Control device for disconnecting double wires with single-line switch

The utility model discloses a control device for disconnecting double wires with a single-line switch. The control device comprises a live wire, a null line, a single-line switch, a low-voltage DC relay, a first relay contact, a second relay contact, a capacitor, four rectifier diodes, a voltage-regulator diode, an electrolytic capacitor, and an electric appliance. The live wire is connected with the first relay contact through the single-line switch. The first relay contact is connected with the electric appliance. The null line is connected with the electric appliance through the second relay contact. The four rectifier diodes are connected to form a rectifier bridge. The capacitor is connected with an ac1 end. The null line is connected with an ac2 end. The voltage-regulator diode, the electrolytic capacitor and the low-voltage DC relay are connected in parallel with a positive end and a negative end. The control device is small in size and can be directly arranged inside the electric appliance. After the switch is switched off, it is guaranteed that the electric appliance is thoroughly and simultaneously disconnected with the null line and the live wire of a power grid and that an electric leakage hidden danger is prevented whether the original single-line switch is connected with the null line or the live wire.