JPS6220014A - Control system for number of revolution of cooling fan - Google Patents
Control system for number of revolution of cooling fanInfo
- Publication number
- JPS6220014A JPS6220014A JP60159901A JP15990185A JPS6220014A JP S6220014 A JPS6220014 A JP S6220014A JP 60159901 A JP60159901 A JP 60159901A JP 15990185 A JP15990185 A JP 15990185A JP S6220014 A JPS6220014 A JP S6220014A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- cooling fan
- voltage
- information processing
- processing device
- 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.)
- Granted
Links
Classifications
-
- 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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Temperature (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
冷却ファン回転数制御方式であって、情報処理装置の吸
気温度の変化に応じて冷却ファン回転数を切り換えるよ
うに構成し、該情報処理装置内のユニット台数に関係な
く低気温時に冷却ファンを低速回転させて冷却ファンの
低騒音化及び長寿命化を可能とする。[Detailed Description of the Invention] [Summary] A cooling fan rotation speed control system, which is configured to switch the cooling fan rotation speed according to changes in intake air temperature of an information processing device, and is configured to change the number of units in the information processing device. To make it possible to reduce noise and extend the life of a cooling fan by rotating the cooling fan at low speed when the temperature is low regardless of the temperature.
本発明は情報処理装置の冷却ファンの回転数を制御する
方式に関するもので、さらに詳しく言えば、情報処理装
置に内蔵するユニットの台数に拘わらず該ユニットの正
常な動作を確保しながら冷却ファンの回転数を低速回転
とし得る冷却ファン回転数制御方式に関するものである
。The present invention relates to a system for controlling the rotation speed of a cooling fan in an information processing device, and more specifically, the present invention relates to a system for controlling the rotation speed of a cooling fan in an information processing device. The present invention relates to a cooling fan rotation speed control method that can reduce the rotation speed to a low speed.
情報処理装置の内部は1個ないし複数個の各種ユニット
即ちディスクドライブ、電源やCPU(中央処理装置)
等の組み合わせにより構成されている。Inside an information processing device, there are one or more various units, such as a disk drive, a power supply, and a CPU (central processing unit).
It is composed of a combination of etc.
情報処理装置において正常な動作を確保するためには、
該情報処理装置の内部を一定温度以下に維持する必要が
ある。To ensure normal operation of information processing equipment,
It is necessary to maintain the inside of the information processing device below a certain temperature.
冷却方式としては、特に比較的小型の情報処理装置にあ
っては空冷式が採用される。空冷式では、冷却ファンが
使用される。As a cooling method, an air cooling method is adopted especially for relatively small information processing devices. Air-cooled systems use cooling fans.
冷却ファンの性能即ち大きさや回転数等は、情報処理装
置が使用される最高外気温度を想定して設定されるが、
通常該情報処理装置はこの条件よりも有利な即ち気温が
低い環境で稼働している。The performance of the cooling fan, such as its size and rotation speed, is set assuming the maximum outside temperature at which the information processing device will be used.
Usually, the information processing apparatus is operated in an environment that is more favorable than this condition, that is, in an environment where the temperature is lower.
従って、冷却ファン回転数制御方式を採ることにより、
上記条件が有利な場合に冷却ファンを低速回転として、
低騒音化及び長寿命化が図られる。Therefore, by adopting a cooling fan rotation speed control method,
When the above conditions are favorable, the cooling fan is rotated at low speed.
Lower noise and longer life are achieved.
冷却ファン回転数制御方式として第1の従来例を第4図
に示す。図において情報処理装置lにユニッI−A、ユ
ニットB及びユニットCが内蔵しである。冷却ファン2
によって吸気口3から冷却用空気が情報処理装置1内に
取り込まれ、この空気は各ユニ・ノドA、B、Cを冷却
した後排気部4から排気される。この冷却ファン回転数
制御方式にあっては排気部4内に温度センサ5を取り付
け、該温度センサ5で検知した排気温度に応じて、温度
・電圧変換回路6により冷却ファン2の回転数を制御す
る。A first conventional example of a cooling fan rotation speed control method is shown in FIG. In the figure, an information processing device 1 includes a unit I-A, a unit B, and a unit C. cooling fan 2
Cooling air is taken into the information processing device 1 from the intake port 3, and after cooling each unit node A, B, and C, it is exhausted from the exhaust section 4. In this cooling fan rotation speed control method, a temperature sensor 5 is installed inside the exhaust section 4, and the rotation speed of the cooling fan 2 is controlled by a temperature/voltage conversion circuit 6 according to the exhaust temperature detected by the temperature sensor 5. do.
温度・電圧変換回路6としては、排気温度に比例して冷
却ファン2に供給する電圧ないし冷却ファン2の回転数
を変化させる回路を用いる場合と、いわゆるbang−
bang制御即ち排気温度が一定温度以上に上昇したら
冷却ファン2を高速回転に切り換える回路を用いる場合
がある。As the temperature/voltage conversion circuit 6, a circuit that changes the voltage supplied to the cooling fan 2 or the rotation speed of the cooling fan 2 in proportion to the exhaust temperature may be used;
Bang control, that is, a circuit that switches the cooling fan 2 to high speed rotation when the exhaust gas temperature rises above a certain temperature may be used.
第5図に示す第2の従来例は第4図の変形であり、ユニ
ッl−A、B、C毎に排気温度を温度センサ5により検
知している。A second conventional example shown in FIG. 5 is a modification of the one shown in FIG. 4, in which exhaust temperature is detected for each unit A, B, and C by a temperature sensor 5.
冷却ファン回転数制御方式として第3の従来例を第6図
に示す。図において情報処理装置lに内蔵するユニット
A、B、Cのそれぞれ自体に温度センサ5を取り付け、
これらの温度センサ5で検知した冷却対象ユニソI−A
、B、C内の温度に応じて、温度・電圧変換回路6によ
り冷却ファン2の回転数を制御する。A third conventional example of a cooling fan rotation speed control method is shown in FIG. In the figure, a temperature sensor 5 is attached to each of units A, B, and C built in the information processing device l,
The cooling target Uniso I-A detected by these temperature sensors 5
, B, and C, the temperature/voltage conversion circuit 6 controls the rotation speed of the cooling fan 2.
冷却ファン回転数制御方式として第4の従来例を第7図
に示す。図において排気部4内と各ユニッl−A、B、
C内のそれぞれに温度センサ5を取り付け、該温度セン
サ5で検知したそれぞれの温度に応じて、温度・電圧変
換回路6により冷却ファン2の回転数を制御する。A fourth conventional example of a cooling fan rotation speed control method is shown in FIG. In the figure, inside the exhaust section 4 and each unit l-A, B,
A temperature sensor 5 is attached to each of the cooling fans 2 and 3, and the rotation speed of the cooling fan 2 is controlled by a temperature/voltage conversion circuit 6 according to each temperature detected by the temperature sensor 5.
第4図に示す第1の従来方式では次のような問題点があ
る。The first conventional method shown in FIG. 4 has the following problems.
(1)情報処理装置1の内部は上記のごとく一般に各種
ユニット即ちディスクドライブ、電源やCPU等の組み
合わせにより構成されている。(1) As described above, the inside of the information processing device 1 is generally composed of a combination of various units, such as a disk drive, a power supply, and a CPU.
この場合において、情報処理装置1内には一般には複数
のユニットが内蔵されることを予定しである。第4図の
例では最大3個のユニットA、B、Cが内蔵される。In this case, the information processing device 1 is generally expected to include a plurality of units. In the example shown in FIG. 4, a maximum of three units A, B, and C are built-in.
しかし、このように予定した最大個数のユニットが必ず
実装されるとは限らず、情報処理装置総体に許容される
価格の制約の下で設定するシステムの機能や性能に応じ
て、例えばメモリ容量、チャネル台数、入出力装置台数
等に基づいて、ユニット台数が変化するのが一般的であ
る。However, it is not always the case that the planned maximum number of units will be implemented, and depending on the functions and performance of the system set up under the price constraints allowed for the entire information processing device, for example, the memory capacity, Generally, the number of units changes based on the number of channels, the number of input/output devices, etc.
第8図は、第4図の情報処理装置1においてシステムの
構成に応じてユニットAのみが内蔵されている場合を示
す。FIG. 8 shows a case where only the unit A is built in the information processing apparatus 1 of FIG. 4 depending on the system configuration.
排気部4における排気温度は情報処理装置1内のユニッ
ト台数により第9図に示すように変化する。即ち同一吸
気温度の条件下で、ユニット台数が少なくなるほど排気
温度の上昇は小さい。The exhaust temperature in the exhaust section 4 changes depending on the number of units in the information processing device 1, as shown in FIG. That is, under the same intake air temperature condition, the smaller the number of units, the smaller the increase in exhaust temperature.
そこで、システムの構成に応じてユニット台数が変化し
得る事情の下で、冷却ファン回転数制御方式として第4
図に示すように情報処理装置1の排気部4の1点のみで
温度検出を行うようにすると、ユニット台数が少ない場
合即ち排気温度が余り上昇しない場合でも、ユニット台
数が多い場合があることを考慮して、冷却ファンを高速
回転にする必要がある。Therefore, under the circumstances where the number of units can change depending on the system configuration, we decided to adopt the fourth cooling fan rotation speed control method.
As shown in the figure, if the temperature is detected at only one point, the exhaust section 4 of the information processing device 1, the number of units may be large even if the number of units is small, that is, the exhaust temperature does not rise much. With this in mind, it is necessary to rotate the cooling fan at high speed.
従って、冷却ファンの低騒音化及び長寿命化の効果が乏
しいという問題点がある。Therefore, there is a problem in that the effect of reducing noise and extending the life of the cooling fan is poor.
(2)上記(1)の問題点を解決するために、情報処理
装置1内のユニット台数に応じて、温度・電圧変換回路
6における排気温度から冷却ファン回転数への変換のパ
ラメータを変化させて正確な制御を図ると、回路構成が
複雑になり、その結果当該情報処理装置のコストアップ
と低信顛化を招くという問題点がある。(2) In order to solve the problem in (1) above, the parameters for converting the exhaust temperature into the cooling fan rotation speed in the temperature/voltage conversion circuit 6 are changed depending on the number of units in the information processing device 1. If accurate control is attempted by using the information processing apparatus, the circuit configuration becomes complicated, resulting in an increase in cost and a decrease in reliability of the information processing apparatus.
(3)温度・電圧変換回路6として、排気温度に比例し
て冷却ファン2に供給する電圧ないし冷却ファン2の回
転数を変化させる回路を用いる場合には、回路構成が複
雑になり、その結果当該情報処理装置のコストアップを
招くという問題点がある。(3) When using a circuit that changes the voltage supplied to the cooling fan 2 or the rotation speed of the cooling fan 2 in proportion to the exhaust temperature as the temperature/voltage conversion circuit 6, the circuit configuration becomes complicated, and as a result, There is a problem in that the cost of the information processing device increases.
(4)温度・電圧変換回路6としてbang−bang
制御を用いる場合には、冷却ファン2の回転数を切り換
える温度付近で当該回転数が不安定となり、従って、耳
障りなうなり音が発生するという問題点がある。(4) Bang-bang as temperature/voltage conversion circuit 6
When control is used, there is a problem in that the rotation speed of the cooling fan 2 becomes unstable near the temperature at which the rotation speed is changed, resulting in generation of a harsh humming sound.
次に、第5図に示す第2の従来方式では、1回路当りの
部品点数が増加して情報処理装置のコストアップとなる
という問題点がある他に、第4図の従来方式について上
記に説明をしたものと同様の問題点がある。Next, the second conventional method shown in FIG. 5 has the problem that the number of parts per circuit increases, which increases the cost of the information processing device. I have the same problem as the one you described.
次に第6図に示す第3の従来方式では、情報処理装置内
の主な発熱点が多数ある場合及び情報処理装置が複数の
ユニットで構成されている場合には発熱点及びユニット
毎に温度センサを設けることが必要であるため、情報処
理装置のコストアップとなるという問題点がある他に、
第4図の従来方式について上記(3)及び(4)に説明
をしたものと同様の問題点がある。Next, in the third conventional method shown in Fig. 6, when there are many main heat generating points in an information processing device or when the information processing device is composed of multiple units, the temperature is set for each heat generating point and unit. In addition to the problem of increasing the cost of the information processing device because it is necessary to provide a sensor,
The conventional method shown in FIG. 4 has the same problems as those explained in (3) and (4) above.
次に第7図に示す第4の従来方式は第4図及び第6図の
方式の問題点を解決していないばかりでなく、回路構成
が一層複雑となるという問題点がある。Next, the fourth conventional system shown in FIG. 7 not only does not solve the problems of the systems shown in FIGS. 4 and 6, but also has the problem that the circuit configuration becomes even more complicated.
本発明は、このような点に鑑みて創作されたもので、簡
易な構成で情報処理装置への流入空気の温度に応じて冷
却ファンを低速回転させて、冷却ファンの低騒音化及び
長寿命化が可能な冷却ファン回転数制御方式を提供する
ことを目的としている。The present invention was created in view of these points, and has a simple configuration that rotates a cooling fan at a low speed according to the temperature of air flowing into an information processing device, thereby reducing noise and extending the life of the cooling fan. The purpose of this project is to provide a cooling fan rotation speed control method that can be
第1図は本発明の冷却ファン回転数制御方式の原理説明
図を示す。FIG. 1 shows an explanatory diagram of the principle of the cooling fan rotation speed control system of the present invention.
第1図において温度センサ5は吸気口3の近傍の位置に
設けられる。尚lOは該吸気口3に取り付けたエアフィ
ルタを示す。In FIG. 1, a temperature sensor 5 is provided near the intake port 3. As shown in FIG. Note that lO indicates an air filter attached to the intake port 3.
該温度センサ5により検知された温度即ち吸気温度Tを
示す信号は温度・電圧変換回路11に送られる。A signal indicating the temperature detected by the temperature sensor 5, that is, the intake air temperature T, is sent to the temperature/voltage conversion circuit 11.
該温度・電圧変換回路11には、温度・電圧変換回路1
1の変換特性に回転数切り換え温度近辺でヒステリシス
を持たせるために変換モード制御回路12が接続しであ
る。The temperature/voltage conversion circuit 11 includes a temperature/voltage conversion circuit 1
A conversion mode control circuit 12 is connected in order to give the conversion characteristic of No. 1 hysteresis near the rotational speed switching temperature.
温度・電圧変換回路11は、上記信号における吸気温度
Tが上昇して既定の動作温度T1以上になったとき、冷
却ファン2に供給する電圧■を高電圧V、に切り換え、
また吸気温度Tが降下して該動作温度T、よりも低い復
帰温度T2以下になったとき、該電圧Vを低電圧v2に
切り換えるように動作する。The temperature/voltage conversion circuit 11 switches the voltage ■ supplied to the cooling fan 2 to a high voltage V when the intake air temperature T in the above signal increases and becomes equal to or higher than the predetermined operating temperature T1.
Further, when the intake air temperature T decreases to below the return temperature T2, which is lower than the operating temperature T, the voltage V is switched to the low voltage v2.
第2図の一部は、動作温度T1及び復帰温度T2をそれ
ぞれ1つずつ設定した場合における上記吸気温度Tと電
圧■との関係を示す。尚第2図においてToは、熱設計
上当該情報処理装置1が安全に作動し得る室温ないし吸
気温度Tの上限値即ち最高外気温度を示す。A part of FIG. 2 shows the relationship between the intake air temperature T and the voltage (2) when one operating temperature T1 and one return temperature T2 are set. In FIG. 2, To indicates the upper limit of the room temperature or intake air temperature T at which the information processing device 1 can operate safely in terms of thermal design, that is, the maximum outside air temperature.
まず、吸気温度Tが上昇して動作温度T1以上になると
、温度・電圧変換回路11の動作によリ、冷却ファン2
に供給する電圧■は高電圧■1になる。従って、冷却フ
ァン2が高速回転となり、その結果、動作温度T1以上
の温度条件下で電圧Vを低電圧V2に留どめた場合即ち
第2図の想像線aと比較して、各ユニット内の温度Tj
は低くなる。従って、このように比較的に高温の条件に
おいて各ユニットの冷却効果を高めて、情報処理装置の
正常な動作を確保し得る。First, when the intake air temperature T rises and becomes equal to or higher than the operating temperature T1, the cooling fan 2
The voltage ■ supplied to is a high voltage ■1. Therefore, the cooling fan 2 rotates at high speed, and as a result, when the voltage V is kept at a low voltage V2 under the operating temperature condition of T1 or higher, in other words, compared to the imaginary line a in FIG. temperature Tj
becomes lower. Therefore, under such relatively high temperature conditions, the cooling effect of each unit can be enhanced to ensure normal operation of the information processing device.
次に、吸気温度Tが降下して復帰温度T、以下になると
、温度・電圧変換回路11の動作により、冷却ファン2
に供給する電圧■は低電圧V2になり、従って、冷却フ
ァン2が低速回転となる。Next, when the intake air temperature T decreases to below the return temperature T, the temperature/voltage conversion circuit 11 operates to cause the cooling fan 2 to
The voltage (2) supplied to the cooling fan 2 becomes a low voltage V2, and therefore the cooling fan 2 rotates at a low speed.
従って、このように比較的に低温の条件において低騒音
化、冷却ファンの長寿命化、並びに電圧低下による省エ
ネルギー化を図ることができる。Therefore, under such relatively low-temperature conditions, it is possible to reduce noise, extend the life of the cooling fan, and save energy due to voltage drop.
復帰温度T2は動作温度T1よりも低い温度に設定しで
あるから、該復帰温度T2及び動作温度T、の近傍の温
度において冷却ファン2の回転数が頻繁に変化すること
がなく、従って、うなり音がなくなり、低騒音化の降下
が大きい。Since the return temperature T2 is set to a temperature lower than the operating temperature T1, the rotation speed of the cooling fan 2 does not change frequently at temperatures near the return temperature T2 and the operating temperature T. There is no sound, and the reduction in noise level is significant.
第3図は本発明の実施例であって、情報処理装置1の筐
体IAを壁20の壁際に設置した状態を示す。FIG. 3 shows an embodiment of the present invention, in which the casing IA of the information processing device 1 is installed near a wall 20. As shown in FIG.
第3図において吸気口3は筐体IAの底面に設けである
。該吸気口3の内面に取り付けたエアフィルタ10の直
近上方位置のダクト内に、サーミスタからなる温度セン
サ5が設けてあり、該温度センサ5にほこりが付くこと
により温度検出機能が低下することを防止している。In FIG. 3, the intake port 3 is provided on the bottom surface of the housing IA. A temperature sensor 5 consisting of a thermistor is provided in the duct immediately above the air filter 10 attached to the inner surface of the intake port 3, and the temperature detection function is prevented from being degraded due to dust adhering to the temperature sensor 5. It is prevented.
温度・電圧変換回路11及び変換モード制御回路12は
、バラコントローラを構成するプリント板に実装されて
いる。The temperature/voltage conversion circuit 11 and the conversion mode control circuit 12 are mounted on a printed board constituting the individual controller.
変換モード制御回路12の制御の下で温度・電圧変換回
路11で設定する動作温度T、は、該情報処理装置1が
稼働する温度環境によって異なるが、冷却ファンとして
のDCファン2Aの高速動作時間が、冷暖房期間を含め
年間を通じて最小になるように設定する。The operating temperature T set by the temperature/voltage conversion circuit 11 under the control of the conversion mode control circuit 12 varies depending on the temperature environment in which the information processing device 1 operates, but the high-speed operation time of the DC fan 2A as a cooling fan is set so that it is kept to a minimum throughout the year, including the heating and cooling period.
21は電源ユニットであり、温度センサ11の指令に基
づいてDCファン2Aに高電圧v宜または低電圧■2の
電源を供給する。両型圧V1、V2としては、第2図に
おいて低電圧v2の下での冷却対象ユニットの最高温度
TJ、が、高電圧■1の下での冷却対象ユニットの最高
温度T j +より高くならないような電圧に設定する
。例えば、高電圧■、として12V、低電圧v2として
8Vである。Reference numeral 21 denotes a power supply unit, which supplies power at a high voltage V or a low voltage 2 to the DC fan 2A based on a command from the temperature sensor 11. As for both mold pressures V1 and V2, in Fig. 2, the maximum temperature TJ of the unit to be cooled under low voltage v2 does not become higher than the maximum temperature T j + of the unit to be cooled under high voltage 1. Set the voltage to For example, the high voltage (2) is 12V, and the low voltage (v2) is 8V.
変換モード制御回路12は、また、情報処理装置1の電
源投入時のみには、DCファン2Aのモータの駆動トル
クを確保するために、温度センサ5による検知温度に拘
わらず高速回転モードとなるように作動する。The conversion mode control circuit 12 is also configured to operate in a high-speed rotation mode only when the power of the information processing device 1 is turned on, regardless of the temperature detected by the temperature sensor 5, in order to ensure the driving torque of the motor of the DC fan 2A. It operates.
DCファン2Aにより送られる冷却用空気は筐体IA内
で各ユニットを冷却した後、筺体IAの背面の排気部4
から壁2oに向けて矢印22に示すように排気される。The cooling air sent by the DC fan 2A cools each unit within the housing IA, and then is sent to the exhaust section 4 on the back of the housing IA.
The air is exhausted from the air toward the wall 2o as shown by an arrow 22.
23は、筺体IAの背面下部において、矢印22に示す
排気の一部が壁2oに沿って下降して吸気口3にまわり
こむ事を防止するためのスカートである。Reference numeral 23 denotes a skirt at the lower back surface of the housing IA for preventing a part of the exhaust gas shown by the arrow 22 from descending along the wall 2o and entering the intake port 3.
この実施例の冷却ファン回転数制御方式は上記のように
構成されているので、室温が最高外気温度または高温時
には高電圧12VにてDCファン2Aを駆動することに
より冷却効果を高め、室温が低温時即ち一般的な温度環
境下では低電圧8■にてDCファン2Aを駆動すること
により低騒音化、冷却ファンの長寿命化及び省エネルギ
ー化が図られる。変換モード制御回路12を取り付ける
ことによりDCファン2Aの回転にうなりが生ぜず、低
騒音化に貢献し得る。Since the cooling fan rotation speed control method of this embodiment is configured as described above, when the room temperature is the maximum outside temperature or high temperature, the cooling effect is enhanced by driving the DC fan 2A with a high voltage of 12V, and the room temperature is reduced to a low temperature. In other words, under a general temperature environment, driving the DC fan 2A at a low voltage of 8.5 m makes it possible to reduce noise, extend the life of the cooling fan, and save energy. By attaching the conversion mode control circuit 12, no beat occurs in the rotation of the DC fan 2A, which can contribute to lower noise.
本発明の冷却ファン回転数制御方式は一般には複数の動
作温度及び復帰温度を設定することができるが、この実
施例では1段階制御をとっている。従って、回路構成が
単純になり、情報処理装置の低コスト化及び高信頼性を
もたらす。Although the cooling fan rotation speed control system of the present invention can generally set a plurality of operating temperatures and return temperatures, this embodiment employs one-stage control. Therefore, the circuit configuration becomes simple, resulting in low cost and high reliability of the information processing device.
この冷却ファン回転数制御方式では、温度センサ5とし
ては情報処理装置1の吸気口3に1個設けるだけで、当
該情報処理装置1内に構成し得る各種のユニット構成に
対応することができ、この点においても情報処理装置の
低コスト化及び高信頼性を図り得る。In this cooling fan rotation speed control method, by simply providing one temperature sensor 5 at the intake port 3 of the information processing device 1, it is possible to correspond to various unit configurations that can be configured in the information processing device 1. In this respect as well, it is possible to reduce the cost and increase the reliability of the information processing device.
情報処理装置を壁際に設置する場合でも、排気のまわり
こみにより温度センサ5の温度上昇がない構造となって
いるから、室温を正確に測定することができ、的確な電
圧切り換えが可能である。Even when the information processing device is installed near a wall, the structure is such that the temperature of the temperature sensor 5 does not rise due to exhaust gas flowing around, so the room temperature can be accurately measured and voltage switching can be performed accurately.
以上述べてきたように、本発明によれば、簡単な高速回
転で、情報処理装置内の冷却対象ユニットの台数に関係
なく、低コストで単純なりang−bang制御をする
ことができ、高信頼性の下で低騒音化及び長寿命化が可
能であり、実用的には極めて有用である。As described above, according to the present invention, it is possible to perform simple ang-bang control at low cost and with high reliability regardless of the number of units to be cooled in an information processing device with simple high-speed rotation. It is possible to reduce noise and extend the lifespan under the same conditions, and is extremely useful from a practical point of view.
第1図は本発明の冷却ファン回転数制御方式%式%
第2図は吸気温度と電圧及びユニットの温度との関係を
示すグラフ、
第3図は本発明の実施例を示す断面図、第4図から第7
図まではそれぞれ異なる従来例を示す説明図、
第8図は第4図の従来例においてシステム構成に応じて
ユニット数が変わることを示す説明図、第9図は第4図
の従来例においてユニット台数により排気温度が変化す
ることを示すグラフである。
第1図及び第2図において、
2は冷却ファン、
3は吸気口、
5は温度センサ、
11は温度・電圧変換回路、
12は変換モード制御回路、
A、B、Cは冷却対象のユニ、ト、
Tは吸気温度、
T1は動作温度、
T2は復帰温度、
■は冷却ファンに供給する電圧、
Vlは高電圧、
■2は低電圧である。Fig. 1 is a graph showing the relationship between intake air temperature, voltage, and unit temperature, and Fig. 3 is a cross-sectional view showing an embodiment of the present invention. Figures 4 to 7
The figures up to the figure are explanatory diagrams showing different conventional examples, FIG. 8 is an explanatory diagram showing that the number of units changes depending on the system configuration in the conventional example in FIG. It is a graph showing that exhaust gas temperature changes depending on the number of vehicles. 1 and 2, 2 is a cooling fan, 3 is an intake port, 5 is a temperature sensor, 11 is a temperature/voltage conversion circuit, 12 is a conversion mode control circuit, A, B, and C are units to be cooled. T is the intake air temperature, T1 is the operating temperature, T2 is the return temperature, (2) is the voltage supplied to the cooling fan, V1 is the high voltage, and (2) is the low voltage.
Claims (1)
(A、B、C)を内蔵し、且つ該ユニット(A、B、C
)を冷却ファン(2)で吸気口(3)から取り入れた空
気により冷却している情報処理装置において、 該吸気口(3)近傍の該空気の温度(T)を検知する温
度センサ(5)と、 該温度センサ(5)の信号を受けて該冷却ファン(2)
に供給する電圧(V)を切り換える温度・電圧変換回路
(11)と、 該温度・電圧変換回路(11)の変換特性にヒステリシ
スを持たせる変換モード制御回路(12)とを具備し、 該温度(T)が上昇して動作温度(T_1)以上になっ
たとき該電圧(V)を高電圧(V_1)に切り換え、且
つ該温度(T)が降下して該動作温度(T_1)よりも
低い復帰温度(T_2)以下になったとき該電圧(V)
を低電圧(V_2)に切り換えることを特徴とする冷却
ファン回転数制御方式。[Claims] One or more units (A, B, C) are built-in according to the configuration of the system, and the unit (A, B, C
) is cooled by air taken in from an intake port (3) by a cooling fan (2), and a temperature sensor (5) that detects the temperature (T) of the air near the intake port (3). and, upon receiving the signal from the temperature sensor (5), the cooling fan (2)
The temperature/voltage conversion circuit (11) switches the voltage (V) supplied to the temperature/voltage conversion circuit (11), and the conversion mode control circuit (12) provides hysteresis to the conversion characteristics of the temperature/voltage conversion circuit (11). When (T) increases and becomes equal to or higher than the operating temperature (T_1), the voltage (V) is switched to a high voltage (V_1), and the temperature (T) decreases and becomes lower than the operating temperature (T_1). The voltage (V) when the temperature drops below the reset temperature (T_2)
A cooling fan rotation speed control method characterized by switching the voltage to a low voltage (V_2).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60159901A JPS6220014A (en) | 1985-07-19 | 1985-07-19 | Control system for number of revolution of cooling fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60159901A JPS6220014A (en) | 1985-07-19 | 1985-07-19 | Control system for number of revolution of cooling fan |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6220014A true JPS6220014A (en) | 1987-01-28 |
JPH04291B2 JPH04291B2 (en) | 1992-01-07 |
Family
ID=15703645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60159901A Granted JPS6220014A (en) | 1985-07-19 | 1985-07-19 | Control system for number of revolution of cooling fan |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6220014A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01144109A (en) * | 1987-11-30 | 1989-06-06 | Nec Corp | Cooling structure for electronic equipment |
JPH03238515A (en) * | 1990-02-15 | 1991-10-24 | Koufu Nippon Denki Kk | Pos terminal equipment |
JP2007300037A (en) * | 2006-05-08 | 2007-11-15 | Bit-Isle Inc | Rack and air conditioning control system |
JP2009294957A (en) * | 2008-06-05 | 2009-12-17 | Fujitsu Ltd | Storage device, information processor, and cooling method |
JP2011151131A (en) * | 2010-01-20 | 2011-08-04 | Fujitsu Ltd | Cooling controlling apparatus, electronic apparatus, and cooling controlling method |
JP2012253066A (en) * | 2011-05-31 | 2012-12-20 | Mitsubishi Electric Corp | Air-cooling communication apparatus |
JP2013131236A (en) * | 2013-03-07 | 2013-07-04 | Nec Corp | Electrical equipment |
JP2014115012A (en) * | 2012-12-10 | 2014-06-26 | Nec Corp | Fan control device |
JP2014197423A (en) * | 2014-07-08 | 2014-10-16 | 日本電気株式会社 | Electrical apparatus |
US9377026B2 (en) | 2011-02-25 | 2016-06-28 | Nec Corporation | Electric device including an electric fan and a control unit for controlling the electric fan |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5714499U (en) * | 1980-06-30 | 1982-01-25 | ||
JPS5858625U (en) * | 1982-04-22 | 1983-04-20 | 日本電気株式会社 | electronic equipment cooling equipment |
JPS5979744U (en) * | 1982-11-19 | 1984-05-30 | ダイキン工業株式会社 | air conditioner |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5361385A (en) * | 1976-11-15 | 1978-06-01 | Matsushita Electric Ind Co Ltd | Synchronous rectifying ciruit in unbalance measuring apparatus |
JPS5858625B2 (en) * | 1980-05-08 | 1983-12-26 | 株式会社日立製作所 | signal processing device |
-
1985
- 1985-07-19 JP JP60159901A patent/JPS6220014A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5714499U (en) * | 1980-06-30 | 1982-01-25 | ||
JPS5858625U (en) * | 1982-04-22 | 1983-04-20 | 日本電気株式会社 | electronic equipment cooling equipment |
JPS5979744U (en) * | 1982-11-19 | 1984-05-30 | ダイキン工業株式会社 | air conditioner |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01144109A (en) * | 1987-11-30 | 1989-06-06 | Nec Corp | Cooling structure for electronic equipment |
JPH03238515A (en) * | 1990-02-15 | 1991-10-24 | Koufu Nippon Denki Kk | Pos terminal equipment |
JP2007300037A (en) * | 2006-05-08 | 2007-11-15 | Bit-Isle Inc | Rack and air conditioning control system |
JP2009294957A (en) * | 2008-06-05 | 2009-12-17 | Fujitsu Ltd | Storage device, information processor, and cooling method |
JP2011151131A (en) * | 2010-01-20 | 2011-08-04 | Fujitsu Ltd | Cooling controlling apparatus, electronic apparatus, and cooling controlling method |
US9377026B2 (en) | 2011-02-25 | 2016-06-28 | Nec Corporation | Electric device including an electric fan and a control unit for controlling the electric fan |
US9976563B2 (en) | 2011-02-25 | 2018-05-22 | Nec Corporation | Electric device including an electric fan which generates airflow at a time of low-temperature startup |
JP2012253066A (en) * | 2011-05-31 | 2012-12-20 | Mitsubishi Electric Corp | Air-cooling communication apparatus |
JP2014115012A (en) * | 2012-12-10 | 2014-06-26 | Nec Corp | Fan control device |
JP2013131236A (en) * | 2013-03-07 | 2013-07-04 | Nec Corp | Electrical equipment |
JP2014197423A (en) * | 2014-07-08 | 2014-10-16 | 日本電気株式会社 | Electrical apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH04291B2 (en) | 1992-01-07 |
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