CN101953626A - Rice cooker - Google Patents
Rice cooker Download PDFInfo
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- CN101953626A CN101953626A CN2009102078989A CN200910207898A CN101953626A CN 101953626 A CN101953626 A CN 101953626A CN 2009102078989 A CN2009102078989 A CN 2009102078989A CN 200910207898 A CN200910207898 A CN 200910207898A CN 101953626 A CN101953626 A CN 101953626A
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Abstract
The invention provides a rice cooker which can enlarge permitted changing range of the supply voltage, and can reliably determined whether the cooker is existed or not in an area with unstable supply voltage. The rice cooker comprises a converter circuit consisting of heating coils, a resonant capacitor and a large power element; a current detecting device which is used for detecting the AC current flowing into a diode bridge rectifier circuit and outputting the voltage which is directly proportional to the detected current; a converter voltage detecting device which is used for detecting the voltage in a converter circuit and outputting the voltage which is directly proportional to the detected voltage; a supply voltage detecting circuit which is used for detecting the mains supply voltage; and a cooker detecting device which is used for judging whether the cooker is installed on the regulated position when the output voltage of the converter voltage detecting device is higher than the output voltage of the current detecting device in a regulated threshold voltage. Under the condition that the detecting voltage of the supply voltage detecting circuit is higher than the standard voltage, the threshold voltage is set to be higher than the preset threshold voltage.
Description
Technical field
The present invention relates to a kind of electric cooker, more particularly, relate to and a kind ofly be used in general family expenses or professional whether be installed to the stew device of pot host cavity of body of electric cooker with pot in the electric cooker, that Mi Heshui is put in detection in advance before the operation beginning of cooking.
Background technology
Existing frequency conversion type electric cooker generally is provided with respectively the testing circuit that input current and frequency converter voltage are detected, and comparing with each testing circuit with detection electric current and the corresponding circuit output of detection voltage, under the situation of output greater than the output of input current testing circuit of frequency converter voltage testing circuit, then be judged to be pot and be not installed in the assigned position (the pot host cavity in electric cooker pot body), an example wherein can be opened flat 2-95315 with reference to the open communique spy of Japan Patent.Existing electric cooker in this list of references 1 has been shown among Fig. 4.As shown in Figure 4, this electric cooker is by constituting with lower member: heater coil 6, resonating capacitor 7, the frequency converter, current sensing means 2, frequency converter voltage checkout gear 3, pot checkout gear 9 and the transducer control circuit 10 that are made of high-power components 8.
But, adopt the words of the formation of above-mentioned existing electric cooker, because will be judged to be pot in the output (voltage) of frequency converter voltage testing circuit during greater than the output (voltage) of input current testing circuit does not install, therefore in the mains voltage change, particularly under the situation that mains voltage uprises, the output of frequency converter voltage will become and be higher than the output of input current.For instance, if the detection electric current of input current testing circuit is I when mains voltage is normal voltage
1, the detection voltage of frequency converter voltage testing circuit is V
1, and the detection electric current of input current testing circuit is I when mains voltage is higher than normal voltage
2, the detection voltage of frequency converter voltage testing circuit is V
2The time, I then
1=I
2, and V
1＜V
2Like this, even under the situation that pot is arranged, might be judged as does not have pot yet.In general design, though when setting the decision level of pot checkout gear, also can take into account voltage change to a certain degree, but,, then can produce the problem that erroneous judgement takes place pot checkout gear if voltage has exceeded the scope of anticipation at short notice in the unsettled area of mains supply.
Summary of the invention
The present invention is intended to solve the above-mentioned problems in the prior art, its purpose is to provide a kind of permission mobility scale that can enlarge supply voltage, even also can carry out the electric cooker that pot has or not judgements (judging cooking before whether pot is installed to electric cooker and stews in pot host cavity in the body) reliably in the unsettled area of supply voltage.
In order to solve the above-mentioned problems in the prior art, electric cooker of the present invention comprises: detect the alternating current that flows through in the diode bridge rectifier circuit, and the current sensing means of the voltage that is directly proportional with the detection electric current of output; Detect voltage in the converter circuit, and the frequency converter voltage checkout gear of the voltage that is directly proportional with detection voltage of output; Detect the voltage detection circuit of mains voltage; With when the output voltage of frequency converter voltage checkout gear exceeds the threshold voltage of regulation than the output voltage of current sensing means, judge that pot is not installed to the pot checkout gear on the assigned position.Under the high situation of the detection voltage ratio normal voltage of voltage detection circuit, threshold voltage is configured to be higher than pre-set threshold voltage.
Like this, the decision level of pot checkout gear can change according to the change of supply voltage, the permission mobility scale of supply voltage can enlarge, have or not judgement even also can carry out pot reliably, judge before cooking whether pot installs in the pot host cavity in electric cooker pot body in the unsettled area of supply voltage.
The technique effect that the present invention produces is as follows.Adopt after the electric cooker described in the present invention, can enlarge the permission mobility scale of supply voltage, have or not judgement, judge that cooking before pot whether installing to electric cooker stews in the host cavity in the body even also can carry out pot reliably in the unsettled area of supply voltage.
Description of drawings
Fig. 1 is the circuit block diagram of the electric cooker in the embodiment of the invention 1,
Fig. 2 has or not the schematic diagram of judgement for carrying out pot in the embodiment of the invention 1,
Fig. 3 is the another kind of circuit block diagram that has used frequency converter in the embodiment of the invention 1,
Fig. 4 is the circuit block diagram of existing electric cooker.
In the above-mentioned accompanying drawing, 1 is mains supply, and 2 is current sensing means, 2a is a power pack, and 2b is a current-voltage conversion circuit, and 3 is diode bridge rectifier circuit, 4 is smmothing capacitor, and 5 is the frequency converter voltage checkout gear, and 6 is heater coil, 7 is resonating capacitor, and 8 is high-power components, and 9 is the pot checkout gear, 9a is a comparison circuit, and 9b has or not decision circuit for pot, and 10 is transducer control circuit, 11 is the high-power components drive circuit, and 12 is voltage detection circuit, 13 pots for the usefulness of cooking.
The specific embodiment
(embodiment 1)
Fig. 1 is the circuit block diagram of the electric cooker structure among expression the present invention the 1st embodiment.Among Fig. 1, mains supply 1 is transformed into DC voltage by diode bridge rectifier circuit 3, heater coil 6, resonating capacitor 7 and high-power components 8 constitute converter circuit, this converter circuit produces RF power, RF power is supplied on the pot for cooking rice 13 that is arranged on heater coil 6 tops with the form of high frequency magnetic field, make in the pot for cooking rice 13 and produce vortex flow, the Jiao Erre that produces by vortex flow heats pot for cooking rice 13 again.
In addition, power pack 2a and current-voltage conversion circuit 2b have constituted current sensing means 2, current sensing means 2 produce with flow into diode bridge rectifier circuit 3 in the voltage that is directly proportional of alternating current flow valuve.In addition, frequency converter voltage checkout gear 5 is used for detecting the voltage that converter circuit takes place, and what detect in Fig. 1 is the voltage that is added on the high-power components 8.In addition, voltage detection circuit 12 is used to detect the amplitude of fluctuation of mains voltage with respect to normal voltage.
The output of current sensing means 2 and frequency converter voltage checkout gear 5 compares in the comparison circuit 9a of pot checkout gear 9, and its comparative result outputs to pot and has or not among the decision circuit 9b.Have or not among the decision circuit 9b at pot, calculate compensating value according to the output of voltage detection circuit 12, under the big situation of the value after the output that frequency converter voltage is detected adds compensating value than the output of current sensing means, being judged to be does not have pot.
The decision method of pot checkout gear has been shown among Fig. 2.The pot checkout gear configures compensating value A according to the output of supply voltage test section earlier, again the output of input current detecting device is added that the value after the compensating value and the output of frequency converter voltage checkout gear compare, rise under the situation that surpasses nothing pot decision level at frequency converter voltage, then being judged to be does not have pot.
If the compensating value during normal voltage is A1, the compensating value when voltage is excessive is A2, and then the relation of A1 and A2 is set at A1＜A2.
As shown in Figure 2, if the input current detected value during normal voltage is Iin1, the detected value of frequency converter voltage is Vin1, and then the operating point is on the position shown in 31.Afterwards, when the supply voltage rising, when being above standard voltage, because frequency converter voltage rises, the operating point will be transferred to 32.At this moment operating point is on the position of Iin1, Vin2.Input current is not being carried out under the situation of revisal, do not having the pot decision level, so even the state of pot is arranged, can be judged to be does not mistakenly have pot yet because operating point 32 has arrived.
In the present embodiment, earlier set compensating value according to the output of voltage detection circuit, and the compensating value A2 when on Iin1, adding excessive voltage, calculate Iin2, again Iin2 and Vin2 are compared.
Add after the compensating value, the operating point that the pot testing circuit is judged is 33, do not have sufficient surplus with respect to there being the pot decision level, thereby can enlarge the permission excursion of supply voltage, pot has or not judgement even also can carry out reliably in the unsettled area of supply voltage.
In addition, though employing in the present embodiment is the method for input current being carried out revisal, also can adopt the mode that frequency converter voltage is carried out revisal or nothing pot decision level is carried out revisal.Obviously, adopt these modes also can reach same effect.
Fig. 3 is applied in example in the double hose frequency converter for the present invention.
In Fig. 3, the voltage rising part that produces because of the work of frequency converter is used as the detection voltage of frequency converter voltage, adopts such method also can reach same effect.
In sum, electric cooker among the present invention can enlarge the permission mobility scale of supply voltage, can carry out also in the unsettled area of supply voltage reliably that pot has or not judgement, therefore can be widely used in the electric cooker that uses in the stable inadequately area of supply voltage etc.
Claims (1)
1. electric cooker is characterized in that comprising:
Mains supply is transformed into the diode bridge rectifier circuit of DC voltage;
The heater coil of high frequency magnetic field is provided to pot;
The converter circuit that constitutes by described heater coil, resonating capacitor and high-power components;
To the alternating current that flows in the described diode bridge rectifier circuit detect, and the current sensing means of the voltage that is directly proportional with the detection electric current of output;
Detect voltage in the described converter circuit, and the frequency converter voltage checkout gear of the voltage that is directly proportional with detection voltage of output;
Detect the voltage detection circuit of mains voltage; With
When the output voltage of described frequency converter voltage checkout gear surpasses the output voltage of described current sensing means and reaches the threshold voltage of regulation when above, judge that pot is not arranged on the pot checkout gear on the assigned position,
Under the high situation of the detection voltage ratio normal voltage of described voltage detection circuit, described threshold voltage is configured to be higher than pre-set threshold voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009165643A JP2011023163A (en) | 2009-07-14 | 2009-07-14 | Rice cooker |
| JP2009-165643 | 2009-07-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101953626A true CN101953626A (en) | 2011-01-26 |
| CN101953626B CN101953626B (en) | 2014-04-09 |
Family
ID=43481406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910207898.9A Active CN101953626B (en) | 2009-07-14 | 2009-11-06 | Rice cooker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011023163A (en) |
| CN (1) | CN101953626B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105103652A (en) * | 2012-12-11 | 2015-11-25 | 阿塞里克股份有限公司 | An induction heating cooktop |
| CN105230121A (en) * | 2013-03-11 | 2016-01-06 | 伊莱克斯家用电器股份公司 | Detect the method for the cooker on induced cooking utensils, induced cooking utensils and cooking apparatus |
| CN105230120A (en) * | 2012-12-11 | 2016-01-06 | 阿塞里克股份有限公司 | Induction heating cooktop surface |
| CN108633117A (en) * | 2017-03-23 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance |
| CN109028181A (en) * | 2018-07-10 | 2018-12-18 | 孙宏斌 | A kind of single tube electromagnetic oven circuit and single tube electromagnetic oven control method |
| CN109965670A (en) * | 2017-12-28 | 2019-07-05 | 佛山市顺德区美的电热电器制造有限公司 | The detection method and detection system of cooking apparatus, cooking apparatus |
| CN110461193A (en) * | 2017-04-06 | 2019-11-15 | 三菱电机株式会社 | Electromagnetic induction heating cooker |
| CN112333864A (en) * | 2020-10-14 | 2021-02-05 | 中山爱它电器科技有限公司 | Control method and device for induction cooker |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103720342A (en) * | 2013-12-16 | 2014-04-16 | 广西柳州浚业科技有限公司 | Frequency conversion electric heating cup |
| TR201721881A2 (en) * | 2017-12-26 | 2019-07-22 | Arcelik As | A METAL DETECTION SYSTEM WITH COIL FEEDING WITH A HIGH FREQUENCY GENERATOR |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0295315A (en) * | 1988-09-30 | 1990-04-06 | Matsushita Electric Ind Co Ltd | Rice cooker |
| CN1163736A (en) * | 1996-03-26 | 1997-11-05 | 三菱电机株式会社 | Electric rice pot |
| JPH1156602A (en) * | 1997-08-22 | 1999-03-02 | Matsushita Electric Ind Co Ltd | Rice cooker |
| CN201021818Y (en) * | 2007-03-01 | 2008-02-13 | 东莞市前锋电子有限公司 | Circuit device for electromagnetic furnace detection boiler |
-
2009
- 2009-07-14 JP JP2009165643A patent/JP2011023163A/en active Pending
- 2009-11-06 CN CN200910207898.9A patent/CN101953626B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0295315A (en) * | 1988-09-30 | 1990-04-06 | Matsushita Electric Ind Co Ltd | Rice cooker |
| CN1163736A (en) * | 1996-03-26 | 1997-11-05 | 三菱电机株式会社 | Electric rice pot |
| JPH1156602A (en) * | 1997-08-22 | 1999-03-02 | Matsushita Electric Ind Co Ltd | Rice cooker |
| CN201021818Y (en) * | 2007-03-01 | 2008-02-13 | 东莞市前锋电子有限公司 | Circuit device for electromagnetic furnace detection boiler |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105230120B (en) * | 2012-12-11 | 2017-05-03 | 阿塞里克股份有限公司 | An induction heating cooktop |
| CN105103652A (en) * | 2012-12-11 | 2015-11-25 | 阿塞里克股份有限公司 | An induction heating cooktop |
| CN105230120A (en) * | 2012-12-11 | 2016-01-06 | 阿塞里克股份有限公司 | Induction heating cooktop surface |
| CN105103652B (en) * | 2012-12-11 | 2017-03-22 | 阿塞里克股份有限公司 | An induction heating cooktop |
| US10045402B2 (en) | 2013-03-11 | 2018-08-07 | Electrolux Appliances Aktiebolag | Method of detecting cookware on an induction hob, induction hob and cooking appliance |
| CN105230121B (en) * | 2013-03-11 | 2018-01-09 | 伊莱克斯家用电器股份公司 | Detect method, induced cooking utensils and the cooking apparatus of the cooker on induced cooking utensils |
| CN105230121A (en) * | 2013-03-11 | 2016-01-06 | 伊莱克斯家用电器股份公司 | Detect the method for the cooker on induced cooking utensils, induced cooking utensils and cooking apparatus |
| CN108633117A (en) * | 2017-03-23 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | Detection is by the circuit of heating device and electromagnetic heating apparatus and household electrical appliance |
| CN110461193A (en) * | 2017-04-06 | 2019-11-15 | 三菱电机株式会社 | Electromagnetic induction heating cooker |
| CN109965670A (en) * | 2017-12-28 | 2019-07-05 | 佛山市顺德区美的电热电器制造有限公司 | The detection method and detection system of cooking apparatus, cooking apparatus |
| CN109965670B (en) * | 2017-12-28 | 2021-08-31 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance, detection method and detection system of cooking appliance |
| CN109028181A (en) * | 2018-07-10 | 2018-12-18 | 孙宏斌 | A kind of single tube electromagnetic oven circuit and single tube electromagnetic oven control method |
| CN112333864A (en) * | 2020-10-14 | 2021-02-05 | 中山爱它电器科技有限公司 | Control method and device for induction cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101953626B (en) | 2014-04-09 |
| JP2011023163A (en) | 2011-02-03 |
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