Orifice tube type refrigerant expansion valve assembly with comb

Details Orifice tube type refrigerant expansion valve assembly with comb Orifice tube type refrigerant expansion valve assembly with comb

1997-09-10

1999-05-25

Ferensic, Denise L.

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

138 42, 138 44, F15D 102

Patent

active

059062258

ABSTRACT:
An orifice tube refrigerant expansion valve has an upstream particulate filter of novel design and a downstream expansion noise attenuation filter with a fail safe flow provision. The upstream particulate filter is a truncated cone of porous filter material that forms a thin manifold space inside the refrigerant line, forcing refrigerant flow into a small central bore of the filter and concentrically into the orifice tube. Leaving the orifice tube, the flow is forced axially end to end through a cylindrical body of noise muffling, porous material. Should the noise muffling cylinder become blocked, it shifts piston-like to open a bypass passage around its outer surface so that flow is not blocked through the line.

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patent: 5036948 (1991-08-01), Henn
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