CN106322453B - For the method for heating and controlling, heating control devices and micro-wave oven of micro-wave oven - Google Patents
For the method for heating and controlling, heating control devices and micro-wave oven of micro-wave oven Download PDFInfo
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- CN106322453B CN106322453B CN201610817661.2A CN201610817661A CN106322453B CN 106322453 B CN106322453 B CN 106322453B CN 201610817661 A CN201610817661 A CN 201610817661A CN 106322453 B CN106322453 B CN 106322453B
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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 present invention provides a kind of for the method for heating and controlling of micro-wave oven, heating control devices and micro-wave oven comprising the heating control devices, belongs to microwave technical field.The method for heating and controlling for micro-wave oven includes：The microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven is controlled to heat；Frequency, phase or the frequency and phase combination of the microwave source is altered in steps, to determine that N number of standing-wave ratio is less than frequency, phase or the frequency and phase combination of default standing-wave ratio, wherein N is the integer more than 1；And according to identified N number of frequency, phase or frequency and phase combination, the microwave source is controlled to heat the load using N number of frequency, phase or the frequency and phase combination in turn.By the present invention, it can be achieved that different types of food is evenly heated, and can take into account the efficiency of heating surface.
Description
Technical field
The present invention relates to microwave technical fields, and in particular, to a kind of method for heating and controlling for micro-wave oven, heating control
Control equipment and the micro-wave oven comprising the heating control devices.
Background technology
Microwave is a kind of electromagnetic wave, and micro-wave oven is that kitchen range are cooked in a kind of modernization with microwave heating of food.Micro-wave oven by
The part such as power supply, magnetron, control circuit and cooking cavity forms.Power supply provides about 4000 volts of high pressures, magnetron to magnetron
Under power supply excitation, microwave is continuously generated, using Wave guide system, is coupled in cooking cavity, so as to heat food.Micro-wave oven
Power bracket is generally 500~1000 watts.
Heating uniformity is always the characteristic that microwave heating industry is most paid close attention to.At present for solve microwave heating should all property ask
Topic, generally by stirring sheet, turntable is used, so as to be evenly heated food.However, present inventor is realizing the present invention
During find, when a certain group food of microwave stove heat (for example, cake), by various effort (for example, stirring sheet, turn
Disk), it can be evenly heated, but change another food (such as beef) under same condition, then the not heating before reproducible
Effect.
Invention content
The purpose of the embodiment of the present invention is to provide a kind of method for heating and controlling, heating control devices and packet for micro-wave oven
Micro-wave oven containing the heating control devices can realize being evenly heated for 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 micro-wave oven of the embodiment of the present invention, this method include：
The microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven is controlled to heat；The microwave source is altered in steps
Frequency, phase or frequency and phase combination, to determine that N number of standing-wave ratio is less than frequency, phase or the frequency of default standing-wave ratio
And phase combination, wherein N are the integer more than 1；And according to identified N number of frequency, phase or frequency and phase combination,
The microwave source is controlled to heat the load using N number of frequency, phase or the frequency and phase combination in turn.
Optionally, frequency, phase or frequency and phase combination of the N number of standing-wave ratio less than default standing-wave ratio are being determined
Period controls the microwave source to be heated with the load indoor to the heating of the micro-wave oven of the first output power；And it is taking turns
During stream heats the load using N number of frequency, phase or the frequency and the phase combination control microwave source, control
The microwave source is made to heat with the load indoor to the heating of the micro-wave oven of the second output power.
Optionally, first output power is less than second output power.
Optionally, the micro-wave oven includes at least two microwave sources.
Optionally, the frequency and phase combination that the microwave source is altered in steps determines that N number of standing-wave ratio is stayed less than default
The frequency and phase combination of Bobbi include：In a scheduled frequency range, described at least two are altered in steps with preset frequency step-length
The frequency of a microwave source；After the frequency changed every time, at least two microwave source is altered in steps with predetermined phase step-length
Phase；Determine standing-wave ratio of at least two microwave source under each frequency and phase combination；And repeat the above steps, directly
To the frequency and phase combination determined N number of standing-wave ratio and be less than default standing-wave ratio.
Optionally, this method further includes：The microwave source is updated in N number of frequency, phase or frequency and phase combination
In each frequency, phase or frequency and phase combination under standing-wave ratio；And state N number of frequency, phase or frequency described
And it is less than the feelings of preset quantity in phase combination less than the quantity of frequency, phase or the frequency of predetermined standing-wave ratio and phase combination
Under condition, the above-mentioned step for determining N number of standing-wave ratio and being less than frequency, phase or the frequency and phase combination of default standing-wave ratio is re-executed
Suddenly.
Correspondingly, the embodiment of the present invention also provides a kind of heating control devices for micro-wave oven, which includes：Detection
Device, for detecting the incident power of the microwave source of micro-wave oven and reflection power, to determine standing-wave ratio；Control device, for holding
Row is following to be operated：The microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven is controlled to heat；Gradually change
Become frequency, phase or the frequency and phase combination of the microwave source, with determine N number of standing-wave ratio be less than default standing-wave ratio frequency,
Phase or frequency and phase combination, wherein N are the integer more than 1；And according to identified N number of frequency, phase or frequency
And phase combination, in turn using N number of frequency, phase or the frequency and phase combination control the microwave source to it is described load into
Row heating.
Optionally, the control device is determining frequency, phase or frequency of the N number of standing-wave ratio less than default standing-wave ratio
During rate and phase combination, the microwave source is controlled to be carried out with the load indoor to the heating of the micro-wave oven of the first output power
Heating；And the control device is using N number of frequency, phase or the frequency and phase combination to control the microwave source pair in turn
During the load is heated, control the microwave source with the second output power to the indoor load of the heating of the micro-wave oven
It is heated.
Optionally, first output power is less than second output power.
Optionally, the micro-wave oven includes at least two microwave sources.
Optionally, the frequency and phase combination that the microwave source is altered in steps determines that N number of standing-wave ratio is stayed less than default
The frequency and phase combination of Bobbi include：In a scheduled frequency range, described at least two are altered in steps with preset frequency step-length
The frequency of a microwave source；After the frequency changed every time, at least two microwave source is altered in steps with predetermined phase step-length
Phase；Determine standing-wave ratio of at least two microwave source under each frequency and phase combination；And repeat the above steps, directly
To the frequency and phase combination determined N number of standing-wave ratio and be less than default standing-wave ratio.
Optionally, the control device is additionally operable to perform following operation：The microwave source is updated in N number of frequency, phase
Standing-wave ratio under position or each frequency, phase or frequency and phase combination in frequency and phase combination；And state N described
Less than the number of frequency, phase or the frequency of predetermined standing-wave ratio and phase combination in a frequency, phase or frequency and phase combination
In the case that amount is less than preset quantity, re-execute it is above-mentioned determine frequency, phase that N number of standing-wave ratio is less than default standing-wave ratio or
The step of frequency and phase combination.
Correspondingly, the embodiment of the present invention also provides a kind of micro-wave oven, which includes above-mentioned heating control devices.
Through the above technical solutions, it can be reached by constantly obtaining switching frequency, phase or frequency and phase combination
The uniformly heated purpose of heating object.In addition, said frequencies, phase or frequency and the determining of phase combination consider microwave source
Standing-wave ratio, standing-wave ratio is lower, show microwave source transmitting microwave energy absorb more by heating object, the efficiency of heating surface is got over
It is high；Standing-wave ratio is higher, shows that the microwave energy of microwave source transmitting absorbs fewer by heating object, the efficiency of heating surface is lower.Institute is really
N number of frequency, phase or the frequency and phase combination made are the smaller frequency of standing-wave ratio, phase or frequency and phase-group
It closes, therefore the high efficiency of heating surface can be ensured using this N number of frequency, phase or frequency and phase combination.Therefore, it is of the invention above-mentioned
Scheme can solve the problems, such as microwave stove heat by load balance factor, it can be achieved that variety classes food uniformly and efficiently heat.
The other feature and advantage of the embodiment of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is that the embodiment of the present invention is further understood for providing, and a part for constitution instruction, under
The specific embodiment in face is used to explain the embodiment of the present invention, but do not form the limitation to the embodiment of the present invention together.Attached
In figure：
Fig. 1 is the flow chart of the method for heating and controlling for micro-wave oven that one embodiment of the invention provides；
Fig. 2 is the method flow diagram of frequency scanning；
Fig. 3 is the method flow diagram of phasescan；
Fig. 4 is the method flow diagram that frequency and phase combination scan；
Fig. 5 is the flow chart of the method for heating and controlling for micro-wave oven that another embodiment of the present invention provides；
Fig. 6 is the flow chart of the method for heating and controlling for micro-wave oven that yet another embodiment of the invention provides；And
Fig. 7 is the structure diagram of the heating control devices for micro-wave oven that one embodiment of the invention provides.
Reference sign
110 detection device, 120 control device
200 microwave sources
Specific embodiment
The specific embodiment of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, be not intended to restrict the invention embodiment.
Fig. 1 is the flow chart of the method for heating and controlling for micro-wave oven that one embodiment of the invention provides.As shown in Figure 1,
The method for heating and controlling for micro-wave oven that one embodiment of the invention provides, this method include：
Step S110 controls the microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven to heat.
Frequency, phase or the frequency and phase combination of the microwave source is altered in steps in step S120, to determine N number of standing wave
Than frequency, phase or the frequency and phase combination that are less than default standing-wave ratio, wherein N is the integer more than 1, for example, N can be
10 or 20 etc., it can be set according to the requirement to uniformity and efficiency.
Step S130 controls the microwave source to described using N number of frequency, phase or the frequency and phase combination in turn
Load is heated.Use can be one secondary frequencies of unit time-switching, phase or frequency and phase combination in turn for this, such as often
100 milliseconds of switchings are primary.
Each frequency, phase or frequency and phase combination micro-wave oven the corresponding field distribution of heating interior formation, such as
Heating room is divided into several regions by fruit, and the electromagnetic field intensity in each region is inconsistent, when phase, frequency or frequency and phase
During combination variation, the electromagnetic field intensity in each region can also change.Heating object temperature corresponding, that the strong place of field strength is placed
It rises faster, and the temperature of heating object that the weaker place of field strength is placed rises then relatively slow (same or similar substance).It thus can
Reach the uniformly heated purpose of heating object by constantly obtaining switching frequency, phase or frequency and phase combination.Separately
Outside, the determining standing-wave ratio for considering microwave source of said frequencies, phase or frequency and phase combination, standing-wave ratio is lower, shows micro-
The microwave energy of wave source transmitting absorbs more by heating object, and the efficiency of heating surface is higher；Standing-wave ratio is higher, shows that microwave source emits
Microwave energy absorb fewer by heating object, the efficiency of heating surface is lower.N number of frequency, phase or the frequency and phase determined
Bit combination is the smaller frequency of standing-wave ratio, phase or frequency and phase combination, therefore using this N number of frequency, phase or frequency
Rate and phase combination can ensure the high efficiency of heating surface.Therefore, said program of the invention can solve microwave stove heat by load balance factor
The problem of, it can be achieved that variety classes food uniformly and efficiently heat.
Frequency, phase or the frequency and phase of the microwave source how to be altered in steps below in conjunction with Fig. 2-Fig. 4 introductions
Combination, to determine that N number of standing-wave ratio is less than frequency, phase or the frequency and phase combination of default standing-wave ratio.
Frequency scanning rule
Fig. 2 is the method flow diagram of frequency scanning.As shown in Fig. 2, the frequency scanning method comprises the steps of：
Step S310, the frequency for setting all microwave sources are f=f0(assuming that initial value f0Range is in 2400~2500MHz),
Phase is ph0, sweep X=0.Later, start semiconductor microwave oven.
Step S320 compares sweep X and 100MHz/fstepIf X ＞ 100MHz/fstep+ 1, then perform step
S270；Otherwise step S230 is performed.
Step S230 compares the frequency f and 2500MHz of all microwave sources at this time.As f ＞ 2500MHz, step is performed
Rapid S231, f=f-100 perform step S250 later.
Step S240 compares the frequency f and 2400MHz of all microwave sources at this time.As f ＜ 2400MHz, step is performed
Rapid S241, f=f+100 perform step S250 later.
Step S240 measures standing-wave ratio of all microwave sources under frequency f.
Step S260 sets f=f+fstep, X=X+1 repeats above-mentioned steps S220-S240, until frequency sweep is complete
A frequency range.
Step S270 is scanning through entire frequency range, after determining the standing-wave ratio under each scan frequency, can therefrom select
The smaller frequency of standing-wave ratio is selected, such as standing-wave ratio is less than the frequency of predetermined standing-wave ratio.
Above with the frequency of all microwave sources is consistent and scan frequency step-length fstepMode to all in frequency range
Frequency is scanned, and the present invention is not limited thereto, can also be directed to different microwave sources and different frequencies is set to be scanned, in this way
More combination of frequencies can be obtained, is conducive to improve the fineness of scanning, searches out the smaller combination of frequency of standing-wave ratio.
Phasescan rule
Fig. 3 is the method flow diagram of phasescan.As shown in Figure 3, it is assumed that micro-wave oven includes N number of microwave source S1-SN, the N
A microwave source S1-SNIt operates at the same frequency, which comprises the steps of：
Step S310, the initial phase for setting all microwave sources are ph0, microwave source SNPhase invariant, as reference.
Step S321, by microwave source SN-1Phase phN-1With initial phase ph0Compare, if phN-1>=ph0+360, then
Show microwave source SN-1Phasescan finish, enter step S331；Otherwise S322 is entered step.
Step S322 makes semiconductor microwave oven work a period of time, and detect incident power using current phase combination
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, setting microwave source SN-1Phase phN-1=phN-1+phstep, cycle performs above-mentioned steps S321-S322, until micro-
Wave source SN-1Phasescan finish.Later, for next microwave source SN-2To carry out phase change, execution step S331-S333.
Step S331, setting microwave source SN-2Phase phN-2=phN-2+phstep, microwave source SN-1Phase phN-1=ph0。
Step S332, by the phase ph of microwave source SN-2N-2With initial phase ph0Compare, if phN-2≥ph0+ 360, then
Show microwave source SN-2Phasescan finish, enter step S341；Otherwise S333 is entered step.
Step S333 makes semiconductor microwave oven work a period of time, and detect incident power using current phase combination
And reflection power, calculate current standing-wave ratio VSWR.After step S333 is finished, cycle performs above-mentioned steps
S331-S332, until phN-2≥ph0+ 360, microwave source SN-2Phasescan finish, perform step S341 later.
Step S341 sets N=N-1, above-mentioned steps S331-S333 is performed to be directed to next microwave source, until N=2, institute
The phasescan for having microwave source finishes, and performs step S350 later.
Step S350, the standing-wave ratio under more all phase combinations, may select from the smaller phase combination of standing-wave ratio, example
As standing-wave ratio is less than the phase combination of predetermined standing-wave ratio.
At least three microwave source and scanning phase step ph are included with micro-wave oven abovestepMode exist to each microwave source
The scanning of all phase rows in entire 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 thereto, and the mode that other phasescans also can be used is scanned, to obtain more
More phase combinations is conducive to improve the fineness of scanning, searches out the smaller phase combination of standing-wave ratio.It should be noted that
For phasescan, micro-wave oven need to include at least 2 microwave sources, and the frequency of at least two 2 microwave sources is consistent
's.
In addition, it is necessary to explanation, microwave source quantity N mentioned herein is less than default standing-wave ratio with above-mentioned N number of standing-wave ratio
Frequency, phase or frequency and phase combination be not same parameters, the two and onrelevant.
Frequency and phase combination scanning rule
Fig. 4 is the method flow diagram of frequency and phasescan.As shown in figure 4, the frequency and phasescan method are substantially
Identical with said frequencies scan method, the difference lies at step 450, in each frequency scanning, in all microwave sources
Frequency in the case of f, to call phasescan rule shown in Fig. 3, so as to can determine that staying under frequency and phase combination
Bobbi, later can be at step S470, the standing-wave ratio under more all frequencies and phase combination, chooses the smaller frequency of standing-wave ratio
And phase combination.
The above-mentioned standing-wave ratio referred to can be calculated by the following formula：
VSWR=(1+ the amplitude of reflection coefficient)/(1- the amplitude of reflection coefficient)
The amplitude of reflection coefficient can be calculated according to the following formula：
Wherein, the sum of reflection power refers to the sum of reflection power of all microwave sources in micro-wave oven, the incident power it
With the sum of incident power of all microwave sources in reference micro-wave oven.The incident power and reflection power of each microwave source can be used
Corresponding measuring device measures.
Fig. 5 is the flow chart of the method for heating and controlling for micro-wave oven that another embodiment of the present invention provides.Such as Fig. 5 institutes
Show, the method for heating and controlling for micro-wave oven that another embodiment of the present invention provides includes：
Step S510 controls the microwave source of the micro-wave oven indoor to the heating of the micro-wave oven with the first output power
Load is heated.
Frequency, phase or the frequency and phase combination of the microwave source is altered in steps in step S520, to determine N number of standing wave
Than frequency, phase or the frequency and phase combination that are less than default standing-wave ratio, wherein N is the integer more than 1, for example, N can be
10 or 20 etc., it can be set according to the requirement to uniformity and efficiency.
Step S530 controls the microwave source with second using N number of frequency, phase or the frequency and phase combination in turn
Output power heats the load.Use can be one secondary frequencies of unit time-switching, phase or frequency and phase in turn for this
Bit combination, such as every 100 milliseconds of switchings are primary.
Thereby, frequency, phase or frequency and phase combination of the N number of standing-wave ratio less than default standing-wave ratio can determined
Period controls the microwave source to be heated with the load indoor to the heating of the micro-wave oven of the first output power；And
During being heated in turn using N number of frequency, phase or the frequency and the phase combination control microwave source to the load,
The microwave source is controlled to be heated with the load indoor to the heating of the micro-wave oven of the second output power.So as in not same order
Output powers different Duan Caiyong come to load heat.Preferably, first output power is less than the described second output
Power can be avoided during determining that N number of standing-wave ratio is less than frequency, phase or the frequency and phase combination of presetting standing-wave ratio
Load non-uniform heating is caused using big output power heating load.
Fig. 6 is the flow chart of the method for heating and controlling for micro-wave oven that yet another embodiment of the invention provides.Such as Fig. 5 institutes
Show, the present invention includes in the method for heating and controlling for micro-wave oven that an embodiment provides：
Step S610 controls the microwave source of the micro-wave oven indoor to the heating of the micro-wave oven with the first output power
Load is heated.
Frequency, phase or the frequency and phase combination of the microwave source is altered in steps in step S620, to determine N number of standing wave
Than frequency, phase or the frequency and phase combination that are less than default standing-wave ratio, wherein N is the integer more than 1, for example, N can be
10 or 20 etc., it can be set according to the requirement to uniformity and efficiency.
Step S630 controls the microwave source with second using N number of frequency, phase or the frequency and phase combination in turn
Output power heats the load.Use can be one secondary frequencies of unit time-switching, phase or frequency and phase in turn for this
Bit combination, such as every 100 milliseconds of switchings are primary.
Step S640 controls the microwave source with the using N number of frequency, phase or the frequency and phase combination in turn
During two output powers heat the load, in each N number of frequency of detection, phase or frequency and phase combination
Each frequency, phase or frequency and phase combination under standing-wave ratio.
Step S650 rejects the frequency higher than predetermined standing-wave ratio from N number of frequency, phase or frequency and phase combination
Rate, phase or frequency and phase combination.
Step S660, judges whether cooking time terminates.In the case where cooking time terminates, the heating of entire micro-wave oven
Process terminates；It is unclosed in cooking time, perform step S670.
Step S670 judges to reject higher than predetermined standing-wave ratio from N number of frequency, phase or frequency and phase combination
Frequency, phase or frequency and phase combination after, remaining frequency, phase or frequency and phase less than predetermined standing-wave ratio
Whether the quantity of combination is less than preset quantity, which may be, for example, N/2.If less than preset quantity, then re-execute
Above-mentioned steps S610-S630 finds frequency, phase or frequency and phase-group that N number of standing-wave ratio is less than default standing-wave ratio again
It closes；If greater than or equal to preset quantity, then continue in turn using remaining less than the frequency of predetermined standing-wave ratio, phase or frequency
Rate and phase combination control the microwave source to be heated with the second output power to the load.
Pass through embodiment shown in fig. 6, it is ensured that in heating object when by heating state change, lead to heating uniformity
And in the case that the efficiency of heating surface reduces, N number of frequency, phase or frequency can be found again rapidly and phase-group merging utilizes the N
A frequency, phase or frequency and phase combination perform heating process, so as to ensure heating uniformity and the efficiency of heating surface.
Fig. 7 is the structure diagram of the heating control devices for micro-wave oven that one embodiment of the invention provides.Such as Fig. 7 institutes
Show, the heating control devices for micro-wave oven that northern one embodiment of the invention provides include：Detection device 110, it is micro- for detecting
The incident power and reflection power of the microwave source 200 of wave stove, to determine standing-wave ratio；Control device 120, for performing following behaviour
Make：The microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven is controlled to heat；It is altered in steps described micro-
Frequency, phase or the frequency and phase combination of wave source, with determine N number of standing-wave ratio be less than the frequency of default standing-wave ratio, phase or
Frequency and phase combination, wherein N are the integer more than 1；And according to identified N number of frequency, phase or frequency and phase-group
It closes, the microwave source is controlled to heat the load using N number of frequency, phase or the frequency and phase combination in turn.
Preferably, the control device is determining frequency, phase or frequency of the N number of standing-wave ratio less than default standing-wave ratio
During rate and phase combination, the microwave source is controlled to be carried out with the load indoor to the heating of the micro-wave oven of the first output power
Heating；And the control device is using N number of frequency, phase or the frequency and phase combination to control the microwave source pair in turn
During the load is heated, control the microwave source with the second output power to the indoor load of the heating of the micro-wave oven
It is heated.Wherein, first output power is less than second output power.
Wherein, the micro-wave oven includes at least two microwave sources.
Wherein, the frequency and phase combination that the microwave source is altered in steps determines that N number of standing-wave ratio is less than default standing wave
The frequency and 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 changed every time, the phase of at least two microwave source is altered in steps with predetermined phase step-length
Position；Determine standing-wave ratio of at least two microwave source under each frequency and phase combination；And repeat the above steps, until
Determine that N number of standing-wave ratio is less than the frequency and phase combination of default standing-wave ratio.
The control device 120 is additionally operable to perform following operation：Update the microwave source N number of frequency, phase or
The standing-wave ratio under each frequency, phase or frequency and phase combination in frequency and phase combination；And state N number of frequency described
Quantity in rate, phase or frequency and phase combination less than frequency, phase or the frequency of predetermined standing-wave ratio and phase combination is small
In the case of preset quantity, above-mentioned frequency, phase or the frequency for determining N number of standing-wave ratio and being less than default standing-wave ratio is re-executed
And the step of phase combination.
Detail and benefit in relation to the heating control devices for being used for micro-wave oven see above-mentioned be directed to for microwave
The description of the method for heating and controlling of stove, repeats no more in this.
Correspondingly, the embodiment of the present invention also provides a kind of micro-wave oven, which includes the above-mentioned heating for micro-wave oven
Control device.The micro-wave oven can for example continuously adjust frequency in 2.4GHz to 2.5GHz, can be continuous in -180 ° to+180 °
Phase is adjusted, and at least there are two microwave source, each microwave source can be operated under identical frequency (preferably by same microwave
Signal generator module generation can just accomplish that frequency is identical.The micro-wave oven can detect reflection power and incident power, can connect
The continuous output power for adjusting all microwave sources, can analyze, calculate, storing, calling above-mentioned data (output power, frequency, phase
Position, incidence, reflection power etc.), can microwave (be adjusted to adjust microwave heating state according to reflection power, incident power value
Working frequency, phase, power, break-make etc.).The micro-wave oven can be semiconductor microwave oven.
The concrete operation method of above-mentioned micro-wave oven is：
Load is put into the heating interior of micro-wave oven.Using semiconductor microwave heating equipment, in the isolation ensured
Under the conditions of (it is recommended that the isolation of feed-in mouth between any two be less than -15dB), it is proposed that set on the wall of heating room more than two
Feed-in mouth (for feed-in microwave, quantity can be consistent with microwave source quantity).
1st, after load is put into heating room, first using small-power (it is recommended that the work(of each microwave source output 10W or 20W
Rate) it is scanned and analyzes, it in this step, needs by changing frequency, phase finds out that N number of (N can be 10 or 20 etc., can be with
Set according to the requirement to uniformity and efficiency) the frequency plot combination of standing-wave ratio minimum (efficiency of heating surface highest).Standing-wave ratio
VSWR can be calculated according to incident power, the value of reflection power, VSWR=(1+ the amplitude of reflection coefficient)/(1- reflectance factor moulds
Value).
It 2 and then is combined using the frequency plot of N number of standing-wave ratio minimum found out above, progress is high-power (can be according to not
Characteristic with food selects different power grades) heating.Update the standing-wave ratio data of this N number of combination simultaneously, and by standing-wave ratio
The combination for being unsatisfactory for certain threshold value is removed from N.
3rd, when there is the standing-wave ratio less than N/2 (being set according to uniformity requirement) a combination to be less than default standing-wave ratio,
It reuses small-power and repeats the 1st step.So the 1 to 3rd step of cycle, until cooking time terminates.
The optional embodiment of example of the present invention, still, the embodiment of the present invention and unlimited are described in detail above in association with attached drawing
Detail in the above embodiment, can be to the embodiment of the present invention in the range of the technology design of the embodiment of the present invention
Technical solution carry out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
It will be appreciated by those skilled in the art that all or part of the steps of the method in the foregoing embodiments are can to pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, is used including some instructions so that one
A (can be microcontroller, chip etc.) or processor (processor) perform the whole of each embodiment the method for the application
Or part steps.And aforementioned storage medium includes：USB flash disk, mobile hard disk, 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.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, should equally be considered as disclosure of that of the embodiment of the present invention.
Claims (9)
1. a kind of method for heating and controlling for micro-wave oven, which is characterized in that this method includes：
The microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven is controlled to heat；
Frequency, phase or the frequency and phase combination of the microwave source is altered in steps, to determine that N number of standing-wave ratio is stayed less than default
Frequency, phase or the frequency and phase combination of Bobbi, wherein N are the integer more than 1；And
According to identified N number of frequency, phase or frequency and phase combination, in turn using N number of frequency, phase or the frequency and
Phase combination controls the microwave source to heat the load,
During frequency, phase or the frequency and phase combination for determining N number of standing-wave ratio and being less than default standing-wave ratio, control
The microwave source is made to heat with the load indoor to the heating of the micro-wave oven of the first output power；And make in turn described
During being heated with N number of frequency, phase or the frequency and the phase combination control microwave source to the load, institute is controlled
Microwave source is stated to heat with the load indoor to the heating of the micro-wave oven of the second output power, wherein, first output
Power is less than second output power.
2. method for heating and controlling according to claim 1, which is characterized in that the micro-wave oven includes at least two microwaves
Source.
3. method for heating and controlling according to claim 2, which is characterized in that the frequency that the microwave source is altered in steps and
Phase combination determines that N number of standing-wave ratio is less than the frequency of default standing-wave ratio and phase combination includes：
In a scheduled frequency range, the frequency of at least two microwave source is altered in steps with preset frequency step-length；
After the frequency changed every time, the phase of at least two microwave source is altered in steps with predetermined phase step-length；
Determine standing-wave ratio of at least two microwave source under each frequency and phase combination；And
It repeats the above steps, until determining that N number of standing-wave ratio is less than the frequency and phase combination of default standing-wave ratio.
4. according to the method for heating and controlling described in any one of claim 1-3 claims, which is characterized in that this method is also wrapped
It includes：
Update each frequency, phase or frequency of the microwave source in N number of frequency, phase or frequency and phase combination
And the standing-wave ratio under phase combination；And
It is less than frequency, phase or the frequency and phase of predetermined standing-wave ratio in N number of frequency, phase or frequency and phase combination
In the case that the quantity of bit combination is less than preset quantity, the above-mentioned frequency for determining N number of standing-wave ratio and being less than default standing-wave ratio is re-executed
The step of rate, phase or frequency and phase combination.
5. a kind of heating control devices for micro-wave oven, which is characterized in that the equipment includes：
Detection device, for detecting the incident power of the microwave source of micro-wave oven and reflection power, to determine standing-wave ratio；
Control device, for performing the following operations：
The microwave source load indoor to the heating of the micro-wave oven of the micro-wave oven is controlled to heat；
Frequency, phase or the frequency and phase combination of the microwave source is altered in steps, to determine that N number of standing-wave ratio is stayed less than default
Frequency, phase or the frequency and phase combination of Bobbi, wherein N are the integer more than 1；And
According to identified N number of frequency, phase or frequency and phase combination, in turn using N number of frequency, phase or the frequency and
Phase combination controls the microwave source to heat the load,
Wherein, the control device is determining frequency, phase or frequency and phase of the N number of standing-wave ratio less than default standing-wave ratio
During bit combination, the microwave source is controlled to be heated with the load indoor to the heating of the micro-wave oven of the first output power；
And the control device is using N number of frequency, phase or the frequency and phase combination to control the microwave source to described negative in turn
During being loaded into row heating, the microwave source is controlled to add with the load indoor to the heating of the micro-wave oven of the second output power
Heat, wherein, first output power is less than second output power.
6. heating control devices according to claim 5, which is characterized in that the micro-wave oven includes at least two microwaves
Source.
7. heating control devices according to claim 6, which is characterized in that the frequency that the microwave source is altered in steps and
Phase combination determines that N number of standing-wave ratio is less than the frequency of default standing-wave ratio and phase combination includes：
In a scheduled frequency range, the frequency of at least two microwave source is altered in steps with preset frequency step-length；
After the frequency changed every time, the phase of at least two microwave source is altered in steps with predetermined phase step-length；
Determine standing-wave ratio of at least two microwave source under each frequency and phase combination；And
It repeats the above steps, until determining that N number of standing-wave ratio is less than the frequency and phase combination of default standing-wave ratio.
8. according to the heating control devices described in any one of claim 5-7 claims, which is characterized in that control device is also
For performing the following operations：
Update each frequency, phase or frequency of the microwave source in N number of frequency, phase or frequency and phase combination
And the standing-wave ratio under phase combination；And
It is less than frequency, phase or the frequency and phase of predetermined standing-wave ratio in N number of frequency, phase or frequency and phase combination
In the case that the quantity of bit combination is less than preset quantity, the above-mentioned frequency for determining N number of standing-wave ratio and being less than default standing-wave ratio is re-executed
The step of rate, phase or frequency and phase combination.
9. a kind of micro-wave oven, which is characterized in that the micro-wave oven includes the computer heating control according to any one of claim 5-8
Equipment.
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| CN112567888B (en) * | 2018-08-15 | 2023-03-28 | 伊莱克斯家用电器股份公司 | Method for operating a microwave device |
| CN111669859B (en) * | 2019-03-08 | 2023-05-02 | 九阳股份有限公司 | Semiconductor microwave heating equipment and control method thereof |
| CN110081475B (en) * | 2019-04-30 | 2020-09-01 | 广东美的厨房电器制造有限公司 | Control method and system of microwave oven and microwave oven |
| 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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