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Inductive heating cooker

A technology of induction heating and cooker, applied in induction heating, induction heating device, electric/magnetic/electromagnetic heating, etc., can solve the problem of heating unevenness becoming larger, and achieve the purpose of reducing heating unevenness and restraining the reduction of heating efficiency. Effect

Active Publication Date: 2013-10-09
MITSUBISHI ELECTRIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, there is a problem that the portion of the object to be heated that is placed above the heating coil to which the high-frequency current is not supplied is not heated due to a shift in the position of the object to be heated, and the heating unevenness becomes large.

Method used

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  • Inductive heating cooker
  • Inductive heating cooker
  • Inductive heating cooker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] (structure)

[0033] figure 1 It is a figure which shows the structure of the induction heating cooker of Embodiment 1.

[0034] exist figure 1 Among them, 101 is a top plate, 102 is a main frame, 103 is a circuit for supplying a high-frequency current, 104 is an operation part, 105 is a display unit, and 22 is a heating coil.

[0035] The top plate 101 is used for placing an object to be heated such as a pan, and is provided with a heating port 106 indicating the placement position of the pan. Inside the main body housing 102, the circuit 103, the display unit 105, and the heating coil 22 are housed, and the top plate 101 is covered on the upper surface thereof, and the internal structure of the main body housing 102 is housed.

[0036] circuit 103 has the following figure 2 In the structure described above, a high-frequency current is supplied to the heating coil 22 .

[0037] The operation unit 104 is used for the user to adjust the heating output.

[0038] Th...

Embodiment approach 2

[0184] In Embodiment 2, a mode in which the inverter circuit 9 is configured by a half bridge will be described.

[0185] Figure 13 It is a figure which shows the circuit structure of the induction heating cooker of Embodiment 2.

[0186] Hereinafter, the difference from Embodiment 1 described above will be mainly described. In addition, in Figure 13 , for the above Embodiment 1 ( figure 2 ) with the same structure appended with the same symbol.

[0187] Each inverter circuit 9 ′ in Embodiment 2 has a half-bridge structure, and includes a switching element on the high potential side (upper switch 12 ′), a switching element on the low potential side (lower switch 13 ′), and an upper switch 12 ′. The upper diode 14' connected in antiparallel, and the lower diode 15' connected in antiparallel to the lower switch 13'.

[0188] Between the output points in the respective inverter circuits 9', a load circuit 24' is connected. The load circuit 24' includes a heating coil 22,...

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PUM

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Abstract

During performance of heating operation for applying set power to a heating target, control means 25 controls an inverter circuit 9 to output power corresponding to the set power to a heating coil 22 above which a heating target is placed, on the basis of a determination result by load determining means 26. In the case where the heating target is not placed above the heating coil 22 to which the power corresponding to the set power is being output, the control means 25 controls the inverter circuit 9 to output a specific power that is smaller than or equal to the set power to the heating coil 22.

Description

technical field [0001] The present invention relates to an induction heating cooker provided with a plurality of heating coils. Background technique [0002] Among conventional induction heating cookers, for example, an induction heating cooker has been proposed that includes a load detection unit that detects that an object to be heated is placed on the top plate, and that the load detection unit detects for each of the heating coils An object to be heated is placed above the heating coil, and the circuit supplies a high-frequency current only to the heating coil on which the object to be heated is placed above the load detection means" (for example, refer to Patent Document 1) . [0003] Patent Document 1: Japanese Patent Laid-Open No. 2008-293871 (Claim 2) Contents of the invention [0004] In the technique of the above-mentioned Patent Document 1, by supplying high-frequency current only to the heating coil that detects the object to be heated, it is possible to supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/12
CPCH05B2213/05H05B6/062H05B2213/03
Inventor 野村智竹下美由纪新土井贤
Owner MITSUBISHI ELECTRIC CORP