Method and equipment for heating parts comprising hygroscopic, e

Details Method and equipment for heating parts comprising hygroscopic, e Method and equipment for heating parts comprising hygroscopic, e

1998-10-19

2000-08-29

Wilson, Pamela A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 76, 34 79, 34 92, F26B 2106

Patent

active

061089273

ABSTRACT:
Equipment provides more rapid drying of heating parts comprising hygroscopic, electric insulation made of cellulose and/or plastics. At least two condensers are present, one being used when heating the parts and the other in the distillation stage. As a result removal by distillation is possible any time during heating and during the time intervals when heating is interrupted and the pressure-dropping procedure is carried out in the vacuum vessel. Due to the second condenser (with a second, associated vacuum pump), the heating medium can be cleansed or distilled during the pressure-dropping procedure and simultaneously the suction or drying procedure can be carried out in the vacuum vessel. This feature leads to drying the electrical parts more rapidly than heretofore because the steps of drying the electrical parts and regenerating the heating medium no longer require being consecutive, but instead regeneration can be implemented simultaneously with the evacuation of the vicinity around the electrical parts. By using a two-condenser design and different connecting lines, the versatility of the equipment is substantially increased. For instance the two condensers together with their associated vacuum pumps can be used in parallel for drying to achieve higher drying output and a higher operational rate. However, the two condensers may just as well be used to cleanse the heating medium; in this case they are separate from the vacuum chamber and cool only the heating medium heated by the evaporator and fed through the bypass line.

REFERENCES:
patent: 4054431 (1977-10-01), Kotcharian
patent: 4292744 (1981-10-01), Nabholz
patent: 4424633 (1984-01-01), Bernhardt et al.
patent: 5539995 (1996-07-01), Bran

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