Expansion valve and refrigerating system

Details Expansion valve and refrigerating system Expansion valve and refrigerating system

1996-05-22

1999-04-27

Chambers, A. Michael

Valves and valve actuation

Valve

Seats

251359, F16K 3100

Patent

active

058970991

ABSTRACT:
An expansion valve comprises an orifice 30 formed in a valve body 10 and a valve member 9 fixed to a movable member 18. Movement of a diaphragm 4 is transmitted to an actuating rod 17 via a member 16, and the actuating rod 17 actuates the movable member 18 to control the opening rate of the path between the valve member 9 and the orifice 30. A seat nut member 100 affixed to the orifice 30 has a large-diameter hole 108 and a small-diameter hole 110 directly communicating with each other. Hot pressurized refrigerant introduced into the large-diameter hole 108 heats a seat portion at the exit of the large-diameter hole, and prevents moisture in the refrigerant from freezing there.

REFERENCES:
patent: 1512243 (1924-10-01), Shrode
patent: 1987948 (1935-01-01), Smith
patent: 2306768 (1942-12-01), Wile
patent: 2598187 (1952-05-01), Meyer
patent: 2631612 (1953-03-01), Buescher
patent: 4542879 (1985-09-01), Stein
patent: 4815698 (1989-03-01), Palmer
patent: 4834337 (1989-05-01), Chorkey et al.

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