压力开关

In the refrigeration system, the controller's high-pressure side (or a single high-pressure) and the ,When the compressor discharge pressure than high-voltage set-point controller, the controller micro-switch high-voltage side of the contact disconnected, cut off the circuit, compressor stop. the controller low-voltage side of the micro-switch contacts break, cutting off electrical appliances, compressors parking. Above the contrary, that the compressor discharge pressure gradually decreased to control high-pressure set point lower limit, or compressor suction pressure gradually rose to controller, the upper limit of low pressure set point, the controller micro-switch contacts closed, then pass circuit, the compressor to start running again. low pressure protection, cooling and chillers for cold storage of great significance to the reasonable functioning