A control system and method for detecting boiling water in an induction cooker with an audio curve
A control system and induction cooker technology, applied in the field of induction cooker, can solve problems such as poor thermal conductivity of panels, waste of electric energy or health hazard in temperature sensing technology, and water boiling can not be detected long after boiling, so as to achieve the effect of preventing electric energy waste.
Active Publication Date: 2017-01-11
中山市法兰宝电业有限公司
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[0003] The technical problem addressed by the present invention is the switch control when the induction cooker boils water. The existing method is that after the kettle is placed on the induction cooker, the user presses the button for boiling water, the coil of the induction cooker is powered on, and the bottom of the kettle produces eddy currents to heat the water in the kettle. Automatically cut off the power supply or stop heating until boiling. The automatic switch control here is based on the above-mentioned temperature detection process. The temperature detection uses a temperature sensor, and the sensor is installed in the induction cooker. Therefore, the sensor is separated from the kettle on the induction cooker by the panel of the induction cooker. , The thermal conductivity of the panel is poor, and there are scattered reasons such as components, pots, and production processes; the sensitivity of the sensor to actually detect the temperature is low, and it is easy to detect the boiling of the water long after the water boils, or stop heating before the water boils. , and then cut off the power supply, this temperature sensing technology has caused a lot of power waste or health hazards due to the hysteresis of detection
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[0035] Such as figure 1 As shown, S1 is the temperature change curve of water, and S2 is the noise change curve of the water boiling process. As we all know, during the heating process of water, S1 initially rises slowly, and after a certain period of time, it shows a steady linear rise. , and reach the highest temperature when it is about to boil, that is, the boiling point of water is 100°C, and then tend to be flat; correspondingly, during the heating process of water, the initial noise of S2 is low, and it suddenly becomes louder when it is about to reach the boiling point, reaching a peak , and then with the gradual reduction of the bubbles in the water, the noise also decreases until a lower noise value, that is, the trough, and the water boils at the time of the trough. This is the law of daily life that we know, and the present invention uses this law , to control the automatic shutdown of the boiling water of the induction cooker to save electric energy;
[0036] ref...
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The invention discloses a control system for audio curve detection of boiling water in electromagnetic oven and a control thereof. By utilizing the audio curve change law of water during boiling, including a series of changes from peak to valley to reach the boiling point of water, the method skillfully combines the temperature change law of water boiling with the noise change law, and solves the problems of hysteresis existing in temperature detection of the electromagnetic oven; according to the method, the direct detection based on the temperature sensor is replaced by an indirect detection method based on noise detection which has the advantage of no limitations of the face plate of the electromagnetic plate, so that the boiling point of water can be detected in time so as to cut off the power to avoid waste of electric energy.
Description
technical field [0001] The invention relates to an induction cooker, in particular to a control system and method for detecting boiling water in an induction cooker by an audio frequency curve. Background technique [0002] With the intelligentization of household appliances, their functions are becoming more and more diverse. For example, induction cookers include functions such as steaming, boiling, frying, frying, and frying. These functions are generally based on temperature control, that is, there is a temperature detection, temperature Feedback, the process of implementing control. [0003] The technical problem addressed by the present invention is the switch control when the induction cooker boils water. The existing method is that after the kettle is placed on the induction cooker, the user presses the button for boiling water, the coil of the induction cooker is powered on, and the bottom of the kettle produces eddy currents to heat the water in the kettle. Automa...
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IPC IPC(8): F24C7/08
Inventor 邓锦标周晓明欧曾成涛吴锴奇江海涛
Owner 中山市法兰宝电业有限公司