Electrically-driven closed scroll compressor having means for mi

Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll

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Details

418 554, 418 555, 418 57, F04C 1804, F04C 2700

Patent

active

058001492

ABSTRACT:
An electrically-driven closed scroll compressor has a compression mechanism accommodated in a closed vessel. The compression mechanism includes a bearing member securely mounted in the closed vessel, a stationary scroll having a stationary scroll wrap formed thereon, an orbiting scroll having an orbiting end plate and an orbiting scroll wrap formed on the orbiting end plate so as to engage with the stationary scroll wrap to define a plurality of working pockets therebetween, and an eccentric bearing for allowing the orbiting scroll to undergo an orbiting motion relative to the stationary scroll. A generally ring-shaped sealing member is mounted on the bearing member so as to be held in contact with the orbiting end plate. The sealing member may be mounted on the orbiting end plate. The orbiting end plate has first and second regions defined therein internally and externally of the sealing member, respectively, so that the first and second regions may receive first and second pressures, respectively, both forming a first thrust force. The sealing member has a center positioned so that during the orbiting motion of the orbiting scroll, when a second thrust force applied to the orbiting scroll from the working pockets takes a substantially maximum value, a distance between a central point of application of the first thrust force and a central point of application of the second thrust force takes a substantially minimum value.

REFERENCES:
patent: 4522575 (1985-06-01), Tischer et al.
patent: 4992032 (1991-02-01), Barito et al.
patent: 5085565 (1992-02-01), Barito
patent: 5090878 (1992-02-01), Haller

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