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Induction heating cooker

A technology of induction heating and cooking equipment, which is applied in induction heating, induction heating control, induction heating devices, etc., can solve the problems of inability to cook comfortably, difficulty in accurately feeding back the input current value, etc., and achieve the effect of comfortable cooking

Active Publication Date: 2013-11-27
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in the conventional induction heating cooker, there is a problem that it is difficult to accurately feed back the input current value, and the user of the induction heating cooker cannot cook comfortably due to the deviation of the input power generated when using the induction heating cooker.

Method used

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Examples

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Effect test

Embodiment approach 1

[0045] figure 1 It is a figure which shows the circuit structure of the induction heating cooker which concerns on Embodiment 1 of this invention.

[0046] (1.1. Structure of induction heating cooker)

[0047] figure 1 The induction heating cooker 20 according to Embodiment 1 shown includes: an AC power supply 1 ; a rectification circuit 2 which rectifies the AC power supply 1 ; and a smoothing capacitor 3 which smoothes the output of the rectification circuit 2 . In addition, the induction heating cooker 20 of Embodiment 1 includes: a first inverter 11a and a second inverter 11b that convert the output of the smoothing capacitor 3 into high-frequency power; and a first heating coil 4a and a second heating coil 4a. The coils 4b are connected to the respective inverters, and are supplied with high-frequency current from the respective inverters. In addition, the induction heating cooker 20 of Embodiment 1 includes: an input current detection circuit 8 that detects the curr...

Embodiment approach 2

[0077] Next, an induction heating cooker according to Embodiment 2 of the present invention will be described. First, the induction heating cooker of Embodiment 2 has the same figure 1 The induction heating cooker of Embodiment 1 shown has the same circuit structure. However, the induction heating cooker according to Embodiment 2 differs from the induction heating cooker according to Embodiment 1 in terms of the control content of the control unit 10 . The following description will focus on differences in control content of the control unit 10 .

[0078] Figure 4 It is an operation signal diagram of the inverter during independent heating in the induction heating cooker 20 according to Embodiment 2 of the present invention, and especially shows the operation timing of the inverter when the first heating coil 4a is operated alone.

[0079] exist Figure 4 middle, Figure 4 (A) represents the driving signal of the first switching element 6a, Figure 4 (B) shows the driv...

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Abstract

A conventional induction heating cooker which operates two inverters at the same time, with only one input current detecting circuit provided, cannot measure each of input currents to each of the plurality of inverters, and cannot control input powers by feedback control on input currents. In the induction heating cooker which has a plurality of inverters, when the input power varies to the inverter which has less input power supplied, the variation hardly influences the cooking. The induction heating cooker according to the present invention fixes the operating frequency for the inverter which has less input power supplied and performs the feedback control of the input current for the inverter which has bigger input power supplied.

Description

technical field [0001] The present invention relates to an induction heating cooker which operates a plurality of inverters simultaneously. Background technique [0002] Conventionally, as an induction heating cooker that operates a plurality of inverters simultaneously, for example, the induction heating cooker disclosed in Patent Document 1 can be cited. [0003] Figure 7 It is a figure which shows the circuit structure of the induction heating cooker described in patent document 1, Figure 8 It is the working signal diagram of the inverter in this induction heating cooker. [0004] like Figure 7 As shown, the induction heating cooker described in Patent Document 1 is composed of the following parts: an AC power supply 101; a first heating coil 102 and a second heating coil 103; a rectifying circuit 104 for rectifying the AC power supply 101; smoothing capacitor 105 for smoothing; the first heating coil 102 and the second heating coil 103; The inverter 106 and the sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/12
CPCH05B6/065H05B6/08
Inventor 矶田惠子藤井裕二泽田大辅
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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