Refrigerant circulation pump for air-conditioner

Details Refrigerant circulation pump for air-conditioner Refrigerant circulation pump for air-conditioner

1992-01-31

1993-07-06

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

184 616, F04B 3504

Patent

active

052248453

ABSTRACT:
A refrigerant circulation pump for circulating a liquid refrigerant through an air-conditioner has a small lubrication hole extending through a bearing by means of which a shaft for driving a compressor unit of the pump is rotatably supported. The lubrication hole communicates at one of its opposite ends with a compression chamber of the compressor unit, the other of the opposite ends communicating with a friction point between the shaft and the bearing. While the pump is operating, a part of the liquid refrigerant is fed under pressure from the compression chamber to the friction point between the shaft and the bearing, thereby lubricating the friction point. With this lubrication, the pump is able to operate reliably for a prolonged period of time without causing wear of the shaft and the bearing.

REFERENCES:
patent: 2031080 (1936-02-01), Deventer
patent: 3521978 (1970-07-01), Enemark
patent: 3565553 (1971-02-01), Rinehart et al.
patent: 5060759 (1991-10-01), Dussaurd et al.

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