Refrigeration – Refrigeration producer – With lubricant handling means
Patent
1994-02-14
1996-09-24
Bennett, Henry A.
Refrigeration
Refrigeration producer
With lubricant handling means
62114, 252 68, C10M10700
Patent
active
055579442
ABSTRACT:
A lubricant for a refrigerating unit uses a hydrofluorocarbon system refrigerant with a polyol ester system oil as its base oil. The purity of hydrofluorocarbon system refrigerant is set to a level higher than 99.95 wt % and the mixing of chlorine impurity in the system refrigerant is set at a level lower than 80 ppm. The performance and reliability of a refrigerating unit using the hydrofluorocarbon system refrigerant, such as R134a, can be enhanced by making the polyol ester system oil of a chemical compound having particular physical properties, by suppressing the equilibrium water content of refrigeration cycle and by limiting the residual volume.
REFERENCES:
patent: 4851144 (1989-07-01), McGraw et al.
patent: 5021179 (1991-06-01), Zehler eta l.
patent: 5185092 (1993-02-01), Fukuda et al.
patent: 5202044 (1993-04-01), Hagihara et al.
patent: 5342533 (1994-08-01), Kondo et al.
Akazawa Kiyoshi
Hirano Yutaka
Jikuhara Seiki
Komatubara Takeo
Sunaga Takashi
Bennett Henry A.
Doerrler William C.
Sanyo Electric Co,. Ltd.
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