Bi-directional refrigerant expansion valve

Details Bi-directional refrigerant expansion valve Bi-directional refrigerant expansion valve

1998-06-26

1999-10-19

Tapolcai, William E.

Refrigeration

Muffler or sound dampener

62511, 138 44, F25B 4106

Patent

active

059669608

ABSTRACT:
An automotive air conditioning system orifice tube type refrigerant expansion valve is axially symmetrical, so as to be error proof at installation, and/or so as to operate in a bi directional refrigerant flow. A pair of coaxial screens surrounding each end of the orifice tube, an inner noise attenuation screen of finer mesh, and an outer particulate screen of coarser mesh, provide upstream particulate exclusion and downstream noise attenuation without the potential for reverse installation. In addition, by pass ports allow for a by pass flow should the downstream inner screen become plugged.

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patent: 4793150 (1988-12-01), Wattley et al.
patent: 5036948 (1991-08-01), Henn
patent: 5893273 (1999-04-01), Casiraghi

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