Pressure controlled cleaning system

Details Pressure controlled cleaning system Pressure controlled cleaning system

1994-11-08

1995-09-12

Stinson, Frankie L.

Cleaning and liquid contact with solids

Apparatus

With heating, cooling or heat exchange means

134200, 277 59, B08B 1502

Patent

active

054490103

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: 3144035 (1964-08-01), Hablanian et al.
patent: 3181873 (1965-05-01), Reed
patent: 3905450 (1975-09-01), Persson
patent: 4174672 (1979-11-01), Cox
patent: 4252352 (1981-02-01), Scannell
patent: 4335883 (1982-06-01), Le Roux et al.
patent: 4469335 (1984-09-01), Moore
patent: 5118357 (1992-06-01), Sabatka

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