How does the purification hot air circulation oven work?

The temperature control of the cabinet adopts GCD-23A intelligent computer temperature control and PLC automatic control system. The temperature signal is collected by platinum resistance. The temperature controller is compared with the set value to obtain the PID control signal. At the same time, the PLC program controller is used. The output control signal controls the solid state relay SSR to be turned on, and the solid state relay controls the heater to heat, so that the cabinet is in the temperature rising and dehumidifying stage. When the temperature reaches the set value, the temperature controller outputs the PID control signal PLC, and the PLC outputs a control signal to the time relay KT to start the heat preservation timing, and at the same time, close the inlet fan and the exhaust disc valve. The electric heating is continuously opened and closed by PID control, and the box body is in the hot air circulation heat preservation and sterilization stage. When the heat preservation sterilization time reaches the set value, the time relay outputs a signal to the PLC, and the PLC outputs the full closed electric heating, and the water cooling electromagnetic valve is opened to make the suction and conduction, so that the box is in the cooling and cooling stage. When the temperature inside the box drops ≤40 °C, the temperature controller outputs a control signal to the PLC, and the PLC output turns off the hot air circulation fan, and the dry sterilization cycle program ends. TEED-2001 K over-temperature alarm temperature controller output signal controls PLC's entire program operation, platinum resistance PT 100 test signal to alarm temperature controller and over-temperature alarm set temperature value, when the actual temperature value is lower than the set value , output control signal to PLC, PLC program runs normally. When the actual temperature value exceeds the set value, the control signal is output to the PLC, and the PLC closes the running program. Therefore, the setting value of the over temperature alarm is generally higher than the set value of the working temperature.

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