| 摘要 |
a steam-generation controller for controlling steam generation and injection in the case where a cleaning for the interior of the suction unit body is executed in the steam injection manner. The steam-generation controller comprises a heater box in which a plurality of steam injection holes, a water box installed on the upper portion of the heater box, for supplying water to a heater, a valve assembled in the lower portion of the water box and assembled with the inner side of the heater box at the lower end portion thereof, and a solenoid valve assembled with the water box and for selectively opening/closing the valve.
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