CN110996420B - Method for calibrating power of electromagnetic heating equipment and electromagnetic heating equipment - Google Patents
Method for calibrating power of electromagnetic heating equipment and electromagnetic heating equipment Download PDFInfo
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- 238000011900 installation process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 8
- 230000005674 electromagnetic induction Effects 0.000 description 4
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
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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
- F24C7/06—Arrangement or mounting of electric heating elements
- F24C7/062—Arrangement or mounting of electric heating elements on stoves
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
- H05B6/129—Cooking devices induction ovens
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Abstract
The application discloses a method for calibrating power of electromagnetic heating equipment and the electromagnetic heating equipment, wherein the method comprises the following steps: determining rated power corresponding to the specified gears and actual current values of actual power of the specified gears when the actual power reaches the rated power; fitting to generate corresponding relations between rated power and actual current values corresponding to each gear according to rated power and actual current values corresponding to a plurality of designated gears; determining rated power corresponding to the current gear; and determining an actual current value corresponding to the current gear according to the corresponding relation and outputting the current value. The full-power range calibration of the induction cooker is realized through software without increasing hardware cost, and individual power difference caused by an installation process is avoided. Compared with the prior art, the accuracy can be improved, and the full-range power calibration of the electromagnetic heating device can be realized. This enables a user to more strictly supply the user with the corresponding power for heating when using the electromagnetic heating device.
Description
Technical Field
The application relates to the field of electromagnetic heating equipment, in particular to a method for calibrating power of electromagnetic heating equipment and the electromagnetic heating equipment.
Background
Electromagnetic heating apparatus refers to apparatus that heats by electromagnetic induction principle, such as electromagnetic oven, electromagnetic induction heater, etc. Electromagnetic heating devices are typically provided with a plurality of gear steps, each corresponding to a different rated power, which a user can select to heat at different powers.
Because the current sampling circuit of the electromagnetic heating equipment generally samples current by a mutual inductor or a constantan wire resistor, errors exist in the conversion of small signals into voltage signals, and the power and the calibration method of the electromagnetic heating equipment cannot meet the requirements of rated power due to factors such as a constantan wire installation process, the working distance of a wire coil whole machine and the like.
In the prior art, the current power calibration of electromagnetic heating equipment is mainly carried out by the following 3 methods:
scheme 1, the present power is calculated by power = voltage x current. Scheme 2, selecting two current test values in the working current range of the electromagnetic heating equipment, so that the electromagnetic heating equipment operates under the conditions of the current test values and zero. Scheme 3, power is adjusted by potentiometer.
However, the following problems still remain in the prior art described above:
for scheme 1, because the sampling circuit and the mounting process have errors, the actual power and the power obtained by voltage and current have a larger difference. For scheme 2, power calibration may be achieved in a certain power region, but may not be met in applications with continuously low power. Aiming at scheme 3, the power calibration of the full power range cannot be realized, and only the accuracy of a certain power can be ensured.
Disclosure of Invention
To solve the above-mentioned problems, the present application proposes a method of calibrating power of an electromagnetic heating device, comprising: determining rated power corresponding to a plurality of designated gears and actual current values of actual power of the designated gears when the rated power is reached; fitting to generate corresponding relations between rated power and actual current values corresponding to each gear according to the rated power and actual current values corresponding to the plurality of designated gears; determining rated power corresponding to the current gear; and determining the actual current value corresponding to the current gear according to the corresponding relation and outputting the actual current value.
In one example, determining the rated power corresponding to the plurality of designated gears, and the actual current value of the actual power of the plurality of designated gears when the rated power is reached, includes: determining rated power corresponding to a plurality of designated gears; adjusting the current value of the electromagnetic heating equipment for each specified gear until the actual power of the specified gear reaches the corresponding rated power; and recording and storing the adjusted current value as an actual current value corresponding to the designated gear.
In one example, according to the rated power and the corresponding actual current value corresponding to the specified gears, the corresponding relation between the rated power and the actual current value corresponding to each gear is generated by fitting, including: dividing a plurality of power ranges according to the rated power corresponding to the specified gears, wherein each power range at least comprises two specified gears; and fitting and generating corresponding relations between rated power and actual current values corresponding to each gear in each power range according to the rated power and actual current values corresponding to a plurality of specified gears in the power range.
In one example, dividing the plurality of power ranges includes: the method comprises dividing a plurality of power ranges by taking the intermediate power as a boundary, wherein when the rated power is not more than the intermediate power and not less than the intermediate power, at least one power range is respectively included, and the intermediate power is 900W-1100W.
In one example, in a power range below the intermediate power, the rated power of the plurality of designated gears includes at least a first gear and a second gear, the first gear being 400-600W and the second gear being 700-900W; alternatively, in the power range above the intermediate power, the rated power of the plurality of specified gear steps includes at least a third gear step and a fourth gear step, the third gear step being 1300-1500W, the fourth gear step being 1800-2000W.
In one example, fitting generates a correspondence between rated power and actual current values corresponding to each gear, including: and generating a linear corresponding relation between the rated power corresponding to each gear and the actual current value by linear fitting.
In one example, the linear correspondence includes: y=ky+m, where Y is an actual current value corresponding to the current gear, Y is a rated power corresponding to the current gear, k is a coefficient, and m is a compensation coefficient determined by a ratio between the rated power corresponding to the specified gears and the corresponding actual current value.
In one example, the linear correspondence includes:wherein D is 1 、D 2 …D n Rated power d corresponding to each of the specified gears 1 、d 2 …d n Respectively corresponding actual current values k of the plurality of designated gears 1 、k 2 …k n To compensate the coefficient, n is not smallA positive integer of 2; wherein the compensation coefficients m and k are determined 1 、k 2 …k n The method of (1) comprises: determining an initial compensation coefficient; determining and outputting an actual current value corresponding to each preset gear in a plurality of preset gears of the electromagnetic heating equipment through the corresponding relation of the initial compensation coefficient applied to each preset gear; determining the actual power of the preset gear when the actual current value is output; and adjusting the initial compensation coefficient to enable the actual power corresponding to the preset gear to be closer to the rated power corresponding to the preset gear.
In one example, the linear correspondence includes:wherein k is 1 ＝k 2 。
In another aspect, the present application also provides an electromagnetic heating apparatus, including a power calibration device, the power calibration device including: the first determining module is used for determining rated power corresponding to the specified gears and actual current values of the actual power of the specified gears when the actual power reaches the rated power; the generation module is used for fitting and generating the corresponding relation between the rated power corresponding to each gear and the actual current value according to the rated power corresponding to the specified gears and the corresponding actual current value; the second determining module is used for determining rated power corresponding to the current gear; and the output module is used for determining the actual current value corresponding to the current gear according to the corresponding relation and outputting the current value.
The power calibration method provided by the application can bring the following beneficial effects:
1. the correspondence between the rated power and the actual current value is fit and generated by a plurality of specified gears, and when any gear is selected, the actual current value to be output can be determined by the correspondence. The full-power range calibration of the induction cooker is realized through software without increasing hardware cost, and individual power difference caused by an installation process is avoided. Compared with the prior art, the accuracy can be improved, and the full-range power calibration of the electromagnetic heating device can be realized. And in some application occasions with continuous low power and the like, the accuracy can be ensured. This enables a user to more strictly supply the user with the corresponding power for heating when using the electromagnetic heating device. For example, when the user uses the induction cooker, the accuracy of the fire can be strictly ensured, and the user experience is improved.
2. Because of objective factors, the correspondence between high power gears and low power gears tends to be widely different. Therefore, by dividing a plurality of power ranges, the high power gear and the low power gear can be respectively corresponding to different corresponding relations, and the accuracy in determining the actual current value can be further improved.
3. By generating the linear corresponding relation by linear fitting, the calculation process during fitting and the complexity of the corresponding relation generated by final fitting can be effectively reduced on the premise of ensuring the accuracy, and the working efficiency of the processing equipment is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a flow chart of a method of calibrating power of an electromagnetic heating device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of manual power calibration in an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating an operation process of the electromagnetic heating apparatus when the power range is divided by 1000W in the embodiment of the present application;
fig. 4 is a schematic block diagram of a power calibration device in an electromagnetic heating apparatus according to an embodiment of the present application.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present application provides a method of calibrating power of an electromagnetic heating device. The electromagnetic heating apparatus refers to an apparatus that performs heating by an electromagnetic induction principle, for example, an induction cooker, an electromagnetic induction heater, or the like. The method comprises the following steps:
s101, determining rated powers corresponding to a plurality of specified gears and actual current values of the actual powers of the specified gears when the rated powers are reached.
In general, the electromagnetic heating device is provided with a plurality of gears, each gear corresponds to different power, and a user can select different gears to heat when using the electromagnetic heating device. For example, when the electromagnetic heating device is an induction cooker, a plurality of gears are arranged on the induction cooker, and a user can select corresponding gears to heat and cook according to the cooking process or the requirements of food materials.
For calibrating the power of the electromagnetic heating apparatus, a plurality of specified gear positions may be selected in advance, and then the rated power corresponding to the plurality of specified gear positions and the actual current value of the plurality of specified gear positions when the rated power is reached are determined. When a plurality of designated gears are selected, the gear can be selected randomly from the gears of the electromagnetic heating equipment, or can be selected according to a certain rule. For example, some gears most commonly used by the user may be selected as the designated gears, or the designated gears may be uniformly selected according to the rated power corresponding to the gears, which is not limited herein.
In general, since the rated power of each gear is preset and known, after a plurality of specified gears are selected, the rated power corresponding to the plurality of specified gears can be known. The actual current values of the actual powers of the plurality of designated gears at the time of reaching the rated power can then be determined from the already known rated power.
Specifically, when determining the actual current value corresponding to the designated gear, the current value may be manually adjusted, or the processing device may automatically adjust the current value until the actual power of the designated gear reaches the rated power, where the current value is the actual current value corresponding to the designated gear. For example, as shown in fig. 2, when the electromagnetic heating device is an induction cooker, the induction cooker can enter a manual power calibration mode through a key arranged on the induction cooker, after a designated gear is selected, the current value is adjusted through a key for adjusting the current on the induction cooker, and then the actual current value obtained through adjustment is stored. Of course, this is only explained by taking manual adjustment of the electromagnetic oven as an example, and the electromagnetic oven is adjusted in other ways, or other electromagnetic heating devices adjust the current value, which will not be described herein.
After the rated power and actual current values for the plurality of designated gears are determined, they may be stored in a charged erasable programmable read-only memory (Electrically Erasable Programmable read only memory, EEPROM) or other type of storage device for subsequent corresponding calculations.
S102, fitting and generating corresponding relations between rated power and actual current values corresponding to the various gears according to the rated power and actual current values corresponding to the various designated gears.
After the rated power and the actual current value corresponding to the specified gears are obtained, the corresponding relation between the rated power and the actual current value of each gear can be generated according to fitting. Fitting refers to connecting a series of points on a plane with a smooth curve. The rated power and the actual current value can be respectively used as the abscissa and the ordinate to establish a coordinate system, points corresponding to the specified gears are then determined in the coordinate system, and the corresponding relation between the rated power and the actual current value is generated in a corresponding fitting mode, and can be expressed in a functional mode.
S103, determining rated power corresponding to the current gear.
S104, determining an actual current value corresponding to the current gear according to the corresponding relation and outputting the actual current value.
After the user adjusts to the current gear, the rated power of the current gear may be determined first. And then, according to the determined corresponding relation, calculating and outputting a corresponding actual current value so that the actual power of the induction cooker can reach or approach to the rated power as much as possible. By bringing the actual power to or as close to the rated power as possible, the accuracy of the device is improved, and the use experience of the user is also improved.
In one embodiment, when the rated power difference between the gear positions is large in the electromagnetic heating apparatus, the degree of change between the correspondence between the rated power and the actual current value is also high between the high power gear position and the low power gear position. At this time, if only one correspondence is used to account for the correspondence of all gear positions, not only the calculation process may be too complicated, but also the correspondence obtained by the final calculation may be too complex, or the accuracy of the correspondence is low. Therefore, the plurality of power ranges may be divided according to the magnitude of rated power of each gear in the electromagnetic heating apparatus, or according to the magnitude of rated power corresponding to a plurality of specified gears selected in advance. In each power range, the rated power difference between the high-power gear and the low-power gear is relatively small, the corresponding relation calculation process is relatively simpler, and the corresponding relation accuracy is relatively high. Of course, in order to be able to fit the corresponding relation, when dividing the power ranges, it is ensured that at least two designated gears exist in each power range. If only one designated gear exists, fitting cannot be performed to generate a corresponding relation; when two designated gears exist, a linear corresponding relation can be generated by fitting; when three or more designated gears exist, a curve correspondence can be generated.
After the power range is divided, the corresponding relation can be generated by fitting according to rated power and actual current values of a plurality of specified gears contained in the power range, and the corresponding relation is not repeated here.
Further, for most household electromagnetic heating devices, the range of rated power at which they operate is not particularly high. For example, the lowest rated power of an induction cooker is typically around 100W, and the highest rated power is typically around 2000W or 2200W. In this case, a plurality of power ranges may be divided by using 1000W as an intermediate power, and when the rated power is not more than 1000W and not less than 1000W, at least one power range is included, and 1000W may be located in any one of the two power ranges. When determining the designated gear, the gear with higher use frequency can be selected according to the use habit of the user. For example, in the induction cooker, the rated power of the plurality of specified gear steps may include at least the first gear step 500W and the second gear step 900W in a power range of 1000W or less, or the rated power of the plurality of specified gear steps may include at least the third gear step 1400W and the fourth gear step 2000W in a power range of 1000W or more. The accuracy of the corresponding relation can be improved by selecting the specified gear of the rated power to fit and generate the corresponding relation.
In one embodiment, the correspondence generated by the fitting may be a linear correspondence generated by a linear fitting. In actual operation, the correspondence relationship is not a linear correspondence relationship due to the existence of the client factor, but is also a generally nearly linear correspondence relationship. At this time, the corresponding relationship can be regarded as a linear corresponding relationship, and the calculation process of calculating the corresponding relationship can be effectively simplified.
Specifically, the linear correspondence relationship may be set to y=ky+m. Wherein Y is an actual current value corresponding to a current gear, Y is rated power corresponding to the current gear, k is a coefficient, the value is determined by the ratio between the rated power corresponding to a plurality of specified gears and the corresponding actual current value, and m is a compensation coefficient.
Further, the linear correspondence may beWherein D is 1 、D 2 …D n Rated power d corresponding to each of a plurality of designated gears 1 、d 2 …d n Actual current values respectively corresponding to a plurality of designated gears，k 1 、k 2 …k n For the compensation coefficient, n is a positive integer not less than 2.
For example, a linear correspondence may be obtained through multiple experiments as follows:wherein k is 1 ＝k 2 。
Wherein, the compensation coefficients m and k can be optimally determined by a plurality of groups of calibration methods 1 、k 2 …k n The specific optimization determination method is as follows:
an initial compensation coefficient is first determined, which may be set according to existing experience.
Then, among a plurality of preset gear positions of the electromagnetic heating device, for each preset gear position, an actual current value corresponding to the preset gear position is determined and output through a corresponding relation of the initial compensation coefficient. The preset gear refers to a preset gear, which may be any gear in the electromagnetic heating device, and is mainly used for auxiliary correction of the initial compensation coefficient. The number of preset gears may be one or more, and in general, the more the number of preset gears is, the more accurate the compensation coefficient is.
And finally, determining the actual power of the preset gear when the actual current value is output, and adjusting an initial compensation coefficient according to the actual power so that the actual power corresponding to the preset gear is closer to the rated power corresponding to the preset gear. The number of times of adjustment may be one or more, and in general, the greater the number of times of adjustment, the higher the accuracy of the correspondence relationship.
In one embodiment, the intermediate power=1000w may be made to be the boundary, dividing two power ranges, 100W to 1000W, and 1000W to 2200W, respectively. After a plurality of designated gears are selected in each power range, linear corresponding relations are generated through linear fitting, and a fitting process is not repeated.
When the electromagnetic heating device is in operation, as shown in fig. 3, the rated power of the current gear can be determined first after the operation is started. And then selecting corresponding relation of corresponding power ranges according to whether the rated power is larger than 1000W. The correspondence here may be a linear correspondence. And then determining the actual current value according to the corresponding relation and outputting the current value, thus completing the corresponding work.
The embodiment of the application also provides electromagnetic heating equipment, which comprises a power calibration device, wherein the power calibration device comprises:
the first determining module 401 determines rated powers corresponding to a plurality of designated gears, and actual current values of actual powers of the designated gears when the rated powers are reached;
the generating module 402 fits and generates corresponding relations between rated power and actual current values corresponding to each gear according to rated power and corresponding actual current values corresponding to the plurality of designated gears;
a second determining module 403, configured to determine a rated power corresponding to the current gear;
and the output module 404 determines an actual current value corresponding to the current gear according to the corresponding relation and outputs the current value.
The foregoing is merely one or more embodiments of the present description and is not intended to limit the present description. Various modifications and alterations to one or more embodiments of this description will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of one or more embodiments of the present description, is intended to be included within the scope of the claims of the present description.
Claims (9)
1. A method of calibrating power of an electromagnetic heating device, comprising:
determining rated power corresponding to a plurality of designated gears and actual current values of actual power of the designated gears when the rated power is reached;
adjusting the current value of the electromagnetic heating equipment for each specified gear until the actual power of the specified gear reaches the corresponding rated power; recording and storing the adjusted current value as an actual current value corresponding to the designated gear;
fitting to generate corresponding relations between rated power and actual current values corresponding to each gear according to the rated power and actual current values corresponding to the plurality of designated gears;
determining rated power corresponding to the current gear;
and determining the actual current value corresponding to the current gear according to the corresponding relation and outputting the actual current value.
2. The method according to claim 1, wherein fitting to generate a correspondence between the rated power and the actual current value corresponding to each gear according to the rated power and the actual current value corresponding to the plurality of specified gears includes:
dividing a plurality of power ranges according to the rated power corresponding to the specified gears, wherein each power range at least comprises two specified gears;
and fitting and generating corresponding relations between rated power and actual current values corresponding to each gear in each power range according to the rated power and actual current values corresponding to a plurality of specified gears in the power range.
3. The method of claim 2, wherein dividing the plurality of power ranges comprises:
the method comprises dividing a plurality of power ranges by taking the intermediate power as a boundary, wherein when the rated power is not more than the intermediate power and not less than the intermediate power, at least one power range is respectively included, and the intermediate power is 900W-1100W.
4. A method according to claim 3, wherein the rated power of the plurality of specified gears includes at least a first gear and a second gear in the power range of not more than the intermediate power, the first gear being 400W-600W and the second gear being 700W-900W; or,
in the power range not smaller than the intermediate power, the rated power of the plurality of specified gear steps includes at least a third gear step and a fourth gear step, the third gear step being 1300W to 1500W, the fourth gear step being 1800W to 2000W.
5. The method of claim 1, wherein fitting the corresponding relationship between the rated power and the actual current value for each gear comprises:
and generating a linear corresponding relation between the rated power corresponding to each gear and the actual current value by linear fitting.
6. The method of claim 5, wherein the linear correspondence comprises:
y=ky+m, where Y is an actual current value corresponding to the current gear, Y is a rated power corresponding to the current gear, k is a coefficient, and m is a compensation coefficient determined by a ratio between the rated power corresponding to the specified gears and the corresponding actual current value.
7. The method of claim 6, wherein the linear correspondence comprises:
wherein D is 1 、D 2 …D n Rated power d corresponding to each of the specified gears 1 、d 2 …d n Respectively corresponding actual current values k of the plurality of designated gears 1 、k 2 …k n N is a positive integer not less than 2;
wherein the compensation coefficient m and the coefficient k are determined 1 、k 2 …k n The method of (1) comprises:
determining an initial compensation coefficient;
determining and outputting an actual current value corresponding to each preset gear in a plurality of preset gears of the electromagnetic heating equipment through the corresponding relation of the initial compensation coefficient applied to each preset gear;
determining the actual power of the preset gear when the actual current value is output;
and adjusting the initial compensation coefficient to enable the actual power corresponding to the preset gear to be closer to the rated power corresponding to the preset gear than the actual power corresponding to the preset gear before adjustment.
8. The method of claim 7, wherein the linear correspondence comprises:
wherein k is 1 ＝k 2 。
9. An electromagnetic heating apparatus, characterized in that the electromagnetic heating apparatus comprises a power calibration device comprising:
the first determining module is used for determining rated power corresponding to the specified gears and actual current values of the actual power of the specified gears when the actual power reaches the rated power; adjusting the current value of the electromagnetic heating equipment for each specified gear until the actual power of the specified gear reaches the corresponding rated power;
recording and storing the adjusted current value as an actual current value corresponding to the designated gear;
the generation module is used for fitting and generating the corresponding relation between the rated power corresponding to each gear and the actual current value according to the rated power corresponding to the specified gears and the corresponding actual current value;
the second determining module is used for determining rated power corresponding to the current gear;
and the output module is used for determining the actual current value corresponding to the current gear according to the corresponding relation and outputting the current value.
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| CN109519984A (en) * | 2017-09-18 | 2019-03-26 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic oven and its Poewr control method, power control device and storage medium |
| CN109699095A (en) * | 2017-10-23 | 2019-04-30 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus and its method for heating and controlling and device |
| CN109842968A (en) * | 2017-11-29 | 2019-06-04 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its method for heating and controlling, control device |
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