Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1979-06-21
1981-02-17
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 69, 34 92, 34 75, 34 84, F26B 334
Patent
active
042506280
ABSTRACT:
A dryer in which fabrics are dryed quickly and at low temperature by subjecting them to microwave energy in an atmosphere of reduced pressure. The microwave energy elevates the temperature of the water within the fabric to its boiling point, which is quite low because of the reduced pressure, and the water vapor which is released from the fabric is condensed external to the microwave field at the same reduced pressure. In one embodiment the dryer is formed as a clothes dryer wherein the drying chamber is a spherical metallic vacuum vessel; the microwave energy is supplied by a solid state microwave array within the drying chamber; water vapor is condensed by a spray condenser external to the drying chamber; and reduced pressure is obtained by a water jet exhauster, which functions in part as a condenser. Drying time is accelerated by warming the lower surface of the drying chamber with hot water, and a jet of air fluffs the fabric after drying.
REFERENCES:
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patent: 3771234 (1973-11-01), Foster et al.
patent: 3854219 (1974-12-01), Staats
patent: 4015341 (1977-04-01), McKinney et al.
patent: 4057907 (1977-11-01), Rapino et al.
Smith Richard D.
Uthe P. Michael
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