Anti-dry-burning detecting method and detecting device of gas stove and gas stove

Abstract

The invention discloses an anti-dry-burning detecting method and detecting device of a gas stove and a gas stove. A corrected light source emits an infrared radiation pulse to the bottom of a pot; theinfrared radiation pulse is reflected by the bottom of the pot, a corrected infrared detector receives the pulse and the pulse is converted into an electric signal; the reflectivity and emissivity ofthe bottom of the pot are calculated; the corrected light source is turned off; an infrared temperature measuring detector receives infrared radiation energy emitted by the bottom of the pot and theinfrared radiation energy is converted into an electric signal, and the infrared radiation energy emitted by the pot bottom is obtained; the temperature of the pot bottom is calculated; whether a gasstove is in a dry burning state is determined based on the temperature of the pot bottom; and if so, a gas valve is turned off or alarming is performed. Therefore, when different pots are used, the bottom temperature of the pot is calculated based on the corresponding emissivity of the bottom of the pot, so that an accurate temperature value is obtained. A problem of inaccurate temperature measurement caused by the large emissivity difference of the pot bodies in the prior art is solved. The accuracy of the detected bottom temperature is improved and the accuracy of the anti-dry-burning control is enhanced.

Description

technical field [0001] The invention belongs to the technical field of gas stoves, and in particular relates to a gas stove anti-dry detection method, a detection device and a gas stove. Background technique [0002] The gas stove is a necessary daily necessities for the family and plays a very important role in daily life. [0003] Gas stoves have a wide range of applications, and it is easy to forget to monitor the cooking, causing the pot to continue to dry, damaging the pot or causing a fire. The dry-boil prevention system can effectively detect the dry-boil state, alarm the user or close the gas valve in time. [0004] The current anti-dry solution has the following disadvantages: [0005] 1. The temperature measuring device used in the anti-dry burning application in the existing gas stove uses a contact temperature sensor such as a thermocouple or a thermistor. The temperature measuring device directly contacts the bottom of the pot or contacts the bottom of the pot...

AI Technical Summary

Problems solved by technology

See CN101382303B, there are certain defects in this structure, the flame is easy to directly heat the temperature measuring probe, causing interference; poor contact between the temperature measuring probe and the bottom of the pot is also likely to cause measurement errors

[0006] 2. The existing scheme uses infrared temperature measurement technology to detect the temperature of the bottom of the pot and applies it to the gas stove, but there is a flame in the gas stove, and the flame will cause certain interference

This design does not completely improve the disadvantages of the thermocouple-type traditional gas stove temperature measurement method. Poor contact is still easy to cause errors, and the flame directly heats the metal isolation ring. It is also easy to cause errors. In order to reduce the heat brought by the flame, the burner structure need special optimization

[0007] 3. Existing infrared temperature measurement schemes for gas stoves, the accuracy of temperature measurement is greatly affected by the emissivity of the bottom of the pot

However, the temperature measuring device is a contact type, which does not give full play to the non-contact advantages of infrared temperature measurement, loses the meaning of infrared temperature measurement, and cannot avoid the influence of poor contact and flame heating metal isolation ring interference

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