Electric leakage detection circuit and electric leakage detection method of electric water heater

Abstract

The embodiment of the invention discloses an electric leakage detection circuit and an electric leakage detection method of an electric water heater. The electric leakage detection circuit of the electric water heater comprises a current induction module, a comparison module and a control module, the first detection signal input end of the current induction module is connected to a first signal line, the second detection signal input end of the current induction module is connected to a second signal line, the first signal line and the second signal line are any two lines of a live line, a zero line and a ground line respectively, the current induction module adjusts an output induction signal according to whether electric leakage occurs between the first detection signal input end and thesecond detection signal input end, the comparison module adjusts the output pulse signal according to the size relation between the voltage difference value of the induction signal and the voltage value of a preset reference signal, and the control module controls the heating loop of the electric water heater to be connected or disconnected according to the duration of the pulse segment set in the pulse signal. The reliability of the electric water heater electric leakage detection circuit for achieving the electric leakage protection function is improved while electric leakage protection isachieved, and the electric leakage misjudgment probability is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of electric water heaters, and in particular to an electric water heater leakage detection circuit and a leakage detection method thereof. Background technique [0002] With the popularity of smart home appliances, users have higher and higher requirements for the security of smart home appliances. The application places of electric water heaters are generally places such as toilets or shower rooms, and electric water heaters have a high risk of electric leakage. How to realize electric leakage protection for electric water heaters has become an urgent problem to be solved. [0003] In addition, the current electric water heater directly mechanically cuts off the power supply of the electric water heater to turn off the electric water heater when it detects the leakage of the live wire or the neutral wire, which makes it easy to misjudge whether there is a leakage between the live w...

AI Technical Summary

Problems solved by technology

The application places of electric water heaters are generally places such as toilets or shower rooms. The danger of electric water heater leakage is extremely high. How to realize the leakage protection of electric water heaters has become an urgent problem to be solved.

[0003] In addition, the current electric water heater directly mechanically cuts off the power supply of the electric water heater to turn off the electric water heater when it detects the leakage of the live wire or the neutral wire, which makes it easy to misjudge whether there is a leakage between the live wire and the neutral wire. Poor user experience in using electric water heaters

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