CN103152889B - Control method of circuit for controlling power of variable-frequency microwave oven - Google Patents
Control method of circuit for controlling power of variable-frequency microwave oven Download PDFInfo
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- CN103152889B CN103152889B CN201310059011.2A CN201310059011A CN103152889B CN 103152889 B CN103152889 B CN 103152889B CN 201310059011 A CN201310059011 A CN 201310059011A CN 103152889 B CN103152889 B CN 103152889B
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- main control
- microwave oven
- temperature
- power
- voltage
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/686—Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Temperature (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
The invention relates to a circuit control method for controlling the power of a variable-frequency microwave oven. The method comprises the following steps: (1) detecting a real time voltage and a temperature of a main control panel of the microwave oven by a detection circuit, calculating an input power according to the detected voltage and temperature by a main control chip; (2) the main control chip judging whether the microwave oven running procedure is over, (3) if the procedure running is cover, ending a microwave oven detection procedure; (4) if the procedure running is not over, then adjusting input current or input power by a peripheral control circuit, then returning to step (2) and judging again. Known from the technical scheme, the inventive method monitors the voltage and the temperature of the main control panel in real time by the detection circuit, uses stepless power adjustment characteristic of a variable frequency to adjust the input current or reduce the input power in real time, realizes the modification of a power curve, thereby meeting the heat demand of a user with the premise that the temperature rise of the main control panel is not high.
Description
Technical field
The present invention relates to a kind of circuit control method controlling power of variable-frequency microwave oven.
Background technology
At present; the micro-wave oven that market uses controls the temperature detection mainly concentrated on magnetron for the temperature rise of complete machine; but this method does not carry out temperature protection to the computer board in cavity and components and parts, under large power long Time Continuous ruuning situation, easily there is the damage of computer board and components and parts.
Summary of the invention
The object of the present invention is to provide a kind of circuit control method controlling power of variable-frequency microwave oven.
For achieving the above object, present invention employs following technical scheme: the output of testing circuit is connected with the input of main control chip, the output of main control chip is connected with the input of peripheral control circuits, comprises the steps:
(1) testing circuit detects the real-time voltage of micro-wave oven and the temperature of master control borad, and main control chip calculates input power by the voltage that detects and thermometer;
(2) main control chip judges whether running of microwave oven program terminates;
(3) if program end of run, micro-wave oven trace routine stops;
(4) do not terminate if program is run, then adjust input current or input power by peripheral control circuits, then return step (2) and rejudge.
In described step (4), at the end of program is run not, testing circuit cycle detection real-time voltage, main control chip judges that whether real-time voltage is equal with previous voltage, if the equal temperature being detected current master control borad again by testing circuit, main control chip judges that the temperature of current master control borad is whether in normal range (NR), returns step (2) when being in normal range (NR);
If main control chip judges that the result of real-time voltage and previous voltage is no, then return step (1);
If main control chip judges that the result of the temperature of current master control borad is no, then return step (1).
In described step (1), the every 20ms of testing circuit detects the temperature of a current voltage and master control borad, and the every 1s of main control chip calculates an input power.
The calculating voltage of input power and the temperature of master control borad are the mean value that testing circuit detects in 1s.
As shown from the above technical solution, this method passes through the temperature of testing circuit Real-Time Monitoring voltage and master control borad, utilize frequency-conversion microwave oven can the feature of stepless changing power, real-time adjustment input current or reduction input power, realize the correction of power curve, make master control borad under the prerequisite that temperature rise is not high, meet the demand for heat of user.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present invention;
Fig. 2 is flow chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described:
A kind of circuit controlling power of variable-frequency microwave oven as shown in Figure 1, the output of testing circuit 1 is connected with the input of main control chip 2, and the output of main control chip 2 is connected with the input of peripheral control circuits 3.
A kind of circuit control method controlling power of variable-frequency microwave oven as shown in Figure 2, comprises the following steps:
(1) testing circuit detects the real-time voltage of micro-wave oven and the temperature of master control borad, and main control chip calculates input power by the voltage that detects and thermometer;
(2) main control chip judges whether running of microwave oven program terminates;
(3) if program end of run, micro-wave oven trace routine stops;
(4) do not terminate if program is run, then adjust input current or input power by peripheral control circuits, then return step (2) and rejudge.
In described step (4), at the end of program is run not, testing circuit cycle detection real-time voltage, main control chip judges that whether real-time voltage is equal with previous voltage, if the equal temperature being detected current master control borad again by testing circuit, main control chip judges that the temperature of current master control borad is whether in normal range (NR), returns step (2) when being in normal range (NR);
If main control chip judges that the result of real-time voltage and previous voltage is no, then return step (1);
If main control chip judges that the result of the temperature of current master control borad is no, then return step (1).
In described step (1), the every 20ms of testing circuit detects the temperature of a current voltage and master control borad, and the every 1s of main control chip calculates an input power.
The calculating voltage of input power and the temperature of master control borad are the mean value that testing circuit detects in 1s.
Concrete detection method is as follows:
First detect the real-time voltage of micro-wave oven and the temperature of master control borad by testing circuit, main control chip calculates input power by the voltage that detects and thermometer, judge whether running of microwave oven program terminates by main control chip again, if running of microwave oven EP (end of program), micro-wave oven trace routine stops, if running of microwave oven program does not terminate, then by testing circuit cycle detection real-time voltage, and judge that whether this real-time voltage is equal with previous voltage by main control chip, again the real-time voltage of micro-wave oven and the temperature of master control borad is detected by testing circuit if etc., do not returned, if equal, detected the temperature of current master control borad by testing circuit, main control chip judges that the temperature of current master control borad is whether in normal range (NR), then return when being in normal range (NR) and judge whether running of microwave oven program terminates by main control chip again, if not in normal range (NR), return and again detect the real-time voltage of micro-wave oven and the temperature of master control borad by testing circuit.
When testing circuit detects the temperature of the real-time voltage of micro-wave oven and master control borad, the temperature of testing circuit every 20ms detection record current voltage and master control borad, the every 1s of main control chip calculates an input power, and main control chip power taking pressure and the mean value of master control borad temperature in 1s calculate.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (6)
1. control a circuit control method for power of variable-frequency microwave oven, the output of testing circuit is connected with the input of main control chip, and the output of main control chip is connected with the input of peripheral control circuits, comprises the following steps:
(1) testing circuit detects the real-time voltage of micro-wave oven and the temperature of master control borad, and main control chip calculates input power by the voltage that detects and thermometer;
(2) main control chip judges whether running of microwave oven program terminates;
(3) if program end of run, micro-wave oven trace routine stops;
(4) do not terminate if program is run, then adjust input current or input power by peripheral control circuits, then return step (2) and rejudge.
2. the circuit control method of control power of variable-frequency microwave oven according to claim 1, it is characterized in that: in described step (4), at the end of program is run not, testing circuit cycle detection real-time voltage, main control chip judges that whether real-time voltage is equal with previous voltage, if the equal temperature being detected current master control borad again by testing circuit, main control chip judges that the temperature of current master control borad is whether in normal range (NR), returns step (2) when being in normal range (NR).
3. the circuit control method of control power of variable-frequency microwave oven according to claim 2, is characterized in that: if main control chip judges that the result of real-time voltage and previous voltage is no, then return step (1).
4. the circuit control method of control power of variable-frequency microwave oven according to claim 2, is characterized in that: if main control chip judges that the result of the temperature of current master control borad is no, then return step (1).
5. the circuit control method of control power of variable-frequency microwave oven according to claim 1, is characterized in that: in described step (1), the every 20ms of testing circuit detects the temperature of a current voltage and master control borad, and the every 1s of main control chip calculates an input power.
6. the circuit control method of control power of variable-frequency microwave oven according to claim 5, is characterized in that: the calculating voltage of input power and the temperature of master control borad are the mean value that testing circuit detects in 1s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310059011.2A CN103152889B (en) | 2013-02-26 | 2013-02-26 | Control method of circuit for controlling power of variable-frequency microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310059011.2A CN103152889B (en) | 2013-02-26 | 2013-02-26 | Control method of circuit for controlling power of variable-frequency microwave oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103152889A CN103152889A (en) | 2013-06-12 |
| CN103152889B true CN103152889B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310059011.2A Active CN103152889B (en) | 2013-02-26 | 2013-02-26 | Control method of circuit for controlling power of variable-frequency microwave oven |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2953425B1 (en) | 2014-06-03 | 2019-08-21 | Ampleon Netherlands B.V. | Radio frequency heating apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944855A (en) * | 2009-07-07 | 2011-01-12 | 深圳市鑫汇科科技有限公司 | Digital control power supply converter for kitchen range |
| CN102313307A (en) * | 2011-09-13 | 2012-01-11 | 深圳麦格米特电气股份有限公司 | Method of switching power for variable frequency microwave oven |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8330085B2 (en) * | 2008-05-13 | 2012-12-11 | Panasonic Corporation | Spread-spectrum high-frequency heating device |
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2013
- 2013-02-26 CN CN201310059011.2A patent/CN103152889B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944855A (en) * | 2009-07-07 | 2011-01-12 | 深圳市鑫汇科科技有限公司 | Digital control power supply converter for kitchen range |
| CN102313307A (en) * | 2011-09-13 | 2012-01-11 | 深圳麦格米特电气股份有限公司 | Method of switching power for variable frequency microwave oven |
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| CN103152889A (en) | 2013-06-12 |
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Owner name: WHIRLPOOL (CHINA) CO., LTD. Free format text: FORMER NAME: HEFEI RONGSHIDA SANYO ELECTRIC CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 230088 No. 96 science Avenue, hi tech Zone, Anhui, Hefei Patentee after: Whirlpool (China) Limited by Share Ltd Address before: 230088 No. 96 science Avenue, hi tech Zone, Anhui, Hefei Patentee before: Hefei Rongshida Sanyo Electric Co., Ltd. |