| 摘要 |
PROBLEM TO BE SOLVED: To reduce size and weight of whole the apparatus, to allow easy confirmation of steam jetting and stain sucking state, to facilitate maintenance, and to improve operability. SOLUTION: When an operation switch 4 is in an ON state, steam sucked from a suction passage 2 in a suction nozzle 21 side is condensed on an inner periphery surface of an outer cylinder 31, and collected in an sewage tank 23 together with sucked droplets (contaminated water) and softened and removed stain from a lower opening 31c. Air and others are centrifugally separated from sucked air, steam, sewage and stain; comparatively large suspended dust that may clog the passage 2 among suspended dust sucked together with air into the passage 2 of a negative pressure generating part 25 side, is collected by a collection filter 35; and relatively small suspended dust is collected by a filter 25c for a fan. When the switch 4 is in an OFF state, back flow of the sewage in the sewage tank 23 to the suction nozzle 21 or to the negative pressure generating part 25 is prohibited, to prevent leakage of the sewage during transportation. COPYRIGHT: (C)2005,JPO&NCIPI
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