Circuit for electric leakage detection, electric appliance electric leakage detection method and electric water heater
A voltage detection circuit and leakage detection technology, applied in circuit devices, emergency protection detection, measurement of current/voltage, etc., can solve the problem of inaccurate leakage detection results, and achieve the effect of avoiding unstable reference voltage and improving accuracy.
Pending Publication Date: 2021-10-26
QINGDAO HAIER SMART TECH R & D CO LTD +1
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[0007] Embodiments of the present disclosure provide a circuit for electric leakage detection, a method for electric leakage detection of electrical appliances, and an electric water heater, so as to solve the problem of inaccurate electric leakage detection results in the prior art
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[0033] In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.
[0034] The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used...
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The invention relates to the technical field of electric appliance safety, and discloses a circuit for electric leakage detection, which comprises a first coupling capacitor, a voltage detection circuit and a second coupling capacitor which are sequentially connected in series, wherein the input end of the first coupling capacitor is connected with a detected circuit; the output end of the second coupling capacitor is connected with a zero line; the voltage detection circuit is configured to detect a leakage voltage of the detected circuit. According to the voltage detection circuit, the voltage from the null line to the ground serves as the reference voltage, the null line is grounded at the transformer substation end, unstable reference voltage caused by diversity of wall structures and materials is avoided, and the accuracy of an electric leakage detection result is improved. The invention further discloses an electric appliance electric leakage detection method and an electric water heater.
Description
technical field [0001] The present application relates to the technical field of electric appliance safety, for example, to a circuit for electric leakage detection, a method for electric electric leakage detection, and an electric water heater. Background technique [0002] At present, with the gradual increase in the types of electrical appliances, the safety of electrical appliances has attracted much attention. In particular, the safety of water heaters has become the focus of research on the safety of electrical appliances. The prior art provides many solutions to avoid personal injury to users caused by electrical leakage. [0003] The related technology provides a leakage detection method. The voltage detection module is arranged between the conductor connected to the inside of the electric water heater and the wall, and the wall voltage is used as the reference voltage to overcome the lack of reliable ground reference voltage sampling in the traditional detection met...
Claims
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IPC IPC(8): G01R31/52G01R31/56G01R19/00H02H1/00H02H3/32F24H9/20
CPCG01R31/52G01R31/56G01R19/0084H02H3/32H02H1/0007F24H9/2014
Inventor 张力潇白智锐俞国新陈小雷
Owner QINGDAO HAIER SMART TECH R & D CO LTD