Machine room air conditioner control method, device and equipment, storage medium and machine room air conditioner

Abstract

The invention provides a machine room air conditioner control method, device and equipment, a storage medium and a machine room air conditioner, and belongs to the technical field of machine room air conditioners. The machine room air conditioner control method comprises the steps of determining indoor and outdoor actual temperature difference; determining a first indoor and outdoor entry temperature difference; determining a second indoor and outdoor entering temperature difference; if the indoor and outdoor actual temperature difference is larger than the first indoor and outdoor entering temperature difference, the machine room air conditioner is controlled to enter the fluorine pump refrigeration mode; if the indoor and outdoor actual temperature difference is smaller than or equal to the first indoor and outdoor entering temperature difference, and the indoor and outdoor actual temperature is larger than the second indoor and outdoor entering temperature difference, the machine room air conditioner is controlled to enter a mixed refrigeration mode; and if the indoor and outdoor actual temperature difference is smaller than or equal to the second indoor and outdoor entering temperature difference, the machine room air conditioner is controlled to enter a compressor refrigeration mode. The machine room air conditioner control method is beneficial to improving the control precision of the machine room air conditioner and improving the energy efficiency level of the machine room air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of computer room air conditioners, and in particular to a computer room air conditioner control method, device, equipment, storage medium and computer room air conditioner. Background Art

[0002] In order to achieve energy-saving effects and make full use of natural cooling sources, computer room air conditioners in related technologies need to switch to different modes in response to temperature changes.

[0003] However, since the outdoor ambient temperature is generally used as the response signal, the mode switching control of the computer room air conditioner is not accurate enough, and there is still much room for improvement in the energy efficiency utilization of the computer room air conditioner. Summary of the invention

[0004] The present application provides a computer room air conditioning control method, device, equipment, storage medium and computer room air conditioning, which can further improve the energy efficiency utilization rate of the computer room air conditioning.

[0005] The technical solution is as follows:

[0006] On the one hand, a computer room air conditioner control method is provided, which is applicable to the operation control of the computer room air conditioner, wherein the computer room air conditioner includes a fluorine pump refrigeration mode, a compressor refrigeration mode and a mixed refrigeration mode;

[0007] The computer room air conditioning control method comprises:

[0008] Determine the actual temperature difference between indoor and outdoor △T;

[0009] Determine the first indoor and outdoor entering temperature difference △Tfc;

[0010] Determine the second indoor and outdoor entry temperature difference △Tmix;

[0011] If the actual indoor and outdoor temperature difference ΔT is greater than the first indoor and outdoor entry temperature difference ΔTfc, controlling the computer room air conditioner to enter the fluorine pump cooling mode;

[0012] If the actual indoor and outdoor temperature difference ΔT is less than or equal to the first indoor and outdoor entry temperature difference ΔTfc, and the actual indoor and outdoor temperature difference ΔT is greater than the second indoor and outdoor entry temperature difference ΔTmix, then control the computer room air conditioner to enter the mixed cooling mode;

[0013] If the actual indoor and outdoor temperature difference ΔT is less than or equal to the second indoor and outdoor temperature difference ΔTmix, the computer room air conditioner is controlled to enter a compressor cooling mode.

[0014] On the other hand, a computer room air conditioning control device is provided, and the computer room air conditioning control device is used to implement the computer room air conditioning control method described in the present application;

[0015] The computer room air conditioning control device comprises:

[0016] The first determination module is used to determine the actual temperature difference ΔT between indoor and outdoor;

[0017] The second determination module determines a first indoor and outdoor entering temperature difference ΔTfc;

[0018] The third determination module determines the second indoor and outdoor entry temperature difference △Tmix;

[0019] A control module is used to control the computer room air conditioner to enter the fluorine pump cooling mode when the actual indoor and outdoor temperature difference △T is greater than the first indoor and outdoor entering temperature difference △Tfc; control the computer room air conditioner to enter the mixed cooling mode when the actual indoor and outdoor temperature difference △T is less than or equal to the first indoor and outdoor entering temperature difference △Tfc, and the actual indoor and outdoor temperature difference △T is greater than the second indoor and outdoor entering temperature difference △Tmix; control the computer room air conditioner to enter the compressor cooling mode when the actual indoor and outdoor temperature difference △T is less than or equal to the second indoor and outdoor entering temperature difference △Tmix.

[0020] On the other hand, a computer device is provided, which includes a processor and a memory, wherein the memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the computer room air conditioning control method as described in the present application.

[0021] On the other hand, a storage medium is provided, in which at least one program is stored. The at least one program is loaded and executed by a processor to implement the computer room air conditioning control method as described in the present application.

[0022] On the other hand, a computer room air conditioner is provided, which adopts the control method described in the present application or the control device described in the present application.

[0023] The beneficial effects of the technical solution provided by this application include at least:

[0024] The computer room air conditioning control method of the present application is suitable for the switching control between the fluorine pump refrigeration mode, the compressor refrigeration mode and the mixed refrigeration mode. The actual indoor and outdoor temperature difference △T is used to clarify the actual difference between the indoor temperature and the outdoor temperature, and the temperature fluctuation on the indoor side can be fully considered. By comparing the actual indoor and outdoor temperature difference △T with the first indoor and outdoor entering temperature difference △Tfc and the second indoor and outdoor entering temperature difference △Tmix, the switching between the fluorine pump refrigeration mode, the compressor refrigeration mode and the mixed refrigeration mode is controlled, which is beneficial to improving the control accuracy of the computer room air conditioning and improving the energy efficiency level of the computer room air conditioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a flowchart of a computer room air conditioning control method provided in an embodiment of the present application;

[0027] Figure 2 is a flow chart of a computer room air conditioning control method provided by another embodiment of the present application;

[0028] Figure 3 is a schematic diagram of a process for determining a first indoor and outdoor entering temperature difference ΔTfc provided in an embodiment of the present application;

[0029] Figure 4 is a schematic diagram of a process for determining a second indoor and outdoor entering temperature difference ΔTmix provided in an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of dynamic adjustment of the first indoor and outdoor temperature difference ΔTfc provided in an embodiment of the present application;

[0031] Figure 6 is a schematic diagram of dynamic adjustment of the second indoor and outdoor temperature difference ΔTmix provided in an embodiment of the present application;

[0032] Figure 7 is a schematic diagram of the structure of a control device provided in an embodiment of the present application;

[0033] Figure 8 It is a structural schematic diagram of a computer room air conditioner provided in an embodiment of the present application;

[0034] Fig. 9 It is a schematic diagram of the structure of the calculation and equipment provided in the embodiment of the present application.

[0035] The reference numerals in the figures represent respectively:

[0036] 100. Control device;

[0037] 1. First determination module; 2. Second determination module; 3. Third determination module; 4. Control module; 5. Fourth determination module;

[0038] 200. Compressor refrigeration system;

[0039] 300. Fluorine pump refrigeration system;

[0040] 400, sensor;

[0041] 1000. Computer equipment; 1001. Central processing unit; 1002. Random access memory; 1003. Read-only memory; 1004. System memory; 1005. System bus; 1006. Input / output device; 1007. Mass storage device; 1008. Operating system; 1009. Application program; 1010. Other program modules; 1011. Network interface unit. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0043] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0044] Computer room air conditioners are air conditioning systems designed specifically for computer room environments. They are used to maintain the temperature and humidity inside the computer room within an appropriate range to ensure the normal operation of servers and other equipment. Computer room air conditioners have the characteristics of efficient cooling, stable temperature control, humidity control, high reliability and multiple protection measures.

[0045] Computer room air conditioners are important equipment for computer room environment control. They can provide stable temperature and humidity conditions for the computer room to ensure the normal operation of servers and other equipment.

[0046] The computer room air conditioner in the related technology is usually a fluorine pump dual-circulation air conditioning system. When the outdoor temperature is low, it makes full use of the outdoor natural cold source, and does not need to turn on the compressor for cooling during a certain period of the year, which greatly reduces the energy consumption of the air conditioner. During the operation of the computer room air conditioner, the temperature judgment condition for mode switching mainly depends on the difference between the indoor return air temperature setting value and the outdoor temperature detection value. When the difference is large, the fluorine pump cooling mode is switched, when the difference is small, the compressor cooling mode is started, and when the difference is in the middle, the mixed cooling mode is started.

[0047] However, the indoor return air temperature limit used in the temperature judgment condition is a fixed value, so the mode switching condition is equivalent to limiting only the outdoor ambient temperature without considering the temperature control situation inside the machine room. When the actual detection value of the return air temperature of the unit is less than the set value, if the fluorine pump refrigeration mode or the mixed refrigeration mode is switched at this time, or if the fluorine pump refrigeration mode or the mixed refrigeration mode is not switched out in time, the cooling output may be insufficient. When the actual detection value of the indoor return air temperature is greater than the set value, if the fluorine pump refrigeration mode or the mixed refrigeration mode is not switched in this time, or if the fluorine pump refrigeration mode or the mixed refrigeration mode is switched out in advance, the natural cold source cannot be fully utilized and the energy-saving effect cannot be achieved.

[0048] In addition, the air conditioning system itself in the related art does not have the function of predicting the load of the computer room, so it will not adaptively adjust the switching point of the cooling mode according to the actual load in the computer room. For example, when the temperature difference between the supply and return air of the computer room air conditioner is less than the set value, the speed of the supply fan will decrease, and the actual cooling capacity will decrease, indicating that the indoor load is reduced. At this time, you can switch to the more energy-efficient fluorine pump cooling mode or mixed cooling mode for cooling. Otherwise, you should exit the fluorine pump cooling mode or mixed cooling mode in advance to ensure sufficient cooling capacity output.

[0049] Therefore, the present application provides a computer room air conditioning control method, which uses the actual indoor and outdoor temperature difference △T to clarify the actual difference between the indoor temperature and the outdoor temperature. It can fully consider the temperature fluctuations on the indoor side and control the switching of the cooling mode through the actual indoor and outdoor temperature difference △T.

[0050] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0051] On the one hand, combined with Figure 1 As shown, this embodiment provides a computer room air conditioner control method, which is applicable to the operation control of the computer room air conditioner, and the computer room air conditioner includes a fluorine pump cooling mode, a compressor cooling mode and a mixed cooling mode.

[0052] The computer room air conditioning control methods include:

[0053] Step S1, determining the actual indoor and outdoor temperature difference ΔT.

[0054] In some possible implementations, combined with Figure 2 As shown, the steps of determining the actual indoor and outdoor temperature difference △T include:

[0055] Step S11, determining the indoor return air temperature detection value Tr and the outdoor inlet air temperature detection value T0.

[0056] Step S12, calculating the difference between the indoor return air temperature detection value Tr and the outdoor inlet air temperature detection value T0, which is the actual indoor and outdoor temperature difference ΔT.

[0057] The indoor return air temperature detection value Tr refers to the temperature detection value of the indoor return air outlet of the computer room air conditioner. Optionally, the indoor return air temperature detection value Tr is the average value of multiple indoor return air temperature detection values ​​in the target time period. Alternatively, the indoor return air temperature detection value Tr is the average value of multiple sensor detection values ​​in the same time period.

[0058] The outdoor air inlet temperature detection value T0 refers to the outdoor air inlet of the computer room air conditioner, or the condenser air inlet temperature detection value. Optionally, the outdoor air inlet temperature detection value T0 takes the average value of multiple outdoor air inlet temperature detection values ​​within the target time period. Alternatively, the outdoor air inlet temperature detection value T0 takes the average value of multiple sensor detection values ​​within the same time period.

[0059] Step S2, determining the first indoor and outdoor temperature difference ΔTfc. The first indoor and outdoor temperature difference ΔTfc is a parameter indicator of whether the computer room air conditioner can switch to the fluorine pump cooling mode. If it is greater than this parameter, it means that the outdoor temperature is low and the computer room air conditioner can absorb enough cooling capacity from the outdoor atmosphere. Optionally, the first indoor and outdoor temperature difference ΔTfc can be a set value or a calculated value.

[0060] Step S3, determining the second indoor and outdoor temperature difference △Tmix. The second indoor and outdoor temperature difference △Tmix is ​​a parameter indicator of whether the computer room air conditioner can switch to the mixed cooling mode. If it is greater than this parameter, it means that the outdoor temperature has a certain cooling capacity, but it is not enough to meet the cooling demand alone. The cooling capacity of the computer room air conditioner is partly taken from the outdoor atmosphere, and the other part is cooled by the compressor, thereby reducing the energy consumption of the compressor as much as possible. Optionally, the second indoor and outdoor temperature difference △Tmix can be a set value or a calculated value.

[0061] Step S4: If the actual indoor and outdoor temperature difference ΔT is greater than the first indoor and outdoor temperature difference ΔTfc, the computer room air conditioner is controlled to enter the fluorine pump cooling mode.

[0062] In the fluorine pump refrigeration mode, only the fluorine pump refrigeration subsystem is turned on (a refrigeration cycle loop consisting of a refrigerant pump (fluorine pump) connected in series with the compressor refrigeration system, and sharing the fluorine system evaporator, condenser, expansion valve, refrigeration accessories and pipelines, which can realize a complete refrigerant cycle and output cooling capacity).

[0063] Step S5: If the actual indoor and outdoor temperature difference ΔT is less than or equal to the first indoor and outdoor entering temperature difference ΔTfc, and the actual indoor and outdoor temperature difference ΔT is greater than the second indoor and outdoor entering temperature difference ΔTmix, the computer room air conditioner is controlled to enter the mixed cooling mode.

[0064] In the mixed refrigeration mode, the multi-system unit can start the fluorine pump refrigeration system and the compressor refrigeration system at the same time.

[0065] Step S6: If the actual indoor and outdoor temperature difference ΔT is less than or equal to the second indoor and outdoor temperature difference ΔTmix, the computer room air conditioner is controlled to enter the compressor cooling mode.

[0066] In the compressor refrigeration mode, only the compressor refrigeration system is turned on (consisting of the compressor, fluorine system evaporator, condenser, expansion valve, DX refrigeration accessories and pipelines, a system that can achieve a complete refrigerant cycle and output cooling capacity).

[0067] The computer room air conditioning control method of the present embodiment is applicable to the switching control among the fluorine pump refrigeration mode, the compressor refrigeration mode and the mixed refrigeration mode. The actual indoor and outdoor temperature difference △T is adopted to clarify the actual difference between the indoor temperature and the outdoor temperature, and the temperature fluctuation on the indoor side can be fully considered. By comparing the actual indoor and outdoor temperature difference △T with the first indoor and outdoor entering temperature difference △Tfc and the second indoor and outdoor entering temperature difference △Tmix, the switching among the fluorine pump refrigeration mode, the compressor refrigeration mode and the mixed refrigeration mode is controlled, which is beneficial to improving the control accuracy of the computer room air conditioning and improving the energy efficiency level of the computer room air conditioning.

[0068] Combination Figure 3 As shown, in some embodiments, the step of determining the first indoor and outdoor entering temperature difference ΔTfc includes:

[0069] Step S7, determining the fan control demand CLF (Cooling Load Factor).

[0070] Step S8, determining a first product of the first coefficient A1 and the blower control demand CLF, and determining the sum of the first product and the first constant B1 as a first indoor and outdoor entering temperature difference ΔTfc.

[0071] In actual applications, the greater the load in the room, the greater the cooling capacity of the unit output is required according to the heat balance. The calculation method of indoor cooling capacity is: cooling capacity = (enthalpy difference of indoor air supply and return) × air volume ≈ (temperature difference of indoor air supply and return) × air volume (sensible heat ratio is close to 1).

[0072] In actual operation, the indoor air supply and return temperature difference is kept constant (operating according to the temperature difference setting value), that is, the cooling capacity is proportional to the air volume. The rated fan speed corresponds to the 100% cooling capacity output of the unit (that is, the computer room is at 100% load). After the air conditioning cooling capacity output matches the computer room load, different fan outputs represent different loads in the computer room. Therefore, the load inside the computer room can be judged according to the fan speed, and the fan speed is controlled by the fan control demand CLF.

[0073] Based on this principle, the fan control demand CLF is introduced and associated with the indoor and outdoor temperature difference under different modes, so that the switching point of the computer room air conditioning cooling mode can be dynamically adjusted in real time.

[0074] Step 8 can also be described as determining the first indoor and outdoor entering temperature difference △Tfc by the following formula (a):

[0075] △Tfc=A1*CLF+B1 (a)

[0076] In the above formula, A1 is the first coefficient and B1 is the first constant.

[0077] Through the above arrangement, the computer room air conditioner can dynamically adjust the first indoor and outdoor entering temperature difference △Tfc according to the actual indoor load situation, so that the mode switching point of the computer room air conditioner is more accurate, further improving the control accuracy and energy efficiency level of the computer room air conditioner.

[0078] In some embodiments, the step of determining the first coefficient A1 includes:

[0079] A first difference between a maximum value and a minimum value of the indoor and outdoor temperature difference that allows entering a fluorine pump cooling mode is determined.

[0080] Determine a second difference between the maximum and minimum values ​​of the blower control demand CLF in the fluorine pump refrigeration mode.

[0081] A ratio of the first difference value to the second difference value is determined as a first coefficient A1.

[0082] In another exemplary embodiment, the first coefficient A1 is determined by the following formula (b):

[0083] A1 = (FC enters the upper boundary of temperature difference - FC enters the lower boundary of temperature difference) / (FC supply fan demand upper limit - FC supply fan demand lower limit) (b)

[0084] In the above formula, the upper boundary of FC temperature difference is the maximum value of the indoor and outdoor temperature difference allowed to enter the fluorine pump cooling mode; the lower boundary of FC temperature difference is the minimum value of the indoor and outdoor temperature difference allowed to enter the fluorine pump cooling mode. The first indoor and outdoor temperature difference △Tfc is within the range of the lower boundary of FC temperature difference and the upper boundary of FC temperature difference. If it exceeds the range, it will be handled as a boundary.

[0085] The FC fan demand upper limit is the maximum value of the fan control demand CLF in the fluorine pump cooling mode; the FC fan demand lower limit is the minimum value of the fan control demand CLF in the fluorine pump cooling mode.

[0086] Among them, the FC entry temperature difference upper boundary and the FC entry temperature difference lower boundary are set values. Optionally, the FC entry temperature difference upper boundary is 30°, and the FC entry temperature difference lower boundary is 20°.

[0087] The FC fan demand upper limit and the FC fan demand lower limit are set values ​​in combination with the equipment performance of the fan of the computer room air conditioner. Optionally, the FC fan demand upper limit is 100%, and the FC fan demand lower limit is greater than 0%.

[0088] In some embodiments, the step of determining the first constant B1 includes:

[0089] Determine the second product of the minimum value of the blower control demand CLF in the fluorine pump cooling mode and the first coefficient A1, and determine the difference between the minimum value of the indoor and outdoor temperature difference allowed to enter the fluorine pump cooling mode and the second product as the first constant B1.

[0090] In another exemplary embodiment, the first constant B1 is determined by the following formula (c):

[0091] B1=FC entry temperature difference lower limit - FC fan demand lower limit * A1 (c)

[0092] Through the above settings, the dynamic adjustment of the first indoor and outdoor temperature difference △Tfc is as follows: Figure 5 As shown, CLF(k) represents the fan control demand CLF at the k-th sampling moment, △Tfc(k) represents the first indoor and outdoor entering temperature difference △Tfc at the k-th sampling moment. It can be seen that the first indoor and outdoor entering temperature difference △Tfc can respond to the change of the fan control demand CLF, thereby dynamically adjusting the mode switching point of the computer room air conditioner, improving the computer room air conditioner entering the fluorine pump cooling mode or exiting the fluorine pump cooling mode, as well as the precise control of the fluorine pump cooling mode and the mixed cooling mode, thereby improving the energy consumption level of the computer room air conditioner.

[0093] Combination Figure 4 As shown, in some embodiments, the step of determining the second indoor and outdoor entry temperature difference ΔTmix includes:

[0094] Step S9, determining the blower control demand CLF.

[0095] Step S10, determining a third product of the second coefficient A2 and the blower control demand CLF, and determining the sum of the third product and the second constant B2 as the second indoor and outdoor entering temperature difference ΔTmix.

[0096] Wherein, step S10 can also be described as determining the second indoor and outdoor entering temperature difference ΔTmix by the following formula (d):

[0097] △Tmix=A2*CLF+B2 (d)

[0098] In the above formula, A2 is the second coefficient, and B2 is the second constant. Through the above arrangement, the computer room air conditioner can dynamically adjust the second indoor and outdoor temperature difference △Tmix according to the actual indoor load conditions, so that the mode switching point of the computer room air conditioner is more accurate, further improving the control accuracy and energy efficiency level of the computer room air conditioner.

[0099] In some embodiments, the step of determining the second coefficient A2 includes: determining a third difference between a maximum value and a minimum value of the indoor and outdoor temperature difference that allows entering the hybrid cooling mode.

[0100] A fourth difference between the maximum value and the minimum value of the blower control demand CLF in the mixed cooling mode is determined.

[0101] The ratio of the third difference value to the fourth difference value is determined as the second coefficient A2.

[0102] In another exemplary embodiment, the second coefficient A2 is determined by the following formula (e):

[0103] A2 = (MIX enters the upper boundary of temperature difference - MIX enters the lower boundary of temperature difference) / (MIX blower demand upper limit

[0104] -MIX fan demand lower limit)(e)

[0105] In the above formula, the upper boundary of MIX entering temperature difference is the maximum value of the indoor and outdoor temperature difference allowed to enter the mixed cooling mode; the lower boundary of MIX entering temperature difference is the minimum value of the indoor and outdoor temperature difference allowed to enter the mixed cooling mode; the second indoor and outdoor entering temperature difference △Tmix is ​​within the range of the lower boundary of MIX entering temperature difference and the upper boundary of MIX entering temperature difference, and will be handled as a boundary if it exceeds the range.

[0106] The upper limit of the MIX fan demand is the maximum value of the fan control demand CLF in the mixed cooling mode; the lower limit of the MIX fan demand is the minimum value of the fan control demand CLF in the mixed cooling mode.

[0107] Wherein, the upper boundary of the temperature difference when MIX enters and the lower boundary of the temperature difference when MIX enters are set values. Optionally, the value of the upper boundary of the temperature difference when MIX enters is 20°, and the value of the upper boundary of the temperature difference when MIX enters is 10°.

[0108] The MIX fan demand upper limit and the MIX fan demand lower limit are set values ​​in combination with the equipment performance of the fan of the computer room air conditioner. Optionally, the MIX fan demand upper limit is 100%, and the MIX fan demand lower limit is greater than 0%.

[0109] In some embodiments, the step of determining the second constant B2 includes:

[0110] The fourth product of the minimum value of the blower control demand CLF in the hybrid cooling mode and the second coefficient A2 is determined, and the difference between the minimum value of the indoor and outdoor temperature difference allowed to enter the hybrid cooling mode and the second product is determined as the second constant B2.

[0111] In another exemplary embodiment, the second constant B2 is determined by the following formula (f):

[0112] B2=MIX enters the lower boundary of temperature difference - MIX fan demand lower limit * A2 (f)

[0113] Through the above settings, the dynamic adjustment process of the second indoor and outdoor temperature difference △Tmix is ​​as follows Figure 6 As shown, CLF(k) represents the fan control demand CLF at the k-th sampling moment, △Tmix(k) represents the second indoor and outdoor entering temperature difference △Tmix at the k-th sampling moment. It can be seen that the second indoor and outdoor entering temperature difference △Tmix can respond to the change of the fan control demand CLF, thereby dynamically adjusting the mode switching point of the computer room air conditioner, improving the computer room air conditioner entering the hybrid cooling mode or exiting the hybrid cooling mode, as well as the precise control of the hybrid cooling mode and the compressor cooling mode, thereby improving the energy consumption level of the computer room air conditioner.

[0114] In some embodiments, the step of determining the blower control demand CLF includes: determining a PID parameter of the blower, and determining the PID parameter of the blower as the blower control demand CLF.

[0115] PID (Proportional Integral Differential) parameters refer to the three parameters of proportion, integration and differential in the control system. They are used to adjust the output of the controller to achieve system stability and performance optimization. It is an important control method in automatic control. The proportional parameter represents the linear relationship between the controller output and the error, which determines the degree of direct response of the controller to the error. A larger proportional parameter will cause the controller to respond more quickly to the error, but may cause overshoot and oscillation. The integral parameter represents the cumulative response of the controller to the error, which can eliminate steady-state errors and improve the stability of the system. A larger integral parameter will cause the controller to respond more strongly to the cumulative error, but may delay the response time of the system and cause oscillation. The differential parameter represents the response of the controller to the rate of change of the error, which can reduce the overshoot of the system and increase the response speed of the system. A larger differential parameter will cause the controller to respond more strongly to the rate of change of the error, but may increase the noise sensitivity of the system. By adjusting the size and proportion of the PID parameters, the performance of the controller can be optimized according to the characteristics and requirements of the system, so that the system can reach the desired state more quickly and stably.

[0116] In another exemplary embodiment, the step of determining the fan control demand CLF includes:

[0117] Determine the indoor supply and return air temperature difference detection value and supply and return air temperature difference setting value; determine the supply air fan control demand CLF by the following formula (g):

[0118] CLF(k)=PID(k) (g)

[0119] In the above formula, PID(k) is the PID parameter at the kth sampling moment, and its value range is [0,100%].

[0120] In some embodiments, the step of determining the PID parameters of the blower includes:

[0121] Determine a first ratio of the blower temperature difference control proportional parameter Kp and the blower temperature difference control period T; determine the fifth product of the first ratio and the deviation e(k) between the supply and return air temperature difference detection value at the kth sampling moment and the supply and return air temperature difference setting value.

[0122] Determine the second ratio of the blower temperature difference control period T and the blower temperature difference control integral coefficient Ti; determine the sixth product of the second ratio and the sum of the deviations of the supply and return air temperature difference detection values ​​from the 0th to the kth sampling moments and the supply and return air temperature difference setting values.

[0123] Determine the third ratio of the temperature difference control differential coefficient Td of the supply fan and the temperature difference control period T of the supply fan; determine the fifth difference between the deviation e(k) of the supply and return air temperature difference detection value at the kth sampling moment and the supply and return air temperature difference setting value and the deviation e(k-1) of the supply and return air temperature difference detection value at the k-1th sampling moment and the supply and return air temperature difference; determine the seventh product of the third ratio and the fifth difference.

[0124] The sum of the fifth product, the sixth product and the seventh product is determined as the PID parameter of the blower.

[0125] In another exemplary embodiment, the PID parameters of the blower are determined by the following formula (h):

[0126]

[0127] In the above formula, e(k) is the deviation between the supply and return air temperature difference detection value at the kth sampling moment and the supply and return air temperature difference setting value; e(k-1) is the deviation between the supply and return air temperature difference detection value at the k-1th sampling moment and the supply and return air temperature difference; Kp is the supply fan temperature difference control proportional coefficient; Ti is the supply fan temperature difference control integral coefficient; Td is the supply fan temperature difference control differential coefficient; T is the supply fan temperature difference control period, in seconds.

[0128] Through the above settings, the supply air fan control demand CLF at a certain sampling moment can be determined according to the difference between the supply and return air temperature difference detection value (supplier and return air temperature difference detection value = return air temperature detection value - supply air temperature detection value) and the supply and return air temperature difference setting value (supplier and return air temperature difference setting value = return air temperature setting value - supply air temperature setting value), and then the first indoor and outdoor entering temperature difference △Tfc and the second indoor and outdoor entering temperature difference △Tmix can be dynamically adjusted, and the mode switching point of the computer room air conditioner can be dynamically adjusted in real time to improve the control accuracy and energy efficiency level of the computer room air conditioner.

[0129] On the other hand, combined Figure 7 As shown, this embodiment provides a computer room air conditioning control device, which is used to implement the computer room air conditioning control method of the present application.

[0130] The computer room air conditioning control device of this embodiment adopts the computer room air conditioning control method of this application and has all the beneficial technical effects of this application.

[0131] Combination Figure 7 As shown, in some embodiments, the computer room air conditioning control device includes:

[0132] The first determination module 1 is used to determine the actual indoor and outdoor temperature difference △T. The first determination module 1 determines the actual indoor and outdoor temperature difference △T by calculating the difference between the indoor return air temperature detection value Tr and the outdoor inlet air temperature detection value T0. The indoor return air temperature detection value Tr and the outdoor inlet air temperature detection value T0 can be detected by sensors or obtained by other functional modules.

[0133] The second determination module 2 determines the first indoor and outdoor entering temperature difference △Tfc. Optionally, the first indoor and outdoor entering temperature difference △Tfc is a set value, and the second determination module 2 receives an external input instruction, or receives an input instruction from other devices to determine the first indoor and outdoor entering temperature difference △Tfc. Alternatively, the first indoor and outdoor entering temperature difference △Tfc is a calculated value, and the second determination module 2 receives parameters such as the blower control demand CLF, and determines the first indoor and outdoor entering temperature difference △Tfc through calculation.

[0134] The third determination module 3 determines the second indoor and outdoor temperature difference △Tmix. Optionally, the second indoor and outdoor temperature difference △Tmix is ​​a set value, and the third determination module 3 receives an external input command, or receives an input command from other devices to determine the second indoor and outdoor temperature difference △Tmix. Alternatively, the second indoor and outdoor temperature difference △Tmix is ​​a calculated value, and the third determination module 3 receives parameters such as the fan control demand CLF, and determines the second indoor and outdoor temperature difference △Tmix by calculation.

[0135] Control module 4 is used to control the computer room air conditioner to enter the fluorine pump cooling mode when the actual indoor and outdoor temperature difference △T is greater than the first indoor and outdoor entering temperature difference △Tfc; control the computer room air conditioner to enter the mixed cooling mode when the actual indoor and outdoor temperature difference △T is less than or equal to the first indoor and outdoor entering temperature difference △Tfc, and the actual indoor and outdoor temperature difference △T is greater than the second indoor and outdoor entering temperature difference △Tmix; control the computer room air conditioner to enter the compressor cooling mode when the actual indoor and outdoor temperature difference △T is less than or equal to the second indoor and outdoor entering temperature difference △Tmix.

[0136] The computer room air conditioning control device of the present embodiment is suitable for the switching control among the fluorine pump refrigeration mode, the compressor refrigeration mode and the mixed refrigeration mode. The actual indoor and outdoor temperature difference △T is adopted to clarify the actual difference between the indoor temperature and the outdoor temperature, and the temperature fluctuation on the indoor side can be fully considered. By comparing the actual indoor and outdoor temperature difference △T with the first indoor and outdoor entering temperature difference △Tfc and the second indoor and outdoor entering temperature difference △Tmix, the switching among the fluorine pump refrigeration mode, the compressor refrigeration mode and the mixed refrigeration mode is controlled, which is beneficial to improving the control accuracy of the computer room air conditioning and improving the energy efficiency level of the computer room air conditioning.

[0137] In some embodiments, the computer room air conditioning control device further includes: a fourth determination module 5, which is used to determine the PID parameters of the air supply fan, and determine the PID parameters of the air supply fan as the air supply fan control demand CLF.

[0138] Optionally, the fourth determination module 5 determines the fan control demand CLF by the following formula (g) and formula (h):

[0139] CLF(k)=PID(k) (g)

[0140]

[0141] In the above formula, PID(k) is the PID parameter at the kth sampling time, and its value range is [0,100%]. e(k) is the deviation between the supply and return air temperature difference detection value at the kth sampling time and the supply and return air temperature difference setting value; e(k-1) is the deviation between the supply and return air temperature difference detection value at the k-1th sampling time and the supply and return air temperature difference; Kp is the supply fan temperature difference control proportional coefficient; Ti is the supply fan temperature difference control integral coefficient; Td is the supply fan temperature difference control differential coefficient; T is the supply fan temperature difference control cycle, in seconds.

[0142] Through the above settings, the control device can determine the supply air fan control demand CLF at a certain sampling moment according to the difference between the supply and return air temperature difference detection value (supply and return air temperature difference detection value = return air temperature detection value - supply air temperature detection value) and the supply and return air temperature difference setting value (supply and return air temperature difference setting value = return air temperature setting value - supply air temperature setting value), and then dynamically adjust the first indoor and outdoor entering temperature difference △Tfc and the second indoor and outdoor entering temperature difference △Tmix, and dynamically adjust the mode switching point of the computer room air conditioner in real time to improve the control accuracy and energy efficiency level of the computer room air conditioner.

[0143] In some embodiments, the second determination module 2 in the computer room air conditioning control device is also used to obtain the fan control demand CLF, and determine the first product of the first coefficient A1 and the fan control demand CLF, and determine the sum of the first product and the first constant B1 as the first indoor and outdoor entering temperature difference △Tfc.

[0144] Optionally, the second determination module 2 determines the first indoor and outdoor entering temperature difference ΔTfc by the following formulas (a), (b) and (c):

[0145] △Tfc=A1*CLF+B1 (a)

[0146] A1 = (FC enters the upper boundary of temperature difference - FC enters the lower boundary of temperature difference) / (FC supply fan demand upper limit - FC supply fan demand lower limit) (b)

[0147] B1=FC entry temperature difference lower limit - FC fan demand lower limit * A1 (c)

[0148] In the above formula, A1 is the first coefficient and B1 is the first constant.

[0149] The FC entry temperature difference upper boundary is the maximum value of the indoor and outdoor temperature difference allowed to enter the fluorine pump cooling mode; the FC entry temperature difference lower boundary is the minimum value of the indoor and outdoor temperature difference allowed to enter the fluorine pump cooling mode; the FC fan demand upper limit is the maximum value of the fan control demand CLF under the fluorine pump cooling mode; the FC fan demand lower limit is the minimum value of the fan control demand CLF under the fluorine pump cooling mode.

[0150] Through the above configuration, the computer room air conditioning control device of this embodiment can be Figure 5 As shown, the first indoor and outdoor entering temperature difference △Tfc is dynamically adjusted. The first indoor and outdoor entering temperature difference △Tfc can respond to the change of the blower control demand CLF, thereby dynamically adjusting the mode switching point of the computer room air conditioner, improving the computer room air conditioner entering the fluorine pump refrigeration mode or exiting the fluorine pump refrigeration mode, and the precise control of the fluorine pump refrigeration mode and the mixed refrigeration mode, thereby improving the energy consumption level of the computer room air conditioner.

[0151] In some embodiments, the third determination module 3 in the computer room air conditioning control device is also used to obtain the fan control demand CLF, and determine the third product of the second coefficient A2 and the fan control demand CLF, and determine the sum of the third product and the second constant B2 as the second indoor and outdoor entering temperature difference △Tmix.

[0152] Optionally, the third determination module 3 determines the second indoor and outdoor entering temperature difference ΔTmix by the following formulas (d), (e) and (f):

[0153] △Tmix=A2*CLF+B2 (d)

[0154] A2 = (MIX enters the upper boundary of temperature difference - MIX enters the lower boundary of temperature difference) / (MIX blower demand upper limit

[0155] -MIX fan demand lower limit)(e)

[0156] B2=MIX enters the lower boundary of temperature difference - MIX fan demand lower limit * A2 (f)

[0157] In the above formula, A2 is the second coefficient and B2 is the second constant.

[0158] The upper boundary of the MIX indoor and outdoor temperature difference is the maximum value of the indoor and outdoor temperature difference allowed to enter the mixed cooling mode; the lower boundary of the MIX indoor and outdoor temperature difference is the minimum value of the indoor and outdoor temperature difference allowed to enter the mixed cooling mode; the upper limit of the MIX fan demand is the maximum value of the fan control demand CLF in the mixed cooling mode; the lower limit of the MIX fan demand is the minimum value of the fan control demand CLF in the mixed cooling mode.

[0159] Through the above configuration, the computer room air conditioning control device of this embodiment can be Figure 6 As shown, the second indoor and outdoor entering temperature difference △Tmix is ​​dynamically adjusted. The second indoor and outdoor entering temperature difference △Tmix can respond to the change of the blower control demand CLF, thereby dynamically adjusting the mode switching point of the computer room air conditioner, improving the computer room air conditioner entering or exiting the mixed cooling mode, and accurately controlling the mixed cooling mode and the compressor cooling mode, thereby improving the energy consumption level of the computer room air conditioner.

[0160] On the other hand, combined Figure 8 As shown, this embodiment provides a computer room air conditioner, which adopts the control method of the present application, or the control device 100 of the present application.

[0161] The computer room air conditioner of this embodiment adopts the control method or control device 100 of the present application, has all the beneficial technical effects of the present application, and has a better energy efficiency level.

[0162] refer to Figure 8 As shown, in some embodiments, the computer room air conditioner includes: a fluorine pump refrigeration system 300 and a compressor refrigeration system 200; in the fluorine pump refrigeration mode, the fluorine pump refrigeration system 300 is running, the compressor refrigeration system 200 is shut down, and the computer room air conditioner makes full use of the natural cold source; in the compressor refrigeration mode, the compressor refrigeration system 200 is running, and the fluorine pump refrigeration system 300 is shut down; in the mixed refrigeration mode, the fluorine pump refrigeration system 300 and the compressor refrigeration system 200 are running at the same time. The computer room air conditioner also includes a plurality of sensors 400 for detecting the indoor return air temperature detection value Tr, the outdoor inlet air temperature detection value T0, the indoor return air temperature, the indoor supply air temperature, etc. The sensors 400 are respectively electrically connected to the control device 100 to transmit the detection data to the control device 100.

[0163] In one possible implementation, the solution shown in the embodiment of the present application can provide cloud technology services. For example, the computer room shown in the embodiment of the present application can provide cooling function for cloud devices. For example, the data center in the above embodiment can be a data center running based on cloud technology.

[0164] In one possible implementation, the solution shown in the embodiment of the present application can be implemented in combination with cloud technology. For example, the above-mentioned control device can be implemented as a server, wherein the server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks, as well as big data and artificial intelligence platforms.

[0165] Alternatively, the configuration information in the scheme shown in the embodiment of the present application, such as the above-mentioned emergency start-up strategy and duration configuration information, can be obtained by the configuration device after the user's configuration is generated, uploaded to the cloud, obtained from the cloud by the control device, and configured to the air-conditioning compressor.

[0166] On the other hand, combined Fig. 9 As shown, this embodiment provides a computer device 1000, which includes a processor and a memory. The memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the computer room air conditioning control method of the present application.

[0167] The computer device 1000 includes a central processing unit 1001 (CPU), a system memory 1004 including a random access memory 1002 (RAM) and a read only memory 1003 (ROM), and a system bus 1005 connecting the system memory 1004 and the central processing unit 1001. Optionally, the computer device 1000 also includes a basic input / output system for facilitating information transmission between various components in the computer, and a large-capacity storage device 1007 for storing an operating system 1008, application programs 1009 and other program modules 1010.

[0168] The mass storage device 1007 is connected to the central processing unit 1001 via a mass storage controller (not shown) connected to the system bus 1005. The mass storage device 1007 and its associated computer readable medium provide non-volatile storage for the computer device 1000. That is, the mass storage device 1007 may include a computer readable medium (not shown) such as a hard disk or a Compact Disc-Read Only Memory (CD-ROM) drive.

[0169] Optionally, the computer readable medium may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer readable instructions, data structures, program modules or other data. Computer storage media include RAM, ROM, flash memory or other solid-state storage technologies, CD-ROM, or other optical storage, cassettes, magnetic tapes, disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that the computer storage media is not limited to the above. The above-mentioned system memory and mass storage device can be collectively referred to as memory.

[0170] The computer device can be connected to the Internet or other network devices through a network interface unit connected to the system bus.

[0171] The memory also includes one or more programs, which are stored in the memory. The central processing unit implements all or part of the steps of the diagram or the method shown in the diagram by executing the one or more programs.

[0172] A person skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, which can be a computer-readable storage medium contained in the memory in the above embodiments; or a computer-readable storage medium that exists independently and is not installed in the terminal. The computer-readable storage medium stores at least one computer program, which is loaded and executed by the processor to implement the methods described in the above embodiments of the present application.

[0173] Optionally, the computer-readable storage medium may include: a read-only memory, a random access memory, a solid-state hard disk or an optical disk, etc. The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0174] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0175] In an exemplary embodiment, a computer program product or a computer program is also provided, the computer program, product or computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods described in the above embodiments.

[0176] In the description of this specification, the reference terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application.

[0177] The above description is only an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A computer room air conditioning control method, characterized in that: Applicable to the operation control of the computer room air conditioner, which includes a fluorine pump refrigeration mode, a compressor refrigeration mode and a mixed refrigeration mode; The computer room air conditioning control method comprises: Determine the actual temperature difference between indoor and outdoor △T; Determine the first indoor and outdoor entering temperature difference △Tfc; Determine the second indoor and outdoor entry temperature difference △Tmix; If the actual indoor and outdoor temperature difference ΔT is greater than the first indoor and outdoor entry temperature difference ΔTfc, controlling the computer room air conditioner to enter the fluorine pump cooling mode; If the actual indoor and outdoor temperature difference ΔT is less than or equal to the first indoor and outdoor entry temperature difference ΔTfc, and the actual indoor and outdoor temperature difference ΔT is greater than the second indoor and outdoor entry temperature difference ΔTmix, then control the computer room air conditioner to enter the mixed cooling mode; If the actual indoor and outdoor temperature difference ΔT is less than or equal to the second indoor and outdoor temperature difference ΔTmix, the computer room air conditioner is controlled to enter a compressor cooling mode.

2. The computer room air conditioning control method according to claim 1, characterized in that: The step of determining the actual indoor and outdoor temperature difference ΔT comprises: Determine the indoor return air temperature detection value Tr and the outdoor inlet air temperature detection value T0; The difference between the indoor return air temperature detection value Tr and the outdoor inlet air temperature detection value T0 is calculated to be the actual indoor and outdoor temperature difference ΔT.

3. The computer room air conditioning control method according to claim 1 or 2, characterized in that: The step of determining the first indoor and outdoor entering temperature difference ΔTfc comprises: Determine the fan control demand CLF; A first product of a first coefficient A1 and the blower control demand CLF is determined, and a sum of the first product and a first constant B1 is determined as the first indoor and outdoor entering temperature difference ΔTfc.

4. The computer room air conditioning control method according to claim 3, characterized in that: The step of determining the first coefficient A1 comprises: Determine a first difference between a maximum value and a minimum value of the indoor and outdoor temperature difference that allows entering the fluorine pump cooling mode; Determine a second difference between the maximum value and the minimum value of the blower control demand CLF in the fluorine pump refrigeration mode; The ratio of the first difference to the second difference is determined as the first coefficient A1.

5. The computer room air conditioning control method according to claim 4, characterized in that: The step of determining the first constant B1 comprises: Determine the second product of the minimum value of the blower control demand CLF in the fluorine pump refrigeration mode and the first coefficient A1, and determine the difference between the minimum value of the indoor and outdoor temperature difference allowed to enter the fluorine pump refrigeration mode and the second product as the first constant B1.

6. The computer room air conditioning control method according to any one of claims 1 to 5, characterized in that: The step of determining the second indoor and outdoor entry temperature difference ΔTmix comprises: Determine the fan control demand CLF; A third product of the second coefficient A2 and the blower control demand CLF is determined, and the sum of the third product and the second constant B2 is determined as the second indoor and outdoor entering temperature difference ΔTmix.

7. The computer room air conditioning control method according to claim 6, characterized in that: The step of determining the second coefficient A2 comprises: determining a third difference between the maximum value and the minimum value of the indoor and outdoor temperature difference that allows entering the hybrid cooling mode; Determining a fourth difference between a maximum value and a minimum value of the blower control demand CLF in the mixed cooling mode; A ratio of the third difference to the fourth difference is determined as the second coefficient A2.

8. The computer room air conditioning control method according to claim 7, characterized in that: The step of determining the second constant B2 comprises: Determine the fourth product of the minimum value of the blower control demand CLF in the hybrid cooling mode and the second coefficient A2, and determine the difference between the minimum value of the indoor and outdoor temperature difference allowed to enter the hybrid cooling mode and the second product as the second constant B2.

9. The computer room air conditioning control method according to any one of claims 3 to 8, characterized in that: The step of determining the fan control demand CLF comprises: Determine PID parameters of the air supply fan, and determine the PID parameters of the air supply fan as the air supply fan control demand CLF.

10. The computer room air conditioning control method according to claim 9, characterized in that: The step of determining the PID parameters of the blower comprises: Determine a first ratio of a temperature difference control proportional parameter Kp of the blower and a temperature difference control period T of the blower; determine a fifth product of the first ratio and a deviation e(k) between the supply and return air temperature difference detection value at the kth sampling moment and the supply and return air temperature difference setting value; Determine a second ratio of the blower temperature difference control period T and the blower temperature difference control integral coefficient Ti; determine a sixth product of the second ratio and the sum of the deviations of the supply and return air temperature difference detection values ​​from the 0th to the kth sampling moments and the supply and return air temperature difference setting values; Determine a third ratio of the temperature difference control differential coefficient Td of the blower and the temperature difference control period T of the blower; determine a fifth difference between the deviation e(k) of the supply-return air temperature difference detection value at the kth sampling moment and the supply-return air temperature difference setting value and the deviation e(k-1) of the supply-return air temperature difference detection value at the k-1th sampling moment and the supply-return air temperature difference; determine a seventh product of the third ratio and the fifth difference; The sum of the fifth product, the sixth product and the seventh product is determined as the PID parameter of the blower.

11. A computer room air conditioning control device, characterized in that: The computer room air conditioning control device is used to implement the computer room air conditioning control method described in any one of claims 1 to 10; The computer room air conditioning control device comprises: The first determination module is used to determine the actual temperature difference ΔT between indoor and outdoor; The second determination module determines a first indoor and outdoor entering temperature difference ΔTfc; The third determination module determines the second indoor and outdoor entry temperature difference △Tmix; A control module is used to control the computer room air conditioner to enter the fluorine pump cooling mode when the actual indoor and outdoor temperature difference △T is greater than the first indoor and outdoor entering temperature difference △Tfc; control the computer room air conditioner to enter the mixed cooling mode when the actual indoor and outdoor temperature difference △T is less than or equal to the first indoor and outdoor entering temperature difference △Tfc, and the actual indoor and outdoor temperature difference △T is greater than the second indoor and outdoor entering temperature difference △Tmix; control the computer room air conditioner to enter the compressor cooling mode when the actual indoor and outdoor temperature difference △T is less than or equal to the second indoor and outdoor entering temperature difference △Tmix.

12. The computer room air conditioning control device according to claim 11, characterized in that: The computer room air conditioning control device also includes: The fourth determination module is used to determine the PID parameters of the air supply fan, and determine the PID parameters of the air supply fan as the air supply fan control demand CLF.

13. The computer room air conditioning control device according to claim 12, characterized in that: The second determination module is further used to obtain the fan control demand CLF, and determine a first product of a first coefficient A1 and the fan control demand CLF, and determine the sum of the first product and a first constant B1 as the first indoor and outdoor entering temperature difference ΔTfc.

14. The computer room air conditioning control device according to claim 12, characterized in that: The third determination module is further used to obtain the fan control demand CLF, and determine a third product of the second coefficient A2 and the fan control demand CLF, and determine the sum of the third product and the second constant B2 as the second indoor and outdoor entering temperature difference ΔTmix.

15. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the computer room air conditioning control method according to any one of claims 1 to 10.

16. A storage medium, characterized in that: The storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the computer room air conditioning control method according to any one of claims 1 to 10.

17. A computer room air conditioner, characterized in that: The computer room air conditioner adopts the control method described in any one of claims 1 to 10, or the control device described in any one of claims 11 to 14.

18. The computer room air conditioner according to claim 17, characterized in that: The machine room air conditioner comprises: a fluorine pump refrigeration system and a compressor refrigeration system; In the fluorine pump refrigeration mode, the fluorine pump refrigeration system runs and the compressor refrigeration system stops; in the compressor refrigeration mode, the compressor refrigeration system runs and the fluorine pump refrigeration system stops; in the mixed refrigeration mode, the fluorine pump refrigeration system and the compressor refrigeration system run simultaneously.

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