CN102156415B - Pan judgment circuit and judgment method thereof - Google Patents
Pan judgment circuit and judgment method thereof Download PDFInfo
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- CN102156415B CN102156415B CN2011100247941A CN201110024794A CN102156415B CN 102156415 B CN102156415 B CN 102156415B CN 2011100247941 A CN2011100247941 A CN 2011100247941A CN 201110024794 A CN201110024794 A CN 201110024794A CN 102156415 B CN102156415 B CN 102156415B
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Abstract
The invention discloses a pan judgment circuit and a judgment method thereof, comprising an MCU (Microprogrammed Control Unit ) controller, an IGBT (Insulated Gate Bipolar Translator) control circuit, a synchronizing circuit, an LC resonant circuit and a rectifier circuit, wherein the MCU controller provides trigger signals and counting pulse signals for the synchronizing circuit and provides IGBT control signals for the IGBT control circuit; the IGBT control circuit is connected with the synchronizing circuit by an automatic control output port and receives the automatic control signals provided by the synchronizing circuit; and the synchronizing circuit is connected with the LC resonant circuit by the resonant circuit A and the resonant circuit B. The judgment method based on the pan judgment circuit can be used for judging the pan to be heated by a software program, and can start a poor-quality pan protection program to the poor-quality pans, thus protecting induction cookers and reducing the damage on the induction cooker. According to a series of program processing, the application environment of the induction cooker is safe and reliable, the damage is reduced to the minimum degree, and the induction cooker can be maintained simply and conveniently.
Description
Technical field
The present invention relates to a kind of pan judging circuit and method of discrimination thereof, particularly relate to a kind of pan judging circuit and method of discrimination thereof that is applied on the electromagnetic oven.
Background technology
Electromagnetic oven has entered into huge numbers of families at present, but because unique principle of work and the restriction of electronic technology at present of electromagnetic oven has only the pan of few part material to be adapted at heating on the electromagnetic oven.But in market, but be flooded with the pan that is not suitable for heating material in a large number; In order to let this pan also can on electromagnetic oven, heat; Just need a kind of method and can determine this pan, thereby take some safeguard measures timely, guarantee the electromagnetic oven reliable work.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of pan judging circuit and method of discrimination thereof are provided, and the pan that electromagnetic oven uses in the time of differentiating heating is automatically protected electromagnetic oven; And make electromagnetic oven safe and reliable, reduced the loss of electromagnetic oven.
In order to achieve the above object; The technical scheme that the present invention adopts is: a kind of pan judging circuit comprises MCU controller, insulated gate bipolar transistor IGBT (abbreviation of English Insulated Gate Bipolar Transistor) control circuit, synchronizing circuit, LC resonant circuit and rectification circuit.The MCU controller is connected with synchronizing circuit through the flip-flop number delivery outlet, triggers and count signal for synchronizing circuit provides; The MCU controller is connected with the IGBT control circuit through IGBT control delivery outlet, for the IGBT control circuit provides IGBT control signal; The IGBT control circuit links to each other with synchronizing circuit through controlling delivery outlet automatically, for synchronizing circuit provides automatic control signal; Synchronizing circuit links to each other with the LC resonant circuit through the resonant circuit A resonant circuit B of parallel connection; Rectification circuit is connected the output terminal of LC resonant circuit and IGBT control circuit, and signal is carried out rectifying and wave-filtering.
A kind of method of discrimination based on the pan judging circuit, its step is following:
After step 1, the electromagnetic oven switch opens, differentiate the pan program start;
Step 2, MCU controller send the IGBT control signal, continue to close the IGBT control signal after 4～5 microseconds;
The upset pulse number n of resonant circuit A resonant circuit B in synchronizing circuit in step 3, MCU controller write down 5 milliseconds;
Step 4, judged whether the pan heating according to upset pulse number n;
Step 5,1 n 10, and the pan heating is then arranged, execution in step 6, otherwise do not have pan heating execution in step 1;
Upset pulse number N in step 6, MCU control circuit write down 100 milliseconds;
Whether step 7, judgement upset pulse number N are allowing within the pan scope of using;
Step 8, within the pan scope of allow using, then start the protection setting program of common pan, otherwise start pan protection setting program inferior;
Step 9, entering heating schedule.
4～5 microseconds described in the step 2, step 3 described 5 milliseconds and step 6 are preset value for described 100 milliseconds, and different systems is set to other values as the case may be.IGBT control signal described in the step 2 is an impulse level, promptly stops after 4～5 microseconds carrying.The scope of n, N is a preset value, and different systems is set to other values as the case may be.
Compared with prior art; The invention has the beneficial effects as follows: whether the pan that uses when judging that through programmed control electromagnetic oven starts is the pan that allows realization; During for pan inferior, be provided with through the protection of the pan inferior in the program and protect electromagnetic oven, prolonged the life-span of electromagnetic oven; Be convenient to the use of better maintaining electromagnetic oven, reduced maintenance and maintenance cost.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention; Fig. 2 is a program flow diagram of the present invention.
Embodiment
Purport of the present invention is to overcome the deficiency of prior art; A kind of pan judging circuit and method of discrimination thereof are provided, and the pan that electromagnetic oven uses in the time of differentiating heating is automatically protected electromagnetic oven; And make electromagnetic oven safe and reliable, reduced the loss of electromagnetic oven.Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that technical characterictic of the present invention and advantage are carried out more deep annotation.
Circuit theory diagrams of the present invention are as shown in Figure 1, and a kind of pan judging circuit comprises MCU controller, IGBT control circuit, synchronizing circuit, LC resonant circuit and rectification circuit.The MCU controller is connected with synchronizing circuit through the flip-flop number delivery outlet, for synchronizing circuit provides the flip-flop number signal; The MCU controller is connected with the IGBT control circuit through IGBT control delivery outlet, for the IGBT control circuit provides IGBT control signal; The IGBT control circuit links to each other with synchronizing circuit through controlling delivery outlet automatically, for synchronizing circuit provides automatic control signal; Synchronizing circuit links to each other with the LC resonant circuit through the resonant circuit A resonant circuit B of parallel connection; Rectification circuit is connected the output terminal of LC resonant circuit and IGBT control circuit, and signal is carried out rectifying and wave-filtering.
Software flow pattern of the present invention is as shown in Figure 2, a kind of method of discrimination based on the pan judging circuit, and its step is following:
After step 1, the electromagnetic oven switch opens, differentiate the pan program start;
Step 2, MCU controller send the IGBT control signal, continue to close the IGBT control signal after 4～5 microseconds;
The upset pulse number n of resonant circuit A resonant circuit B in synchronizing circuit in step 3, MCU controller write down 5 milliseconds;
Step 4, judged whether the pan heating according to upset pulse number n;
Step 5,1 n 10, and the pan heating is then arranged, execution in step 6, otherwise do not have pan heating execution in step 1;
Upset pulse number N in step 6, MCU control circuit write down 100 milliseconds;
Whether step 7, judgement upset pulse number N are allowing within the pan scope of using;
Step 8, within the pan scope of allow using, then start the protection setting program of common pan, otherwise start pan protection setting program inferior;
Step 9, entering heating schedule.
4～5 microseconds described in the step 2, step 3 described 5 milliseconds and step 6 are preset value for described 100 milliseconds, and different systems is set to other values as the case may be.IGBT control signal described in the step 2 is an impulse level, promptly stops after 4～5 microseconds carrying.The scope of n, N is a preset value, and different systems is set to other values as the case may be.
In concrete work,, when electromagnetic oven begins to heat, judge through the program setting of MCU controller whether the current pan that needs to heat is the pan material that electromagnetic oven allows heating through the program setting of MCU controller.Through judging,, need not to increase in addition defence program for the heating pan of common permission then starts common pan setting; If be judged as pan inferior, then the MCU controller in electromagnetic circuit this moment starts pan protection setting program inferior, and electromagnetic oven is protected, and reduces the infringement to electromagnetic oven.Through a series of routine processes, make that the environment for use of electromagnetic oven is safe and reliable, and infringement is reduced to minimum level, safeguard simple and convenient.
Although how the present invention carries out electromagnetic oven through specific embodiment pan is differentiated and clear and complete description has been made in the protection processing of pan heating inferior; But the present invention is not limited only to the software operation method mentioned among the said embodiment, reaches through simple process variations the electromagnetic oven pan is differentiated and the purpose of protection is contingent and all is included in the present invention.
Claims (5)
1. pan judging circuit; This circuit comprises MCU controller, IGBT control circuit, synchronizing circuit, LC resonant circuit and rectification circuit; It is characterized in that: described MCU controller is connected with synchronizing circuit through the flip-flop number delivery outlet; The MCU controller is connected with the IGBT control circuit through IGBT control delivery outlet, and the IGBT control circuit links to each other with synchronizing circuit through controlling delivery outlet automatically, and synchronizing circuit links to each other with the LC resonant circuit through the resonant circuit A resonant circuit B of parallel connection.
2. pan judging circuit according to claim 1 is characterized in that: described rectification circuit links to each other with the IGBT control circuit with the LC resonant circuit.
3. the pan method of discrimination of each described pan judging circuit in the application rights 1～2, its step is following:
After step 1, the electromagnetic oven switch opens, differentiate the pan program start;
Step 2, MCU controller send the IGBT control signal, continue to close the IGBT control signal after 4～5 microseconds;
The upset pulse number n of resonant circuit A resonant circuit B in synchronizing circuit in step 3, MCU controller write down 5 milliseconds;
Step 4, judged whether the pan heating according to upset pulse number n;
Step 5,1 n 10, and the pan heating is then arranged, execution in step 6, otherwise do not have pan heating execution in step 1;
Upset pulse number N in step 6, MCU control circuit write down 100 milliseconds;
Whether step 7, judgement upset pulse number N are allowing within the pan scope of using;
Step 8, within the pan scope of allow using, then start the protection setting program of common pan, otherwise start pan protection setting program inferior;
Step 9, entering heating schedule.
4. pan method of discrimination according to claim 3 is characterized in that: 4～5 microseconds described in the step 2, step 3 described 5 milliseconds and step 6 are preset value for described 100 milliseconds, can be set to other values as the case may be.
5. pan method of discrimination according to claim 3 is characterized in that: the scope of described upset pulse number n and N is a preset value, can be set to other values as the case may be.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100247941A CN102156415B (en) | 2011-01-24 | 2011-01-24 | Pan judgment circuit and judgment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100247941A CN102156415B (en) | 2011-01-24 | 2011-01-24 | Pan judgment circuit and judgment method thereof |
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| Publication Number | Publication Date |
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| CN102156415A CN102156415A (en) | 2011-08-17 |
| CN102156415B true CN102156415B (en) | 2012-11-07 |
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| CN2011100247941A Active CN102156415B (en) | 2011-01-24 | 2011-01-24 | Pan judgment circuit and judgment method thereof |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102905411B (en) * | 2012-10-17 | 2015-02-25 | 美的集团股份有限公司 | Control circuit for cookware material judgment and method thereof |
| CN103607798B (en) * | 2013-11-15 | 2015-09-02 | 美的集团股份有限公司 | The detection method of pan type and electromagnetic heater |
| CN105852649B (en) * | 2015-01-19 | 2019-05-21 | 佛山市顺德区美的电热电器制造有限公司 | Self checking method, self-checking unit and the cooking apparatus of cooking apparatus |
| CN104597356B (en) * | 2015-01-30 | 2018-06-19 | 广东美的厨房电器制造有限公司 | For the cookware detection method and detection device of cooking apparatus |
| CN106152194B (en) * | 2015-04-08 | 2020-02-14 | 浙江绍兴苏泊尔生活电器有限公司 | Cooker heating control method, cooker and induction cooker |
| CN106152193B (en) * | 2015-04-08 | 2019-01-11 | 美的集团股份有限公司 | Electromagnetic heating system and its cookware detection circuit, detection method |
| CN106813269B (en) * | 2015-11-27 | 2020-06-19 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment |
| CN108627541B (en) * | 2017-03-22 | 2021-04-20 | 佛山市顺德区美的电热电器制造有限公司 | Method and circuit for judging material of heated device and electromagnetic heating equipment |
| CN107315198A (en) * | 2017-06-19 | 2017-11-03 | 浙江绍兴苏泊尔生活电器有限公司 | induction cooker and cooker detection method |
| 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 |
| CN110613313B (en) * | 2018-06-20 | 2021-07-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating cooking utensil and over-current control method and control device of IGBT (insulated gate bipolar transistor) of electromagnetic heating cooking utensil |
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| CN2311710Y (en) * | 1997-08-18 | 1999-03-24 | 河南省科学院应用物理研究所 | High frequency automatic regulating temperature electromagnetic stove |
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| CN102156415A (en) | 2011-08-17 |
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Owner name: ZHEJIANG ASD LIVING ELECTRICAL APPLIANCE CO., LTD. Free format text: FORMER OWNER: DONGGUAN BUBUGAO ELECTRICAL APPLIANCES CO., LTD. Effective date: 20111024 |
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Free format text: CORRECT: ADDRESS; FROM: 523860 DONGGUAN, GUANGDONG PROVINCE TO: 314112 JIAXING, ZHEJIANG PROVINCE |
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Effective date of registration: 20111024 Address after: 314112, Qian Tang Road, Huimin street, Jiashan County, Zhejiang Province, 18 Applicant after: Zhejiang Taizhou Aishida Electrical Equipment Co., Ltd. Address before: The town of Changan city of Dongguan province Guangdong 523860 Wu Sha Cun Chen Wu Xin'an Industrial Park Dongguan city BBK home appliance Co. Ltd. Applicant before: Dongguan Bubugao Electrical appliances Co., Ltd. |
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