Patent ID: 6457948
Filing Date: 2002-10-01
Classification: F04C,F25B

Abstract:
A capacity modulation system for a scroll compressor comprising:a first scroll member having a first end plate and a first spiral wrap upstanding therefrom; a second scroll member having a second end plate and a second spiral wrap upstanding therefrom, said first and second spiral wraps being interleaved to define at least one moving fluid pocket which decreases in size as it moves from a radially outer position to a radially inner position; a suction pressure zone in communication with said radially outer position; a discharge pressure zone in communication with said radially inner position; a fluid chamber defined by a component of said scroll compressor, said fluid chamber being operable to receive a pressurized fluid for exerting a load on said first scroll member; means for supplying said pressurized fluid to said fluid chamber; a first fluid passage extending between said fluid chamber and said suction pressure zone; a valve member disposed within said first fluid passage, said valve member operable to open and close said first fluid passage; and a first temperature sensor for sensing a first fluid temperature within said first fluid passage and operatively connected to said valve member for determining an operational status.