Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1992-07-31
1993-10-12
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 556, 418 57, 418 94, 418100, F04C 1804, F04C 2902
Patent
active
052520463
ABSTRACT:
A scroll type compressor comprising a housing inside which a stationary scroll member and a frame are fixed to define a space therebetween large enough to receive therein an orbiting scroll member which inter-engages with the stationary scroll member to define therebetween a hermetical compression pocket into which the fluid to be compressed fills. An Oldham-coupling ring restricts the orbiting scroll member to orbit around the center of the stationary scroll wrap only. A back pressure chamber is in pressure connection with the compressed fluid through a lubricant for the compressor and also in fluid connection with an inlet of the fluid to be compressed through a capillary-like passage. A slot with a cross-sectional dimension larger than the capillary-like passage is connected between the capillary-like passage and the back pressure chamber and is so constructed that when the orbiting scroll member orbits, the slot is cyclically and repeated closed and re-opened by the orbiting scroll to establish a dynamic fluid resistance which, together with a static fluid resistance caused by the capillary-like passage, serve to maintain the back pressure at an approximately constant level for acting upon and thus forcing the orbiting scroll member toward the stationary scroll member.
Bao-Yuang Lin
Chih-Cheng Yang
Da-Chuan Liu
Guang-Der Tarng
Jan-Shiew Ho
Industrial Technology Research Institute
Vrablik John J.
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