| 摘要 |
<p>PURPOSE: A system damper with chips for sealing and opening an exhaust duct is provided to improve the efficiency of a damper using the chips for sealing and opening the exhaust duct. CONSTITUTION: A system damper comprises a driving power supply unit, a rectifier circuit unit, a first charging circuit, a first regulated power supply unit, a second regulated power supply unit, a relay circuit unit, a fixed limit switch(38), a switch, a second charging circuit, and a variable limit switch. The switch is turned on when the whole circuit is opened. The switch supplies first regulated power from the first regulated power supply unit. The second charging circuit is charged by the current of the first regulated power supplied through the switch. The variable limit switch converts charged voltage into reverse driving voltage when a power switch is turned off.</p> |
