| 摘要 |
PROBLEM TO BE SOLVED: To discharge a gas efficiently according to the concentration of an odor by providing a gas discharge switching means for selection of whether a deodorization section is made to discharge a gas flow after performing deodorization by allowing the gas flow to pass through a deodorization device or to discharge the gas flow without deodorization by not allowing the gas flow to pass through the deodorization device. SOLUTION: When deodorization is not necessary, a constitution wherein a gas flow is discharged without allowing the gas flow to pass through a deodorization case 60 of a deodorization device, particularly a thermal catalyst 76. For this reason, an odor guiding duct 50 is branched to a deodorization exhaust pipe connect to the deodorization case 60 and a direct exhaust pipe guiding to an outside of a device without allowing the gas flow to pass through the deodorization device. Both of the deodorization pipe and the direct exhaust pipe are respectively provided as exhaust switching means with shutters 52D, 52T for closing exhaust passages at vicinities of downstream ends 50d, 50t thereof. Therefore, e.g. the shutter 52D connected to the deodorization pipe is closed and the shutter 52T connected to the direct exhaust pipe is opened, the gas flow can be guided directly to the exhaust pipe. By this method, efficient exhaust can be performed. |
