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Induction-heating cooker and sensor unit

An induction heating and cooker technology, applied in induction heating, induction heating devices, electric/magnetic/electromagnetic heating, etc., can solve the problems of decreased precision, unstable output, and decreased accuracy of cooking container temperature detection, and achieves suppression of overlapping, Effect of simple structure and improved temperature detection accuracy

Active Publication Date: 2020-02-11
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Here, in the case of the infrared sensor method, a part of the magnetic flux generated from the heating coil enters the infrared sensor, whereby high-frequency noise is superimposed on the output of the infrared sensor, and the output becomes unstable.
Therefore, there is a problem that the temperature detection accuracy of the cooking container is lowered, and the accuracy of the appropriate temperature cooking or automatic cooking function is also lowered.

Method used

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  • Induction-heating cooker and sensor unit
  • Induction-heating cooker and sensor unit
  • Induction-heating cooker and sensor unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0063] (Structure of induction heating cooker)

[0064] First, the configuration of the induction heating cooker 1 will be described. figure 1 It is a schematic perspective view of the induction heating cooker 1 in Embodiment 1. Such as figure 1 As shown, the induction heating cooker 1 includes a main body 2 and a top plate 3 arranged on the upper surface of the main body 2 . A front surface operation unit 21 is provided on the front surface of the main body 2 . A power switch 22 for turning on / off the power supply of the induction heating cooker 1 and a plurality of operation dials 23 for adjusting heating power are arranged on the front surface operation part 21 .

[0065] The top plate 3 is composed of, for example, a heat-resistant glass plate and a metal frame. A plurality of (three in this embodiment) circular heating ports 30 indicating heating regions are provided on the upper surface of the top plate 3 by printing or the like. Cooking containers 100 such as pots ...

Deformed example 1-1

[0133] Figure 16 is a plan view of the non-contact temperature sensor 7A in Modification 1-1, Figure 17 so Figure 16 A longitudinal sectional view obtained by cutting the non-contact temperature sensor 7A in Modification 1-1 along line A-A. In addition, in Figure 16 and Figure 17 in, right with Figure 10 and Figure 11 The same reference signs are assigned to the same constituent elements as shown.

[0134] Such as Figure 16 and Figure 17 As shown, magnetic circuit forming mechanism 200A in proximity temperature sensor 7A of this modified example has a larger area than substrate 212 of infrared sensor unit 210 in plan view, and is arranged to cover substrate 212 . In addition, the length of the side parallel to the direction of the magnetic flux passing through the substrate 212 may be longer than the length of the side parallel to the direction of the magnetic flux of the substrate 212 in the magnetic path forming mechanism 200A. In addition, an opening 201 t...

Deformed example 1-2

[0137] Figure 18 is a plan view of the non-contact temperature sensor 7B in Modification 1-2, Figure 19 It is a figure explaining the guidance of the magnetic flux by the magnetic path formation mechanism of the modification 1-2. In addition, in Figure 18 and Figure 19 in, right with Figure 10 The same reference signs are assigned to the same constituent elements as shown.

[0138] Such as Figure 18 and Figure 19 As shown, the non-contact temperature sensor 7B of this modified example includes a first magnetic path forming mechanism 200Ba and a second magnetic path forming mechanism 200Bb facing each other across the opening 231 on the upper surface of the upper case 230 . The first magnetic path forming mechanism 200Ba and the second magnetic path forming mechanism 200Bb each have a rectangular flat plate shape and are arranged in parallel to the direction of the magnetic flux generated in the proximity temperature sensor 7B. In addition, the first magnetic path...

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Abstract

This induction-heating cooker comprises: a top plate whereon a cooking container is to be placed; a heating coil disposed below the top plate, for heating the cooking container; an infrared ray sensordisposed below the heating coil, for detecting infrared rays emitted from the cooking container; a sensor case accommodating the infrared ray sensor; and a magnetic path forming means disposed on theupper surface of the sensor case. The magnetic path forming means induces a magnetic flux generated from the heating coil and passing over the infrared ray sensor.

Description

technical field [0001] The present invention relates to an induction heating cooker and a sensor unit provided with a sensor for obtaining the temperature of a cooking vessel. Background technique [0002] In recent years, induction heating cookers that heat cooking items by induction heating have become widespread. The induction heating cooker uses the magnetic flux generated by passing current through a metal body such as a heating coil arranged in the heating cooker to generate an eddy current in the main body of the cooking container placed above the heating coil through the top plate, and utilizes the magnetic flux generated by the cooking container Joule heat generated by the electrical resistance of the main body heats the cooking vessel. [0003] Conventionally, as a method of detecting the temperature of the cooking container body, which is an object to be heated placed on the top plate of an induction heating cooker, a thermistor method using a contact-type temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/12
CPCH05B6/062H05B2213/07H05B6/1254H05B6/1272Y02B40/00H05B6/1263H05B6/6455
Inventor 井下千鹤森井彰吉野勇人
Owner MITSUBISHI ELECTRIC CORP
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