JP5975303B2 - LED lamp and heat sink used therefor - Google Patents

LED lamp and heat sink used therefor Download PDF

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JP5975303B2
JP5975303B2 JP2014037947A JP2014037947A JP5975303B2 JP 5975303 B2 JP5975303 B2 JP 5975303B2 JP 2014037947 A JP2014037947 A JP 2014037947A JP 2014037947 A JP2014037947 A JP 2014037947A JP 5975303 B2 JP5975303 B2 JP 5975303B2
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cylindrical portion
heat sink
hole
led lamp
cooling fan
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JP2015162413A (en
JP2015162413A5 (en
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匠史郎 杉尾
匠史郎 杉尾
晃三 丸田
晃三 丸田
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Iwasaki Denki KK
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Iwasaki Denki KK
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Priority to PCT/JP2015/053128 priority patent/WO2015129420A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/506—Cooling arrangements characterised by the adaptation for cooling of specific components of globes, bowls or cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F21V29/677—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Description

本発明は、ＬＥＤランプ及びそれに使用するヒートシンクに関し、特に、冷却ファンを備えた電球型のＬＥＤランプに関する。   The present invention relates to an LED lamp and a heat sink used therefor, and more particularly, to a bulb-type LED lamp provided with a cooling fan.

発光ダイオード（以下、ＬＥＤ：Light Emitting Diode）を光源とするＬＥＤランプが広く普及している。近年、ＬＥＤランプの用途の拡大に伴って、ＬＥＤランプの高出力化及び高電力化が求められている。ＬＥＤランプは、放電ランプと比較して高い発光効率を有する利点があるが、ＬＥＤが高温化すると、発光効率が低下する欠点がある。そこで、ＬＥＤの高温化を防止するために様々な手段が講じられている。例えば、ＬＥＤを冷却するための冷却ファンを設ける。   LED lamps using light emitting diodes (hereinafter referred to as LEDs) as light sources are widely used. In recent years, with the expansion of the use of LED lamps, there is a demand for higher output and higher power of LED lamps. The LED lamp has an advantage of having a high luminous efficiency as compared with the discharge lamp, but has a disadvantage that the luminous efficiency is lowered when the LED is heated to a high temperature. Therefore, various measures have been taken to prevent the LED from becoming hot. For example, a cooling fan for cooling the LED is provided.

特許文献１〜５には、電球型のＬＥＤランプの例が記載されている。これらのＬＥＤランプでは、ランプの中心軸線に垂直な円形の基板にＬＥＤ素子が装着されている。基板の背後には円形のヒートシンクが設けられている。冷却ファンは口金側に設けられている。   Patent Documents 1 to 5 describe examples of light bulb type LED lamps. In these LED lamps, LED elements are mounted on a circular substrate perpendicular to the central axis of the lamp. A circular heat sink is provided behind the substrate. The cooling fan is provided on the base side.

特許文献６には、ランプの中心軸線に平行な角柱型の基板にＬＥＤ素子が装着されたＬＥＤランプの例が記載されている。ガス流加速用ファンは口金とは反対側のトップ側に設けられている。   Patent Document 6 describes an example of an LED lamp in which an LED element is mounted on a prismatic substrate parallel to the central axis of the lamp. The gas flow accelerating fan is provided on the top side opposite to the base.

特開2007-265892号公報JP 2007-265892 A 特開2010-108774号公報JP 2010-108774 A 特開2012-190557号公報JP 2012-190557 A 特開2012-243525号公報JP 2012-243525 特開2013-065436号公報JP 2013-065436 JP 特開2012-156036号公報JP 2012-156036 特開2012-226960号公報JP 2012-226960 A 特開2013-020953号公報JP 2013-020953

冷却ファンの性能が低下すると、ＬＥＤが高温化し発光効率が低下する。冷却ファンの性能低下は、モータの潤滑油の劣化に起因する場合が多い。潤滑油の劣化は高温では加速される。特許文献７には、冷却ファンの信頼性を向上させるための手段として空気制御部を設けたＬＥＤ照明装置が記載されている。特許文献８にはバルーン型投光器の筒状放熱器の例が記載されている。   When the performance of the cooling fan is lowered, the temperature of the LED is increased and the light emission efficiency is lowered. In many cases, the performance deterioration of the cooling fan is caused by the deterioration of the lubricating oil of the motor. The deterioration of the lubricating oil is accelerated at high temperatures. Patent Document 7 describes an LED lighting device provided with an air control unit as means for improving the reliability of a cooling fan. Patent Document 8 describes an example of a cylindrical radiator of a balloon-type projector.

本発明の目的は、ＬＥＤの発光効率を向上させると同時に、冷却ファンによる冷却効果を高めることによって、高電力且つ高出力が可能な電球型のＬＥＤランプ及びそれに使用するヒートシンクを提供することにある。   An object of the present invention is to provide a bulb-type LED lamp capable of high power and high output by improving the luminous efficiency of the LED and at the same time enhancing the cooling effect by the cooling fan, and a heat sink used therefor. .

本発明の実施形態によると、ＬＥＤランプは、口金と、中心軸線に沿って延びる貫通孔を有する筒状のヒートシンクと、該ヒートシンクの側面に配置された基板と、該基板に装着されたＬＥＤ素子と、前記口金と前記ヒートシンクの間に配置された冷却ファンと、該冷却ファンを覆う筐体と、前記基板と前記ＬＥＤ素子を覆う透光性のカバーと、を有し、前記冷却ファンの中心軸線と前記ヒートシンクの中心軸線はランプの中心軸線に整合しており、
前記ヒートシンクは、同心状に配置された内側筒状部と外側筒状部を有し、前記内側筒状部の内側に中心貫通孔が形成され、前記内側筒状部と前記外側筒状部の間に管状貫通孔が形成されるように構成されている。 According to an embodiment of the present invention, an LED lamp includes a base, a cylindrical heat sink having a through hole extending along the central axis, a substrate disposed on a side surface of the heat sink, and an LED element mounted on the substrate. A cooling fan disposed between the base and the heat sink, a casing that covers the cooling fan, and a translucent cover that covers the substrate and the LED element, and the center of the cooling fan The axis and the central axis of the heat sink are aligned with the central axis of the lamp,
The heat sink has an inner cylindrical portion and an outer cylindrical portion arranged concentrically, a center through hole is formed inside the inner cylindrical portion, and the inner cylindrical portion and the outer cylindrical portion are formed. A tubular through hole is formed between them.

本実施形態によると前記ＬＥＤランプにおいて、前記冷却ファンはモータと該モータの周囲に形成された環状の空気流路と該空気流路に設けられた回転羽根を有する軸流ファンであり、前記中心貫通孔は前記モータに対応して配置され、前記管状貫通孔は前記環状の空気流路に対応して配置されてよい。   According to this embodiment, in the LED lamp, the cooling fan is an axial fan having a motor, an annular air flow path formed around the motor, and a rotary blade provided in the air flow path. The through hole may be arranged corresponding to the motor, and the tubular through hole may be arranged corresponding to the annular air flow path.

本実施形態によると前記ＬＥＤランプにおいて、前記カバーは、前記ヒートシンクを覆うように形成され、前記口金と反対側の端部に空気排出孔を有し、前記冷却ファンからの冷却用空気は、前記ヒートシンクの管状貫通孔を通り前記カバーの空気排出孔を経由して外部に導かれるように構成されてよい。   According to this embodiment, in the LED lamp, the cover is formed so as to cover the heat sink, has an air discharge hole at an end opposite to the base, and cooling air from the cooling fan It may be configured to be guided to the outside through the tubular through hole of the heat sink and the air discharge hole of the cover.

本実施形態によると前記ＬＥＤランプにおいて、前記カバーは、前記中心貫通孔のトップ側端部を塞ぐように構成されてよい。   According to this embodiment, in the LED lamp, the cover may be configured to close a top side end of the center through hole.

本実施形態によると前記ＬＥＤランプにおいて、前記冷却ファンの空気流路と前記管状貫通孔と前記カバーの空気排出孔はランプの中心軸線に平行な軸線に沿って一直線状に延びてよい。   According to this embodiment, in the LED lamp, the air flow path of the cooling fan, the tubular through hole, and the air discharge hole of the cover may extend in a straight line along an axis parallel to the central axis of the lamp.

本実施形態によると前記ＬＥＤランプにおいて、前記内側筒状部と前記外側筒状部の間に放射部が配置され、該放射部は円周方向に沿って等角度間隔に配置されてよい。   According to this embodiment, in the LED lamp, a radiating portion may be disposed between the inner cylindrical portion and the outer cylindrical portion, and the radiating portions may be disposed at equiangular intervals along the circumferential direction.

本実施形態によると前記ＬＥＤランプにおいて、前記外側筒状部の内面にフィンが形成されてよい。   According to this embodiment, in the LED lamp, fins may be formed on the inner surface of the outer cylindrical portion.

本実施形態によると前記ＬＥＤランプにおいて、前記ヒートシンクは押出一体成形品であってよい。   According to this embodiment, in the LED lamp, the heat sink may be an extrusion-integrated product.

本実施形態によると冷却ファンを備えたＬＥＤランプ用のヒートシンクにおいて、
内側筒状部と、該内側筒状部を囲むように且つ該内側筒状部と同心的に配置された外側筒状部と、前記内側筒状部と前記外側筒状部の間に放射状に設けられた放射部とを有し、前記外側筒状部の外面にＬＥＤ素子を備えた基板が装着され、前記内側筒状部によって軸線方向に延びる中心貫通孔が形成され、前記内側筒状部と前記外側筒状部の間に軸線方向に延びる管状貫通孔が形成されるように構成されている。 According to the present embodiment, in the heat sink for the LED lamp provided with the cooling fan,
An inner cylindrical portion, an outer cylindrical portion disposed concentrically with the inner cylindrical portion and surrounding the inner cylindrical portion, and radially between the inner cylindrical portion and the outer cylindrical portion A substrate provided with an LED element on the outer surface of the outer cylindrical portion, a central through hole extending in the axial direction is formed by the inner cylindrical portion, and the inner cylindrical portion A tubular through hole extending in the axial direction is formed between the outer cylindrical portion and the outer cylindrical portion.

本実施形態によると前記ヒートシンクにおいて、前記中心貫通孔は前記冷却ファンのモータに対応するように形成され、前記管状貫通孔は前記冷却ファンのモータの周囲に形成された環状の空気流路に対応するように形成されてよい。   According to this embodiment, in the heat sink, the central through hole is formed to correspond to the motor of the cooling fan, and the tubular through hole corresponds to an annular air flow path formed around the motor of the cooling fan. May be formed.

本実施形態によると前記ヒートシンクにおいて、前記外側筒状部の内面にフィンが設けられてよい。   According to this embodiment, in the heat sink, fins may be provided on the inner surface of the outer cylindrical portion.

本実施形態によると前記ヒートシンクＬＥＤランプにおいて、押出一体成形品であってよい。   According to the present embodiment, the heat sink LED lamp may be an extrusion integrally formed product.

本発明によれば、ＬＥＤの発光効率を向上させると同時に、冷却ファンによる冷却効果を高めることによって、高電力且つ高出力が可能なＬＥＤランプ及びそれに使用するヒートシンクを提供することができる。   According to the present invention, it is possible to provide an LED lamp capable of high power and high output and a heat sink used therefor by improving the luminous efficiency of the LED and at the same time enhancing the cooling effect of the cooling fan.

図１Ａは、本実施形態に係るＬＥＤランプの構成例を説明する斜視図である。FIG. 1A is a perspective view illustrating a configuration example of an LED lamp according to the present embodiment. 図１Ｂは、本実施形態に係るＬＥＤランプの構成例を説明する斜視図である。FIG. 1B is a perspective view illustrating a configuration example of the LED lamp according to the present embodiment. 図２は、本実施形態に係るＬＥＤランプの分解斜視図である。FIG. 2 is an exploded perspective view of the LED lamp according to the present embodiment. 図３は、本実施形態に係るＬＥＤランプにおける冷却用空気流を説明する説明図である。FIG. 3 is an explanatory diagram illustrating a cooling air flow in the LED lamp according to the present embodiment. 図４は、本実施形態に係るＬＥＤランプのヒートシンクの構造を説明する斜視図である。FIG. 4 is a perspective view for explaining the structure of the heat sink of the LED lamp according to the present embodiment. 図５は、本実施形態に係るＬＥＤランプのヒートシンクの軸線方向に沿った断面構造を説明する説明図である。FIG. 5 is an explanatory view illustrating a cross-sectional structure along the axial direction of the heat sink of the LED lamp according to the present embodiment. 図６は、本実施形態に係るＬＥＤランプのヒートシンクの軸線方向に垂直な平面構成を説明する説明図である。FIG. 6 is an explanatory diagram illustrating a planar configuration perpendicular to the axial direction of the heat sink of the LED lamp according to the present embodiment.

以下、本発明に係るＬＥＤランプの実施形態に関して、添付の図面を参照しながら詳細に説明する。なお、図中、同一の要素に対しては同一の参照符号を付して、重複した説明を省略する。   Hereinafter, embodiments of an LED lamp according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

図１Ａ及び図１Ｂを参照して本実施形態に係るＬＥＤランプの例を説明する。ＬＥＤランプ１０は、口金１３と、口金１３に接続された連結部材１９と、連結部材１９に装着された筐体２０と、筐体２０に取り付けられた円筒状の透光性のカバー３１とを有する。筐体２０は、接続部２１とファン収納部２３を含む。接続部２１は、外径が比較的小さい連結部材１９と外径が比較的大きいファン収納部２３を接続する。ファン収納部２３の円周状の縁にカバー３１が接続されている。カバー３１とファン収納部２３によって、略円筒状の内部空間が形成される。本実施形態に係るＬＥＤランプは所謂電球型である。ＬＥＤランプの内部構造は、図２を参照して説明する。   An example of the LED lamp according to the present embodiment will be described with reference to FIGS. 1A and 1B. The LED lamp 10 includes a base 13, a connecting member 19 connected to the base 13, a housing 20 attached to the connecting member 19, and a cylindrical translucent cover 31 attached to the housing 20. Have. The housing 20 includes a connection part 21 and a fan storage part 23. The connecting portion 21 connects the connecting member 19 having a relatively small outer diameter and the fan housing portion 23 having a relatively large outer diameter. A cover 31 is connected to the circumferential edge of the fan housing 23. The cover 31 and the fan storage portion 23 form a substantially cylindrical internal space. The LED lamp according to this embodiment is a so-called bulb type. The internal structure of the LED lamp will be described with reference to FIG.

図１Ａに示すように、ファン収納部２３に空気吸入孔２３１、２３２が形成されている。図１Ｂに示すように、カバー３１のトップ側端部には空気排出孔３２が形成されている。   As shown in FIG. 1A, air suction holes 231 and 232 are formed in the fan housing portion 23. As shown in FIG. 1B, an air discharge hole 32 is formed in the top side end portion of the cover 31.

図２を参照して、本実施形態に係るＬＥＤランプの内部構造を詳細に説明する。カバー３１とファン収納部２３によって形成された内部空間に、ヒートシンク１１と冷却ファン１５が配置されている。冷却ファン１５は口金１３とヒートシンク１１の間に配置されている。ヒートシンク１１と冷却ファン１５の間に、リング状の断熱部材１７が装着されている。断熱部材１７によって、ヒートシンク１１の熱が冷却ファンのモータ１５に伝達されることが阻止される。   With reference to FIG. 2, the internal structure of the LED lamp which concerns on this embodiment is demonstrated in detail. The heat sink 11 and the cooling fan 15 are disposed in the internal space formed by the cover 31 and the fan storage portion 23. The cooling fan 15 is disposed between the base 13 and the heat sink 11. A ring-shaped heat insulating member 17 is mounted between the heat sink 11 and the cooling fan 15. The heat insulating member 17 prevents the heat of the heat sink 11 from being transmitted to the motor 15 of the cooling fan.

ヒートシンク１１は、カバー３１の内部に配置されている。ヒートシンク１１は筒状又は柱状であり、その中心軸線（対称軸）は、ＬＥＤランプの中心軸線に整合している。ヒートシンク１１の各側面に基板３０Ｂが装着されている。ヒートシンク１１は基板を支持する支持体としても機能する。基板３０Ｂは細長い矩形であってよい。本実施形態では、基板３０Ｂは、ＬＥＤランプの中心軸線に平行に且つそれを囲むように配置されている。基板３０Ｂ上には、複数のＬＥＤ素子３０Ａが整列して装着されている。図示の例では、ヒートシンク１１は８角柱状であるが、４角柱状等の多角柱状であってもよい。   The heat sink 11 is disposed inside the cover 31. The heat sink 11 is cylindrical or columnar, and its central axis (symmetric axis) is aligned with the central axis of the LED lamp. A substrate 30 </ b> B is mounted on each side surface of the heat sink 11. The heat sink 11 also functions as a support for supporting the substrate. The substrate 30B may be an elongated rectangle. In the present embodiment, the substrate 30B is disposed so as to be parallel to and surround the central axis of the LED lamp. A plurality of LED elements 30A are aligned and mounted on the substrate 30B. In the illustrated example, the heat sink 11 has an octagonal column shape, but may have a polygonal column shape such as a quadrangular column shape.

ヒートシンク１１は、熱伝導性が高い金属、例えば、銅、アルミニウム合金、等によって構成される。ヒートシンク１１の内部には軸線方向に沿って貫通孔１１１が形成されている。この貫通孔の内面には、薄い板状の多数の放熱用のフィンが設けられている。フィンは、貫通孔の軸線方向に沿って全長に渡って延びている。フィンの形状は特に限定されない。   The heat sink 11 is made of a metal having high thermal conductivity, such as copper or an aluminum alloy. A through hole 111 is formed in the heat sink 11 along the axial direction. A large number of thin plate-like heat-dissipating fins are provided on the inner surface of the through hole. The fin extends over the entire length along the axial direction of the through hole. The shape of the fin is not particularly limited.

冷却ファン１５は、略円筒形状のファン収納部２３の内部に配置されている。冷却ファン１５の中心軸線（回転軸線）は、ＬＥＤランプの中心軸線に整合している。冷却ファン１５は、典型的にはケーシングとモータとファンを有する軸流ファンである。モータは、直流ブラシレスモータであってよい。モータの周囲に環状の空気流路が形成される。この空気流路に回転羽根が配置されている。   The cooling fan 15 is disposed inside a substantially cylindrical fan housing 23. The center axis (rotation axis) of the cooling fan 15 is aligned with the center axis of the LED lamp. The cooling fan 15 is typically an axial fan having a casing, a motor, and a fan. The motor may be a direct current brushless motor. An annular air flow path is formed around the motor. Rotating blades are disposed in the air flow path.

ＬＥＤランプの内部には、ＬＥＤ素子３０Ａ及び冷却ファン１５に接続されたリード線が設けられているが、ここでは図示を省略している。   Inside the LED lamp, lead wires connected to the LED element 30A and the cooling fan 15 are provided, but the illustration is omitted here.

図３を参照して、本実施形態に係るＬＥＤランプの空冷システムを説明する。本実施形態によると、接続部２１は、ファン収納部２３に接続されたトップ側端部２１ａと連結部材１９に接続された口金側端部２１ｂとを有し、トップ側端部２１ａの外径は口金側端部２１ｂの外径より小さい。即ち、接続部２１の外形は、口金側からトップ側に向かって細くなっている。ファン収納部２３は円筒部２３Ａと底面部２３Ｂを有し、略円筒容器の形状を有する。ファン収納部２３の底面部２３Ｂの外径は、接続部２１のトップ側端部２１ａより大きい。即ち、ファン収納部２３の底面部２３Ｂは、接続部２１のトップ側端部２１ａを囲む環状に形成されている。   With reference to FIG. 3, the air cooling system of the LED lamp which concerns on this embodiment is demonstrated. According to this embodiment, the connection part 21 has the top side edge part 21a connected to the fan accommodating part 23, and the nozzle | cap | die side edge part 21b connected to the connection member 19, The outer diameter of the top side edge part 21a Is smaller than the outer diameter of the base end 21b. That is, the outer shape of the connection portion 21 is narrowed from the base side toward the top side. The fan housing part 23 has a cylindrical part 23A and a bottom part 23B, and has a substantially cylindrical shape. The outer diameter of the bottom surface portion 23 </ b> B of the fan housing portion 23 is larger than the top side end portion 21 a of the connection portion 21. In other words, the bottom surface portion 23 </ b> B of the fan housing portion 23 is formed in an annular shape surrounding the top side end portion 21 a of the connection portion 21.

ファン収納部２３の円筒部２３Ａに第１の空気吸入孔２３１が形成され、ファン収納部２３の底面部２３Ｂに第２の空気吸入孔２３２が形成されている。カバー３１のトップ側端部には空気排出孔３２が形成されている。ファン収納部２３とカバー３１によって形成される内部空間は、空気吸入孔２３１、２３２と空気排出孔３２によって外部空間に接続されている。   A first air suction hole 231 is formed in the cylindrical portion 23 </ b> A of the fan storage portion 23, and a second air suction hole 232 is formed in the bottom surface portion 23 </ b> B of the fan storage portion 23. An air discharge hole 32 is formed at the top side end of the cover 31. The internal space formed by the fan housing 23 and the cover 31 is connected to the external space by the air suction holes 231 and 232 and the air discharge hole 32.

上述のように、ヒートシンク１１の内部には軸線方向に沿って貫通孔１１１が形成されている。貫通孔１１１の断面は、円形であってよいが、方形であってもよい。貫通孔１１１の中心軸線（回転軸線）は、ＬＥＤランプの中心軸線に整合している。貫通孔１１１は、冷却ファン１５側の第１の開口とトップ側の第２の開口を有し、２つの開口の間は密閉空間を形成している。図示のように、冷却ファン１５側の第２の開口は、カバー３１によって閉鎖されてよい。   As described above, the through hole 111 is formed in the heat sink 11 along the axial direction. The cross section of the through hole 111 may be circular, but may be square. The central axis (rotation axis) of the through hole 111 is aligned with the central axis of the LED lamp. The through hole 111 has a first opening on the cooling fan 15 side and a second opening on the top side, and forms a sealed space between the two openings. As illustrated, the second opening on the cooling fan 15 side may be closed by a cover 31.

冷却ファン１５は、円柱形状のモータ１５Ａとケーシング１５Ｂを有し、モータ１５Ａの周囲に環状の空気流路１５１が形成される。この空気流路１５１に回転羽根が配置されている。ファン収納部２３の円筒部２３Ａの内面とケーシング１５Ｂの外面の間に部品用空間２３Ｃが形成されている。部品用空間２３Ｃに、ファン駆動用の回路部品、ケーブル類等が配置されている。   The cooling fan 15 includes a cylindrical motor 15A and a casing 15B, and an annular air flow path 151 is formed around the motor 15A. A rotating blade is disposed in the air flow path 151. A component space 23C is formed between the inner surface of the cylindrical portion 23A of the fan housing portion 23 and the outer surface of the casing 15B. Circuit parts for driving the fan, cables, and the like are arranged in the part space 23C.

ヒートシンク１１の貫通孔１１１と冷却ファン１５の環状の空気流路１５１は、整合して配置されている。更に、ファン収納部２３の底面部２３Ｂの第２の空気吸入孔２３２は、冷却ファン１５の環状の空気流路１５１に接続されている。カバー３１の空気排出孔３２、ヒートシンク１１の貫通孔１１１、冷却ファン１５の環状の空気流路、及び、ファン収納部２３の第２の空気吸入孔２３２は、ＬＥＤランプの中心軸線に沿って、且つそれを囲むように整合して配置されている。即ち、カバー３１の空気排出孔３２、ヒートシンク１１の貫通孔１１１、冷却ファン１５の環状の空気流路１５１、及び、ファン収納部２３の第２の空気吸入孔２３２は、ＬＥＤランプの中心軸線に沿って一直線状に延びる空気流路を形成する。更に、ファン収納部２３の円筒部２３Ａの第１の空気吸入孔２３１は、部品用空間２３Ｃを介して冷却ファン１５の環状の空気流路１５１に接続されている。   The through hole 111 of the heat sink 11 and the annular air flow path 151 of the cooling fan 15 are arranged in alignment. Further, the second air suction hole 232 of the bottom surface part 23 </ b> B of the fan housing part 23 is connected to the annular air flow path 151 of the cooling fan 15. The air discharge hole 32 of the cover 31, the through hole 111 of the heat sink 11, the annular air flow path of the cooling fan 15, and the second air suction hole 232 of the fan housing portion 23 are along the central axis of the LED lamp, And it arrange | positions so that it may surround it. That is, the air discharge hole 32 of the cover 31, the through hole 111 of the heat sink 11, the annular air flow path 151 of the cooling fan 15, and the second air suction hole 232 of the fan housing portion 23 are in the center axis of the LED lamp. An air flow path extending along a straight line is formed. Further, the first air suction hole 231 of the cylindrical portion 23 </ b> A of the fan storage portion 23 is connected to the annular air flow path 151 of the cooling fan 15 through the component space 23 </ b> C.

冷却ファン１５を回転させると、環状の空気流路１５１に軸線方向の冷却用空気流が形成される。矢印は、冷却用空気流の経路を示す。ファン収納部２３の空気吸入孔２３１、２３２を経由して、外部空間から冷却ファン１５の環状の空気流路１５１に比較的温度が低い空気が流れ込む。冷却用空気は、冷却ファン１５を貫通し、ヒートシンク１１の貫通孔１１１に導かれる。冷却用空気は、第１の開口から貫通孔１１１に入り、第２の開口から出る。本実施形態のＬＥＤランプでは、冷却用空気は、ＬＥＤランプの中心軸線に沿って、冷却ファン１５からトップ側に向けて流れる。冷却後の比較的温度が高い空気は、カバー３１の空気排出孔３２を経由してＬＥＤランプ１０の外部に排出される。   When the cooling fan 15 is rotated, a cooling air flow in the axial direction is formed in the annular air flow path 151. Arrows indicate the path of the cooling air flow. Air having a relatively low temperature flows from the external space into the annular air flow path 151 of the cooling fan 15 via the air suction holes 231 and 232 of the fan housing 23. The cooling air passes through the cooling fan 15 and is guided to the through hole 111 of the heat sink 11. The cooling air enters the through-hole 111 from the first opening and exits from the second opening. In the LED lamp of this embodiment, cooling air flows from the cooling fan 15 toward the top side along the central axis of the LED lamp. The air having a relatively high temperature after cooling is discharged to the outside of the LED lamp 10 through the air discharge hole 32 of the cover 31.

冷却用空気がヒートシンク１１の貫通孔１１１に接触すると熱交換が行われ、冷却用空気はヒートシンク１１より熱を奪う。本実施形態では、ヒートシンク１１の貫通孔１１１は、両端の開口を除いて、密閉空間を有するから、冷却ファン１５からの冷却用空気は全てヒートシンク１１の貫通孔１１１内を通過し、ヒートシンク１１の冷却に使用される。従って、ヒートシンク１１を効率的に冷却することができる。こうして、ＬＥＤ３０が高温となることはない。   When the cooling air contacts the through hole 111 of the heat sink 11, heat exchange is performed, and the cooling air takes heat away from the heat sink 11. In this embodiment, since the through hole 111 of the heat sink 11 has a sealed space except for the openings at both ends, all the cooling air from the cooling fan 15 passes through the through hole 111 of the heat sink 11 and Used for cooling. Therefore, the heat sink 11 can be efficiently cooled. Thus, the LED 30 does not reach a high temperature.

本実施形態のＬＥＤランプ１０では、ファン収納部２３の円筒部２３Ａ及び底面部２３Ｂに設けられた空気吸入孔２３１、２３２から外部の空気が取り入れられて、ヒートシンク１１の冷却用空気として用いられる。従って、ヒートシンク１１及びそれに装着されたＬＥＤ素子３０Ａを効果的に冷却することができる。   In the LED lamp 10 of the present embodiment, external air is taken in from the air suction holes 231 and 232 provided in the cylindrical portion 23 </ b> A and the bottom surface portion 23 </ b> B of the fan housing portion 23 and used as cooling air for the heat sink 11. Therefore, the heat sink 11 and the LED element 30A attached thereto can be effectively cooled.

本実施形態のＬＥＤランプ１０では、接続部２１のトップ側端部２１ａの外径が比較的小さく形成されているため、ファン収納部２３の第２の空気流入孔２３２の面積を大きくとれる。そのため、外部の空気を取り込み易くなる。また、接続部２１の口金側端部２１ｂの外径が比較的大きく形成されているため、接続部２１と連結部１９及び口金１３の間の取り付け強度を大きくすることができる。そのため、ランプの取り付け取り外しにおける口金１３の破損等を防止できる。   In the LED lamp 10 of the present embodiment, the outer diameter of the top side end portion 21a of the connecting portion 21 is formed to be relatively small, so that the area of the second air inflow hole 232 of the fan housing portion 23 can be increased. Therefore, it becomes easy to take in external air. Moreover, since the outer diameter of the base-side end portion 21b of the connection portion 21 is formed to be relatively large, the attachment strength between the connection portion 21, the connecting portion 19, and the base 13 can be increased. For this reason, it is possible to prevent the base 13 from being damaged when the lamp is attached or detached.

更に、外部の空気は、先ず、ファン収納部２３の内部に導かれる。従って、外部からの比較的低温の空気は、ファン収納部２３に収納された冷却ファン１５ばかりでなく、そこに配置された回路部品等に接触する。従って、冷却ファン１５のモータ１５Ａばかりでなく、回路部品等の高温化を回避することができる。従って、冷却ファンのモータの潤滑油の劣化に起因する冷却ファンの性能低下を回避することができる。回路部品等の高温化に起因した劣化及び誤作動を防止することができる。   Further, the external air is first guided into the fan housing 23. Therefore, the relatively low temperature air from the outside contacts not only the cooling fan 15 housed in the fan housing part 23 but also circuit components arranged there. Therefore, not only the motor 15A of the cooling fan 15 but also high temperatures of circuit components and the like can be avoided. Accordingly, it is possible to avoid a decrease in performance of the cooling fan due to deterioration of the lubricating oil of the motor of the cooling fan. It is possible to prevent deterioration and malfunction due to high temperature of circuit components and the like.

図４を参照して本実施形態のヒートシンクの構造の例を説明する。図４は、本実施形態のＬＥＤランプの内部空間に装着されたヒートシンク１１、断熱部材１７及び冷却ファン１５を取り出した状態にて示す。本実施形態のヒートシンク１１は、中心の内側筒状部１１Ａと、その周りに同心状に配置された外側筒状部１１Ｂと、両者の間に設けられた板状の放射状部１１Ｃを有する。外側筒状部１１Ｂの内面には、板状の多数の放熱用のフィン１１３が形成されている。外側筒状部１１Ｂの外面１１５には、基板３０Ｂ（図２）が装着される。   An example of the structure of the heat sink of this embodiment will be described with reference to FIG. FIG. 4 shows a state in which the heat sink 11, the heat insulating member 17, and the cooling fan 15 mounted in the internal space of the LED lamp of this embodiment are taken out. The heat sink 11 of the present embodiment includes a central inner cylindrical portion 11A, an outer cylindrical portion 11B disposed concentrically around the central cylindrical portion 11A, and a plate-shaped radial portion 11C provided therebetween. A large number of plate-like heat-dissipating fins 113 are formed on the inner surface of the outer cylindrical portion 11B. A substrate 30B (FIG. 2) is mounted on the outer surface 115 of the outer cylindrical portion 11B.

本実施形態では、内側筒状部１１Ａは円形断面の管状又は筒状に形成されているが、多角形断面の管状又は筒状に形成されてもよい。本実施形態では外側筒状部１１Ｂは、正八角形断面の管状又は筒状に形成されているが、四角形断面、六角形断面等の多角形断面の管状又は筒状に形成されてよい。放射状部１１Ｃは、内側筒状部１１Ａと外側筒状部１１Ｂの間に、円周方向に沿って等角度間隔に設けられている。放射状部１１Ｃは、内側筒状部１１Ａの外面から外側筒状部１１Ｂの内面の角部まで放射状に延びている。   In the present embodiment, the inner cylindrical portion 11A is formed in a tubular or tubular shape having a circular cross section, but may be formed in a tubular or tubular shape having a polygonal cross section. In the present embodiment, the outer cylindrical portion 11B is formed in a regular octagonal cross-section tubular or cylindrical shape, but may be formed in a polygonal cross-section tubular or cylindrical shape such as a quadrangular cross section or a hexagonal cross section. The radial portions 11C are provided at equiangular intervals along the circumferential direction between the inner cylindrical portion 11A and the outer cylindrical portion 11B. The radial portion 11C extends radially from the outer surface of the inner cylindrical portion 11A to the corner of the inner surface of the outer cylindrical portion 11B.

上述のように、ヒートシンク１１には、冷却ファン１５側の第１の端部からトップ側の第２の端部まで軸線方向に延びる貫通孔１１１が形成されている。貫通孔１１１は、内側筒状部１１Ａによって形成された中心貫通孔１１１Ａと、内側筒状部１１Ａと外側筒状部１１Ｂの間に形成された管状貫通孔１１１Ｂを有する。中心貫通孔１１１Ａには流速が比較的小さい微風冷却空気流が形成され、管状貫通孔１１１Ｂには流速が比較的大きい強風冷却空気流が形成される。管状貫通孔１１１Ｂは放射状部１１Ｃによって８つのセグメントに分割されている。各セグメントは略台形又は略扇形の断面形状を有する。   As described above, the heat sink 11 is formed with the through hole 111 extending in the axial direction from the first end on the cooling fan 15 side to the second end on the top side. The through-hole 111 has a central through-hole 111A formed by the inner cylindrical portion 11A, and a tubular through-hole 111B formed between the inner cylindrical portion 11A and the outer cylindrical portion 11B. A breeze cooling air flow having a relatively low flow rate is formed in the central through hole 111A, and a strong wind cooling air flow having a relatively high flow rate is formed in the tubular through hole 111B. The tubular through hole 111B is divided into eight segments by the radial portion 11C. Each segment has a substantially trapezoidal or substantially sectoral cross-sectional shape.

図５はヒートシンク１１、断熱部材１７及び冷却ファン１５の軸線方向に沿った断面構造を示す。中心貫通孔１１１Ａ、管状貫通孔１１１Ｂ、放射状部１１Ｃ及びフィン１１３は、ヒートシンク１１の冷却ファン１５側の第１の端部からトップ側の第２の端部まで軸線方向に沿って全長に渡って延びている。   FIG. 5 shows a cross-sectional structure along the axial direction of the heat sink 11, the heat insulating member 17, and the cooling fan 15. The central through-hole 111A, the tubular through-hole 111B, the radial portion 11C, and the fin 113 extend over the entire length along the axial direction from the first end portion on the cooling fan 15 side of the heat sink 11 to the second end portion on the top side. It extends.

冷却ファン１５は、円柱形状のモータ１５Ａとケーシング１５Ｂを有する軸流ファンであり、モータ１５Ａの周囲に環状の空気流路１５１が形成される。環状の空気流路１５１には回転羽根が設けられているが、ここではその図示を省略している。モータ１５Ａは中心貫通孔１１１Ａに対応して配置されている。即ち、内側筒状部１１Ａの外径はモータ１５Ａの外径は略等しい。環状の空気流路１５１は管状貫通孔１１１Ｂに対応して配置されている。上述のように、冷却ファン１５の環状の空気流路１５１は、ヒートシンク１１の管状貫通孔１１１Ｂに接続され、ランプの中心軸線に平行な連続的な一直線状の冷却空気流路を形成する。   The cooling fan 15 is an axial fan having a cylindrical motor 15A and a casing 15B, and an annular air passage 151 is formed around the motor 15A. The annular air channel 151 is provided with a rotating blade, but the illustration thereof is omitted here. The motor 15A is disposed corresponding to the central through hole 111A. That is, the outer diameter of the inner cylindrical portion 11A is substantially equal to the outer diameter of the motor 15A. The annular air flow path 151 is disposed corresponding to the tubular through hole 111B. As described above, the annular air flow path 151 of the cooling fan 15 is connected to the tubular through hole 111B of the heat sink 11 and forms a continuous straight cooling air flow path parallel to the central axis of the lamp.

本実施形態では、ヒートシンク１１と冷却ファン１５の間にリング状の断熱部材１７が装着されている。従って、内側筒状部１１Ａの冷却ファン１５側の第１の端部とモータ１５Ａの間に僅かな隙間１７１が形成されている。この隙間１７１の厚さは、断熱部材１７の厚さに対応している。この隙間１７１を介して、中心貫通孔１１１Ａと冷却ファン１５の環状の空気流路１５１は接続されている。   In the present embodiment, a ring-shaped heat insulating member 17 is mounted between the heat sink 11 and the cooling fan 15. Therefore, a slight gap 171 is formed between the first end portion of the inner cylindrical portion 11A on the cooling fan 15 side and the motor 15A. The thickness of the gap 171 corresponds to the thickness of the heat insulating member 17. Via this gap 171, the central through hole 111 </ b> A and the annular air flow path 151 of the cooling fan 15 are connected.

冷却ファン１５を回転させると、環状の空気流路１５１に軸線方向の冷却用空気流が形成される。冷却用空気の大部分又は殆どは、管状貫通孔１１１Ｂに導かれる。冷却用空気の残余又は僅かな部分は、隙間１７１を経由して、中心貫通孔１１１Ａに導かれる。管状貫通孔１１１Ｂに導かれた冷却用空気は外側筒状部１１Ｂ及びフィン１１３に直接接触し、そこから熱を奪う。外側筒状部１１Ｂの外面１１５に装着された基板３０Ｂ上のＬＥＤ素子３０Ａが冷却される。中心貫通孔１１１Ａに導かれた冷却用空気は外側筒状部１１Ｂに接触しないが、内側筒状部１１Ａに直接接触し、そこから熱を奪うと同時に中心貫通孔１１１Ａ内の空気を押し出し、置換する。   When the cooling fan 15 is rotated, a cooling air flow in the axial direction is formed in the annular air flow path 151. Most or most of the cooling air is guided to the tubular through hole 111B. The remaining or a small portion of the cooling air is guided to the central through hole 111A via the gap 171. The cooling air guided to the tubular through-hole 111B directly contacts the outer cylindrical portion 11B and the fins 113, and takes heat away from it. The LED element 30A on the substrate 30B mounted on the outer surface 115 of the outer cylindrical portion 11B is cooled. The cooling air guided to the central through-hole 111A does not contact the outer cylindrical portion 11B, but directly contacts the inner cylindrical portion 11A, takes heat away from it, and simultaneously pushes out the air in the central through-hole 111A for replacement. To do.

図６を参照して本実施形態のヒートシンク１１の平面構成を説明する。本実施形態のヒートシンク１１の断面は、円形の内側筒状部１１Ａと、正八角形の外側筒状部１１Ｂと、放射状に延びる放射状部１１Ｃを有する。外側筒状部１１Ｂの内面には複数のフィン１１３が設けられている。フィン１１３は、外側筒状部１１Ｂの内面に対して垂直に内方に突出している。図示の例では、外側筒状部１１Ｂの各内面に４本のフィン１１３が設けられているが、フィン１１３の数及び高さは特に限定されない。外側筒状部１１Ｂの各外面１１５に基板３０Ｂが装着され、そこにＬＥＤ素子３０Ａが装着されている。   The planar configuration of the heat sink 11 of the present embodiment will be described with reference to FIG. The cross section of the heat sink 11 of the present embodiment includes a circular inner cylindrical portion 11A, a regular octagonal outer cylindrical portion 11B, and a radial portion 11C extending radially. A plurality of fins 113 are provided on the inner surface of the outer cylindrical portion 11B. The fin 113 protrudes inward perpendicularly to the inner surface of the outer cylindrical portion 11B. In the illustrated example, four fins 113 are provided on each inner surface of the outer cylindrical portion 11B, but the number and height of the fins 113 are not particularly limited. A substrate 30B is attached to each outer surface 115 of the outer cylindrical portion 11B, and an LED element 30A is attached thereto.

外側筒状部１１Ｂの外面の各頂点には凹部１１７が形成されている。凹部１１７はヒートシンク１１の冷却ファン１５側の第１の端部からトップ側の第２の端部まで軸線方向に沿って全長に渡って延びている。凹部１１７の断面は円形の一部分である。放射状部１１Ｃは、内側筒状部１１Ａの外面から凹部１１７の外面まで放射状に延びている。本実施形態のヒートシンク１１は押し出し成形によって形成される一体成形品である。従って、長尺の成形品が安価に製造することが可能である。尚、凹部１１７を設けることによって押し成形加工が容易化される。   A concave portion 117 is formed at each vertex of the outer surface of the outer cylindrical portion 11B. The recess 117 extends over the entire length along the axial direction from the first end of the heat sink 11 on the cooling fan 15 side to the second end of the top side. The cross section of the recess 117 is a part of a circle. The radial portion 11 </ b> C extends radially from the outer surface of the inner cylindrical portion 11 </ b> A to the outer surface of the recess 117. The heat sink 11 of this embodiment is an integrally molded product formed by extrusion molding. Therefore, a long molded product can be manufactured at low cost. In addition, the press molding process is facilitated by providing the recess 117.

以上、本実施形態に係るＬＥＤランプ及びそれを使用するヒートシンクについて説明したが、これらは例示であって、本発明の範囲を制限するものではない。当業者が、本実施形態に対して容易になしえる追加・削除・変更・改良等は、本発明の範囲内である。本発明の技術的範囲は、添付の特許請求の記載によって定められる。   Although the LED lamp and the heat sink using the LED lamp according to the present embodiment have been described above, these are examples and do not limit the scope of the present invention. Additions, deletions, changes, improvements, and the like that can be easily made by those skilled in the art with respect to the present embodiment are within the scope of the present invention. The technical scope of the present invention is defined by the appended claims.

１０…ＬＥＤランプ、１１…ヒートシンク、１１Ａ…内側筒状部、１１Ｂ…外側筒状部、１１Ｃ…放射状部、１３…口金、１５…冷却ファン、１７…断熱部材、１９…連結部材、２０…筐体、２１…接続部、２１ａ…トップ側端部、２１ｂ…口金側端部、２３…ファン収納部、２３Ａ…円筒部、２３Ｂ…底面部、２３Ｃ…部品用空間、３０…ＬＥＤ、３０Ａ…ＬＥＤ素子、３０Ｂ…基板、３１…カバー、３２…空気排出孔、１１１…貫通孔、１１１Ａ…中心貫通孔、１１１Ｂ…管状貫通孔、１１３…フィン、１１５…外面、１１７…凹部、１５１…空気流路、２３１、２３２…空気吸入孔 DESCRIPTION OF SYMBOLS 10 ... LED lamp, 11 ... Heat sink, 11A ... Inner cylindrical part, 11B ... Outer cylindrical part, 11C ... Radial part, 13 ... Base, 15 ... Cooling fan, 17 ... Thermal insulation member, 19 ... Connecting member, 20 ... Housing Body, 21 ... Connection portion, 21a ... Top side end portion, 21b ... Base side end portion, 23 ... Fan storage portion, 23A ... Cylinder portion, 23B ... Bottom portion, 23C ... Space for parts, 30 ... LED, 30A ... LED Element, 30B ... Substrate, 31 ... Cover, 32 ... Air exhaust hole, 111 ... Through hole, 111A ... Center through hole, 111B ... Tubular through hole, 113 ... Fin, 115 ... Outer surface, 117 ... Recess, 151 ... Air flow path , 231, 232 ..air intake holes

Claims (10)

口金と、中心軸線に沿って延びる貫通孔を有する筒状のヒートシンクと、該ヒートシンクの側面に配置された基板と、該基板に装着されたＬＥＤ素子と、前記口金と前記ヒートシンクの間に配置された冷却ファンと、該冷却ファンを覆う筐体と、前記基板と前記ＬＥＤ素子を覆う透光性のカバーと、を有し、前記冷却ファンの中心軸線と前記ヒートシンクの中心軸線はランプの中心軸線に整合しており、
前記冷却ファンはモータと該モータの周囲に形成された環状の空気流路と該空気流路に設けられた回転羽根を有する軸流ファンであり、
前記ヒートシンクは、同心状に配置された内側筒状部と外側筒状部を有し、前記内側筒状部の内側に中心貫通孔が形成され、前記内側筒状部と前記外側筒状部の間に管状貫通孔が形成され、前記中心貫通孔は前記モータに対応して配置され、前記管状貫通孔は前記環状の空気流路に対応して配置され、前記中心貫通孔の断面の寸法は前記モータの断面の寸法に対応しており、前記管状貫通孔の断面の寸法は前記環状の空気流路の断面の寸法に対応していること特徴とするＬＥＤランプ。 A base, a cylindrical heat sink having a through hole extending along the central axis, a substrate disposed on a side surface of the heat sink, an LED element mounted on the substrate, and the base and the heat sink are disposed between the base and the heat sink. A cooling fan, a casing that covers the cooling fan, and a light-transmitting cover that covers the substrate and the LED element, and the central axis of the cooling fan and the central axis of the heat sink are the central axes of the lamp Is consistent with
The cooling fan is an axial fan having a motor, an annular air passage formed around the motor, and a rotary blade provided in the air passage,
The heat sink has an inner cylindrical portion and an outer cylindrical portion arranged concentrically, a center through hole is formed inside the inner cylindrical portion, and the inner cylindrical portion and the outer cylindrical portion are formed. A tubular through hole is formed therebetween, the central through hole is disposed corresponding to the motor, the tubular through hole is disposed corresponding to the annular air flow path, and a cross-sectional dimension of the central through hole is The LED lamp corresponds to a cross-sectional dimension of the motor, and a cross-sectional dimension of the tubular through hole corresponds to a cross-sectional dimension of the annular air flow path. 請求項１記載のＬＥＤランプにおいて、
前記カバーは、前記ヒートシンクを覆うように形成され、前記口金と反対側の端部に空気排出孔を有し、前記冷却ファンからの冷却用空気は、前記ヒートシンクの管状貫通孔を通り前記カバーの空気排出孔を経由して外部に導かれるように構成されていることを特徴とするＬＥＤランプ。 The LED lamp according to claim 1, wherein
The cover is formed to cover the heat sink, and has an air discharge hole at an end opposite to the base. Cooling air from the cooling fan passes through the tubular through hole of the heat sink and An LED lamp configured to be guided to the outside through an air discharge hole. 請求項１又は２記載のＬＥＤランプにおいて、
前記カバーは、前記中心貫通孔のトップ側端部を塞ぐように構成されていることを特徴とするＬＥＤランプ。 The LED lamp according to claim 1 or 2,
The LED lamp is characterized in that the cover is configured to close a top side end of the central through hole. 請求項２又は３記載のＬＥＤランプにおいて、
前記冷却ファンの空気流路と前記管状貫通孔と前記カバーの空気排出孔はランプの中心軸線に平行な軸線に沿って一直線状に延びていることを特徴とするＬＥＤランプ。 The LED lamp according to claim 2 or 3,
The LED lamp according to claim 1, wherein the air flow path of the cooling fan, the tubular through hole, and the air discharge hole of the cover extend in a straight line along an axis parallel to a central axis of the lamp. 請求項１〜４のいずれか１項記載のＬＥＤランプにおいて、
前記内側筒状部と前記外側筒状部の間に放射部が配置され、該放射部は円周方向に沿って等角度間隔に配置されていることを特徴とするＬＥＤランプ。 In the LED lamp of any one of Claims 1-4,
An LED lamp, wherein a radiating portion is arranged between the inner cylindrical portion and the outer cylindrical portion, and the radiating portions are arranged at equiangular intervals along a circumferential direction. 請求項１〜５のいずれか１項記載のＬＥＤランプにおいて、
前記外側筒状部の内面にフィンが形成されていることを特徴とするＬＥＤランプ。 In the LED lamp of any one of Claims 1-5,
An LED lamp, wherein fins are formed on an inner surface of the outer cylindrical portion. 請求項１〜６のいずれか１項記載のＬＥＤランプにおいて、
前記ヒートシンクは押出一体成形品であること特徴とするＬＥＤランプ。 In the LED lamp of any one of Claims 1-6,
The LED heat lamp, wherein the heat sink is an extrusion-integrated product. モータと回転羽根を有する軸流ファン型の冷却ファンを備えたＬＥＤランプ用のヒートシンクにおいて、
内側筒状部と、該内側筒状部を囲むように且つ該内側筒状部と同心的に配置された外側筒状部と、前記内側筒状部と前記外側筒状部の間に放射状に設けられた放射部とを有し、前記外側筒状部の外面にＬＥＤ素子を備えた基板が装着され、前記内側筒状部によって軸線方向に延びる中心貫通孔が形成され、前記内側筒状部と前記外側筒状部の間に軸線方向に延びる管状貫通孔が形成され、
前記中心貫通孔の断面の寸法は前記モータの断面の寸法に対応しており、前記管状貫通孔の断面の寸法は前記モータの周囲の環状の空気流路の断面の寸法に対応していること特徴とするヒートシンク。 In a heat sink for an LED lamp having an axial fan type cooling fan having a motor and rotating blades,
An inner cylindrical portion, an outer cylindrical portion disposed concentrically with the inner cylindrical portion and surrounding the inner cylindrical portion, and radially between the inner cylindrical portion and the outer cylindrical portion A substrate provided with an LED element on the outer surface of the outer cylindrical portion, a central through hole extending in the axial direction is formed by the inner cylindrical portion, and the inner cylindrical portion And a tubular through-hole extending in the axial direction is formed between the outer cylindrical portion,
The cross-sectional dimension of the central through-hole corresponds to the cross-sectional dimension of the motor, and the cross-sectional dimension of the tubular through-hole corresponds to the cross-sectional dimension of the annular air flow path around the motor. Features heat sink. 請求項８記載のヒートシンクにおいて、
前記外側筒状部の内面にフィンが設けられていることを特徴とするヒートシンク。 The heat sink according to claim 8,
A heat sink, wherein fins are provided on an inner surface of the outer cylindrical portion. 請求項８又は９記載のヒートシンクにおいて、
押出一体成形品であること特徴とするヒートシンク。
The heat sink according to claim 8 or 9,
A heat sink characterized by being an extrusion-integrated product.
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