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The control system of the refrigeration equipment is generally composed of a touch screen and a PLC. The actuator includes a compressor, a condenser, a liquid supply valve, an oil condenser, and an oil bypass valve. PLC collects temperature and current signals to control the compressor, condenser, liquid supply valve, oil condenser, and oil bypass valve accordingly.
When the low-pressure pressure collected by the system is greater than the upper limit set by the touch screen, the compressor will load according to the set loading time, and lower than the lower limit will reduce the load;
The collected high-pressure pressure is greater than the upper limit, the condenser will load according to the set loading time, and the lower pressure will reduce the load according to the set load-reduction time;
The cold storage valve will start automatically when it reaches the set cold storage start temperature;
The system will automatically stop working when there are current and oil flow alarms.
Advantages of system solutions
MC100 series analog channels easily realize 4-20mA current acquisition
MC100 series temperature acquisition channel easily realizes PT100 temperature acquisition