Pressure controlled cleaning system

Details Pressure controlled cleaning system Pressure controlled cleaning system

1994-11-08

1996-02-20

Stinson, Frankie L.

Cleaning and liquid contact with solids

Apparatus

With heating, cooling or heat exchange means

134108, 134200, B08B 310

Patent

active

054921384

ABSTRACT:
A cleaning system which includes a tank that contains a cleaning fluid. The cleaning fluid is typically in either a liquid, vapor or two-phase state, and is capable of removing grease and other foreign material from an object such as a circuit board. The tank has a heating jacket that provides heat to the cleaning fluid to raise the fluid to the vaporized state. A still is coupled to the tank by a vacuum pump. The pump circulates both liquid and vaporized cleaning fluid through the still which removes the foreign material from the fluid. The system has a pressure control system which controls the pressure of the cleaning fluid within the tank. The vacuum pump and pressure control system insure that the cleaning fluid is maintained in a desired state. The vacuum pump typically reduces the pressure of the cleaning fluid below the operating level of a conventional cleaning tank. The reduction in operating pressure provides a corresponding decrease in the saturation temperature of the cleaning fluid.

REFERENCES:
patent: 1470022 (1923-10-01), McIntyre
patent: 3234660 (1966-02-01), Williams et al.
patent: 3330136 (1967-07-01), Candur et al.
patent: 3426446 (1969-02-01), Lotzsch
patent: 3478689 (1969-11-01), Ball
patent: 3610002 (1971-10-01), Carpigiani
patent: 3936220 (1976-02-01), Henderson
patent: 4006602 (1977-02-01), Fanberg

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