A leakage protection circuit for instant hot water dispensers
By introducing a wideband leakage current signal acquisition module and a multi-frequency signal processing module into the instant hot water dispenser, combined with a dual threshold comparator circuit and a relay driver, the problem of insensitivity in high-frequency leakage current signal detection in instant hot water dispensers is solved, and safety protection against high-frequency leakage current is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU YUELONG INFORMATION TECHNOLOGY CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-09
AI Technical Summary
The leakage protection circuit of existing instant hot water dispensers is not sensitive to high-frequency leakage signals, which leads to protection failure and poses a safety hazard.
It employs a wideband leakage current signal acquisition module, a multi-frequency signal processing module, and a protection triggering and execution module, including a full-frequency detection circuit, a bandpass filter circuit, a peak detection circuit, and a dual threshold comparator circuit, in conjunction with a magnetic latching relay driver, to realize the detection and cut-off of high-frequency leakage current signals.
It effectively reduces the protection failure caused by the insensitivity of traditional residual current circuit breakers to high-frequency leakage current signals, and achieves safe protection against high-frequency leakage current.
Smart Images
Figure CN224342918U_ABST