CLEANING SINK

PROBLEM TO BE SOLVED: To prevent problems such as incompletely closed working door, occurrence of wind noise, occurrence of turbulent flow in a cleaning sink (a) and so on by making the air flow velocity generally constant above the sink irrespective of the opening of the working door. SOLUTION: There is provided damper angle adjustment means 15 for changing the angle of a damper 6 depending on the opening of an working door 2 so that the wind velocity above a sink is generally constant. More specifically, for example, there is provided an opening sensor 3 for detecting the opening of the working door 2 and the damper angle adjustment means 15 is constituted by a servomotor for rotating the rotation axis of the damper 6 controlled by a driving circuit 4 that obtains driving signals by subjecting the output signals from the opening sensor 3 to a processing such as amplification, etc., and the output therefrom.