| 摘要 |
PURPOSE: An automatic water level controller is provided to prevent a wrong operation and improve an operation reliance of an automatic control water level system of water storage tub by sensing a water level of a water storage tub in a water supply system. CONSTITUTION: A transformer(401) transforms an alternating current 220 voltage into an alternating current 24 voltage. A rectifying and smooth circuit(402) converts the alternating current 24 voltage from transformer(401) into a direct current voltage. Upper and lower tumbler bars(403,404) receive the direct current voltage from rectifying and smooth circuit(402) and sense full and lowest water levels of a water storage tub. The first and second voltage regulator ICs(405) operate according to a contact point signal of upper and lower tumbler bars(403,404). A symmetrical relay(407) controls on/off of a motor/pump. A motor(410) and a motor pump(411) performs a water supply/discharge operation according to an on/off of a power supply relay contact point(409).
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