CN101126392B - Fan control method and device - Google Patents
Fan control method and device Download PDFInfo
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- CN101126392B CN101126392B CN2007101614212A CN200710161421A CN101126392B CN 101126392 B CN101126392 B CN 101126392B CN 2007101614212 A CN2007101614212 A CN 2007101614212A CN 200710161421 A CN200710161421 A CN 200710161421A CN 101126392 B CN101126392 B CN 101126392B
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Abstract
The invention discloses a fan controlling means, which is used for a fan system comprising at least two fan sets and used for making one or more steps of speed regulation on the fan system, wherein, each of the fan sets at least comprises a fan and comprises the following steps: a fan set is selected to be regulated from the fan system; the speed of the fan set is regulated in a gradual way when two or more speed steps need to be regulated. The invention additionally provides a fan controlling device, which can cause the fan to effectively reduce the current shock during the operation, avoid the influence on the power supply system, reduce the noise and save the energy.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of control method for fan and device.
Background technique
Flourish along with electronic industry, electronic equipment has entered multi-functional, high performance R﹠D direction.Pursue multi-functional, high performance electronic equipment, its electronic component integration density is in continuous increase, and working power is in continuous increase.Electronic equipment the time can produce heat in work, for preventing the too high generation variety of issue of electronic equipment Yin Wendu, and the temperature in the time of on electronic equipment, all can being provided with sink and reducing electronic device works.Have characteristics such as volume is little, good heat dissipation effect because of fan,, and, adopt a plurality of fans to dispel the heat simultaneously usually for reaching the heat radiation requirement so electronic equipment adopts the fan heat radiation usually.
The mode of many employing PWM (Pulse Width Modulation, pulsewidth modulation) is controlled the running of fan at present.PWM is meant the fundamental period of output signal is fixed, and controls output power by the size of adjusting the operation cycle in the fundamental period.Suppose that the ON time of switching tube in one-period is t, the cycle is T, then the average voltage U=V at motor two ends
CcT/T=aV
CcWherein, a=t/T, a is dutycycle, V
CcBe supply voltage.The voltage at rotating speed of motor and motor two ends is proportional, and the voltage at motor two ends is directly proportional with the dutycycle of control waveform, so the speed of motor and dutycycle are proportional, and dutycycle is big more, and motor changes soon more.Also be PWM with the output voltage copped wave of current transformer be pulse,, change the numerical value and the frequency of output voltage by changing width, quantity or the distribution rule of pulse, and then the running of control fan.
A PWM controller can be controlled a plurality of fan runnings simultaneously in the prior art, and all controlled fans start simultaneously and cut out.As shown in Figure 1, Fig. 1 is the schematic representation of a kind of fan control in the prior art, this fan system is made up of a PWM controller and 6 fans, PWM controller is controlled runnings such as 6 fans open, cut out, speed governing simultaneously, running such as also promptly a plurality of at one time fans open simultaneously, cut out, speed governing.For example shown in Fig. 1, in the clock cycle is 1,3,6 places, and 6 fans are opened simultaneously, impacts bigger because fan is opened the transient current of generation simultaneously, can cause relatively system power supply to seriously influence, and a plurality of fan is opened simultaneously also and can be produced bigger noise.Also there is the situation that adopts a plurality of PWM controllers to control a plurality of fans respectively in the prior art, but the coordination that can't operate between a plurality of fans of being controlled by separate a plurality of PWM controllers, therefore the transient current that exists fan to open generation simultaneously too impacts bigger, the problem that noise is serious.
Summary of the invention
The embodiment of the invention provides a kind of control method for fan and device, and to solve the simultaneously a plurality of fan runnings of PWM controller control in the prior art, the rush of current of generation is bigger, the problem that noise is serious.
For reaching above-mentioned purpose, the embodiment of the invention provides a kind of control method for fan, be used to comprise that the fan system of at least two fan groups is to carry out the adjustment of one or more speed class to this fan system, wherein said each fan group comprises a fan at least, may further comprise the steps: select fan group to be adjusted from described fan system; When needs carry out the adjustment of two or more speed class, described fan group is carried out the speed adjustment in progressive mode.
Describedly in progressive mode described fan group is carried out the speed adjustment and specifically comprise: by at least twice unlatching or close described fan group described fan group is carried out the speed adjustment of two-stage at least.
Described by at least twice unlatching or close described fan group carries out the speed adjustment of two-stage at least to described fan group after, also comprise: when fan system does not reach the maximum speed grade, close a fan group when opening a fan group to keep two or more fan group groups unlatching in turn in the described fan system.
When fan system does not reach the maximum speed grade, close a fan group when opening a fan group to keep two or more fan group groups unlatching in turn in the described fan system.
Before from described fan system, selecting fan group to be adjusted, also comprise: the fan in the described fan system is divided into a plurality of described fan groups.
After the fan in the described fan system is divided into a plurality of fan groups, also comprise: the speed class that described fan system is set according to the quantity of described fan group.
The embodiment of the invention also provides a kind of fan control device, be used to comprise the fan system of at least two fan groups, this fan system is carried out the adjustment of one or more speed class, wherein said each fan group comprises a fan at least, described fan control device is used for selecting fan group to be adjusted from described fan system, and when needs carry out the adjustment of two or more speed class, described fan group is carried out the speed adjustment in progressive mode, comprising:
Fan group selection unit is used for selecting fan group to be adjusted from described fan system;
Regulation unit is connected with described fan group selection subelement, is used for when needs carry out the adjustment of two or more speed class, in progressive mode described fan group is carried out the speed adjustment;
Described regulation unit comprises:
Subelement is adjusted in classification, is used for by at least twice unlatching or closes described fan group described fan group is carried out the speed adjustment of two-stage at least.
Open subelement in turn, be used for when fan system does not reach the maximum speed grade, close a fan group when opening a fan group to keep two or more fan groups unlatching in turn in the described fan system.
The described unlatching in turn specifically finished in a clock cycle.
Compared with prior art, a kind of control method for fan of the embodiment of the invention and system, only the fan group of minority is adjusted in each clock cycle by pwm signal control fan system, fan system is progressively adjusted to the predetermined work state, make fan system in running, can effectively reduce rush of current, avoid influence, reduce noise, energy efficient power supply system.
Description of drawings
Fig. 1 is the schematic representation of a kind of fan control in the prior art;
Fig. 2 is the flow chart of a kind of control method for fan of the embodiment of the invention;
Fig. 3 is that the system fan of the embodiment of the invention is heightened the deadbeat intention;
Fig. 4 is the system fan kick-down schematic representation of the embodiment of the invention;
Fig. 5 is the structural representation of a kind of fan control device of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present invention is described in further details:
As shown in Figure 2, be the flow chart of a kind of control method for fan of the embodiment of the invention.Mainly may further comprise the steps:
The division of fan group can be carried out according to actual needs in the embodiment of the invention, the fan number that is allocated to each fan group is few more, the quantity that division obtains the fan group is just many more, because the number of fans of opening in each clock cycle is few, the transient current that produces when therefore controlling fan system impacts also just less, and the noise during fan system work is also less relatively.
Be example with the fan system that comprises 6 fans below, the invention described above embodiment's fan control process is elaborated.The embodiment of the invention is divided into 6 fan groups with 6 fans in the fan system, and each fan belongs to a fan group respectively, and the embodiment of the invention not only is confined to this kind division to the division of fan group certainly.6 fans are used respectively: fan1, fan2, fan3, fan4, fan5, fan6 represent, division according to the fan group, speed governing grade to this fan system is provided with, and the speed governing grade that this fan system is set is 6, also can be set to greater than 6 or less than 6 certainly.Accordingly, the regulation fan speed-regulating cycle is the cycle of 6 input reference clocks (clk), also can be set to 6n input reference clock cycle, and n is the integer more than or equal to 1.
As shown in Figure 3, fan system is starting or is transferring to the process at a high speed from low speed, fan of only many unlatchings in each speed governing cycle.For example, among Fig. 3 with the wind speed of system fan when wind speed 1 is adjusted to wind speed 3, in clk is clock cycle of 1, triggers fan1 by pwm signal and open; In clk is speed governing cycle of 2, trigger fan2 by pwm signal and open, and in clk was clock cycle of 2, fan1 still was in opening state; In clk is clock cycle of 3, trigger fan3 by pwm signal and open, and in clk was clock cycle of 3, fan1, fan2 still was in opening state.So, when having arrived clk and be 3 clock cycle, because fan1, fan2, fan3 are in opening state, the wind speed of this fan system promptly has been adjusted to wind speed 3.In each clock cycle after fan system arrives wind speed 3, close at least one in running order fan, open the fan that at least one is in idle condition simultaneously, promptly when fan system does not reach the maximum speed grade, close a fan group when opening a fan group and open in turn, thereby make number of closing fan and the number of opening fan keep equating to keep in this fan system 3 fan groups.For example: in clk is clock cycle of 4, close fan1 among Fig. 3, open fan4, in running order fan is fan2, fan3, fan4; In clk is clock cycle of 5, close fan2, open fan5, in running order fan is fan3, fan4, fan5.So continue, guarantee all to have in each clock cycle 3 fans in running order, the stable working state that can guarantee fan system is at wind speed 3, and also make the work of this fan system reach balance, avoided local fan in running order for a long time, and the long-time idle problem of other fans.
Fan system by the process of transferring at a high speed low speed as shown in Figure 4, in clk was clock cycle of 2, fan2, fan3, fan4 were in running order, the wind speed of fan system is a wind speed 3.System's wind speed when wind speed 3 is adjusted to wind speed 1, in clk is clock cycle of 3, is closed fan2, fan3, open fan5, thus, clk is that in running order fan is fan4, fan5 in clock cycle of 3; In clk is clock cycle of 4, close fan4, fan5, open fan6, thus, clk is that in running order fan is fan6 in cycle of 4, the wind speed of system fan promptly is adjusted to wind speed 1.In each clock cycle after fan system arrives wind speed 1, close at least one in running order fan, open the fan that at least one is in idle condition simultaneously, make number of closing fan and the number of opening fan keep equating, specific operation process with embodiment illustrated in fig. 3 in identical, be not going to repeat.
From the embodiment of the invention described above as can be known, the open and close operation that each fan group is coordinated mutually in the fan system can arbitrarily be controlled by pwm signal, to satisfy the needs in the practical application.
The embodiment of the invention also provides a kind of fan control device, and the fan system that is used to comprise at least two fan groups is to carry out the adjustment of one or more speed class to this fan system, and wherein said each fan group comprises a fan at least.This fan control device is used for selecting fan group to be adjusted from fan system, and when needs carry out the adjustment of two or more speed class, in progressive mode this fan group is carried out the speed adjustment.This fan control device can be the CPU equal controller, and as shown in Figure 5, this fan control device comprises: fan group selection unit 1 and regulation unit 2.
Fan group selection unit 1 is used for selecting fan group to be adjusted from fan system.Selecteed fan group to be adjusted can be a fan group, also can be a plurality of fan groups.Regulation unit 2 connects fan group selection unit 1, is used in progressive mode described fan group being carried out the speed adjustment.Fan group to be adjusted has been selected in fan group selection unit 1 from this fan system after, regulation unit 2 triggers each fan group respectively by the pulse-width modulation PWM signal, by at least twice unlatching or close the fan group each fan group is carried out the speed adjustment of two-stage at least, this fan system is adjusted to the predetermined work state in progressive mode.In a clock cycle, trigger and open and/or close at least one fan group to be adjusted, through after at least one clock cycle, fan system is adjusted to the predetermined work state.In each clock cycle after fan system is adjusted to the predetermined work state, close the fan group of at least one working state, open the fan group of at least one idle condition, promptly when fan system does not reach the maximum speed grade, close a fan group when opening a fan group to keep two or more fan groups unlatching in turn in the described fan system, make number of closing fan and the number of opening fan keep equating, this stable working state that has just guaranteed fan system is in the working state scope of setting, and also make the work of this fan system reach balance, avoided local fan in running order for a long time, and the long-time idle problem of other fans.
Fan group selection subelement 1 was selected fan group to be adjusted from this fan system before, fan control device was divided into a plurality of fan groups with the fan in the fan system.Comprise at least one fan in each fan group, the fan number in each fan group can be identical, also can be different.Fan control device can carry out according to actual needs to the division of fan group, the fan number that is allocated to each fan group is few more, the quantity that division obtains the fan group is just many more, because the number of fans of opening in each clock cycle is few, the transient current that produces when therefore controlling fan system impacts also just less, and the noise during fan system work is also less relatively.
After the fan in the fan system was divided into a plurality of fan groups, fan control device also was provided with the speed class of fan system according to the quantity of fan group.The speed class of this fan system is traditionally arranged to be the fan group quantity that is greater than or equal to this fan system, also can be set to the quantity less than the fan group certainly.For preferred embodiment of the present invention, the speed governing grade that fan control device is provided with fan system is greater than or equal to the quantity of fan group, because the speed governing grade that is provided with is many more, the alternative of fan system rotating speed is also just many more, except better adaptability, also more energy-conservation.
Wherein, regulation unit 2 comprises classification adjustment subelement 21 and opens subelement 22 in turn.Classification is adjusted subelement 21 and is used for by at least twice unlatching or closes the fan group that fan control device divides this fan group is carried out the speed adjustment of two-stage at least, thereby makes regulation unit 2 realize in progressive mode the fan group being carried out the speed adjustment.Open subelement 22 in turn, be used for when fan system does not reach the maximum speed grade of fan control device setting, close a fan group when opening a fan group to keep two or more fan groups unlatching in turn in the described fan system, should open in turn and specifically in a clock cycle, finish, thereby make number of closing fan and the number of opening fan keep equating, this stable working state that has just guaranteed fan system and also makes the work of this fan system reach balance in the working state scope of setting.
In sum, the method and apparatus of a kind of fan control that the embodiment of the invention provides, only the fan group of minority is adjusted in each clock cycle by pwm signal control fan system, fan system is progressively adjusted to the predetermined work state, make fan system in running, can effectively reduce rush of current, avoid influence, reduce noise, energy efficient power supply system.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better mode of execution under a lot of situation.Based on such understanding, the part that technological scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. control method for fan is used to comprise the fan system of at least two fan groups, and so that this fan system is carried out the adjustment of one or more speed class, wherein said each fan group comprises a fan at least, it is characterized in that, may further comprise the steps:
From described fan system, select fan group to be adjusted;
When needs carry out the adjustment of two or more speed class, described fan group is carried out the speed adjustment in progressive mode;
Describedly in progressive mode described fan group is carried out the speed adjustment and specifically comprise: by at least twice unlatching or close described fan group described fan group is carried out the speed adjustment of two-stage at least.
When fan system does not reach the maximum speed grade, close a fan group when opening a fan group to keep two or more fan groups unlatching in turn in the described fan system.
2. control method for fan according to claim 1, it is characterized in that, closing a fan group in the time of fan group of described unlatching opens in turn and specifically comprises to keep in the described fan system two or more fan groups: in a clock cycle, trigger and open and/or close at least one described fan group.
3. control method for fan according to claim 1 is characterized in that, select fan group to be adjusted from described fan system before, also comprises: the fan in the described fan system is divided into a plurality of described fan groups.
4. as control method for fan as described in the claim 3, it is characterized in that, after the fan in the described fan system is divided into a plurality of fan groups, also comprise: the speed class that described fan system is set according to the quantity of described fan group.
5. fan control device, be used to comprise the fan system of at least two fan groups, this fan system is carried out the adjustment of one or more speed class, wherein said each fan group comprises a fan at least, it is characterized in that described fan control device is used for selecting fan group to be adjusted from described fan system, and when needs carry out the adjustment of two or more speed class, in progressive mode described fan group is carried out the speed adjustment, comprising:
Fan group selection unit is used for selecting fan group to be adjusted from described fan system;
Regulation unit is connected with described fan group selection subelement, is used for when needs carry out the adjustment of two or more speed class, in progressive mode described fan group is carried out the speed adjustment;
Described regulation unit comprises:
Subelement is adjusted in classification, is used for by at least twice unlatching or closes described fan group described fan group is carried out the speed adjustment of two-stage at least.
Open subelement in turn, be used for when fan system does not reach the maximum speed grade, close a fan group when opening a fan group to keep two or more fan groups unlatching in turn in the described fan system.
6. as fan control device as described in the claim 5, it is characterized in that described the unlatching in turn specifically finished in a clock cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101614212A CN101126392B (en) | 2007-09-21 | 2007-09-21 | Fan control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101614212A CN101126392B (en) | 2007-09-21 | 2007-09-21 | Fan control method and device |
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| CN101126392A CN101126392A (en) | 2008-02-20 |
| CN101126392B true CN101126392B (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101614212A Active CN101126392B (en) | 2007-09-21 | 2007-09-21 | Fan control method and device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975182B (en) * | 2010-10-25 | 2013-03-06 | 广东威创视讯科技股份有限公司 | Sequential start control method of fans of many kinds of heat generating equipment and application |
| CN103016381B (en) * | 2012-12-12 | 2016-02-10 | 曙光信息产业股份有限公司 | Server fan speed control system |
| CN103671199B (en) * | 2013-12-26 | 2016-04-20 | 中冶长天国际工程有限责任公司 | Fan frequency conversion speed regulating method and system |
| KR102514140B1 (en) * | 2015-08-12 | 2023-03-27 | 삼성전자주식회사 | Electronic device and method for controlling fan of the electronic device |
| CN105066379A (en) * | 2015-09-11 | 2015-11-18 | 珠海格力电器股份有限公司 | Control method and control device of fan system and household electrical appliance with same |
| CN115163540B (en) * | 2022-09-06 | 2022-12-23 | 新华三人工智能科技有限公司 | Fan rotating speed control method, device and equipment |
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- 2007-09-21 CN CN2007101614212A patent/CN101126392B/en active Active
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| CN101126392A (en) | 2008-02-20 |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: NEW H3C TECHNOLOGIES Co.,Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: HANGZHOU H3C TECHNOLOGIES Co.,Ltd. |
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Effective date of registration: 20230811 Address after: 24th Floor, Block B, Zhizhen Building, No. 7 Zhichun Road, Haidian District, Beijing, 100088 Patentee after: Beijing Ziguang Communication Technology Group Co.,Ltd. Address before: 310052 Changhe Road, Binjiang District, Hangzhou, Zhejiang Province, No. 466 Patentee before: NEW H3C TECHNOLOGIES Co.,Ltd. |
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