JP5078630B2 - Liquid cooling system - Google Patents
Liquid cooling system Download PDFInfo
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- JP5078630B2 JP5078630B2 JP2008005506A JP2008005506A JP5078630B2 JP 5078630 B2 JP5078630 B2 JP 5078630B2 JP 2008005506 A JP2008005506 A JP 2008005506A JP 2008005506 A JP2008005506 A JP 2008005506A JP 5078630 B2 JP5078630 B2 JP 5078630B2
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- 238000001816 cooling Methods 0.000 title claims description 67
- 239000007788 liquid Substances 0.000 title claims description 33
- 239000002826 coolant Substances 0.000 claims description 123
- 239000000110 cooling liquid Substances 0.000 claims description 47
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Description
この発明は、たとえば車両などの半導体電力変換装置に適用され、半導体素子などの発熱体を冷却する液冷式冷却装置に関する。 The present invention relates to a liquid cooling type cooling device that is applied to a semiconductor power conversion device such as a vehicle and cools a heating element such as a semiconductor element.
従来、電子部品の液冷式冷却装置として、上下両カバー板、および両カバー板間に介在させられかつ蛇行状の冷却液通路を形成する開口を有する通路形成板からなるケーシングと、ケーシングの上下両カバー板間において通路形成板の蛇行状冷却液通路の直線部内に配置された扁平管とを備えており、上カバー板における冷却液通路の両端部と対応する部分に冷却液入口および冷却液出口が形成され、上カバー板の上面に、冷却液入口に通じる冷却液流入路を有する入口部材および冷却液出口に通じる冷却液流出路を有する出口部材が接合されたものが知られている（特許文献１参照）。 2. Description of the Related Art Conventionally, as a liquid-cooling type cooling device for electronic components, a casing comprising an upper and lower cover plates, a passage forming plate having an opening interposed between the cover plates and forming a meandering coolant passage, A flat tube disposed in the straight portion of the meandering coolant passage of the passage forming plate between the cover plates, and a coolant inlet and a coolant are provided at portions corresponding to both ends of the coolant passage in the upper cover plate. An outlet is formed, and an upper member of an upper cover plate is known in which an inlet member having a coolant inflow passage leading to a coolant inlet and an outlet member having a coolant outlet passage leading to a coolant outlet are joined ( Patent Document 1).
ところで、特許文献１記載の液冷式冷却装置においては、冷却液は、図６に示すように、ケーシング(50)の流路(51)の閉鎖端面(52)に当たった後に上方に流れ、冷却液出口(55)を通って出口部材(53)の冷却液流出路(54)内に流れ込むことになる。したがって、流路(51)の高さが高くなった場合、流路(51)の下面と閉鎖端面(52)との間の入隅部に比較的大きな渦流(W)が発生し、流通抵抗が高くなって圧力損失が大きくなる。
この発明の目的は、上記問題を解決し、冷却液がケーシングから流出する際の流通抵抗を低減しうる液冷式冷却装置を提供することにある。 An object of the present invention is to provide a liquid cooling type cooling device that solves the above problems and can reduce the flow resistance when the cooling liquid flows out of the casing.
本発明は、上記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.
1)冷却液入口および冷却液出口を有するケーシングと、ケーシングの冷却液出口に接続された流出パイプとを備えており、ケーシングが、先端が閉鎖された冷却液流出部を有するとともに、冷却液流出部の頂壁に冷却液出口が形成され、流出パイプが、冷却液流出部の頂壁における冷却液出口が形成された部分と平行な下壁を有するとともに、流出パイプの下壁に冷却液出口に通じる貫通穴が形成され、冷却液流出部の底壁上面における冷却液出口と対応する部分に、冷却液流出部内に流入した冷却液の流れの向きを上向きに変えるガイド部が設けられている液冷式冷却装置。 1) A casing having a cooling liquid inlet and a cooling liquid outlet, and an outflow pipe connected to the cooling liquid outlet of the casing. The casing has a cooling liquid outflow portion whose tip is closed, and the cooling liquid outflow A coolant outlet is formed on the top wall of the outlet, and the outflow pipe has a lower wall parallel to a portion of the top wall of the coolant outlet where the coolant outlet is formed, and a coolant outlet is formed on the lower wall of the outlet pipe. Is formed in the portion corresponding to the coolant outlet on the bottom wall upper surface of the coolant outflow portion, and a guide portion is provided to change the flow direction of the coolant flowing into the coolant outflow portion upward. Liquid cooling type cooling device.
2)冷却液流出部の底壁上面における冷却液出口と対応する部分に、段部を介して底壁上面と平行な高位部が設けられており、段部および高位部によりガイド部が形成されている上記1)記載の液冷式冷却装置。 2) A portion corresponding to the coolant outlet on the bottom wall top surface of the coolant outflow portion is provided with a high level portion parallel to the top surface of the bottom wall via a step portion, and a guide portion is formed by the step portion and the high level portion. The liquid cooling type cooling device according to 1) above.
3)ガイド部が、冷却液流出部の底壁を変形させることにより形成されている上記1)または2)記載の液冷式冷却装置。 3) The liquid cooling type cooling apparatus according to 1) or 2), wherein the guide part is formed by deforming a bottom wall of the coolant outflow part.
4)ケーシングの冷却液流出部の頂壁下面における冷却液出口よりも基端側の部分に、下方に偏った下方偏位部が設けられている上記1)〜3)のうちのいずれかに記載の液冷式冷却装置。 4) In any one of the above 1) to 3), a downwardly deviating portion biased downward is provided in a portion closer to the base end side than the coolant outlet on the lower surface of the top wall of the coolant outflow portion of the casing. The liquid cooling type cooling apparatus as described.
5)下方偏位部が、冷却液出口に向かって下方に傾斜した傾斜部からなる上記4)記載の液冷式冷却装置。 5) The liquid cooling type cooling apparatus as described in 4) above, wherein the downward deflection portion is an inclined portion inclined downward toward the coolant outlet.
6)下方偏位部が、冷却液流出部の頂壁を変形させることにより形成されている上記4)または5)記載の液冷式冷却装置。 6) The liquid cooling type cooling apparatus according to 4) or 5) above, wherein the downward deflection portion is formed by deforming the top wall of the coolant outflow portion.
7)ケーシングの周壁が、互いに対向する第１の側壁および第２の側壁を備えており、ケーシングにおける両側壁の一端側の部分に冷却液流入部が設けられるとともに、冷却液流入部の頂壁に冷却液入口が形成され、同じく両側壁の他端側の部分に冷却液出口を有する冷却液流出部が設けられ、ケーシング内における第１および第２側壁間でかつ冷却液流入部と冷却液流出部との間の位置に、冷却液が第１および第２側壁の長さ方向に流れる複数の流路からなる並列流路部分が設けられ、ケーシング内における並列流路部分よりも上流側の部分が冷却液流入部に通じる入口ヘッダ部となされるとともに、並列流路部分よりも下流側の部分が冷却流出部に通じる出口ヘッダ部となされている上記1)〜6)のうちのいずれかに記載の液冷式冷却装置。 7) The peripheral wall of the casing includes a first side wall and a second side wall facing each other, and a cooling liquid inflow portion is provided in a portion on one end side of both side walls of the casing, and a top wall of the cooling liquid inflow portion A coolant inlet is formed in the other end of the both side walls, and a coolant outlet is provided between the first and second side walls in the casing. A parallel flow path portion made up of a plurality of flow paths through which the coolant flows in the length direction of the first and second side walls is provided at a position between the outlet portion and upstream of the parallel flow path portion in the casing. Any one of the above 1) to 6), wherein the portion is an inlet header portion that communicates with the coolant inflow portion, and the downstream portion of the parallel flow passage portion is an outlet header portion that communicates with the cooling outflow portion. The liquid cooling type cooling device according to 1.
上記1)〜7)の液冷式冷却装置によれば、ケーシングの冷却液流出部の底壁上面における冷却液出口と対応する部分に、冷却液流出部内に流入した冷却液の流れの向きを上向きに変えるガイド部が設けられているので、冷却液がケーシングの冷却液流出部内から冷却液出口を通って流出パイプに流出する際に、ガイド部の働きによって冷却液の流れ方向が上向きに変えられる。したがって、ケーシングの冷却液流出部の内部高さを、特許文献１記載の液冷式冷却装置の流路の高さと同一にした場合、冷却液流出部内の冷却液出口の近傍に発生する渦流の大きさが特許文献１記載の液冷式冷却装置の場合よりも小さくなり、冷却液が冷却液流出部内から冷却液出口を通って流出パイプに流出する際の流通抵抗が低減されて圧力損失が小さくなる。
According to the liquid cooling type cooling device of the above 1) to 7), the direction of the flow of the cooling liquid flowing into the cooling liquid outflow portion is changed to the portion corresponding to the cooling liquid outlet on the bottom wall upper surface of the cooling liquid outflow portion of the casing. Since the guide section is provided to change upward, when the coolant flows out from the coolant outflow section of the casing through the coolant outlet to the outflow pipe, the flow direction of the coolant changes upward by the action of the guide section. It is done. Therefore, when the internal height of the cooling liquid outflow portion of the casing is the same as the height of the flow path of the liquid cooling type cooling device described in
上記4)の液冷式冷却装置によれば、ケーシングの冷却液流出部内の上下方向の中心線と、流出パイプの上下方向の中心線との距離を短くすることができるので、冷却液が、冷却液流出部内から冷却液出口を通って流出パイプに流出する際の流れの角度を小さくすることが可能になり、その結果冷却液がケーシング内から冷却液出口を通って流出パイプに流出する際の流通抵抗の低減効果が向上する。 According to the liquid cooling type cooling device of the above 4), the distance between the vertical center line in the cooling liquid outflow portion of the casing and the vertical center line of the outflow pipe can be shortened. It is possible to reduce the flow angle when flowing from the cooling liquid outlet to the outlet pipe through the cooling outlet, and as a result, when the cooling liquid flows from the casing through the cooling outlet to the outlet pipe. The effect of reducing the flow resistance is improved.
上記5)の液冷式冷却装置によれば、冷却液がケーシングの冷却液流出部内から冷却液出口を通って流出パイプに流出する際の流通抵抗の低減効果が確実に向上する。 According to the liquid cooling type cooling device of 5), the effect of reducing the flow resistance when the cooling liquid flows out from the cooling liquid outflow portion of the casing through the cooling liquid outlet to the outflow pipe is surely improved.
以下、この発明の実施形態を、図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
以下の説明において、図２の下側を前、上側を後というものとし、図３の上下、左右を上下、左右というものとする。 In the following description, the lower side in FIG. 2 is referred to as the front, the upper side is referred to as the rear, and the upper and lower sides and the left and right sides in FIG.
また、以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
図１〜図３はこの発明による液冷式冷却装置の全体構成を示し、図４および図５はその要部の構成を示す。なお、図１は液冷式冷却装置に発熱体である半導体素子が取り付けられた状態を示す。 1 to 3 show the overall configuration of the liquid cooling type cooling apparatus according to the present invention, and FIGS. 4 and 5 show the configuration of the main part thereof. FIG. 1 shows a state in which a semiconductor element as a heating element is attached to a liquid cooling type cooling device.
図１〜図３において、液冷式冷却装置(1)は、頂壁(3)、底壁(4)および周壁(5)からなるケーシング(2)と、頂壁(3)にろう付されてケーシング(2)内に冷却液を流入させる流入パイプ(6)と、頂壁(3)にろう付されてケーシング(2)内から冷却液を流出させる流出パイプ(7)とを備えている。 1 to 3, the liquid cooling type cooling device (1) is brazed to a casing (2) composed of a top wall (3), a bottom wall (4) and a peripheral wall (5), and the top wall (3). And an inflow pipe (6) for allowing the coolant to flow into the casing (2) and an outflow pipe (7) for brazing the top wall (3) to allow the coolant to flow out of the casing (2). .
図２〜図５に示すように、ケーシング(2)の周壁(5)は、前後方向にのびる垂直状の右側壁(8)（第１側壁）、前後方向にのびるとともに右側壁(8)と対向する垂直状の左側壁(9)（第２側壁）、右側壁(8)および左側壁(9)の後端部どうしを連結する垂直状の後側壁(11)、ならびに右側壁(8)および左側壁(9)の前端部どうしを連結する垂直状の前側壁(12)よりなる。ケーシング(2)の後端部に右側方に突出した冷却液流入部(13)が一体に形成され、同じく前端部に左側方に突出した冷却液流出部(14)が一体に形成されている。冷却液流入部(13)および冷却液流出部(14)の前後方向の幅は全長にわたって等しくなっている。冷却液流入部(13)は、ケーシング(2)の頂壁(3)に連なった頂壁(15)と、ケーシング(2)の底壁(4)に連なった底壁(16)と、ケーシング(2)の後側壁(11)に連なった後側壁(17)と、ケーシング(2)の右側壁(8)に連なるとともに右側壁(8)と直角をなす前側壁(18)と、頂壁(15)、底壁(16)、後側壁(17)および前側壁(18)の右端部に一体に形成された右端壁(19)とよりなり、右端壁(19)により冷却液流入部(13)の先端が閉鎖されている。冷却液流出部(14)は、ケーシング(2)の頂壁(3)に連なった頂壁(21)と、ケーシング(2)の底壁(4)に連なった底壁(22)と、ケーシング(2)の左側壁(9)に連なるとともに左側壁(9)と直角をなす後側壁(23)と、ケーシング(2)の前側壁(12)に連なった前側壁(24)と、頂壁(21)、底壁(22)、後側壁(23)および前側壁(24)の左端部に一体に形成された左端壁(25)とよりなり、左端壁(25)により冷却液流出部(14)の先端が閉鎖されている。そして、冷却液流入部(13)の頂壁(15)の右端部に方形の冷却液入口(26)が形成され、冷却液流出部(14)の頂壁(21)の左端部に方形の冷却液出口(27)が形成されている。 As shown in FIGS. 2 to 5, the peripheral wall (5) of the casing (2) includes a vertical right side wall (8) (first side wall) extending in the front-rear direction, and a right side wall (8) extending in the front-rear direction. Opposite vertical left side wall (9) (second side wall), right side wall (8) and vertical rear side wall (11) connecting the rear ends of left side wall (9), and right side wall (8) And a vertical front side wall (12) connecting the front end portions of the left side wall (9). A coolant inflow portion (13) protruding rightward is integrally formed at the rear end of the casing (2), and a coolant outflow portion (14) protruding leftward is also formed integrally at the front end. . The width in the front-rear direction of the coolant inflow portion (13) and the coolant outflow portion (14) is the same over the entire length. The coolant inflow part (13) includes a top wall (15) connected to the top wall (3) of the casing (2), a bottom wall (16) connected to the bottom wall (4) of the casing (2), and the casing. (2) The rear side wall (17) connected to the rear side wall (11), the front side wall (18) connected to the right side wall (8) of the casing (2) and perpendicular to the right side wall (8), and the top wall (15), the bottom wall (16), the rear side wall (17) and the right end wall (19) integrally formed at the right end of the front side wall (18), the right end wall (19) is a coolant inflow portion ( 13) The tip is closed. The coolant outflow portion (14) includes a top wall (21) connected to the top wall (3) of the casing (2), a bottom wall (22) connected to the bottom wall (4) of the casing (2), and the casing. A rear side wall (23) continuous to the left side wall (9) of (2) and perpendicular to the left side wall (9), a front side wall (24) continuous to the front side wall (12) of the casing (2), and a top wall (21), the bottom wall (22), the rear side wall (23) and the left end wall (25) integrally formed at the left end of the front side wall (24), the left end wall (25) is a coolant outflow portion ( The tip of 14) is closed. Then, a rectangular coolant inlet (26) is formed at the right end of the top wall (15) of the coolant inflow section (13), and a square is formed at the left end of the top wall (21) of the coolant outflow section (14). A coolant outlet (27) is formed.
冷却液流入部(13)および冷却液流出部(14)が一体に形成されたケーシング(2)は、頂壁(3)、周壁(5)の上半部を形成する部分、頂壁(15)、後側壁(17)の上半部を形成する部分、前側壁(18)の上半部を形成する部分、右端壁(19)の上半部を形成する部分、頂壁(21)、後側壁(23)の上半部を形成する部分、前側壁(24)の上半部を形成する部分、および左端壁(25)の上半部を形成する部分からなるアルミニウム製上構成部材(28)と、底壁(4)、周壁(5)の下半部を形成する部分、底壁(16)、後側壁(17)の下半部を形成する部分、前側壁(18)の下半部を形成する部分、右端壁(19)の下半部を形成する部分、底壁(22)、後側壁(23)の下半部を形成する部分、前側壁(24)の下半部を形成する部分、および左端壁(25)の下半部を形成する部分からなるアルミニウム製下構成部材(29)とよりなる。上構成部材(28)の下端部および下構成部材(29)の上端部に、それぞれ外向きフランジ(31)(32)が一体に形成されており、両構成部材(28)(29)の外向きフランジ(31)(32)どうしがろう付されている。上下両構成部材(28)(29)は、それぞれアルミニウム板にプレス加工を施すことにより形成されている。 The casing (2) in which the cooling liquid inflow part (13) and the cooling liquid outflow part (14) are integrally formed is a top wall (3), a part forming the upper half of the peripheral wall (5), the top wall (15 ), A part forming the upper half of the rear side wall (17), a part forming the upper half of the front side wall (18), a part forming the upper half of the right end wall (19), a top wall (21), Aluminum upper component member comprising a portion forming the upper half of the rear side wall (23), a portion forming the upper half of the front side wall (24), and a portion forming the upper half of the left end wall (25) ( 28), the bottom wall (4), the part forming the lower half of the peripheral wall (5), the bottom wall (16), the part forming the lower half of the rear side wall (17), the lower part of the front side wall (18) The part forming the half, the part forming the lower half of the right end wall (19), the bottom wall (22), the part forming the lower half of the rear side wall (23), the lower half of the front side wall (24) And an aluminum lower component member (29) comprising a portion forming the lower half of the left end wall (25). The outward flanges (31) and (32) are integrally formed on the lower end of the upper component (28) and the upper end of the lower component (29), respectively, and are external to both components (28) and (29). Directional flanges (31) and (32) are brazed together. Both the upper and lower constituent members (28) and (29) are formed by pressing each aluminum plate.
ケーシング(2)内における右側壁(8)と左側壁(9)との間でかつ冷却液流入部(13)と冷却液流出部(14)との間の部分に、波頂部(33a)、波底部(33b)および波頂部(33a)と波底部(33b)とを連結する垂直状連結部(33c)からなるアルミニウム製のコルゲートフィン(33)が配置されており、波頂部(33a)がケーシング(2)の頂壁(3)に、波底部(33b)がケーシング(2)の底壁(4)にそれぞれろう付されている。そして、コルゲートフィン(33)によって、前後方向にのびかつ冷却液が前後方向（右側壁(8)および左側壁(9)の長さ方向）に流れる複数の流路(34)が左右方向に並んで形成されており、これにより複数の流路からなる並列流路部分(35)が設けられている。ケーシング(2)内における並列流路部分(35)よりも上流側（後側）の部分が冷却液流入部(13)の冷却液入口(26)に通じる入口ヘッダ部(36)となされるとともに、並列流路部分(35)よりも下流側（前側）の部分が冷却液流出部(14)の冷却液出口(27)に通じる出口ヘッダ部(37)となされている。ケーシング(2)の入口ヘッダ部(36)、出口ヘッダ部(37)および並列流路部分(35)の高さは等しくなっている。また、入口ヘッダ部(36)の右端部の前後方向の幅は、冷却液流入部(13)の前後方向の幅と等しく、出口ヘッダ部(37)の左端部の前後方向の幅は、冷却液流出部(14)の前後方向の幅と等しくなっている。 In the portion between the right side wall (8) and the left side wall (9) in the casing (2) and between the coolant inflow part (13) and the coolant outflow part (14), a wave crest (33a), Corrugated fins (33) made of aluminum comprising a wave bottom part (33b) and a vertical connection part (33c) connecting the wave crest part (33a) and the wave bottom part (33b) are arranged, and the wave crest part (33a) The wave bottom portion (33b) is brazed to the top wall (3) of the casing (2) and the bottom wall (4) of the casing (2). The corrugated fins (33) extend in the front-rear direction and a plurality of flow paths (34) flowing in the front-rear direction (the length direction of the right side wall (8) and the left side wall (9)) are aligned in the left-right direction. Accordingly, a parallel flow path portion (35) composed of a plurality of flow paths is provided. In the casing (2), the upstream (rear) portion of the parallel flow path portion (35) serves as an inlet header portion (36) leading to the coolant inlet port (26) of the coolant inlet portion (13). The downstream side (front side) portion of the parallel flow path portion (35) serves as an outlet header portion (37) communicating with the coolant outlet portion (27) of the coolant outlet portion (14). The inlet header part (36), outlet header part (37) and parallel flow path part (35) of the casing (2) have the same height. The width in the front-rear direction of the right end portion of the inlet header portion (36) is equal to the width in the front-rear direction of the coolant inflow portion (13), and the width in the front-rear direction of the left end portion of the outlet header portion (37) It is equal to the width of the liquid outflow portion (14) in the front-rear direction.
ケーシング(2)の後側壁(11)の全体、すなわち後側壁(11)の内面は、右側壁(8)側から左側壁(9)側に向かって前側に滑らかに傾斜しており、入口ヘッダ部(36)の流路断面積が、冷却液入口(26)側から左側壁(9)側に向かって小さくなっている。また、出口ヘッダ部(37)における右側壁(8)から２０％以下の長さ部分において、前側壁(12)の全体、すなわち前側壁(12)の内面は、左側壁(9)側から右側壁(8)側に向かって後側に傾斜しており、出口ヘッダ部(37)の残りの部分において、前側壁(12)の全体、すなわち前側壁(12)の内面は右側壁(8)および左側壁(9)の内面と直角をなしている。その結果、出口ヘッダ部(37)におけるケーシング(2)の右側壁(8)側から２０％以下の長さ部分の流路断面積が、左側壁(9)側から右側壁(8)側に向かって小さくなっており、出口ヘッダ部(37)の残りの部分の流路断面積が、全長にわたって等しくなっている。 The entire rear side wall (11) of the casing (2), that is, the inner surface of the rear side wall (11), is smoothly inclined forward from the right side wall (8) side toward the left side wall (9) side. The flow path cross-sectional area of the part (36) decreases from the coolant inlet (26) side toward the left side wall (9) side. Further, in the length portion of the outlet header portion (37) that is 20% or less from the right side wall (8), the entire front side wall (12), that is, the inner surface of the front side wall (12), In the remaining part of the outlet header portion (37), the entire front side wall (12), that is, the inner surface of the front side wall (12) is inclined to the right side wall (8). And at right angles to the inner surface of the left side wall (9). As a result, the channel cross-sectional area of the outlet header (37) with a length of 20% or less from the right side wall (8) side of the casing (2) is from the left side wall (9) side to the right side wall (8) side. The channel cross-sectional area of the remaining part of the outlet header part (37) is the same over the entire length.
図４に示すように、冷却液流入部(13)の底壁(16)における冷却液入口(26)と対応する部分に、右方に向かって上方に傾斜した傾斜部(38)が設けられている。傾斜部(38)は、冷却液入口(26)の左端よりも左側の部分から冷却液入口(26)の右端よりも左側の部分にかけて、底壁(16)を変形させることにより形成されている。また、冷却液流入部(13)の頂壁(15)における冷却液入口(26)よりも基端側（左側）の部分に、右方に向かって下方に傾斜した傾斜部からなる下方に偏った下方偏位部(39)が設けられている。下方偏位部(39)は頂壁(15)を部分的に変形させることにより形成されている。 As shown in FIG. 4, an inclined portion (38) inclined upward toward the right is provided at a portion corresponding to the coolant inlet (26) in the bottom wall (16) of the coolant inflow portion (13). ing. The inclined portion (38) is formed by deforming the bottom wall (16) from a portion on the left side of the left end of the coolant inlet (26) to a portion on the left side of the right end of the coolant inlet (26). . Also, in the top wall (15) of the coolant inflow part (13), the base end side (left side) of the coolant inlet (26) is biased downwardly from an inclined part inclined downward to the right. A downward deflection part (39) is provided. The lower deflection part (39) is formed by partially deforming the top wall (15).
図５に示すように、冷却液流出部(14)の底壁(22)における冷却液出口(27)と対応する部分に、段部(41)を介して底壁(22)上面と平行な高位部(42)が設けられており、段部(41)と高位部(42)とによって、冷却液流出部(14)内に流入した冷却液の流れの向きを上向きに変えるガイド部(40)が形成されている。ガイド部(40)は、冷却液出口(27)の右端よりも左側の部分から冷却液出口(27)の左端にかけて、底壁(22)を変形させることにより形成されている。また、冷却液流出部(14)の頂壁(21)における冷却液出口(27)よりも基端側（右側）の部分に、左方に向かって下方に傾斜した傾斜部からなる下方に偏った下方偏位部(43)が設けられている。下方偏位部(43)は頂壁(21)を部分的に変形させることにより形成されている。 As shown in FIG. 5, a portion corresponding to the coolant outlet (27) in the bottom wall (22) of the coolant outflow portion (14) is parallel to the top surface of the bottom wall (22) via the step portion (41). A high portion (42) is provided, and a guide portion (40) that changes the flow direction of the coolant flowing into the coolant outflow portion (14) upward by the step portion (41) and the high portion (42). ) Is formed. The guide portion (40) is formed by deforming the bottom wall (22) from the left side of the right end of the coolant outlet (27) to the left end of the coolant outlet (27). Also, in the top wall (21) of the coolant outflow portion (14), the base end side (right side) of the coolant outlet (27) is biased downwardly from an inclined portion that is inclined downward toward the left. A downward displacement portion (43) is provided. The lower deflection part (43) is formed by partially deforming the top wall (21).
流入パイプ(6)は、一端が開口するとともに他端が閉鎖された横断面方形の角筒状であり、下壁(6a)の閉鎖端部（左端部）に冷却液流入部(13)の冷却液入口(26)と合致する方形の貫通穴(44)が形成されている。流入パイプ(6)は、下壁(6a)が冷却液流入部(13)の頂壁(15)における冷却液入口(26)が形成された部分、すなわち傾斜部(39)よりも右側の部分と平行となるように、下壁(6a)下面における貫通穴(44)の周囲の部分が、額縁状のスペーサ(45)を介して冷却液流入部(13)の頂壁(15)上面における冷却液入口(26)の周囲の部分にろう付されている。なお、図示は省略したが、流入パイプ(6)の開口端部に、冷却液供給用配管が接続される。 The inflow pipe (6) is a rectangular tube having a square cross section with one end opened and the other end closed, and the coolant inflow section (13) is connected to the closed end (left end) of the lower wall (6a). A square through hole (44) is formed that matches the coolant inlet (26). The inflow pipe (6) has a lower wall (6a) where the coolant inlet (26) is formed in the top wall (15) of the coolant inflow part (13), that is, a part on the right side of the inclined part (39). The portion around the through hole (44) on the lower surface of the lower wall (6a) is parallel to the upper surface of the top wall (15) of the coolant inflow portion (13) through the frame spacer (45). The portion around the coolant inlet (26) is brazed. Although not shown, a coolant supply pipe is connected to the open end of the inflow pipe (6).
流出パイプ(7)は、一端が開口するとともに他端が閉鎖された横断面方形の角筒状であり、下壁(7a)の閉鎖端部（右端部）に冷却液流出部(14)の冷却液出口(27)と合致する方形の貫通穴(46)が形成されている。流出パイプ(7)は、下壁(7a)が冷却液流出部(14)の頂壁(21)における冷却液出口(27)が形成された部分、すなわち傾斜部(43)よりも左側の部分と平行となるように、下壁(7a)下面における貫通穴(46)の周囲の部分が、額縁状のスペーサ(47)を介して冷却液流出部(14)の頂壁(21)上面における冷却液出口(27)の周囲の部分にろう付されている。なお、図示は省略したが、流出パイプ(7)の開口端部に、冷却液排出用配管が接続される。 The outflow pipe (7) is a rectangular tube having a rectangular cross section with one end opened and the other end closed, and the coolant outflow portion (14) is connected to the closed end (right end) of the lower wall (7a). A square through hole (46) is formed that matches the coolant outlet (27). The outflow pipe (7) is a portion where the lower wall (7a) is formed with the coolant outlet (27) in the top wall (21) of the coolant outflow portion (14), that is, a portion on the left side of the inclined portion (43). The portion around the through hole (46) on the lower surface of the lower wall (7a) is parallel to the upper surface of the top wall (21) of the coolant outflow portion (14) via the frame-shaped spacer (47). The portion around the coolant outlet (27) is brazed. Although not shown, a coolant discharge pipe is connected to the open end of the outflow pipe (7).
発熱体である半導体素子(P)は、板状絶縁部材(I)を介してケーシング(2)の頂壁(3)外面に接合されている。 The semiconductor element (P), which is a heating element, is joined to the outer surface of the top wall (3) of the casing (2) via the plate-like insulating member (I).
上記構成の液冷式冷却装置(1)において、冷却液供給用配管から流入パイプ(6)内に送り込まれた冷却液は、貫通穴(44)および冷却液入口(26)を通ってケーシング(2)の冷却液流入部(13)内に流入する。このとき、冷却液流入部(13)の底壁(16)の傾斜部(38)と、同頂壁(15)の下方偏位部(39)との働きによって、流通抵抗が低減され、圧力損失の増大が防止される。冷却液流入部(13)内に流入した冷却液は入口ヘッダ部(36)内に流入し、入口ヘッダ部(36)において並列流路部分(35)の全流路(34)に均一に分流し、全流路(34)内を前方に流れる。このとき、ケーシング(2)の後側壁(11)の全体、すなわち後側壁(11)の内面が、右側壁(8)側から左側壁(9)側に向かって前側に滑らかに傾斜し、その結果入口ヘッダ部(36)の流路断面積が、冷却液入口(26)側から左側壁(9)側に向かって小さくなっていることによって、並列流路部分(35)の全流路(34)での流速分布、すなわち並列流路部分(35)の幅方向の流速分布が均一化される。 In the liquid cooling type cooling device (1) having the above configuration, the cooling liquid fed into the inflow pipe (6) from the cooling liquid supply pipe passes through the through hole (44) and the cooling liquid inlet (26), and the casing ( It flows into the coolant inflow part (13) of 2). At this time, the flow resistance is reduced by the action of the inclined portion (38) of the bottom wall (16) of the coolant inflow portion (13) and the downward deflection portion (39) of the top wall (15), and the pressure is reduced. Increase in loss is prevented. The coolant that has flowed into the coolant inflow section (13) flows into the inlet header section (36) and is uniformly distributed to all the flow paths (34) of the parallel flow path section (35) at the inlet header section (36). And flows forward in the entire flow path (34). At this time, the entire rear side wall (11) of the casing (2), that is, the inner surface of the rear side wall (11) smoothly inclines forward from the right side wall (8) side toward the left side wall (9) side. As a result, the flow path cross-sectional area of the inlet header portion (36) decreases from the coolant inlet (26) side toward the left side wall (9) side, so that all the flow paths of the parallel flow path portion (35) ( The flow velocity distribution in 34), that is, the flow velocity distribution in the width direction of the parallel flow path portion (35) is made uniform.
並列流路部分(35)の流路(34)内を前方に流れた冷却液は、出口ヘッダ部(37)内に入るとともに、出口ヘッダ部(37)内を左方に流れて冷却液流出部(14)内に入る。冷却液流出部(14)内に入った冷却液は、冷却液出口(27)および貫通穴(46)を通って流出パイプ(7)内に流入する。このとき、冷却液流出部(14)の底壁(22)に形成されたガイド部(40)の働きによって、冷却液の流れ方向が上向きに変えられることになり、冷却液流出部(14)の冷却液出口(27)の近傍に発生する渦流の大きさが比較的小さくなる。したがって、冷却液がケーシング(2)内から冷却液出口(27)を通って流出パイプ(7)に流出する際の流通抵抗が低減されて圧力損失の増大が防止される。また、冷却液流出部(14)の頂壁(21)の下方偏位部(43)の働きによって、ケーシング(2)内部の上下方向の中心線と、流出パイプ(7)の上下方向の中心線との距離が短くなるので、冷却液流出部(14)内から冷却液出口(27)を通って流出パイプ(7)に流出する際の流れの角度を小さくすることが可能になる。したがって、冷却液が冷却液流出部(14)内から冷却液出口(27)を通って流出パイプ(7)に流出する際の流通抵抗の低減効果が向上する。流出パイプ(7)内に流入した冷却液は、冷却液排出用配管内に送り込まれる。 The coolant that has flowed forward in the flow path (34) of the parallel flow path portion (35) enters the outlet header portion (37), and flows to the left in the outlet header portion (37) to flow out of the coolant. Enter the part (14). The coolant that has entered the coolant outlet (14) flows into the outlet pipe (7) through the coolant outlet (27) and the through hole (46). At this time, by the action of the guide portion (40) formed on the bottom wall (22) of the coolant outflow portion (14), the flow direction of the coolant is changed upward, and the coolant outflow portion (14) The size of the vortex generated in the vicinity of the coolant outlet (27) is relatively small. Therefore, the flow resistance when the coolant flows from the casing (2) through the coolant outlet (27) to the outflow pipe (7) is reduced, and an increase in pressure loss is prevented. Also, by the action of the downward deflection portion (43) of the top wall (21) of the coolant outflow portion (14), the vertical center line inside the casing (2) and the vertical center of the outflow pipe (7) Since the distance to the line is shortened, it is possible to reduce the angle of the flow when flowing out from the cooling liquid outflow portion (14) through the cooling liquid outlet (27) to the outflow pipe (7). Therefore, the effect of reducing the flow resistance when the coolant flows from the coolant outflow portion (14) through the coolant outlet (27) to the outflow pipe (7) is improved. The coolant that has flowed into the outflow pipe (7) is fed into the coolant discharge pipe.
そして、半導体素子(P)から発せられる熱は、絶縁部材(I)、ケーシング(2)の頂壁(3)およびコルゲートフィン(33)を経て流路(34)内を流れる冷却液に伝わり、半導体素子(P)が冷却される。 The heat generated from the semiconductor element (P) is transferred to the coolant flowing in the flow path (34) through the insulating member (I), the top wall (3) of the casing (2) and the corrugated fin (33), The semiconductor element (P) is cooled.
(1)：液冷式冷却装置
(2)：ケーシング
(7)：流出パイプ
(7a)：下壁
(8)：右側壁（第１側壁）
(9)：左側壁（第２側壁）
(13)：冷却液流入部
(14)：冷却液流出部
(15)：頂壁
(21)：頂壁
(22)：底壁
(26)：冷却液入口
(27)：冷却液出口
(34)：流路
(35)：並列流路部分
(36)：入口ヘッダ部
(37)：出口ヘッダ部
(40)：ガイド部
(41)：段部
(42)：高位部
(43)：下方偏位部
(46)：貫通穴
(1): Liquid cooling type cooling device
(2): Casing
(7): Outflow pipe
(7a): Lower wall
(8): Right side wall (first side wall)
(9): Left side wall (second side wall)
(13): Coolant inlet
(14): Coolant outflow part
(15): Top wall
(21): Top wall
(22): Bottom wall
(26): Coolant inlet
(27): Coolant outlet
(34): Flow path
(35): Parallel flow path
(36): Entrance header
(37): Exit header
(40): Guide section
(41): Step
(42): High part
(43): Downward deflection
(46): Through hole
Claims (7)
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| JP2008005506A JP5078630B2 (en) | 2008-01-15 | 2008-01-15 | Liquid cooling system |
| US12/350,441 US9671179B2 (en) | 2008-01-15 | 2009-01-08 | Liquid-cooled-type cooling device |
| EP14154096.3A EP2730879B8 (en) | 2008-01-15 | 2009-01-14 | Liquid-cooled-type cooling device |
| EP09150555.2A EP2080978B1 (en) | 2008-01-15 | 2009-01-14 | Liquid-cooled-type cooling device |
| KR20090002815A KR101488027B1 (en) | 2008-01-15 | 2009-01-14 | Liquid-cooled-type cooling device |
| CN200910003546.1A CN101489371B (en) | 2008-01-15 | 2009-01-15 | Liquid-cooled-type cooling device |
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| JP5651972B2 (en) * | 2010-03-17 | 2015-01-14 | 富士電機株式会社 | Stack structure of water-cooled semiconductor cooling unit |
| US8902589B2 (en) | 2010-04-21 | 2014-12-02 | Fuji Electric Co., Ltd. | Semiconductor module and cooler |
| JP5692368B2 (en) * | 2011-04-26 | 2015-04-01 | 富士電機株式会社 | Semiconductor module cooler and semiconductor module |
| EP2523215B1 (en) * | 2011-05-13 | 2015-02-18 | ABB Oy | Liquid cooling element |
| JP6482955B2 (en) * | 2015-06-02 | 2019-03-13 | 昭和電工株式会社 | Liquid cooling system |
| DE102015211160A1 (en) * | 2015-06-17 | 2016-12-22 | Zf Friedrichshafen Ag | Arrangement for cooling a power module |
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| JP2003051689A (en) * | 2001-08-06 | 2003-02-21 | Toshiba Corp | Heating element cooling unit |
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