Precision air conditioning control method, device, equipment and readable storage medium

Abstract

The present invention provides a precision air conditioning control method, device, equipment and readable storage medium, the precision air conditioning control method comprising: increasing the speed of each internal fan step by step, if the superheat gain value of the unit is less than the preset value after the speed of any internal fan is increased, restoring the speed of the internal fan to the speed before the increase, and determining that the internal fan is in a saturated working condition; adjusting each internal fan to a saturated working condition. By adjusting the speed of each internal fan step by step, and using the superheat gain value of the unit for judgment and selection, the speed of each internal fan can be gradually adjusted to a speed that no longer increases the cooling capacity of the unit, that is, the current speed can fully utilize the cooling capacity of the refrigerant in the corresponding area, or until the internal fan is adjusted to the maximum limit speed, so that the fan can maximize the cooling capacity of the refrigerant in the corresponding area, and ultimately, greatly improve the cooling capacity of the precision air conditioner.

Description

Technical Field

[0001] The present invention relates to the field of data processing, and in particular to a precision air conditioning control method, device, equipment and readable storage medium. Background Art

[0002] In the actual engineering application of precision air conditioning in data centers, in order to improve energy efficiency, thermal management methods such as closed cold channels and closed hot channels are usually adopted.

[0003] At present, there are a large number of cabinets in data centers, and the precision air conditioners between the cabinets have a fixed structure, which is called air-cooled row-to-row precision air conditioners or back-plate precision air conditioners; this type of precision air conditioners generally have multiple internal fans; this type of precision air conditioners has a complex and compact structure. In actual use, one or more reasons often lead to uneven distribution of refrigerant in the evaporator, resulting in insufficient flow capacity of some internal fans and excess refrigerant in some flow paths, which leads to the cooling capacity of some flow paths not being fully utilized, resulting in energy waste. Summary of the Invention

[0004] The main purpose of the present invention is to provide a precision air conditioning control method, device, equipment and readable storage medium, aiming to solve the problem that some refrigerants in precision air conditioners used in data centers are not fully utilized due to uneven distribution of refrigerants.

[0005] In a first aspect, the present invention provides a precision air conditioning control method, which adopts the following technical solution.

[0006] A precision air conditioning control method, comprising:

[0007] Increase the speed of each internal fan step by step. If the superheat gain value of the unit is less than the preset value after the speed of any internal fan is increased, restore the speed of the internal fan to the speed before the speed increase, and determine that the internal fan is in a saturated operating condition.

[0008] Adjust each internal fan to saturation condition.

[0009] In some embodiments, the step of gradually increasing the rotation speed of each internal fan includes:

[0010] On the basis of the initial speed, the speed of the multiple internal fans to be adjusted is increased one by one according to the preset speed increase ratio, wherein one round of speed increase of the multiple internal fans to be adjusted one by one is considered as one round of speed increase, and the speed of the internal fans is increased step by step according to the preset speed increase ratio.

[0011] In some embodiments, during the acceleration process:

[0012] If the superheat gain value of the unit is greater than the preset value after any internal fan speed is increased, the internal fan will participate in the next round of speed increase based on the current speed;

[0013] If the superheat gain value of any internal fan is less than the preset value after the speed is increased from the initial speed, it will participate in the next round of speed increase based on the initial speed;

[0014] If the superheat gain value of the corresponding unit is less than the preset value after any internal fan increases from a non-initial speed, it is determined that the internal fan is in a saturated operating condition and no longer participates in subsequent speed increases.

[0015] In some embodiments, during the acceleration process:

[0016] Each time a round of speed increase is completed, the number of rotations is accumulated, and before the next round of speed increase is performed, it is determined whether the accumulated number of rotations is greater than the preset number;

[0017] If it is less than, proceed to the next round of speed increase;

[0018] If it is not less than, end the speed adjustment of each internal fan.

[0019] In some embodiments, based on the initial speed, the speed of an internal fan to be adjusted is increased multiple times according to a preset speed increase ratio, and the internal fan is adjusted to a saturated operating condition, and then the other internal fans are adjusted to a saturated operating condition one by one.

[0020] In some embodiments, before the speed-up process, the method further includes:

[0021] Determine whether the unit is in a stable operating state;

[0022] If it is in a stable operating state, the control unit enters the soft lock mode and adjusts the speed of each internal fan; wherein, when the unit is in the soft lock mode, the compressor, electronic expansion valve, and external fan do not respond to PI control.

[0023] In some embodiments, during the speed-up process, if the unit is in an unstable operating state, the unit is controlled to exit the soft lock mode and the speed adjustment of each internal fan is terminated.

[0024] In a second aspect, the present invention further provides a precision air conditioning control device, which adopts the following technical solution:

[0025] A control module is configured to gradually increase the speed of each internal fan. If, after the speed of any internal fan is increased, the overheat gain value of the unit is less than a preset value, the speed of the internal fan is restored to the speed before the speed increase, and the internal fan is determined to be in a saturated operating condition.

[0026] The calculation module is used to obtain the superheat gain value of the unit.

[0027] In a third aspect, the present invention also provides a precision air conditioning control device, which adopts the following technical solution

[0028] A precision air conditioning control device comprises a processor, a memory, and a precision air conditioning control program stored in the memory and executable by the processor, wherein when the precision air conditioning control program is executed by the processor, the steps of the precision air conditioning control method as described above are implemented.

[0029] In a fourth aspect, the present invention further provides a readable storage medium, which adopts the following technical solution

[0030] A readable storage medium stores a precision air conditioning control program, wherein when the precision air conditioning control program is executed by a processor, the steps of the precision air conditioning control method described above are implemented.

[0031] The present invention gradually adjusts the rotation speed of each internal fan to a rotation speed that no longer increases the cooling capacity of the unit by adjusting the rotation speed of each internal fan step by step in the embodiment of the present invention, and uses the superheat gain value of the unit for judgment and selection, that is, the current rotation speed can fully exert the cooling capacity of the refrigerant in the corresponding area, or until the internal fan is adjusted to the maximum limit speed, so that the fan can maximize the cooling capacity of the refrigerant in the corresponding area, and ultimately, greatly improve the cooling capacity of the precision air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the hardware structure of the precision air conditioning control device involved in the embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the flow of the precision air conditioning control method of the present invention;

[0034] Figure 3 Schematic diagram of the functional modules of the precision air conditioning control device of the present invention.

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] In a first aspect, an embodiment of the present invention provides a precision air conditioning control device, which may be a device with data processing capabilities, such as a personal computer (PC), a notebook computer, or a server.

[0038] Reference Figure 1 , Figure 1This is a schematic diagram of the hardware structure of the precision air-conditioning control device involved in the embodiment of the present invention. In the embodiment of the present invention, the precision air-conditioning control device may include a processor 1001 (such as a central processing unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a wireless interface (such as wireless fidelity WIreless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM), or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001. Those skilled in the art will understand that, Figure 1 The hardware structure shown in the figure does not constitute a limitation of the present invention, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0039] Continue to refer to Figure 1 , Figure 1 The memory 1005, which is a computer storage medium, may include an operating system, a network communication module, a user interface module, and a precision air conditioning control program. The processor 1001 may call the precision air conditioning control program stored in the memory 1005 and execute the precision air conditioning control method provided in the embodiment of the present invention.

[0040] In a second aspect, an embodiment of the present invention provides a precision air conditioning control method.

[0041] Reference Figure 2 , a precision air conditioning control method provided by an embodiment of the present invention, comprising:

[0042] S100, gradually increasing the speed of each internal fan. If the superheat gain value of the unit is less than a preset value after the speed of any internal fan is increased, the speed of the internal fan is restored to the speed before the speed increase, and the internal fan is determined to be in a saturated operating condition.

[0043] S200, adjust each internal fan to saturation condition.

[0044] Among them, the superheat gain value of the unit is the difference in the superheat of the unit calculated before and after the internal fan speed is increased, reflecting the impact of the unit's cooling effect after a certain internal fan speed adjustment. The preset value is set in advance by the technicians, and the specific value is determined by the technicians according to relevant needs.

[0045] At the same time, in this embodiment, when using the unit's superheat to judge the unit's cooling effect, the unit's superheat is obtained after the speed of any internal fan increases and after a preset first time interval, and is compared and subtracted from the unit's superheat before the internal fan speed increase. The corresponding practical significance is that the first time interval allows the unit's cooling effect sufficient time to adapt after the fan speed increase, ensuring that the change in cooling effect caused by the change in the internal fan speed can be fully detected. In addition, after any internal fan returns to its speed before the speed increase, a preset second time interval is required before rotating to another internal fan to allow the unit to return to its initial state and stabilize before detecting and judging the next internal fan.

[0046] Furthermore, when a certain internal fan corresponds to a region with a large amount of refrigerant and has a relatively large surplus of cooling capacity at the initial speed of the internal fan, the cooling capacity of the refrigerant in that region can be further utilized by increasing the speed of the internal fan, effectively reducing resource waste. It is worth noting that if the speed of any internal fan increases to its maximum speed limit, and each increase in speed satisfies the superheat gain value of the unit greater than the preset value, the speed of the internal fan will stop increasing after reaching the maximum speed limit, and the internal fan will be considered to be in saturation condition when it is at the maximum speed limit.

[0047] Therefore, the key points of the present invention are that by adjusting the speed of each internal fan step by step and using the superheat gain value of the unit for judgment and selection, the speed of each internal fan can be gradually adjusted to a speed that no longer increases the cooling capacity of the unit, that is, the current speed can fully utilize the cooling capacity of the refrigerant in the corresponding area, or until the internal fan is adjusted to the maximum limit speed, so that the fan can maximize the cooling capacity of the refrigerant in the corresponding area, and ultimately, greatly improve the cooling capacity of the precision air conditioner.

[0048] Furthermore, during the speed increase process, if the unit is in an unstable operating state, the unit is controlled to exit the soft lock mode and the speed adjustment of each internal fan is terminated.

[0049] Specifically, if M≤[P(n+1)-P(n)] / P(n) or [P(n+1)-P(n)] / P(n)≤-M, the unit is said to be in an unstable operating state. At this time, the speed adjustment of each internal fan is terminated, and the M value is set by the technician according to needs.

[0050] Furthermore, when the unit is operating unstably, the unit can be restored to a state where each component can respond smoothly to PI control, so that the unit can smoothly adjust its state.

[0051] Furthermore, in some embodiments, when any alarm signal is issued or the unit's startup parameters change, the unit is controlled to exit soft lock mode and terminate speed adjustment of each internal fan. This allows each unit component to respond promptly to PI control when the unit's operating conditions change, ensuring stable operation of the unit.

[0052] Furthermore, the step S100 of gradually increasing the rotation speed of each internal fan includes:

[0053] On the basis of the initial speed, the speed of the multiple internal fans to be adjusted is increased one by one according to the preset speed increase ratio, wherein one round of speed increase of the multiple internal fans to be adjusted one by one is considered as one round of speed increase, and the speed of the internal fans is increased step by step according to the preset speed increase ratio.

[0054] In this embodiment, each internal fan is accelerated according to the same preset acceleration ratio, and the preset acceleration ratio is consistent during multiple rounds of acceleration, effectively simplifying the acceleration process for all internal fans. However, it is understood that in other embodiments, the preset acceleration ratios of different internal fans within the same round and of internal fans in different rounds can be adjusted according to actual needs, and this is not limited here.

[0055] With this arrangement, the speed of different internal fans is adjusted one by one, and after the adjustment, it is determined whether the overheat gain of the unit can meet the preset value, thereby achieving the effect of a single variable and accurately knowing whether a certain internal fan can improve the cooling capacity of the unit after the speed increase. At the same time, in one round of speed increase, multiple internal fans are adjusted once, ensuring that all internal fans can be judged relatively quickly, effectively avoiding the problem of taking a long time to adjust all internal fans when multiple speed increases are performed on a single internal fan. It can also more quickly find a certain internal fan that can provide the cooling capacity of the unit, that is, more quickly improve the cooling capacity of the unit. And in subsequent multiple rounds of speed increase, the internal fan is gradually adjusted to the speed state with the highest cooling capacity.

[0056] Furthermore, since the refrigerant distribution within the unit is in a dynamic process during operation, that is, the refrigerant in some areas may be in excess at different times, for an internal fan that does not experience a unit superheat gain during a certain round of speed increase, it may still experience a significant unit superheat gain during the next round of speed increase. Based on this issue, the embodiment of the present invention further implements the following during the speed increase process:

[0057] If the superheat gain value of the unit is greater than the preset value after any internal fan speed is increased, the internal fan will participate in the next round of speed increase based on the current speed;

[0058] If the superheat gain value of any internal fan is less than the preset value after the speed is increased from the initial speed, it will participate in the next round of speed increase based on the initial speed;

[0059] If the superheat gain value of the corresponding unit is less than the preset value after any internal fan increases from a non-initial speed, it is determined that the internal fan is in a saturated operating condition and no longer participates in subsequent speed increases.

[0060] With this arrangement, even if the internal fan does not increase the cooling capacity of the unit after increasing the speed from the initial speed in the current round, it can participate in the speed increase again in the next round. Furthermore, during any round of speed increase, if there is excess refrigerant in the area corresponding to the internal fan, it can be successfully discovered and the corresponding internal fan in the area can be adjusted at least once, ultimately achieving the goal of adjusting each internal fan to the state of maximizing the cooling capacity of the unit.

[0061] In some preferred embodiments, before the speed-up process, the method further includes:

[0062] Determine whether the unit is in a stable operating state;

[0063] If it is in a stable operating state, the control unit enters the soft lock mode and adjusts the speed of each internal fan; wherein, when the unit is in the soft lock mode, the compressor, electronic expansion valve, and external fan do not respond to PI control.

[0064] This setting allows the unit to start adjusting the speed of each internal fan after it is in a stable state and enters the soft lock mode, thereby minimizing the impact of other components of the unit on the superheat of the unit, and effectively determining that the superheat gain brought about by the increase in speed of each internal fan is the result of the increase in speed of the internal fan.

[0065] Among them, the specific process of judging whether the unit is in a stable operating state is to periodically obtain the core parameter package P of the system, including exhaust pressure Pc, suction pressure Pe, exhaust temperature Tp, exhaust superheat TDsh (saturation temperature corresponding to exhaust temperature minus condensing pressure), and suction superheat Dsh (saturation temperature corresponding to suction temperature minus evaporation pressure); after obtaining these core parameter packages, record them as P(n), after an interval of t time, and after recording the next data at an interval of a preset cycle time, record them as P(n+1); continuously calculate [P(n+1)-P(n)] / P(n); if -K≤[P(n+1)-P(n)] / P(n)≤K is always satisfied within the preset duration or the preset number of cycles, it is judged that the unit is in a stable state, and the speed of each internal fan can be adjusted, where the K value is set by the technician according to needs.

[0066] Furthermore, during the acceleration process:

[0067] Each time a round of speed increase is completed, the number of rotations is accumulated, and before the next round of speed increase is performed, it is determined whether the accumulated number of rotations is greater than the preset number;

[0068] If it is less than, proceed to the next round of speed increase;

[0069] If it is not less than, end the speed adjustment of each internal fan.

[0070] This arrangement enables each internal fan to perform multiple rounds of speed increase only for a preset number of times, thereby avoiding the adjustment process of each internal fan being too long and affecting the normal operation of the unit. For example, in the above-mentioned solution, the unit is in soft lock mode for a long time, resulting in the unit itself being unable to control the response of various components according to environmental needs.

[0071] In addition, in some other embodiments, the step S100 of gradually increasing the rotation speed of each internal fan includes:

[0072] On the basis of the initial speed, the speed of one internal fan to be adjusted is increased multiple times according to the preset speed-increasing ratio, and the internal fan is adjusted to the saturated operating condition, and then the other internal fans are adjusted to the saturated operating condition one by one.

[0073] In this embodiment, by rapidly increasing the speed of an internal fan multiple times, the internal fan can quickly reach a saturated operating condition. When necessary, this method can be used to increase the speed of an internal fan in a targeted manner to quickly improve the cooling capacity of the refrigerant in the area corresponding to the internal fan.

[0074] In a third aspect, an embodiment of the present invention further provides a precision air conditioning control device.

[0075] Reference Figure 3 , a schematic diagram of the functional modules of the first embodiment of the precision air conditioning control device.

[0076] In this embodiment, the precision air conditioning control device includes:

[0077] A control module is configured to gradually increase the speed of each internal fan. If, after the speed of any internal fan is increased, the overheat gain value of the unit is less than a preset value, the speed of the internal fan is restored to the speed before the speed increase, and the internal fan is determined to be in a saturated operating condition.

[0078] The calculation module is used to obtain the superheat gain value of the unit.

[0079] Among them, the action process of each module in the above-mentioned precision air-conditioning control device corresponds to the steps in the above-mentioned precision air-conditioning control method embodiment, and their functions and implementation processes will not be repeated here one by one.

[0080] In a fourth aspect, an embodiment of the present invention further provides a readable storage medium.

[0081] The readable storage medium of the present invention stores a precision air conditioning control program, wherein when the precision air conditioning control program is executed by a processor, the steps of the precision air conditioning control method described above are implemented.

[0082] Among them, the method implemented when the precision air conditioning control program is executed can refer to the various embodiments of the precision air conditioning control method of the present invention, and will not be repeated here.

[0083] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0084] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0085] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in various embodiments of the present invention.

[0086] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A precision air conditioning control method, characterized in that: include: Increase the speed of each internal fan step by step. If the superheat gain value of the unit is less than the preset value after the speed of any internal fan is increased, restore the speed of the internal fan to the speed before the speed increase, and determine that the internal fan is in a saturated operating condition. Adjust each internal fan to saturation condition; The step of gradually increasing the rotation speed of each internal fan includes: On the basis of the initial speed, the speed of the multiple internal fans to be adjusted is increased one by one according to a preset speed-increasing ratio, wherein one round of speed-increasing of the multiple internal fans to be adjusted is considered as one round of speed-increasing, and the speed of the internal fans is increased step by step according to the preset speed-increasing ratio. During the acceleration process: If the superheat gain value of the unit is greater than the preset value after any internal fan speed is increased, the internal fan will participate in the next round of speed increase based on the current speed; If the superheat gain value of any internal fan is less than the preset value after the speed is increased from the initial speed, it will participate in the next round of speed increase based on the initial speed; If the superheat gain value of the corresponding unit is less than the preset value after any internal fan increases from a non-initial speed, it is determined that the internal fan is in a saturated operating condition and no longer participates in subsequent speed increases.

2. The precision air conditioning control method according to claim 1, wherein: During the acceleration process: Each time a round of speed increase is completed, the number of rotations is accumulated, and before the next round of speed increase is performed, it is determined whether the accumulated number of rotations is greater than the preset number; If it is less than, proceed to the next round of speed increase; If it is not less than, end the speed adjustment of each internal fan.

3. The precision air conditioning control method according to claim 1, wherein: The step of gradually increasing the rotation speed of each internal fan includes: On the basis of the initial speed, the speed of one internal fan to be adjusted is increased multiple times according to the preset speed-increasing ratio, and the internal fan is adjusted to the saturated operating condition, and then the other internal fans are adjusted to the saturated operating condition one by one.

4. The precision air conditioning control method according to claim 1, wherein: Before the acceleration process, it also includes: Determine whether the unit is in a stable operating state; If it is in a stable operating state, the control unit enters the soft lock mode and adjusts the speed of each internal fan; wherein, when the unit is in the soft lock mode, the compressor, electronic expansion valve, and external fan do not respond to PI control.

5. The precision air conditioning control method according to claim 4, wherein: During the speed increase process, if the unit is in an unstable operating state, the unit will be controlled to exit the soft lock mode and end the speed adjustment of each internal fan.

6. A precision air conditioning control device using the precision air conditioning control method according to any one of claims 1 to 5, characterized in that: It includes: A control module is configured to gradually increase the speed of each internal fan. If, after the speed of any internal fan is increased, the overheat gain value of the unit is less than a preset value, the speed of the internal fan is restored to the speed before the speed increase, and the internal fan is determined to be in a saturated operating condition. The calculation module is used to obtain the superheat gain value of the unit.

7. A precision air conditioning control device, characterized in that: The precision air conditioning control device includes a processor, a memory, and a precision air conditioning control program stored in the memory and executable by the processor, wherein when the precision air conditioning control program is executed by the processor, the steps of the precision air conditioning control method as described in any one of claims 1 to 5 are implemented.

8. A readable storage medium, characterized in that: The readable storage medium stores a precision air conditioning control program, wherein when the precision air conditioning control program is executed by the processor, the steps of the precision air conditioning control method according to any one of claims 1 to 5 are implemented.

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