CN203133150U - Voltage sampling circuit and electric heater provided therewith - Google Patents
Voltage sampling circuit and electric heater provided therewith Download PDFInfo
- Publication number
- CN203133150U CN203133150U CN 201320110582 CN201320110582U CN203133150U CN 203133150 U CN203133150 U CN 203133150U CN 201320110582 CN201320110582 CN 201320110582 CN 201320110582 U CN201320110582 U CN 201320110582U CN 203133150 U CN203133150 U CN 203133150U
- Authority
- CN
- China
- Prior art keywords
- resistance
- links
- sampling circuit
- voltage
- diode
- Prior art date
- 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
Images
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The utility model discloses a voltage sampling circuit, which comprises a voltage dividing module used for dividing the voltage of an input power supply and connected with the input power supply, a clamping module used for clamping divided voltages within a preset range and connected with the voltage dividing module, and a controller connected with the clamping module. When the controller detects the zero-crossing phenomenon of the input power supply, the delayed-time processing of the controlled is carried out to sample the voltage peak value of the input power supply. Due to the adoption of the voltage sampling circuit, the voltage of the input AC commercial power can be directly sampled, while the number of components is reduced. Therefore, the cost is lowered. The utility model also discloses an electric heater provided with the above voltage sampling circuit.
Description
Technical field
The utility model relates to the small household appliances technical field, particularly a kind of voltage sampling circuit and a kind of electric heater with this voltage sampling circuit.
Background technology
At present, small household appliances such as electric cooker, pressure cooker, slow cooker, frying in shallow oil product such as roasting mechanical, electrical steamer, generally is by the electric main of input being converted to DC voltage, carrying out voltage sample again in order to control cooking process.
In the prior art, a kind of voltage sampling circuit as shown in Figure 1, this voltage sampling circuit comprises resistance R 1 ', R2 ', R3 ' and diode D1 ', D2 ', D3 ', also comprises electrochemical capacitor EC1 and capacitor C 1.Though this voltage sampling circuit can be sampled to the voltage of electric main of input, needed components and parts are more, the cost height.
The utility model content
The purpose of this utility model is intended to solve at least one of above-mentioned technological deficiency.
For this reason, the purpose of this utility model is to propose a kind of voltage sampling circuit cheaply and realizes that direct electric main to input carries out voltage sample.
The utility model has also proposed a kind of electric heater with above-mentioned voltage sampling circuit cheaply.
For achieving the above object, a kind of voltage sampling circuit that the utility model proposes on the one hand comprises: carry out the division module of dividing potential drop to importing power source voltage, described division module links to each other with described input power supply; Voltage after partial is clamped at the clamp module of preset range, and described clamp module links to each other with described division module; And controller, described controller links to each other with described clamp module, the described controller described input power source voltage peak value of delaying time to sample when detecting described input power supply zero passage.
According to the voltage sampling circuit that the utility model proposes, can when detecting input power supply zero passage, import the power source voltage peak value by time-delay with sampling, realize directly to the sampling of input power source voltage.This voltage sampling circuit has reduced components and parts, greatly reduces cost.
Wherein, particularly, described division module comprises: first resistance and second resistance of mutual series connection, has first node between described first resistance and second resistance, one end of described first resistance links to each other with the positive terminal of described input power supply, the other end of described first resistance links to each other with an end of described second resistance, and the other end of described second resistance links to each other with the negative pole end of described input power supply.
Particularly, described clamp module comprises: first diode and second diode of mutual series connection, has Section Point between described first diode and second diode, described Section Point links to each other with described first node, the negative pole end of described first diode links to each other with reference power source, the positive terminal of described first diode links to each other with the negative pole end of described second diode, the positive terminal ground connection of described second diode.
In addition, described voltage sampling circuit also comprises: the 3rd resistance, and an end of described the 3rd resistance links to each other with described Section Point, and the other end of described the 3rd resistance links to each other with described controller.
In the utility model, the voltage sampling circuit that only adopts basic electronic devices and components such as resistance, diode to form has reduced components and parts, has reduced cost, and the reliability height.
The utility model has also proposed a kind of electric heater, comprises above-mentioned voltage sampling circuit.
The aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or the additional aspect of the utility model and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the circuit diagram of a kind of voltage sampling circuit of prior art;
Fig. 2 is the block diagram according to the voltage sampling circuit of an embodiment of the utility model;
Fig. 3 is the circuit diagram according to the voltage sampling circuit of an embodiment of the utility model;
Fig. 4 is the implementation method process flow diagram according to the voltage sampling circuit of an embodiment of the utility model; And
Fig. 5 is the ac commercial power voltage pickup area synoptic diagram according to a specific embodiment of the utility model.
Reference numeral:
Resistance R 1 ', R2 ', R3 ' and diode D1 ', D2 ', D3 ', electrochemical capacitor EC1 and capacitor C 1; Division module 10, clamp module 20 and controller 30, the first resistance R 1 and second resistance R 2, first node a, Section Point b, civil power live wire L and civil power zero line N, the first diode D1 and the second diode D2, the 3rd resistance R 3.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter parts and the setting to specific examples is described.Certainly, they only are example, and purpose does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between the various embodiment that discuss of institute and/or the setting.In addition, various specific technology and examples of material that the utility model provides, but those of ordinary skills can recognize the property of can be applicable to of other technologies and/or the use of other materials.In addition, first feature described below second feature it " on " structure can comprise that first and second features form the embodiment of direct contact, can comprise that also additional features is formed on the embodiment between first and second features, such first and second features may not be direct contacts.
In description of the present utility model, need to prove, unless otherwise prescribed and limit, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can link to each other indirectly by intermediary, for the ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be.
With reference to following description and accompanying drawing, with these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, some specific implementations among the embodiment of the present utility model are specifically disclosed, represent to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and interior all changes, modification and the equivalent of intension scope that falls into institute's additional claims.
The voltage sample resistance that proposes according to the utility model embodiment and the electric heater with it are described with reference to the accompanying drawings.
As shown in Figure 2, the voltage sampling circuit of an embodiment proposition of the utility model comprises division module 10, clamp module 20 and controller 30.
Wherein, division module 10 links to each other with input power supply (being electric main), and 10 pairs of inputs of division module power source voltage is carried out dividing potential drop.Clamp module 20 links to each other with division module 10, is used for voltage after partial is clamped in the preset range, and namely speech utilizes clamp module 20 that voltage after partial is clamped at certain voltage range, so that controller is identified sampling.Controller 30 links to each other with clamp module 20, the controller 30 input power source voltage peak value of delaying time to sample when detecting input power supply zero passage.
Particularly, in an embodiment of the present utility model, as shown in Figure 3, division module 10 comprises first resistance R 1 and second resistance R 2 of mutual series connection.Wherein, has first node a between first resistance R 1 and second resistance R 2, one end of first resistance R 1 is that civil power live wire L links to each other with the positive terminal of input power supply, the other end of first resistance R 1 links to each other with an end of second resistance R 2, and the other end of second resistance R 2 is that civil power zero line N links to each other with the negative pole end of input power supply.
As shown in Figure 3, in the present embodiment, clamp module 20 comprises the first diode D1 and the second diode D2 of mutual series connection.Wherein, has Section Point b between the first diode D1 and the second diode D2, Section Point b links to each other with first node a, the negative pole end of the first diode D1 links to each other with reference power source VDD, the positive terminal of the first diode D1 links to each other with the negative pole end of the second diode D2, the positive terminal ground connection GND of the second diode D2, and the zero line L of civil power links to each other with ground GND.
In addition, in the present embodiment, as shown in Figure 3, above-mentioned voltage sampling circuit also comprises the 3rd resistance R 3, one end of the 3rd resistance R 3 links to each other with Section Point b, and the other end of the 3rd resistance R 3 and controller 30 for example the AD voltage sample port (A/D) of control chip link to each other.
Compare Fig. 1 and Fig. 3, the voltage sampling circuit that the utility model embodiment proposes has reduced an electrochemical capacitor, a ceramic disc capacitor and a diode than the voltage sampling circuit of prior art, has therefore reduced components and parts, has reduced cost.
In embodiment of the present utility model, as shown in Figure 4, the implementation method of above-mentioned voltage sampling circuit may further comprise the steps:
S1 interrupts when detecting the civil power zero passage handling.
S2, trigger, and time-delay t1.
S3 is when line voltage carries out voltage sample during near peak value.
S4, controller carry out data to be handled.
S5, data are handled, End of Interrupt.
That is to say, the AD voltage sample port (A/D) of control chip detects trigger behind the zero cross signal of civil power, and behind time-delay t1, this moment, line voltage was near peak value, AD voltage sample port (A/D) begins sampling, namely the mild relatively local at the AC signal peak value carries out voltage sample, as shown in Figure 5, thereby realizes directly the voltage of the electric main of input is sampled.
According to the voltage sampling circuit that the utility model embodiment proposes, can when detecting input power supply zero passage, pass through time-delay t1 with sampling input power source voltage peak value, thereby realize directly to importing the power source voltage sampling.This voltage sampling circuit has reduced components and parts, greatly reduces cost.
In addition, another embodiment of the utility model has also proposed a kind of electric heater, comprises above-mentioned voltage sampling circuit.Wherein, this electric heater can be for electric cooker, pressure cooker, slow cooker, fry in shallow oil electrical heating product such as roasting mechanical, electrical steamer.
In the description of this instructions, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present utility model or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment that scope of the present utility model is by claims and be equal to and limit.
Claims (5)
1. a voltage sampling circuit is characterized in that, comprising:
Carry out the division module of dividing potential drop to importing power source voltage, described division module links to each other with described input power supply;
Voltage after partial is clamped at the clamp module of preset range, and described clamp module links to each other with described division module; And
Controller, described controller links to each other with described clamp module, the described controller described input power source voltage peak value of delaying time to sample when detecting described input power supply zero passage.
2. voltage sampling circuit as claimed in claim 1 is characterized in that, described division module comprises:
First resistance and second resistance of mutual series connection, has first node between described first resistance and second resistance, one end of described first resistance links to each other with the positive terminal of described input power supply, the other end of described first resistance links to each other with an end of described second resistance, and the other end of described second resistance links to each other with the negative pole end of described input power supply.
3. voltage sampling circuit as claimed in claim 2 is characterized in that, described clamp module comprises:
First diode and second diode of mutual series connection, has Section Point between described first diode and second diode, described Section Point links to each other with described first node, the negative pole end of described first diode links to each other with reference power source, the positive terminal of described first diode links to each other with the negative pole end of described second diode, the positive terminal ground connection of described second diode.
4. voltage sampling circuit as claimed in claim 3 is characterized in that, also comprises:
The 3rd resistance, an end of described the 3rd resistance links to each other with described Section Point, and the other end of described the 3rd resistance links to each other with described controller.
5. an electric heater is characterized in that, comprises each described voltage sampling circuit as claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320110582 CN203133150U (en) | 2013-03-11 | 2013-03-11 | Voltage sampling circuit and electric heater provided therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320110582 CN203133150U (en) | 2013-03-11 | 2013-03-11 | Voltage sampling circuit and electric heater provided therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203133150U true CN203133150U (en) | 2013-08-14 |
Family
ID=48941121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320110582 Expired - Lifetime CN203133150U (en) | 2013-03-11 | 2013-03-11 | Voltage sampling circuit and electric heater provided therewith |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203133150U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698576A (en) * | 2013-12-18 | 2014-04-02 | 美的集团股份有限公司 | Voltage detection circuit, circuit board provided with same, heating equipment and electric heating product |
| CN107024611A (en) * | 2016-02-02 | 2017-08-08 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its current sample method and current sample module |
| CN107561349A (en) * | 2017-08-18 | 2018-01-09 | 九阳股份有限公司 | The zero passage detection and voltage sampling method and circuit of electromagnetic heater |
-
2013
- 2013-03-11 CN CN 201320110582 patent/CN203133150U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698576A (en) * | 2013-12-18 | 2014-04-02 | 美的集团股份有限公司 | Voltage detection circuit, circuit board provided with same, heating equipment and electric heating product |
| CN107024611A (en) * | 2016-02-02 | 2017-08-08 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its current sample method and current sample module |
| CN107561349A (en) * | 2017-08-18 | 2018-01-09 | 九阳股份有限公司 | The zero passage detection and voltage sampling method and circuit of electromagnetic heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202661906U (en) | Accurate temperature control circuit of thermos | |
| CN103825251B (en) | The software control method of photovoltaic DC-to-AC converter excess temperature output fall volume | |
| CN203133150U (en) | Voltage sampling circuit and electric heater provided therewith | |
| CN103675670A (en) | Pressure switch state detection circuit, circuit board, and electric heating product with circuit board | |
| CN107077112A (en) | The electronic cigarette control circuit and electronic cigarette of powered heater resistance resistance selection function | |
| CN203457345U (en) | Electromagnetic heating device and control circuit thereof | |
| CN104578743A (en) | Power supply control circuit | |
| CN202075333U (en) | Surge current tester | |
| CN203870427U (en) | Low-electricity consumption control circuit in standby state | |
| CN202111886U (en) | Induction cooker with IGBT (insulated gate bipolar transistor) overvoltage protection function | |
| CN203480344U (en) | Energy-saving type heater | |
| CN103675672A (en) | Pressure switch state detection circuit, circuit board, and electric heating product with circuit board | |
| CN105992416B (en) | Electromagnetic heating control circuit and electromagnetic heating apparatus | |
| CN101788827A (en) | Noise-type water level control device | |
| CN204836131U (en) | Effective switch input signal acquisition circuit of high level | |
| CN105703772B (en) | AD detection circuit and electric cooking pot with it | |
| CN204061258U (en) | A kind of atmospheric pollution automatic air-exchanging circuit | |
| CN205789723U (en) | A kind of relay test protection circuit | |
| CN203206133U (en) | Universal socket | |
| CN203705607U (en) | Pressure switch state detection circuit, circuit board and electric heating product containing same | |
| CN209400881U (en) | A kind of lower controller for electric consumption and power circuit | |
| CN206585543U (en) | Level conversion circuit and electrical equipment | |
| CN202995491U (en) | Simple constant-temperature control circuit | |
| CN104454614B (en) | A kind of fan intelligent being applicable to vehicle cooling system controls the control device of device | |
| CN200959102Y (en) | Voltage stabilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |