Patent ID: 6615598
Filing Date: 2003-09-09
Classification: F04C,F25B

Abstract:
A compressor assembly comprising:a shell defining a suction inlet and a discharge outlet; a compressor disposed within said shell for receiving a fluid from said suction inlet and compressing said fluid from a suction pressure to a discharge pressure; a refrigeration circuit extending between said discharge outlet and said suction inlet, said refrigeration circuit including a suction fluid line in communication with said suction inlet; a liquid injection circuit extending between an attachment point in said refrigeration circuit and said suction fluid line for injecting liquid refrigerant into said suction fluid line; a temperature sensor for monitoring a temperature of gas supplied to said discharge outlet at said discharge pressure; a controllable valve for controlling flow of said liquid refrigerant to said suction fluid line, and an electronic control in communication with said temperature sensor and said controllable valve, said electronic control controlling said controllable valve by pulse width modulation based on a temperature reading of said temperature sensor.