JP2009027051A - Cooling device for electronic device - Google Patents

Cooling device for electronic device Download PDF

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JP2009027051A
JP2009027051A JP2007190290A JP2007190290A JP2009027051A JP 2009027051 A JP2009027051 A JP 2009027051A JP 2007190290 A JP2007190290 A JP 2007190290A JP 2007190290 A JP2007190290 A JP 2007190290A JP 2009027051 A JP2009027051 A JP 2009027051A
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cooling
temperature
electronic device
housing
modules
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Hiroaki Sasaki
博章 佐々木
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Yokogawa Electric Corp
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Yokogawa Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To achieve a cooling device for an electronic device, which prevents thermal destruction of the electronic device and other modules installed in the enclosure of the electronic device even when multiple modules having different heating values are installed. <P>SOLUTION: An improved cooling device for an electronic device having an enclosure into/from which multiple modules are installed/removed is provided. The cooling device includes: multiple variable rotation speed cooling fans that are provided above positions, in which respective modules are to be installed, and are two-dimensionally arranged on the top surface of the enclosure; temperature sensors that are provided for the respective modules; a rotation speed control section that increases the rotation speed(s) of the cooling fan(s) positioned above the temperature sensor(s) sensing higher temperature(s) on the basis of the temperatures sensed by the temperature sensors; and a power-off section that powers off the whole electronic device in the case where the temperature sensed by any temperature sensor exceeds a specified temperature even when the cooling fans rotate at the maximum speed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、筐体内に複数のモジュールが取り付け、取り外される組込み電子機器の冷却装置に関し、詳しくは、発熱量の異なるモジュールが複数装着された場合でも、機器本体の筐体に装着される他のモジュールや機器本体の熱破壊を防止する電子機器の冷却装置に関するものである。   The present invention relates to a cooling device for an embedded electronic device in which a plurality of modules are attached to and detached from a housing, and more specifically, even when a plurality of modules having different heat generation amounts are attached, The present invention relates to a cooling device for electronic equipment that prevents thermal destruction of modules and equipment bodies.

アドバンスTCAやVMEのような組込み電子機器では、機器本体の筐体に複数のスロットが設けられ、このスロット内にモジュールが実装される。そして、筐体側には、実装されたモジュールを冷却するための冷却装置が設けられる(例えば、特許文献1〜3参照)。   In an embedded electronic device such as Advanced TCA or VME, a plurality of slots are provided in a housing of the device body, and a module is mounted in the slot. And the cooling device for cooling the mounted module is provided in the housing | casing side (for example, refer patent documents 1-3).

図4は、従来の組込み電子機器の冷却装置を示した構成図である。図5(a)は、図4に示す装置の上面の断面図であり、図5(b)は、側面の断面図である。図4、図5において、筐体10は、組込みの電子機器の本体であり、機器前面に複数のスロットが設けられ、マザーボード11、冷却用ファン12を有する。マザーボード11は、スロットごとにコネクタ13が設けられる。冷却用ファン12は、機器背面の下部に複数個設けられる。   FIG. 4 is a configuration diagram illustrating a cooling device for a conventional embedded electronic device. 5A is a cross-sectional view of the top surface of the apparatus shown in FIG. 4, and FIG. 5B is a cross-sectional view of the side surface. 4 and 5, a housing 10 is a main body of a built-in electronic device, and a plurality of slots are provided on the front surface of the device, and includes a motherboard 11 and a cooling fan 12. The motherboard 11 is provided with a connector 13 for each slot. A plurality of cooling fans 12 are provided in the lower part of the back of the device.

モジュール20は、コネクタ21を有し、筐体10の所望のスロットに取り付け、取り外しが可能であり、マザーボード11からの信号に従って所定の動作を行なう。コネクタ21は、マザーボード11のコネクタ13と電気的に接続され、マザーボード11と信号の授受を行なう。また、モジュール20は、様々な電子部品が実装される基板(図示せず)を有する。   The module 20 has a connector 21, can be attached to and detached from a desired slot of the housing 10, and performs a predetermined operation in accordance with a signal from the motherboard 11. The connector 21 is electrically connected to the connector 13 of the mother board 11 and exchanges signals with the mother board 11. The module 20 has a substrate (not shown) on which various electronic components are mounted.

このような装置の動作を説明する。
モジュール20が筐体10の所望のスロットに実装される。そして、筐体10の電源がオンされて各モジュール20にも電力が供給され、筐体10からの指示に従って個々のモジュールが動作する。これにより、各モジュール20の基板に実装される発熱部品が発熱する。
The operation of such an apparatus will be described.
The module 20 is mounted in a desired slot of the housing 10. Then, the power supply of the housing 10 is turned on to supply power to each module 20, and each module operates in accordance with an instruction from the housing 10. Thereby, the heat-generating component mounted on the board of each module 20 generates heat.

一方、冷却用ファン12が、所定の回転数で回転し、筐体10の背面下部から空気を取り込み、筐体10の下部を通ってモジュール20の下まで空気を流す。そして、モジュール20の下面の空気孔(図示せず)から上面の空気孔(図示せず)を通り、筐体10の上面から空気が排出される。これにより、モジュール20が冷却される。   On the other hand, the cooling fan 12 rotates at a predetermined number of revolutions, takes air from the lower back of the housing 10, and flows the air through the lower portion of the housing 10 to the bottom of the module 20. Then, air is discharged from the upper surface of the housing 10 through an air hole (not shown) on the upper surface from an air hole (not shown) on the lower surface of the module 20. Thereby, the module 20 is cooled.

特開平5−95063号公報JP-A-5-95063 特開平6−42494号公報JP-A-6-42494 特開平9−250489号公報Japanese Patent Laid-Open No. 9-250489

しかしながら、発熱体の電子部品は、モジュール20の基板上の所望の位置に実装され、モジュール20内で温度勾配が生ずる。そして、モジュール20は、複数の種類が存在し、仕様や機能によって発熱量がモジュール20ごとに異なり、アドバンストTCAの規格に準拠したモジュール20では、最大200[W]の発熱量に達することもある。また、同じ種類のモジュール20であっても、マザーボード11からの指示によっても動作が異なり発熱量も異なる。さらに、モジュール20は、筐体10のスロットの所望の位置に装着することができ、ユーザの使用方法によって装着位置が異なる場合もある。   However, the electronic component of the heating element is mounted at a desired position on the substrate of the module 20, and a temperature gradient is generated in the module 20. There are a plurality of types of modules 20, and the amount of heat generated varies depending on the specifications and functions of each module 20. The module 20 compliant with the Advanced TCA standard may reach a maximum amount of heat of 200 [W]. . Even in the same type of module 20, the operation differs depending on the instruction from the mother board 11, and the amount of heat generated is also different. Furthermore, the module 20 can be mounted at a desired position in the slot of the housing 10, and the mounting position may differ depending on the usage method of the user.

そのため、筐体10の背面下部に設けられた冷却用ファン12によっては、個々のモジュール20を的確に冷却することが困難であり、最悪の場合、筐体10内の温度が上昇し、他のモジュール20や、機器本体の筐体10側の電子回路をも熱破壊されるという問題があった。   Therefore, depending on the cooling fan 12 provided at the lower back of the housing 10, it is difficult to accurately cool the individual modules 20. In the worst case, the temperature in the housing 10 rises, There was a problem that the module 20 and the electronic circuit on the housing 10 side of the device main body were also thermally destroyed.

そこで本発明の目的は、発熱量の異なるモジュールが複数装着された場合でも、機器本体の筐体に装着される他のモジュールや機器本体の熱破壊を防止する電子機器の冷却装置を実現することにある。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to realize a cooling device for an electronic device that prevents thermal destruction of other modules or the device body that are mounted on the housing of the device body even when a plurality of modules having different calorific values are mounted. It is in.

請求項1記載の発明は、
筐体内に複数のモジュールが取り付け、取り外される電子機器の冷却装置において、
前記モジュールが装着される位置の上側であり前記筐体の上面に2次元的に配置され、回転数可変の複数の冷却用ファンと、
前記モジュールそれぞれに設けられる温度センサと、
これらの温度センサの検出温度に基づいて、複数の温度センサのうち検出温度の高い温度センサの上側に位置する前記冷却用ファンの回転数を上げる回転数制御部と、
前記冷却用ファンの回転数が最大であっても前記温度センサの検出温度が所定の温度を超えた場合、電子機器全体の電源をオフする電源遮断部と
を設けたことを特徴とするものである。
請求項2記載の発明は、請求項1記載の発明において、
電源遮断部は、電子機器全体の電源をオフした場合であっても、前記冷却用ファンへの電力の供給を続けることを特徴とするものである。
請求項3記載の発明は、請求項1または2記載の発明において、
前記冷却用ファンは、前記筐体から外部に空気を排出するファンであることを特徴とするものである。
The invention described in claim 1
In a cooling device for an electronic device in which a plurality of modules are attached and removed from the housing,
A plurality of cooling fans that are two-dimensionally arranged on the upper surface of the housing above the position where the module is mounted;
A temperature sensor provided in each of the modules;
Based on the detected temperatures of these temperature sensors, a rotational speed control unit that increases the rotational speed of the cooling fan located above the temperature sensor having a higher detected temperature among the plurality of temperature sensors;
A power shut-off unit is provided for turning off the power of the entire electronic device when the detected temperature of the temperature sensor exceeds a predetermined temperature even when the number of rotations of the cooling fan is maximum. is there.
The invention according to claim 2 is the invention according to claim 1,
The power shut-off unit is characterized in that the power supply to the cooling fan is continued even when the power of the entire electronic device is turned off.
The invention according to claim 3 is the invention according to claim 1 or 2,
The cooling fan is a fan that discharges air from the housing to the outside.

本発明によれば、以下のような効果がある。
冷却用ファンが、筐体の上面に2次元的に配置され、モジュールそれぞれに複数の温度センサが設けられる。そして、回転数制御部が、検出温度の高い温度センサ近くの冷却用ファンの回転数を増加させるので、モジュールの冷却に最適な風量を流すことができる。また、電源遮断部が、冷却用ファンの回転数が最大となっても、温度センサの検出温度が所定の温度を超えた場合、電子機器全体の電源をオフする。これにより、発熱量の異なるモジュールが複数装着された場合でも、機器本体の筐体に装着される他のモジュールや機器本体等の熱破壊を防止することができる。
The present invention has the following effects.
A cooling fan is two-dimensionally arranged on the upper surface of the housing, and a plurality of temperature sensors are provided for each module. And since a rotation speed control part increases the rotation speed of the cooling fan near the temperature sensor with high detection temperature, it can flow the optimal air volume for cooling of a module. Moreover, even if the number of rotations of the cooling fan becomes maximum, the power shut-off unit turns off the power supply of the entire electronic device if the temperature sensor detects a temperature that exceeds a predetermined temperature. Thereby, even when a plurality of modules having different calorific values are mounted, it is possible to prevent thermal destruction of other modules mounted on the casing of the device main body or the device main body.

以下図面を用いて本発明の実施の形態を説明する。
図1は、本発明の一実施例を示した構成図である。ここで、図4、図5と同一のものには同一符号を付し説明を省略する。図1(a)は上面断面図であり、図1(b)は側面断面図である。図1において、筐体10には、空気排出用の冷却用ファン14、回転数制御部15、電源遮断部16が新たに設けられる。また、モジュール20には、温度センサ22が設けられる。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention. Here, the same components as those in FIG. 4 and FIG. FIG. 1A is a top sectional view, and FIG. 1B is a side sectional view. In FIG. 1, a housing 10 is newly provided with a cooling fan 14 for exhausting air, a rotation speed control unit 15, and a power cutoff unit 16. The module 20 is provided with a temperature sensor 22.

空気排出用の冷却用ファン14は、空気吸入用の冷却用ファン12とは別に設けられ、モジュール20が装着されるスロットの位置の上側であって、筐体10の上面に2次元的に配置される。また、冷却用ファン12、14は、回転数が可変である。ここで、図1においては、説明上、モジュール20が筐体10に挿入される方向をx軸とし、モジュール20が筐体10内で並ぶ方向をy軸とし、筐体10の高さ方向をz軸として説明する。そして、図1に示す装置では一例として、9個(x軸方向に3個、y軸方向に3個)の冷却用ファン14が設けられる例を示している。   The cooling fan 14 for discharging air is provided separately from the cooling fan 12 for sucking air, and is two-dimensionally arranged on the upper surface of the housing 10 above the slot where the module 20 is mounted. Is done. Further, the cooling fans 12 and 14 have variable rotation speeds. Here, in FIG. 1, for the sake of explanation, the direction in which the module 20 is inserted into the housing 10 is the x axis, the direction in which the modules 20 are arranged in the housing 10 is the y axis, and the height direction of the housing 10 is Explanation will be made on the z-axis. 1 shows an example in which nine cooling fans 14 (three in the x-axis direction and three in the y-axis direction) are provided.

回転数制御部15は、マザーボード11を介して温度センサ22と電気的に接続され、温度センサ22の検出した検出温度に基づいて、冷却用ファン12、14の回転数を制御する。   The rotational speed control unit 15 is electrically connected to the temperature sensor 22 via the mother board 11 and controls the rotational speeds of the cooling fans 12 and 14 based on the detected temperature detected by the temperature sensor 22.

電源遮断部16は、回転数制御部15による冷却用ファン12、14の回転数と、温度センサ22の検出温度とに基づいて、電子機器全体の電源をオフする。   The power cutoff unit 16 turns off the power supply of the entire electronic device based on the number of rotations of the cooling fans 12 and 14 by the rotation number control unit 15 and the temperature detected by the temperature sensor 22.

ここで、図2は、モジュール20の構成の一例を示した図である。また、図3は、温度センサ22、冷却用ファン14、回転数制御部15の関係を示したブロック図である。   Here, FIG. 2 is a diagram illustrating an example of the configuration of the module 20. FIG. 3 is a block diagram showing the relationship between the temperature sensor 22, the cooling fan 14, and the rotation speed control unit 15.

モジュール20は、基板23の両面をフレーム24が覆うように構成される。基板23は、後端にコネクタ21が取り付けられ、両面に様々な電子部品(発熱体)25が実装され、これら電子部品25用の放熱部品26も取り付けられる。   The module 20 is configured so that the frame 24 covers both surfaces of the substrate 23. The board 23 has a connector 21 attached to the rear end, various electronic components (heating elements) 25 are mounted on both sides, and a heat dissipation component 26 for the electronic components 25 is also attached.

フレーム24は、基板23の防塵、電気的なシールド等を兼ね、冷却用の空気を流す空気孔27がフレーム24の上面、下面に複数設けられる。   The frame 24 also serves as a dust-proof and electrical shield for the substrate 23, and a plurality of air holes 27 through which cooling air flows are provided on the upper and lower surfaces of the frame 24.

温度センサ22は、基板23やフレーム24の所望の位置に取り付けられ、例えば、発熱量の多い電子部品25、放熱部品26に直接取り付けられたり、電子部品25、放熱部品26の近傍の基板23上に取り付けられる。また、フレーム24の上面の空気孔27付近にも設けらる。   The temperature sensor 22 is attached to a desired position of the substrate 23 or the frame 24. For example, the temperature sensor 22 is directly attached to the electronic component 25 and the heat dissipation component 26 that generate a large amount of heat, or on the substrate 23 in the vicinity of the electronic component 25 and the heat dissipation component 26. Attached to. It is also provided near the air hole 27 on the upper surface of the frame 24.

このような装置の動作を説明する。
モジュール20が筐体10の所望のスロットに実装される。そして、筐体10の電源(図示せず)がオンされて各モジュール20にも電力が供給され、筐体10からの指示に従って個々のモジュール20が動作する。これにより、各モジュール20の基板23で発熱する。
The operation of such an apparatus will be described.
The module 20 is mounted in a desired slot of the housing 10. Then, a power source (not shown) of the housing 10 is turned on to supply power to each module 20, and each module 20 operates according to an instruction from the housing 10. As a result, heat is generated on the substrate 23 of each module 20.

一方、回転数制御部15が、電源のオンと共に冷却用ファン12、14を所定の回転数(初期値)で回転させ、筐体10の背面下部から空気を取り込み、筐体10の下部を通ってモジュール20の下まで空気を流す。そして、モジュール20のフレーム24下面の空気孔27から上面の空気孔27を通り、筐体10の上面のファン14から空気を筐体10の外部に排出し、各モジュール20を冷却させる。   On the other hand, the rotation speed control unit 15 rotates the cooling fans 12 and 14 at a predetermined rotation speed (initial value) when the power is turned on, takes in air from the lower back of the housing 10, and passes through the lower portion of the housing 10. Then, let air flow to the bottom of the module 20. Then, air passes through the air hole 27 on the lower surface of the frame 24 of the module 20 through the air hole 27 on the upper surface, and the air is discharged from the fan 14 on the upper surface of the housing 10 to the outside of the housing 10 to cool each module 20.

そして、回転数制御部15が、各モジュールの20の各温度センサ22による検出温度をマザーボード11を介して収集し、検出温度に基づいて2次元的に配列された個々のファン14の回転数を制御する。例えば、検出温度が上昇している温度センサ22は、冷却用の空気の風量が不足と判断し、この温度センサ22に近いファン14の回転数を増加させる。一方、検出温度が下降している場合、下降している温度センサ22に近いファン13の回転数を低下させる。   Then, the rotation speed control unit 15 collects the detected temperatures of the 20 temperature sensors 22 of each module via the mother board 11, and determines the rotation speeds of the individual fans 14 arranged two-dimensionally based on the detected temperatures. Control. For example, the temperature sensor 22 whose detected temperature is rising determines that the air volume of the cooling air is insufficient, and increases the rotational speed of the fan 14 close to the temperature sensor 22. On the other hand, when the detected temperature is decreasing, the rotational speed of the fan 13 close to the decreasing temperature sensor 22 is decreased.

図1(b)で具体的に説明する。図1(b)において、x軸方向に並んだ冷却用ファン14を、コネクタ21側から14(1)、14(2)、14(3)とする。そして、ファン14(3)の下に位置する温度センサの検出温度が最も高く(検出温度上昇中)、ファン14(2)の下に位置する温度センサの検出温度が最も低い場合、回転数制御部15が、ファン14の回転数を(ファン14(3)>14(1)>14(2))に制御する。そして、検出温度が設定した温度以下になるまで風量の調整を行なう。y軸方向に並んだファン14も同様に、ファン14の下に位置する温度センサ22の検出温度に基づいて回転数を制御し、風量を調整する。   This will be specifically described with reference to FIG. In FIG. 1B, the cooling fans 14 arranged in the x-axis direction are referred to as 14 (1), 14 (2), and 14 (3) from the connector 21 side. When the detected temperature of the temperature sensor located under the fan 14 (3) is the highest (while the detected temperature is rising) and the detected temperature of the temperature sensor located under the fan 14 (2) is the lowest, the rotational speed control is performed. The unit 15 controls the rotational speed of the fan 14 to (fan 14 (3)> 14 (1)> 14 (2)). Then, the air volume is adjusted until the detected temperature falls below the set temperature. Similarly, the fans 14 arranged in the y-axis direction control the rotational speed based on the temperature detected by the temperature sensor 22 located under the fan 14 to adjust the air volume.

そして、温度センサ22の検出温度がさらに上昇した場合、回転数制御部15が、ファン12、14それぞれの回転数を最大まで上げる。さらに、ファン12、14の回転数が最大であっても検出温度の上昇が止まらず所定の温度を超えた場合、電源遮断部16が、風量不足と判断して電子機器全体の電源をオフし、全モジュール20、マザーボード11への電力の供給を強制的に止める。この際、電源遮断部16が、ファン12、14のみは電力の供給を続け、筐体10、モジュール20の冷却を続けるとよい。   When the temperature detected by the temperature sensor 22 further increases, the rotation speed control unit 15 increases the rotation speeds of the fans 12 and 14 to the maximum. Further, if the detected temperature does not stop rising even if the rotation speed of the fans 12 and 14 is maximum and exceeds a predetermined temperature, the power shut-off unit 16 determines that the air volume is insufficient and turns off the power to the entire electronic device. The power supply to all the modules 20 and the mother board 11 is forcibly stopped. At this time, it is preferable that the power shut-off unit 16 keeps supplying power only to the fans 12 and 14 and cooling the casing 10 and the module 20.

このように、冷却用ファン14が、筐体10の上面に2次元的に配置され、モジュール20それぞれに複数の温度センサが設けられる。そして、回転数制御部15が、検出温度の高い温度センサ22近くの冷却用ファン14の回転数を増加させるので、モジュール20の冷却に最適な風量を流すことができる。   As described above, the cooling fan 14 is two-dimensionally arranged on the upper surface of the housing 10, and a plurality of temperature sensors are provided in each module 20. And since the rotation speed control part 15 increases the rotation speed of the cooling fan 14 near the temperature sensor 22 with a high detected temperature, it is possible to flow an air volume optimum for cooling the module 20.

また、電源遮断部16が、冷却用ファン12、14の回転数が最大となっても、温度センサ22の検出温度が所定の温度を超えた場合、電子機器全体の電源をオフする。これにより、発熱量の異なるモジュール20が複数装着された場合でも、機器本体の筐体10に装着される他のモジュール20や機器本体のマザーボード11等の熱破壊を防止することができる。   Moreover, even if the rotation speed of the cooling fans 12 and 14 becomes maximum, the power shut-off unit 16 turns off the power supply of the entire electronic device when the temperature detected by the temperature sensor 22 exceeds a predetermined temperature. Thereby, even when a plurality of modules 20 having different calorific values are mounted, it is possible to prevent thermal destruction of other modules 20 mounted on the casing 10 of the apparatus body, the motherboard 11 of the apparatus body, and the like.

なお、本発明はこれに限定されるものではなく、以下に示すようなものでもよい。
冷却用ファン14を筐体10の上面に9個(3個×3個)設ける構成を示したが、x軸方向、y軸方向に何個設けてもよい。
The present invention is not limited to this, and may be as shown below.
Although the configuration in which nine cooling fans 14 (3 × 3) are provided on the upper surface of the housing 10 is shown, any number of cooling fans 14 may be provided in the x-axis direction and the y-axis direction.

また、組込み電子機器の一種であるアドバンストTCAに適用する構成を示したが、筐体10内に複数のモジュールが装着される電子機器であれば、どのようなものでもよい。例えば、局内装置、多チャネル装置、VXI用の筐体、PCI用の筐体等である。   Moreover, although the structure applied to advanced TCA which is a kind of built-in electronic device was shown, what kind of thing may be sufficient if it is an electronic device by which a some module is mounted in the housing | casing 10. FIG. For example, an intra-station device, a multi-channel device, a VXI casing, a PCI casing, and the like.

本発明の一実施例を示した構成図である。It is the block diagram which showed one Example of this invention. 図1に示す装置のモジュール20の構成を示した図である。It is the figure which showed the structure of the module 20 of the apparatus shown in FIG. 図1に示す装置の温度センサ22、ファン12、回転数制御部15の関係を示したブロック図である。FIG. 2 is a block diagram showing a relationship among a temperature sensor 22, a fan 12, and a rotation speed control unit 15 of the apparatus shown in FIG. 従来の電子機器の冷却装置の構成を示した図である。It is the figure which showed the structure of the cooling device of the conventional electronic device. 図4に示す装置の断面図である。It is sectional drawing of the apparatus shown in FIG.

符号の説明Explanation of symbols

10 筐体
14 冷却用ファン
15 回転数制御部
16 電源遮断部
20 モジュール
22 温度センサ
DESCRIPTION OF SYMBOLS 10 Case 14 Cooling fan 15 Rotational speed control part 16 Power supply interruption part 20 Module 22 Temperature sensor

Claims (3)

筐体内に複数のモジュールが取り付け、取り外される電子機器の冷却装置において、
前記モジュールが装着される位置の上側であり前記筐体の上面に2次元的に配置され、回転数可変の複数の冷却用ファンと、
前記モジュールそれぞれに設けられる温度センサと、
これらの温度センサの検出温度に基づいて、複数の温度センサのうち検出温度の高い温度センサの上側に位置する前記冷却用ファンの回転数を上げる回転数制御部と、
前記冷却用ファンの回転数が最大であっても前記温度センサの検出温度が所定の温度を超えた場合、電子機器全体の電源をオフする電源遮断部と
を設けたことを特徴とする電子機器の冷却装置。
In a cooling device for an electronic device in which a plurality of modules are attached and removed from the housing,
A plurality of cooling fans that are two-dimensionally arranged on the upper surface of the housing above the position where the module is mounted;
A temperature sensor provided in each of the modules;
Based on the detected temperatures of these temperature sensors, a rotational speed control unit that increases the rotational speed of the cooling fan located above the temperature sensor having a higher detected temperature among the plurality of temperature sensors;
An electronic apparatus comprising: a power cutoff unit that turns off the power supply of the entire electronic apparatus when the detected temperature of the temperature sensor exceeds a predetermined temperature even when the number of rotations of the cooling fan is maximum Cooling system.
電源遮断部は、電子機器全体の電源をオフした場合であっても、前記冷却用ファンへの電力の供給を続けることを特徴とする電子機器の冷却装置。   The power supply cutoff unit continues to supply power to the cooling fan even when the power supply of the entire electronic device is turned off. 前記冷却用ファンは、前記筐体から外部に空気を排出するファンであることを特徴とする請求項1または2記載の電子機器の冷却装置。   3. The electronic apparatus cooling apparatus according to claim 1, wherein the cooling fan is a fan that discharges air from the housing to the outside.
JP2007190290A 2007-07-23 2007-07-23 Cooling device for electronic device Pending JP2009027051A (en)

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