Single-live-wire switch

Abstract

The invention relates to a single-live-wire switch. The single-live-wire switch is characterized by comprising a rectifier bridge, an optical coupler, a diode, a capacitor, a bidirectional silicon controlled rectifier, a first resistor, a second resistor and a control module; the rectifier bridge is connected to an alternating current after being sequentially connected with the second resistor and a load in series; one connection end of the rectifier bridge is grounded, and the other connection end of the rectifier bridge is connected with a positive electrode of the diode and the output end of the optical coupler; a negative electrode of the diode is connected with the input end of the control module and one end of the capacitor; the other end of the capacitor is grounded; the output end of the control module is connected with the first resistor; the other end of the first resistor is connected with the input end of the optical coupler; the other two ends of the optical coupler are grounded; one end of the bidirectional silicon controlled rectifier is connected with a live wire, and a control electrode and the other end of the bidirectional silicon controlled rectifier are connected with two ends of the second resistor respectively. The single-live-wire switch has the advantages that a single-live-wire electricity supply circuit is used for powering the switch, the wiring problem is solved, the whole circuit is low in power consumption, influences on the load are small, and stable operation of the load is guaranteed.

Description

technical field [0001] The invention relates to the technical field of home appliance switches, in particular to a single live wire switch. Background technique [0002] In order to make the switch control of home lighting and electrical appliances intelligent, single live wire switches gradually replace traditional mechanical wall switches. Since ordinary households at home and abroad are mostly wired with single live wires, according to the traditional method, if you want to use a switch that itself needs power supply, you need to rewire. increase, so there is an urgent need for a single live wire power-taking switch to solve the wiring problem. Since the standby power of the single live wire switch is powered by the current flowing through the load to the control circuit of the switch, the switch itself needs to consume a certain amount of current. If the standby input current is small, the standby circuit will not work. If the standby input current is large, the standby...

AI Technical Summary

Problems solved by technology

Since ordinary households at home and abroad are mostly wired with single live wires, according to the traditional method, if you want to use a switch that itself needs power supply, you need to rewire. increase, so there is an urgent need for a single live wire power switch to solve the wiring problem

Since the standby power of the single live wire switch is powered by the current flowing through the load to the control circuit of the switch, the switch itself needs to consume a certain amount of current. If the standby input current is small, the standby circuit will not work. If the standby input current is large, the standby circuit will not work. Will cause load current instability

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