Refrigeration – Processes – Assembling – charging – or repairing of refrigeration producer
Patent
1995-06-07
1996-08-27
Sollecito, John M.
Refrigeration
Processes
Assembling, charging, or repairing of refrigeration producer
62149, 62292, F25B 4500
Patent
active
055489664
ABSTRACT:
Two preferred embodiments of an improved refrigerant recovery system and method for recovering refrigerant from a separate system are disclosed whereby the first embodiment utilizes a closed-loop refrigeration system employing a portable storage tank to recover refrigerant from a separate system that needs to be serviced. The first embodiment recovers refrigerant from the separate system by placing a storage tank within an evaporator that is cooled by evaporator coils and evacuated by a vacuum pump. The vacuum pump is valved off and recovered refrigerant is directed to the storage tank from the separate system. None of the recovered refrigerant contacts the compressor of the recovery system and vacuum pump. An alternative to the first embodiment provides a booster pump in-line with the storage tank and the separate system for transferring any residual refrigerants into the storage tank. The second preferred embodiment includes a portable storage tank located within an insulation device and a number of other conventional components including a compressor, condenser, valves and an expansion device. This system employs two phases whereby during phase 1 primarily liquid refrigerant is directed to the storage tank which enhances the life of the compressor because contaminated liquid refrigerants are not subjected to the compressor. Once all of the liquid has been recovered from the separate system and a predetermined pressure is reached in the storage tank, phase 2 is activated whereby primarily recovered gas is directed through the compressor and eventually dumped into the cooled storage tank. Because of this unique arrangement, refrigerants can be recovered from separate systems at much faster rates then conventional refrigerant recovery systems. An alternative to this second embodiment provides a unique fluid sensor which improves the efficiency of the recovery system by automatically activating phase 2 when all of the liquid refrigerant has been recovered from the separate system and when the storage tank is at a predetermined pressure.
REFERENCES:
patent: 2246875 (1941-06-01), Carney
patent: 4249387 (1981-02-01), Crowley
patent: 4476688 (1984-10-01), Goddard
patent: 4539817 (1985-09-01), Staggs et al.
patent: 4766733 (1988-08-01), Scuderi
patent: 4776174 (1988-10-01), Rich et al.
patent: 4805416 (1989-02-01), Manz et al.
patent: 4809515 (1989-03-01), Houwink
patent: 4903499 (1990-02-01), Merritt
patent: 4981020 (1991-01-01), Scuderi
patent: 4998413 (1991-03-01), Sato et al.
patent: 5077984 (1992-01-01), Vance
patent: 5090211 (1992-02-01), Peters
patent: 5123259 (1992-06-01), Morgan, Sr.
patent: 5127232 (1992-07-01), Paige et al.
patent: 5189881 (1993-03-01), Miles
patent: 5201188 (1993-04-01), Sakuma
patent: 5233840 (1993-08-01), Scaringe
Copeland Corporation
Sollecito John M.
LandOfFree
Refrigerant recovery system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Refrigerant recovery system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refrigerant recovery system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1048891