Electronic cigarette oil leakage protection device and method

Abstract

The invention relates to an electronic cigarette oil leakage protection device and method. The electronic cigarette oil leakage protection device comprises an airflow inductor, an airflow induction discrimination circuit and an electric heating wire control unit. The airflow inductor is used for detecting the flow direction and flow of airflow flowing through the electronic cigarette and converting the flow direction and flow into output capacitance; the airflow induction discrimination circuit is used for detecting the output capacitance of the airflow inductor and judging whether the outputcapacitance exceeds a first capacitance threshold value and a second capacitance threshold value or not, wherein the smoking state is judged only when the output capacitance exceeds the second capacitance threshold value and the time spent in increasing the output capacitance from the first capacitance threshold value to the second capacitance threshold value is smaller than a first time interval;the electric heating wire control unit controls the electric heating wire to heat based on the discrimination result of the airflow induction discrimination circuit; wherein the first capacitance threshold is smaller than the second capacitance threshold. Smoking and oil leakage states are accurately judged through the capacitance threshold value and the time interval, so that spontaneous combustion caused by oil leakage misjudgment is avoided, and the use safety of the electronic cigarette is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electronic cigarettes, in particular to an electronic cigarette oil leakage protection device and method. Background technique [0002] The structure of e-cigarettes on the market is mainly composed of three parts: a smoke tube filled with nicotine solution, an evaporation device and a battery. Among them, the airflow and e-liquid share the same channel. As we all know, the dielectric coefficient of e-liquid is much larger than that of air. During use, e-liquid often moves or gravity flows into the airflow channel, so that the airflow sensor detects that the capacitance increases; in the prior art, the electronic cigarette smoking control device judges the smoking state through the capacitance change, and the electronic cigarette device cannot distinguish between smoking or oil leakage. The increase in the capacitance of the electronic cigarette will easily lead to misjudgment of smoking, cause spontaneou...

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Problems solved by technology

[0003] The invention aims to solve the problem of spontaneous combustion caused by the inability to distinguish oil leakage and smoking state in the prior art. The invention provides an electronic cigarette oil leakage device and method

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