Scroll compressor with enlarged vapor injection port area

Details Scroll compressor with enlarged vapor injection port area Scroll compressor with enlarged vapor injection port area

2007-10-09

2007-10-09

Trieu, Theresa (Department: 3748)

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

C417S440000, C418S015000, C418S055100, C418S055500, C418S057000

Reexamination Certificate

active

10752757

ABSTRACT:
Scroll compressors are provided with vapor injection or by-pass ports that will allow greater flow of refrigerant through the port than was the case in the prior art. The prior art has typically utilized a single injection port having a diameter equal to or slightly larger than the thickness of the scroll wrap. In this way, the scroll wrap is able to prevent or restrict cross-flow leakage from the port from passing between the two compression chambers. However, this single port has also limited the amount of refrigerant that can be returned. In one embodiment, the present invention utilizes a plurality of ports generally spaced along the length of the wrap such that cross-flow can still be prevented while providing a greater cross-sectional flow area into or out of the compression chambers. In another embodiment, the several ports may be replaced by a single elongated port. Further, if cross-flow leakage is not a particular problem, the ports may be positioned such that they begin to communicate, and stop communicating, serially, with the two chambers.

REFERENCES:
patent: 5103652 (1992-04-01), Mizuno et al.
patent: 5855475 (1999-01-01), Fujio et al.
patent: 5996364 (1999-12-01), Lifson et al.
patent: 6042344 (2000-03-01), Lifson
patent: 6142753 (2000-11-01), Bush et al.
patent: 6619936 (2003-09-01), Perevozchikov
patent: 7100386 (2006-09-01), Lifson
patent: 03081588 (1991-04-01), None
patent: 2000161263 (2000-06-01), None

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