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induction heating device

An induction heating device, induction heating technology, applied in the direction of induction heating device, induction heating, etc., can solve problems such as wrong action, heating coil output wrong driving signal, etc., and achieve high reliability

Active Publication Date: 2018-11-27
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the above-mentioned conventional structure, even if the power supply of the driving unit is turned off, if noise is induced in the non-operating heating coil, noise may be applied to the flip-flop circuit for driving the switching element of the non-operating heating coil, As a result, the drive power control unit performs an erroneous operation and outputs an erroneous drive signal to the operating heating coil

Method used

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Experimental program
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Embodiment approach 1

[0069] figure 1 It is a circuit diagram partially modularly showing main parts of the induction heating cooker which is the induction heating device according to Embodiment 1 of the present invention.

[0070] exist figure 1 Among them, the first pot 15 as the first object to be heated is composed of a laminated body using a plurality of magnetic metals or non-magnetic metals, although not shown in particular. Although not shown in particular, the first heating coil 1 is formed in a spiral shape, and is arranged to face the central portion of the bottom surface of the first pot 15 at a certain distance from the bottom surface of the first pot 15 . The first heating coil 1 is composed of a twisted wire bundled with a plurality of copper wires, and the current distribution in the twisted wire is made uniform when a high-frequency current flows.

[0071] The first inverter circuit 2 is constituted by a series circuit of a first resonant capacitor 11 and a first switching elem...

Embodiment approach 2

[0101] Figure 4 It is a block diagram showing main components of an induction heating cooker as an induction heating device according to Embodiment 2 of the present invention. exist Figure 4 In , components and circuit blocks having the same functions as those in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.

[0102] Such as Figure 4 As shown, the induction heating cooker of Embodiment 2 differs from Embodiment 1 in the point which comprises a rice cooker. The specific structure is as follows. The said rice cooker has the main body 32 (indicated by the dotted line) which accommodates the 1st pot 15, and the main body 32 has the cover 30 which covers the opening part of the 1st pot 15. As shown in FIG. In the induction heating cooker of Embodiment 2, it is provided that: there is a metal plate 31 constituting the cover 30 instead of the second pot 16 in Embodiment 1, and the second heating coil 35 is arranged on the edg...

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PUM

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Abstract

The invention provides an induction heating device. The induction heating device inhibits a first synchronous signal generating circuit (3) which detects the resonant voltage of a first heating coil (1) to output a first trigger signal when a second driving voltage that drives a second switch element (14) is output, and inhibits a second synchronous signal generating circuit (7) which detects the resonant voltage of a second heating coil (5) to output a second trigger voltage when a first driving voltage that drives a first switch element (12) is output. Therefore, error driving to the second switch element (14) in action through the first trigger signal generated by the voltage induced in the first heating coil (1) in action halting can be prevented, and furthermore error driving to the first switch element (12) in action through the second trigger signal generated by the voltage induced in the second heating coil (5) in stoppage can be prevented.

Description

technical field [0001] The present invention relates to an induction heating device having a plurality of heating coils, and more particularly to an induction heating cooker used in general households. Background technique [0002] Conventionally, as such an induction heating cooker, for example, there is a rice cooker including two heating coils for inductively heating a pot and a lid. In such a conventional rice cooker, when induction heating is performed by any one of the heating coils, the power supply of the driving circuit that drives the switching element that generates a high-frequency current in the other heating coil is turned off, so that the other heating coil does not operate. The heating coil is not affected by external noise (for example, refer to Patent Document 1). [0003] Figure 5 It is a circuit diagram schematically showing a part of main components of a rice cooker which is a conventional induction heating cooker described in Patent Document 1. FIG. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B6/12
Inventor 能濑纯辉田中靖彦渡部胜行
Owner PANASONIC CORP