Scroll compressor having a gradually changing tip clearance

Details Scroll compressor having a gradually changing tip clearance Scroll compressor having a gradually changing tip clearance

2011-05-31

2011-05-31

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

C418S055400, C418S142000

Reexamination Certificate

active

07950912

ABSTRACT:
A scroll compressor performing three-dimensional compressions, which can optimize a tip clearance in operation while considering a thermal expansion and a pressure deformation and which can reduce a compression leakage to improve a compression efficiency thereby to realize a high performance. The leading end faces (13cand13d) and the bottom face of a spiral wrap (13b) have a step portion (13e), and the wrap height on the outer circumference side of the spiral wrap (13b) is made larger than that on the inner circumference side wrap height. The spiral wrap (13b) on the inner circumference side with respect to the step portion (13e) is stepwise or continuously made gradually lower toward the center side of the spiral wrap (13b), and the tip clearance (Δi) of the spiral wrap on the inner circumference side with respect to the step portion (13) is made gradually larger toward the center side of the spiral wrap (13b).

REFERENCES:
patent: 6659745 (2003-12-01), Fujita et al.
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patent: 2003-35285 (2003-02-01), None
patent: 2006-342776 (2006-12-01), None
International Search Report of PCT/JP2007/075211, date of mailing date Feb. 12, 2008.

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