A fault detection method for thermocouple and ntc temperature sensor of gas stove

Abstract

The invention relates to a breakdown detecting method of a thermocouple and an NTC temperature sensor of a gas stove. The breakdown detecting method is characterized in that in the normal using process of the gas stove, whether the thermocouple and the NTC temperature sensor break down or nor is judged through the following steps: 1, the electromotive force Vn of the thermocouple and the partial pressure Dn of the NTC temperature sensor are collected every 5-10 seconds; 2, the electromotive force Vn of the thermocouple is compared with a preset breakdown electromotive force value V of the thermocouple, if Vn minus V is larger than or equal to 5 mV and Dn minus D is larger than or equal to 3 mV, a signal of normal working of the thermocouple and the NTC temperature sensor is output, otherwise, a signal of normal working of the thermocouple and a signal of disconnection of the NTC temperature sensor are output; and if Vn minus V is smaller than 5 mV and Dn minus D is larger than or equalto 3 mV, a signal of disconnection of the thermocouple and a signal of normal working of the NTC temperature sensor are output, otherwise, the signal of disconnection of the NTC temperature sensor and the signal of disconnection of the thermocouple are output. Compared with the prior art, the breakdown detecting method has the advantage that the thermocouple and the NTC temperature sensor can bemutually detected.

Description

technical field [0001] The invention relates to a fault detection method for a thermocouple and an NTC temperature probe of a gas cooker. Background technique [0002] With the intelligentization of gas stoves, it has become a mainstream trend of smart stoves to use thermocouples to detect whether there is fire in the gas stove, and to use NTC temperature sensors to detect the temperature of the bottom or inside of the pot for intelligent control. Due to the use of thermocouples and NTC temperature sensors, there is a possibility of device disconnection, which affects the normal use of the cooker. Therefore, how to detect short-circuit and open-circuit faults of thermocouples and NCT temperature sensors has become a problem that must be solved for smart gas cookers. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a thermocouple and NTC temperature sensor fault detection method for a gas cooker in view of the abov...

AI Technical Summary

Problems solved by technology

Due to the use of thermocouples and NTC temperature sensors, there is a possibility of device disconnection, which affects the normal use of the cooker. Therefore, how to detect short-circuit and open-circuit faults of thermocouples and NCT temperature sensors has become a problem that must be solved for smart gas cookers.

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