| 摘要 |
<p>A control unit (10) activates a water extraction or suction valve used in association with especially a urinal, toilet or wash-basin. The unit is activated by e.g. a pushbutton (18) incorporated within a housing (14) and linked to a first valve (52). The valve (50) piston is adjustable and operates within a second chamber subdivided (34,36) into two by a membrane (46). The second chamber (44) is linked to the suction or water valve to the suction source. After operation of the pushbutton against the counter-force provided by the housing, the pushbutton returns to its initial position at atmospheric pressure. A spring (54) acts upon the membrane in the direction of the second chamber.</p> |
