Non-contact shutdown reminding device for high-power electrical appliance

Abstract

The invention belongs to the technical field of electronics, and relates to a non-contact shutdown reminding device for a high-power electrical appliance. The device is composed of a small industrial frequency transformer (inductive probe), a full bridge rectifier, a high-resistance operational amplifier, a level phase inverter circuit, a circulation timing circuit, a delay and DC amplification circuit, a buzzer and a power supply, the device is characterized in that the inductive probe uses the primary of the small industrial frequency transformer, the full bridge rectifier uses a Schottky diode, the high-resistance operational amplifier uses CA3140, and the circulation timing circuit uses CD4060. Based on a principle of refusing to change structure and inner circuits of the high-power electrical appliance, the device, being within 35cm far away from the high-power electrical appliance, can detect whether the high-power electrical appliance is working, and can actively send out shortly changing beep sound at each 15 minutes to remind users of shutting down the power supply of the high-power electrical appliance, so that electricity safety and electrical energy saving are both implemented.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to a non-contact high-power electrical shutdown reminding device, which is mainly used for saving electric power and preventing fires. Background technique [0002] Nowadays, there are more and more high-power electrical appliances, such as: electric irons, electric heaters, air heaters, electric kettles, etc. If these high-power electrical appliances are not in use, if you forget to cut off the power in time, it will not only cause a lot of power waste, but also It meets the environmental protection requirements of energy saving and consumption reduction, and it is very easy to cause fire. Especially those high-power electrical equipments that do not have automatic or timed shutdown functions have potential safety hazards in power consumption. In order to effectively solve this problem, on the basis of not changing the circuit and structure of the original electrical equipment, ...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, there are more and more high-power electrical appliances, such as: electric irons, electric heaters, air heaters, electric kettles, etc. If these high-power electrical appliances are not in use, if you forget to cut off the power in time, it will not only cause a lot of power waste, but also It meets the environmental protection requirements of energy saving and consumption reduction, and it is very easy to cause fire

Especially those high-power electrical equipment that do not have automatic or scheduled shutdown functions have potential safety hazards in power consumption.

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