CN108709204A - A kind of empty pot detection method of electromagnetic oven - Google Patents
A kind of empty pot detection method of electromagnetic oven Download PDFInfo
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- CN108709204A CN108709204A CN201810601348.4A CN201810601348A CN108709204A CN 108709204 A CN108709204 A CN 108709204A CN 201810601348 A CN201810601348 A CN 201810601348A CN 108709204 A CN108709204 A CN 108709204A
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- pot
- electromagnetic oven
- detection
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/081—Arrangement or mounting of control or safety devices on stoves
Abstract
The invention discloses a kind of empty pot detection methods of electromagnetic oven, include the following steps：Default detection-phase duration, inside pot apply quantitative heat, be measured in real time by the internal pot temperature of temperature-detecting device, handled the temperature detected in real time, will treated that temperature results are judged, whether have food materials in pot into control circuit feedback.Whether there is or not the detection-phases of food in the normal heating phases of electromagnetic oven increase interior pot by the present invention, realize that whether there is or not foods to be detected in internal pot, according to no food in pot and there is food, the different situation of temperature rise applies quantitative heat, and Extracting temperature rising value in detection-phase, temperature rise value and detection critical value comparison are obtained into the conclusion whether there is or not food, the present invention can ensure that cooking apparatus will not damage, improve safety in utilization to whether there is or not foods effectively to be detected.
Description
Technical field
The invention belongs to electromagnetic heating electromagnetic oven fields, and in particular to a kind of empty pot detection method of electromagnetic oven.
Background technology
Electromagnetic oven is also known as electromagnetic stove, and the changing alternating magnetic field in direction is generated by coil using alternating current,
The inside of conductor in alternating magnetic field will will appear vortex current, and the joule heating effect of vortex current makes conductor heat up, from
And realize heating.
Electromagnetic oven generally includes following component, for carrying the panel of cookware, constituting the main base of high pressure of main current loop
Plate, the low pressure main substrate for computer control function, display working condition and transmission operational order LED circuit board hand over high frequency
Time-dependent current is converted into the coil panel of alternating magnetic field, controlled by low current signal high current break-make IGBT, by AC power
It is converted to the bridge rectifier block of DC power supply, heat signal is transmitted to the temperature controller component etc. of control circuit.
In view of the above-mentioned principle of electromagnetic oven, and have heating speed fast, energy conservation and environmental protection, easy cleaning, accurate temperature controller etc.
Plurality of advantages and receive masses and like.
Currently, electromagnetic oven product in the market, generally whether there is or not pot detections, to ensure that electromagnetic oven only places pot on it
When can heat, still, if having pot on electromagnetic oven, but pot in either with or without food, be currently that cannot achieve detection.Temperature passes
The hysteresis quality of sensor temperature-sensitive also leads to not judge whether there is food in pot using the slope of temperature rise.For electromagnetic oven
For product, if without food in pot, normal heating at the very start, it is easy to damage cooking apparatus；It there will be severe
Heat phenomenon on fire, causes great security risk.
Invention content
The present invention proposes that the purpose is to provide a kind of empty pot detection of electromagnetic oven in order to solve the problems existing in the prior art
Method.
The technical scheme is that：A kind of empty pot detection method of electromagnetic oven, includes the following steps：
I presets detection-phase duration
The inside pots of II apply quantitative heat
III is measured in real time by the internal pot temperature of temperature-detecting device
IV handles the temperature detected in real time
By treated, temperature results judge V
Whether VI has food materials into control circuit feedback in pot.
The step I detailed process is as follows：The time period t of a timing length after electromagnetic oven is started is as detection rank
Section, detection-phase are the normal heating phases of electromagnetic oven later.
The step II detailed process is as follows：In the time period t of detection-phase, electricity is controlled by the controller of electromagnetic oven
The inside pot of heating device of magnetic stove carries out quantitative heating.
The step III detailed process is as follows：In the time period t of detection-phase, the temperature-detecting device in electromagnetic oven is real
When measure in pot temperature, and above-mentioned temperature value is fed back to the controller of electromagnetic oven.
The step IV detailed process is as follows：The controller of electromagnetic oven obtains temperature point value when interior pot is begun to warm up first
Then T0 is obtained in the time period t of detection-phase, the maximum temperature point value T1 of interior pot, and calculates temperature rise value △ T, i.e.,
△T =T1-T0。
The step V detailed process is as follows：Temperature rise value in step IV is faced with the detection in device for controlling electromagnetic field oven
Dividing value T is compared, if △ T are less than T, has food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than
Equal to T, then acousto-optic hint is sent out to user in interior pot without food, device for controlling electromagnetic field oven.
The inside pot applies the method for quantifying heat：In the starting stage of detection-phase, heated by a rectangle
Pulse provides.
The inside pot applies the method for quantifying heat：In detection-phase, quantitative heat is equally divided into several squares
Shape heating pulse, several rectangle heating pulses are provided in the form of interval.
The inside pot applies the method for quantifying heat：In detection-phase, quantitative heat is with lasting low-power shape
Formula provides.
The inside pot applies the method for quantifying heat：In detection-phase, quantitative heat is added with the several of inequality
Thermal pulse provides.
Whether there is or not the detection-phases of food in the normal heating phases of electromagnetic oven increase interior pot by the present invention, realize internal pot
In whether there is or not foods to be detected, according to no food in pot and thering is food, the different situation of temperature rise to be applied in detection-phase
It reorders calorimetric amount, and Extracting temperature rising value, temperature rise value and detection critical value comparison is obtained into the conclusion whether there is or not food, this
Invention can ensure that cooking apparatus will not damage, improve safety in utilization to whether there is or not foods effectively to be detected.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the schematic diagram that embodiment one applies quantitative heat in the present invention；
Fig. 3 is the schematic diagram that embodiment two applies quantitative heat in the present invention；
Fig. 4 is the schematic diagram that embodiment three applies quantitative heat in the present invention；
Fig. 5 is the schematic diagram that example IV applies quantitative heat in the present invention.
Specific implementation mode
Hereinafter, with reference to drawings and examples, the present invention is described in detail：
As shown in Fig. 1 ~ 5, a kind of empty pot detection method of electromagnetic oven includes the following steps：
I presets detection-phase duration S1
The inside pots of II apply quantitative heat S2
III is measured in real time S3 by the internal pot temperature of temperature-detecting device
IV carries out processing S4 to the temperature detected in real time
By treated, temperature results carry out judgement S5 to V
Whether VI has food materials S6 into control circuit feedback in pot.
The step I detailed process is as follows：The time period t of a timing length after electromagnetic oven is started is as detection rank
Section, detection-phase are the normal heating phases of electromagnetic oven later.
The step II detailed process is as follows：In the time period t of detection-phase, electricity is controlled by the controller of electromagnetic oven
The inside pot of heating device of magnetic stove carries out quantitative heating.
The step III detailed process is as follows：In the time period t of detection-phase, the temperature-detecting device in electromagnetic oven is real
When measure in pot temperature, and above-mentioned temperature value is fed back to the controller of electromagnetic oven.
The step IV detailed process is as follows：The controller of electromagnetic oven obtains temperature point value when interior pot is begun to warm up first
Then T0 is obtained in the time period t of detection-phase, the maximum temperature point value T1 of interior pot, and calculates temperature rise value △ T, i.e.,
△T =T1-T0。
The step V detailed process is as follows：Temperature rise value in step IV is faced with the detection in device for controlling electromagnetic field oven
Dividing value T is compared, if △ T are less than T, has food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than
Equal to T, then acousto-optic hint is sent out to user in interior pot without food, device for controlling electromagnetic field oven.
The inside pot applies the method for quantifying heat：In the starting stage of detection-phase, heated by a rectangle
Pulse provides.
The inside pot applies the method for quantifying heat：In detection-phase, quantitative heat is equally divided into several squares
Shape heating pulse, several rectangle heating pulses are provided in the form of interval.
The inside pot applies the method for quantifying heat：In detection-phase, quantitative heat is with lasting low-power shape
Formula provides.
The inside pot applies the method for quantifying heat：In detection-phase, quantitative heat is added with the several of inequality
Thermal pulse provides.
The time period t of the detection-phase is 10s ~ 120s.
The quantitative heat Q is between 0.1Wh ~ 1Wh.
Embodiment one
The period 12s of a timing length after electromagnetic oven is started is later electromagnetic oven as detection-phase, detection-phase
Normal heating phases.
In the period 12s of detection-phase, the inside pot of heating device of electromagnetic oven is controlled by the controller of electromagnetic oven
Quantitative heating is carried out, quantitative heat is 400Wh.
It in the starting stage of detection-phase, is provided by a rectangle heating pulse, the rectangle heating pulse is open-minded
3s exports 400W, as shown in Figure 2.
In the period 12s of detection-phase, the temperature-detecting device in electromagnetic oven measures the temperature of interior pot in real time, and will
Above-mentioned temperature value feeds back to the controller of electromagnetic oven.
The controller of electromagnetic oven obtains temperature point value T0 when interior pot is begun to warm up first, then obtains in detection-phase
In time period t, the maximum temperature point value T1 of interior pot, and calculate temperature rise value △ T, i.e. △ T=T1-T0.
Temperature rise value and detection critical value T=5 DEG C in device for controlling electromagnetic field oven are compared, if △ T are less than 5
DEG C, then there are food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than or equal to 5 DEG C, without food, electricity in interior pot
Magnetic furnace controller sends out acousto-optic hint to user.
Embodiment two
The period 12s of a timing length after electromagnetic oven is started is later electromagnetic oven as detection-phase, detection-phase
Normal heating phases.
In the period 12s of detection-phase, the inside pot of heating device of electromagnetic oven is controlled by the controller of electromagnetic oven
Quantitative heating is carried out, quantitative heat is 400Wh.
It in detection-phase, is provided by two rectangle heating pulses, the rectangle heating pulse is to open 3s outputs
200W, two rectangle heating pulses export 400W, as shown in Figure 3.
In the period 12s of detection-phase, the temperature-detecting device in electromagnetic oven measures the temperature of interior pot in real time, and will
Above-mentioned temperature value feeds back to the controller of electromagnetic oven.
The controller of electromagnetic oven obtains temperature point value T0 when interior pot is begun to warm up first, then obtains in detection-phase
In time period t, the maximum temperature point value T1 of interior pot, and calculate temperature rise value △ T, i.e. △ T=T1-T0.
Temperature rise value and detection critical value T=5 DEG C in device for controlling electromagnetic field oven are compared, if △ T are less than 5
DEG C, then there are food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than or equal to 5 DEG C, without food, electricity in interior pot
Magnetic furnace controller sends out acousto-optic hint to user.
Embodiment three
The period 12s of a timing length after electromagnetic oven is started is later electromagnetic oven as detection-phase, detection-phase
Normal heating phases.
In the period 12s of detection-phase, the inside pot of heating device of electromagnetic oven is controlled by the controller of electromagnetic oven
Quantitative heating is carried out, quantitative heat is 400Wh.
In detection-phase, quantitative heat is provided in the form of lasting low-power, and output time is that 12s always exports 400W,
As shown in Figure 4.
In the period 12s of detection-phase, the temperature-detecting device in electromagnetic oven measures the temperature of interior pot in real time, and will
Above-mentioned temperature value feeds back to the controller of electromagnetic oven.
The controller of electromagnetic oven obtains temperature point value T0 when interior pot is begun to warm up first, then obtains in detection-phase
In time period t, the maximum temperature point value T1 of interior pot, and calculate temperature rise value △ T, i.e. △ T=T1-T0.
Temperature rise value and detection critical value T=5 DEG C in device for controlling electromagnetic field oven are compared, if △ T are less than 5
DEG C, then there are food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than or equal to 5 DEG C, without food, electricity in interior pot
Magnetic furnace controller sends out acousto-optic hint to user.
Example IV
The period 12s of a timing length after electromagnetic oven is started is later electromagnetic oven as detection-phase, detection-phase
Normal heating phases.
In the period 12s of detection-phase, the inside pot of heating device of electromagnetic oven is controlled by the controller of electromagnetic oven
Quantitative heating is carried out, quantitative heat is 400Wh.
In detection-phase, quantitative heat is provided with several heating pulses of inequality, and the rectangle heating pulse is two
It is a, it respectively opens 5s output 240W and opens 3 seconds output 160W, two rectangle heating pulses export 400W, as shown in Figure 5.
In the period 12s of detection-phase, the temperature-detecting device in electromagnetic oven measures the temperature of interior pot in real time, and will
Above-mentioned temperature value feeds back to the controller of electromagnetic oven.
The controller of electromagnetic oven obtains temperature point value T0 when interior pot is begun to warm up first, then obtains in detection-phase
In time period t, the maximum temperature point value T1 of interior pot, and calculate temperature rise value △ T, i.e. △ T=T1-T0.
Temperature rise value and detection critical value T=5 DEG C in device for controlling electromagnetic field oven are compared, if △ T are less than 5
DEG C, then there are food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than or equal to 5 DEG C, without food, electricity in interior pot
Magnetic furnace controller sends out acousto-optic hint to user.
Including the quantitative heat within the safe tolerance range of pot.
Whether there is or not the detection-phases of food in the normal heating phases of electromagnetic oven increase interior pot by the present invention, realize internal pot
In whether there is or not foods to be detected, according to no food in pot and thering is food, the different situation of temperature rise to be applied in detection-phase
It reorders calorimetric amount, and Extracting temperature rising value, temperature rise value and detection critical value comparison is obtained into the conclusion whether there is or not food, this
Invention can ensure that cooking apparatus will not damage, improve safety in utilization to whether there is or not foods effectively to be detected.
Claims (10)
1. a kind of empty pot detection method of electromagnetic oven, it is characterised in that：Include the following steps：
（ⅰ）Default detection-phase duration
（ⅱ）Inside pot applies quantitative heat
（ⅲ）It is measured in real time by the internal pot temperature of temperature-detecting device
（ⅳ）The temperature detected in real time is handled
（ⅴ）By treated, temperature results judge
（ⅵ）Whether there are food materials in pot into control circuit feedback.
2. a kind of empty pot detection method of electromagnetic oven according to claim 1, it is characterised in that：The step（ⅰ）Specifically
Process is as follows：For the time period t of a timing length after electromagnetic oven is started as detection-phase, detection-phase is electromagnetic oven later
Normal heating phases.
3. a kind of empty pot detection method of electromagnetic oven according to claim 2, it is characterised in that：The step（ⅱ）Specifically
Process is as follows：In the time period t of detection-phase, by the controller of electromagnetic oven control the inside pot of heating device of electromagnetic oven into
Row quantitative heating.
4. a kind of empty pot detection method of electromagnetic oven according to claim 3, it is characterised in that：The step（ⅲ）Specifically
Process is as follows：In the time period t of detection-phase, the temperature-detecting device in electromagnetic oven measures the temperature of interior pot in real time, and will
Above-mentioned temperature value feeds back to the controller of electromagnetic oven.
5. a kind of empty pot detection method of electromagnetic oven according to claim 4, it is characterised in that：The step（ⅳ）Specifically
Process is as follows：The controller of electromagnetic oven obtains temperature point value T0 when interior pot is begun to warm up first, then obtains in detection-phase
Time period t in, the maximum temperature point value T1 of interior pot, and calculate temperature rise value △ T, i.e. △ T=T1-T0.
6. a kind of empty pot detection method of electromagnetic oven according to claim 5, it is characterised in that：The step（ⅴ）Specifically
Process is as follows：By step（ⅳ）In temperature rise value be compared with the detection critical value T in device for controlling electromagnetic field oven, if △
T is less than T, then has food, electromagnetic oven to carry out normal heating phases in interior pot；If △ T are more than or equal to T, without food in interior pot,
Device for controlling electromagnetic field oven sends out acousto-optic hint to user.
7. a kind of empty pot detection method of electromagnetic oven according to claim 3, it is characterised in that：It is fixed that the inside pot applies
The method of calorimetric amount is：In the starting stage of detection-phase, provided by a rectangle heating pulse.
8. a kind of empty pot detection method of electromagnetic oven according to claim 3, it is characterised in that：It is fixed that the inside pot applies
The method of calorimetric amount is：In detection-phase, quantitative heat is equally divided into several rectangle heating pulses, several rectangles heat arteries and veins
Punching is provided in the form of interval.
9. a kind of empty pot detection method of electromagnetic oven according to claim 3, it is characterised in that：It is fixed that the inside pot applies
The method of calorimetric amount is：In detection-phase, quantitative heat is provided in the form of lasting low-power.
10. a kind of empty pot detection method of electromagnetic oven according to claim 3, it is characterised in that：The inside pot applies
Quantitatively the method for heat is：In detection-phase, quantitative heat is provided with several heating pulses of inequality.
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| CN201810601348.4A CN108709204B (en) | 2018-06-12 | 2018-06-12 | Empty pot detection method for induction cooker |
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|---|---|---|---|
| CN201810601348.4A CN108709204B (en) | 2018-06-12 | 2018-06-12 | Empty pot detection method for induction cooker |
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Cited By (2)
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| CN110657460A (en) * | 2019-09-20 | 2020-01-07 | 浙江帅丰电器股份有限公司 | Kitchen safety assistance, screen-off control and health reminding system and working method |
| CN111059584A (en) * | 2019-12-31 | 2020-04-24 | 广东威特真空电子制造有限公司 | No-load detection method, microwave cooking apparatus, and computer-readable storage medium |
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| CN108709204B (en) | 2020-12-01 |
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Address after: Room 01-04, 1st floor, No.2 Lane 60, Naxian Road, Pudong New Area pilot Free Trade Zone, Shanghai 201203 Patentee after: Chunmi Technology (Shanghai) Co.,Ltd. Address before: Room 01-04, 1st floor, Lane 60, Naxian Road, Pudong New Area, Shanghai, 201203 Patentee before: SHANGHAI CHUNMI ELECTRONICS TECHNOLOGY Co.,Ltd. |