CN117412422A - Control method for heating device and heating device - Google Patents
Control method for heating device and heating device Download PDFInfo
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- CN117412422A CN117412422A CN202210800514.XA CN202210800514A CN117412422A CN 117412422 A CN117412422 A CN 117412422A CN 202210800514 A CN202210800514 A CN 202210800514A CN 117412422 A CN117412422 A CN 117412422A
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- heating
- wave generating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000001276 controlling effect Effects 0.000 claims description 25
- 230000000875 corresponding effect Effects 0.000 claims description 23
- 230000002596 correlated effect Effects 0.000 claims description 4
- 238000010257 thawing Methods 0.000 description 12
- 235000013305 food Nutrition 0.000 description 10
- 230000000007 visual effect Effects 0.000 description 10
- 230000001186 cumulative effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/005—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment
- A23L3/01—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment using microwaves or dielectric heating
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/365—Thawing subsequent to freezing
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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
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
-
- 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
-
- 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
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
-
- 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
Abstract
The invention provides a control method for a heating device and the heating device. The control method comprises the following steps: controlling the electromagnetic wave generating system to generate electromagnetic waves so as to heat the object to be treated; if the preset frequency modulation condition is met, suspending the heating step of the object to be treated, controlling the electromagnetic wave generating system to adjust the frequency so as to meet the preset matching condition, correcting the frequency of the electromagnetic wave in the heating step of the object to be treated to the frequency meeting the preset matching condition, and continuing the heating step of the object to be treated; and if any one of the heating termination conditions is met, controlling the electromagnetic wave generation system to stop working. Wherein the heating termination condition includes at least two of the following conditions: counting down the remaining heating time; the accumulated frequency difference of frequency adjustment of the preset times is smaller than a termination frequency difference threshold value; when the frequency is the minimum value of the alternative frequency range, continuing to work for the preset continuous heating time; in the case of a frequency that is the minimum of the alternative frequency range, the reflection parameter is greater than a preset end reflection threshold.
Description
Technical Field
The invention relates to the field of food processing, in particular to a control method for an electromagnetic wave heating device and the heating device.
Background
The quality of the food is maintained during freezing, however frozen food requires thawing prior to processing or consumption. In order to improve the thawing efficiency and to ensure the thawing quality, food is usually thawed by an electromagnetic wave heating device.
However, how to properly control the thawing stop is a technical problem that the skilled person wants to solve because the thawing efficiency of electromagnetic waves is fast: if the total thawing time is longer, serious excessive thawing can be caused, and the quality of food is degraded; the total thawing time is short, which may result in serious incomplete thawing and even secondary thawing of the food, which affects the subsequent processing of the user.
Disclosure of Invention
It is an object of the first aspect of the present invention to overcome at least one technical disadvantage of the prior art and to provide a control method for a heating device.
A further object of the first aspect of the invention is to terminate the heating in good time.
It is a further object of the first aspect of the invention to increase the energy efficiency ratio of the heating device.
An object of the second aspect of the present invention is to provide an electromagnetic wave heating apparatus.
According to a first aspect of the present invention, there is provided a control method for a heating apparatus including a chamber for placing an object to be treated, and an electromagnetic wave generating system for generating electromagnetic waves in the chamber to heat the object to be treated, wherein the control method includes:
heating the object to be treated: controlling the electromagnetic wave generating system to generate electromagnetic waves so as to heat the object to be treated;
frequency matching: if the preset frequency modulation condition is met, suspending the heating step of the object to be treated, controlling the electromagnetic wave generating system to adjust the frequency of electromagnetic waves generated by the electromagnetic wave generating system so as to meet the preset matching condition, correcting the frequency of the electromagnetic waves in the heating step of the object to be treated to the frequency meeting the preset matching condition, and continuing the heating step of the object to be treated;
terminating the heating step: if any one of the heating termination conditions is met, controlling the electromagnetic wave generation system to stop working; wherein the heating termination condition includes at least two of the following conditions:
counting down the remaining heating time;
the accumulated frequency difference of frequency adjustment of the preset times in the frequency matching step is smaller than a termination frequency difference threshold;
the electromagnetic wave generating system works for a preset continuous heating time under the condition that the frequency of the electromagnetic wave is the minimum value of a preset alternative frequency range;
the electromagnetic wave generating system is characterized in that under the condition that the frequency of the electromagnetic wave is the minimum value of a preset alternative frequency range, the reflection parameter of the electromagnetic wave generating system is larger than a preset termination reflection threshold value.
Optionally, before the heating step of the object to be treated, the method further comprises:
an initial frequency determining step: and determining the frequency with the minimum reflection parameter from the alternative frequency range as the initial frequency of the heating step of the object to be processed.
Optionally, the control method further includes:
a remaining time determining step: determining the remaining heating time according to the initial frequency; wherein,
the remaining heating time is inversely related to the initial frequency.
Optionally, the control method further includes:
a frequency difference threshold determining step: determining the frequency difference threshold according to the initial frequency; wherein,
the frequency difference threshold is positively correlated with the initial frequency.
Optionally, the initial frequency determining step further includes:
a reference frequency determining step: controlling the electromagnetic wave generation system to adjust the frequency of electromagnetic waves generated by the electromagnetic wave generation system in a preset alternative frequency range according to a preset first step length, and determining a reference frequency according to the reflection parameter;
an optimal frequency determining step: controlling the electromagnetic wave generation system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generation system in a carefully selected frequency range according to a preset second step length, and determining the frequency with the minimum reflection parameter as the initial frequency; wherein,
the selected frequency range is a frequency within a range having the absolute value of the first step as a radius based on the reference frequency;
the absolute value of the second step is smaller than the absolute value of the first step; and is also provided with
In the frequency matching step, the electromagnetic wave generating system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system according to the second step length.
Optionally, in the reference frequency determining step, controlling the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system to a frequency that the reflection parameter is smaller than a preset first reflection threshold value, and determining the frequency that the reflection parameter is smaller than the first reflection threshold value as the reference frequency; and is also provided with
And if the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system is larger than the first reflection threshold value in the reference frequency determining step, controlling the electromagnetic wave generating system to stop working.
Optionally, the control method further includes:
and a power adjusting step: and if the accumulated frequency difference of any one or more frequency adjustments in the preset times in the frequency matching step is larger than a power-down frequency difference threshold value, controlling the electromagnetic wave generating system to reduce the power of the electromagnetic wave generated by the electromagnetic wave generating system.
Optionally, in the frequency matching step, the electromagnetic wave generating system is controlled to adjust the frequency in a low frequency direction with the current frequency as a starting point.
Optionally, the preset frequency modulation condition is that the electromagnetic wave generating system is not controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system for continuous preset time, or the reflection parameter of the electromagnetic wave generating system is larger than a preset frequency modulation reflection threshold value; and is also provided with
The preset matching condition is an inflection point where the reflection parameter is concave or the reflection parameter is minimum.
According to a second aspect of the present invention, there is provided a heating device comprising:
the cavity is used for placing an object to be treated;
an electromagnetic wave generating system for generating electromagnetic waves in the cavity to heat the object to be treated; and
a controller configured to perform any of the control methods described above.
According to the invention, the heating is ensured to be timely terminated through the plurality of termination heating conditions, so that the heating of the object to be treated is accurately stopped in a state expected by a user, the object to be treated is prevented from being excessively heated, the loss of nutrient substances of the object to be treated is reduced, particularly, the unfrozen food can be kept in a good form when the food is unfrozen, the subsequent treatment of the user is facilitated, and the user experience is improved.
Further, the invention determines whether the object to be processed has a hot spot or not through the accumulated frequency difference of frequency adjustment at any time or times in the preset frequency in the frequency matching step, and controls the electromagnetic wave generating system to reduce the power of the electromagnetic wave generated by the electromagnetic wave generating system under the condition that the accumulated frequency difference is larger than the power-down frequency difference threshold value, thereby effectively avoiding the continuous and rapid temperature rise of the hot spot part, improving the temperature uniformity of the object to be processed, and being particularly suitable for food thawing.
The inventor creatively realizes that in the food thawing process, when hot spots appear on the food locally, the hot spots are changed from ice to water, and as the dielectric constant of the water is far greater than that of the ice, the resonant frequency of the cavity can change greatly in a short time, whether the hot spots appear on the object to be treated can be accurately determined through the accumulated frequency difference of frequency adjustment at any time or times in preset times, sensing elements such as a temperature sensor and the like are not needed to be additionally arranged, and the production cost is reduced.
Furthermore, the invention searches and determines the reference frequency to represent the rough position of the optimal frequency by a larger step length, and searches and determines the optimal frequency to serve as the initial frequency by a smaller step length in the vicinity of the reference frequency.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic block diagram of a heating apparatus according to one embodiment of the present invention;
FIG. 2 is a schematic block diagram of the controller of FIG. 1;
FIG. 3 is a schematic flow chart of a control method for a heating device according to one embodiment of the invention;
fig. 4 is a schematic detailed flowchart of a control method for a heating apparatus according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic structural view of a heating apparatus 100 according to an embodiment of the present invention. Referring to fig. 1, the heating apparatus 100 may include a cavity 110, an electromagnetic wave generation system, and a controller 140.
The cavity 110 may include a barrel and a door. The cartridge may be used to hold the object 150 to be treated. The door body can be used for opening and closing the taking and placing opening of the cylinder body.
The cylinder and door may be provided with electromagnetic shielding features to reduce electromagnetic leakage. Wherein, the barrel can be made of metal and is arranged to be grounded.
The electromagnetic wave generating system may be at least partially disposed in the cavity 110 or connected to the cavity 110, so as to generate electromagnetic waves in the cavity 110 and heat the object 150 to be processed.
The electromagnetic wave generating system may include an electromagnetic wave generating module 120, a radiation antenna 130 electrically connected with the electromagnetic wave generating module 120, and a power supply for supplying power to the electromagnetic wave generating module 120.
The electromagnetic wave generation module 120 may be configured to generate an electromagnetic wave signal. The radiation antenna 130 may be disposed in the cavity 110 to generate electromagnetic waves in the cavity 110. The electromagnetic wave generation module 120 may include a variable frequency source and a power amplifier, among other things.
Fig. 2 is a schematic structural diagram of the controller 140 in fig. 1. Referring to fig. 2, the controller 140 may include a processing unit 141 and a storage unit 142. The storage unit 142 stores a computer program 143, and the computer program 143 is used to implement the control method according to the embodiment of the present invention when executed by the processing unit 141.
The processing unit 141 may be configured to control the electromagnetic wave generating module 120 to generate an electromagnetic wave signal to heat the object to be processed, and in case that the preset frequency modulation condition is satisfied, control the electromagnetic wave generating module 120 to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module to satisfy the preset matching condition, and control the electromagnetic wave generating module 120 to generate the electromagnetic wave signal with the frequency satisfying the preset matching condition until the preset frequency modulation condition is reached next time, so as to improve the heating efficiency.
The preset frequency modulation condition may be that the electromagnetic wave generating module 120 is not controlled to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module or the reflection parameter of the electromagnetic wave generating system is greater than a preset frequency modulation reflection threshold value for continuously preset time, so that the object to be processed 150 has a strong absorption capability on the electromagnetic wave all the time in the heating process.
The reflection parameter may be return loss S11. The reflection parameter may also be a reflection power value of the electromagnetic wave signal reflected back to the electromagnetic wave generation module 120.
The preset matching condition may be an inflection point at which the reflection parameter of the electromagnetic wave generating system appears concave or a minimum value of the reflection parameter.
In some embodiments, in the case that the preset frequency modulation condition is satisfied, the processing unit 141 may be configured to control the electromagnetic wave generating module 120 to adjust the frequency of the electromagnetic wave signal in the low frequency direction with the current frequency as a starting point, so as to shorten the time of frequency matching, and avoid undesirable waste of energy consumption.
In particular, the processing unit 141 may be configured to control the electromagnetic wave generation module 120 to stop operating to ensure that the heating is terminated timely, such that the heating of the object to be processed 150 is accurately stopped in a state desired by the user, in the case that any one of the heating termination conditions is satisfied.
Specifically, the heating termination condition may include at least two of the following conditions: counting down the remaining heating time; the accumulated frequency difference delta f of the frequency meeting the preset matching condition for the preset times is smaller than the termination frequency difference threshold D 2 The method comprises the steps of carrying out a first treatment on the surface of the The electromagnetic wave generating module 120 works for a preset continuous heating time under the condition that the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range; the electromagnetic wave generating module 120 generates an electromagnetic wave having a frequency of the electromagnetic wave which is the minimum value of the preset alternative frequency range, and the reflection parameter of the electromagnetic wave generating module 120 is larger than the preset termination reflection threshold S 3 Whether heating is completed or not is judged from various angles of time, change of state, moisture content and the like.
The termination heating condition may include, for example, only "the remaining heating time is completed by counting down" and "the cumulative frequency difference Δf of the preset number of frequencies satisfying the preset matching condition is smaller than the termination frequency difference threshold D 2 ”。
For example, the termination heating condition may include only "the remaining heating time countdown is completed" and "the electromagnetic wave generating module 120 operates for a preset continued heating time in a case where the frequency of the electromagnetic wave is a minimum value of a preset alternative frequency range.
The termination heating condition may include, for example, only "the cumulative frequency difference Δf of the preset number of frequencies satisfying the preset matching condition is smaller than the termination frequency difference threshold D 2 The sum electromagnetic wave generation module 120 is configured such that, in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range, the reflection parameter of the electromagnetic wave generation module 120 is greater than the preset termination reflection threshold S 3 ”。
The termination heating condition may include, for example, only "the electromagnetic wave generating module 120 operates for a preset continued heating time in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range" and "the reflection parameter of the electromagnetic wave generating module 120 is greater than the preset termination reflection threshold S in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range" and "the electromagnetic wave generating module 120 3 ”。
For example, the termination heating condition may include only "the remaining heating time is completed by countdown", "the cumulative frequency difference Δf of the preset number of frequencies satisfying the preset matching condition is smaller than the termination frequency difference threshold D 2 The sum electromagnetic wave generation module 120 operates for a preset continued heating time in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range.
An alternative frequency range may be 350MHz to 500MHz. Further, the alternative frequency range may be 400MHz to 460MHz to further improve the temperature uniformity of the object 150 to be treated.
In some embodiments, the processing unit 141 may be configured to determine the frequency (optimal frequency) with the smallest reflection parameter from the range of alternative frequencies as the initial frequency for heating the object 150.
In some further embodiments, the remaining heating time can be determined according to the initial frequency, so as to reduce the number of sensing elements, reduce or even eliminate time deviation generated by errors of the sensing elements, ensure the accuracy of the remaining heating time, and reduce the production cost. Wherein the remaining heating time may be inversely related to the initial frequency.
In some embodiments, the processing unit 141 may be configured to satisfy the preset match any one or more times within the preset number of timesThe cumulative frequency difference deltaf of the frequencies of the condition is larger than the down-power frequency difference threshold D 1 In the case of (1), the electromagnetic wave generating module 120 is controlled to reduce the power of the electromagnetic wave signal generated by the electromagnetic wave generating module, so as to effectively avoid the hot spot portion from continuously and rapidly heating up, and improve the temperature uniformity of the object to be treated 150. Wherein the termination frequency difference threshold D 2 Can be smaller than the down power frequency difference threshold D 1 。
The processing unit 141 may be configured to calculate a single frequency difference between the frequency satisfying the preset frequency modulation condition and the frequency satisfying the preset matching condition each time, and store the single frequency difference of the latest preset times in the storage unit 142, so as to determine the accumulated frequency difference Δf of any one or more frequency adjustments in time.
The single frequency difference is the absolute value of the difference between the frequency satisfying the preset frequency modulation condition and the frequency satisfying the preset matching condition. The accumulated frequency difference deltaf is the sum of the single frequency differences of the corresponding times.
The processing unit 141 may be further configured to lengthen the remaining heating time while controlling the electromagnetic wave generating module 120 to reduce the power of the electromagnetic wave signal it generates, so as to avoid incomplete heating.
The rate of decrease in the power of the electromagnetic wave signal may be smaller than the rate of extension of the remaining heating time to stop the heating of the object to be treated 150 in a state desired by the user while improving the temperature uniformity.
Illustratively, the power of the electromagnetic wave signal may be reduced by 20% -40%, such as 20%, 30%, or 40%. The remaining heating time may be extended by 35% to 55%, such as 35%, 40%, 45%, or 55%.
In some further embodiments, the power-down difference threshold D 1 And a termination frequency difference threshold D 2 Can be determined according to the initial frequency to adapt to different kinds of objects 150 to be processed with different size parameters. Wherein the power-down frequency difference threshold D 1 And a termination frequency difference threshold D 2 May be positively correlated with the initial frequency.
In some further embodiments, the processing unit 141 may be configured to first determine a reference frequency f for searching for an optimal frequency b And then determining the optimal frequency f suitable for heating g As an initial frequency to increase the determined optimal frequency f g Thereby reducing the total heating time, reducing unnecessary energy loss, and improving the energy efficiency ratio of the heating apparatus 100.
Specifically, the processing unit 141 may be configured to control the electromagnetic wave generation module 120 to follow a preset first step W 1 Adjusting the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module 120 within a preset alternative frequency range, acquiring the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating module 120 and determining the reference frequency f according to the reflection parameter b 。
The processing unit 141 may be further configured to control the electromagnetic wave generation module 120 to follow a preset second step W 2 Adjusting the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module 120 within a selected frequency range, acquiring the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating module 120 and determining the optimal frequency f according to the reflection parameters g . Wherein the selected frequency range can be based on the reference frequency f b In a first step length W 1 Is the frequency in the range of the radius.
Second step W 2 The absolute value of (a) may be smaller than the first step W 1 Is the absolute value of (c).
In some embodiments, processing unit 141 may be configured to increment search reference frequency f from the minimum value of the candidate frequency range b . Namely, a first step length W 1 Is a positive number.
In some alternative embodiments, the processing unit 141 may also be configured to decrement the search reference frequency f from the maximum value of the alternative frequency range b . Namely, a first step length W 1 And is negative.
First step length W 1 The absolute value of (2) may be 5MHz to 10MHz. For example, 5MHz, 7MHz, or 10MHz.
Second step W 2 The absolute value of (2) may be 1MHz to 2MHz. For example, 1MHz, 1.5MHz, or 2MHz.
In some further embodiments, the processing unit 141 may be configured to control the electromagnetic wave generating module 120 to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module to a reflection parameter smaller than a preset first reflection threshold S 1 And make the reflection parameter smallAt a first reflection threshold S 1 Is determined as a reference frequency f b . That is, the processing unit 141 will first appear that the reflection parameter is less than the first reflection threshold S 1 Is determined as a reference frequency f b To obtain the accurate optimal frequency f g At the same time as the determination of the optimum frequency f is further improved g Is not limited to the above-described embodiments.
In some further embodiments, the processing unit 141 may be configured to generate a reflection parameter corresponding to each frequency of the electromagnetic wave generating module 120 greater than the first reflection threshold S 1 In the case of (a), the electromagnetic wave generating module 120 is controlled to stop working, and a visual signal and/or an audible signal is sent to prompt a fault to a user, so that the heating effect is not bad and the electromagnetic wave generating system is prevented from being damaged.
In some further embodiments, the processing unit 141 may be configured to control the electromagnetic wave generating module 120 to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module to an inflection point where the reflection parameter is concave, and determine the frequency corresponding to the inflection point as the optimal frequency f g So as to obtain an excellent heating effect. Optimum frequency f g The reflection parameter corresponding to the former frequency and the reflection parameter corresponding to the latter frequency are both larger than the optimal frequency f g I.e. with a concave inflection point).
In some further embodiments, the processing unit 141 may be configured to determine the self-reference frequency f first b The electromagnetic wave generating module 120 is further controlled to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module to the inflection point where the reflection parameter is concave in the searching direction of the high-frequency or low-frequency searching.
In some exemplary embodiments, the processing unit 141 may be configured to obtain the specific reference frequencies f, respectively b Greater than the second step length W 2 Frequency sum of (2) to reference frequency f b Less than the second step length W 2 Comparing the magnitudes of the two reflection parameters, and determining the direction corresponding to the frequency with the smaller reflection parameter as the searching direction.
In some further embodiments, the processing unit 141 may be configured to be at an optimal frequency f g Corresponding reflectionThe parameter is larger than a preset second reflection threshold S 2 In the case of (a), the electromagnetic wave generation module 120 is controlled to stop working and give out a visual signal and/or an audible signal to prompt a fault so as to avoid bad heating effect. Second reflection threshold S 2 Can be smaller than the first reflection threshold S 1 。
In some further embodiments, the processing unit 141 may be configured to be at an optimal frequency f g Greater than or equal to a preset minimum frequency threshold f i And is less than or equal to a preset maximum frequency threshold f a In the case of (a) according to the optimum frequency f g The remaining heating time is determined.
The processing unit 141 may be configured to count down according to the remaining heating time, and when the remaining heating time is 0, control the electromagnetic wave generating module 120 to stop working, and issue a visual signal and/or an audible signal to prompt that the heating is completed.
In some further embodiments, the processing unit 141 may be configured to be at an optimal frequency f g Less than the minimum frequency threshold f i In the case of (a), the electromagnetic wave generation module 120 is controlled to stop working and send out a visual signal and/or an audible signal to prompt overload so as to avoid overlong heating time.
Minimum frequency threshold f i The difference from the minimum of the alternative frequency range may be 15% to 30% of the difference between the maximum and minimum of the alternative frequency range. For example, 15%, 20%, 25%, or 30%.
In some further embodiments, the processing unit 141 may be configured to be at an optimal frequency f g Greater than the maximum frequency threshold f a In the event that the electromagnetic wave generation module 120 is controlled to cease operation and emit a visual signal and/or audible signal to indicate no load, to avoid damaging the electromagnetic wave generation system.
Maximum value of alternative frequency range and maximum frequency threshold f a The difference between the maximum and minimum of the alternative frequency ranges may be 5% to 10%. For example, 5%, 7%, 8%, or 10%.
It should be noted that the heating device 100 of the present invention is particularly suitable for application to a refrigerator, and the cavity 110 may be disposed in a storage compartment of the refrigerator.
Fig. 3 is a schematic flow chart of a control method for the heating apparatus 100 according to an embodiment of the present invention. Referring to fig. 3, the control method for the heating apparatus 100 of the present invention may include the steps of:
heating the object to be treated (step S302): controlling the electromagnetic wave generating system to generate electromagnetic waves so as to heat the object to be treated;
frequency matching step (step S304): if the preset frequency modulation condition is met, suspending the heating step of the object to be treated, controlling the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system so as to meet the preset matching condition, correcting the frequency of the electromagnetic wave in the heating step of the object to be treated to the frequency meeting the preset matching condition, and continuing the heating step of the object to be treated so as to improve the heating efficiency;
terminating the heating step (step S306): if any one of the heating termination conditions is satisfied, the electromagnetic wave generation system is controlled to stop the operation to ensure that the heating is terminated timely, so that the heating of the object to be treated 150 is accurately stopped in a state desired by the user.
Specifically, the heating termination condition may include at least two of the following conditions: counting down the remaining heating time; the accumulated frequency difference delta f of the frequency meeting the preset matching condition for the preset times is smaller than the termination frequency difference threshold D 2 The method comprises the steps of carrying out a first treatment on the surface of the The electromagnetic wave generating module 120 works for a preset continuous heating time under the condition that the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range; the electromagnetic wave generating module 120 generates an electromagnetic wave having a frequency of the electromagnetic wave which is the minimum value of the preset alternative frequency range, and the reflection parameter of the electromagnetic wave generating module 120 is larger than the preset termination reflection threshold S 3 Whether heating is completed or not is judged from various angles of time, change of state, moisture content and the like.
The termination heating condition may include, for example, only "the remaining heating time is completed by counting down" and "the cumulative frequency difference Δf of the preset number of frequencies satisfying the preset matching condition is smaller than the termination frequency difference threshold D 2 ”。
For example, the termination heating condition may include only "the remaining heating time countdown is completed" and "the electromagnetic wave generating module 120 operates for a preset continued heating time in a case where the frequency of the electromagnetic wave is a minimum value of a preset alternative frequency range.
The termination heating condition may include, for example, only "the cumulative frequency difference Δf of the preset number of frequencies satisfying the preset matching condition is smaller than the termination frequency difference threshold D 2 The sum electromagnetic wave generation module 120 is configured such that, in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range, the reflection parameter of the electromagnetic wave generation module 120 is greater than the preset termination reflection threshold S 3 ”。
The termination heating condition may include, for example, only "the electromagnetic wave generating module 120 operates for a preset continued heating time in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range" and "the reflection parameter of the electromagnetic wave generating module 120 is greater than the preset termination reflection threshold S in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range" and "the electromagnetic wave generating module 120 3 ”。
For example, the termination heating condition may include only "the remaining heating time is completed by countdown", "the cumulative frequency difference Δf of the preset number of frequencies satisfying the preset matching condition is smaller than the termination frequency difference threshold D 2 The sum electromagnetic wave generation module 120 operates for a preset continued heating time in the case where the frequency of the electromagnetic wave is the minimum value of the preset alternative frequency range.
An alternative frequency range may be 350MHz to 500MHz. Further, the alternative frequency range may be 400MHz to 460MHz to further improve the temperature uniformity of the object 150 to be treated.
In some embodiments, in the frequency matching step, the preset frequency modulation condition may be that the electromagnetic wave generating module 120 is not controlled to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module continuously for a preset time, or the reflection parameter of the electromagnetic wave generating system is greater than a preset frequency modulation reflection threshold value, so that the object to be processed 150 has a strong absorption capability on the electromagnetic wave all the time in the heating process.
The reflection parameter may be return loss S11. The reflection parameter may also be a reflection power value of the electromagnetic wave signal reflected back to the electromagnetic wave generation module 120.
In some embodiments, in the frequency matching step, the preset matching condition may be an inflection point at which the reflection parameter of the electromagnetic wave generating system appears concave or the reflection parameter is a minimum value.
In some embodiments, the frequency matching step may control the electromagnetic wave generating module 120 to adjust the frequency of the electromagnetic wave signal in the low frequency direction with the current frequency as a starting point, so as to shorten the time of frequency matching and avoid the undesirable waste of energy consumption.
In some embodiments, the control method of the present invention may further include an initial frequency determining step prior to the heating step of the treatment object. The initial frequency determining step may determine a frequency (optimum frequency) at which the reflection parameter is minimum from among the alternative frequency ranges as the initial frequency for heating the object 150.
In some further embodiments, the control method of the present invention may further include a remaining time determining step. The remaining time determining step may determine the remaining heating time of the object to be processed 150 according to the initial frequency, so as to reduce the number of sensing elements, reduce or even eliminate time deviation generated by errors of the sensing elements, ensure the accuracy of the remaining heating time, and reduce the production cost. Wherein the remaining heating time may be inversely related to the initial frequency.
In some embodiments, the control method of the present invention may further comprise a power adjustment step. The power adjusting step can be carried out in such a way that the accumulated frequency difference delta f of any one or more frequencies meeting the preset matching condition within the preset times is larger than the power-down frequency difference threshold D 1 In the case of (1), the electromagnetic wave generating module 120 is controlled to reduce the power of the electromagnetic wave signal generated by the electromagnetic wave generating module, so as to effectively avoid the hot spot portion from continuously and rapidly heating up, and improve the temperature uniformity of the object to be treated 150. Wherein the termination frequency difference threshold D 2 Can be smaller than the down power frequency difference threshold D 1 。
The frequency matching step may further comprise: and calculating the single frequency difference before and after frequency adjustment, and storing the single frequency difference of the latest preset times so as to determine the accumulated frequency difference deltaf of any one or more frequency adjustments in time.
The single frequency difference is the absolute value of the difference between the frequency before the frequency adjustment and the frequency after the frequency adjustment. The accumulated frequency difference deltaf is the sum of the single frequency differences of the corresponding times.
The control method of the present invention may further include a time correction step. The time correction step is performed simultaneously with the power adjustment step, and the remaining heating time is prolonged on the basis of the current remaining heating time, so as to avoid incomplete heating.
The rate of decrease in the power of the electromagnetic wave signal may be smaller than the rate of extension of the remaining heating time to stop the heating of the object to be treated 150 in a state desired by the user while improving the temperature uniformity.
Illustratively, in the power conditioning step, the power of the electromagnetic wave signal may be reduced by 20% -40%, such as 20%, 30%, or 40%. In the time correction step, the remaining heating time may be extended by 35% to 55%, for example 35%, 40%, 45%, or 55%.
In some further embodiments, the control method of the present invention may further include a frequency offset threshold determining step. The frequency offset threshold determining step may determine the down-power frequency offset threshold D based on the initial frequency 1 And a termination frequency difference threshold D 2 To accommodate different types and sizes of objects 150 to be treated. Wherein the power-down frequency difference threshold D 1 And a termination frequency difference threshold D 2 May be positively correlated with the initial frequency.
In some further embodiments, the initial frequency determining step may first determine a reference frequency f for searching for an optimal frequency b And then determining the optimal frequency f suitable for heating g As an initial frequency to increase the determined optimal frequency f g Thereby reducing the total heating time, reducing unnecessary energy loss, and improving the energy efficiency ratio of the heating apparatus 100.
Specifically, the optimal frequency determining step may include:
a reference frequency determining step: the electromagnetic wave generation module 120 is controlled according to a preset first step W 1 The frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module 120 is regulated within the preset alternative frequency range, and the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating module 120 is obtained and is according to the reflectionThe radio parameter determines the reference frequency f b ；
An optimal frequency determining step: controlling the electromagnetic wave generating module 120 to follow a preset second step length W 2 Adjusting the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module 120 within a selected frequency range, acquiring the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating module 120 and determining the optimal frequency f according to the reflection parameters g 。
The selected frequency range may be based on the reference frequency f b In a first step length W 1 Is the frequency in the range of the radius. Second step W 2 The absolute value of (a) may be smaller than the first step W 1 Is the absolute value of (c).
In some embodiments, the reference frequency f is determined b Can increment the search reference frequency f from the minimum value of the alternative frequency range in the process of (a) b . Namely, a first step length W 1 Is a positive number.
In some alternative embodiments, the reference frequency f is determined b The search reference frequency f may be decremented from the maximum value of the alternative frequency range in the process of (a) b . Namely, a first step length W 1 And is negative.
First step length W 1 The absolute value of (2) may be 5MHz to 10MHz. For example, 5MHz, 7MHz, or 10MHz.
Second step W 2 The absolute value of (2) may be 1MHz to 2MHz. For example, 1MHz, 1.5MHz, or 2MHz.
In some further embodiments, in the optimal frequency determining step, the electromagnetic wave generating module 120 is controlled to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module to a reflection parameter less than a preset first reflection threshold value S 1 And the reflection parameter is smaller than the first reflection threshold S 1 Is determined as a reference frequency f b . That is, the first occurrence of the reflection parameter is smaller than the first reflection threshold S 1 Is determined as a reference frequency f b To obtain the accurate optimal frequency f g At the same time as the determination of the optimum frequency f is further improved g Is not limited to the above-described embodiments.
In some further embodiments, if the reflection generated by the electromagnetic wave generating module 120 corresponds to each frequencyThe parameters are all greater than the first reflection threshold S 1 The electromagnetic wave generation module 120 is controlled to stop working, and a visual signal and/or an audible signal is sent to prompt a fault to a user so as to avoid the bad heating effect and damage to the electromagnetic wave generation system.
In some further embodiments, in the optimal frequency determining step, the electromagnetic wave generating module 120 is controlled to adjust the frequency of the electromagnetic wave signal generated thereby to an inflection point where the reflection parameter is concave, and the frequency corresponding to the inflection point is determined as the optimal frequency f g So as to obtain an excellent heating effect. Optimum frequency f g The reflection parameter corresponding to the former frequency and the reflection parameter corresponding to the latter frequency are both larger than the optimal frequency f g I.e. with a concave inflection point).
In some further embodiments, in the optimum frequency determining step, the self-reference frequency f may be determined first b The electromagnetic wave generating module 120 is further controlled to adjust the frequency of the electromagnetic wave signal generated by the electromagnetic wave generating module to the inflection point where the reflection parameter is concave in the searching direction of the high-frequency or low-frequency searching.
Illustratively, the specific reference frequencies f may be obtained separately b Greater than the second step length W 2 Frequency sum of (2) to reference frequency f b Less than the second step length W 2 Comparing the magnitudes of the two reflection parameters, and determining the direction corresponding to the frequency with the smaller reflection parameter as the searching direction.
In some further embodiments, if the optimal frequency f g The corresponding reflection parameter is larger than a preset second reflection threshold S 2 The electromagnetic wave generation module 120 is controlled to stop working and send out visual signals and/or audible signals to prompt faults so as to avoid bad heating effect. Second reflection threshold S 2 Can be smaller than the first reflection threshold S 1 。
In some further embodiments, if the optimal frequency f g Greater than or equal to a preset minimum frequency threshold f i And is less than or equal to a preset maximum frequency threshold f a According to the optimum frequency f g Determining the remaining heating time, and when the remaining heating time is 0,the electromagnetic wave generation module 120 is controlled to stop working, give out a visual signal and/or an audible signal to prompt the completion of heating.
In some further embodiments, if the optimal frequency f g Less than the minimum frequency threshold f i The electromagnetic wave generation module 120 is controlled to stop working and send out visual signals and/or audible signals to prompt overload so as to avoid overlong heating time.
Minimum frequency threshold f i The difference from the minimum of the alternative frequency range may be 15% to 30% of the difference between the maximum and minimum of the alternative frequency range. For example, 15%, 20%, 25%, or 30%.
In some further embodiments, if the optimal frequency f g Greater than the maximum frequency threshold f a The electromagnetic wave generation module 120 is controlled to stop working and send out a visual signal and/or an audible signal to prompt no load so as to avoid damaging the electromagnetic wave generation system.
Maximum value of alternative frequency range and maximum frequency threshold f a The difference between the maximum and minimum of the alternative frequency ranges may be 5% to 10%. For example, 5%, 7%, 8%, or 10%.
Fig. 4 is a schematic detailed flowchart of a control method for the heating apparatus 100 according to one embodiment of the present invention (in fig. 4, "Y" means "yes"; "N" means "no"). Referring to fig. 4, the control method for the heating apparatus 100 of the present invention may include the following detailed steps:
step S402: controlling the electromagnetic wave generating system according to a preset first step length W 1 Adjusting the frequency of the electromagnetic wave generated by the electromagnetic wave generating system in a preset alternative frequency range, and acquiring a reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system;
step S404: judging whether the reflection parameter is smaller than the first reflection threshold S 1 . If yes, go to step S406; if not, go to step S414.
Step S406: will first appear to be smaller than the first reflection threshold S 1 Frequency-determining reference frequency f corresponding to the reflection parameter of (a) b 。
Step S408: in essenceIn the frequency selecting range according to the second step length W 2 Controlling an electromagnetic wave generating system to regulate the frequency of electromagnetic waves generated by the electromagnetic wave generating system, acquiring a reflection parameter corresponding to each frequency to an inflection point with concave reflection coefficient, and determining the frequency corresponding to the inflection point as an optimal frequency f g 。
Step S410: according to the optimum frequency f g Determining a remaining heating time, a power-down frequency difference threshold D 1 And a termination frequency difference threshold D 2 . Step S412 and step S416 are performed.
Step S412: it is determined whether the remaining heating time is equal to 0. If yes, go to step S414; if not, step S412 is repeated.
Step S414: and controlling the electromagnetic wave generating system to stop working.
Step S416: judging whether a preset frequency modulation condition is met. If yes, go to step S418; if not, step S416 is repeated.
Step S418: controlling the electromagnetic wave generating system to adjust the frequency from the current frequency to the direction of low frequency to meet the preset matching condition, and controlling the electromagnetic wave generating system to generate the electromagnetic wave with the frequency meeting the preset matching condition.
Step S420: it is determined whether the current frequency is the minimum of the range of alternative frequencies. If yes, go to step S422; if not, go to step S424.
Step S422: judging whether the reflection parameter is larger than a preset termination reflection threshold S 3 . If yes, go to step S414; if not, step S422 is repeated.
Step S424: calculating the single frequency difference before and after frequency adjustment, and storing the single frequency difference of the latest preset times.
Step S426: calculating the accumulated frequency difference delta f of any one or more frequency adjustments in the preset times according to the stored single frequency difference, and judging whether the accumulated frequency difference delta f of any one or more frequency adjustments in the preset times is larger than a power-down frequency difference threshold D 1 . If yes, go to step S428; if not, go to step S430.
Step S428: the electromagnetic wave generating system is controlled to reduce the power of the electromagnetic wave generated by the electromagnetic wave generating system and prolong the residual heating time. Returning to step S416.
Step S430: judging whether the accumulated frequency difference delta f of the frequency adjustment of the preset times is smaller than the termination frequency difference threshold D 2 . If yes, go to step S414; if not, go to step S416.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (10)
1. A control method for a heating apparatus including a chamber for placing an object to be treated, and an electromagnetic wave generation system for generating electromagnetic waves in the chamber to heat the object to be treated, wherein the control method comprises:
heating the object to be treated: controlling the electromagnetic wave generating system to generate electromagnetic waves so as to heat the object to be treated;
frequency matching: if the preset frequency modulation condition is met, suspending the heating step of the object to be treated, controlling the electromagnetic wave generating system to adjust the frequency of electromagnetic waves generated by the electromagnetic wave generating system so as to meet the preset matching condition, correcting the frequency of the electromagnetic waves in the heating step of the object to be treated to the frequency meeting the preset matching condition, and continuing the heating step of the object to be treated;
terminating the heating step: if any one of the heating termination conditions is met, controlling the electromagnetic wave generation system to stop working; wherein the heating termination condition includes at least two of the following conditions:
counting down the remaining heating time;
the accumulated frequency difference of frequency adjustment of the preset times in the frequency matching step is smaller than a termination frequency difference threshold;
the electromagnetic wave generating system works for a preset continuous heating time under the condition that the frequency of the electromagnetic wave is the minimum value of a preset alternative frequency range;
the electromagnetic wave generating system is characterized in that under the condition that the frequency of the electromagnetic wave is the minimum value of a preset alternative frequency range, the reflection parameter of the electromagnetic wave generating system is larger than a preset termination reflection threshold value.
2. The control method according to claim 1, wherein before the object to be treated heating step, further comprising:
an initial frequency determining step: and determining the frequency with the minimum reflection parameter from the alternative frequency range as the initial frequency of the heating step of the object to be processed.
3. The control method according to claim 2, further comprising:
a remaining time determining step: determining the remaining heating time according to the initial frequency; wherein,
the remaining heating time is inversely related to the initial frequency.
4. The control method according to claim 2, further comprising:
a frequency difference threshold determining step: determining the frequency difference threshold according to the initial frequency; wherein,
the frequency difference threshold is positively correlated with the initial frequency.
5. The control method according to claim 2, wherein the initial frequency determining step further includes:
a reference frequency determining step: controlling the electromagnetic wave generation system to adjust the frequency of electromagnetic waves generated by the electromagnetic wave generation system in a preset alternative frequency range according to a preset first step length, and determining a reference frequency according to the reflection parameter;
an optimal frequency determining step: controlling the electromagnetic wave generation system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generation system in a carefully selected frequency range according to a preset second step length, and determining the frequency with the minimum reflection parameter as the initial frequency; wherein,
the selected frequency range is a frequency within a range having the absolute value of the first step as a radius based on the reference frequency;
the absolute value of the second step is smaller than the absolute value of the first step; and is also provided with
In the frequency matching step, the electromagnetic wave generating system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system according to the second step length.
6. The control method according to claim 5, wherein,
in the reference frequency determining step, controlling the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system to a value, the reflection parameter of which is smaller than a preset first reflection threshold value, and determining the frequency, the reflection parameter of which is smaller than the first reflection threshold value, as the reference frequency; and is also provided with
And if the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system is larger than the first reflection threshold value in the reference frequency determining step, controlling the electromagnetic wave generating system to stop working.
7. The control method according to claim 1, further comprising:
and a power adjusting step: and if the accumulated frequency difference of any one or more frequency adjustments in the preset times in the frequency matching step is larger than a power-down frequency difference threshold value, controlling the electromagnetic wave generating system to reduce the power of the electromagnetic wave generated by the electromagnetic wave generating system.
8. The control method according to claim 1, wherein,
in the frequency matching step, the electromagnetic wave generating system is controlled to adjust the frequency in a low frequency direction with the current frequency as a starting point.
9. The control method according to claim 1, wherein,
the preset frequency modulation condition is that the electromagnetic wave generating system is not controlled to adjust the frequency of electromagnetic waves generated by the electromagnetic wave generating system continuously for preset time, or the reflection parameter of the electromagnetic wave generating system is larger than a preset frequency modulation reflection threshold value; and is also provided with
The preset matching condition is an inflection point where the reflection parameter is concave or the reflection parameter is minimum.
10. A heating device, comprising:
the cavity is used for placing an object to be treated;
an electromagnetic wave generating system for generating electromagnetic waves in the cavity to heat the object to be treated; and
a controller configured to perform the control method of any one of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210800514.XA CN117412422A (en) | 2022-07-06 | 2022-07-06 | Control method for heating device and heating device |
| PCT/CN2023/105905 WO2024008119A1 (en) | 2022-07-06 | 2023-07-05 | Control method for heating device, and heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210800514.XA CN117412422A (en) | 2022-07-06 | 2022-07-06 | Control method for heating device and heating device |
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| CN117412422A true CN117412422A (en) | 2024-01-16 |
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| CN202210800514.XA Pending CN117412422A (en) | 2022-07-06 | 2022-07-06 | Control method for heating device and heating device |
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| JP4120416B2 (en) * | 2003-02-13 | 2008-07-16 | 松下電器産業株式会社 | High frequency heating device |
| CN112996161B (en) * | 2019-12-13 | 2022-08-23 | 青岛海尔电冰箱有限公司 | Control method for heating device and heating device |
| CN112969248B (en) * | 2019-12-13 | 2022-12-16 | 青岛海尔电冰箱有限公司 | Control method for heating device and heating device |
| CN113099569B (en) * | 2020-01-08 | 2022-06-24 | 青岛海尔电冰箱有限公司 | Control method for heating device and heating device |
| CN114521033A (en) * | 2020-11-20 | 2022-05-20 | 青岛海尔特种电冰箱有限公司 | Control method for heating device and heating device |
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