Dual-circulation air conditioning valve control method, device, equipment and readable storage medium

Abstract

The present application relates to a dual-circulation air conditioning valve control method, device, equipment and readable storage medium, and relates to the field of data center computer room air conditioning control technology, including when the air conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running at the same time, when it is detected that the first electronic expansion valve is at the maximum opening, it is judged whether the first electronic expansion valve is at the maximum opening for a duration greater than or equal to a first preset duration, the real-time suction superheat of the air conditioning system is greater than a first threshold, and the real-time ambient temperature is greater than the first temperature threshold for a duration greater than or equal to a second preset duration; if both conditions are met, the other electronic expansion valves are controlled to open to the minimum opening; if at least one condition is not met, the first electronic expansion valve is controlled to maintain the maximum opening. Through the present application, the adaptive adjustment control of the combined valve body can be effectively realized, the operating energy efficiency of the precision air conditioner can be improved, and the operating cost of the data center can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning control in a data center computer room, and in particular to a dual-circulation air conditioning valve control method, device, equipment, and readable storage medium. Background Art

[0002] With the rapid development of big data, data centers have become a vital component of enterprise production systems and a crucial tool for improving competitiveness and operational efficiency. Data center computer room air conditioning systems are typically required to provide year-round cooling and operate 24 / 7. With the growing market and the industry changes brought about by the digital economy, the energy efficiency of precision air conditioning is gaining increasing attention. A high-efficiency market represents a low-carbon and economical environment. For example, relevant requirements call for the PUE (Power Usage Effectiveness) of newly built large and larger data centers to be reduced to below 1.3, while in extremely cold and cold regions, the goal is to reduce it to below 1.25.

[0003] In the related art, since the fluorine pump dual-circulation air conditioner has inherent installation advantages and energy efficiency advantages in the energy-saving transformation of the data center, the actual engineering application of precision air conditioning in the data center usually adopts a fluorine pump dual-circulation air conditioning refrigeration method combining a fluorine pump and a compressor to improve energy efficiency. However, since the compressor is a gaseous refrigerant cycle with a small circulation volume, and the fluorine pump is a liquid refrigerant cycle with a large circulation volume, the above two different circulation volumes will cause the compressor to be prone to liquid hammer and the fluorine pump to be prone to cavitation when the working mode is switched. It can be seen that the change in circulation volume increases the difficulty of adjusting the response of the EEV (Electronic Expansion Valve) combination valve body. Therefore, how to effectively realize the adaptive control of the combination valve body has become a problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a dual-circulation air-conditioning valve body control method, device, equipment and readable storage medium to solve the problem in the related art that adaptive control of the dual-circulation air-conditioning combination valve body cannot be effectively achieved.

[0005] In a first aspect, a dual-circulation air conditioning valve body control method is provided, comprising the following steps:

[0006] When the air-conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, when it is detected that the first electronic expansion valve is at its maximum opening, determining whether simultaneously the conditions are met that the first electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and that the real-time suction superheat of the air-conditioning system is greater than a first threshold and that the real-time ambient temperature is greater than a first temperature threshold for a duration greater than or equal to a second preset duration;

[0007] If all the conditions are met at the same time, control the other electronic expansion valves to open to the minimum opening;

[0008] If at least one of the conditions is not satisfied, the first electronic expansion valve is controlled to maintain a maximum opening.

[0009] In some embodiments, after the step of the air-conditioning system entering a working mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, the method further comprises:

[0010] When it is detected that the first electronic expansion valve is at its minimum opening, determining whether simultaneously the first electronic expansion valve is at its minimum opening for a duration greater than or equal to a first preset duration, and whether the duration for which the real-time intake superheat of the air-conditioning system is less than a second threshold and the real-time ambient temperature is less than the second temperature threshold is greater than or equal to a third preset duration;

[0011] If both conditions are met, the first electronic expansion valve is controlled to open to a first opening, where the first opening is the difference between the minimum opening of the first electronic expansion valve and a preset opening adjustment value;

[0012] If at least one of the conditions is not satisfied, the first electronic expansion valve is controlled to maintain a minimum opening.

[0013] In some embodiments, after the step of controlling the first electronic expansion valve to open to a first opening degree, the method further includes:

[0014] determining whether the first opening is equal to a minimum throttling value;

[0015] If so, control the other electronic expansion valves to open to the minimum opening and close the first electronic expansion valve;

[0016] When it is detected that the duration of other electronic expansion valves being at the minimum opening is greater than or equal to the first preset time, the real-time intake superheat of the air-conditioning system is less than the second threshold, and the real-time ambient temperature is less than the second temperature threshold for a duration greater than or equal to the third preset time, the other electronic expansion valves are controlled to open to a second opening, where the second opening is the difference between the minimum opening of the other electronic expansion valves and the preset opening adjustment value.

[0017] In some embodiments, after the step of controlling the other electronic expansion valves to open to the minimum opening and closing the first electronic expansion valve, the method further includes:

[0018] When it is detected that the other electronic expansion valve is at its maximum opening, determining whether simultaneously the other electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and the real-time intake superheat of the air-conditioning system is greater than a first threshold, and the real-time ambient temperature is greater than a first temperature threshold for a duration greater than or equal to a fourth preset duration;

[0019] If both conditions are met, the first electronic expansion valve is controlled to open to the minimum opening;

[0020] If at least one of the conditions is not satisfied, the other electronic expansion valve is controlled to maintain a maximum opening.

[0021] In some embodiments, after the step of determining whether the first opening is equal to the minimum throttling value, the method further includes:

[0022] If the first opening degree is not equal to the minimum throttling value, the first electronic expansion valve is controlled to maintain the first opening degree.

[0023] In some embodiments, after the step of controlling the first electronic expansion valve to open to a first opening degree or controlling the other electronic expansion valves to open to a second opening degree, the method further includes:

[0024] The timer is reset, and the duration during which the real-time suction superheat of the air-conditioning system is less than the second threshold and the duration during which the real-time ambient temperature is less than the second temperature threshold are re-timed.

[0025] In some embodiments, the first threshold is greater than the second threshold, and the first temperature threshold is greater than the second temperature threshold.

[0026] In a second aspect, a dual-circulation air conditioning valve body control device is provided, comprising:

[0027] a detection unit configured to, when the air-conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, upon detecting that the first electronic expansion valve is at its maximum opening, determine whether simultaneously the conditions are met that the first electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and that the real-time suction superheat of the air-conditioning system is greater than a first threshold, and that the real-time ambient temperature is greater than the first temperature threshold for a duration greater than or equal to a second preset duration;

[0028] A control unit is configured to control the other electronic expansion valves to open to a minimum opening if all conditions are met at the same time; and to control the first electronic expansion valve to maintain a maximum opening if at least one condition is not met.

[0029] In a third aspect, a dual-circulation air-conditioning valve body control device is provided, comprising: a memory and a processor, wherein at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the aforementioned dual-circulation air-conditioning valve body control method.

[0030] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer storage medium stores computer instructions. When the computer instructions are executed by a computer, the computer executes the aforementioned dual-circulation air conditioning valve body control method.

[0031] The beneficial effects brought about by the technical solution provided by this application include: effectively realizing the adaptive control of the dual-circulation air-conditioning combination valve body and improving the operating energy efficiency of the precision air-conditioning.

[0032] The present application provides a dual-circulation air conditioning valve body control method, device, equipment and readable storage medium, including when the air conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running at the same time, when it is detected that the first electronic expansion valve is at the maximum opening, it is judged whether the duration of the first electronic expansion valve at the maximum opening is greater than or equal to the first preset time, the real-time suction superheat of the air conditioning system is greater than the first threshold and the real-time ambient temperature is greater than the first temperature threshold for a duration greater than or equal to the second preset time; if all of the conditions are met, the other electronic expansion valves are controlled to open to the minimum opening; if at least one of them is not met, the first electronic expansion valve is controlled to maintain the maximum opening. Through the present application, when the air conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running at the same time, the valve body control mode can be switched to effectively realize the adaptive adjustment control of the combined valve body, thereby improving the operating energy efficiency of the precision air conditioner, and thus effectively reducing the operating cost of the data center. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0034] Figure 1 A flow chart of a dual-circulation air conditioning valve control method provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the structure of the intelligent dual-circulation refrigeration system provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of a specific control flow of the dual-circulation air conditioning valve control method provided in an embodiment of the present application;

[0037] Figure 4 A schematic structural diagram of a dual-circulation air-conditioning valve control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] The embodiments of the present application provide a dual-circulation air conditioning valve body control method, device, equipment and readable storage medium, which can solve the problem in the related art that it is impossible to effectively realize the adaptive control of the dual-circulation air conditioning combination valve body.

[0040] See also Figures 1 to 3 As shown, the embodiment of the present application provides a dual-circulation air conditioning valve body control method, comprising the following steps:

[0041] Step S10: When the air-conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, when it is detected that the first electronic expansion valve is at its maximum opening, determining whether the first electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and the real-time suction superheat of the air-conditioning system is greater than a first threshold and the real-time ambient temperature is greater than the first temperature threshold for a duration greater than or equal to a second preset duration simultaneously;

[0042] For example, see Figure 2 As shown, the intelligent dual-circulation refrigeration system corresponding to the intelligent dual-circulation air conditioner involved in this embodiment mainly includes a compressor, an evaporator, a condenser, an electronic expansion valve assembly (i.e., a combination valve), and a fluorine pump. Among them, the electronic expansion valve assembly includes three electronic expansion valves (i.e., EXVA, EXVB, and EXVC). It should be noted that this embodiment is not limited to protecting three combination valves, and the adaptive control method can also protect two or more combination valves.

[0043] It should be understood that the principle of the intelligent dual-cycle refrigeration system involved in this embodiment is that the refrigerant is first compressed into a high-temperature, high-pressure gas by a compressor, and the refrigerant releases heat through the condenser to become a high-pressure saturated (or supercooled) refrigerant liquid. Then, after passing through a fluorine pump and being pressurized by the liquid refrigerant, it is throttled by an electronic expansion valve to become a low-pressure liquid (or gas-liquid two-phase). Finally, it passes through an evaporator to exchange heat with the indoor environment, removing the heat load in the computer room, and finally the refrigerant returns to the compressor to complete the entire refrigeration cycle. Among them, the intelligent dual-cycle refrigeration system involved in this embodiment uses a fluorine pump to fully utilize the natural cold source, stops the compressor operation in the low temperature season, and thus significantly reduces the energy consumption of the air-conditioning system, thereby improving the PUE of the data center.

[0044] This embodiment determines whether to switch the valve control mode based on the state of the air conditioning system (i.e., the intelligent dual-circulation refrigeration system). Specifically, after the unit is powered on, it determines whether the air conditioning system has entered a compressor-only mode or a compressor and fluorine pump-simultaneous mode. Only when the air conditioning system enters the compressor-only mode or the compressor and fluorine pump-simultaneous mode will the combined valve control mode be switched, thereby achieving reliable and stable system operation and intelligently improving operational energy efficiency. It should be understood that this embodiment enables valve opening self-learning only in compressor mode and in modes where the compressor and fluorine pump are both on, i.e., only in superheat adjustment mode.

[0045] The following embodiments will be explained using a combination valve including an EEVA (i.e., a first electronic expansion valve) and an EEVB (i.e., another electronic expansion valve). The minimum openings of the EEVA and EEVB are preset to X and Y, respectively. These minimum openings refer to the minimum values ​​before the combination valve is triggered to perform adaptive control. The maximum openings of the EEVA and EEVB are preset to M. X, Y, and M can be set to specific values ​​based on actual needs. It should be understood that the initial values ​​corresponding to X and Y are determined based on the minimum opening of the EEV, while the initial value corresponding to M is determined based on the maximum opening of the EEV. It should be understood that during the valve opening self-learning process, if a power outage occurs, the minimum openings of the EEVA and EEVB will be restored to their initial values ​​upon power outage; otherwise, they will be memorized. Furthermore, after a power outage, the air conditioning system will resume its original control mode.

[0046] In this embodiment, after the unit is started up, the timer starts timing and continuously obtains the core operating parameters of the air-conditioning system, which include but are not limited to the suction superheat DSH (i.e., the saturation temperature corresponding to the suction temperature minus the evaporation pressure) and the ambient temperature T4; and after the air-conditioning system enters the working mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, it will be detected whether the first electronic expansion valve EEVA is at the maximum opening. If it is detected that the first electronic expansion valve is at the maximum opening, it will be further determined whether the first electronic expansion valve is at the maximum opening for a first preset time, whether the real-time suction superheat of the air-conditioning system is greater than the first threshold for a second preset time, and whether the real-time ambient temperature is greater than the first temperature threshold for a second preset time. That is, it is necessary to determine whether the following conditions are met at the same time: the duration of EEVA being at the maximum opening M is greater than or equal to the first preset time t0, the duration of the real-time suction superheat DSH of the air-conditioning system being greater than the first threshold D is greater than or equal to the second preset time t2, and the duration of the real-time ambient temperature T4 being greater than the first temperature threshold E is greater than or equal to the second preset time t2. It should be noted that t0, t2, D and E can be set to specific values ​​according to actual needs and are not limited here. Among them, t0 and t2 are constants, and D and E are positive numbers.

[0047] Step S20: If all conditions are met at the same time, control the other electronic expansion valves to open to the minimum opening;

[0048] For example, in this embodiment, if the above conditions are met at the same time, that is, EXVA is at the maximum opening M for a period of time t0 and DSH>D, T4>E for a period of time t2, it means that EXVA alone is not sufficient to meet the throttling requirements of the air-conditioning system, that is, the assistance of other electronic expansion valves in the combination valve is required. Therefore, the other electronic expansion valves EEVB are controlled to open to the minimum opening to assist in throttling, thereby meeting the throttling requirements of the air-conditioning system.

[0049] Step S30: If at least one condition is not satisfied, control the first electronic expansion valve to maintain a maximum opening.

[0050] Exemplarily, in this embodiment, if the above conditions are not met at the same time, that is, at least one of EXVA being at the maximum opening M for not lasting t0 time or DSH>D for not lasting t2 time or T4>E for not lasting t2 time, it means that the throttling demand of the air-conditioning system can be met by only opening the EXVA in the combination valve, so EXVA is controlled to maintain the maximum opening and continue to throttle at the maximum opening.

[0051] Furthermore, after the step of the air-conditioning system entering the working mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, the method further includes:

[0052] When it is detected that the first electronic expansion valve is at its minimum opening, determining whether simultaneously the conditions are met that the duration of the first electronic expansion valve being at its minimum opening is greater than or equal to a first preset duration, and the duration of the duration of the real-time intake superheat of the air-conditioning system being less than a second threshold and the real-time ambient temperature being less than a second temperature threshold is greater than or equal to a third preset duration; wherein the first threshold is greater than the second threshold, and the first temperature threshold is greater than the second temperature threshold;

[0053] If both conditions are met, the first electronic expansion valve is controlled to open to a first opening, where the first opening is the difference between the minimum opening of the first electronic expansion valve and a preset opening adjustment value;

[0054] If at least one of the conditions is not satisfied, the first electronic expansion valve is controlled to maintain a minimum opening.

[0055] For example, in this embodiment, after the air conditioning system enters the compressor-only operation mode or the compressor and fluorine pump operation mode, it further checks whether the EEVA is at its minimum opening. If the EEVA is detected to be at its minimum opening, the system then determines whether the EEVA has been at its minimum opening for a first preset time, whether the air conditioning system's real-time intake air superheat has been less than a second threshold for a third preset time, and whether the real-time ambient temperature has been less than a second temperature threshold for a third preset time. Specifically, the system determines whether the following conditions are simultaneously met: whether the EEVA has been at its minimum opening X for a first preset time t0, whether the air conditioning system's real-time intake air superheat DSH has been less than a second threshold A for a third preset time t1, and whether the real-time ambient temperature T4 has been less than a second temperature threshold B for a third preset time t1. It should be noted that t1, A, and B can be set to specific values ​​based on actual needs and are not limited herein. However, D should be greater than A, E should be greater than B, t1 is a constant, and A and B are positive numbers.

[0056] If all of the above conditions are met simultaneously, the EEVA opening is set to X-1 pls = the first opening X', and the EEVA is controlled to open to the first opening X'. It is understood that each time the above conditions are met simultaneously, the EEVA opening is reduced by 1 pls, forming a new first opening. Here, 1 pls is the preset opening adjustment value. It should be noted that 1 pls is merely an example and the preset opening adjustment value can be set as needed. If at least one of the conditions is not met, the throttling requirement of the air conditioning system can be met by simply opening the EXVA in the combination valve. Therefore, the EXVA is controlled to maintain the minimum opening X', and throttling continues at this minimum opening X'.

[0057] Furthermore, after the step of controlling the first electronic expansion valve to open to a first opening degree, the method further includes:

[0058] determining whether the first opening is equal to a minimum throttling value;

[0059] If so, control the other electronic expansion valves to open to the minimum opening and close the first electronic expansion valve;

[0060] When it is detected that the duration of other electronic expansion valves being at the minimum opening is greater than or equal to the first preset time, the real-time intake superheat of the air-conditioning system is less than the second threshold, and the real-time ambient temperature is less than the second temperature threshold for a duration greater than or equal to the third preset time, the other electronic expansion valves are controlled to open to a second opening, where the second opening is the difference between the minimum opening of the other electronic expansion valves and the preset opening adjustment value.

[0061] For example, it should be understood that the minimum throttling value C is the minimum value corresponding to triggering the adaptive control of the combination valve. It is a positive number, and its specific value can be determined based on actual conditions. If the real-time opening of the EXVA has reached the minimum throttling value, the opening of the EXVA cannot be further reduced. Doing so may cause the EXVA to malfunction, which in turn may lead to system failure. The first opening X' formed by the EEVA opening after multiple 1 pls self-decrements may reach the minimum throttling value C. Therefore, each time the EEVA opening is decremented, it is necessary to determine whether the first opening X' is equal to the minimum throttling value C. If X' = C, the other electronic expansion valves are controlled to open to their minimum openings, the first electronic expansion valve is closed, for example, the EXVB is controlled to open to its minimum opening Y (if the combination valve includes an electronic expansion valve other than the EXVB, such as the EXVC, the EXVC can also be controlled to open to its minimum opening at this time), and the EXVA is closed.

[0062] At this time, EXVB will be monitored, and it is necessary to further determine whether the duration of EXVB being at the minimum opening is greater than or equal to the first preset duration, whether the duration of the real-time intake superheat of the air-conditioning system being less than the second threshold is greater than or equal to the third preset duration, and whether the duration of the real-time ambient temperature being less than the second temperature threshold is greater than or equal to the third preset duration; that is, it is necessary to determine whether the following conditions are met at the same time: the duration of EXVB being at the minimum opening Y is greater than or equal to the first preset duration t0, the duration of the real-time intake superheat DSH of the air-conditioning system being less than the second threshold A is greater than or equal to the third preset duration t1, and the duration of the real-time ambient temperature T4 being greater than the second temperature threshold B is greater than or equal to the third preset duration t1.

[0063] If the above conditions are simultaneously met—that is, the EXVB is at its minimum opening Y for time t0 and DSH < A and T4 < B for time t1—the EEVB is controlled to open to the second opening Y′. It should be noted that the second opening Y′ = Y - 1 pls. As long as the above conditions are simultaneously met, the EEVB opening is automatically reduced by 1 pls, forming a new second opening. If at least one of the conditions is not met—that is, the EXVB is not at its minimum opening Y for time t0, DSH < A for time t1, or T4 < B for time t1—the EXVB is controlled to maintain its minimum opening Y, and throttling continues at this minimum opening Y.

[0064] Furthermore, the alarm shutdown value F is the throttling value at which the air conditioning system needs to shut down. Its specific value can be determined based on actual conditions. If the real-time opening of the EXVB has reached the alarm shutdown value F, the opening of the EXVB cannot be further reduced, and the air conditioning system must be shut down to prevent malfunction. The second opening Y′, formed by the EEVB opening through multiple 1-pls decrements, may reach the alarm shutdown value F. Therefore, each time the EEVB opening is decremented, it is necessary to determine whether the second opening Y′ is equal to the alarm shutdown value F. If Y′ = F, the air conditioning system is shut down. If Y′ ≠ F, the EXVB is controlled to maintain the second opening Y′, and throttling continues at this second opening Y′.

[0065] Furthermore, after the step of controlling the other electronic expansion valves to open to the minimum opening and closing the first electronic expansion valve, the method further includes:

[0066] When it is detected that the other electronic expansion valve is at its maximum opening, determining whether simultaneously the other electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and the real-time intake superheat of the air-conditioning system is greater than a first threshold, and the real-time ambient temperature is greater than a first temperature threshold for a duration greater than or equal to a fourth preset duration;

[0067] If both conditions are met, the first electronic expansion valve is controlled to open to the minimum opening;

[0068] If at least one of the conditions is not satisfied, the other electronic expansion valve is controlled to maintain a maximum opening.

[0069] For example, in this embodiment, after controlling the EXVB to its minimum opening, the EXVB's opening will increase or decrease based on the actual operating conditions of the air conditioning system. At this point, it is necessary to determine whether the EXVB is at its maximum opening. If the EXVB is at its maximum opening, it is further necessary to determine whether the following conditions are simultaneously met: the EXVB remains at its maximum opening M for a duration greater than or equal to a first predetermined duration t0, the air conditioning system's real-time intake superheat DSH remains greater than a first threshold D for a duration greater than or equal to a fourth predetermined duration t3, and the real-time ambient temperature T4 remains greater than a first temperature threshold E for a duration greater than or equal to a fourth predetermined duration t3. It should be noted that t3 is a constant and can be set to a specific value based on actual needs, and is not limited here.

[0070] If the above conditions are met at the same time, that is, EXVB is at the maximum opening M for a duration of t0 and DSH>D, T4>E for a duration of t3, EXVA will be controlled to reopen to the minimum opening to assist in throttling, thereby meeting the throttling requirements of the air-conditioning system; and if the above conditions are not met at the same time, that is, EXVB is at the maximum opening M for a duration of not t0 or DSH>D for a duration of not t3 or T4>E for a duration of not t3, EXVB will be controlled to maintain the maximum opening and continue to throttle at the maximum opening.

[0071] Furthermore, after the step of determining whether the first opening is equal to the minimum throttling value, the method further includes:

[0072] If the first opening degree is not equal to the minimum throttling value, the first electronic expansion valve is controlled to maintain the first opening degree.

[0073] For example, in this embodiment, if X′≠C, EXVA will be controlled to maintain the first opening, and throttling will continue with X′ without the assistance of other electronic expansion valves in the combination valve, so that the throttling requirements of the air-conditioning system can be met. According to actual needs, the opening of EXVA can be further reduced to further achieve throttling of the air-conditioning system.

[0074] Furthermore, after the step of controlling the first electronic expansion valve to open to a first opening degree or controlling the other electronic expansion valves to open to a second opening degree, the method further includes:

[0075] The timer is reset, and the duration during which the real-time suction superheat of the air-conditioning system is less than the second threshold and the duration during which the real-time ambient temperature is less than the second temperature threshold are re-timed.

[0076] For example, in this embodiment, no matter whether the opening of EEVA decreases each time or the opening of EEVB decreases each time, the timer needs to be reset, and the duration of the real-time intake superheat DSH of the air-conditioning system being less than the second threshold A and the duration of the real-time ambient temperature T4 being less than the second temperature threshold B are re-timed.

[0077] Thus, through this application, when the air conditioning system enters the operating mode where only the compressor is running or the compressor and fluorine pump are running simultaneously, the valve body control mode can be switched to effectively achieve adaptive adjustment control of the combined valve body, thereby improving the operating energy efficiency of the precision air conditioner and effectively reducing the operating costs of the data center. In addition, due to the extreme installation conditions and special load conditions of the air conditioning system, the valve body is often prone to overshoot in the refrigeration system operating mode. The valve body adaptive control method provided in this embodiment can effectively solve the problem of valve body overshoot in extreme situations.

[0078] In summary, the intelligent dual-cycle refrigeration system provided by this embodiment can achieve the purpose of stable operation of precision air conditioners under low-temperature conditions while ensuring the reliability of the refrigeration system, effectively reduce the probability of computer room failures, improve the reliability of computer room operation, thereby reducing the operation and maintenance costs and economic losses of the computer room. Compared with the conventional control method, the corresponding valve body control method has significantly higher intelligence in combined valve control, has the function of self-adaptive optimization of operation reliability, is not only low-carbon and efficient, effectively reduces the operation economic cost of the data center, avoids the ineffective waste of energy, and reduces the operation and maintenance costs and potential reliability risks of the computer room.

[0079] The following will further Figure 3 explain the control logic of the dual-cycle air conditioner valve body control method provided by this embodiment.

[0080] On the premise that the air conditioner system is normally started and the relevant operation parameters are normal without alarms, execute the following control logic;

[0081] On the premise that the air conditioner system is normally started and the relevant operation parameters are normal without alarms, execute the following control logic; Step N1: The unit starts running, the timer starts timing, and continuously obtains the core operation parameters of the air conditioner system, including the suction superheat DSH and the ambient temperature T4;

[0082] Step N2: When the system enters the working mode of compressor operation or simultaneous operation of compressor and fluorine pump, if both are satisfied: the current maximum opening M of EXVA lasts for t0 time, and DSH > D and T4 > E last for t2 time, then enter Step N3; if both are satisfied: the current minimum opening X of EXVA lasts for t0 time, and DSH < A and T4 < B last for t1 time (when X of the EEVA valve body decreases by 1 each time, the time is cleared), then enter Step N4;

[0083] Step N3: Open the minimum opening Y of EXVB;

[0084] Step N4: X' of EEVA = X - 1 pls, and each time Step N4 is executed, it will be checked whether Step N5 is satisfied;

[0085] Step N5: If X' = C pls is satisfied, then open the minimum opening Y of EXVB, close EXVA, and enter Step N6; if X' = C pls is not satisfied, then control EEVA to maintain X';

[0086] Step N6: If both are satisfied: the current minimum opening Y of EXVB lasts for t0 time, and DSH < A and T4 < B last for t1 time (when Y of the EEVB valve body decreases by 1 each time, the time is cleared), then enter Step N7; if both are satisfied: the current maximum opening M of EXVB lasts for t0 time, and DSH > D and T4 > E last for t3 time, then enter Step N8;

[0087] Step N7: Y′ of EEVB = Y-1 pls;

[0088] Step N8: Open EXVA to the minimum opening X.

[0089] The present application also provides a dual-circulation air conditioning valve control device, comprising:

[0090] a detection unit configured to, when the air-conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, upon detecting that the first electronic expansion valve is at its maximum opening, determine whether simultaneously the conditions are met that the first electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and that the real-time suction superheat of the air-conditioning system is greater than a first threshold, and that the real-time ambient temperature is greater than the first temperature threshold for a duration greater than or equal to a second preset duration;

[0091] A control unit is configured to control the other electronic expansion valves to open to a minimum opening if all conditions are met at the same time; and to control the first electronic expansion valve to maintain a maximum opening if at least one condition is not met.

[0092] Furthermore, the detection unit is also used to determine whether, when it is detected that the first electronic expansion valve is at its minimum opening, the duration for which the first electronic expansion valve is at its minimum opening is greater than or equal to a first preset duration, and whether the duration for which the real-time intake superheat of the air-conditioning system is less than a second threshold and the real-time ambient temperature is less than a second temperature threshold is greater than or equal to a third preset duration. The control unit is also used to control the first electronic expansion valve to open to a first opening if all of the conditions are met at the same time, the first opening being the difference between the minimum opening of the first electronic expansion valve and a preset opening adjustment value. If at least one of the conditions is not met, the first electronic expansion valve is controlled to maintain its minimum opening.

[0093] Furthermore, the control unit is further configured to:

[0094] determining whether the first opening is equal to a minimum throttling value;

[0095] If so, control the other electronic expansion valves to open to the minimum opening and close the first electronic expansion valve;

[0096] When the detection unit detects that the other electronic expansion valves are at the minimum opening for a duration greater than or equal to a first preset time, the real-time intake superheat of the air-conditioning system is less than a second threshold, and the real-time ambient temperature is less than the second temperature threshold for a duration greater than or equal to a third preset time, the other electronic expansion valves are controlled to open to a second opening, where the second opening is the difference between the minimum opening of the other electronic expansion valves and a preset opening adjustment value.

[0097] Furthermore, the detection unit is also used to determine whether, when it is detected that the other electronic expansion valves are at their maximum opening, the duration for which the other electronic expansion valves are at their maximum opening is greater than or equal to a first preset duration, and the duration for which the real-time intake superheat of the air-conditioning system is greater than a first threshold and the real-time ambient temperature is greater than a first temperature threshold is greater than or equal to a fourth preset duration. The control unit is also used to control the first electronic expansion valve to open to its minimum opening if all of the conditions are met at the same time; and to control the other electronic expansion valves to maintain their maximum opening if at least one of the conditions is not met.

[0098] Furthermore, the control unit is further configured to: if the first opening is not equal to a minimum throttling value, control the first electronic expansion valve to maintain the first opening.

[0099] Furthermore, the control unit is further configured to:

[0100] The timer is reset, and the duration during which the real-time suction superheat of the air-conditioning system is less than the second threshold and the duration during which the real-time ambient temperature is less than the second temperature threshold are re-timed.

[0101] Furthermore, the first threshold is greater than the second threshold, and the first temperature threshold is greater than the second temperature threshold.

[0102] It should be noted that those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and units can refer to the corresponding processes in the aforementioned dual-circulation air-conditioning valve body control method embodiment, and will not be repeated here.

[0103] The apparatus provided in the above embodiment can be implemented in the form of a computer program. The computer program can be used in Figure 4 The two-cycle air conditioning valve body shown is running on the control device.

[0104] An embodiment of the present application also provides a dual-circulation air-conditioning valve body control device, including: a memory, a processor and a network interface connected through a system bus, at least one instruction is stored in the memory, and at least one instruction is loaded and executed by the processor to implement all or part of the steps of the aforementioned dual-circulation air-conditioning valve body control method.

[0105] Among them, the network interface is used for network communication, such as sending assigned tasks, etc. Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0106] The processor may be a CPU, or other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor may be a microprocessor, or any conventional processor. The processor is the control center of a computer device, connecting various parts of the entire computer device using various interfaces and lines.

[0107] The memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area. The program storage area can store an operating system, at least one application required for a function (such as a video playback function, an image playback function, etc.), etc.; the data storage area can store data created based on the use of the mobile phone (such as video data, image data, etc.). In addition, the memory can include high-speed random access memory and non-volatile memory, such as a hard disk, internal memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0108] The embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the steps of the aforementioned dual-circulation air conditioning valve body control method are implemented.

[0109] The embodiments of the present application implement all or part of the aforementioned processes, and may also be completed by instructing related hardware through a computer program. The computer program may be stored in a computer-readable storage medium, and the computer program, when executed by a processor, may implement the steps of each of the above methods. Among them, the computer program includes computer program code, and the computer program code may be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0110] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, servers, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage) containing computer-usable program code.

[0111] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0112] 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.

[0113] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A dual-circulation air conditioning valve control method, characterized in that: The following steps are involved: When the air-conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, when it is detected that the first electronic expansion valve is at its maximum opening, determining whether simultaneously the conditions are met that the first electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and that the real-time suction superheat of the air-conditioning system is greater than a first threshold and that the real-time ambient temperature is greater than a first temperature threshold for a duration greater than or equal to a second preset duration; If all the conditions are met at the same time, control the other electronic expansion valves to open to the minimum opening; If at least one of the conditions is not satisfied, the first electronic expansion valve is controlled to maintain a maximum opening.

2. The dual-circulation air conditioning valve control method according to claim 1, characterized in that: After the step of the air-conditioning system entering a working mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, the method further includes: When it is detected that the first electronic expansion valve is at its minimum opening, determining whether simultaneously the first electronic expansion valve is at its minimum opening for a duration greater than or equal to a first preset duration, and whether the duration for which the real-time intake superheat of the air-conditioning system is less than a second threshold and the real-time ambient temperature is less than the second temperature threshold is greater than or equal to a third preset duration; If both conditions are met, the first electronic expansion valve is controlled to open to a first opening, where the first opening is the difference between the minimum opening of the first electronic expansion valve and a preset opening adjustment value; If at least one of the conditions is not satisfied, the first electronic expansion valve is controlled to maintain a minimum opening.

3. The dual-circulation air conditioning valve control method according to claim 2, characterized in that: After the step of controlling the first electronic expansion valve to open to a first opening degree, the method further includes: determining whether the first opening is equal to a minimum throttling value; If so, control the other electronic expansion valves to open to the minimum opening and close the first electronic expansion valve; When it is detected that the duration of other electronic expansion valves being at the minimum opening is greater than or equal to the first preset time, the real-time intake superheat of the air-conditioning system is less than the second threshold, and the real-time ambient temperature is less than the second temperature threshold for a duration greater than or equal to the third preset time, the other electronic expansion valves are controlled to open to a second opening, where the second opening is the difference between the minimum opening of the other electronic expansion valves and the preset opening adjustment value.

4. The dual-circulation air conditioning valve control method according to claim 3, characterized in that: After the step of controlling the other electronic expansion valves to open to the minimum opening and closing the first electronic expansion valve, the method further includes: When it is detected that the other electronic expansion valve is at its maximum opening, determining whether simultaneously the other electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and the real-time intake superheat of the air-conditioning system is greater than a first threshold, and the real-time ambient temperature is greater than a first temperature threshold for a duration greater than or equal to a fourth preset duration; If both conditions are met, the first electronic expansion valve is controlled to open to the minimum opening; If at least one of the conditions is not satisfied, the other electronic expansion valve is controlled to maintain a maximum opening.

5. The dual-circulation air conditioning valve control method according to claim 3, characterized in that: After the step of determining whether the first opening is equal to the minimum throttling value, the method further includes: If the first opening degree is not equal to the minimum throttling value, the first electronic expansion valve is controlled to maintain the first opening degree.

6. The dual-circulation air conditioning valve control method according to claim 3, characterized in that: After the step of controlling the first electronic expansion valve to open to the first opening degree or controlling the other electronic expansion valves to open to the second opening degree, the method further includes: The timer is reset, and the duration during which the real-time suction superheat of the air-conditioning system is less than the second threshold and the duration during which the real-time ambient temperature is less than the second temperature threshold are re-timed.

7. The dual-circulation air conditioning valve control method according to claim 2, characterized in that: The first threshold is greater than the second threshold, and the first temperature threshold is greater than the second temperature threshold.

8. A dual-circulation air conditioning valve control device, characterized in that: include: a detection unit configured to, when the air-conditioning system enters an operating mode in which only the compressor is running or the compressor and the fluorine pump are running simultaneously, upon detecting that the first electronic expansion valve is at its maximum opening, determine whether simultaneously the conditions are met that the first electronic expansion valve is at its maximum opening for a duration greater than or equal to a first preset duration, and that the real-time suction superheat of the air-conditioning system is greater than a first threshold, and that the real-time ambient temperature is greater than the first temperature threshold for a duration greater than or equal to a second preset duration; A control unit is configured to control the other electronic expansion valves to open to a minimum opening if all conditions are met at the same time; and to control the first electronic expansion valve to maintain a maximum opening if at least one condition is not met.

9. A dual-circulation air conditioning valve control device, characterized in that: include: A memory and a processor, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the dual-circulation air conditioning valve body control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a computer, the computer is enabled to execute the dual-cycle air conditioning valve body control method according to any one of claims 1 to 7.

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