Control method and control system for bypass flow of air conditioning unit and electronic equipment

Abstract

The invention provides a control method and system for bypass flow of an air conditioning unit and electronic equipment. The control method comprises the steps that the bypass flow of a bypass valve, the return water temperature between a water collector and a cold source unit and the water supply temperature between a water segregator and the cold source unit are obtained; and adjusting the opening degree of the bypass valve and the number of the cold source units based on the water return temperature, the water supply temperature and the relationship between the bypass flow and the preset flow value. According to the control method, by monitoring and controlling the bypass flow of the bypass valve, the return water temperature between the water collector and the cold source unit and the water supply temperature between the water segregator and the cold source unit in real time, accurate regulation and control over the bypass flow of the air conditioning unit are achieved, and the bypass flow can be automatically adjusted; the water return temperature and the water supply temperature are kept within a proper range, the stability of the air conditioning unit is enhanced, energy waste is avoided, and the overall energy efficiency of the air conditioning unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment control, and particularly to a control method, a control system, and an electronic device for the bypass flow rate of an air-conditioning unit. Background Art

[0002] In modern architecture and industry, as an important device for maintaining a comfortable indoor environment, the performance stability and energy efficiency optimization of air-conditioning units have always been the focus of research and development. When a traditional air-conditioning unit operates, it usually cools the cooling water through a load, and then distributes the cooling water to the load through a water collector and a water distributor for heat exchange to achieve the purpose of cooling.

[0003] It is particularly worth noting that the bypass valve plays a key role in the air-conditioning unit. The bypass valve is located between the water collector and the water distributor. By adjusting its opening degree, the bypass flow rate of the cooling water between the water collector and the water distributor can be controlled. This bypass flow rate not only affects the balance between the return water temperature and the supply water temperature, but also directly relates to the energy efficiency and stability of the air-conditioning unit. In traditional control methods, the opening degree of the bypass valve is often set to a fixed value or adjusted roughly according to experience. This control method cannot adapt to the dynamic changes of load demand and environmental temperature, and is prone to energy waste and equipment loss. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. For this purpose, the present invention provides a control method for the bypass flow rate of an air-conditioning unit, which solves the problem that the opening degree of the existing bypass valve is often set to a fixed value or adjusted roughly according to experience, and this control method cannot adapt to the dynamic changes of load demand and environmental temperature, and is prone to energy waste and equipment loss.

[0005] According to the control method for the bypass flow rate of an air-conditioning unit provided by the first aspect embodiment of the present invention, the air-conditioning unit includes: a water collector, a water distributor, a bypass valve, a load, and a plurality of cold source units; one end of the load is communicated with the water inlets of the plurality of cold source units through the water collector, the other end of the load is communicated with the water outlets of the plurality of cold source units through the water distributor, and the bypass valve is communicated with the water collector and the water distributor; The control method for the bypass flow rate of the air-conditioning unit includes: Obtaining the bypass flow rate of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit; Based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow preset value, adjusting the opening degree of the bypass valve and the number of cold source units.

[0006] In an embodiment of the present invention, by monitoring and controlling the bypass flow rate of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit in real time, precise regulation of the bypass flow rate of the air conditioning unit is achieved. This method can automatically adjust the bypass flow rate to ensure that the return water temperature and the supply water temperature are maintained within an appropriate range, enhancing the stability of the air conditioning unit, and avoiding energy waste, thereby improving the overall energy efficiency of the air conditioning unit.

[0007] According to an embodiment of the present invention, the flow rate preset value is divided into a first flow rate preset value and a second flow rate preset value. The step of adjusting the opening degree of the bypass valve and the number of cold source units based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow rate preset value includes: When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is less than the preset value of the supply-return water temperature difference, increase the opening degree of the bypass valve; When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is greater than the preset value of the supply-return water temperature difference, decrease the opening degree of the bypass valve; When the bypass flow rate is greater than the second flow rate preset value and multiple cold source units are operating, reduce the number of cold source units and decrease the opening degree of the bypass valve; wherein, the second flow rate preset value is greater than the first flow rate preset value.

[0008] In an embodiment of the present invention, based on real-time information such as the bypass flow rate, supply water temperature, and return water temperature, precise regulation of the bypass flow rate of the air conditioning unit and the number of cold source units can be achieved, thereby ensuring that the cooling requirements of the cold source unit are met, while reducing energy waste and improving the overall energy efficiency of the air conditioning unit.

[0009] According to an embodiment of the present invention, the air conditioning unit further includes: a plurality of water pumps, each of which is disposed between the water collector and the water inlet of the corresponding cold source unit; The first flow rate preset value is less than the rated flow rate of the water pump; the second flow rate value is greater than the rated flow rate of the water pump and greater than or equal to the minimum flow rate for the operation of the cold source unit.

[0010] According to an embodiment of the present invention, the method for controlling the bypass flow rate of the air conditioning unit further includes: Obtain the return water pressure between the water collector and the cold source unit and the supply water pressure between the water distributor and the cold source unit; When the bypass flow rate is greater than the second flow rate preset value and only one or less than one cold source unit is operating, generate a preset value of the supply-return water pressure difference; Adjust the operating frequency of the water pump and / or the number of operating water pumps based on the preset value of the pressure difference between the supply water and the return water and the pressure difference between the supply water pressure and the return water pressure.

[0011] In this embodiment, the bypass flow control method of the air-conditioning unit is adjusted not only based on the return water temperature, the supply water temperature, and the relationship between the bypass flow and the preset flow value, but also the monitoring and control of the return water pressure and the supply water pressure are introduced to optimize the operating efficiency and stability of the system.

[0012] According to an embodiment of the present invention, the step of adjusting the operating frequency of the water pump and / or the number of operating water pumps based on the preset value of the pressure difference between the supply water and the return water and the pressure difference between the supply water pressure and the return water pressure includes: when the preset value of the pressure difference between the supply water and the return water is less than the pressure difference, reduce the operating frequency of the water pump and / or reduce the number of operating water pumps.

[0013] The control method of the bypass flow of the air-conditioning unit provided by the present invention can effectively adjust the number of operating water pumps and adjust the pressure in the entire unit.

[0014] According to an embodiment of the present invention, the pressure difference of the supply and return water system is maintained within a preset range by adjusting the operating frequency and / or the number of water pumps.

[0015] According to an embodiment of the present invention, it further includes: Monitoring the operating states of multiple cold source units and / or the operating state of the bypass valve; Generating an alarm signal when it is detected that the cold source unit is abnormal or the bypass valve fails; In response to the alarm signal, closing the bypass valve until the cold source unit returns to normal or the bypass valve failure is eliminated.

[0016] This embodiment can greatly improve the stability and safety of the air-conditioning system by adding real-time monitoring of the cold source unit and the bypass valve and abnormal handling steps. At the same time, by optimizing aspects such as monitoring parameters, alarm mechanisms, emergency measures, and fault handling processes, the performance and reliability of the system can be further improved.

[0017] According to the control system of the air-conditioning unit provided by the second aspect embodiment of the present invention, it includes: An acquisition module for acquiring the bypass flow of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit; An adjustment module for adjusting the opening degree of the bypass valve and the number of cold source units based on the relationship between the return water temperature, the supply water temperature, and the bypass flow and the preset flow value.

[0018] An electronic device according to an embodiment of the third aspect of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the control method for the bypass flow rate of the air-conditioning unit is implemented.

[0019] An embodiment of the fourth aspect of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the control method for the bypass flow rate of the air-conditioning unit is implemented.

[0020] An embodiment of the fifth aspect of the present invention further provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the control method for the bypass flow rate of the air-conditioning unit.

[0021] The control method for the bypass flow rate of the air-conditioning unit provided by the present invention realizes precise regulation of the bypass flow rate of the air-conditioning unit by real-time monitoring and controlling the bypass flow rate of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit. This method can automatically adjust the bypass flow rate, ensure that the return water temperature and the supply water temperature are maintained within an appropriate range, enhance the stability of the air-conditioning unit, and avoid energy waste, thereby improving the overall energy efficiency of the air-conditioning unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of an air-conditioning unit provided by an embodiment of the present invention.

[0025] Figure 2 It is one of the flowcharts of the control method for the bypass flow rate of the air-conditioning unit provided by an embodiment of the present invention.

[0026] Figure 3 It is another flowchart of the control method for the bypass flow rate of the air-conditioning unit provided by an embodiment of the present invention.

[0027] Figure 4 It is yet another flowchart of the control method for the bypass flow rate of the air-conditioning unit provided by an embodiment of the present invention.

[0028] Figure 5Schematic structural diagram of the control system provided by the embodiment of the present invention.

[0029] Figure 6 Schematic structural diagram of the electronic device provided by the embodiment of the present invention.

[0030] Reference numerals: 10, water collector; 20, water distributor; 30, bypass valve; 40, cold source unit; 50, water pump; 510, acquisition module; 520, adjustment module; 610, processor; 620, communication interface; 630, memory; 640, communication bus. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the invention clearer, the technical solutions in the invention will be clearly described below with reference to the accompanying drawings in the invention. Apparently, the described embodiments are some but not all of the embodiments of the invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the invention without creative efforts shall fall within the protection scope of the invention.

[0032] According to the control method for the bypass flow of the air-conditioning unit provided by the first aspect embodiment of the present invention. As Figure 1 shown, the air-conditioning unit includes: a water collector 10, a water distributor 20, a bypass valve 30, a load, and a plurality of cold source units 40. One end of the load is connected to the water inlets of the plurality of cold source units 40 through the water collector 10, and the other end of the load is connected to the water outlets of the plurality of cold source units 40 through the water distributor 20. The bypass valve 30 is connected to the water collector 10 and the water distributor 20. A second temperature sensor is provided between the water collector 10 and the water inlets of the cold source units 40, a first temperature sensor is provided between the water distributor 20 and the water outlets of the cold source units 40, and a flow meter is provided on the pipeline where the bypass valve 30 connects the water collector 10 and the water distributor 20.

[0033] In this embodiment, the water collector 10 collects the water discharged from the load and is connected to the cold source unit 40 through a pipeline. A second temperature sensor is provided on the water collector 10 for monitoring the temperature of the cooling water entering the cold source unit 40. The water distributor 20 distributes the cooling water from the cold source unit 40 to the load. A first temperature sensor is provided between the water distributor 20 and the water outlets of the cold source units 40 for monitoring the temperature of the cooling water coming out of the cold source unit 40. The bypass valve 30 is located between the water collector 10 and the water distributor 20 for adjusting the bypass flow so that part of the cooling water can bypass the load. A flow meter is provided on the pipeline connected by the bypass valve 30 for measuring the bypass flow in real time. The cold source unit 40 generates cooling water and circulates through the water collector 10 and the water distributor 20. The load is generally an indoor unit or other equipment or systems that need to be cooled.

[0034] As Figure 2As shown, the control method for the bypass flow of this air conditioning unit includes the following steps: Step S210: Obtain the bypass flow of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit.

[0035] During the operation of the air conditioning unit, the flow meter obtains the bypass flow of the bypass valve 30. The second temperature sensor obtains the return water temperature between the water collector 10 and the cold source unit 40, and the first temperature sensor obtains the supply water temperature between the water distributor 20 and the cold source unit 40.

[0036] Step S220: Based on the relationship between the return water temperature, the supply water temperature, and the bypass flow and the flow preset value, adjust the opening degree of the bypass valve and the number of cold source units.

[0037] After obtaining the bypass flow, the return water temperature, and the supply water temperature, the current cooling effect can be judged according to the return water temperature and the supply water temperature. For example, if the difference between the supply water temperature and the return water temperature is very small, it indicates that the load may have approached or reached the set temperature, or the cooling capacity of the cold source unit is excessive.

[0038] Compare the actually measured bypass flow with the flow preset value. The flow preset value may be determined based on factors such as system design, energy efficiency optimization, or load demand.

[0039] For example, if the difference between the supply water temperature and the return water temperature is very small, and the bypass flow is greater than the flow preset value, it indicates that too much cooling water is bypassing the load. At this time, the opening degree of the bypass valve 30 should be reduced, and the amount of cooling water entering the load should be increased.

[0040] If the difference between the supply water temperature and the return water temperature is very large, and the bypass flow is less than the flow preset value, it indicates that the load requires more cooling water, but the bypass flow limits the water supply capacity. At this time, the opening degree of the bypass valve 30 should be reduced, the bypass flow should be reduced, and the water supply capacity should be increased.

[0041] The control method for the bypass flow of the air conditioning unit provided by the present invention realizes precise regulation of the bypass flow of the air conditioning unit by monitoring and controlling the bypass flow of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit in real time. This method can automatically adjust the bypass flow, ensure that the return water temperature and the supply water temperature are maintained within an appropriate range, enhance the stability of the air conditioning unit, and avoid energy waste, improving the overall energy efficiency of the air conditioning unit.

[0042] In some embodiments, the flow preset value is divided into a first flow preset value and a second flow preset value. Step S220: The step of adjusting the opening degree of the bypass valve and the number of cold source units based on the relationship between the return water temperature, the supply water temperature, and the bypass flow and the flow preset value includes: Step S2210: When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is less than the preset value of the supply-return water temperature difference, increase the opening degree of the bypass valve.

[0043] Step S2220: When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is greater than the preset value of the supply-return water temperature difference, decrease the opening degree of the bypass valve.

[0044] Step S2230: When the bypass flow rate is greater than the second flow rate preset value and multiple cold source units are operating, reduce the number of cold source units and decrease the opening degree of the bypass valve; where the second flow rate preset value is greater than the first flow rate preset value.

[0045] When adjusting the bypass flow rate of the air conditioning unit and the number of cold source units, according to the relationship between the bypass flow rate and the two flow rate preset values (the first flow rate preset value and the second flow rate preset value), as well as the relationship between the difference between the supply water temperature and the return water temperature and the preset value of the supply-return water temperature difference, formulate a control strategy. The following are the detailed control steps: During operation, use a flow meter to obtain the bypass flow rate of the bypass valve. Use a second temperature sensor to obtain the return water temperature between the water collector and the cold source unit. Use a first temperature sensor to obtain the supply water temperature between the water distributor and the cold source unit.

[0046] When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is less than the preset value of the supply-return water temperature difference, it indicates that there is surplus cooling water passing through the load, but the difference between the supply water temperature and the return water temperature is small, which may mean that the cooling demand of some loads has been met. At this time, the opening degree of the bypass valve can be appropriately increased to allow more cooling water to bypass the load, thereby reducing energy consumption.

[0047] When the bypass flow rate is less than the first flow rate preset value, but the difference between the supply water temperature and the return water temperature is greater than the preset value of the supply-return water temperature difference, it indicates that there is less cooling water passing through the load, but the difference between the supply water temperature and the return water temperature is large, which may mean that the cooling demand of the load has not been fully met. At this time, the opening degree of the bypass valve should be decreased to allow more cooling water to enter the load to meet its cooling demand.

[0048] When the bypass flow rate is greater than the second flow rate preset value (note: the second flow rate preset value is generally greater than the first flow rate preset value) and there are multiple cold source units operating in the system, it indicates that too much cooling water is bypassing the load. At this time, the number of cold source units should be reduced first to reduce the generated cooling capacity; at the same time, the opening degree of the bypass valve should be decreased to allow more cooling water to enter the load to meet its cooling demand.

[0049] Through the above control method, it is possible to accurately regulate the bypass flow rate and the number of cold source units of the air-conditioning unit based on real-time information such as bypass flow rate, supply water temperature, and return water temperature, so as to ensure that the cooling requirements of the cold source units are met, while reducing energy waste and improving the overall energy efficiency of the air-conditioning unit.

[0050] In some embodiments, as Figure 1 shown, the air-conditioning unit further includes: a plurality of water pumps 50, the water pumps 50 can be chilled water pumps, and each water pump 50 is arranged between the water collector 10 and the water inlet of the corresponding cold source unit 40; the first flow rate preset value is less than the rated flow rate of the water pump 50; the second flow rate value is greater than the rated flow rate of the water pump 50 and greater than or equal to the minimum flow rate for the operation of the cold source unit 40. The function of the water pump 50 is to provide a stable cooling water flow rate for the cold source unit 40. In this configuration, the control strategy for the bypass flow rate needs to take into account the rated flow rate of the water pump 50 and the working flow rate requirements of the cold source unit 40.

[0051] The following are the detailed steps of the bypass flow rate control method based on the above configuration: When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is less than the preset value of the supply-return water temperature difference, it indicates that there is surplus cooling water passing through the load, but the difference between the supply water temperature and the return water temperature is small, which may mean that the cooling requirements of some loads have been met. At this time, the opening degree of the bypass valve can be appropriately increased to allow more cooling water to bypass the load, thereby reducing energy consumption.

[0052] When the bypass flow rate is less than the first flow rate preset value, but the difference between the supply water temperature and the return water temperature is greater than the preset value of the supply-return water temperature difference, it indicates that there is less cooling water passing through the load, but the difference between the supply water temperature and the return water temperature is large, which may mean that the cooling requirements of the load have not been fully met. At this time, the opening degree of the bypass valve should be reduced to allow more cooling water to enter the load to meet its cooling requirements.

[0053] When the bypass flow rate is greater than the second flow rate preset value and there are multiple cold source units operating in the system, it indicates that too much cooling water is bypassing the load. At this time, the number of cold source units should be reduced first to reduce the generated cooling capacity; at the same time, the opening degree of the bypass valve should be reduced to allow more cooling water to enter the load to meet its cooling requirements.

[0054] In some embodiments, as Figure 3 shown, the control method for the bypass flow rate of the air-conditioning unit further includes: Step S310: Obtain the return water pressure between the water collector and the cold source unit and the supply water pressure between the water distributor and the cold source unit.

[0055] Use a first pressure gauge and a second pressure gauge to obtain the return water pressure between the water collector and the cold source unit, and the supply water pressure between the water distributor and the cold source unit respectively.

[0056] Step S320: When the bypass flow rate is greater than the second flow rate preset value and only one or less than one cold source unit is operating, generate a preset value for the supply and return water pressure difference.

[0057] When the bypass flow rate is greater than the second flow rate preset value and only one or less than one cold source unit in the unit is operating, according to the unit design and operation experience, generate a preset value for the supply and return water pressure difference. This preset value for the supply and return water pressure difference is used to determine whether the difference between the current supply water pressure and the return water pressure is reasonable (if this value already exists, adjust the original value, generally reduce it).

[0058] Step S330: Based on the preset value of the supply and return water pressure difference and the pressure difference between the supply water pressure and the return water pressure, adjust the operating frequency of the water pump and / or the number of operating water pumps.

[0059] After generating the preset value for the supply and return water pressure difference, adjust the operating frequency of the water pump and / or the number of operating water pumps according to the preset value of the supply and return water pressure difference and the pressure difference between the supply water pressure and the return water pressure.

[0060] If the preset value of the supply and return water pressure difference is less than the measured pressure difference between the supply water pressure and the return water pressure, it indicates that the pressure difference in the system is too large, which may be caused by too high supply water pressure or too low return water pressure. At this time, measures need to be taken to reduce the pressure difference in the system to ensure the stable operation of the system. The speed of the water pump can be reduced, thereby reducing the supply water flow rate and the supply water pressure. Reduce the number of operating water pumps: close some water pumps to reduce the total supply water flow rate and the supply water pressure. According to the actual situation, one of the above two strategies can be adopted alone, or both strategies can be adopted simultaneously to achieve the best adjustment effect.

[0061] When adjusting the operating frequency and / or the number of water pumps, it is necessary to ensure that the supply water flow rate of the system can still meet the cooling demand of the load. It is necessary to monitor parameters such as the supply water pressure, the return water pressure, and the bypass flow rate in real time to ensure the stable operation of the system. If it is found that the supply water pressure or the return water pressure continues to be abnormal during the adjustment process, it may be necessary to further check whether there are other problems in the system, such as pipeline blockage, water pump failure, etc.

[0062] In this embodiment, the bypass flow rate control method of the air conditioning unit is not only adjusted based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow rate preset value, but also the monitoring and control of the return water pressure and the supply water pressure are introduced to optimize the operation efficiency and stability of the system.

[0063] In some embodiments, the steps of reducing the operating frequency of the water pump and / or reducing the number of operating water pumps include: Step S3310: Gradually reduce the operating frequency of the water pump and reacquire the pressure difference.

[0064] Step S3320: Compare the preset value of the supply - return water pressure difference with the reacquired pressure difference so that the ratio of the preset value of the supply - return water pressure difference to the pressure difference is within a preset range.

[0065] And / or, Step S3330: (Generally after the water pump has been reduced to the lowest frequency) Gradually reduce the number of operating water pumps and reacquire the pressure difference.

[0066] Step S3340: Compare the preset value of the supply - return water pressure difference with the reacquired pressure difference so that the ratio of the preset value of the supply - return water pressure difference to the pressure difference is within a preset range.

[0067] Specifically, during the adjustment process, the operating frequency of the current water pump is first identified and its frequency is gradually reduced. After each reduction in frequency, the pressure difference between the supply water and the return water is re - measured. The purpose of this step is to find a water pump operating frequency that can meet the requirements and reduce energy consumption. After each reacquisition of the pressure difference, it is compared with the preset value of the supply - return water pressure difference. If the ratio exceeds the preset range (for example, the preset range is 90% to 110%), the frequency of the water pump is adjusted as needed until the ratio returns to the preset range.

[0068] If the frequency of the water pump has been reduced to the lowest, but still needs to be adjusted to maintain the pressure difference within the preset range, the number of operating water pumps will start to be reduced. The operation of reducing the number of water pumps is gradual, and the pressure difference is re - measured after each reduction. After reducing the number of water pumps, the preset value of the supply - return water pressure difference is compared with the reacquired pressure difference again. If the ratio exceeds the preset range, the number of water pumps will continue to be reduced or the frequency of the remaining water pumps will be adjusted until the ratio returns to the preset range.

[0069] In some embodiments, as Figure 4 shown, the control method for the bypass flow of the air - conditioning unit further includes: Step S410: Monitor the operating status of multiple cold - source units and / or the operating status of the bypass valve.

[0070] During operation, the status of multiple cold - source units and the bypass valve is monitored in real - time. The status monitoring may include, but is not limited to, reading and analyzing parameters such as temperature, pressure, flow rate, bypass valve opening degree, etc.

[0071] Step S420: Generate an alarm signal when an abnormality of the cold - source unit or a failure of the bypass valve is detected.

[0072] When the cold source unit or the bypass valve malfunctions, the system should be able to promptly identify and generate an alarm signal. The alarm signal can be transmitted in the form of an electrical signal.

[0073] Step S430: In response to the alarm signal, close the bypass valve until the cold source unit returns to normal or the bypass valve fault is eliminated.

[0074] After receiving the alarm signal, the system needs to take corresponding emergency measures. In this case, closing the bypass valve can be an effective emergency measure to prevent further problems. In addition to closing the bypass valve, other emergency measures can also be considered, such as reducing the load of the cold source unit, switching to a standby unit, etc. Before closing the bypass valve, it is necessary to ensure that the closing operation will not pose a greater safety hazard to the system. After the cold source unit returns to normal or the bypass valve fault is eliminated, the system should be able to automatically resume normal operation.

[0075] This embodiment can greatly improve the stability and safety of the air-conditioning system by adding real-time monitoring of the cold source unit and the bypass valve and abnormal handling steps. At the same time, by optimizing monitoring parameters, alarm mechanisms, emergency measures, and fault handling processes, etc., the performance and reliability of the system can be further improved.

[0076] According to the control system of the air-conditioning unit provided by the second aspect of the present invention, please refer to Figure 5 , including: An acquisition module 510, configured to acquire the bypass flow of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit.

[0077] An adjustment module 520, configured to adjust the opening degree of the bypass valve and the number of cold source units based on the relationship between the return water temperature, the supply water temperature, and the bypass flow and the flow preset value.

[0078] It should be noted that the above steps S210 to S220, as well as other steps, are only for convenience of expression and do not constitute a timing limitation on the steps in the method. There are detailed descriptions therein, and all the contents in the method can also be applied to the embodiments provided by the first aspect. Therefore, in order to avoid repeated description, the embodiments provided by the second aspect of the control system are not described in detail. Similarly, the contents in the above two aspects of the embodiments can be used to explain the contents of all subsequent aspects of the embodiments. Therefore, the repeated contents in the subsequent embodiments are not described again. According to the control system provided by the embodiments of the present invention, its technical effects correspond to those of the above method and will not be elaborated here.

[0079] Figure 6The figure illustrates a schematic diagram of the physical structure of an electronic device, which may include: a processor 610, a communications interface 620, a memory 630, and a communication bus 640. Among them, the processor 610, the communications interface 620, and the memory 630 complete communication with each other through the communication bus 640. The processor 610 can call the logical instructions in the memory 630 to execute the control method for the bypass flow rate of the air conditioning unit. The method includes: obtaining the bypass flow rate of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit; based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow preset value, adjusting the opening degree of the bypass valve and the number of cold source units.

[0080] In addition, when the logical instructions in the above-mentioned memory 630 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-transitory computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0081] Furthermore, an embodiment of the present invention discloses a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the control method provided by each of the above method embodiments. The control method includes: obtaining the bypass flow rate of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit; based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow preset value, adjusting the opening degree of the bypass valve and the number of cold source units.

[0082] The foregoing is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control method for the bypass flow rate of an air conditioning unit, characterized in that, The air conditioning unit includes: a water collector, a water distributor, a bypass valve, a load, and multiple cold source units; one end of the load is communicated with the water inlets of the multiple cold source units through the water collector, the other end of the load is communicated with the water outlets of the multiple cold source units through the water distributor, and the bypass valve is communicated with the water collector and the water distributor; The control method for the bypass flow rate of the air conditioning unit includes: Obtaining the bypass flow rate of the bypass valve, the return water temperature between the water collector and the cold source units, and the supply water temperature between the water distributor and the cold source units; Based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow rate preset value, adjusting the opening degree of the bypass valve and the number of cold source units.

2. The control method for the bypass flow rate of the air conditioning unit according to claim 1, wherein The flow rate preset value is divided into a first flow rate preset value and a second flow rate preset value. The step of adjusting the opening degree of the bypass valve and the number of cold source units based on the relationship between the return water temperature, the supply water temperature, and the bypass flow rate and the flow rate preset value includes: when the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is less than the preset value of the supply-return water temperature difference, increasing the opening degree of the bypass valve; When the bypass flow rate is less than the first flow rate preset value and the difference between the supply water temperature and the return water temperature is greater than the preset value of the supply-return water temperature difference, reducing the opening degree of the bypass valve; When the bypass flow rate is greater than the second flow rate preset value and multiple cold source units are working, reducing the number of cold source units and reducing the opening degree of the bypass valve; wherein, the second flow rate preset value is greater than the first flow rate preset value.

3. The control method for the bypass flow rate of the air conditioning unit according to claim 2, characterized in that, The air conditioning unit further includes: multiple water pumps, and each water pump is arranged between the water collector and the water inlet of the corresponding cold source unit; The first flow rate preset value is less than the rated flow rate of the water pump; the second flow rate value is greater than the rated flow rate of the water pump and greater than or equal to the minimum flow rate of the cold source unit during operation.

4. The control method for the bypass flow rate of the air conditioning unit according to claim 3, characterized in that, The control method for the bypass flow rate of the air conditioning unit further includes: Obtaining the return water pressure between the water collector and the cold source units and the supply water pressure between the water distributor and the cold source units; When the bypass flow rate is greater than the second flow rate preset value and only one or less than one cold source unit is working, generating a preset value of the supply-return water pressure difference; Based on the preset value of the supply-return water pressure difference and the pressure difference between the supply water pressure and the return water pressure, adjusting the operating frequency of the water pump and / or the number of operating water pumps.

5. The control method for the bypass flow rate of the air conditioning unit according to claim 4, characterized in that, The step of adjusting the operating frequency of the water pump and / or the number of operating water pumps based on the preset value of the supply-return water pressure difference and the pressure difference between the supply water pressure and the return water pressure includes: When the preset value of the supply-return water pressure difference is less than the pressure difference, reducing the operating frequency of the water pump and / or reducing the number of operating water pumps.

6. The control method for the bypass flow rate of the air conditioning unit according to claim 5, wherein, The step of reducing the operating frequency of the water pump and / or reducing the number of operating water pumps includes: Gradually reducing the operating frequency of the water pump and re-obtaining the pressure difference; Compare the preset value of the supply - return water pressure difference with the re - obtained pressure difference value to make the ratio of the preset value of the supply - return water pressure difference to the pressure difference value fall within a preset range; And / or, gradually reduce the number of operating pumps and re - obtain the pressure difference value; Compare the preset value of the supply - return water pressure difference with the re - obtained pressure difference value to make the ratio of the preset value of the supply - return water pressure difference to the pressure difference value fall within a preset range.

7. The control method for the bypass flow rate of the air-conditioning unit according to any one of claims 1-6, characterized in that, Further comprising: Monitor the operating states of multiple cold source units and / or the operating state of the bypass valve; Generate an alarm signal when an abnormality of the cold source unit or a failure of the bypass valve is detected; In response to the alarm signal, close the bypass valve until the cold source unit returns to normal or the bypass valve failure is eliminated.

8. A control system for an air conditioning unit, characterized in that, Comprising: An acquisition module for acquiring the bypass flow of the bypass valve, the return water temperature between the water collector and the cold source unit, and the supply water temperature between the water distributor and the cold source unit; An adjustment module for adjusting the opening of the bypass valve and the number of cold source units based on the relationship between the return water temperature, the supply water temperature, and the bypass flow and the flow preset value.

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the control method for the bypass flow of the air - conditioning unit according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing a computer program thereon, characterized in that, When the computer program is executed by the processor, it implements the control method for the bypass flow of the air - conditioning unit according to any one of claims 1 to 7.

11. A computer program product, characterized in that, The computer program product includes a computer program stored on a non - transient computer - readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the control method for the bypass flow of the air - conditioning unit according to any one of claims 1 to 7.

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