A wireless zero-crossing on-off switch and control method based on electromagnetic relay

Abstract

The invention relates to an electromagnetic relay based wireless zero-crossing on-off switch and a control method. A transformer and a rectifying circuit are adopted to convert a single-phase alternating current into a pulsating direct current; the pulsating direct current is converted into a pulse direct current through a shaping circuit, and the pulse direct current is used as an external interrupt signal of a single chip microcomputer to realize zero-crossing point detection; after the single chip microcomputer receives a pulse interrupt signal, the relay is started for switching after a delay time based on the time difference of a pulse period and the relay responding time so as to realize the accurate zero-crossing point switching of the single-phase alternating current. According to the electromagnetic relay based wireless zero-crossing on-off switch and the control method provided by the invention, electric arc is not generated, so that the switch loss is lowered and an energy-saving effect is achieved; after the secondary output voltage of the transformer is rectified and filtered, the processed secondary output voltage can supply power to the single chip microcomputer; and meanwhile, a wireless control load switch is adopted, so that electric wires can be saved, and the mounting cost is saved.

Description

technical field [0001] The invention relates to an intelligent energy-saving electrical switch, in particular to a wireless zero-crossing on-off switch and a control method based on an electromagnetic relay. Background technique [0002] In household electricity consumption, since the electric power on both sides of the switch is not zero at the moment of turning on and off, it will cause a certain amount of power loss and even arc, which greatly affects the life of the switch. At the same time, extremely complicated wiring is required when installing household appliances, which not only increases the amount of construction in the home decoration process and the difficulty of installing household appliances, but also increases the cost of installing household appliances due to a large number of wires. In addition, the scattered switch arrangement also makes it inconvenient for users to use. In summary, there is still no suitable home appliance installation solution that can...

AI Technical Summary

Problems solved by technology

[0002] In household electricity consumption, since the electric power on both sides of the switch is not zero at the moment of turning on and off, it will cause a certain amount of power loss and even arc, which greatly affects the life of the switch

At the same time, extremely complicated wiring is required when installing household appliances, which not only increases the amount of construction in the home decoration process and the difficulty of installing household appliances, but also increases the cost of installing household appliances with a large number of wires

In addition, the scattered switch arrangement also makes it more inconvenient for users to use

In summary, there is still no suitable home appliance installation solution that can overcome the above shortcomings

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