| 摘要 |
PROBLEM TO BE SOLVED: To provide a dry ice blast device capable of attaining stable feeding of dry ice particles to an injection nozzle by preventing generation of bridges by the dry ice particles. SOLUTION: In the device, the dry ice particle is injected to a surface to be washed to remove a deposition article deposition on the surface to be washed. The device includes a hopper device storing the dry ice particle and provided with a discharge port discharged with the dry ice particle; a dry ice feeding device connected to the hopper device and feeding the dry ice particle to an injection nozzle; and a compression gas feeding device for feeding the compression gas to the injection nozzle. The dry ice feeding device has a screw comprising a helical impeller in a casing having an inlet and an outlet, and the inlet of the casing and the discharge port of the hopper device are communicated/connected to each other. A rubber-like elastic body is interposed between an opening peripheral edge of the discharge port of the hopper device and a peripheral edge of the helical impeller in the screw. COPYRIGHT: (C)2009,JPO&INPIT
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