JP2008171219A - Control method for cooling fan in computer device - Google Patents

Control method for cooling fan in computer device Download PDF

Info

Publication number
JP2008171219A
JP2008171219A JP2007003988A JP2007003988A JP2008171219A JP 2008171219 A JP2008171219 A JP 2008171219A JP 2007003988 A JP2007003988 A JP 2007003988A JP 2007003988 A JP2007003988 A JP 2007003988A JP 2008171219 A JP2008171219 A JP 2008171219A
Authority
JP
Japan
Prior art keywords
cooling fan
temperature
noise
rotational speed
rotations
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.)
Pending
Application number
JP2007003988A
Other languages
Japanese (ja)
Inventor
Takeyasu Yoshimoto
健康 吉本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2007003988A priority Critical patent/JP2008171219A/en
Publication of JP2008171219A publication Critical patent/JP2008171219A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method for cooling fan for minimizing discomfort due to noise generated from a cooling fan in a computer device. <P>SOLUTION: The rate of increase in rotating speed of the cooling fan is minimized when a system is started and has a large noise due to a high rotating speed of the cooling fan, to reduce the discomfort. When the temperature is low, the cooling capability is enhanced by increasing the rotating speed of the cooling fan within an allowable range of noise to minimize the change in rotating speed of the cooling fan or change in noise, whereby the discomfort is reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、冷却用ファンと温度センサと温度センサで測定した温度を記録するメモリと
温度センサとメモリに記録した温度を用いて冷却用ファンの回転数を制御するコントロー
ラを持つコンピュータ装置の冷却用ファンの回転数の制御に関する。
The present invention relates to a cooling fan, a temperature sensor, a memory for recording the temperature measured by the temperature sensor, a temperature sensor, and a controller for controlling the number of rotations of the cooling fan using the temperature recorded in the memory. The present invention relates to fan speed control.

コンピュータ装置はCPUやGPU、メモリなどのLSI、ハードディスクやCD−R
OMなどの駆動装置、入出力装置、電源などの部品を搭載しており、それらが動作するこ
とにより発熱する。各部品には動作許容温度が定められており発熱による温度上昇が動作
許容内に収まるように冷却をする必要がある。
Computer devices include CPUs, GPUs, LSIs such as memory, hard disks, and CD-Rs.
Components such as a driving device such as an OM, an input / output device, and a power source are mounted, and generate heat when they operate. Each component has a permissible operating temperature and must be cooled so that the temperature rise due to heat generation falls within the permissible operating range.

一般にコンピュータ装置の冷却は冷却用ファンを用いて熱を筐体の外に排熱することで
行う。
In general, the computer apparatus is cooled by exhausting heat out of the housing using a cooling fan.

一般には冷却用ファンの回転数の制御は常に一定の回転数を保つ。温度センサを用い、
温度が低い時は低速で、温度が高い時は高速で回転させる様に回転数を温度によって数段
階に変化させる方式を取っている。
In general, the control of the number of rotations of the cooling fan always maintains a constant number of rotations. Using a temperature sensor
When the temperature is low, the rotation speed is changed at a low speed, and when the temperature is high, the rotation speed is changed in several steps depending on the temperature.

コンピュータ装置の高性能化、高集積化により装置内の排熱が重要になっている。排熱
のためには冷却用ファンの回転数を上げれば良いが、冷却用ファンの回転により発生する
騒音が問題になる。
Due to high performance and high integration of computer devices, exhaust heat in the devices has become important. For exhaust heat, the number of rotations of the cooling fan may be increased, but noise generated by the rotation of the cooling fan becomes a problem.

騒音を考慮した冷却用ファンの回転数制御の方法として特許文献1がある。   Patent Document 1 discloses a method for controlling the rotational speed of a cooling fan in consideration of noise.

特開2002−268775号公報JP 2002-268775 A

文献1は温度領域を幾つかに分け領域毎に冷却用ファンの回転数を制御し人に不快感を
与えないようにしている。しかし、システムの起動時は冷却用ファンの回転数の増加が急
峻であり、例え音量が小さくても無音から立ち上がるので人には不快に感じる。また、温
度がもっとも高い領域ではは回転数の増加を大きくしている。つまり、回転数が高く騒音
が大きくて不快に感じている時程騒音の増分の変化が大きくより不快に感じる。
Document 1 divides the temperature region into several regions and controls the rotation speed of the cooling fan for each region so as not to cause discomfort to humans. However, when the system is started up, the number of rotations of the cooling fan increases steeply, and even if the sound volume is low, it rises from silence, which makes it uncomfortable for humans. Further, in the region where the temperature is the highest, the increase in the rotational speed is increased. That is, when the rotational speed is high and the noise is loud and uncomfortable, the change in the increment of the noise is large and feels uncomfortable.

システムの起動時は冷却用ファンから電源を入れ、回転数を緩やかに上げて行く。回転
数が閾値を超えたらCPUなど他の装置の電源を入れる。これによりシステム立ち上げの
騒音の変化を低減し、不快感を少なくする。
When starting up the system, turn on the power from the cooling fan and gradually increase the rotational speed. When the rotation speed exceeds the threshold value, the power of other devices such as a CPU is turned on. This reduces changes in system startup noise and reduces discomfort.

また、回転数の増加率を回転数により変化させる。立ち上げ時を除き回転数が低く不快
感が少ない時は回転数の増加率も大きくし、回転数が高く不快感が大きい時は回転数の増
加率を小さくする。
Further, the rate of increase of the rotational speed is changed depending on the rotational speed. When the rotational speed is low and unpleasant, except when starting up, the increase rate of the rotational speed is increased, and when the rotational speed is high and uncomfortable, the rotational speed increase rate is decreased.

さらに、温度が低く騒音が小さい時は冷却ファンの回転数を規定より大きくし、温度の
上昇を抑える。これにより、システムの温度が上昇し冷却ファンの回転数が増え騒音が大
きくなる場合を減らすことが出来る。
Furthermore, when the temperature is low and the noise is low, the number of rotations of the cooling fan is made larger than specified to suppress the temperature rise. Thereby, the case where the temperature of the system rises and the number of rotations of the cooling fan increases to increase noise can be reduced.

システム立ち上げ時や冷却用ファン(104)で騒音が大きい時など人が音に対し敏感
な時はファンの回転数の増加率を少なくし、冷却用ファン(104)が低回転で騒音が小
さいく、人が騒音に対し許容可能な時は冷却ファンの回転数を増やし、高温になることを
抑えることにより冷却能力を保ったまま冷却ファンの騒音による不快感を減らすことが可
能となる。
When people are sensitive to sound, such as when the system starts up or when the cooling fan (104) is noisy, reduce the fan speed increase rate, and the cooling fan (104) is low and noise is low In addition, when a person can tolerate noise, the number of rotations of the cooling fan is increased to prevent the temperature from becoming high, thereby reducing the discomfort caused by the noise of the cooling fan while maintaining the cooling capacity.

冷却系のブロックを図1に示す。コンピュータ装置(100)の冷却機構は冷却対象装
置(101)と冷却対象装置(101)の温度を測る温度センサ(102)、温度データ
を記録するメモリ(103)、冷却対象装置(101)を冷却する冷却用ファン(104
)、温度センサ(102)から温度を読み込み、メモリ(103)に温度データを読み書
きし、冷却用ファン(104)の回転数を制御するコントローラ(105)から成る。
A block of the cooling system is shown in FIG. The cooling mechanism of the computer device (100) is a cooling target device (101), a temperature sensor (102) that measures the temperature of the cooling target device (101), a memory (103) that records temperature data, and a cooling target device (101). Cooling fan (104
), A controller (105) that reads the temperature from the temperature sensor (102), reads / writes temperature data into / from the memory (103), and controls the rotational speed of the cooling fan (104).

冷却対象(101)はCPU、GPU、HDDなどの単体、または、それらを纏めた複
数を対象とする。
The cooling target (101) is a single unit such as a CPU, GPU, HDD, or a plurality of them.

温度センサ(102)は冷却対象(101)に組み込まれているものや、別個に設ける
たものである。
The temperature sensor (102) is incorporated in the object to be cooled (101) or provided separately.

メモリ(103)は温度センサ(102)で測定した温度データを記録する。冷却用フ
ァン(104)の回転数を決めるための計算データの格納エリアとしても使用する。
The memory (103) records temperature data measured by the temperature sensor (102). It is also used as a storage area for calculation data for determining the number of rotations of the cooling fan (104).

冷却用ファン(104)は1個以上で構成し、コントローラ(105)によって回転数
を制御することが可能である。また、回転数が100%の時には如何なる高負荷時におい
ても冷却対象を許容温度内に十分冷却することが可能であるとする。
The cooling fan (104) is composed of one or more, and the number of rotations can be controlled by the controller (105). Further, it is assumed that the cooling target can be sufficiently cooled within the allowable temperature at any high load when the rotational speed is 100%.

コントローラ(105)は温度センサ(102)から温度データを読む事が可能で、温
度データをメモリ(103)に読み書きする事が可能である。コントローラ(105)は
冷却用ファン(104)の回転数を制御することが可能で、冷却用ファン(104)の回
転数を記憶しておくことが可能である。冷却用ファン(104)の制御のためにコントロ
ーラ(105)はメモリ(103)を使用することが可能である。
The controller (105) can read temperature data from the temperature sensor (102), and can read and write temperature data to and from the memory (103). The controller (105) can control the number of rotations of the cooling fan (104), and can store the number of rotations of the cooling fan (104). The controller (105) can use the memory (103) for controlling the cooling fan (104).

人間の耳は騒音の大きさの他に騒音の大きさの変化に対しても敏感であり、騒音が急に
大きくなると不快感を感じる。一方騒音が大きくても変化が少なければ慣れて行きさほど
気にならなくなる。そこで、騒音の大きさに関係のある冷却用ファン(104)の回転数
に着目し、システムを立ち上げ時に冷却用ファン(104)を回転し始める時と、高回転
時に回転数の増加率を抑える様にする。
The human ear is sensitive not only to the amount of noise but also to changes in the amount of noise, and feels uncomfortable when the noise suddenly increases. On the other hand, if the change is small even if the noise is loud, you will not be bothered to get used to it. Therefore, paying attention to the number of rotations of the cooling fan (104), which is related to the noise level, the rate of increase in the number of rotations when the cooling fan (104) starts rotating when the system is started up and when the rotation speed is high Try to suppress it.

図2は冷却用ファン(104)の回転数における回転数の増加率をグラフで現したもの
である。システムの立ち上げ時は回転数の増加率を小さくし、徐々に回転数を上げていく
。回転数が少なく騒音がさほど気にならない領域では回転数の増加率を大きくする。回転
数が大きくなり、騒音が不快に感じる領域に近づいたら回転数の増加率を低くする。以上
のことにより不快感の低減が可能である。
FIG. 2 is a graph showing the rate of increase in the number of rotations of the cooling fan (104). When starting up the system, reduce the rate of increase of the rotational speed and gradually increase the rotational speed. In a region where the rotational speed is low and noise is not a concern, the increase rate of the rotational speed is increased. When the rotational speed increases and approaches an area where noise is uncomfortable, the increase rate of the rotational speed is lowered. As described above, discomfort can be reduced.

図3は温度に対する冷却用ファン(104)の回転数を現したグラフである。301は
温度に対する最小回転数である。本方式では302で示す線で回転数の制御を行う。温度
が低く騒音に余裕があるときは冷却用ファン(104)の回転数を301より大きくし、
冷却能力を高め、温度上昇を抑える。温度が高いときは回転数の増分を少なくし、騒音の
発生を抑える。
FIG. 3 is a graph showing the number of rotations of the cooling fan (104) with respect to temperature. 301 is the minimum rotation speed with respect to temperature. In this method, the number of revolutions is controlled by a line 302. When the temperature is low and there is room for noise, the number of rotations of the cooling fan (104) is set higher than 301,
Increase cooling capacity and suppress temperature rise. When the temperature is high, increase the number of revolutions to reduce noise.

図3の制御方法を時間による温度変化で現すと図4になると考えられる。401は30
1に、402は302に対応する。この様に冷却能力を高めることにより全体的に温度を
下げることが出来る。
If the control method of FIG. 3 is expressed by a temperature change with time, it is considered that FIG. 4 is obtained. 401 is 30
1 and 402 correspond to 302. Thus, the temperature can be lowered as a whole by increasing the cooling capacity.

時間による冷却用ファン(104)の回転数で現すと図5になると考えられる。図4に
示すように図3、302の制御方法は温度が低くなるため高回転、つまり騒音の大きい時
に回転数を抑え騒音を小さくすることが出来ると考える。また、回転数の変化も少なく人
に与える不快感も小さい。
It can be considered that FIG. 5 shows the number of rotations of the cooling fan (104) according to time. As shown in FIG. 4, the control method of FIGS. 3 and 302 is considered to be able to suppress the rotation speed and reduce the noise when the rotation is high, that is, when the noise is large, because the temperature is low. In addition, there is little change in the number of revolutions, and the discomfort given to people is small.

冷却用ファン(104)の制御は図6に示すフローで行う。最初に冷却対象装置(10
1)の温度度を温度センサ(102)で測定し(601)、メモリ(103)に記録する
(602)。
The cooling fan (104) is controlled according to the flow shown in FIG. First, the device to be cooled (10
The temperature of 1) is measured by the temperature sensor (102) (601) and recorded in the memory (103) (602).

温度を測定(603)し、メモリ(103)に記録した前回測定した温度との差分を求
める(604)。差分を求めたら今回測定した温度をメモリ(103)に記録する(60
5)。
The temperature is measured (603), and the difference from the previously measured temperature recorded in the memory (103) is obtained (604). When the difference is obtained, the temperature measured this time is recorded in the memory (103) (60
5).

次に今回測定した温度から冷却用ファン(104)の回転数を決める。回転数を決める
には図3のグラフを使用する。604で求めた温度の差分が閾値以上かを求め(606)
、閾値以上ならば303を、閾値未満で有れば302で冷却用ファン(104)の回転数
を求める(607、608)。冷却用ファン(104)の回転数を求めるにあたり計算式
を用いてコントローラ(105)で計算して良いし、図3をテーブル化しメモリ(103
)に持ちテーブルから求めても良い。
Next, the rotational speed of the cooling fan (104) is determined from the temperature measured this time. The graph of FIG. 3 is used to determine the rotation speed. Determine whether the temperature difference obtained in step 604 is greater than or equal to the threshold (606)
If it is greater than or equal to the threshold value, 303 is obtained, and if it is less than the threshold value, 302 is obtained as the rotational speed of the cooling fan (104) (607, 608). In calculating the number of rotations of the cooling fan (104), it may be calculated by the controller (105) using a calculation formula, or FIG.
) May be obtained from the holding table.

次に冷却用ファン(104)の回転数を変更する。604で求めた温度変化で温度が上
昇しているかを調べる(609)。温度が上昇していれば図2から冷却用ファン(104
)の回転数の変化率を求め(611)、求めた変化率で回転数を変更する(612)。温
度が上昇していない時は304で求めた回転数に変更する(610)。温度が下がった時
に回転数の変化率に制限を設けないのは回転数が下がる、つまり騒音が小さくなる方向の
変化のためである。
Next, the rotation speed of the cooling fan (104) is changed. It is examined whether the temperature is rising due to the temperature change obtained in 604 (609). If the temperature rises, the cooling fan (104
) Is determined (611), and the rotational speed is changed at the determined change rate (612). When the temperature has not risen, the rotational speed obtained in 304 is changed (610). The reason why the speed change rate is not limited when the temperature is lowered is because the speed decreases, that is, the noise is reduced.

以上の方法によりシステムの立ち上げ時と騒音が大きい時に冷却用ファン(104)の
回転数の変化を少なくすることが可能になり、騒音による不快感を減らす効果がある。ま
た、温度が上昇して行く過程においても回転数の変化を少なくすることが出来、騒音によ
る不快感を減らす効果がある。
The above method makes it possible to reduce the change in the rotational speed of the cooling fan (104) when the system is started up and when the noise is high, and has the effect of reducing discomfort due to noise. In addition, the change in the rotational speed can be reduced even in the process of increasing the temperature, and there is an effect of reducing discomfort due to noise.

冷却システムのブロック図である。It is a block diagram of a cooling system. 現時点の温度に対する冷却用ファンの回転数の増加率を示す図である。It is a figure which shows the increase rate of the rotation speed of the cooling fan with respect to the present temperature. 温度に対する冷却用ファンの回転数を示す図である。It is a figure which shows the rotation speed of the cooling fan with respect to temperature. 時間に対する温度変化を示す図である。It is a figure which shows the temperature change with respect to time. 時間に対する冷却用ファンの回転数の変化を示す図である。It is a figure which shows the change of the rotation speed of the cooling fan with respect to time. 冷却用ファンの制御フローである。It is a control flow of the cooling fan.

符号の説明Explanation of symbols

301…最小の回転数、302…実際の回転数、303…温度急上昇時の回転数、40
1…301で制御した時の温度変化、402…302で制御した時の温度変化、501…
301で制御した時の回転数変化、502…302で制御した時の回転数変化。
301: Minimum number of rotations 302: Actual number of rotations 303: Number of rotations when temperature suddenly rises, 40
1... Temperature change when controlled by 301, 402. Temperature change when controlled by 302, 501.
Rotational speed change when controlled by 301, Rotational speed change when controlled by 502 ... 302.

Claims (1)

コンピュータ装置において冷却用のファンと温度センサを持ち温度センサで測定した温
度をメモリに記録し、温度変化を求め現在の温度と温度変化の値から回転数をコントロー
ラで制御する冷却用ファンの制御方法。
Cooling fan control method in which a computer has a cooling fan and a temperature sensor, records the temperature measured by the temperature sensor in a memory, obtains the temperature change, and controls the rotation speed from the current temperature and the value of the temperature change with a controller .
JP2007003988A 2007-01-12 2007-01-12 Control method for cooling fan in computer device Pending JP2008171219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007003988A JP2008171219A (en) 2007-01-12 2007-01-12 Control method for cooling fan in computer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007003988A JP2008171219A (en) 2007-01-12 2007-01-12 Control method for cooling fan in computer device

Publications (1)

Publication Number Publication Date
JP2008171219A true JP2008171219A (en) 2008-07-24

Family

ID=39699251

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007003988A Pending JP2008171219A (en) 2007-01-12 2007-01-12 Control method for cooling fan in computer device

Country Status (1)

Country Link
JP (1) JP2008171219A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010277406A (en) * 2009-05-29 2010-12-09 Fujitsu Ltd Information processor and information processing method
JP2012186225A (en) * 2011-03-03 2012-09-27 Fujitsu Ltd Air flow controller, air flow control method and air flow control program

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010277406A (en) * 2009-05-29 2010-12-09 Fujitsu Ltd Information processor and information processing method
JP2012186225A (en) * 2011-03-03 2012-09-27 Fujitsu Ltd Air flow controller, air flow control method and air flow control program
US9078377B2 (en) 2011-03-03 2015-07-07 Fujitsu Limited Air volume control device and air volume control method

Similar Documents

Publication Publication Date Title
JP3769200B2 (en) Cooling fan control method and apparatus
JP5177896B2 (en) Fan dynamic rotational speed control device, fan dynamic rotational speed control method, and fan dynamic rotational speed control program
US20180310434A1 (en) Apparatus for dynamic positioning of a fan to reduce noise
US7974743B2 (en) Temperature controlling apparatus, information processing apparatus, and recording medium
US7890219B2 (en) Cooling fan with speed maintained during wait period despite decreasing temperature
JP4384182B2 (en) Fan speed control method
US20080181433A1 (en) Noise reduction in a system
JPWO2008093606A1 (en) Nonvolatile storage device, nonvolatile storage system, and access device
TWI481982B (en) Processor temperature controlling method and controller
US10888022B2 (en) Fan speed control in electronic devices
CN110637271B (en) Systems and methods for intelligent adjustment of immersive multimedia workloads in portable computing devices
JP4564966B2 (en) Power saving method and system
JP2005174203A (en) Data transfer rate controller for performing setting related with memory access, information processor, control method, program and recording medium
US20080306633A1 (en) Optimized power and airflow multistage cooling system
JP2008525925A (en) Method and apparatus for controlling noise generating components
JP2008171219A (en) Control method for cooling fan in computer device
TWI589112B (en) Fan controlling method of electronic device
US11720154B2 (en) Environmental and temperature based computing device fan adjustments
CN115492674A (en) Control method and device for electric water pump and cooling fan
JP2011199205A (en) Electronic apparatus
JP6725576B2 (en) Cooling system and electronic equipment
JP2006323761A (en) Computer device, communication device, and power consumption control method using same
CN116917839A (en) Custom thermal throttling using ambient conditions
JP2006252608A (en) Cooling device of optical disk drive, and optical disk drive
JP2007187147A (en) Control method for fan