CN102748311A - Control method for rotating speed of fan - Google Patents
Control method for rotating speed of fan Download PDFInfo
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- CN102748311A CN102748311A CN2011101003145A CN201110100314A CN102748311A CN 102748311 A CN102748311 A CN 102748311A CN 2011101003145 A CN2011101003145 A CN 2011101003145A CN 201110100314 A CN201110100314 A CN 201110100314A CN 102748311 A CN102748311 A CN 102748311A
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Abstract
The invention discloses a control method for the rotating speed of a fan. The control method is used for controlling the operation of a serial fan group. The control method comprises the following steps of: obtaining a control factor; judging whether the control factor is smaller than a first threshold or not; if the control factor is smaller than the first threshold, executing the first control step; if the control factor is greater than the first threshold, judging whether the control factor is greater than a second threshold or not; if the control factor is greater than the second threshold, executing the second control step; and if the control factor is smaller than the second threshold, executing the third control step.
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
Because the data processing amount of electronic equipment increases and the lifting of processing rate, is aided with popularizing of integrated technology again, makes electronic equipment can hold more electronic component, thereby the heat radiation of electronic equipment is become more and more important.Main radiating mode is to utilize fan to force to increase the rising that cross-ventilation suppresses temperature in the electronic equipment at present, to reach the effect of heat radiation.
The control mode that existing fan is commonly used mainly is a mode of utilizing the restriction rotation speed of the fan, makes fan under fixed voltage or wide voltage, obtain the lifting on the characteristic, is not burnt to protect original control circuit.And when fan is connected, place the rotating speed of the fan (fan of air opening end) of rear end to improve rotating speed because of the fan of front end drives.Yet, adopt the control mode that limits rotation speed of the fan, when fan is connected, can make fan (fan of the air opening end) rotating speed that places the rear end be restricted, make the fan overall permanence variation of series connection, can't reach preferable heat dissipation potential.At present; The control of speed limit on the fan that places the rear end is removed in the meeting that the fan of connecting on the market has, and so this method can increase the difficulty in batch mixing or the production, moreover; Because the user possibly know the front and back of differentiating tandem fan because of meeting fan is not adorned instead, it can't be effective.
Therefore; How a kind of controlling method of rotation speed of the fan is provided, can utilizes the method for segmentation control, make fan under different operating interval or varying environment; Take the Different control method; And then make the maximum usefulness of tandem fan group performance, 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, the object of the invention for provide a kind of can be according to controlling elements, and can carry out the controlling method of the rotation speed of the fan that segmentation controls.
Another object of the present invention is the controlling method that a kind of rotation speed of the fan is provided, and 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 the running of control tandem fan group.Controlling method may further comprise the steps: obtain controlling elements; Judge that whether controlling elements are less than a first threshold; If controlling elements less than first threshold, are then carried out one first control step; If controlling elements greater than first threshold, judge that then whether controlling elements are greater than one second threshold value; If controlling elements greater than second threshold value, are then carried out one second control step; And, if controlling elements less than second threshold value, are then carried out one the 3rd control step.
In the present invention's one preferred embodiment, the tandem fan group has one first fan and one second fan, and first fan and second fan are connected in series on structure.Controlling elements can be magnitude of voltage, current value or performance number.The first threshold and second threshold value can be magnitude of voltage, current value or performance number.First threshold can be lower limit, and second threshold value can be CLV ceiling limit value.First control step is the rotating speed of tandem fan group (first fan and second fan) that lift restrictions, and first control step can be through leaf design, so that the controlling elements of first fan that is connected in series and second fan are removed speed limit less than first threshold the time.Second control step is the power of restriction tandem fan group.The 3rd control step is the rotating speed of restriction tandem fan group.
In the present invention's one preferred embodiment, obtain controlling elements and be by read, measurement or the controlled factor of calculation method.Wherein, when controlling elements were magnitude of voltage or current value, controlling elements can be by reading or the measurement mode obtains; When controlling elements were performance number, controlling elements can be by reading or measure magnitude of voltage and/or current value, again with the product of calculating voltage value and current value or magnitude of voltage and resistance value or current value and resistance value and obtain.Controlling method can hardware or firmware realize that wherein hardware can be realized by a logical circuit.
Hold the above; The controlling method of rotation speed of the fan of the present invention is by carry out segmentation control according to controlling elements; By obtaining controlling elements and comparing, carry out first control step, second control step or the 3rd control step with decision with presetting first threshold (lower limit) and second threshold value (CLV ceiling limit value).If the controlling elements that obtain are then carried out first control step less than first threshold (less than lower limit).If the controlling elements that obtain are then carried out second control step greater than second threshold value (greater than CLV ceiling limit value).If the controlling elements that obtain are then carried out the 3rd control step greater than first threshold and less than second threshold value (between lower limit and CLV ceiling limit value).Fan is taked the Different control method under different operating interval or varying environment, and then makes the tandem fan group reach preferable usefulness, and avoids the too high control circuit that causes of power to be burnt.
Description of drawings
Figure 1A is the schematic representation according to a kind of rotation speed of the fan control module of preferred embodiment of the present invention.
Figure 1B is the flow chart of the controlling method of a kind of rotation speed of the fan of preferred embodiment of the present invention.
Fig. 2 A for single fan in the present invention's one preferred embodiment when the 3rd control step and the blast of original single fan-air quantity characteristic comparison diagram.
Fig. 2 B for tandem fan group in the present invention's one preferred embodiment when first control step and the blast of original tandem fan group-air quantity characteristic comparison diagram.
Fig. 2 C for single fan in the present invention's one preferred embodiment under wide voltage, when taking second control step and the characteristic of the blast-air quantity of original single fan and power consumpiton comparison diagram.
The reference numeral explanation
1: control module 11: fan control unit
12: comparing unit 13: signal back coupling unit
14: driver element 2: the tandem fan group
22: the second fans of 21: the first fans
S10～S60: step
Embodiment
Below will the controlling method according to a kind of rotation speed of the fan of preferred embodiment of the present invention be described with reference to relevant drawings, wherein components identical will be explained with identical reference marks.
Please with reference to Figure 1A, it is the schematic representation according to a kind of rotation speed of the fan control module of preferred embodiment of the present invention.The controlling method of rotation speed of the fan of the present invention is in order to control the running of a series connection fans 2; Wherein, tandem fan group 2 has one first fan 21 and one second fan 22, and tandem fan group 2 also can have the fan more than two certainly, and fan is connected in series on structure.
Shown in Figure 1A, control module 1 comprises that a fan control unit 11, a comparing unit 12, a signal feedback a unit 13 and a driver element 14.
Please be simultaneously with reference 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 preferred embodiment of the present invention, controlling method comprises that step S10 is to step S60.
At first, in step S10, obtain controlling elements, wherein obtain controlling elements can by read, measurement or the controlled factor of calculation method.In the present embodiment, controlling elements for example are magnitude of voltage, current value or performance number.Controlling elements can be directly feedback by signal and are read (or measurement) current value or magnitude of voltage in the unit 13, or calculate performance number by current value that reads and/or magnitude of voltage.
Then, in step S20, judge that whether controlling elements are less than a first threshold.In the present embodiment, first threshold for example is magnitude of voltage, current value or performance number, and first threshold is pre-set in the comparing unit 12 as comparison reference (for example lower limit) according to different fan specifications.In addition, first threshold is the controlling elements that obtain of correspondence and setting, for instance; If the controlling elements that in step S10, obtained are magnitude of voltage; Then predefined first threshold is magnitude of voltage, and via after the comparing unit 12 comparison sizes, comparative result is imported fan control unit 11.In like manner, if the controlling elements that in step S10, obtained are current value, then predefined first threshold is current value, and the rest may be inferred, do not give unnecessary details in this.
If in step S20, judged result is for being that promptly controlling elements are then carried out step S30 less than first threshold, carry out one first control step.In the present embodiment, after fan control unit 11 received the signal of comparing unit 12, pilot signal input driver element 14 that can it is corresponding then drove tandem fan group 2 via driver element 14.In this, first control step is the rotating speed of tandem fan group 2 that lifts restrictions, that is the rotating speed of lift restrictions first fan 21 and second fan 22.First control step can be through leaf design, so that the controlling elements of the tandem fan group 2 that is connected in series (first fan 21 and second fan 22) are removed speed limit less than first threshold the time, and then improves the characteristic of tandem fan group 2.
Yet if in step S20, judged result is that promptly controlling elements are not carried out step S40 greater than first threshold, judge that whether controlling elements are greater than one second threshold value.In the present embodiment, second threshold value can be magnitude of voltage, current value or performance number, and second threshold value is pre-set in the comparing unit 12 as comparison reference (for example CLV ceiling limit value) according to different fan specifications.In addition, controlling elements that the second threshold value correspondence obtains and setting, for instance; If the controlling elements that in step S10, obtained are magnitude of voltage; Then predefined second threshold value is magnitude of voltage, and via after the comparing unit 12 comparison sizes, comparative result is imported fan control unit 11.In like manner, if the controlling elements that in step S10, obtained are current value, then predefined second threshold value is current value, and the rest may be inferred, do not give unnecessary details in this.
If in step S40, judged result is for being that promptly controlling elements are then carried out step S50 greater than second threshold value, carry out one second control step.In the present embodiment, after fan control unit 11 received the signal of comparing unit 12, pilot signal input driver element 14 that can it is corresponding then drove tandem fan group 2 via driver element 14.In this, second control step is the power of restriction tandem fan group 2, that is limits the power of first fan 21 and second fan 22.It should be noted that because under wide voltage, voltage improves the rotating speed that can quicken fan; And power consumpiton also rises thereupon; Therefore, utilize the controlling method of power-limiting, can make fan power consumption maintain certain limitation; With the system of protective circuit plate and use, avoid too high power consumpiton to cause the damage of system or fan simultaneously.
Yet if in step S40, judged result is that promptly controlling elements are not carried out step S60 less than second threshold value, carry out one the 3rd control step.In the present embodiment, after fan control unit 11 received the signal of comparing unit 12, pilot signal input driver element 14 that can it is corresponding then drove tandem fan group 2 via driver element 14.In this, the 3rd control step is the rotating speed of restriction tandem fan group 2, that is limits the rotating speed of first fan 21 and second fan 22, in order to limit the maximum speed of first fan 21 and second fan 22, so that the control panel obviously is superior to original general circuit design.
It should be noted that in the present embodiment controlling method is to realize with hardware or firmware, wherein hardware can be realized by a logical circuit.For instance; Fan control unit 11 can be the chip that has with this controlling method; Result relatively imports in the fan control unit 11 via comparing unit 12; Carry out corresponding control step by fan control unit 11 control tandem fan groups 2 (first fan 21 and second fans 22), to reach the effect of segmentation control.
As previously mentioned, in the present invention's one preferred embodiment, controlling elements directly by after reading (or measurement) current value and magnitude of voltage in the signal back coupling unit 13, calculate corresponding performance number again.And in comparing unit 12, the preset first threshold value and second threshold value, this moment, the first threshold and second threshold value were all performance number.Therefore; When tandem fan group 2 starts; Fan control unit 11 can be accordinged to the variation of controlling elements dynamically; Output signal to driver element 14 is controlled fan series 2 to carry out the Different control step, so that each fan in the tandem fan group 2 all reaches preferable usefulness by driver element 14 again.
Please with reference to shown in Fig. 2 A, its for single fan in the present invention's one preferred embodiment when the 3rd control step and the blast of original single fan-air quantity characteristic comparison diagram.Can know by figure, compare with the characteristic of original single fan, between the control panel in, via the design of restriction first fan 21 and second fan, 22 maximum speeds, obviously be superior to the characteristic of original single fan.
Please with reference to shown in Fig. 2 B, its for tandem fan group in the present invention's one preferred embodiment when first control step and the blast of original tandem fan group-air quantity characteristic comparison diagram.Can know by figure; Compare with the characteristic of original tandem fan group 2, between the control panel in, because of through leaf design; Make first fan 21 that is connected in series and the controlling elements of second fan 22 less than first threshold the time, remove speed limit, and then improve the characteristic of tandem fan group 2.
Please with reference to shown in Fig. 2 C, its for single fan in the present invention's one preferred embodiment under wide voltage, when taking second control step and the characteristic of the blast-air quantity of original single fan and power consumpiton comparison diagram.Can know by figure, compare, when voltage is 48V and 75V,, obviously be superior to the characteristic of original single fan via the power of restriction first fan 21 and second fan 22 with the characteristic of original single fan.Moreover, with power consumpiton, be that 75V is an example with voltage, the amplitude of fluctuation of the power consumpiton of original single fan can have 20 watts of changes to 45 watt.Yet via the single fan that second control step is controlled, the amplitude of fluctuation of its power consumpiton has only 20 watts of changes to 30 watt, when second control step is carried out in expression, can avoid too high power consumpiton to cause the damage of system or fan really.
In sum; The controlling method of rotation speed of the fan of the present invention is by carry out segmentation control according to controlling elements; By obtaining controlling elements and comparing, carry out first control step, second control step or the 3rd control step with decision with presetting first threshold (lower limit) and second threshold value (CLV ceiling limit value).If the controlling elements that obtain are then carried out first control step less than first threshold (less than lower limit).If the controlling elements that obtain are then carried out second control step greater than second threshold value (greater than CLV ceiling limit value).If the controlling elements that obtain are then carried out the 3rd control step greater than first threshold and less than second threshold value (between lower limit and CLV ceiling limit value).Fan is taked the Different control method under different operating interval or varying environment, and then makes the tandem fan group reach preferable usefulness, and avoids the too high control circuit that causes of power to be burnt.
The above is merely for example, but not is limitation of the present invention.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the claim of the present invention its equivalent modifications of carrying out or change.
Claims (10)
1. the controlling method of a rotation speed of the fan, in order to the running of control tandem fan group, this controlling method comprises step:
Obtain controlling elements;
Judge that whether these controlling elements are less than a first threshold;
If these controlling elements less than this first threshold, are then carried out one first control step;
If these controlling elements greater than this first threshold, judge that then whether these controlling elements are greater than one second threshold value;
If these controlling elements greater than this second threshold value, are then carried out one second control step; And
If these controlling elements less than this second threshold value, are then carried out one the 3rd control step.
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 on structure.
3. according to claim 1 or claim 2 controlling method, wherein these controlling elements are magnitude of voltage, current value or performance number, and this step that obtains these controlling elements be by read, measurement or calculation method obtain this controlling elements.
4. according to claim 1 or claim 2 controlling method, wherein this first threshold and this second threshold value are magnitude of voltage, current value or performance number.
5. according to claim 1 or claim 2 controlling method, wherein this first threshold is a lower limit, and this second threshold value is a CLV ceiling limit value.
6. according to claim 1 or claim 2 controlling method, wherein this first control step is the rotating speed of this tandem fan group of lifting restrictions.
7. controlling method as claimed in claim 6, wherein this first control step is through leaf design, so that the controlling elements of this tandem fan group that is connected in series are removed speed limit less than this first threshold the time.
8. according to claim 1 or claim 2 controlling method, wherein this second control step is to limit the power of this tandem fan group.
9. according to claim 1 or claim 2 controlling method, wherein the 3rd control step is to limit the rotating speed of this tandem fan group.
10. according to claim 1 or claim 2 controlling method, wherein this controlling method is to realize that with hardware or firmware wherein this hardware is to realize with a logical circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110100314.5A CN102748311B (en) | 2011-04-21 | 2011-04-21 | The controlling method of rotation speed of the fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110100314.5A CN102748311B (en) | 2011-04-21 | 2011-04-21 | The controlling method of rotation speed of the fan |
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| CN102748311A true CN102748311A (en) | 2012-10-24 |
| CN102748311B CN102748311B (en) | 2015-09-09 |
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| CN201110100314.5A Active CN102748311B (en) | 2011-04-21 | 2011-04-21 | The controlling method of rotation speed of the fan |
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| CN105650022A (en) * | 2016-03-29 | 2016-06-08 | 海信集团有限公司 | Fan rotation speed control method and device |
| CN108150979A (en) * | 2016-12-06 | 2018-06-12 | 通用电气照明解决方案有限公司 | The method and its system of the rotation speed of the fan of LED light and control LED light |
| CN109031865A (en) * | 2018-09-07 | 2018-12-18 | 苏州佳世达光电有限公司 | A kind of fan installation direction detection components 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 |
| CN111255726A (en) * | 2020-03-03 | 2020-06-09 | 上海度普新能源科技有限公司 | Fan control method and device |
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| CN102748311B (en) | 2015-09-09 |
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