Method and device for obtaining flow distribution of air conditioning water system

Abstract

The present application provides a method and device for obtaining the flow distribution of an air-conditioning water system. The method includes creating an external unit flow function between the pressure drop and water flow of the external unit, and creating an internal unit flow function including the pressure drop and water flow of the internal unit for each internal unit; obtaining the operating parameters of the air-conditioning water system when it is in operation; obtaining the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit based on the obtained operating parameters, the external unit flow function and the internal unit flow function of each internal unit; and obtaining the flow distribution of the air-conditioning water system to the internal units connected to the air-conditioning water system based on the external unit flow function with a determined coefficient and the internal unit flow function with a determined coefficient of each internal unit. The method can accurately obtain the flow distribution of the air-conditioning water system without knowing the detailed information of the pipes, valves and other components of the water system, such as the friction coefficient, local resistance coefficient and drop, etc., and is suitable for obtaining the flow distribution of any unknown air-conditioning water system.

Description

Technical Field

[0001] The present application relates to flow distribution of a water system, and in particular to obtaining flow distribution of an air conditioning water system. Background Art

[0002] In the field of air conditioning, various components of the air conditioning system are adjusted so that each air conditioning control unit can obtain the required cooling and heating. Summary of the invention

[0003] In order to enable each air conditioning control unit to obtain the required cooling and heating, the inventors understand that one implementation method is to adjust the various components of the air conditioning system through PID control, so that the air conditioning system provides the required cooling and heating for each air conditioning control unit. This implementation method does not require obtaining the flow distribution of the water system of the air conditioning system.

[0004] The inventors have found that the air conditioning system can operate in different operating states to output the same amount of heat / cold, and the power consumption generated by the air conditioning system in these different operating states will be different. Therefore, the preferred operating conditions of the air conditioning system can be obtained so that the air conditioning system consumes the lowest power when outputting the same amount of heat / cold, thereby achieving energy-saving optimization of the air conditioning system. The inventors have also found that obtaining the flow distribution of each component of the air conditioning water system can help obtain the operating conditions in which the air conditioning system consumes the least power when providing the required cooling and heat to each air conditioning control unit, thereby achieving energy-saving optimization of the air conditioning system.

[0005] The inventors also found that in the air conditioning water system of the air conditioning system, there is a functional relationship between the pressure drop and the water flow of each component (including the outdoor unit and N indoor units), for example, there is an outdoor unit function between the pressure drop and the water flow of the outdoor unit, and there is an indoor unit function between the pressure drop and the water flow of each of the N indoor units. In addition, in the air conditioning water system, the N indoor units are connected in parallel through water pipes. When one or more indoor units among the N indoor units are connected to the water system, there is a correlation equation between the respective pressure drops of the one or more indoor units connected. Therefore, the inventors found that by obtaining the indoor unit coefficient in the indoor unit function of each indoor unit to obtain the indoor unit function of each indoor unit with a determined coefficient, the flow distribution of the air conditioning water system to the indoor units connected to the air conditioning water system can be obtained.

[0006] The inventors have observed that in traditional calculations, it is necessary to obtain detailed information about the pipes, valves and other components of the water system, such as the friction coefficient, local resistance coefficient, and drop, etc., to determine the coefficients in the function between the pressure drop of each component of the water system and the water flow rate. However, in many complex systems, or in water systems that have been completed, it is difficult to obtain detailed information about the pipes, valves and other components of the water system, and thus it is difficult to obtain the coefficients in the function between the pressure drop of each component of the water system and the water flow rate through traditional calculation methods, and thus it is difficult to obtain the flow distribution of the water system. In addition, if the detailed information about the pipes, valves and other components of the water system is not fully or accurately obtained, the accuracy of the coefficients in the obtained function will be reduced, thereby reducing the accuracy of the obtained flow distribution of the water system.

[0007] The present application provides a method and device for obtaining the flow distribution of an air conditioning water system, without the need to obtain detailed information of the pipes, valves and other components of the water system, such as friction coefficient, local resistance coefficient and drop, etc., as in traditional calculations. The present application can easily and accurately obtain the flow distribution of the air conditioning water system to each indoor unit connected to the air conditioning water system, and is applicable to obtaining the flow distribution of any unknown air conditioning water system.

[0008] According to a first aspect of the present application, the present application provides a method for obtaining flow distribution of an air conditioning water system, the air conditioning water system comprising an outdoor unit and N indoor units, the method comprising: (1) creating an outdoor unit flow function between a pressure drop and a water flow of the outdoor unit, and creating an indoor unit flow function between a pressure drop and a water flow of the indoor unit for each of the N indoor units, the outdoor unit flow function comprising an outdoor unit coefficient to be determined, and the indoor unit flow function comprising an indoor unit coefficient to be determined; (2) operating the air conditioning water system and obtaining operating parameters of the air conditioning water system during operation; (3) obtaining an outdoor unit coefficient of the outdoor unit flow function and an indoor unit coefficient of the indoor unit flow function of each indoor unit based on the obtained operating parameters, the outdoor unit flow function and the indoor unit flow function of each indoor unit, thereby obtaining an outdoor unit flow function with a determined coefficient and an indoor unit flow function with a determined coefficient for each indoor unit; and (4) obtaining flow distribution of the air conditioning water system to the indoor units connected to the air conditioning water system based on the outdoor unit flow function with a determined coefficient and the indoor unit flow function with a determined coefficient for each indoor unit.

[0009] According to the first aspect of the present application, in the step (2), obtaining the operating parameters of the air conditioning water system during operation includes: obtaining the water flow and power consumption of a water pump during operation of the air conditioning water system. The water pump is configured to deliver water to the outdoor unit and the N indoor units.

[0010] According to the first aspect of the present application, in the step (2), operating the air conditioning water system includes operating the air conditioning water system under a plurality of operating conditions, each of the plurality of operating conditions being composed of a plurality of parameters, the plurality of parameters including a combination configuration of the working state of the indoor unit and the operating frequency of the water pump. The combination configuration of the working state of the indoor unit is a combination formed by connecting or disconnecting each of the N indoor units with the air conditioning water system.

[0011] According to the first aspect of the present application, the combination configuration of the indoor unit working state includes several predetermined combination configurations, and the operating frequency of the water pump includes several predetermined operating frequencies.

[0012] According to the first aspect of the present application, operating the air-conditioning water system under a group of operating conditions among the several operating conditions includes the following steps: connecting or disconnecting each indoor unit with the air-conditioning water system correspondingly under one of the several predetermined combination configurations; and operating the water pumps one by one under the several predetermined operating frequencies.

[0013] According to the first aspect of the present application, when obtaining the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit in the step (3), the following steps are performed: (3-1) obtaining the pressure drop of the water pump based on the water flow rate and power consumption of the water pump when the air-conditioning water system is in operation, and obtaining the correlation between the water flow rates of the external unit, the N internal units and the water pump and the correlation between the pressure drops of the external unit, the N internal units and the water pump when the air-conditioning water system is in operation; and (3-2) obtaining the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit based on the water flow rate and pressure drop of the water pump when the air-conditioning water system is in operation, the correlation between the water flow rates of the external unit, the N internal units and the water pump when the air-conditioning water system is in operation, and the correlation between the pressure drops of the external unit, the N internal units and the water pump, and the external unit flow function and the internal unit flow function of each internal unit.

[0014] According to the first aspect of the present application, the water pump includes a variable frequency water pump, which has four parameters, namely, operating frequency, water flow, power consumption and pressure drop. When two of the four parameters are determined, the other two of the four parameters are also determined accordingly.

[0015] According to the first aspect of the present application, in step (1), the external machine flow function created is Δp out =a out *Q out 2 +b out , where Δpout is the pressure drop of the external unit, Q out is the water flow rate of the external unit, a out , b out is the external machine coefficient of the external machine flow function; and the internal machine flow function of each internal machine created is Δp i =a i *Q i 2 +b i , i = 1, 2, ..., n, where i is the serial number of the indoor unit, Δp i is the pressure drop of the internal unit i, Q i is the water flow rate of indoor unit i, a i , b i is the internal machine coefficient of the internal machine flow function of internal machine i.

[0016] According to the first aspect of the present application, the obtained flow distribution of the air-conditioning water system to the indoor units connected to the air-conditioning water system can be used for energy-saving optimization of the air-conditioning system.

[0017] According to a second aspect of the present application, the present application provides an air-conditioning system, comprising: a controller, the controller comprising a processor, wherein the controller is configured to execute the method of the aforementioned first aspect to obtain the flow distribution of an air-conditioning water system of the air-conditioning system.

[0018] According to a second aspect of the present application, the air conditioning system further includes: an outdoor unit, N indoor units, a water pump and a detection device. In the air conditioning water system of the air conditioning system, the outdoor unit, the N indoor units and the water pump are connected by water pipes to form a water circuit, the water pump is configured to deliver water to the outdoor unit and the N indoor units, the N indoor units are connected in parallel, and the N indoor units connected in parallel are connected to the outdoor unit. The detection device is configured to detect the water flow and power consumption of the water pump under various working conditions.

[0019] According to a second aspect of the present application, the air-conditioning system further comprises N indoor water valves, which are configured to be opened or closed to control the connection or disconnection of the indoor units corresponding to the indoor water valves in the air-conditioning water system.

[0020] According to the second aspect of the present application, the controller is also configured to: control the opening or closing of the N indoor water valves in the air-conditioning water system and the operating frequency of the water pump so that the air-conditioning water system operates under various operating conditions, and obtain the water flow and power consumption of the water pump under various operating conditions from the detection device.

[0021] According to the second aspect of the present application, the controller is also configured to: obtain the preferred operating condition for the air-conditioning system to operate with minimum total power consumption based on the acquired flow distribution of the air-conditioning water system; and control the air-conditioning system to operate under the preferred operating condition, thereby achieving energy-saving optimization of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are not drawn to scale. In the drawings, each identical or nearly identical component represented in different figures is represented by the same reference numeral. For purposes of clarity, not every component may be labeled in every drawing. In the drawings:

[0023] Figure 1 shows a block diagram of an air conditioning system according to the present application;

[0024] Figure 2 A flowchart of an embodiment of a method for controlling an air conditioning system is shown;

[0025] Figure 3 Shows Figure 2 A detailed flowchart diagram of an embodiment of step 203 in the flowchart diagram;

[0026] Figure 4 Shows Figure 2 A structural block diagram of an embodiment of step 204 in the flowchart of FIG.

[0027] Figure 5 Shown according to Figure 1 A block diagram of the system controller is shown. DETAILED DESCRIPTION

[0028] The specific implementation of the present application will be described below with reference to the drawings of the specification. It should be understood that, where possible, the same or similar reference numerals used in the present application refer to the same components.

[0029] Figure 1 A logic block diagram of the air-conditioning system 100 of the present application is shown, which is used to illustrate the main functional modules of the software and hardware of the air-conditioning system of the present application.

[0030] like Figure 1 As shown, the air conditioning system 100 of the present application includes a system controller 101, an outdoor unit 102, N indoor units 105.1, 105.2 ... 105.N, N indoor unit water valves 104.1, 104.2 ... 104.N, a water pump 106, a flow detection device 107 and a power consumption detection device 108. In the air conditioning water system of the air conditioning system 100, the water pump 106, the outdoor unit 102 and the N indoor units 105.1, 105.2 ... 105.N are connected through a water pipe 109 ( Figure 1The N indoor units 105.1, 105.2 ... 105.N are connected in parallel, and the N indoor units connected in parallel are connected to the outdoor unit 102. The water pump 106 transports water to the outdoor unit 102 and the N indoor units 105.1, 105.2 ... 105.N. The water circuit includes N water branches 117.1, 117.2, ... 117.N, wherein in the water branch 117.1 of the water circuit, the indoor unit water valve 104.1 is connected to the indoor unit 105.1 to control the indoor unit 105.1 to be connected to the air conditioning water system or disconnected from the air conditioning water system; in the water branch 117.2 of the water circuit, the indoor unit water valve 104.2 is connected to the indoor unit 105.2 to control the indoor unit 105.2 to be connected to the air conditioning water system or disconnected from the air conditioning water system; ... In the water branch 117.N of the water circuit, the indoor unit water valve 104.N is connected to the indoor unit 105.N to control the indoor unit 105.N to be connected to the air conditioning water system or disconnected from the air conditioning water system. When the indoor unit water valve is opened, the water branch where it is located is connected to the air conditioning water system, that is, the indoor unit connected to the indoor unit water valve is also connected to the air conditioning water system. When the indoor unit water valve is closed, the water branch where it is located is disconnected from the air conditioning water system, that is, the indoor unit connected to the indoor unit water valve is also disconnected from the air conditioning water system.

[0031] In the water loop of the air conditioning water system, the flow detection device 107 is connected between the water pump 106 and the external unit 102 through the water pipe 109, and is used to detect the water flow output from the water pump 106. The power consumption detection device 108 is connected to the water pump 106 through the connecting line 116, and is used to detect the power consumption of the water pump 106. In one embodiment, the flow detection device 107 is a flow meter. In one embodiment, the power consumption detection device 108 is an electric meter.

[0032] The air conditioning system 100 of the present application can obtain the flow distribution of the air conditioning water system to each indoor unit connected to the air conditioning water system. In addition, the air conditioning system 100 of the present application can also obtain the preferred operating condition under the minimum power consumption of the air conditioning system based on the obtained flow distribution, and the minimum power consumption means that the total power consumption of the air conditioning system is minimized when the required cooling / heat is provided to each air conditioning control unit. Furthermore, the air conditioning system 100 can control its various components to operate under the above-mentioned preferred operating conditions, thereby achieving energy-saving optimization of the air conditioning system. The indoor unit is set in the corresponding air conditioning control unit to provide cooling / heat to the air conditioning control unit.

[0033] When obtaining the flow distribution of the air conditioning water system, the present application performs the following operations through the system controller 101:

[0034] (1) creating an external machine flow function between the pressure drop and the water flow of the external machine 102, and creating an internal machine flow function between the pressure drop and the water flow of the internal machine for each of the N internal machines 105.1, 105.2, ..., 105.N, wherein the external machine flow function includes an external machine coefficient to be determined, and the internal machine flow function includes an internal machine coefficient to be determined;

[0035] (2) operating the air conditioning water system and obtaining operating parameters of the air conditioning water system during operation;

[0036] (3) obtaining an external unit coefficient of the external unit flow function and an internal unit coefficient of the internal unit flow function of each internal unit based on the acquired operating parameters, the external unit flow function and the internal unit flow function of each internal unit, thereby obtaining an external unit flow function with a determined coefficient and an internal unit flow function with a determined coefficient for each internal unit; and

[0037] (4) Based on the external unit flow rate function with the determined coefficient and the internal unit flow rate function with the determined coefficient of each internal unit, the flow rate distribution of the air conditioning water system to the internal units connected to the air conditioning water system is obtained.

[0038] It should be noted that the numbers (1), (2), (3) and (4) of the above steps of the present application do not represent their order. The above steps of the present application can be performed in other appropriate orders, for example, step (2) is performed before step (1), or step (2) and step (1) are performed simultaneously.

[0039] In operation, the system controller 101 can create (eg, via a written program) an outside machine flow function including an outside machine coefficient to be determined and an inside machine flow function including an inside machine coefficient to be determined.

[0040] Furthermore, the system controller 101 can (for example, by a written program) pre-set various working conditions of the air-conditioning system, and send control signals to various components of the air-conditioning system 100 to control the various components to operate under the pre-set working conditions. More specifically, the system controller 101 can (for example, by a written program) send control signals to N indoor water valves 104.1, 104.2...104.N based on the pre-set working conditions to control the opening and closing of these indoor water valves, so that the indoor units corresponding to the indoor water valves are connected or disconnected from the water circuit of the air-conditioning water system. The system controller 101 can also (for example, by a written program) send a control signal of a predetermined operating frequency to the water pump 106 based on the pre-set working conditions to make the water pump 106 operate at the predetermined operating frequency, so as to transport water to the outdoor unit 102 and the connected indoor units through the water pipe 109 and form a water circuit. Based on the above manner, the system controller 101 controls the air-conditioning system 100 to operate under various working conditions. When the air-conditioning system 100 is operating under various pre-set operating conditions, the flow detection device 107 and the power consumption detection device 108 respectively detect (for example, in real time) the water flow and power consumption of the water pump 106 under the corresponding operating conditions, and send the detected water flow and power consumption of the water pump 106 to the system controller 101 through the connecting lines 114 and 115 respectively.

[0041] In other embodiments, the present application obtains (e.g., detects / collects) the water flow and power consumption of the water pump 106 when the user uses the air conditioning system 100 (e.g., operates the air conditioning system 100 to provide the required cooling / heating), performs data cleaning on the water flow and power consumption of the water pump 106 to filter out available data, and then obtains the flow distribution of the air conditioning water system based on the available data. The available data can be equivalent to the water flow and power consumption data of the water pump 106 obtained (e.g., detected / collected) when the air conditioning system is operating under various pre-set working conditions in the aforementioned embodiment. The aforementioned embodiment pre-sets various operating conditions of the air conditioning system and operates the air conditioning system under the various pre-set working conditions to obtain corresponding operating parameters, while in this embodiment, the user normally uses the air conditioning system to operate it under various operating conditions and obtains corresponding operating parameters. The other operations of obtaining the flow distribution of the air conditioning water system (e.g., the above steps (1), (3) and (4)) are the same.

[0042] like Figure 1As shown, the system controller 101 sends a control signal to the main board 103 of the external unit through the connecting line 110, and then the main board 103 sends the received control signal to the internal unit 105.1, 105.2...105.N through the connecting line 111 and the sub-connecting lines 111.1, 111.2...111.N, respectively. Finally, the internal unit 105.1, 105.2...105.N sends the received control signal to the internal unit water valve 104.1, 104.2...104.N through the connecting lines 112.1, 112.2...112.N, respectively, to control the opening and closing of the internal unit water valve. It should be understood by those skilled in the art that the control signal can be sent from the system controller 101 to the internal unit water valve 104.1, 104.2...104.N to control the opening and closing of the internal unit water valve through other suitable implementations. For example, the system controller 101 directly sends the control signal to the indoor water valves 104.1, 104.2 ... 104.N without passing through the outdoor unit 102 and the indoor units 105.1, 105.2 ... 105.N; or, the system controller 101 can send the control signal to the indoor water valves 104.1, 104.2 ... 104.N only through the indoor units 105.1, 105.2 ... 105.N. The main board 103 also sends the received control signal to the water pump 106 through the connection line 113 to control the water pump 106 to operate at a predetermined operating frequency.

[0043] Further, the system controller 101 is able to (for example, through a written program) obtain (for example, calculate) the pressure drop of the water pump 106 under various operating conditions based on the water flow rate and power consumption of the water pump 106 under various operating conditions obtained as above, and obtain (for example, create) the correlation equations between the water flow rates of the external unit 102, the N internal units 105.1, 105.2...105.N and the water pump 106 under various operating conditions, as well as the correlation equations between the external unit 102, the N internal units 105.1, 105.2...105.N and the pressure drops of the water pump 106. The system controller 101 can also (for example, by a written program) acquire (for example, calculate) an external unit coefficient of the external unit flow function and an internal unit coefficient of the internal unit flow function of each internal unit based on the acquired water flow and pressure drop of the water pump 106 under various operating conditions, the correlation equations between the water flow of the external unit 102, the N internal units 105.1, 105.2 ... 105.N and the water pump 106 under various operating conditions, and the correlation equations between the external unit 102, the N internal units 105.1, 105.2 ... 105.N and the pressure drop of the water pump 106, and the created external unit flow function and the internal unit flow function of each internal unit. Therefore, the system controller 101 can acquire an external unit flow function with a determined coefficient and an internal unit flow function with a determined coefficient for each internal unit.

[0044] The system controller 101 can also obtain the flow distribution of the air conditioning water system to the indoor units connected to the air conditioning water system based on the outdoor unit flow function with determined coefficients and the indoor unit flow function with determined coefficients of each indoor unit (for example, through a written program).

[0045] In addition, when implementing the energy-saving optimization of the air-conditioning system 100, the system controller 101 can (for example, through a written program) obtain the priority operating condition when the total power consumption of the air-conditioning system 100 is the minimum based on the obtained flow distribution of the air-conditioning water system to the indoor units connected to the air-conditioning water system and the obtained cooling / heat required to be provided to each air-conditioning control unit. The system controller 101 can also (for example, through a written program) control the various components of the air-conditioning system 100 to operate under the obtained priority operating condition to achieve energy-saving optimization of the air-conditioning system 100.

[0046] Figure 2 FIG. 2 is a flow chart of an embodiment of a method 200 for controlling an air conditioning system. Figure 2 As shown, at step 201 , the method 200 for controlling the air conditioning system starts to be executed, and then goes from step 201 to step 202 .

[0047] At step 202, an external machine flow function including the external machine coefficient to be determined is created, and an internal machine flow function including the internal machine coefficient to be determined is created for each of the N internal machines 105.1, 105.2, ... 105.N. The external machine flow function is the pressure drop Δp of the external machine 102 out and water flow Q out Function between, for example, Δp out =a out *Q out 2 +b out , where a out , b out The outdoor unit coefficient is the outdoor unit flow function. The indoor unit flow function is the function between the pressure drop of the indoor unit and the water flow. For example, the indoor unit flow functions of N indoor units 105.1, 105.2...105.N are: Δp1 = a1*Q1 2 +b1,Δp2=a2*Q2 2 +b2,......,Δp n =a n *Q n 2 +b n , where Δp1, Δp2...Δp n The pressure drops of the indoor units 105.1, 105.2, ..., 105.N, Q1, Q2, ..., Q nThe water flow rates of the indoor units 105.1, 105.2, ..., 105.N are (a1, b1), (a2, b2), ..., (a n , b n ) are respectively the indoor coefficients of the indoor flow functions of the indoor units 105.1, 105.2 ... 105.N. Then, the process goes to step 203 from step 202.

[0048] In step 203, the air conditioning water system is operated and the operating parameters of the air conditioning water system are obtained. Specifically, the air conditioning water system is operated under various working conditions, and the water flow rate Q of the water pump 106 is obtained when the air conditioning water system is operated under various working conditions. pump Power pump Each working condition is composed of multiple parameters, including the combination configuration of the working state of the indoor unit and the operating frequency of the water pump, wherein the combination configuration of the working state of the indoor unit is a combination formed by connecting or disconnecting each indoor unit among the N indoor units with the air conditioning water system. The combination configuration of the working state of the indoor unit includes several predetermined combination configurations, and the operating frequency of the water pump includes several predetermined operating frequencies. Figure 3 A specific implementation of step 203 is shown. Then, the process proceeds from step 203 to step 204.

[0049] At step 204, based on the acquired operating parameters, the outdoor unit flow function and the indoor unit flow function of each indoor unit, the outdoor unit coefficient of the outdoor unit flow function and the indoor unit coefficient of the indoor unit flow function of each indoor unit are acquired, thereby obtaining the outdoor unit flow function with a determined coefficient and the indoor unit flow function with a determined coefficient of each indoor unit. Specifically, based on the acquired water flow Q of the water pump 106 under various operating conditions pump Power pump To obtain the pressure drop Δp of the water pump 106 pump , and obtain the correlation equations between the water flow rates of the water pump 106, the external unit 102 and the internal units connected to the air conditioning water system (i.e., the various components of the air conditioning water system) under various working conditions, and the correlation equations between the water pump 106, the external unit 102 and the pressure drops of the internal units connected to the air conditioning water system. The water flow rates Q of the water pump 106 under various working conditions are obtained. pump and pressure drop Δp pump , the external machine flow function Δp created above out =a out *Q out 2 +b out And the internal machine flow function of each internal machine Δp1=a1*Q1 2 +b1,Δp2=a2*Q2 2 +b2,......,Δp n =an *Q n 2 +b n , and the correlation equations between the water flow of each component under the above working conditions and the correlation equations between the pressure drops are combined to obtain the external machine coefficient a out , b out And internal machine coefficients a1, b1, a2, b2......a n , b n And the water flow Q of the water pump 106 under various working conditions pump and pressure drop Δp pump Then, based on the calculation matrix, the external machine coefficient a is obtained. out , b out And internal machine coefficients a1, b1, a2, b2......a n , b n , thus obtaining the external unit flow function with determined coefficients and the internal unit flow function with determined coefficients for each internal unit. Figure 4 A specific implementation of step 204 is shown. Then, the process proceeds from step 204 to step 205.

[0050] At step 205, based on the external unit flow function with the determined coefficient and the internal unit flow function with the determined coefficient of each internal unit, the flow distribution of the air conditioning water system to the internal units connected to the air conditioning water system is obtained. Specifically, the correlation equation between the pressure drops of the internal units connected to the air conditioning water system is obtained, for example, the pressure drops of each of the internal units connected to the air conditioning water system are equal. And, based on the external unit flow function Δp with the determined coefficient out =a out *Q out 2 +b out and the internal machine flow function of the determined coefficient of the internal machine connected to the air conditioning water system (for example, the internal machines 105.1, 105.2...105.i are connected to the air conditioning water system, then the internal machine flow function of the determined coefficient of these internal machines is Δp1=a1*Q1 2 +b1,Δp2=a2*Q2 2 +b2,......,Δp i =a i *Q i 2 +b i ) to determine the flow distribution of the air conditioning water system to the indoor units connected to the air conditioning water system (for example, a1*Q1 2 +b1=a2*Q2 2 +b2=......=a i *Q i 2 +bi Then, the process goes from step 205 to step 206, and the execution of the method 200 for controlling the air conditioning system ends.

[0051] Figure 3 Shows Figure 2 A detailed flowchart of an embodiment of step 203 in the flowchart of FIG. Figure 2 As shown, at step 203, the air conditioning water system is operated under various working conditions, and the water flow and power consumption of the water pump when the air conditioning water system is operated under various working conditions are obtained.

[0052] like Figure 3 As shown by Figure 2 Step 202 Go to Figure 3 Step 301. At step 301, a predetermined combination configuration C of the indoor unit working state is i (where i=1, 2, ..., n) connect or disconnect the indoor unit corresponding to the combination configuration with the air conditioning water system, and then proceed from step 301 to step 302.

[0053] At step 302, the water pump 106 is operated at a predetermined operating frequency f j (where j = 1, 2, ..., n), that is, the air conditioning water system operates in a predetermined combination configuration C of the indoor unit working state. i and a predetermined operating frequency f j The number of the predetermined combination configurations and the number of the predetermined operating frequencies may be the same or different. Then, the process proceeds from step 302 to step 303.

[0054] At step 303, the current operating condition (C i , f j ) Water flow Q of water pump 106 pump Power pump , then go to step 304 from step 303. The water pump 106 of the present application is a variable frequency water pump, which has four parameters, namely, operating frequency, water flow, power consumption and pressure drop (or "pressure head"). When two of the four parameters are determined, the other two of the four parameters are also determined. For example, the variable frequency water pump is at an operating frequency f i When running at Power consumption and pressure drop The three parameters have the following corresponding relationship: Among them, η is the pump efficiency, that is, the ratio of the effective power of the pump to the shaft power, and ρ is the density of the medium transported by the pump. Therefore, the water flow rate of the pump can be calculated based on the following formula and power consumption Calculate the pressure drop of the pump

[0055] At step 304, it is determined that in the above-mentioned predetermined combination configuration C i If the result of the judgment is "No", the process goes to step 302 to make the water pump 106 run at another predetermined operating frequency f. j+1 If one of the above predefined combinations is configured C i If all the predetermined operating frequencies are completed (ie, the judgment result is "yes"), go to step 305.

[0056] At step 305, it is determined whether all operating conditions have been completed. If the determination result is "no", the process goes to step 301 and another predetermined combination configuration C is configured. i+1 The indoor unit corresponding to the combination configuration is connected or disconnected with the air conditioning water system. If all operating conditions are completed (i.e., the judgment result is "yes"), go to Figure 4 Step 401 (see Figure 4 ).

[0057] The present application connects or disconnects the indoor unit corresponding to the combination configuration with the air conditioning water system under a predetermined combination configuration, and then operates the water pump 106 one by one at several predetermined operating frequencies to complete the operation of the air conditioning water system under a set of working conditions, and obtains the required operating parameters under these working conditions. Then, under another predetermined combination configuration, the indoor unit corresponding to the combination configuration is connected or disconnected with the air conditioning water system, and the water pump 106 operates one by one at several predetermined operating frequencies to complete the operation of the air conditioning water system under another set of working conditions, and obtains the required operating parameters under these working conditions. This cycle is repeated until all working conditions are completed and the required operating parameters under all working conditions are obtained.

[0058] Figure 4 Shows Figure 2 A structural block diagram of an embodiment of step 204 in the flowchart of FIG. Figure 2 As shown, at step 204, the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit are obtained based on the acquired operating parameters, the external unit flow function and the internal unit flow function of each internal unit, thereby obtaining an external unit flow function with a determined coefficient and an internal unit flow function with a determined coefficient for each internal unit.

[0059] like Figure 4 As shown by Figure 3 Step 203 Go to Figure 4 Step 204 is specifically performed by Figure 3Sub-step 305 in step 203 (i.e., the operation of completing all operating conditions and obtaining the required operating parameters under all operating conditions) is turned to Figure 4 Sub-step 401 in step 204.

[0060] At step 401, the following formula is used based on the various working conditions (C i , f j ) Water flow Q of water pump 106 pump Power pump Obtain the pressure drop Δp of the water pump 106 under the corresponding working conditions pump =f(Q pump ,Power pump ). Then, the process goes from step 401 to step 402.

[0061] At step 402, a first equation between the water flow of the water pump 106, the external unit 102 and the internal unit connected to the air conditioning water system and a second equation between the pressure drop of the water pump 106, the external unit 102 and the internal unit connected to the air conditioning water system under various working conditions are obtained. The first equation is Q pump =Q out =sum(Q i ), where Q pump is the water flow of the water pump 106 under the corresponding working conditions, Q out is the water flow of the external unit 102 under the corresponding working conditions, sum(Q i ) is the sum of the water flow rates of the indoor units connected to the air conditioning water system under the corresponding working conditions, for example, i = 1, 2, ..., n. The second equation is Δp pump =Δp total =Δp out +Δp i , where Δp pump is the pressure drop of the water pump 106 under the corresponding working conditions, Δp total is the total pressure drop of the air conditioning water system under the corresponding working conditions, Δp out is the pressure drop of the external unit 102 under the corresponding working conditions, Δp i is the pressure drop of any one of the indoor units connected to the air conditioning water system under the corresponding working condition, for example, i=1, 2, ..., n. Then, the process goes to step 403 from step 402.

[0062] At step 403, the water flow rate Q of the water pump 106 is obtained. pump and pressure drop Δp pump , the created external machine flow function Δp out =a out *Q out 2 +b outAnd the internal machine flow function of each internal machine Δp1=a1*Q1 2 +b1,Δp2=a2*Q2 2 +b2,......,Δp n =a n *Q n 2 +b n , the first equation Q pump =Q out =sum(Q i ) and the second equation Δp pump =Δp total =Δp out +Δp i Combined to obtain the external machine coefficient a to be determined out , b out And internal machine coefficients a1, b1, a2, b2......a n , b n And the water flow Q of the water pump 106 under various working conditions pump and pressure drop Δp pump Then, the process goes from step 403 to step 404.

[0063] At step 404, the coefficients of the external unit and the coefficients of the internal unit are obtained based on the above matrix, thereby obtaining the external unit flow function with the determined coefficients and the internal unit flow function with the determined coefficients of each internal unit. Then, step 404 is turned to Figure 2 In step 205, the flow distribution of the air-conditioning water system to the indoor units connected to the air-conditioning water system is obtained.

[0064] In the operation of the present application, under a predetermined combination configuration of the indoor unit working state, the indoor unit water valve 104.1 is opened and the other indoor unit water valves are closed so that the indoor unit 105.1 is connected to the air conditioning water system and the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at a predetermined operating frequency f1, that is, the air conditioning water system is operated under the first working condition. Under the first working condition, the water flow rate of the water pump 106 is Water flow Q of the external unit 102 out 1 and the water flow Q1 of the indoor unit 105.1 connected to the air conditioning water system 1 The same, that is Furthermore, in the first working condition, the pressure drop of the water pump 106 is is the total pressure drop of the air conditioning water system The total pressure drop is the pressure drop Δp of the external unit 102 out 1 and the pressure drop Δp1 of the indoor unit 105.1 connected to the air conditioning water system 1 The sum of the pressure drop of the water pump 106 The water flow rate of the water pump 106 can be and power consumption Get, that is Therefore, the following formula can be obtained under the first working condition:

[0065]

[0066] Furthermore, the water flow rate Q of the external unit 102 under the first working condition is created. out 1 and pressure drop Δp out 1 The external machine flow function between where a out , b out The water flow Q1 of the indoor unit 105.1 connected to the air conditioning water system under the first working condition is created. 1 and pressure drop Δp1 1 The internal machine flow function between Where a1 and b1 are the internal machine coefficients of the internal machine flow function of the internal machine 105.1. Therefore, the external machine flow function and the internal machine flow function under the first working condition created are substituted into the above formula (I), and the following is obtained:

[0067]

[0068] Since in this first working condition Therefore, the above formula (II) can be rewritten as:

[0069]

[0070] Keep the indoor unit water valve 104.1 open and the other indoor unit water valves closed so that the indoor unit 105.1 is connected to the air conditioning water system and the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at several predetermined operating frequencies f1, f2, ..., f n By running them one by one, we can obtain the following calculation matrices under these conditions:

[0071]

[0072] in, The water pump 106 is operated at a predetermined operating frequency f by opening the indoor water valve 104.1 and closing the other indoor water valves. n The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition.

[0073] The indoor unit water valve 104.i (i=1, 2, ..., n) is opened while the other indoor unit water valves are closed so that the indoor unit 105.i is connected to the air conditioning water system while the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at several predetermined operating frequencies f1, f2, ..., f n By running them one by one, we can obtain the following calculation matrices under these conditions:

[0074]

[0075] in, is the water flow rate of the water pump 106 under the operating condition consisting of opening the indoor water valve 104.i and closing the other indoor water valves and operating the water pump 106 at a predetermined operating frequency f1, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition. The water pump 106 is operated at a predetermined operating frequency f by opening the indoor water valve 104.i and closing the other indoor water valves. n The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition.

[0076] The indoor water valves 104.1 and 104.2 (i.e., two indoor water valves) are opened while the other indoor water valves are closed so that the indoor units 105.1 and 105.2 are connected to the air conditioning water system while the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at a predetermined operating frequency f1. Under this operating condition, the water flow rate of the water pump 106 is Water flow Q of the external unit 102 out (1，2) 、Water flow Q1 of indoor unit 105.1 (1，2) And the water flow Q2 of the indoor unit 105.2 (1，2) The first correlation equation between is: Furthermore, under this condition, the pressure drop of the water pump 106 is Pressure drop Δp of the external unit 102 out (1，2) , pressure drop Δp1 of indoor unit 105.1 (1，2) And the pressure drop of the indoor unit 105.2 Δp2 (1，2) The second correlation equation between is: in, is the power consumption of the water pump 106 under the above working conditions.

[0077] And, under this condition, the water flow Q1 of the indoor unit 105.1 is created (1，2)and pressure drop Δp1 (1，2) The internal machine flow function between The water flow Q2 of the indoor unit 105.2 created (1，2) and pressure drop Δp2 (1，2) The internal machine flow function between The water flow rate Q of the external unit 102 created out (1，2) and pressure drop Δp out (1，2) The external machine flow function between Therefore, the above first correlation equation and the second correlation equation, the created indoor flow function and outdoor flow function are combined to obtain the following formula:

[0078]

[0079]

[0080] The indoor water valves 104.1 and 104.2 are opened while the other indoor water valves are closed so that the indoor units 105.1 and 105.2 are connected to the air conditioning water system while the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at several predetermined operating frequencies f1, ..., f m ,......,f n Run them one by one under these conditions and construct the following calculation matrix (VII):

[0081]

[0082] in, The water pump 106 is operated at a predetermined operating frequency f by opening the indoor water valves 104.1 and 104.2 and closing the other indoor water valves. m The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition. The water pump 106 is operated at a predetermined operating frequency f by opening the indoor water valves 104.1 and 104.2 and closing the other indoor water valves. n The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition.

[0083] The indoor water valves 104.i and 104.j (i.e., any two indoor water valves among the N indoor water valves) are opened while the other indoor water valves are closed so that the indoor units 105.i and 105.j are connected to the air conditioning water system while the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at a plurality of predetermined operating frequencies f1, ..., f m ,......,f n Run them one by one under these conditions and construct the following calculation matrix (VIII):

[0084]

[0085] in, is the water flow rate of the water pump 106 under the operating condition consisting of opening the indoor water valves 104.i and 104.j and closing the other indoor water valves, and operating the water pump 106 at a predetermined operating frequency f1, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition. The water pump 106 is operated at a predetermined operating frequency f by opening the indoor water valves 104.i and 104.j and closing the other indoor water valves. m The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition. The water pump 106 is operated at a predetermined operating frequency f by opening the indoor water valves 104.i and 104.j and closing the other indoor water valves. n The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition.

[0086] The preset combination configuration C in the indoor unit working state i Under the condition, several indoor water valves (for example, 104.1, ..., 104.m) are opened and other indoor water valves are closed so that the corresponding several indoor units (for example, 105.1, ..., 105.m) are connected to the air conditioning water system and other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at several predetermined operating frequencies f1, ..., f m ,......,f n Run them one by one under these conditions and construct the following calculation matrix (IX):

[0087]

[0088] in, The predetermined combination configuration C of the water pump 106 in the working state of the indoor unit i (for example, the water flow rate under the working condition consisting of the indoor water valves 104.1, ..., 104.m being opened and the other indoor water valves being closed) and the water pump 106 operating at a predetermined operating frequency f1, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition. The water pump 106 is configured in the above predetermined combination C i and the water pump 106 operates at a predetermined frequency f m The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition. The water pump 106 is configured in the above predetermined combination C i and the water pump 106 operates at a predetermined frequency f n The water flow rate under the operating conditions of the following components, is the power consumption of the water pump 106 under this working condition, is the pressure drop of the water pump 106 under this working condition.

[0089] In the present application, any one of the N indoor water valves is opened while the other indoor water valves are closed so that the corresponding indoor unit is connected to the air conditioning water system while the other indoor units are disconnected from the air conditioning water system, and the water pump 106 is operated at several predetermined operating frequencies f1, ..., f m ,......,f n Run them one by one under these working conditions, obtain the water flow and power consumption of the water pump under these working conditions, and build a calculation matrix under these working conditions. Open any two, any three, ... N water valves of the N indoor units and close the other water valves of the indoor units so that the corresponding two indoor units are connected to the air conditioning water system and the other indoor units are disconnected from the air conditioning water system, and make the water pump 106 operate at several predetermined operating frequencies f1, ..., f m ,......,f n The calculation matrix constructed under the above working conditions includes the water flow, power consumption and pressure drop of the water pump under the corresponding working conditions, as well as the external machine coefficient and the internal machine coefficient. Through these calculation matrices and the obtained water flow, power consumption and pressure drop of the water pump under the corresponding working conditions, the external machine coefficient a of the external machine flow function can be obtained. out , b out and the internal machine coefficients a1, b1, ..., a of the internal machine flow function of each internal machine m , b m,......,a n , b n .

[0090] In some embodiments, the air conditioning water system can be operated under some of the operating conditions listed above, and the operating parameters under the corresponding operating conditions can be obtained and the corresponding calculation matrix can be constructed to obtain the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit.

[0091] Figure 5 Shown according to Figure 1 The block diagram of the system controller 101 is shown in FIG. Figure 5 As shown, the system controller 101 includes a bus 501, a processor 502, a memory 503, an input interface 504, and an output interface 505. The processor 502, the memory 503, the input interface 504, and the output interface 505 are connected to the bus 501. The processor 502 can read a program (or instruction) from the memory 503 and execute the program (or instruction) to perform data processing and control functions of various components of the air conditioning system; the processor 502 can also write data or programs (or instructions) into the memory 503. The memory 503 can store programs (instructions) or data. By executing the instructions in the memory 503, the processor 502 can control the memory 503, the input interface 504, and the output interface 505.

[0092] The output interface 505 is configured to receive a control signal from the processor 502, convert the control signal into an output signal suitable for the main board 103 of the external unit 102, and send the output signal to the main board 103 through the connecting line 110. For example, the output signal is an opening and closing signal of each internal machine water valve to control the opening and closing of each internal machine water valve 104.1, 104.2...104.N, so as to control the corresponding internal machine to be connected or disconnected with the air conditioning water system. The output signal can also be an operating frequency signal of the water pump to control the water pump 106 to operate at a predetermined operating frequency. The output signal is a control signal of each preset working condition, which is used to control the various components of the air conditioning system to operate under the corresponding working conditions.

[0093] The input interface 504 is configured to receive the water flow of the water pump under the corresponding working condition from the flow detection device 107 through the connection line 114, and receive the power consumption of the water pump under the corresponding working condition from the power consumption detection device 108 through the connection line 115. The input interface 504 is also configured to convert the water flow and power consumption of the water pump into a signal recognizable by the processor 502, and output the signal to the processor 502. The processor 502 is configured to receive the water flow and power consumption of the water pump under various working conditions from the input interface 504, construct (for example, by executing a program (or instruction)) a calculation matrix under various working conditions, and perform processing (for example, calculation) based on the water flow and power consumption of the water pump under various working conditions and the calculation matrix to obtain the external machine coefficient of the external machine flow function and the internal machine coefficient of the internal machine flow function of each internal machine.

[0094] When implementing the energy-saving optimization of the air-conditioning system 100, the processor 502 is configured to receive a program (or instruction) from the memory 503, and execute the program (or instruction) to obtain (for example, optimize the calculation) the preferred working condition when the total power consumption of the air-conditioning system 100 is the smallest based on the flow distribution of the air-conditioning water system to the indoor unit connected to the air-conditioning water system and the refrigeration / heat required to be provided for each air-conditioning control unit. The processor 502 is also configured to output a control signal to the output interface 505 based on the preferred working condition. The output interface 505 is configured to receive the control signal from the processor 502, convert the control signal into an output signal suitable for the main board 103 of the outdoor unit 102, and send the output signal to the main board 103 through the connecting line 110. The output signal is a control signal of each component of the air-conditioning system 100, which is used to control the air-conditioning system 100 to operate under the above-mentioned preferred working condition to achieve energy-saving optimization of the air-conditioning system 100.

[0095] The present application obtains the water flow and power consumption of the water pump under various working conditions through a detection device, and controls the operation of the air-conditioning system through a system controller and constructs a matrix including an external unit coefficient of an external unit flow function and an internal unit coefficient of an internal unit flow function of each internal unit, as well as the water flow, power consumption and pressure drop of the water pump based on various working conditions, so as to obtain the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit, and then determine the flow distribution of the air-conditioning water system to the internal unit connected to the air-conditioning water system. The data required for detection (or collection) in the present application are the water flow and power consumption of the water pump under various working conditions, and other operations are performed by the system controller (for example, executing the written program (or instruction)), without the need to obtain detailed information of the pipes, valves and other components of the water system as in traditional calculations, such as friction coefficient, local resistance coefficient and drop, etc. Therefore, the method and device for obtaining the flow distribution of the air-conditioning water system of the present application can be easily implemented and can accurately obtain the flow distribution of the air-conditioning water system. Moreover, since there is no need to obtain specific information about the various components of the air-conditioning water system, such as the friction coefficient, local resistance coefficient, and drop, the method and device for obtaining the flow distribution of the air-conditioning water system of the present application can be applied to obtaining the flow distribution of any unknown air-conditioning water system.

[0096] Although the present application has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, changes, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent to those skilled in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosure in this specification may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present application as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present application. Therefore, the present application is intended to include all known or earlier developed alternatives, modifications, changes, improvements and / or substantially equivalent solutions.

Claims

1. A method for obtaining flow distribution of an air conditioning water system, wherein the air conditioning water system comprises an outdoor unit and N indoor units, It is characterized in that The method comprises: (1) creating an external machine flow function between the pressure drop of the external machine and the water flow rate, and creating an internal machine flow function between the pressure drop of the internal machine and the water flow rate for each of the N internal machines, wherein the external machine flow function includes an external machine coefficient to be determined, and the internal machine flow function includes an internal machine coefficient to be determined; (2) operating the air-conditioning water system and obtaining operating parameters of the air-conditioning water system during operation; (3) obtaining an external unit coefficient of the external unit flow function and an internal unit coefficient of the internal unit flow function of each internal unit based on the acquired operating parameters, the external unit flow function and the internal unit flow function of each internal unit, thereby obtaining an external unit flow function with a determined coefficient and an internal unit flow function with a determined coefficient for each internal unit; and (4) obtaining flow distribution of the air-conditioning water system to the indoor units connected to the air-conditioning water system based on the outdoor unit flow function with the determined coefficient and the indoor unit flow function with the determined coefficient of each indoor unit, Wherein, in the step (3), the water flow rate and pressure drop of the water pump when the air-conditioning water system is in operation are obtained based on the operating parameters of the air-conditioning water system obtained during operation, and the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit are obtained based on the water flow rate and pressure drop of the water pump, the correlation between the water flow rate of the external unit, the N internal units and the water pump when the air-conditioning water system is in operation, and the correlation between the pressure drop of the external unit, the N internal units and the water pump, the external unit flow function and the internal unit flow function of each internal unit.

2. The method for obtaining flow distribution of an air conditioning water system according to claim 1, It is characterized in that In the step (2), obtaining the operating parameters of the air conditioning water system during operation includes: obtaining the water flow and power consumption of a water pump during operation of the air conditioning water system, wherein the water pump is configured to deliver water to the outdoor unit and the N indoor units.

3. The method for obtaining flow distribution of an air conditioning water system according to claim 2, It is characterized in that In the step (2), operating the air conditioning water system includes operating the air conditioning water system under a plurality of operating conditions, each of the plurality of operating conditions being composed of a plurality of parameters, and the plurality of parameters comprising: Combination configuration of indoor unit working status; and The operating frequency of the water pump, The combination configuration of the indoor unit working states is a combination formed by connecting or disconnecting each of the N indoor units with the air conditioning water system.

4. The method for obtaining flow distribution of an air conditioning water system according to claim 3, It is characterized in that The combination configuration of the indoor unit working state includes several predetermined combination configurations, and the operating frequency of the water pump includes several predetermined operating frequencies.

5. The method for obtaining flow distribution of an air conditioning water system according to claim 4, It is characterized in that In step (2), operating the air-conditioning water system includes operating the air-conditioning water system under the plurality of operating conditions, wherein operating the air-conditioning water system under one of the plurality of operating conditions includes the following steps: Connecting or disconnecting each indoor unit to or from the air conditioning water system in a predetermined combination configuration among the plurality of predetermined combination configurations; and The water pumps are operated one by one at the plurality of predetermined operating frequencies.

6. The method for obtaining flow distribution of an air conditioning water system according to claim 2, It is characterized in that When obtaining the external unit coefficient of the external unit flow function and the internal unit coefficient of the internal unit flow function of each internal unit in the step (3), the following steps are performed: (3-1) obtaining a pressure drop of the water pump based on the water flow rate and power consumption of the water pump when the air conditioning water system is in operation, and obtaining a correlation between the water flow rates of the outdoor unit, the N indoor units, and the water pump, and a correlation between the pressure drops of the outdoor unit, the N indoor units, and the water pump when the air conditioning water system is in operation; as well as (3-2) Based on the water flow rate and pressure drop of the water pump obtained when the air-conditioning water system is in operation, the correlation between the water flow rates of the outdoor unit, the N indoor units and the water pump, and the correlation between the pressure drops of the outdoor unit, the N indoor units and the water pump when the air-conditioning water system is in operation, and the outdoor unit flow function and the indoor unit flow function of each indoor unit, the outdoor unit coefficient of the outdoor unit flow function and the indoor unit coefficient of the indoor unit flow function of each indoor unit are obtained.

7. The method for obtaining flow distribution of an air conditioning water system according to claim 2, It is characterized in that The water pump comprises a variable frequency water pump having four parameters, namely, operating frequency, water flow, power consumption and pressure drop. When two of the four parameters are determined, the other two of the four parameters are also determined accordingly.

8. The method for obtaining flow distribution of an air conditioning water system according to claim 1, It is characterized in that In the step (1): The external machine flow function created is Δp out =a out *Q out 2 +b out , where Δp out is the pressure drop of the external unit, Q out is the water flow rate of the external unit, a out , b out The external machine coefficient is the external machine flow function; and The internal machine flow function of each internal machine created is Δp i =a i *Q i 2 +b i , i = 1, 2, ..., n, where i is the serial number of the indoor unit, Δp i is the pressure drop of the internal unit i, Q i is the water flow rate of indoor unit i, a i , b i is the internal machine coefficient of the internal machine flow function of internal machine i.

9. The method for obtaining flow distribution of an air conditioning water system according to claim 1, Features: The obtained flow distribution of the air-conditioning water system to the indoor units connected to the air-conditioning water system can be used for energy-saving optimization of the air-conditioning system.

10. An air conditioning system, It is characterized in that The air conditioning system comprises: a controller, the controller comprising a processor, The controller is configured to execute the method according to any one of claims 1 to 9 to obtain flow distribution of the air-conditioning water system of the air-conditioning system.

11. The air conditioning system according to claim 10, It is characterized in that The air conditioning system further comprises: Outdoor unit; N indoor units; Water pump, In the air conditioning water system of the air conditioning system, the outdoor unit, the N indoor units and the water pump are connected by a water pipe to form a water circuit, the water pump is configured to deliver water to the outdoor unit and the N indoor units, the N indoor units are connected in parallel, and the N indoor units connected in parallel are connected to the outdoor unit; and A detection device is configured to detect the water flow and power consumption of the water pump under various working conditions.

12. The air conditioning system according to claim 11, It is characterized in that The air conditioning system further comprises: N indoor water valves are configured to be opened or closed to control the connection or disconnection of the indoor units corresponding to the indoor water valves in the air-conditioning water system.

13. The air conditioning system according to claim 12, It is characterized in that The controller is also configured to: Control the opening or closing of the N internal water valves in the air-conditioning water system and the operating frequency of the water pump to make the air-conditioning water system operate under various working conditions, and obtain the water flow and power consumption of the water pump under various working conditions from the detection device.

14. The air conditioning system according to claim 12, It is characterized in that The controller is also configured to: Acquire a working condition in which the air conditioning system operates with minimum total power consumption based on the acquired flow distribution of the air conditioning water system; as well as The air conditioning system is controlled to operate under the acquired working conditions, thereby achieving energy-saving optimization of the air conditioning system.

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