subject: Microwave Vacuum Dryer Apparatus [print this page] This invention relates to a vacuum freeze dryer apparatus or a vacuum dryer aparatus, equipped with microwave heater apparatuses.As is well known, it is possible by freeze-drying foods and the like to obtain dried products which are in no substantial degree inferior as to their color, flavor, taste and vitamins in comparison with those in the raw materials, and yet furtherit is possible, by adding water or hot water to the dried products, to restore same substantially completely to the state that was observed prior to the drying.
Besides, though the T-shaped branching waveguides, the primary and secondary branching waveguides as well as the slot-array antennas are disposed within the vacuum dryer thank in the embodiment, it may be modified to protrude only the slot-arrayantennas into thevacuum dryer tank.
Microwaves that have not been consumed within the foods form up higher modes within the free space wherein a 3-dimensional transmission takes place to cause said residual microwaves to be transferred to the various electro-conductive walls withinthe vacuum dryer tank or to the foods or the like while being consumed as heat energy.
As above, the dryer apparatus according to this invention is widely available on a commercial scale to the vacuum-freeze drying and to the vacuum drying of the foods, pharmaceuticals and the like, and more particularly to the vacuum-freeze-dryingof the frozen foods.
by: ericfu
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