초록 ▼

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 th

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.

대표청구항 ▼

A microwave fabric dryer comprising: means defining a microwave reflective drying chamber for accommodating fabrics to be dried, means defining a vacuum chamber which includes said drying chamber within its boundaries, microwave energy generating means including at least a solid state microwave devi

A microwave fabric dryer comprising: means defining a microwave reflective drying chamber for accommodating fabrics to be dried, means defining a vacuum chamber which includes said drying chamber within its boundaries, microwave energy generating means including at least a solid state microwave device for production of microwave energy at a predetermined frequency, means for directing the microwave energy into the drying chamber, condensing means external to the drying chamber but in fluid communication therewith for condensing water vapor evolved from the drying fabric, air pumping means external to the vacuum chamber for reducing the pressure within the vacuum chamber to a pressure below the vapor pressure of the water during the drying process, and control means for terminating the microwave power when fabrics have reached the predetermined degree of dryness.