Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1982-03-05
1984-02-14
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
417295, 417302, 417440, 417902, F04C 1802, F04C 2908, F04B 4902
Patent
active
044313888
ABSTRACT:
Apparatus for unloading a scroll compressor to modulate its capacity by separately controlling fluid flow into first and second inlets. The first and second inlets are disposed diametrically opposite each other in a fixed scroll plate, and are enclosed by a perimeter wrap which extends from the radially outer end of the fixed spiral shaped wrap element. A compliant sealing member is provided between the inner surface of the perimeter wrap and the outer flank surface of the orbiting scroll wrap to interrupt fluid flow between the two inlets through this area. Valves connected to the first and second inlets selectively control the flow of suction fluid into fluid pockets being formed between the radially outer ends of the orbiting and fixed wrap elements to unload the compressor over an extended range of its rated output capacity.
REFERENCES:
patent: 4383805 (1983-05-01), Teegarden et al.
Eber David H.
Utter Robert E.
Anderson Ronald M.
Campbell Raymond W.
Lewis Carl M.
The Trane Company
Vrablik John J.
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