Expansion and check valve combination

Details Expansion and check valve combination Expansion and check valve combination

1987-10-23

1989-08-01

King, Lloyd L.

Refrigeration

Automatic control

Refrigeration producer

623241, 62528, 251282, F25B 4104

Patent

active

048523640

ABSTRACT:
This expansion valve includes a valve body providing an inlet chamber and an outlet chamber separated by a compound valve. The compound valve includes a check valve seat defining a valve port receiving a check valve element and the check valve element includes a control valve port receiving a control valve element. During normal refrigerant flow conditions when the pressure in the inlet chamber is greater than the pressure in the outlet chamber, the check valve remains seated while the control valve element meters refrigerant flow between the two chambers. During reverse refrigerant flow, when the pressure in the inlet chamber is less than the pressure in the outlet chamber, the check valve is urged away from the check valve seat to provide for relatively unrestricted refrigerant flow between the two chambers.

REFERENCES:
patent: 2786336 (1957-03-01), Lange
patent: 3699778 (1972-10-01), Orth
patent: 3738573 (1973-06-01), Eschbaugh
patent: 3742722 (1973-07-01), Leimbach
patent: 4095742 (1978-06-01), Schumacher
patent: 4106691 (1978-08-01), Nielsen
patent: 4606199 (1986-08-01), Gotzenberger

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