Controlled suction unloading in a scroll compressor

Details Controlled suction unloading in a scroll compressor Controlled suction unloading in a scroll compressor

F - Mech Eng,Light,Heat,Weapons

04

D

230/31, 230/37

F04D 27/02 (2006.01) F04C 18/02 (2006.01) F04C 23/00 (2006.01)

Patent

CA 1233144

Title CONTROLLED SUCTION UNLOADING IN A SCROLL COMPRESSOR Inventors David H. Eber Robert E. Utter 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 pro- vided 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 com- pressor over an extended range of its rated output capacity.

422764

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