JP6798137B2 - Light source unit - Google Patents
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- JP6798137B2 JP6798137B2 JP2016091867A JP2016091867A JP6798137B2 JP 6798137 B2 JP6798137 B2 JP 6798137B2 JP 2016091867 A JP2016091867 A JP 2016091867A JP 2016091867 A JP2016091867 A JP 2016091867A JP 6798137 B2 JP6798137 B2 JP 6798137B2
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- 239000007788 liquid Substances 0.000 claims description 97
- 239000003507 refrigerant Substances 0.000 claims description 97
- 239000000758 substrate Substances 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 25
- 230000003287 optical effect Effects 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
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Description
本発明は、光源ユニットに関する。 The present invention relates to a light source unit.
発光素子を光源に備えた光源ユニットにおいて、発光素子を冷却する各種の技術が知られている。例えば、冷却水によって冷却される冷却ユニットを光源ユニットの背面に設ける技術が知られている（例えば、特許文献１参照）。また例えば、基板の表面側を冷却するために、発光素子の光出射面を通る流路が設けられた技術が知られている（例えば、特許文献２参照）。 In a light source unit provided with a light emitting element as a light source, various techniques for cooling the light emitting element are known. For example, a technique is known in which a cooling unit cooled by cooling water is provided on the back surface of the light source unit (see, for example, Patent Document 1). Further, for example, there is known a technique in which a flow path is provided through a light emitting surface of a light emitting element in order to cool the surface side of the substrate (see, for example, Patent Document 2).
しかしながら、特許文献２の技術では、発光素子を冷却できるものの流路の構成が複雑であり、光源ユニットの高コスト化を招く、という問題がある。
そこで本発明は、より簡単な構成で発光素子を冷却できる光源ユニットを提供することを目的とする。
However, in the technique of Patent Document 2, although the light emitting element can be cooled, there is a problem that the structure of the flow path is complicated and the cost of the light source unit is increased.
Therefore, an object of the present invention is to provide a light source unit capable of cooling a light emitting element with a simpler configuration.
本発明は、発光素子と、前記発光素子を覆うレンズと、前記発光素子が実装された基板と、を備え、前記レンズには、前記基板上の発光素子が収まる凹部が形成され、液体の冷媒が流れる液冷媒流路が前記凹部と前記レンズの出射面との間に設けられており、前記液冷媒流路における前記レンズの出射面側の面及び前記発光素子側の面の双方が平面に形成されていることを特徴とする光源ユニットである。
本発明は、発光素子と、前記発光素子を覆うレンズと、前記発光素子が実装された基板と、を備え、前記レンズには、前記発光素子の光軸を外れた箇所に、液体の冷媒が流れる複数の液冷媒流路が設けられ、前記基板には、前記発光素子を収める凹部が設けられている、ことを特徴とする光源ユニットである。
The present invention includes a light emitting element, a lens covering the light emitting element, and a substrate on which the light emitting element is mounted. The lens is formed with a recess in which the light emitting element on the substrate is accommodated, and is a liquid refrigerant. A liquid refrigerant flow path through which the lens flows is provided between the recess and the exit surface of the lens, and both the surface on the exit surface side of the lens and the surface on the light emitting element side of the liquid refrigerant flow path are flat. It is a light source unit characterized by being formed.
The present invention includes a light emitting element, a lens covering the light emitting element, and a substrate on which the light emitting element is mounted. The lens has a liquid refrigerant at a position off the optical axis of the light emitting element. The light source unit is characterized in that a plurality of flowing liquid refrigerant flow paths are provided, and the substrate is provided with a recess for accommodating the light emitting element.
また本発明は、上記光源ユニットにおいて、前記発光素子が収められる凹部を有し、前記凹部と前記発光素子の間には、熱伝導性材が充填されている、ことを特徴とする。 The present invention, in the above-mentioned light source unit has a recess which pre Symbol emitting element is accommodated, between the recess and the light emitting element, the thermally conductive material is filled, characterized in that.
また本発明は、上記光源ユニットにおいて、前記レンズは、前記基板の表面に面接触する接触面を有する、ことを特徴とする。 The present invention, in the above-mentioned light source unit, before Symbol lens has a contact surface that comes in surface contact with a surface of said substrate, characterized in that.
また本発明は、上記光源ユニットにおいて、前記基板の裏面の側を冷却する冷却ユニットを備える、ことを特徴とする。 Further, the present invention is characterized in that the light source unit includes a cooling unit that cools the back surface side of the substrate.
本発明では、液体の冷媒が流れる液冷媒流路がレンズに設けられているので、簡単な構成でありながらも効率良く発光素子を冷却できる。 In the present invention, since the lens is provided with a liquid refrigerant flow path through which the liquid refrigerant flows, the light emitting element can be efficiently cooled even with a simple configuration.
以下、図面を参照して本発明の実施形態について説明する。
図１は本実施形態に係る光源ユニット１の斜視図である。図２は光源ユニット１の構成を示す図であり、図２（Ａ）は光源ユニット１の平面図、図２（Ｂ）は光源ユニット１の正面図、図２（Ｃ）は光源ユニット１の底面図、図２（Ｄ）は光源ユニット１の右側面図、図２（Ｅ）は光源ユニット１の左側面図である。また図３は図２（Ｂ）のＩＩＩ−ＩＩＩ断面線で切った断面をみた断面視図である。また図４は図２（Ａ）のＩＶ−ＩＶ断面線で切った断面をみた断面視図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the light source unit 1 according to the present embodiment. 2A and 2B are views showing the configuration of the light source unit 1, FIG. 2A is a plan view of the light source unit 1, FIG. 2B is a front view of the light source unit 1, and FIG. 2C is a light source unit 1. A bottom view, FIG. 2D is a right side view of the light source unit 1, and FIG. 2E is a left side view of the light source unit 1. Further, FIG. 3 is a cross-sectional view showing a cross section cut along the III-III cross-sectional line of FIG. 2 (B). Further, FIG. 4 is a cross-sectional view showing a cross section cut along the IV-IV cross-sectional line of FIG. 2 (A).
光源ユニット１は、各種の照明器具や照明装置に光源として内蔵されるユニットであり、ＬＥＤ２（図３、図４）と、基板４と、レンズ体６と、背面冷却ユニット８と、配管部１０と、を備えている。
ＬＥＤ２は、発光素子の一態様である。ＬＥＤ２には、光源ユニット１の仕様等を満たす特性を有した素子が用いられ、この光源ユニット１では紫外線を放射する素子がＬＥＤ２に用いられている。基板４は、その表面４Ａ（図３、図４）にＬＥＤ２が実装された実装基板である。基板４は一方向に延びた平面視矩形状であり、基板４が延びる方向（長手方向）に複数のＬＥＤ２が適宜の間隔で実装されている。なお、基板４の長手方向に直交する短手方向にもＬＥＤ２が実装されてもよい。
The light source unit 1 is a unit incorporated as a light source in various lighting fixtures and lighting devices, and includes an LED 2 (FIGS. 3 and 4), a substrate 4, a lens body 6, a rear cooling unit 8, and a piping unit 10. And have.
LED2 is one aspect of a light emitting element. An element having a characteristic satisfying the specifications of the light source unit 1 and the like is used for the LED 2, and an element that radiates ultraviolet rays is used for the LED 2 in the light source unit 1. The substrate 4 is a mounting substrate on which the LED 2 is mounted on the surface 4A (FIGS. 3 and 4). The substrate 4 has a rectangular shape in a plan view extending in one direction, and a plurality of LEDs 2 are mounted at appropriate intervals in the direction in which the substrate 4 extends (longitudinal direction). The LED 2 may also be mounted in the lateral direction orthogonal to the longitudinal direction of the substrate 4.
レンズ体６は、ＬＥＤ２の光を制御する透過型の光学素子であり、ＬＥＤ２の光を透過する材料（例えば樹脂や石英ガラス）によって形成されており、ＬＥＤ２の光を制御するレンズ部１２と、基板４に固定される固定片１４とを一体に備える。
レンズ部１２は、基板４の表面４Ａに配列された各ＬＥＤ２を覆う大きさを有しつつ、所望の配光に応じた形状を有する。本実施形態では、レンズ部１２は、列状に配列されたＬＥＤ２に沿って延び、円筒面状の出射面１２Ａを有した、いわゆるシリンドリカルレンズであり、ＬＥＤ２の各々の光を所定の焦点に集光し、細いライン状の光を形成する。
固定片１４は、図３に示すように、基板４の表面４Ａに面接触する接触面１４Ａを有した部材であり、レンズ部１２の縁部の両側に一体に設けられている。固定片１４がネジ１６によって基板４にネジ止めされることで、レンズ体６が基板４に固定される。
The lens body 6 is a transmissive optical element that controls the light of the LED 2, is formed of a material (for example, resin or quartz glass) that transmits the light of the LED 2, and has a lens unit 12 that controls the light of the LED 2. A fixing piece 14 fixed to the substrate 4 is integrally provided.
The lens unit 12 has a size corresponding to a desired light distribution while having a size covering each LED 2 arranged on the surface 4A of the substrate 4. In the present embodiment, the lens unit 12 is a so-called cylindrical lens extending along the LEDs 2 arranged in a row and having a cylindrical exit surface 12A, and collects the light of each LED 2 at a predetermined focal point. It shines and forms a thin line of light.
As shown in FIG. 3, the fixing piece 14 is a member having a contact surface 14A that comes into surface contact with the surface 4A of the substrate 4, and is integrally provided on both sides of the edge portion of the lens portion 12. The lens body 6 is fixed to the substrate 4 by screwing the fixing piece 14 to the substrate 4 with the screws 16.
さらに、このレンズ体６がＬＥＤ２の熱を回収する機能を備えている。
具体的には、図３、及び図４に示すように、レンズ体６にはレンズ内液冷媒流路２０が形成されており、このレンズ内液冷媒流路２０に液体の冷媒（以下、「液冷媒」という）が流れることで、ＬＥＤ２の熱が液冷媒によって回収される。
本実施形態では、レンズ内液冷媒流路２０は、図３に示すようにＬＥＤ２の発光面２Ａと対向する位置（すなわち光軸Ｋと交差する位置）に設けられ、かつ、図４に示すようにＬＥＤ２の各々を経由するように延びた流路で形成されている。ＬＥＤ２の中で発熱が比較的大きな発光面２Ａに対向する位置にレンズ内液冷媒流路２０が設けられるので、ＬＥＤ２の発熱を効率良く液冷媒で回収できる。また、本実施形態のレンズ体６のように、レンズ体６（レンズ部１２）が光軸Ｋの方向に膨出する形状を成している場合には、厚みが大きな部位にレンズ内液冷媒流路２０が位置するので、レンズ内液冷媒流路２０を形成するための加工が容易になる。
Further, the lens body 6 has a function of recovering the heat of the LED 2.
Specifically, as shown in FIGS. 3 and 4, a liquid refrigerant flow path 20 in the lens is formed in the lens body 6, and a liquid refrigerant (hereinafter referred to as “)” is formed in the liquid refrigerant flow path 20 in the lens. The heat of the LED 2 is recovered by the liquid refrigerant due to the flow of the liquid refrigerant).
In the present embodiment, the liquid refrigerant flow path 20 in the lens is provided at a position facing the light emitting surface 2A of the LED 2 (that is, a position intersecting the optical axis K) as shown in FIG. 3, and as shown in FIG. It is formed by a flow path extending so as to pass through each of the LEDs 2. Since the liquid refrigerant flow path 20 in the lens is provided at a position in the LED 2 facing the light emitting surface 2A, which generates a relatively large amount of heat, the heat generated by the LED 2 can be efficiently recovered by the liquid refrigerant. Further, when the lens body 6 (lens portion 12) has a shape that bulges in the direction of the optical axis K as in the lens body 6 of the present embodiment, the liquid refrigerant in the lens is applied to a portion having a large thickness. Since the flow path 20 is located, processing for forming the liquid refrigerant flow path 20 in the lens becomes easy.
レンズ体６の長手方向の両端には、図４に示すように、入口管体２０Ａ、及び出口管体２０Ｂが形成されている。これら入口管体２０Ａ、及び出口管体２０Ｂは、レンズ内液冷媒流路２０への液冷媒の入口、及び出口となる部位であり、レンズ体６の外側に突出して延びる管状の部材によって形成されている。
入口管体２０Ａには、液冷媒を循環させるチラー５０が配管を介して接続され、チラー５０によって液冷媒がレンズ内液冷媒流路２０を流れることにより、ＬＥＤ２の各々の熱が液冷媒によって回収され、ＬＥＤ２が冷却されることとなる。チラー５０は、光源ユニット１を内蔵する照射装置に設けられている。
As shown in FIG. 4, an inlet tube body 20A and an outlet tube body 20B are formed at both ends of the lens body 6 in the longitudinal direction. The inlet tube body 20A and the outlet tube body 20B are portions that serve as inlets and outlets for the liquid refrigerant to the liquid refrigerant flow path 20 in the lens, and are formed by tubular members that project outward from the lens body 6. ing.
A chiller 50 that circulates the liquid refrigerant is connected to the inlet pipe body 20A via a pipe, and the liquid refrigerant flows through the liquid refrigerant flow path 20 in the lens by the chiller 50, so that the heat of each LED 2 is recovered by the liquid refrigerant. Then, the LED 2 is cooled. The chiller 50 is provided in an irradiation device having a built-in light source unit 1.
また、レンズ体６は、ＬＥＤ２の熱を効率良く回収するために、図３に示すように、レンズ部１２の入射面側に発光素子収容凹部２２が形成されている。発光素子収容凹部２２は、ＬＥＤ２が入り込む部位であり、本実施形態ではＬＥＤ２の配列に沿って延び、ＬＥＤ２の各々が入り込む１条の凹みによって形成されている。発光素子収容凹部２２とＬＥＤ２の間の隙間には、光透過性、及び熱伝導性を有する熱伝導性材２４（図４）が充填されており、この熱伝導性材２４を介してＬＥＤ２とレンズ体６とが熱的に接続される。これにより、ＬＥＤ２の各々の発熱がレンズ体６に効率良く伝えられ、レンズ内液冷媒流路２０を流れる液冷媒によって効率良く熱が回収されることとなる。 Further, in the lens body 6, in order to efficiently recover the heat of the LED 2, as shown in FIG. 3, a light emitting element accommodating recess 22 is formed on the incident surface side of the lens portion 12. The light emitting element accommodating recess 22 is a portion into which the LED 2 enters, and in the present embodiment, it extends along the arrangement of the LEDs 2 and is formed by a single recess into which each of the LEDs 2 enters. The gap between the light emitting element accommodating recess 22 and the LED 2 is filled with a heat conductive material 24 (FIG. 4) having light transmission and thermal conductivity, and the LED 2 and the LED 2 pass through the heat conductive material 24. The lens body 6 is thermally connected. As a result, the heat generated by each of the LEDs 2 is efficiently transmitted to the lens body 6, and the heat is efficiently recovered by the liquid refrigerant flowing through the liquid refrigerant flow path 20 in the lens.
またレンズ体６において、図３に示すように、固定片１４の接触面１４Ａは、発光素子収容凹部２２の開口端２２Ａに同一平面で繋がることで、レンズ体６の入射面の側の面の大部分が、発光素子収容凹部２２を除き、基板４の表面４Ａに面接触する。これにより、レンズ体６と基板４の表面４Ａとが比較的大きな面積で面接触し、ＬＥＤ２から基板４の表面４Ａに伝わった熱が効率良くレンズ体６の側に伝えられ、レンズ内液冷媒流路２０を流れる液冷媒によって効率良く回収される。 Further, in the lens body 6, as shown in FIG. 3, the contact surface 14A of the fixed piece 14 is connected to the opening end 22A of the light emitting element accommodating recess 22 in the same plane, so that the surface of the lens body 6 on the incident surface side is connected. Most of them come into surface contact with the surface 4A of the substrate 4, except for the light emitting element accommodating recess 22. As a result, the lens body 6 and the surface 4A of the substrate 4 come into surface contact with each other over a relatively large area, and the heat transferred from the LED 2 to the surface 4A of the substrate 4 is efficiently transferred to the lens body 6 side, and the liquid refrigerant in the lens is used. It is efficiently recovered by the liquid refrigerant flowing through the flow path 20.
なお、このレンズ体６において、ＬＥＤ２を収める発光素子収容凹部２２は、ＬＥＤ２の各々ごとに個別に設けられていてもよい。 In the lens body 6, the light emitting element accommodating recess 22 for accommodating the LED 2 may be individually provided for each of the LEDs 2.
ここで、光源ユニット１では、レンズ内液冷媒流路２０の光学特性（透過特性や屈折率分布など）を一定に維持するために、液冷媒には、少なくともレンズ体６から回収する熱によって蒸発（気化）せずに液体の状態を維持する特性の冷媒（例えば水）が用いられる。また、チラー５０は、レンズ内液冷媒流路２０の内部が液冷媒で充満し、空気層を生じさせない流量、流速で液冷媒を供給する。 Here, in the light source unit 1, in order to keep the optical characteristics (transmission characteristics, refractive index distribution, etc.) of the liquid refrigerant flow path 20 in the lens constant, the liquid refrigerant evaporates at least by the heat recovered from the lens body 6. A refrigerant (for example, water) having the property of maintaining a liquid state without (vaporization) is used. Further, in the chiller 50, the inside of the liquid refrigerant flow path 20 in the lens is filled with the liquid refrigerant, and the liquid refrigerant is supplied at a flow rate and a flow velocity that do not generate an air layer.
また、レンズ内液冷媒流路２０、及び入口管体２０Ａ、及び出口管体２０Ｂの断面形状、及び断面積は、所望の熱回収能力（冷却性能）、及び、レンズ内液冷媒流路２０における光学特性に応じて適宜に決定される。例えば、本実施形態のレンズ内液冷媒流路２０の断面形状は略矩形（図３）であり、入口管体２０Ａ、及び出口管体２０Ｂの断面形状は略円形である。さらにレンズ内液冷媒流路２０の断面積よりも入口管体２０Ａ、及び出口管体２０Ｂの断面積は小さく形成されている。 Further, the cross-sectional shape and cross-sectional area of the liquid refrigerant flow path 20 in the lens, the inlet tube body 20A, and the outlet tube body 20B are the desired heat recovery capacity (cooling performance) and the liquid refrigerant flow path 20 in the lens. It is appropriately determined according to the optical characteristics. For example, the cross-sectional shape of the liquid refrigerant flow path 20 in the lens of the present embodiment is substantially rectangular (FIG. 3), and the cross-sectional shapes of the inlet tube 20A and the outlet tube 20B are substantially circular. Further, the cross-sectional areas of the inlet tube 20A and the outlet tube 20B are formed smaller than the cross-sectional area of the liquid refrigerant flow path 20 in the lens.
さらに、この光源ユニット１は、より高い冷却性能を得るために基板４の裏面４Ｂ（図３、図４）を冷却する上記背面冷却ユニット８を備えている。
背面冷却ユニット８は、内部に液冷媒が流通する金属製のユニットであり、図１〜図４に示すように、プレート３０と、フレーム３２とを備えている。プレート３０は、基板４の裏面４Ｂに取り付けられ、当該裏面４Ｂの全面に面接触する板状の部材である。フレーム３２は、図３、図４に示すように、流路用溝３４が形成された四角柱状の部材である。
流路用溝３４はプレート３０によって閉塞され、これにより、背面冷却ユニット８の内部に、ＬＥＤ２の配列方向に延び背面側液冷媒流路３６が形成される。背面側液冷媒流路３６の両端のそれぞれには、金属製の蓋体３８が固定されている。蓋体３８には貫通孔３８Ａが開口する。これら貫通孔３８Ａを通じて背面側液冷媒流路３６に液冷媒が導入、及び導出される。
そして、背面側液冷媒流路３６に液冷媒が流れることで、基板４の裏面４Ｂの側の熱が液冷媒によって回収され冷却される。
Further, the light source unit 1 includes the back surface cooling unit 8 that cools the back surface 4B (FIGS. 3 and 4) of the substrate 4 in order to obtain higher cooling performance.
The rear cooling unit 8 is a metal unit through which a liquid refrigerant flows, and includes a plate 30 and a frame 32 as shown in FIGS. 1 to 4. The plate 30 is a plate-shaped member attached to the back surface 4B of the substrate 4 and in surface contact with the entire surface of the back surface 4B. As shown in FIGS. 3 and 4, the frame 32 is a square columnar member in which the flow path groove 34 is formed.
The flow path groove 34 is closed by the plate 30, whereby the back side liquid refrigerant flow path 36 extending in the arrangement direction of the LEDs 2 is formed inside the back surface cooling unit 8. A metal lid 38 is fixed to each of both ends of the back side liquid refrigerant flow path 36. A through hole 38A opens in the lid 38. The liquid refrigerant is introduced and led out to the back side liquid refrigerant flow path 36 through these through holes 38A.
Then, as the liquid refrigerant flows through the back side liquid refrigerant flow path 36, the heat on the back surface 4B side of the substrate 4 is recovered by the liquid refrigerant and cooled.
配管部１０は、レンズ体６のレンズ内液冷媒流路２０と、背面冷却ユニット８の背面側液冷媒流路３６と、を液冷媒が流通可能に接続する部材であり、継手部材４４と、チューブ４６と、を備える。
継手部材４４は、背面冷却ユニット８の片方の蓋体３８の貫通孔３８Ａに連結される。また、チューブ４６は、レンズ体６のレンズ内液冷媒流路２０の出口管体２０Ｂと、継手部材４４を接続する配管部材である。一方、背面冷却ユニット８の他方の蓋体３８の貫通孔３８Ａは、チラー５０に接続される。これにより、チラー５０からレンズ内液冷媒流路２０に導入された液冷媒は、レンズ内液冷媒流路２０の中を流れてＬＥＤ２の熱を回収する。そして液冷媒は、レンズ内液冷媒流路２０から配管部１０を通じて背面冷却ユニット８に導かれ、背面側液冷媒流路３６の中を流れて基板４の裏面４Ｂから熱を回収し、チラー５０に導出される。
The piping portion 10 is a member that connects the liquid refrigerant flow path 20 in the lens of the lens body 6 and the liquid refrigerant flow path 36 on the back side of the rear cooling unit 8 so that the liquid refrigerant can flow, and includes the joint member 44 and the joint member 44. A tube 46 is provided.
The joint member 44 is connected to the through hole 38A of one of the lids 38 of the back surface cooling unit 8. Further, the tube 46 is a piping member that connects the outlet tube body 20B of the liquid refrigerant flow path 20 in the lens of the lens body 6 and the joint member 44. On the other hand, the through hole 38A of the other lid 38 of the back cooling unit 8 is connected to the chiller 50. As a result, the liquid refrigerant introduced from the chiller 50 into the liquid refrigerant flow path 20 in the lens flows through the liquid refrigerant flow path 20 in the lens and recovers the heat of the LED 2. Then, the liquid refrigerant is guided from the liquid refrigerant flow path 20 in the lens to the back cooling unit 8 through the piping portion 10, flows through the back side liquid refrigerant flow path 36, recovers heat from the back surface 4B of the substrate 4, and recovers heat from the back surface 4B of the substrate 4, and the chiller 50. Derived to.
なお、複数の光源ユニット１が直列に配置される場合には、各光源ユニット１の入口管体２０Ａと出口管体２０Ｂとがチューブ４６で接続され、各光源ユニット１のレンズ内液冷媒流路２０が直列に接続される。同様に、各光源ユニット１の蓋体３８の貫通孔３８Ａの間が継手部材４４で接続され、各光源ユニット１の背面側液冷媒流路３６が直接に接続される。 When a plurality of light source units 1 are arranged in series, the inlet tube body 20A and the outlet tube body 20B of each light source unit 1 are connected by a tube 46, and the liquid refrigerant flow path in the lens of each light source unit 1 is connected. 20 are connected in series. Similarly, the through holes 38A of the lid 38 of each light source unit 1 are connected by a joint member 44, and the back side liquid refrigerant flow path 36 of each light source unit 1 is directly connected.
図５は本実施形態の光源ユニット１の温度分布のシミュレーション結果を示す図である。図６は比較構成に係る光源ユニット１００の温度分布のシミュレーション結果を示す図である。比較構成の光源ユニット１００は、光源ユニット１のレンズ体６に代えて、レンズ内液冷媒流路２０が設けられていないレンズ体１０６を備える点において、光源ユニット１と構成を異にし、その他の構成は同一である。 FIG. 5 is a diagram showing a simulation result of the temperature distribution of the light source unit 1 of the present embodiment. FIG. 6 is a diagram showing a simulation result of the temperature distribution of the light source unit 100 according to the comparative configuration. The light source unit 100 having a comparative configuration is different in configuration from the light source unit 1 in that it includes a lens body 106 in which the liquid refrigerant flow path 20 in the lens is not provided instead of the lens body 6 of the light source unit 1, and other components. The configuration is the same.
このシミュレーションでは、液冷媒には水が用いられ、その水量は１０リットル／ｍｉｎに固定されている。また、ＬＥＤ２の熱量は１００ワットであり、周囲温度等の初期温度は２５℃に設定されている。レンズ体６、基板４、及び背面冷却ユニット８の材質は、それぞれ石英ガラス、アルミニウム、及び銅である。 In this simulation, water is used as the liquid refrigerant, and the amount of water is fixed at 10 liters / min. The amount of heat of the LED 2 is 100 watts, and the initial temperature such as the ambient temperature is set to 25 ° C. The materials of the lens body 6, the substrate 4, and the back cooling unit 8 are quartz glass, aluminum, and copper, respectively.
図５、及び図６を比較すると、光源ユニット１では、レンズ体６の出射面１２Ａの頂点部に位置する測定点Ｐ１の上昇温度（初期温度２５℃からの上昇温度）が２５．３℃であるのに対し、比較構成に係る光源ユニット１００では、同一の測定点Ｐ１での上昇温度が３０．８℃に達した。したがって、光源ユニット１は光源ユニット１００に対しレンズ体６の温度上昇を９５％程改善できることが分かる。 Comparing FIGS. 5 and 6, in the light source unit 1, the rising temperature (rising temperature from the initial temperature 25 ° C.) of the measurement point P1 located at the apex of the exit surface 12A of the lens body 6 is 25.3 ° C. On the other hand, in the light source unit 100 according to the comparative configuration, the rising temperature at the same measurement point P1 reached 30.8 ° C. Therefore, it can be seen that the light source unit 1 can improve the temperature rise of the lens body 6 by about 95% with respect to the light source unit 100.
また、ＬＥＤ２の発光面に設定された測定点Ｐ２の上昇温度を比較すると、光源ユニット１では上昇温度が３１．６℃であるのに対し、比較構成に係る光源ユニット１００では上昇温度が３３．４℃であった。これにより、本実施形態の光源ユニット１では測定点Ｐ２の温度上昇に抑えられており、光源ユニット１は、光源ユニット１００に対しのＬＥＤ２の温度上昇を２１％程改善できることが分かる。 Further, when comparing the rising temperature of the measurement point P2 set on the light emitting surface of the LED 2, the rising temperature of the light source unit 1 is 31.6 ° C., whereas the rising temperature of the light source unit 100 according to the comparative configuration is 33. It was 4 ° C. As a result, it can be seen that the light source unit 1 of the present embodiment is suppressed by the temperature rise of the measurement point P2, and the light source unit 1 can improve the temperature rise of the LED 2 with respect to the light source unit 100 by about 21%.
以上説明したように、本実施形態の光源ユニット１では、液冷媒が流れるレンズ内液冷媒流路２０がレンズ体６に設けられているので、簡単な構成でありながらも効率良くＬＥＤ２を冷却できる。 As described above, in the light source unit 1 of the present embodiment, since the liquid refrigerant flow path 20 in the lens through which the liquid refrigerant flows is provided in the lens body 6, the LED 2 can be efficiently cooled even with a simple configuration. ..
また本実施形態の光源ユニット１では、レンズ体６は、ＬＥＤ２が収められる発光素子収容凹部２２を有し、発光素子収容凹部２２とＬＥＤ２の間には、熱伝導性材２４が充填されている。これにより、ＬＥＤ２からレンズ体６への熱伝導が良好となり、レンズ内液冷媒流路２０を流れる液冷媒によって、より効率良くＬＥＤ２の熱を回収できる。 Further, in the light source unit 1 of the present embodiment, the lens body 6 has a light emitting element accommodating recess 22 in which the LED 2 is housed, and a heat conductive material 24 is filled between the light emitting element accommodating recess 22 and the LED 2. .. As a result, the heat conduction from the LED 2 to the lens body 6 becomes good, and the heat of the LED 2 can be recovered more efficiently by the liquid refrigerant flowing through the liquid refrigerant flow path 20 in the lens.
また本実施形態の光源ユニット１では、レンズ体６は、基板４の表面４Ａに面接触する接触面１４Ａを有する。これにより、ＬＥＤ２から基板４の表面４Ａに伝わった熱を、接触面１４Ａを通じてレンズ体６に効率良く伝えさせ、レンズ内液冷媒流路２０を流れる液冷媒によって回収し、当該基板４の表面４Ａの温度上昇も抑えられる。 Further, in the light source unit 1 of the present embodiment, the lens body 6 has a contact surface 14A that makes surface contact with the surface 4A of the substrate 4. As a result, the heat transferred from the LED 2 to the surface 4A of the substrate 4 is efficiently transferred to the lens body 6 through the contact surface 14A, recovered by the liquid refrigerant flowing through the liquid refrigerant flow path 20 in the lens, and the surface 4A of the substrate 4 The temperature rise of the lens is also suppressed.
また本実施形態の光源ユニット１では、レンズ内液冷媒流路２０は、ＬＥＤ２の発光面２Ａと対向する位置に設けられている。これにより、ＬＥＤ２の中で発熱が比較的大きな発光面２Ａに対向する位置にレンズ内液冷媒流路２０が設けられるので、ＬＥＤ２の発熱を効率良く液冷媒で回収できる。 Further, in the light source unit 1 of the present embodiment, the liquid refrigerant flow path 20 in the lens is provided at a position facing the light emitting surface 2A of the LED 2. As a result, the liquid refrigerant flow path 20 in the lens is provided at a position in the LED 2 facing the light emitting surface 2A, which generates a relatively large amount of heat, so that the heat generated by the LED 2 can be efficiently recovered by the liquid refrigerant.
また本実施形態の光源ユニット１では、基板４の裏面４Ｂの側を冷却する背面冷却ユニット８を備えるので、より高い冷却性能が得られる。 Further, since the light source unit 1 of the present embodiment includes the back surface cooling unit 8 for cooling the back surface 4B side of the substrate 4, higher cooling performance can be obtained.
なお、上述した実施形態は、あくまでも本発明の一態様を例示したものであって、本発明の趣旨を逸脱しない範囲で任意に変形、及び応用が可能である。 It should be noted that the above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.
上述した実施形態では、ＬＥＤ２の発光面２Ａと対向する位置にレンズ内液冷媒流路２０を設けた構成を例示した。しかしながら、レンズ内液冷媒流路２０の配置位置、及び数は、レンズ体６の中であれば、レンズ体６の形状や冷却性能に応じて適宜に設定できる。 In the above-described embodiment, the configuration in which the liquid refrigerant flow path 20 in the lens is provided at a position facing the light emitting surface 2A of the LED 2 is illustrated. However, the arrangement position and number of the liquid refrigerant flow paths 20 in the lens can be appropriately set according to the shape and cooling performance of the lens body 6 as long as it is inside the lens body 6.
上述した実施形態では、レンズ内液冷媒流路２０から背面側液冷媒流路３６に向かって液冷媒が流れる構成を例示した。しかしながら、液冷媒の流れの方向は、冷却性能に応じて適宜に変更されるものであり、背面側液冷媒流路３６からレンズ内液冷媒流路２０に向かって流れてもよい。また、チラー５０からレンズ内液冷媒流路２０、及び背面側液冷媒流路３６のそれぞれに並列に液冷媒を流してもよい。 In the above-described embodiment, the configuration in which the liquid refrigerant flows from the liquid refrigerant flow path 20 in the lens toward the liquid refrigerant flow path 36 on the back side is illustrated. However, the direction of the flow of the liquid refrigerant is appropriately changed according to the cooling performance, and may flow from the back side liquid refrigerant flow path 36 toward the liquid refrigerant flow path 20 in the lens. Further, the liquid refrigerant may flow from the chiller 50 in parallel to each of the liquid refrigerant flow path 20 in the lens and the liquid refrigerant flow path 36 on the back surface side.
上述した実施形態では、レンズ体６のレンズ内液冷媒流路２０と背面冷却ユニット８の背面側液冷媒流路３６との間の液冷媒の流路が、レンズ体６に突設した出口管体２０Ｂと、背面冷却ユニット８に設けた継手部材４４とをチューブ４６で接続して構成されている。
しかしながら、レンズ内液冷媒流路２０の出口管体２０Ｂの側の端部、及び、背面側液冷媒流路３６の一端側の各々を塞ぎ、レンズ内液冷媒流路２０から基板４を貫通して背面側液冷媒流路３６に連通する流路によって、レンズ内液冷媒流路２０と背面側液冷媒流路３６とを接続してもよい。
In the above-described embodiment, the flow path of the liquid refrigerant between the liquid refrigerant flow path 20 in the lens of the lens body 6 and the liquid refrigerant flow path 36 on the back side of the rear cooling unit 8 is an outlet pipe projecting from the lens body 6. The body 20B and the joint member 44 provided on the rear cooling unit 8 are connected by a tube 46.
However, the end of the liquid refrigerant flow path 20 in the lens on the outlet tube side 20B and one end side of the liquid refrigerant flow path 36 on the back side are closed, and the liquid refrigerant flow path 20 in the lens penetrates the substrate 4. The in-lens liquid refrigerant flow path 20 and the back side liquid refrigerant flow path 36 may be connected by a flow path communicating with the back side liquid refrigerant flow path 36.
上述した実施形態では、発光素子収容凹部２２がレンズ体６に設けられる構成を例示した。しかしながら、図７に示すように、基板２０４の側に発光素子収容凹部２２２を設けた光源ユニット２００を構成してもよい。この光源ユニット２００のレンズ体２０６にあっては、レンズ内液冷媒流路２２０が、レンズ部１２のうち光軸Ｋ（発光面２Ａの中心軸）から外れた複数の箇所に設けられている。 In the above-described embodiment, the configuration in which the light emitting element accommodating recess 22 is provided in the lens body 6 is illustrated. However, as shown in FIG. 7, a light source unit 200 having a light emitting element accommodating recess 222 provided on the side of the substrate 204 may be configured. In the lens body 206 of the light source unit 200, the liquid refrigerant flow path 220 in the lens is provided at a plurality of locations in the lens portion 12 that are off the optical axis K (central axis of the light emitting surface 2A).
本発明に係る光源ユニットは、屋外／屋内における照明や、各種の光処理（例えば、光硬化処理や光配向処理、光殺菌処理など）のための照射装置といった任意の装置或いは器具の光源に広く用いることができる。 The light source unit according to the present invention is widely used as a light source for any device or instrument such as outdoor / indoor lighting and an irradiation device for various light treatments (for example, photocuring treatment, photoalignment treatment, photosterilization treatment, etc.). Can be used.
１、２００ 光源ユニット
２ ＬＥＤ（発光素子）
４、２０４ 基板
４Ａ 表面
４Ｂ 裏面
６、２０６ レンズ体（レンズ）
８ 背面冷却ユニット
１０ 配管部
１２ レンズ部
１４ 固定片
１４Ａ 接触面
２０、２２０ レンズ内液冷媒流路（液冷媒流路）
２２、２２２ 発光素子収容凹部（凹部）
２４ 熱伝導性材
３６ 背面側液冷媒流路
５０ チラー
Ｋ 光軸
1,200 Light source unit 2 LED (light emitting element)
4,204 Substrate 4A Front side 4B Back side 6,206 Lens body (lens)
8 Rear cooling unit 10 Piping part 12 Lens part 14 Fixed piece 14A Contact surface 20, 220 Liquid refrigerant flow path in the lens (liquid refrigerant flow path)
22, 222 Light emitting element accommodating recess (recess)
24 Thermal conductive material 36 Back side liquid refrigerant flow path 50 Chiller K Optical axis
Claims (5)
前記発光素子を覆うレンズと、
前記発光素子が実装された基板と、を備え、
前記レンズには、
前記基板上の発光素子が収まる凹部が形成され、液体の冷媒が流れる液冷媒流路が前記凹部と前記レンズの出射面との間に設けられており、
前記液冷媒流路における前記レンズの出射面側の面及び前記発光素子側の面の双方が平面に形成されている、
ことを特徴とする光源ユニット。 Light emitting element and
The lens that covers the light emitting element and
A substrate on which the light emitting element is mounted is provided.
The lens has
A recess for accommodating the light emitting element on the substrate is formed, and a liquid refrigerant flow path through which the liquid refrigerant flows is provided between the recess and the exit surface of the lens.
Both the exit surface side surface of the lens and the light emitting element side surface of the liquid refrigerant flow path are formed in a flat surface .
A light source unit characterized by that.
前記発光素子を覆うレンズと、
前記発光素子が実装された基板と、を備え、
前記レンズには、前記発光素子の光軸を外れた箇所に、液体の冷媒が流れる複数の液冷媒流路が設けられ、
前記基板には、前記発光素子を収める凹部が設けられている、
ことを特徴とする光源ユニット。 Light emitting element and
The lens that covers the light emitting element and
A substrate on which the light emitting element is mounted is provided.
The lens is provided with a plurality of liquid refrigerant flow paths through which liquid refrigerant flows at locations off the optical axis of the light emitting element.
The substrate is provided with a recess for accommodating the light emitting element.
A light source unit characterized by that.
ことを特徴とする請求項１または２に記載の光源ユニット。 A thermal conductive material is filled between the recess and the light emitting element.
The light source unit according to claim 1 or 2.
ことを特徴とする請求項１〜３のいずれかに記載の光源ユニット。 The lens has a contact surface that makes surface contact with the surface of the substrate.
The light source unit according to any one of claims 1 to 3.
ことを特徴とする請求項１〜４のいずれかに記載の光源ユニット。 A cooling unit for cooling the back surface side of the substrate is provided.
The light source unit according to any one of claims 1 to 4.
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