CN100546170C - Stepless speed regulating electric fan - Google Patents
Stepless speed regulating electric fan Download PDFInfo
- Publication number
- CN100546170C CN100546170C CNB2008100265401A CN200810026540A CN100546170C CN 100546170 C CN100546170 C CN 100546170C CN B2008100265401 A CNB2008100265401 A CN B2008100265401A CN 200810026540 A CN200810026540 A CN 200810026540A CN 100546170 C CN100546170 C CN 100546170C
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- CN
- China
- Prior art keywords
- circuit
- electric fan
- optocoupler
- diode
- zero cross
- 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 - Fee Related
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- Control Of Ac Motors In General (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The present invention refers in particular to a kind of stepless speed regulating electric fan, it includes power circuit, drive circuit, control circuit, load motor, also include zero cross detection circuit, one end of zero cross detection circuit is connected with the middle fracture of control circuit, the other end is connected with the live wire of power circuit, the input of load motor is connected with the live wire of power circuit, and output is connected with drive circuit, and drive circuit connects Drive and Control Circuit.The present invention is on the circuit base of former electric fan, increased a zero cross detection circuit, adopt the mode of voltage chopping to adjust the size of the alternating voltage of fan, thereby reach the stepless speed regulation of electric fan, make the user when using electric fan, have more selection, hommization more.
Description
Technical field:
The present invention relates to family expenses fan technical field, refer in particular to a kind of stepless speed regulating electric fan.
Background technology:
Domestic electric fan generally adopts and sets third gear wind at present, change wind speed by the operation winding that changes motor, its wind speed fixedly installs when dispatching from the factory, the user has only three kinds of selections, can't be in a certain gear fine setting, but along with the raising that people require the family expenses fan, more comfortable in order to make fan, requiring has more air quantity requirement available.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of more humane, use more comfortable stepless speed regulating electric fan.
For achieving the above object, technical scheme provided by the invention is: include power circuit, drive circuit, control circuit, load motor, also include zero cross detection circuit, one end of zero cross detection circuit is connected with the middle fracture of control circuit, the other end is connected with the live wire of power circuit, the input of load motor is connected with the live wire of power circuit, and output is connected with drive circuit, and drive circuit connects Drive and Control Circuit.
Zero cross detection circuit includes resistance R
7, R
8, R
9, diode D
3, D
4, optocoupler IC
2, capacitor C
3, wherein, resistance R
7An end be connected to the live wire of power circuit, the other end is connected to diode D
3Positive pole, diode D
3Negative pole and diode D
4Negative pole be connected to optocoupler IC together
2First pin, diode D
4Positive pole link to each other with second pin of optocoupler IC2 and receive+the 5v power supply optocoupler IC
2The 3rd pin ground connection, resistance R
8And R
9An end and optocoupler IC
2The 4th pin link to each other resistance R
8Another termination+5v power supply, R
9The other end and capacitor C
3An end be connected to the middle fracture of control circuit, capacitor C after linking to each other together
3Other end ground connection.
Described load motor is one-way motors or tap motor.
The present invention is on the circuit base of former electric fan, increased a zero cross detection circuit, adopt the mode of voltage chopping to adjust the size of the alternating voltage of fan, thereby reach the stepless speed regulation of electric fan, make the user when using electric fan, have more selection, hommization more.
Description of drawings:
Fig. 1 is an electrical block diagram of the present invention.
Embodiment:
The present invention is described further below in conjunction with accompanying drawing, see shown in the accompanying drawing 1, preferred embodiment of the present invention includes power circuit 1, control circuit 2, drive circuit 3, load motor 4, also include zero cross detection circuit 5, one end of zero cross detection circuit 5 is connected with the middle fracture of control circuit 2, and the other end is connected with the live wire of power circuit 1, and the input of load motor 4 is connected with the live wire of power circuit 1, output is connected with drive circuit 3, and drive circuit 3 connects Drive and Control Circuit 2.Zero cross detection circuit 5 includes resistance R
7, R
8, R
9, diode D
3, D
4, optocoupler IC
2, capacitor C
3, wherein, resistance R
7An end be connected to the live wire of power circuit, the other end is connected to diode D
3Positive pole, diode D
3Negative pole and diode D
4Negative pole be connected to optocoupler IC together
2First pin, diode D
4Positive pole and optocoupler IC
2Second pin link to each other and to receive+the 5v power supply optocoupler IC together
2The 3rd pin ground connection, resistance R
8And R
9An end and optocoupler IC
2The 4th pin link to each other resistance R
8Another termination+5v power supply, R
9The other end and capacitor C
3An end be connected to the middle fracture of control circuit, capacitor C after linking to each other together
3Other end ground connection.Described load motor is one-way motors or tap motor.During work, the sampling ac supply signal of 220V is by current-limiting resistance R
7, halfwave rectifier diode D
3, optocoupler IC
2First pin and second pin to the zero line of power supply, when the live wire of alternating current is timing optocoupler IC
2Conducting, by the photoelectricity coupling, the 4th pin of optocoupler forms low level; When alternating current fire wire for negative the time, because diode D
3Be in the back-pressure state, optocoupler ends, and the 4th pin of optocoupler forms high level.Diode D
4Act as when the live wire of power supply and can prevent optocoupler first pin and the second pin reverse breakdown when negative.R
8Be pull-up resistor, it act as to chip IC
1Pin provides high-low level voltage, R
9Resistance and capacitor C
3Form the RC filter circuit, prevent noise jamming.Chip IC
1Zero crossing by its rising edge and trailing edge sampling power supply.By bidirectional triode thyristor BCR power supply is carried out the size that copped wave changes load motor CM operating voltage, realized the purpose of stepless speed regulation, sampling power supply zero crossing is the size for the trigger angle that changes bidirectional triode thyristor BCR, thereby reaches the requirement of chopper control speed governing.
The embodiment of the above is preferred embodiment of the present invention only, is not to limit practical range of the present invention with this, so the equivalence that all shapes according to the present invention, structure and principle are done changes, all should be covered by in protection scope of the present invention.
Claims (2)
1, stepless speed regulating electric fan, include power circuit, control circuit, drive circuit, load motor, it is characterized in that: also include zero cross detection circuit, one end of zero cross detection circuit is connected with the middle fracture of control circuit, and the other end is connected with the live wire of power circuit, and the input of load motor is connected with the live wire of power circuit, output is connected with drive circuit, drive circuit connects Drive and Control Circuit, and wherein, zero cross detection circuit includes resistance R
7, R
8, R
9, diode D
3, D
4, optocoupler IC
2, capacitor C
3, wherein, resistance R
7An end be connected to the live wire of power circuit, the other end is connected to diode D
3Positive pole, diode D
3Negative pole and diode D
4Negative pole be connected to optocoupler IC together
2First pin, diode D
4Positive pole link to each other with second pin of optocoupler IC2 and receive+the 5v power supply optocoupler IC
2The 3rd pin ground connection, resistance R
8And R
9An end and optocoupler IC
2The 4th pin link to each other resistance R
8Another termination+5v power supply, R
9The other end and capacitor C
3An end be connected to the middle fracture of control circuit, capacitor C after linking to each other together
3Other end ground connection.
2, stepless speed regulating electric fan according to claim 1 is characterized in that: described load motor is one-way motors or tap motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100265401A CN100546170C (en) | 2008-02-29 | 2008-02-29 | Stepless speed regulating electric fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100265401A CN100546170C (en) | 2008-02-29 | 2008-02-29 | Stepless speed regulating electric fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101257280A CN101257280A (en) | 2008-09-03 |
| CN100546170C true CN100546170C (en) | 2009-09-30 |
Family
ID=39891810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100265401A Expired - Fee Related CN100546170C (en) | 2008-02-29 | 2008-02-29 | Stepless speed regulating electric fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100546170C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889662B (en) * | 2011-07-20 | 2016-08-17 | 广东松下环境***有限公司 | Ventilation fan |
| CN102817860B (en) * | 2012-08-17 | 2015-02-18 | 佛山市顺德区海伦宝电器有限公司 | Multi-gear control circuit for air conditioner fan or fan |
| CN102879633A (en) * | 2012-09-25 | 2013-01-16 | 上海微频莱机电科技有限公司 | Safety protective structure of zero-crossing detection circuit |
| CN105158549A (en) * | 2015-08-30 | 2015-12-16 | 成都千里电子设备有限公司 | Zero cross detection circuit with accurate detection |
| CN106015070A (en) * | 2016-06-22 | 2016-10-12 | 佛山市顺德区海伦宝电器有限公司 | Gear shifting zero-crossing switching circuit used for fan or cooling fan |
-
2008
- 2008-02-29 CN CNB2008100265401A patent/CN100546170C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101257280A (en) | 2008-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20160229 |