Pressure connection detection circuit for induction heating type cooker

Abstract

The present invention relates to a pressure connected state detection circuit of induction type heating cooker. Said device is formed from Hall integrated circuit, Hall integrated circuit input power supply control portion, pressure connected state detection portion and microcomputer. The Hall integrated circuit after which is switched on can be worked to detect the pressure movement of cooke cover, and the Hall integrated circuit input powder supply control portion can be used for controlling switching-on and switching-off of the supply power source of Hall integrated circuit, and the pressure connected state detection portion can be used for controlling output voltage according to the power supply of Hall integrated circuit, and the microcomputer is used for controlling Hall integrated circuit input power supply control portion and can be used to judge the Hall integrated circuit is normally worked or not.

Description

technical field [0001] The invention relates to an induction heating pot, in particular to a pressure connection detection circuit of the induction heating pot. Background technique [0002] In the induction heating pot, when the working coil flows through the working current, the generated magnetic field lines pass through the pot body, and the pot body itself is heated, thereby implementing the function of cooking (cooking) rice. When analyzing the basic heating principle of the above-mentioned induction heating pot, it can be seen that if a current is applied to the working coil, then the heating pot as a magnetic body is heated due to induction (Induction), and burns (boils) in the heating pot meal. [0003] Induction heating pot, in order to generate magnetic lines of force, a high-frequency voltage of a specified size must be added to the working coil. At this time, due to the effect of the high-frequency voltage applied, the working coil will generate a strong "fire...

AI Technical Summary

Problems solved by technology

In other words, the existing pot lid connection detection circuit has the problem of generating errors in the operating point of the above-mentioned guide switch due to the strength of the above-mentioned magnetic field.

[0019] Moreover, due to the action sensitivity error of the guide switch, there will be exactly the same error as the above-mentioned magnetic field strength

That is to say, the existing pot lid connection detection circuit will also produce errors in the action point due to the deviation of the action sensitivity of the guide switch.

[0020] Simultaneously, the existing pot lid connection detection circuit has no way for the microcomputer 10 to detect whether the guide switch itself is good or not.

Since there is no countermeasure for whether the single switch is good or not, in order to form a double safety method, the method of connecting two guide switches in series is adopted, which has the problem of increasing the production cost

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