Cleaning and liquid contact with solids – Apparatus – Automatic controls
Patent
1997-05-12
1999-02-02
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
Automatic controls
134 58R, 134105, 134108, B08B 310
Patent
active
058651985
ABSTRACT:
A refrigerated vapor degreasing system for cleaning workpieces. The system has a tank for containing a bath of degreasing solvent, a heater for vaporizing the solvent, a primary solvent condenser, a secondary solvent condenser, and a single refrigeration unit which can be switched to operate in two different modes. The primary solvent condenser creates a degreasing zone above the solvent bath around work pieces supported therein and creates a primary barrier preventing the vaporized solvent from escaping the tank. The secondary solvent condenser creates a cold air blanket above the degreasing zone which acts as a secondary barrier preventing the vaporized solvent from escaping the tank. The single refrigeration unit simultaneously provides low-temperature refrigerant to the secondary solvent condenser and the primary solvent condenser in a first mode. The single refrigeration unit simultaneously provides low-temperature refrigerant to the primary solvent condenser and hi-temperature refrigerant to the secondary solvent condenser in a second mode.
REFERENCES:
patent: 4390396 (1983-06-01), Koblenzer
patent: 4537660 (1985-08-01), McCord
patent: 5327920 (1994-07-01), Gerard et al.
patent: 5417769 (1995-05-01), Gerard et al.
patent: 5454390 (1995-10-01), Lawson et al.
patent: 5469876 (1995-11-01), Gray et al.
patent: 5492138 (1996-02-01), Taricco
European Patent Office 241,749 134/105, Oct. 1987.
A. Earley John F.
A. Earley III John F.
Stinson Frankie L.
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