CN2731151Y - Temperature controlled fan - Google Patents
Temperature controlled fan Download PDFInfo
- Publication number
- CN2731151Y CN2731151Y CN 200420096513 CN200420096513U CN2731151Y CN 2731151 Y CN2731151 Y CN 2731151Y CN 200420096513 CN200420096513 CN 200420096513 CN 200420096513 U CN200420096513 U CN 200420096513U CN 2731151 Y CN2731151 Y CN 2731151Y
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- CN
- China
- Prior art keywords
- circuit
- electrical signal
- temperature
- fan
- rotating
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- Expired - Lifetime
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Abstract
The utility model discloses a temperature controlled fan, comprising a rotary speed control circuit, a temperature measuring circuit for sensing the environment temperature and generating the control electrical signal according to the environment temperature, and a comparison circuit. The output terminal of the temperature measuring circuit is connected to the first input terminal of the comparison circuit. The second input terminal of the comparison circuit inputs the consulting electrical signal. The output terminal of the comparison circuit is connected to the input terminal of the rotary speed control circuit. The comparison circuit compares the control electrical signal and the consulting electrical signal and generates the output electrical signal output to the rotary speed control circuit. The rotary speed control circuit adjusts the rotary speed of the fan according to the output electrical signal.
Description
Technical field
The utility model relates to the rotation speed of the fan regulation technology, especially relates to the temperature-controlled fan that a kind of basis can be regulated rotating speed automatically according to temperature.
Background technique
General electronic equipment all can produce heat when operation, for the loss that prevents that high temperature from may bring, adopt fan to dispel the heat usually.
At present, the brush DC fan can have the function of temperature control, sees also Fig. 1, is a kind of theory diagram of temperature-controlled fan of prior art.Promptly on fan (figure does not show), add temperature control circuit 10, by temperature transducer 11 sense ambient temperature, and being input to rotating-speed control circuit 13 after being converted into electrical signal according to the difference of ambient temperature by temperature measurement circuit 12, rotating-speed control circuit 13 is controlled the rotating speed of fan according to input voltage.
This mode can be adjusted rotating speed by fan automatically under the constant prerequisite of fan power supply voltage, but being limited in scope of rotating speed adjustment.This be because: the input voltage of rotating-speed control circuit 13 should be within limits, when actual input voltage during less than specified input voltage minimum value, rotation speed of the fan is identical during with specified input voltage minimum value, when actual input voltage during greater than specified input voltage maximum value, rotation speed of the fan is identical during with specified input voltage maximum value, and the voltage change of temperature measurement circuit 12 corresponding variation of ambient temperature can think not have the boundary line, like this, just formed the temperature control curve of the temperature-controlled fan of prior art, as shown in Figure 2.That is: when ambient temperature less than T
MinThe time, fan is stabilized in minimum speed S
Min, when ambient temperature is higher than T
MinLess than T
MaxThe time, rotation speed of the fan is at S
MinTo S
MaxBetween according in advance setting linear change, when ambient temperature is higher than T
MaxThe time, rotation speed of the fan is stabilized in maximum speed S
Max
Often using in the system of fan, system fan as desk top computer, be not whenever all to need fan work, under the lower condition of ambient temperature, system fan quits work and can't have influence on the stability of computer, and can reduce noise, still, use the temperature-controlled fan of prior art to be difficult to realize fan stall function.
This is because if use existing temperature-controlled fan, by adjusting the parameter of rotating-speed control circuit 13, can realize that ambient temperature is T
MinThe time rotation speed of the fan 0, but this can cause in ambient temperature greater than T
MinBut relatively near T
MinThe time, fan is dynamic but not to be overcome resistance and causes fan not rotate because of power is too for a short time, can damage fan like this, that is to say, for fan, some lower rotating speed is impossible realize, making fan be in this slow-speed of revolution section (actual speed of this speed stage fan is 0, thereby is theoretic speed stage) can cause damage to fan.
Therefore, for existing temperature-controlled fan, in order to keep fan to run well and not stall, the fan minimum speed need remain on about 40% of fan's rated speed, can reach below 40% of rated speed even when circuit design, set the minimum speed of fan, but in fact because the effect of fan rotary system resistance, fan can't stable operation under low like this rotating speed, at any time may stall owing to braking torque can not overcome resisting moment, and braking torque in fact also acts on the fan when stall, so very easily causes circuit burnout.
The model utility content
The technical problem that the utility model solves is to provide a kind of temperature-controlled fan, can be in stall under the setting temperature, thus satisfy noise reduction, requirements of saving energy better.
For this reason, the technological scheme of the utility model technical solution problem is: a kind of temperature-controlled fan is provided, comprises rotating-speed control circuit, be used for sense ambient temperature and generate the temperature measurement circuit of control electrical signal according to ambient temperature; Also comprise comparison circuit; The output terminal of described temperature measurement circuit is connected to the first input end of comparison circuit, second input end input reference electrical signal of described comparison circuit, and the output terminal of described comparison circuit is connected to the input end of rotating-speed control circuit; Described comparison circuit relatively should be controlled electrical signal and reference electrical signal, and produced the output electrical signal that outputs to rotating-speed control circuit; Described rotating-speed control circuit is adjusted the rotating speed of fan according to described output electrical signal.
Preferably, described comparison circuit comprises that comparator and reference electrical signal produce circuit, and the output terminal of described reference electrical signal generation circuit is connected to second input end of comparator.
Preferably, it is bleeder circuit that described reference electrical signal produces circuit, and its output terminal is the dividing point of bleeder circuit.
Preferably, described temperature measurement circuit comprises that temperature transducer and control electrical signal produce circuit; Described temperature sensor senses ambient temperature, described control electrical signal produce circuit produces correspondence according to the induction of temperature transducer control electrical signal.
Preferably, described temperature measurement circuit comprises the bleeder circuit that thermistor and fixed value resistance are formed, the resistance of described thermistor changes with the variation of ambient temperature, and the voltage at the dividing point place of described thermistor and fixed value resistance forms the control electrical signal thereupon changing.
Preferably, described rotating-speed control circuit comprises control unit, driver element and fan propeller angle inducting cell; Described control unit produces drive signal and is input to driver element according to the output electrical signal of comparison circuit, described driver element is according to this drive fan propeller motion, and described fan propeller angle inducting cell is input to control unit with the fan propeller angle signal.
Preferably, described control unit adopts chip LB11961; Described driver element adopts control coil; Described fan propeller angle inducting cell adopts chip ATS266.
With respect to prior art, the beneficial effects of the utility model are: at first, because temperature-controlled fan of the present utility model has comparison circuit, by relatively controlling electrical signal and reference electrical signal, make when ambient temperature during less than a certain setting temperature, can export specific voltage, thus the stall of rotating-speed control circuit control fan; After ambient temperature arrives this setting temperature, rotating-speed control circuit will be controlled fan and run well; Thereby both allowed fan reach minimum speed, and allowed it skip the slow-speed of revolution section that can cause self to damage simultaneously.That is to say that temperature-controlled fan of the present utility model can better meet noise reduction, requirements of saving energy in the function with stall under setting temperature.Secondly, the utility model is realized the stall function by improving circuit design, thereby can realize temperature control scheme of the present utility model under the prerequisite of lower cost, less variation.
Description of drawings
Fig. 1 is a kind of theory diagram of temperature-controlled fan of prior art;
Fig. 2 is the temperature control curve schematic representation of temperature-controlled fan shown in Figure 1;
Fig. 3 is the block diagram of the utility model temperature-controlled fan;
Fig. 4 is the operation workflow figure of temperature-controlled fan shown in Figure 3;
Fig. 5 is the temperature control curve schematic representation of temperature-controlled fan shown in Figure 3;
Fig. 6 is the embodiment's of the utility model temperature-controlled fan a circuit diagram.
Embodiment
See also Fig. 3, temperature-controlled fan 100 of the present utility model comprises temperature measurement circuit 110, comparison circuit 120, rotating-speed control circuit 130 and fan (figure does not show).Wherein, the output terminal of temperature measurement circuit 110 is connected to the first input end of comparison circuit 120, second input end input reference electrical signal of comparison circuit 120, and the output terminal of comparison circuit 120 is connected to the input end of rotating-speed control circuit 130.Temperature measurement circuit 110 is used for sense ambient temperature and generates the control electrical signal according to ambient temperature; Comparison circuit 120 is used for more described control electrical signal and reference electrical signal, and produces the output electrical signal that outputs to rotating-speed control circuit; Rotating-speed control circuit 130 is used for adjusting according to described output electrical signal the rotating speed of fan.
Temperature measurement circuit 110 comprises that temperature transducer 111 and control electrical signal produce circuit 112; Described temperature transducer 111 induced environment temperature, described control electrical signal produce circuit 112 produces correspondence according to the induction of temperature transducer 111 control electrical signal.
Comparison circuit 120 comprises that comparator 121 and reference electrical signal produce circuit 122, and the output terminal of described reference electrical signal generation circuit 122 is connected to second input end of comparator 121.
Rotating-speed control circuit 130 comprises control unit 131, driver element 132 and fan propeller angle inducting cell 133; Described control unit 131 produces drive signal and is input to driver element 132 according to the output electrical signal of comparison circuit 120; Described driver element 132 generally is installed on the stator (figure does not show) of fan, produces electromagnetic force, the rotor motion of drive fan according to this drive signal; The angle of described fan propeller angle inducting cell 133 induction fan propellers passes to control unit 131 by the signal with rotor angle, makes the electromagnetic force commutation that produces on control unit 131 control drive unit 132, thereby keeps fan to rotate continuously.
See also Fig. 4, introduce the operation workflow of the utility model temperature-controlled fan below.
At first, temperature measurement circuit 110 is with ambient temperature signal T
aBe converted into the needed voltage signal V of control fan
tPass to comparison circuit 120;
Secondly, comparison circuit 120 is according to voltage V
tJudge ambient temperature and output voltage V
cTo rotating-speed control circuit 130; Wherein, when judging ambient temperature T
a＜T
MinThe time, V
c=V
0, work as T
a＞T
MinThe time, V
c=V
tV
0Referring to and making rotation speed of the fan is 0 o'clock magnitude of voltage, by adjusting circuit parameter, can make V
0=0V;
Subsequently, rotating-speed control circuit 130 is according to V
cControl rotation speed of the fan.
Seeing also Fig. 5, is the temperature control curve of the utility model temperature-controlled fan.Wherein, when ambient temperature less than T
MinThe time, because V
c=V
0, so rotation speed of the fan is 0; When ambient temperature is higher than T
MinLess than T
MaxThe time, because V
c=V
t, rotation speed of the fan is at S
MinTo S
MaxBetween according in advance setting linear change; When ambient temperature is higher than T
MaxThe time, rotation speed of the fan is stabilized in maximum speed S
Max
Seeing also Fig. 6, is an embodiment's of the present utility model circuit diagram.
Wherein, the bleeder circuit that temperature measurement circuit 110 is made up of thermistor Rt and fixed value resistance R0, thereby the variation of the Rt test environment variation of temperature value of having a resistance, the voltage V at the dividing point place of thermistor Rt and fixed value resistance R0
tChange thereupon.
The negative-phase input of the comparator of comparison circuit 120 is connected to the dividing point of thermistor Rt and fixed value resistance R0, and the normal phase input end of comparator is used to import the reference electrical signal that reference electrical signal produces circuit.
This reference electrical signal produces circuit and adopts the bleeder circuit of being made up of 2 fixed value resistance R1 and R2, the voltage V of dividing point
bEqual to work as T
a=T
MinThe time V
tValue.
Because V
tAnd V
bBe connected respectively to 2 pins of comparator, work as V
t＞V
bThe time, the output V of comparison circuit 120
c=V
t, work as V
t＜V
bThe time, V
c=V
0
Rotating-speed control circuit 130 is identical with the control circuit of traditional temperature-controlled fan, adopts the control chip of chip LB11961 as fan, and the setting by circuit parameter makes input voltage V
c=V
0The time, rotation speed of the fan is 0.
Rotating-speed control circuit 130 also comprises the ATS266 chip, the ATS266 chip serves as fan propeller angle inducting cell, be used to respond to the fan propeller angle of (figure does not show), pass to the LB11961 chip by signal with rotor angle, make of the electromagnetic force commutation of LB11961 chip controls, thereby keep fan to rotate continuously as the last generation of coil L1, L2 of driver element; Simultaneously the Control of Voltage of LB11961 chip by the Vin pin be in the frequency of the square-wave voltage of Out1, the output of Out2 pin, is equivalent to control the frequency of the energising of L1, L2 coil, realizes the control of rotor speed.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. temperature-controlled fan comprises rotating-speed control circuit, is used for sense ambient temperature and generates the temperature measurement circuit of control electrical signal according to ambient temperature; It is characterized in that: also comprise comparison circuit; The output terminal of described temperature measurement circuit is connected to the first input end of comparison circuit, second input end input reference electrical signal of described comparison circuit, and the output terminal of described comparison circuit is connected to the input end of rotating-speed control circuit; Described comparison circuit relatively should be controlled electrical signal and reference electrical signal, and produced the output electrical signal that outputs to rotating-speed control circuit; Described rotating-speed control circuit is adjusted the rotating speed of fan according to described output electrical signal.
2. temperature-controlled fan according to claim 1 is characterized in that: described comparison circuit comprises that comparator and reference electrical signal produce circuit, and the output terminal of described reference electrical signal generation circuit is connected to second input end of comparator.
3. temperature-controlled fan according to claim 2 is characterized in that: it is bleeder circuit that described reference electrical signal produces circuit, and its output terminal is the dividing point of bleeder circuit.
4. temperature-controlled fan according to claim 1 is characterized in that: described temperature measurement circuit comprises that temperature transducer and control electrical signal produce circuit; Described temperature sensor senses ambient temperature, described control electrical signal produce circuit produces correspondence according to the induction of temperature transducer control electrical signal.
5. temperature-controlled fan according to claim 1, it is characterized in that: described temperature measurement circuit comprises the bleeder circuit that thermistor and fixed value resistance are formed, the resistance of described thermistor changes with the variation of ambient temperature, and the voltage at the dividing point place of described thermistor and fixed value resistance forms the control electrical signal thereupon changing.
6. temperature-controlled fan according to claim 1 is characterized in that: described rotating-speed control circuit comprises control unit, driver element and fan propeller angle inducting cell; Described control unit produces drive signal and is input to driver element according to the output electrical signal of comparison circuit, described driver element is according to this drive fan propeller motion, and described fan propeller angle inducting cell is input to control unit with the fan propeller angle signal.
7. temperature-controlled fan according to claim 6 is characterized in that: described control unit adopts chip LB11961; Described driver element adopts control coil; Described fan propeller angle inducting cell adopts chip ATS266.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096513 CN2731151Y (en) | 2004-09-29 | 2004-09-29 | Temperature controlled fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096513 CN2731151Y (en) | 2004-09-29 | 2004-09-29 | Temperature controlled fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2731151Y true CN2731151Y (en) | 2005-10-05 |
Family
ID=35051487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420096513 Expired - Lifetime CN2731151Y (en) | 2004-09-29 | 2004-09-29 | Temperature controlled fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2731151Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7541762B2 (en) | 2006-10-18 | 2009-06-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Control circuit for a fan |
| CN101154112B (en) * | 2006-09-30 | 2011-01-12 | 台达电子工业股份有限公司 | Fan system and its control device |
| CN102169354A (en) * | 2011-02-17 | 2011-08-31 | 浪潮(北京)电子信息产业有限公司 | Control method and device of cooling system |
| CN104142721A (en) * | 2013-11-05 | 2014-11-12 | 上海仪电物联技术股份有限公司 | Intelligent control method for fan of digital video recorder |
| CN106525234A (en) * | 2016-12-08 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Multi-wing shaped deuterium lamp UV light source |
| CN114382715A (en) * | 2020-10-20 | 2022-04-22 | 南京绿芯集成电路有限公司 | Fan control device with power-saving mode and start delay setting |
-
2004
- 2004-09-29 CN CN 200420096513 patent/CN2731151Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154112B (en) * | 2006-09-30 | 2011-01-12 | 台达电子工业股份有限公司 | Fan system and its control device |
| US7541762B2 (en) | 2006-10-18 | 2009-06-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Control circuit for a fan |
| CN101165354B (en) * | 2006-10-18 | 2011-01-05 | 鸿富锦精密工业（深圳）有限公司 | Fan rotation speed automatic control circuit |
| CN102169354A (en) * | 2011-02-17 | 2011-08-31 | 浪潮(北京)电子信息产业有限公司 | Control method and device of cooling system |
| CN104142721A (en) * | 2013-11-05 | 2014-11-12 | 上海仪电物联技术股份有限公司 | Intelligent control method for fan of digital video recorder |
| CN106525234A (en) * | 2016-12-08 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Multi-wing shaped deuterium lamp UV light source |
| CN114382715A (en) * | 2020-10-20 | 2022-04-22 | 南京绿芯集成电路有限公司 | Fan control device with power-saving mode and start delay setting |
| CN114382715B (en) * | 2020-10-20 | 2024-01-12 | 南京绿芯集成电路有限公司 | Fan control device with power saving mode and start delay setting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140929 Granted publication date: 20051005 |