| 摘要 |
PURPOSE: A coil of an electronic valve is wound as a primary coil and a secondary coil to prevent energy loss and safety accident by an overheating. CONSTITUTION: In opening and closing of an electronic valve(2) using a magnetic energy by an applied voltage, a coil(9) of the electronic valve is wound in a primary coil and a secondary coil. When opening the electronic valve, the primary coil and the secondary coil are connected in parallel and a rating voltage is applied. When maintaining the open state of the valve, the primary coil and the secondary coil are connected in series and a low voltage is applied. A controller controls the connecting state of the primary coil and the secondary coil.
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