Refrigerant recovery system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 2, 1999
Issued Date -
N/A
app pub date -
Mar 23, 1995
filing date -
May 3, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A refrigerant recovery system and method for recovering refrigerant from a separate refrigeration system are disclosed which first employs a liquid recovery phase and then a subsequent vapor recovery phase. A liquid sensor monitors the incoming recovered refrigerant and produces a signal indicative of when all of the liquid refrigerant has been recovered from the separate refrigeration system. The timer relay continues the liquid refrigerant recovery phase of operation for an additional predetermined time period once the signal is sensed. Thereafter, the recovery system switches to the vapor recovery phase of operation for yet an additional time period. The system then switches between these two phases until a predetermined condition occurs. An alternative refrigeration system is ambient temperature sensitive for controlling the recovery modes of operation. A thermistor is electronically connected to the timer relay which in turn produces a delayed signal that is indicative of the sensed ambient temperature. Based upon the sensed temperature, the timer relay sequences the system between the two different modes of recovery and adjusts the time periods for operating each mode.
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