CN106369644A - Semiconductor microwave oven and heating control method and device thereof - Google Patents
Semiconductor microwave oven and heating control method and device thereof Download PDFInfo
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- CN106369644A CN106369644A CN201610973539.4A CN201610973539A CN106369644A CN 106369644 A CN106369644 A CN 106369644A CN 201610973539 A CN201610973539 A CN 201610973539A CN 106369644 A CN106369644 A CN 106369644A
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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
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Abstract
The invention discloses a semiconductor microwave oven and a heating control method and device thereof. The method comprises the following steps: acquiring an initial minimum standing-wave ratio Xth in a heating chamber of the semiconductor microwave oven; adjusting frequencies and phases of a microwave source in the semiconductor microwave oven to acquire corresponding frequency and phase combinations when the standing-wave ratio in the heating chamber is smaller than Xth, and acquiring the number of the frequency and phase combinations; judging whether the number of the corresponding frequency and phase combinations is in a preset number section [Nmin, Nmax] of the frequency and phase combinations or not when the standing-wave ratio is smaller than Xth; if the number of the corresponding frequency and phase combinations is not in the preset number section [Nmin, Nmax] of the frequency and phase combinations when the standing-wave ratio is smaller than Xth, adjusting Xth so as to enable the number of the corresponding frequency and phase combinations is in [Nmin, Nmax] when the standing-wave ratio is smaller than adjusted Xth; and controlling heating of the semiconductor microwave oven according to the corresponding frequency and phase combinations when the standing-wave ratio is smaller than adjusted Xth. By the method, different foods can be heated uniformly, working efficiency and user experiences of the semiconductor microwave oven are improved, and meanwhile, the development period of the microwave oven is shortened effectively.
Description
Technical field
The present invention relates to household electrical appliance technical field, particularly to a kind of method for heating and controlling of semiconductor microwave oven, one
Plant the heating control apparatus of semiconductor microwave oven and a kind of semiconductor microwave oven.
Background technology
With making rapid progress of semiconductor microactuator wave technology development, the microwave efficiency more and more higher of current quasiconductor, cost are got over
Come that increasingly lighter, unit volume the power density of lower, weight is increasing, its application on microwave oven is semiconductor microwave
The inexorable trend of technology development.
In correlation technique, microwave oven is by magnetron microwave, and by controlling stirring sheet or turntable rotation etc., makes
Food thermally equivalent.But, under identical control condition, hot food to be added is different, and heating reached effect can be different,
For example, when hot food to be added is cake, cake thermally equivalent can be made by controlling stirring sheet or rotating disk, but identical shape
Under state, when hot food to be added switches to beef, but not heats before reproducible, this not only can increase holding of microwave oven
The cycle of sending out, and heats are unsatisfactory.
Content of the invention
It is contemplated that at least solving one of technical problem in above-mentioned technology to a certain extent.
For this reason, it is an object of the present invention to proposing a kind of method for heating and controlling of semiconductor microwave oven, by adjusting
In semiconductor microwave oven, the frequency of microwave source and phase place obtain the indoor standing-wave ratio of heating and are less than corresponding frequency plot during xth
Combination, and computer heating control is carried out to semiconductor microwave oven according to frequency plot combination, it is achieved thereby that uniform to different foods
Heating, improves work efficiency and the Consumer's Experience of semiconductor microwave oven, effectively reduces the construction cycle of microwave oven simultaneously.
Further object is that proposing a kind of heating control apparatus of semiconductor microwave oven.
A further object of the present invention is to propose a kind of semiconductor microwave oven.
To achieve these goals, one aspect of the present invention embodiment proposes a kind of computer heating control side of semiconductor microwave oven
Method, comprises the following steps: the initial minimum standing wave obtaining the heating interior of described semiconductor microwave oven compares xth；By adjusting institute
State the frequency of microwave source and phase place in semiconductor microwave oven corresponding less than during xth to obtain the indoor standing-wave ratio of described heating
Frequency plot combines, and obtains the number that described standing-wave ratio is less than corresponding frequency plot combination during xth；Judge described standing wave
Whether it is in the individual number interval of default frequency plot combination than the number less than corresponding frequency plot combination during xth
[nmin, nmax]；If described standing-wave ratio be less than corresponding frequency plot combination during xth number be not in [nmin,
Nmax], then by adjust xth so that when described standing-wave ratio is less than the xth after adjusting corresponding frequency plot combination number
It is in [nmin, nmax]；It is less than corresponding frequency plot combination during the xth after adjusting partly to lead to described according to described standing-wave ratio
Body microwave oven carries out computer heating control.
The method for heating and controlling of semiconductor microwave oven according to embodiments of the present invention, obtains adding of semiconductor microwave oven first
Initial minimum standing wave in hot cell than xth, then, by adjusting the frequency of microwave source and phase place in semiconductor microwave oven, to obtain
Take the indoor standing-wave ratio of heating to be less than corresponding frequency plot combination during xth, and it is corresponding less than during xth to obtain standing-wave ratio
The number of frequency plot combination.Judge whether standing-wave ratio is in less than the number of corresponding frequency plot combination during xth default
Frequency plot combination individual number interval [nmin, nmax], if it is not, then by adjust xth so that standing-wave ratio less than regulation after
Xth when corresponding frequency plot combination number be in [nmin, nmax], finally, be less than according to standing-wave ratio after adjusting
Corresponding frequency plot combination during xth carries out computer heating control to semiconductor microwave oven.Thus realizing uniform to different foods
Heating, improves work efficiency and the Consumer's Experience of semiconductor microwave oven, effectively reduces the construction cycle of microwave oven simultaneously.
According to one embodiment of present invention, by adjust xth so that described standing-wave ratio be less than adjust after xth when institute right
The number of the frequency plot combination answered is in [nmin, nmax], comprising: the corresponding frequency when described standing-wave ratio is less than xth
When the number of phase combination is more than nmax, xth is carried out reduce regulation with default step-length, until described standing-wave ratio is less than after adjusting
Xth when corresponding frequency plot combination number be in [nmin, nmax]；It is corresponding when described standing-wave ratio is less than xth
The number of frequency plot combination when being less than nmin, xth is carried out increase with described default step-length and adjusts, until described standing-wave ratio
The number being less than corresponding frequency plot combination during the xth after adjusting is in [nmin, nmax].
According to one embodiment of present invention, when xth being carried out increase with regulation with described default step-length, after also judging to adjust
Xth whether more than default coupling fault standing-wave ratio threshold value, wherein, if the xth after adjusting is more than default coupling fault
Standing-wave ratio threshold value, then send coupling fault cues, and controls described semiconductor microwave oven to quit work.
According to one embodiment of present invention, the frequency plot corresponding when described standing-wave ratio is less than xth combination is individual
When number is in [nmin, nmax], directly corresponding frequency plot combination during xth is less than according to described standing-wave ratio and partly leads to described
Body microwave oven carries out computer heating control.
According to one embodiment of present invention, when computer heating control is carried out to described semiconductor microwave oven, also by removal
Described standing-wave ratio is more than or equal to corresponding frequency plot during the xth after adjusting and is less than after regulation with updating described standing-wave ratio
Corresponding frequency plot combination during xth.
According to one embodiment of present invention, the frequency of described microwave source can continuously may be used between 2.4ghz to 2.5ghz
Adjust, the phase place of described microwave source can between -180 ° to+180 ° continuously adjustabe.
According to one embodiment of present invention, described microwave source can be multiple, the operating frequency of each described microwave source
Keep identical.
To achieve these goals, the computer heating control of a kind of semiconductor microwave oven that another aspect of the present invention embodiment proposes
Device, comprising: acquisition module, the indoor initial minimum standing wave of the heating for obtaining described semiconductor microwave oven is than xth, and leads to
Overregulate in described semiconductor microwave oven the frequency of microwave source and phase place with when obtaining the indoor standing-wave ratio of described heating and being less than xth
Corresponding frequency plot combination, and obtain the number that described standing-wave ratio is less than corresponding frequency plot combination during xth；Sentence
Disconnected module, for judging whether described standing-wave ratio is in default frequency less than the number of corresponding frequency plot combination during xth
The individual number interval [nmin, nmax] of rate phase combination；Adjustment module, for the frequency corresponding when described standing-wave ratio is less than xth
The number of rate phase combination be not in when [nmin, nmax] by adjust xth so that described standing-wave ratio be less than adjust after xth when
The number of corresponding frequency plot combination is in [nmin, nmax]；Heating control module, for being less than according to described standing-wave ratio
During xth after regulation, the combination of corresponding frequency plot carries out computer heating control to described semiconductor microwave oven.
The heating control apparatus of semiconductor microwave oven according to embodiments of the present invention, obtain semiconductor microactuator by acquisition module
The initial minimum standing wave of the heating interior of ripple stove is than xth, and the frequency by microwave source in regulation semiconductor microwave oven and phase place
It is less than corresponding frequency plot combination during xth to obtain the indoor standing-wave ratio of heating, and obtains standing-wave ratio and be less than xth when institute
The number of corresponding frequency plot combination.Judge module judges that standing-wave ratio is less than the individual of corresponding frequency plot combination during xth
Whether number is in the individual number interval [nmin, nmax] of default frequency plot combination, if it is not, then being adjusted by adjustment module
Xth so that the number that standing-wave ratio is less than corresponding frequency plot combination during the xth after adjusting is in [nmin, nmax], then,
Heating control module is less than corresponding frequency plot combination during the xth after adjusting according to standing-wave ratio and semiconductor microwave oven is carried out
Computer heating control.Thus realizing the uniform heating to different foods, improve work efficiency and the Consumer's Experience of semiconductor microwave oven,
Effectively reduce the construction cycle of microwave oven simultaneously.
According to one embodiment of present invention, the frequency plot corresponding when described standing-wave ratio is less than xth combination is individual
When number is more than nmax, described adjustment module carries out to xth reducing regulation with default step-length, until described standing-wave ratio is less than after adjusting
Xth when corresponding frequency plot combination number be in [nmin, nmax]；It is corresponding when described standing-wave ratio is less than xth
Frequency plot combination number be less than nmin when, described adjustment module with described default step-length xth is carried out increase adjust, directly
The number being less than corresponding frequency plot combination during the xth after adjusting to described standing-wave ratio is in [nmin, nmax].
According to one embodiment of present invention, described judge module is additionally operable to, in described adjustment module with described default step
Length carries out to xth increasing whether the xth after judging when adjusting to adjust mates fault standing-wave ratio threshold value more than default, wherein, such as
Xth after fruit is adjusted is more than default coupling fault standing-wave ratio threshold value, and described heating control module then controls described semiconductor microactuator
Ripple stove sends coupling fault cues, and controls described semiconductor microwave oven to quit work.
According to one embodiment of present invention, the frequency plot corresponding when described standing-wave ratio is less than xth combination is individual
When number is in [nmin, nmax], described heating control module is directly less than corresponding frequency phase during xth according to described standing-wave ratio
Bit combination carries out computer heating control to described semiconductor microwave oven.
According to one embodiment of present invention, described heating control module is additionally operable to, and described semiconductor microwave oven is being entered
Pass through during row computer heating control to remove corresponding frequency plot when described standing-wave ratio is more than or equal to the xth after adjusting update described
Standing-wave ratio is less than corresponding frequency plot combination during the xth after adjusting.
According to one embodiment of present invention, the frequency of described microwave source can continuously may be used between 2.4ghz to 2.5ghz
Adjust, the phase place of described microwave source can between -180 ° to+180 ° continuously adjustabe.
According to one embodiment of present invention, described microwave source can be multiple, the operating frequency of each described microwave source
Keep identical.
Additionally, embodiments of the invention also proposed a kind of semiconductor microwave oven, it includes above-mentioned semiconductor microwave oven
Heating control apparatus.
Semiconductor microwave oven according to embodiments of the present invention, by above-mentioned heating control apparatus, can be by adjusting half
In conductor microwave oven, the frequency of microwave source and phase place obtain the indoor standing-wave ratio of heating and are less than corresponding frequency plot group during xth
Closing, computer heating control is carried out to semiconductor microwave oven, thus realizing the uniform heating to different foods, improve semiconductor microwave oven
Work efficiency and Consumer's Experience, effectively reduce the construction cycle of microwave oven simultaneously.
Brief description
Fig. 1 is the flow chart of the method for heating and controlling of semiconductor microwave oven according to embodiments of the present invention；
Fig. 2 is the flow chart of the method for heating and controlling of semiconductor microwave oven according to an embodiment of the invention；And
Fig. 3 is the block diagram of the heating control apparatus of semiconductor microwave oven according to embodiments of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
To describe with reference to the accompanying drawings proposition according to embodiments of the present invention the method for heating and controlling of semiconductor microwave oven, half
The heating control apparatus of conductor microwave oven and the semiconductor microwave oven with this device.
Fig. 1 is the flow chart of the method for heating and controlling of semiconductor microwave oven according to embodiments of the present invention.As shown in figure 1,
The method for heating and controlling of this semiconductor microwave oven can comprise the following steps that
S1, the initial minimum standing wave obtaining the heating interior of semiconductor microwave oven compares xth.
Specifically, standing-wave ratio refers to the ratio of standing wave antinode voltage and peak voltage amplitude.In incidence wave and echo phase
Position identical is local, and voltage amplitude adds up to maximum voltage amplitude vmax, forms antinode；In incidence wave and echo opposite in phase
Local voltage amplitude phase be kept to minimum voltage amplitude vmin, form trough.Standing-wave ratio is the voltage magnitude at standing wave antinode
The ratio of the voltage magnitude vmin at vmax and trough.From the perspective of power, standing-wave ratio can be according to incident power and reflection
Power calculated it may be assumed that
Wherein, swr is standing-wave ratio, r and r is respectively output impedance and input impedance, and k is reflection coefficient,
S2, obtains the indoor standing-wave ratio of heating and is less than by adjusting the frequency of microwave source and phase place in semiconductor microwave oven
Corresponding frequency plot combination during xth, and obtain the number that standing-wave ratio is less than corresponding frequency plot combination during xth.
In an embodiment of the present invention, microwave source can be multiple, and the operating frequency of each microwave source keeps identical.
Specifically, when microwave source has multiple, multiple microwave feedbacks can be arranged on the wall of the heating chamber of microwave oven
Entrance, the number of microwave feed-in mouth is identical with the number of microwave source, and ensures have between each microwave feed-in mouth preferably
Isolation (typically under conditions of ensureing preferable isolation, isolation is less than -15db as far as possible), in addition, in order to ensure each
The operating frequency of microwave source keeps identical, can produce microwave by a microwave signal generation module.
According to one embodiment of present invention, the frequency of microwave source can between 2.4ghz to 2.5ghz continuously adjustabe,
The phase place of microwave source can between -180 ° to+180 ° continuously adjustabe, specifically can be set according to practical situation.
Specifically, after semiconductor microwave oven works on power, semiconductor microwave oven can be first controlled to run with small-power,
For example, it is possible to control the output of each microwave source to be 10w or 20w.Then the electromagnetic wave indoor to heating be scanned with
Analyze, in the process, the frequency of constantly regulate microwave source and phase place, for example, the frequency of microwave source can in 2.4ghz extremely
Consecutive variations between 2.5ghz, the phase place of microwave source can between -180 ° to+180 ° consecutive variations.Meanwhile, calculate accordingly
The indoor standing-wave ratio of heating, and judge whether this standing-wave ratio is less than xth, if it is less, enumerator adds 1.When to microwave source
After the completion of frequency and phase adjusted, it is possible to obtain the indoor standing-wave ratio of all heating is less than corresponding frequency plot group during xth
Close and number.For the ease of description, the number that standing-wave ratio is less than corresponding frequency plot combination during xth is designated as a1.
S3, judges whether standing-wave ratio is in default frequency phase less than the number of corresponding frequency plot combination during xth
The individual number interval [nmin, nmax] of bit combination.Wherein, the individual number interval [nmin, nmax] of default frequency plot combination can root
Demarcated according to practical situation.
S4, if the number that standing-wave ratio is less than corresponding frequency plot combination during xth is not in [nmin, nmax], then
By adjust xth so that when standing-wave ratio is less than the xth after adjusting the number of corresponding frequency plot combination be in [nmin,
nmax].
According to one embodiment of present invention, the number of the frequency plot corresponding when standing-wave ratio is less than xth combination is big
When nmax, xth is carried out reduce regulation with default step-length xstep, be less than up to standing-wave ratio corresponding during the xth after adjusting
The number of frequency plot combination is in [nmin, nmax]；The number of corresponding frequency plot combination when standing-wave ratio is less than xth
During less than nmin, xth is carried out increase regulation with default step-length xstep, be less than up to standing-wave ratio corresponding during the xth after adjusting
Frequency plot combination number be in [nmin, nmax].Wherein, default step-length xstep can be set according to practical situation,
Keep little step-length as far as possible.
Specifically, as a1 ＞ nmax, xth is carried out reduce regulation with default step-length xstep, then, again constantly
Adjust frequency and the phase place of microwave source, calculate the corresponding standing-wave ratio heating interior simultaneously, and judge whether this standing-wave ratio is less than
Xth after regulation, if it is less, enumerator adds 1.After the completion of the frequency to microwave source and phase adjusted, it is possible to obtain institute
The indoor standing-wave ratio of heating is had to be less than corresponding frequency plot combination during the xth after adjusting and number, if this number is still
So it is not in [nmin, nmax], then xth is carried out reduce regulation with default step-length xstep again, circulate successively, until standing-wave ratio
The number being less than corresponding frequency plot combination during the xth after adjusting is in [nmin, nmax].
As a1 ＜ nmin, adjust process to similar during a1 ＞ nmax, I will not elaborate.
Further, according to one embodiment of present invention, when xth being carried out increase with regulation with default step-length xstep,
Whether the xth after also judging to adjust is more than default coupling fault standing-wave ratio threshold value xth0, if it is, send coupling fault carrying
Show, and control semiconductor microwave oven to quit work.
Specifically, because standing-wave ratio is bigger, reflection power is higher, and coupling can be deteriorated, i.e. impedance mismatch, can lead to work
Make efficiency to reduce, therefore, when xth after adjustment is more than default coupling fault standing-wave ratio threshold value xth0, send coupling fault
Prompting, and control semiconductor microwave oven to quit work.
S5, is less than corresponding frequency plot combination during the xth after adjusting and semiconductor microwave oven is carried out according to standing-wave ratio
Computer heating control.
According to one embodiment of present invention, at the number of the frequency plot corresponding when standing-wave ratio is less than xth combination
When [nmin, nmax], directly corresponding frequency plot combination during xth is less than according to standing-wave ratio and semiconductor microwave oven is carried out
Computer heating control.
Specifically, each frequency, the group of phase place are combined in heating chamber and will form corresponding field distribution, if heating
Room is divided into some regions, and the electromagnetic field intensity in each region is inconsistent, wherein, the strong place of field intensity, the temperature of hot food to be added
Rise faster, and the weaker place of field intensity, the temperature rise of hot food to be added is slower.When the phase and frequency of microwave source changes,
The field intensity of regional also changes therewith, that is, act on the focus on hot food to be added (the strong point of field intensity) and also can change therewith,
Thus realizing the uniform heating of hot food to be added.
Therefore, in order that different food can uniformly heat, control half by the way of the combination of different frequency and phase place
Conductor microwave oven is heated, and meanwhile, in order to improve the efficiency of heating surface, obtains and warm-served food to be added also by standing-wave ratio adaptive mode
Optimal frequency and phase combination that thing matches, and control semiconductor microwave oven to carry out adding according to this optimal frequency and phase combination
Heat.It is achieved thereby that the uniform heating to different foods, improve work efficiency and the Consumer's Experience of semiconductor microwave oven, and
Effectively reduce the construction cycle of semiconductor microwave oven.
According to one embodiment of present invention, when computer heating control is carried out to semiconductor microwave oven, also by removal standing wave
Than more than or equal to corresponding frequency plot during xth after adjusting with update standing-wave ratio be less than corresponding during the xth after adjusting
Frequency plot combines.When heating to the type food again, this food corresponding frequency plot group can be directly invoked
Close.
For making those skilled in the art more clearly understand the present invention, Fig. 2 is according to an embodiment of the invention partly to lead
The flow chart of the method for heating and controlling of body microwave oven.
As shown in Fig. 2 the method for heating and controlling of semiconductor microwave oven can comprise the following steps that
S101, the initial minimum standing wave obtaining the heating interior of semiconductor microwave oven compares xth.
S102, is controlled semiconductor microwave oven to be heated with small-power, is scanned simultaneously and analyzes, and by changing frequency
Rate and phase place, obtain standing-wave ratio and are less than corresponding frequency plot combination during xth, and obtain the number of combinations of frequency plot.
S103, judges that standing-wave ratio is less than whether xth corresponding frequency plot number of combinations is more than nmax.If it is, execution
Step s104；If not, execution step s105.
S104, carries out to xth reducing regulation, i.e. xth '=xth-xstep with default step-length xstep.
S105, judges that standing-wave ratio is less than whether xth corresponding frequency plot number of combinations is less than nmin.If it is, execution
Step s106；If not, execution step s109.
S106, carries out to xth increasing regulation, i.e. xth '=xth+xstep with default step-length xstep.
S107, judges whether xth ' ＞ xth0 sets up.If it is, execution step s108；If not, return to step s102.
S108, sends alarm, points out heating chamber coupling fault.
S109, is less than corresponding frequency plot combination during xth ' according to standing-wave ratio, and hot food to be added corresponding plus
Thermal power, carries out computer heating control, and updates corresponding frequency phase during the xth after standing-wave ratio is less than regulation to semiconductor microwave oven
Bit combination.
S110, judges whether cooking time reaches Preset Time.If it is, execution step s111；If not, return to step
s109.
S111, controls semiconductor microwave oven to quit work.
In sum, the method for heating and controlling of semiconductor microwave oven according to embodiments of the present invention, obtains quasiconductor first
The indoor initial minimum standing wave of the heating of microwave oven than xth, then, by adjust in semiconductor microwave oven the frequency of microwave source and
Phase place, is less than corresponding frequency plot combination during xth to obtain the indoor standing-wave ratio of heating, and obtains standing-wave ratio less than xth
When corresponding frequency plot combination number.Judge that the number that standing-wave ratio is less than corresponding frequency plot combination during xth is
The no individual number interval [nmin, nmax] being in the combination of default frequency plot, if it is not, then by regulation xth so that standing-wave ratio
The number being less than corresponding frequency plot combination during the xth after adjusting is in [nmin, nmax], finally, little according to standing-wave ratio
Corresponding frequency plot combination during xth after adjusting carries out computer heating control to semiconductor microwave oven.Thus realizing to difference
The uniform heating of food, improves work efficiency and the Consumer's Experience of semiconductor microwave oven, effectively reduces microwave oven simultaneously
Construction cycle.
Fig. 3 is the block diagram of the heating control apparatus of semiconductor microwave oven according to embodiments of the present invention.As Fig. 3 institute
Show, the heating control apparatus of this semiconductor microwave oven include: acquisition module 100, judge module 200, adjustment module 300 and heating
Control module 400.
Wherein, acquisition module 100 is used for obtaining the initial minimum standing wave of the heating interior of semiconductor microwave oven than xth, and
By adjust the frequency of microwave source and phase place in semiconductor microwave oven obtain the indoor standing-wave ratio of heating be less than corresponding during xth
Frequency plot combination, and obtain the number that standing-wave ratio is less than corresponding frequency plot combination during xth.Judge module 200
Whether it is in default frequency plot combination for judging that standing-wave ratio is less than the number of corresponding during xth frequency plot combination
Individual number interval [nmin, nmax].Adjustment module 300 is used for the individual of the frequency plot combination corresponding when standing-wave ratio is less than xth
Number is not in when [nmin, nmax] passing through to adjust xth so that corresponding frequency plot group when standing-wave ratio is less than the xth after regulation
The number closed is in [nmin, nmax].Heating control module 400 is used for being less than according to standing-wave ratio corresponding during the xth after adjusting
Frequency plot combination computer heating control is carried out to semiconductor microwave oven.
According to one embodiment of present invention, at the number of the frequency plot corresponding when standing-wave ratio is less than xth combination
When [nmin, nmmax], it is right that heating control module 400 is directly less than corresponding frequency plot combination during xth according to standing-wave ratio
Semiconductor microwave oven carries out computer heating control.
Specifically, each frequency, the group of phase place are combined in heating chamber and will form corresponding field distribution, if heating
Room is divided into some regions, and the electromagnetic field intensity in each region is inconsistent, wherein, the strong place of field intensity, the temperature of hot food to be added
Rise faster, and the weaker place of field intensity, the temperature rise of hot food to be added is slower.When the phase and frequency of microwave source changes,
The field intensity of regional also changes therewith, that is, act on the focus on hot food to be added (the strong point of field intensity) and also can change therewith,
Thus realizing the uniform heating of hot food to be added.
Therefore, in order that different food can uniformly heat, control half by the way of the combination of different frequency and phase place
Conductor microwave oven is heated, and meanwhile, in order to improve the efficiency of heating surface, obtains and warm-served food to be added also by standing-wave ratio adaptive mode
Optimal frequency and phase combination that thing matches, and control semiconductor microwave oven to carry out adding according to this optimal frequency and phase combination
Heat.It is achieved thereby that the uniform heating to different foods, improve work efficiency and the Consumer's Experience of semiconductor microwave oven, and
Effectively reduce the construction cycle of semiconductor microwave oven.
According to one embodiment of present invention, microwave source can be multiple, and the operating frequency of each microwave source keeps
Identical.
Specifically, when microwave source has multiple, multiple microwave feedbacks can be arranged on the wall of the heating chamber of microwave oven
Entrance, the number of microwave feed-in mouth is identical with the number of microwave source, and ensures have between each microwave feed-in mouth preferably
Isolation (typically under conditions of ensureing preferable isolation, isolation is less than -15db as far as possible), in addition, in order to ensure each
The operating frequency of microwave source keeps identical, can produce microwave by a microwave signal generation module.
According to one embodiment of present invention, the frequency of microwave source can between 2.4ghz to 2.5ghz continuously adjustabe,
The phase place of microwave source can between -180 ° to+180 ° continuously adjustabe, specifically can be set according to practical situation.
Specifically, after semiconductor microwave oven works on power, semiconductor microwave oven can be first controlled to run, for example, can
With control each microwave source output as 10w or 20w.Then the electromagnetic wave indoor to heating is scanned and analyzes,
During this, the frequency of acquisition module 100 constantly regulate microwave source and phase place, for example, the frequency of microwave source can be in 2.4ghz
The consecutive variations to 2.5ghz, the phase place of microwave source can between -180 ° to+180 ° consecutive variations.Meanwhile, acquisition module
100 calculate the corresponding standing-wave ratio heating interior, and judge whether this standing-wave ratio is less than xth by judge module 200, if little
In then enumerator adds 1.After the completion of the frequency to microwave source and phase adjusted, it is possible to obtain the indoor standing-wave ratio of all heating
Less than corresponding frequency plot combination during xth and number.For the ease of description, standing-wave ratio is less than corresponding during xth
The number of frequency plot combination is designated as a1.
According to one embodiment of present invention, the number of the frequency plot corresponding when standing-wave ratio is less than xth combination is big
When nmax, adjustment module 300 carries out to xth reducing regulation with default step-length, until standing-wave ratio is less than the xth when institute after adjusting
The number of corresponding frequency plot combination is in [nmin, nmmax]；The corresponding frequency plot group when standing-wave ratio is less than xth
When the number closed is less than nmin, adjustment module 300 carries out to xth increasing regulation with default step-length, until standing-wave ratio is less than adjusting
During rear xth, the number of corresponding frequency plot combination is in [nmin, nmmax].
Specifically, as a1 ＞ nmax, adjustment module 300 carries out to xth reducing regulation with default step-length xstep, so
Afterwards, acquisition module 100 frequency of constantly regulate microwave source and phase place again, calculates the corresponding standing-wave ratio heating interior simultaneously,
And whether this standing-wave ratio is judged less than the xth after adjusting by judge module 200, if it is less, enumerator adds 1.When to micro-
After the completion of the frequency of wave source and phase adjusted, acquisition module 100 can obtain after the indoor standing-wave ratios of all heating are less than and adjust
Xth when corresponding frequency plot combination and number, if this number is still not in [nmin, nmax], adjustment module
300 then carry out to xth reducing regulation with default step-length xstep again, circulate successively, until when standing-wave ratio is less than the xth after adjusting
The number of corresponding frequency plot combination is in [nmin, nmax].
As a1 ＜ nmin, adjust process to similar during a1 ＞ nmax, I will not elaborate.
Further, according to one embodiment of present invention, judge module 200 adjustment module 300 with preset step-length pair
Xth carries out whether increasing the xth after judging when adjusting to adjust more than default coupling fault standing-wave ratio threshold value, if after adjusting
Xth is more than default coupling fault standing-wave ratio threshold value, and heating control module 400 then controls semiconductor microwave oven to send coupling fault
Prompting, and control semiconductor microwave oven to quit work.
Specifically, because standing-wave ratio is bigger, reflection power is higher, and coupling can be deteriorated, i.e. impedance mismatch, can lead to work
Make efficiency to reduce, therefore, xth after judging to adjust for the judge module 200 is more than default coupling fault standing-wave ratio threshold value xth0
When, heating control module 400 controls semiconductor microwave oven to send coupling fault cues, and controls semiconductor microwave oven to stop work
Make.
According to one embodiment of present invention, heating control module 400 is additionally operable to semiconductor microwave oven is being heated
It is more than or equal to corresponding frequency plot during the xth after adjusting during control by removal standing-wave ratio and update standing-wave ratio less than regulation
Corresponding frequency plot combination during rear xth.When heating to the type food again, this food can be directly invoked
Corresponding frequency plot combination.
The heating control apparatus of semiconductor microwave oven according to embodiments of the present invention, obtain semiconductor microactuator by acquisition module
The initial minimum standing wave of the heating interior of ripple stove is than xth, and the frequency by microwave source in regulation semiconductor microwave oven and phase place
It is less than corresponding frequency plot combination during xth to obtain the indoor standing-wave ratio of heating, and obtains standing-wave ratio and be less than xth when institute
The number of corresponding frequency plot combination.Judge module judges that standing-wave ratio is less than the individual of corresponding frequency plot combination during xth
Whether number is in the individual number interval [nmin, nmax] of default frequency plot combination, if it is not, then being adjusted by adjustment module
Xth so that the number that standing-wave ratio is less than corresponding frequency plot combination during the xth after adjusting is in [nmin, nmax], then,
Heating control module is less than corresponding frequency plot combination during the xth after adjusting according to standing-wave ratio and semiconductor microwave oven is carried out
Computer heating control.Thus realizing the uniform heating to different foods, improve work efficiency and the Consumer's Experience of semiconductor microwave oven,
Effectively reduce the construction cycle of microwave oven simultaneously.
Additionally, embodiments of the invention also proposed a kind of semiconductor microwave oven, it includes above-mentioned semiconductor microwave oven
Heating control apparatus.
Semiconductor microwave oven according to embodiments of the present invention, by above-mentioned heating control apparatus, can be by adjusting half
In conductor microwave oven, the frequency of microwave source and phase place obtain the indoor standing-wave ratio of heating and are less than corresponding frequency plot group during xth
Closing, computer heating control is carried out to semiconductor microwave oven, thus realizing the uniform heating to different foods, improve semiconductor microwave oven
Work efficiency and Consumer's Experience, effectively reduce the construction cycle of microwave oven simultaneously.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation of instruction such as pin ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
Connect or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limit unless otherwise clear and definite.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combine.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (15)
1. a kind of method for heating and controlling of semiconductor microwave oven is it is characterised in that comprise the following steps:
The initial minimum standing wave obtaining the heating interior of described semiconductor microwave oven compares xth；
By adjusting the frequency of microwave source and phase place in described semiconductor microwave oven, to obtain the indoor standing-wave ratio of described heating little
Corresponding frequency plot combination when xth, and it is individual less than corresponding frequency plot combination during xth to obtain described standing-wave ratio
Number；
Judge whether described standing-wave ratio is in default frequency plot group less than the number of corresponding frequency plot combination during xth
The individual number interval [nmin, nmax] closing；
If the number that described standing-wave ratio is less than corresponding frequency plot combination during xth is not in [nmin, nmax], then pass through
Adjust xth so that described standing-wave ratio be less than corresponding frequency plot combination during the xth after adjusting number be in [nmin,
nmax]；
It is less than corresponding frequency plot combination during the xth after adjusting according to described standing-wave ratio described semiconductor microwave oven is carried out
Computer heating control.
2. semiconductor microwave oven as claimed in claim 1 method for heating and controlling it is characterised in that by adjust xth so that
The number that described standing-wave ratio is less than corresponding frequency plot combination during the xth after adjusting is in [nmin, nmax], comprising:
When described standing-wave ratio is less than xth, the number of corresponding frequency plot combination is more than nmax, with default step-length to xth
Carry out reducing and adjust, until the number that described standing-wave ratio is less than corresponding frequency plot combination during the xth after adjusting is in
[nmin, nmax]；
When described standing-wave ratio is less than xth, the number of corresponding frequency plot combination is less than nmin, with described default step-length
Xth is carried out increase and adjust, until described standing-wave ratio is less than at the corresponding number of frequency plot combination during the xth after adjusting
In [nmin, nmax].
3. the method for heating and controlling of semiconductor microwave oven as claimed in claim 2 is it is characterised in that with described default step-length pair
When xth carries out increasing regulation, whether the xth after also judging to adjust mates fault standing-wave ratio threshold value more than default, wherein,
If the xth after adjusting is more than default coupling fault standing-wave ratio threshold value, send coupling fault cues, and control described
Semiconductor microwave oven quits work.
4. the method for heating and controlling of semiconductor microwave oven as claimed in claim 1 is it is characterised in that when described standing-wave ratio is less than
When the number of corresponding frequency plot combination during xth is in [nmin, nmax], when directly xth being less than according to described standing-wave ratio
Corresponding frequency plot combination carries out computer heating control to described semiconductor microwave oven.
5. the method for heating and controlling of the semiconductor microwave oven as any one of claim 1-4 is it is characterised in that to institute
When stating semiconductor microwave oven and carrying out computer heating control, also by remove described standing-wave ratio be more than or equal to corresponding during the xth after adjusting
Frequency plot be less than corresponding frequency plot combination during the xth after adjusting to update described standing-wave ratio.
6. the method for heating and controlling of the semiconductor microwave oven as any one of claim 1-5 is it is characterised in that described micro-
The frequency of wave source continuously adjustabe between 2.4ghz to 2.5ghz, the phase place of described microwave source is continuous between -180 ° to+180 °
Adjustable.
7. the method for heating and controlling of semiconductor microwave oven as claimed in claim 1 is it is characterised in that described microwave source is many
Individual, the operating frequency of each described microwave source keeps identical.
8. a kind of heating control apparatus of semiconductor microwave oven are it is characterised in that include:
Acquisition module, the indoor initial minimum standing wave of the heating for obtaining described semiconductor microwave oven is than xth, and passes through to adjust
In described semiconductor microwave oven, the frequency of microwave source and phase place are corresponding less than during xth to obtain the indoor standing-wave ratio of described heating
Frequency plot combination, and obtain the number that described standing-wave ratio is less than corresponding frequency plot combination during xth；
Judge module, pre- for judging whether described standing-wave ratio is in less than the number of corresponding frequency plot combination during xth
If frequency plot combination individual number interval [nmin, nmax]；
Adjustment module, the number for frequency plot combination corresponding when described standing-wave ratio is less than xth be not in [nmin,
Nmax] when by adjusting xth so that at the number of corresponding frequency plot combination when described standing-wave ratio is less than the xth after adjusting
In [nmin, nmax]；
Heating control module, the frequency plot for being less than corresponding during the xth after adjusting according to described standing-wave ratio combines to institute
State semiconductor microwave oven and carry out computer heating control.
9. the heating control apparatus of semiconductor microwave oven as claimed in claim 8 are it is characterised in that wherein,
When described standing-wave ratio is less than xth, the number of corresponding frequency plot combination is more than nmax, described adjustment module with
Default step-length carries out to xth reducing regulation, until described standing-wave ratio is less than corresponding frequency plot combination during the xth after adjusting
Number be in [nmin, nmax]；
When described standing-wave ratio is less than xth, the number of corresponding frequency plot combination is less than nmin, described adjustment module with
Described default step-length carries out to xth increasing regulation, until described standing-wave ratio is less than corresponding frequency plot during the xth after adjusting
The number of combination is in [nmin, nmax].
10. semiconductor microwave oven as claimed in claim 9 heating control apparatus it is characterised in that described judge module also
For whether the xth after judging when described adjustment module is carried out to xth with described default step-length and increases and adjust to adjust is more than pre-
If coupling fault standing-wave ratio threshold value, wherein,
If the xth after adjusting is more than default coupling fault standing-wave ratio threshold value, described heating control module then controls described half
Conductor microwave oven sends coupling fault cues, and controls described semiconductor microwave oven to quit work.
The heating control apparatus of 11. semiconductor microwave ovens as claimed in claim 8 are it is characterised in that when described standing-wave ratio is little
When the number of corresponding frequency plot combination when xth is in [nmin, nmax], described heating control module is directly according to institute
State standing-wave ratio and be less than corresponding frequency plot during xth and combine and computer heating control is carried out to described semiconductor microwave oven.
The heating control apparatus of 12. semiconductor microwave ovens as claimed in claim 8 are it is characterised in that described computer heating control mould
Block is additionally operable to, when carrying out computer heating control to described semiconductor microwave oven after the described standing-wave ratio of removal is more than or equal to and adjusts
During xth, corresponding frequency plot is less than corresponding frequency plot combination during the xth after adjusting to update described standing-wave ratio.
The heating control apparatus of 13. semiconductor microwave ovens as any one of claim 8-12 are it is characterised in that described
The frequency of microwave source continuously adjustabe between 2.4ghz to 2.5ghz, the phase place of described microwave source connects between -180 ° to+180 °
Continuous adjustable.
The heating control apparatus of 14. semiconductor microwave ovens as claimed in claim 8 are it is characterised in that described microwave source is many
Individual, the operating frequency of each described microwave source keeps identical.
A kind of 15. semiconductor microwave ovens are it is characterised in that include the semiconductor microwave as any one of claim 8-14
The heating control apparatus of stove.
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| US4336434A (en) * | 1980-08-15 | 1982-06-22 | General Electric Company | Microwave oven cavity excitation system employing circularly polarized beam steering for uniformity of energy distribution and improved impedance matching |
| US4446349A (en) * | 1983-01-03 | 1984-05-01 | General Electric Company | Microwave phase shifting device |
| CN102510595A (en) * | 2011-11-04 | 2012-06-20 | 广东美的微波电器制造有限公司 | Control method of semiconductor microwave oven |
| CN103533690A (en) * | 2012-07-05 | 2014-01-22 | Nxp股份有限公司 | Microwave power source and method for automatic adjustment of work frequency |
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| CN106369644B (en) | 2018-11-23 |
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