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Control Cabinet Used For Cooling Fan

Thermostatic control project for cooling fans
1. Current situation:
At present, most manufacturers of cooling fans carry out with direct start or Y-△ start according to high and low temperature spot. Its shortcoming is energy-intensive and noise uncontrollable. In addition, there is huge shock when starting.
2. Advantage of using thermostatic control system:
The frequency converter guarantees the constant temperature of inlet water. When the inlet water temperature is high, the frequency converter will control the fan to rotate in high speed for heat rejection. When the inlet water temperature is low, the frequency converter will control the fan to rotate in low speed for constant temperature purpose.
The frequency converter guarantees the fan work in the best condition, so it is energy saving. (Generally, 20%-70%) Meanwhile, the noise will be down in low speed. In addition, the soft starting and soft stop of frequency converter ensures the reducing of mechanical shock.

3. Detailed program as below:
(1).Temperature transmitter measures the inlet water temperature and send to temperature controller. The temperature controller calculates and transfers the temperature signal to the PLC.
(2). As the MPU, the PLC converts the needed air flow and pressure according to temperature signal.PLC controls the frequency converter and adjusts the fan speed to change the air flow and pressure.
Notes: HMI is the communication media between PLC and human being. It gives orders such as starting, stop, speed display of fan, noise display and temperature display.

4.Schematic diagram:

Notes: For special ordering requirements, please show clearly. We can design accordingly.

 

Zhejiang Mingxin Fans Co.,Ltd is a China control cabinet used for cooling fan manufacturer and supplier, with our own control cabinet used for cooling fan factory, we provide you with cheap control cabinet used for cooling fan products and good discount. Welcome to buy control cabinet used for cooling fan products from us in wholesale business.

 

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