Patent ID: 6189326
Filing Date: 2001-02-20
Classification: F25B

Abstract:
A pressure control valve for a vapor compression type refrigeration cycle having a radiator for radiating heat of compressed refrigerant, an evaporator for evaporating refrigerant and a heat exchanger for performing heat exchange between the refrigerant at an outlet side of said evaporator and the refrigerant at an outlet side of said radiator, said pressure control valve being located between the outlet side of said radiator and an inlet side of said evaporator, said pressure control valve comprising:a temperature sensing portion for changing its internal pressure according to a refrigerant temperature at the outlet side of said radiator;a valve port for being controlled according to the refrigerant temperature at the outlet side of said radiator to control a refrigerant pressure at the outlet side of said radiator;a control valve main body having said temperature sensing portion for adjusting an opening degree of said valve port by mechanically interlocking with said internal pressure change of said temperature sensing portion;a casing for accommodating said control valve main body;a temperature sensing chamber formed in said casing for accommodating said temperature sensing portion and for communicating with an inlet side of said heat exchanger; anda pressure introduction passage formed in said casing for introducing a refrigerant from said heat exchanger to an upstream side of said valve port in a refrigerant flowing direction.