JP2008235387A - Electrical and electronic equipment device with heat dissipation structure - Google Patents

Electrical and electronic equipment device with heat dissipation structure Download PDF

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JP2008235387A
JP2008235387A JP2007069808A JP2007069808A JP2008235387A JP 2008235387 A JP2008235387 A JP 2008235387A JP 2007069808 A JP2007069808 A JP 2007069808A JP 2007069808 A JP2007069808 A JP 2007069808A JP 2008235387 A JP2008235387 A JP 2008235387A
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heat dissipation
fins
cooling fan
heat sink
intake side
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Hikari Hirashima
光 平島
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Shindengen Electric Manufacturing Co Ltd
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Shindengen Electric Manufacturing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide electrical and electronic equipment device with a heat dissipation structure which can provide a sufficient heat dissipation effect by reducing a difference in temperature between the air intake side and the air exhaust side by air cooling with a cooling fan. <P>SOLUTION: The electrical and electronic equipment device has a forced air-cooling heat dissipation structure which includes a heat sink 20 having a cooling fan and a plurality of fins 21 for heat dissipation and which cools a plurality of objects to be cooled by sending air with the cooling fan toward the inside of the heat sink. In the heat dissipation structure, the plurality of objects to be cooled are arranged consecutively on a base surface 22 of the heat sink from the air intake side toward the air exhaust side of the cooling fan. The fins are so disposed that the surface area of each fin may become gradually or continuously smaller from the air exhaust side toward the air intake side of the cooling fan. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、冷却ファンと放熱用の複数のフィンを有するヒートシンクとを備え、前記冷却ファンが前記ヒートシンク内に向けて送風することにより連設する複数の冷却対象物を冷却する強制空冷式の放熱構造を備えた電気電子機器装置に関するものである。   The present invention includes a cooling fan and a heat sink having a plurality of fins for heat dissipation, and the forced cooling by which the cooling fan cools a plurality of cooling objects connected by blowing air toward the heat sink. The present invention relates to an electric and electronic equipment device having a structure.

従来から、図６に示すように、ヒートシンク２０を構成する同形状のフィン２１を複数有し、これら複数のフィン２１が冷却ファン１０の風向方向と平行になるように配置し、冷却ファン１０がヒートシンク２０に向けて送風することにより冷却対象物３０を冷却する強制空冷式の放熱構造は存在する（特許文献１参照）。
特開平０６−０３８５４６号公報 Conventionally, as shown in FIG. 6, a plurality of fins 21 of the same shape constituting the heat sink 20 are provided, and the plurality of fins 21 are arranged so as to be parallel to the airflow direction of the cooling fan 10. There is a forced air-cooling type heat dissipation structure that cools the cooling object 30 by blowing air toward the heat sink 20 (see Patent Document 1).
Japanese Patent Laid-Open No. 06-038354

しかし、単に複数の同形状のフィン２１を冷却ファン１０の風向方向と平行に配置した場合、空気温度が徐々に上昇するため、冷却ファン１０の吸気側から遠ざかる程放熱効果が低下するという課題を有する。   However, when the plurality of fins 21 having the same shape are simply arranged in parallel to the airflow direction of the cooling fan 10, the air temperature gradually rises, so that the heat dissipation effect decreases as the distance from the intake side of the cooling fan 10 increases. Have.

そこで、上記課題を解決すべく、図７に示すように隣り合う冷却対象物間に隙間を設け、この隙間ａ、ｂを吸気側から排気側へ向かうほど広げていく（ａ＜ｂ）手段が採用された。   Therefore, in order to solve the above-described problem, there is provided means for providing a gap between adjacent cooling objects as shown in FIG. 7, and widening the gaps a and b from the intake side toward the exhaust side (a <b). Adopted.

しかし、この手段は、ヒートシンクの全体の体積が増加するという課題を有しており、隣り合う冷却対象物間の隙間が十分確保できる場合には冷却効果が得られるが、冷却対象物間の隙間が各冷却対象物の大きさに比べて狭い場合には、前記手段と同様に、吸気側から遠ざかる程放熱効果が低下するという課題を有する。   However, this means has a problem that the entire volume of the heat sink increases, and a cooling effect can be obtained when a sufficient gap between adjacent cooling objects can be secured. However, when the cooling object is narrower than the size of each object to be cooled, there is a problem that the heat dissipating effect decreases as the distance from the intake side increases.

本発明は、上記問題に鑑みてなされたものであり、ヒートシンクの体積を増加させることなく、冷却ファンの吸気側と排気側との温度差を減少させ、十分な放熱効果が得られる放熱構造を備えた電気電子機器装置を提供する。   The present invention has been made in view of the above problems, and reduces the temperature difference between the intake side and the exhaust side of the cooling fan without increasing the volume of the heat sink, and provides a heat dissipation structure that can obtain a sufficient heat dissipation effect. Provided is an electrical and electronic equipment device.

上記課題を解決するために、本発明に係る放熱構造を備えた電気電子機器装置は、冷却ファンと放熱用の複数のフィンを有するヒートシンクとを備え、前記冷却ファンが前記ヒートシンク内に向けて送風することにより複数の冷却対象物を冷却する強制空冷式の放熱構造を備えた電気電子機器装置であって、前記複数の冷却対象物を前記ヒートシンクのベース面に、且つ、前記冷却ファンの吸気側から排気側への方向に連設し、前記冷却ファンの排気側から吸気側へ向けて前記フィンの表面積が段階的又は連続的に小さくなるように、前記フィンを配置してあることを特徴とする。   In order to solve the above-described problems, an electrical and electronic apparatus device having a heat dissipation structure according to the present invention includes a cooling fan and a heat sink having a plurality of fins for heat dissipation, and the cooling fan blows air into the heat sink. An electric and electronic equipment device having a forced air cooling type heat dissipation structure that cools a plurality of cooling objects by performing the plurality of cooling objects on a base surface of the heat sink, and on an intake side of the cooling fan The fins are arranged in a direction from the exhaust side to the exhaust side, and the fins are arranged so that the surface area of the fins decreases stepwise or continuously from the exhaust side to the intake side of the cooling fan. To do.

前記フィンは奥行きの長さが異なるものが複数種存在し、異なった奥行きのフィンを前記冷却ファンの排気側から吸気側へ向けて平行に配置してあることを特徴とする。
また、前記冷却ファンの排気側から吸気側へ向けて前記フィンの表面積が段階的又は連続的に小さくなるように、前記フィンの吸気側の一部を切欠してあることを特徴とする。 There are a plurality of types of fins having different depth lengths, and fins having different depths are arranged in parallel from the exhaust side to the intake side of the cooling fan.
Further, a part of the fin on the intake side is cut away so that the surface area of the fin decreases stepwise or continuously from the exhaust side to the intake side of the cooling fan.

本発明によれば、冷却ファンの排気側から吸気側へ向けてフィンの表面積が段階的に小さくなるように、フィンを配置してあるので、吸気側から排気側に向かうほどフィンの放熱面積が向上する。また流路断面積が減少することにより風速が増すため、ヒートシンクの放熱効果が向上する。これによりヒートシンク２０内の空気温度が徐々に上昇しても、排気側の放熱効果を向上させているため、吸気側の冷却対象物と排気側の冷却対象物との温度差が著しく減少し、ヒートシンクの体積を増加させることなく、排気側の冷却対象物も放熱効果を十分に得ることができる。   According to the present invention, since the fins are arranged so that the surface area of the fins decreases stepwise from the exhaust side to the intake side of the cooling fan, the heat dissipation area of the fins increases from the intake side toward the exhaust side. improves. Further, since the wind speed increases by reducing the cross-sectional area of the flow path, the heat dissipation effect of the heat sink is improved. Thereby, even if the air temperature in the heat sink 20 gradually increases, the heat dissipation effect on the exhaust side is improved, so the temperature difference between the cooling object on the intake side and the cooling object on the exhaust side is significantly reduced, Without increasing the volume of the heat sink, the cooling object on the exhaust side can also obtain a sufficient heat dissipation effect.

また、上記構成より、ファンの近傍の障害物である複数のフィン２１が減少するため、ファンの動作風量低下が最小限に抑えられ、従来構造と比較しヒートシンク内を流れる風量が増加しヒートシンク全体の温度上昇を抑えることができる。   In addition, since the plurality of fins 21 that are obstacles in the vicinity of the fan are reduced from the above configuration, a reduction in the fan's operating airflow is minimized, and the airflow flowing through the heatsink is increased as compared with the conventional structure, and the entire heatsink. Temperature rise can be suppressed.

発明を実施するための最良の形態に係る構成説明図を図１及び図２に示す。なお、図１は本実施例に係る電気電子機器装置における放熱構造の外観を示し、図２は本実施例に係る電気電子機器装置の放熱構造の内部断面図を示す。本実施例では、図１に示すように、冷却ファン１０と、図２に示すように放熱用の複数のフィン２１を有するヒートシンク２０とを備えてある。具体的には、電気電子機器装置を構成するヒートシンク２０内の一端に冷却ファン１０を備え、複数のフィン２１をヒートシンク２０内に備えてある。フィン２１の具体的構成については後述する。ヒートシンク２０のベース面２２には、冷却ファン１０の吸気側から排気側への方向に複数の冷却対象物３０を連設してある。なお、本実施例では冷却対象物３０として半導体素子を備えたモジュール（以下「モジュール３０」とする。）で構成してある。また、複数のモジュール３０を冷却ファン１０の排気から吸気への方向に等間隔で備えてある。このような構成により、冷却ファン１０がヒートシンク２０に向けて送風することにより連設する複数のモジュール３０を冷却するように構成してある。   An explanatory diagram of a configuration according to the best mode for carrying out the invention is shown in FIGS. FIG. 1 shows the appearance of the heat dissipation structure in the electrical / electronic equipment apparatus according to the present embodiment, and FIG. 2 shows an internal cross-sectional view of the heat dissipation structure of the electrical / electronic equipment apparatus according to the present embodiment. In this embodiment, as shown in FIG. 1, a cooling fan 10 and a heat sink 20 having a plurality of fins 21 for heat dissipation as shown in FIG. 2 are provided. Specifically, the cooling fan 10 is provided at one end of the heat sink 20 constituting the electric / electronic device, and the plurality of fins 21 are provided in the heat sink 20. A specific configuration of the fin 21 will be described later. A plurality of cooling objects 30 are connected to the base surface 22 of the heat sink 20 in the direction from the intake side to the exhaust side of the cooling fan 10. In this embodiment, the cooling object 30 is constituted by a module (hereinafter referred to as “module 30”) provided with a semiconductor element. A plurality of modules 30 are provided at equal intervals in the direction from the exhaust to the intake of the cooling fan 10. With such a configuration, the cooling fan 10 is configured to cool the plurality of modules 30 connected in series by blowing air toward the heat sink 20.

続いて、フィン２１の構造について説明する。本実施例に係るフィン２１は、冷却ファン１０の排気側から吸気側へ向けてフィン２１の表面積が段階的に小さくなるように、奥行きの長さが異なるフィン２１が複数種、本実施例においては２種類存在する。奥行きが長いフィン２１ａは冷却ファンの排気側から吸気側まで奥行きを有する。一方、奥行きが短いフィン２１ｂは奥行きが長いフィン２１ａと同様に冷却ファン１０の排気側から存在し、奥行きの長さは奥行きの長いフィン２１ａに比べて約半分の長さにしてある。また、これら奥行きの長いフィン２１ａと奥行きの短いフィン２１ｂを交互に且つ平行に配置してある。これにより、冷却ファン１０の排気側におけるフィン２１の単位長さあたりの表面積は、冷却ファン１０の吸気側におけるフィン２１の単位長さあたりの表面積の２倍となる。   Next, the structure of the fin 21 will be described. The fin 21 according to the present embodiment includes a plurality of types of fins 21 having different depth lengths so that the surface area of the fin 21 decreases stepwise from the exhaust side to the intake side of the cooling fan 10. There are two types. The fin 21a having a long depth has a depth from the exhaust side to the intake side of the cooling fan. On the other hand, the fin 21b with a short depth exists from the exhaust side of the cooling fan 10 like the fin 21a with a long depth, and the depth is about half that of the fin 21a with a long depth. Further, these long fins 21a and short fins 21b are arranged alternately and in parallel. Thereby, the surface area per unit length of the fin 21 on the exhaust side of the cooling fan 10 is twice the surface area per unit length of the fin 21 on the intake side of the cooling fan 10.

以上のように構成してある電気電子機器装置を構成するヒートシンク２０のベース面２２に配置したモジュール３０を以下のように冷却する。なお、図３に動作説明を示す。先ず、冷却ファン１０がヒートシンク２０内に向けて送風することにより連設する複数のモジュール３０を冷却する。この際、本実施例の電気電子機器装置はフィン２１の厚みと排気側のフィン２１間の隙間寸法が同一と仮定すると吸気側のフィン２１間を流れる空気の流路断面積が排気側の１．５倍となることから、空気の風速は排気側の風速の２／３になり放熱量を１／√１．５に抑えられる。またフィン２１の表面積が排気側の表面積の１／２と少ないため、ヒートシンク２０の放熱量を１／２に抑えられる。これにより吸気側のヒートシンク２０の温度上昇は高くなるが、吸気側のヒートシンク２０内の空気温度上昇を抑えられ、排気側のフィン２１へ与える吸気側の温度上昇の影響を抑えることができる。   The module 30 arranged on the base surface 22 of the heat sink 20 constituting the electric / electronic equipment apparatus configured as described above is cooled as follows. FIG. 3 shows the operation description. First, the cooling fan 10 cools the plurality of modules 30 connected in series by blowing air toward the heat sink 20. At this time, in the electrical and electronic apparatus according to the present embodiment, assuming that the thickness of the fins 21 and the gap size between the fins 21 on the exhaust side are the same, the cross-sectional area of the air flow between the fins 21 on the intake side is 1 on the exhaust side. Therefore, the wind speed of the air is 2/3 of the wind speed on the exhaust side, and the heat radiation amount can be suppressed to 1 / √1.5. Further, since the surface area of the fin 21 is as small as 1/2 of the surface area on the exhaust side, the heat dissipation amount of the heat sink 20 can be suppressed to 1/2. As a result, the temperature rise of the heat sink 20 on the intake side increases, but the rise in the air temperature in the heat sink 20 on the intake side can be suppressed, and the influence of the temperature rise on the intake side applied to the fins 21 on the exhaust side can be suppressed.

一方、排気側では、フィン２１間の流路断面積が吸気側の２／３のため、空気の風速は吸気側の風速の１．５倍になり放熱量を√１．５倍することができる。また、放熱するフィン２１の数が吸気側に比べて２倍であるため、フィン２１の表面積が吸気側の２倍となり、放熱量も吸気側に比べて２倍となる。これにより、排気側の温度上昇を抑えることができ、吸気側、排気側のヒートシンク２０の温度差が従来のものと比較して減少させることができる。このことから、従来のような隣り合うモジュール３０間に隙間を設け、この隙間を吸気側から排気側へ向かうほど広げる必要もなく、ヒートシンク２０の体積を増加させることなく、吸気側、排気側共に、モジュール３０を冷却することができる。   On the other hand, on the exhaust side, the cross-sectional area of the flow path between the fins 21 is 2/3 on the intake side, so that the air wind speed is 1.5 times the air speed on the intake side, and the heat dissipation amount can be increased by √1.5. it can. In addition, since the number of fins 21 that dissipate heat is twice that of the intake side, the surface area of the fins 21 is double that of the intake side, and the amount of heat dissipation is also double that of the intake side. Thereby, the temperature rise on the exhaust side can be suppressed, and the temperature difference between the heat sink 20 on the intake side and the exhaust side can be reduced as compared with the conventional one. Therefore, it is not necessary to provide a gap between adjacent modules 30 as in the prior art, and to widen the gap from the intake side toward the exhaust side, and without increasing the volume of the heat sink 20, both on the intake side and the exhaust side. The module 30 can be cooled.

また吸気側のフィン２１による空気の障害を少なくできるため、冷却ファン１０の動作風量の低下が最小限に抑えられ、従来構造と比較しヒートシンク２０内を流れる風量が増加しヒートシンク２０全体の温度上昇を抑えることができる。   Further, since the air obstruction caused by the fins 21 on the intake side can be reduced, the reduction in the operating air volume of the cooling fan 10 can be minimized, the air volume flowing through the heat sink 20 is increased as compared with the conventional structure, and the temperature of the entire heat sink 20 is increased. Can be suppressed.

続いて、別の実施例の内部構造を図４に示す。この実施例におけるフィン２１の構成は、排気側からヒートシンク２０の中央部分までにおいては、フィン２１をヒートシンク２０と平行に全面的に配置し、ヒートシンク２０の中央部分から吸気側までにおいては、フィン２１を斜めに切欠させてある。このような構成より、吸気側からヒートシンク２０の中央部分までは連続的に表面積が増加し、ヒートシンク２０の中央部分を超えると表面積が一定になるように構成してある。また、ヒートシンク２０の中央部より吸気側と中央部より排気側とでは、吸気側の表面積が排気側の表面積の２倍となる。   Subsequently, an internal structure of another embodiment is shown in FIG. In the configuration of the fins 21 in this embodiment, the fins 21 are disposed entirely in parallel with the heat sink 20 from the exhaust side to the central part of the heat sink 20, and the fins 21 are disposed from the central part of the heat sink 20 to the intake side. Is cut diagonally. With such a configuration, the surface area continuously increases from the intake side to the central portion of the heat sink 20, and the surface area is constant beyond the central portion of the heat sink 20. Further, the surface area on the intake side is twice as large as the surface area on the exhaust side, from the central portion of the heat sink 20 to the intake side and from the central portion to the exhaust side.

以上のように構成してある電気電子機器装置を構成するヒートシンク２０のベース面２２に配置したモジュール３０を以下のように冷却する。先ず、冷却ファン１０がヒートシンク２０内に向けて送風することにより連設する複数のモジュール３０を冷却する。この際、本実施例の電気電子機器装置は吸気側からヒートシンク２１中央部分に空気が流れるにつれてフィン２１間を流れる空気の風速は、流路断面積が連続的に減少するに従い、連続的に上昇する。このとき、中央部より吸気側の流路断面積の平均値は排気側の２倍であるため、風速の平均値は１／２となり放熱量を１／√２に抑えられる。またフィン２１の中央部より吸気側の表面積は排気側の表面積の１／２と少ないため、ヒートシンク２０の放熱量を１／２に抑えられる。これにより吸気側のヒートシンク２０の温度上昇は高くなるが、吸気側のヒートシンク２０内の空気温度上昇を抑えられ、排気側のフィン２１へ与える吸気側の温度上昇の影響を抑えることができる。   The module 30 arranged on the base surface 22 of the heat sink 20 constituting the electric / electronic equipment apparatus configured as described above is cooled as follows. First, the cooling fan 10 cools the plurality of modules 30 connected in series by blowing air toward the heat sink 20. At this time, in the electric / electronic device according to the present embodiment, as the air flows from the intake side to the central portion of the heat sink 21, the air velocity of the air flowing between the fins 21 continuously increases as the flow path cross-sectional area continuously decreases. To do. At this time, since the average value of the channel cross-sectional area on the intake side from the central part is twice that on the exhaust side, the average value of the wind speed becomes ½, and the heat radiation amount can be suppressed to 1 / √2. Further, since the surface area on the intake side from the central portion of the fin 21 is as small as 1/2 of the surface area on the exhaust side, the heat radiation amount of the heat sink 20 can be suppressed to 1/2. As a result, the temperature rise of the heat sink 20 on the intake side increases, but the rise in the air temperature in the heat sink 20 on the intake side can be suppressed, and the influence of the temperature rise on the intake side applied to the fins 21 on the exhaust side can be suppressed.

一方、ヒートシンク２０の中央部分を過ぎると、フィン２１間の流路断面積がヒートシンク２０の中央部より吸気側の平均値の１／２になるため、風速は吸気側の２倍になり放熱量を√２倍にすることができる。また、放熱するフィン２１の表面積が中央部より吸気側の表面積の平均値の２倍になることにより、放熱量も吸気側に比べて２倍になる。これにより、排気側の温度上昇を抑えることができるため、吸気側、排気側のヒートシンク２０の温度差が従来のものと比較して減少させることができる。このことから、吸気側に設けたモジュール３０と排気側に設けたモジュール３０との温度差が従来のものに比べて少なくなるため、従来のような隣り合うモジュール３０間に隙間を設け、この隙間を吸気側から排気側へ向かうほど広げる必要もなく、ヒートシンク２０の体積を増加させることなく、吸気側、排気側共に、モジュール３０を冷却することができる。   On the other hand, after passing through the central portion of the heat sink 20, the cross-sectional area of the flow path between the fins 21 is ½ of the average value on the intake side from the central portion of the heat sink 20, so the wind speed is twice that on the intake side and the heat dissipation amount. Can be multiplied by √2. Further, since the surface area of the fin 21 that dissipates heat is twice the average value of the surface area on the intake side from the central portion, the heat dissipation amount is also doubled compared to the intake side. Thereby, since the temperature rise on the exhaust side can be suppressed, the temperature difference between the heat sink 20 on the intake side and the exhaust side can be reduced as compared with the conventional one. Therefore, since the temperature difference between the module 30 provided on the intake side and the module 30 provided on the exhaust side is smaller than that of the conventional one, a gap is provided between the adjacent modules 30 as in the prior art. The module 30 can be cooled on both the intake side and the exhaust side without increasing the volume of the heat sink 20 from the intake side to the exhaust side.

また吸気側のフィン２１による空気の障害を少なくできるため、冷却ファン１０の動作風量の低下が最小限に抑えられ、従来構造と比較しヒートシンク２０内を流れる風量が増加しヒートシンク２０全体の温度上昇を抑えることができる。   Further, since the air obstruction caused by the fins 21 on the intake side can be reduced, the reduction in the operating air volume of the cooling fan 10 can be minimized, the air volume flowing through the heat sink 20 is increased as compared with the conventional structure, and the temperature of the entire heat sink 20 is increased. Can be suppressed.

続いて、さらに別の実施例の内部構造を図５に示す。この実施例におけるフィン２１の構成は、冷却ファン１０の排気側からヒートシンク２０の中央部分までにおいてのみ、複数のフィン２１を配置してある。これにより、冷却ファン１０の吸気側からヒートシンク２０の中央部分まではヒートシンク２０の表面のみが冷却面となる。これに対して、冷却ファン１０の排気側からヒートシンク２０の中央部分までは複数のフィン２１が冷却面となる。なお、冷却作用については、図２図示実施例とほぼ同様であるため、説明を省略する。   Subsequently, the internal structure of still another embodiment is shown in FIG. In the configuration of the fins 21 in this embodiment, a plurality of fins 21 are arranged only from the exhaust side of the cooling fan 10 to the central portion of the heat sink 20. As a result, only the surface of the heat sink 20 becomes the cooling surface from the intake side of the cooling fan 10 to the central portion of the heat sink 20. On the other hand, a plurality of fins 21 serve as cooling surfaces from the exhaust side of the cooling fan 10 to the central portion of the heat sink 20. The cooling action is substantially the same as in the embodiment shown in FIG.

なお、本発明は、冷却ファン１０の排気側から吸気側へ向けてフィン２１の表面積が段階的又は連続的に小さくなるように、フィン２１を配置してあれば、フィン２０の具体的構成は問わない。また、図１はベース面２２を両側に配置するヒートシンク形状となっているが、ベース面２２が片側のみのヒートシンク形状でもよい。   In the present invention, if the fins 21 are arranged so that the surface area of the fins 21 decreases stepwise or continuously from the exhaust side to the intake side of the cooling fan 10, the specific configuration of the fins 20 is as follows. It doesn't matter. Further, FIG. 1 shows a heat sink shape in which the base surface 22 is arranged on both sides, but the base surface 22 may have a heat sink shape with only one side.

本発明によれば、冷却ファンの排気側から吸気側へ向けてフィンの表面積が段階的に小さくなるように、フィンを配置してあるので、吸気側から排気側に向かうほどフィンの放熱面積が向上し且つ風速が増すため、ヒートシンクの放熱効果が向上する。これにより吸気側の冷却対象物と排気側の冷却対象物との温度差が著しく減少し、排気側の冷却対象物も放熱効果を十分に得ることができ、産業上利用可能である。   According to the present invention, since the fins are arranged so that the surface area of the fins decreases stepwise from the exhaust side to the intake side of the cooling fan, the heat radiation area of the fins increases from the intake side toward the exhaust side. Since the wind speed is improved and the heat dissipation effect of the heat sink is improved. Thereby, the temperature difference between the cooling object on the intake side and the cooling object on the exhaust side is remarkably reduced, and the cooling object on the exhaust side can sufficiently obtain a heat dissipation effect and can be used industrially.

また、上記構成より、ファンの近傍の障害物である複数のフィン２１が減少するため、ファンの動作風量低下が抑えられ、風速を向上させることができる。このことによりフィン全体の放熱効果が向上し、吸気側、排気側共に冷却対象物の温度上昇を抑えることができ、産業上利用可能である。   Moreover, since the several fin 21 which is an obstruction in the vicinity of a fan reduces from the said structure, the fall of the operation | movement air volume of a fan can be suppressed and a wind speed can be improved. As a result, the heat dissipation effect of the entire fin is improved, and the temperature rise of the object to be cooled can be suppressed on both the intake side and the exhaust side, which is industrially applicable.

本発明に係る電気電子機器装置における発明を実施するための最良の形態の放熱構造の外観図である。BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the heat dissipation structure of the best form for implementing invention in the electric and electronic equipment apparatus which concerns on this invention. 図１図示実施例における放熱構造の内部断面図である。1 is an internal cross-sectional view of a heat dissipation structure in the embodiment shown in FIG. 図１図示実施例における動作説明図である。It is operation | movement explanatory drawing in the Example shown in FIG. 図２図示実施例とは別の実施例における放熱構造の内部断面図である。2 is an internal cross-sectional view of a heat dissipation structure in an embodiment different from the embodiment shown in FIG. 前記実施例とは別の実施例における放熱構造の内部断面図である。It is an internal sectional view of a heat dissipation structure in an embodiment different from the above embodiment. 従来の電気電子機器装置における放熱構造の内部断面図である。It is an internal sectional view of the heat dissipation structure in the conventional electric and electronic equipment device. 従来の電気電子機器装置における放熱構造の外観図である。It is an external view of the heat dissipation structure in the conventional electric and electronic equipment apparatus.

符号の説明Explanation of symbols

１０ 冷却ファン
２０ ヒートシンク
２１，２１ａ，２１ｂ フィン
２２ ベース面
３０ 冷却対象物（モジュール） DESCRIPTION OF SYMBOLS 10 Cooling fan 20 Heat sink 21,21a, 21b Fin 22 Base surface 30 Cooling object (module)

Claims (3)

冷却ファンと放熱用の複数のフィンを有するヒートシンクとを備え、前記冷却ファンが前記ヒートシンク内に向けて送風することにより複数の冷却対象物を冷却する強制空冷式の放熱構造を備えた電気電子機器装置であって、
前記複数の冷却対象物を前記ヒートシンクのベース面に、且つ、前記冷却ファンの吸気側から排気側への方向に連設し、前記冷却ファンの排気側から吸気側へ向けて前記フィンの表面積が段階的又は連続的に小さくなるように、前記フィンを配置してあることを特徴とする放熱構造を備えた電気電子機器装置。 An electric and electronic device comprising a cooling fan and a heat sink having a plurality of fins for heat dissipation, and a forced air-cooling heat dissipation structure that cools a plurality of objects to be cooled when the cooling fan blows air into the heat sink A device,
The plurality of objects to be cooled are connected to the base surface of the heat sink and in the direction from the intake side to the exhaust side of the cooling fan, and the fin has a surface area from the exhaust side to the intake side. An electrical and electronic equipment device provided with a heat dissipation structure, wherein the fins are arranged so as to be reduced stepwise or continuously. 前記フィンは奥行きの長さが異なるものが複数種存在し、異なった奥行きのフィンを前記冷却ファンの排気側から吸気側へ向けて平行に配置してあることを特徴とする請求項１記載の放熱構造を備えた電気電子機器装置。 2. The fin according to claim 1, wherein a plurality of types of fins having different depth lengths exist, and fins having different depths are arranged in parallel from the exhaust side to the intake side of the cooling fan. Electrical and electronic equipment with a heat dissipation structure. 前記冷却ファンの排気側から吸気側へ向けて前記フィンの表面積が段階的又は連続的に小さくなるように、前記フィンの吸気側の一部を切欠してあることを特徴とする請求項１又は２記載の放熱構造を備えた電気電子機器装置。 2. A part of the intake side of the fin is cut away so that the surface area of the fin decreases stepwise or continuously from the exhaust side to the intake side of the cooling fan. An electrical and electronic equipment device comprising the heat dissipation structure according to 2.
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