Impedance protection method for electric kettle

Abstract

The invention discloses an impedance protection method of an electric kettle. A sensor is arranged at the bottom of a cavity of a kettle body and is connected with the kettle body through an insulation material, and the upper end of the sensor is exposed in the cavity of the kettle body. A coupler and a single chip memcomputer are arranged on a mainframe, the coupler is connected with the single chip memcomputer, and the kettle body is connected with the single chip memcomputer. The impedance protection method is characterized in that a housing or / and the kettle body of the sensor is connected with the signal end of a first group of capacitors or / and a second group of capacitors and the signal end of the single chip memcomputer, and the first group of capacitors or / and the second group of capacitors are respectively connected through at least two capacitors. When water vapor exists on the surface of the coupler on the mainframe, a power supply PE line is connected with the first group of capacitors and the second group of capacitors. Due to the fact that electric capacities of the first group of capacitors and the second group of capacitors are smaller, the power supply produces weak current, the work and operation of the single chip memcomputer are not affected. Impedance protection is provided for the electric kettle, high-frequency signals can be also coupled, and signal interference is avoided.

Description

technical field [0001] The invention relates to an electric kettle, in particular to an impedance protection method for the electric kettle. Background technique [0002] In the traditional technology, the single-chip microcomputer of the electric kettle is connected to the power supply PE line through a capacitor and then connected to the earth, and the kettle body of the electric kettle is also connected to the earth through the power supply PE line. The electric kettle is grounded in this way. When the surface of the coupler on the host has a lot of water vapor, the power supply PE line is directly connected to the single-chip microcomputer, which is prone to leakage interference, and the single-chip microcomputer is likely to malfunction or malfunction or even damage the single-chip microcomputer. Contents of the invention [0003] The present invention provides the impedance protection method of electric kettle in order to solve above-mentioned technical problem, and ...

AI Technical Summary

Problems solved by technology

The electric kettle is grounded in this way. When the surface of the coupler on the host has a lot of water vapor, the power supply PE line is directly connected to the single-chip microcomputer, which is prone to leakage interference, and the single-chip microcomputer is prone to malfunction or malfunction or even damage the single-chip microcomputer.

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