CN106445028B - Fan rotational frequency control method, device and system - Google Patents
Fan rotational frequency control method, device and system Download PDFInfo
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- CN106445028B CN106445028B CN201610853266.XA CN201610853266A CN106445028B CN 106445028 B CN106445028 B CN 106445028B CN 201610853266 A CN201610853266 A CN 201610853266A CN 106445028 B CN106445028 B CN 106445028B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/206—Cooling means comprising thermal management
Abstract
The invention discloses a kind of fan rotational frequency control methods, device and system, are related to electronic technology field, for solving the problem of that business board that can not be different to calorific value by the way of being uniformly controlled rotation speed of the fan cools down respectively.Fan rotational frequency control method includes the highest measurement temperature of the heat generating spot of acquisition business board；Determine that the heat generating spot of the business board corresponds to the maximum speed of sub- fan according to the highest measurement temperature and environment temperature；If the maximum speed of the sub- fan of correspondence is higher than the current rotating speed of the sub- fan of the correspondence, then increase the revolving speed of the sub- fan of the correspondence, if the maximum speed of the sub- fan of correspondence is lower than the current rotating speed of the sub- fan of the correspondence, the revolving speed of the sub- fan of the correspondence is reduced.The embodiment of the present invention is applied to fan and individually controls.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of fan rotational frequency control methods, device and system.
Background technique
In large-scale case type communication equipment, the board for supporting a variety of different business, the core of every kind of board generally may require that
Sheet type and layout may be all different, therefore different business boards has different radiating requirements.At present mainly by air-cooled
Or water-cooling pattern cools down to business board card.
When carrying out wind cooling temperature lowering, cooling degree is mainly controlled by control rotation speed of the fan.And general large-scale case type
Communication equipment usually requires that the board for supporting a variety of different business, and the chip type and layout of every kind of business board may be all different
Sample, so not only sites of heat generation is not fixed but also calorific value is also different.Different business boards has different radiating requirements, but
It is in the prior art by the way of being uniformly controlled rotation speed of the fan, business board that can not be different to calorific value drops respectively
Temperature.
Summary of the invention
The embodiment of the present invention provides a kind of fan rotational frequency control method, device and system, for solving using unified control
The problem of mode of rotation speed of the fan processed, business board that can not be different to calorific value cools down respectively.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, a kind of fan rotational frequency control method is provided, applied to each of on one or more groups of fan disks
The revolving speed of sub- fan is controlled, and every group of fan disk includes one or more sub- fans, this method comprises:
The highest measurement temperature of the heat generating spot of acquisition business board；
Determine that the heat generating spot of the business board corresponds to sub- fan most according to the highest measurement temperature and environment temperature
High revolving speed；
If the maximum speed of the sub- fan of correspondence is higher than the current rotating speed of the sub- fan of the correspondence, it is described right to increase
The revolving speed of sub- fan is answered, if the maximum speed of the sub- fan of the correspondence is lower than the current rotating speed of the sub- fan of the correspondence, is dropped
The revolving speed of the low sub- fan of the correspondence.
Second aspect provides a kind of fan rotation speed control apparatus, applied to each of on one or more groups of fan disks
The revolving speed of sub- fan is controlled, and every group of fan disk includes one or more sub- fans, which includes:
Acquiring unit, the highest measurement temperature of the heat generating spot for obtaining business board；
Determination unit, for determining the heat generating spot pair of the business board according to the highest measurement temperature and environment temperature
Answer the maximum speed of sub- fan；
Adjustment unit, if the maximum speed for the sub- fan of the correspondence works as forward higher than the sub- fan of the correspondence
Speed then increases the revolving speed of the sub- fan of the correspondence, if the maximum speed of the sub- fan of the correspondence is lower than the sub- fan of the correspondence
Current rotating speed, then reduce the revolving speed of the sub- fan of the correspondence.
The third aspect provides a kind of fan rotary speed control system, including the rotation speed of the fan control as described in second aspect
Device.
The fan rotational frequency control method of the embodiment of the present invention offer, device and system, it is corresponding by obtaining sub- fan
The highest measurement temperature of business board heat generating spot, then according to the corresponding heat generating spot highest measurement temperature of the sub- fan and environment temperature
The maximum speed for determining the sub- fan is spent, if the maximum speed of the sub- fan is higher than the current rotating speed of the sub- fan, is increased
The revolving speed of the sub- fan reduces the sub- fan if the maximum speed of the sub- fan is lower than the current rotating speed of the sub- fan
Revolving speed allows to the demand that cools down according to heat generating spot, to adjust the revolving speed of corresponding sub- fan, to solve using unified control
The problem of mode of rotation speed of the fan processed, business board that can not be different to calorific value cools down respectively.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the fan rotary speed control system that the embodiment of the present invention provides；
Fig. 2 is the flow diagram for the fan rotational frequency control method that the embodiment of the present invention provides；
Fig. 3 is the highest measurement temperature for the corresponding business board heat generating spot of the sub- fan of acquisition that the embodiment of the present invention provides
Flow diagram；
Fig. 4 is the structural schematic diagram for the fan rotation speed control apparatus that the embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to fig. 1, the embodiment provides a kind of fan rotary speed control systems, comprising: rotation speed of the fan
Control device 11, fan disk 12 and business board 13.Wherein, fan disk 12 may include one or more groups of fan disks, every group of wind
Fanning tray includes one or more sub- fans 121.Each business board has more than one heat generating spot (i.e. heating device), Mei Gefa
Hot spot has the temperature of each heat generating spot of temperature sensor real-time monitoring.Fan rotation speed control apparatus 11 is used for one or more groups of
The revolving speed of every sub- fan on fan disk 12 is controlled, to cool down to business board 13.
Fan rotational frequency control method described in the embodiment of the present invention, device and system, by dynamically establishing heat generating spot and son
Fan relation mapping table finds out the hottest spot temperature of each sub- fan, and then the revolving speed of every sub- fan of independent control, with complete machine
The scheme of all only one revolving speeds of fan is compared, more energy saving and noise reduction.Using speed regulation side step by step when being adjusted the speed to fan
Case, more safe and reliable compared with direct transition scheme, because transition process may cause complete machine, electric current moment becomes larger, to complete machine
There are certain risks for system.Heat radiation point used in the embodiment of the present invention and sub- fan relation mapping table are that dynamic is established,
All slot positions, which are not distinguished, to be treated, so the slot position of the business board of different radiating requirements can be not fixed, increases system spirit
Activity, the user experience is improved.
Embodiment 1,
The embodiment provides a kind of fan rotational frequency control methods, are applied to said fans revolution speed control system,
Referring to fig. 2, this method comprises:
S101, the highest measurement temperature for obtaining business board heat generating spot.
Can periodic polling read each heat generating spot temperature value on each business board.Polling cycle can be 1s, 2s etc.,
Herein without limitation.Polling sequence can be carried out according to slot number where business board, be polled to last from first slot position
A slot position.Heat generating spot in each slot position can be then polled according to heat generating spot serial number.
Specifically, referring to fig. 3, step S101 includes step S1011-S1012:
S1011, the slot number heat generating spot serial number corresponding with the slot position for periodically traversing each business board place slot position.
S1012, the current measurement temperature that corresponding heat generating spot is measured according to slot number heat generating spot serial number corresponding with the slot position.
Specifically, obtaining the temperature sensor of the heat generating spot by slot number heat generating spot serial number corresponding with the slot position, read
The temperature value for taking the temperature sensor to obtain currently measures temperature as the heat generating spot.
S1013, obtain corresponding to fan reel number where sub- fan according to slot number, heat generating spot serial number inquiry fan mapping table
With sub- fan number.
Fan mapping table structure is as shown in table 1.The table is using slot number and heat generating spot serial number as index (ranks
Location).Table content is then fan reel number and sub- fan number.Each heat generating spot can correspond to multiple sub- fans, so the fan reflects
Each list item of firing table may include one or more groups of fan reel numbers and sub- fan number, every group of fan reel number and sub- fan correspondence
One sub- fan.
Table 1
The foundation of fan mapping table is there are two types of mode, another one is issuing configuration by master controller CPU to realize
It is directly to be read from the storage chip (RAM) in each business board by FPGA or CPLD etc. to build after operational plate is inserted into
It is vertical.
S1014, it obtains corresponding to the corresponding hair of sub- fan according to every group of fan reel number and sub- fan number inquiry temperature map table
The historical high of hot spot measures temperature.
Specifically, temperature map table structure is as shown in table 2.The table is using fan reel number and sub- fan number as index
(rank addresses).Table content is then the historical high measurement temperature of the corresponding heat generating spot of the sub- fan of storage.Above table
Content can be stored with register or be stored using data structure, and the present invention is not limited thereto.
Table 2
S1015, highest measurement temperature is obtained according to current measurement temperature and historical high measurement temperature, and refreshes temperature and reflects
Firing table.
Specifically, if the historical high measurement temperature for corresponding to sub- fan in table 2 is lower than the current measurement of corresponding heat generating spot
Temperature, then using the current measurement temperature of corresponding heat generating spot as highest measurement temperature, otherwise, still to correspond to sub- fan in table 2
Historical high measures temperature as highest measurement temperature.
For table 2 refresh can according to the temperature sensor interface agreement of heat generating spot come control bus timing, according to
Slot number and heat generating spot sequence number (i.e. the address of devices of temperature sensor) are completed to read temperature operation.The interface of temperature sensor is assisted
View can be I2C, Local bus, SPI etc., specifically be determined by selected temperature sensor chip.
When being refreshed, the historical high that corresponding sub- fan is read from table 2 measures temperature value, and the historical high is surveyed
Amount temperature value is compared with the current measurement temperature that the temperature sensor at corresponding heat generating spot is read, if temperature sensor is read
Current measurement temperature be greater than table 2 in the sub- fan historical high measure temperature value, then by temperature sensor read it is current
Measurement temperature refreshes the historical high measurement temperature value of the sub- fan into table 2, if it is less than not refreshing then.
S102, the heat generating spot highest measurement temperature according to corresponding to correspondence sub- fan and environment temperature determine business board
Heat generating spot corresponds to the maximum speed of sub- fan.
Specifically, can be according to the corresponding heat generating spot highest measurement temperature of the sub- fan, combining environmental temperature, user configuration
Etc. conditions completed according to certain algorithm the fan maximum speed value calculating.It can be sensed by special environment temperature
The environment temperature that device is got.User configuration, such as silent mode can be issued by CPU, then base rpm can be relatively low.Normally
Then base rpm is moderate for mode.Radiating, then base rpm can be relatively high for mode of priority.Environment temperature sensor can in master control borad,
It can also be on each business board.
The maximum speed that one sub- fan completes to continue after calculating next sub- fan calculates, until the institute in the fan disk
There is sub- fan all to complete to calculate the operation for then starting next fan disk, until all fan disks are all completed to calculate then to terminate this week
The calculating operation of phase.Specific Principles are that the corresponding heat generating spot highest measurement temperature of sub- fan is higher or environment temperature is higher, then
The maximum speed of the sub- fan is higher；The corresponding heat generating spot highest measurement temperature of sub- fan is lower or environment temperature is lower, then
The maximum speed of the sub- fan is lower.
This programme neutron fan maximum (top) speed can be by being determined with minor function: S=fa(x)+fb(y)+fc(z)。
Wherein, S indicates the maximum speed of the sub- fan；fa(x) it is the base rpm function of user setting, is matched by user
A base rpm value for setting decision, is equivalent to a piecewise function for tachometer value S, and different user configurations is corresponding not
Same base rpm value can be presented as the minimum speed value or default tachometer value of all sub- fans；fb(y) it determines for environment temperature
Fixed revolving speed, environment temperature more high request revolving speed is also bigger, is linear relationship therebetween, and specific coefficient is determined by actual test
It is fixed；fc(z) revolving speed that the highest measurement temperature for corresponding to heat generating spot for sub- fan determines, temperature more high request revolving speed is also bigger, and two
The physical relationship of person is determined by the actual test of specific cabinet.
It further can be by fb(y)+fc(z) it indicates are as follows: a+b* environment temperature+delta.Wherein a, b are constant, delta
For the speed regulation incremental value that heat generating spot highest measurement temperature determines, be equivalent to a piecewise function for revolving speed S, it is different most
High measurement temperature range, corresponding different speed regulation incremental value, which can be that positive number is also negative.
If the maximum speed of S103, corresponding sub- fan are higher than the current rotating speed of the sub- fan of the correspondence, the correspondence is increased
The revolving speed of sub- fan reduces the sub- wind of the correspondence if the maximum speed of corresponding sub- fan is lower than the current rotating speed of the sub- fan
The revolving speed of fan.
It is adjusted the speed step by step specifically, can use, and the maximum speed of sub- fan is compared with current rotating speed, if sub- wind
The maximum speed of fan is higher than the current rotating speed of sub- fan, then current rotating speed is increased level-one；If the maximum speed of sub- fan is lower than
Current rotating speed, then is adjusted to the maximum speed of sub- fan by the current rotating speed of sub- fan, keeps current rotating speed constant if equal.
Speed-regulating scheme is more safe and reliable compared with direct transition scheme step by step used in the embodiment of the present invention, because transition process can
Complete machine electric current moment can be caused to become larger, there are certain risks for machine system.
Newly-installed rotation speed of the fan value can be converted into PWM (full name in English: pulse width modulation, in
Literary full name: pulse width modulation) pulse signal, and control the operating of each sub- fan.The tachometer value of each sub- fan is periodically brushed
Newly.Illustratively, newly-installed rotation speed of the fan value can be saved into register group according to fan reel number and fan sequence number, then
The tachometer value of all sub- fans of all fan disks is periodically read out of register, and the tachometer value is converted into pwm signal,
It is exported by corresponding rotation speed of the fan control line, controls the operating of each fan.
Since fan part needs operating throughout the year, the abrasion of bearing inevitably results in the failure of fan, in addition, fan is big
Main noise source and source of energy consumption in type case type communication equipment, the revolving speed of fan is bigger, and energy consumption is higher, and noise is also got over
Greatly.Fan rotational frequency control method provided in an embodiment of the present invention, can cool down demand according to heat generating spot, to adjust corresponding sub- wind
The revolving speed of fan, so that guaranteeing that cooling effect reduces rotation speed of the fan as far as possible simultaneously, to reduce fan loss, reduce energy consumption and drop
Low noise.
Fan rotational frequency control method provided in an embodiment of the present invention, by obtaining the corresponding business board heat generating spot of sub- fan
Highest measurement temperature, the sub- fan is then determined according to the corresponding heat generating spot highest measurement temperature of the sub- fan and environment temperature
Maximum speed, if the maximum speed of the sub- fan be higher than the sub- fan current rotating speed, increase the revolving speed of the sub- fan,
If the maximum speed of the sub- fan is lower than the current rotating speed of the sub- fan, the revolving speed of the sub- fan is reduced, root is allowed to
According to heat generating spot cooling demand, to adjust the revolving speed of corresponding sub- fan, to solve using the side for being uniformly controlled rotation speed of the fan
The problem of formula, business board that can not be different to calorific value cools down respectively.
Embodiment 2,
The embodiment provides a kind of fan rotation speed control apparatus, are applied to said fans method for controlling number of revolution,
As fan rotation speed control apparatus 11 shown in Fig. 1, referring to fig. 4, which includes:
Acquiring unit 1101, the highest measurement temperature of the heat generating spot for obtaining business board；
Determination unit 1102, highest measurement temperature and environment temperature for being obtained according to acquiring unit 1101 determine business
The heat generating spot of board corresponds to the maximum speed of sub- fan；
Adjustment unit 1103, for if it is determined that the maximum speed for the sub- fan of correspondence that unit 1102 determines is higher than corresponding son
The current rotating speed of fan then increases the revolving speed of corresponding sub- fan, if the maximum speed of corresponding sub- fan is lower than corresponding sub- fan
Current rotating speed, then reduce the revolving speed of corresponding sub- fan.
Optionally, in a kind of possible design, acquiring unit 1101 is specifically used for:
The slot number and the corresponding heat generating spot serial number of the slot position of slot position where periodically traversing each business board；
The current measurement temperature of corresponding heat generating spot is measured according to slot number and heat generating spot serial number；
Where obtaining the sub- fan of the correspondence according to the slot number and heat generating spot serial number inquiry fan mapping table
Fan reel number and sub- fan number, wherein each list item of the fan mapping table includes one or more groups of fan reel numbers and sub- wind
The corresponding sub- fan of fan number, every group of fan reel number and sub- fan number；
It obtains corresponding to hair corresponding to sub- fan according to every group of fan reel number and sub- fan number inquiry temperature map table
The historical high of hot spot measures temperature；
Highest measurement temperature is obtained according to current measurement temperature and historical high measurement temperature.
Optionally, in a kind of possible design, determination unit 1102 is specifically used for:
According to S=fa(x)+fb(y)+fc(z) maximum speed of corresponding sub- fan is determined, wherein S indicates corresponding sub- wind
The maximum speed of fan, fb(y) revolving speed determined for environment temperature, fc(z) the highest measurement temperature of heat generating spot is corresponded to for corresponding sub- fan
Spend the revolving speed determined.
Optionally, in a kind of possible design, adjustment unit 1103 is specifically used for:
If the maximum speed of corresponding sub- fan is higher than the current rotating speed of corresponding sub- fan, current rotating speed is increased by one
Grade；If the maximum speed of corresponding sub- fan is adjusted to corresponding son lower than the current rotating speed of corresponding sub- fan, by current rotating speed
The maximum speed of fan.
Since the fan rotation speed control apparatus in the embodiment of the present invention can be applied to said fans method for controlling number of revolution, because
This can be obtained technical effect see also above method embodiment, and details are not described herein for the embodiment of the present invention.
It, can also be with it should be noted that acquiring unit, determination unit and adjustment unit can be the processor individually set up
It is integrated in some processor of controller and realizes, in addition it is also possible to be stored in depositing for controller in the form of program code
In reservoir, is called by some processor of controller and execute the function of the above acquiring unit, determination unit and adjustment unit.
Processor described here can be a central processing unit (full name in English: central processing unit, English letter
Claim: CPU) or specific integrated circuit (full name in English: application specific integrated circuit,
English abbreviation: ASIC), or be arranged to implement one or more integrated circuits of the embodiment of the present invention.
It should be understood that in various embodiments of the present invention, magnitude of the sequence numbers of the above procedures are not meant to execute suitable
Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention
Process constitutes any restriction.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, it can be with
It realizes by another way.For example, apparatus embodiments described above are merely indicative, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of equipment or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (full name in English: read-only memory, English letter
Claim: ROM), random access memory (full name in English: random access memory, English abbreviation: RAM), magnetic disk or light
The various media that can store program code such as disk.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of fan rotational frequency control method, which is characterized in that applied to every sub- fan on one or more groups of fan disks
Revolving speed controlled, every group of fan disk includes one or more sub- fans, which comprises
The highest measurement temperature of the heat generating spot of acquisition business board, wherein temperature is currently measured according to heat generating spot and heat generating spot is gone through
History highest measurement temperature obtains the highest measurement temperature；
Determine that the heat generating spot of the business board corresponds to the highest turn of sub- fan according to the highest measurement temperature and environment temperature
Speed；
If the maximum speed of the sub- fan of correspondence is higher than the current rotating speed of the sub- fan of the correspondence, the corresponding son is increased
The revolving speed of fan reduces institute if the maximum speed of the sub- fan of the correspondence is lower than the current rotating speed of the sub- fan of the correspondence
State the revolving speed of corresponding sub- fan.
2. the method according to claim 1, wherein the highest measurement temperature of the acquisition business board heat generating spot
Degree, comprising:
The slot number and the corresponding heat generating spot serial number of the slot position of slot position where periodically traversing each business board；
The current measurement temperature of corresponding heat generating spot is measured according to the slot number and the heat generating spot serial number；
The fan where the sub- fan of the correspondence is obtained according to the slot number and heat generating spot serial number inquiry fan mapping table
Reel number and sub- fan number, wherein each list item of the fan mapping table includes one or more groups of fan reel numbers and sub- fan number,
Every group of fan reel number and the corresponding sub- fan of sub- fan number；
Hair corresponding to the sub- fan of the correspondence is obtained according to every group of fan reel number and sub- fan number inquiry temperature map table
The historical high of hot spot measures temperature.
3. the method according to claim 1, wherein described true according to the highest measurement temperature and environment temperature
The heat generating spot of the fixed business board corresponds to the maximum speed of sub- fan, comprising:
According to S=fa(x)+fb(y)+fc(z) maximum speed of the sub- fan of the correspondence is determined, wherein S indicates the correspondence
The maximum speed of sub- fan, faIt (x) is the base rpm of user setting, fb(y) revolving speed determined for the environment temperature, fc(z)
The revolving speed determined for the highest measurement temperature that the sub- fan of the correspondence corresponds to heat generating spot.
4. if the method according to claim 1, wherein the maximum speed of the sub- fan of correspondence is higher than
The current rotating speed of the sub- fan of correspondence, then increase the revolving speed of the sub- fan of the correspondence, if the highest of the sub- fan of the correspondence
Revolving speed is lower than the current rotating speed of the sub- fan of the correspondence, then reduces the revolving speed of the sub- fan of the correspondence, comprising:
If the maximum speed of the sub- fan of correspondence is higher than the current rotating speed of the sub- fan of the correspondence, by the current rotating speed
Increase level-one；If the maximum speed of the sub- fan of correspondence is lower than the current rotating speed of the sub- fan of the correspondence, work as by described in
Forward speed is adjusted to the maximum speed of the sub- fan of the correspondence.
5. a kind of fan rotation speed control apparatus, which is characterized in that applied to every sub- fan on one or more groups of fan disks
Revolving speed controlled, every group of fan disk includes one or more sub- fans, and described device includes:
Acquiring unit, the highest measurement temperature of the heat generating spot for obtaining business board, wherein temperature is currently measured according to heat generating spot
Degree and heat generating spot historical high measurement temperature obtain the highest measurement temperature；
Determination unit, the corresponding son of heat generating spot for determining the business board according to the highest measurement temperature and environment temperature
The maximum speed of fan；
Adjustment unit, if being higher than the current rotating speed of the sub- fan of the correspondence for the maximum speed of the sub- fan of the correspondence,
The revolving speed of the sub- fan of the correspondence is increased, if the maximum speed of the sub- fan of the correspondence is current lower than the sub- fan of the correspondence
Revolving speed then reduces the revolving speed of the sub- fan of the correspondence.
6. device according to claim 5, which is characterized in that the acquiring unit is specifically used for:
The slot number and the corresponding heat generating spot serial number of the slot position of slot position where periodically traversing each business board；
The current measurement temperature of corresponding heat generating spot is measured according to the slot number and the heat generating spot serial number；
The fan where the sub- fan of the correspondence is obtained according to the slot number and heat generating spot serial number inquiry fan mapping table
Reel number and sub- fan number, wherein each list item of the fan mapping table includes one or more groups of fan reel numbers and sub- fan number,
Every group of fan reel number and the corresponding sub- fan of sub- fan number；
Hair corresponding to the sub- fan of the correspondence is obtained according to every group of fan reel number and sub- fan number inquiry temperature map table
The historical high of hot spot measures temperature.
7. device according to claim 5, which is characterized in that the determination unit is specifically used for:
According to S=fa(x)+fb(y)+fc(z) maximum speed of the sub- fan of the correspondence is determined, wherein S indicates the correspondence
The maximum speed of sub- fan, faIt (x) is the base rpm of user setting, fb(y) revolving speed determined for the environment temperature, fc(z)
The revolving speed determined for the highest measurement temperature that the sub- fan of the correspondence corresponds to heat generating spot.
8. device according to claim 5, which is characterized in that the adjustment unit is specifically used for:
If the maximum speed of the sub- fan of correspondence is higher than the current rotating speed of the sub- fan of the correspondence, by the current rotating speed
Increase level-one；If the maximum speed of the sub- fan of correspondence is lower than the current rotating speed of the sub- fan of the correspondence, work as by described in
Forward speed is adjusted to the maximum speed of the sub- fan of the correspondence.
9. a kind of fan rotary speed control system, including the fan rotation speed control apparatus as described in any one of claim 5-8.
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