Air conditioning system, control method, controller and computer storage medium thereof

Abstract

The application provides an air conditioning system, a control method, a controller and a computer storage medium. The control method comprises: determining a temperature parameter ΔT, the temperature parameter ΔT comprising a supply air temperature difference ΔT f or a supply and return water temperature difference difference ΔT s , the supply air temperature difference ΔT f being a difference between an actual value T f1 of a supply air temperature of a terminal of the air conditioning system and a preset value T f2 of the supply air temperature, the supply and return water temperature difference difference ΔT s being a difference between an actual value T s1 of a supply and return water temperature difference of the air conditioning system and a preset value T s2 of the supply and return water temperature difference; determining an adjustment step |D1| % based on the determined temperature parameter ΔT; and adjusting an opening degree of a water valve of the terminal of the air conditioning system according to the determined adjustment step |D1| %. In this way, energy saving and comfort of the air conditioning system can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system and a control method thereof, a controller and a computer storage medium. Background Art

[0002] As energy conservation and carbon reduction become more stringent and people's requirements for environmental comfort increase, the energy efficiency and comfort of air-conditioning systems are becoming increasingly important.

[0003] Traditional air-conditioning systems use a constant flow control method, which is difficult to effectively meet the needs of different loads and different comfort levels, and their energy saving and comfort are poor. Summary of the Invention

[0004] A technical problem to be solved by this application is to improve the energy efficiency and comfort of the air-conditioning system.

[0005] In order to solve the above technical problems, the present application provides a control method for an air-conditioning system, which includes:

[0006] Determine temperature parameters , temperature parameters Including supply air temperature difference Or supply and return water temperature difference , supply air temperature difference The actual value of the supply air temperature at the end of the air conditioning system Supply air temperature preset value The difference between supply and return water temperature The actual value of the supply and return water temperature difference of the air conditioning system The preset value of the supply and return water temperature difference difference;

[0007] Based on the determined temperature parameters , determine the adjustment step ;

[0008] According to the determined adjustment step , adjust the opening of the water valve at the end of the air-conditioning system.

[0009] In some embodiments, based on the determined temperature parameter , determine the adjustment step include:

[0010] Based on the determined temperature parameters ,Sure value;

[0011] Based on the determined value, determine the adjustment step .

[0012] In some embodiments, ; and / or, , ; and / or, , .

[0013] In some embodiments, 1 ; and / or, ; and / or, .

[0014] In some embodiments, ; and / or, 2, wherein, , .

[0015] In some embodiments, ; and / or, ; and / or, .

[0016] In some embodiments, s; or, s.

[0017] In some embodiments, ; or, .

[0018] In some embodiments, based on the determined value, determining an adjustment step includes:

[0019] When , the adjustment step is determined as a constant ; and / or,

[0020] When , the adjustment step is determined as .

[0021] In some embodiments, .

[0022] In some embodiments, .

[0023] In some embodiments, when adjusting the opening of the water valve at the end of the air conditioning system according to the determined adjustment step , the opening of the water valve at the end of the air conditioning system is adjusted once every interval .

[0024] In some embodiments, .

[0025] In some embodiments, .

[0026] In some embodiments, the adjustment step is determined according to the determined adjustment step , the opening of the water valve at the end of the air conditioning system is adjusted, including:

[0027] When , the opening of the water valve at the end of the air conditioning system is increased ;

[0028] When , the opening of the water valve at the end of the air conditioning system is decreased .

[0029] In some embodiments, the temperature parameter includes:

[0030] After the water valve at the end of the air conditioning system is opened, the delay time , the supply air temperature at the end of the air conditioning system is detected as the actual value of the supply air temperature at the end of the air conditioning system Alternatively, the return water temperature and the supply water temperature at the end of the air conditioning system are detected, and the difference between the detected return water temperature and the supply water temperature at the end of the air conditioning system is taken as the actual value of the supply-return water temperature difference at the end of the air conditioning system ;

[0031] The difference between the actual value of the supply air temperature at the end of the air conditioning system and the preset value of the supply air temperature is taken as the supply air temperature difference , and the supply air temperature difference is determined as the temperature parameter , or the actual value of the supply-return water temperature difference at the end of the air conditioning system is taken as the supply-return water temperature difference difference value , and the supply-return water temperature difference difference value is determined as the temperature parameter .

[0032] In some embodiments, .

[0033] In some embodiments, .

[0034] In some embodiments, the control method further includes:

[0035] The multiple ends of the air conditioning system are divided into multiple control zones, and the total rated flow of each control zone in the multiple control zones is consistent;

[0036] According to the pressure difference of each control zone, the opening of the total water valve of each control zone is adjusted, so that the pressure difference of each control zone is stable.

[0037] In addition, the application further provides a controller comprising a memory and a processor coupled to the memory, the processor being configured to execute the control method of any one of the embodiments based on instructions stored in the memory.

[0038] In addition, the application further provides an air conditioning system comprising the controller of any one of the embodiments.

[0039] In addition, the application further provides a storage medium storing computer instructions, the computer instructions being executed by a processor to perform the control method of any one of the embodiments.

[0040] By determining the step size of the opening degree of the terminal water valve according to the temperature parameter comprising the supply air temperature difference or the supply and return water temperature difference, the opening degree of the terminal water valve is dynamically adjusted, so that the precise variable flow control mode can be conveniently realized, different loads and different comfort requirements can be flexibly met, and the energy saving and comfort of the air conditioning system can be effectively improved.

[0041] Other features and advantages of the application will become apparent from the following detailed description of exemplary embodiments of the application with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0043] Figure 1 It is a schematic diagram of the water circuit of the air conditioning system in the embodiments of the application.

[0044] Figure 2 It is a schematic diagram of the control method in the embodiments of the application.

[0045] Figure 3 It is a schematic diagram of the change of the supply air temperature when the traditional control mode is adopted.

[0046] Figure 4 It is a schematic diagram of the change of the heat exchange amount when the traditional control mode is adopted.

[0047] Figure 5 It is a schematic diagram of the change of the supply air temperature when the supply air temperature difference control mode of the embodiments of the application is adopted.

[0048] Figure 6 It is a schematic diagram of the change of the heat exchange amount when the supply air temperature difference control mode of the embodiments of the application is adopted.

[0049] Figure 7Fig. 1 is a schematic diagram of a change in a difference between a supply water temperature and a return water temperature when a conventional control method is used.

[0050] Figure 8 Fig. 2 is a schematic diagram of a change in a difference between a supply water temperature and a return water temperature when a control method according to an embodiment of the present application is used.

[0051] Reference numerals:

[0052] 1, end; 2, supply water pipe; 3, return water pipe; 4, differential pressure control device; 5, regulation zone. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way should be taken as any limitation of the present application and its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0054] The technologies, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification when appropriate.

[0055] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0056] In the description of the present application, it should be understood that the use of the words "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore cannot be understood as a limitation on the scope of protection of the present application.

[0057] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0058] Figures 1-8 An air conditioning system and a control method thereof according to the present application are exemplarily shown.

[0059] See also Figure 1 The air conditioning system includes a terminal 1, a water supply pipe 2, and a water return pipe 3. During operation, water enters through the water supply pipe 2, and return water flows through the return pipe 3 through the terminal 1 before exiting. Typically, the air conditioning system includes multiple (i.e., at least two, for example, at least three) terminals 1, which are connected in parallel to the return pipe 3, allowing return water to flow through each terminal 1 before exiting.

[0060] Typically, each terminal 1 is equipped with a water valve (not shown) to control the water flow of each terminal 1. By adjusting the opening of the water valve of the terminal 1, the water flow of the terminal 1 can be adjusted. In some embodiments, the water valve of the terminal 1 is a proportional valve.

[0061] To improve the energy efficiency and comfort of air conditioning systems, see Figure 2 , the control method provided in this application includes:

[0062] Determine temperature parameters , temperature parameters Including supply air temperature difference Or supply and return water temperature difference , supply air temperature difference The actual value of the supply air temperature at terminal 1 of the air conditioning system Supply air temperature preset value The difference (i.e., = Actual value of supply air temperature -Preset value of supply air temperature ), supply and return water temperature difference The actual value of the supply and return water temperature difference of the air conditioning system The preset value of the supply and return water temperature difference The difference ( );

[0063] Based on the determined temperature parameters , determine the adjustment step ;

[0064] According to the determined adjustment step , adjust the opening of the water valve at the end 1 of the air-conditioning system.

[0065] Based on the above steps, the air-conditioning system no longer adopts a constant flow control method, but a variable flow control method. By adjusting the opening of the water valve at the terminal 1, the water flow at the terminal 1 can be regulated as needed, and changed according to different loads and different comforts, effectively meeting the needs of different loads and different comforts. Therefore, it can effectively improve the energy saving and comfort of the air-conditioning system.

[0066] In particular, the above variable flow control scheme includes the air supply temperature difference Or supply and return water temperature difference Temperature parameters To adjust the water valve opening at the end 1, the air supply temperature difference Or supply and return water temperature difference It can effectively reflect the changes in actual demands such as load and comfort, and therefore is conducive to achieving a more accurate variable flow control process, thereby more effectively improving the energy saving and comfort of the air-conditioning system.

[0067] Among them, according to the supply air temperature difference Temperature parameters Adjusting the opening of the water valve at the end 1 is beneficial to make the water flow at the end follow the air temperature difference. Changes make the supply air temperature stable at the preset value (i.e., the actual value of the supply air temperature Supply air temperature preset value Roughly equal, the difference between the two Within the allowable range), accurately control temperature and humidity, prevent over-dehumidification and over-cooling, effectively meet indoor temperature and humidity requirements, improve indoor comfort, and reduce energy consumption. Taking night as an example, due to the temperature difference between day and night, the temperature will drop at night, the indoor load will decrease, and the human body's demand for temperature and humidity will also change compared to daytime. In this case, according to the air supply temperature difference To adjust the opening of the water valve at terminal 1, the opening of the water valve at terminal 1 can be dynamically adjusted with the changes in indoor load and comfort. This can reduce terminal energy consumption while meeting comfort requirements, thereby effectively improving the energy saving and comfort of the air-conditioning system.

[0068] According to the supply and return water temperature difference Temperature parameters Adjusting the opening of the water valve at the end 1 is beneficial to make the water flow at the end follow the temperature difference between the supply and return water. Changes make the supply and return water temperature difference stable at the set value (that is, the actual value of the supply and return water temperature difference The preset value of the supply and return water temperature difference Roughly equal, the difference between the two Within the allowable range), it can effectively meet the current indoor temperature and humidity requirements, improve indoor comfort, and reduce terminal energy consumption. Therefore, it can effectively improve the energy saving and comfort of the air-conditioning system.

[0069] It can be seen that the above scheme, by including the air supply temperature difference Or supply and return water temperature difference Temperature parameters , determine the opening adjustment step of the terminal 1 water valve , dynamically adjust the opening of the water valve at the end 1, which can easily realize accurate variable flow control, flexibly meet the needs of different loads and different comforts, and effectively improve the energy saving and comfort of the air-conditioning system.

[0070] In some embodiments, based on the determined temperature parameter , determine the adjustment step include:

[0071] Based on the determined temperature parameters ,Sure value;

[0072] Based on the determined value, determine the adjustment step .

[0073] The above scheme includes the air supply temperature difference Or supply and return water temperature difference Temperature parameters To adjust the opening of the water valve at the end 1, first determine the temperature parameter ,Sure value, so that Become a temperature parameter is a function of the variables, that is, Then, based on the determined value, determine the adjustment step , and then adjust the step size as determined , adjust the opening of the terminal 1 water valve, which makes the terminal water valve opening adjustment step in the process of adjusting the opening of the terminal 1 water valve Supply air temperature difference Or supply and return water temperature difference Related, with supply air temperature difference Or supply and return water temperature difference In this way, the entire opening adjustment process is simpler, more convenient and more accurate. It is not only more feasible, but also can achieve a more accurate dynamic adjustment process, and more effectively improve the energy saving and comfort of the air-conditioning system.

[0074] In the above scheme, according to the determined temperature parameters ,Sure There are many ways to specify the value.

[0075] For example, in some embodiments, based on the determined temperature parameter ,Sure Values ​​include: Based on ,Sure Value. Among them, is the correction factor, ,For example, .

[0076] The above scheme, based on temperature parameters ,Sure When considering not only the temperature parameter , and also use a correction factor greater than 0 Temperature parameters Correction and compensation are made, which is conducive to obtaining a more realistic Value and value, realizing a dynamic adjustment process of water flow that is more in line with actual needs, therefore, being more conducive to improving the energy saving and comfort of the air-conditioning system.

[0077] in, The size can be set according to actual conditions.

[0078] As an example, At this time, use Temperature parameters Correction and compensation can be made to (For example, when the terminal 1 is running at a low flow rate, the actual value of the supply air temperature Supply air temperature preset value difference And the actual value of the supply and return water temperature difference The preset value of the supply and return water temperature difference difference Smaller, that is, Small) to prevent If the value is too small, it will not respond in time, resulting in inaccurate adjustment and control failure, which will affect the reliability of variable flow control. When the terminal is running at a low flow rate, it can effectively adapt to the characteristics of the terminal running at a low flow rate, and obtain the actual needs of the terminal running at a low flow rate. Value and value, to achieve a dynamic adjustment process of water flow that is more in line with small flow operation conditions, improve the situation of inaccurate adjustment or even control failure during small flow operation, improve the accuracy and reliability of the variable flow adjustment process, achieve a more accurate and reliable variable flow adjustment process, and more effectively improve the energy saving and comfort of the air-conditioning system.

[0079] Among them, according to different situations, It can take different values ​​within a range greater than 1.

[0080] For example, in some embodiments, 1 , for example, 1 , or 5 , specifically, for example is 2, 3, 4, 4.5, 6, 7, 8 or 9, etc. The size is more appropriate and can meet the flow regulation needs of most small flow operation conditions. Amplify to a more appropriate level and more effectively improve the energy efficiency and comfort of the air-conditioning system.

[0081] For example, in some embodiments, based on the determined temperature parameter ,Sure Values ​​include: Based on ,Sure Value. Among them, For is a function of a variable; For is a function of a variable, when Including supply air temperature difference hour, The actual value of the current supply air temperature With preset time Previous actual value of supply air temperature The difference, that is, = Actual value of current supply air temperature -Preset time Previous actual value of supply air temperature ,when Including the supply and return water temperature difference hour, The actual value of the current supply and return water temperature difference With preset time Previous actual value of supply and return water temperature difference The difference, that is, = Actual value of current supply and return water temperature difference -Preset time Previous actual value of supply and return water temperature difference .

[0082] The above scheme, based on temperature parameters ,Sure When considering not only the temperature parameter , also considered to be able to represent the preset time Changes in air supply temperature before and after or preset time The temperature difference between the supply and return water before and after (i.e. the return water temperature -Water supply temperature ) parameters of the changes Based on this, the determined The value is not only related to the difference between the actual value of the supply air temperature or the supply and return water temperature difference and the preset value, but also to the change of the supply air temperature or the supply and return water temperature difference within the preset time, so that the subsequent terminal water valve opening adjustment step , which is affected by the difference between the actual value of the supply air temperature or the supply and return water temperature difference and the preset value, as well as the change of the supply air temperature or the supply and return water temperature difference within the preset time. It realizes a variable flow regulation process that comprehensively considers the deviation between the actual value of the supply air temperature or the supply and return water temperature difference and the preset value, as well as the change of the supply air temperature or the supply and return water temperature difference within the preset time. This is conducive to further improving the accuracy and reliability of the variable flow regulation process, so that the terminal flow can be more accurately and reliably adjusted dynamically according to the different needs of indoor load and comfort. Therefore, it is more conducive to improving the energy saving and comfort of the air-conditioning system.

[0083] Moreover, from another perspective, based on ,Sure value, equivalent to using Based on The determined D value is corrected and compensated, which is conducive to obtaining a more realistic value. Value and value, realizing a dynamic adjustment process of water flow that is more in line with actual needs, therefore, being more conducive to improving the energy saving and comfort of the air-conditioning system.

[0084] It can be seen that based on ,Sure value, which is conducive to further improving the energy saving and comfort of the air-conditioning system.

[0085] in, and The form can be diverse.

[0086] For example, in some embodiments, .in, is the correction factor, At this time, the correction factor To correct and compensate temperature parameters , which is conducive to obtaining a more realistic Value and value, to achieve a dynamic adjustment process of water flow that is more in line with actual needs, thus helping to improve the energy efficiency and comfort of the air-conditioning system. In particular, the correction coefficient Able to Together, the temperature parameters Correction and compensation can be carried out to more effectively prevent inaccurate adjustment and control failure, thereby helping to further improve the accuracy and reliability of the variable flow regulation process.

[0087] in, The size can be set according to actual conditions.

[0088] As an example, .at this time, The size is appropriate, not too small, which is conducive to better correction and compensation , and get a more realistic Value and value, to achieve a dynamic adjustment process of water flow that is more in line with actual needs, and better improve the energy saving and comfort of the air-conditioning system.

[0089] Furthermore, in some embodiments, At this time, use Temperature parameters Correction and compensation can be made to Amplify to prevent If the value is too small, it will not respond in time, resulting in inaccurate adjustment and control failure, which will affect the reliability of variable flow control, thereby achieving a more accurate and reliable variable flow adjustment process.

[0090] Among them, according to different situations, It can take different values ​​within a range greater than 1. For example, in some embodiments, 1 ,For example, ,or, , specifically, for example is 1.1, 1.2, 1.3, 1.5, 2, 3, 4, 4.5, 6, 7, 8 or 9. At this time, The size is more suitable, Appropriate amplification can not only meet the flow regulation needs of most small flow operation conditions, but also Appropriate amplification can prevent inaccurate adjustment and control failure, while not over-amplifying to cause over-adjustment. Therefore, it is beneficial to improve the accuracy and reliability of variable flow regulation and enhance the energy efficiency and comfort of the air-conditioning system.

[0091] In addition, in some embodiments, = .in, is the correction factor, At this time, use a correction factor greater than 0 Parameters Correction and compensation are helpful to obtain a more realistic Value and value, realizing a dynamic adjustment process of water flow that is more in line with actual needs, therefore, being more conducive to improving the energy saving and comfort of the air-conditioning system.

[0092] For example, in some embodiments, At this time, use Parameters Correction and compensation can be made to Value amplification to prevent If the value is too small, it will not respond in time, resulting in inaccurate adjustment and control failure, which will affect the reliability of variable flow control. Internal air supply temperature or preset time The change of internal supply and return water temperature difference is small, therefore, The value is generally small, so Set to greater than 1, it can effectively adapt to normal situations The characteristic of a small value can prevent inaccurate adjustment or even control failure, improve the accuracy and reliability of the variable flow adjustment process, achieve a more accurate and reliable variable flow adjustment process, and effectively improve the energy saving and comfort of the air-conditioning system.

[0093] Furthermore, in some embodiments, .in, and are correction coefficients, , In this way, Greater than 1, yes To zoom in, you can Not too large to avoid Over-amplification leads to over-regulation, that is, at this time, The size is more suitable, you can Zoom in to the appropriate level to achieve More reasonable corrections enable more accurate and reliable dynamic adjustment of flow, further improving the energy efficiency and comfort of the air-conditioning system.

[0094] Furthermore, in some embodiments, and / or, .at this time, and The size is more appropriate, accordingly, The size is more suitable, Amplifying it to a more appropriate level enables more accurate and reliable flow regulation at a more appropriate frequency, thereby more effectively improving the energy efficiency and comfort of the air-conditioning system.

[0095] As mentioned earlier, Preset time for characterization Changes in air supply temperature before and after or preset time Parameters of the supply and return water temperature difference before and after, among which, and The value can be set according to actual situation.

[0096] For example, in some embodiments, s. At this time, a value of 10s is more appropriate, the time is neither too short nor too long, and it is convenient to obtain a parameter capable of effectively representing the change of the supply air temperature over time , so as to realize a flow dynamic adjustment process more in line with actual requirements.

[0097] Specifically, in some embodiments, s. At this time, a value of 10s is more appropriate, the time is neither too short nor too long, and it is convenient to obtain a parameter capable of effectively representing the change of the supply air temperature over time , so as to realize a flow dynamic adjustment process more in line with actual requirements.

[0098] In addition, in some embodiments, s. At this time, a value of 10s is more appropriate, the time is neither too short nor too long, and it is convenient to obtain a parameter capable of effectively representing the change of the supply air temperature over time , so as to realize a flow dynamic adjustment process more in line with actual requirements.

[0099] Specifically, in some embodiments, , for example, 10s, 15s, 20s or 25s. At this time, a value of 10s is more appropriate, the time is neither too short nor too long, and it is convenient to obtain a parameter capable of effectively representing the change of the supply air temperature over time , so as to realize a flow dynamic adjustment process more in line with actual requirements.

[0100] In the foregoing embodiments, based on the determined value, the adjustment step is determined.

[0101] When , the adjustment step is determined as a constant ; and / or,

[0102] When , the adjustment step is determined as .

[0103] Wherein, , it is indicated that the difference between the actual value and the preset value of the supply air temperature or the supply and return water temperature difference of the terminal 1 is large, and in this case, the requirement for the adjustment speed is high, so the adjustment step is determined as , which can quickly adjust the water flow to a situation capable of meeting the actual load and comfort requirements, and better improve the comfort and reduce the energy consumption.

[0104] And , it is indicated that the difference between the actual value and the preset value of the supply air temperature or the water supply and return temperature difference of the terminal 1 is small, and the actual value and the actual demand of the water flow rate are not greatly deviated. In this case, the requirements for the adjustment speed and the adjustment accuracy can be appropriately reduced, and thus the adjustment step is determined as a constant . In this case, the adjustment process can be effectively simplified, and a more simple variable flow rate adjustment process can be realized while meeting the requirements for the adjustment speed and the adjustment accuracy of the actual load and comfort.

[0105] wherein the constant can be set according to actual conditions.

[0106] For example, in some embodiments, . In this way, the adjustment step when the water flow rate is less than or equal to is greater than or equal to , and less than or equal to , that is, . In this case, the size of the adjustment step is more appropriate, and is neither too large nor too small, which is beneficial to realize a more simple and more accurate variable flow rate adjustment process.

[0107] Further, in some embodiments, . In this case, , the size of the adjustment step is more appropriate, which is beneficial to realize a more simple and more accurate variable flow rate adjustment process.

[0108] In the foregoing embodiments, when the opening degree of the water valve of the terminal 1 of the air conditioning system is adjusted according to the determined adjustment step , the opening degree of the water valve of the terminal 1 of the air conditioning system can be adjusted once every interval time . In this way, the frequency of adjustment and control can be reduced, which is not only beneficial to prevent the terminal 1 water valve from moving back and forth and affecting the service life, but also beneficial to simplify the control process and reduce the cost.

[0109] wherein can be set according to actual conditions.

[0110] For example, in some embodiments, , 3s~5s, or 5s~20s, and specifically, for example, 4, 6, 9, 10, 13, 15, 18 or 19s, etc. In this case, is more appropriate, and the action frequency is more appropriate, which is more beneficial to prolong the service life of the terminal water valve, and simplify the control process and reduce the cost.

[0111] In the foregoing embodiments, the opening degree of the water valve of the terminal 1 of the air conditioning system is adjusted according to the determined adjustment step , the opening of the water valve of the terminal 1 of the air conditioning system is adjusted to be larger

[0112] When , the opening of the water valve of the terminal 1 of the air conditioning system is adjusted to be smaller

[0113] When , the opening of the water valve of the terminal 1 of the air conditioning system is adjusted to be smaller

[0114] The above steps take whether the difference between the actual heat exchange amount and the actual demand is greater than 0 as the demarcation line for whether the water valve of the terminal is adjusted to be larger or smaller. The difference between the actual heat exchange amount and the actual demand can represent whether the actual heat exchange amount at the terminal 1 is higher or lower than the actual demand, wherein when the actual heat exchange amount is lower than the actual demand, it indicates that the indoor load is large and the current actual heat exchange amount cannot meet the indoor heat exchange demand, that is, it indicates that the actual heat exchange amount at the terminal 1 is lower than the actual demand, and in this case, the water valve opening of the terminal 1 is adjusted to be larger to increase the water flow so that the actual heat exchange amount becomes larger and consistent with the actual demand; and when the actual heat exchange amount is higher than the actual demand, it indicates that the indoor load is small and the current actual heat exchange amount exceeds the indoor heat exchange demand, that is, it indicates that the actual heat exchange amount at the terminal 1 is higher than the actual demand, and in this case, the water valve opening of the terminal 1 is adjusted to be smaller to reduce the water flow so that the actual heat exchange amount becomes smaller and consistent with the actual demand. It can be seen that the above steps take whether the difference between the actual heat exchange amount and the actual demand is greater than 0 as the demarcation line for whether the water valve of the terminal is adjusted to be larger or smaller, which can adjust the actual heat exchange amount to be consistent with the actual demand, effectively improving energy saving and comfort.

[0115] In the foregoing embodiments, the temperature parameter may comprise:

[0116] In the foregoing embodiments, the temperature parameter may comprise:

[0117] After the water valve of the terminal 1 of the air conditioning system is opened, the supply air temperature of the terminal 1 of the air conditioning system is detected after a delay time , as the actual value of the supply air temperature of the terminal 1 of the air conditioning system Alternatively, the return water temperature and the supply water temperature of the terminal 1 of the air conditioning system are detected, and the difference between the detected return water temperature and the supply water temperature of the terminal 1 of the air conditioning system is taken as the actual value of the supply-return water temperature difference of the terminal 1 of the air conditioning system

[0118] The difference between the actual value of the supply air temperature of the terminal 1 of the air conditioning system and the preset value of the supply air temperature is taken as the supply air temperature difference , and the supply air temperature difference is determined as the temperature parameter​​​​​ , or, the actual value of the supply and return water temperature difference of the terminal 1 of the air conditioning system , as the supply and return water temperature difference difference value , and the supply and return water temperature difference difference value is determined as the temperature parameter .

[0119] The above steps do not immediately detect the supply air temperature or the supply and return water temperature after the terminal water valve is opened, but delay for a time before starting to detect the supply air temperature or the supply and return water temperature. This can prevent the supply air temperature or the supply and return water temperature from fluctuating greatly due to the initial stage of the water valve being opened, and the terminal 1 not yet being stable, which would affect the accuracy of the detection. Therefore, it is beneficial to detect a more accurate supply air temperature or supply and return water temperature, and further obtain a more accurate temperature parameter . This is beneficial to achieve a more precise variable flow regulation process, and more effectively improve energy saving and comfort.

[0120] The delayed time may be set according to actual conditions.

[0121] As an example, for example, , or , specifically, for example, 40, 45, 50, 52, 55, 63, 65, 68, 70, 75, 80, 85s, etc. At this time, the size of the delay time is more appropriate, which is beneficial to detecting a more accurate supply air temperature or supply and return water temperature under a stable working state, and further preventing the delay from being too long, which would cause the regulation to be untimely, waste energy, and affect comfort.

[0122] As a further improvement to the foregoing embodiments, see Figure 1 In some embodiments, the control method further comprises:

[0123] dividing the plurality of terminals 1 of the air conditioning system into a plurality of regulation zones 5, so that the total rated flow of each regulation zone 5 in the plurality of regulation zones 5 is consistent;

[0124] based on the pressure difference of each regulation zone 5, adjusting the opening of the total water valve of each regulation zone 5, so that the pressure difference of each regulation zone 5 is stable.

[0125] The above steps are controlled in zones according to the flow size of the terminal 1, so that the total rated flow size of each regulation zone 5 is basically consistent, and the opening degree of the total water valve (located on the dry road of each regulation zone 5 and used for controlling the total water flow of each regulation zone 5) is adjusted based on the pressure difference of each regulation zone 5, so that the pressure difference of each regulation zone 5 is stable, and the pressure difference fluctuation of each regulation zone 5 is prevented from being too large, which causes local water imbalance. This way of monitoring and adjusting the pressure difference in zones can realize controllable overall waterway regulation, optimize water flow, reduce energy consumption, improve energy efficiency, and improve system operation reliability.

[0126] The control method of each of the foregoing embodiments can be completed under the control of a controller of the air conditioning system. The corresponding controller includes a memory and a processor coupled to the memory, and the processor is configured to execute the control method of any embodiment based on instructions stored in the memory.

[0127] In addition, the present application also provides a storage medium, and the corresponding storage medium stores computer instructions, and the computer instructions are executed by the processor to execute the control method of any embodiment.

[0128] Next, the present application will be further described in combination with the embodiments shown in the accompanying drawings. Figures 1-2

[0129] As shown in Figure 1 In this embodiment, the air conditioning system is a heating, ventilation and air conditioning system, which includes a plurality of terminals 1, and the plurality of terminals 1 are divided into two regulation zones 5, each regulation zone 5 includes a plurality of parallel terminals 1, and the rated flow of each regulation zone 5 is basically consistent (the same, or although different, but the deviation is within the allowable range, for example, the deviation is within Specifically, Figure 1 The first regulation zone 5 on the left in the embodiment includes five terminals 1, and the rated flows of the five terminals 1 are q1, q2, q3, q4 and q5 respectively. The total rated flow Q1 of the first regulation zone 5 is the sum of the rated flows of the five terminals 1, that is, Q1 = q1+q2+q3+q4+q5, and the total pressure difference of the first regulation zone 5 (i.e. the pressure difference between the water inlet and the water outlet of the corresponding regulation zone 5) is △P1, and the flow regulation range is 20%~30%Q1~ Q1, in addition, Figure 1 ​The second regulating area 5 located on the right side includes four terminals 1, and the rated flow rates of the four terminals 1 are q1, q5, q4 and q5 respectively. The total rated flow rate Q2 of the second regulating area 5 is the sum of the rated flow rates of the four terminals 1, that is, Q2 = q1 + q5 + q4 + q5. Q2 is consistent with Q1, and the total pressure difference of the second regulating area 5 is ΔP2, and the flow rate regulating range is 20% ~ 30% Q2 ~ Q2. Each regulating area 5 is equipped with a total water valve (not shown) located on the main line, and each terminal 1 of each regulating area 5 is equipped with a water valve (not shown) located on the branch line of the corresponding terminal 1. The total water valve and the water valve of the terminal 1 are proportional valves. In addition, each regulating area 5 is also equipped with a pressure difference control device 4 for detecting and controlling the total pressure difference of each regulating area 5. At the same time, each terminal 1 is provided with a temperature measuring element (such as a temperature sensing bag) to detect the air supply temperature, return water temperature and water supply temperature in real time.

[0130] Based on the above settings, the embodiment adjusts the flow rate of each terminal 1 according to the air supply temperature difference and the supply-return water temperature difference difference , so that each terminal 1 can effectively meet the needs of different loads and different comfort levels, and in the process of adjusting the flow rate, the pressure difference of each regulating area 5 is monitored and adjusted to achieve the goals of energy saving and emission reduction, improving comfort and reliability, etc.

[0131] Next, the mode of adjusting the flow rate according to the air supply temperature difference (the mode can be referred to as air supply temperature difference control variable flow rate adjustment operation mode), the mode of adjusting the flow rate according to the supply-return water temperature difference difference (the mode can be referred to as supply-return water temperature difference control variable flow rate adjustment operation mode) and the process of partition control will be introduced.

[0132] First, the air supply temperature difference control variable flow rate adjustment operation mode is introduced.

[0133] In this operation mode, the water valve opening degree of the terminal 1 is adjusted according to the air supply temperature difference , and the adjustment is performed once every 5s.

[0134] After entering this operation mode, the water valve of the terminal 1 is opened, and the air supply temperature detection is started after a delay of 60s to obtain the actual value of the air supply temperature of the terminal 1 ;

[0135] The air supply temperature difference is determined according to the formula, and the parameter P is determined according to the formula = actual value of air supply temperature - actual value of air supply temperature 10s ago ​​

[0136] According to the formula , the value of is calculated, wherein , , ;

[0137] According to the calculated value of , it is determined whether the terminal 1 water valve is adjusted larger or smaller, and the adjustment increment of each time, that is, the adjustment step .

[0138] Specifically, it is determined whether the value of is greater than 0 to determine whether the terminal 1 water valve opening is adjusted larger or smaller, and it is determined whether the value of is greater than or equal to 1 to determine the size of the adjustment step .

[0139] More specifically, when , the actual value of the supply air temperature > the preset value of the supply air temperature , the indoor temperature has not been reduced to the required temperature, the indoor load is large, and the current heat exchange capacity cannot meet the actual heat exchange demand, so the opening of the water valve is adjusted larger, and the adjustment step of each adjustment is determined as follows:

[0140] When , the difference between the actual value of the supply air temperature and the preset value of the supply air temperature is small, at this time, the adjustment step is determined to be 0.5%, that is, the opening of the terminal 1 water valve is adjusted larger by 0.5%;

[0141] When , the difference between the actual value of the supply air temperature and the preset value of the supply air temperature is large, at this time, the adjustment step is determined to be , that is, the opening of the terminal 1 water valve is adjusted larger by to make the actual heat exchange capacity quickly and infinitely approach the actual heat exchange demand.

[0142] And when , the actual value of the supply air temperature < the preset value of the supply air temperature , the indoor load is small, the current heat exchange capacity has exceeded the actual heat exchange demand, the indoor temperature has been lower than the required temperature, the indoor is in a supercooling state, there is a risk of condensation, and there is unnecessary energy waste, which will also bring an uncomfortable experience, so the opening of the water valve is adjusted smaller, and the adjustment step The difference between the actual value of the supply air temperature

[0143] When the actual value of the supply air temperature is smaller than the preset value of the supply air temperature , the adjustment step is determined to be 0.5%, that is, the water valve opening degree of the terminal 1 is reduced by 0.5%.

[0144] When the actual value of the supply air temperature is larger than the preset value of the supply air temperature , the adjustment step is determined to be , that is, the water valve opening degree of the terminal 1 is reduced by to quickly and infinitely approach the actual heat exchange demand.

[0145] It can be seen that in this embodiment, the supply air temperature difference control variable flow adjustment mode is used to collect the supply air temperature, determine the difference between the supply air temperature and the set value, and compensate and correct the terminal water valve adjustment step according to the difference, adjust the terminal water valve opening degree, and control the water flow size. The flow can be dynamically adjusted according to the load size, and the indoor load processing target set value is reached. In this way, the temperature and humidity can be accurately controlled, the problem of excessive dehumidification and excessive refrigeration can be effectively solved, the indoor comfort is improved, and the terminal energy consumption is reduced. The corresponding effect is intuitively embodied in Figures 3-6 .

[0146] Figures 3-4 and Figures 5-6 respectively show the supply air and heat exchange when the traditional control mode and the supply air temperature difference control mode of this embodiment are used.

[0147] As can be seen from Figure 3 and Figure 5 , this is an example of taking the preset value of the supply air temperature as 14℃.

[0148] As shown in Figure 3 and Figure 4 , when the traditional control mode is used, the terminal 1 feedbacks slowly during operation. After a period of continuous operation, the indoor load decreases, the supply air temperature deviates negatively from the preset value, and the actual heat exchange deviates from the indoor load. At this time, it belongs to overcooling, and a part of the energy consumption is unnecessary. After the outdoor unit receives the signal and adjusts the frequency, the system can gradually stabilize and meet the indoor load demand again. Such an operation process is not energy efficient, has a certain hysteresis, and affects the comfort.

[0149] And as shown in Figure 5 and Figure 6As shown, when the supply air temperature difference control method of this embodiment is adopted, the water valve opening is adjusted according to the supply air temperature difference to realize the flow regulation process with the supply air temperature as the target. The system can adjust the flow size as the real-time indoor load changes, so that the supply air temperature and actual heat exchange capacity are infinitely close to and stable at the set value.

[0150] Compare Figure 3 and Figure 5 as well as Figure 4 and Figure 6 It can be seen that compared with the conventional method, after adopting the supply air temperature difference control method of this embodiment, the deviation between the actual supply air temperature value and the set value and between the actual heat exchange amount and the indoor load is effectively reduced, and the consistency is effectively enhanced. Therefore, it can effectively improve comfort, reduce energy consumption, and improve energy saving.

[0151] Next, we will introduce the supply and return water temperature difference control variable flow regulation operation mode.

[0152] In this operation mode, according to the supply and return water temperature difference , adjust the opening of the water valve at the end 1, and adjust it every 5 seconds.

[0153] After entering this operation mode, the water valve at terminal 1 is opened, and the supply and return water temperature detection is started after a delay of 60 seconds;

[0154] According to the formula "supply and return water temperature difference = return water temperature - supply water temperature", the actual value of the supply and return water temperature difference is calculated. , and according to the formula, the supply and return water temperature difference = Actual value of supply and return water temperature difference -Preset value of supply and return water temperature difference , calculate the supply and return water temperature difference , and, according to the formula = Actual value of supply and return water temperature difference - Actual value of the supply and return water temperature difference before 10s , determine the parameter P;

[0155] According to the formula 2. Calculate Value, where , 1 , ;

[0156] According to the calculated value, determine whether the terminal 1 water valve is adjusted up or down, and determine the adjustment increment each time, that is, the adjustment step .

[0157] Specifically, judge Is the value greater than 0 to determine whether to increase or decrease the opening of the water valve at the end 1, and to judge Is it greater than or equal to 1 to determine the adjustment step size.

[0158] More specifically, in When the actual value of the supply and return water temperature difference >Preset value of supply and return water temperature difference , the indoor load is large, and the current heat exchange capacity cannot meet the actual heat exchange demand. Therefore, the water valve opening is increased, and the adjustment step is increased each time. Determine as follows:

[0159] when When the actual value of the supply and return water temperature difference The preset value of the supply and return water temperature difference The difference between them is small, in this case, the stride will be adjusted Determine it to be 0.5%, that is, increase the opening of the water valve at terminal 1 by 0.5%;

[0160] when When the actual value of the supply and return water temperature difference The preset value of the supply and return water temperature difference The difference between the two is large, in this case, the stride will be adjusted Determined , that is, according to The water valve opening at the end 1 is increased in steps to make the actual heat exchange amount quickly and infinitely approach the actual heat exchange demand.

[0161] And in When the actual value of the supply and return water temperature difference >Preset value of supply and return water temperature difference , the indoor load is small, and the current heat exchange has exceeded the actual heat exchange demand. Therefore, the water valve opening is reduced, and the adjustment step is reduced each time. Determine as follows:

[0162] when When the actual value of the supply and return water temperature difference The preset value of the supply and return water temperature difference The difference between them is small, in this case, the stride will be adjusted Determine it to be 0.5%, that is, reduce the opening of the water valve at terminal 1 by 0.5%;

[0163] when When the actual value of the supply and return water temperature difference The preset value of the supply and return water temperature difference The difference between the two is large, in this case, the stride will be adjusted Determined , that is, according to The step size of the terminal 1 water valve opening degree is reduced to make the actual heat exchange amount quickly and infinitely approach the actual heat exchange demand.

[0164] It can be seen that in this embodiment, the supply and return water temperature difference control variable flow adjustment operation mode can realize dynamic adjustment of the flow according to the size of the load, achieve the indoor load processing target set value, reduce energy consumption, and improve indoor comfort, and the corresponding effects are intuitively embodied in Figures 7-8 .

[0165] Figure 7 and Figure 8 respectively show the supply and return water temperature difference when the traditional control mode and the supply and return water temperature difference control mode of this embodiment are used.

[0166] It can be seen that this is an example of explaining the case where the supply and return water temperature difference preset values are both 5℃ (for example, the supply water temperature is 12℃ and the return water temperature is 17℃). Figure 7 Figure 8 As shown in , when the traditional control mode is used, there is a lag, and the terminal 1 can have a large deviation between the actual value and the preset value of the supply and return water temperature difference, causing overcooling and condensation problems, affecting comfort, and wasting energy.

[0167] Figure 7 As shown in , when the supply and return water temperature difference control mode of this embodiment is used, the water valve opening degree is adjusted according to the supply and return water temperature difference, realizing the flow adjustment process with the supply and return water temperature difference as the target, so that the terminal can adjust the flow size according to the real-time load of the indoor, and the actual value of the supply and return water temperature difference can infinitely approach and stabilize at the set value.

[0168] Figure 8 Comparing and

[0169] , it can be seen that compared with the conventional mode, after using the supply and return water temperature difference control mode of this embodiment, the deviation between the actual value and the set value of the supply and return water temperature difference is effectively reduced, and the consistency is effectively enhanced, so that the comfort can be effectively improved, the energy consumption can be reduced, and the energy saving performance can be improved. Figure 7 Figure 8 The above-mentioned supply air temperature difference control variable flow adjustment operation mode and supply and return water temperature difference control variable flow adjustment operation mode can select one of them according to the actual demand to realize variable flow control.

[0170] Next, the partition control is introduced.

[0171] Next, the partition control is introduced.

[0172] ​In the terminal flow dynamic adjustment, the differential pressure of each control area 5 is monitored, and the actual value of the differential pressure of each control area 5 is compared with the set value to determine whether there is a discrepancy. If there is a discrepancy, the opening of the total water valve of the corresponding control area 5 is adjusted. Specifically, if the differential pressure is too large, the opening of the total water valve is reduced to reduce the differential pressure. Conversely, if the differential pressure is too small, the opening of the total water valve is increased to increase the differential pressure. In this way, the overall differential pressure of the system is maintained stable.

[0173] The stability of the differential pressure of each control area 5 is related to the hydraulic balance of each control area 5. If the differential pressure is stable, the hydraulic balance is high. If the hydraulic balance is not balanced, the same driving force may not be able to drive the required water flow into the control area 5, affecting the flexibility and response speed of the variable flow regulation process, and affecting the comfort, energy saving and reliability. Therefore, by performing corresponding partition control, the problem of hydraulic imbalance can be reduced, the flexibility and response speed of the variable flow regulation process can be improved, and the purposes of energy saving, emission reduction, comfort improvement and reliability improvement can be achieved.

[0174] It can be seen that, in this embodiment, the supply air temperature or the supply and return water temperature can be collected in real time, and the terminal water valve is controlled in linkage. According to the indoor load demand, the terminal water valve opening is dynamically adjusted in a compensation and correction manner, the water flow size is adjusted, the terminal flow is dynamically adjusted according to the indoor load size, the inaccurate adjustment and out-of-control adjustment of the terminal in the small flow range are effectively improved, and the water system is controlled in partition. According to the terminal flow size, the flow size of each area is basically consistent, the local hydraulic balance is maintained when the terminal flow changes, the overall water system regulation is controllable, the differential pressure is accurately controlled, the water flow is optimized, the energy consumption is reduced, and the overall energy efficiency and reliability of the system are improved.

[0175] The above only describes exemplary embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling an air conditioning system, characterized in that: include: Determine temperature parameters , the temperature parameter Including supply air temperature difference Or supply and return water temperature difference , supply air temperature difference The actual value of the supply air temperature at the end of the air conditioning system (1) Supply air temperature preset value The difference between supply and return water temperature The actual value of the supply and return water temperature difference of the air conditioning system The preset value of the supply and return water temperature difference difference; Based on the determined temperature parameters ,Sure Values, including: Based on ,or, ,Sure value; Based on the determined value, determine the adjustment step , including: When Determined as a constant 1, and / or, in When Determined ; According to the determined adjustment step , adjusting the opening of the water valve at the end (1) of the air conditioning system; in, ; For is a function of a variable; For is a function of a variable, when Including supply air temperature difference hour, The actual value of the current supply air temperature With preset time Previous actual value of supply air temperature The difference, when Including the supply and return water temperature difference hour, The actual value of the current supply and return water temperature difference With preset time Previous actual value of supply and return water temperature difference difference.

2. The control method according to claim 1, characterized in that: and / or, , and / or, , .

3. The control method according to claim 2, characterized in that: 1 and / or, and / or, .

4. The control method according to claim 3, characterized in that: and / or, ,in, , .

5. The control method according to claim 4, characterized in that: and / or, and / or, .

6. The control method according to claim 1, characterized in that: s; or, s.

7. The control method according to claim 6, characterized in that: ;or, .

8. The control method according to any one of claims 1 to 7, characterized in that: 。 9. The control method according to claim 8, characterized in that: 。 10. The control method according to any one of claims 1 to 7, characterized in that: In accordance with the determined adjustment step , when adjusting the opening of the water valve at the end (1) of the air conditioning system, each interval , adjust the opening of the water valve at the end (1) of the air conditioning system once.

11. The control method according to claim 10, characterized in that: 。 12. The control method according to claim 11, characterized in that: 。 13. The control method according to any one of claims 1 to 7, characterized in that: According to the determined adjustment step , adjusting the opening of the water valve at the end (1) of the air conditioning system includes: exist When the water valve at the end of the air conditioning system (1) is opened wider ; exist When the water valve at the end of the air conditioning system (1) is opened, the opening is reduced. .

14. The control method according to any one of claims 1 to 7, characterized in that: Determine temperature parameters include: After the water valve at the end (1) of the air conditioning system is opened, the delay time After that, the air supply temperature of the terminal (1) of the air conditioning system is detected as the actual value of the air supply temperature of the terminal (1) of the air conditioning system. Alternatively, the return water temperature and the supply water temperature of the terminal (1) of the air-conditioning system are detected, and the difference between the return water temperature and the supply water temperature of the terminal (1) of the air-conditioning system is used as the actual value of the supply and return water temperature difference of the terminal (1) of the air-conditioning system. ; The actual value of the air supply temperature at the end (1) of the air conditioning system Supply air temperature preset value The difference between , and the air supply temperature difference Determined as temperature parameter Alternatively, the actual value of the supply and return water temperature difference at the end (1) of the air conditioning system , as the supply and return water temperature difference and the supply and return water temperature difference Determined as temperature parameter .

15. The control method according to claim 14, characterized in that: 。 16. The control method according to claim 15, characterized in that: 。 17. The control method according to any one of claims 1 to 7, characterized in that: The control method further includes: Dividing the plurality of terminals (1) of the air conditioning system into a plurality of control zones (5), so that the total rated flow of each control zone (5) in the plurality of control zones (5) is consistent; According to the pressure difference of each control zone (5), the opening of the main water valve of each control zone (5) is adjusted to ensure that the pressure difference of each control zone (5) is kept stable.

18. A controller, characterized in that: The system comprises a memory and a processor coupled to the memory, wherein the processor is configured to execute the control method according to any one of claims 1 to 17 based on instructions stored in the memory.

19. An air conditioning system, characterized in that: Comprising a controller as claimed in claim 18.

20. A storage medium, characterized in that The storage medium stores computer instructions, and the computer instructions are executed by the processor to implement the control method according to any one of claims 1 to 17.

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