公开(公告)号：US6442980B2

公开(公告)日：2002-09-03

申请号：US83516801

申请日：2001-04-13

Applicant: CHART INC

Inventor： PRESTON A DUANE ,  TURNER JON R ,  SVOBODA CHARLES

IPC: D06F43/00 ,  D06F43/08 ,  F17C7/02 ,  B08B3/10

CPC classification number: D06F43/007 ,  D06F43/00 ,  D06F43/02 ,  D06F43/08 ,  D06F43/081 ,  F17C7/02 ,  F17C2205/013 ,  F17C2205/0146 ,  F17C2205/0326 ,  F17C2205/035 ,  F17C2221/013 ,  F17C2223/0153 ,  F17C2223/035 ,  F17C2227/0135 ,  F17C2227/0304 ,  F17C2227/0346 ,  F17C2227/0355 ,  F17C2227/0393 ,  F17C2250/032 ,  F17C2250/0408 ,  F17C2250/043 ,  F17C2250/0434 ,  F17C2250/0439 ,  F17C2250/0452 ,  F17C2250/0491 ,  F17C2250/0631 ,  F17C2260/032 ,  F17C2260/038 ,  F17C2260/044 ,  F17C2270/0545

Abstract: A carbon dioxide dry cleaning system features a pair of liquid carbon dioxide storage tanks in communication with a compressor. A sealed cleaning chamber contains the objects to be cleaned. By selectively pressurizing the storage tanks with the compressor, liquid carbon dioxide is made to flow to the cleaning chamber through cleaning nozzles so as to provide agitation of the objects being dry cleaned. Liquid carbon dioxide displaced from the cleaning chamber returns to the storage tanks. In an alternative embodiment, a single storage tank is pressurized via a compressor with gas from the cleaning chamber so that liquid solvent from the storage tank travels to the cleaning chamber through nozzles. The objects in the cleaning chamber are agitated by a rotating basket. After a prewash cycle, liquid solvent from the cleaning chamber is directed to a still. The liquid solvent in the still is boiled through a connection with the head space of the cleaning chamber. The still may be positioned within the storage tank and partially surrounded with a shroud for efficient heating of the still with gas from the cleaning chamber. During agitation, liquid solvent from the cleaning chamber may be heated and filtered.