CN1661516A - Method and device for controlling fan - Google Patents
Method and device for controlling fan Download PDFInfo
- Publication number
- CN1661516A CN1661516A CN2005100565455A CN200510056545A CN1661516A CN 1661516 A CN1661516 A CN 1661516A CN 2005100565455 A CN2005100565455 A CN 2005100565455A CN 200510056545 A CN200510056545 A CN 200510056545A CN 1661516 A CN1661516 A CN 1661516A
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- China
- Prior art keywords
- fan
- control
- rotating speed
- supply voltage
- structure type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The method of controlling a fan involves connecting fans of a first type to the socket (1), whereby the first type receives a supply voltage which is independent of rotation rate and whose rotation rate is controlled by a rotation rate control signal (DS). Fans of a second type are also connected to the socket. The rotation rate of these is controlled by varying the supply voltage (V). The method according to the present invention is characterized in that the rotating speed of the fan is correctly controlled according to the structure style of the connected fan. Furthermore the invention also relates to a device for actualizing the method.
Description
Technical field
The present invention relates to a kind of method of the fan of control linkage on a socket, the fan that wherein on this socket, can connect one first structure type, this fan is imported a supply voltage that does not rely on rotating speed, and its rotating speed is controlled by a speed controling signal, and can connect the fan of one second structure type, its rotating speed is by the supply voltage Be Controlled.The invention still further relates to a kind of device that is used to control fan in addition.
Background technology
Integration density and more and more higher pulsed frequency along with increasing also raise to the demand of cooling off single parts in computing machine.For example to processor by be used to increase surface and passive convection current on to put the cooling of cooling body usually not enough.Be generally and support cooling to use independently fan, its air-flow is applied directly on the cooling body of temperature sensitive assembly.Usually do not need long-term the mistake at a high speed of fan to change.For processor, for example have only the very high application of calculating strength just to require the maximum (top) speed of fan.Because the high rotating speed of fan interrelates mostly with to the high noise load of user, therefore be worth making every effort to make the rotating speed of fan to meet the needs of and attenuating as far as possible.For this purpose, adopt the temperature that for example depends on processor to reduce the controller of rotation speed of the fan.Have a velocity gauge output, the actual speed that can determine, monitor and regulate fan by this output mostly at this situation fan.This controller is realized on mainboard usually in PC.So mounted fan is connected with this controller with cable by connector on processor.
In the first new structure type of fan, be used to change idle and signal for example pulse-length modulation of controller output of rotating speed.This fan is provided with a device and analyzes the signal of this pulse-length modulation and change rotating speed into.In this situation, fan has usually and is used for carrying out two inputs of electric current power supply, a velocity gauge output and a control that is used for rotating speed control with constant supply voltage and imports, and it is also referred to as 4 line fans below.The principle of this rotating speed control can certainly realize with the wiring of other number.
Change by the fan supply voltage in common second structure type in the market of fan realizes rotating speed control.Often have two input and velocity gauge outputs that are used for the electric current power supply at this known form of implementation apoplexy fan pass, it is also referred to as 3 line fans below.This principle is not imposed with accurate 3 wiring yet and is linked together in addition.Being controlled at of rotating speed can accomplished in various ways in this structure type.When rotating speed is controlled by the height of supply voltage, in the topworks on the computer motherboard a corresponding loss power can appear.Size must be selected like this by this topworks, makes also can not broken down by big electric current and the big power attenuation that occurs in this situation in the situation of blocked fan.Selectable in addition scheme is, a monitoring means is set, unusual big electric current when this unit is identified in blocked fan, and block this topworks so that protection is not subjected to the influence of lossy power.These two kinds of schemes are all with big expense with accordingly the area requirements of mainboard is interrelated.If the rotating speed of 3 line fans is controlled its supply voltage by pulse-length modulation in contrast, then by signal with more powerful pulse-length modulation attached on the line that is about 20cm between mainboard and the fan and the interference emission that produces plays negative interaction to the miscellaneous part of computing machine.
The known in addition fan that tacho signal is not provided.Can try to achieve rotating speed by the commutating pulse in the load current that is identified in fan so.
The current 3 line fans that in commercial PC, use with few exceptions.But can predict, in mainboard of future generation, can find growing 4 line fans application.So have a transit time, in this transit time both in mainboard also two kinds of forms of implementation of this in fan all on market, exist.
3 lines and 4 line fans use the plug of same series plug.Exist compatible completely in mechanical aspects: 3 lines and 4 line plugs match with 3 utmost points and 4 pole sockets mutually, and the reverse polarity protection wherein is provided in all cases.The electrical contact layout of plug and socket causes, and the 3 line fans that insert 4 pole sockets are with the highest rotating speed operation, and in contrast, the 4 line fans that insert 3 pole sockets are in a kind of nondeterministic statement.The two is not favourable.Under best situation, have only rotating speed not reduce, thus can not reducing noise, and the original purpose of fan control can not realize thus.In the worst case, can not provide processor enough coolings, this can cause system failure or close.
A conspicuous solution is, is provided for the socket of two kinds of fan type on mainboard, if this situation is arranged, has controller separately.But do not get rid of the danger of exchanging between two types thus.This in addition solution causes improving the manufacturing cost of mainboard, and has also occupied added space on circuit board.
Summary of the invention
Therefore task of the present invention is, a kind of method and apparatus of controlling fan is provided, making it possible to control the fan of access in the variable mode of rotating speed, is the fan (4 line fan) or the fan of second structure type (3 line fan) of first structure type and do not rely on related.
This task solves by a kind of method of controlling fan, and wherein, the fan that identification is connected on the socket is first structure type or second structure type, and controls fan according to the structure type of fan in the method.
In an advantageous embodiments of this method, the step of identification fan structure type and control fan is such,
-at first be made as one first method of operation of the fan that is used to control first structure type, constant maintenance supply voltage (V) in this method of operation, and by speed controling signal (DS) control rotating speed,
-obtain and analyze the actual speed of fan when changing speed controling signal (DS) then,
-if rotating speed changes when changing speed controling signal, then keeps first method of operation,
-if rotating speed does not change when changing speed controling signal, then is made as second method of operation by the control second structure type fan of supply voltage (V) control rotating speed.
Therefore discern according to the present invention a connection fan structure type and can be correctly and rotating speed drive fan controllably.And a unique plug is just enough on mainboard, gets rid of the type that is at every turn caused by the user thus and changes dangerous.The input that is used for rotating speed control by its function identification has and the irrelevant advantage of the detailed version of fan.This advantage does not provide in the embodiment that for example carries out fan type identification by the impedance of control input.And the stage of identification fan structure type is very short, and cognitive phase does not influence cooling thus.So at any time can both guarantee enough to derive heat, particularly when bringing into operation, need cooling hardly.
In another form of implementation of this method, the fan of second structure type is by the supply voltage control that is used for rotating speed control of a pulse width-modulated.Preferred in addition, can read in externally measured value and set-point, and regulate rotating speed according to these values.
As for described device, described task solves by the device that is used to control fan according to claim 7 according to the present invention.
The in addition preferred expansion of described method and apparatus provides in the dependent claims.
Description of drawings
Describe the present invention in detail with reference to an embodiment with reference to the accompanying drawings below.
Fig. 1 illustrates the frame circuit diagram of an embodiment of described device.
Fig. 2 illustrates a process flow diagram of described method.
Embodiment
Fig. 1 illustrates the device that the method according to this invention is used to control fan.Socket 1 is used to connect the fan as the different types of structure of mentioning when beginning.Socket 1 has ground terminal GND, is used to provide the terminal V of supply voltage, at the terminal DS of speed controling signal with at the terminal TS of tacho signal.Socket 1 is connected with the device 2 that is used to read in analyzing tacho signal TS, and the actual speed of fan is provided at its output terminal.The output terminal of device 2 is connected with control module 4 with storer 3.Connect comparer 5 on storer 3, the tachometer value of its check storage in storer 3 equates or does not wait.Relatively the time, also can get first value and directly get second value from storer from installing 2.The output of comparer 5 imports control module 4 equally.In addition, control module 4 has one or more input end, for example is used to read at the set-point SW of temperature or rotating speed and has one or more input end, for example is used to read in the measured value MW at the current processor temperature.As output, control module 4 provides speed controling signal DS and operating mode control signal BS.Speed controling signal DS is arranged in socket 1 on the one hand and is transformed to a variable supply voltage Vvar at driver 6 on the other hand.Depend on operating mode control signal BS, change-over switch 7 links to each other with the terminal of the supply voltage V on the socket 1 or with the output (V=Vvar) of driver 6, perhaps links to each other with a constant supply voltage source (V=Vcc).
Socket 1 mechanically designs with electric going up so, makes it possible to insert the commercial fan (3 lines or 4 line fans) of above-mentioned two kinds of structure types.At this 3 line fan contact ground terminal GND, supply voltage terminal V and tacho signal terminal TS.4 line fans also contact the terminal that is used for idle speed controling signal DS in addition except that described 3 terminals.3 line rotation speeds of the fan are changed can only be just possible by the change of supply voltage V, and this point both can also can realize by pulse-length modulation supply voltage V by the size that changes supply voltage.In contrast, 4 line fan supply voltage V are kept constant, rotating speed changes by one in fan device to be carried out, and it can analyze idle speed controling signal DS.Can realize like this in this change-over switch 7 and driver 6, promptly on-off element for example a final stage transistor take over this two kinds of functions.So for example having 100% corresponding to one, the output of a constant supply voltage connects the supply voltage of the pulse-length modulation of ratio.
Fig. 2 illustrates identification with process flow diagram and controls the method for fan, and this method is beginning after fan being inserted socket 1 or connecting described device.At first first method of operation is set, in this method of operation, exports a constant supply voltage V=Vcc to fan via operating mode control signal BS and change-over switch 7 by control module 4.Via one first rotating speed of speed controling signal DS regulation, it is for example corresponding to the maximum (top) speed of fan.Stand-by period through a measurement is determined the actual speed of fan by analyze tacho signal TS in unit 2, and stores in storer.Thereafter via one second rotating speed of DS regulation, it is fully different with first rotating speed, that is for example is 50% of maximum (top) speed.In fact the actual speed of She Zhiing storage in a similar manner once more.The value of being stored by comparer 5 relatively.When these two actual values not simultaneously, this means that this fan can analyze speed controling signal and will continue to be driven under this method of operation.When the actual speed of two storages not not simultaneously, fan does not have the device of analyzing speed controling signal DS.In this situation, switch to the method for operation that changes the supply voltage of fan for the control rotating speed.For this purpose, change-over switch 7 will link to each other with the output terminal of driver 6 at the terminal of the supply voltage V of fan, i.e. V=Vvar.
Said method can adapt to various demands very neatly.Be the control rotating speed, speed controling signal DS also can or change its size or this pulse-length modulation as variable supply voltage Vvar.Can so design control module 4 in addition, make it possible to read in set-point SW, for example rotating speed of a hope, an and measured value MW, the temperature of cooling package for example, and for control or regulate rotating speed and draw.Equally, can infer a kind of also can connect and correct driving not with the enforcement of the fan of tacho signal.In this situation, the commutating pulse of load current that can be by analyzing fan is determined actual speed.
Described setting is specially adapted to PC.In this situation, controller is arranged on the mainboard and fan is used to the cooling processing device.This setting can be used as a unique integrated circuit and realizes.Can give known assembly equally, for example be used to have only a kind of assembly of thermoregulator controller of fan of structure type, replenish other new assembly, so that realize described control.According to the present invention at socket of mainboard on needs.The solution of being introduced has been considered the requirement of manufacturer to compactedness thus.
List of numerals
1 socket
2 are used for analyzing the device of tacho signal TS
3 memories
4 control modules
5 comparers
6 drivers
7 change-over switches
The TS tacho signal
V fan supply voltage
The constant supply voltage of Vcc
The variable supply voltage of Vvar
GND ground
The DS speed controling signal
The BS operating mode control signal
The SW set-point
The MW measured value
Claims (16)
1. be used to be operatively connected to the method for the fan on the socket (1), wherein on this socket (1)
-can connect the fan of first structure type, its supply is not relied on the supply voltage (V) of rotating speed, and by a speed controling signal (DS) control its rotating speed and
-can connect the fan of second structure type, control its rotating speed by changing supply voltage (V),
It is characterized in that,
Being identified in the last fan that connects of socket (1) is first structure type or second structure type, and according to its structure type control fan.
According to the process of claim 1 wherein the structure type that is used to discern fan step and be used to control the following division of step of fan:
-at first be provided for controlling first method of operation of the fan of first structure type, constant maintenance supply voltage (V) in this method of operation, and by speed controling signal (DS) control rotating speed,
-obtain and analyze the actual speed of fan when changing speed controling signal (DS) then,
-if rotating speed changes when changing speed controling signal, then keeps first method of operation,
-if rotating speed does not change when changing speed controling signal, and second method of operation by the control second structure type fan of supply voltage (V) control rotating speed then is set.
3. according to the method for one of claim 1 or 2, it is characterized in that, by reading in and analyze the actual speed that tacho signal (TS) obtains fan.
4. according to the method for one of claim 1 to 3, it is characterized in that speed controling signal is pulse-length modulation.
5. according to the method for one of claim 1 to 4, it is characterized in that, with being control rotating speed and can change its big or small supply voltage (V) control second structure type fan.
6. according to the method for one of claim 1 to 4, it is characterized in that, with being control rotating speed and by the supply voltage of pulse-length modulation (V) the control second structure type fan.
7. according to the method for one of claim 1 to 6, it is characterized in that, read in externally measured value (MW) and set-point (SW), and depend on these values adjusting rotating speeds.
8. be used to control the device of fan, have:
-the first installs, and is used to control the fan of first structure type, and do not rely on the supply voltage (V) of rotating speed for this fan feed-in, and control its rotating speed by a speed controling signal (DS),
-the second installs, and is used to control the fan of second structure type, controls its rotating speed by changing supply voltage (V),
-be used for the device of structure type that identification is connected the fan on the socket (1),
Wherein, provide a control device (4), the structure type that is used to depend on the fan of being discerned activates described first or second device.
9. device according to Claim 8 is characterized in that, speed controling signal (DS) is pulse-length modulation.
10. according to Claim 8 or one of 9 device, it is characterized in that, be used to control rotating speed and its variable size of supply voltage (V) of changing.
11. according to Claim 8 or one of 9 device, it is characterized in that, be used to control rotating speed and the supply voltage (V) that changes is pulse-length modulation.
12. to one of 11 device, it is characterized in that according to Claim 8, have a device (2) that is used to read in and analyze tacho signal (TS) with the actual speed of determining fan.
13. to one of 12 device, it is characterized in that according to Claim 8, have a storer (3) and a comparer (5) at the actual speed value of fan.
14. to one of 13 device, it is characterized in that control device (4) has a device according to Claim 8,, and depend on this value of reading in adjusting rotating speed so that read in outside measured value (MW) and set-point (SW).
15. according to Claim 8 to one of 14 device, it is characterized in that, have a change-over switch (7), this change-over switch is controlled to described socket (1) by described control module provides a constant voltage (Vcc) or a variable supply voltage (Vvar) as supply voltage (V).
16. to one of 15 device, it is characterized in that it is used for the fan that control is used for cooling computer parts, especially processor according to Claim 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004009623.6 | 2004-02-27 | ||
| DE102004009623A DE102004009623B3 (en) | 2004-02-27 | 2004-02-27 | Method of controlling a fan connected to a socket such for use in a computer to cool heat generating components having two operating modes depending on the rotation rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1661516A true CN1661516A (en) | 2005-08-31 |
| CN100353284C CN100353284C (en) | 2007-12-05 |
Family
ID=35010863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100565455A Expired - Fee Related CN100353284C (en) | 2004-02-27 | 2005-02-28 | Method and device for controlling fan |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN100353284C (en) |
| DE (1) | DE102004009623B3 (en) |
| TW (1) | TWI277713B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7756402B2 (en) | 2007-06-29 | 2010-07-13 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Method and circuit for controlling rotation speed of computer fan |
| CN101476567B (en) * | 2008-01-02 | 2011-07-27 | 新唐科技股份有限公司 | Apparatus and method for fan auto-detection |
| CN102278321A (en) * | 2010-06-11 | 2011-12-14 | 英业达股份有限公司 | Fan rotating speed control method |
| CN101514708B (en) * | 2008-02-18 | 2012-12-19 | 鸿富锦精密工业（深圳）有限公司 | Computer fan control device |
| TWI383579B (en) * | 2007-07-06 | 2013-01-21 | Hon Hai Prec Ind Co Ltd | Control circuit and method for computer fan |
| CN103486067A (en) * | 2013-09-13 | 2014-01-01 | 华为技术有限公司 | Fan speed regulation processing method and device |
| CN103759397A (en) * | 2014-02-10 | 2014-04-30 | 广州松下空调器有限公司 | Method for controlling rotating speed of fan of indoor unit of air-conditioner |
| CN111102220A (en) * | 2019-12-18 | 2020-05-05 | 迈普通信技术股份有限公司 | Fan control device and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007040594A1 (en) * | 2007-01-24 | 2008-07-31 | Brahms, Martin, Dipl.-Ing. | Method for tempering multifunctional housing, involves arranging temperature sensor in multifunctional housing, and intelligent electronic switch is attached at blower |
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| EP0496570B1 (en) * | 1991-01-22 | 1998-06-03 | Honeywell Inc. | Two-level system identifier apparatus with optimization |
| US5436827A (en) * | 1994-06-30 | 1995-07-25 | Tandem Computers Incorporated | Control interface for customer replaceable fan unit |
| CN2443421Y (en) * | 2000-06-23 | 2001-08-15 | 保锐科技股份有限公司 | Computer power supply device with heat radiation and noise-proof control |
| US6792550B2 (en) * | 2001-01-31 | 2004-09-14 | Hewlett-Packard Development Company, L.P. | Method and apparatus for providing continued operation of a multiprocessor computer system after detecting impairment of a processor cooling device |
| US20030074591A1 (en) * | 2001-10-17 | 2003-04-17 | Mcclendon Thomas W. | Self adjusting clocks in computer systems that adjust in response to changes in their environment |
| CN1212554C (en) * | 2001-10-19 | 2005-07-27 | 联想(北京)有限公司 | Computer temperature control device and method |
| CN2539219Y (en) * | 2001-12-28 | 2003-03-05 | 大安电子（东莞）有限公司 | Radiating fan for computer casing |
| CN2554706Y (en) * | 2002-05-10 | 2003-06-04 | 神基科技股份有限公司 | Intelligence fan cooling device |
| US6813150B2 (en) * | 2002-08-09 | 2004-11-02 | Sun Microsystems, Inc. | Computer system |
-
2004
- 2004-02-27 DE DE102004009623A patent/DE102004009623B3/en not_active Expired - Fee Related
-
2005
- 2005-02-23 TW TW094105342A patent/TWI277713B/en not_active IP Right Cessation
- 2005-02-28 CN CNB2005100565455A patent/CN100353284C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7756402B2 (en) | 2007-06-29 | 2010-07-13 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Method and circuit for controlling rotation speed of computer fan |
| TWI383579B (en) * | 2007-07-06 | 2013-01-21 | Hon Hai Prec Ind Co Ltd | Control circuit and method for computer fan |
| CN101476567B (en) * | 2008-01-02 | 2011-07-27 | 新唐科技股份有限公司 | Apparatus and method for fan auto-detection |
| CN101514708B (en) * | 2008-02-18 | 2012-12-19 | 鸿富锦精密工业（深圳）有限公司 | Computer fan control device |
| CN102278321A (en) * | 2010-06-11 | 2011-12-14 | 英业达股份有限公司 | Fan rotating speed control method |
| CN102278321B (en) * | 2010-06-11 | 2015-03-25 | 英业达股份有限公司 | Fan rotating speed control method |
| CN103486067A (en) * | 2013-09-13 | 2014-01-01 | 华为技术有限公司 | Fan speed regulation processing method and device |
| CN103486067B (en) * | 2013-09-13 | 2016-01-27 | 华为技术有限公司 | Fan speed-regulating processing method and device |
| CN103759397A (en) * | 2014-02-10 | 2014-04-30 | 广州松下空调器有限公司 | Method for controlling rotating speed of fan of indoor unit of air-conditioner |
| CN103759397B (en) * | 2014-02-10 | 2019-05-07 | 广州松下空调器有限公司 | A kind of control method of air conditioner room unit rotation speed of the fan |
| CN111102220A (en) * | 2019-12-18 | 2020-05-05 | 迈普通信技术股份有限公司 | Fan control device and system |
| CN111102220B (en) * | 2019-12-18 | 2020-12-25 | 迈普通信技术股份有限公司 | Fan control device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100353284C (en) | 2007-12-05 |
| TW200532146A (en) | 2005-10-01 |
| TWI277713B (en) | 2007-04-01 |
| DE102004009623B3 (en) | 2005-10-27 |
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