JP4836057B2 - Cooling unit - Google Patents

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JP4836057B2
JP4836057B2 JP2008283419A JP2008283419A JP4836057B2 JP 4836057 B2 JP4836057 B2 JP 4836057B2 JP 2008283419 A JP2008283419 A JP 2008283419A JP 2008283419 A JP2008283419 A JP 2008283419A JP 4836057 B2 JP4836057 B2 JP 4836057B2
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heat
heat pipe
spreader
cooling unit
thermally connected
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JP2010113845A (en
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修 本村
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Toshiba Home Technology Corp
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Description

本発明は、発熱する電子部品を備えた機器の冷却ユニットに関する。   The present invention relates to a cooling unit for equipment including electronic components that generate heat.

従来、液晶テレビなどの液晶表示器のバックライトとして発光素子などの電子部品が用いられているが（特許文献１）、発熱した発光素子は温度上昇により機能が低下し、十分な機能が発揮できないため、発光素子を多数個用いて、個々の発光素子の負荷を軽減させることで、発熱する発光素子の均熱化を図っていた。
特開２００４−９２４４６号公報 Conventionally, an electronic component such as a light emitting element is used as a backlight of a liquid crystal display such as a liquid crystal television (Patent Document 1). For this reason, by using a large number of light emitting elements to reduce the load on each light emitting element, the heat generating light emitting elements are soaked in temperature.
JP 2004-92446 A

しかし、従来の構成では、発光素子が多数個必要であり、また温度上昇に対して十分な機能が発揮できないため、発熱する発光素子の冷却が大きな課題となっていた。   However, in the conventional configuration, a large number of light emitting elements are required, and a sufficient function cannot be exhibited with respect to the temperature rise, so that cooling of the light emitting elements that generate heat has been a big problem.

そこで本発明は上記課題を解消するものであり、発熱する発光素子の均熱化に優れた冷却ユニットを提供することを目的とする。   In view of the above, an object of the present invention is to solve the above-described problems and to provide a cooling unit excellent in soaking a heat-emitting element.

請求項１の発明の冷却ユニットでは、複数の発光素子を冷却する冷却ユニットであって、前記複数の発光素子を均熱化するヒートパイプを備え、断面略Ｌ字型に形成されて、外側の一面に前記複数の発光素子を装着し、内側の二面に前記ヒートパイプを熱接続した熱伝導部材を備えたことを特徴とする。 The cooling unit of the invention of claim 1, a cooling unit for cooling the light emitting device of multiple, comprising a heat pipe for temperature control of said plurality of light emitting elements, are formed in a substantially L-shaped, outer The plurality of light emitting elements are mounted on one surface, and a heat conducting member is provided on the inner two surfaces. The heat pipe is thermally connected .

請求項２の発明の冷却ユニットでは、前記熱伝導部材を金属材料から形成するとともに、前記ヒートパイプを断面略円筒型又は略扁平型としたことを特徴とする。 In the cooling unit according to a second aspect of the present invention, the heat conducting member is formed of a metal material, and the heat pipe is formed in a substantially cylindrical shape or a substantially flat shape in cross section.

請求項１の発明によれば、発光素子が均熱化され、発光素子の異常な温度上昇を防止することにより、温度上昇による機能低下などの障害を防止できる。また、略Ｌ字型の熱伝導部材を介して、発光素子とヒートパイプを熱接続したので、熱接続面積が増加して一層の均熱化が図れる。 According to the first aspect of the present invention, the temperature of the light-emitting element is equalized, and an abnormal temperature rise of the light-emitting element is prevented, thereby preventing a failure such as a function deterioration due to a temperature rise. In addition, since the light emitting element and the heat pipe are thermally connected via the substantially L-shaped heat conduction member, the heat connection area is increased, and the temperature can be further equalized.

請求項２の発明によれば、高い熱伝導性を備える金属材料からなる熱伝導部材と、接触面積の大きい円筒型又は平坦型のヒートパイプを用いたことにより熱伝導性が向上し、更に均熱化が図れる。 According to the invention of claim 2, the heat conductivity is improved by using a heat conductive member made of a metal material having high heat conductivity and a cylindrical or flat heat pipe having a large contact area. Heating can be achieved.

以下、本発明における好ましい実施例について、添付図面を参照しながら説明する。なお下記の実施例に示されている冷却ユニットは、液晶表示器を備えた液晶テレビやノート型パソコン等の機器に収納されるが、それ以外の液晶表示器を搭載した機器に内蔵若しくは外付けされてもよい。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The cooling units shown in the following examples are housed in devices such as liquid crystal televisions and notebook computers equipped with liquid crystal displays, but they are built-in or externally attached to devices equipped with other liquid crystal displays. May be.

図１および図５は、本発明による冷却ユニットの第１実施例を示す。これらの各図において、１は断面が略Ｌ字型の銅板等の熱伝導性に優れた金属板からなるスプレッダ（ヒートスプレッダ）であり、スプレッダ１の一方の辺を第１の辺部２とし、この第１の辺部２と略垂直に設けられた他方の辺を第２の辺部３とする。   1 and 5 show a first embodiment of a cooling unit according to the invention. In each of these drawings, 1 is a spreader (heat spreader) made of a metal plate excellent in thermal conductivity such as a substantially L-shaped copper plate, and one side of the spreader 1 is defined as a first side 2. The other side provided substantially perpendicular to the first side 2 is referred to as a second side 3.

第１の辺部２の外面である第１の外面４には、機器の液晶表示器であるディスプレイ（図示せず）のバックライトとして発光素子たる白色ＬＥＤ５がスプレッダ１の長手方向に沿ってアレイ（小道）状に複数個並んで装着されている。   On the first outer surface 4, which is the outer surface of the first side 2, white LEDs 5 serving as light emitting elements as a backlight of a display (not shown) that is a liquid crystal display of the device are arrayed along the longitudinal direction of the spreader 1. A plurality of (paths) are mounted side by side.

また、第１の辺部２及び第２の辺部３におけるそれぞれの内面である第１の内面６及び第２の内面７によって囲まれた領域には、金属熱伝導部材の長手方向に沿って格納された第１の放熱体としての断面円筒型の第１のヒートパイプ８を備えている。ここでこの第１のヒートパイプ８は、熱伝導性に優れた例えば銅などの管体内部に微少量の作動液を注入し、管体内部で作動液を還流させるもので、移動する作動液によって極めて優れた熱応答性が得られる。この第１のヒートパイプ８は、第１の内面６および第２の内面７に半田付けによる固着やサーモグリス（熱伝導グリス）等の介在による、いわゆる熱接続可能な状態で装着されている。   Moreover, the area | region enclosed by the 1st inner surface 6 and the 2nd inner surface 7 which is each inner surface in the 1st edge part 2 and the 2nd edge part 3 is along the longitudinal direction of a metal heat conductive member. A first heat pipe 8 having a cylindrical cross section as a stored first radiator is provided. Here, the first heat pipe 8 is for injecting a small amount of hydraulic fluid into a tube body such as copper having excellent thermal conductivity and refluxing the hydraulic fluid inside the tube body. Therefore, extremely excellent thermal response can be obtained. The first heat pipe 8 is attached to the first inner surface 6 and the second inner surface 7 in a so-called thermally connectable state by fixing such as soldering or thermo grease (thermal conductive grease).

さらに、第２の辺部３における第２の内面７の反対側の面である第２の外面９は、液晶表示器の筐体側に備えた筐体側放熱体として第２の外面９と平行に備えた放熱板１０に第２の放熱体１１を介して熱接続されている。ここでの放熱板１０は、熱伝導性に優れたアルミニウム、銅、さらに銀、金、マグネシウム等の金属材料から形成されたものとする。   Further, the second outer surface 9, which is the surface opposite to the second inner surface 7 in the second side 3, is parallel to the second outer surface 9 as a casing-side heat radiator provided on the casing side of the liquid crystal display. It is thermally connected to the provided heat sink 10 via the second heat radiator 11. Here, the heat radiating plate 10 is made of a metal material such as aluminum, copper, silver, gold, and magnesium having excellent thermal conductivity.

ここで、第２の放熱体１１の構造について説明すると、第２の外面９と放熱板１０との間で、放熱板１０の一面に対して均等に配設されるように、スプレッダ１の長手方向と直交する方向に略直線状に設けた管体をスプレッダ１の長手方向に所定の間隔をおいて複数配設して、第２の外面９と放熱板１０とを熱接続可能に設けた第２のヒートパイプ１２と、第２の外面９と放熱板１０との間において、隣接する第２のヒートパイプ１２間に配設されて、第２の外面９と放熱板１０とを熱接続するとともに、隣接する第２のヒートパイプ１２を熱接続する第３のヒートパイプ１３と、第２の外面９と放熱板１０との間において、放熱板１０の一面に均等に配設された複数の第２のヒートパイプ１２における両端に配設された各第２のヒートパイプ１２の外側の側面に熱接続されるとともに、第２の外面９と放熱板１０とを熱接続可能に設けた第４のヒートパイプ１４を備えている。   Here, the structure of the second radiator 11 will be described. The longitudinal direction of the spreader 1 is arranged between the second outer surface 9 and the radiator plate 10 so as to be evenly arranged with respect to one surface of the radiator plate 10. A plurality of tubular bodies provided substantially linearly in a direction orthogonal to the direction are arranged at predetermined intervals in the longitudinal direction of the spreader 1 so that the second outer surface 9 and the heat radiating plate 10 can be thermally connected. Between the 2nd heat pipe 12, the 2nd outer surface 9, and the heat sink 10, it is arrange | positioned between the adjacent 2nd heat pipes 12, and the 2nd outer surface 9 and the heat sink 10 are heat-connected. In addition, a plurality of heat pipes 13 disposed evenly on one surface of the heat radiating plate 10 between the third heat pipe 13 that thermally connects the adjacent second heat pipes 12 and the second outer surface 9 and the heat radiating plate 10. Each second heat pie disposed at both ends of the second heat pipe 12 While it is thermally connected to the outer side of the 12, and a heat radiating plate 10 and the second outer surface 9 comprises a fourth heat pipe 14 provided so as to be thermally connected.

第２乃至第４のヒートパイプ１２,１３,１４は、第１のヒートパイプ８の説明の際に前述した管体を、第２の外面９及び放熱板１０との密着性を高めるために断面略扁平状に形成したものである。   The second to fourth heat pipes 12, 13, and 14 are cross-sectional views of the tubular body described in the description of the first heat pipe 8 in order to improve the adhesion between the second outer surface 9 and the heat radiating plate 10. It is formed in a substantially flat shape.

また第２のヒートパイプ１２は、第２のヒートパイプ１２全体をスプレッダ１の長手方向と略直交する方向に略直線状に設け、第１の一側平坦面１５の下方を第２の外面９に熱接続されるとともに、第１の一側平坦面１５と反対側の面である第１の他側平坦面１６の全面が放熱板１０に熱接続されている。   Further, the second heat pipe 12 is provided so that the entire second heat pipe 12 is substantially linear in a direction substantially orthogonal to the longitudinal direction of the spreader 1, and the second outer surface 9 is below the first one-side flat surface 15. The entire surface of the first other flat surface 16, which is the surface opposite to the first one flat surface 15, is thermally connected to the heat sink 10.

さらに第３のヒートパイプ１３は、第３のヒートパイプ１３全体を略Ｕ字型に形成したものであり、互いに略平行に備えた一対のアーム部１７の幅狭部分である側面部分１８をそれぞれ隣接する第２のヒートパイプ１２の幅狭部分である側面部分１９に熱接続されるとともに、一対のアーム部１７の基端側を略直線状に連結した基端部２０を第２の外面９の長手方向に沿って配設し、その基端部２０側の第２の一側平坦面２１が第２の外面９に熱接続され、第３のヒートパイプ１３における一対のアーム部１７及び基端部２０を含む第２の一側平坦面２１と反対側の面である第２の他側平坦面２２の全面が放熱板１０に熱接続されたものである。   Furthermore, the third heat pipe 13 is formed by substantially forming the third heat pipe 13 in a substantially U shape, and the side portions 18 which are the narrow portions of the pair of arm portions 17 provided substantially parallel to each other are respectively provided. A base end portion 20 that is thermally connected to the side surface portion 19 that is a narrow portion of the adjacent second heat pipe 12 and that connects the base end sides of the pair of arm portions 17 in a substantially straight line is connected to the second outer surface 9. The second one-side flat surface 21 on the base end portion 20 side is thermally connected to the second outer surface 9, and the pair of arm portions 17 and the base in the third heat pipe 13 are arranged. The entire surface of the second other flat surface 22, which is the surface opposite to the second one flat surface 21 including the end portion 20, is thermally connected to the heat sink 10.

また第４のヒートパイプ１４は、第４のヒートパイプ１４全体を略Ｌ字型に形成したものであり、第１の一側辺部２３の幅狭部分である側面部分２４を隣接する第２のヒートパイプ１２の側面部分１９に熱接続されるとともに、第１の他側辺部２５を第２の外面９の長手方向に沿って配設し、その第１の他側辺部２５側の第３の一側平坦面２６が第２の外面９に熱接続されるとともに、第４のヒートパイプ１４における第１の一側辺部２３及び第１の他側辺部２５を含む第３の一側平坦面２６と反対側の面である第３の他側平坦面２７の全面が放熱板１０に熱接続されたものである。   In addition, the fourth heat pipe 14 is formed by substantially forming the fourth heat pipe 14 in a substantially L shape, and the second heat pipe 14 adjacent to the side portion 24 that is the narrow portion of the first side portion 23 is adjacent to the second heat pipe 14. The heat pipe 12 is thermally connected to the side surface portion 19, and the first other side portion 25 is disposed along the longitudinal direction of the second outer surface 9. The third one-side flat surface 26 is thermally connected to the second outer surface 9, and includes a first one side part 23 and a first other side part 25 in the fourth heat pipe 14. The entire surface of the third other flat surface 27, which is the surface opposite to the one flat surface 26, is thermally connected to the heat sink 10.

次に、上記構成においてその作用を説明すると、図示しない機器の電源部より複数の白色ＬＥＤ５に電力が供給されると、液晶表示器（図示せず）のバックライトとして複数の白色ＬＥＤ５が連続点灯し、液晶表示器を明るく照らす。   Next, the operation of the above configuration will be described. When power is supplied to a plurality of white LEDs 5 from a power supply unit of a device (not shown), the plurality of white LEDs 5 are continuously lit as a backlight of a liquid crystal display (not shown). And brightly illuminate the LCD.

白色ＬＥＤ５が点灯し続けるのに伴って、各白色ＬＥＤ５からは熱が発生するが、この熱はスプレッダ１の第１の辺部２の第１の内面６に熱接続された第１のヒートパイプ８に速やかに伝達され、スプレッダ１における白色ＬＥＤ５の装着部分だけが集中的に温度上昇するのを防止して、各白色ＬＥＤ５の均熱化が行われる。   As the white LED 5 continues to be lit, heat is generated from each white LED 5. This heat is a first heat pipe thermally connected to the first inner surface 6 of the first side 2 of the spreader 1. 8, the temperature of only the mounting portion of the white LED 5 in the spreader 1 is prevented from intensively rising, and the temperature of each white LED 5 is equalized.

また第１のヒートパイプ８に達した熱は、そこからスプレッダ１の第２の辺部３を通過して、スプレッダ１の第２の辺部３の第２の外面９と熱接続している第２乃至第４のヒートパイプ１２,１３,１４に伝わり、第２乃至第４のヒートパイプ１２,１３,１４とそれぞれ熱接続された放熱板１０へと移動する。第２乃至第４のヒートパイプ１２,１３,１４は、スプレッダ１及び放熱板１０との接触面積を極力増やすために断面扁平状に形成されており、スプレッダ１に達した熱を各一側平坦面１５,２１,２６より効率よく奪うとともに、その熱を各他側平坦面１６,２２,２７から放熱板１０へ効率よく移動させることができる。そして、放熱板１０に移動した熱は筐体外部へ放出されることとなる。   Further, the heat reaching the first heat pipe 8 passes through the second side 3 of the spreader 1 from there and is thermally connected to the second outer surface 9 of the second side 3 of the spreader 1. It is transmitted to the second to fourth heat pipes 12, 13, and 14 and moves to the heat radiating plate 10 thermally connected to the second to fourth heat pipes 12, 13, and 14, respectively. The second to fourth heat pipes 12, 13, and 14 are formed to have a flat cross section in order to increase the contact area between the spreader 1 and the heat radiating plate 10 as much as possible, and the heat reaching the spreader 1 is flattened on each side. The heat can be efficiently removed from the surfaces 15, 21, and 26, and the heat can be efficiently transferred from the other flat surfaces 16, 22, and 27 to the heat sink 10. And the heat which moved to the heat sink 10 will be discharge | released outside a housing | casing.

ここで、略Ｌ字型の銅板からなるスプレッダ１の内側の二面である第１の内面６及び第２の内面７に熱接続された第１のヒートパイプ８により、スプレッダ１の外側の一面である第１の外面４に装着された複数の白色ＬＥＤ５などの発熱電子部品が均熱化され、白色ＬＥＤ５の温度上昇による発光機能の低下などの障害を一層防止できる。   Here, one side of the outer side of the spreader 1 by the first heat pipe 8 thermally connected to the first inner surface 6 and the second inner surface 7 which are the two inner surfaces of the spreader 1 made of a substantially L-shaped copper plate. The heat-generating electronic components such as the plurality of white LEDs 5 mounted on the first outer surface 4 are soaked, and it is possible to further prevent troubles such as deterioration of the light emitting function due to the temperature rise of the white LEDs 5.

また、略Ｕ字型の第３のヒートパイプ１３の基端部２０と略Ｌ字型の第４のヒートパイプ１４の第１の他側辺部２５を、それぞれスプレッダ１の第２の外面９の長手方向に沿って配設し、基端部２０及び第１の他側辺部２５のそれぞれの一側平坦面２１,２６を第２の外面９に熱接続することにより、第３乃至第４のヒートパイプ１３,１４とスプレッダ１との熱接続面積を大きくとることができる。また第３乃至第４のヒートパイプ１３,１４において、それぞれの他側平坦面２２,２７全面を筐体の放熱板１０に熱接続したことにより、第３乃至第４のヒートパイプ１３,１４と放熱板１０の熱接続面積を大きくすることができ、白色ＬＥＤ５などの発熱する電子部品が均熱化されるとともに、放熱板１０による放熱を更に効率よく行うことができるため、白色ＬＥＤ５の温度上昇による発光機能の低下などの障害が一層防止できる。   Further, the base end portion 20 of the substantially U-shaped third heat pipe 13 and the first other side portion 25 of the substantially L-shaped fourth heat pipe 14 are respectively connected to the second outer surface 9 of the spreader 1. The one side flat surfaces 21 and 26 of the base end portion 20 and the first other side portion 25 are thermally connected to the second outer surface 9, respectively. The heat connection area between the heat pipes 13 and 14 and the spreader 1 can be increased. Further, in the third to fourth heat pipes 13 and 14, the entire other flat surfaces 22 and 27 are thermally connected to the heat radiating plate 10 of the housing, so that the third to fourth heat pipes 13 and 14 and The heat connection area of the heat sink 10 can be increased, the heat-generating electronic components such as the white LED 5 can be soaked, and the heat dissipation by the heat sink 10 can be performed more efficiently. It is possible to further prevent troubles such as deterioration of the light emitting function due to.

複数の第２のヒートパイプ１２を放熱板１０の一面に対して均等に配設したことにより、スプレッダ１からの熱を第２のヒートパイプ１２を介して放熱板１０全面に均一に移動させることができるので、放熱板１０による放熱を効果的に行うことができ、白色ＬＥＤ５の均熱化を一層効果的に行うことができる。   By disposing the plurality of second heat pipes 12 evenly with respect to one surface of the heat radiating plate 10, heat from the spreader 1 is uniformly moved to the entire surface of the heat radiating plate 10 through the second heat pipe 12. Therefore, the heat radiation by the heat radiating plate 10 can be performed effectively, and the white LED 5 can be more efficiently heated.

さらに、第２のヒートパイプ１２の側面部分１９に第３乃至第４のヒートパイプ１３,１４の側面部分１８,２４を熱接続して、それぞれの他側平坦面１６,２２,２７を放熱板１０に熱接続したことにより、第２乃至第４のヒートパイプ１２,１３,１４からなる第２の放熱部１１と放熱板１０との熱接続面積を増加させて、スプレッダ１からの熱を効果的に放熱板１０に移動させることができ、白色ＬＥＤ５の均熱化をさらに効果的に行うことができる。   Further, the side surface portions 18 and 24 of the third to fourth heat pipes 13 and 14 are thermally connected to the side surface portion 19 of the second heat pipe 12, and the other flat surfaces 16, 22 and 27 are connected to the heat sink. 10, the heat connection area between the second heat radiating portion 11 including the second to fourth heat pipes 12, 13, and 14 and the heat radiating plate 10 is increased, so that the heat from the spreader 1 is effective. Therefore, the white LED 5 can be more efficiently heated.

以上のように本実施例では請求項１に対応しており、液晶表示器のバックライトとして備えた複数の白色ＬＥＤ５を冷却する冷却ユニットであって、複数の白色ＬＥＤ５を均熱化する第１のヒートパイプ８を備えている。   As described above, the present embodiment corresponds to claim 1 and is a cooling unit for cooling a plurality of white LEDs 5 provided as a backlight of a liquid crystal display, wherein the first white LEDs 5 are soaked. The heat pipe 8 is provided.

この場合、白色ＬＥＤ５が均熱化され、白色ＬＥＤ５の異常な温度上昇を防止することにより、温度上昇による発光機能低下などの障害を防止できる。   In this case, the white LED 5 is soaked and the abnormal temperature rise of the white LED 5 is prevented, so that it is possible to prevent a failure such as a decrease in light emitting function due to the temperature rise.

また本実施例は請求項１に対応しており、断面略Ｌ字型に形成されて、外側の一面として第１の外面４に複数の白色ＬＥＤ５を装着し、内側の二面として第１の内面６及び第２の内面７に第１のヒートパイプ８を熱接続した熱伝導部材としてスプレッダ１を備えている。 Further, this embodiment corresponds to claim 1 , is formed in a substantially L-shaped cross section, has a plurality of white LEDs 5 mounted on the first outer surface 4 as one outer surface, and the first two surfaces on the inner two surfaces. The spreader 1 is provided as a heat conductive member in which the first heat pipe 8 is thermally connected to the inner surface 6 and the second inner surface 7.

この場合、略Ｌ字型のスプレッダ１を介して、白色ＬＥＤ５と第１のヒートパイプ８を熱接続したので、熱接続面積が増加して一層の均熱化が図れる。   In this case, since the white LED 5 and the first heat pipe 8 are thermally connected via the substantially L-shaped spreader 1, the heat connection area is increased and further soaking can be achieved.

さらに本実施例は請求項２に対応しており、スプレッダ１を銅板等の熱伝導性に優れた金属材料から形成するとともに、第１のヒートパイプ８を断面略円筒型としている。 Further, this embodiment corresponds to claim 2 , and the spreader 1 is made of a metal material having excellent thermal conductivity such as a copper plate, and the first heat pipe 8 has a substantially cylindrical cross section.

この場合、高い熱伝導性を備える金属材料からなるスプレッダ１と、接触面積の大きい円筒型の第１のヒートパイプ８を用いたことにより熱伝導性が向上し、更に均熱化が図れる。   In this case, by using the spreader 1 made of a metal material having high thermal conductivity and the cylindrical first heat pipe 8 having a large contact area, the thermal conductivity is improved, and the temperature can be equalized.

また本実施例は、液晶表示器のバックライトとして備えた複数の白色ＬＥＤ５を冷却する冷却ユニットであって、複数の白色ＬＥＤ５を装着した熱伝導部材としてのスプレッダ１と、スプレッダ１と液晶表示器の筐体側に備えた放熱板１０とを熱接続するヒートパイプとして第２乃至第４のヒートパイプ１２,１３,１４とを備えている。 In addition, the present embodiment is a cooling unit for cooling a plurality of white LEDs 5 provided as a backlight of a liquid crystal display, and includes a spreader 1 as a heat conducting member equipped with the plurality of white LEDs 5, a spreader 1 and a liquid crystal display The second to fourth heat pipes 12, 13, and 14 are provided as heat pipes that thermally connect the heat sink 10 provided on the housing side.

この場合、白色ＬＥＤ５が均熱化されると共に、白色ＬＥＤ５の性能劣化をもたらす温度上昇を抑制することができる。   In this case, the temperature of the white LED 5 is equalized, and the temperature rise that causes the performance deterioration of the white LED 5 can be suppressed.

さらに本実施例は、第３のヒートパイプ１３及び第４のヒートパイプ１４をそれぞれ略Ｕ字型または略Ｌ字型に形成し、第３乃至第４のヒートパイプ１３,１４のそれぞれの一辺として基端部２０及び第１の他側辺部２５をスプレッダ１に熱接続するとともに、第３乃至第４のヒートパイプ１３,１４の他辺として一対のアーム部１７及び第１の一側辺部２３を筐体に備えた放熱体としての放熱板１０に熱接続している。 Further, in the present embodiment , the third heat pipe 13 and the fourth heat pipe 14 are formed in a substantially U shape or a substantially L shape, respectively, and are used as one side of each of the third to fourth heat pipes 13 and 14. The base end portion 20 and the first other side portion 25 are thermally connected to the spreader 1, and the pair of arm portions 17 and the first one side portion are used as the other sides of the third to fourth heat pipes 13 and 14. 23 is thermally connected to a heat radiating plate 10 as a heat radiating body provided in the housing.

この場合、略Ｕ字型の第３のヒートパイプ１３及び略Ｌ字型の第４のヒートパイプ１４をスプレッダ１に熱接続したので、スプレッダ１による放熱効率が向上し、白色ＬＥＤ５の一層の均熱化が図れる。   In this case, since the substantially U-shaped third heat pipe 13 and the substantially L-shaped fourth heat pipe 14 are thermally connected to the spreader 1, the heat dissipation efficiency by the spreader 1 is improved, and the white LED 5 is more uniform. Heating can be achieved.

また本実施例は、第３乃至第４のヒートパイプ１３,１４のそれぞれの一辺として基端部２０及び第１の他側辺部２５の一面としての第２の一側平坦面２１及び第３の一側平坦面２６がスプレッダ１に熱接続されるとともに、第３乃至第４のヒートパイプ１３,１４における、それぞれ少なくとも一対のアーム部１７及び第１の一側辺部２３を含む第２の一側平坦面２１及び第３の一側平坦面２６との反対側である第２の他側平坦面２２及び第３の他側平坦面２７の全面が放熱板１０に熱接続されている。 The present embodiment, third to each of the base end portion 20 as one side and the first of the second one side flat surface 21 and the third as one surface of the other side portion 25 of the fourth heat pipe 13, 14 The second flat surface 26 is thermally connected to the spreader 1 and includes at least a pair of arm portions 17 and a first one side portion 23 in the third to fourth heat pipes 13 and 14. The entire surfaces of the second other flat surface 22 and the third other flat surface 27 opposite to the one side flat surface 21 and the third one side flat surface 26 are thermally connected to the heat sink 10.

この場合、第３乃至第４のヒートパイプ１３,１４のそれぞれの片側全面である第２乃至第３の他側平坦面２２,２７全面から放熱板１０を介して機器等の筐体に放熱できるため、更に白色ＬＥＤ５の均熱化と温度上昇の抑制が図れる。   In this case, heat can be radiated from the entire surfaces of the second to third other flat surfaces 22 and 27, which are the entire surfaces on one side of the third to fourth heat pipes 13 and 14, to the housing of the device or the like via the heat radiating plate 10. For this reason, the white LED 5 can be uniformly heated and the temperature rise can be suppressed.

なお、本発明は上記実施例に限定されるものではなく、本発明の趣旨を逸脱しない範囲で変更可能である。例えば、本発明の冷却ユニットによって冷却される発熱する電子部品としては、白色ＬＥＤ５に限られるものではなく、適宜変更可能である。また、熱接続についても半田付けやサーモグリス以外に、接触により熱交換を可能にするものであれば特に限定されるものではなく、適宜変更可能である。さらに、スプレッダ１の断面形状についても、略Ｌ字型に限定されるものではなく、Ｌ字型以外の断面多角形型であってもよい。この場合、スプレッダ１の断面形状を多角形型とすることで、第１のヒートパイプ８との接触箇所が増えることによる熱接続面積の増加によって、白色ＬＥＤ５の均熱化がさらに効率よく行われることとなる。また、第１のヒートパイプ８の断面形状についても円筒形に限られるものではなく適宜変更が可能であり、扁平型とした場合には、スプレッダ１との接触面積が増えることにより、白色ＬＥＤ５の均熱化がさらに効率よく行われることとなる。   In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention. For example, the electronic component that generates heat and is cooled by the cooling unit of the present invention is not limited to the white LED 5 and can be appropriately changed. Further, the thermal connection is not particularly limited as long as it enables heat exchange by contact other than soldering or thermo-grid, and can be changed as appropriate. Furthermore, the cross-sectional shape of the spreader 1 is not limited to a substantially L shape, and may be a polygonal cross section other than the L shape. In this case, by setting the cross-sectional shape of the spreader 1 to a polygonal shape, the white LED 5 is more efficiently heated by increasing the heat connection area due to the increase in the number of contact points with the first heat pipe 8. It will be. Further, the cross-sectional shape of the first heat pipe 8 is not limited to the cylindrical shape, and can be changed as appropriate. When the flat shape is adopted, the contact area with the spreader 1 increases, so that the white LED 5 Soaking is performed more efficiently.

本発明の第１実施例の冷却ユニットの外観斜視図である。It is an external appearance perspective view of the cooling unit of 1st Example of this invention. 同上、冷却ユニットの装着例を示す外観斜視図である。It is an external appearance perspective view which shows the example of attachment of a cooling unit same as the above. 同上、冷却ユニットの装着例において要部を拡大した外観斜視図である。It is the external appearance perspective view which expanded the principal part in the mounting example of a cooling unit same as the above. 同上、冷却ユニットの断面図である。It is sectional drawing of a cooling unit same as the above. 同上、スプレッダにＬＥＤを装着した例を示す外観斜視図である。It is an external appearance perspective view which shows the example which mounted LED on the spreader same as the above.

１ スプレッダ（熱伝導部材）
４ 第１の外面
５ 白色ＬＥＤ（発光素子）
６ 第１の内面
７ 第２の内面
８ 第１のヒートパイプ
１０ 放熱板（放熱体）
１２ 第２のヒートパイプ
１３ 第３のヒートパイプ
１４ 第４のヒートパイプ
１７ 一対のアーム部
２０ 基端部
２１ 第２の一側平坦面
２２ 第２の他側平坦面
２３ 第１の一側辺部
２５ 第１の他側辺部
２６ 第３の一側平坦面
２７ 第３の他側平坦面 1 Spreader (heat conduction member)
4 First outer surface 5 White LED (light emitting element)
6 1st inner surface 7 2nd inner surface 8 1st heat pipe 10 Heat sink (heat radiator)
12 2nd heat pipe 13 3rd heat pipe 14 4th heat pipe 17 A pair of arm part 20 Base end part 21 2nd one side flat surface 22 2nd other side flat surface 23 1st one side edge Part 25 First other side part 26 Third one side flat surface 27 Third other side flat surface

Claims (2)

複数の発光素子を冷却する冷却ユニットであって、前記複数の発光素子を均熱化するヒートパイプを備え、断面略Ｌ字型に形成されて、外側の一面に前記複数の発光素子を装着し、内側の二面に前記ヒートパイプを熱接続した熱伝導部材を備えたことを特徴とする冷却ユニット。 A cooling unit for cooling the light emitting device of multiple, comprising a heat pipe for temperature control of said plurality of light emitting elements, are formed in a substantially L-shaped, mounting the plurality of light emitting elements on one surface of the outer A cooling unit comprising a heat conducting member thermally connecting the heat pipes on two inner surfaces . 前記熱伝導部材を金属材料から形成するとともに、前記ヒートパイプを断面略円筒型又は略扁平型としたことを特徴とする請求項１記載の冷却ユニット。 And forming the heat conductive member from a metal material, the cooling unit according to claim 1 Symbol mounting, characterized in that the heat pipe has a cross section cylindrical or substantially flat.
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