Title:
REFRIGERATOR OIL, HYDRAULIC FLUID FOR REFRIGERATOR, AND METHOD FOR LUBRICATING REFRIGERATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/1998/011182
Kind Code:
A1
Abstract:
A refrigerator oil which can inhibit precipitation attributable to a working oil remaining in a refrigeration system, a hydraulic fluid for a refrigerator, and a method for lubricating a refrigeration system. The refrigerator oil comprises a polyhydric alcohol ester compound as a lube base oil and 0.5 to 4.5 % by weight of at least one polyoxyalkylene compound. The hydraulic fluid comprises the refrigerator oil and a hydrofluorocarbon coolant. The lubrication method comprises using the above hydraulic fluid in the lubrication of a refrigeration system wherein a metal working oil containing a component sparingly soluble in a polyhydric alcohol ester compound or a hydrofluorocarbon coolant, or a metal working oil containing a component having a high reactivity with a polyhydric alcohol ester compound or a hydrofluorocarbon coolant. The precipitation in a refrigeration system, particularly in the tubing in the system, can be inhibited.
Inventors:
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
TAKAHASHI HITOSHI (JP)
Application Number:
PCT/JP1997/003160
Publication Date:
March 19, 1998
Filing Date:
September 08, 1997
Export Citation:
Assignee:
JAPAN ENERGY CORP (JP)
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
KAIMAI TAKASHI (JP)
TAKAHASHI HITOSHI (JP)
International Classes:
C10M169/04; C10M171/00; (IPC1-7): C10M169/04; C10M105/38; C10M129/16; C10M145/36
Foreign References:
| JPH02158693A | 1990-06-19 | |||
| JPH0532985A | 1993-02-09 |
Other References:
See also references of EP 0881278A4
Attorney, Agent or Firm:
Komatsu, Hideoka (13-5 Akasaka 4-chom, Minato-ku Tokyo 107, JP)
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