Refrigeration – Processes – Assembling – charging – or repairing of refrigeration producer
Patent
1994-03-14
1995-03-28
Sollecito, John M.
Refrigeration
Processes
Assembling, charging, or repairing of refrigeration producer
62149, 62292, F25B 4500
Patent
active
054006066
ABSTRACT:
An apparatus for recovering refrigerant has an inlet port connected to a refrigeration system from which compressible refrigeration fluid is to be recovered. The inlet port of the apparatus is connected to an inlet port of a first discriminator chamber. An outlet port of the first discriminator chamber is connected to first and second solenoid valves. The first solenoid valve is connected to a compressor. The compressor is connected to a condenser. The condenser is connected to a strainer for removing particulate from the refrigerant, which is connected to a capillary tube. The capillary tube generates a required back pressure in the system and is connected to a discharge port of the apparatus. The compressor, condenser and capillary tube collectively provide for condensing gas phase refrigerant fluid to a low pressure stream of substantially liquid phase refrigerant fluid. A capillary tube bypass is provided when excess pressure is sensed at the compressor. The discharge port of the apparatus is connected to a liquid inlet valve of a dual port refrigerant recovery valve on a refrigerant recovery tank. A gas outlet valve of the dual port refrigerant recovery valve is connected an inlet or suction port of the apparatus. The suction port is connected to an inlet port of a second discriminator chamber. The second discriminator chamber has an outlet port which is connected to a third solenoid valve. The third solenoid valve is connected to the compressor. The first and second discriminator chambers each include a sensor, which is responsive to the level of liquid phase refrigerant fluid in the corresponding discriminator chamber and provides a control signal when the discriminator chamber is full of liquid phase refrigerant fluid.
REFERENCES:
patent: 4766733 (1988-08-01), Scuderi
patent: 4981020 (1991-01-01), Scuderi
patent: 5203177 (1993-04-01), Manz et al.
patent: 5209077 (1993-05-01), Manz et al.
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