Intelligent control system and control method of efficient composite cooling and condensing equipment

Abstract

The invention relates to the technical field of cooling equipment, and provides an intelligent control system and a control method of efficient composite cooling and condensing equipment, and the intelligent control system comprises a fan which is installed at the top position of the composite cooling equipment and is used for providing airflow to realize forced heat exchange of the equipment; the data acquisition module is used for acquiring key parameter information in an equipment operation process; the vibration monitoring module is used for detecting the vibration condition of the fan in the operation process; the flow guide adjusting modules are arranged at the upper position and the lower position of the side wall of the equipment and used for opening and closing an airflow channel and adjusting the air volume; the operation conditions of the efficient composite cooling equipment are divided into different modes through the preset program, and when the external conditions change, the programmable logic controller is used for adjusting and controlling the operation states of all parts of the efficient composite cooling equipment in real time; therefore, the efficient composite cooling equipment can normally work under requirements under the condition of unmanned operation, and intelligent operation is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cooling equipment, and particularly relates to an intelligent control system and a control method for an efficient composite cooling and condensing equipment. Background Art

[0002] Cooling (condensing) equipment is an important basic equipment widely used in the industrial cooling technology field, and is also a device with high energy and water consumption in the industrial cooling system. The efficient composite cooling (condensing) equipment is an optimized combination of evaporation heat exchange mainly based on evaporative cooling and auxiliary air cooling for waste energy reuse and other heat exchange methods, which uses one power to complete two or more tasks, and has the advantages of energy saving, water saving, small floor area, low investment cost, etc., and is applicable to the condensation and cooling of various process media in industries such as petroleum, chemical industry, metallurgy, refrigeration, and electric power. At present, the efficient composite cooling (condensing) equipment usually controls the terminal temperature by means of a frequency converter. As the frequency conversion frequency decreases, the overall air volume of the equipment is greatly reduced, which greatly limits the overall efficiency of the equipment. At the same time, the heat exchange capacity of the evaporation section increases by about 1 - 50 times when the temperature drops, while the heat exchange capacity of the air cooling section increases by about 1 - 3 times. It is difficult for the system to accurately control the terminal temperature according to the change of the external air temperature, and it is very easy to have an overcooling phenomenon. The specific problems are as follows: 1. It is difficult to control the cooling (condensing) terminal temperature of process equipment; 2. A single cooling (condensing) mode cannot adapt to a changing environment, resulting in energy efficiency fluctuations; 3. The system lacks real-time tracking and optimization analysis of water consumption and energy consumption; 4. Manual adjustment is lagging and it is difficult to achieve process stability; 5. After the equipment is scaled up, the inspection volume is large and the maintenance difficulty is high. Summary of the Invention

[0003] The present invention provides an intelligent control system for an efficient composite cooling and condensing equipment to solve the problems of difficult temperature control, inability to adapt to a changing environment, and inability to track data in real time existing in the existing composite cooling equipment mentioned in the background art.

[0004] The technical solution adopted by the present invention is: an intelligent control system for an efficient composite cooling and condensing equipment, including: A fan, which is installed at the top position of the composite cooling equipment and is used to provide air flow to achieve forced heat exchange of the equipment; A data acquisition module, which is used to collect key parameter information during the operation of the equipment; it includes a vibration monitoring module for detecting the vibration condition of the fan during operation; A diversion adjustment module, which is arranged at two positions, upper and lower, on the side wall of the equipment and is used to open, close and adjust the air volume of the air flow channel to adapt to the heat exchange requirements under different operating conditions; The control module is electrically connected to the fan, the diversion adjustment module, and the data acquisition module. It is used to receive the equipment operation parameters collected by the data acquisition module and output control instructions based on a preset control strategy to adjust the rotation speed of the fan and the ventilation state of the diversion adjustment module, so as to achieve precise control of the cooling air flow rate and flow path, thereby maintaining the stable operation of the process outlet temperature of the cooling equipment. The human-machine interaction interface is connected to the control module and is used to display the equipment operation status and implement parameter setting. The mobile terminal communication module is used to connect the control module to the mobile phone APP, and remotely view the operation status, set operation parameters, control the start and stop of the equipment, and receive alarm information through the mobile phone APP.

[0005] The vibration monitoring module is a vibration transmitter or a vibration sensor, which is installed on the side of the fan.

[0006] The data acquisition module further includes: The process medium flowmeter is used to monitor the flow rate of the process medium flowing inside the equipment. There are multiple temperature and humidity sensors, which are used to monitor the real-time temperature and humidity values inside and outside the equipment, as well as the temperature value of the process medium after cooling. The make-up water flowmeter is connected to the make-up water pipe of the equipment circulation water tank to monitor the pipeline flow rate during make-up water. The sewage flowmeter is connected to the equipment sewage pipeline to monitor the pipeline flow rate during the sewage discharge process.

[0007] The diversion adjustment module is an electric louver or a pneumatic louver installed on the equipment.

[0008] It further includes a spray module, which includes a water pump motor. The water pump motor is connected to the control module and is used to control the opening and closing of the water pump motor through the control module.

[0009] The control module is a programmable logic controller, which includes: The status analysis module is used to analyze the collected basic data and evaluate whether the system is in a normal operation state. The data storage module is used to store the collected real-time data. The network communication module is used to realize information transmission with the human-machine interaction interface and the mobile terminal communication module. The cost measurement module is used to analyze and process the data collected by the data acquisition module, generate the total cost generated during the operation of the equipment, and compare it with the preset cost.

[0010] This application also provides a control method for the intelligent control system of the above-mentioned high-efficiency composite cooling and condensation equipment, including the following steps: Step 1: The key parameter information during the operation of the device is collected by the data acquisition module. The key parameter information includes fan vibration information, process medium flow information, temperature and humidity information, makeup water flow information, and sewage flow information, and the collected information is transmitted to the control module. Step 2: The control module receives the key parameter information and analyzes and judges it through the status analysis module to identify whether the current operating state of the system is normal. Step 3: Based on the preset control strategy, the control module automatically outputs control instructions to adjust the speed of the fan and the ventilation state of the diversion adjustment module, realizing the dynamic adjustment of the internal cooling air flow and air flow path of the device, so as to keep the process outlet temperature within the set value range.

[0011] In the above Step 3, it also includes: The control module records in real time according to the operation data during the control process through the data storage module, and the cost measurement module conducts cost accounting. The control module conducts data interaction with the human-machine interface and the mobile terminal communication module through the network communication module, enabling operators to view the device operation status, set operation parameters, receive alarm information, and control the start and stop of the device locally or remotely through the human-machine interface or the mobile phone APP.

[0012] When the control module identifies that the system state is abnormal or the parameters exceed the limit, it sends alarm information to the human-machine interface and the mobile terminal, and automatically executes the corresponding safety control logic, including reducing the fan speed, adjusting the louver opening, or stopping the spraying.

[0013] In Step 3, the control strategy based on by the control module includes: When the ambient temperature is between the set water cut-off temperature and the design temperature, it enters the combined operation mode of water and air, automatically adjusts the operation parameters of the spray pump, fan, and upper and lower louvers, and dynamically optimizes the operation state based on real-time data. When the ambient temperature is between the set anti-freezing temperature and the water cut-off temperature, it enters the water cut-off operation mode, closes the spray pump, and adjusts the fan frequency and louver opening according to the ambient temperature. When the ambient temperature is lower than the set anti-freezing temperature, it enters the anti-freezing operation mode, closes the fan and the air inlet window to avoid freezing damage to the device. When the ambient temperature is higher than the design temperature, it enters the enhanced evaporation cooling operation mode, closes the lower louver, opens the upper louver, and increases the fan frequency to enhance the cooling effect.

[0014] The beneficial effects of the present invention are: The present invention divides the operating conditions of the high-efficiency composite cooling equipment into different modes through a preset program. When the external conditions change, a programmable logic controller is used to adjust and control the operating states of the components of the high-efficiency composite cooling equipment in real time, so as to enable the high-efficiency composite cooling equipment to operate normally under the condition of no manual operation and meet the requirements, realizing intelligent operation; this control method can not only realize the selection of the intelligent operation mode of the equipment, but also realize the precise matching of the equipment output and the actual cooling demand, avoid the ineffective energy consumption of the equipment, and improve the energy utilization rate; in addition, the present invention also has functions such as evaporation water condensation recovery ability, leakage alarm, fault early warning, and operation status visualization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the system flow chart of the present invention; Figure 2 is the control method flow chart of the present invention; Figure 3 is the structural schematic diagram of the high-efficiency composite cooling equipment of the present invention.

[0016] Wherein: 1. Fan; 2. Dry air cooling unit; 3. Electric louver; 4. Water collection device; 5. Spray pipe; 6. Evaporative cooling unit; 7. Circulation water tank; 8. Water pump motor; 9. Medium export pipe; 10. Medium import pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] As shown in the figure, this embodiment is based on an intelligent control system for a high-efficiency composite cooling and condensing device. Among them, the structure of this high-efficiency composite cooling device mainly includes a housing body. Inside the housing body, a fan 1, a dry air cooling unit 2, a water collection device 4, a spray pipe 5, an evaporative cooling unit 6, and a circulation water tank 7 are sequentially arranged from top to bottom. The process medium enters the dry air cooling unit 2 from the medium import pipe 10. The dry air cooling unit 2 is interconnected with the evaporative cooling unit 6 to form a composite heat exchange channel.

[0019] The fan 1 is installed on the top of the outer casing and is used to guide the air to flow from bottom to top to achieve forced ventilation and heat exchange; the dry air-cooling unit 2 has a finned-tube structure and realizes the preliminary cooling of the working medium through air flow; the evaporative cooling unit 6 has a coil structure and is used in cooperation with the spray pipe 5 to further reduce the medium temperature by the heat absorption of water mist evaporation; the medium passes through the dry air-cooling unit 2 and the evaporative cooling unit 6 in sequence and is discharged by the medium outlet pipe 9.

[0020] The water collection device 4 is located between the dry air-cooling unit 2 and the evaporative cooling unit 6 and is used to separate the liquid water droplets in the wet air, prevent the moisture from being carried to the dry cooling section, and reduce the risks of corrosion and scaling. Two sets of electric louvers 3 are arranged on the side wall of the outer casing, the upper set is located between the dry cooling section and the water collection device 4, and the lower set is located around the evaporative cooling section and the circulation water tank 7, and are used to adjust the air flow path and the air intake volume. In cooperation with the internal fresh air channel, the cold and hot air flows can be mixed to accelerate the condensation of water mist, and the dehumidification and water-saving effects can be improved.

[0021] Among them, the spray pipe 5 is horizontally arranged, connected to the circulation water tank 7, and the spray volume is controlled by the water pump motor 8 to achieve uniform spraying of the evaporative cooling unit 6.

[0022] The intelligent control system of the above-mentioned high-efficiency composite cooling and condensing equipment includes: The fan 1 is installed at the top position of the composite cooling equipment and is used to provide air flow to achieve forced heat exchange of the equipment.

[0023] The data acquisition module is used to acquire the key parameter information during the operation of the equipment; it includes a vibration monitoring module for detecting the vibration condition of the fan 1 during operation. The vibration monitoring module is a vibration transmitter or a vibration sensor (it can also be an acceleration sensor or a displacement sensor, etc.) and is installed on the side of the fan 1 to identify potential faults; in addition, the data acquisition module also includes: The process medium flowmeter is used to monitor the flow rate of the process medium flowing inside the equipment and judge the actual cooling load. The temperature and humidity sensors are provided in multiple numbers and can be set at the positions inside the equipment, the air inlet, the air outlet, the medium outlet pipe 9, and the outer wall of the equipment, and are used to monitor the real-time temperature and humidity values inside and outside the equipment, as well as the temperature value of the process medium after cooling. The makeup water flowmeter is connected to the makeup water pipe of the equipment circulation water tank 7 and is used to monitor the flow rate of the pipeline during makeup water. The sewage flowmeter is connected to the sewage pipeline of the equipment and is used to monitor the flow rate of the pipeline during sewage discharge.

[0024] The diversion and regulation module is set at two positions, upper and lower, on the side wall of the equipment. It is used to open, close the air flow channel and adjust the air volume to adapt to the heat exchange requirements under different operating conditions. This module is an electric louver 3 or a pneumatic louver structure, which realizes angle adjustment according to the control instruction, and then flexibly changes the air volume and air flow path to adapt to the requirements of different environmental temperature, humidity and cooling load.

[0025] The spray module includes a water pump motor 8, and the water pump motor 8 is connected to the control module, and is used to control the opening and closing of the water pump motor 8 through the control module.

[0026] The control module is a programmable logic controller, which is connected to the fan 1, the diversion and regulation module, the spray module and the data acquisition module through electrical signals. It is used to receive the equipment operation parameters collected by the data acquisition module, and output control instructions based on the preset control strategy to adjust the rotation speed of the fan 1, the working speed of the water pump motor 8 and the ventilation state of the diversion and regulation module, so as to realize the precise control of the cooling air flow and flow path, and thus maintain the stable operation of the process outlet temperature of the cooling equipment. Specifically, this control module includes: The status analysis module is used to analyze the collected basic data and evaluate whether the system is in a normal operation state; The data storage module is used to store and archive the collected real-time data to support the later data retrieval and analysis; The network communication module is used to realize information transmission with the human-machine interface and the mobile terminal communication module; The cost measurement module is used to analyze and process the data collected by the data acquisition module, generate the total cost generated during the operation of the equipment, and compare it with the preset cost.

[0027] It also includes a human-machine interface, which is connected to the control module and is used to graphically display the system operation status, alarm information, historical data and energy efficiency analysis results, support the setting of operation parameters and the input of control commands, and facilitate the local management of the system operation by the operator.

[0028] It also includes a mobile terminal communication module, which is used to connect the control module with the mobile phone APP, remotely view the operation status, set operation parameters, control the start and stop of the equipment and receive alarm information through the mobile phone APP, and enhance the remote operation and maintenance ability of the system.

[0029] This application also provides a control method for the intelligent control system of the above-mentioned high-efficiency composite cooling and condensing equipment, including the following steps: Step 1: The data acquisition module collects the key parameter information during the operation of the equipment. The key parameter information includes the vibration information of the fan 1, the process medium flow information, the temperature and humidity information, the makeup water flow information and the sewage flow information, and transmits the collected information to the control module; Step 2: The control module receives the key parameter information, analyzes and judges it through the status analysis module to identify whether the current operating state of the system is normal; Step 3: Based on the preset control strategy, the control module automatically outputs control instructions to adjust the rotation speed of the fan 1 and the ventilation state of the diversion adjustment module, realizing the dynamic adjustment of the internal cooling air flow and the air flow path of the equipment, so as to maintain the process outlet temperature within the set value range.

[0030] In addition, in Step 3, the control module can also record the operation data in real time through the data storage module according to the operation data in the control process, and conduct cost accounting by the cost measurement module; The control module conducts data interaction with the human-machine interface and the mobile terminal communication module through the network communication module, enabling the operator to view the equipment operation status, set operation parameters, receive alarm information and control the equipment start and stop locally or remotely through the human-machine interface or the mobile phone APP.

[0031] When the control module identifies that the system state is abnormal or the parameters exceed the limit, it sends alarm information to the human-machine interface and the mobile terminal, and automatically executes the corresponding safety control logic, including reducing the rotation speed of the fan 1, adjusting the louver opening or stopping the spray.

[0032] In this example, the intelligent operation mode of the high-efficiency composite cooling equipment is mainly divided into four types: 1. The combined operation mode of water and air: When the ambient temperature is within the set water cut-off temperature and the design temperature range, the system automatically adjusts the equipment to enter the combined operation mode of water and air by means of the built-in program of the PLC. In this mode, the programmable logic controller (PLC) will turn on the spray water pump, the fan 1 and the upper and lower two groups of louvers of the high-efficiency composite cooling (condensing) equipment according to the preset program conditions, and adjust the opening of the two groups of louvers and the frequency of the fan 1 to ensure that the process outlet temperature value of the equipment reaches the target temperature value. At the same time, the PLC will receive and integrate the real-time data collected from each measuring point of the equipment during the operation process of the system, deeply analyze and process these data by using the built-in algorithms and models, and compare the total cost (including water consumption and energy consumption) generated during its operation process with the preset total cost. If the difference between the two is within 10%, it is considered that the operation state of the air inlet window is correct and no adjustment is required. If the difference between the two exceeds 10% or more, the two louvers need to be adjusted through the built-in program of the PLC until the target is completed. Based on the processing results, the PLC will draw the operation curve of the equipment with time as the horizontal axis and each key parameter (such as temperature, energy consumption, water consumption, total cost, etc.) as the vertical axis. After the curve drawing is completed, the PLC will transmit the operation curve data to the Internet platform and the industrial intelligent touch screen through a specific communication protocol and output interface, and present the real-time operation curve of the equipment in an intuitive and clear graphical form, providing a clear display of the equipment operation state for the operator.

[0033] 2. Water cut-off operation mode: When the ambient temperature is within the range of the set anti-freezing temperature and the water cut-off temperature, the system automatically adjusts the equipment to enter the water cut-off operation mode with the help of the built-in program of the PLC. In this mode, the programmable logic controller (PLC) will close the equipment spray water pump according to the preset program conditions, and adjust the frequency of the fan 1 and the opening degrees of the two groups of louvers according to the change of the ambient temperature to ensure that the process outlet temperature value of the equipment reaches the target temperature value. At the same time, the PLC will receive and integrate the real-time data collected from each measuring point of the equipment during the operation of the system, deeply analyze and process these data using the built-in algorithms and models, and transmit the processing results (such as temperature, energy consumption, total cost, etc.) to the Internet platform and the industrial intelligent touch screen in the form of curves.

[0034] 3. Anti-freezing operation mode: When the ambient temperature drops below the set anti-freezing temperature, the system automatically adjusts the equipment status to enter the anti-freezing operation mode with the built-in program of the PLC. In this mode, the programmable logic controller (PLC) will orderly close the adjustable components such as the running fan 1 and the air inlet window of the equipment according to the preset program conditions to block the entry of cold air from the outside, reduce the heat loss inside the equipment, ensure that the equipment can safely and stably spend the winter in the severe cold environment, avoid equipment freezing damage failures caused by low temperature, and ensure the subsequent normal operation of the equipment.

[0035] 4. Enhanced evaporative cooling operation mode: When the ambient temperature is higher than the design temperature, the system automatically adjusts the equipment status to enter the enhanced evaporative cooling operation mode with the built-in program of the PLC. In this mode, the programmable logic controller (PLC) adjusts the high-efficiency composite cooling (condensing) equipment according to the preset program conditions, closes the lower louver, adjusts the opening degree of the upper louver to the maximum, and adjusts the frequency of the fan 1 to the maximum to ensure that the process outlet temperature value of the equipment reaches the target temperature value. At the same time, the PLC will receive and integrate the real-time data collected from each measuring point of the equipment during the operation of the system, deeply analyze and process these data using the built-in algorithms and models, and transmit the processing results (such as temperature, energy consumption, water consumption, total cost, etc.) to the Internet platform and the industrial intelligent touch screen in the form of curves.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Intelligent control system of high-efficiency composite cooling and condensing equipment, characterized in that: include: A fan is installed at the top of the composite cooling device to provide airflow to achieve forced heat exchange of the device; The data acquisition module is used to collect key parameter information during the operation of the equipment; it includes a vibration monitoring module for detecting the vibration condition of the fan during operation; The flow control module is installed at the upper and lower positions of the equipment side wall to realize the opening and closing of the air flow channel and the adjustment of the air volume to adapt to the heat exchange requirements under different operating conditions; A control module, which is connected to the fan, the flow control module and the data acquisition module through electrical signals, is used to receive the equipment operation parameters collected by the data acquisition module, and output control instructions based on a preset control strategy to adjust the speed of the fan and the ventilation state of the flow control module to achieve precise control of the cooling air flow and flow path, thereby maintaining the process outlet temperature of the cooling equipment in stable operation; Human-machine interaction interface, connected to the control module, used to display the equipment operation status and realize parameter setting; The mobile terminal communication module is used to connect the control module to the mobile phone APP, and remotely view the operating status, set operating parameters, control the start and stop of the equipment, and receive alarm information through the mobile phone APP.

2. The intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 1 is characterized in that: The vibration monitoring module is a vibration transmitter or a vibration sensor, which is installed on the side of the fan.

3. The intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 1 is characterized in that: The data acquisition module also includes: Process medium flow meter, used to monitor the flow rate of process medium flowing inside the equipment; Temperature and humidity sensors, of which there are multiple, are used to monitor the real-time temperature and humidity values ​​of the internal and external environments of the equipment, as well as the temperature value of the process medium after cooling; The water supply flow meter is connected to the water supply pipe of the equipment circulating water tank to monitor the pipeline flow during water supply; The sewage flow meter is connected to the sewage pipe of the equipment to monitor the pipeline flow during the sewage discharge process.

4. The intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 1 is characterized in that: The diversion adjustment module is an electric shutter or a pneumatic shutter installed on the equipment.

5. The intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 1 is characterized in that: It also includes a spray module, which includes a water pump motor. The water pump motor is connected to the control module and is used to control the opening and closing of the water pump motor through the control module.

6. The intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 1 is characterized in that: The control module is a programmable logic controller, which includes: The status analysis module is used to analyze the collected basic data and evaluate whether the system is in normal operation; A data storage module is used to store the collected real-time data; Network communication module, used to realize information transmission with human-computer interaction interface and mobile terminal communication module; The cost metering module is used to analyze and process the data collected by the data acquisition module, generate the total cost incurred during the operation of the equipment, and compare it with the preset cost.

7. A control method for an intelligent control system of a high-efficiency composite cooling and condensing device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: The data acquisition module collects key parameter information during the operation of the equipment, wherein the key parameter information includes fan vibration information, process medium flow information, temperature and humidity information, water replenishment flow information and sewage discharge flow information, and transmits the collected information to the control module; Step 2: The control module receives the key parameter information and analyzes and determines through the status analysis module to identify whether the current operating status of the system is normal; Step 3. Based on the preset control strategy, the control module automatically outputs control instructions to adjust the speed of the fan and the ventilation state of the diversion adjustment module, thereby realizing dynamic adjustment of the cooling air flow and airflow path inside the equipment, so as to maintain the process outlet temperature within the set value range.

8. The control method of the intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 7 is characterized in that: Step three also includes: The control module records the operating data in the control process in real time through the data storage module, and the cost measurement module calculates the cost; The control module exchanges data with the human-machine interface and the mobile terminal communication module through the network communication module, so that the operator can view the equipment operation status, set operating parameters, receive alarm information and control the start and stop of the equipment locally or remotely through the human-machine interface or mobile phone APP.

9. The control method of the intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 7, characterized in that: When the control module identifies that the system status is abnormal or the parameters are out of limit, it sends an alarm message to the human-computer interaction interface and mobile terminal, and automatically executes the corresponding safety control logic, including reducing the fan speed, adjusting the shutter opening or stopping the spraying.

10. The control method of the intelligent control system of the high-efficiency composite cooling and condensing equipment according to claim 7, characterized in that: In step 3, the control module includes the following based on the preset control strategy: When the ambient temperature is between the set water-off temperature and the design temperature, the system enters the wind-water joint operation mode, automatically adjusting the operating parameters of the sprinkler pump, fan, and upper and lower blinds, and dynamically optimizing the operating status based on real-time data; When the ambient temperature is between the set antifreeze temperature and the water-off temperature, the system enters the water-off mode, turns off the sprinkler pump, and adjusts the fan frequency and shutter opening according to the ambient temperature. When the ambient temperature is lower than the set antifreeze temperature, the system enters the antifreeze operation mode, closes the fan and air inlet window to prevent equipment from freezing damage; When the ambient temperature is higher than the design temperature, the system enters the enhanced evaporative cooling operation mode, closes the lower shutters, opens the upper shutters and increases the fan frequency to enhance the cooling effect.

Images