Combustion detecting method and device and cooking equipment

Abstract

The invention discloses a combustion detecting method and device and cooking equipment. The method comprises the following steps that an air humidity value and output voltage of a humidity sensor aredetected to obtain the change curve of the air humidity value along with time and the change curve the output voltage of the humidity sensor along with time; and whether combustion occurs or not is judged according to the change curve of the air humidity value along with time and the change curve of the output voltage of the humidity sensor along with time. According to the combustion detecting method and device and the cooking equipment, the effect of detecting food combustion is achieved through the existing humidity sensor; the scheme is simple and effective, the price is low relative to asmoke sensor, the existing equipment can be directly used, and a cavity structure does not need to be changed; the detecting device is not likely to be influenced by food dirt, and the service life islong; and compared with a temperature sensor, the judgment effect is good, the response is fast, and it can be detected that food starts to combust.

Description

technical field [0001] The invention belongs to the technical field of household appliances, and in particular relates to a combustion detection method, device and cooking equipment. Background technique [0002] At present, there are two main schemes for detecting food burning in microwave ovens: the first one is to use a smoke sensor to judge whether the food is on fire by detecting the smoke generated when the food is burning; put an alpha radiation source Am241 in the ionization chamber of the detector , which continuously emits alpha particle rays, impacts nitrogen, oxygen and other molecules in the air with high-speed motion, causes ionization under the bombardment of alpha particles, and produces a large number of positively and negatively charged ions, thus making the originally non-conductive air With conductivity, when a certain voltage is applied to both ends of the ionization chamber, the positive and negative ions in the air will move to the opposite electrodes,...

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Problems solved by technology

[0004] There are obvious shortcomings in the two solutions currently used: the first one uses smoke sensors, because the smoke sensors are relatively expensive, resulting in high cost of the solution, and the microwave oven is used for a long time, and the smoke sensors are easily affected by oil pollution, resulting in false detection results. Accuracy and timeliness; the second solution uses temperature sensors, the detection results are inaccurate, and the response speed is slow, it takes a long time to judge, resulting in untimely detection

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