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Electromagnetic heating cooker and control method and control apparatus therefor

A control method and technology of a control device, which are applied to electric heating devices, induction heating control, induction heating devices, etc., can solve the problems of vibration stop of resonant circuit 3, inversion of comparator E output, heating, etc.

Active Publication Date: 2018-02-16
ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the mains ACV crosses zero in this existing electromagnetic cooker, the voltages collected by points N and P in the synchronous circuit 5 cannot cause the output of the comparator E in the PWM modulation circuit 61 to reverse, so that the IGBT4 cannot be turned on again. , causing the resonant circuit 3 to stop vibrating and heating to stop

Method used

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  • Electromagnetic heating cooker and control method and control apparatus therefor
  • Electromagnetic heating cooker and control method and control apparatus therefor
  • Electromagnetic heating cooker and control method and control apparatus therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The electromagnetic oven of this embodiment includes: a resonant circuit and an IGBT, and the IGBT forms an electromagnetic oscillation circuit together with the resonant circuit and an external power supply (commercial power), thereby generating high-frequency magnetic field changes through the mutual cooperation of the coil disk and the capacitor in the resonant circuit , and then form a magnetic field vortex between the induction cooker and the pot, causing the metal atoms in the pot to vibrate, making the pot heat up, and then achieving the purpose of heating the food.

[0047] figure 2 It is a schematic flowchart of the control method provided in this embodiment. Such as figure 2 As shown, the control method of the present embodiment includes:

[0048] S101. Obtain an input voltage of the external power supply.

[0049] In the actual environment, obtaining the input voltage of the external power supply can be realized through various methods. for example:

...

Embodiment 2

[0074] The electromagnetic oven of this embodiment includes: a resonant circuit and an IGBT, and the IGBT forms an electromagnetic oscillation circuit together with the resonant circuit and an external power supply (commercial power), thereby generating high-frequency magnetic field changes through the mutual cooperation of the coil disk and the capacitor in the resonant circuit , and then form a magnetic field vortex between the induction cooker and the pot, causing the metal atoms in the pot to vibrate, making the pot heat up, and then achieving the purpose of heating the food.

[0075] Figure 4 A schematic structural diagram of the control device 200 provided in this embodiment. Such as Figure 4 As shown, the control device 200 of this embodiment can execute the control method of the first embodiment, which includes: a first sampling module 202 , and a processing module 201 electrically connected to the first sampling module 202 . Wherein, the first processing module 20...

Embodiment 3

[0089] The electromagnetic oven of this embodiment includes: a resonant circuit and an IGBT, the IGBT forms an electromagnetic oscillation circuit together with the resonant circuit and an external power supply (commercial power), thereby generating high-frequency magnetic field changes through the mutual cooperation of the coil disk and the capacitor in the resonant circuit , and then form a magnetic field vortex between the induction cooker and the pot, causing the metal atoms in the pot to vibrate, making the pot heat up, and then achieving the purpose of heating the food.

[0090] Figure 5 A schematic structural diagram of the control device 300 provided in this embodiment. Such as Figure 5 As shown, the control device 300 of this embodiment includes: a memory 302 storing an executable instruction set, and a processor 301 . Wherein, the processor 301 is configured to call the executable instruction set in the memory 302 to execute the control method in the first embodi...

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Abstract

The invention provides an electromagnetic heating cooker and a control method and a control apparatus therefor. The electromagnetic heating cooker comprises a resonance circuit and an IGTB; the resonance circuit, the IGBT and an external power supply form an electromagnetic oscillation circuit; the control method comprises the steps of obtaining the input voltage of the external power supply; andwhen the input voltage is less than a preset threshold value, increasing the width of a PWM pulse signal for controlling on-off of the IGBT. By virtue of the electromagnetic heating cooker and the control method and the control apparatus therefor, oscillation stop of the resonance circuit of the electromagnetic heating cooker can be prevented without needing a timing circuit or a coupling circuit,so that the electromagnetic heating cooker is simple and easy to use, and low in cost.

Description

technical field [0001] The invention relates to an electromagnetic heating cooker, a control method and a control device thereof, and belongs to the technical field of kitchen appliances. Background technique [0002] Heating food by electromagnetic induction is not only clean and hygienic, but also convenient and efficient, so it is used in more and more kitchen appliances, such as induction cooker, rice cooker and hot pot. [0003] figure 1 It is a schematic circuit diagram of an induction cooker in the prior art. Such as figure 1 As shown, the induction cooker includes a bridge rectifier circuit 1 , a filter circuit 2 , a resonant circuit 3 , an IGBT 4 , a synchronous circuit 5 , an MCU 6 , a PWM modulation circuit 61 , and an IGBT drive circuit 7 connected in sequence. After the AC mains ACV passes through the bridge rectifier circuit 1 and the filter circuit 2, a DC voltage is obtained at point A. [0004] In the initial stage, both D point and R point are set to lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06H05B6/12
CPCH05B6/062H05B6/1209
Inventor 周宇杨剑赵礼荣
Owner ZHEJIANG SHAOXING SUPOR DOMESTIC ELECTRICAL APPLIANCE CO LTD
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