| 摘要 |
PURPOSE: An electric dryer having vacuum dry function is provided to also perform high-temperature drying at atmospheric pressure such as a general dryer according to characteristic of drying subject. CONSTITUTION: A drying room(10) is located with several trays(14) which is placed with drying object in an interval of top and bottom. A dry heat generator(20) generates heat by using electric power. A blower fan let generated heat passes through tray and tray within drying room. A wet heat air discharge pipe(40) ejects wet-heated air to outside of a drying room. An external air influx quantity control valve controls inflow of outside air supplied to a drying room. A wet heat air exhaust amount control valve(60) is installed in the wet heat air discharge pipe on control ejected degree of wet-heated air. A wet heated air reuse pipe(70) is connected to wet heat air discharge pipe so that it supplies wet heated air to the drying room. A reuse wet heat amount control valve(80) controls an amount of wet heated air. The air of the amounts which are more than amount of the air which the n. vacuum pressure production measure is flowed in within the drying room is exploded through the outside of the drying room with compulsive discharge and the air does so that it becomes the pressure in which the pressure is low in the drying room than the atmospheric pressure. A controller(100) automatically controls the opening and closing amount of an external air influx quantity control valve, a wet heat air exhaust amount control valve, and IOP of reuse wet heat amount control valve based on data sensed through a system for sensing temperature(11), a humidity sensor(12), and a pressure transmitter(13). |
