Patent ID: 6012300
Filing Date: 2000-01-11
Classification: F25B,G05D

Abstract:
A pressure control valve applied to a vapor compression type refrigerating system wherein pressure in a heat emitter (2) exceeds a critical pressure of a refrigerant,arranged in a refrigerant flow path (6a) from said heat emitter (2) to an evaporator (4), andcontrolling an outlet side pressure of said heat emitter (2) in accordance with a refrigerant temperature on the outlet side of said heat emitter (2), comprising:a partition wall (302) which is formed in said refrigerant flow path (6a) and partitions said refrigerant flow path (6a) into an upstream space (301e) and a downstream space (301f);a valve port (303) which is formed in said partition wall (302) and communicates said upstream space (301e) and said downstream space (301f);a formation member (307) provided in said upstream space (301e);a thin film-like displacement member (306) which together with said formation member (307) forms a closed space (305) into which the refrigerant is sealed and displaces in accordance with a pressure difference between an inside and an outside of said closed space (305);a valve element (304) which displaces linked with said displacement member (306) and opens or closes said valve port (303); anda through member (313) penetrating through said formation member (307) between the inside and outside of said closed space (305) and made of a material having a larger heat conductivity than that of said formation member (307).