| 摘要 |
PROBLEM TO BE SOLVED: To easily exchange a liquid storage tank and prevent the leak of offensive odors generated in the tank, in a hood arranged with the exchangeable liquid storage tank in a space under a workroom, by treating discharged sump solution from the tank which is filled up with liquid. SOLUTION: In this hood with a liquid storage tank where air is evacuated from the workroom, a fluid flowing-out hole is perforated in a sink forming the bottom part of a working space, and a shelf board which can slide back and forth and in the side direction, correspondingly to the opening of the fluid flowing-out hole in a space under the sink is installed on a chamber base. A sump solution storage tank provided with a mouth part which is fitted to the flowing-out hole in the case that the shelf board is pulled out to the outside of a chamber is mounted on the upper surface of the shelf board. When the shelf board is inserted into a fixed position of a chamber base part, the fluid flowing-out hole of the sink and the passage of the mouth part of the storage tank are fitted to each other, thereby the fluid which flows down from the outflow port of the sink can be received in the liquid storage tank.
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