CN102525254A - IH (Indirect Heating) electric rice cooker with power failure detection - Google Patents
IH (Indirect Heating) electric rice cooker with power failure detection Download PDFInfo
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- CN102525254A CN102525254A CN2012100152433A CN201210015243A CN102525254A CN 102525254 A CN102525254 A CN 102525254A CN 2012100152433 A CN2012100152433 A CN 2012100152433A CN 201210015243 A CN201210015243 A CN 201210015243A CN 102525254 A CN102525254 A CN 102525254A
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Abstract
An IH (Indirect Heating) electric rice cooker with power failure detection comprises a pot body, a pot cover, an inner pot arranged in the pot body and used for containing food materials, an electromagnetic heating device installed in pot body and used for heating the inner pot, and a control circuit of the electromagnetic heating device, wherein the control circuit comprises a driving chip which is connected with a mains supply and used for providing voltage for the electromagnetic heating device, and internally provided with an input/output end with a clamping diode, the clamping diode comprises a first diode connected with a VDD (Virtual Device Driver) port of the driving chip and a second diode connected with a VSS (virtual switching system) port of the driving chip, the positive end of the first diode is connected with the negative end of the second diode, the positive end of the first diode is taken as an input/output end, the negative end of the first diode is connected with the VDD port, the positive end of the second diode is connected with the VSS port, and the input/output end with the clamping diode is connected with an acquisition circuit capable of reading the electrical level value of the input/output end. The IH electric rice cooker has the advantages of capability of judging whether the power is in failure or not.
Description
Technical field
The present invention relates to a kind of IH electric cooker.
Technical background
Present IH electric cooker requires to do detection of power loss.So-called power down refers to the situation of no civil power to the electric cooker power supply.At present, detection of power loss generally is to take directly to detect line voltage, and judging whether does not have civil power, does corresponding power down process again.Judge whether that through direct detection line voltage there is following shortcoming in power down: 1, Direct Sampling line voltage, thus can't carry out isolation, bring potential safety hazard.2, can there be the energy storage original paper usually on the circuit of detection civil power, like electric capacity, testing circuit commonly used as shown in Figure 1.Will certainly cause line voltage and sampled voltage and asynchronous disappearance or synchronized generation like this, cause causing error in judgement, lose the energy content of battery of testing circuit whether power down occurring or whether having powered on.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the invention provides a kind of IH electric cooker with detection of power loss that can judge whether power down rapidly.
IH electric cooker with detection of power loss; Comprise a pot body, pot cover, place in pot body with the interior pot that holds food materials, be installed in pot body electromagnetic heater of pot and the control circuit of electromagnetic heater in the heating, control circuit comprises the chip for driving that is electrically connected and provides to electromagnetic heater voltage with the city
The I/O end that has the band clamp diode in the chip for driving; Clamp diode comprise first diode that is connected with the vdd terminal mouth of chip for driving and second diode that is connected with the VSS port of chip for driving; The negative end of the forward end of first diode and second diode be connected and the forward end of first diode as described I/O end; The negative end of first diode is connected with the vdd terminal mouth, and the forward end of second diode is connected with the VSS port;
It is characterized in that: the I/O end of this band clamp diode is connected with the Acquisition Circuit of the level value that can read this I/O end.
Further, described Acquisition Circuit is for being connected to the master chip that chip for driving provides the heating control information with chip for driving, and master chip is battery-powered; One of them input of master chip reads the level value of the I/O end of this band clamp diode.
Technical conceive of the present invention is: when the civil power input is arranged in the chip for driving; The I/O end of band clamp diode can be followed the waveform transformation of civil power and exported VSS to the level between the VDD; And when not having the civil power input in the chip for driving, when being power down, being with the output voltage of the I/O end of clamp diode to remain VSS.Can learn whether power down of chip for driving as long as read the magnitude of voltage of I/O end of band clamp diode.The present invention directly reads in the chip for driving magnitude of voltage of the I/O end of band clamp diode through master chip, thereby judges whether power down of electric cooker.
The invention has the beneficial effects as follows: the present invention need not external detection line, can make judgement more rapidly, and the energy-conservation energy reduces cost; The present invention's Direct Sampling civil power not in addition, security is good.
Description of drawings
Fig. 1 is existing power-fail detection circuit figure.
Fig. 2 is the circuit diagram of the I/O end of band clamp diode.
Fig. 3 is a circuit connection diagram of the present invention.
The specific embodiment
With reference to accompanying drawing, further specify the present invention:
IH electric cooker with detection of power loss; Comprise a pot body, pot cover, place in pot body with the interior pot that holds food materials, be installed in pot body electromagnetic heater of pot and the control circuit of electromagnetic heater in the heating, control circuit comprises the chip for driving that is electrically connected and provides to electromagnetic heater voltage with the city;
The I/O end P1.2/T0/ED2 that has the band clamp diode in the chip for driving; Clamp diode comprise first diode D1 that is connected with the vdd terminal mouth of chip for driving and the second diode D2 that is connected with the VSS port of chip for driving; The negative end of the forward end of the first diode D1 and the second diode D2 be connected and the forward end of the first diode D1 as described I/O end; The negative end of the first diode D1 is connected with the vdd terminal mouth, and the forward end of the second diode D2 is connected with the VSS port;
The I/O end P1.2/T0/ED2 of this band clamp diode is connected with the Acquisition Circuit of the level value that can read this I/O end.
Usually chip for driving all can have the I/O end of one or more band clamp diode.Clamp diode is commonly used to protect other chips that are connected with chip for driving to be without prejudice.When input/output voltage is higher than the operating voltage VDD of chip, the first diode D1 conducting, thus the voltage of I/O end is changed to VDD.When input/output voltage is lower than ground voltage VSS, the second diode D2 conducting, thus the voltage of I/O end is changed to VSS.That is to say to have the voltage that the I/O end of clamp diode inputed or outputed and remain between VSS and the VDD, be in the operating voltage of chip that the protection chip can not damage because of input/output voltage is too high.
Described Acquisition Circuit is for being connected to the master chip that chip for driving provides the heating control information with chip for driving, and master chip is battery-powered; One of them input P1.1/ED1 of master chip reads the level value of the I/O end of this band clamp diode.Adopt master chip to be connected with chip for driving, one of them input of master chip reads the output level value of chip for driving, need not to set up peripheral testing circuit, and detection speed is fast, and cost is low.
Technical conceive of the present invention is: when the civil power input is arranged in the chip for driving; The I/O end P1.2/T0/ED2 of band clamp diode can follow the waveform transformation of civil power and export VSS to the level between the VDD; And when not having the civil power input in the chip for driving, when being power down, being with the output voltage of the I/O end P1.2/T0/ED2 of clamp diode to remain VSS.Can learn whether power down of chip for driving as long as read the magnitude of voltage of I/O end P1.2/T0/ED2 of band clamp diode.The present invention directly reads in the chip for driving magnitude of voltage of the I/O end P1.2/T0/ED2 of band clamp diode through master chip, thereby judges whether power down of electric cooker.
The invention has the beneficial effects as follows: the present invention need not external detection line, can make judgement more rapidly, and the energy-conservation energy reduces cost; The present invention's Direct Sampling civil power not in addition, security is good.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Protection scope of the present invention should not be regarded as and only limit to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (2)
1. the IH electric cooker that has detection of power loss; Comprise a pot body, pot cover, place in pot body with the interior pot that holds food materials, be installed in pot body electromagnetic heater of pot and the control circuit of electromagnetic heater in the heating, control circuit comprises the chip for driving that is electrically connected and provides to electromagnetic heater voltage with the city
The I/O end that has the band clamp diode in the chip for driving; Clamp diode comprise first diode that is connected with the vdd terminal mouth of chip for driving and second diode that is connected with the VSS port of chip for driving; The negative end of the forward end of first diode and second diode be connected and the forward end of first diode as described I/O end; The negative end of first diode is connected with the vdd terminal mouth, and the forward end of second diode is connected with the VSS port;
It is characterized in that: the I/O end of this band clamp diode is connected with the Acquisition Circuit of the level value that can read this I/O end.
2. the IH electric cooker with detection of power loss as claimed in claim 1 is characterized in that: described Acquisition Circuit is for being connected to the master chip that chip for driving provides the heating control information with chip for driving, and master chip is battery-powered; One of them input of master chip reads the level value of the I/O end of this band clamp diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015243.3A CN102525254B (en) | 2012-01-18 | 2012-01-18 | IH (Indirect Heating) electric rice cooker with power failure detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015243.3A CN102525254B (en) | 2012-01-18 | 2012-01-18 | IH (Indirect Heating) electric rice cooker with power failure detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102525254A true CN102525254A (en) | 2012-07-04 |
| CN102525254B CN102525254B (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210015243.3A Active CN102525254B (en) | 2012-01-18 | 2012-01-18 | IH (Indirect Heating) electric rice cooker with power failure detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107397421A (en) * | 2016-05-18 | 2017-11-28 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance and its startup control method |
| CN111281159A (en) * | 2018-12-07 | 2020-06-16 | 浙江苏泊尔家电制造有限公司 | Cooking appliance control method and cooking appliance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2250617Y (en) * | 1995-12-06 | 1997-03-26 | 中国人民解放军电子工程学院电子设备厂 | Micro computer fuzzy control electric cooker |
| CN2842966Y (en) * | 2005-09-20 | 2006-11-29 | 广州擎天实业有限公司 | Electro magnetic rice-cooker controller |
| US20080043495A1 (en) * | 2006-08-16 | 2008-02-21 | Aaron Jungreis | Clamp diode reset in a power converter |
| CN201101398Y (en) * | 2007-09-29 | 2008-08-20 | 佛山市顺德区瑞德电子实业有限公司 | Electric cooker controller with memory function |
| CN102240180A (en) * | 2011-07-05 | 2011-11-16 | 佛山市顺德区美的电热电器制造有限公司 | Circuit board for IH (Indirect Heating) rice cooker |
-
2012
- 2012-01-18 CN CN201210015243.3A patent/CN102525254B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2250617Y (en) * | 1995-12-06 | 1997-03-26 | 中国人民解放军电子工程学院电子设备厂 | Micro computer fuzzy control electric cooker |
| CN2842966Y (en) * | 2005-09-20 | 2006-11-29 | 广州擎天实业有限公司 | Electro magnetic rice-cooker controller |
| US20080043495A1 (en) * | 2006-08-16 | 2008-02-21 | Aaron Jungreis | Clamp diode reset in a power converter |
| CN201101398Y (en) * | 2007-09-29 | 2008-08-20 | 佛山市顺德区瑞德电子实业有限公司 | Electric cooker controller with memory function |
| CN102240180A (en) * | 2011-07-05 | 2011-11-16 | 佛山市顺德区美的电热电器制造有限公司 | Circuit board for IH (Indirect Heating) rice cooker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107397421A (en) * | 2016-05-18 | 2017-11-28 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance and its startup control method |
| CN111281159A (en) * | 2018-12-07 | 2020-06-16 | 浙江苏泊尔家电制造有限公司 | Cooking appliance control method and cooking appliance |
| CN111281159B (en) * | 2018-12-07 | 2022-11-22 | 浙江苏泊尔家电制造有限公司 | Cooking appliance control method and cooking appliance |
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| Publication number | Publication date |
|---|---|
| CN102525254B (en) | 2014-08-13 |
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