Differential pressure valve

Details Differential pressure valve Differential pressure valve

1984-12-27

1986-06-10

Tapolcai, William E.

Refrigeration

Automatic control

Refrigeration producer

137 87, F25B 4104

Patent

active

045935351

ABSTRACT:
A pressure differential valve connected to a refrigerating circuit piping which, when a refrigerating cycle stops, blocks the high pressure coolant from diffusing into the low pressure section. Said pressure differential valve comprises a valve body having a first inlet, a first outlet, a second inlet and a second outlet; a valve disk installed in a valve chamber between the first inlet and the first outlet to open or close the passage between the first inlet and outlet, the valve disk being urged to open by a spring; a diaphragm installed between the second inlet and the second outlet to form pressure chambers; and a check valve secured to the diaphragm and communicating to both of the pressure chambers; whereby when the check valve is closed, the diaphragm causes, through a connecting rod, the valve disk to close. Said valve disk has radially projecting guide vanes attached to the axially extending portion of the seat-contacting disk to form spaces through which coolant can flow.

REFERENCES:
patent: 3855836 (1974-12-01), Takahashi et al.
patent: 3858406 (1975-01-01), Izumi
patent: 4476691 (1984-10-01), Ozu
patent: 4531378 (1985-07-01), Nishi et al.

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