Empty pot detection method for induction cooker

A detection method and technology of an induction cooker, which are applied to household stoves/stoves, electric heating fuels, household heating, etc., can solve problems such as easily damaged cooking utensils, temperature sensor lag in temperature sensing, hidden dangers, etc., and achieve an improved use safety. Effect

Active Publication Date: 2018-10-26
SHANGHAI CHUNMI ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the induction cooker products on the market generally have a pot detection, so as to ensure that the induction cooker can only be heated when a pot is placed on it. However, if there is a pot on the induction cooker, but whether there is food in the pot, it is currently impossible to detect
The temperature hysteresis of the temperatu

Method used

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  • Empty pot detection method for induction cooker
  • Empty pot detection method for induction cooker
  • Empty pot detection method for induction cooker

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048] Example one

[0049] A long time period of 12s after the induction cooker is started is regarded as the detection stage, and the detection stage is the normal heating stage of the induction cooker.

[0050] In the time period of the detection stage 12s, the controller of the induction cooker controls the heating device of the induction cooker to quantitatively heat the inner pot, and the quantitative heat is 400Wh.

[0051] In the initial stage of the detection phase, it is given by a rectangular heating pulse, which is turned on for 3s and outputs 400W, such as figure 2 Shown.

[0052] In the time period of the detection phase 12s, the temperature detection device in the induction cooker measures the temperature of the inner pot in real time, and feeds back the above temperature value to the controller of the induction cooker.

[0053] The controller of the induction cooker first obtains the temperature point value T0 when the inner pot starts to heat, and then obtains the high...

Example Embodiment

[0055] Example two

[0056] A long time period of 12s after the induction cooker is started is regarded as the detection stage, and the detection stage is the normal heating stage of the induction cooker.

[0057] In the time period of the detection stage 12s, the controller of the induction cooker controls the heating device of the induction cooker to quantitatively heat the inner pot, and the quantitative heat is 400Wh.

[0058] In the detection phase, it is given by two rectangular heating pulses. The rectangular heating pulse is turned on for 3s and outputs 200W, and the two rectangular heating pulses output 400W, such as image 3 Shown.

[0059] In the time period of the detection phase 12s, the temperature detection device in the induction cooker measures the temperature of the inner pot in real time, and feeds back the above temperature value to the controller of the induction cooker.

[0060] The controller of the induction cooker first obtains the temperature point value T0 whe...

Example Embodiment

[0062] Example three

[0063] A long time period of 12s after the induction cooker is started is regarded as the detection stage, and the detection stage is followed by the normal heating stage of the induction cooker.

[0064] In the time period of the detection stage 12s, the controller of the induction cooker controls the heating device of the induction cooker to quantitatively heat the inner pot, and the quantitative heat is 400Wh.

[0065] In the detection phase, the quantitative heat is given in the form of continuous low power, the output time is 12s, the total output is 400W, such as Figure 4 Shown.

[0066] In the time period of the detection phase 12s, the temperature detection device in the induction cooker measures the temperature of the inner pot in real time, and feeds back the above temperature value to the controller of the induction cooker.

[0067] The controller of the induction cooker first obtains the temperature point value T0 when the inner pot starts to heat, an...

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Abstract

The invention discloses an empty pot detection method for an induction cooker. The empty pot detection method comprises the steps of presetting a detection stage duration, applying a quantitative heatto an inner pot, real-time detecting the inner pot temperature by a temperature detecting device, processing the temperature detected in real time, and judging the temperature result after the treatment and feeding back to a control circuit whether food is in the inner pot or not. The empty pot detection method increases the detection stage of the presence or absence of the food in the inner potin normal heating stage of the induction cooker, and realizes the detection of the presence or absence of the food in the inner pot. According to the situation that the temperature rises differently according to the absence or presence food in the pot, the quantitative heat is applied during the detection stage, a temperature rise value is extracted, and the temperature rise value is compared withthe detection threshold value to determine whether the food is in the inner pot or not. The empty pot detection method can effectively detect the presence or absence of the food, ensures cooking utensil not to be damaged and improves the use security.

Description

technical field [0001] The invention belongs to the field of electromagnetic heating and electromagnetic ovens, and in particular relates to a method for detecting an empty pan of an electromagnetic oven. Background technique [0002] Induction cooker, also known as electromagnetic cooker, uses alternating current to pass through the coil to generate an alternating magnetic field whose direction is constantly changing. Eddy current will appear inside the conductor in the alternating magnetic field, and the Joule heating effect of the eddy current will heat up the conductor, thereby Achieve heating. [0003] The induction cooker usually includes the following components, the panel used to carry the pot, the high-voltage main substrate forming the main current circuit, the low-voltage main substrate used for computer control functions, the LED circuit board for displaying working status and transmitting operation instructions, and the high-frequency alternating current circuit...

Claims

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Application Information

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IPC IPC(8): F24C7/08
CPCF24C7/081
Inventor 杨华董远
Owner SHANGHAI CHUNMI ELECTRONICS TECH CO LTD
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