JP2006165312A

JP2006165312A - Cooling device

Info

Publication number: JP2006165312A
Application number: JP2004355360A
Authority: JP
Inventors: Michiya Kino; 通弥嬉野
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2004-12-08
Filing date: 2004-12-08
Publication date: 2006-06-22

Abstract

<P>PROBLEM TO BE SOLVED: To very uniformly cool a cooling region to be cooled, even when a part of a plurality of cooling fans stops, by reducing deterioration of the cooling ability of a cooling fan caused by a backflow preventing shutter. <P>SOLUTION: When all of the adjacent cooling fans operate, backflow preventing shutters 12ab, 12bc are parallel to cooling winds Wa, Wb, Wc generated in the adjacent cooling fan. When any one of the adjacent cooling fans stops, the shutters will pivot by means of the force of cooling wind generated in a cooling fan in operation and tilt to the stopped cooling fan side, and operate to form a cooling wind path whose area is gradually enlarged, starting from the upstream of cooling wind generated in the cooling fan in operation to the downstream thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、例えば電子機器等の被冷却対象を冷却する冷却装置に関するものである。 The present invention relates to a cooling device that cools an object to be cooled such as an electronic device.

従来、冷却風路内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファンを有する冷却装置は、例えば特開２００３−１３０４３９号公報（特許文献１）に見られるように、各冷却ファンの出力側に個別に配置された各逆流防止シャッターが、作動中の対応冷却ファンの風力によって出力風の方向と平行な状態に開き、冷却ファンの停止時には出力方向と略垂直な状態に閉まるように構成されている。 Conventionally, a cooling device having a plurality of cooling fans that are arranged adjacent to each other in a cooling air passage and generate substantially parallel cooling air in the same direction is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-130439 (Patent Document 1). As can be seen, each backflow prevention shutter arranged individually on the output side of each cooling fan opens in parallel with the direction of the output wind by the wind of the corresponding cooling fan in operation, and the output direction when the cooling fan is stopped It is comprised so that it may close in a substantially perpendicular state.

特開２００３−１３０４３９号公報（図１〜８及びその説明）JP-A-2003-130439 (FIGS. 1-8 and description thereof)

従来の冷却装置は前述のように構成されているため、冷却ファンが作動している時にはその出力である冷却風の風力の一部を常に逆流防止シャッターを開けるために振り向ける必要があり、冷却ファン単独（つまり、逆流防止シャッターを設けてない状態）よりも出力冷却風の風量が低下し、電子機器等の被冷却対象を冷却する能力が落ちるという問題点があった。 Since the conventional cooling device is configured as described above, when the cooling fan is operating, it is necessary to always direct a part of the wind of the cooling air that is the output to open the backflow prevention shutter. The amount of the output cooling air is lower than that of a fan alone (that is, a state where no backflow prevention shutter is provided), and there is a problem in that the ability to cool an object to be cooled such as an electronic device is reduced.

また、複数台の冷却ファンのうちの一部の冷却ファンが故障等により停止した場合には、停止した冷却ファンの逆流防止シャッターが出力冷却風の方向とほぼ垂直な状態に閉まるために、動作中の冷却ファンの出力冷却風が前記停止した冷却ファンの出力側に流れにくく、被冷却対象を均一に冷却できなくなるという問題点があった。この被冷却対象を均一に冷却できなくなるという問題点を、３個の冷却ファンが並列に配設されている場合について図１０により説明する。 Also, when some of the cooling fans stop due to a failure, the backflow prevention shutter of the stopped cooling fans closes in a state almost perpendicular to the direction of the output cooling air. There is a problem that the output cooling air of the cooling fan inside does not easily flow to the output side of the stopped cooling fan, and the object to be cooled cannot be uniformly cooled. The problem that the object to be cooled cannot be uniformly cooled will be described with reference to FIG. 10 when three cooling fans are arranged in parallel.

即ち、図１０は、３個の冷却ファン１１ａ，１１ｂ，１１ｃから冷却風の下流側に所定距離隔てた被冷却対象の冷却領域における冷却風量を、中央の冷却ファン１１ｂが停止しその両側の冷却ファン１１ａ，１１ｃが動作中の場合について例示したものである。この図１０に示してあるように、被冷却対象の一点鎖線で示す冷却領域ＣＡにおいて、動作中の冷却ファン１１ａ，１１ｃ（逆流防止シャッター１２ａ，１２ａ，１２ｃ，１２ｃが開いている）の直下流部分に比べ、停止中の冷却ファン１１ｂ（逆流防止シャッター１２ｂ，１２ｂが閉じている）の直下流部分は、冷却風量Ｐｗが可成り少なくなるので、冷却領域が均一に冷却されなくなる。なお、矢印は、冷却領域ＣＡにおける等間隔の多数の点の各々での冷却風の方向と冷却風量とをベクトル的に例示したもので、冷却風量が大きいほど矢印の長さを長くしてあり、これら多数の矢印の各先端を結ぶ二点鎖線が前記冷却風量Ｐｗである。 That is, FIG. 10 shows the amount of cooling air in the cooling area to be cooled, which is separated from the three cooling fans 11a, 11b, and 11c by a predetermined distance downstream of the cooling air. The case where the fans 11a and 11c are operating is illustrated. As shown in FIG. 10, in the cooling area CA indicated by the one-dot chain line to be cooled, immediately downstream of the cooling fans 11a and 11c in operation (the backflow prevention shutters 12a, 12a, 12c and 12c are open). Compared to the portion, the cooling air amount Pw is considerably reduced in the portion immediately downstream of the stopped cooling fan 11b (the backflow prevention shutters 12b and 12b are closed), so that the cooling region is not uniformly cooled. The arrow is a vector illustration of the direction of cooling air and the amount of cooling air at each of a number of equally spaced points in the cooling area CA. The larger the amount of cooling air, the longer the length of the arrow. The two-dot chain line connecting the tips of these multiple arrows is the cooling air flow rate Pw.

従って、冷却風路内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファンを有する冷却装置においては、逆流防止シャッターを設けた場合、逆流防止シャッターに起因する前記冷却能力の低下を少なくするようにすることが好ましい。また、複数台の冷却ファンのうちの一部の冷却ファンが故障等により停止した場合においても、被冷却対象の冷却領域が極力均一に冷却されるようにすることが好ましい。 Therefore, in a cooling device having a plurality of cooling fans that are arranged adjacent to each other in the cooling air passage and generate substantially parallel cooling air in the same direction, when the backflow prevention shutter is provided, it is caused by the backflow prevention shutter. It is preferable to reduce the decrease in the cooling capacity. Further, even when some of the plurality of cooling fans are stopped due to a failure or the like, it is preferable that the cooling area to be cooled is cooled as uniformly as possible.

この発明は、前述のような実情に鑑みてなされたもので、冷却風路内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファンを有する冷却装置において、逆流防止シャッターに起因する冷却ファンの冷却能力の低下を少なくし、しかも複数台の冷却ファンのうちの一部の冷却ファンが停止した場合においても被冷却対象の冷却領域が極力均一に冷却されるようにすることを目的とするものである。 The present invention has been made in view of the above circumstances, and is provided in a cooling device having a plurality of cooling fans that are arranged adjacent to each other in a cooling air passage and generate substantially parallel cooling air in the same direction. The cooling area of the cooling fan caused by the backflow prevention shutter is reduced and the cooling area to be cooled is cooled as evenly as possible even when some of the cooling fans are stopped. The purpose is to make it.

この発明に係る冷却装置は、被冷却対象への冷却風路内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファン、および前記冷却風路内における前記隣接する冷却ファンの間に当該冷却ファン側が枢着された逆流防止シャッタ−を備え、前記逆流防止シャッタ−は、前記隣接する冷却ファンが何れも動作している場合は当該隣接する冷却ファンに生起される冷却風と平行をなし、当該隣接する冷却ファンの何れか一の停止時は動作中の冷却ファンに生起される冷却風の力によって枢動し前記停止冷却ファン側に傾斜して前記動作中の冷却ファンに生起される冷却風の上流側から下流側へ面積が漸次拡大する冷却風路を形成する動作をするものである。 The cooling device according to the present invention includes a plurality of cooling fans that are arranged adjacent to each other in the cooling air passage to the object to be cooled and generate substantially parallel cooling air in the same direction, and the cooling air passage in the cooling air passage. A backflow prevention shutter having a cooling fan side pivotally mounted between adjacent cooling fans is provided, and the backflow prevention shutter is generated in the adjacent cooling fan when all the adjacent cooling fans are operating. Parallel to the cooling air to be operated, when any one of the adjacent cooling fans is stopped, it is pivoted by the force of the cooling air generated in the operating cooling fan and tilted toward the stopped cooling fan to operate An operation is performed to form a cooling air passage whose area gradually increases from the upstream side to the downstream side of the cooling air generated in the cooling fan inside.

この発明は、被冷却対象への冷却風路内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファン、および前記冷却風路内における前記隣接する冷却ファンの間に当該冷却ファン側が枢着された逆流防止シャッタ−を備え、前記逆流防止シャッタ−は、前記隣接する冷却ファンが何れも動作している場合は当該隣接する冷却ファンに生起される冷却風と平行をなし、当該隣接する冷却ファンの何れか一の停止時は動作中の冷却ファンに生起される冷却風の力によって枢動し前記停止冷却ファン側に傾斜して前記動作中の冷却ファンに生起される冷却風の上流側から下流側へ面積が漸次拡大する冷却風路を形成する動作をするようにしたので、冷却風路内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファンを有する冷却装置において、逆流防止シャッターに起因する冷却ファンの冷却能力の低下を少なくし、しかも複数台の冷却ファンのうちの一部の冷却ファンが停止した場合においても被冷却対象の冷却領域が極力均一に冷却されるようにすることができる効果がある。 The present invention relates to a plurality of cooling fans that are arranged adjacent to each other in a cooling air passage to be cooled and generate substantially parallel cooling air in the same direction, and the adjacent cooling fans in the cooling air passage. A reverse flow prevention shutter pivotally mounted on the side of the cooling fan, and the reverse flow prevention shutter includes cooling air generated in the adjacent cooling fan when any of the adjacent cooling fans is operating. The cooling fan that is in operation is tilted toward the stop cooling fan and is pivoted by the force of the cooling air generated in the operating cooling fan when any one of the adjacent cooling fans is stopped. The cooling air flow generated in the cooling air passage is formed so that the area gradually increases from the upstream side to the downstream side. Multiple cooling air In a cooling device having multiple cooling fans, the cooling fan's cooling capacity decreases due to the backflow prevention shutter, and even if some of the multiple cooling fans are stopped, the cooling target There is an effect that the cooling region can be cooled as uniformly as possible.

実施の形態１．
以下この発明の実施の形態１を図１〜図４により説明する。図１は夫々ほぼ平行な同方向の冷却風を生起する３台（複数台）の冷却ファンが電子機器等の被冷却対象に取り付けられた状態の冷却装置の事例を正面側から見た斜視図、図２は図１に示される３台の冷却ファンが全て動作している場合の逆流防止シャッタ−の状態を示す正面図、図３は図１に示される３台の冷却ファンのうち中央の１台が停止し両側の２台が動作している場合の逆流防止シャッタ−の状態を示す正面図、図４は図２に示される冷却装置を鉛直方向下側から見た平面図である。なお、各図中、同一符合は同一部分を示す。 Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of an example of a cooling device viewed from the front side in a state in which three (a plurality of) cooling fans that generate substantially parallel cooling air in the same direction are attached to an object to be cooled such as an electronic device. 2 is a front view showing the state of the backflow prevention shutter when all of the three cooling fans shown in FIG. 1 are operating, and FIG. 3 is the center of the three cooling fans shown in FIG. FIG. 4 is a plan view of the cooling device shown in FIG. 2 as viewed from the lower side in the vertical direction when one unit is stopped and two units on both sides are operating. In addition, in each figure, the same code | symbol shows the same part.

図１において、冷却装置１は、３台（複数台）の軸流式の冷却ファン１１ａ，１１ｂ，１１ｃと、逆流防止シャッタ−１２ab，１２bcと、ストッパ−１３と、通風ダクト１４とから構成されている。前記冷却装置１は、電子機器等の被冷却対象２の外箱２１に取り付けられ、当該外箱２１内の発熱電子機器（図示省略）に熱的に結合された放熱フィン２２を冷却する冷却風を発生する。 In FIG. 1, the cooling device 1 includes three (a plurality of) axial-flow cooling fans 11 a, 11 b, and 11 c, backflow prevention shutters 12 ab and 12 bc, a stopper 13, and a ventilation duct 14. ing. The cooling device 1 is a cooling air that is attached to an outer box 21 of an object 2 to be cooled such as an electronic device, and cools heat radiating fins 22 that are thermally coupled to a heat generating electronic device (not shown) in the outer box 21. Is generated.

前記冷却ファン１１ａ，１１ｂ，１１ｃは、前記放熱フィン２２の羅列方向と同方向に羅列して隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する。前記隣接した冷却ファン１１ａ，１１ｂ，１１ｃの外壁面は、相隣る冷却ファンの外壁面との間に隙間が実質的に生じないように隣接し、また、前記通風ダクト１４内に形成された冷却風路１４１の内壁面１４２との間に隙間が実質的に生じないように前記冷却風路１４１の内壁面１４２に面した状態に、前記冷却ファン１１ａ，１１ｂ，１１ｃは、前記通風ダクト１４内に配設され固定される。なお、前記冷却ファン１１ａ，１１ｂ，１１ｃの各々は、図１の事例では、前記放熱フィン２２の鉛直方向真上に配設され、その出力冷却風は何れも前記放熱フィン２２の方向へ向けて鉛直方向下向きに生起する。 The cooling fans 11a, 11b, and 11c are arranged adjacent to each other in the same direction as the arrangement direction of the radiating fins 22, and generate cooling air in the same direction, which is substantially parallel to each other. The outer wall surfaces of the adjacent cooling fans 11a, 11b, and 11c are adjacent to each other so that a gap is not substantially formed between the outer wall surfaces of adjacent cooling fans, and is formed in the ventilation duct 14. The cooling fans 11a, 11b, and 11c face the inner wall surface 142 of the cooling air passage 141 so that a gap is not substantially formed between the cooling air passage 141 and the inner wall surface 142 of the cooling air passage 141. It is disposed and fixed inside. Each of the cooling fans 11a, 11b, and 11c is disposed directly above the radiating fin 22 in the case of FIG. 1, and the output cooling air is directed toward the radiating fin 22. It occurs vertically downward.

前記逆流防止シャッタ−１２ab，１２bcは、何れも矩形板状部１２１と、当該矩形板状部１２１の枢動中心となる軸１２２とで構成されている。前記逆流防止シャッタ−１２ab，１２bcの矩形板状部１２１は、何れもその両側の側面に、前記冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の風力を受け易くする凹凸が形成されるように、前記冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風とほぼ直交する相離間した棒状の突起部1211，1212を有している。前記逆流防止シャッタ−１２ab，１２bcの軸１２２は、何れも対応する前期矩形板状部１２１の鉛直方向上端部（換言すれば前記冷却ファン１１ａ，１１ｂ，１１ｃ側の端部）に一体に設けられ、前記被冷却対象２に設けられた軸受２３に内端側が支承されている。 Each of the backflow prevention shutters 12ab and 12bc is composed of a rectangular plate portion 121 and a shaft 122 serving as a pivot center of the rectangular plate portion 121. The rectangular plate-like portions 121 of the backflow prevention shutters 12ab and 12bc are formed so as to have concavities and convexities that make it easy to receive the wind of the output cooling air from the cooling fans 11a, 11b, and 11c. It has rod-like protrusions 1211 and 1212 which are spaced apart from each other and substantially orthogonal to the output cooling air of the cooling fans 11a, 11b and 11c. The shafts 122 of the backflow prevention shutters 12ab and 12bc are integrally provided at the upper end of the corresponding rectangular plate 121 in the vertical direction (in other words, the end of the cooling fans 11a, 11b, and 11c). The inner end side is supported by a bearing 23 provided on the object 2 to be cooled.

前記軸受２３に前記軸１２２を介して可枢動に支承された前記逆流防止シャッタ−１２abは、その軸１２２が、前記冷却ファン１１ａ，１１ｂ間に両冷却ファン１１ａ，１１ｂに近接して配設されている。この構成により、前記逆流防止シャッタ−１２abの重心を、前記枢動の中心より前記冷却風の下流側としてある。 The backflow prevention shutter 12ab pivotally supported on the bearing 23 via the shaft 122 has its shaft 122 disposed between the cooling fans 11a and 11b and close to the cooling fans 11a and 11b. Has been. With this configuration, the center of gravity of the backflow prevention shutter 12ab is located downstream of the cooling air from the pivot center.

前記軸受２３に前記軸１２２を介して可枢動に支承された前記逆流防止シャッタ−１２bcは、その軸１２２が、前記冷却ファン１１ｂ，１１ｃ間に両冷却ファン１１ｂ，１１ｃに近接して配設されている。この構成により、前記逆流防止シャッタ−１２bcの重心を、前記枢動の中心より前記冷却風の下流側としてある。 The backflow prevention shutter 12bc pivotally supported on the bearing 23 via the shaft 122 has its shaft 122 disposed between the cooling fans 11b and 11c in the vicinity of the cooling fans 11b and 11c. Has been. With this configuration, the center of gravity of the backflow prevention shutter 12bc is located downstream of the cooling air from the pivot center.

前記逆流防止シャッタ−１２ab，１２bcは何れも、前述の構成により、定常時は常時、図１および図２に示すように、重力により前記軸受２３を支点に鉛直方向下方に（前記各冷却ファン１１ａ，１１ｂ，１１ｃによって生起される各冷却風の方向Ｗａ，Ｗｂ，Ｗｃと平行に）、前記軸１２２が上側（前記冷却風の上流側）および前記矩形板状部１２１が下側（前記冷却風の下流側）の状態で、垂下している。 As shown in FIGS. 1 and 2, the backflow prevention shutters 12ab and 12bc are always vertically lowered with the bearing 23 as a fulcrum by gravity as shown in FIGS. , 11b, 11c, parallel to the direction Wa, Wb, Wc of each cooling air, the shaft 122 is on the upper side (upstream side of the cooling air), and the rectangular plate portion 121 is on the lower side (the cooling air) It is drooping in the state of the downstream side.

前記ストッパ−１３は、前記垂下状態の前記逆流防止シャッタ−１２ab，１２bc間の中央で且つ各前記矩形板状部１２１の先端部（前記冷却風の下流側の端部）に対向した位置に配設され前記被冷却対象２側に固定されている。 The stopper 13 is arranged at the center between the backflow-preventing shutters 12ab and 12bc in the suspended state and at the position facing the front end of each rectangular plate 121 (the end on the downstream side of the cooling air). And is fixed to the object to be cooled 2 side.

前記通風ダクト１４は、前記被冷却対象２の外箱２１に取り付けられ、その鉛直方向上端部（前記冷却風の上流側の端部）に空気吸込口１４３（前記冷却風路１４１の入り口）を、鉛直方向下端部（前記冷却風の下流側の端部）に空気吹出口１４４（前記冷却風路１４１の入り口）を、それぞれ有している。 The ventilation duct 14 is attached to the outer box 21 of the object 2 to be cooled, and an air suction port 143 (an inlet of the cooling air passage 141) is provided at an upper end portion in the vertical direction (an upstream end portion of the cooling air). The air blower outlet 144 (the inlet of the cooling air passage 141) is respectively provided at the lower end in the vertical direction (end on the downstream side of the cooling air).

前記外箱２１内の発熱電子機器（図示省略）に熱的に結合された前記放熱フィン２２は、前記冷却ファン１１ａ，１１ｂによって生起される冷却風により冷却される冷却領域ＣＡであり、その冷却風上流側端ＣＡＥは、前記垂下状態の前記逆流防止シャッタ−１２ab，１２bcの各矩形板状部１２１の先端部（前記冷却風の下流側の端部）から所定距離Ｌ１だけ前記冷却風の下流側に離れた位置に在る（図２参照）。 The radiating fins 22 thermally coupled to the heat generating electronic devices (not shown) in the outer box 21 are cooling areas CA that are cooled by cooling air generated by the cooling fans 11a and 11b. The wind upstream side end CAE is downstream of the cooling air by a predetermined distance L1 from the tip end portion (the end portion on the downstream side of the cooling air) of each rectangular plate-like portion 121 of the backflow prevention shutters 12ab and 12bc in the suspended state. It is in a position away from the side (see FIG. 2).

前記逆流防止シャッタ−１２ab，１２bcの前記冷却風が流れる方向（鉛直方向）の長さＬ２と前記各冷却ファン１１ａ，１１ｂ，１１ｃの前記冷却風と直交する方向の長さＬ３との関係は、Ｌ２＞Ｌ３としてある（図２参照）。 The relationship between the length L2 of the backflow prevention shutters 12ab and 12bc in the direction in which the cooling air flows (vertical direction) and the length L3 of each of the cooling fans 11a, 11b and 11c in the direction perpendicular to the cooling air is: L2> L3 (see FIG. 2).

次に、図２および図３によって動作の説明をする。 Next, the operation will be described with reference to FIGS.

図２は冷却ファン１１ａ，１１ｂ，１１ｃが何れも正常動作している状態（定常時）における逆流防止シャッタ−１２ab，１２bcの状態を示してある。この定常時の状態においては、図示のように逆流防止シャッタ−１２ab，１２bcは何れも、その重心を、その枢動中心より前記冷却風の下流側としてあるので、重力により軸受２３を支点に鉛直方向下方に（各冷却ファン１１ａ，１１ｂ，１１ｃによって生起される各冷却風の方向Ｗａ，Ｗｂ，Ｗｃと平行に）、前記軸１２２が上側（冷却風の上流側）および矩形板状部１２１が下側（冷却風の下流側）の状態で、垂下している。 FIG. 2 shows the state of the backflow prevention shutters 12ab and 12bc when the cooling fans 11a, 11b and 11c are all operating normally (in a steady state). In this steady state, as shown in the figure, the backflow prevention shutters 12ab and 12bc have their center of gravity at the downstream side of the cooling air from the pivot center, so that the bearing 23 is vertically supported by gravity. Downward in the direction (parallel to the direction Wa, Wb, Wc of each cooling air generated by each cooling fan 11a, 11b, 11c), the shaft 122 is on the upper side (upstream side of the cooling air) and the rectangular plate-like portion 121 is It hangs in the state of the lower side (downstream side of cooling air).

逆流防止シャッタ−１２ab，１２bcの状態は、その重心を、その枢動中心より前記冷却風の下流側としてあるので、冷却ファン１１ａ，１１ｂ，１１ｃの運転開始前（定常時）や、定期点検時の冷却ファン１１ａ，１１ｂ，１１ｃの運転停止時（定常時）においても、図２に示すように、前述と同じく、重力により軸受２３を支点に鉛直方向下方に（各冷却ファン１１ａ，１１ｂ，１１ｃによって生起される各冷却風の方向Ｗａ，Ｗｂ，Ｗｃと平行に）、前記軸１２２が上側（冷却風の上流側）および矩形板状部１２１が下側（冷却風の下流側）の状態で、垂下している。換言すれば、逆流防止シャッタ−１２ab，１２bcは、自力開放機能を持たせる構成にしてある。 The backflow prevention shutters 12ab and 12bc are in the state where the center of gravity is located downstream of the cooling air from the pivot center. Therefore, before the cooling fans 11a, 11b and 11c are started to operate (during steady state) or during regular inspections. 2, when the operation of the cooling fans 11a, 11b, and 11c is stopped (steady state), as shown in FIG. 2, the bearings 23 are supported by gravity downward in the vertical direction as described above (respective cooling fans 11a, 11b, and 11c). In the state where the shaft 122 is on the upper side (upstream side of the cooling air) and the rectangular plate-shaped portion 121 is on the lower side (downstream side of the cooling air). , Drooping. In other words, the backflow prevention shutters 12ab and 12bc are configured to have a self-opening function.

前述のように、逆流防止シャッタ−１２ab，１２bcの状態は、冷却ファン１１ａ，１１ｂ，１１ｃの運転開始前（定常時）や、定期点検時の冷却ファン１１ａ，１１ｂ，１１ｃの運転停止時（定常時）においても、図２に示すように、前述と同じく、重力により軸受２３を支点に鉛直方向下方に（各冷却ファン１１ａ，１１ｂ，１１ｃによって生起される各冷却風の方向Ｗａ，Ｗｂ，Ｗｃと平行に）、前記軸１２２が上側（冷却風の上流側）および矩形板状部１２１が下側（冷却風の下流側）の状態で垂下しているので、冷却ファン１１ａ，１１ｂ，１１ｃの定常運転時においては、冷却ファン１１ａ，１１ｂ，１１ｃによって生起される各冷却風は、その風力で逆流防止シャッタ−１２ab，１２bcを開く必要がない。従って、前述の図１０に例示した従来装置に比べ改善されて、冷却領域ＣＡ（図１における放熱フィン２２の占有領域）の冷却風上流側端ＣＡＥの全域に亘って、各冷却ファン１１ａ，１１ｂ，１１ｃによって生起される各冷却風の方向と冷却風量Ｐｗは、矢印で示してあるように殆ど同じであり、しかも、当該冷却風量Ｐｗは、逆流防止シャッタ−１２ab，１２bcが無い状態の場合と殆ど同じである。従って、逆流防止シャッターに起因する冷却ファンの冷却能力の低下を、図１０に例示した従来装置に比べて極めて僅少に抑えることができ、効率的に冷却領域ＣＡ（図１の放熱フィン２２）を冷却できる。なお、前述の図２および後述の図３における各冷却風の方向と冷却風量Ｐｗは、図１０と同様にベクトル量として矢印で図示してある。 As described above, the backflow prevention shutters 12ab and 12bc are in a state before the cooling fans 11a, 11b and 11c are started (in a steady state) or when the cooling fans 11a, 11b and 11c are stopped during a regular inspection (fixed). Even in the normal state, as shown in FIG. 2, the direction of each cooling wind Wa, Wb, Wc generated by each cooling fan 11a, 11b, 11c is lowered downward in the vertical direction with the bearing 23 as a fulcrum by gravity as described above. In parallel, the shaft 122 is suspended on the upper side (upstream side of the cooling air) and the rectangular plate-like portion 121 is on the lower side (downstream side of the cooling air), so that the cooling fans 11a, 11b, 11c During steady operation, the cooling air generated by the cooling fans 11a, 11b, and 11c does not need to open the backflow prevention shutters 12ab and 12bc with the wind force. Accordingly, the cooling fans 11a and 11b are improved over the conventional apparatus illustrated in FIG. 10 and over the entire area of the cooling air upstream end CAE of the cooling area CA (the area occupied by the radiation fins 22 in FIG. 1). , 11c, the direction of each cooling air and the cooling air volume Pw are almost the same as shown by the arrows, and the cooling air volume Pw is the same as in the case where the backflow prevention shutters 12ab and 12bc are not provided. It is almost the same. Therefore, the decrease in the cooling capacity of the cooling fan due to the backflow prevention shutter can be suppressed to a very small extent as compared with the conventional apparatus illustrated in FIG. Can be cooled. Note that the direction of each cooling air and the cooling air amount Pw in FIG. 2 described above and FIG. 3 described later are indicated by arrows as vector amounts as in FIG.

図３は冷却ファン１１ａ，１１ｂ，１１ｃのうち中央の冷却ファン１１ｂが停止し両端の冷却ファン１１ａ，１１ｃが何れも正常動作している状態（非定常時）における逆流防止シャッタ−１２ab，１２bcの状態を示してある。このような非定常時の状態下では、停止中の中央の冷却ファン１１ｂによる冷却風の風量は０となるので、動作中の前記両端の冷却ファン１１ａ，１１ｃによって生起されている冷却風が逆流防止シャッタ−１２ab，１２bcの突起部1211，1212を停止中の中央の冷却ファン１１ｂ側に押し、停止中の中央の冷却ファン１１ｂ側からは冷却風が突起部1211，1212を押さなくなる。従って、逆流防止シャッタ−１２ab，１２bcが軸受２３中心を支点にして枢動し、停止冷却ファン１１ｂ側に傾斜して、図３に示すように動作中の冷却ファン１１ａ，１１ｃによって生起される冷却風の上流側から下流側へ面積が漸次拡大する冷却風路を、動作中の冷却ファン１１ａ，１１ｃの各々の下流側に形成する。この場合、軸受２３中心を支点にして枢動して傾斜する逆流防止シャッタ−１２ab，１２bcは、何れもその先端部（冷却風下流側の端部）がストッパ−１３に当接し、当該当接により前記枢動による前記傾斜の角度がストッパ−１３により制限される。換言すれば、動作中の冷却ファン１１ａ，１１ｃによって生起される各冷却風の風力に多少強弱があっても、各逆流防止シャッタ−１２ab，１２bcの前記傾斜の角度θab，θbcは、ストッパ−１３によって、同じ角度に保たれる。これにより、各逆流防止シャッタ−１２ab，１２bcは、動作中の冷却ファン１１ａ，１１ｃから停止した冷却ファン１１ｂへの冷却風の逆流Ｒｗを抑えるとともに、作動中の冷却ファン１１ａ，１１ｃが出力した冷却風Ｗａ，Ｗｃを、停止した冷却ファン１１ｂの出力側の下流に向けて前記傾斜に沿って導き、各逆流防止シャッタ−１２ab，１２bcの下流側端部から冷却風の方向に所定距離Ｌ１離間した位置の冷却領域（図１の放熱器２）の冷却風上流側端の全域に亘って均一な空気の流れ（前記ベクトル量である矢印）Ｐｗを作り、冷却領域（図１の放熱器２）を均一に冷却することができる。 FIG. 3 shows the backflow prevention shutters 12ab and 12bc when the central cooling fan 11b of the cooling fans 11a, 11b and 11c is stopped and the cooling fans 11a and 11c at both ends are operating normally (unsteady state). The state is shown. In such an unsteady state, the amount of cooling air by the central cooling fan 11b that is stopped is zero, so that the cooling air generated by the cooling fans 11a and 11c at both ends during operation flows backward. The projections 1211 and 1212 of the prevention shutters 12ab and 12bc are pushed toward the central cooling fan 11b being stopped, and cooling air does not push the projections 1211 and 1212 from the central cooling fan 11b being stopped. Therefore, the backflow prevention shutters 12ab and 12bc pivot about the bearing 23 center, tilt toward the stop cooling fan 11b, and are caused by the cooling fans 11a and 11c in operation as shown in FIG. A cooling air passage whose area gradually increases from the upstream side to the downstream side of the wind is formed on the downstream side of each of the operating cooling fans 11a and 11c. In this case, the backflow prevention shutters 12ab and 12bc pivoting and tilting with the bearing 23 center as a fulcrum are in contact with the stopper 13 at their tip portions (end portions on the downstream side of the cooling air). Therefore, the angle of the inclination by the pivot is limited by the stopper 13. In other words, even if the wind force of each cooling air generated by the cooling fans 11a and 11c in operation is somewhat strong and weak, the inclination angles θab and θbc of the backflow prevention shutters 12ab and 12bc are set to the stopper 13. Is kept at the same angle. As a result, each of the backflow prevention shutters 12ab and 12bc suppresses the backflow Rw of the cooling air from the operating cooling fans 11a and 11c to the stopped cooling fan 11b and the cooling output from the operating cooling fans 11a and 11c. The winds Wa and Wc are guided along the inclination toward the downstream side of the output side of the stopped cooling fan 11b, and are separated by a predetermined distance L1 in the direction of the cooling wind from the downstream end portions of the backflow prevention shutters 12ab and 12bc. A uniform air flow (arrow which is the vector amount) Pw is created over the entire area of the cooling air upstream side end of the cooling area (radiator 2 in FIG. 1), and the cooling area (radiator 2 in FIG. 1). Can be cooled uniformly.

この発明の実施の形態１によれば、前述のように、被冷却対象２への冷却風路１４１内に隣接して配設され夫々ほぼ平行な同方向の冷却風を生起する複数台の冷却ファン１１ａ，１１ｂ，１１ｃおよび前記冷却風路１４１内における前記隣接する冷却ファンの間に当該冷却ファン側が枢着された逆流防止シャッタ−１２ab，１２bcを備え、前記逆流防止シャッタ−１２ab，１２bcは、前記隣接する冷却ファンが双方（冷却ファン１１ａと１１ｂ、あるいは冷却ファン１１ｂと１１ｃ）とも動作している場合は当該隣接する冷却ファンに生起される冷却風と平行をなし、当該隣接する冷却ファンの何れか一方の停止時は動作中の冷却ファンに生起される冷却風の力によって枢動し前記停止冷却ファン側に傾斜して前記動作中の冷却ファンに生起される冷却風の上流側から下流側へ面積が漸次拡大する冷却風路を形成する動作をする。従って、定常時には逆流防止シャッタ−１２ab，１２bcは、自力で開放し、冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の風力を開放に利用しないので、冷却ファンの冷却能力の低下を少なくし、しかも複数台の冷却ファンのうちの一部の冷却ファンが停止した場合においても被冷却対象の冷却領域が極力均一に冷却されるようにすることができる。 According to Embodiment 1 of the present invention, as described above, a plurality of cooling units that are arranged adjacent to each other in the cooling air passage 141 to the object to be cooled 2 and generate substantially parallel cooling air in the same direction. Between the fans 11a, 11b, 11c and the adjacent cooling fans in the cooling air passage 141, there are provided backflow prevention shutters 12ab, 12bc pivotally mounted on the cooling fan side, and the backflow prevention shutters 12ab, 12bc are When both the adjacent cooling fans are operating (cooling fans 11a and 11b or cooling fans 11b and 11c), the cooling air is generated in parallel with the cooling air generated in the adjacent cooling fans. When one of the stops, it is pivoted by the force of the cooling air generated in the operating cooling fan, tilted toward the stopped cooling fan, and generated in the operating cooling fan. That the area from the upstream side to the downstream side of the cooling air the operation of forming a gradual cooling air path to increase. Accordingly, the backflow prevention shutters 12ab and 12bc are opened by themselves and the wind power of the output cooling air from the cooling fans 11a, 11b, and 11c is not used for opening, so that the cooling capacity of the cooling fan is reduced. Even when some of the plurality of cooling fans are stopped, the cooling area to be cooled can be cooled as uniformly as possible.

また、この発明の実施の形態１によれば、前述のように、逆流防止シャッタ−１２ab，１２bcの重心を、逆流防止シャッタ−１２ab，１２bcの枢動中心より冷却風の下流側としたので、例えばバネ等の動力を使用しなくても、逆流防止シャッタ−１２ab，１２bcは定常時に自力で開放する。 Further, according to the first embodiment of the present invention, as described above, the center of gravity of the backflow prevention shutters 12ab and 12bc is on the downstream side of the cooling air from the pivot center of the backflow prevention shutters 12ab and 12bc. For example, the backflow prevention shutters 12ab and 12bc are opened by themselves during normal operation without using power such as a spring.

また、この発明の実施の形態１によれば、前述のように、前記逆流防止シャッタ−１２ab，１２bcは、前記隣接する冷却ファンが双方（冷却ファン１１ａと１１ｂ、あるいは冷却ファン１１ｂと１１ｃ）とも動作している場合は、当該隣接する冷却ファンに生起される冷却風と、重力によって平行をなし、当該隣接する冷却ファンの何れか一方が停止している場合は動作中の冷却ファンに生起される冷却風が、前記重力に抗して前記逆流防止シャッタ−１２ab，１２bcを枢動させるので、故障等により冷却ファンの何れか一方が停止している場合は殆ど無いことから、冷却ファン１１ａ，１１ｂ，１１ｃに生起される冷却風を、非冷却対象２の冷却に極めて効率的に利用することができる。 Further, according to Embodiment 1 of the present invention, as described above, the backflow prevention shutters 12ab and 12bc have both the adjacent cooling fans (cooling fans 11a and 11b or cooling fans 11b and 11c). When operating, the cooling air generated by the adjacent cooling fan is parallel to the gravity, and when one of the adjacent cooling fans is stopped, it is generated by the operating cooling fan. Cooling air pivots the backflow prevention shutters 12ab and 12bc against the gravity, so that there is almost no case where one of the cooling fans is stopped due to a failure or the like. The cooling air generated in 11b and 11c can be used very efficiently for cooling the non-cooling target 2.

また、この発明の実施の形態１によれば、前述のように、前記逆流防止シャッタ−１２ab，１２bcは、隣接する冷却ファンの側の面に突起部1211，1212で形成された凹凸を有しているので、冷却ファンの何れか一方が停止した場合、動作中の冷却ファンの出力冷却風により、早く確実に枢動し、早く確実に停止冷却ファンの側へ傾斜し、非冷却対象２の均一冷却を、冷却ファンの何れか一方の停止直後も確実に継続できる。 Further, according to the first embodiment of the present invention, as described above, the backflow prevention shutters 12ab and 12bc have the unevenness formed by the protrusions 1211 and 1212 on the surface of the adjacent cooling fan. Therefore, if any one of the cooling fans stops, it is quickly and reliably pivoted by the output cooling air from the operating cooling fan, and quickly and reliably tilts toward the stop cooling fan. Uniform cooling can be reliably continued even immediately after any one of the cooling fans is stopped.

また、この発明の実施の形態１によれば、前述のように、前記逆流防止シャッタ−１２ab，１２bcの下流側中間部にストッパ−１３を設け、前記逆流防止シャッタ−１２ab，１２bcの前記枢動による傾斜の角度θab，θbcが当該ストッパ−１３により制限されるようにしてあるので、停止冷却ファンの両側の冷却ファンの出力冷却風の強さに多少の差異があっても、各逆流防止シャッタ−１２ab，１２bcの前記傾斜の角度θab，θbcを同じにすることができ、従って、一の冷却ファンが停止しても非冷却対象２の均一冷却を保持できる。 Further, according to the first embodiment of the present invention, as described above, the stopper 13 is provided at the downstream intermediate portion of the backflow prevention shutters 12ab and 12bc, and the pivoting of the backflow prevention shutters 12ab and 12bc is performed. Since the inclination angles θab and θbc are limited by the stopper 13, even if there is a slight difference in the strength of the output cooling air of the cooling fans on both sides of the stop cooling fan, each backflow prevention shutter The inclination angles θab and θbc of −12ab and 12bc can be made the same. Therefore, even when one cooling fan is stopped, the uniform cooling of the non-cooling target 2 can be maintained.

また、この発明の実施の形態１によれば、前記逆流防止シャッタ−１２ab，１２bcの前記冷却風と平行をなす方向の長さＬ２は、前記隣接する冷却ファンから前記被冷却対象までの距離（Ｌ１＋Ｌ２＋α）より短く、前記隣接する冷却ファンの前記冷却風と直角をなす方向の長さＬ３より長い構成としてあり、このような構成により、冷却ファン１１ａ，１１ｂ，１１ｃの何れの冷却ファンが停止しても、動作中の冷却ファンから停止冷却ファンへの冷却風の逆流を防止でき、しかも非冷却対象２の均一冷却を保持できる。 According to the first embodiment of the present invention, the length L2 of the backflow prevention shutters 12ab and 12bc in the direction parallel to the cooling air is the distance from the adjacent cooling fan to the object to be cooled ( L1 + L2 + α), which is longer than the length L3 of the adjacent cooling fan in the direction perpendicular to the cooling air. With such a configuration, any of the cooling fans 11a, 11b, 11c is stopped. However, the backflow of the cooling air from the operating cooling fan to the stop cooling fan can be prevented, and the uniform cooling of the non-cooling target 2 can be maintained.

即ち、前述の説明では、中央の冷却ファン１１ｂが停止した場合について例示したが、例えば、冷却ファン１１ａが停止した場合は、前述の中央の冷却ファン１１ｂが停止した場合と同じ原理で、前記逆流防止シャッタ−１２abが、前記通風ダクト１４の前記逆流防止シャッタ−１２ab側の内壁面１４２ａに当接する方向に枢動して該内壁面１４２ａに当接あるいは当接に近い状態になり、動作中の冷却ファン１１ｂ，１１ｃから冷却ファン１１ａへの逆流は防止され、更に、他の逆流防止シャッタ−１２bcは整流板の機能を呈し、動作中の冷却ファン１１ｂ，１１ｃによる非冷却対象２の均一冷却が保持される。 That is, in the above description, the case where the central cooling fan 11b is stopped is illustrated. However, for example, when the cooling fan 11a is stopped, the reverse flow is based on the same principle as that when the central cooling fan 11b is stopped. The prevention shutter 12ab pivots in a direction in which it comes into contact with the inner wall surface 142a of the ventilation duct 14 on the backflow prevention shutter 12ab side, and comes into contact with or close to the inner wall surface 142a. The backflow from the cooling fans 11b and 11c to the cooling fan 11a is prevented, and the other backflow prevention shutter 12bc has a function of a baffle plate, so that the non-cooling target 2 can be uniformly cooled by the operating cooling fans 11b and 11c. Retained.

同様に、冷却ファン１１ｃが停止した場合も、前述の反対側の冷却ファン１１ａが停止した場合と同じ原理で、前記逆流防止シャッタ−１２bcが、前記通風ダクト１４の前記逆流防止シャッタ−１２bc側の内壁面１４２ｃに当接する方向に枢動して該内壁面１４２ｃに当接あるいは当接に近い状態になり、動作中の冷却ファン１１ａ，１１ｂから冷却ファン１１ｃへの逆流は防止され、更に、他の逆流防止シャッタ−１２abは整流板の機能を呈し、動作中の冷却ファン１１ａ，１１ｂによる非冷却対象２の均一冷却が保持される。 Similarly, when the cooling fan 11c is stopped, the backflow prevention shutter 12bc is disposed on the backflow prevention shutter 12bc side of the ventilation duct 14 on the same principle as when the opposite cooling fan 11a is stopped. It pivots in the direction in which it abuts against the inner wall surface 142c and comes into contact with or close to the inner wall surface 142c, so that backflow from the cooling fans 11a, 11b to the cooling fan 11c during operation is prevented. The reverse flow prevention shutter 12ab functions as a rectifying plate, and maintains uniform cooling of the non-cooling target 2 by the cooling fans 11a and 11b during operation.

なお、前記内壁面１４２ａ，１４２ｃは、図示のように前記逆流防止シャッタ−１２ab，１２bcの枢動平面と略垂直に交わり且つ冷却風と略平行を成す面である。 The inner wall surfaces 142a and 142c are surfaces that intersect the pivot planes of the backflow prevention shutters 12ab and 12bc substantially perpendicularly and are substantially parallel to the cooling air as shown in the figure.

実施の形態２．
前述の図１〜図４においては、軸受２３およびストッパ−１３を非冷却対象２側に取り付けた場合を例示したが、図５に示すように、軸受２３およびストッパ−１３を通風ダクト１４側に取り付けても、前述の図１〜図４と同じ効果を奏する。また、図５の構成の場合は、冷却ファン１１ａ，１１ｂ，１１ｃも通風ダクト１４側に取り付ける構成とすることにより、冷却装置の組み立てを、通風ダクト１４を含めて冷却装置側だけで行うことができ、前述の図１〜図４の構成の場合に比べて、組立工程を簡略化できる。なお、この発明の実施の形態２を例示する図５においては、前述の軸受２３およびストッパ−１３の取り付け形態以外の構成は、前述の図１〜図４と同じであり、従って、図５については、代表的な部品だけに図１〜図４と同一または相当部分に同一符号を付し、説明を割愛する。 Embodiment 2. FIG.
1 to 4 exemplify the case where the bearing 23 and the stopper 13 are attached to the non-cooling target 2 side, but as shown in FIG. 5, the bearing 23 and the stopper 13 are arranged on the ventilation duct 14 side. Even if it attaches, it has the same effect as the above-mentioned FIGS. In the case of the configuration of FIG. 5, the cooling fans 11 a, 11 b, and 11 c are also attached to the ventilation duct 14, so that the cooling device can be assembled only on the cooling device side including the ventilation duct 14. The assembly process can be simplified as compared with the case of the configuration shown in FIGS. In FIG. 5 illustrating the second embodiment of the present invention, the configuration other than the mounting form of the bearing 23 and the stopper 13 is the same as that in FIGS. The same reference numerals are assigned to the same or corresponding parts as in FIGS.

実施の形態３．
前述の図１〜図５の事例は何れも、冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の方向を鉛直方向の下向きにし、冷却ファン１１ａ，１１ｂ，１１ｃの鉛直方向の下側に逆流防止シャッタ−１２ab，１２bcを配設した場合を例示したが、図６および図７に例示してあるように、逆流防止シャッタ−１２ab，１２bcに、軸１２２より冷却ファン１１ａ，１１ｂ，１１ｃ側（冷却風上流側）に位置して、矩形板状部１２１よりわずかに質量が大きいウェイト１２３を設けて逆流防止シャッタ−１２ab，１２bcの重心を、その枢動中心より前記冷却風の上流側とすれば、冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の方向を鉛直方向の上向きにし、冷却ファン１１ａ，１１ｂ，１１ｃの鉛直方向の上側に逆流防止シャッタ−１２ab，１２bcを配設する構成とすることができる。 Embodiment 3 FIG.
In all of the cases shown in FIGS. 1 to 5 described above, the direction of the output cooling air from the cooling fans 11a, 11b, and 11c is set downward in the vertical direction, and the backflow prevention shutter is provided below the cooling fans 11a, 11b, and 11c in the vertical direction. -12ab and 12bc are illustrated as an example. As illustrated in FIGS. 6 and 7, the backflow prevention shutters 12ab and 12bc are connected to the cooling fans 11a, 11b, and 11c from the shaft 122 (cooling air). If the weight 123, which is slightly larger in mass than the rectangular plate portion 121, is provided on the upstream side) and the center of gravity of the backflow prevention shutters 12ab, 12bc is located upstream of the pivot air from the pivot center, The direction of the output cooling air from the cooling fans 11a, 11b, and 11c is set upward in the vertical direction, and the backflow prevention shutters 12ab and 12bc are provided above the cooling fans 11a, 11b, and 11c in the vertical direction. It can be set as the structure to do.

換言すれば、前述の図１〜図５の事例は何れも、冷却装置１は、冷却装置より鉛直方向の下側にある被冷却対象を冷却する場合に適するが、この発明の実施の形態３を例示する図６および図７では、冷却装置１は、冷却装置より鉛直方向の上側にある被冷却対象を冷却する場合に適する。 In other words, any of the cases shown in FIGS. 1 to 5 described above is suitable when the cooling device 1 cools an object to be cooled that is below the cooling device in the vertical direction. Embodiment 3 of the present invention 6 and 7 illustrating the above, the cooling device 1 is suitable for cooling an object to be cooled that is above the cooling device in the vertical direction.

この発明の実施の形態３においては、前述のように、ウェイト１２３を設けて逆流防止シャッタ−１２ab，１２bcの重心をその枢動中心より前記冷却風の上流側としてあるので、前述の定常時には、重力により図６に示すように逆流防止シャッタ−１２ab，１２bcは何れも鉛直方向上向きになる。また、この発明の実施の形態３の場合も、前述のこの発明の実施の形態１の事例と同様に、中央の冷却ファン１１ｂが故障等により停止し、両端の冷却ファン１１ａ，１１ｃが作動中である場合は、前述のこの発明の実施の形態１の事例の場合と同じ原理、作用、動作をし、逆流防止シャッタ−１２ab，１２bcは、前述のこの発明の実施の形態１の事例の場合と実質的に同じ図６に示す状態となり、前述のこの発明の実施の形態１と同じ効果が得られる。 In the third embodiment of the present invention, as described above, the weight 123 is provided so that the center of gravity of the backflow prevention shutters 12ab and 12bc is on the upstream side of the cooling air from the pivot center. As shown in FIG. 6, the backflow prevention shutters 12ab and 12bc are both directed upward in the vertical direction due to gravity. Also in the case of the third embodiment of the present invention, as in the case of the first embodiment of the present invention described above, the central cooling fan 11b is stopped due to a failure or the like, and the cooling fans 11a and 11c at both ends are operating. The same principle, operation, and operation as in the case of the first embodiment of the present invention, and the backflow prevention shutters 12ab and 12bc are the case of the first embodiment of the present invention. The state shown in FIG. 6 is substantially the same as that of the first embodiment of the present invention described above.

なお、この発明の実施の形態３を例示する図６および図７においては、前述の逆流防止シャッタ−１２ab，１２bcの構成、および前述の冷却ファン１１ａ，１１ｂ，１１ｃと逆流防止シャッタ−１２ab，１２bcと被冷却対象との相対的な配置関係以外の構成は、前述の図１〜図４と同じであり、従って、図６および図７については、代表的な部品だけに図１〜図４と同一または相当部分に同一符号を付し、説明を割愛する。 6 and 7 illustrating the third embodiment of the present invention, the configuration of the backflow prevention shutters 12ab and 12bc described above, and the cooling fans 11a, 11b and 11c and the backflow prevention shutters 12ab and 12bc described above. 1 and FIG. 4 are the same as those in FIGS. 1 to 4 described above, and therefore FIGS. 1 to 4 are only representative components in FIGS. The same reference numerals are assigned to the same or corresponding parts, and the description is omitted.

実施の形態４．
前述の図１〜図５の事例は何れも、冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の方向を鉛直方向の下向きにし、前述の図６および図７の事例は冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の方向を鉛直方向の上向きにした場合を例示してあるが、図８および図９に例示してあるように、各逆流防止シャッタ−１２ab，１２bcの先端部に引っ張りバネ１２４を連結し、前述の定常時に、当該引っ張りバネ等の動力１２４により、冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の方向と平行な状態に各逆流防止シャッタ−１２ab，１２bcを維持する構成にすれば、冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の方向は、鉛直方向の下向きや鉛直方向の上向きに特定されず、任意の方向にすることができる。従って、冷却装置と被冷却対象の相対的位置関係を、鉛直方向の上下関係に特定されることなく、例えば水平方向や斜めの方向など任意の位置関係とすることができる。 Embodiment 4 FIG.
In each of the cases shown in FIGS. 1 to 5, the direction of the output cooling air from the cooling fans 11a, 11b, and 11c is set downward in the vertical direction, and the cases shown in FIGS. 6 and 7 are the cooling fans 11a, 11b, and 11c. In this example, the direction of the output cooling air is set upward in the vertical direction. As illustrated in FIGS. 8 and 9, a tension spring 124 is provided at the tip of each of the backflow prevention shutters 12ab and 12bc. When connected, the backflow prevention shutters 12ab and 12bc are maintained in a state parallel to the direction of the output cooling air of the cooling fans 11a, 11b, and 11c by the power 124 such as the tension spring at the time of the above-described steady state. The direction of the output cooling air from the cooling fans 11a, 11b, and 11c is not specified as a downward direction in the vertical direction or an upward direction in the vertical direction, and can be set in an arbitrary direction. Therefore, the relative positional relationship between the cooling device and the object to be cooled can be set to an arbitrary positional relationship such as a horizontal direction or an oblique direction without being specified as a vertical relationship in the vertical direction.

なお、この発明の実施の形態４の場合も、前述のこの発明の実施の形態１の事例と同様に、中央の冷却ファン１１ｂが故障等により停止し、両端の冷却ファン１１ａ，１１ｃが作動中である場合は、前述のこの発明の実施の形態１の事例の場合と同じ原理、作用、動作をし、逆流防止シャッタ−１２ab，１２bcは、前述のこの発明の実施の形態１の事例の場合と実質的に同じ図９に示す状態となり、前述のこの発明の実施の形態１と同じ効果も得られる。 In the case of the fourth embodiment of the present invention, as in the case of the first embodiment of the present invention described above, the central cooling fan 11b is stopped due to a failure or the like, and the cooling fans 11a and 11c at both ends are operating. The same principle, operation, and operation as in the case of the first embodiment of the present invention, and the backflow prevention shutters 12ab and 12bc are the case of the first embodiment of the present invention. The state shown in FIG. 9 is substantially the same as that of the first embodiment of the present invention described above.

なお、この発明の実施の形態４を例示する図８および図９においては、前述の逆流防止シャッタ−１２ab，１２bcを冷却風と平行に維持する構成以外の構成は、前述の図１〜図４と同じであり、従って、図８および図９については、代表的な部品だけに図１〜図４と同一または相当部分に同一符号を付し、説明を割愛する。 8 and 9 exemplifying Embodiment 4 of the present invention, the configurations other than the configuration for maintaining the above-described backflow prevention shutters 12ab and 12bc in parallel with the cooling air are the same as those described above with reference to FIGS. Accordingly, in FIGS. 8 and 9, only the representative parts are denoted by the same reference numerals as those in FIGS. 1 to 4, and the description thereof is omitted.

前述の図１では放熱フィン２２及び通風ダクト１４は、機器本体等の被冷却対象２の外面に設けられているが、機器本体等の被冷却対象２の内面に設けられていてもよい。また、図１では機器本体等の被冷却対象２は密封されているが、開放されていてもよい。 In FIG. 1 described above, the radiating fins 22 and the ventilation duct 14 are provided on the outer surface of the object to be cooled 2 such as the device main body, but may be provided on the inner surface of the object to be cooled 2 such as the device main body. Moreover, although the to-be-cooled object 2 such as the device main body is sealed in FIG. 1, it may be opened.

図１では冷却ファン１１ａ，１１ｂ，１１ｃは、軸流式冷却ファンを使用しているが、風力を出力する機能を有していれば他の方式の冷却ファン、例えば遠心式冷却ファンを用いてもよい。 In FIG. 1, the cooling fans 11a, 11b, and 11c use axial flow type cooling fans. However, as long as the cooling fans 11a, 11b, and 11c have a function of outputting wind power, other types of cooling fans such as centrifugal cooling fans are used. Also good.

図１ではストッパー１３が設けられているが、冷却ファン１１ａ，・・・の個数が２個の場合、ストッパー１３を設ける必要ない。 In FIG. 1, the stopper 13 is provided. However, when the number of the cooling fans 11a,.

図１では放熱フィン２２は、冷却ファン１１ａ・・・の出力側に設けられているが、冷却ファン１１ａ・・・の入力側に設けられていても良い。また、放熱フィン２２は、冷却ファン１１ａ・・・の出力側と入力側の両方に設けられていてもよい。 In FIG. 1, the radiation fins 22 are provided on the output side of the cooling fans 11a... But may be provided on the input side of the cooling fans 11a. Moreover, the radiation fin 22 may be provided on both the output side and the input side of the cooling fans 11a.

図１において、放熱フィン２２は電子機器等の非冷却対象における電源、ＣＰＵ、パワ−モジュ−ルなどの発熱源に熱的に結合されたヒートシンク上に設けられるが、発熱源の熱を強制空冷等により放出する機能を有していればヒートシンク以外のものが設けられていてもよい。 In FIG. 1, the radiating fins 22 are provided on a heat sink thermally coupled to a heat source such as a power source, a CPU, and a power module in an uncooled target such as an electronic device. Anything other than a heat sink may be provided as long as it has a function of discharging by, for example.

図６では逆流防止シャッタ−１２ab，１２bcは、引っ張りバネ等の動力１２４によって冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の流れと平行な状態に維持されているが、逆流防止シャッタ−１２ab，１２bcを冷却ファン１１ａ，１１ｂ，１１ｃの出力冷却風の流れと平行な状態に維持する機能を有していれば引っ張りバネ１２４以外の動力を用いてもよい。 In FIG. 6, the backflow prevention shutters 12ab and 12bc are maintained in a state parallel to the flow of the output cooling air from the cooling fans 11a, 11b and 11c by the power 124 such as a tension spring. Power other than the tension spring 124 may be used as long as it has a function of maintaining the state in parallel with the flow of the output cooling air from the cooling fans 11a, 11b, and 11c.

図１〜図９では、逆流防止シャッタ−１２ab，１２bcの前記出力冷却風に面する側面に棒状の突起部1211，1212を設けて当該側面に凹凸を形成してあるが、棒状の突起部を設けずに、例えば単なる窪みを設けるなど、当該側面の凹凸の形状は、当該側面に前記出力冷却風の風力が作用し易い形状であればどのような形状であってもよい。 1 to 9, rod-like projections 1211 and 1212 are provided on the side surfaces of the backflow prevention shutters 12ab and 12bc facing the output cooling air, and irregularities are formed on the side surfaces. The shape of the unevenness on the side surface may be any shape as long as the wind force of the output cooling wind easily acts on the side surface, for example, by providing a simple depression without providing it.

この発明の実施の形態１を示す図で、夫々ほぼ平行な同方向の冷却風を生起する３台（複数台）の冷却ファンが電子機器等の被冷却対象の外箱内に取り付けられた状態の冷却装置の事例を正面側から見た斜視図である。In the figure which shows Embodiment 1 of this invention, the state by which the 3 units | sets (plural units) cooling fan which produces the cooling air of the substantially parallel parallel direction are each attached in the outer box of to-be-cooled objects, such as an electronic device It is the perspective view which looked at the example of this cooling device from the front side. この発明の実施の形態１を示す図で、図１に示される３台の冷却ファンが全て動作している場合の逆流防止シャッタ−の状態を示す正面図である。It is a figure which shows Embodiment 1 of this invention, and is a front view which shows the state of the backflow prevention shutter when all the three cooling fans shown by FIG. 1 are operate | moving. この発明の実施の形態１を示す図で、図１に示される３台の冷却ファンのうち中央の１台が停止し両側の２台が動作している場合の逆流防止シャッタ−の状態を示す正面図である。1 is a diagram showing Embodiment 1 of the present invention, and shows a state of a backflow prevention shutter when one of the three cooling fans shown in FIG. 1 is stopped and two on both sides are operating. It is a front view. この発明の実施の形態１を示す図で、図２に示される冷却装置を鉛直方向下側から見た平面図である。It is a figure which shows Embodiment 1 of this invention, and is the top view which looked at the cooling device shown by FIG. 2 from the perpendicular direction lower side. この発明の実施の形態２を示す図で、冷却装置を鉛直方向下側から見た平面図である。It is a figure which shows Embodiment 2 of this invention, and is the top view which looked at the cooling device from the perpendicular direction lower side. この発明の実施の形態３を示す図で、３台の冷却ファンが全て動作している場合の逆流防止シャッタ−の状態を示す正面図である。It is a figure which shows Embodiment 3 of this invention, and is a front view which shows the state of the backflow prevention shutter in case all the three cooling fans are operate | moving. この発明の実施の形態３を示す図で、３台の冷却ファンのうち中央の１台が停止し両側の２台が動作している場合の逆流防止シャッタ−の状態を示す正面図である。It is a figure which shows Embodiment 3 of this invention, and is a front view which shows the state of a backflow prevention shutter when one center of three cooling fans stops and the two of both sides operate | move. この発明の実施の形態４を示す図で、３台の冷却ファンが全て動作している場合の逆流防止シャッタ−の状態を示す正面図である。It is a figure which shows Embodiment 4 of this invention, and is a front view which shows the state of the backflow prevention shutter when all the three cooling fans are operate | moving. この発明の実施の形態４を示す図で、３台の冷却ファンのうち中央の１台が停止し両側の２台が動作している場合の逆流防止シャッタ−の状態を示す正面図である。It is a figure which shows Embodiment 4 of this invention, and is a front view which shows the state of a backflow prevention shutter when one center of 3 cooling fans stops and 2 units | sets of both sides operate | move. 従来装置の問題点およびこの発明の課題を説明するための正面図である。It is a front view for demonstrating the problem of a conventional apparatus and the subject of this invention.

Explanation of symbols

１冷却装置、
１１ａ，１１ｂ，１１ｃ冷却ファン、
１２ab，１２bc 逆流防止シャッタ−、
１２１矩形板状部、
１２２軸、
１２３ウェイト、
１２４引っ張りバネ（動力）、
1211，1212 突起部（凹凸）、
１３ストッパ−、
１４通風ダクト、
１４１冷却風路、
１４２内壁面、
１４３空気吸込口、
１４４空気吹出口、
２被冷却対象、
２１外箱、
２２放熱フィン、
２３軸受、
θab 逆流防止シャッタ−１２abの傾斜角度、
θbc 逆流防止シャッタ−１２bcの傾斜角度、
ＣＡ冷却風により冷却される冷却領域、
ＣＡＥ冷却風上流側端、
Ｐｗ空気の流れ（冷却風の風量）、
Ｒｗ冷却風の逆流、
Ｗａ，Ｗｂ，Ｗｃ出力冷却風。 1 cooling device,
11a, 11b, 11c cooling fan,
12ab, 12bc Backflow prevention shutter,
121 Rectangular plate-shaped part,
122 axes,
123 weights,
124 tension spring (power),
1211, 1212 Protrusion (unevenness),
13 Stopper,
14 Ventilation duct,
141 cooling air passage,
142 inner wall surface,
143 Air inlet,
144 Air outlet,
2 Object to be cooled,
21 Outer box,
22 radiating fins,
23 bearings,
θab Inclination angle of backflow prevention shutter-12ab,
θbc Inclination angle of backflow prevention shutter-12bc,
CA cooling area cooled by cooling air,
CAE Cooling air upstream end,
Pw Air flow (cooling air volume),
Rw Backflow of cooling air,
Wa, Wb, Wc Output cooling air.

Claims

A plurality of cooling fans that are arranged adjacent to each other in the cooling air passage to the object to be cooled and generate cooling air in the same direction, which are substantially parallel to each other
And a backflow prevention shutter having the cooling fan side pivoted between the adjacent cooling fans in the cooling air passage,
The backflow prevention shutter is parallel to the cooling air generated in the adjacent cooling fan when any of the adjacent cooling fans is in operation, and when any one of the adjacent cooling fans is stopped. The area is gradually increased from the upstream side to the downstream side of the cooling air generated by the cooling fan that is pivoted by the force of the cooling air generated in the operating cooling fan and inclined toward the stop cooling fan. A cooling device that operates to form a cooling air passage.

The cooling device according to claim 1, wherein
The cooling apparatus according to claim 1, wherein the backflow prevention shutter has a center of gravity downstream of the cooling air from the pivot center.

The cooling device according to claim 1, wherein
The cooling apparatus according to claim 1, wherein a center of gravity of the backflow prevention shutter is located upstream of the cooling air from the pivot center.

The cooling device according to claim 1, wherein
When the adjacent cooling fan is operating, the backflow prevention shutter is parallel to the cooling air generated by the adjacent cooling fan by gravity,
When any one of the adjacent cooling fans is stopped, the cooling air generated by the cooling fan in operation pivots the backflow prevention shutter against the gravity. apparatus.

The cooling device according to claim 1, wherein
When the adjacent cooling fans are operating, the backflow prevention shutter is parallel to the cooling air generated in the adjacent cooling fans by the power,
When any one of the adjacent cooling fans is stopped, the cooling air generated in the operating cooling fan pivots the backflow prevention shutter against the power. Cooling system.

In the cooling device according to any one of claims 1 to 5,
The cooling device according to claim 1, wherein the backflow prevention shutter has irregularities on the surface of the adjacent cooling fan.

In the cooling device according to any one of claims 1 to 6,
The cooling device according to claim 1, wherein the angle of the inclination due to the pivot of the backflow prevention shutter is limited by a stopper.

In the cooling device according to any one of claims 1 to 7,
The length of the backflow prevention shutter in the direction parallel to the cooling air is shorter than the distance from the adjacent cooling fan to the object to be cooled, and is the direction perpendicular to the cooling air of the adjacent cooling fan. A cooling device characterized by being longer than the length.