Compressor with liquid injection

摘要

A refrigeration system incorporating a scroll type compressor is disclosed which includes an injection system for injecting liquid refrigerant into the suction inlet opening of the compressor in response to excessive discharge gas temperature. A temperature sensor assembly is located within a well formed in the discharge chamber and serves to control actuation of the liquid injection system. In one embodiment the sensor assembly incorporates a pair of thermostats, one to control liquid injection and one to shut down the compressor in the event of continued overheating. In another embodiment a single thermostat having two tip temperatures is utilized. In a third embodiment a temperature sensing transducer is utilized in combination with a microprocessor.