CN117412424A - Control method for heating device and heating device - Google Patents

Control method for heating device and heating device Download PDF

Info

Publication number
CN117412424A
CN117412424A CN202210800521.XA CN202210800521A CN117412424A CN 117412424 A CN117412424 A CN 117412424A CN 202210800521 A CN202210800521 A CN 202210800521A CN 117412424 A CN117412424 A CN 117412424A
Authority
CN
China
Prior art keywords
frequency
electromagnetic wave
reflection
optimal
control method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210800521.XA
Other languages
Chinese (zh)
Inventor
马坚
韩志强
苗建林
李春阳
刘勇豪
刘阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Refrigerator Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Refrigerator Co Ltd
Haier Smart Home Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Refrigerator Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Refrigerator Co Ltd
Priority to CN202210800521.XA priority Critical patent/CN117412424A/en
Publication of CN117412424A publication Critical patent/CN117412424A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)

Abstract

The invention provides a control method for a heating device and the heating device. The heating device includes a cavity and an electromagnetic wave generating system for generating electromagnetic waves within the cavity. The control method comprises the following steps: a reference frequency determining step: controlling an 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, acquiring a reflection parameter corresponding to each frequency, and determining a reference frequency according to the reflection parameters; an optimal frequency determining step: controlling the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system in a carefully selected frequency range according to a preset second step length, obtaining a reflection parameter corresponding to each frequency, and determining the optimal frequency according to the reflection parameters. Wherein the selected frequency range is a frequency within a range having a radius of the absolute value of the first step based on the reference frequency; and the absolute value of the second step length is smaller than that of the first step length, so that the efficiency of determining the optimal frequency is improved, and the heating time is shortened.

Description

Control method for heating device and heating device
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.
In order to further improve the thawing efficiency, the prior art determines the optimal frequency with the best thawing effect by comparing all selectable frequencies of a traversing system, and thawing is carried out according to the determined optimal frequency. However, this method takes too much time in determining the optimal frequency, not only increases the total thawing time, but also reduces the energy efficiency ratio of the heating device.
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.
It is a further object of the first aspect of the invention to improve the efficiency of determining the optimal frequency.
It is a further object of the first aspect of the invention to ensure heating efficiency and reduce maintenance costs for the user.
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:
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, acquiring a reflection parameter corresponding to each frequency generated by the electromagnetic wave generation system, and determining a reference frequency according to the reflection parameters;
an optimal frequency determining step: controlling the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system in a carefully selected frequency range according to a preset second step length, obtaining a reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system, and determining the optimal frequency according to the reflection parameters; 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; and is also provided with
The absolute value of the second step is smaller than the absolute value of the first step.
Optionally, in the reference frequency determining step, the electromagnetic wave generating system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system to a frequency at which the reflection parameter is smaller than a preset first reflection threshold value, and the frequency at which the reflection parameter is smaller than the first reflection threshold value is determined as the reference frequency.
Optionally, the control method further includes:
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; and/or
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, a visual signal and/or an audible signal is sent to prompt faults.
Optionally, in the optimal frequency determining step, the electromagnetic wave generating system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system to an inflection point where the reflection parameter is concave, and the frequency corresponding to the inflection point is determined as the optimal frequency.
Alternatively, in the optimum frequency determining step, a search direction from the reference frequency to a high frequency or to a low frequency is first determined, and the electromagnetic wave generating system is further controlled in the search direction to adjust the frequency of the electromagnetic wave generated thereby to an inflection point where the reflection parameter appears concave.
Optionally, the control method further includes:
if the reflection parameter corresponding to the optimal frequency is larger than a preset second reflection threshold value, controlling the electromagnetic wave generation system to stop working; and/or
And if the reflection parameter corresponding to the optimal frequency is greater than a preset second reflection threshold value, a visual signal and/or an audible signal is sent to prompt a fault.
Optionally, the control method further includes:
and if the optimal frequency is greater than or equal to a preset minimum frequency threshold and less than or equal to a preset maximum frequency threshold, determining the residual heating time according to the optimal frequency.
Optionally, the control method further includes:
if the optimal frequency is smaller than the minimum frequency threshold, controlling the electromagnetic wave generation system to stop working; and/or
And if the optimal frequency is smaller than the minimum frequency threshold, a visual signal and/or an audible signal is sent to prompt overload.
Optionally, the control method further includes:
if the optimal frequency is larger than the maximum frequency threshold, controlling the electromagnetic wave generation system to stop working; and/or
And if the optimal frequency is greater than the maximum frequency threshold, a visual signal and/or an audible signal is sent to prompt no-load.
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 rough position of the optimal frequency is represented by searching and determining the reference frequency with a larger step length, and then searching and determining the optimal frequency in the vicinity of the reference frequency with a smaller step length.
In the optimal frequency determining step, the searching direction from the reference frequency to the high frequency or to the low frequency is firstly determined, then the searching is continued in the searching direction until the inflection point with concave reflection parameters appears, the frequency corresponding to the inflection point is determined to be the optimal frequency, the time required for determining the optimal frequency is further shortened, the real-time variation of the optimal frequency of the object to be processed in the process of determining the optimal frequency is reduced, the accuracy of the optimal frequency is improved, the residual heating time determined according to the optimal frequency is more accurate, and the heating is stopped in a state expected by a user.
Further, according to the invention, under the condition that all reflection parameters are larger than the first reflection threshold value, under the condition that the reflection parameters corresponding to the optimal frequency are larger than the second reflection threshold value and under the condition that the optimal frequency is smaller than the minimum frequency threshold value or larger than the maximum frequency threshold value, which are measured in the reference frequency determining step, the electromagnetic wave generating system stops working, so that objects which cannot be heated by electromagnetic waves or are not suitable for being heated by the electromagnetic waves are prevented from being placed into the cavity to be heated, the heating effect is ensured, the service life of the electromagnetic wave generating system is prolonged, and the maintenance cost of a user is reduced.
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 graph of electromagnetic wave frequency versus reflection parameter;
FIG. 4 is a schematic flow chart of a control method for a heating device according to one embodiment of the invention;
fig. 5 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.
In particular, 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 。
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).
According to the heating device 100, the rough position of the optimal frequency is represented by searching and determining the reference frequency with a larger step length, and then searching and determining the optimal frequency in the vicinity of the reference frequency with a smaller step length.
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, 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.
An alternative frequency range may be 350MHz to 500MHz. Further, the alternative frequency range may be 400MHz to 460MHz to further enhance the heating effect.
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 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 less than a preset first reflection threshold 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 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.
First reflection threshold S 1 Can be-8 dB to-5 dB. For example, -8dB, -6dB, or-5 dB.
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 generation module 120 is controlled to stop working so as to avoid the bad heating effect and damage to the electromagnetic wave generation system.
The processing unit 141 may also be configured to generate at the electromagnetic wave generation module 120Each frequency of which corresponds to a reflection parameter greater than a first reflection threshold S 1 In the event of a failure, a visual and/or audible signal is sent to the user to improve safety and user experience.
In some 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 thereby 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).
Fig. 3 is a schematic graph of electromagnetic wave frequency versus reflection parameter (in fig. 3, "f" represents "frequency", "S" represents "reflection parameter"). Referring to fig. 3, the inventors of the present application creatively realized that the reflection parameters of the electromagnetic wave generation system are at the optimal frequency f g Where the mutation occurs and is adjacent to the optimal frequency f g The reflection parameter variation of the frequency of (2) has a remarkable law, while the reflection parameters at other frequencies have small fluctuations, firstly according to a first reflection threshold S 1 Determining a reference frequency f b Can effectively prevent the optimal frequency f g Is misjudged by the inflection point of (1), and the optimal frequency f is improved g Accuracy of (3).
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.
At some of the stepsIn a one-step embodiment, the processing unit 141 may be configured to generate a signal at an optimal frequency f g The corresponding reflection 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 operating to avoid bad heating effect.
Second reflection threshold S 2 Can be smaller than the first reflection threshold S 1 . Second reflection threshold S 2 Can be-10 dB to-7 dB. For example, -10dB, -8dB, or-7 dB.
The processing unit 141 may also be configured to be at an optimal frequency f g The corresponding reflection parameter is larger than a preset second reflection threshold S 2 In the event of a visual and/or audible signal to indicate a malfunction, to improve safety and user experience.
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 start counting down after determining 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 acoustic 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 operating so as to avoid the excessive 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%.
The processing unit 141 may also be configured to be at an optimal frequency f g Less than the minimum frequency threshold f i In the event that a visual and/or audible signal is sent to indicate overload, to enhance the user experience.
In some further embodiments, processing unit 141 mayConfigured to be at an optimal frequency f g Greater than the maximum frequency threshold f a In the case of (a), the electromagnetic wave generation module 120 is controlled to stop operating 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%.
The processing unit 141 may also be configured to be at an optimal frequency f g Greater than the maximum frequency threshold f a In the case of (1) a visual and/or audible signal is sent to indicate no load to improve safety and user experience.
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. 4 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. 4, the control method for the heating apparatus 100 of the present invention may include the steps of:
reference frequency determination step (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 within a preset alternative frequency range, acquiring a reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system, and determining a reference frequency f according to the reflection parameters b ；
Optimum frequency determination step (step S404): controlling the electromagnetic wave generating system according to a preset second step length W 2 Adjusting the frequency of the electromagnetic wave generated by the electromagnetic wave generating system in a selected frequency range, acquiring the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system, 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).
According to the control method, the rough position of the optimal frequency is represented by searching and determining the reference frequency with a larger step length, and then searching and determining the optimal frequency in the vicinity of the reference frequency with a smaller step length.
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, the reference frequency determining step may increment the search reference frequency f from the minimum of the candidate frequency ranges b . Namely, a first step length W 1 Is a positive number.
In some alternative embodiments, the reference frequency determining step may also 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.
An alternative frequency range may be 350MHz to 500MHz. Further, the alternative frequency range may be 400MHz to 460MHz to further enhance the heating effect.
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 embodiments, in the reference frequency determining step, the electromagnetic wave generating module 120 may be 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.
First reflection threshold S 1 Can be-8 dB to-5 dB. For example, -8dB, -6dB, or-5 dB.
In some further embodiments, if in the reference frequency determining step, the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating module 120 is greater than the first reflection threshold S 1 The electromagnetic wave generation module 120 is controlled to stop working so as to avoid the bad heating effect and damage to the electromagnetic wave generation system.
If, in the reference frequency determining step, the reflection parameter corresponding to each frequency generated by the electromagnetic wave generating module 120 is greater than the first reflection threshold S 1 And sending out a visual signal and/or an audible signal to prompt a fault to a user so as to improve the safety and the user experience.
In some embodiments, in the optimal frequency determining step, the electromagnetic wave generating module 120 may be controlled to adjust the frequency of the electromagnetic wave signal generated by the same 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, 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.
In some exemplary embodiments, 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 may be controlled to stop operating to avoid bad heating effect.
Second reflection threshold S 2 Can be smaller than the first reflection threshold S 1 . Second reflection threshold S 2 Can be-10 dB to-7 dB. For example, -10dB, -8dB, or-7 dB.
If the optimal frequency f g The corresponding reflection parameter is larger than a preset second reflection threshold S 2 Visual and/or audible signals may be sent to indicate a malfunction to improve security and user experience.
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 Can be according to the optimal frequency f g The remaining heating time is determined.
The countdown is started after the remaining heating time is determined, and when the remaining heating time is 0, the electromagnetic wave generating module 120 can be controlled to stop working, and a visual signal and/or an auditory signal is sent to prompt that the heating is completed.
In some further embodiments, if the optimal frequency f g Less than the minimum frequency threshold f i The electromagnetic wave generating module 120 can be controlled to stop working to avoid the 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%.
If the optimal frequency f g Less than the minimum frequency threshold f i Visual and/or audible signals may be sent to indicate overload to enhance the user experience.
In some further embodiments, if the optimal frequency f g Greater than the maximum frequency threshold f a The electromagnetic wave generation module 120 may be controlled to stop operating 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%.
If the optimal frequency f g Greater than maximumFrequency threshold f a A visual and/or audible signal may be sent to indicate no load to improve safety and user experience.
Fig. 5 is a schematic detailed flowchart of a control method for the heating apparatus 100 according to one embodiment of the present invention (in fig. 5, "Y" means "yes"; "N" means "no"). Referring to fig. 5, the control method for the heating apparatus 100 of the present invention may include the following detailed steps:
step S502: 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 S504: judging whether the reflection parameter is smaller than the first reflection threshold S 1 . If yes, go to step S506; if not, go to step S508.
Step S506: 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 S510 is performed.
Step S508: and controlling the electromagnetic wave generating system to stop working, and sending out a visual signal and/or an audible signal to prompt fault.
Step S510: determination of self-reference frequency f in selected frequency ranges b A search direction of searching toward high frequency or toward low frequency, further in the search direction according to a second step W 2 The electromagnetic wave generation system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generation system, and the reflection parameter corresponding to each frequency is acquired to the inflection point of concave reflection coefficient.
Step S512: judging whether the reflection parameter corresponding to the inflection point is smaller than a second reflection threshold S 2 . If yes, go to step S514; if not, go to step S508.
Step S514: judging whether the frequency corresponding to the inflection point is smaller than a minimum frequency threshold f i . If yes, go to step S516; if not, go to step S518.
Step S516: and controlling the electromagnetic wave generating system to stop working, and sending out a visual signal and/or an audible signal to prompt overload.
Step S518: judging whether the frequency corresponding to the inflection point is greater than a maximum frequency threshold f a . If yes, go to step S520; if not, go to step S522.
Step S520: and controlling the electromagnetic wave generating system to stop working, and sending out a visual signal and/or an audible signal to prompt no-load.
Step S522: determining the frequency corresponding to the inflection point as the optimal frequency f g And according to the optimal frequency f g The remaining heating time is determined.
Step S524: it is determined whether the remaining heating time is equal to 0. If yes, go to step S526; if not, step S524 is repeated.
Step S526: and controlling the electromagnetic wave generating system to stop working, and sending out a visual signal and/or an audible signal to prompt that the heating is finished.
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:
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, acquiring a reflection parameter corresponding to each frequency generated by the electromagnetic wave generation system, and determining a reference frequency according to the reflection parameters;
an optimal frequency determining step: controlling the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system in a carefully selected frequency range according to a preset second step length, obtaining a reflection parameter corresponding to each frequency generated by the electromagnetic wave generating system, and determining the optimal frequency according to the reflection parameters; 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; and is also provided with
The absolute value of the second step is smaller than the absolute value of the first step.
2. The control method according to claim 1, wherein,
in the reference frequency determining step, the electromagnetic wave generating system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system to a value that is smaller than a preset first reflection threshold value, and the frequency that is smaller than the first reflection threshold value is determined as the reference frequency.
3. The control method according to claim 2, further comprising:
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; and/or
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, a visual signal and/or an audible signal is sent to prompt faults.
4. The control method according to claim 1, wherein,
in the optimal frequency determining step, the electromagnetic wave generating system is controlled to adjust the frequency of the electromagnetic wave generated by the electromagnetic wave generating system to an inflection point where the reflection parameter is concave, and the frequency corresponding to the inflection point is determined as the optimal frequency.
5. The control method according to claim 4, wherein,
in the optimum frequency determining step, a search direction from the reference frequency to a high frequency or to a low frequency is first determined, and the electromagnetic wave generating system is further controlled in the search direction to adjust the frequency of the electromagnetic wave generated thereby to an inflection point where the reflection parameter appears concave.
6. The control method according to claim 4, further comprising:
if the reflection parameter corresponding to the optimal frequency is larger than a preset second reflection threshold value, controlling the electromagnetic wave generation system to stop working; and/or
And if the reflection parameter corresponding to the optimal frequency is greater than a preset second reflection threshold value, a visual signal and/or an audible signal is sent to prompt a fault.
7. The control method according to claim 4, further comprising:
and if the optimal frequency is greater than or equal to a preset minimum frequency threshold and less than or equal to a preset maximum frequency threshold, determining the residual heating time according to the optimal frequency.
8. The control method according to claim 7, further comprising:
if the optimal frequency is smaller than the minimum frequency threshold, controlling the electromagnetic wave generation system to stop working; and/or
And if the optimal frequency is smaller than the minimum frequency threshold, a visual signal and/or an audible signal is sent to prompt overload.
9. The control method according to claim 7, further comprising:
if the optimal frequency is larger than the maximum frequency threshold, controlling the electromagnetic wave generation system to stop working; and/or
And if the optimal frequency is greater than the maximum frequency threshold, a visual signal and/or an audible signal is sent to prompt no-load.
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.
CN202210800521.XA 2022-07-06 2022-07-06 Control method for heating device and heating device Pending CN117412424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210800521.XA CN117412424A (en) 2022-07-06 2022-07-06 Control method for heating device and heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210800521.XA CN117412424A (en) 2022-07-06 2022-07-06 Control method for heating device and heating device

Publications (1)

Publication Number Publication Date
CN117412424A true CN117412424A (en) 2024-01-16

Family

ID=89498716

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210800521.XA Pending CN117412424A (en) 2022-07-06 2022-07-06 Control method for heating device and heating device

Country Status (1)

Country Link
CN (1) CN117412424A (en)

Similar Documents

Publication Publication Date Title
EP2469975B1 (en) Control of microwave source efficiency in a microwave heating apparatus
CN107249229B (en) Microwave processing apparatus, method, and machine-readable storage medium
US9030101B2 (en) Frequency enhanced impedance dependent power control for multi-frequency RF pulsing
US7404991B2 (en) Device and control method for micro wave plasma processing
JP5953532B2 (en) Plasma generator
CN110473764B (en) Impedance adjusting method based on radio frequency power supply and radio frequency power supply system
US20150174605A1 (en) Film forming device and film forming method
CN117412424A (en) Control method for heating device and heating device
EP3902376B1 (en) Electromagnetic wave generation system, and heating apparatus with electromagnetic wave generation system
EP4114143A1 (en) Defrosting method for heating apparatus, and heating apparatus
CN112969248B (en) Control method for heating device and heating device
CN113316280B (en) Control method for heating device and heating device
CN117412421A (en) Control method for heating device and heating device
CN209137767U (en) A kind of microwave power source and therapeutic equipment
CN117412423A (en) Control method for heating device and heating device
CN117412420A (en) Calibration method for heating device and heating device
CN113115894A (en) Thawing control method for heating device and heating device
CN114521033A (en) Control method for heating device and heating device
CN112996161A (en) Control method for heating device and heating device
CN117412416A (en) Control method for heating device and heating device
CN117412419A (en) Control method for heating device and heating device
CN117412422A (en) Control method for heating device and heating device
CN116261235A (en) Control method for heating device and heating device
CN117412417A (en) Control method for heating device and heating device
KR101930018B1 (en) Fast RF conditioning system and method for RF linear accelerators

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination