| 摘要 |
<p>A vacuum-type automatic dehumidifying and drying apparatus for powdered or granular material such as a pelletized or powdered resin or the like, provided with a drying hopper (1) connected to an evacuating means (27) having at its bottom a material discharge valve (24), and provided with a material collector (22) communicating with the drying hopper (1) via a material feeding valve (23) above the drying hopper (1) for collecting the powdered material therein. The apparatus comprises a double constructed drying hopper (1) having a cylindrical main body (1a) made of a high heat conductivity material provided on its inner peripheral surface with plural fins , which define compartment walls, projecting inwardly and provided on its outer peripheral surface with a heating means (3) surrounding the cylindrical main body (1a). The main body (1a) is outwardly enclosed with a heat insulation wall (2), and comprises an outer air inlet (28) for introducing outer air thereinto, a material sensor (14) for detecting amount of the material stored in the hopper (1), and an evacuating means (27) connected to the main body (1a). <IMAGE></p> |
