JP2007035380A - Lighting equipment - Google Patents

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JP2007035380A
JP2007035380A JP2005215070A JP2005215070A JP2007035380A JP 2007035380 A JP2007035380 A JP 2007035380A JP 2005215070 A JP2005215070 A JP 2005215070A JP 2005215070 A JP2005215070 A JP 2005215070A JP 2007035380 A JP2007035380 A JP 2007035380A
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housing
opening
led unit
lighting fixture
led
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JP2005215070A
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Minoru Maehara
稔 前原
Hiroo Kawaminami
博生 川南
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To effectively exhaust heat generated by an LED element in a lighting equipment provided with an LED unit implemented with the LED element and a housing storing the LED unit. <P>SOLUTION: The housing 3 is provided with a first opening 31 facing a light emitting surface of the LED unit 2, a side surface part 32 covering a side surface of the LED unit 2 and a back surface part 33 covering a back surface of the LED unit and a second opening part 34 is formed in the side surface part 32. Since an air flow passage connecting the first opening part 31 and the second opening part 34 are formed in a state with the LED unit 2 retained by the housing 3, the air is passed through this gap by convection. Thus heat dissipation in the LED unit 2 is improved and the heat produced by the LED element is efficiently exhausted outside the lighting equipment 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ＬＥＤ（Light Emitting Diode）素子を光源とする照明器具に関する。   The present invention relates to a lighting fixture using an LED (Light Emitting Diode) element as a light source.

この種の照明器具として、ＬＥＤ素子が実装されたＬＥＤ実装基板と、ＬＥＤ実装基板を収納する筐体とを備え、ダウンライト等として用いられる照明器具が知られている。なお、以下においては、ＬＥＤ実装基板とこれに付随する部材をモジュール化したものをＬＥＤユニットという。   As this type of lighting fixture, there is known a lighting fixture that includes an LED mounting board on which an LED element is mounted and a housing that houses the LED mounting board, and is used as a downlight or the like. In the following description, a module obtained by modularizing an LED mounting substrate and members attached thereto is referred to as an LED unit.

近年、このような照明器具においては、ＬＥＤ実装基板に実装するＬＥＤ素子の数を増やしたり、ＬＥＤ素子に供給する電流を増やしたりする等、高出力化する傾向にある。このため、ＬＥＤ素子からの発熱に起因する発光効率の低下や短寿命化を回避するために照明器具の放熱性の改善が重要な課題となっている。また、照明器具の放熱性が悪い場合、ＬＥＤ素子の短寿命化のみならず、ＬＥＤ素子を接続している半田や導電性樹脂の熱劣化、ＬＥＤ素子をシールしている封止樹脂の熱劣化等を引き起こす虞もある。特に、このような照明器具を、天井に設置されるダウンライトに用いた場合、筐体が天井裏に隠れてしまうため筐体内に熱がこもり易くなり、放熱性の改善が必須となる。   In recent years, such lighting fixtures tend to increase output, such as increasing the number of LED elements mounted on the LED mounting substrate or increasing the current supplied to the LED elements. For this reason, improvement of the heat dissipation of a lighting fixture is an important subject in order to avoid the fall of the luminous efficiency resulting from the heat_generation | fever from an LED element, and the lifetime reduction. Moreover, when the heat dissipation of the lighting fixture is poor, not only the life of the LED element is shortened, but also the thermal deterioration of the solder and conductive resin connecting the LED element, and the sealing resin sealing the LED element. There is also a risk of causing this. In particular, when such a lighting fixture is used for a downlight installed on a ceiling, the casing is hidden behind the ceiling, so that heat tends to be trapped in the casing, and improvement of heat dissipation is essential.

ところで、筐体の正面（ＬＥＤユニットの発光面に対向する面）と背面に開口部を備え、正面の開口部から背面の開口部まで繋がる空気流通路が形成されている照明器具が知られている（例えば、特許文献１参照）。このような照明器具においては、空気流通路を介して空気を流通させることにより、ＬＥＤ素子から発生した熱を照明器具の外部に排出することが可能である。
特開２００５−１０８５４４号公報（第７頁、図５） By the way, there is known a luminaire in which an opening is provided on the front surface (surface facing the light emitting surface of the LED unit) and the back surface of the housing, and an air flow passage is formed from the front opening portion to the back opening portion. (For example, refer to Patent Document 1). In such a luminaire, heat generated from the LED element can be discharged to the outside of the luminaire by circulating air through the air flow passage.
JP 2005-108544 A (page 7, FIG. 5)

しかしながら、筐体の背面に開口部を形成した場合、空気流通路における空気の流通を妨げないようにするために、ＬＥＤユニットの背面側に配置される部材の設置スペースや形状が制限される虞がある。例えば、ＬＥＤ実装基板上に実装されたＬＥＤ素子を光源とする場合、通常、ＬＥＤ実装基板の正面（発光面）側にのみ光を出射し、ＬＥＤ実装基板の背面側には光を出射しないため、ＬＥＤユニット（ＬＥＤ実装基板）の背面側に制御基板（電源基板）等を配置する場合があるが、このような部材の設置スペースや形状が制限される虞がある。   However, when the opening is formed on the back surface of the housing, the installation space and shape of the members arranged on the back side of the LED unit may be limited in order not to disturb the air flow in the air flow passage. There is. For example, when an LED element mounted on an LED mounting substrate is used as a light source, it normally emits light only on the front surface (light emitting surface) side of the LED mounting substrate and does not emit light on the back surface side of the LED mounting substrate. In some cases, a control board (power supply board) or the like is disposed on the back side of the LED unit (LED mounting board), but there is a possibility that the installation space and shape of such a member may be limited.

また、照明器具をダウンライトとして用いた場合、屋内の断熱性、遮音性等を向上させるために、照明器具を覆うように断熱材等が天井裏に施工される場合があるが、筐体の背面に開口部を設けた場合、開口部が断熱材等で塞がれ、空気流通経路を確保することができなくなる虞がある。   In addition, when a lighting fixture is used as a downlight, in order to improve indoor heat insulation, sound insulation, etc., a heat insulating material or the like may be constructed on the back of the ceiling to cover the lighting fixture. When the opening is provided on the back surface, the opening is blocked with a heat insulating material or the like, and there is a possibility that the air flow path cannot be secured.

本発明は、かかる点に鑑みてなされたものであり、ＬＥＤ素子で発生した熱を効率良く排出することができ、特に、ダウンライトとして用いる場合に好適な照明器具を提供することを目的とする。   This invention is made | formed in view of this point, and it aims at providing the lighting fixture suitable when using especially as a downlight which can discharge | emit efficiently the heat | fever which generate | occur | produced with the LED element. .

上記目的を達成するために請求項１の発明は、ＬＥＤ素子が実装されたＬＥＤユニットと、前記ＬＥＤユニットを収納すると共に保持する筐体とを備えた照明器具において、前記筐体は、前記ＬＥＤユニットの発光面に対向する第１の開口部と、前記ＬＥＤユニットの側面を覆う側面部と、前記ＬＥＤユニットの背面を覆う背面部とを有し、前記側面部には第２の開口部が形成され、前記ＬＥＤユニットは、その側面と前記側面部の内面との間に所定間隙をおいて保持されて、前記第１の開口部から前記第２の開口部まで繋がる空気流通路が形成されていることを特徴とする。   In order to achieve the above object, the invention of claim 1 is a lighting device comprising: an LED unit on which an LED element is mounted; and a housing for storing and holding the LED unit. A first opening facing the light emitting surface of the unit; a side surface covering the side surface of the LED unit; and a back surface covering the back surface of the LED unit. A second opening is formed on the side surface. The LED unit is formed and held with a predetermined gap between the side surface and the inner surface of the side surface portion, and an air flow passage is formed to connect from the first opening portion to the second opening portion. It is characterized by.

請求項２の発明は、請求項１に記載の照明器具において、前記筐体の側面部の内面には、内方に突出し、前記空気流通路を通る空気が内方に向かうように誘導する第１の突出部が形成されていることを特徴とする。   According to a second aspect of the present invention, in the lighting apparatus according to the first aspect, the inner surface of the side surface portion of the housing projects inwardly and guides the air passing through the air flow passage toward the inward direction. 1 protrusion part is formed, It is characterized by the above-mentioned.

請求項３の発明は、請求項１に記載の照明器具において、前記筐体の側面部の外面には、前記第２の開口部の周縁の一部から外方に突出し、前記筐体の内部から前記筐体の外部に向かう空気の流れを誘導する第２の突出部が形成されていることを特徴とする。   According to a third aspect of the present invention, in the lighting apparatus according to the first aspect, the outer surface of the side surface portion of the housing protrudes outward from a part of the peripheral edge of the second opening, and the interior of the housing A second protrusion that guides the flow of air from outside to the outside of the housing is formed.

請求項４の発明は、請求項１に記載の照明器具において、前記筐体の側面部の内面には、前記第１の開口部の近傍から前記第２の開口部の近傍まで延び、前記第１の開口部から前記第２の開口部に向かう空気の流れを誘導する第３の突出部が突出形成されていることを特徴とする。   According to a fourth aspect of the present invention, in the lighting fixture according to the first aspect, the inner surface of the side surface of the housing extends from the vicinity of the first opening to the vicinity of the second opening, and the first A third protrusion that guides the flow of air from one opening toward the second opening is formed to protrude.

請求項１に記載の照明器具によれば、ＬＥＤユニットが筐体に保持された状態で、第１の開口部から第２の開口部まで繋がる空気流通路が形成されているので、空気が対流によってこの隙間を流通する。このため、ＬＥＤユニットの放熱性が向上し、ＬＥＤ素子から発生した熱を効率良く排出することができる。   According to the lighting apparatus of claim 1, since the air flow passage that is connected from the first opening to the second opening is formed in a state in which the LED unit is held in the housing, air is convected. Circulates through this gap. For this reason, the heat dissipation of the LED unit is improved, and the heat generated from the LED element can be efficiently discharged.

また、筐体の側面部に第２の開口部が形成されているので、ＬＥＤユニットの背面側に配置される部材により空気流通路が塞がれることがない。このため、ＬＥＤユニットの背面側のスペースを有効に利用することができる。また、筐体の側面部に第２の開口部が形成されているので、照明器具を覆うように断熱材等が施工された場合であっても、空気流通路が確保される。このため、ダウンライトとして好適に使用することができる。   Moreover, since the 2nd opening part is formed in the side part of a housing | casing, an air flow path is not obstruct | occluded by the member arrange | positioned at the back side of an LED unit. For this reason, the space on the back side of the LED unit can be used effectively. Moreover, since the 2nd opening part is formed in the side part of a housing | casing, even if it is a case where a heat insulating material etc. are constructed so that a lighting fixture may be covered, an airflow path is ensured. For this reason, it can be suitably used as a downlight.

請求項２に記載の照明器具によれば、筐体の側面部の内面に、筐体の内方に向けて突出形成された第１の突出部を備え、この第１の突出部により空気流通路を通る空気が筐体の内方に向かうように誘導するようにしたので、ＬＥＤユニットの背面に沿って筐体の内方に向かう空気の流れによって、ＬＥＤユニットの中心付近から発生した熱を効率良く照明器具の外部に排出することができる。   According to the lighting apparatus of claim 2, the first protrusion is formed on the inner surface of the side surface of the casing so as to protrude inward of the casing, and air circulation is performed by the first protrusion. Since the air passing through the road is guided toward the inside of the housing, the heat generated from the vicinity of the center of the LED unit is caused by the flow of air toward the inside of the housing along the back surface of the LED unit. It can be efficiently discharged outside the lighting fixture.

請求項３に記載の照明器具によれば、筐体の側面部の外面に、第２の開口部の周縁の一部から筐体の外方に向けて突出形成された第２の突出部を備え、この第２の突出部により筐体の内部から筐体の外部に向かう空気の流れを誘導するようにしたので、第２の開口部において筐体の外部から筐体の内部に向かう空気の流れを効果的に防ぐことができ、筐体の内部から筐体の外部に向かう空気の流れによって、ＬＥＤ素子から発生した熱を効率良く照明器具の外部に排出することができる。   According to the lighting fixture of claim 3, the second protruding portion that is formed to protrude from a part of the peripheral edge of the second opening portion to the outside of the housing is formed on the outer surface of the side surface portion of the housing. And the second protrusion guides the flow of air from the inside of the housing to the outside of the housing, so that the air flowing from the outside of the housing to the inside of the housing at the second opening The flow can be effectively prevented, and the heat generated from the LED element can be efficiently discharged to the outside of the lighting fixture by the flow of air from the inside of the housing to the outside of the housing.

請求項４に記載の照明器具によれば、筐体の側面部の内面に、第１の開口部の近傍から第２の開口部の近傍まで延びる第３の突出部を突出形成し、この第３の突出部により第１の開口部から第２の開口部に向かう空気の流れを誘導するようにしたので、空気の流れを効率良く、第１の開口部から第２の開口部に導くことができ、ＬＥＤ素子から発生した熱を効率良く照明器具の外部に排出することができる。   According to the lighting fixture of the fourth aspect, the third protrusion extending from the vicinity of the first opening to the vicinity of the second opening is formed to protrude from the inner surface of the side surface of the housing. Since the air flow from the first opening to the second opening is guided by the three protrusions, the air flow is efficiently guided from the first opening to the second opening. The heat generated from the LED element can be efficiently discharged outside the lighting fixture.

以下、本発明の第１の実施形態について、ダウンライトとして用いられる照明器具を例にして説明する。図１に示されるように、照明器具１は、天井板１０に形成された取付孔等に取り付けられ、上方から床面等を照射するためのものであり、ＬＥＤ素子が実装されたＬＥＤユニット２と、ＬＥＤユニット２を収納すると共に保持する筐体３とを備えている。   Hereinafter, a first embodiment of the present invention will be described by taking a lighting fixture used as a downlight as an example. As shown in FIG. 1, a lighting fixture 1 is attached to a mounting hole or the like formed in a ceiling plate 10 and is used for irradiating a floor surface or the like from above, and an LED unit 2 on which an LED element is mounted. And a housing 3 for storing and holding the LED unit 2.

ＬＥＤユニット２は、複数のＬＥＤ素子を実装するＬＥＤ実装基板を備えている。また、ＬＥＤユニット２は、その側面から突出形成され、筐体３によって保持される一対の軸２１を備えている。筐体３は、ＬＥＤユニット２の発光面（図１において、ＬＥＤユニット２の下面）に対向する第１の開口部３１と、ＬＥＤユニット２の側面を覆う側面部３２と、ＬＥＤユニット２の背面を覆う背面部３３とを有している。側面部３２は略円筒状に形成されており、収納されたＬＥＤユニット２の背面より上方に、一対の第２の開口部３４が形成されている。また、筐体３は、側面部３２の下端部付近に、ＬＥＤユニット２の軸２１を保持する軸受３５を備えている。   The LED unit 2 includes an LED mounting board on which a plurality of LED elements are mounted. In addition, the LED unit 2 includes a pair of shafts 21 that are protruded from the side surface and held by the housing 3. The housing 3 includes a first opening 31 that faces the light emitting surface of the LED unit 2 (the lower surface of the LED unit 2 in FIG. 1), a side surface portion 32 that covers the side surface of the LED unit 2, and the back surface of the LED unit 2. And a back surface portion 33 for covering. The side surface portion 32 is formed in a substantially cylindrical shape, and a pair of second openings 34 are formed above the back surface of the stored LED unit 2. In addition, the housing 3 includes a bearing 35 that holds the shaft 21 of the LED unit 2 in the vicinity of the lower end portion of the side surface portion 32.

ＬＥＤユニット２は、軸２１が軸受３５で保持された状態で筐体３の内部に収納される。ＬＥＤユニット２は、筐体３に回転自在に保持されており、軸２１を中心に回転して照射方向が変更できるようになっている。また、ＬＥＤユニット２は、その側面と筐体３の側面部３２の内面との間に所定間隙をおいて筐体３に保持されており、照明器具１の内部には、第１の開口部３１から第２の開口部３４まで繋がる空気流通路が形成されている。より詳細には、ＬＥＤユニット２の外径及び高さは、少なくとも筐体３の内径及び高さよりもそれぞれ小さくなるように形成されており、ＬＥＤユニット２が筐体３に保持された状態で、第１の開口部３１から第２の開口部３４にかけて、ＬＥＤユニット２の周囲には隙間が形成される。   The LED unit 2 is housed inside the housing 3 with the shaft 21 held by the bearing 35. The LED unit 2 is rotatably held in the housing 3 and can rotate around the shaft 21 to change the irradiation direction. The LED unit 2 is held by the housing 3 with a predetermined gap between the side surface and the inner surface of the side surface portion 32 of the housing 3. An air flow passage that extends from 31 to the second opening 34 is formed. More specifically, the outer diameter and height of the LED unit 2 are formed to be at least smaller than the inner diameter and height of the housing 3, respectively, and the LED unit 2 is held by the housing 3. A gap is formed around the LED unit 2 from the first opening 31 to the second opening 34.

上述した第２の開口部３４は、軸２１及び軸受３５の上方に配置することが好ましい。ＬＥＤユニット２は、軸２１及び軸受３５を介して回転自在に筐体３に保持されており、ＬＥＤユニット２の発光面が、第１の開口部３１に対して所定角度を成すように傾けることが可能である。ＬＥＤユニット２の発光面が第１の開口部３１に対して所定角度を成すようにＬＥＤユニット２を傾けた際、軸２１付近の隙間に比べて、軸２１に対して垂直な水平方向Ａの隙間が広くなり、この広い方の隙間から筐体３の内部に空気が流入し易くなる。この隙間から筐体３の内部に流入した空気は、筐体３内で左右に広がって第２の開口部３４から排出されるため、第２の開口部３４を軸２１等の上方に配置することで空気流通路を長くすることができ、後に詳述する空気の流れによって照明器具１の放熱性を更に向上させることができる。なお、筐体３に用いられる材料や製造方法は、特に限定されるものではなく、例えば、プラスチック樹脂を用いて射出成形することにより筐体３を作成するようにしてもよい。   The second opening 34 described above is preferably disposed above the shaft 21 and the bearing 35. The LED unit 2 is rotatably held by the housing 3 via the shaft 21 and the bearing 35, and the light emitting surface of the LED unit 2 is inclined so as to form a predetermined angle with respect to the first opening 31. Is possible. When the LED unit 2 is tilted so that the light emitting surface of the LED unit 2 forms a predetermined angle with respect to the first opening 31, the horizontal direction A perpendicular to the shaft 21 is larger than the gap near the shaft 21. The gap becomes wider, and air easily flows into the housing 3 from the wider gap. The air flowing into the housing 3 from the gap spreads left and right within the housing 3 and is discharged from the second opening 34. Therefore, the second opening 34 is disposed above the shaft 21 and the like. Thus, the air flow passage can be lengthened, and the heat dissipation of the lighting fixture 1 can be further improved by the air flow described in detail later. In addition, the material used for the housing | casing 3 and a manufacturing method are not specifically limited, For example, you may make it produce the housing | casing 3 by injection molding using a plastic resin.

なお、ＬＥＤユニット２に電力を供給するための配線７は、例えば、図２に示されるように、ＬＥＤユニット２の背面の中央付近から引き出されて、筐体３の背面部３３に形成された孔を通って不図示の電源装置に接続される。   For example, as shown in FIG. 2, the wiring 7 for supplying power to the LED unit 2 is drawn from the vicinity of the center of the back surface of the LED unit 2 and formed on the back surface portion 33 of the housing 3. It is connected to a power supply device (not shown) through the hole.

照明器具１に電源供給されると、筐体３内のＬＥＤユニット２は点灯を開始する。点灯時間の経過に従って、ＬＥＤユニット２内のＬＥＤ素子は発光とともに発熱し、ＬＥＤ素子から発せられた熱は、筐体３内の空気中に輻射熱等によって放出される。   When power is supplied to the luminaire 1, the LED unit 2 in the housing 3 starts to light. As the lighting time elapses, the LED elements in the LED unit 2 generate heat with light emission, and the heat generated from the LED elements is released into the air in the housing 3 by radiant heat or the like.

また、ＬＥＤユニット２からの放熱によって、筐体３の内部と照明器具１の下方の空気との間に温度差が生じる。このため、図１、図３及び図４に示されるように、筐体３とＬＥＤユニット２の間に形成されている隙間において、第１の開口部３１から第２の開口部３４に向けて空気の対流が生じる。これによって、ＬＥＤユニット２から発せられた熱は、上方に流れて第２の開口部３４より照明器具１の外部に排出される。なお、図１、図３、図４、図６、図７及び図９においては、照明器具１における空気の流れを矢印Ｆで示している。   Further, due to heat radiation from the LED unit 2, a temperature difference is generated between the inside of the housing 3 and the air below the lighting fixture 1. Therefore, as shown in FIGS. 1, 3, and 4, in the gap formed between the housing 3 and the LED unit 2, from the first opening 31 toward the second opening 34. Air convection occurs. Thereby, the heat generated from the LED unit 2 flows upward and is discharged to the outside of the lighting fixture 1 through the second opening 34. In addition, in FIG.1, FIG.3, FIG.4, FIG.6, FIG.7 and FIG. 9, the flow of the air in the lighting fixture 1 is shown by the arrow F. FIG.

本実施形態の照明器具１によれば、ＬＥＤユニット２が筐体３に保持された状態で、第１の開口部３１から第２の開口部３４まで繋がる空気流通路が形成されているので、空気が対流によってこの隙間を流通する。このため、ＬＥＤユニット２の放熱性が向上し、ＬＥＤ素子から発生した熱を効率良く排出することができる。   According to the lighting fixture 1 of the present embodiment, since the LED unit 2 is held by the housing 3, an air flow passage that is connected from the first opening 31 to the second opening 34 is formed. Air flows through this gap by convection. For this reason, the heat dissipation of the LED unit 2 is improved, and the heat generated from the LED elements can be efficiently discharged.

また、筐体３の側面部３２に第２の開口部３４が形成されているので、ＬＥＤユニット２の背面側に配置される部材により空気流通路が塞がれることがない。このため、ＬＥＤユニット２の背面側のスペースを有効に利用することができる。   In addition, since the second opening 34 is formed in the side surface 32 of the housing 3, the air flow path is not blocked by a member disposed on the back side of the LED unit 2. For this reason, the space on the back side of the LED unit 2 can be used effectively.

また、筐体３の側面部３２に第２の開口部３４が形成されているので、図５に示されるように、照明器具１を覆うように断熱材１１等が施工された場合であっても、空気流通路が確保される。このため、ダウンライトとして好適に使用することができる。   In addition, since the second opening 34 is formed in the side surface 32 of the housing 3, as shown in FIG. 5, the heat insulating material 11 or the like is applied so as to cover the lighting fixture 1. Also, an air flow passage is secured. For this reason, it can be suitably used as a downlight.

次に、本発明の第２の実施形態に係る照明器具について図６を参照して説明する。本実施形態の照明器具１は、筐体３の側面部３２の内面に、筐体３の内方に向けて突出形成された第１の突出部４を備える点で第１の実施形態と異なり、他の構成は第１の実施形態と同様である。   Next, the lighting fixture which concerns on the 2nd Embodiment of this invention is demonstrated with reference to FIG. The lighting fixture 1 of this embodiment differs from 1st Embodiment by the point provided with the 1st protrusion part 4 formed in the inner surface of the side part 32 of the housing | casing 3 toward the inner side of the housing | casing 3. As shown in FIG. Other configurations are the same as those of the first embodiment.

第１の突出部４は、第１の開口部３１と第２の開口部３４の間に形成されており、側面部３２の内面に対して略垂直に、筐体の内方に向かって突出形成されている。なお、図６に示されるように、第１の突出部４を、側面部３２の内面の全周に亘って形成（すなわち、筐体３の正面側から見たときにリング状になるように形成）してもよく、側面部３２の内面の一部に形成（すなわち、筐体３の正面側から見たときにリングの一部が欠けるように形成）してもよい。   The first protrusion 4 is formed between the first opening 31 and the second opening 34, and protrudes inward of the housing substantially perpendicularly to the inner surface of the side surface 32. Is formed. As shown in FIG. 6, the first projecting portion 4 is formed over the entire inner surface of the side surface portion 32 (that is, when viewed from the front side of the housing 3, it becomes a ring shape). May be formed on a part of the inner surface of the side surface portion 32 (that is, formed so that a part of the ring is missing when viewed from the front side of the housing 3).

第１の開口部３１から流入した空気は、ＬＥＤユニット２から発せられた熱により、上方へ向かおうとするが、本実施形態の照明器具１では、第１の突出部４により、図６の矢印Ｆで示されるように筐体３の内方に向かうように誘導される。一般に、ＬＥＤユニット２の発熱量は、中心付近が最も大きくなるが、本実施形態の照明器具１によれば、第１の突出部４により第１の開口部３１から流入した空気は、ＬＥＤユニット２の背面に沿って、発熱量の大きいＬＥＤユニット２の中心付近に誘導された後、第２の開口部３４から排出される。   The air flowing in from the first opening 31 tends to move upward due to the heat generated from the LED unit 2, but in the lighting fixture 1 of the present embodiment, the first protrusion 4 causes the air in FIG. As indicated by the arrow F, it is guided toward the inside of the housing 3. In general, the amount of heat generated by the LED unit 2 is the largest near the center, but according to the lighting fixture 1 of the present embodiment, the air flowing from the first opening 31 by the first protrusion 4 is 2, after being guided to the vicinity of the center of the LED unit 2 having a large calorific value, the second opening 34 is discharged.

このように、本実施形態の照明器具１によれば、筐体３の側面部３２の内面に、筐体３の内方に向けて突出形成された第１の突出部４を備え、この第１の突出部４により空気流通路を通る空気が筐体３の内方に向かうように誘導するようにしたので、ＬＥＤユニット２の背面に沿って筐体３の内方に向かう空気の流れによって、ＬＥＤユニット２の中心付近から発生した熱を効率良く照明器具１の外部に排出することができる。   Thus, according to the luminaire 1 of the present embodiment, the inner surface of the side surface portion 32 of the housing 3 includes the first projecting portion 4 that is formed to project inward of the housing 3, and this first Since the first projecting portion 4 guides the air passing through the air flow path toward the inside of the housing 3, the air flows toward the inside of the housing 3 along the back surface of the LED unit 2. The heat generated from the vicinity of the center of the LED unit 2 can be efficiently discharged to the outside of the lighting fixture 1.

次に、本発明の第３の実施形態に係る照明器具について図７を参照して説明する。本実施形態に係る照明器具１は、筐体３の側面部３２の外面に、第２の開口部３４の周縁の一部から筐体３の外方に向けて突出形成された第２の突出部５を備える点で第１の実施形態と異なり、他の構成は第１の実施形態と同様である。   Next, the lighting fixture which concerns on the 3rd Embodiment of this invention is demonstrated with reference to FIG. The lighting fixture 1 according to the present embodiment has a second protrusion formed on the outer surface of the side surface portion 32 of the housing 3 so as to protrude from a part of the periphery of the second opening 34 toward the outside of the housing 3. Unlike the first embodiment in that the unit 5 is provided, other configurations are the same as those of the first embodiment.

第２の突出部５は、第２の開口部３４の下端部の周縁（第２の開口部の周縁の一部）から、斜め上方、且つ、筐体３の外方に向けて突出形成されている。第２の突出部５は、第２の開口部３４の上端部と略同じ高さまで延設されており、第２の突出部５の先端と第２の開口部３４の上端部の間には、所定間隔の隙間が形成されている。このように、第２の突出部５を形成することにより、対流によって下方から上方に向かう空気の流れを、筐体３の内部から筐体３の外部に向けて誘導することができる。   The second projecting portion 5 is formed so as to project obliquely upward and outward from the housing 3 from the periphery of the lower end of the second opening 34 (part of the periphery of the second opening). ing. The second projecting portion 5 extends to substantially the same height as the upper end portion of the second opening portion 34, and is between the tip end of the second projecting portion 5 and the upper end portion of the second opening portion 34. A gap having a predetermined interval is formed. In this way, by forming the second projecting portion 5, it is possible to guide the air flow from the bottom to the top by convection from the inside of the housing 3 to the outside of the housing 3.

本実施形態の照明器具１によれば、筐体３の側面部３２の外面に、第２の開口部３４の周縁の一部から筐体３の外方に向けて突出形成された第２の突出部５を備え、この第２の突出部５により筐体３の内部から筐体３の外部に向かう空気の流れを誘導するようにしたので、第２の開口部３４において筐体３の外部から筐体３の内部に向かう空気の流れを効果的に防ぐことができ、筐体３の内部から筐体３の外部に向かう空気の流れによって、ＬＥＤ素子から発生した熱を効率良く照明器具１の外部に排出することができる。   According to the luminaire 1 of the present embodiment, the second projection formed on the outer surface of the side surface portion 32 of the housing 3 from the part of the periphery of the second opening 34 toward the outside of the housing 3. Since the projecting portion 5 is provided and the second projecting portion 5 guides the flow of air from the inside of the housing 3 to the outside of the housing 3, the second opening portion 34 has the outside of the housing 3. It is possible to effectively prevent the flow of air from the inside of the housing 3 to the inside of the housing 3, and the heat generated from the LED elements is efficiently generated by the air flow from the inside of the housing 3 to the outside of the housing 3. Can be discharged outside.

次に、本発明の第４の実施形態に係る照明器具について図８及び図９を参照して説明する。本実施形態に係る照明器具１は、筐体３の側面部３２の内面に、第１の開口部３１の近傍から第２の開口部３４の近傍まで延びる第３の突出部６を突出形成した点で第１の実施形態と異なり、他の構成は第１の実施形態と同様である。   Next, the lighting fixture which concerns on the 4th Embodiment of this invention is demonstrated with reference to FIG.8 and FIG.9. In the luminaire 1 according to this embodiment, the third protrusion 6 extending from the vicinity of the first opening 31 to the vicinity of the second opening 34 is formed on the inner surface of the side surface 32 of the housing 3 so as to protrude. Unlike the first embodiment, the other configurations are the same as those of the first embodiment.

第３の突出部６は、第１の開口部３１と第２の開口部３４の間に形成されており、側面部３２の内面に対して略垂直に、筐体の内方に向かって突出形成されている。また、第３の突出部６は、側面部３２の内面の４箇所に形成されており、それぞれ板状に形成されている。これら第３の突出部６は、一対で第２の開口部３４を挟み込むように形成されており、これら一対の第３の突出部６の間隔は、第１の開口部３１側が広く、第２の開口部３４側が狭くなるように形成されている。第１の開口部３１から流入した空気は、対流によって筐体３の内部を上昇し、第３の突出部６によって第２の開口部３４付近に集められて第２の開口部３４から排出される。   The third protrusion 6 is formed between the first opening 31 and the second opening 34, and protrudes inward of the housing substantially perpendicularly to the inner surface of the side surface 32. Is formed. Moreover, the 3rd protrusion part 6 is formed in four places of the inner surface of the side part 32, and is each formed in plate shape. The third protrusions 6 are formed so as to sandwich the second opening 34 in a pair, and the distance between the pair of third protrusions 6 is wide on the first opening 31 side, The opening 34 side is formed to be narrow. The air flowing in from the first opening 31 rises inside the housing 3 by convection, is collected near the second opening 34 by the third protrusion 6, and is discharged from the second opening 34. The

本実施形態の照明器具１によれば、筐体３の側面部３２の内面に、第１の開口部３１の近傍から第２の開口部３４の近傍まで延びる第３の突出部６を突出形成し、この第３の突出部６により第１の開口部３１から第２の開口部３４に向かう空気の流れを誘導するようにしたので、空気の流れを効率良く、第１の開口部３１から第２の開口部３４に導くことができ、ＬＥＤ素子から発生した熱を効率良く照明器具１の外部に排出することができる。   According to the lighting fixture 1 of the present embodiment, the third protrusion 6 extending from the vicinity of the first opening 31 to the vicinity of the second opening 34 is formed on the inner surface of the side surface 32 of the housing 3 so as to protrude. Since the third protrusion 6 guides the air flow from the first opening 31 to the second opening 34, the air flow is efficiently transferred from the first opening 31. The heat can be guided to the second opening 34 and the heat generated from the LED element can be efficiently discharged to the outside of the lighting fixture 1.

次に、本発明の第５の実施形態に係る照明器具について図１０を参照して説明する。本実施形態に係る照明器具１は、第２の開口部３４が、筐体３の側面部３２の略全域に亘って、所定の割合（第２の開口部３４が形成されている部分と形成されていない部分の割合）で形成されている点で第１の実施形態と異なる。これら第２の開口部３４は、筐体３内の空気の流れがスムーズになるように、側面部３２の上下方向の配置及び周方向の配置が略均等になるように配置することが好ましい。本実施形態の照明器具１によれば、第２の開口部３４が、筐体３の側面部３２の略全域に亘って形成されているので、側面部３２の略全域からＬＥＤ素子から発生した熱を効率良く照明器具１の外部に排出することができる。   Next, the lighting fixture which concerns on the 5th Embodiment of this invention is demonstrated with reference to FIG. In the lighting fixture 1 according to the present embodiment, the second opening 34 is formed over a substantially entire area of the side surface 32 of the housing 3 with a predetermined ratio (the portion where the second opening 34 is formed). It is different from the first embodiment in that it is formed at a ratio of a portion not formed). These second openings 34 are preferably arranged so that the arrangement of the side parts 32 in the vertical direction and the arrangement in the circumferential direction are substantially equal so that the air flow in the housing 3 is smooth. According to the luminaire 1 of the present embodiment, the second opening 34 is formed over substantially the entire area of the side surface 32 of the housing 3, and thus is generated from the LED element from substantially the entire area of the side surface 32. Heat can be efficiently discharged to the outside of the lighting fixture 1.

なお、本発明は上記各種実施形態の構成に限られることなく種々の変形が可能である。例えば、照明器具１を、ダウンライト以外の照明器具として用いてもよい。   The present invention is not limited to the configurations of the various embodiments described above, and various modifications can be made. For example, you may use the lighting fixture 1 as lighting fixtures other than a downlight.

本発明の第１の実施形態に係る照明器具の斜視図。The perspective view of the lighting fixture which concerns on the 1st Embodiment of this invention. 同照明器具の配線の取付例を示す斜視図。The perspective view which shows the example of attachment of the wiring of the lighting fixture. 同照明器具のＡ−Ａ線断面図。AA line sectional view of the lighting fixture. 同照明器具のＢ−Ｂ線断面図。BB sectional drawing of the same lighting fixture. 同照明器具の施工例を示す断面図。Sectional drawing which shows the construction example of the lighting fixture. 本発明の第２の実施形態に係る照明器具の断面図。Sectional drawing of the lighting fixture which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施形態に係る照明器具の断面図。Sectional drawing of the lighting fixture which concerns on the 3rd Embodiment of this invention. 本発明の第４の実施形態に係る照明器具の斜視図。The perspective view of the lighting fixture which concerns on the 4th Embodiment of this invention. 同照明器具のＢ−Ｂ線断面図。BB sectional drawing of the same lighting fixture. 本発明の第５の実施形態に係る照明器具の断面図。Sectional drawing of the lighting fixture which concerns on the 5th Embodiment of this invention.

符号の説明Explanation of symbols

１ 照明器具
２ ＬＥＤユニット
３ 筐体
４ 第１の突出部
５ 第２の突出部
６ 第３の突出部
３１ 第１の開口部
３２ 側面部
３３ 背面部
３４ 第２の開口部 DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 LED unit 3 Housing | casing 4 1st protrusion part 5 2nd protrusion part 6 3rd protrusion part 31 1st opening part 32 Side surface part 33 Back surface part 34 2nd opening part

Claims (4)

ＬＥＤ素子が実装されたＬＥＤユニットと、前記ＬＥＤユニットを収納すると共に保持する筐体とを備えた照明器具であって、
前記筐体は、前記ＬＥＤユニットの発光面に対向する第１の開口部と、前記ＬＥＤユニットの側面を覆う側面部と、前記ＬＥＤユニットの背面を覆う背面部とを有し、
前記側面部には第２の開口部が形成され、
前記ＬＥＤユニットは、その側面と前記側面部の内面との間に所定間隙をおいて保持されて、前記第１の開口部から前記第２の開口部まで繋がる空気流通路が形成されていることを特徴とする照明器具。 A lighting fixture comprising an LED unit on which an LED element is mounted, and a housing for storing and holding the LED unit,
The housing includes a first opening facing the light emitting surface of the LED unit, a side surface covering the side surface of the LED unit, and a back surface covering the back surface of the LED unit.
A second opening is formed in the side part,
The LED unit is held with a predetermined gap between a side surface thereof and an inner surface of the side surface portion, and an air flow passage is formed to connect from the first opening portion to the second opening portion. Lighting equipment characterized by 前記筐体の側面部の内面には、内方に突出し、前記空気流通路を通る空気が内方に向かうように誘導する第１の突出部が形成されていることを特徴とする請求項１に記載の照明器具。   2. A first protrusion that protrudes inward and guides the air passing through the air flow passage inward is formed on an inner surface of the side surface of the housing. The lighting fixture as described in. 前記筐体の側面部の外面には、前記第２の開口部の周縁の一部から外方に突出し、前記筐体の内部から前記筐体の外部に向かう空気の流れを誘導する第２の突出部が形成されていることを特徴とする請求項１に記載の照明器具。   The outer surface of the side surface portion of the housing protrudes outward from a part of the periphery of the second opening, and induces a flow of air from the inside of the housing to the outside of the housing. The lighting device according to claim 1, wherein a protrusion is formed. 前記筐体の側面部の内面には、前記第１の開口部の近傍から前記第２の開口部の近傍まで延び、前記第１の開口部から前記第２の開口部に向かう空気の流れを誘導する第３の突出部が突出形成されていることを特徴とする請求項１に記載の照明器具。   On the inner surface of the side surface portion of the housing, air flows from the vicinity of the first opening to the vicinity of the second opening, and the air flow from the first opening toward the second opening The lighting fixture according to claim 1, wherein the third projecting portion to be guided is formed to project.
JP2005215070A 2005-07-25 2005-07-25 Lighting equipment Withdrawn JP2007035380A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009009709A (en) * 2007-06-26 2009-01-15 Noritz Corp Downlight
JP2009245867A (en) * 2008-03-31 2009-10-22 Stanley Electric Co Ltd Lighting system
JP2012129100A (en) * 2010-12-16 2012-07-05 Panasonic Corp Lighting fixture
KR101500977B1 (en) * 2007-05-04 2015-03-10 코닌클리케 필립스 엔.브이. Led-based fixtures and related methods for thermal management
US10539314B2 (en) 2011-09-12 2020-01-21 RAB Lighting Inc. Light fixture with airflow passage separating driver and emitter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101500977B1 (en) * 2007-05-04 2015-03-10 코닌클리케 필립스 엔.브이. Led-based fixtures and related methods for thermal management
JP2009009709A (en) * 2007-06-26 2009-01-15 Noritz Corp Downlight
JP2009245867A (en) * 2008-03-31 2009-10-22 Stanley Electric Co Ltd Lighting system
JP2012129100A (en) * 2010-12-16 2012-07-05 Panasonic Corp Lighting fixture
US10539314B2 (en) 2011-09-12 2020-01-21 RAB Lighting Inc. Light fixture with airflow passage separating driver and emitter
US11181261B2 (en) 2011-09-12 2021-11-23 RAB Lighting Inc. Light fixture with airflow passage separating driver and emitter

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