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Induction cooking device

A technology of induction heating and cooker, applied in induction heating, induction heating device, electric/magnetic/electromagnetic heating, etc., can solve the problem of increasing electrode electrostatic capacitance, reduce heating output, avoid boiling over, and prevent unnecessary the effect of interrupting the cooking

Inactive Publication Date: 2014-11-26
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This structure utilizes the phenomenon that when the boiling over liquid spreads to the upper surface of the top plate near the electrodes, the electrostatic capacitance of the electrodes increases compared to when no boiling over occurs

Method used

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  • Induction cooking device
  • Induction cooking device
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Examples

Experimental program
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Embodiment approach 1

[0042] figure 1 It is a block diagram showing the configuration of the induction heating cooker according to Embodiment 1 of the present invention. figure 2 (a) is a waveform diagram showing the output voltage from the voltage conversion unit to the boiling over detection unit in the induction heating cooker according to Embodiment 1 of the present invention. figure 2 (b) is a waveform diagram showing the heating output of the second heating coil in the induction heating cooker according to the first embodiment.

[0043] exist figure 1 In the induction heating cooker according to Embodiment 1, two heating coils, namely, a first heating coil 3a and a second heating coil 3b, are provided below the top plate 2 constituting the upper outer contour of the induction heating cooker according to Embodiment 1. As the top plate 2 of the induction heating cooker according to Embodiment 1, an example in which crystallized glass is used will be described, but the present invention is...

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Abstract

In an induction cooking device according to the present invention, a boiling-over detection portion (22) is adapted to perform a heating-output suppression operation, on detecting boiling over, when the capacitances of electrodes (4) have been changed by an amount equal to or more than a predetermined value. Further, the boiling-over detection portion (22) is prevented from performing the heating-output suppression operation, if the boiling-over detection portion (22) detects that the capacitances of the electrodes (4) have been changed by an amount equal to or more than the predetermined value, due to the fact that the heating output of another heating coil (3b) in a heating area which is not subjected to boiling-over detection has been changed by an amount equal to or more than a predetermined change width.

Description

technical field [0001] The present invention relates to an induction heating cooker, and particularly relates to an induction heating cooker capable of detecting boiling over of a liquid overflowing from a heated container such as a pan during heating and cooking. Background technique [0002] Conventionally, in this type of induction heating cooker, by measuring the capacitance of electrodes arranged on the lower surface of the top plate and detecting the increase in the capacitance, it is determined that boiling over has occurred, and the heating operation is stopped or the heating flow is reduced. High-frequency current of the coil (for example, refer to Japanese Patent Application Laid-Open No. 2008-159494 (Patent Document 1)). This structure utilizes the phenomenon that when the liquid boiled over spreads to the upper surface of the top plate near the electrodes, the electrostatic capacity of the electrodes increases compared to when no boiled over occurs. [0003] im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B6/12
CPCH05B6/062
Inventor 福田弘武平高志
Owner PANASONIC CORP
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