CN108731043A - The method for heating and controlling and device of electromagnetic oven - Google Patents
The method for heating and controlling and device of electromagnetic oven Download PDFInfo
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- CN108731043A CN108731043A CN201710280222.7A CN201710280222A CN108731043A CN 108731043 A CN108731043 A CN 108731043A CN 201710280222 A CN201710280222 A CN 201710280222A CN 108731043 A CN108731043 A CN 108731043A
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- electromagnetic oven
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- ceramic pan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
Abstract
The invention discloses a kind of method for heating and controlling of electromagnetic oven and device, the method for heating and controlling of the electromagnetic oven includes：When electromagnetic oven heats cookware, the current heated current of current line voltage and electromagnetic oven that detection electromagnetic oven is inputted, while reading the current service time of IGBT pipes in electromagnetic oven；When the service time of IGBT pipes be more than it is default open threshold value when, according to the service time of current line voltage and IGBT pipes, determine ceramic pan heated current threshold value；Judge whether the current heated current of electromagnetic oven is less than ceramic pan heated current threshold value；When the current heated current of electromagnetic oven is less than ceramic pan heated current threshold value, cookware is judged for ceramic pan, and controls electromagnetic oven and anti-dry computer heating control is carried out to ceramic pan according to preset ceramic pan anti-dry computer heating control rule.The present invention can prevent ceramic pan from leading to because of dry combustion method the crack damage of ceramic pan when being heated on electromagnetic oven.
Description
Technical field
The present invention relates to electromagnetic heating apparatus field more particularly to the method for heating and controlling and device of a kind of electromagnetic oven.
Background technology
With the continuous improvement of living standards, people pursue the diet of health, safety and fashion also higher and higher.Due to
For the efficiency of heating surface of IH heating techniques up to 90% or more, the efficiency of heating surface is much higher than traditional mode of heating, IH heating techniques
It is a kind of safe heating technique popularized the most in cooking appliance.And when using ceramic pan as cooking container, maximum is excellent
Point is heated and heat dissipation is uniform, and can long-time heat preservation, but ceramic pan is simmered suitable for small fire, the stewing or stewed older food of quality
Product.And magnetic conductive metal film or high-temperature firing magnetic conductive metal are compounded in the technology in enamel, and IH heating ceramic pots is allowed to become possibility,
Also occur a variety of ceramic pans that can be heated on electromagnetic oven already on the market at present, electromagnetic oven heating ceramic pan has
The advantages that healthy, environmentally friendly, energy saving, delicious and safe.
However, due to ceramic pan on electromagnetic oven in use, its heat conductivility is poorer than iron pan, when electromagnetic oven heating ceramic pan
When, in the case of anhydrous dry combustion method, the cooking bottom temperature of ceramic pan increases ceramic pan, can be rapidly achieved or more than 500 DEG C, cause to make pottery
Porcelain pot crack damage, to seriously limit use of the ceramic pan on electromagnetic oven.Also, using ceramic pan on electromagnetic oven
When carrying out Baoshang, it is typically necessary and carries out two hours or more long-time heatings, and with the extension of heating time, soup in pot
Constantly evaporation tails off, and the heat balance point in the ceramic pan the bottom of a pan can be moved up constantly, and when the heat balance point in the ceramic pan the bottom of a pan constantly moves up
After can cause accidentally protect or dry combustion method protection not in time situations such as, lead to ceramic pan crack damage.
Invention content
The main purpose of the present invention is to provide a kind of method for heating and controlling of electromagnetic oven, it is intended to prevent ceramic pan in electromagnetism
Lead to ceramic pan crack damage because of dry combustion method when being heated on stove.
To achieve the goals above, the present invention provides a kind of method for heating and controlling of electromagnetic oven, the heating of the electromagnetic oven
Control method includes the following steps：
S10, when electromagnetic oven heats cookware, the current line voltage that is inputted of detection electromagnetic oven and electromagnetic oven are worked as
Preceding heated current, while reading the current service time of IGBT pipes in electromagnetic oven；
S20, when the service time of the IGBT pipes be more than it is default open threshold value when, according to the current alternating current detected
The service time of voltage and the IGBT pipes determines ceramic pan heated current threshold value；
S30, judges whether the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value；
S40 judges that the cookware is when the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value
Ceramic pan, and control electromagnetic oven and ceramic pan progress anti-dry is added according to preset ceramic pan anti-dry computer heating control rule
Thermal control.
Preferably, the step S20 is specially：
When the service time of the IGBT pipes be more than it is described it is default open threshold value when, according to following preset computation rule,
Determine ceramic pan heated current threshold value：
▽ I=A*Vc+B*ton+C；
Wherein, ▽ I are ceramic pan heated current threshold value, and the current line voltage that Vc is inputted by electromagnetic oven, ton is electromagnetism
The current service time of IGBT pipes in stove, A are preset voltage correction factor, and B is preset IGBT pipes service time to correct system
Number, C are preset current threshold correction value.
Preferably, the step S40 includes：
S41, when electromagnetic oven current heated current be less than the ceramic pan heated current threshold value, judge the cookware be make pottery
When porcelain pot, the initial furnace temperature of electromagnetic oven is read, and the actual power of electromagnetic oven is obtained every the first preset time period, recorded simultaneously
Performance number accessed by each time point；
S42 determines the average power content of electromagnetic oven in preset time according to the performance number accessed by each time point；
S43 determines the initial heating dry combustion method temperature difference threshold of ceramic pan according to the average power content of electromagnetic oven in preset time
Value, and read the current furnace temperature of electromagnetic oven；
S44, when the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven initially adds more than described
When hot dry combustion method temperature difference threshold, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops heating；
S45, when the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven be less than or equal to it is described
When initial heating dry combustion method temperature difference threshold, judge there is water in the ceramic pan, control electromagnetic oven has water heating rule according to preset
The ceramic pan is heated.
Preferably, the average power content according to electromagnetic oven in preset time determines the initial heating dry combustion method of ceramic pan
The step of temperature difference threshold is specially：
According to following preset computation rule, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined：
▽ Ta=D*Qm+E；
Wherein, ▽ Ta are the initial heating dry combustion method temperature difference threshold of ceramic pan, and Qm is the average work(of electromagnetic oven in preset time
Rate value, D are preset corrected coefficient of power, and E is preset temperature difference threshold correction value.
Preferably, the step S45 includes：
S451 reads the furnace temperature of electromagnetic oven when judging to have water in the ceramic pan every the second preset time period；
S452 judges the ceramic pan when the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference
Dry-fire condition is heated in low-temperature zone, control electromagnetic oven stops heating；
S453 judges the ceramic pan when the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference
Interior water is in fluidized state, while judging whether the current furnace temperature of electromagnetic oven is more than preset first absolute threshold furnace temperature；
S454 is read when the current furnace temperature of electromagnetic oven is more than the first absolute threshold furnace temperature every third preset time period
The furnace temperature of electromagnetic oven；
S455 judges the ceramic pan when the difference of the adjacent furnace temperature detected twice is more than the preset third temperature difference
Dry-fire condition is heated in high temperature section, control electromagnetic oven stops heating.
Preferably, further include after the step S454：
S456 judges electromagnetism when the difference of the adjacent furnace temperature detected twice is less than or equal to the preset third temperature difference
Whether the furnace temperature of stove is more than preset second absolute threshold furnace temperature；The second absolute threshold furnace temperature is more than first absolute threshold
It is worth furnace temperature；
S457 judges that the ceramic pan is in height when the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating.
In addition, to achieve the above object, the present invention also provides a kind of heating control apparatus of electromagnetic oven, the electromagnetic oven
Heating control apparatus includes：
Detection module, when being heated to cookware for electromagnetic oven, the current line voltage that is inputted of detection electromagnetic oven and
The current heated current of electromagnetic oven, while reading the current service time of IGBT pipes in electromagnetic oven；
Ceramic pan heated current threshold determination module is more than to preset for the service time when the IGBT pipes and opens threshold value
When, according to the service time of the current line voltage and the IGBT pipes detected by the detection module, determine
Ceramic pan heated current threshold value；
Judgment module, for judging whether the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value,
And when the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value, judge the cookware for ceramic pan；
Anti-dry control module, for when it is ceramic pan that the judgment module, which determines the cookware, controlling electromagnetic oven
Anti-dry computer heating control is carried out to the ceramic pan according to preset ceramic pan anti-dry computer heating control rule.
Preferably, the ceramic pan heated current threshold determination module is specifically used for：
When the service time of the IGBT pipes be more than it is described it is default open threshold value when, according to following preset computation rule,
Determine ceramic pan heated current threshold value：
▽ I=A*Vc+B*ton+C；
Wherein, ▽ I are ceramic pan heated current threshold value, and the current line voltage that Vc is inputted by electromagnetic oven, ton is electromagnetism
The current service time of IGBT pipes in stove, A are preset voltage correction factor, and B is preset IGBT pipes service time to correct system
Number, C are preset current threshold correction value.
Preferably, the anti-dry control module is specifically used for：
When electromagnetic oven current heated current be less than the ceramic pan heated current threshold value, judge the cookware for ceramic pan
When, the initial furnace temperature of electromagnetic oven is read, and the actual power of electromagnetic oven is obtained every the first preset time period, while recording each
Performance number accessed by time point；
According to the performance number accessed by each time point, the average power content of electromagnetic oven in preset time is determined；
According to the average power content of electromagnetic oven in preset time, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined, and
Read the current furnace temperature of electromagnetic oven；
When the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is dry more than the initial heating
When burning temperature difference threshold, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops heating；
When the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is initial less than or equal to described
When heating dry combustion method temperature difference threshold, judge there is water in the ceramic pan, control electromagnetic oven has water heating rule to institute according to preset
Ceramic pan is stated to be heated.
Preferably, the anti-dry control module is additionally operable to：
According to following preset computation rule, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined：
▽ Ta=D*Qm+E；
Wherein, ▽ Ta are the initial heating dry combustion method temperature difference threshold of ceramic pan, and Qm is the average work(of electromagnetic oven in preset time
Rate value, D are preset corrected coefficient of power, and E is preset temperature difference threshold correction value.
Preferably, the anti-dry control module is additionally operable to：
When judging to have water in the ceramic pan, the furnace temperature of electromagnetic oven is read every the second preset time period；
When the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference, judge that the ceramic pan is in low
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating；
When the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference, the water in the ceramic pan is judged
In fluidized state, while judging whether the current furnace temperature of electromagnetic oven is more than preset first absolute threshold furnace temperature；
When the current furnace temperature of electromagnetic oven is more than the first absolute threshold furnace temperature, electromagnetic oven is read every third preset time period
Furnace temperature；
When the difference of the adjacent furnace temperature detected twice is more than the preset third temperature difference, judge that the ceramic pan is in height
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating.
Preferably, the anti-dry control module is additionally operable to：
When the difference of the adjacent furnace temperature detected twice is less than or equal to the preset third temperature difference, the stove of electromagnetic oven is judged
Whether temperature is more than preset second absolute threshold furnace temperature；The second absolute threshold furnace temperature is more than the first absolute threshold stove
Temperature；And when the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature, judge that the ceramic pan adds in high temperature section
Hot dry-fire condition, control electromagnetic oven stop heating.
The present invention provides a kind of method for heating and controlling of electromagnetic oven, and the method for heating and controlling of the electromagnetic oven includes following step
Suddenly：S10, when electromagnetic oven heats cookware, current line voltage and the current of electromagnetic oven that detection electromagnetic oven is inputted add
Thermocurrent, while reading the current service time of IGBT pipes in electromagnetic oven；S20 is more than in advance when the service time of the IGBT pipes
If open threshold value, according to the service time of the current line voltage and the IGBT pipes that detect, determine that ceramic pan adds
Thermocurrent threshold value；S30, judges whether the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value；S40, when
When the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value, the cookware is judged for ceramic pan, and control
Electromagnetic oven carries out anti-dry computer heating control according to preset ceramic pan anti-dry computer heating control rule to the ceramic pan.The present invention
The method for heating and controlling of electromagnetic oven can be effectively prevented ceramic pan causes ceramic pan broken when being heated on electromagnetic oven because of dry combustion method
Rhegma is bad.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the flow diagram of the method for heating and controlling first embodiment of electromagnetic oven of the present invention；
Fig. 2 is the flow diagram of the method for heating and controlling second embodiment of electromagnetic oven of the present invention；
Fig. 3 is the flow diagram of the method for heating and controlling 3rd embodiment of electromagnetic oven of the present invention；
Fig. 4 is the flow diagram of the method for heating and controlling fourth embodiment of electromagnetic oven of the present invention；
Fig. 5 is the high-level schematic functional block diagram of one embodiment of heating control apparatus of electromagnetic oven of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of method for heating and controlling of electromagnetic oven, and the method for heating and controlling of the electromagnetic oven is mainly used in electricity
In the control system of magnetic stove, for preventing ceramic pan from leading to the crack damage of ceramic pan because of dry combustion method when being heated on electromagnetic oven.
Referring to Fig.1, in one embodiment, the method for heating and controlling of the electromagnetic oven includes the following steps：
Step S10, when electromagnetic oven heats cookware, current line voltage and electromagnetic oven that detection electromagnetic oven is inputted
Current heated current, while reading the current service time of IGBT pipes in electromagnetic oven；
Specifically, the method for heating and controlling of the present embodiment electromagnetic oven detects electromagnetism after the heating function of electromagnetic oven is opened
Whether there is cookware on stove, when having detected cookware, the heat driven circuit controlled in electromagnetic oven heats the cookware.
The detection of the current heated current Ic for the current line voltage Vc and electromagnetic oven that the present embodiment inputs electromagnetic oven and electromagnetism
The reading of the current service time ton of IGBT pipes is when electromagnetic oven reaches default heating to the heating duration of the cookware in stove
When long, detection and reading are just proceeded by.Above-mentioned default heating duration can be set as needed.Preferably, this reality
It applies in example, when default heating is 2 seconds a length of, i.e., the present embodiment is to start to detect after electromagnetic oven heats the cookware 2 seconds
The current heated current Ic of current line voltage Vc and electromagnetic oven that electromagnetic oven is inputted, while reading IGBT pipes in electromagnetic oven
Current service time ton.
Step S20, when the service time of the IGBT pipes be more than it is default open threshold value when, it is described current according to what is detected
The service time of line voltage and the IGBT pipes determines ceramic pan heated current threshold value；
Specifically, in the present embodiment, as the current service time ton of IGBT pipes in the electromagnetic oven that step S10 is read
More than it is default open threshold value ty when, according to the service time ton of the current line voltage Vc and the IGBT pipes that detect,
Determine ceramic pan heated current threshold value ▽ I.It is above-mentioned default to open threshold value ty and be set as needed.
In the present embodiment, when the service time ton of the IGBT pipes read be more than it is described it is default open threshold value ty when,
That is ton>When ty, according to following preset computation rule, ceramic pan heated current threshold value ▽ I are determined：
▽ I=A*Vc+B*ton+C；
Wherein, ▽ I are ceramic pan heated current threshold value, and the current line voltage that Vc is inputted by electromagnetic oven, ton is electromagnetism
The current service time of IGBT pipes in stove, A are preset voltage correction factor, and B is preset IGBT pipes service time to correct system
Number, C are preset current threshold correction value.Above-mentioned preset voltage correction factor A, preset IGBT pipes service time correct system
The value of number B and preset current threshold correction value C can be set as needed.
Step S30, judges whether the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value；
Step S40 judges the pot when the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value
Tool is ceramic pan, and controls electromagnetic oven and carry out anti-do to the ceramic pan according to preset ceramic pan anti-dry computer heating control rule
Burn computer heating control.
Specifically, the present embodiment is determining that ceramic pan adds according to above-mentioned computation rule (i.e. ▽ I=A*Vc+B*ton+C)
After thermocurrent threshold value ▽ I, judge whether the current heated current Ic of electromagnetic oven is less than the ceramic pan heated current threshold value ▽
I, when the current heated current Ic for determining electromagnetic oven is less than the ceramic pan heated current threshold value ▽ I, i.e. Ic<When ▽ I, sentence
The cookware on disconnected electromagnetic oven is ceramic pan.When it is ceramic pan that the present embodiment, which determines the cookware on electromagnetic oven, control
Electromagnetic oven processed carries out anti-dry computer heating control according to preset ceramic pan anti-dry computer heating control rule to the ceramic pan, to
Prevent ceramic pan from leading to the crack damage of ceramic pan because of dry combustion method when being heated on electromagnetic oven.
The method for heating and controlling of the present embodiment electromagnetic oven when electromagnetic oven heats cookware, detects electromagnetic oven first
The current heated current Ic of the current line voltage Vc and electromagnetic oven that are inputted, while reading the current of IGBT pipes in electromagnetic oven and opening
Logical time ton；When the service time ton of the IGBT pipes be more than it is default open threshold value ty when (i.e. ton>When ty), according to detection
The service time ton of the current line voltage Vc and the IGBT pipes that arrive determine ceramic pan heated current threshold value ▽ I (▽ I
=A*Vc+B*ton+C)；Then, judge whether the current heated current Ic of electromagnetic oven is less than the ceramic pan heated current threshold value
▽I；(the Ic when the current heated current Ic of electromagnetic oven is less than the ceramic pan heated current threshold value ▽ I<When ▽ I), judge
The cookware is ceramic pan, and when it is ceramic pan that the present embodiment, which determines the cookware, control electromagnetic oven is according to preset ceramics
Pot anti-dry computer heating control rule carries out anti-dry computer heating control to the ceramic pan.The computer heating control side of the present embodiment electromagnetic oven
The phenomenon that method can prevent ceramic pan from leading to ceramic pan crack damage because of dry combustion method when being heated on electromagnetic oven occurs.
Further, with reference to Fig. 2, the method for heating and controlling first embodiment based on electromagnetic oven of the present invention, in electricity of the invention
In the method for heating and controlling second embodiment of magnetic stove, above-mentioned steps S40 includes：
S41, when electromagnetic oven current heated current be less than the ceramic pan heated current threshold value, judge the cookware be make pottery
When porcelain pot, the initial furnace temperature of electromagnetic oven is read, and the actual power of electromagnetic oven is obtained every the first preset time period, recorded simultaneously
Performance number accessed by each time point；
S42 determines the average power content of electromagnetic oven in preset time according to the performance number accessed by each time point；
S43 determines the initial heating dry combustion method temperature difference threshold of ceramic pan according to the average power content of electromagnetic oven in preset time
Value, and read the current furnace temperature of electromagnetic oven；
S44, when the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven initially adds more than described
When hot dry combustion method temperature difference threshold, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops heating；
S45, when the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven be less than or equal to it is described
When initial heating dry combustion method temperature difference threshold, judge there is water in the ceramic pan, control electromagnetic oven has water heating rule according to preset
The ceramic pan is heated.
Specifically, in the present embodiment, when it is ceramic pan to determine the cookware on electromagnetic oven, the first of electromagnetic oven is read
Beginning furnace temperature T1 (in the present embodiment, furnace temperature when initial furnace temperature T1, that is, electromagnetic oven of electromagnetic oven is begun to warm up), also, every first
Preset time period ts1 obtains the actual power Pn of electromagnetic oven, while recording the performance number accessed by each time point；Then,
According to the performance number accessed by each time point, the average power content of electromagnetic oven in preset time is determined.In the present embodiment, obtain
The actual power of electromagnetic oven is actually working as the current line voltage that is inputted according to each time point electromagnetic oven and electromagnetic oven
Preceding heated current calculates the actual power of electromagnetic oven according to formula Pn=Vn*In, wherein Pn is current point in time electromagnetic oven
Actual power, the current line voltage that Vn is inputted by current point in time electromagnetic oven, In are the current of current point in time electromagnetic oven
Heated current；Then, after the actual power for often calculating an electromagnetic oven, the calculation times of the power is recorded, power is worked as
Calculation times when reaching preset times, for example, when the calculation times of power reach 50 times, calculated and obtained according to each time point
The performance number got, determines the average power content Qm of electromagnetic oven in preset time, and in the present embodiment, the preset time works as work(
The calculation times of rate reach the period corresponding at 50 times.In the present embodiment, the time range of above-mentioned preset time can be with
It is set as needed.
The present embodiment, according to the average power content Qm, determines ceramics after the average power content Qm of electromagnetic oven is determined
The initial heating dry combustion method temperature difference threshold ▽ Ta of pot, and read the current furnace temperature Tm of electromagnetic oven.The present embodiment is according to following default
Computation rule, determine the initial heating dry combustion method temperature difference threshold ▽ Ta of ceramic pan：
▽ Ta=D*Qm+E；
Wherein, ▽ Ta are the initial heating dry combustion method temperature difference threshold of ceramic pan, and Qm is the average work(of electromagnetic oven in preset time
Rate value, D are preset corrected coefficient of power, and E is preset temperature difference threshold correction value.In the present embodiment, above-mentioned preset power
Correction factor D and preset temperature difference threshold correction value E can be set as needed.
The present embodiment is in the initial heating dry combustion method temperature difference threshold ▽ that the ceramic pan is calculated according to above-mentioned computation rule
After Ta, the current furnace temperature Tm of electromagnetic oven is read.When the current furnace temperature Tm of electromagnetic oven and initial furnace temperature T1 (the i.e. electromagnetic ovens of electromagnetic oven
The furnace temperature T1 of the electromagnetic oven just read when beginning to warm up) the absolute value of difference be more than the initial heating dry combustion method temperature difference threshold
When value ▽ Ta, i.e. Tm-T1>When ▽ Ta, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops adding
Heat；When the absolute value of the difference of the initial furnace temperature T1 of the current furnace temperature Tm and electromagnetic oven of electromagnetic oven initially adds less than or equal to described
When hot dry combustion method temperature difference threshold ▽ Ta, i.e. Tm-T1 < < ▽ Ta judge there is water in the ceramic pan, and control electromagnetic oven is according to default
Have water heating rule the ceramic pan is heated.In the present embodiment, above-mentioned initial heating dry-fire condition refers to ceramics
Pot is at dry-fire condition when just being begun to warm up on electromagnetic oven, when determining ceramic pan and being in initial heating dry-fire condition,
The present embodiment controls electromagnetic oven and stops heating, to prevent ceramic pan from causing to make pottery because of dry combustion method when just beginning to warm up on electromagnetic oven
Porcelain pot crack damage.
Further, with reference to Fig. 3, the method for heating and controlling second embodiment based on electromagnetic oven of the present invention, in electricity of the invention
In the method for heating and controlling 3rd embodiment of magnetic stove, above-mentioned steps S45 includes：
S451 reads the furnace temperature of electromagnetic oven when judging to have water in the ceramic pan every the second preset time period；
S452 judges the ceramic pan when the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference
Dry-fire condition is heated in low-temperature zone, control electromagnetic oven stops heating；
S453 judges the ceramic pan when the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference
Interior water is in fluidized state, while judging whether the current furnace temperature of electromagnetic oven is more than preset first absolute threshold furnace temperature；
S454 is read when the current furnace temperature of electromagnetic oven is more than the first absolute threshold furnace temperature every third preset time period
The furnace temperature of electromagnetic oven；
S455 judges the ceramic pan when the difference of the adjacent furnace temperature detected twice is more than the preset third temperature difference
Dry-fire condition is heated in high temperature section, control electromagnetic oven stops heating.
Specifically, the method for heating and controlling of the present embodiment electromagnetic oven, when judging to have water in the ceramic pan, every second
Preset time period ts2 reads the furnace temperature of electromagnetic oven, when the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference
When ▽ T1, judge that the ceramic pan is in low-temperature zone heating dry-fire condition, control electromagnetic oven stops heating.It is above-mentioned second it is default when
Between section ts2 and above-mentioned first temperature difference ▽ T1 can be set as needed, it is preferable that in the present embodiment, described second is default
Time period t s2=1 minutes, first temperature difference ▽ T1=5 DEG C.I.e. in the present embodiment, when judging to have water in the ceramic pan,
Judge institute when the difference of the adjacent furnace temperature detected twice is more than preset 5 DEG C every the furnace temperature that 1 minute reads electromagnetic oven
It states ceramic pan and is in low-temperature zone heating dry-fire condition, control electromagnetic oven stops heating.In the present embodiment, above-mentioned low-temperature zone heating is dry
Burning state refers to that the ceramic pan on electromagnetic oven is shortly in dry-fire condition in rigid heating, is in when determining ceramic pan
When low-temperature zone heats dry-fire condition, the present embodiment controls electromagnetic oven and stops heating, to prevent ceramic pan from just having added on electromagnetic oven
Heat leads to ceramic pan crack damage because of dry combustion method soon.
Also, the method for heating and controlling of the present embodiment electromagnetic oven, when judging to have water in the ceramic pan, every 1 minute
The furnace temperature for reading electromagnetic oven judges institute when the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference ▽ T2
The water stated in ceramic pan is in fluidized state, and judges whether the current furnace temperature Tm of electromagnetic oven is more than preset first absolute threshold
Furnace temperature Te, when the current furnace temperature Tm of electromagnetic oven is more than the first absolute threshold furnace temperature Te, i.e. Tm>When Te, when third is preset
Between section ts3 read the furnace temperature of electromagnetic oven, when the difference of the adjacent furnace temperature detected twice is more than preset third temperature difference ▽ T3,
Judge that the ceramic pan is in high temperature section heating dry-fire condition, control electromagnetic oven stops heating.
In the present embodiment, above-mentioned second temperature difference ▽ T2, the first absolute threshold furnace temperature Te, third preset time period ts3 and
Third temperature difference ▽ T3 can be set as needed.Preferably, in the present embodiment, second temperature difference ▽ T2=2 DEG C, institute
State the first Te=85 DEG C of absolute threshold furnace temperature, third preset time period ts3=10 seconds, the third temperature difference ▽ T3=3 DEG C.
I.e. in the present embodiment, when judging to have water in the ceramic pan, every the furnace temperature that 1 minute reads electromagnetic oven, examined twice when adjacent
When the difference of the furnace temperature measured is less than 2 DEG C, judge that the water in the ceramic pan is in fluidized state, the water in the ceramic pan
When in fluidized state, judge whether the current furnace temperature Tm of electromagnetic oven is more than 85 DEG C, when the current furnace temperature Tm of electromagnetic oven is more than 85
DEG C when, i.e. Tm>At 85 DEG C, every the furnace temperature that 10 seconds read electromagnetic oven, when the difference of the adjacent furnace temperature detected twice is more than 3 DEG C
When, judge that the ceramic pan is in high temperature section heating dry-fire condition, control electromagnetic oven stops heating.In the present embodiment, above-mentioned height
Temperature section heating dry-fire condition refer to that water of the ceramic pan in pot on electromagnetic oven is heated to boiling after, water slowly evaporate and
Cause the ceramic pan the phenomenon that dry combustion method occur, when determine ceramic pan be in high temperature section heat dry-fire condition when, the present embodiment
It controls electromagnetic oven and stops heating, to prevent after the water in the ceramic pan is heated to boiling due to the water in pot slowly evaporates
Cause the ceramic pan the phenomenon that dry combustion method occur, and then ceramic pan is prevented the phenomenon that crack damage occur because of high temperature dry combustion method.
Further, with reference to Fig. 4, the method for heating and controlling 3rd embodiment based on electromagnetic oven of the present invention, in electricity of the invention
In the method for heating and controlling fourth embodiment of magnetic stove, further include after above-mentioned steps S454：
S456 sentences when the difference of the adjacent furnace temperature detected twice is less than or equal to the preset third temperature difference (such as 3 DEG C)
Whether the furnace temperature of disconnected electromagnetic oven is more than preset second absolute threshold furnace temperature (Tg)；The second absolute threshold furnace temperature is more than described
First absolute threshold furnace temperature (Te)；
S457 judges that the ceramic pan is in height when the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating.
Specifically, in the present embodiment, when the current furnace temperature Tm of electromagnetic oven is more than above-mentioned first absolute threshold furnace temperature Te, i.e.,
Tm>At 85 DEG C, every the furnace temperature that 10 seconds read electromagnetic oven, preset when the difference of the adjacent furnace temperature detected twice is less than or equal to
The third temperature difference (i.e. 3 DEG C) when, judge electromagnetic oven furnace temperature whether be more than preset second absolute threshold furnace temperature Tg.The present embodiment
In, the second absolute threshold furnace temperature Tg is more than the first absolute threshold furnace temperature Te, i.e. Tg>Te, when the furnace temperature of electromagnetic oven is big
When preset second absolute threshold furnace temperature Tg, judges that the ceramic pan is in high temperature section heating dry-fire condition, control electromagnetic oven
Stop heating, to prevent the ceramic pan from leading to because of dry combustion method the crack damage of ceramic pan.
The present invention also provides a kind of heating control apparatus of electromagnetic oven, with reference to Fig. 5, in one embodiment, the electromagnetic oven
Heating control apparatus 100 includes detection module 101, ceramic pan heated current threshold determination module 102, judgment module 103 and prevents
Dry combustion method control module 104.
Specifically, the detection module 101, when being heated to cookware for electromagnetic oven, detection electromagnetic oven is inputted
The current heated current of current line voltage and electromagnetic oven, while reading the current service time of IGBT pipes in electromagnetic oven.
Specifically, the heating control apparatus of the present embodiment electromagnetic oven detects electromagnetism after the heating function of electromagnetic oven is opened
Whether there is cookware on stove, when having detected cookware, the heat driven circuit controlled in electromagnetic oven heats the cookware.
In the present embodiment, the current heating electricity of current line voltage Vc and electromagnetic oven that the detection module 101 inputs electromagnetic oven
Flow Ic detection and to the reading of the current service time ton of IGBT pipes in electromagnetic oven be in electromagnetic oven to the cookware plus
When hot duration reaches default heating duration, detection and reading are just proceeded by.Above-mentioned default heating duration can be as needed
It is set.Preferably, in the present embodiment, when default heating, is 2 seconds a length of, i.e., the present embodiment is in electromagnetic oven to the pot
After tool heating 2 seconds, the detection module 101 starts to detect the current of the current line voltage Vc that is inputted of electromagnetic oven and electromagnetic oven
Heated current Ic, while reading the current service time ton of IGBT pipes in electromagnetic oven.
The ceramic pan heated current threshold determination module 102, for being preset when the service time of the IGBT pipes is more than
When opening threshold value, the current line voltage detected by the detection module 101 and when opening of the IGBT pipes
Between, determine ceramic pan heated current threshold value.
Specifically, in the present embodiment, when in the electromagnetic oven that the detection module 101 is read IGBT pipes it is current open-minded
Time ton is more than default when opening threshold value ty, and the ceramic pan heated current threshold determination module 102 is according to described in detecting
The service time ton of current line voltage Vc and the IGBT pipes, determine ceramic pan heated current threshold value ▽ I.Above-mentioned preset is opened
Logical threshold value ty can be set as needed.
In the present embodiment, the ceramic pan heated current threshold determination module 102 is specifically used for：
Threshold is opened when the service time ton for the IGBT pipes that the detection module 101 is read is more than described preset
When value ty, i.e. ton>When ty, the ceramic pan heated current threshold determination module 102 is according to following preset computation rule, really
Determine ceramic pan heated current threshold value ▽ I：
▽ I=A*Vc+B*ton+C；
Wherein, ▽ I are ceramic pan heated current threshold value, and the current line voltage that Vc is inputted by electromagnetic oven, ton is electromagnetism
The current service time of IGBT pipes in stove, A are preset voltage correction factor, and B is preset IGBT pipes service time to correct system
Number, C are preset current threshold correction value.Above-mentioned preset voltage correction factor A, preset IGBT pipes service time correct system
The value of number B and preset current threshold correction value C can be set as needed.
The judgment module 103, for judging whether the current heated current of electromagnetic oven is less than ceramic pan heating electricity
Threshold value is flowed, and when the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value, judges that the cookware is
Ceramic pan；
The anti-dry control module 104, for when the judgment module 103 determine the cookware be ceramic pan when,
It controls electromagnetic oven and anti-dry computer heating control is carried out to the ceramic pan according to preset ceramic pan anti-dry computer heating control rule.
Specifically, the present embodiment the ceramic pan heated current threshold determination module 102 according to above-mentioned computation rule (i.e.
▽ I=A*Vc+B*ton+C) ceramic pan heated current threshold value ▽ I are determined after, the judgment module 103 judges electromagnetic oven
Whether current heated current Ic is less than the ceramic pan heated current threshold value ▽ I, when the judgment module 103 determines electromagnetic oven
Current heated current Ic be less than the ceramic pan heated current threshold value ▽ I when, i.e. Ic<When ▽ I, judge described on electromagnetic oven
Cookware is ceramic pan.When it is ceramic pan that the judgment module 103, which determines the cookware on electromagnetic oven, the anti-dried burning control
Molding block 104 controls electromagnetic oven and adds to ceramic pan progress anti-dry according to preset ceramic pan anti-dry computer heating control rule
Thermal control, to prevent ceramic pan from leading to the crack damage of ceramic pan because of dry combustion method when being heated on electromagnetic oven.
Further, in this embodiment the anti-dry control module 104 is specifically used for：
When electromagnetic oven current heated current be less than the ceramic pan heated current threshold value, judge the cookware for ceramic pan
When, the initial furnace temperature of electromagnetic oven is read, and the actual power of electromagnetic oven is obtained every the first preset time period, while recording each
Performance number accessed by time point；
According to the performance number accessed by each time point, the average power content of electromagnetic oven in preset time is determined；
According to the average power content of electromagnetic oven in preset time, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined, and
Read the current furnace temperature of electromagnetic oven；
When the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is dry more than the initial heating
When burning temperature difference threshold, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops heating；
When the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is initial less than or equal to described
When heating dry combustion method temperature difference threshold, judge there is water in the ceramic pan, control electromagnetic oven has water heating rule to institute according to preset
Ceramic pan is stated to be heated.
Specifically, it is ceramic pan when the judgment module 103 determines the cookware on electromagnetic oven in the present embodiment
When, the anti-dry control module 104 read electromagnetic oven initial furnace temperature T1 (in the present embodiment, the initial furnace temperature T1 of electromagnetic oven
Furnace temperature when i.e. electromagnetic oven is begun to warm up), also, the actual power Pn of electromagnetic oven is obtained every the first preset time period ts1, together
Performance number accessed by Shi Jilu each time points；Then, the performance number accessed by each time point, when determining default
The average power content of interior electromagnetic oven.In the present embodiment, the actual power for obtaining electromagnetic oven is actually according to each time point
The current heated current of current line voltage and electromagnetic oven that electromagnetic oven is inputted calculates electromagnetic oven according to formula Pn=Vn*In
Actual power, wherein Pn is the actual power of current point in time electromagnetic oven, and Vn works as by what current point in time electromagnetic oven inputted
Preceding line voltage, In are the current heated current of current point in time electromagnetic oven；Then, the actual power of an electromagnetic oven is often calculated
Afterwards, the calculation times of the power are recorded, when the calculation times of power reach preset times, for example, when the meter of power
Number is calculated when reaching 50 times, the performance number got is calculated according to each time point, determines being averaged for electromagnetic oven in preset time
Performance number Qm, in the present embodiment, the preset time is period corresponding when the calculation times of power reach 50 times.
In the present embodiment, the time range of above-mentioned preset time can be set as needed.
In the present embodiment, after the average power content Qm of electromagnetic oven is determined, the anti-dry control module 104 is according to institute
Average power content Qm is stated, determines the initial heating dry combustion method temperature difference threshold ▽ Ta of ceramic pan, and reads the current furnace temperature Tm of electromagnetic oven.
In the present embodiment, the anti-dry control module 104 is to determine the initial heating of ceramic pan according to following preset computation rule
Dry combustion method temperature difference threshold ▽ Ta：
▽ Ta=D*Qm+E；Wherein, ▽ Ta are the initial heating dry combustion method temperature difference threshold of ceramic pan, and Qm is electricity in preset time
The average power content of magnetic stove, D are preset corrected coefficient of power, and E is preset temperature difference threshold correction value.In the present embodiment, on
Stating preset corrected coefficient of power D and preset temperature difference threshold correction value E can be set as needed.
In the present embodiment, the ceramic pan is being calculated according to above-mentioned computation rule in the anti-dry control module 104
Initial heating dry combustion method temperature difference threshold ▽ Ta after, read the current furnace temperature Tm of electromagnetic oven.As the current furnace temperature Tm and electricity of electromagnetic oven
The absolute value of the difference of the initial furnace temperature T1 (the furnace temperature T1 of the electromagnetic oven read when i.e. electromagnetic oven is just begun to warm up) of magnetic stove
When more than the initial heating dry combustion method temperature difference threshold ▽ Ta, i.e. Tm-T1>When ▽ Ta, judge that the ceramic pan is in initial heating
Dry-fire condition, control electromagnetic oven stop heating；When the difference of the initial furnace temperature T1 of the current furnace temperature Tm and electromagnetic oven of electromagnetic oven
When absolute value is less than or equal to the initial heating dry combustion method temperature difference threshold ▽ Ta, i.e. Tm-T1 < < ▽ Ta judge the ceramic pan
Inside there is water, the anti-dry control module 104 controls electromagnetic oven has water heating rule to carry out the ceramic pan according to preset
Heating.In the present embodiment, above-mentioned initial heating dry-fire condition refers to that ceramic pan when just being begun to warm up on electromagnetic oven, is at
Dry-fire condition, when determining ceramic pan and being in initial heating dry-fire condition, the present embodiment controls electromagnetic oven and stops heating, to
Prevent ceramic pan from leading to ceramic pan crack damage because of dry combustion method when just being begun to warm up on electromagnetic oven.
Further, in this embodiment the anti-dry control module 104 is additionally operable to：
When judging to have water in the ceramic pan, the furnace temperature of electromagnetic oven is read every the second preset time period；
When the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference, judge that the ceramic pan is in low
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating；
When the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference, the water in the ceramic pan is judged
In fluidized state, while judging whether the current furnace temperature of electromagnetic oven is more than preset first absolute threshold furnace temperature；
When the current furnace temperature of electromagnetic oven is more than the first absolute threshold furnace temperature, electromagnetic oven is read every third preset time period
Furnace temperature；
When the difference of the adjacent furnace temperature detected twice is more than the preset third temperature difference, judge that the ceramic pan is in height
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating.
Specifically, the heating control apparatus of the present embodiment electromagnetic oven, it is described anti-dry when judging to have water in the ceramic pan
The furnace temperature that control module 104 reads electromagnetic oven every the second preset time period ts2 is burnt, when the difference of the adjacent furnace temperature detected twice
When value is more than preset first temperature difference ▽ T1, judge that the ceramic pan is in low-temperature zone heating dry-fire condition, control electromagnetic oven stops
Only heat.Above-mentioned second preset time period ts2 and above-mentioned first temperature difference ▽ T1 can be set as needed, it is preferable that this
In embodiment, second preset time period ts2=1 minutes, first temperature difference ▽ T1=5 DEG C.I.e. in the present embodiment, when sentencing
When having water in the disconnected ceramic pan, the furnace temperature that the anti-dry control module 104 read electromagnetic oven every 1 minute, when adjacent two
When the difference of the secondary furnace temperature detected is more than preset 5 DEG C, the anti-dry control module 104 judges that the ceramic pan is in low
Temperature section heats dry-fire condition, and control electromagnetic oven stops heating.In the present embodiment, above-mentioned low-temperature zone heating dry-fire condition refers to electricity
The ceramic pan on magnetic stove is shortly in dry-fire condition in rigid heating, and low-temperature zone heating dry combustion method is in when determining ceramic pan
When state, the anti-dry control module 104 controls electromagnetic oven and stops heating, to prevent ceramic pan from just having been heated on electromagnetic oven
Soon lead to ceramic pan crack damage because of dry combustion method.
Also, the heating control apparatus of the present embodiment electromagnetic oven, when judging to have water in the ceramic pan, every 1 minute
The furnace temperature for reading electromagnetic oven, it is described anti-when the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference ▽ T2
Dry combustion method control module 104 judges that the water in the ceramic pan is in fluidized state, meanwhile, judge that the current furnace temperature Tm of electromagnetic oven is
It is no to be more than preset first absolute threshold furnace temperature Te, when the current furnace temperature Tm of electromagnetic oven is more than the first absolute threshold furnace temperature Te,
That is Tm>When Te, the furnace temperature of electromagnetic oven is read every third preset time period ts3, when the difference of the adjacent furnace temperature detected twice
When more than preset third temperature difference ▽ T3, judge that the ceramic pan is in high temperature section heating dry-fire condition, the anti-dry control
Module 104 controls electromagnetic oven and stops heating.
In the present embodiment, above-mentioned second temperature difference ▽ T2, the first absolute threshold furnace temperature Te, third preset time period ts3 and
Third temperature difference ▽ T3 can be set as needed.Preferably, in the present embodiment, second temperature difference ▽ T2=2 DEG C, institute
State the first Te=85 DEG C of absolute threshold furnace temperature, third preset time period ts3=10 seconds, the third temperature difference ▽ T3=3 DEG C.
I.e. in the present embodiment, when judging to have water in the ceramic pan, every the furnace temperature that 1 minute reads electromagnetic oven, examined twice when adjacent
When the difference of the furnace temperature measured is less than 2 DEG C, judge that the water in the ceramic pan is in fluidized state, the water in the ceramic pan
When in fluidized state, judge whether the current furnace temperature Tm of electromagnetic oven is more than 85 DEG C, when the current furnace temperature Tm of electromagnetic oven is more than 85
DEG C when, i.e. Tm>At 85 DEG C, every the furnace temperature that 10 seconds read electromagnetic oven, when the difference of the adjacent furnace temperature detected twice is more than 3 DEG C
When, judge that the ceramic pan is in high temperature section heating dry-fire condition, the anti-dry control module 104 controls electromagnetic oven and stops adding
Heat.In the present embodiment, above-mentioned high temperature section heating dry-fire condition refers to water heating of the ceramic pan on electromagnetic oven in pot
To after boiling, water slowly evaporates and the ceramic pan is caused the phenomenon that dry combustion method occur, adds in high temperature section when determining ceramic pan
When hot dry-fire condition, the anti-dry control module 104 control electromagnetic oven in the present embodiment stops heating, to prevent from working as institute
State after the water in ceramic pan is heated to boiling causes the ceramic pan the phenomenon that dry combustion method occur due to the water in pot slowly evaporates, into
And ceramic pan is prevented the phenomenon that crack damage occur because of high temperature dry combustion method.
Further, in this embodiment the anti-dry control module 104 is additionally operable to：When the adjacent stove detected twice
Temperature difference be less than or equal to the preset third temperature difference when, the anti-dry control module 104 judge electromagnetic oven furnace temperature whether
More than preset second absolute threshold furnace temperature；The second absolute threshold furnace temperature is more than the first absolute threshold furnace temperature；And
When the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature, the anti-dry control module 104 judges the ceramics
Pot heats dry-fire condition in high temperature section, and control electromagnetic oven stops heating.
Specifically, in the present embodiment, when the current furnace temperature Tm of electromagnetic oven is more than above-mentioned first absolute threshold furnace temperature Te, i.e.,
Tm>At 85 DEG C, every the furnace temperature that 10 seconds read electromagnetic oven, preset when the difference of the adjacent furnace temperature detected twice is less than or equal to
The third temperature difference (i.e. 3 DEG C) when, the anti-dry control module 104 judge electromagnetic oven furnace temperature whether be more than preset second absolutely
To threshold value furnace temperature Tg.In the present embodiment, the second absolute threshold furnace temperature Tg is more than the first absolute threshold furnace temperature Te, i.e. Tg
>Te judges that the ceramic pan is in high temperature section heating when the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature Tg
Dry-fire condition, the anti-dry control module 104 controls electromagnetic oven and stops heating, to prevent the ceramic pan from being led because of dry combustion method
Cause the crack damage of ceramic pan.
The heating control apparatus of the present embodiment electromagnetic oven, first, the detection module 101 add cookware in electromagnetic oven
When hot, the current heated current Ic of current line voltage Vc and electromagnetic oven that detection electromagnetic oven is inputted, while reading electromagnetic oven
The current service time ton of middle IGBT pipes；When the service time ton for the IGBT pipes that the detection module 101 is read is big
In it is default open threshold value ty when (i.e. ton>When ty), the ceramic pan heated current threshold determination module 102 is according to detecting
The service time ton of the current line voltage Vc and the IGBT pipes determine ceramic pan heated current threshold value ▽ I (▽ I=A*
Vc+B*ton+C)；Then, the judgment module 103 judges whether the current heated current Ic of electromagnetic oven is less than the ceramic pan
Heated current threshold value ▽ I；(the Ic when the current heated current Ic of electromagnetic oven is less than the ceramic pan heated current threshold value ▽ I<
When ▽ I), the judgment module 103 judges the cookware for ceramic pan, is when the judgment module 103 determines the cookware
When ceramic pan, it is right according to preset ceramic pan anti-dry computer heating control rule that the anti-dry control module 104 controls electromagnetic oven
The ceramic pan carries out anti-dry computer heating control.The heating control apparatus of the present embodiment electromagnetic oven can be effectively prevented ceramic pan
The phenomenon that leading to ceramic pan crack damage because of dry combustion method when being heated on electromagnetic oven, occurs.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (12)
1. a kind of method for heating and controlling of electromagnetic oven, which is characterized in that the method for heating and controlling of the electromagnetic oven includes following step
Suddenly：
S10, when electromagnetic oven heats cookware, current line voltage and the current of electromagnetic oven that detection electromagnetic oven is inputted add
Thermocurrent, while reading the current service time of IGBT pipes in electromagnetic oven；
S20, when the service time of the IGBT pipes be more than it is default open threshold value when, according to the current line voltage detected
With the service time of the IGBT pipes, ceramic pan heated current threshold value is determined；
S30, judges whether the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value；
S40 judges the cookware for ceramics when the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value
Pot, and control electromagnetic oven and anti-dry heating control is carried out to the ceramic pan according to preset ceramic pan anti-dry computer heating control rule
System.
2. the method for heating and controlling of electromagnetic oven as described in claim 1, which is characterized in that the step S20 is specially：
When the service time of the IGBT pipes be more than it is described it is default open threshold value when, according to following preset computation rule, determine
Ceramic pan heated current threshold value：
▽ I=A*Vc+B*ton+C；
Wherein, ▽ I are ceramic pan heated current threshold value, and the current line voltage that Vc is inputted by electromagnetic oven, ton is in electromagnetic oven
The current service time of IGBT pipes, A are preset voltage correction factor, and B is preset IGBT pipes service time correction factor, C
For preset current threshold correction value.
3. the method for heating and controlling of electromagnetic oven as described in claim 1, which is characterized in that the step S40 includes：
S41, when electromagnetic oven current heated current be less than the ceramic pan heated current threshold value, judge the cookware for ceramic pan
When, the initial furnace temperature of electromagnetic oven is read, and the actual power of electromagnetic oven is obtained every the first preset time period, while recording each
Performance number accessed by time point；
S42 determines the average power content of electromagnetic oven in preset time according to the performance number accessed by each time point；
S43 determines the initial heating dry combustion method temperature difference threshold of ceramic pan according to the average power content of electromagnetic oven in preset time, and
Read the current furnace temperature of electromagnetic oven；
S44, when the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is dry more than the initial heating
When burning temperature difference threshold, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops heating；
S45, when the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is initial less than or equal to described
When heating dry combustion method temperature difference threshold, judge there is water in the ceramic pan, control electromagnetic oven has water heating rule to institute according to preset
Ceramic pan is stated to be heated.
4. the method for heating and controlling of electromagnetic oven as claimed in claim 3, which is characterized in that described according to electromagnetism in preset time
The step of average power content of stove, the initial heating dry combustion method temperature difference threshold for determining ceramic pan is specially：
According to following preset computation rule, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined：
▽ Ta=D*Qm+E；
Wherein, ▽ Ta are the initial heating dry combustion method temperature difference threshold of ceramic pan, and Qm is the average power content of electromagnetic oven in preset time,
D is preset corrected coefficient of power, and E is preset temperature difference threshold correction value.
5. the method for heating and controlling of electromagnetic oven as claimed in claim 3, which is characterized in that the step S45 includes：
S451 reads the furnace temperature of electromagnetic oven when judging to have water in the ceramic pan every the second preset time period；
S452 judges that the ceramic pan is in when the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference
Low-temperature zone heats dry-fire condition, and control electromagnetic oven stops heating；
S453 judges when the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference in the ceramic pan
Water is in fluidized state, while judging whether the current furnace temperature of electromagnetic oven is more than preset first absolute threshold furnace temperature；
S454 reads electromagnetism when the current furnace temperature of electromagnetic oven is more than the first absolute threshold furnace temperature every third preset time period
The furnace temperature of stove；
S455 judges that the ceramic pan is in when the difference of the adjacent furnace temperature detected twice is more than the preset third temperature difference
High temperature section heats dry-fire condition, and control electromagnetic oven stops heating.
6. the method for heating and controlling of electromagnetic oven as claimed in claim 5, which is characterized in that also wrapped after the step S454
It includes：
S456 judges electromagnetic oven when the difference of the adjacent furnace temperature detected twice is less than or equal to the preset third temperature difference
Whether furnace temperature is more than preset second absolute threshold furnace temperature；The second absolute threshold furnace temperature is more than the first absolute threshold stove
Temperature；
S457 judges that the ceramic pan is in high temperature section when the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature
Dry-fire condition is heated, control electromagnetic oven stops heating.
7. a kind of heating control apparatus of electromagnetic oven, which is characterized in that the heating control apparatus of the electromagnetic oven includes：
Detection module, when being heated to cookware for electromagnetic oven, current line voltage and electromagnetism that detection electromagnetic oven is inputted
The current heated current of stove, while reading the current service time of IGBT pipes in electromagnetic oven；
Ceramic pan heated current threshold determination module, for when the service time of the IGBT pipes be more than it is default open threshold value when,
According to the service time of the current line voltage and the IGBT pipes detected by the detection module, ceramics are determined
Pot heated current threshold value；
Judgment module, for judge electromagnetic oven current heated current whether be less than the ceramic pan heated current threshold value, and
When the current heated current of electromagnetic oven is less than the ceramic pan heated current threshold value, judge the cookware for ceramic pan；
Anti-dry control module, for when the judgment module determine the cookware be ceramic pan when, control electromagnetic oven according to
Preset ceramic pan anti-dry computer heating control rule carries out anti-dry computer heating control to the ceramic pan.
8. the heating control apparatus of electromagnetic oven as claimed in claim 7, which is characterized in that the ceramic pan heated current threshold value
Determining module is specifically used for：
When the service time of the IGBT pipes be more than it is described it is default open threshold value when, according to following preset computation rule, determine
Ceramic pan heated current threshold value：
▽ I=A*Vc+B*ton+C；
Wherein, ▽ I are ceramic pan heated current threshold value, and the current line voltage that Vc is inputted by electromagnetic oven, ton is in electromagnetic oven
The current service time of IGBT pipes, A are preset voltage correction factor, and B is preset IGBT pipes service time correction factor, C
For preset current threshold correction value.
9. the heating control apparatus of electromagnetic oven as claimed in claim 7, which is characterized in that the anti-dry control module is specific
For：
When electromagnetic oven current heated current be less than the ceramic pan heated current threshold value, when judging the cookware for ceramic pan,
When reading the initial furnace temperature of electromagnetic oven, and the actual power of electromagnetic oven obtained every the first preset time period, while recording each
Between put accessed performance number；
According to the performance number accessed by each time point, the average power content of electromagnetic oven in preset time is determined；
According to the average power content of electromagnetic oven in preset time, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined, and read
The current furnace temperature of electromagnetic oven；
When the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is more than the initial heating dry combustion method temperature
When poor threshold value, judge that the ceramic pan is in initial heating dry-fire condition, control electromagnetic oven stops heating；
When the absolute value of the difference of the initial furnace temperature of the current furnace temperature and electromagnetic oven of electromagnetic oven is less than or equal to the initial heating
When dry combustion method temperature difference threshold, judge there is water in the ceramic pan, control electromagnetic oven has water heating rule to the pottery according to preset
Porcelain pot is heated.
10. the heating control apparatus of electromagnetic oven as claimed in claim 9, which is characterized in that the anti-dry control module is also
For：
According to following preset computation rule, the initial heating dry combustion method temperature difference threshold of ceramic pan is determined：
▽ Ta=D*Qm+E；
Wherein, ▽ Ta are the initial heating dry combustion method temperature difference threshold of ceramic pan, and Qm is the average power content of electromagnetic oven in preset time,
D is preset corrected coefficient of power, and E is preset temperature difference threshold correction value.
11. the heating control apparatus of electromagnetic oven as claimed in claim 9, which is characterized in that the anti-dry control module is also
For：
When judging to have water in the ceramic pan, the furnace temperature of electromagnetic oven is read every the second preset time period；
When the difference of the adjacent furnace temperature detected twice is more than preset first temperature difference, judge that the ceramic pan is in low-temperature zone
Dry-fire condition is heated, control electromagnetic oven stops heating；
When the difference of the adjacent furnace temperature detected twice is less than preset second temperature difference, judge that the water in the ceramic pan is in
Fluidized state, while judging whether the current furnace temperature of electromagnetic oven is more than preset first absolute threshold furnace temperature；
When the current furnace temperature of electromagnetic oven is more than the first absolute threshold furnace temperature, the stove of electromagnetic oven is read every third preset time period
Temperature；
When the difference of the adjacent furnace temperature detected twice is more than the preset third temperature difference, judge that the ceramic pan is in high temperature section
Dry-fire condition is heated, control electromagnetic oven stops heating.
12. the heating control apparatus of electromagnetic oven as claimed in claim 11, which is characterized in that the anti-dry control module is also
For：
When the difference of the adjacent furnace temperature detected twice is less than or equal to the preset third temperature difference, judge that the furnace temperature of electromagnetic oven is
It is no to be more than preset second absolute threshold furnace temperature；The second absolute threshold furnace temperature is more than the first absolute threshold furnace temperature；With
And when the furnace temperature of electromagnetic oven is more than preset second absolute threshold furnace temperature, judge that the ceramic pan is in high temperature section heating dry combustion method
State, control electromagnetic oven stop heating.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109899843A (en) * | 2019-02-02 | 2019-06-18 | 广东硕高智能科技有限公司 | A kind of electric furnace |
| CN111380088A (en) * | 2018-12-29 | 2020-07-07 | 佛山市顺德区美的电热电器制造有限公司 | Induction cooker and method and device for identifying cooking pot on induction cooker |
| CN113133665A (en) * | 2020-01-17 | 2021-07-20 | 九阳股份有限公司 | Dry burning prevention detection method for cooking appliance and cooking appliance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111380088A (en) * | 2018-12-29 | 2020-07-07 | 佛山市顺德区美的电热电器制造有限公司 | Induction cooker and method and device for identifying cooking pot on induction cooker |
| CN111380088B (en) * | 2018-12-29 | 2022-10-25 | 佛山市顺德区美的电热电器制造有限公司 | Induction cooker and method and device for identifying cooking pot on induction cooker |
| CN109899843A (en) * | 2019-02-02 | 2019-06-18 | 广东硕高智能科技有限公司 | A kind of electric furnace |
| CN113133665A (en) * | 2020-01-17 | 2021-07-20 | 九阳股份有限公司 | Dry burning prevention detection method for cooking appliance and cooking appliance |
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