Refrigeration compressor high and low pressure switch on the high and low voltage, respectively, what ah, high and low pressure switch value is how to calculate the ah
Gas compression refrigeration system in the work, from the compressor exhaust --- condenser --- expansion valve (capillary) inlet is part of the high pressure. From the expansion valve outlet --- evaporator --- compressor suction port is part of the low pressure. The high pressure pipe of the pressure controller is connected with the exhaust port of the compressor; the low pressure pipe is connected with the suction port of the compressor. Two tubes are distributed to drive the pressure sensor (diaphragm or bellows) to push the switch that is the high voltage switch and the low voltage switch. These two switches are designed to protect the refrigeration system, high voltage switch to prevent system overload, low voltage switch to prevent the system leak or block, the two switches as long as an action, will stop the protection machine to prevent further damage to the system.
Low-voltage switch room installed in the compressor on the return pipe, when the pressure is too low when the switch protection action, and high-pressure switch room installed in the exhaust pipe, when the high pressure is too high when the switch action. In order to protect the press and the safety of the system.
The setting value of the high and low voltage switch is determined according to the pressure enthalpy curve of the refrigerant (12,22,502,134a) used in the system and the condensing pressure and the evaporation pressure designed by the system. The same refrigerant is cooled by the cooling method Cold, water-cooled) and the condensation pressure is different.
