CN203658449U - Zero-cross detection circuit and electric pressure cooker with application of same - Google Patents
Zero-cross detection circuit and electric pressure cooker with application of same Download PDFInfo
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- CN203658449U CN203658449U CN201320766291.6U CN201320766291U CN203658449U CN 203658449 U CN203658449 U CN 203658449U CN 201320766291 U CN201320766291 U CN 201320766291U CN 203658449 U CN203658449 U CN 203658449U
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 230000011664 signaling Effects 0.000 claims description 33
- 238000010411 cooking Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a zero-cross detection circuit and an electric pressure cooker with application of the same. The zero-cross detection circuit comprises a signal detection circuit and a signal conversion circuit. An input end of the signal detection circuit is connected to an external power supply, and output end of the signal detection circuit is connected to an input end of the signal conversion circuit; an input end of the signal conversion circuit is connected with an output end of the signal detection circuit; and an output end of the signal conversion circuit outputs a square wave signal, and a frequency of the square wave signal is the same as that of the external power supply. The zero-cross detection circuit of the utility model adopts fewer electronic components, so that the zero-cross detection circuit is easy to implement, low in cost, and high in reliability.
Description
Technical field
The utility model relates to electric pressure cooking saucepan technical field, in particular to a kind of zero cross detection circuit and apply its electric pressure cooking saucepan.
Background technology
The control system of the household electrical appliance such as existing electromagnetic oven adopts civil power zero cross detection circuit conventionally, and so-called civil power zero passage detection refers in mains-supplied system, when waveform is from just half circumferentially negative half period conversion and during through zero-bit, the detection that system is made.It can be used as on-off circuit or frequency detecting.In prior art, roughly there are two schemes, the one, transformer isolation, the 2nd, light-coupled isolation.
Utility model content
On the one hand, for the typical zero passage scheme that provides a kind of insulating power supply and non-insulating power supply to select, the purpose of this utility model is to provide a kind of zero cross detection circuit; On the other hand, for a kind of electric pressure cooking saucepan of applying zero cross detection circuit is provided, improve the availability of electric pressure cooking saucepan, the purpose of this utility model is to provide a kind of electric pressure cooking saucepan of applying this zero cross detection circuit.
In order to reach the purpose of this utility model, the utility model is realized by the following technical solutions:
A kind of zero cross detection circuit, it comprises signal deteching circuit and signaling conversion circuit, wherein:
Signal deteching circuit, its input end is connected to external power source, and its output terminal is connected to the input end of signaling conversion circuit;
Signaling conversion circuit, its input end is connected to the output terminal of signal deteching circuit, the square wave zero-signal that its output terminal output frequency is identical with described external power source frequency.
In a kind of embodiment, described signal deteching circuit comprises the first current-limiting resistance R1, the second current-limiting resistance R2 and the first triode U1, the input end of described the first current-limiting resistance R1 is connected to external power source, its output terminal is connected with the input end of the second current-limiting resistance R2 and the base stage of the first triode U1 respectively, the output head grounding of described the second current-limiting resistance R2, the collector of described the first triode U1 is connected to signaling conversion circuit, and its emitter is connected with ground;
Described signaling conversion circuit comprises the 3rd current-limiting resistance R3, and the input end of described the 3rd current-limiting resistance R3 is connected to high level VDD, and its output terminal is connected to the collector of the first triode U1, in order to the output frequency square-wave signal identical with described external power source frequency.
In another kind of embodiment, described signal deteching circuit comprises the 4th current-limiting resistance R4, the 5th current-limiting resistance R5 and the second triode U2, the input end of described the 4th current-limiting resistance R4 is connected to external power source, its output terminal is connected with the input end of the 5th current-limiting resistance R5 and the base stage of the second triode U2 respectively, the output terminal of described the 5th current-limiting resistance R5 connects high level VDD, the emitter of described the second triode U2 connects high level VDD, and its collector is connected to signaling conversion circuit;
Described signaling conversion circuit comprises the 6th current-limiting resistance R6, the input end grounding of described the 6th current-limiting resistance R6, and its output terminal is connected to the collector of the second triode U2, in order to the square-wave signal of output frequency and described external power source same frequency.
In addition, in other embodiments, described signal deteching circuit comprises the 7th current-limiting resistance R7, the first diode D1 and optocoupler U3, the input end of described the 7th current-limiting resistance R7 is connected to external power source, the anodic bonding of its output terminal and the first diode D1, the negative electrode of described the first diode D1 is connected to the first input end of optocoupler U3, and the second input end of optocoupler U3 and the first output terminal be ground connection respectively, and its second output terminal is connected to signaling conversion circuit;
Described signaling conversion circuit comprises the 8th current-limiting resistance R8, the input termination high level VDD of described the 8th current-limiting resistance R8, and its output terminal is connected to the second output terminal of optocoupler U3, in order to the output frequency square-wave signal identical with described external power source frequency.
The utility model embodiment also provides a kind of electric pressure cooking saucepan, and it comprises the zero cross detection circuit as described in claim as arbitrary in claim 1-4, and described zero cross detection circuit comprises signal deteching circuit and signaling conversion circuit, wherein:
Signal deteching circuit, its input end is connected to external power source, and its output terminal is connected to the input end of signaling conversion circuit;
Signaling conversion circuit, its input end is connected to the output terminal of signal deteching circuit, the square-wave signal that its output terminal output frequency is identical with described external power source frequency.
Can find out by above-mentioned the technical solution of the utility model, the zero cross detection circuit that the utility model provides, owing to having adopted less electronic devices and components, be easy to realize, and cost is lower, and reliability is higher.
Accompanying drawing explanation
Fig. 1 is the zero cross detection circuit modular structure schematic diagram that the utility model embodiment provides;
Fig. 2 is the zero cross detection circuit structural representation that the utility model embodiment 1 provides;
Fig. 3 is the zero cross detection circuit structural representation that the utility model embodiment 2 provides;
Fig. 4 is the zero cross detection circuit structural representation that the utility model embodiment 3 provides.
Realization, functional characteristics and the excellent effect of the utility model object, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme described in the utility model is described in further detail, so that those skilled in the art can better understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.
With reference to figure 1, a kind of zero cross detection circuit that the utility model provides, it comprises signal deteching circuit 10 and signaling conversion circuit 20, wherein:
Signal deteching circuit 10, its input end is connected to external power source, and its output terminal is connected to the input end of signaling conversion circuit 20; Wherein, described external power source can be the alternating current input power supplying of 220V;
Wherein, described zero cross signal is a series of square-wave signal, and its frequency is for example, with the frequency of described external power source (AC power) consistent.
For example, as shown in Figure 2, in embodiment 1 of the present utility model, described signal deteching circuit 10 comprises the first current-limiting resistance R1, the second current-limiting resistance R2 and the first triode U1, the input end of described the first current-limiting resistance R1 is connected to external power source, its output terminal is connected with the input end of the second current-limiting resistance R2 and the base stage of the first triode U1 respectively, the output head grounding of described the second current-limiting resistance R2, the collector of described the first triode U1 is connected to signaling conversion circuit 20, and its emitter is connected with ground;
Described signaling conversion circuit 20 comprises the 3rd current-limiting resistance R3, the input end of described the 3rd current-limiting resistance R3 is connected to high level VDD, its output terminal is connected to the collector of the first triode U1, in order to the output frequency square-wave signal identical with described external power source frequency.
As shown in Figure 3, in embodiment 2 of the present utility model, described signal deteching circuit 10 comprises the 4th current-limiting resistance R4, the 5th current-limiting resistance R5 and the second triode U2, the input end of described the 4th current-limiting resistance R4 is connected to external power source, its output terminal is connected with the input end of the 5th current-limiting resistance R5 and the base stage of the second triode U2 respectively, the output terminal of described the 5th current-limiting resistance R5 connects high level VDD, the emitter of described the second triode U2 connects high level VDD, and its collector is connected to signaling conversion circuit 20;
Described signaling conversion circuit 20 comprises the 6th current-limiting resistance R6, the input end grounding of described the 6th current-limiting resistance R6, and its output terminal is connected to the collector of the second triode U2, in order to the output frequency square-wave signal identical with described external power source frequency.
As shown in Figure 4, in embodiment 3 of the present utility model, described signal deteching circuit 10 comprises the 7th current-limiting resistance R7, the first diode D1 and optocoupler U3, the input end of described the 7th current-limiting resistance R7 is connected to external power source, the anodic bonding of its output terminal and the first diode D1, the negative electrode of described the first diode D1 is connected to the first input end of optocoupler U3, and the second input end of optocoupler U3 and the first output terminal be ground connection respectively, and its second output terminal is connected to signaling conversion circuit 20;
Described signaling conversion circuit 20 comprises the 8th current-limiting resistance R8, the input termination high level VDD of described the 8th current-limiting resistance R8, and its output terminal is connected to the second output terminal of optocoupler U3, in order to the output frequency square-wave signal identical with described external power source frequency.
In addition, the utility model embodiment also correspondingly provides a kind of electric pressure cooking saucepan, it comprises the zero cross detection circuit as described in claim as arbitrary in claim 1-4, and described zero cross detection circuit comprises signal deteching circuit 10 and signaling conversion circuit 20, wherein:
Signal deteching circuit 10, its input end is connected to external power source, and its output terminal is connected to the input end of signaling conversion circuit 20;
Specific descriptions for described zero cross detection circuit can, with reference to mentioned above, no longer repeat it herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (5)
1. a zero cross detection circuit, is characterized in that, comprises signal deteching circuit and signaling conversion circuit, wherein:
Signal deteching circuit, its input end is connected to external power source, and its output terminal is connected to the input end of signaling conversion circuit;
Signaling conversion circuit, its input end is connected to the output terminal of signal deteching circuit, the square-wave signal that its output terminal output frequency is identical with described external power source frequency.
2. zero cross detection circuit as claimed in claim 1, it is characterized in that, described signal deteching circuit comprises the first current-limiting resistance R1, the second current-limiting resistance R2 and the first triode U1, the input end of described the first current-limiting resistance R1 is connected to external power source, its output terminal is connected with the input end of the second current-limiting resistance R2 and the base stage of the first triode U1 respectively, the output head grounding of described the second current-limiting resistance R2, the collector of described the first triode U1 is connected to signaling conversion circuit, and its emitter is connected with ground;
Described signaling conversion circuit comprises the 3rd current-limiting resistance R3, and the input end of described the 3rd current-limiting resistance R3 is connected to high level VDD, and its output terminal is connected to the collector of the first triode U1, in order to the output frequency square-wave signal identical with described external power source frequency.
3. zero cross detection circuit as claimed in claim 1, it is characterized in that, described signal deteching circuit comprises the 4th current-limiting resistance R4, the 5th current-limiting resistance R5 and the second triode U2, the input end of described the 4th current-limiting resistance R4 is connected to external power source, its output terminal is connected with the input end of the 5th current-limiting resistance R5 and the base stage of the second triode U2 respectively, the output terminal of described the 5th current-limiting resistance R5 connects high level VDD, the emitter of described the second triode U2 connects high level VDD, and its collector is connected to signaling conversion circuit;
Described signaling conversion circuit comprises the 6th current-limiting resistance R6, the input end grounding of described the 6th current-limiting resistance R6, and its output terminal is connected to the collector of the second triode U2, in order to the output frequency square-wave signal identical with described external power source frequency.
4. zero cross detection circuit as claimed in claim 1, it is characterized in that, described signal deteching circuit comprises the 7th current-limiting resistance R7, the first diode D1 and optocoupler U3, the input end of described the 7th current-limiting resistance R7 is connected to external power source, the anodic bonding of its output terminal and the first diode D1, the negative electrode of described the first diode D1 is connected to the first input end of optocoupler U3, and the second input end of optocoupler U3 and the first output terminal be ground connection respectively, and its second output terminal is connected to signaling conversion circuit;
Described signaling conversion circuit comprises the 8th current-limiting resistance R8, the input termination high level VDD of described the 8th current-limiting resistance R8, and its output terminal is connected to the second output terminal of optocoupler U3, in order to the output frequency square-wave signal identical with described external power source frequency.
5. an electric pressure cooking saucepan, is characterized in that, comprises the zero cross detection circuit as described in claim as arbitrary in claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320766291.6U CN203658449U (en) | 2013-11-27 | 2013-11-27 | Zero-cross detection circuit and electric pressure cooker with application of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320766291.6U CN203658449U (en) | 2013-11-27 | 2013-11-27 | Zero-cross detection circuit and electric pressure cooker with application of same |
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| Publication Number | Publication Date |
|---|---|
| CN203658449U true CN203658449U (en) | 2014-06-18 |
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| CN201320766291.6U Expired - Lifetime CN203658449U (en) | 2013-11-27 | 2013-11-27 | Zero-cross detection circuit and electric pressure cooker with application of same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105266598A (en) * | 2014-06-24 | 2016-01-27 | 佛山市顺德区美的电热电器制造有限公司 | Control method for cooking device, and cooking device |
| CN106208672A (en) * | 2015-05-05 | 2016-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Power control circuit and heater |
| CN106841762A (en) * | 2017-02-08 | 2017-06-13 | 广东美的厨房电器制造有限公司 | Zero cross detection circuit and home appliance |
| CN108151769A (en) * | 2017-11-30 | 2018-06-12 | 广东美的厨房电器制造有限公司 | Door of microwave oven detection device and method |
| CN108962677A (en) * | 2018-07-11 | 2018-12-07 | 深圳拓邦股份有限公司 | A kind of means of relay controlling, system and relay |
-
2013
- 2013-11-27 CN CN201320766291.6U patent/CN203658449U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105266598A (en) * | 2014-06-24 | 2016-01-27 | 佛山市顺德区美的电热电器制造有限公司 | Control method for cooking device, and cooking device |
| CN105266598B (en) * | 2014-06-24 | 2018-01-02 | 佛山市顺德区美的电热电器制造有限公司 | The control method and cooker of cooker |
| CN106208672A (en) * | 2015-05-05 | 2016-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Power control circuit and heater |
| CN106208672B (en) * | 2015-05-05 | 2019-07-16 | 佛山市顺德区美的电热电器制造有限公司 | Power control circuit and heating device |
| CN106841762A (en) * | 2017-02-08 | 2017-06-13 | 广东美的厨房电器制造有限公司 | Zero cross detection circuit and home appliance |
| CN108151769A (en) * | 2017-11-30 | 2018-06-12 | 广东美的厨房电器制造有限公司 | Door of microwave oven detection device and method |
| CN108962677A (en) * | 2018-07-11 | 2018-12-07 | 深圳拓邦股份有限公司 | A kind of means of relay controlling, system and relay |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20140618 |
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| CX01 | Expiry of patent term |