CN203926087U - Gas water-heater DC fan control gear - Google Patents
Gas water-heater DC fan control gear Download PDFInfo
- Publication number
- CN203926087U CN203926087U CN201420151450.6U CN201420151450U CN203926087U CN 203926087 U CN203926087 U CN 203926087U CN 201420151450 U CN201420151450 U CN 201420151450U CN 203926087 U CN203926087 U CN 203926087U
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- Prior art keywords
- circuit
- fan
- pwm
- gas water
- control gear
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- Expired - Fee Related
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Abstract
A kind of gas water-heater DC fan control gear, comprise power circuit, single chip circuit, pwm circuit, DC fan, power circuit provides power supply for single chip circuit, DC fan, the input end of pwm circuit is electrically connected with single chip circuit PWM mouth, and described DC fan is provided with PWM simulation mouthful, and the output terminal of pwm circuit is electrically connected with the PWM of DC fan simulation mouthful, by reducing circuit elements device, make that control circuit is simple in structure, circuit board size is little, control cost low, reliability is strong.
Description
Technical field
The utility model relates to a kind of DC fan control gear, is applicable to gas water-heater field.
Background technique
At present, in existing large flow forced exhausting gas water heater technology, the main whole rotating speed using scope of principal voltage amplitude modulation speed regulating control DC fan that still adopts, principal voltage amplitude modulation speed governing is by closed loop BUCK ON-OFF control circuit, buffer amplifier circuit composition, wherein closed loop BUCK ON-OFF control circuit includes again switching tube, energy storage power inductance, afterflow Schottky diode, the emitter of switching tube is connected with buffer amplifier circuit resistance, switching tube base stage is connected with buffer amplifier circuit resistance, the collector electrode of switching tube is connected with one end of energy storage power inductance and the negative pole of afterflow Schottky diode, the plus earth of afterflow Schottky diode, the other end of energy storage power inductance is connected with DC fan.Single-chip microcomputer is given certain PWM value by buffer amplifier circuit and principal voltage amplitude modulation alignment circuit, drives DC fan to move with stabilized (steady-state) speed, reaches variable voltage control object.Components and parts are many, cause whole DC fan control circuit complex structure, and circuit board size is large.
Because switching tube is large electric current PNP power tube or P type field effect transistor, the height of controlling cost, and the performance of batch property is difficult to ensure conformity; Energy storage power inductance is easily subject to the impact of magnetic material, poor reliability.For overcoming above-mentioned defect, gas water-heater is improved with DC fan control gear.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of gas water-heater DC fan control gear, by reducing circuit elements device, makes that control circuit is simple in structure, circuit board size is little, controls cost low, and reliability is strong.
The technological scheme that the present invention solves its technical problem employing is: comprise power circuit, single chip circuit, pwm circuit, DC fan, power circuit provides power supply for single chip circuit, DC fan, the input end of pwm circuit is electrically connected with single chip circuit PWM mouth, described DC fan is provided with PWM simulation mouthful, and the output terminal of pwm circuit is electrically connected with the PWM of DC fan simulation mouthful.
Described PWM simulation mouth is arranged on an input end for DC fan controller, for receiving the pwm signal that pwm circuit sends the controller that this signal is sent to DC fan, and then controls the rotating speed of DC fan.
Also comprise rotating speed sample circuit, the input end of rotating speed sample circuit is electrically connected with DC fan output terminal, and the output terminal of rotating speed sample circuit is electrically connected with the input of single chip circuit.
Also comprise current sampling circuit, linear amplification and eliminator, the input end of current sampling circuit is electrically connected with DC fan output terminal, linear amplification and the input end of eliminator and the output terminal of current sampling circuit is electrically connected, output terminal is electrically connected with the input end of single chip circuit.
Described power circuit is switch power or power frequency supply, and output voltage is safety voltage.
Described single chip circuit has AD sampling functions and PWM pulse-width regulated function, and single-chip microcomputer is PIC16 series or MEGA16 series.
The driver frequency of described pwm circuit is 1-20Khz, and adjusting pulsewidth width is 0%-100%.
Operational amplifier in described linearity amplification and eliminator is LM358 series.
Described DC fan is single-phase or multiphase DC blower fan.
The utility model is compared produced beneficial effect with background technique: comprise power circuit because the utility model adopts, single chip circuit, pwm circuit, DC fan, power circuit is single chip circuit, DC fan provides power supply, the input end of pwm circuit is electrically connected with single chip circuit PWM mouth, described DC fan is provided with PWM simulation mouthful, the scheme that the output terminal of pwm circuit is electrically connected with the PWM of DC fan simulation mouth, adopt pulse wide modulation, owing to having saved in existing principal voltage amplitude modulation mode of speed regulation switching tube in closed loop BUCK ON-OFF control circuit, the components and parts such as energy storage power inductance, make control circuit simple in structure, circuit board size is little, control cost low, reliability is strong.
Brief description of the drawings
Fig. 1 is control block diagram of the present utility model;
Fig. 2 is circuit connection diagram of the present utility model.
Embodiment
Referring to accompanying drawing 1, accompanying drawing 2, the present embodiment comprises power circuit 1, single chip circuit 2, pwm circuit 3, DC fan 9, power circuit provides power supply for single chip circuit 2, DC fan 9, the input end of pwm circuit 3 is electrically connected with the PWM mouth of single chip circuit 2, DC fan 9 is provided with PWM simulation mouthful, and the output terminal of pwm circuit 3 is directly electrically connected with the PWM simulation mouthful of DC fan 9.Single chip circuit 2 sends pwm signal by PWM mouth, pwm circuit 3 directly sends the PWM simulation mouthful of DC fan 9 to after this signal amplification is processed, described PWM simulation mouth is arranged on the input end of DC fan 9 controllers, for receiving the pwm signal that pwm circuit 3 sends the controller that this signal is sent to DC fan 9, the controller of DC fan 9 is according to the rotating speed of this pulse width signal control DC fan 9, and the present embodiment directly adopts pulsewidth modulation.Because existing gas water-heater generally adopts principal voltage amplitude modulation speed governing with DC fan control gear, wherein switching tube is large electric current PNP power tube or P type field effect transistor, controls cost higher, and the performance of batch property is difficult to ensure conformity; Energy storage power inductance is easily subject to the impact of magnetic material, and whole DC fan control circuit exists risk.More just because of power component, cause control circuit complex structure, circuit board size is large, the height of controlling cost, poor reliability.The application has saved large electric current PNP power tube or P type field effect transistor and energy storage power inductance constant power element, and circuit is simple, and circuit board size is little, controls cost low, and reliability is strong.
It also comprises rotating speed sample circuit 6, and the input end of rotating speed sample circuit 6 is electrically connected with DC fan 9 output terminals, and the output terminal of rotating speed sample circuit 6 is electrically connected with the input of single chip circuit 2.Single chip circuit 2 can be preset a tachometer value, rotating speed sample circuit 6 can be used as feeder loop by speed feedback real-time DC fan 9 to single chip circuit 2, single chip circuit is by comparing predefined value and actual value, can change the pwm signal of output, make the stabilization of speed of DC fan 9 at predefined value.
It also comprises current sampling circuit 7, linear amplification and eliminator 8, the input end of current sampling circuit 7 is electrically connected with DC fan 9 output terminals, the input end of linear amplification and eliminator 8 is electrically connected with the output terminal of current sampling circuit 7, and output terminal is electrically connected with the input end of single chip circuit 2.Function with speed feedback circuit is above the same, current sampling circuit 7 is also as feedback signal, the real-time current of DC fan 9 to be amplified through linearity and eliminator 8 is sent to single chip circuit 2 after processing, and what single chip circuit 2 can be according to predetermined current value and actual current value relatively adjusts actual output signal.Certainly, if not only comprise rotating speed sample circuit 6 but also comprise current sampling circuit 7, can make single chip circuit 2 control more accurately the working condition of DC fan 9, control stability is stronger.Even if the utility model comprises this 2 feedback signal circuits, control cost also lower than existing principal voltage amplitude modulation speed-regulating controling mode.
Further, described power circuit 1 is switch power or power frequency supply, and output voltage is safety voltage, as 12V, 24V, 36v, ensures the Electrical Safety of each circuit.
Preferably, described single chip circuit 2 has AD sampling functions and PWM pulse-width regulated function, and single-chip microcomputer is PIC16 series or MEGA16 series.
The driver frequency of described pwm circuit 3 is 1-20Khz, and adjusting pulsewidth width is 0%-100%, and when pulsewidth is 0%, DC fan 9 shuts down, and when pulsewidth is 100%, blower fan is with maximum power operation.
As shown in Figure 2, the operational amplifier in linear amplification and eliminator 8 has enlarging function, the optional LM358 series of operational amplifier U1, U2.In current sampling circuit, the resistance of sample-power resistance R 18 is less than or equal to 3 Ω in 7, can be 1 Ω, 2 Ω, 3 Ω.
Described DC fan 9 is single-phase or multiphase DC blower fan.
Claims (9)
1. a gas water-heater DC fan control gear, comprise power circuit (1), single chip circuit (2), pwm circuit (3), DC fan (9), power circuit is that single chip circuit (2), DC fan (9) provide power supply, the input end of pwm circuit (3) is electrically connected with single chip circuit (2) PWM mouth, it is characterized in that described DC fan (9) is provided with PWM simulation mouthful, the output terminal of pwm circuit (3) is electrically connected with the PWM simulation mouthful of DC fan (9).
2. gas water-heater according to claim 1 DC fan control gear, it is characterized in that described PWM simulation mouth is arranged on the input end of DC fan (9) controller, be used for receiving the pwm signal that pwm circuit (3) sends the controller that this signal is sent to DC fan (9), and then control the rotating speed of DC fan (9).
3. gas water-heater according to claim 1 DC fan control gear, characterized by further comprising rotating speed sample circuit (6), the input end of rotating speed sample circuit (6) is electrically connected with DC fan (9) output terminal, and the output terminal of rotating speed sample circuit (6) is electrically connected with the input of single chip circuit (2).
4. according to the gas water-heater DC fan control gear described in claim 1-3 any one, characterized by further comprising current sampling circuit (7), linear amplification and eliminator (8), the input end of current sampling circuit (7) is electrically connected with DC fan (9) output terminal, and the input end of linear amplification and eliminator (8) is electrically connected with the output terminal of current sampling circuit (7), output terminal is electrically connected with the input end of single chip circuit (2).
5. gas water-heater according to claim 1 DC fan control gear, is characterized in that described power circuit (1) is switch power or power frequency supply, and output voltage is safety voltage.
6. gas water-heater according to claim 1 DC fan control gear, is characterized in that described single chip circuit (2) has AD sampling functions and PWM pulse-width regulated function, and single-chip microcomputer is PIC16 series or MEGA16 series.
7. gas water-heater according to claim 1 DC fan control gear, is characterized in that the driver frequency of described pwm circuit (3) is 1-20Khz, and adjusting pulsewidth width is 0%-100%.
8. gas water-heater according to claim 4 DC fan control gear, is characterized in that the operational amplifier in described linearity amplification and eliminator (8) is LM358 series.
9. gas water-heater according to claim 1 DC fan control gear, is characterized in that described DC fan (9) is single-phase or multiphase DC blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151450.6U CN203926087U (en) | 2014-04-01 | 2014-04-01 | Gas water-heater DC fan control gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151450.6U CN203926087U (en) | 2014-04-01 | 2014-04-01 | Gas water-heater DC fan control gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203926087U true CN203926087U (en) | 2014-11-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420151450.6U Expired - Fee Related CN203926087U (en) | 2014-04-01 | 2014-04-01 | Gas water-heater DC fan control gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203926087U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602875A (en) * | 2016-12-02 | 2017-04-26 | 杭州先途电子有限公司 | DC solenoid valve driving circuit and PWM control method based on the same |
| CN106885378A (en) * | 2017-03-31 | 2017-06-23 | 广东万和新电气股份有限公司 | Gas heater wind resistance pressure control system |
| CN110081615A (en) * | 2019-04-26 | 2019-08-02 | 广东万家乐燃气具有限公司 | A kind of gas heater master controller, blower fan control system and gas heater |
-
2014
- 2014-04-01 CN CN201420151450.6U patent/CN203926087U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602875A (en) * | 2016-12-02 | 2017-04-26 | 杭州先途电子有限公司 | DC solenoid valve driving circuit and PWM control method based on the same |
| CN106885378A (en) * | 2017-03-31 | 2017-06-23 | 广东万和新电气股份有限公司 | Gas heater wind resistance pressure control system |
| CN106885378B (en) * | 2017-03-31 | 2020-09-25 | 广东万和新电气股份有限公司 | Wind pressure resistant control system of gas water heater |
| CN110081615A (en) * | 2019-04-26 | 2019-08-02 | 广东万家乐燃气具有限公司 | A kind of gas heater master controller, blower fan control system and gas heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170417 Address after: 528325 Guangdong Province, Foshan city Shunde District Xingtan town De Fu Road No. 71 Patentee after: Guangdong Vanward heat energy technology Co., Ltd. Address before: 528305 Foshan, Shunde District, Ronggui street, Hongqi Road, No. 80 Patentee before: Foshan Shunde Wanhe Electrical Fittings Co., Ltd. |
|
| 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: 20141105 Termination date: 20200401 |