CN202280641U - Fan control circuit - Google Patents
Fan control circuit Download PDFInfo
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- CN202280641U CN202280641U CN2011202514887U CN201120251488U CN202280641U CN 202280641 U CN202280641 U CN 202280641U CN 2011202514887 U CN2011202514887 U CN 2011202514887U CN 201120251488 U CN201120251488 U CN 201120251488U CN 202280641 U CN202280641 U CN 202280641U
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- Prior art keywords
- fan
- capacitor
- resistance
- fan control
- control circuitry
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Abstract
The utility model provides a fan control circuit which is an improvement of a fan control circuit in the prior art, specifically, a time-delay circuit for delaying time is integrated on the IC (integrated circuit) unit for driving the fan to run and a driving circuit connected to the IC unit. When an electric device is started, the fan is set to be ran in a low speed in a certain time through the structure of the time-delay circuit, and the normal running of the fan is started when the setting time is reached. The fan control circuit realizes the aims of the time delay of the fan when the electric device is started and realizes the aims of energy saving and noise and pollution reduction when the fan is not required to perform air cooling.
Description
Technical field
The utility model relates to fan and makes the field, relates to a kind of fan control circuitry in particular.
Background technique
In the running of electronic equipments such as current all kinds of instrumentation, machinery, computer, can produce great amount of heat.And the heat of the longer accumulation of time of electronic equipment operation is also just many more, makes the temperature of each parts of electronic equipment also increase, thus the loss of each parts when causing electronic equipment to move.Therefore, too high for fear of electronic equipment temperature in the process of operation, influence the operation of whole electric equipment, adopt a large amount of fans to carry out air-cooled in the prior art to operating electronic equipment.
Generally speaking, after the electronic equipment start, all kinds of fans are also entry into service simultaneously under existing fan control circuitry.This fan control circuitry is made up of IC unit and the drive circuit that is connected with the IC unit, is used to control the running of fan.But, do not need condition air-cooled or cooling because the electronic equipment that has just brought into operation reaches, and the constant rotating speed of fan that need not turn round this moment turns round, and not only wastes energy, but also can produce noise pollutions such as electricity, magnetic, sound.
Therefore, a kind of novel fan control circuitry that can solve above-mentioned existing technology fan shortcoming of current exigence.
The model utility content
In view of this, the utility model provides a kind of fan control circuitry, carries out turning round in the air-cooled process need not with the fan that overcomes existing technology, thereby causes the problem of energy waste and noise pollution.
For realizing above-mentioned purpose, the utility model provides following technological scheme:
A kind of fan control circuitry comprises IC unit and drive circuit that drive fan turns round, also comprises: with IC unit and the integrated delay circuit of drive circuit.
Preferably, said delay circuit comprises:
One capacitor C 4, said capacitor C 4 positive poles are connected to power supply, and negative pole links to each other with a resistance R 9, diode C4 respectively;
The other end of said resistance R 9 connects the base stage of a resistance R 10 and triode Q0 respectively;
The collector electrode of said triode Q0 is connected in the VPWM end of IC unit;
The emitter of said diode C4, said triode Q0, and said resistance R 10 end that do not connect resistance R 9 be connected with ground.
Preferably, also comprise: capacitor C 5;
One end of said capacitor C 5 is connected in the connecting end of said resistance R 9 and resistance R 10;
The other end of said capacitor C 5 connects ground.
Preferably, said fan is the fan with pulse duration modulation structure.
Preferably, said IC unit is the driving chip of Hall structure.
Preferably, said IC unit is the driving chip of model AM4962.
Preferably, said capacitor C 4 is an electrochemical capacitor.
Preferably, through adjusting the value of the said capacitor C 4, resistance R 9 and the R10 that connect, set the time span of time-delay.
Preferably, said capacitor C 5 is an electrochemical capacitor.
Can know via above-mentioned technological scheme; Compared with prior art; The utility model openly provides a kind of fan control circuitry, improves through the fan control circuitry to existing technology, at IC (the integrated circuit of drive fan running; Intergrated circuit) on the connected drive circuit in unit, the integrated delay circuit that is used to delay time.After electronic equipment starts, set fan through the structure of delay circuit and remain on the low-speed running state within a certain period of time, the normal operation of after set time arrives, restarting normal fan.Promptly utilize this delay circuit to realize the time-delay purpose of fan after electronic equipment starts, be implemented in and need not fan and carry out when air-cooled energy saving and the purpose that reduces noise pollution.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is the embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to the accompanying drawing that provides.
Fig. 1 is the structural representation of the disclosed a kind of fan control circuitry of the utility model;
Fig. 2 is the particular circuit configurations schematic representation of the disclosed a kind of fan control circuitry of the utility model.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technological scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment discloses a kind of fan control circuitry, and is as shown in Figure 1, mainly comprises:
IC (the integrated circuit that is used for the drive fan running; Intergrated circuit) unit 101 and drive circuit 102; And with the integrated delay circuit 103 of this IC unit 101 and driver element 102; This delay circuit 103 is used for after corresponding electronic device starts, and is used for air-cooled fan and delays time being applied to the electronic equipment place, makes fan low-speed running in the time of setting.
Concrete time-delay mode describes through the concrete structure of following delay circuit 103 in whole intergrated circuit.
As shown in Figure 2, be the particular circuit configurations schematic representation of the disclosed a kind of fan control circuitry of the utility model.
Among Fig. 2, the IC unit marks is IC1, and this IC1 can be the driving chip of Hall structure, can be the driving chip of AM4962 for concrete model also.
Drive circuit then is made up of Hall transducer, minimum speed initialization circuit, PWM application circuit, counterelectromotive force protective circuit, reverse-connection protection circuit and inside circuit PWM frequency setting circuit; This drive circuit specifically is made up of diode D1～D3, resistance R 1～R8, capacitor C 1～C3, capacitor C 7, triode Q1～Q2, chip IC 2 and inductance L 1 in Fig. 2.
Delay circuit is made up of capacitor C 4, resistance R 9, resistance R 10, diode C4 and triode Q0.Foregoing circuit, and the annexation between each components and parts of inside circuit and and IC1 between annexation specifically as shown in Figure 2.
Need to prove that in delay circuit, capacitor C 4 positive poles are connected to power supply VCC, negative pole then links to each other with resistance R 9, diode C4 respectively.
The other end that resistance R 9 is not connected with capacitor C 4 is connected with the base stage of resistance R 10 with triode Q0 respectively.
The collector electrode of triode Q0 then is connected in the VPWM end of IC1.(the VPWM end is the pulse duration modulation control end for PWM, Pulse Width Modulation, pulse duration modulation).
In addition, the emitter of triode Q0, diode C4 and resistance R 10 end that do not connect resistance R 9 is connected with ground.
In above-mentioned delay circuit disclosed in the utility model, also comprise capacitor C 5, an end of this capacitor C 5 is connected in the connecting end of said resistance R 9 and resistance R 10, and the other end connects ground.
Need to prove that the capacitor C 4 in the above-mentioned delay circuit can adopt electrochemical capacitor with capacitor C 5.
Specifically to the time-delay control of fan, below provide an example to delay time 10 seconds based on foregoing circuit, ICl is that the driving chip of model AM4962 is that example is elaborated.
Provide an example:
In the process of fan being controlled based on said integrated circuit, when being high level, rotation speed of the fan is fast as VPWM (PIN4 of ICl end, i.e. the 4th end among Fig. 2); When VPWM was low level, rotation speed of the fan was slow, and promptly the rotating speed of fan is by the control of Electric potentials of VPWM end.
In the process of control fan running, in order to reach the purpose of fan time-delay running in 10 seconds, the value of capacitor C 4 is 10uF (microfarad) in the delay circuit; The value of resistance R 9 is 1.5M Ω (megohm); The value of resistance R 10 is 22M Ω; The value of capacitor C 5 is 220pF (pico farad).
At fan control circuitry powered on moment for the first time, based on the principle that the current potential at electric capacity two ends can not suddenly change, the current potential at capacitor C 4 two ends is Vcc current potential (operating voltage of setting fan is 12 volts) entirely.
At this moment, the current potential at triode Q0 base stage place is about:
12×22/22+1.5＝11.23V
Make triode Q0 be on state, thus, the current potential that connects the VPWM end of triode Q0 collector electrode then is clamped at low level.
The current rotating speed of fan is by the control of Electric potentials of minimum speed control end VMIN (the PIN3 end of IC, i.e. the 3rd end), because the current potential of VPWM end is inoperative, then when the minimum speed running of front fan to set.
As time goes on, capacitor C 4 is discharged through resistance R 10 and resistance R 9 over the ground, makes that the voltage at capacitor C 4 two ends is drawn back.Negative pole current potential at C4 electric capacity continues to descend, and can be known that by the value of capacitor C 4, resistance R 9 and resistance R 10 after through 10 seconds, the current potential of capacitor C 4 negative pole ends drops to about 0.75V.At this moment, triode Q0 base potential is about 0.7V, and triode Q0 will be changed into by conducting and end, and its clamping state for the VPWM end will be released.After the clamping state that discharges the VPWM end, this delay circuit will quit work.
In the process of control fan running, when the rotating speed of fan changes the control of Electric potentials by the VPWM end into.Then utilize diode D4 to solve fan when snap switch machine continuously, 10 seconds inoperative problems of delaying time.Be specially:
When not adding diode D4, after this fan control circuitry outage, because the resistance sum of resistance R 9 and resistance R 10 is bigger, less to the charging current of capacitor C 4, the potential difference that causes electric capacity C4 to go up two ends can not make zero fast.Thus, in short period continuous start process at interval, triode Q0 base potential also is in low potential, and promptly triode Q0 keeps cut-off state always, and outside PWM input signal determines the current rotating speed of fan all the time, thereby can't produce 10 seconds time-delay.
When being provided with diode D4, after the fan shutdown, because the positive pole of capacitor C 4 arrives low potential through the ICl repid discharge, promptly the current potential of capacitor C 4 negative terminals is pulled to negative potential (with respect to ground).At this moment, ground to capacitor C 4 quick charges, makes zero the potential difference at capacitor C 4 two ends through diode D4 fast, avoids when the continuous start at short period interval, and the potential difference at capacitor C 4 two ends can not make zero.
Therefore no matter, adopt above-mentioned disclosed in the utility model and IC unit and the integrated delay circuit of drive circuit, be to be in the state of start first, or the state of frequent switching on and shutting down, the time-delay that can both produce set time.The process of set time is adjusted the time of time-delay then through the value of capacitor C 4, resistance R 9 and resistance R 10.
Need to prove that in above-mentioned a kind of fan control circuitry disclosed in the utility model, the fan of being controlled includes but are not limited to the fan with pulse duration modulation structure.
In sum:
Through above-mentioned on the connected drive circuit in IC unit of drive fan running, the integrated delay circuit that is used to delay time.After electronic equipment starts, set fan through the structure of delay circuit and remain on the low-speed running state within a certain period of time, the normal operation of after set time arrives, restarting normal fan.Promptly utilize this delay circuit to realize the time-delay purpose of fan after electronic equipment starts, be implemented in and need not fan and carry out when air-cooled energy saving and the purpose that reduces noise pollution.Simultaneously, state in realization in the process of soft start, reduce the inrush current of fan, and reduce the total current of electronic equipment between the starting period, reduce impact and the interference of inrush current power supply.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation of spirit that does not break away from the utility model or scope in other embodiments among this paper.Therefore, the utility model will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. a fan control circuitry comprises IC unit and drive circuit that drive fan turns round, it is characterized in that, also comprises: with IC unit and the integrated delay circuit of drive circuit.
2. fan control circuitry according to claim 1 is characterized in that, said delay circuit comprises:
One capacitor C 4, said capacitor C 4 positive poles are connected to power supply, and negative pole links to each other with a resistance R 9, diode C4 respectively;
The other end of said resistance R 9 connects the base stage of a resistance R 10 and triode Q0 respectively;
The collector electrode of said triode Q0 is connected in the VPWM end of IC unit;
The emitter of said diode C4, said triode Q0, and said resistance R 10 end that do not connect resistance R 9 be connected with ground.
3. fan control circuitry according to claim 2 is characterized in that, also comprises: capacitor C 5;
One end of said capacitor C 5 is connected in the connecting end of said resistance R 9 and resistance R 10;
The other end of said capacitor C 5 connects ground.
4. according to any described fan control circuitry in the claim 1～3, it is characterized in that said fan is the fan with pulse duration modulation structure.
5. according to any described fan control circuitry in the claim 1～3, it is characterized in that said IC unit is the driving chip of Hall structure.
6. according to any described fan control circuitry in the claim 1～3, it is characterized in that said IC unit is the driving chip of model AM4962.
7. according to any described fan control circuitry in the claim 1～3, it is characterized in that said capacitor C 4 is an electrochemical capacitor.
8. fan control circuitry according to claim 3 is characterized in that, said capacitor C 5 is an electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202514887U CN202280641U (en) | 2011-07-15 | 2011-07-15 | Fan control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202514887U CN202280641U (en) | 2011-07-15 | 2011-07-15 | Fan control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280641U true CN202280641U (en) | 2012-06-20 |
Family
ID=46226811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202514887U Expired - Lifetime CN202280641U (en) | 2011-07-15 | 2011-07-15 | Fan control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280641U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184446A (en) * | 2013-05-22 | 2014-12-03 | 海洋王（东莞）照明科技有限公司 | Frequency generator signal output circuit and fan |
-
2011
- 2011-07-15 CN CN2011202514887U patent/CN202280641U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184446A (en) * | 2013-05-22 | 2014-12-03 | 海洋王（东莞）照明科技有限公司 | Frequency generator signal output circuit and fan |
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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 |
Effective date of registration: 20210203 Address after: No. 1600, Zixing Road, Minhang District, Shanghai 200241 Patentee after: BCD (SHANGHAI) MICRO-ELECTRONICS Ltd. Address before: 200233 No. 800, Xuhui District, Shanghai, Yishan Road Patentee before: BCD Semiconductor Manufacturing Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |
|
| CX01 | Expiry of patent term |