CN106211408A - The control method of microwave oven and microwave oven - Google Patents
The control method of microwave oven and microwave oven Download PDFInfo
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- CN106211408A CN106211408A CN201610514943.5A CN201610514943A CN106211408A CN 106211408 A CN106211408 A CN 106211408A CN 201610514943 A CN201610514943 A CN 201610514943A CN 106211408 A CN106211408 A CN 106211408A
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- microwave oven
- resonant frequency
- resistance
- detection module
- light condition
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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
- H05B6/687—Circuits for monitoring or control for cooking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
The invention discloses the control method of a kind of microwave oven, be used for detecting whether microwave oven is in Light Condition, the control method of microwave oven includes: detecting step, and detecting step detection is in the current resonant frequency of the primary side setting time period inner high voltage transformator；Judge step, it is judged that the more current resonant frequency of step and setting resonant frequency are to judge whether microwave oven is in Light Condition, if current resonant frequency exceeds the set point setting resonant frequency, it is judged that microwave oven is in Light Condition；Rate-determining steps, rate-determining steps stops the power output of microwave oven or reduces the operation power of microwave oven when microwave oven is in Light Condition.The control method of the microwave oven of embodiment of the present invention is by detecting the change of resonant frequency, can judge whether microwave oven is in Light Condition quickly and accurately, carry out corresponding power control, thus avoid magnetron too fast aging or damage, and it realizes simple, cost is relatively low.The invention also discloses a kind of microwave oven.
Description
Technical field
The present invention relates to household electrical appliance technical field, particularly to the controlling party of the microwave oven of a kind of microwave oven Light Condition
Method and a kind of microwave oven.
Background technology
Along with the fast development of power electronic devices, the continuous maturation of converter technique, converter technique is applied to microwave oven.
Frequency-conversion microwave oven has the advantages that fuselage is light, noise is low, power-saving.As other home appliances, frequency-conversion microwave oven has negative
Load state and Light Condition, when frequency-conversion microwave oven is operated in Light Condition with rated power for a long time, easily cause magnetron
Too fast aging or damage, even bring a series of potential safety hazard.
At present, zero load or the abnormal condition of frequency-conversion microwave oven is typically judged by detection anode current method.It is
Quickly raising based on magnetron magnetic field temperature when zero load, the threshold voltage of magnetron oscillations reduces, and anode current quickly becomes big
Principle, judge according to the slope variation of anode current.But, this method needs to increase current sampling devices and electricity
Road, there is also the highest potential difference, needs to be adequately isolated, and causes the problems such as cost increase and converter size increase.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, the present invention needs to provide one
Plant the control method of the microwave oven of microwave oven Light Condition and a kind of microwave oven.
The control method of the microwave oven of embodiment of the present invention, is used for detecting whether microwave oven is in Light Condition, described
The control method of microwave oven comprises the following steps:
Detecting step, the detection of described detecting step is at the current resonance frequency of the primary side setting time period inner high voltage transformator
Rate；
Judge that step, the more described current resonant frequency of described judgement step and setting resonant frequency are to judge described microwave
Whether stove is in Light Condition, if described current resonant frequency exceeds the set point of described setting resonant frequency, it is judged that described
Microwave oven is in Light Condition；And
Rate-determining steps, the power that described rate-determining steps stops described microwave oven when described microwave oven is in Light Condition is defeated
Go out or reduce the operation power of described microwave oven.
The control method of the microwave oven of embodiment of the present invention is by the resonant frequency of detection high-tension transformer primary side
Change, it is possible to judge whether described microwave oven is in Light Condition quickly and accurately, carry out corresponding power control, thus avoid
Magnetron is too fast aging or damages, and it realizes simple, and cost is relatively low.
In some embodiments, described detecting step specifically includes:
Detect the driving pulsewidth of the primary side of described high-tension transformer within the described setting time period；
Described current resonant frequency is obtained according to described driving pulsewidth.
In some embodiments, described detecting step specifically includes:
Detect the harmonic period of the primary side of described high-tension transformer within the described setting time period；
Described current resonant frequency is obtained according to described harmonic period.
In some embodiments, described detecting step specifically includes:
Detect the primary side of described high-tension transformer resonance times within the setting time within the described setting time period；
Described current resonant frequency is obtained according to described resonance times.
In some embodiments, described the time period is set as the civil power cycle.
In some embodiments, described rate-determining steps also includes:
When described microwave oven is in Light Condition and stops the power output of described microwave oven, control described microwave oven and show
Show error code.
The microwave oven of embodiment of the present invention, including:
Detection module, described detection module for detection at primary side the most humorous setting time period inner high voltage transformator
Vibration frequency；
Judge module, described judge module is described to judge for relatively described current resonant frequency and setting resonant frequency
Whether microwave oven is in Light Condition, if described current resonant frequency exceeds the set point of described setting resonant frequency, it is judged that
Described microwave oven is in Light Condition；And
Control module, the power that described control module stops described microwave oven when described microwave oven is in Light Condition is defeated
Go out or reduce the operation power of described microwave oven.
In some embodiments, described detection module includes:
First resistance, one end of described first resistance and one end of resonant capacitance connect,
Second resistance, one end of described second resistance is connected with the other end of described first resistance, described second resistance
Other end ground connection, wherein, has primary nodal point between described first resistance and described second resistance；
3rd resistance, one end of described 3rd resistance and the other end of described resonant capacitance connect, and
4th resistance, one end of described 4th resistance is connected with the other end of described 3rd resistance, described 4th resistance
Other end ground connection, wherein, has secondary nodal point between described 3rd resistance and described 4th resistance.
In some embodiments, described detection module includes:
Driving pulse width detection module, described driving pulse width detection module is for detection described height within the described setting time period
The driving pulsewidth of the primary side of pressure transformer,
Described detection module is for obtaining described current resonant frequency according to described driving pulsewidth.
In some embodiments, described detection module includes:
Harmonic period detection module, described harmonic period detection module is for detection described height within the described setting time period
The harmonic period of the primary side of pressure transformer；
Described detection module is for obtaining described current resonant frequency according to described harmonic period.
In some embodiments, described detection module includes:
Resonance times detection module, described resonance times detection module is for detection described height within the described setting time period
The resonance times of the primary side of pressure transformer；
Described detection module is for obtaining described current resonant frequency according to described resonance times.
In some embodiments, described microwave oven includes display module, and described control module is at described microwave oven
When being in Light Condition and stop the power output of described microwave oven, control described display module display error code.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage can be from combining the accompanying drawings below description to embodiment
Will be apparent from easy to understand, wherein:
Fig. 1 is the schematic flow sheet of the control method of the microwave oven of embodiment of the present invention.
Fig. 2 is the high-level schematic functional block diagram of the microwave oven of embodiment of the present invention.
Fig. 3 is the circuit diagram of the microwave oven of embodiment of the present invention.
Fig. 4 is another high-level schematic functional block diagram of the microwave oven of embodiment of the present invention.
Fig. 5 is another schematic flow sheet of the control method of the microwave oven of embodiment of the present invention.
Fig. 6 is the another schematic flow sheet of the control method of the microwave oven of embodiment of the present invention.
Fig. 7 is another schematic flow sheet of the control method of the microwave oven of embodiment of the present invention.
Fig. 8 is another again schematic flow sheet of the control method of the microwave oven of embodiment of the present invention.
Main element symbol description:
Microwave oven 10, detection module 12, driving pulse width detection module 122, harmonic period detection module 124, resonance times
Detection module 126, processor 128, comparator 130, enumerator 132, timer 134, judge module 14, control module 16, aobvious
Show module the 17, first resistance R3, the second resistance R4, the 3rd resistance R5, the 4th resistance R6.
Detailed description of the invention
Embodiments of the present invention are described below in detail, and the example of embodiment is shown in the drawings, wherein, and identical or class
As label represent same or similar element from start to finish or there is the element of same or like function.
The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and is not understood that
For limitation of the present invention.
Refer to Fig. 1, the control method of the microwave oven of embodiment of the present invention, it is used for detecting whether microwave oven 10 is in sky
Load state, the control method of microwave oven comprises the following steps:
Detecting step S01, detecting step S01 detection is at primary side the most humorous setting time period inner high voltage transformator T1
Vibration frequency；
Judge step S02, it is judged that the more current resonant frequency of step S02 and setting resonant frequency are to judge that microwave oven 10 is
No it is in Light Condition, if current resonant frequency exceeds the set point setting resonant frequency, it is judged that microwave oven 10 is in zero load
State；And
Rate-determining steps S03, rate-determining steps S03 stop the power output of microwave oven 10 when microwave oven 10 is in Light Condition
Or reduce the operation power of microwave oven 10.
Referring to Fig. 2, the microwave oven 10 of embodiment of the present invention includes detection module 12, judge module 14 and control module
16。
The control method of the microwave oven of embodiment of the present invention can be realized by the microwave oven 10 of embodiment of the present invention, example
As detecting step S01 can be realized by detection module 12, it is judged that step S02 can be realized by judge module 14, rate-determining steps S03 can be by
Control module 16 realizes.
In other words, detection module 12 may be used for detecting working as in the primary side setting time period inner high voltage transformator T1
Front resonant frequency.Judge module 14 may be used for the current resonant frequency of comparison and sets resonant frequency to judge microwave oven 10 whether
It is in Light Condition, if current resonant frequency exceeds the set point setting resonant frequency, it is judged that microwave oven 10 is in unloaded shape
State.Control module 16 may be used for stopping the power output of microwave oven 10 when microwave oven 10 is in Light Condition or reducing microwave
The operation power of stove 10.
So, by the change of the resonant frequency of detection high-tension transformer T1 primary side, it is possible to judge micro-quickly and accurately
Whether ripple stove 10 is in Light Condition, carries out corresponding power control, thus avoids magnetron MGT too fast aging or damage, and
It realizes simple, and cost is relatively low.
Referring to Fig. 3, the detection module of embodiment of the present invention includes the first resistance R3, the second resistance R4, the 3rd resistance
R5 and the 4th resistance R6.Wherein, one end of one end of the first resistance R3 and resonant capacitance C2 connects, one end of the second resistance R4 with
The other end of the first resistance R3 is connected, and the other end ground connection of the second resistance R4 has between the first resistance R3 and the second resistance R4
One end of primary nodal point J1, the 3rd resistance R5 and the other end of resonant capacitance C2 connect, one end of the 4th resistance R6 and the 3rd electricity
The other end of resistance R5 is connected, the other end ground connection of the 4th resistance R6, wherein, has the between the 3rd resistance R5 and the 4th resistance R6
Two node J2.Detection module 12 is for detecting current resonant frequency by primary nodal point J1 and secondary nodal point J2.
Specifically, referring to Fig. 4, detection module 12 includes processor 128 and comparator 130.Processor 128 is used for reading
Current resonant frequency.Comparator 130 is for comparing the size of the voltage U2 of the voltage U1 and secondary nodal point J2 of primary nodal point J1.When
During U1 >=U2, referred to as synchronize, i.e. show to occur once to vibrate in harmonic period.Detection module 12 also includes enumerator 132.
The 3rd node J3 resonant frequency waveform between resonant capacitance C2 and the 3rd resistance R5 rises to peak from minimum point, then from
Peak drops to less than the process of U1, referred to as one synchronizing cycle, and enumerator 132 occurs synchronization in setting the time period
Number of times counts, and obtains current resonant frequency.Resonant capacitance C2 is the resonant capacitance C2 of transformator T1 primary side.
Then, processor 128 reads current resonant frequency value.Processor 128 reads current resonant frequency and i.e. reads the 3rd
The current resonant frequency of node J3.
In the unloaded state, the magnetic field temperature of magnetron MGT raises, and the vibration threshold voltage of magnetron MGT reduces.And it is high
Pressure transformer T1 has fixing voltage rising scale, so the primary side voltage of high-tension transformer T1 the most also reduces；Due to
The demand voltage of high-tension transformer T1 primary side declines, and the driving time of switching tube Q1 shortens, the single harmonic period of primary side
Shorten, i.e. uprise in the resonant frequency setting the time period (as within the unit civil power cycle, the unit civil power cycle can be 20ms).Therefore
The sky of microwave oven 10 can be judged in the current resonant frequency of primary side setting time period inner high voltage transformator T1 by detection
Load state.
Referring to Fig. 5, in some embodiments, detecting step S01 specifically includes:
Step S0101, detects the driving pulsewidth in the primary side setting time period inner high voltage transformator T1；
Step S0102, obtains current resonant frequency according to driving pulsewidth.
In some embodiments, detection module 12 specifically includes driving pulse width detection module 122.Step S0101 can be by
Driving pulse width detection module 122 to realize, step S0102 can be realized by detection module 12.
In other words, pulse width detection module 122 is driven to may be used for detecting setting time period inner high voltage transformator T1's
The driving pulsewidth of primary side, then detection module 12 is for according to driving pulsewidth to obtain current resonant frequency.
Specifically, detection module 12 includes timer 134.Timer 134 can be to the time that a synchronizing cycle occurs
Carry out timing, thus obtain driving the value of pulsewidth, through calculating, draw current resonant frequency.
Referring to Fig. 6, in some embodiments, detecting step S01 specifically includes:
Step S0103, detects the harmonic period in the primary side setting time period inner high voltage transformator T1；
Step S0104, obtains current resonant frequency according to harmonic period.
In some embodiments, detection module 12 specifically includes harmonic period detection module 124.Step S0103 can be by
Harmonic period detection module 124 realizes, and step S0104 can be realized by detection module 12.
In other words, harmonic period detection module 124 may be used for detecting setting time period inner high voltage transformator T1's
The harmonic period of primary side, it is then detected that module 12 is for obtaining current resonant frequency according to harmonic period.
Same, during detection harmonic period, by timer 134, the time that a synchronizing cycle occurs can be counted
Time, determine harmonic period, thus obtain current resonant frequency.
Referring to Fig. 7, in some embodiments, detecting step S01 specifically includes:
Step S0105, detects the resonance times in the primary side setting time period inner high voltage transformator T1；
Step S0106, obtains current resonant frequency according to resonance times.
In some embodiments, detection module 12 specifically includes resonance times detection module 126.Step S0105 can be by
Resonance times detection module 126 realizes, and step S0106 can be realized by detection module 12.
In other words, resonance times detection module 126 may be used for detecting setting time period inner high voltage transformator T1's
The resonance times of primary side, it is then detected that module 12 is for obtaining current resonant frequency according to resonance times.
During detection resonance times, by enumerator 132, the resonance times set in the time period can be counted, thus
Obtain current resonant frequency.
In the design and production process of microwave oven, need to be obtained by theory analysis and actual experiment set resonant frequency and
Set point, and can be pre-stored in the judge module 14 of microwave oven 10.Set point can be understood as judging microwave oven 10
The range of error allowed time the most unloaded.
After detection module 12 detects current resonant frequency, this current resonant frequency can be sent to judge module 14.
Judge module 14 relatively current resonant frequency and setting resonant frequency are to judge whether microwave oven 10 is in Light Condition, if currently
Resonant frequency exceeds the set point setting resonant frequency, it is judged that microwave oven 10 is in Light Condition.
When microwave oven 10 is in Light Condition, control module 16 stops microwave by changing the driving signal of microwave oven 10
The power output of stove 10 or the operation power of reduction microwave oven.
Referring to Fig. 8, in some embodiments, rate-determining steps S03 also includes:
Step S0301, when microwave oven 10 is in Light Condition and stops the power output of microwave oven 10, controls microwave oven
10 display error codes.
In some embodiments, microwave oven 10 includes display module 17, and step S0301 can be controlled to show by control module 16
Show that module 17 realizes.
In other words, control module 16 may be used for being in Light Condition at microwave oven 10 and stopping the power of microwave oven 10
During output, control display module 17 and show error code.
Microwave oven 10 can include the host computer being connected with control module 16, and display module 17 may be provided at host computer, controls
Module 16 shows error code by controlling display module 17 with host computer communication.
The detection module 12 of embodiment of the present invention, judge module 14 and control module 16 can be integrated into the MCU of microwave oven
In (MicroControlUnit, micro-control unit), MCU is realized to the detection of current resonant frequency with to microwave by each pin
The control of the output of stove 10 and the display of error code.Such as, MCU can show to control microwave oven 10 with host computer communication
Error code.
In some embodiments, the time period is set as the civil power cycle.Specifically, civil power cycle e.g. 20ms, so,
The setting time period is set to the civil power cycle, it is possible to decrease the complexity of microwave oven 10 control design case and make the applicable model of microwave oven 10
Enclose wider.
In the description of embodiments of the present invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length
Degree ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ",
Orientation or the position relationship of the instruction such as " outward ", " clockwise ", " counterclockwise " are based on orientation shown in the drawings or position relationship, only
It is necessary for the ease of describing embodiments of the present invention and simplification description rather than instruction or the device of hint indication or element
There is specific orientation, with specific azimuth configuration and operation, therefore it is not intended that restriction to embodiments of the present invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit
Indicate the quantity of indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or impliedly wrap
Include one or more described features.In the description of embodiments of the present invention, " multiple " are meant that two or two
Above, unless otherwise expressly limited specifically.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" install ", " being connected ", " connection " should be interpreted broadly, and connect for example, it may be fixing, it is also possible to be to removably connect, or one
Body ground connects；Can be mechanically connected, it is also possible to be electrical connection or can mutually communication；Can be to be joined directly together, it is also possible to logical
Cross intermediary to be indirectly connected to, can be connection or the interaction relationship of two elements of two element internals.For ability
For the those of ordinary skill in territory, above-mentioned term specifically containing in embodiments of the present invention can be understood as the case may be
Justice.
In embodiments of the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it
On " " or D score can include that the first and second features directly contact, it is also possible to include that the first and second features are not directly to connect
Touch but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " on
Face " include fisrt feature directly over second feature and oblique upper, or it is special higher than second to be merely representative of fisrt feature level height
Levy.Fisrt feature second feature " under ", " lower section " and " below " include that fisrt feature is directly over second feature and tiltedly on
Side, or it is merely representative of fisrt feature level height less than second feature.
Following disclosure provides many different embodiments or example for realizing embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, hereinafter parts and setting to specific examples are described.When
So, they are the most merely illustrative, and are not intended to limit the present invention.Additionally, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition is for purposes of simplicity and clarity, and itself does not indicate and is begged for
Relation between the various embodiments of opinion and/or setting.Additionally, the various specific technique that embodiments of the present invention provide
With the example of material, but those of ordinary skill in the art are it can be appreciated that the making of the application of other techniques and/or other materials
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implement
Mode ", " example ", the description of " concrete example " or " some examples " etc. mean to combine described embodiment or example describes tool
Body characteristics, structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual,
The schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, knot
Structure, material or feature can combine in any one or more embodiments or example in an appropriate manner.
In flow chart or at this, any process described otherwise above or method description are construed as, and expression includes
One or more is for realizing the module of code, fragment or the portion of the executable instruction of the step of specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not by shown or discuss suitable
Sequence, including according to involved function by basic mode simultaneously or in the opposite order, performs function, and this should be by the present invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or the logic described otherwise above at this and/or step, for example, it is possible to be considered as to use
In the sequencing list of the executable instruction realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system such as computer based system, including processing module or other can be from instruction
Execution system, device or equipment instruction fetch also perform the system of instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be any can comprise, store, communicate, propagate or
Transmission procedure is for instruction execution system, device or equipment or combines these instruction execution systems, device or equipment and uses
Device.The more specifically example (non-exhaustive list) of computer-readable medium includes following: have one or more wiring
Electrical connection section (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read only memory
(ROM), erasable read only memory (EPROM or flash memory), the fiber device edited, and portable optic disk is read-only deposits
Reservoir (CDROM).It addition, computer-readable medium can even is that and can print the paper of described program thereon or other are suitable
Medium, because then can carry out editing, interpreting or if desired with it such as by paper or other media are carried out optical scanning
His suitable method is processed to electronically obtain described program, is then stored in computer storage.
Should be appreciated that each several part of embodiments of the present invention can use hardware, software, firmware or combinations thereof to come in fact
Existing.In the above-described embodiment, multiple steps or method can be with storing in memory and by suitable instruction execution system
The software or the firmware that perform realize.Such as, if realized with hardware, with the most the same, available ability
Any one or their combination in following technology known to territory realize: have for data signal is realized logic function
The discrete logic of logic gates, has the special IC of suitable combination logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that and realize all or part of step that above-described embodiment method is carried
Suddenly the program that can be by completes to instruct relevant hardware, and described program can be stored in a kind of computer-readable storage medium
In matter, this program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in various embodiments of the present invention can be integrated in a processing module, it is possible to
Being that unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated
Module both can realize to use the form of hardware, it would however also be possible to employ the form of software function module realizes.Described integrated module
If realized using the form of software function module and as independent production marketing or when using, it is also possible to be stored in a calculating
In machine read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
Although above it has been shown and described that embodiments of the present invention, it is to be understood that above-mentioned embodiment is
Exemplary, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be right
Above-mentioned enforcement enforcement is changed, revises, replaces and modification.
Claims (12)
1. a control method for microwave oven, is used for detecting whether microwave oven is in Light Condition, it is characterised in that described microwave
The control method of stove comprises the following steps:
Detecting step, the detection of described detecting step is in the current resonant frequency of the primary side setting time period inner high voltage transformator；
Judge that step, the more described current resonant frequency of described judgement step and setting resonant frequency are to judge that described microwave oven is
No it is in Light Condition, if described current resonant frequency exceeds the set point of described setting resonant frequency, it is judged that described microwave
Stove is in Light Condition；And
Rate-determining steps, described rate-determining steps stop when described microwave oven is in Light Condition described microwave oven power output or
Reduce the operation power of described microwave oven.
2. the control method of microwave oven as claimed in claim 1, it is characterised in that described detecting step specifically includes:
Detect the driving pulsewidth of the primary side of described high-tension transformer within the described setting time period；
Described current resonant frequency is obtained according to described driving pulsewidth.
3. the control method of microwave oven as claimed in claim 1, it is characterised in that described detecting step specifically includes:
Detect the harmonic period of the primary side of described high-tension transformer within the described setting time period；
Described current resonant frequency is obtained according to described harmonic period.
4. the control method of microwave oven as claimed in claim 1, it is characterised in that described detecting step specifically includes:
Detect the resonance times of the primary side of described high-tension transformer within the described setting time period；
Described current resonant frequency is obtained according to described resonance times.
5. the control method of the microwave oven as described in any one of claim 1-4, it is characterised in that described set the time period as city
The electricity cycle.
6. the control method of microwave oven as claimed in claim 1, it is characterised in that described rate-determining steps also includes:
When described microwave oven is in Light Condition and stops the power output of described microwave oven, control described microwave oven display mistake
Code by mistake.
7. a microwave oven, it is characterised in that described microwave oven includes:
Detection module, described detection module is for detecting the current resonance frequency in the primary side setting time period inner high voltage transformator
Rate；
Judge module, described judge module is for relatively described current resonant frequency and sets resonant frequency to judge described microwave
Whether stove is in Light Condition, if described current resonant frequency exceeds the set point of described setting resonant frequency, it is judged that described
Microwave oven is in Light Condition；And
Control module, described control module stop when described microwave oven is in Light Condition described microwave oven power output or
Reduce the operation power of described microwave oven.
8. microwave oven as claimed in claim 7, it is characterised in that described detection module includes:
First resistance, one end of described first resistance and one end of resonant capacitance connect,
Second resistance, one end of described second resistance is connected with the other end of described first resistance, another of described second resistance
End ground connection, wherein, has primary nodal point between described first resistance and described second resistance；
3rd resistance, one end of described 3rd resistance and the other end of described resonant capacitance connect, and
4th resistance, one end of described 4th resistance is connected with the other end of described 3rd resistance, another of described 4th resistance
End ground connection, wherein, has secondary nodal point between described 3rd resistance and described 4th resistance；
Described detection module is for detecting described current resonant frequency by described primary nodal point and described secondary nodal point.
9. microwave oven as claimed in claim 7, it is characterised in that described detection module includes:
Driving pulse width detection module, described driving pulse width detection module is for detection described high voltage variable within the described setting time period
The driving pulsewidth of the primary side of depressor；
Described detection module is for obtaining described current resonant frequency according to described driving pulsewidth.
10. microwave oven as claimed in claim 7, it is characterised in that described detection module includes:
Harmonic period detection module, described harmonic period detection module is for detection described high voltage variable within the described setting time period
The harmonic period of the primary side of depressor；
Described detection module is for obtaining described current resonant frequency according to described harmonic period.
11. microwave ovens as claimed in claim 7, it is characterised in that described detection module includes:
Resonance times detection module, described resonance times detection module is for detection described high voltage variable within the described setting time period
The resonance times of the primary side of depressor；
Described detection module is for obtaining described current resonant frequency according to described resonance times.
12. microwave ovens as claimed in claim 7, it is characterised in that described microwave oven includes display module, described control module
For when described microwave oven is in Light Condition and stops the power output of described microwave oven, controlling described display module and show
Error code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610514943.5A CN106211408B (en) | 2016-06-30 | 2016-06-30 | Control method of microwave oven and microwave oven |
Applications Claiming Priority (1)
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| WO2019205251A1 (en) * | 2018-04-26 | 2019-10-31 | 广东美的厨房电器制造有限公司 | Electronic transformer and microwave cooking appliance |
| CN110530553A (en) * | 2019-08-07 | 2019-12-03 | 深圳麦格米特电气股份有限公司 | A kind of magnetron condition detection method, device, controller, circuit and system |
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