CN105992417A - Heating control circuit for electric cooking device, and electric cooking device - Google Patents
Heating control circuit for electric cooking device, and electric cooking device Download PDFInfo
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- CN105992417A CN105992417A CN201510059083.6A CN201510059083A CN105992417A CN 105992417 A CN105992417 A CN 105992417A CN 201510059083 A CN201510059083 A CN 201510059083A CN 105992417 A CN105992417 A CN 105992417A
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- 238000010411 cooking Methods 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- 230000003534 oscillatory effect Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 235000012054 meals Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Abstract
The invention discloses a heating control circuit for an electric cooking device, and an electric cooking device. The heating control circuit for an electric cooking device comprises an LC oscillation circuit, a switching device, a voltage dividing time-delay circuit, a comparator and a controller, wherein one end of the LC oscillation circuit is connected with a power supply module; the voltage dividing time-delay circuit performs voltage dividing time-delay processing on the oscillating voltage at the other end of the LC oscillation circuit to generate a first voltage signal and a second voltage signal; the voltage dividing time-delay is connected with the other end of the LC oscillation circuit; the comparator compares the first voltage signal with the second voltage signal to output an overturn signal when the oscillating voltage is smaller than the preset voltage; the comparator is connected with the voltage dividing time-delay circuit; and the controller is connected with the comparator, and the controller controls turning on of the switching device when the controller receives the overturn signal. When the electric cooking device starts heating under the high voltage and low power, the heating control circuit avoids overhigh turn-on voltage of the switching device, and can reduce the noise and prolong the service life of the switching device.
Description
Technical field
The present invention relates to technical field of electric appliances, particularly relate to heating control circuit and the electricity cooking pot of a kind of electricity cooking pot.
Background technology
At present, electromagnetic oven heating control switching tube opens scheme, and great majority use LC two ends to take out two-way voltage signal,
Control switching tube is open-minded, and this control program is excessively single, and this scheme is when high voltage low power heats, and can cause
Switching tube turning-on voltage is too high, produces bigger noise, even burns out switching tube.
Therefore, the control program of switching tube haves much room for improvement.
Content of the invention
It is contemplated that one of technical problem solving at least to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the heating control circuit of a kind of electricity cooking pot, when electricity cooking pot is when high voltage low power heats, and this heating
It is too high that control circuit avoids switching device turning-on voltage, reduces noise, extends the service life of switching device.
Second object of the present invention is to propose a kind of electricity cooking pot.
To achieve these goals, the heating control circuit of the electric cooking pot of first aspect present invention embodiment, comprising: LC shakes
Swinging circuit, one end of described LC oscillating circuit is connected with power supply module；Switching device；Another to described LC oscillating circuit
The oscillating voltage of one end carries out dividing potential drop delay process respectively to generate the dividing potential drop time delay electricity of the first voltage signal and the second voltage signal
Road, described dividing potential drop delay circuit is connected with the other end of described LC oscillating circuit；To described first voltage signal and the second voltage
Signal compares with comparator, described comparator and the institute of the output switching activity signal when described oscillating voltage is less than predeterminated voltage
State dividing potential drop delay circuit to be connected；And controller, described controller is connected with described comparator, and described controller is receiving
Control described switching device open-minded during described energizing signal.
The heating control circuit of electric cooking pot according to embodiments of the present invention, the vibration electricity to LC oscillating circuit for the dividing potential drop delay circuit
Pressure carries out two-way dividing potential drop delay process to generate the first voltage signal and the second voltage signal, comparator to the first voltage signal and
Second voltage signal compares with the output switching activity signal when oscillating voltage is less than predeterminated voltage, and controller then turns over receiving
Controlling switching device during rotaring signal open-minded, when electricity cooking pot is when high voltage low power heats, this heating control circuit avoids
Switching device turning-on voltage is too high, reduces noise, extends the service life of switching device.
In one embodiment of the invention, described dividing potential drop delay circuit includes: export first point of described first voltage signal
Pressure delay unit, one end of described first dividing potential drop delay unit is connected with the other end of described LC oscillating circuit, described first point
The other end of pressure delay unit is connected with the normal phase input end of described comparator；Export the second dividing potential drop of described second voltage signal
Delay unit, one end of described second dividing potential drop delay unit is connected with the other end of described LC oscillating circuit, described second dividing potential drop
The other end of delay unit is connected with the inverting input of described comparator.
In one embodiment of the invention, during the time delay of described first dividing potential drop delay unit and described second dividing potential drop delay unit
Between be all inverse correlation relation with its voltage swing being divided to.
In one embodiment of the invention, described first dividing potential drop delay unit includes: the first resistance, described first resistance
One end is connected with the other end of described LC oscillating circuit, the other end of described first resistance and the normal phase input end of described comparator
It is connected；Second resistance, one end of described second resistance is connected with the other end of described first resistance, described second resistance another
One end is grounded；First electric capacity, one end of described first electric capacity is connected with the normal phase input end of described comparator, described first electricity
The other end ground connection held.
In one embodiment of the invention, described second dividing potential drop delay unit includes: the 3rd resistance, described 3rd resistance
One end is connected with the other end of described LC oscillating circuit, the other end of described 3rd resistance and the inverting input of described comparator
It is connected；4th resistance, one end of described 4th resistance is connected with the other end of described 3rd resistance, described 4th resistance another
One end is grounded；Second electric capacity, one end of described second electric capacity is connected with the inverting input of described comparator, described second electricity
The other end ground connection held.
In one embodiment of the invention, described switching device is controllable silicon, IGBT, metal-oxide-semiconductor or relay.
In one embodiment of the invention, when described switching device is IGBT, the colelctor electrode of described IGBT and described LC
The other end of oscillating circuit is connected, and controller described in the Men Jiyu of described IGBT is connected, the grounded emitter of described IGBT.
In one embodiment of the invention, described LC oscillating circuit is serial oscillation circuit or parallel oscillatory circuit.
To achieve these goals, the electric cooking pot of second aspect present invention embodiment, including first aspect present invention embodiment
Heating control circuit.
Electric cooking pot according to embodiments of the present invention, owing to being provided with the heating control circuit of the present invention, when electricity cooking pot is at height
During voltage low power heating, it is to avoid switching device turning-on voltage is too high, reduces noise, extends the use of switching device
Life-span, thus improve the Consumer's Experience of electricity cooking pot.
In one embodiment of the invention, described electricity cooking pot is electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker.
Brief description
Fig. 1 is the block diagram of the heating control circuit of electricity cooking pot according to an embodiment of the invention；
Fig. 2 is the circuit diagram of the heating control circuit of electricity cooking pot according to an embodiment of the invention.
Reference:
LC oscillating circuit the 100th, switching device the 200th, dividing potential drop delay circuit the 300th, comparator the 400th, controller the 500th, first
Dividing potential drop delay unit the 310th, the second dividing potential drop delay unit the 320th, the first resistance R11, the second resistance R12, the first electric capacity C11,
3rd resistance R21, the 4th resistance R22, the second electric capacity C21, power supply module the 10th, inductance L1 and electric capacity C1.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, wherein identical from start to finish
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings heating control circuit and the electricity cooking pot of the electric cooking pot of the embodiment of the present invention are described.
Fig. 1 is the block diagram of the heating control circuit of electricity cooking pot according to an embodiment of the invention.As it is shown in figure 1,
The heating control circuit of the electric cooking pot of the embodiment of the present invention, comprising: LC oscillating circuit the 100th, switching device the 200th, dividing potential drop
Delay circuit the 300th, comparator 400 and controller 500.
Wherein, one end of LC oscillating circuit 100 is connected with power supply module 10；Dividing potential drop delay circuit 300 and LC vibration
The other end of circuit 100 is connected, and the oscillating voltage to the LC oscillating circuit other end for the dividing potential drop delay circuit 300 carries out dividing potential drop respectively
Delay process is to generate the first voltage signal and the second voltage signal；Comparator 400 be connected with dividing potential drop delay circuit 300 be connected,
First voltage signal and the second voltage signal are compared and turn over the output when oscillating voltage is less than predeterminated voltage by comparator 400
Rotaring signal；Controller 500 is connected with comparator 400, and controller 500 controls switching device 200 when receiving energizing signal
Open-minded.
In one embodiment of the invention, switching device 200 is controllable silicon, IGBT, metal-oxide-semiconductor or relay.
In one embodiment of the invention, when switching device is IGBT, as in figure 2 it is shown, the colelctor electrode C of IGBT with
The other end of LC oscillating circuit 100 is connected, and the door collection G of IGBT is connected with controller 500, the emitter E ground connection of IGBT.
In one embodiment of the invention, LC oscillating circuit 100 is serial oscillation circuit or parallel oscillatory circuit.Wherein,
LC oscillating circuit 100 in Fig. 2 is as a example by parallel oscillatory circuit.
In one embodiment of the invention, as in figure 2 it is shown, dividing potential drop delay circuit 300, comprising: export the first voltage letter
Number the first dividing potential drop delay unit 310 and the second dividing potential drop delay unit 320 of output the second voltage signal.
Wherein, one end of the first dividing potential drop delay unit 310 is connected with the other end of LC oscillating circuit 100, the first dividing potential drop time delay
The other end of unit 310 is connected with the normal phase input end of comparator 400；One end of second dividing potential drop delay unit 320 shakes with LC
The other end swinging circuit 100 is connected, the other end of the second dividing potential drop delay unit 320 and the inverting input phase of comparator 400
Even.
In one embodiment of the invention, during the time delay of the first dividing potential drop delay unit 310 and the second dividing potential drop delay unit 320
Between be all inverse correlation relation with its voltage swing being divided to.
Specifically, the delay time of the first dividing potential drop delay unit 310 and the second dividing potential drop delay unit 320 is all divided to it
Voltage swing is inverse relationship, and namely the big dividing potential drop delay unit of dividing potential drop does little time delay or not time delay, the little dividing potential drop of dividing potential drop
Delay unit does big time delay, by regulating the dividing potential drop of the first dividing potential drop delay unit 310 and the second dividing potential drop delay unit 320 two-way
And delay parameter, comparator 400 is in the colelctor electrode C voltage (i.e. the oscillating voltage of LC oscillating circuit 100 other end) of IGBT
Minimum point or upset during zero point, i.e. output switching activity signal, when controller 500 receives the upset letter of comparator 400 output
Number when, it is open-minded that controller 500 controls IGBT.
In one embodiment of the invention, as in figure 2 it is shown, the first dividing potential drop delay unit 310 includes: the first resistance R11,
One end of first resistance R11 is connected with the other end of LC oscillating circuit 100, the other end of the first resistance R11 and comparator
The normal phase input end of 400 is connected；Second resistance R12, one end of the second resistance R12 is connected with the other end of the first resistance R11,
The other end ground connection of the second resistance R12；First electric capacity C11, one end of the first electric capacity C11 is defeated with the positive of comparator 400
Enter end to be connected, the other end ground connection of the first electric capacity C11.
In one embodiment of the invention, as in figure 2 it is shown, the second dividing potential drop delay unit 320 includes: the 3rd resistance R21,
One end of 3rd resistance R21 is connected with the other end of LC oscillating circuit 100, the other end of the 3rd resistance R21 and comparator
The inverting input of 400 is connected；4th resistance R22, one end of the 4th resistance R22 is connected with the other end of the 3rd resistance R21,
The other end ground connection of the 4th resistance R22；Second electric capacity C21, one end of the second electric capacity C21 is anti-phase defeated with comparator 400
Enter end to be connected, the other end ground connection of the second electric capacity C21.
In addition, as in figure 2 it is shown, power supply module 10 includes AC/DC conversion, inductance L1 and electric capacity C1, wherein, AC/DC
The input of conversion is connected with alternating current, and one end of inductance L1 is connected with the V+ end that AC/DC converts, the other end of inductance L1
Being connected with one end of LC oscillating circuit 100, one end of electric capacity C1 is connected with the other end of inductance L1, another of electric capacity C1
End is connected with the V-end of AC/DC conversion.
The heating control circuit of the electric cooking pot of the embodiment of the present invention, the oscillating voltage to LC oscillating circuit for the dividing potential drop delay circuit enters
Row two-way dividing potential drop delay process is to generate the first voltage signal and the second voltage signal, and comparator is to the first voltage signal and second
Voltage signal compares with the output switching activity signal when oscillating voltage is less than predeterminated voltage, and controller is then receiving upset letter
Number when control switching device open-minded, when electricity cooking pot when high voltage low power heats, this heating control circuit avoids switch
Device turning-on voltage is too high, reduces noise, extends the service life of switching device.
In order to realize above-described embodiment, the present invention also proposes a kind of electricity cooking pot.This electricity cooking pot includes the embodiment of the present invention
Heating control circuit.
In one embodiment of the invention, electricity cooking pot is electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker.
The electric cooking pot of the embodiment of the present invention, owing to being provided with the heating control circuit of the present invention, when electricity cooking pot is at high voltage
During low-power heating, it is to avoid switching device turning-on voltage is too high, reduces noise, extends the service life of switching device,
Thus improve the Consumer's Experience of electricity cooking pot.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
It is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of not conflicting, ability
The feature of the different embodiment described in this specification or example and different embodiment or example can be entered by the technical staff in territory
Row combines and combination.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed
Or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two
Individual, three etc., unless otherwise expressly limited specifically.
It should be appreciated that each several part of the present invention can be realized by hardware, software, firmware or combinations thereof.In above-mentioned reality
Execute in mode, the software that multiple steps or method can be performed in memory and by suitable instruction execution system by storage or
Firmware realizes.For example, if realized with hardware, and the same in another embodiment, available well known in the art under
Any one in row technology or their combination realize: have the logic gates for realizing logic function to data-signal
Discrete logic, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), existing
Field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that and realize that all or part of step that above-described embodiment method is carried is can
Completing to instruct related hardware by program, described program can be stored in a kind of computer-readable recording medium,
This program upon execution, including one or a combination set of step of embodiment of the method.
Additionally, each functional unit in each embodiment of the present invention can be integrated in a processing module, it is also possible to be each
Individual unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated module was both
The form that can use hardware realizes, it would however also be possible to employ the form of software function module realizes.If described integrated module with
The form of software function module realizes and as independent production marketing or when using, it is also possible to be stored in a computer-readable
Take in storage medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..Although above it has been shown and described that
Embodiments of the invention, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as limitation of the present invention,
Above-described embodiment can be changed, changes, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (10)
1. the heating control circuit of an electricity cooking pot, it is characterised in that include:
LC oscillating circuit, one end of described LC oscillating circuit is connected with power supply module；
Switching device；
The oscillating voltage of the described LC oscillating circuit other end is carried out respectively dividing potential drop delay process with generate the first voltage signal and
The dividing potential drop delay circuit of the second voltage signal, described dividing potential drop delay circuit is connected with the other end of described LC oscillating circuit；
Described first voltage signal and the second voltage signal are compared with the output when described oscillating voltage is less than predeterminated voltage
The comparator of energizing signal, described comparator is connected with described dividing potential drop delay circuit；And
Controller, described controller is connected with described comparator, and described controller controls institute when receiving described energizing signal
State switching device open-minded.
2. the heating control circuit of the electric cooking pot as described in right 1, it is characterised in that described dividing potential drop delay circuit includes:
Export the first dividing potential drop delay unit of described first voltage signal, one end of described first dividing potential drop delay unit and described LC
The other end of oscillating circuit is connected, and the other end of described first dividing potential drop delay unit is connected with the normal phase input end of described comparator；
Export the second dividing potential drop delay unit of described second voltage signal, one end of described second dividing potential drop delay unit and described LC
The other end of oscillating circuit is connected, and the other end of described second dividing potential drop delay unit is connected with the inverting input of described comparator.
3. the heating control circuit of the electric cooking pot as described in right 2, it is characterised in that described first dividing potential drop delay unit and
The delay time of described second dividing potential drop delay unit is all inverse correlation relation with its voltage swing being divided to.
4. the heating control circuit of the electric cooking pot as described in right 2, it is characterised in that described first dividing potential drop delay unit bag
Include:
First resistance, one end of described first resistance is connected with the other end of described LC oscillating circuit, described first resistance another
One end is connected with the normal phase input end of described comparator；
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；
First electric capacity, one end of described first electric capacity is connected with the normal phase input end of described comparator, described first electric capacity another
One end is grounded.
5. the heating control circuit of the electric cooking pot as described in right 2, it is characterised in that described second dividing potential drop delay unit bag
Include:
3rd resistance, one end of described 3rd resistance is connected with the other end of described LC oscillating circuit, described 3rd resistance another
One end is connected with the inverting input of described comparator；
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；
Second electric capacity, one end of described second electric capacity is connected with the inverting input of described comparator, described second electric capacity another
One end is grounded.
6. the heating control circuit of the electric cooking pot as described in right 1, it is characterised in that described switching device be controllable silicon,
IGBT, metal-oxide-semiconductor or relay.
7. the heating control circuit of the electric cooking pot as described in right 6, it is characterised in that when described switching device is IGBT
When, the colelctor electrode of described IGBT is connected with the other end of described LC oscillating circuit, controller described in the Men Jiyu of described IGBT
It is connected, the grounded emitter of described IGBT.
8. the heating control circuit of the electric cooking pot as according to any one of right 1-7, it is characterised in that described LC vibrates
Circuit is serial oscillation circuit or parallel oscillatory circuit.
9. an electricity cooking pot, it is characterised in that include the heating control circuit as described in any one of claim 1-8.
10. electricity cooking pot as claimed in claim 9, it is characterised in that described electricity cooking pot is electromagnetic oven, electromagnetism electricity meal
Pot or prevention electromagnetic pressure cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059083.6A CN105992417B (en) | 2015-02-04 | 2015-02-04 | Heating control circuit of electric cooker and electric cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059083.6A CN105992417B (en) | 2015-02-04 | 2015-02-04 | Heating control circuit of electric cooker and electric cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105992417A true CN105992417A (en) | 2016-10-05 |
| CN105992417B CN105992417B (en) | 2024-04-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510059083.6A Active CN105992417B (en) | 2015-02-04 | 2015-02-04 | Heating control circuit of electric cooker and electric cooker |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412534A (en) * | 2017-08-16 | 2019-03-01 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, heating platform, cooking apparatus and appliance identification method |
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| CN204392611U (en) * | 2015-02-04 | 2015-06-10 | 佛山市顺德区美的电热电器制造有限公司 | The heating control circuit of electricity cooking pot and electric cooking pot |
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| CN1120794A (en) * | 1994-03-31 | 1996-04-17 | 莫利奈克斯公司 | Device for the automatic control and monitoring of power for an induction heating appliance and a method of using this device |
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| CN109412534A (en) * | 2017-08-16 | 2019-03-01 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, heating platform, cooking apparatus and appliance identification method |
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| Publication number | Publication date |
|---|---|
| CN105992417B (en) | 2024-04-16 |
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