Multifunctional air switch

Abstract

The invention provides a multifunctional air switch. The invention is characterized in that the multifunctional air switch is provided with an automatic power failure reset circuit and an overcurrent protection circuit, wherein the automatic power failure reset circuit keeps the power failure state when a circuit is energized again after being interrupted and enters the electrifying state after being manually started or started at regular time; when a tandem load current is larger than a preset value, the overcurrent protection circuit cuts off the supply of the load current; and a power supply is connected with the automatic power failure reset circuit in series, is connected with the overcurrent protection circuit and then is connected with a load. The multifunctional air switch has thepower failure protection function by arranging the automatic power failure reset circuit, protects the load during overlarge operating current by arranging the overcurrent protection circuit and effectively integrates the functions of power failure protection reset and overcurrent protection. In addition, the multifunctional air switch can be provided with an indicator lamp and a buzzer so as to display working conditions of power failure reset and overcurrent protection; and the circuits have simple structures and are convenient to use.

Description

technical field [0001] The invention relates to electric appliance control technology, in particular to a multifunctional air switch. Background technique [0002] In many occasions where electricity is used, when a power failure occurs suddenly, the electrical appliances that were in the working state are often still in the on-off state. In the power-on state, if there is no one on duty at this time, the electrical appliances are prone to empty burning, which will lead to accidents and at least waste electric energy in vain. [0003] The main function of the existing air switch is to provide over-current protection function. The over-current protection function includes leakage protection, overload protection or short-circuit protection. There is no integrated power-off protection function. There are also some existing switches with power-off protection function. However, most of them exist as single functional components and do not have the functions of leakage protection...

AI Technical Summary

Problems solved by technology

[0002] In many occasions where electricity is used, when a sudden power failure occurs, the electrical appliances that were in the working state are often still in the on-off state. In the power-on state, if there is no one on duty at this time, the electrical appliances are prone to empty burning, which will lead to accidents, and at least it will waste electric energy in vain

[0003] However, the main function of the existing air switch is to provide overcurrent protection function. The overcurrent protection function includes leakage protection, overload protection or short circuit protection. There is no integrated power-off protection function. There are also some existing switches with power-off protection function. However, most of them exist as single functional components, and do not have the functions of integrated leakage protection, overload protection or short circuit protection. Moreover, the existing power-off protection switches have complex circuit design, high cost, and stability still needs to be improved.

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