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Judging method and judging system for size of electromagnetic oven cooker as well as electromagnetic oven

A technology of pot size and induction cooker, applied in the field of induction cooker, can solve the problems of easy to cause misjudgment, low resolution, low accuracy of judgment results, etc., and achieve the effect of prolonging service life and increasing safety performance.

Active Publication Date: 2017-10-20
DONGGUAN QIANFENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing methods for judging pots all use a single condition as a judgment, resulting in low accuracy of judgment results, low resolution, and easy misjudgment, thereby adversely affecting the life of the induction cooker or pots

Method used

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  • Judging method and judging system for size of electromagnetic oven cooker as well as electromagnetic oven
  • Judging method and judging system for size of electromagnetic oven cooker as well as electromagnetic oven
  • Judging method and judging system for size of electromagnetic oven cooker as well as electromagnetic oven

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for judging the size of an electromagnetic cooker pan, as attached figure 1 As shown, the steps of the judging method include:

[0035] S1. After the induction cooker starts heating, obtain the PWM duty cycle DD of the induction cooker, and judge whether the DD is greater than or equal to the preset value TT, and if so, enter step S2;

[0036] S2. Calculate the current PWM ratio K of the induction cooker, and judge whether the ratio K is greater than or equal to the preset constant value KK, if so, enter step S3, otherwise go to step S5;

[0037] S3. Calculate the current working power P of the induction cooker, and judge whether the power P is less than or equal to the preset constant value PP, if so, go to step S4, otherwise go to step S5;

[0038] S4. Determine that the pot is a small pot, and execute the small pot working procedure;

[0039] S5. Determine that the pot is a large pot, and execute a large pot working procedure.

[0040] As a preferred embo...

Embodiment 2

[0057] Based on the inventive concept of the above-mentioned embodiment 1, this embodiment provides a judging system for the size of an induction cooker pan, as shown in the attached image 3 As shown, the judgment system includes:

[0058] The start judgment module is used to obtain the PWM duty cycle DD of the induction cooker after the induction cooker starts heating, and judge whether the DD is greater than or equal to the preset value TT, and if the judgment result is yes, then open the ratio judgment module; as a preference, When it is determined that the DD is less than the preset value TT, the induction cooker stops heating;

[0059] The ratio judging module is used to calculate the current PWM ratio K of the induction cooker, and judge whether the ratio K is greater than or equal to the preset constant value KK, if so, turn on the second calculation and power judging module, otherwise turn on the cauldron program execution module ;

[0060] The power judging module ...

Embodiment 3

[0067] Based on the inventive concepts of Embodiment 1 and Embodiment 2 above, this embodiment provides an induction cooker, which includes the judging system as described in Embodiment 2.

[0068] In one of the preferred embodiments, the induction cooker includes an AC input module 1, an EMC filter module 4, a first rectification module 5, an LC oscillation module 6, a synchronous sampling module 10 and a main control module 11 connected in sequence. The AC input module 1 is connected to the main control module 11 through the second rectification module 2 and the switching current module 3 in turn, the first rectification module 5 is connected to the main control module 11 through the current sampling module 7, and the second rectification module 2 is connected to the main control module 11 through the voltage sampling module 8, the main control module 11 is connected to the LC oscillation module 6 through the IGBT drive module 9, and the EMC filter module 4 is also connected ...

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Abstract

The invention discloses a judging method and judging system for the size of an electromagnetic oven cooker as well as the electromagnetic oven. The judging method comprises the following steps of: obtaining a PWM duty ratio DD of the electromagnetic oven, judging whether the PWM duty ratio DD is greater than or equal to a preset value TT or not, obtaining a current value C and the PWM duty ratio D if the PWM duty ratio DD is greater than or equal to the preset value TT, calculating a ratio K of unit current to PWM, judging whether the ratio K is greater than or equal to a preset constant value KK, obtaining a voltage value V if the ratio K is greater than or equal to the preset constant value KK, calculating current working power P of the electromagnetic oven, judging whether power P is smaller than or equal to a preset constant value PP, and determining the cooker as a large cooker if the power P is not smaller than or equal to the preset constant value PP; determining the cooker as a small cooker if the power P is smaller than or equal to the constant value PP, and determining the cooker as the large cooker if the power P is not smaller than or equal to the constant value PP. The judging method adopts a plurality of conditions such as PWM duty ratio, sampling current and power to comprehensively judge the size of the cooker, so that the size of a heating cooker can be precisely judged.

Description

technical field [0001] The invention relates to the technical field of induction cooker, in particular to a method for judging the size of an induction cooker pot, a judgment system and an induction cooker. Background technique [0002] In the prior art, the method for judging the size of the cooker for the induction cooker is mainly through current sampling or the number of feedback waveforms after a single resonance. [0003] The method in Chinese patent 201210394618.1 "A Control Circuit and Method for Judging Cookware Material" belongs to this type. When the electromagnetic heating device is working, the control unit controls the IGBT to heat the heating unit; The output pulse signal corresponding to the switch state is given to the MCU of the control unit; the MCU records the input pulse signal, and converts the pulse signal into frequency M; the frequency M is compared with the preset frequency threshold N, when the frequency M is greater than the preset frequency When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C7/08F24C7/00H05B6/06H05B6/12
CPCF24C7/00F24C7/082H05B6/06H05B6/12H05B2206/02Y02B40/00
Inventor 袁灿荣
Owner DONGGUAN QIANFENG ELECTRONICS
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