CN201134020Y - Detection control circuit - Google Patents
Detection control circuit Download PDFInfo
- Publication number
- CN201134020Y CN201134020Y CNU2007203025237U CN200720302523U CN201134020Y CN 201134020 Y CN201134020 Y CN 201134020Y CN U2007203025237 U CNU2007203025237 U CN U2007203025237U CN 200720302523 U CN200720302523 U CN 200720302523U CN 201134020 Y CN201134020 Y CN 201134020Y
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- China
- Prior art keywords
- circuit
- voltage
- control chip
- control circuit
- relay
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 241000209094 Oryza Species 0.000 abstract description 6
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 6
- 235000009566 rice Nutrition 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 3
- 230000005574 cross-species transmission Effects 0.000 abstract 1
- 238000010411 cooking Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 235000014347 soups Nutrition 0.000 description 3
- 238000009835 boiling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Cookers (AREA)
Abstract
The utility model provides a detection control circuit for electric rice cooker, including power supply circuit and the relay of the circuit break-make of the dish that generates heat of control electric rice cooker, its characterized in that still includes: the input end of the voltage detection circuit is connected with the power supply circuit, and the output end of the voltage detection circuit is connected with the control chip; the input end of the control chip is connected with the voltage detection circuit, and the output end of the control chip is connected with the relay; and the control chip controls the on-off time of the relay according to the measured value of the voltage detection circuit. Through the utility model provides a detect control circuit, guarantee that output average power approximately equals under each voltage of 85% commercial voltage to 115% commercial voltage, make electric rice cooker boil congee, a kind of deep pot hot water effect with the same under 220V commercial power pressure, rice water is in the state of rolling again can not spill over always.
Description
Technical field
The utility model relates to the electric cooker technology, relates in particular to a kind of detection control circuit that is used for electric cooker.
Background technology
Existing electric cooker operating voltage range is 220V ± 10%, in low-voltage 198V Baoshang, poor effect when cooking congee, the soup congee that boils can not become juice, after particularly cooking congee 2 hours, be water clearly above, after the spoon of must having a meal stirs, just can see it being congee rather than water, studying carefully its control mode is for preventing that high voltage 242V from cooking congee, Baoshang overflows, so after rice water boiling, the value that average output power is measured during with 242V voltage is as the criterion, owing to there is not voltage detecting, as low pressure 198V the time, its real output is (198/242)
2P=0.67P, average output power when wherein P is 242V, so the weak effect of soup congee is natural.
The utility model content
The purpose of this utility model is to propose a kind of detection control circuit that is used for electric cooker, has solved electric cooker uncontrollable problem of output power under voltage fluctuation.
For achieving the above object, the utility model proposes a kind of detection control circuit, comprise the relay of the power circuit and the connecting and disconnecting of the circuit of the heat-generating disc of control electric cooker, wherein also comprise voltage detecting circuit, its input end connects power circuit, and its output terminal connects control chip; And control chip, its input end connects voltage detecting circuit, and its output terminal connects relay; Control chip is according to the make-and-break time of the measured value pilot relay of voltage detecting circuit.
In above-mentioned detection control circuit, voltage detecting circuit comprises rectifier, voltage divider and wave filter, rectifier and voltage divider series connection, and the dividing potential drop part of voltage divider is in parallel with wave filter.
Wherein, rectifier is a diode, and voltage divider constitutes dividing point for first resistance and second resistance of series connection, the tie point between first resistance and second resistance, and second resistance constitutes the dividing potential drop part, and wave filter is a capacitor.
Above-mentioned detection control circuit also comprises temperature sensor, and it is arranged at the top of electric cooker, and the input end of control chip also connects temperature sensor, and control chip is also according to the make-and-break time of the measured value pilot relay of temperature sensor.
The detection control circuit that the utility model proposes, by detecting the line voltage value, guarantee under each voltage of 115% city's voltage (253V), to export the average power approximately equal at 85% city's voltage (187V), make that electric cooker is cooked congee, the effect of Baoshang is with identical under 220V voltage, Mi Shui is in the state of rolling always and can overflow again.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is a detection control circuit device block diagram of the present utility model;
Fig. 2 is the voltage detecting circuit synoptic diagram of detection control circuit of the present utility model; And
Fig. 3 is the detection control circuit synoptic diagram of embodiment of the present utility model.
Embodiment
Below with reference to accompanying drawing, describe embodiment of the present utility model in detail.
The detection control circuit that the utility model proposes as shown in Figure 1, comprises power circuit 110, voltage detecting circuit 120, temperature sensor 130, control chip 140 and relay 150.
Wherein, voltage detecting circuit 120, input end connects power circuit, and output terminal connects control chip; Temperature sensor 130 is arranged at the top of electric cooker; Control chip 140, its input end connects power circuit, voltage detecting circuit and temperature sensor, its output terminal connects relay, and control chip 140 is according to the make-and-break time of the measured value pilot relay 150 of the measured value of voltage detecting circuit 120 and temperature sensor 130; Relay 150, the connecting and disconnecting of the circuit of the heat-generating disc of control electric cooker.
Wherein, voltage detecting circuit comprises rectifier, voltage divider and wave filter, rectifier and voltage divider series connection, and the dividing potential drop part of voltage divider is in parallel with wave filter.As shown in Figure 2, rectifier is diode D, and voltage divider is first resistance R 1 and second resistance R 2 of series connection, and wave filter is capacitor C.
Specific embodiment of the utility model as shown in Figure 3, this detection control circuit comprises power circuit 310, voltage detecting circuit 320, the temperature sensor (not shown), control chip 340 and relay 350, control chip are single-chip microcomputer.After adding an amount of rice and water in the interior pot of electric cooker, press Baoshang and/or the button of cooking congee, electric cooker enters soup congee automatic mode, and relay closes is with heating with full power.Top at electric cooker is provided with temperature sensor, and this temperature sensor detects the temperature on pot top, and when detecting meter water and seethe with excitement soon (Temperature numerical according to the electric cooker of different structure and difference), voltage detecting circuit begins to detect line voltage.
Civil power passes through R1, R2 dividing potential drop again by the D1 half-wave rectification of voltage detecting circuit, delivers to the A/D mouth of single-chip microcomputer after the electrochemical capacitor C3 filtering, just obtains current magnitude of voltage; By detecting the line voltage value, in software, set up a form, the corresponding relay on-off of each voltage range is than (ratio of make-and-break time), and single-chip microcomputer is read the time of relay on-off under the current voltage with the form of tabling look-up; Because the resistance of electric cooker heat-generating disc is steady state value, so can guarantee each voltage range output average power approximately equal.The corresponding relay on-off ratio of each voltage range, according to detected line voltage value, the time of control chip pilot relay break-make, thus control outputs to the power of the heat-generating disc of electric cooker.The power difference that not isometric electric cooker is required is generally got 100W.
In the control procedure of single-chip microcomputer, can finely tune, two kinds of different modes are arranged output power:
First kind of mode, when detecting pot top temperature and be higher than T1, relay disconnects, and closes output power; When detecting pot top temperature and be lower than T2, recover to detect the control of Control of Voltage output power, wherein T1 is greater than T2.
The second way is when detecting pot top temperature and be lower than T3, with 100% output power; When detecting pot top temperature and be higher than T4, recover to detect the control of Control of Voltage output power, wherein T4 is greater than T3.
The detection control circuit that the utility model proposes, by detecting the line voltage value, guarantee under each voltage of 115% city's voltage (253V), to export the average power approximately equal at 85% city's voltage (187V), make that electric cooker is cooked congee, the effect of Baoshang is with identical under 220V voltage, Mi Shui is in the state of rolling always and can overflow again.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. detection control circuit that is used for electric cooker comprises it is characterized in that the relay of connecting and disconnecting of the circuit of the heat-generating disc of power circuit and the described electric cooker of control, also comprises:
Voltage detecting circuit, its input end connects described power circuit, and its output terminal connects control chip; And
Described control chip, its input end connects described voltage detecting circuit, and its output terminal connects described relay; Described control chip is controlled the make-and-break time of described relay according to the measured value of described voltage detecting circuit.
2. detection control circuit according to claim 1 is characterized in that described voltage detecting circuit comprises rectifier, voltage divider and wave filter, described rectifier and the series connection of described voltage divider, and the dividing potential drop part of described voltage divider is in parallel with described wave filter.
3. detection control circuit according to claim 2 is characterized in that, described rectifier is a diode.
4. detection control circuit according to claim 2, it is characterized in that, described voltage divider constitutes dividing point for first resistance and second resistance of series connection, the tie point between described first resistance and described second resistance, and described second resistance constitutes described dividing potential drop part.
5. detection control circuit according to claim 2 is characterized in that, described wave filter is a capacitor.
6. according to each described detection control circuit in the claim 1 to 5, it is characterized in that, described detection control circuit also comprises temperature sensor, it is arranged at the top of described electric cooker, the input end of described control chip also connects described temperature sensor, and described control chip is also controlled the make-and-break time of described relay according to the measured value of described temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203025237U CN201134020Y (en) | 2007-12-29 | 2007-12-29 | Detection control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203025237U CN201134020Y (en) | 2007-12-29 | 2007-12-29 | Detection control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134020Y true CN201134020Y (en) | 2008-10-15 |
Family
ID=40062287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203025237U Expired - Lifetime CN201134020Y (en) | 2007-12-29 | 2007-12-29 | Detection control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134020Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508075A (en) * | 2011-11-04 | 2012-06-20 | 江苏检验检疫机电产品检测中心 | Intelligent detector of power efficiency of electric cooker |
| CN103610393A (en) * | 2013-08-21 | 2014-03-05 | 浙江绍兴苏泊尔生活电器有限公司 | Method for automatically adjusting power of soybean milk machine |
| CN104007775A (en) * | 2013-02-25 | 2014-08-27 | 美的集团股份有限公司 | Electrothermal equipment and voltage detection method |
-
2007
- 2007-12-29 CN CNU2007203025237U patent/CN201134020Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508075A (en) * | 2011-11-04 | 2012-06-20 | 江苏检验检疫机电产品检测中心 | Intelligent detector of power efficiency of electric cooker |
| CN104007775A (en) * | 2013-02-25 | 2014-08-27 | 美的集团股份有限公司 | Electrothermal equipment and voltage detection method |
| CN103610393A (en) * | 2013-08-21 | 2014-03-05 | 浙江绍兴苏泊尔生活电器有限公司 | Method for automatically adjusting power of soybean milk machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: GREE ELECTRIC APPLIANCES (ZHONGSHAN) SMALL HOUSEHOLD APPLIANCES MANUFACTURING Co.,Ltd. Assignor: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Contract record no.: 2011440001014 Denomination of utility model: Fire detection control circuit for microwave oven Granted publication date: 20081015 License type: Exclusive License Record date: 20111021 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081015 |