Water boiling judgment control method for heater

Abstract

The invention discloses a water boiling judgment control method for a heater. The control method comprises the following steps that the heater starts working according to a preset power-regulating ratio; when the preset temperature is reached, the heater stops heating; the time of the heater stopping heating reaches the preset time, the maximum temperature value Tmax and the minimum temperature value Tmin in the present time are recorded, and the difference between the two values is worked out according to the formula of delta T=Tmax-Tmin; the delta T refers to the difference grade of the preset temperature, and based on the temperature difference grade in which the delta T falls, two boiling states are judged, namely the boiling state is judged to be reached and the boiling process is judged to be finished or the boiling state is judged not to be reached; and the heater works according to the preset power-regulating ratio corresponding to the temperature difference grade in which the delta T falls, and the whole process is repeated. The control method can accurately judge whether water in the heater is boiling, and when the boiling state is judged not to be reached, and additional heating with different heating capacity is performed, so that the phenomenon of overflow or insufficient heating when the heater works is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of electric heating appliances, in particular to a control method for judging boiling of a heater. Background technique [0002] In the process of cooking rice, porridge, and soup with electric heating cooking products such as electric rice cookers, electric pressure cookers, and electric saucepans, it is very important to judge when rice water and soup boil. If the power is heated, the rice will not be fully cooked and the soup will not boil. If the judgment of boiling lags behind, it will lead to too much heating and foam overflow. Therefore, it is particularly important to perceive boiling. [0003] At present, there are mainly the following methods to judge boiling: one is to install a temperature sensor on the upper cover. When the water boils, the product will be filled with steam. After the value is measured in the experiment, set it in the program. When the temperature sensor on the upper cover reac...

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Problems solved by technology

[0004] However, the above-mentioned first method will greatly increase the cost of the product; the second method believes too much in the accuracy of water level judgment, cannot be compatible with the d

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