CN106322453A - Heating control method and heating control device for microwave oven and microwave oven - Google Patents
Heating control method and heating control device for microwave oven and microwave oven Download PDFInfo
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- CN106322453A CN106322453A CN201610817661.2A CN201610817661A CN106322453A CN 106322453 A CN106322453 A CN 106322453A CN 201610817661 A CN201610817661 A CN 201610817661A CN 106322453 A CN106322453 A CN 106322453A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/681—Circuits comprising an inverter, a boost transformer and a magnetron
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Abstract
The embodiment of the invention provides a heating control method and a heating control device for a microwave oven and the microwave oven comprising the heating control device and belongs to the technical field of microwaves. The heating control method for the microwave oven includes the steps that a microwave source of the microwave oven is controlled for heating a load in a heating chamber of the microwave oven; the frequency or the phase position or the frequency and phase position combination of the microwave source is changed step by step, and therefore N frequencies or phase positions or frequency and phase position combinations with the standing-wave ratio lower than the preset standing-wave ratio are determined, wherein N is an integer larger than 1; and the microwave source is controlled by the N frequencies or phase positions or frequency and phase position combinations to heat the load according to the determined N frequencies or phase positions or frequency and phase position combinations. By means of the heating control method and the heating control device for the microwave oven and the microwave oven, different types of foods can be heated evenly, and the heating efficiency can also be taken into consideration.
Description
Technical field
The present invention relates to microwave technical field, in particular it relates to a kind of method for heating and controlling for microwave oven, add thermal control
Control equipment and comprise the microwave oven of this heating control devices.
Background technology
Microwave is a kind of electromagnetic wave, and microwave oven is the modernization cooking kitchen range of a kind of microwave heating of food.Microwave oven by
The part composition such as power supply, magnetron, control circuit and cooking cavity.Power supply provides about 4000 volts of high pressure, magnetron to magnetron
Under power supply encourages, continuously generate microwave, then through Wave guide system, be coupled in cooking cavity, thus add hot food.Microwave oven
Power bracket is generally 500～1000 watts.
Heating uniformity is always the characteristic that microwave heating industry is paid close attention to most.All should property ask for solution microwave heating at present
Topic, generally by using stirring sheet, rotating disk, so that food uniformly heats.But, present inventor is realizing the present invention
During find, when a certain group food of microwave-oven-heating (such as, cake), by various effort (such as, stirring sheet, turn
Dish), it can be made uniformly to heat, but under same condition, change another kind of food (such as beef), the most not heating before reproducible
Effect.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of method for heating and controlling for microwave oven, heating control devices and bag
Microwave oven containing this heating control devices, it can realize the uniform heating of different types of food, and can take into account the efficiency of heating surface.
To achieve these goals, a kind of method for heating and controlling for microwave oven of the embodiment of the present invention, the method includes:
Load in the heating chamber of described microwave oven is heated by the microwave source controlling described microwave oven；Described microwave source is altered in steps
Frequency, phase place or frequency and phase combination, to determine N number of standing-wave ratio less than presetting the frequency of standing-wave ratio, phase place or frequency
And phase combination, wherein N is the integer more than 1；And according to determined by N number of frequency, phase place or frequency and phase combination,
Use this N number of frequency, phase place or frequency and phase combination to control described microwave source in turn described load is heated.
Optionally, described N number of standing-wave ratio is being determined less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination
Period, control described microwave source and heat with the load in first output heating chamber to described microwave oven；And at wheel
During stream uses this N number of frequency, phase place or frequency and the phase combination described microwave source of control to heat described load, control
Make described microwave source to heat with the load in second output heating chamber to described microwave oven.
Optionally, described first output is less than described second output.
Optionally, described microwave oven comprises at least two microwave source.
Optionally, described in frequency and the phase combination of this microwave source are altered in steps, determine N number of standing-wave ratio and stay less than presetting
Frequency and the phase combination of Bob include: in a scheduled frequency range, with preset frequency step-length be altered in steps described at least two
The frequency of individual microwave source；After the frequency every time changed, described at least two microwave source is altered in steps with predetermined phase step-length
Phase place；Determine described at least two microwave source standing-wave ratio under each frequency and phase combination；And repeat the above steps, directly
To determining N number of standing-wave ratio less than frequency and the phase combination presetting standing-wave ratio.
Optionally, the method also includes: update described microwave source in described N number of frequency, phase place or frequency and phase combination
In each frequency, phase place or frequency and standing-wave ratio under phase combination；And state N number of frequency, phase place or frequency described
And phase combination is less than the quantity feelings less than predetermined number of the frequency of predetermined standing-wave ratio, phase place or frequency and phase combination
Under condition, re-execute and above-mentioned determine N number of standing-wave ratio less than presetting the frequency of standing-wave ratio, phase place or frequency and the step of phase combination
Suddenly.
Correspondingly, the embodiment of the present invention also provides for a kind of heating control devices for microwave oven, and this equipment includes: detection
Device, for detecting incident power and the reflection power of the microwave source of microwave oven, to determine standing-wave ratio；Control device, be used for holding
The following operation of row: the load in the heating chamber of described microwave oven is heated by the microwave source controlling described microwave oven；Progressively change
Become the frequency of described microwave source, phase place or frequency and phase combination, with determine N number of standing-wave ratio less than preset standing-wave ratio frequency,
Phase place or frequency and phase combination, wherein N is the integer more than 1；And according to determined by N number of frequency, phase place or frequency
And phase combination, use in turn this N number of frequency, phase place or frequency and phase combination control described microwave source to described load into
Row heating.
Optionally, described control device is determining that described N number of standing-wave ratio is less than the default frequency of standing-wave ratio, phase place or frequency
During rate and phase combination, control described microwave source and carry out with the load in first output heating chamber to described microwave oven
Heating；And described control device is using this N number of frequency, phase place or frequency and phase combination to control described microwave source pair in turn
During described load is heated, control described microwave source with the load in second output heating chamber to described microwave oven
Heat.
Optionally, described first output is less than described second output.
Optionally, described microwave oven comprises at least two microwave source.
Optionally, described in frequency and the phase combination of this microwave source are altered in steps, determine N number of standing-wave ratio and stay less than presetting
Frequency and the phase combination of Bob include: in a scheduled frequency range, with preset frequency step-length be altered in steps described at least two
The frequency of individual microwave source；After the frequency every time changed, described at least two microwave source is altered in steps with predetermined phase step-length
Phase place；Determine described at least two microwave source standing-wave ratio under each frequency and phase combination；And repeat the above steps, directly
To determining N number of standing-wave ratio less than frequency and the phase combination presetting standing-wave ratio.
Optionally, described control device is additionally operable to perform following operation: update described microwave source in described N number of frequency, phase
Each frequency, phase place or frequency in position or frequency and phase combination and the standing-wave ratio under phase combination；And state N described
Individual frequency, phase place or frequency and phase combination are less than the frequency of predetermined standing-wave ratio, phase place or frequency and the number of phase combination
Amount less than in the case of predetermined number, re-execute above-mentioned determine N number of standing-wave ratio less than presetting the frequency of standing-wave ratio, phase place or
Frequency and the step of phase combination.
Correspondingly, the embodiment of the present invention also provides for a kind of microwave oven, and this microwave oven comprises above-mentioned heating control devices.
By technique scheme, can by continuous switching frequency, phase place or frequency and phase-group incompatible reach so that
The purpose that heating object uniformly heats.It addition, the determination of said frequencies, phase place or frequency and phase combination considers microwave source
Standing-wave ratio, standing-wave ratio is the lowest, shows that the microwave energy that microwave source is launched is absorbed the most by heating object, and the efficiency of heating surface is more
High；Standing-wave ratio is the highest, shows that the microwave energy that microwave source is launched is absorbed the fewest by heating object, and the efficiency of heating surface is the lowest.Institute is really
N number of frequency, phase place or the frequency made and phase combination are the smaller frequency of standing wave, phase place or frequency and phase-group
Close, therefore use this N number of frequency, phase place or frequency and phase combination can ensure the high efficiency of heating surface.Therefore, the present invention's is above-mentioned
Scheme can solve the microwave-oven-heating problem by load balance factor, can realize uniformly and efficiently heating variety classes food.
Further feature and the advantage of the embodiment of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide and is further appreciated by the embodiment of the present invention, and constitutes a part for description, with under
The detailed description of the invention in face is used for explaining the embodiment of the present invention together, but is not intended that the restriction to the embodiment of the present invention.Attached
In figure:
The flow chart of the method for heating and controlling for microwave oven that Fig. 1 provides for one embodiment of the invention；
Fig. 2 is the method flow diagram of frequency scanning；
Fig. 3 is the method flow diagram of phasescan；
Fig. 4 is frequency and the method flow diagram of phase combination scanning；
The flow chart of the method for heating and controlling for microwave oven that Fig. 5 provides for another embodiment of the present invention；
The flow chart of the method for heating and controlling for microwave oven that Fig. 6 provides for yet another embodiment of the invention；And
The structural representation of the heating control devices for microwave oven that Fig. 7 provides for one embodiment of the invention.
Description of reference numerals
110 detection devices 120 control device
200 microwave sources
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the embodiment of the present invention is described in detail.It should be appreciated that this
Detailed description of the invention described by place is merely to illustrate and explains the embodiment of the present invention, is not limited to the embodiment of the present invention.
The flow chart of the method for heating and controlling for microwave oven that Fig. 1 provides for one embodiment of the invention.As it is shown in figure 1,
The method for heating and controlling for microwave oven that one embodiment of the invention provides, the method includes:
Step S110, the load in the heating chamber of described microwave oven is heated by the microwave source controlling described microwave oven.
Step S120, is altered in steps the frequency of described microwave source, phase place or frequency and phase combination, to determine N number of standing wave
Than less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination, wherein N is the integer more than 1, and such as, N can be
10 or 20 etc., can set according to the requirement of uniformity and efficiency.
Step S130, uses this N number of frequency, phase place or frequency and phase combination to control described microwave source to described in turn
Load is heated.This uses in turn can be unit time-switching one secondary frequencies, phase place or frequency and phase combination, the most often
100 milliseconds of switchings are once.
Each frequency, phase place or frequency and phase combination form the field distribution of correspondence in the heating chamber of microwave oven, as
Fruit is divided into some regions heating chamber, and the electromagnetic field intensity in each region is inconsistent, when phase place, frequency or frequency and phase place
During combination and variation, the electromagnetic field intensity in each region also can change.Corresponding, the heating object temperature of the local placement that field intensity is strong
Rising faster, the temperature rise of the local heating object placed that field intensity is more weak is the slowest (same or close material).Thus, can
Switching frequency, phase place or frequency and the incompatible purpose reaching uniformly to heat of phase-group is obtained so that heating object by continuous.Separately
Outward, the determination of said frequencies, phase place or frequency and phase combination considers the standing-wave ratio of microwave source, and standing-wave ratio is the lowest, shows micro-
The microwave energy that wave source is launched is absorbed the most by heating object, and the efficiency of heating surface is the highest；Standing-wave ratio is the highest, shows that microwave source is launched
Microwave energy absorbed the fewest by heating object, the efficiency of heating surface is the lowest.N number of frequency, phase place or the frequency determined and phase
Bit combination is the smaller frequency of standing wave, phase place or frequency and phase combination, therefore uses this N number of frequency, phase place or frequency
Rate and phase combination can ensure the high efficiency of heating surface.Therefore, the such scheme of the present invention can solve microwave-oven-heating by load balance factor
Problem, can realize variety classes food uniformly and is efficiently heated.
The frequency of described microwave source, phase place or frequency and phase place how are altered in steps below in conjunction with Fig. 2-Fig. 4 introduction
Combination, to determine N number of standing-wave ratio less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination.
Frequency scanning rule
Fig. 2 is the method flow diagram of frequency scanning.As in figure 2 it is shown, this frequency scanning method comprises the steps of
Step S310, the frequency arranging all microwave sources is f=f0(assume initial value f0Scope is 2400～2500MHz),
Phase place is ph0, sweep X=0.Afterwards, semiconductor microwave oven is started.
Step S320, compares sweep X and 100MHz/fstepIf, X ＞ 100MHz/fstep+ 1, then perform step
S270；Otherwise perform step S230.
Step S230, compares frequency f of the most all microwave sources with 2500MHz.As f ＞ 2500MHz, perform step
Rapid S231, f=f-100, perform step S250 afterwards.
Step S240, compares frequency f of the most all microwave sources with 2400MHz.As f ＜ 2400MHz, perform step
Rapid S241, f=f+100, perform step S250 afterwards.
Step S240, measures all microwave sources standing-wave ratio under frequency f.
Step S260, arranges f=f+fstep, X=X+1, repeat above-mentioned steps S220-S240, until frequency sweep is complete
Individual frequency range.
Step S270, is scanning through whole frequency range, after determining the standing-wave ratio under each rate of scanning, can therefrom select
Select the frequency that standing wave is smaller, the such as standing-wave ratio frequency less than predetermined standing-wave ratio.
Consistent with the frequency of all microwave sources above and rate of scanning step-length fstepAll in frequency range of mode
Frequency is scanned, and the present invention is not limited to this, can also be for different microwave source and arranges different frequencies and be scanned, so
More combination of frequency can be obtained, be conducive to improving the fineness of scanning, search out the combination of frequency that standing-wave ratio is less.
Phasescan rule
Fig. 3 is the method flow diagram of phasescan.As shown in Figure 3, it is assumed that microwave oven includes N number of microwave source S1-SN, this N
Individual microwave source S1-SNOperating at the same frequency, this phasescan method comprises the steps of
Step S310, the initial phase arranging all microwave sources is ph0, microwave source SNPhase invariant, as reference.
Step S321, by microwave source SN-1Phase place phN-1With initial phase ph0Compare, if phN-1>=ph0+360, then
Show this microwave source SN-1Phasescan complete, enter step S331；Otherwise enter step S322.
Step S322, uses current phase combination to make semiconductor microwave oven work a period of time, and detects incident power
And reflection power, calculate current standing-wave ratio VSWR.
Step S323, after above-mentioned steps S322 is finished, with phase step phstepChange microwave source SN-1Phase
Position phN-1, microwave source S is setN-1Phase place phN-1=phN-1+phstep, circulation performs above-mentioned steps S321-S322, until micro-
Wave source SN-1Phasescan complete.Afterwards, for next microwave source SN-2Carry out phase change, perform step S331-S333.
Step S331, arranges microwave source SN-2Phase place phN-2=phN-2+phstep, microwave source SN-1Phase place phN-1=ph0。
Step S332, by phase place ph of microwave source SN-2N-2With initial phase ph0Compare, if phN-2≥ph0+ 360, then
Show this microwave source SN-2Phasescan complete, enter step S341；Otherwise enter step S333.
Step S333, uses current phase combination to make semiconductor microwave oven work a period of time, and detects incident power
And reflection power, calculate current standing-wave ratio VSWR.After this step S333 is finished, circulation performs above-mentioned steps
S331-S332, until phN-2≥ph0+ 360, this microwave source SN-2Phasescan complete, afterwards perform step S341.
Step S341, arranges N=N-1, to perform above-mentioned steps S331-S333 for next microwave source, until N=2, institute
The phasescan having microwave source is complete, performs step S350 afterwards.
Standing-wave ratio under step S350, relatively all phase combination, may select from the phase combination that standing wave is smaller, example
If standing-wave ratio is less than the phase combination of predetermined standing-wave ratio.
At least 3 microwave sources and scanning phase step ph are comprised above with microwave ovenstepMode each microwave source is existed
The scanning of all phase place row in whole phase range, when carrying out phasescan for a microwave source, the phase of other microwave sources
Position is initial phase ph0.The present invention is not limited to this, the mode of other phasescans also can be used to be scanned, to obtain more
Many phase combination, are conducive to improving the fineness of scanning, search out the phase combination that standing-wave ratio is less.It should be noted that
For phasescan, microwave oven need to include at least 2 microwave sources, and the frequency of these 2 microwave sources of at least two is consistent
's.
In addition, it is necessary to explanation, referred herein to microwave source quantity N and above-mentioned N number of standing-wave ratio less than presetting standing-wave ratio
Frequency, phase place or frequency and phase combination not same parameters, both and onrelevant.
Frequency and phase combination scanning rule
Fig. 4 is the method flow diagram of frequency and phasescan.As shown in Figure 4, this frequency and phasescan method are substantially
Identical with said frequencies scan method, difference is, in step 450 place, when frequency scanning every time, at all microwave sources
Frequency be f in the case of, call the phasescan rule shown in Fig. 3, thus can determine that staying under frequency and phase combination
Bob, can compare the standing-wave ratio under all frequencies and phase combination, chooses the frequency that standing wave is smaller afterwards at step S470
And phase combination.
The above-mentioned standing-wave ratio mentioned can be calculated by below equation:
VSWR=(1+ the amplitude of reflection coefficient)/(1-the amplitude of reflection coefficient)
The amplitude of reflection coefficient can calculate according to below equation:
Wherein, reflection power sum is the reflection power sum of all microwave sources in referring to microwave oven, described incident power it
With refer to microwave oven in the incident power sum of all microwave sources.The incident power of each microwave source and reflection power all can use
Corresponding measurement apparatus measures.
The flow chart of the method for heating and controlling for microwave oven that Fig. 5 provides for another embodiment of the present invention.Such as Fig. 5 institute
Showing, the method for heating and controlling for microwave oven that another embodiment of the present invention provides includes:
Step S510, controls the microwave source of described microwave oven with in first output heating chamber to described microwave oven
Load is heated.
Step S520, is altered in steps the frequency of described microwave source, phase place or frequency and phase combination, to determine N number of standing wave
Than less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination, wherein N is the integer more than 1, and such as, N can be
10 or 20 etc., can set according to the requirement of uniformity and efficiency.
Step S530, uses this N number of frequency, phase place or frequency and phase combination to control described microwave source with second in turn
Described load is heated by output.This uses in turn can be unit time-switching one secondary frequencies, phase place or frequency and phase
Bit combination, the most every 100 milliseconds of switchings are once.
Thereby, described N number of standing-wave ratio can determined less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination
Period, control described microwave source and heat with the load in first output heating chamber to described microwave oven；And
During using this N number of frequency, phase place or frequency and the phase combination described microwave source of control that described load is heated in turn,
Control described microwave source to heat with the load in second output heating chamber to described microwave oven.Thus at not same order
Load is heated by outputs different for Duan Caiyong.Preferably, described first output is less than described second output
Power, can avoid during determining that described N number of standing-wave ratio is less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination
Big output heating load is used to cause load non-uniform heating.
The flow chart of the method for heating and controlling for microwave oven that Fig. 6 provides for yet another embodiment of the invention.Such as Fig. 5 institute
Showing, the method for heating and controlling for microwave oven that the present invention provides in an embodiment includes:
Step S610, controls the microwave source of described microwave oven with in first output heating chamber to described microwave oven
Load is heated.
Step S620, is altered in steps the frequency of described microwave source, phase place or frequency and phase combination, to determine N number of standing wave
Than less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination, wherein N is the integer more than 1, and such as, N can be
10 or 20 etc., can set according to the requirement of uniformity and efficiency.
Step S630, uses this N number of frequency, phase place or frequency and phase combination to control described microwave source with second in turn
Described load is heated by output.This uses in turn can be unit time-switching one secondary frequencies, phase place or frequency and phase
Bit combination, the most every 100 milliseconds of switchings are once.
Step S640, controls described microwave source with the using this N number of frequency, phase place or frequency and phase combination in turn
During described load is heated by two outputs, detect in each described N number of frequency, phase place or frequency and phase combination
Each frequency, phase place or frequency and phase combination under standing-wave ratio.
Step S650, rejects the frequency higher than predetermined standing-wave ratio from described N number of frequency, phase place or frequency and phase combination
Rate, phase place or frequency and phase combination.
Step S660, it is judged that whether cooking time terminates.In the case of cooking time terminates, the heating of whole microwave oven
Process terminates；In the case of cooking time is unclosed, perform step S670.
Step S670, it is judged that reject higher than predetermined standing-wave ratio from described N number of frequency, phase place or frequency and phase combination
Frequency, phase place or frequency and phase combination after, the remaining frequency less than predetermined standing-wave ratio, phase place or frequency and phase place
Whether the quantity of combination is less than predetermined number, and this predetermined number can be such as N/2.If less than predetermined number, then re-execute
Above-mentioned steps S610-S630, finds N number of standing-wave ratio again less than presetting the frequency of standing-wave ratio, phase place or frequency and phase-group
Close；If greater than or equal to predetermined number, then continue to utilize the remaining frequency less than predetermined standing-wave ratio, phase place or frequency in turn
Described load is heated by rate and the described microwave source of the incompatible control of phase-group with the second output.
By the embodiment shown in Fig. 6, it is ensured that at heating object because being heated and state change, cause heating uniformity
And in the case of the efficiency of heating surface reduces, it is possible to again find rapidly N number of frequency, phase place or frequency and phase-group merging utilizes this N
Individual frequency, phase place or frequency and phase combination perform heating process, thus ensure heating uniformity and the efficiency of heating surface.
The structural representation of the heating control devices for microwave oven that Fig. 7 provides for one embodiment of the invention.Such as Fig. 7 institute
Showing, the heating control devices for microwave oven that north one embodiment of the invention provides includes: detection device 110, is used for detecting micro-
The incident power of the microwave source 200 of ripple stove and reflection power, to determine standing-wave ratio；Control device 120, be used for performing following behaviour
Make: the load in the heating chamber of described microwave oven is heated by the microwave source controlling described microwave oven；It is altered in steps described micro-
The frequency of wave source, phase place or frequency and phase combination, with determine N number of standing-wave ratio less than preset the frequency of standing-wave ratio, phase place or
Frequency and phase combination, wherein N is the integer more than 1；And according to determined by N number of frequency, phase place or frequency and phase-group
Close, use this N number of frequency, phase place or frequency and phase combination to control described microwave source in turn and described load is heated.
Preferably, described control device is determining that described N number of standing-wave ratio is less than the default frequency of standing-wave ratio, phase place or frequency
During rate and phase combination, control described microwave source and carry out with the load in first output heating chamber to described microwave oven
Heating；And described control device is using this N number of frequency, phase place or frequency and phase combination to control described microwave source pair in turn
During described load is heated, control described microwave source with the load in second output heating chamber to described microwave oven
Heat.Wherein, described first output is less than described second output.
Wherein, described microwave oven comprises at least two microwave source.
Wherein, described in frequency and the phase combination of this microwave source are altered in steps, determine N number of standing-wave ratio less than presetting standing wave
Frequency and the phase combination of ratio include: in a scheduled frequency range, described at least two are altered in steps with preset frequency step-length
The frequency of microwave source；After the frequency every time changed, the phase of described at least two microwave source is altered in steps with predetermined phase step-length
Position；Determine described at least two microwave source standing-wave ratio under each frequency and phase combination；And repeat the above steps, until
Determine N number of standing-wave ratio less than frequency and the phase combination presetting standing-wave ratio.
Described control device 120 is additionally operable to perform following operation: update described microwave source described N number of frequency, phase place or
Each frequency, phase place or frequency in frequency and phase combination and the standing-wave ratio under phase combination；And state N number of frequency described
In rate, phase place or frequency and phase combination little less than the quantity of the frequency of predetermined standing-wave ratio, phase place or frequency and phase combination
In the case of predetermined number, re-execute and above-mentioned determine N number of standing-wave ratio less than presetting the frequency of standing-wave ratio, phase place or frequency
And the step of phase combination.
The detail of heating control devices being used for microwave oven about this and benefit, see above-mentioned for for microwave
The description of the method for heating and controlling of stove, repeats no more in this.
Accordingly, the embodiment of the present invention also provides for a kind of microwave oven, and this microwave oven comprises the above-mentioned heating for microwave oven
Control equipment.This microwave oven such as can continuously adjust frequency in 2.4GHz to 2.5GHz, can in-180 ° to+180 ° continuously
Regulation phase place, and there is at least two microwave sources, each microwave source can be operated under same frequency (preferably by same microwave
Signal generator module produces just can accomplish that frequency is identical.This microwave oven can detect reflection power and incident power, can connect
The continuous output regulating all microwave sources, it is possible to analyze, calculate, store, call above-mentioned data (output, frequency, phase
Position, incidence, reflection power etc.), it is possible to regulate microwave heating state according to reflection power, incident power value and (regulate microwave
Operating frequency, phase place, power, break-make etc.).This microwave oven can be semiconductor microwave oven.
The concrete operation method of above-mentioned microwave oven is:
Load is put in the heating chamber of microwave oven.Use semiconductor microwave firing equipment, at the isolation ensured
Under the conditions of (suggestion feed-in mouth isolation between any two less than-15dB), it is proposed that arrange plural on the wall of heating chamber
Feed-in mouth (for feed-in microwave, quantity can be consistent with microwave source quantity).
1, after putting into load in heating chamber, (merit of each microwave source output 10W or 20W is advised first by small-power
Rate) it is scanned and analyzes, in this step, need to find out that N number of (N can be 10 or 20 etc., permissible by changing frequency, phase place
Set according to the requirement of uniformity and efficiency) the frequency plot combination of standing-wave ratio minimum (efficiency of heating surface is the highest).Standing-wave ratio
VSWR can calculate according to the value of incident power, reflection power, VSWR=(1+ the amplitude of reflection coefficient)/(1-reflection coefficient mould
Value).
2, be then use the above the frequency plot combination that N number of standing-wave ratio of finding out is minimum, carry out high-power (can be according to not
Different power grades is selected with the characteristic of food) heating.Update the standing-wave ratio data of this N number of combination simultaneously, and by standing-wave ratio
The combination being unsatisfactory for certain threshold value is removed from N.
3, when have less than N/2 (can set according to uniformity requirement) individual combination standing-wave ratio less than preset standing-wave ratio time,
Reuse small-power and repeat the 1st step.So circulation the 1 to 3rd step, until cooking time terminates.
The optional embodiment of example of the present invention is described in detail above in association with accompanying drawing, but, the embodiment of the present invention does not limit
Detail in above-mentioned embodiment, in the technology concept of the embodiment of the present invention, can be to the embodiment of the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to the protection domain of the embodiment of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various possible compound modes illustrate the most separately.
It will be appreciated by those skilled in the art that all or part of step realizing in above-described embodiment method can be by
Program instructs relevant hardware and completes, and this program is stored in a storage medium, including some instructions with so that one
Individual (can be single-chip microcomputer, chip etc.) or processor (processor) perform the whole of method described in each embodiment of the application
Or part steps.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
Additionally, combination in any can also be carried out between the various different embodiment of the embodiment of the present invention, as long as it is not
Running counter to the thought of the embodiment of the present invention, it should be considered as embodiment of the present invention disclosure of that equally.
Claims (13)
1. the method for heating and controlling for microwave oven, it is characterised in that the method includes:
Load in the heating chamber of described microwave oven is heated by the microwave source controlling described microwave oven；
The frequency of described microwave source, phase place or frequency and phase combination are altered in steps, to determine that N number of standing-wave ratio is stayed less than default
The frequency of Bob, phase place or frequency and phase combination, wherein N is the integer more than 1；And
N number of frequency, phase place or frequency and phase combination determined by according to, use in turn this N number of frequency, phase place or frequency and
Phase combination controls described microwave source and heats described load.
Method for heating and controlling the most according to claim 1, it is characterised in that
During determining that described N number of standing-wave ratio is less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination, control institute
State microwave source to heat with the load in first output heating chamber to described microwave oven；And
Using this N number of frequency, phase place or frequency and phase combination to control described microwave source in turn, described load is heated
Period, control described microwave source and heat with the load in second output heating chamber to described microwave oven.
Method for heating and controlling the most according to claim 2, it is characterised in that described first output is less than described second
Output.
Method for heating and controlling the most according to claim 1, it is characterised in that described microwave oven comprises at least two microwave
Source.
Method for heating and controlling the most according to claim 4, it is characterised in that described in be altered in steps this microwave source frequency and
Phase combination, determines N number of standing-wave ratio and includes less than the frequency and phase combination presetting standing-wave ratio:
In a scheduled frequency range, the frequency of described at least two microwave source is altered in steps with preset frequency step-length；
After the frequency every time changed, the phase place of described at least two microwave source is altered in steps with predetermined phase step-length；
Determine described at least two microwave source standing-wave ratio under each frequency and phase combination；And
Repeat the above steps, until determining N number of standing-wave ratio less than frequency and the phase combination presetting standing-wave ratio.
6. according to the method for heating and controlling described in claim any one of claim 1-5, it is characterised in that the method is also wrapped
Include:
Update the described microwave source each frequency, phase place or frequency in described N number of frequency, phase place or frequency and phase combination
And the standing-wave ratio under phase combination；And
Described state in N number of frequency, phase place or frequency and phase combination less than the frequency of predetermined standing-wave ratio, phase place or frequency and
The quantity of phase combination less than in the case of predetermined number, re-executes and above-mentioned determines N number of standing-wave ratio less than presetting standing-wave ratio
Frequency, phase place or frequency and the step of phase combination.
7. the heating control devices for microwave oven, it is characterised in that this equipment includes:
Detection device, for detecting incident power and the reflection power of the microwave source of microwave oven, to determine standing-wave ratio；
Control device, be used for performing following operation:
Load in the heating chamber of described microwave oven is heated by the microwave source controlling described microwave oven；
The frequency of described microwave source, phase place or frequency and phase combination are altered in steps, to determine that N number of standing-wave ratio is stayed less than default
The frequency of Bob, phase place or frequency and phase combination, wherein N is the integer more than 1；And
N number of frequency, phase place or frequency and phase combination determined by according to, use in turn this N number of frequency, phase place or frequency and
Phase combination controls described microwave source and heats described load.
Heating control devices the most according to claim 7, it is characterised in that
Described control device is determining described N number of standing-wave ratio less than presetting the frequency of standing-wave ratio, phase place or frequency and phase combination
Period, control described microwave source and heat with the load in first output heating chamber to described microwave oven；And
Described control device is using this N number of frequency, phase place or frequency and the phase combination described microwave source of control to described in turn
During load is heated, control described microwave source and carry out with the load in second output heating chamber to described microwave oven
Heating.
Heating control devices the most according to claim 8, it is characterised in that described first output is less than described second
Output.
Method for heating and controlling the most according to claim 7, it is characterised in that described microwave oven comprises at least two microwave
Source.
11. method for heating and controlling according to claim 10, it is characterised in that described in the frequency of this microwave source is altered in steps
And phase combination, determine N number of standing-wave ratio and include less than the frequency and phase combination presetting standing-wave ratio:
In a scheduled frequency range, the frequency of described at least two microwave source is altered in steps with preset frequency step-length；
After the frequency every time changed, the phase place of described at least two microwave source is altered in steps with predetermined phase step-length；
Determine described at least two microwave source standing-wave ratio under each frequency and phase combination；And
Repeat the above steps, until determining N number of standing-wave ratio less than frequency and the phase combination presetting standing-wave ratio.
12. according to the method for heating and controlling described in claim any one of claim 7-11, it is characterised in that control device
It is additionally operable to perform following operation:
Update the described microwave source each frequency, phase place or frequency in described N number of frequency, phase place or frequency and phase combination
And the standing-wave ratio under phase combination；And
Described state in N number of frequency, phase place or frequency and phase combination less than the frequency of predetermined standing-wave ratio, phase place or frequency and
The quantity of phase combination less than in the case of predetermined number, re-executes and above-mentioned determines N number of standing-wave ratio less than presetting standing-wave ratio
Frequency, phase place or frequency and the step of phase combination.
13. 1 kinds of microwave ovens, it is characterised in that this microwave oven comprises according to adding thermal control according to any one of claim 7-12
Control equipment.
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| CN201610817661.2A CN106322453B (en) | 2016-09-12 | 2016-09-12 | For the method for heating and controlling, heating control devices and micro-wave oven of micro-wave oven |
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| CN112567888A (en) * | 2018-08-15 | 2021-03-26 | 伊莱克斯家用电器股份公司 | Method for operating a microwave device |
| CN115137207A (en) * | 2022-07-22 | 2022-10-04 | 广东美的厨房电器制造有限公司 | Heating device, control method and device thereof, and readable storage medium |
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| CN106322453B (en) | 2018-06-08 |
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