CN2750086Y - Rotary speed control device for fan - Google Patents
Rotary speed control device for fan Download PDFInfo
- Publication number
- CN2750086Y CN2750086Y CN 200420082195 CN200420082195U CN2750086Y CN 2750086 Y CN2750086 Y CN 2750086Y CN 200420082195 CN200420082195 CN 200420082195 CN 200420082195 U CN200420082195 U CN 200420082195U CN 2750086 Y CN2750086 Y CN 2750086Y
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- CN
- China
- Prior art keywords
- fan
- speed control
- detecting
- power
- differential amplifier
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- Expired - Fee Related
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Abstract
The utility model relates to a rotary speed control device for fan which is provided with a selective switch. One input terminal of the selective switch connects to a detecting circuit of the supply power. The output terminal externally connects to the fan via a transistor and a resistor. The detecting circuit of the supply power is provided with a power detecting differential amplifier. The input voltage and the output voltage of rotary speed control device for fan respectively connect to the in-phase and the opposite phase input terminals of the power detecting differential amplifier. The output signal of the power detected differential amplifier isoutput to an input terminal of the selective switch after comparing with a referential power signal. The rotary speed control device for fan can effectively control the speed of the computer fan in many ways to make the control mode of the fan more flexible and various and to prolong the service life of the fan, reduce noise, save resource and improve the using benefit of the computer.
Description
Technical field
The utility model relates to a kind of fan rotation speed control apparatus.
Background technique
Be installed on the radiation fan on the computer, be used for power supply unit and CPU heat radiation mostly: when power supply unit starts or cpu temperature when too high, fan promptly starts and rotates heat radiation, till power-off.Owing to be applicable to that the fan on the computer there is no devices such as any wind speed control, therefore, fan from launch computer to closing, all be in the state that rotates at full speed, in use for some time, the as easy as rolling off a log damage of fan, make shorten its working life, also make the utilization benefit of computer reduce; Secondly, because fan is done the additional waste that running at full speed can produce noise and cause electric current, for the system of a computer work, when the fan of multiple computers starts simultaneously, can produce sizable noise, and the electric current that uses also improves relatively, form power wastage; Moreover real work place that the fan of general computer can only be fixedly arranged on single-point is dispelled the heat, but can't record the temperature of environmental work, so, generally speaking quite impracticable, also uneconomical; And the general employed fan of computer all is single individuality, without any doing the device of control simultaneously, therefore must provide power supply separately, and this not only causes the waste of power supply, also makes the utilization benefit of computer reduce simultaneously.So which kind of operating mode the rotating speed of controlling computer radiation fan how effectively selects order about or the rotating speed of controlling computer radiation fan, has become present urgency problem to be solved.
The model utility content
The purpose of this utility model is to overcome the deficiency that above-mentioned prior art exists, and a kind of fan rotation speed control apparatus is provided, in many ways the rotating speed of effective controlling computer fan, improve fan working life, reduce noise, save resource, improve the utilization benefit of computer.
For achieving the above object, the utility model provides a kind of fan rotation speed control apparatus, is characterized in being provided with a selector switch, an input termination one power circuit for detecting of this selector switch, and output terminal is through a triode and resistance external fan; Described power circuit for detecting is provided with a power detecting differential amplifier, the input voltage of fan rotation speed control apparatus and output voltage connect same, the inverting input of this power detecting differential amplifier respectively, and the output signal of this power detecting differential amplifier and a reference power signal export an input end of selector switch after relatively to.
Described fan rotation speed control apparatus is also established an ambient temperature sensing circuit, comprises the first temperature detecting device, and this a temperature detecting device detection signal and a reference temperature signal export another input end of selector switch after relatively to.
Described fan rotation speed control apparatus is also established an environment and equipment temperature difference circuit for detecting, comprise device temperature sensor and ambient temperature sensing device, this two sensor inserts homophase, the inverting input of a temperature detecting differential amplifier respectively, and the output signal of this temperature detecting differential amplifier and exports the 3rd input end of selector switch after relatively to reference to temperature signal.
The base stage of the output termination triode of described selector switch connects transistor collector through resistance, and this transistor emitter exports fan to through resistance, and this triode is a NPN type triode.
Described fan rotation speed control apparatus can be selected the mode of one or more control fan running situations.
The utility model can be detected the temperature difference that the real work power, inside of power supply unit or outside work or environment or a detecting point temperature, working environment and equipment temperature rise are produced, and can be when the detecting value surpasses the respective settings value, open selector switch, control fan microrunning or stall.The utility model also can be by the setting of selector switch, one or more modes in the temperature difference that is produced according to temperature, working environment and the equipment work temperature rise of the real work power of power supply unit, inside or outside work or environment or detecting point are controlled the operational situation of fan, make that the control mode of fan is more versatile and flexible, thereby improve fan working life, reduce noise, save resource, improve the utilization benefit of computer.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Linkage structure block diagram when Fig. 2 uses for the utility model.
Schematic perspective view when Fig. 3 uses for the utility model.
Fig. 4 is a workflow diagram of the present utility model.
Embodiment
The utility model fan rotation speed control apparatus 5, as shown in Figure 1, be provided with a selector switch 1, the input end of this selector switch 1 connects power circuit for detecting 2, ambient temperature sensing circuit 3 and environment and equipment temperature difference circuit for detecting 4 respectively, and output terminal is through a triode Q and resistance R wind-receiving fan 7.
Wherein power circuit for detecting 2 is provided with a power detecting differential amplifier A 1, the input voltage of fan rotation speed control apparatus 5 (from power supply unit 6) and output voltage connect the positive and negative input end mutually of this power detecting differential amplifier A 1 respectively, and the output signal of this power detecting differential amplifier A 1 and a reference signal export an input end of selector switch 1 after relatively to through first comparator C 1.
Ambient temperature sensing circuit 3 comprises the first temperature detecting device NTH, and this temperature detecting device NTH is used to detect inside or outside work or environment or detecting point temperature.The inverting input of this temperature detecting device NTH one termination second comparator C 2, the other end ground connection; The inverting input of described second comparator C 2 connects a reference temperature signal (reference voltage or electric current), and connects its output terminal through resistance R 3, and another input end of switch 2 is selected in this output terminal selecting.
Environment and equipment temperature difference circuit for detecting 4 comprise device temperature sensor NTC1 and ambient temperature sensing device NTC2, and wherein device temperature sensor NTC1 is used for the detection equipment temperature, and ambient temperature sensing device NTC2 is used for the temperature of work of detection and examination environment.One end of this two sensor connects homophase, the inverting input of a temperature detecting differential amplifier A 2 respectively, the equal ground connection of the other end.The output terminal of this temperature detecting differential amplifier A 2 connects the in-phase input end of the 3rd comparator C 3 through resistance.The inverting input of the 3rd comparator C 3 connects one with reference to temperature signal, and the 3rd input end of switch 1 is selected in the output terminal selecting.
The base stage of the output termination triode Q of selector switch 1 connects triode Q collector electrode through resistance R, and this triode Q emitter is through resistance R external fan 7.This triode Q is a NPN type triode.
The utility model can when working power surpasses setting power (reference power), be opened selector switch 1, control fan microrunning or stall by the real work power of power circuit for detecting 2 detecting power supply units; By 3 detectings of ambient temperature sensing circuit inner or outside work or environment or detecting point temperature, when temperature surpasses setting temperature (reference temperature), open selector switch 1, control fan microrunning or stall; By environment and equipment temperature difference circuit for detecting 3, compare the temperature difference that working environment and equipment temperature rise are produced, when surpassing, this temperature difference sets the temperature difference (with reference to the temperature difference), open selector switch 1, control fan microrunning or stall.Described selector switch 1 also can be set only by a kind of control mode work as long as can open the purpose of controlling rotation speed of the fan to reach when satisfying more than taking place arbitrary situation.Connection block diagram, schematic perspective view and workflow when the utility model fan rotation speed control apparatus 5 uses are respectively shown in Fig. 2,3,4.
The utility model can be by the setting of selector switch, one or more modes in the temperature difference that is produced according to temperature, working environment and the equipment work temperature rise of the real work power of power supply unit, inside or outside work or environment or detecting point are controlled the operational situation of fan, make that the control mode of fan is more versatile and flexible.
Claims (4)
1, a kind of fan rotation speed control apparatus is characterized in that being provided with a selector switch (1), an input termination one power circuit for detecting (2) of this selector switch (1), and output terminal is through a triode Q and resistance R external fan; Described power circuit for detecting (2) is provided with a power detecting differential amplifier A 1, the input voltage of fan rotation speed control apparatus and output voltage connect same, the inverting input of this power detecting differential amplifier A 1 respectively, an input end of the described selector switch of output termination (1) of this power detecting differential amplifier A 1.
2, fan rotation speed control apparatus according to claim 1 is characterized in that also establishing an ambient temperature sensing circuit (3), comprises the first temperature detecting device NTH, and another input end of switch (2) is selected in the output terminal selecting of this temperature detecting device NTH.
3, fan rotation speed control apparatus according to claim 1 and 2, it is characterized in that also establishing an environment and equipment temperature difference circuit for detecting (4), comprise device temperature sensor NTC1 and ambient temperature sensing device NTC2, this two sensor inserts homophase, the inverting input of a temperature detecting differential amplifier A 2 respectively, and the 3rd input end of switch (1) is selected in the output terminal selecting of this temperature detecting differential amplifier A 2.
4, fan rotation speed control apparatus according to claim 3, the base stage that it is characterized in that the output termination triode Q of selector switch (1), connect triode Q collector electrode through resistance, this triode Q emitter is connected to fan through resistance R, and this triode Q is a NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082195 CN2750086Y (en) | 2004-08-25 | 2004-08-25 | Rotary speed control device for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082195 CN2750086Y (en) | 2004-08-25 | 2004-08-25 | Rotary speed control device for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2750086Y true CN2750086Y (en) | 2006-01-04 |
Family
ID=35823469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420082195 Expired - Fee Related CN2750086Y (en) | 2004-08-25 | 2004-08-25 | Rotary speed control device for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2750086Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281398B (en) * | 2007-04-05 | 2010-05-19 | 环达电脑(上海)有限公司 | Method and system for monitoring rotary speed signal of multiple fans |
| CN101929476B (en) * | 2009-06-18 | 2013-03-27 | 中国长城计算机深圳股份有限公司 | Fan rotating speed control circuit and fan device |
| CN103225620A (en) * | 2012-01-30 | 2013-07-31 | 华硕电脑股份有限公司 | Fan controlling method and electronic device |
| CN102027428B (en) * | 2008-04-01 | 2013-10-09 | 惠普发展公司，有限责任合伙企业 | Management of a 3D package and cooling system |
| CN107327412A (en) * | 2016-04-29 | 2017-11-07 | 成都韵能科技有限公司 | The electric fan shown with power |
-
2004
- 2004-08-25 CN CN 200420082195 patent/CN2750086Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281398B (en) * | 2007-04-05 | 2010-05-19 | 环达电脑(上海)有限公司 | Method and system for monitoring rotary speed signal of multiple fans |
| CN102027428B (en) * | 2008-04-01 | 2013-10-09 | 惠普发展公司，有限责任合伙企业 | Management of a 3D package and cooling system |
| US8560141B2 (en) | 2008-04-01 | 2013-10-15 | Hewlett-Packard Development Company, L.P. | Management of a 3D package and cooling system |
| CN101929476B (en) * | 2009-06-18 | 2013-03-27 | 中国长城计算机深圳股份有限公司 | Fan rotating speed control circuit and fan device |
| CN103225620A (en) * | 2012-01-30 | 2013-07-31 | 华硕电脑股份有限公司 | Fan controlling method and electronic device |
| CN103225620B (en) * | 2012-01-30 | 2015-06-17 | 华硕电脑股份有限公司 | Fan controlling method and electronic device |
| CN107327412A (en) * | 2016-04-29 | 2017-11-07 | 成都韵能科技有限公司 | The electric fan shown with power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |