Refrigerant filtation system with filter change indication

Details Refrigerant filtation system with filter change indication Refrigerant filtation system with filter change indication

1994-03-07

1995-05-23

Sollecito, John M.

Refrigeration

Processes

Separating or preventing formation of undesirables

62195, F25B 4700

Patent

active

054170753

ABSTRACT:
Apparatus for purification of refrigerant that includes a replaceable filter/dryer unit for removing water from refrigerant passing therethrough and having a predetermined water absorption capacity, and a compressor for pumping refrigerant through the filter/dryer unit. Refrigerant vapor pressure is measured at the compressor inlet, and mass flow rate of water in the refrigerant pumped through the filter/dryer unit is determined as a function of measured pressure. The mass flow rate of water so determined is monitored over time of operation of the refrigerant pump to determine when the mass of water in refrigerant pumped through the filter/dryer unit reaches the predetermined water absorption capacity of the unit. Filter status may be indicated to an operator and/or operation of the pump may be terminated.

REFERENCES:
patent: 4805416 (1989-02-01), Manz et al.
patent: 4939905 (1990-07-01), Manz
patent: 5211024 (1993-05-01), Manz et al.
patent: 5231841 (1993-08-01), McClelland et al.

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