Oil separator for conditioning recovered refrigerant
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United States of America Patent
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-
Jan 3, 1995
Grant Date -
N/A
app pub date -
Nov 20, 1992
filing date -
May 25, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A refrigerant filter/accumulator and an oil separator, both suitable for refrigerant recovery equipment, are disclosed. In the filter/accumulator (10) refrigerant enters (11), is filtered by cup-shaped filter (15), and liquid-refrigerant drains into accumulator section (20). Superheated refrigerant from compressor (17) passes through pipe (21, 22, 23) and vaporises refrigerant which leaves the unit via outlet (26). Accumulated oil can be drained when desired via oil port (35). In another embodiment refrigerant enters section (20) and passes upwardly through a coarse filter and baffle [both depending from ledge (30)] before encountering filter (15) and exiting from the upper section of the unit. In the oil separator (not shown) superheated refrigerant enters a vessel at a lowpoint and must flow up in a tortuous path through a mesh, thus prompting settlement of oil. The settled oil exits through a continuously open, flow restricted line which returns it to upstream of the compressor, thus enabling pressure equalisation across the compressor after shutdown.
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