CN204392611U - The heating control circuit of electricity cooking pot and electric cooking pot - Google Patents
The heating control circuit of electricity cooking pot and electric cooking pot Download PDFInfo
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- CN204392611U CN204392611U CN201520080645.0U CN201520080645U CN204392611U CN 204392611 U CN204392611 U CN 204392611U CN 201520080645 U CN201520080645 U CN 201520080645U CN 204392611 U CN204392611 U CN 204392611U
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- potential drop
- dividing potential
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Abstract
The utility model discloses a kind of heating control circuit of electric cooking pot and electric cooking pot, described heating control circuit comprises: LC oscillating circuit, and one end of LC oscillating circuit is connected with power supply module; Switching device; Carry out dividing potential drop delay process respectively to generate the dividing potential drop delay circuit of the first voltage signal and the second voltage signal to the oscillating voltage of the LC oscillating circuit other end, dividing potential drop delay circuit is connected with the other end of LC oscillating circuit; Compare the first voltage signal and the second voltage signal with the comparator of the output switching activity signal when oscillating voltage is less than predeterminated voltage, comparator is connected with dividing potential drop delay circuit; And controller, controller is connected with comparator, and controller controls switching device when receiving energizing signal open-minded.Heating control circuit of the present utility model, when electric cooking pot heats in high voltage low-power, it is too high that this heating control circuit avoids switching device turning-on voltage, reduces noise, extends the useful life of switching device.
Description
Technical field
The utility model relates to technical field of electric appliances, particularly relates to a kind of heating control circuit of electric cooking pot and electric cooking pot.
Background technology
At present, scheme opened by electromagnetic oven heating control switch pipe, great majority use LC two ends to take out two-way voltage signal, control switch pipe is open-minded, this control program is too single, and this scheme is when high voltage low-power heats, and switching tube turning-on voltage can be caused too high, produce larger noise, even burn out switching tube.
Therefore, the control program of switching tube haves much room for improvement.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model is the heating control circuit proposing a kind of electric cooking pot, and when electric cooking pot heats in high voltage low-power, it is too high that this heating control circuit avoids switching device turning-on voltage, reduce noise, extend the useful life of switching device.
Second object of the present utility model is to propose a kind of electric cooking pot.
To achieve these goals, the heating control circuit of the electric cooking pot that the utility model proposes on the one hand, comprising: LC oscillating circuit, one end of described LC oscillating circuit is connected with power supply module; Switching device; Carry out dividing potential drop delay process respectively to generate the dividing potential drop delay circuit of the first voltage signal and the second voltage signal to the oscillating voltage of the described LC oscillating circuit other end, described dividing potential drop delay circuit is connected with the other end of described LC oscillating circuit; Compare described first voltage signal and the second voltage signal with the comparator of the output switching activity signal when described oscillating voltage is less than predeterminated voltage, described comparator is connected with described dividing potential drop delay circuit; And controller, described controller is connected with described comparator, and described controller controls described switching device when receiving described energizing signal open-minded.
According to the heating control circuit of electric cooking pot of the present utility model, dividing potential drop delay circuit carries out two-way dividing potential drop delay process to generate the first voltage signal and the second voltage signal to the oscillating voltage of LC oscillating circuit, comparator compares with the output switching activity signal when oscillating voltage is less than predeterminated voltage to the first voltage signal and the second voltage signal, controller then controls switching device when receiving energizing signal open-minded, when electric cooking pot heats in high voltage low-power, it is too high that this heating control circuit avoids switching device turning-on voltage, reduce noise, extend the useful life of switching device.
In the utility model, described dividing potential drop delay circuit comprises: the first dividing potential drop delay unit exporting described first voltage signal, one end of described first dividing potential drop delay unit is connected with the other end of described LC oscillating circuit, 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 is connected with the other end of described LC oscillating circuit, and the other end of described second dividing potential drop delay unit is connected with the inverting input of described comparator.
In the utility model, the voltage swing that the delay time of described first dividing potential drop delay unit and described second dividing potential drop delay unit is all divided to it is inverse correlation relation.
In the utility model, described first dividing potential drop delay unit comprises: the first resistance, and one end of described first resistance is connected with the other end of described LC oscillating circuit, and the other end of described first resistance 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, the other end ground connection of described second resistance; First electric capacity, one end of described first electric capacity is connected with the normal phase input end of described comparator, the other end ground connection of described first electric capacity.
In the utility model, described second dividing potential drop delay unit comprises: the 3rd resistance, and one end of described 3rd resistance is connected with the other end of described LC oscillating circuit, and the other end of described 3rd resistance 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, the other end ground connection of described 4th resistance; Second electric capacity, one end of described second electric capacity is connected with the inverting input of described comparator, the other end ground connection of described second electric capacity.
In the utility model, described switching device is controllable silicon, IGBT, metal-oxide-semiconductor or relay.
In the utility model, when described switching device is IGBT, the collector electrode of described IGBT is connected with the other end of described LC oscillating circuit, and described in the Men Jiyu of described IGBT, controller is connected, the grounded emitter of described IGBT.
In the utility model, described LC oscillating circuit is serial oscillation circuit or parallel oscillatory circuit.
To achieve these goals, the electric cooking pot that the utility model proposes on the other hand, comprises the heating control circuit of described electric cooking pot.
According to electric cooking pot of the present utility model, owing to being provided with heating control circuit of the present utility model, when electric cooking pot heats in high voltage low-power, avoid switching device turning-on voltage too high, reduce noise, extend the useful life of switching device, thus improve the Consumer's Experience of electric cooking pot.
In the utility model, described electric cooking pot is electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker.
Accompanying drawing explanation
Fig. 1 is the block diagram of the heating control circuit according to electric cooking pot of the present utility model;
Fig. 2 is the circuit diagram of the heating control circuit according to electric cooking pot of the present utility model.
Reference numeral:
LC oscillating circuit 100, switching device 200, dividing potential drop delay circuit 300, comparator 400, controller 500, first dividing potential drop delay unit 310, second dividing potential drop delay unit 320, first resistance R11, the second resistance R12, the first electric capacity C11, the 3rd resistance R21, the 4th resistance R22, the second electric capacity C21, power supply module 10, inductance L 1 and electric capacity C1.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Below with reference to the accompanying drawings the heating control circuit of electric cooking pot of the present utility model and electric cooking pot are described.
Fig. 1 is the block diagram of the heating control circuit according to electric cooking pot of the present utility model.As shown in Figure 1, the heating control circuit of electric cooking pot of the present utility model, comprising: LC oscillating circuit 100, switching device 200, dividing potential drop delay circuit 300, 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 is connected with the other end of LC oscillating circuit 100, and the oscillating voltage of dividing potential drop delay circuit 300 pairs of LC oscillating circuit other ends carries out dividing potential drop delay process respectively to generate the first voltage signal and the second voltage signal; Comparator 400 is connected with dividing potential drop delay circuit 300, and comparator 400 compares with the output switching activity signal when oscillating voltage is less than predeterminated voltage to the first voltage signal and the second voltage signal; Controller 500 is connected with comparator 400, and controller 500 controls switching device 200 when receiving energizing signal open-minded.
In the utility model, switching device 200 is controllable silicon, IGBT, metal-oxide-semiconductor or relay.
In the utility model, when switching device is IGBT, as shown in Figure 2, the collector electrode C of IGBT is connected with the other end of LC oscillating circuit 100, and the door collection G of IGBT is connected with controller 500, the emitter E ground connection of IGBT.
In the utility model, LC oscillating circuit 100 is serial oscillation circuit or parallel oscillatory circuit.Wherein, the LC oscillating circuit 100 in Fig. 2 is for parallel oscillatory circuit.
In the utility model, as shown in Figure 2, dividing potential drop delay circuit 300, comprising: export the first dividing potential drop delay unit 310 of the first voltage signal and export the second dividing potential drop delay unit 320 of 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, and the other end of the first dividing potential drop delay unit 310 is connected with the normal phase input end of comparator 400; One end of second dividing potential drop delay unit 320 is connected with the other end of LC oscillating circuit 100, and the other end of the second dividing potential drop delay unit 320 is connected with the inverting input of comparator 400.
In the utility model, the voltage swing that 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 is inverse correlation relation.
Particularly, the voltage swing that 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 is inverse relationship, the dividing potential drop delay unit that namely dividing potential drop is large does little time delay or not time delay, the dividing potential drop delay unit that dividing potential drop is little does large time delay, by regulating dividing potential drop and the delay parameter of the first dividing potential drop delay unit 310 and the second dividing potential drop delay unit 320 two-way, comparator 400 overturns when the minimum point of the collector electrode C voltage (i.e. the oscillating voltage of LC oscillating circuit 100 other end) of IGBT or zero point, i.e. output switching activity signal, when controller 500 receives the energizing signal of comparator 400 output, IGBT is open-minded in controller 500 control.
In the utility model, as shown in Figure 2, the first dividing potential drop delay unit 310 comprises: the first resistance R11, and one end of the first resistance R11 is connected with the other end of LC oscillating circuit 100, and the other end of the first resistance R11 is connected with the normal phase input end of comparator 400; One end of second resistance R12, 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 connected with the normal phase input end of comparator 400, the other end ground connection of the first electric capacity C11.
In the utility model, as shown in Figure 2, the second dividing potential drop delay unit 320 comprises: the 3rd resistance R21, and one end of the 3rd resistance R21 is connected with the other end of LC oscillating circuit 100, and the other end of the 3rd resistance R21 is connected with the inverting input of comparator 400; One end of 4th resistance R22, 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 connected with the inverting input of comparator 400, the other end ground connection of the second electric capacity C21.
In addition, as shown in Figure 2, power supply module 10 comprises AC/DC conversion, inductance L 1 and electric capacity C1, wherein, the input of AC/DC conversion is connected with alternating current, and the V+ that one end and the AC/DC of inductance L 1 convert holds and is connected, and the other end of inductance L 1 is connected with one end of LC oscillating circuit 100, one end of electric capacity C1 is connected with the other end of inductance L 1, and the V-that the other end and the AC/DC of electric capacity C1 convert holds and is connected.
The heating control circuit of electric cooking pot of the present utility model, dividing potential drop delay circuit carries out two-way dividing potential drop delay process to generate the first voltage signal and the second voltage signal to the oscillating voltage of LC oscillating circuit, comparator compares with the output switching activity signal when oscillating voltage is less than predeterminated voltage to the first voltage signal and the second voltage signal, controller then controls switching device when receiving energizing signal open-minded, when electric cooking pot heats in high voltage low-power, it is too high that this heating control circuit avoids switching device turning-on voltage, reduce noise, extend the useful life of switching device.
In order to realize above-described embodiment, the utility model also proposes a kind of electric cooking pot.This electric cooking pot comprises heating control circuit of the present utility model.
In the utility model, electric cooking pot is electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker.
Electric cooking pot of the present utility model, owing to being provided with heating control circuit of the present utility model, when electric cooking pot heats in high voltage low-power, avoid switching device turning-on voltage too high, reduce noise, extend the useful life of switching device, thus improve the Consumer's Experience of electric cooking pot.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
Should be appreciated that each several part of the present utility model can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the application-specific integrated circuit (ASIC) of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (10)
1. a heating control circuit for electric cooking pot, is characterized in that, comprising:
LC oscillating circuit, one end of described LC oscillating circuit is connected with power supply module;
Switching device;
Carry out dividing potential drop delay process respectively to generate the dividing potential drop delay circuit of the first voltage signal and the second voltage signal to the oscillating voltage of the described LC oscillating circuit other end, described dividing potential drop delay circuit is connected with the other end of described LC oscillating circuit;
Compare described first voltage signal and the second voltage signal with the comparator of the output switching activity signal when described oscillating voltage is less than predeterminated voltage, described comparator is connected with described dividing potential drop delay circuit; And
Controller, described controller is connected with described comparator, and described controller controls described switching device when receiving described energizing signal open-minded.
2. the heating control circuit of electric cooking pot as claimed in claim 1, is characterized in that, described dividing potential drop delay circuit comprises:
Export the first dividing potential drop delay unit of described first voltage signal, one end of described first dividing potential drop delay unit is connected with the other end of described LC oscillating circuit, 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 is connected with the other end of described LC oscillating circuit, 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 electric cooking pot as claimed in claim 2, is characterized in that, the voltage swing that the delay time of described first dividing potential drop delay unit and described second dividing potential drop delay unit is all divided to it is inverse correlation relation.
4. the heating control circuit of electric cooking pot as claimed in claim 2, is characterized in that, described first dividing potential drop delay unit comprises:
First resistance, one end of described first resistance is connected with the other end of described LC oscillating circuit, and the other end of described first resistance 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, the other end ground connection of described second resistance;
First electric capacity, one end of described first electric capacity is connected with the normal phase input end of described comparator, the other end ground connection of described first electric capacity.
5. the heating control circuit of electric cooking pot as claimed in claim 2, is characterized in that, described second dividing potential drop delay unit comprises:
3rd resistance, one end of described 3rd resistance is connected with the other end of described LC oscillating circuit, and the other end of described 3rd resistance 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, the other end ground connection of described 4th resistance;
Second electric capacity, one end of described second electric capacity is connected with the inverting input of described comparator, the other end ground connection of described second electric capacity.
6. the heating control circuit of electric cooking pot as claimed in claim 1, is characterized in that, described switching device is controllable silicon, IGBT, metal-oxide-semiconductor or relay.
7. the heating control circuit of electric cooking pot as claimed in claim 6, it is characterized in that, when described switching device is IGBT, the collector electrode of described IGBT is connected with the other end of described LC oscillating circuit, described in the Men Jiyu of described IGBT, controller is connected, the grounded emitter of described IGBT.
8. the heating control circuit of the electric cooking pot according to any one of claim 1-7, is characterized in that, described LC oscillating circuit is serial oscillation circuit or parallel oscillatory circuit.
9. an electric cooking pot, is characterized in that, comprises the heating control circuit as described in any one of claim 1-8.
10. electric cooking pot as claimed in claim 9, is characterized in that, described electric cooking pot is electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520080645.0U CN204392611U (en) | 2015-02-04 | 2015-02-04 | The heating control circuit of electricity cooking pot and electric cooking pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520080645.0U CN204392611U (en) | 2015-02-04 | 2015-02-04 | The heating control circuit of electricity cooking pot and electric cooking pot |
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| CN204392611U true CN204392611U (en) | 2015-06-10 |
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| CN201520080645.0U Expired - Fee Related CN204392611U (en) | 2015-02-04 | 2015-02-04 | The heating control circuit of electricity cooking pot and electric cooking pot |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992417A (en) * | 2015-02-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit for electric cooking device, and electric cooking device |
| CN107318183A (en) * | 2017-06-30 | 2017-11-03 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN109982466A (en) * | 2017-12-27 | 2019-07-05 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus and its heating control apparatus and method |
| CN113692079A (en) * | 2021-09-07 | 2021-11-23 | 珠海格力电器股份有限公司 | Electromagnetic heating cooking utensil control method and device and electromagnetic heating cooking utensil |
-
2015
- 2015-02-04 CN CN201520080645.0U patent/CN204392611U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992417A (en) * | 2015-02-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit for electric cooking device, and electric cooking device |
| CN105992417B (en) * | 2015-02-04 | 2024-04-16 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit of electric cooker and electric cooker |
| CN107318183A (en) * | 2017-06-30 | 2017-11-03 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107318183B (en) * | 2017-06-30 | 2020-09-08 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN109982466A (en) * | 2017-12-27 | 2019-07-05 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus and its heating control apparatus and method |
| CN113692079A (en) * | 2021-09-07 | 2021-11-23 | 珠海格力电器股份有限公司 | Electromagnetic heating cooking utensil control method and device and electromagnetic heating cooking utensil |
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Granted publication date: 20150610 Termination date: 20220204 |