, a first fluorine pump, a second compressor, and a second fluorine pump, the method comprising:

[0005] The return air temperature and the target set temperature are obtained, and the operation of the first compressor, the first refrigerant pump, the second compressor, and the second refrigerant pump is controlled according to the return air temperature, the target set temperature, and the preset return air temperature threshold.

[0006] Monitor the return air temperature and when the return air temperature approaches the target set temperature, control the first compressor to shut down and increase the operating frequency of the first refrigerant pump, or control the second compressor to shut down and increase the operating frequency of the second refrigerant pump.

[0007] In a second aspect, the present invention also provides a control device for a dual-fluorine pump refrigeration system, including a unit for performing the method described in the first aspect.

[0008] Thirdly, embodiments of the present invention also provide a computer device, the computer device including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method of the first aspect described above.

[0009] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the method described in the first aspect.

[0010] This invention provides a control method, apparatus, equipment, and medium for a dual-fluorine pump refrigeration system. The dual-fluorine pump refrigeration system includes a first compressor, a first fluorine pump, a second compressor, and a second fluorine pump. The method includes: acquiring a return air temperature and a target set temperature, and controlling the operation of the first compressor, the first fluorine pump, the second compressor, and the second fluorine pump based on the return air temperature, the target set temperature, and a preset return air temperature threshold; monitoring the return air temperature and, when the return air temperature approaches the target set temperature, controlling the first compressor to shut down and increasing the operating frequency of the first fluorine pump, or controlling the second compressor to shut down and increasing the operating frequency of the second fluorine pump. This application improves the cooling effect by timely shutting down the first compressor or the second compressor after entering a hybrid operation mode, and simultaneously increasing the operating frequency of the first fluorine pump, or simultaneously shutting down the second compressor and increasing the operating frequency of the second fluorine pump. Increasing the operating frequency of the fluorine pump improves the cooling effect, prevents the compressor from restarting due to large ambient temperature fluctuations caused by shutting down one compressor, avoids frequent compressor start-stop, extends the compressor's service life, and improves reliability. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a flowchart illustrating the steps of the control method for the dual-fluorine pump refrigeration system according to an embodiment of the present invention.

[0013] Figure 2 This is a schematic diagram of the sub-steps of the control method of the dual-fluorine pump refrigeration system according to an embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of another sub-step of the control method of the dual-fluorine pump refrigeration system according to an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of a sub-step of a control method for a dual-fluorine pump refrigeration system according to another embodiment of the present invention;

[0016] Figure 5This is a schematic diagram of another sub-step of the control method of a dual-fluorine pump refrigeration system according to another embodiment of the present invention;

[0017] Figure 6 This is a schematic diagram of the sub-steps of the control method for a dual-fluorine pump refrigeration system according to another embodiment of the present invention;

[0018] Figure 7 This is a schematic diagram of another sub-step of the control method of a dual-fluorine pump refrigeration system according to yet another embodiment of the present invention;

[0019] Figure 8 This is a simplified control logic diagram of the dual-fluorine pump refrigeration system according to an embodiment of the present invention;

[0020] Figure 9 A schematic block diagram of the control device for a dual-fluorine pump refrigeration system provided in an embodiment of the present invention;

[0021] Figure 10 This is a schematic block diagram of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0026] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0027] This invention provides a control method for a dual-fluorine pump refrigeration system. This dual-fluorine pump refrigeration system is a dual-system refrigeration unit, comprising a first fluorine pump refrigeration system and a second fluorine pump refrigeration system. The two fluorine pump refrigeration systems have identical structures and share a common controller. Each fluorine pump refrigeration system includes a compressor, a condenser, a liquid receiver, a fluorine pump, an expansion valve, and an evaporator. The compressor, condenser, liquid receiver, fluorine pump, expansion valve, and evaporator are sequentially connected to form a refrigeration cycle loop. The compressor and fluorine pump are connected in parallel to each other via branches, each branch equipped with a one-way valve A and a one-way valve B. One-way valve A is connected in parallel with the compressor, and one-way valve B is connected in parallel with the fluorine pump. For ease of description, the compressor and fluorine pump in the first fluorine pump refrigeration system are referred to as the first compressor and the first fluorine pump, and the compressor and fluorine pump in the second fluorine pump refrigeration system are referred to as the second compressor and the second fluorine pump. The dual-fluorine pump refrigeration system of this embodiment is mainly used in environments requiring large-volume cooling, such as computer room air conditioning; however, it can also be used in other applications.

[0028] Please see Figure 1 , Figure 1 This is a flowchart illustrating the control method for a dual-fluorine pump refrigeration system provided in an embodiment of the present invention. The control method for the dual-fluorine pump refrigeration system will be described in detail below. Figure 10 As shown, the method includes the following steps: S110-S120.

[0029] S110. Obtain the return air temperature and the target set temperature, and control the first compressor, the first refrigerant pump, the second compressor and the second refrigerant pump to operate according to the return air temperature, the target set temperature and the preset return air temperature threshold.

[0030] In this embodiment, the return air temperature refers to the temperature value detected by the return air from the indoor unit. The return air temperature can also be considered the server room temperature, and it is obtained through a temperature sensor. The target set temperature refers to the temperature set by the user, for example, the standard server room temperature set in the controller is 22 degrees Celsius. The target set temperature can be changed according to the needs of the server room. The preset return air temperature threshold refers to the alarm value for the server room temperature, for example, 28 degrees Celsius. When this temperature is reached, the machines in the server room will experience heat dissipation problems, resulting in poor heat dissipation and excessively high temperatures, leading to unstable machine operation. Therefore, a preset return air temperature threshold is needed to prevent the server room temperature from becoming too high. The first compressor and the first refrigerant pump are the compressor and refrigerant pump in the first refrigerant pump refrigeration system, and the second compressor and the second refrigerant pump are the compressor and refrigerant pump in the second refrigerant pump refrigeration system. To ensure a suitable server room temperature, the operation of the first compressor, the first refrigerant pump, the second compressor, and the second refrigerant pump needs to be reasonably controlled using these three parameters: return air temperature, target set temperature, and return air temperature threshold. This precise control of the server room temperature ensures the reliability of the machines operating within the server room. Specifically, different control actions can be taken by comparing the return air temperature separately with the target set temperature and the preset return air temperature threshold, or by comparing the return air temperature together with both the target set temperature and the preset return air temperature threshold. Of course, other judgment methods are also possible. Generally, the dual-fluorine pump refrigeration system will perform different actions based on the return air temperature to adjust the cooling effect and maintain the return air temperature at a suitable level. In principle, the higher the return air temperature, the higher the temperature in the computer room and the greater the cooling demand. In this case, the first compressor, first refrigerant pump, second compressor, and second refrigerant pump will all be activated to release a large amount of cooling capacity to meet the cooling demand. Conversely, if the return air temperature is close to the target set temperature, it indicates that the temperature in the computer room is suitable and the cooling demand is smaller. In this case, it is not necessary to activate all the refrigeration components; activating one or more of them is sufficient to meet the corresponding cooling capacity, while the remaining refrigeration components can be turned off to save energy. Therefore, by defining the return air temperature based on the target set temperature and the preset return air temperature threshold, the current cooling capacity required by the computer room can be determined. Then, according to the current cooling capacity required, the corresponding number of cooling components can be turned on to match the current cooling demand. This allows for precise control of the computer room temperature and improves the safety and reliability of the computer room operation.

[0031] S120. Monitor the return air temperature and when the return air temperature approaches the target set temperature, control the first compressor to shut down and increase the operating frequency of the first refrigerant pump, or control the second compressor to shut down and increase the operating frequency of the second refrigerant pump.

[0032] In this embodiment, after controlling the operation of the aforementioned refrigeration components, the return air temperature is continuously monitored. After running for a period of time, the return air temperature will gradually decrease until it reaches near the target set temperature, indicating that the room temperature has dropped and the cooling capacity generated by the unit is greater than the heat generated in the room. When the return air temperature approaches the target set temperature, one of the compressors can be shut down, i.e., the first compressor or the second compressor. In this embodiment, the first and second compressors are fixed-frequency compressors, which typically stop after reaching the set temperature. In this embodiment, when the return air temperature approaches the target set temperature, it indicates that the room temperature is suitable, so one compressor is shut down, while the other compressor continues to run without stopping. Simultaneously, the operating frequency of the refrigerant pump is increased. In a refrigerant pump refrigeration system, the refrigerant pump can assist or replace some of the compressor's functions, especially under certain conditions, such as when the outdoor temperature is low (nighttime or light-load refrigeration scenarios in winter). Using a refrigerant pump to drive refrigerant circulation can reduce the workload of the compressor, thereby saving energy consumption. Simply put, a refrigerant pump can also be used for refrigeration, but its refrigeration effect is not as good as that of a compressor. Therefore, increasing the operating frequency of the refrigerant pump can improve the cooling effect. Shutting down the compressor may cause significant temperature fluctuations (temperature rise). Increasing the operating frequency of the refrigerant pump improves the cooling effect, offsetting the cooling loss caused by shutting down the compressor, reducing temperature fluctuations, and thus preventing the compressor from restarting due to temperature rise, reducing the number of compressor start-stop cycles. It should be noted that this embodiment can either shut down the first compressor while increasing the operating frequency of the first refrigerant pump, or shut down the second compressor while increasing the operating frequency of the second refrigerant pump, depending on the current operating conditions. For example, if only the first compressor and the first refrigerant pump are currently operating, then the first compressor is shut down while the operating frequency of the first refrigerant pump is increased; if the first compressor and the first refrigerant pump, as well as the second compressor and the second refrigerant pump, are all operating, then either the first compressor can be shut down while increasing the operating frequency of the first refrigerant pump, or the second compressor can be shut down while increasing the operating frequency of the second refrigerant pump. This is not limited here. By increasing the operating frequency of the refrigerant pump while shutting down the compressor, the large temperature fluctuations caused by shutting down the compressor are offset, thus preventing the compressor from restarting, avoiding frequent compressor start-stop cycles, extending the compressor's lifespan, and improving reliability.

[0033] In one embodiment, such as Figure 2 As shown, step S110 includes: S111-S112.

[0034] S111. Determine whether the return air temperature is greater than or equal to the preset return air temperature threshold.

[0035] S112. If so, control the first compressor and the first refrigerant pump to start and operate at the rated frequency, and control the second compressor and the second refrigerant pump to start and operate at the rated frequency.

[0036] In this embodiment, the preset return air temperature threshold is an alarm value for the computer room temperature. When the return air temperature exceeds this preset threshold, it indicates that the computer room is overheating and requires a large amount of cooling capacity for temperature reduction. Specifically, by comparing the return air temperature T... 回 and preset return air temperature threshold T 报 If T 回 ≥T 报 This indicates that the computer room is overheating. All cooling components are activated for cooling, therefore the first compressor, first refrigerant pump, second compressor, and second refrigerant pump are all turned on and running at their rated frequencies. Specifically, the first compressor and first refrigerant pump are turned on first, followed by the second compressor and second refrigerant pump after a one-minute interval, to quickly release a large amount of cooling capacity to lower the computer room temperature below the preset return air temperature threshold, preventing overheating of the machines and improving safety and reliability.

[0037] In one embodiment, such as Figure 3 As shown, step S120 includes: S121-S124.

[0038] S121. Determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the difference between the target set temperature and the preset accuracy value.

[0039] S122. If yes, then obtain the first cumulative runtime of the first compressor and the second cumulative runtime of the second compressor, and compare the first cumulative runtime and the second cumulative runtime.

[0040] S123. If the first cumulative running time is greater than the second cumulative running time, then control the first compressor to shut down and control the first refrigerant pump to run at the maximum operating frequency.

[0041] S124. If the second cumulative running time is greater than the first cumulative running time, then control the second compressor to shut down and control the second refrigerant pump to run at the maximum operating frequency.

[0042] In this embodiment, a preset accuracy value is used to define a temperature range. This value is a constant; for example, if the preset accuracy value is set to 1°C and the current set temperature is 24°C, then a temperature range of 23°C-25°C can be defined using this preset accuracy value. After the refrigeration components start operating, the unit begins to release cooling capacity. At this time, the return air temperature is continuously monitored and will gradually decrease until it approaches the target set temperature. It should be noted that the compressor is not shut down only after the return air temperature drops to equal to or below the target set temperature. Rather, the compressor can be shut down when the return air temperature is close to the target set temperature, for example, slightly above the target set temperature. Specifically, this can be achieved by using a preset accuracy value T. 精 To make adjustments, the sum of the target set temperature and the preset accuracy value is T. 设 +T 精 The difference between the target set temperature and the preset accuracy value is T. 设 -T 精 When T 设 -T 精 <T 回 <T 设 +T 精 This indicates that the current return air temperature has dropped to near the target set temperature, and the compressor can be shut down. When shutting down the compressor, either the first compressor or the second compressor can be shut down. In this embodiment, the compressor with the longer cumulative running time is selected for shutdown. Specifically, the first cumulative running time t1 of the first compressor and the second cumulative running time t2 of the second compressor are obtained. Comparing t1 and t2, the larger one is selected. If t1 > t2, it means the first compressor has a longer cumulative running time, so the first compressor is shut down and the first refrigerant pump operates at its maximum frequency. If t2 > t1, it means the second compressor has a longer cumulative running time, so the second compressor is shut down and the second refrigerant pump operates at its maximum frequency. By comparing the cumulative running times and shutting down the compressor with the longer cumulative running time, the running time of the two compressors can be balanced, making their usage time as similar as possible, avoiding prolonged use of the same compressor, and extending the compressor's lifespan. Furthermore, adjusting the refrigerant pump's operating frequency to the maximum maximizes the cooling effect, avoids large temperature fluctuations caused by shutting down the compressor, prevents the compressor from restarting, and solves the problem of frequent compressor start-stop.

[0043] In another embodiment, such as Figure 4 As shown, step S110 includes: S211-S212.

[0044] S211. Determine whether the return air temperature is less than the preset return air temperature threshold and greater than the sum of the target set temperature and the preset accuracy value;

[0045] S212. If so, control the first compressor and the first refrigerant pump to start and operate at the rated frequency, and control the second refrigerant pump to start and operate at the rated frequency.

[0046] In this embodiment, the target set temperature is the temperature set by the user. If the computer room temperature is at the target set temperature, it indicates that the current temperature of the computer room is suitable. However, if the computer room temperature is higher than the target set temperature, it indicates that the temperature of the computer room is too high and a larger cooling capacity is required for cooling. Specifically, this is achieved by comparing the return air temperature T. 回 and target set temperature T 设 and preset return air temperature threshold T 报 If T 设 +T 精 <T 回 <T 报 This indicates that while the current temperature in the computer room is not overheated, it is still relatively high. It's not necessary to activate all cooling components, but one compressor should still be turned on to provide sufficient cooling capacity. Therefore, the first compressor and the first refrigerant pump should be started and operated at their rated frequencies. The second compressor can be turned off; only the second refrigerant pump should be activated and operated at its rated frequency. Activating these cooling components will provide sufficient cooling capacity to lower the temperature, allowing the computer room temperature to drop to near the target set temperature as quickly as possible, preventing excessively high temperatures and improving the stability and reliability of the machine operation.

[0047] In another embodiment, such as Figure 5 As shown, step S120 includes: S221-S222.

[0048] S221. Determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the target set temperature;

[0049] If S222 is true, then control the first compressor to shut down and control the first refrigerant pump to operate at the maximum operating frequency.

[0050] In this embodiment, after the refrigeration components operate, the unit begins to release cooling capacity. At this time, the return air temperature is continuously monitored and gradually decreases. The sum of the target set temperature and the preset accuracy value is T. 设 +T 精 When T 设 <T 回 <T 设 +T 精This indicates that the current return air temperature has dropped to near the target set temperature, and the compressor can be shut down. In this embodiment, since only the first compressor was running previously and the second compressor was not activated, this embodiment shuts down the first compressor and operates the first refrigerant pump at its maximum frequency to maximize cooling efficiency, avoid large temperature fluctuations caused by compressor shutdown, prevent compressor restarts, and solve the problem of frequent compressor start-stops.

[0051] In yet another embodiment, such as Figure 6 As shown, step S110 includes: S311-S312.

[0052] S311. Determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the difference between the target set temperature and the preset accuracy value.

[0053] S312. If so, control the first fluorine pump and the second fluorine pump to operate at the rated frequency.

[0054] In this embodiment, if the computer room temperature is near the target set temperature, it indicates that the current temperature of the computer room is suitable, and only a small amount of cooling is needed for cooling. Specifically, this is achieved by comparing the return air temperature T. 回 and target set temperature T 设 The sum of the target set temperature and the preset accuracy value is T. 设 +T 精 The difference between the target set temperature and the preset accuracy value is T. 设 -T 精 If T 设 -T 精 <T 回 <T 设 +T 精 This indicates that the current temperature in the computer room is already close to the target set temperature. It is not necessary to turn on the compressor for cooling; simply turning on the refrigerant pumps is sufficient to provide enough cooling capacity to lower the temperature. Therefore, turn on both the first and second refrigerant pumps and operate them at their rated frequencies. Specifically, turn on the first refrigerant pump first, and then turn on the second refrigerant pump after a 30-second interval. This ensures that the computer room temperature reaches the target set temperature, guaranteeing a suitable temperature and improving safety and reliability.

[0055] In yet another embodiment, such as Figure 7 As shown, after step S312, the method further includes: S321-S322. S321: Determine whether the return air temperature is less than the difference between the target set temperature and the preset accuracy value;

[0056] If S322 is true, then control the first fluorine pump to shut down and control the second fluorine pump to operate at the lowest operating frequency.

[0057] In this embodiment, after the refrigeration components start operating, the unit begins to release cooling capacity. At this time, the return air temperature is continuously monitored and gradually decreases. The difference between the target set temperature and the preset accuracy value is T. 设 -T 精 When T 回 <T 设 -T 精 This indicates that the current room temperature has dropped slightly below the target set temperature, and one of the refrigerant pumps can be shut down. Only one refrigerant pump is needed to provide sufficient cooling to maintain the current temperature. Either the first or second refrigerant pump can be shut down. In this embodiment, the first refrigerant pump is shut down, while the operating frequency of the second refrigerant pump is simultaneously adjusted to its maximum. This ensures the second refrigerant pump operates at its lowest possible frequency, preventing large temperature fluctuations caused by shutting down all cooling capacity at once.

[0058] In other embodiments, if T 回 <T 设 -T 精 This indicates that the current temperature in the computer room is already slightly lower than the target set temperature, meaning that the computer room does not currently require cooling. There is no need to turn on the cooling components; simply turn on the two internal fans to ensure air circulation within the computer room.

[0059] In addition, to illustrate the method of the embodiments of the present invention, such as Figure 8 The following will explain the specific control process.

[0060] First, power on the unit and load the application. Initialize the program and check if the load is normal. Then, determine if the outdoor unit's ambient temperature is continuously below H0 within T0. This is because the refrigerant pump will only have a good cooling effect when the outdoor unit's ambient temperature is below H0. H0 is generally taken as 5℃. If it is not lower than H0, turn off the refrigerant pump. If it is lower, turn on the indoor fan and start checking the ambient temperature of the unit's indoor unit, which is also the return air temperature.

[0061] For T 回 The temperature is judged step by step from high to low. First, the first-level judgment is performed to determine T. 回 ≥T 报 If so, it indicates a large required cooling capacity. Turn on the first compressor and first refrigerant pump, as well as the second compressor and second refrigerant pump, to provide cooling. (T) 回 Gradually decrease, continuously monitor T 回 Then determine T 设 -T 精 <T 回 <T 设 +T 精 If so, shut down the compressor with the longest cumulative running time and simultaneously increase the operating frequency of the corresponding refrigerant pump to the maximum.

[0062] If T is not satisfied回 ≥T 报 Then proceed to the next level of temperature judgment, and determine T. 设 +T 精 <T 回 <T 报 If so, it indicates a large required cooling capacity. In this case, turn on the first compressor and the first refrigerant pump, as well as the second refrigerant pump, to provide cooling. (T) 回 Gradually decrease, continuously monitor T 回 Then determine T 设 <T 回 <T 设 +T 精 If so, shut down the first compressor and simultaneously increase the operating frequency of the first refrigerant pump to the maximum.

[0063] If T is not satisfied 设 +T 精 <T 回 <T 报 Then proceed to the next level of temperature judgment, and determine T. 设 -T 精 <T 回 <T 设 +T 精 If so, it means the required cooling capacity is small. Turn on the first and second refrigerant pumps for cooling. (T) 回 Gradually decrease, continuously monitor T 回 Then determine T 回 <T 设 -T 精 If so, shut down the first fluorine pump and reduce the operating frequency of the second fluorine pump to the lowest setting.

[0064] If T is not satisfied 设 -T 精 <T 回 <T 设 +T 精 Then proceed to the next level of temperature judgment, and determine T. 回 <T 设 -T 精 If so, it means that cooling is not needed at present. Turn off the two compressors and two refrigerant pumps, and only turn on the two internal fans to ensure air circulation.

[0065] In summary, the embodiments of this application use a preset return air temperature threshold T 报 Target set temperature T 设 Preset accuracy value T 精A dynamic temperature gradient judgment is established, which determines the current cooling capacity required by the computer room step by step from high to low. By judging the required cooling capacity, the corresponding number of refrigeration components are controlled to operate. The greater the required cooling capacity, the more refrigeration components are turned on, and vice versa, so as to match the required cooling capacity as much as possible and precisely control the computer room temperature. At the same time, excess refrigeration components are turned off in a timely manner. Importantly, the operating frequency of the refrigerant pump is increased while the compressor is turned off. This can improve the cooling effect, offset the cooling capacity loss caused by the compressor shutdown, avoid large temperature fluctuations, and prevent the compressor from restarting. This solves the problem of frequent compressor start-stop and improves the safety and stability of the dual refrigerant pump refrigeration system.

[0066] Figure 9 This is a schematic block diagram of a control device 400 for a dual-fluorine pump refrigeration system provided in an embodiment of the present invention. Figure 9 As shown, corresponding to the control method of the dual-fluorine pump refrigeration system described above, the present invention also provides a control device 400 for a dual-fluorine pump refrigeration system. This control device 400 includes a unit for executing the control method of the dual-fluorine pump refrigeration system described above, and the device can be configured in a computer device. Specifically, please refer to... Figure 9 The control device 400 of the dual-fluorine pump refrigeration system includes a control unit 401 and a shutdown unit 402.

[0067] The control unit 401 is used to acquire the return air temperature and the target set temperature, and control the operation of the first compressor, the first refrigerant pump, the second compressor, and the second refrigerant pump according to the return air temperature, the target set temperature, and the preset return air temperature threshold. The shutdown unit 402 is used to monitor the return air temperature and, when the return air temperature approaches the target set temperature, control the first compressor to shut down and increase the operating frequency of the first refrigerant pump, or control the second compressor to shut down and increase the operating frequency of the second refrigerant pump.

[0068] In one embodiment, the control unit 401 includes a first judgment unit and a first control subunit.

[0069] The first judgment unit is used to determine whether the return air temperature is greater than or equal to the preset return air temperature threshold; the first control subunit is used to control the first compressor and the first refrigerant pump to start and operate at the rated frequency if the condition is met, and to control the second compressor and the second refrigerant pump to start and operate at the rated frequency.

[0070] In one embodiment, the closing unit 402 includes: a second judgment unit, a comparison unit, a first closing subunit, and a second closing subunit.

[0071] The second judgment unit is used to determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the difference between the target set temperature and the preset accuracy value; the comparison unit is used to obtain the first cumulative running time of the first compressor and the second cumulative running time of the second compressor if the first cumulative running time is greater than the second cumulative running time, and compare the first cumulative running time and the second cumulative running time; the first shutdown subunit is used to control the first compressor to shut down and control the first refrigerant pump to run at the maximum operating frequency if the first cumulative running time is greater than the second cumulative running time; the second shutdown subunit is used to control the second compressor to shut down and control the second refrigerant pump to run at the maximum operating frequency if the second cumulative running time is greater than the first cumulative running time.

[0072] In another embodiment, the control unit 401 further includes a third judgment unit and a second control subunit.

[0073] The third judgment unit is used to determine whether the return air temperature is less than the preset return air temperature threshold and greater than the sum of the target set temperature and the preset accuracy value; the second control subunit is used to control the first compressor and the first refrigerant pump to start and operate at the rated frequency if the condition is met, and to control the second refrigerant pump to start and operate at the rated frequency.

[0074] In another embodiment, the shut-off unit 402 further includes a fourth judgment unit and a third shut-off subunit.

[0075] The fourth judgment unit is used to determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the target set temperature; the third shutdown subunit is used to control the first compressor to shut down and control the first refrigerant pump to run at the maximum operating frequency if the condition is met.

[0076] In another embodiment, the control unit 401 further includes a fifth judgment unit and a third control subunit.

[0077] The fifth judgment unit is used to determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the difference between the target set temperature and the preset accuracy value; the third control subunit is used to control the first fluorine pump and the second fluorine pump to operate at the rated frequency if the condition is met.

[0078] In another embodiment, the closing unit 402 further includes a sixth judgment unit and a fourth closing subunit.

[0079] The sixth judgment unit is used to determine whether the return air temperature is less than the difference between the target set temperature and the preset accuracy value; the fourth shutdown subunit is used to control the first fluorine pump to shut down and control the second fluorine pump to run at the lowest operating frequency if the condition is met.

[0080] The control device 400 of the aforementioned dual-fluorine pump refrigeration system can be implemented as a computer program, which can, for example... Figure 10 It runs on the computer device shown.

[0081] Please see Figure 10 , Figure 10 This is a schematic block diagram of a computer device provided in an embodiment of this application. The computer device 500 may be a terminal.

[0082] See Figure 10 The computer device 500 includes a processor 502, a memory, and a network interface 505 connected via a system bus 501. The memory may include a non-volatile storage medium 503 and internal memory 504.

[0083] The non-volatile storage medium 503 may store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions that, when executed, cause the processor 502 to perform a control method for a dual-fluorine pump refrigeration system.

[0084] The processor 502 provides computing and control capabilities to support the operation of the entire computer device 500.

[0085] The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute a control method for a dual-fluorine pump refrigeration system.

[0086] This network interface 505 is used for network communication with other devices. Those skilled in the art will understand that... Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device 500 to which the present application is applied. The specific computer device 500 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0087] The processor 502 is used to run a computer program 5032 stored in a memory to implement the steps of the above method.

[0088] It should be understood that in the embodiments of this application, the processor 502 may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0089] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0090] Therefore, the present invention also provides a storage medium. This storage medium can be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. When executed by a processor, the program instructions cause the processor to perform the steps of the above-described method.

[0091] The storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0092] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0093] In the several embodiments provided by this invention, 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 example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0094] The steps in the method of this invention can be adjusted, merged, or reduced in order according to actual needs. The units in the device of this invention can be merged, divided, or reduced according to actual needs. Furthermore, the functional units in the various embodiments of this invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0098] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A control method for a dual-fluorine pump refrigeration system, characterized in that, The dual-fluorine pump refrigeration system includes: a first compressor, a first fluorine pump, a second compressor, and a second fluorine pump; the method includes: Acquiring the return air temperature and the target set temperature, and controlling the operation of the first compressor, the first refrigerant pump, the second compressor, and the second refrigerant pump based on the return air temperature, the target set temperature, and a preset return air temperature threshold, includes: Determine whether the return air temperature is greater than or equal to the preset return air temperature threshold; if so, control the first compressor and the first refrigerant pump to start and operate at the rated frequency, and control the second compressor and the second refrigerant pump to start and operate at the rated frequency. Determine whether the return air temperature is less than the preset return air temperature threshold and greater than the sum of the target set temperature and the preset accuracy value; if so, control the first compressor and the first refrigerant pump to start and operate at the rated frequency, and control the second refrigerant pump to start and operate at the rated frequency. Monitoring the return air temperature and, when the return air temperature approaches the target set temperature, controlling the first compressor to shut down and increasing the operating frequency of the first refrigerant pump, or controlling the second compressor to shut down and increasing the operating frequency of the second refrigerant pump, includes: Determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the difference between the target set temperature and the preset accuracy value; if so, obtain the first cumulative running time of the first compressor and the second cumulative running time of the second compressor, and compare the first cumulative running time and the second cumulative running time; if the first cumulative running time is greater than the second cumulative running time, control the first compressor to shut down and control the first refrigerant pump to run at the maximum operating frequency; if the second cumulative running time is greater than the first cumulative running time, control the second compressor to shut down and control the second refrigerant pump to run at the maximum operating frequency. Determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the target set temperature; if so, control the first compressor to shut down and control the first refrigerant pump to operate at the maximum operating frequency.

2. The method according to claim 1, characterized in that, The step of acquiring the return air temperature and the target set temperature, and controlling the operation of the first compressor, the first refrigerant pump, the second compressor, and the second refrigerant pump based on the return air temperature, the target set temperature, and a preset return air temperature threshold, includes: Determine whether the return air temperature is less than the sum of the target set temperature and the preset accuracy value and greater than the difference between the target set temperature and the preset accuracy value; If so, control the first and second fluorine pumps to operate at their rated frequencies.

3. The method according to claim 2, characterized in that, Following the step of controlling the first and second fluorine pumps to operate at rated frequencies, the method further includes: Determine whether the return air temperature is less than the difference between the target set temperature and the preset accuracy value; If so, the first fluorine pump is shut down and the second fluorine pump is operated at the lowest possible frequency.

4. A control device for a dual-fluorine pump refrigeration system, characterized in that, The apparatus includes a unit for performing the method of any one of claims 1-3.

5. A computer device, characterized in that, The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method as described in any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that, when executed by a processor, can implement the method as described in any one of claims 1-3.

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