F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
62/29
F25B 43/02 (2006.01) F25B 31/00 (2006.01)
Patent
CA 1205645
ABSTRACT OF THE DISCLOSURE In the operation of a refrigeration system compris- ing a compressor, a condensor, an expansion valve and an evaporator which form a circulation circuit containing NH3 refrigerant as a first medium, the compressor being lubri- cated by a second medium, oil, part of the oil quantity be- ing continuously discharged from the compressor together with compressed NH3-gas into the circulation circuit for recircu- lation of oil to the compressor, continuously or batchwise, from the low pressure region of the circulation circuit, that is, the region located between the expansion valve and the compressor, the part of the oil transferred to the low pressure region of the circulation cir- cuit is contacted with a third medium, added to the circula- tion circuit and which is substantially insoluble in liquid NH3, to form a liquid phase which is relatively free-flowing at the temperature prevailing in the low pressure region of the circulation circuit, whereupon said liquid phase, possibly after separation from any excess third medium, is fed to the compressor
417553
Marks & Clerk
Stal Refrigeration Ab
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