CN102748311B - The controlling method of rotation speed of the fan - Google Patents
The controlling method of rotation speed of the fan Download PDFInfo
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- CN102748311B CN102748311B CN201110100314.5A CN201110100314A CN102748311B CN 102748311 B CN102748311 B CN 102748311B CN 201110100314 A CN201110100314 A CN 201110100314A CN 102748311 B CN102748311 B CN 102748311B
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Abstract
A controlling method for rotation speed of the fan, in order to control the running of tandem fan group.This controlling method comprises the following steps: obtain controlling elements; Judge whether controlling elements are less than a first threshold; If controlling elements are less than first threshold, then perform one first rate-determining steps; If controlling elements are greater than first threshold, then judge whether controlling elements are greater than a Second Threshold; If controlling elements are greater than Second Threshold, then perform one second rate-determining steps; And, if controlling elements are less than Second Threshold, then perform one the 3rd rate-determining steps.
Description
Technical field
The present invention relates to a kind of controlling method of rotation speed of the fan, particularly relate to a kind of controlling method of rotation speed of the fan of tandem fan group.
Background technique
Due to the data processing amount increase of electronic equipment and the lifting of processing rate, then be aided with the universal of integrated technique, make electronic equipment can hold more electronic component, thus make the heat radiation of electronic equipment become more and more important.Radiating mode main at present utilizes fan to force to increase cross-ventilation to suppress the rising of temperature in electronic equipment, to reach the effect of heat radiation.
The control mode that existing fan is conventional, mainly utilizes the mode of restriction rotation speed of the fan, makes fan under fixed voltage or Width funtion, can obtain the lifting in characteristic, do not burnt to protect original control circuit.And when fan is connected, the rotating speed being placed in the fan (fan of air opening end) of rear end can improve rotating speed because the fan of front end drives.But, adopt the control mode of restriction rotation speed of the fan, when fan is connected, fan (fan of the air opening end) rotating speed being placed in rear end can be made to be restricted, the fan overall permanence of series connection is deteriorated, preferably heat dissipation potential cannot be reached.At present, meeting that the fan of connecting on the market has remove be placed in rear end fan on the control of speed limit, so this method difficulty that can increase batch mixing or produce, moreover, because user may be anti-loaded by fan because not knowing to differentiate the front and back of tandem fan, it is made to be effective.
Therefore, how a kind of controlling method of rotation speed of the fan is provided, the method of Discrete control can be utilized, make fan under different operating interval or varying environment, take different controlling methods, and then make tandem fan group play maximum usefulness, and avoid the too high control circuit that causes of power to be burnt, become one of important topic.
Summary of the invention
Because above-mentioned problem, object of the present invention according to controlling elements, and can carry out the controlling method of the rotation speed of the fan of Discrete control for providing one.
Another object of the present invention, for providing a kind of controlling method of rotation speed of the fan, avoids the too high control circuit that causes of power to be burnt.
For achieving the above object, according to the controlling method of a kind of rotation speed of the fan of the present invention, in order to control the running of tandem fan group.Controlling method comprises the following steps: obtain controlling elements; Judge whether controlling elements are less than a first threshold; If controlling elements are less than first threshold, then perform one first rate-determining steps; If controlling elements are greater than first threshold, then judge whether controlling elements are greater than a Second Threshold; If controlling elements are greater than Second Threshold, then perform one second rate-determining steps; And, if controlling elements are less than Second Threshold, then perform one the 3rd rate-determining steps.
In a preferred embodiment of the present invention, tandem fan group has one first fan and one second fan, and the first fan and the second fan are connected in series in structure.Controlling elements can be magnitude of voltage, current value or performance number.First threshold and Second Threshold can be magnitude of voltage, current value or performance number.First threshold can be lower limit, and Second Threshold can be CLV ceiling limit value.First rate-determining steps is the rotating speed of the tandem fan group that lifts restrictions (the first fan and the second fan), first rate-determining steps, by leaf design, removes speed limit to make the controlling elements of the first fan and the second fan be connected in series when being less than first threshold.Second rate-determining steps is the power of restriction tandem fan group.3rd rate-determining steps is the rotating speed of restriction tandem fan group.
In a preferred embodiment of the present invention, obtaining controlling elements is obtain controlling elements by reading, measurement or calculation method.Wherein, when controlling elements be magnitude of voltage or current value time, controlling elements can by reading or measurement mode obtain; When controlling elements are performance number, controlling elements by reading or can measure magnitude of voltage and/or current value, then obtain with the product of calculating voltage value and current value or magnitude of voltage and resistance value or current value and resistance value.Controlling method can hardware or firmware realize, and wherein hardware can realize by a logical circuit.
From the above, the controlling method of rotation speed of the fan of the present invention carries out Discrete control by according to controlling elements, by obtaining controlling elements and comparing, to determine execution first rate-determining steps, the second rate-determining steps or the 3rd rate-determining steps with the first threshold (lower limit) preset and Second Threshold (CLV ceiling limit value).If the controlling elements obtained are less than first threshold (being less than lower limit), then perform the first rate-determining steps.If the controlling elements obtained are greater than Second Threshold (being greater than CLV ceiling limit value), then perform the second rate-determining steps.If the controlling elements obtained are greater than first threshold and be less than Second Threshold (between lower limit and CLV ceiling limit value), then perform the 3rd rate-determining steps.Fan, under different operating interval or varying environment, is taked different controlling methods, and then is made tandem fan group reach preferably usefulness, and avoid the too high control circuit that causes of power to be burnt.
Accompanying drawing explanation
Figure 1A is the schematic diagram of a kind of rotation speed of the fan control module according to present pre-ferred embodiments.
Figure 1B is the flow chart of the controlling method of a kind of rotation speed of the fan of present pre-ferred embodiments.
Fig. 2 A be in a preferred embodiment of the present invention single fan when the 3rd rate-determining steps and the blast of original single fan-air quantity characteristic comparison diagram.
Fig. 2 B be in a preferred embodiment of the present invention tandem fan group when the first rate-determining steps and the blast of original tandem fan group-air quantity characteristic comparison diagram.
Fig. 2 C be in a preferred embodiment of the present invention single fan under Width funtion, when taking the second rate-determining steps and the characteristic of the blast-air quantity of original single fan and power consumpiton comparison diagram.
Reference numeral explanation
1: control module 11: fan control unit
12: comparing unit 13: signal feedback unit
14: driver element 2: tandem fan group
21: the first fan 22: the second fans
S10 ~ S60: step
Embodiment
Hereinafter with reference to relevant drawings, the controlling method of a kind of rotation speed of the fan according to present pre-ferred embodiments is described, wherein identical element is illustrated with identical reference marks.
Please refer to Figure 1A, it is the schematic diagram of a kind of rotation speed of the fan control module according to present pre-ferred embodiments.The controlling method of rotation speed of the fan of the present invention is in order to control the running of a tandem fan group 2; Wherein, tandem fan group 2 has one first fan 21 and one second fan 22, and certain tandem fan group 2 also can have the fan of more than two, and fan is connected in series in structure.
As shown in Figure 1A, control module 1 comprises fan control unit 11, comparing unit 12, signal feedback unit 13 and a driver element 14.
Fan control unit 11 is electrically connected with driver element 14 and comparing unit 12 respectively.In addition, signal feedback unit 13 is electrically connected driver element 14 and comparing unit 12.The signal that driver element 14 is exported by fan control unit 11 determines the controlling method of tandem fan group 2.
Referring to Figure 1A and Figure 1B, Figure 1B is the flow chart of the controlling method of a kind of rotation speed of the fan of present pre-ferred embodiments, and controlling method comprises step S10 to step S60.
First, in step S10, obtain controlling elements, wherein obtain controlling elements and can obtain controlling elements by reading, measurement or calculation method.In the present embodiment, controlling elements are such as magnitude of voltage, current value or performance number.Controlling elements directly by reading (or measurement) current value or magnitude of voltage in signal feedback unit 13, or can calculate performance number by the current value read and/or magnitude of voltage.
Then, in step S20, judge whether controlling elements are less than a first threshold.In the present embodiment, first threshold is such as magnitude of voltage, current value or performance number, and first threshold is pre-set in comparing unit 12 as comparison reference (such as lower limit) according to different fan specifications.In addition, first threshold is the controlling elements that obtain of correspondence and sets, for example, if controlling elements acquired in step S10 are magnitude of voltage, the first threshold then preset is magnitude of voltage, and after comparing size via comparing unit 12, comparative result is inputted fan control unit 11.In like manner, if controlling elements acquired in step S10 are current value, then the first threshold preset is current value, and the rest may be inferred, does not repeat in this.
If in step S20, judged result is yes, and namely controlling elements are less than first threshold, then carry out step S30, performs one first rate-determining steps.In the present embodiment, after fan control unit 11 receives the signal of comparing unit 12, by the control signal input queued switches unit 14 of its correspondence, then can drive tandem fan group 2 via driver element 14.In this, the first rate-determining steps is the lift restrictions rotating speed of tandem fan group 2 that is the rotating speed of lift restrictions the first fan 21 and the second fan 22.First rate-determining steps, by leaf design, to make the controlling elements of the tandem fan group 2 (first fan 21 and the second fan 22) be connected in series remove speed limit when being less than first threshold, and then improves the characteristic of tandem fan group 2.
But if in step S20, judged result is no, and namely controlling elements are greater than first threshold, then carry out step S40, judges whether controlling elements are greater than a Second Threshold.In the present embodiment, Second Threshold can be magnitude of voltage, current value or performance number, and Second Threshold is pre-set in comparing unit 12 as comparison reference (such as CLV ceiling limit value) according to different fan specifications.In addition, the Second Threshold controlling elements that obtain of correspondence and setting, for example, if controlling elements acquired in step S10 are magnitude of voltage, the Second Threshold then preset is magnitude of voltage, and after comparing size via comparing unit 12, comparative result is inputted fan control unit 11.In like manner, if controlling elements acquired in step S10 are current value, then the Second Threshold preset is current value, and the rest may be inferred, does not repeat in this.
If in step S40, judged result is yes, and namely controlling elements are greater than Second Threshold, then carry out step S50, performs one second rate-determining steps.In the present embodiment, after fan control unit 11 receives the signal of comparing unit 12, by the control signal input queued switches unit 14 of its correspondence, then can drive tandem fan group 2 via driver element 14.In this, the second rate-determining steps is the power of restriction tandem fan group 2, that is the power of restriction the first fan 21 and the second fan 22.It should be noted that; due under Width funtion; voltage raising can accelerate the rotating speed of fan; and power consumpiton also rises thereupon; therefore, utilize the controlling method of power-limiting, fan power consumption can be made to maintain a definite limitation; with the system of protective circuit plate and use, avoid too high power consumpiton to cause the damage of system or fan simultaneously.
But if in step S40, judged result is no, and namely controlling elements are less than Second Threshold, then carry out step S60, perform one the 3rd rate-determining steps.In the present embodiment, after fan control unit 11 receives the signal of comparing unit 12, by the control signal input queued switches unit 14 of its correspondence, then can drive tandem fan group 2 via driver element 14.In this, the 3rd rate-determining steps is the rotating speed of restriction tandem fan group 2, that is the rotating speed of restriction the first fan 21 and the second fan 22, in order to limit the maximum speed of the first fan 21 and the second fan 22, is obviously better than original general circuit design to make control panel.
It should be noted that in the present embodiment, controlling method realizes with hardware or firmware, and wherein hardware can realize by a logical circuit.For example, fan control unit 11 can be the chip had with this controlling method, in the result input fan control unit 11 compared via comparing unit 12, control tandem fan group 2 (first fan 21 and the second fan 22) by fan control unit 11 and perform corresponding rate-determining steps, to reach the effect of Discrete control.
As previously mentioned, in a preferred embodiment of the present invention, controlling elements directly by after (or measurement) current value of reading in signal feedback unit 13 and magnitude of voltage, then calculate corresponding performance number.And in comparing unit 12, preset first threshold value and Second Threshold, now first threshold and Second Threshold are all performance number.Therefore, when tandem fan group 2 starts, fan control unit 11 can dynamically according to the change of controlling elements, output signal is to driver element 14, control fan series connection group 2 to perform different rate-determining steps by driver element 14 again, all reach preferably usefulness to make each fan in tandem fan group 2.
Please refer to shown in Fig. 2 A, its be in a preferred embodiment of the present invention single fan when the 3rd rate-determining steps and the blast of original single fan-air quantity characteristic comparison diagram.As seen from the figure, compared with the characteristic of original single fan, in control panel, via the design of restriction first fan 21 and the second fan 22 maximum speed, be obviously better than the characteristic of original single fan.
Please refer to shown in Fig. 2 B, its be in a preferred embodiment of the present invention tandem fan group when the first rate-determining steps and the blast of original tandem fan group-air quantity characteristic comparison diagram.As seen from the figure, compared with the characteristic of original tandem fan group 2, in control panel, because of by leaf design, make the controlling elements of the first fan 21 and the second fan 22 be connected in series remove speed limit when being less than first threshold, and then improve the characteristic of tandem fan group 2.
Please refer to shown in Fig. 2 C, its be in a preferred embodiment of the present invention single fan under Width funtion, when taking the second rate-determining steps and the characteristic of the blast-air quantity of original single fan and power consumpiton comparison diagram.As seen from the figure, compared with the characteristic of original single fan, when voltage is 48V and 75V, via the power of restriction first fan 21 and the second fan 22, be obviously better than the characteristic of original single fan.Moreover with power consumpiton, take voltage as 75V be example, the amplitude of fluctuation of the power consumpiton of original single fan can have 20 watts to change to 45 watts.But the single fan controlled via the second rate-determining steps, the amplitude of fluctuation of its power consumpiton only has 20 watts to change to 30 watts, when representing execution the second rate-determining steps, too high power consumpiton really can be avoided to cause the damage of system or fan.
In sum, the controlling method of rotation speed of the fan of the present invention carries out Discrete control by according to controlling elements, by obtaining controlling elements and comparing, to determine execution first rate-determining steps, the second rate-determining steps or the 3rd rate-determining steps with the first threshold (lower limit) preset and Second Threshold (CLV ceiling limit value).If the controlling elements obtained are less than first threshold (being less than lower limit), then perform the first rate-determining steps.If the controlling elements obtained are greater than Second Threshold (being greater than CLV ceiling limit value), then perform the second rate-determining steps.If the controlling elements obtained are greater than first threshold and be less than Second Threshold (between lower limit and CLV ceiling limit value), then perform the 3rd rate-determining steps.Fan, under different operating interval or varying environment, is taked different controlling methods, and then is made tandem fan group reach preferably usefulness, and avoid the too high control circuit that causes of power to be burnt.
The foregoing is only citing, but not be limitation of the present invention.Anyly do not depart from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be contained in claim of the present invention.
Claims (6)
1. a controlling method for rotation speed of the fan, in order to control the running of tandem fan group, this controlling method sequentially comprises step:
A. controlling elements are obtained;
B. judge whether these controlling elements are less than a first threshold;
If c. these controlling elements are less than this first threshold, then perform one first rate-determining steps;
If d. these controlling elements are greater than this first threshold, then judge whether these controlling elements are greater than a Second Threshold;
If these controlling elements are greater than this Second Threshold, then perform one second rate-determining steps; And
If these controlling elements are less than this Second Threshold, then perform one the 3rd rate-determining steps,
Wherein these controlling elements are magnitude of voltage, current value or performance number, and this step obtaining these controlling elements obtains this controlling elements by reading, measurement or calculation method,
Wherein this first rate-determining steps is the rotating speed of this tandem fan group of lifting restrictions,
Wherein this second rate-determining steps is the power limiting this tandem fan group,
Wherein the 3rd rate-determining steps is the rotating speed limiting this tandem fan group.
2. controlling method as claimed in claim 1, wherein this tandem fan group has one first fan and one second fan, and this first fan and this second fan are connected in series in structure.
3. controlling method as claimed in claim 1 or 2, wherein this first threshold and this Second Threshold are magnitude of voltage, current value or performance number.
4. controlling method as claimed in claim 1 or 2, wherein this first threshold is lower limit, and this Second Threshold is CLV ceiling limit value.
5. controlling method as claimed in claim 1, wherein this first rate-determining steps is by leaf design, removes speed limit to make the controlling elements of this tandem fan group be connected in series when being less than this first threshold.
6. controlling method as claimed in claim 1 or 2, wherein this controlling method realizes with hardware or firmware, and wherein this hardware realizes with a logical circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110100314.5A CN102748311B (en) | 2011-04-21 | 2011-04-21 | The controlling method of rotation speed of the fan |
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| CN201110100314.5A CN102748311B (en) | 2011-04-21 | 2011-04-21 | The controlling method of rotation speed of the fan |
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| CN102748311A CN102748311A (en) | 2012-10-24 |
| CN102748311B true CN102748311B (en) | 2015-09-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105650022B (en) * | 2016-03-29 | 2017-09-22 | 海信集团有限公司 | A kind of fan rotational frequency control method and fan rotation speed control apparatus |
| CN108150979B (en) * | 2016-12-06 | 2020-02-18 | 通用电气照明解决方案有限公司 | LED lamp, method and system for controlling fan rotating speed of LED lamp |
| CN109031865B (en) * | 2018-09-07 | 2020-05-05 | 苏州佳世达光电有限公司 | Fan installation direction detection assembly and projector |
| CN110566492A (en) * | 2019-09-12 | 2019-12-13 | 苏州浪潮智能科技有限公司 | fan speed regulation method, device, equipment and medium |
| CN111255726B (en) * | 2020-03-03 | 2022-03-25 | 上海度普新能源科技有限公司 | Fan control method and device |
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| CN1758171A (en) * | 2004-10-10 | 2006-04-12 | 仁宝电脑工业股份有限公司 | Method for automatic fine regulating rotation speed of heat radiation fan |
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