Operating condition control method, device, equipment, medium and integrated control cabinet

Abstract

The present application discloses an operating condition control method, device, electronic device, readable storage medium and strong and weak integrated control cabinet, which are applied to the field of energy conservation and environmental protection technology. The method is applicable to the controller of a central air conditioner with a strong and weak integrated control cabinet, including: pre-fitting the ideal correspondence between the target control parameters and the load rate under the highest system energy efficiency conditions in different load rates based on the historical operating data and physical parameters of the target equipment of the central air conditioner to be controlled; determining the current load rate of the central air conditioner to be controlled based on the real-time cooling capacity data of the central air conditioner to be controlled; determining the target control parameter value according to the ideal correspondence and the current load rate; automatically resetting the corresponding control target value based on the target control parameter value, so as to automatically adjust the operating condition of the corresponding equipment based on the control target value. The present application can effectively improve the control efficiency of the operating condition of the target equipment of the centralized refrigeration room of the water-cooled central air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of energy conservation and environmental protection, and in particular to an operating condition control method, device, electronic equipment, readable storage medium and a strong and weak integrated control cabinet. Background Art

[0002] The main equipment in the centralized refrigeration room of water-cooled central air conditioners includes water-cooled chillers, cooling water pumps, refrigeration water pumps and cooling towers. These main equipment need to adjust the number of equipment in operation and operating conditions according to the changing demand of the cooling load in the building to match the changing cooling load and achieve on-demand regulation. The traditional automatic control cabinets of these main equipment usually use the power supply and switch of the strong power line in the strong power cabinet, and the weak power cabinet is equipped with automatic control facilities such as inverters and controllers to adjust the number of equipment in operation and operating conditions.

[0003] Considering that there is a certain distance between the strong current cabinet and the weak current cabinet, the cables connecting the strong current cabinet and the weak current cabinet are relatively long. This method will not only increase the workload of the staff, but also occupy a large area. In order to solve the disadvantages caused by the separate installation of the strong current cabinet and the weak current cabinet, the relevant technology adopts a strong and weak current integrated cabinet, that is, the strong current facilities and the weak current facilities are deployed in the same cabinet, and the middle is divided into a strong current room and a weak current room by a partition. The strong and weak current integrated cabinet is used to control the operating conditions of the main equipment in the centralized refrigeration room. The strong and weak current integrated cabinet can only control a single type of equipment separately. For example, a strong and weak current integrated cabinet that controls the cooling water pump separately, and a strong and weak current integrated cabinet that controls the cooling tower separately. However, since the chillers, water pumps, cooling towers and other equipment in the machine room are connected through a water loop, the operating condition adjustment of one device will affect the adjustment efficiency of other equipment, and the equipment affects each other. Adjusting each device separately cannot meet the user's efficient adjustment needs.

[0004] In view of this, how to improve the efficiency of regulating the operating conditions of target equipment in a centralized refrigeration room of a water-cooled central air-conditioner is a technical problem that people in the field need to solve. Summary of the invention

[0005] The present application provides an operating condition control method, device, electronic device, readable storage medium and a strong and weak integrated control cabinet, which can effectively improve the control efficiency of the operating condition of the target equipment in the centralized refrigeration room of the water-cooled central air-conditioning.

[0006] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0007] An embodiment of the present invention provides an operating condition control method, which is applied to a controller of a central air conditioner having a strong and weak integrated control cabinet, comprising:

[0008] Based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled, the ideal corresponding relationship between each target control parameter and the load rate under the condition of the highest system energy efficiency in different load rates is fitted in advance;

[0009] Determining the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated;

[0010] Determining each target control parameter value according to the ideal corresponding relationship and the current load rate;

[0011] Automatically resetting the corresponding control target value based on each target control parameter value to automatically adjust the operating condition of the corresponding target device based on the control target value;

[0012] Among them, the strong and weak integrated control cabinet includes a strong current installation room and a weak current installation room placed in the cabinet and divided by a first shielding plate and a second shielding plate; the electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; the first shielding plate includes a first signal terminal block for collecting inverter signals, and the second shielding plate includes a second signal terminal block for collecting monitoring signals of the controller. The first signal terminal block is connected to the line of the second signal terminal block and the connecting line is located in the cabinet.

[0013] Optionally, determining the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated includes:

[0014] Obtain the real-time cooling capacity data monitored by the cooling capacity meter of the chilled water main in the refrigeration room;

[0015] Obtain the system rated cooling capacity under current actual working conditions;

[0016] The load rate of the current working condition is calculated based on the real-time cooling capacity data and the rated cooling capacity of the system to serve as the current load rate of the central air conditioner to be regulated.

[0017] Optionally, the front door panel of the cabinet of the integrated strong and weak control cabinet further includes a human-computer interaction module, and before determining the target control parameter value according to the ideal corresponding relationship and the current load rate, it also includes:

[0018] When receiving the optimal relationship writing instruction issued by the user through the human-computer interaction interface, the ideal corresponding relationship is obtained by parsing the optimal relationship writing instruction;

[0019] The ideal corresponding relationship is stored.

[0020] Optionally, the ideal corresponding relationship between each target control parameter and the load rate under the highest system energy efficiency condition at different load rates is obtained by fitting based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled, including:

[0021] According to the nameplate parameters and variable operating condition performance parameters of each target device of the central air conditioner to be regulated, the device model corresponding to each target device is constructed;

[0022] Based on the equipment model of each target equipment and the historical operating data under different working conditions, the load rate under different working conditions and the corresponding average outdoor wet-bulb temperature are determined by statistical methods;

[0023] Based on the equipment model of each target equipment, the load rate under different working conditions and the corresponding outdoor wet-bulb temperature average value, determine the operating parameters and overall energy efficiency value of multiple working conditions of the same load rate and each target equipment under each working condition and the central air conditioner to be regulated;

[0024] For each load rate, the target operating condition with the maximum overall energy efficiency value is taken as the optimal operating condition for the current load rate;

[0025] The ideal corresponding relationship between each target control parameter and the load rate is determined by fitting the operating parameter data under the optimal working condition.

[0026] Optionally, the ideal corresponding relationship between each target control parameter and the load rate is determined by fitting the operating parameter data under the optimal working condition, including:

[0027] For each load rate, obtain the cooling tower approach data and cooling water supply and return water temperature difference data under the optimal working conditions of the current load rate;

[0028] The optimal approximation degree calculation formula is called, and based on the cooling tower approximation degree data, an ideal corresponding relationship between the cooling tower approximation degree and the load rate is obtained by fitting;

[0029] The most cooling water temperature difference calculation formula is called, and based on the cooling water supply and return water temperature difference data, an ideal corresponding relationship between the cooling water supply and return water temperature difference and the load rate is fitted;

[0030] The best approximation calculation formula is: APPROACH = aR 3 +bR 2 +cR+d; the maximum cooling water temperature difference calculation formula is: RANGE=eR 3 +fR 2 +gR+h; APPROACH is the cooling tower approximation, R is the load rate, RANGE is the cooling water supply and return water temperature difference, a, b, c, d, e, f, g and h are fitting parameters.

[0031] Another aspect of the present invention provides an operating condition control device, which is applied to a controller of a central air conditioner having a strong and weak integrated control cabinet, comprising:

[0032] A relationship presetting module is used to fit the ideal corresponding relationship between each target control parameter and the load rate under the highest system energy efficiency condition in different load rates based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled in advance;

[0033] A load calculation module, used to determine the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated;

[0034] An optimal parameter determination module, used to determine the value of each target control parameter according to the ideal corresponding relationship and the current load rate;

[0035] A control module, used for automatically resetting the corresponding control target value based on each target control parameter value, so as to automatically adjust the operating condition of the corresponding target device based on the control target value;

[0036] Among them, the strong and weak integrated control cabinet includes a strong current installation room and a weak current installation room placed in the cabinet and divided by a first shielding plate and a second shielding plate; the electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; the first shielding plate includes a first signal terminal block for collecting inverter signals, and the second shielding plate includes a second signal terminal block for collecting monitoring signals of the controller. The first signal terminal block is connected to the line of the second signal terminal block and the connecting line is located in the cabinet.

[0037] An embodiment of the present invention further provides an electronic device, comprising a processor, wherein the processor is configured to implement the steps of the operating condition control method as described in any of the preceding items when executing a computer program stored in a memory.

[0038] An embodiment of the present invention further provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the operating condition control method as described in any of the preceding items are implemented.

[0039] Finally, the embodiment of the present invention also provides a strong and weak integrated control cabinet, including a strong current installation room and a weak current installation room;

[0040] The strong current installation room and the weak current installation room are placed in the cabinet and are divided by a first shielding plate and a second shielding plate;

[0041] The electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate;

[0042] The first shielding plate includes a frequency converter and a first signal terminal block for collecting frequency converter signals, and the second shielding plate includes a controller and a second signal terminal block for collecting monitoring signals of the controller; the first signal terminal block is connected to the circuit of the second signal terminal block and the connecting circuit is located in the cabinet; the controller is used to implement the steps of the operating condition control method as described in any one of the above items when executing the computer program stored in the memory.

[0043] Optionally, the front door panel of the cabinet further includes a mode switching module;

[0044] The mode switching module is used to switch the control mode, and the control mode includes a manual control mode and an automatic operation mode;

[0045] Among them, the manual control mode is to control the operation of the inverter through the start-stop device, and set the operating frequency of the inverter through the panel of the inverter; the automatic operation mode is that the inverter drives the load to run in the target speed range by receiving the control signal of the controller.

[0046] The advantage of the technical solution provided by the present application is that the cabinet is divided into a strong current room and a weak current room by two shielding plates, so as to realize the integrated design of strong and weak current, with compact and reasonable layout, ingenious and clear structure, easy installation and deployment, and convenient for independent inspection, maintenance and repair by instrument and electrical maintenance personnel; in addition, the signal wiring terminals of the strong and weak current room are arranged in the cabinet through the control cable to complete the line connection of strong and weak current, so as to achieve the function of integrated control of strong and weak current. Thus, the wiring outside the cabinet for a long distance is avoided, the line cost is saved and the installation is convenient, and it has the characteristics of safety, simple structure and reasonable space utilization, and is more conducive to maintenance; further, according to the actual situation of the central air conditioner and the historical operation data, the relationship between different control parameters and load rate under the condition of the highest overall energy efficiency is statistically calculated, and the operating conditions of each target device under different measured loads are adjusted in real time, which can not only solve the problem of regulating the control target with the best overall energy efficiency of the refrigeration room, but also realize the regulation of the number and frequency of operation of multiple devices of the central air conditioner at the same time, which can effectively improve the regulation efficiency of the operating conditions of the target equipment of the centralized refrigeration room of the water-cooled central air conditioner.

[0047] In addition, the embodiments of the present invention also provide corresponding implementation devices, electronic devices, readable storage media and strong and weak integrated control cabinets for the operating condition control method, which further makes the method more practical, and the devices, electronic devices and readable storage media have corresponding advantages.

[0048] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A schematic diagram of a flow chart of an operating condition control method provided by an embodiment of the present invention;

[0051] Figure 2 A structural diagram of a specific implementation of the operating condition control device provided in an embodiment of the present invention;

[0052] Figure 3 A structural diagram of a specific implementation of an electronic device provided by an embodiment of the present invention;

[0053] Figure 4 A structural diagram of a specific implementation of a strong and weak integrated control cabinet provided in an embodiment of the present invention;

[0054] Figure 5 A schematic diagram of the structure of a high-voltage installation room of a high-voltage and low-voltage integrated control cabinet in an exemplary application scenario provided by an embodiment of the present invention;

[0055] Figure 6 A schematic structural diagram of a front panel of a cabinet of a strong and weak integrated control cabinet in an exemplary application scenario provided by an embodiment of the present invention;

[0056] Figure 7 A schematic structural diagram of a back panel of a cabinet body of a strong and weak integrated control cabinet in an exemplary application scenario provided by an embodiment of the present invention;

[0057] Figure 8 A schematic structural diagram of a front panel of a cabinet of a strong and weak integrated control cabinet in an exemplary application scenario provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] The terms "first", "second", "third", "fourth", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0060] After introducing the technical solutions of the embodiments of the present invention, various non-limiting implementation methods of the present application are described in detail below.

[0061] See first Figure 1 , Figure 1 A flow chart of an operating condition control method provided for an embodiment of the present invention, the method is applied to a controller of a central air conditioner with a strong and weak integrated control cabinet, the strong and weak integrated control cabinet includes a strong current installation room and a weak current installation room placed in the cabinet, the strong current installation room and the weak current installation room are separated by a first shielding plate and a second shielding plate, all electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; the first shielding plate includes a first signal terminal row for collecting inverter signals such as the start-up control signal, frequency control signal, and fault feedback signal in the inverter, the second shielding plate includes a second signal terminal row for collecting the monitoring signal of the controller, the first signal terminal row is connected to the line of the second signal terminal row and the connection line is located in the cabinet; the first signal terminal row and the second signal terminal row are used to connect a kind of electrical component of the line, the number of terminal points in each row is different, and its model can be determined according to the needs of the equipment parameters in the actual application scenario. Among them, the process of the controller executing the operating condition control method may include:

[0062] S101: Based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled, an ideal corresponding relationship between each target control parameter and the load rate under the condition of the highest system energy efficiency in different load rates is fitted in advance.

[0063] In this embodiment, the target equipment may include but is not limited to equipment such as chillers, cooling towers, and cooling water pumps. The historical operation data is the operating status data of each target equipment under different load rates and different operating conditions. The physical parameters are the nameplate parameters and variable operating performance parameters of each target equipment. The nameplate parameters include but are not limited to the rated cooling capacity of the chiller, the rated power of the chiller, the rated inlet and outlet water temperature of the chiller evaporator, the rated inlet and outlet water temperature of the chiller condenser, the rated water volume and pressure drop of the chiller evaporator, and the rated water volume and pressure drop of the chiller condenser; the rated flow rate and rated head of the cooling water pump, and the rated power of the cooling water pump; the cooling water flow rate of the cooling tower, the rated approach degree of the cooling tower, and the rated power of the cooling tower fan. Variable operating performance parameters include but are not limited to variable operating performance parameters of chillers, variable operating performance parameters of cooling towers and variable operating performance parameters of cooling water pumps, wherein variable operating performance parameters of chillers may be: cooling capacity, chilled water outlet temperature, cooling water outlet temperature, power; variable operating performance parameters of cooling water pumps may be: flow, head, efficiency, power; variable operating performance parameters of cooling towers may be: volume, water volume, outdoor wet bulb temperature, cooling tower inlet and outlet water temperature difference, heat rejection, tower inlet water temperature, tower outlet water temperature. Technical personnel in the relevant field may select the type of target equipment, historical operating data of certain time periods and the type of physical parameters of each target equipment according to actual conditions, which will not affect the implementation of this application.

[0064] In this embodiment, any mathematical statistical method or machine learning algorithm can be used to process historical operation data and equipment parameter data to fit the corresponding relationship between each target control parameter and the load rate in different working conditions at different load rates. For multiple working conditions at the same load rate, the working condition with the highest overall energy efficiency can be selected as the optimal working condition of the load rate, and the corresponding relationship between each target control parameter and the load rate under the optimal working condition is used as the ideal corresponding relationship between each target control parameter and the load rate of the load rate. The target control parameter is a parameter for controlling the target device, and the target control parameter matches the target device. For example, if the target device is a chiller, a cooling tower, or a cooling water pump, the target control parameter is the cooling tower approach degree and the cooling water supply and return water temperature difference. After determining the ideal corresponding relationship, the ideal corresponding relationship can be stored in a specified location so that it can be directly called when used in subsequent steps. As an optional implementation, the ideal corresponding relationship can be written to the controller by the user through the human-computer interaction module, that is, when the optimal relationship write instruction issued by the user through the human-computer interaction interface is received, the ideal corresponding relationship is obtained by parsing the optimal relationship write instruction; the ideal corresponding relationship is stored.

[0065] S102: Determine the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated.

[0066] In this embodiment, the real-time cooling capacity data of the central air-conditioning to be regulated can be monitored by a cooling capacity meter, and the cooling capacity meter can be deployed in the chilled water main of the refrigeration room. Accordingly, this step can be to obtain the real-time cooling capacity data monitored by the cooling capacity meter of the chilled water main of the refrigeration room; obtain the system rated cooling capacity under the current actual working conditions; calculate the load rate of the current working conditions based on the real-time cooling capacity data and the system rated cooling capacity. Specifically, the ratio of the real-time cooling capacity data to the system rated cooling capacity can be used as the current load rate of the central air-conditioning to be regulated.

[0067] S103: Determine the values ​​of each target control parameter according to the ideal corresponding relationship and the current load rate.

[0068] In S101, the ideal corresponding relationship between each target control parameter and the load rate is determined. For the load rate actually measured in S102, the optimal value of each target control parameter under the current load rate, that is, the target control parameter value, can be calculated based on the ideal corresponding relationship.

[0069] S104: Automatically resetting corresponding control target values ​​based on each target control parameter value, so as to automatically adjust the operating condition of the corresponding target device based on the control target value.

[0070] In this embodiment, the controller will reset the relevant parameter values ​​of the control targets corresponding to the target control parameters by the target control parameter values ​​calculated by S103, that is, the control target values ​​are the parameter values ​​that the controller approaches or reaches the target control parameter values ​​by controlling the target device. For example, when the target control parameters are the cooling tower approach and the cooling water supply and return water temperature difference, and the target device is the cooling tower, the controller automatically resets the corresponding control target values ​​in the controller according to the cooling tower approach and the cooling water supply and return water temperature difference calculated by S103, and then the controller automatically adjusts the number of cooling towers in operation and the operating frequency according to the traditional feedback control program, so that the cooling tower operation approach reaches the calculated optimal approach APPROACH, and at the same time automatically adjusts the operating frequency of the cooling water pump, so that the cooling water supply and return water temperature difference reaches the calculated optimal cooling water temperature difference RANGE, so that the various devices in the refrigeration room system can achieve unified and coordinated control based on the optimal overall energy efficiency of the refrigeration room.

[0071] In the technical solution provided by the embodiment of the present invention, the inside of the cabinet is divided into a strong current room and a weak current room by two shielding plates, so as to realize the integrated design of strong and weak current, with compact and reasonable layout, ingenious and clear structure, easy installation and deployment, and convenient for independent inspection, maintenance and repair by instrument and electrical maintenance personnel; in addition, the signal wiring terminals of the strong and weak current rooms are arranged in the cabinet through the control cable to complete the line connection of strong and weak current, so as to achieve the function of integrated control of strong and weak current. Thus, the wiring outside the cabinet for a long distance is avoided, the line cost is saved and the installation is convenient, and the wiring is safe, simple in structure and reasonable in space utilization, and it is more conducive to maintenance; further, according to the actual situation of the central air conditioner and the historical operation data, the relationship between different control parameters and load rate under the condition of the highest overall energy efficiency is statistically calculated, and the operating conditions of each target device under different measured loads are adjusted in real time, which can not only solve the problem of regulating the control target with the best overall energy efficiency of the refrigeration room, but also realize the regulation of the number and frequency of operation of multiple devices of the central air conditioner at the same time, which can effectively improve the regulation efficiency of the operating conditions of the target devices in the centralized refrigeration room of the water-cooled central air conditioner.

[0072] It should be noted that there is no strict order of execution between the steps in this application. As long as they comply with the logical order, these steps can be executed simultaneously or in a certain preset order. Figure 1 This is just a schematic and does not mean that this is the only execution order.

[0073] In the above embodiment, there is no limitation on how to perform step S101. In this embodiment, a method for determining an ideal corresponding relationship is provided, which may include the following steps:

[0074] According to the nameplate parameters and variable operating condition performance parameters of each target device of the central air conditioner to be regulated, the device model corresponding to each target device is constructed;

[0075] Based on the equipment model of each target equipment and the historical operating data under different working conditions, the load rate under different working conditions and the corresponding average outdoor wet-bulb temperature are determined by statistical methods;

[0076] Based on the equipment model of each target equipment, the load rate under different working conditions and the corresponding average outdoor wet-bulb temperature, determine the operating parameters and overall energy efficiency value of various working conditions of the same load rate and each target equipment and the central air conditioner to be controlled under each working condition;

[0077] For each load rate, the target operating condition with the maximum overall energy efficiency value is taken as the optimal operating condition for the current load rate;

[0078] The ideal corresponding relationship between each target control parameter and the load rate is determined by fitting the operating parameter data under the optimal working conditions.

[0079] In this embodiment, in order to make the technical personnel in the relevant field more clearly understand the technical solution of the present application, the present application takes the target control parameters as the cooling tower approach degree and the cooling water supply and return water temperature difference, and the target equipment as the chiller, cooling tower, and cooling water pump as an example to explain the entire technical solution:

[0080] A1: Modeling and simulation are performed based on the nameplate parameters and variable operating performance parameters of equipment such as chillers, cooling towers, and cooling water pumps, and a traversal optimization program is generated.

[0081] The established models include chiller model, cooling tower model and cooling water pump model. The chiller model is used to obtain the COP (Coefficient Of Performance, the conversion ratio between energy and heat) of the chiller under non-rated working conditions, the cooling tower model is used to obtain the outlet water temperature of the cooling tower under non-rated working conditions, and the cooling water pump model is used to obtain the power of the water pump under non-rated working conditions. The traversal optimization program includes the load rate R calculated based on the historical operating data of the above equipment using statistical methods such as normal distribution and the average value of the outdoor wet-bulb temperature corresponding to each load rate R; the traversal optimization program can be used to determine the optimal value of the total energy efficiency of the chiller, cooling water pump and cooling tower.

[0082] A2: Based on the load rate R in A1 and the average value of the outdoor wet-bulb temperature corresponding to each load rate R, the above-mentioned traversal optimization procedure is used to calculate the COP and power of the chiller, the cooling tower outlet water temperature and power, the cooling water pump power, the total energy efficiency of the chiller, cooling water pump and cooling tower, and obtain the pre-simulation database.

[0083] The pre-simulation database contains all the load rates R in A1 and the corresponding multiple working conditions under each load rate R. Under each working condition, there are various operating parameters corresponding to each device and its system, as well as the overall energy efficiency value in the system parameters. In other words, many possible working conditions are traversed under each load rate in the pre-simulation database, and then the cooling tower approach and cooling water supply and return water temperature difference under the working condition with the highest overall energy efficiency under each load rate can be found in the pre-simulation database.

[0084] A3: Find the cooling tower approximation and cooling water supply and return water temperature difference for the operating condition with the highest overall energy efficiency at each load rate R in the pre-simulation database.

[0085] A4: Fit the statistical data in A3 to obtain the relationship formula between the cooling tower approximation degree, the cooling water supply and return water temperature difference and the load rate R under each load rate R, which is the working condition with the highest overall energy efficiency.

[0086] For each load rate, obtain the cooling tower approach data and cooling water supply and return water temperature difference data under the optimal working conditions of the current load rate;

[0087] The best approximation calculation formula is called, and based on the cooling tower approximation data, the ideal corresponding relationship between the cooling tower approximation and the load rate is fitted;

[0088] The ideal corresponding relationship between the cooling water supply and return water temperature difference and the load rate is obtained by calling the cooling water temperature difference calculation formula based on the cooling water supply and return water temperature difference data;

[0089] The best approximation calculation formula is: APPROACH = aR 3 +bR 2 +cR+d; the maximum cooling water temperature difference calculation formula is: RANGE=eR 3 +fR 2 +gR+h; APPROACH is the cooling tower approximation, R is the load rate, RANGE is the cooling water supply and return water temperature difference, a, b, c, d, e, f, g and h are fitting parameters, and the fitting parameters can be positive or negative.

[0090] In this embodiment, the single variable used in the whole process is the load rate. The real-time monitoring of the load rate only needs to install a cold meter on the chilled water main pipe. It belongs to the monitoring project of the conventional refrigeration room. The data is easy to obtain and easy to implement. According to the actual situation of the project and the historical operation data, the modeling simulation and traversal optimization program are customized, and then the pre-simulation database is calculated by this method, and the relationship formula between the cooling tower approach degree, the cooling water supply and return water temperature difference and the load rate under the overall highest energy efficiency working condition is statistically obtained in the pre-simulation database. Thus, the relationship between the control parameter and the load rate when the overall energy efficiency is at its best can be statistically obtained, and the problem of regulating the overall energy efficiency of the refrigeration room as the control target can be solved. The cooling tower approach degree and the cooling water supply and return water temperature difference are used as the optimization parameters for regulating the overall energy efficiency best working condition, which is consistent with the control method of adjusting the number and frequency of cooling towers in operation according to the cooling tower approach degree and adjusting the cooling water pump operating frequency according to the cooling water supply and return water temperature difference in the actual field, so that the overall efficient regulation method can be implemented on the control cabinet.

[0091] The embodiment of the present invention also provides a corresponding device for the operating condition control method, which further makes the method more practical. Among them, the device can be described from the perspective of functional modules and hardware. The operating condition control device provided by the embodiment of the present invention is introduced below. The operating condition control device described below and the operating condition control method described above can be referred to each other.

[0092] From the perspective of functional modules, see Figure 2 , Figure 2The structural diagram of the operating condition control device provided in the embodiment of the present invention under a specific implementation mode is applied to the controller of a central air conditioner with a strong and weak integrated control cabinet, the strong and weak integrated control cabinet includes a strong current installation room and a weak current installation room placed in the cabinet and divided by a first shielding plate and a second shielding plate; the electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; the first shielding plate includes a first signal terminal block for collecting inverter signals, the second shielding plate includes a second signal terminal block for collecting monitoring signals of the controller, and the first signal terminal block is connected to the line of the second signal terminal block and the connecting line is placed in the cabinet. Among them, the device may include:

[0093] The relationship presetting module 201 is used to fit the ideal corresponding relationship between each target control parameter and the load rate under the highest system energy efficiency condition in different load rates based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled in advance;

[0094] The load calculation module 202 is used to determine the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated;

[0095] The optimal parameter determination module 203 is used to determine the value of each target control parameter according to the ideal corresponding relationship and the current load rate;

[0096] A control module 204, configured to automatically reset a corresponding control target value based on each target control parameter value, so as to automatically adjust an operating condition of a corresponding target device based on the control target value;

[0097] Optionally, in some implementations of the present embodiment, the load calculation module 202 may also be used to: obtain real-time cooling capacity data monitored by the cooling capacity meter of the chilled water main in the refrigeration room; obtain the rated cooling capacity of the system under the current actual operating conditions; calculate the load rate of the current operating conditions based on the real-time cooling capacity data and the rated cooling capacity of the system, as the current load rate of the central air conditioner to be controlled.

[0098] In some other implementations of this embodiment, the front door panel of the cabinet of the above-mentioned integrated power and power control cabinet also includes a human-computer interaction module, and the device may also include:

[0099] The configuration module is used to obtain an ideal corresponding relationship by parsing the optimal relationship writing instruction when receiving the optimal relationship writing instruction issued by the user through the human-computer interaction interface;

[0100] The storage module is used to store the ideal corresponding relationship.

[0101] Optionally, in some other implementations of the present embodiment, the above-mentioned relationship pre-setting module 201 can also be used to: construct a device model corresponding to each target device according to the nameplate parameters and variable operating condition performance parameters of each target device of the central air-conditioning to be regulated; determine the load rate and the corresponding outdoor wet-bulb temperature average value under different operating conditions by statistical methods based on the device model of each target device and the historical operating data under different operating conditions; determine multiple operating conditions of the same load rate and the operating parameters and overall energy efficiency values ​​of each target device and the central air-conditioning to be regulated under each operating condition based on the device model of each target device, the load rate under different operating conditions and the corresponding outdoor wet-bulb temperature average value; for each load rate, take the target operating condition with the largest overall energy efficiency value as the optimal operating condition for the current load rate; and determine the ideal correspondence between each target control parameter and the load rate by fitting the operating parameter data under the optimal operating condition.

[0102] As an optional implementation of the above embodiment, the above relationship presetting module 201 can also be further used to: for each load rate, obtain the cooling tower approximation data and the cooling water supply and return water temperature difference data under the optimal working conditions of the current load rate; call the best approximation calculation formula, based on the cooling tower approximation data, fit to obtain the ideal corresponding relationship between the cooling tower approximation and the load rate; call the cooling water temperature difference calculation formula, based on the cooling water supply and return water temperature difference data, fit to obtain the ideal corresponding relationship between the cooling water supply and return water temperature difference and the load rate; the best approximation calculation formula is: APPROACH=aR 3 +bR 2 +cR+d; the maximum cooling water temperature difference calculation formula is: RANGE=eR 3 +fR 2 +gR+h; APPROACH is the cooling tower approximation, R is the load rate, RANGE is the cooling water supply and return water temperature difference, a, b, c, d, e, f, g and h are fitting parameters.

[0103] The functions of the functional modules of the operating condition control device in the embodiment of the present invention can be specifically implemented according to the method in the above method embodiment. The specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0104] It can be seen from the above that this embodiment can effectively improve the efficiency of regulating the operating conditions of the target equipment in the centralized refrigeration room of the water-cooled central air-conditioning.

[0105] The operating condition control device mentioned above is described from the perspective of functional modules. Furthermore, the present application also provides an electronic device, which is described from the perspective of hardware. Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application in one implementation manner. Figure 3As shown, the electronic device includes a memory 30 for storing a computer program; and a processor 31 for implementing the steps of the operating condition control method mentioned in any of the above embodiments when executing the computer program.

[0106] Among them, the processor 31 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the processor 31 may also be a controller, a microcontroller, a microprocessor or other data processing chip. The processor 31 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 31 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 31 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 31 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0107] The memory 30 may include one or more computer-readable storage media, which may be non-transitory. The memory 30 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash storage devices. In some embodiments, the memory 30 may be an internal storage unit of an electronic device, such as a hard disk of a server. In other embodiments, the memory 30 may also be an external storage device of an electronic device, such as a plug-in hard disk equipped on a server, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. Further, the memory 30 may also include both an internal storage unit of an electronic device and an external storage device. The memory 30 may not only be used to store application software and various types of data installed in the electronic device, such as: the code of the program for executing the vulnerability processing method, etc., but also be used to temporarily store data that has been output or is to be output. In this embodiment, the memory 30 is at least used to store the following computer program 301, wherein, after the computer program is loaded and executed by the processor 31, the relevant steps of the operating condition control method disclosed in any of the aforementioned embodiments can be implemented. In addition, the resources stored in the memory 30 may also include an operating system 302 and data 303, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 302 may include Windows, Unix, Linux, etc. The data 303 may include but is not limited to data corresponding to the operating condition control results, etc.

[0108] In some embodiments, the electronic device may further include a display screen 32, an input / output interface 33, a communication interface 34 or a network interface, a power supply 35 and a communication bus 36. Among them, the display screen 32 and the input / output interface 33 such as a keyboard belong to the user interface, and the optional user interface may also include a standard wired interface, a wireless interface, etc. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device, etc. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device and to display a visual user interface. The communication interface 34 may optionally include a wired interface and / or a wireless interface, such as a WI-FI interface, a Bluetooth interface, etc., which is usually used to establish a communication connection between the electronic device and other electronic devices. The communication bus 36 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0109] Those skilled in the art will understand that Figure 3 The structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than those shown in the figure, for example, it may also include a sensor 37 for realizing various functions.

[0110] The functions of the functional modules of the electronic device in the embodiment of the present invention can be specifically implemented according to the method in the above method embodiment. The specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0111] It can be seen from the above that this embodiment can effectively improve the efficiency of regulating the operating conditions of the target equipment in the centralized refrigeration room of the water-cooled central air-conditioning.

[0112] It is understandable that if the operating condition control method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), electrically erasable programmable ROM, register, hard disk, multimedia card, card-type memory (such as SD or DX memory, etc.), magnetic memory, removable disk, CD-ROM, disk or optical disk, etc. Various media that can store program codes.

[0113] Based on this, an embodiment of the present invention further provides a readable storage medium storing a computer program. When the computer program is executed by a processor, the steps of the operating condition control method in any of the above embodiments are performed.

[0114] The embodiment of the present invention also provides a strong and weak integrated control cabinet, see Figure 4 , which may include the following:

[0115] The strong and weak integrated control cabinet is used to realize the regulation of the operating conditions of the target equipment of the central air conditioner, which includes a strong current installation room 41 and a weak current installation room 42. The strong current installation room 41 and the weak current installation room 42 are placed in the cabinet of the strong and weak integrated control cabinet, which are divided by a first shielding plate and a second shielding plate. For example, the strong current installation room 41 can be arranged on the front of the interior of the cabinet, and the weak current installation room 42 can be arranged on the back of the interior of the cabinet. Two shielding installation plates are arranged inside the cabinet, and the strong current components are installed on the first shielding installation plate to form a strong current installation room, and the weak current components are installed on the shielding installation plate to form a weak current installation room, that is, the electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate. The electronic components contained in the strong current installation room 41 and the weak current installation room 42 can be the same as the existing strong current installation room 41 and the weak current installation room 42. The interior of the cabinet is divided into a high-voltage room and a low-voltage room by setting two shielding mounting plates, realizing an integrated design of high and low-voltage electricity. The layout is compact and reasonable, the structure is ingenious and clear, and it is easy to install and deploy, making it convenient for instrument and electrical maintenance personnel to independently inspect, maintain and repair it.

[0116] The first shielding plate includes a frequency converter and a first signal terminal block for collecting frequency converter signals, that is, the start-up control signal, frequency control signal, and fault feedback signal in the frequency converter can be uniformly collected on the signal terminal block. The second shielding plate includes a controller and a second signal terminal block for collecting monitoring signals of the controller, that is, the monitoring signals of the controller can be collected on the second signal terminal block. In order to facilitate wiring, the first signal terminal block can be located at the bottom of the first shielding plate, and the second signal terminal block can be located at the bottom of the second shielding plate. The first signal terminal block is connected to the line of the second signal terminal block and the connection line is placed in the cabinet. The first signal terminal block and the second signal terminal block are connected in the cabinet through the control cable to complete the line connection of strong and weak electricity, so as to achieve the function of integrated control of strong and weak electricity. In this way, the wiring outside the cabinet for a long distance is avoided, the line cost is saved and the installation is convenient. It has the characteristics of safety, simple structure and reasonable space utilization, and is more conducive to maintenance.

[0117] The controller of this embodiment is used to implement the steps of the operating condition control method recorded in any of the above embodiments when executing the computer program stored in the memory.

[0118] The functions of each functional module of the integrated strong and weak control cabinet in the embodiment of the present invention can be specifically implemented according to the method in the above method embodiment. The specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0119] It can be seen from the above that this embodiment can effectively improve the efficiency of regulating the operating conditions of the target equipment in the centralized refrigeration room of the water-cooled central air-conditioning.

[0120] As an optional implementation, in order to improve the practicality of the strong and weak integrated control cabinet and enhance the user experience, based on the above embodiment, the strong and weak integrated control cabinet may further include a front door panel located on the cabinet body and a mode switching module;

[0121] The mode switching module is used to switch the control mode, which includes manual control mode and automatic operation mode; among them, the manual control mode is to control the operation of the inverter through the start-stop device, and set the operating frequency of the inverter through the inverter panel; the automatic operation mode is that the inverter drives the load to run in the target speed range by receiving the control signal of the controller.

[0122] In this embodiment, the mode switching module can be realized by the manual / automatic switching operation knob. The manual / automatic switching operation knob is placed in the manual position, the load isolation switch of the high-voltage installation room 41 is closed, the main incoming power supply is connected, the small circuit breaker is closed to connect the power supply circuit of the inverter input end, and the fuse protection device provides overcurrent fuse protection for the secondary circuit. Press the start / stop button to start the inverter. Through the inverter control panel, manually set the inverter operating frequency, and drive the water pump motor to run at the manually set speed. Put the manual / automatic switching operation knob in the automatic position, turn on the control power switch, and the switch power supply module of the weak-voltage installation room 42 outputs a DC24V power supply. The controller is powered on and starts working. The controller receives external temperature and humidity signals and official pressure analog signals, and then processes the data according to the preset energy-saving strategy, and sends the water pump or fan start signal and the optimal speed command of the current operating environment to the inverter. The inverter will drive the load to run in the optimal speed range according to the given signal of the controller.

[0123] In order to make the technical personnel in the relevant field more clearly understand the calculation scheme of this application, this application is combined with Figure 5-Figure 8 The strong and weak integrated control cabinet shown is a schematic example and may include the following contents:

[0124] The strong and weak integrated control cabinet comprises a cabinet body, wherein a strong current room is arranged on the front of the cabinet body, a weak current room is arranged on the back of the cabinet body, and two shielding installation plates are arranged inside the cabinet body. The strong current components are installed on the shielding installation plates (1) to form a strong current installation room, and the weak current components are installed on the shielding installation plates (26) to form a weak current installation room.

[0125] The strong current installation room is provided with a shielding installation plate (1), a small circuit breaker (2), a load isolating switch (3), a multifunctional rail-mounted instrument (4), a frequency converter (5), an intermediate relay (6), a fuse protection device (7), a current transformer (8), and a signal wiring terminal block (9). The weak current installation room is provided with a shielding installation plate (26), a switching power supply module (10), a socket (11), a control power switch (12), a gateway (13), a network switch (14), a signal wiring terminal block (15), and a controller (16). The front door panel of the cabinet is provided with an integrated computer operation screen (17), an operation and fault signal indicator light (18), a manual / automatic switching operation knob (19), a start / stop button (20), a cabinet door key lock (21), and a heat dissipation hole (22). The back door panel of the cabinet is provided with a heat dissipation fan (23), a cabinet door key lock (24), and a heat dissipation hole (25).

[0126] The control mode of the above-mentioned integrated power control cabinet includes a manual / automatic operation mode. The manual / automatic switching operation knob (19) is placed in the manual position, the load isolation switch (3) is closed, the main incoming power supply is connected, the small circuit breaker (2) is closed to connect the power supply circuit of the inverter input end, the fuse protection device (7) provides overcurrent fuse protection for the secondary circuit, and the start / stop button (20) is pressed to run the inverter. Through the inverter control panel, the inverter operating frequency is manually set, and the water pump motor is driven to operate at the manually set speed. The manual / automatic switching operation knob (19) is placed in the automatic position, the control power switch (12) is turned on, the switch power module (10) outputs a DC24V power supply, and the controller (16) is powered on and starts to work. The controller (16) receives external temperature and humidity signals and the official pressure analog signal, and then controls the computer program to process the data according to the preset operating conditions, and sends the water pump or fan start signal and the optimal speed command of the current operating environment to the inverter (5). The inverter (5) will drive the load to run in the optimal speed range according to the given signal of the controller (16).

[0127] Among them, the operating condition control computer program is used to implement the following steps when it is called:

[0128] B1. Based on the historical operating data and physical parameters of the chiller, cooling tower and cooling water pump of the central air conditioner to be controlled, the relationship between the cooling tower approximation degree, the cooling water supply and return water temperature difference and the load rate R under each load rate R with the highest overall energy efficiency is fitted.

[0129] B2. Write the corresponding relationship determined in step B1 into the controller through the all-in-one computer operation screen.

[0130] B3. The controller calculates the load rate R based on the real-time cooling capacity data monitored by the cooling capacity meter installed on the chilled water main in the refrigeration room through the formula: system load rate R = actual cooling capacity of the system / rated cooling capacity of the system under nominal conditions.

[0131] B4. The controller substitutes the load rate R in step B3 into the corresponding relationship in step B1, and calculates the cooling tower approximation APPROACH1 and the cooling water supply and return water temperature difference RANGE1 under the load rate R.

[0132] The cooling tower approximation APPROACH1 calculated above is the cooling tower approximation for the condition with the highest overall energy efficiency, that is, the optimal approximation APPROACH; the cooling water supply and return water temperature difference RANGE1 calculated above is the cooling water temperature difference for the condition with the highest overall energy efficiency, that is, the optimal cooling water temperature difference RANGE.

[0133] B5. The controller will automatically reset the corresponding control target value in the controller according to the calculated APPROACH1 and RANGE1. Then the controller will automatically adjust the number of operating cooling towers and the operating frequency according to the traditional feedback control program, so that the operating approximation of the cooling tower reaches the calculated optimal approximation APPROACH. At the same time, the controller will automatically adjust the operating frequency of the cooling water pump so that the cooling water supply and return water temperature difference reaches the calculated optimal cooling water temperature difference RANGE.

[0134] The high-efficiency control cabinet of the embodiment of the invention can realize the manual / automatic control of each device by software selection, and then realize the one-key startup / one-key shutdown, scheduled start and stop, operation mode switching, and heating / cooling mode switching of the system. Relying on the software system, network communication, high-performance controller, inverter, and peripheral sensors, the various devices in the refrigeration room system can realize unified coordinated control based on the optimal overall energy efficiency of the refrigeration room, and realize overall efficient regulation.

[0135] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the hardware disclosed in the embodiments, including devices and electronic devices, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0136] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0137] The above is a detailed introduction to an operating condition control method, device, electronic device, readable storage medium and strong and weak integrated control cabinet provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A method for controlling operating conditions, characterized in that: Controllers for central air conditioners with integrated power and power control cabinets include: Based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled, the ideal corresponding relationship between each target control parameter and the load rate under the highest system energy efficiency condition at different load rates is fitted; Determining the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated; Determining each target control parameter value according to the ideal corresponding relationship and the current load rate; Automatically resetting the corresponding control target value based on each target control parameter value to automatically adjust the operating condition of the corresponding target device based on the control target value; Wherein, the strong and weak integrated control cabinet comprises a strong current installation room and a weak current installation room which are placed in the cabinet and divided by a first shielding plate and a second shielding plate; the electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; the first shielding plate comprises a first signal terminal block for collecting inverter signals, the second shielding plate comprises a second signal terminal block for collecting monitoring signals of the controller, the first signal terminal block is connected to the line of the second signal terminal block, and the connecting line is located in the cabinet; The ideal corresponding relationship between each target control parameter and the load rate under the highest system energy efficiency condition in different load rates is obtained by fitting based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled, including: According to the nameplate parameters and variable operating condition performance parameters of each target device of the central air conditioner to be regulated, the device model corresponding to each target device is constructed; Based on the equipment model of each target equipment and the historical operating data under different working conditions, the load rate under different working conditions and the corresponding average outdoor wet-bulb temperature are determined by statistical methods; Based on the equipment model of each target equipment, the load rate under different working conditions and the corresponding outdoor wet-bulb temperature average value, determine the operating parameters and overall energy efficiency value of multiple working conditions of the same load rate and each target equipment under each working condition and the central air conditioner to be regulated; For each load rate, the target operating condition with the maximum overall energy efficiency value is taken as the optimal operating condition for the current load rate; For each load rate, obtain the cooling tower approach data and cooling water supply and return water temperature difference data under the optimal working conditions of the current load rate; The optimal approximation calculation formula is called, and based on the cooling tower approximation data and the load rate data, an ideal corresponding relationship between the cooling tower approximation and the load rate is obtained by fitting; The optimal cooling water temperature difference calculation formula is called, and based on the cooling water supply and return water temperature difference data and the load rate data, an ideal corresponding relationship between the cooling water supply and return water temperature difference and the load rate is fitted; The best approximation calculation formula is: APPROACH = aR 3 +bR 2 +cR+d; the optimal cooling water temperature difference calculation formula is: RANGE=eR 3 +fR 2 +gR+h; APPROACH is the cooling tower approximation, R is the load rate, RANGE is the cooling water supply and return water temperature difference, a, b, c, d, e, f, g and h are fitting parameters.

2. The operating condition control method according to claim 1, characterized in that: The determining the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated includes: Obtain the real-time cooling capacity data monitored by the cooling capacity meter of the chilled water main in the refrigeration room; Obtain the system rated cooling capacity under current actual working conditions; The load rate of the current actual working condition is calculated based on the real-time cooling capacity data and the rated cooling capacity of the system to serve as the current load rate of the central air conditioner to be regulated.

3. The operating condition control method according to claim 2, characterized in that: The front door panel of the cabinet of the integrated power and power control cabinet further includes a human-machine interaction module, and before determining the target control parameter value according to the ideal corresponding relationship and the current load rate, it also includes: When receiving the optimal relationship writing instruction issued by the user through the human-computer interaction interface, the ideal corresponding relationship is obtained by parsing the optimal relationship writing instruction; The ideal corresponding relationship is stored.

4. An operating condition control device, characterized in that: Controllers for central air conditioners with integrated power and power control cabinets include: The control parameter presetting module is used to fit the ideal correspondence between each target control parameter and the load rate under the highest system energy efficiency conditions at different load rates based on the historical operation data and physical parameters of each target device of the central air conditioner to be controlled; A load rate calculation module, used to determine the current load rate of the central air conditioner to be regulated based on the real-time cooling capacity data of the central air conditioner to be regulated; An optimal parameter determination module, used to determine the value of each target control parameter according to the ideal corresponding relationship and the current load rate; A control module, used for automatically resetting the corresponding control target value based on each target control parameter value, so as to automatically adjust the operating condition of the corresponding target device based on the control target value; Wherein, the strong and weak integrated control cabinet comprises a strong current installation room and a weak current installation room which are placed in the cabinet and divided by a first shielding plate and a second shielding plate; the electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; the first shielding plate comprises a first signal terminal block for collecting inverter signals, the second shielding plate comprises a second signal terminal block for collecting monitoring signals of the controller, the first signal terminal block is connected to the line of the second signal terminal block, and the connecting line is located in the cabinet; Wherein, the relationship presetting module is further used for: According to the nameplate parameters and variable operating condition performance parameters of each target device of the central air conditioner to be regulated, the device model corresponding to each target device is constructed; Based on the equipment model of each target equipment and the historical operating data under different working conditions, the load rate under different working conditions and the corresponding average outdoor wet-bulb temperature are determined by statistical methods; Based on the equipment model of each target equipment, the load rate under different working conditions and the corresponding outdoor wet-bulb temperature average value, determine the operating parameters and overall energy efficiency value of multiple working conditions of the same load rate and each target equipment under each working condition and the central air conditioner to be regulated; For each load rate, the target operating condition with the maximum overall energy efficiency value is taken as the optimal operating condition for the current load rate; For each load rate, obtain the cooling tower approach data and cooling water supply and return water temperature difference data under the optimal working conditions of the current load rate; The optimal approximation degree calculation formula is called, and based on the cooling tower approximation degree data, an ideal corresponding relationship between the cooling tower approximation degree and the load rate is obtained by fitting; The optimal cooling water temperature difference calculation formula is called, and based on the cooling water supply and return water temperature difference data, an ideal corresponding relationship between the cooling water supply and return water temperature difference and the load rate is fitted; The best approximation calculation formula is: APPROACH = aR 3 +bR 2 +cR+d; the optimal cooling water temperature difference calculation formula is: RANGE=eR 3 +fR 2 +gR+h; APPROACH is the cooling tower approximation, R is the load rate, RANGE is the cooling water supply and return water temperature difference, a, b, c, d, e, f, g and h are fitting parameters.

5. An electronic device, characterized in that: It comprises a processor and a memory, wherein the processor is used to implement the steps of the operating condition control method as claimed in any one of claims 1 to 3 when executing the computer program stored in the memory.

6. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the operating condition control method according to any one of claims 1 to 3 are implemented.

7. A strong and weak integrated control cabinet, characterized in that: Including strong current installation room and weak current installation room; The strong current installation room and the weak current installation room are placed in the cabinet and are divided by a first shielding plate and a second shielding plate; The electronic components of the strong current installation room are deployed on the first shielding plate, and the electronic components of the weak current installation room are deployed on the second shielding plate; The first shielding plate includes a frequency converter and a first signal terminal block for collecting frequency converter signals, and the second shielding plate includes a controller and a second signal terminal block for collecting monitoring signals of the controller; the first signal terminal block is connected to the circuit of the second signal terminal block and the connecting circuit is located in the cabinet; the controller is used to implement the steps of the operating condition control method as described in any one of claims 1 to 3 when executing the computer program stored in the memory.

8. The strong and weak integrated control cabinet according to claim 7 is characterized in that: The front door panel of the cabinet also includes a mode switching module; The mode switching module is used to switch the control mode, and the control mode includes a manual control mode and an automatic operation mode; Among them, the manual control mode is to control the operation of the inverter through the start-stop device, and set the operating frequency of the inverter through the panel of the inverter; the automatic operation mode is that the inverter drives the load to run in the target speed range by receiving the control signal of the controller.

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