EP2390564A2 - Lampe und Wärmesenke dafür - Google Patents

Lampe und Wärmesenke dafür Download PDF

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Publication number
EP2390564A2
EP2390564A2 EP10010466A EP10010466A EP2390564A2 EP 2390564 A2 EP2390564 A2 EP 2390564A2 EP 10010466 A EP10010466 A EP 10010466A EP 10010466 A EP10010466 A EP 10010466A EP 2390564 A2 EP2390564 A2 EP 2390564A2
Authority
EP
European Patent Office
Prior art keywords
lamp
lateral wall
face
heat sink
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10010466A
Other languages
English (en)
French (fr)
Other versions
EP2390564A3 (de
EP2390564B1 (de
Inventor
Alex Horng
I-Le Fang
Ming-Tsung Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sunonwealth Electric Machine Industry Co Ltd
Original Assignee
Sunonwealth Electric Machine Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunonwealth Electric Machine Industry Co Ltd filed Critical Sunonwealth Electric Machine Industry Co Ltd
Publication of EP2390564A2 publication Critical patent/EP2390564A2/de
Publication of EP2390564A3 publication Critical patent/EP2390564A3/de
Application granted granted Critical
Publication of EP2390564B1 publication Critical patent/EP2390564B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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]

Definitions

  • the present invention generally relates to a lamp and a heat sink thereof and, more particularly, to an embedded lamp utilizing a fan to trigger air flow for ventilation, as well as a heat sink thereof.
  • Taiwan Patent Number M330426 discloses a conventional lamp as shown in Fig. 1 .
  • the lamp as shown is 180 degree inversed to an assembly direction.
  • the lamp has a cooling base 81, a circuit board 82, a light-emitting diode (LED) module 83, a cooling fan 84 and a lamp head 85.
  • the cooling base 81 has a concave portion 811 and a receiving portion 812.
  • the circuit board 82 and LED module 83 are received in the concave portion 811.
  • the cooling fan 84 is received in the receiving portion 812.
  • the lamp head 85 is coupled to an outer portion of the receiving portion 812.
  • the cooling base 81 includes a plurality of heat-dissipating holes 813 extending into the receiving portion 812.
  • the lamp head 85 includes a plurality of vents 851 into which external air is drawn. During operation of the lamp, the external air is drawn into the receiving portion 812 via the vents 851 and then exhausted out of the receiving portion 812 via the heat-dissipating holes 813 to dissipate the heat generated by the lamp head 85.
  • the lamp head 85 When in use, the lamp head 85 is coupled to a lamp seat; and the vents 851 and the heat-dissipating holes 813 are in contact with external air so that air inside the receiving portion 812 is allowed to exchange with the external air.
  • the vents 851 from where the external air is drawn into the receiving portion 812 are located in a relatively upper portion of the lamp where hot air tends to gather (this is because in thermal convection theory, heat air tends to float around higher areas than cool air).
  • the exhausted heat air from the heat-dissipating holes 813 tends to gather around the relatively upper portion of the lamp and is therefore re-drawn into the receiving portion 812 via the vents 851, leading to degradation of cooling efficiency.
  • the heat-dissipating holes 813 and the vents 851 are placed right above the plate-type ceiling, and only the LED module 83 and its related portions remain beneath the plate-type ceiling for illumination purpose.
  • the area above the plate-type ceiling is an enclosed space with poor air circulation, therefore resulting in poor heat dissipation. As a result, service life of the lamp is shortened.
  • Taiwan Patent Number M346745 discloses another conventional lamp as shown in Fig. 2 .
  • the lamp includes an upper casing 91, a lower casing 92, a heat-dissipating assembly 93 and a LED assembly 94.
  • the upper casing 91 includes a receiving room 911 in which the heat-dissipating assembly 93 and LED assembly 94 may be disposed.
  • the upper casing 91 and lower casing 92 together may form a housing of a lamp.
  • the upper housing 91 includes a plurality of vents 912 and the lower housing 92 includes a plurality of through-holes 921.
  • vents 912 are still located in a relatively upper portion of the lamp where the heat air exhausted from the through-holes 921 tends to gather. As a result, the heat air is re-drawn into the lamp via the vents 912, affecting the cooling efficiency of the lamp.
  • the through-holes 921 are in contact with external air when the conventional lamp is inserted into the plate-type ceiling, the cooling efficiency of the lamp is not improved by much since the vents 912 are still located in the enclosed space right above the plate-type ceiling.
  • the invention discloses a lamp comprising a housing, a heat sink, a fan and a light-emitting element.
  • the housing includes an opening end and a compartment communicating with the opening end.
  • the lamp is characterized in that the heat sink is disposed at the opening end and includes a lateral wall, a base, a plurality of first connection members, a plurality of first air channels and at least one second air channel.
  • the base is surrounded by and spaced from the lateral wall.
  • the base is connected to an inner circumferential wall of the lateral wall via the first connection members, wherein each of the first air channels is formed between adjacent two of the first connection members.
  • the at least one second air channel is formed between an outer circumferential wall of the lateral wall and an inner face of the housing.
  • the fan is disposed at one side of the heat sink in the compartment.
  • the light-emitting element is disposed at another side of the heat sink.
  • the invention discloses a heat sink of a lamp comprising a lateral wall, a plurality of first connection members, a base, a plurality of first air channels and a second connection member.
  • the base is surrounded by and spaced from the lateral wall, and connected to an inner circumferential wall of the lateral wall via the first connection members.
  • Each of the first air channels is formed between adjacent two of the first connection members.
  • the second connection member is connected to an outer circumferential wall of the lateral wall.
  • a lamp comprising a housing 1, a heat sink 2, a fan 3 and a light-emitting element 4 is disclosed according to a first embodiment of the invention.
  • the heat sink 2 is disposed between the fan 3 and light-emitting element 4 and covered by the housing 1 when assembling the lamp.
  • heat air inside the lamp may flow through the heat sink 2 to exchange with the external air for heat dissipation purpose of the light-emitting element 4.
  • the housing 1 includes an opening end 11 on an end thereof, as well as a compartment 12.
  • the heat sink 2 is disposed at the opening end 11 of the housing 1 and preferably made of materials with high heat conductivity.
  • the heat sink 2 includes a lateral wall 21, a base 22, a plurality of first connection members 23, a plurality of first air channels 24 and at least one second air channel 25.
  • the lateral wall 21 may be an annual wall.
  • the base 22 is surrounded by and spaced from the lateral wall 21.
  • the base 22 is connected to an inner circumferential wall of the lateral wall 21 via the first connection members 23.
  • Each first air channel 24 is formed between two adjacent first connection members 23, and includes a first end communicating with the compartment 12 and a second end located around the opening end 11.
  • the base 22 includes a first face 221 and a second face 222, with the first face 221 facing the compartment 12 and the second face 222 opposite to the first face 221.
  • Each first connection member 23 may be a fin which extends in a radial direction from the inner circumferential wall of the lateral wall 21 towards a center of the lateral wall 21.
  • Each first connection member 23 is designed to protrude from the first face 221 to increase the heat exchange area of the first face 221.
  • the first face 221 includes a protrusion 223 in a center thereof.
  • the at least one second air channel 25 is formed between an outer circumferential wall of the lateral wall 21 and an inner face of the housing 1.
  • the outer circumferential wall of the lateral wall 21 includes a second connection member 26 extending outwards therefrom.
  • the second connection member 26 may be integrally formed with or connected to the lateral wall 21.
  • the second connection member 26 may include a plurality of fins to increase the heat exchange area of the outer circumferential wall of the lateral wall 21, and the number of the at least one second air channel 25 is plural, with adjacent two of the fins having one of the second air channels 25 formed therebetween.
  • the at least one second air channel 25 includes a first end communicating with the compartment 12 and a second end located on the opening end 11.
  • connection member 26 may be connected to and surrounded by an outer ring portion 27.
  • the outer ring portion 27 may be an integrally-formed ring (as shown in Fig. 3 ) or a plurality of linking members circularly arranged in a ring-like route when any two of the linking members are spaced apart.
  • the heat sink 2 may be assembled with the housing 1 in a way that allows the lateral wall 21 to protrude from the opening end 11.
  • the outer ring portion 27 may be disposed at the opening end 11 of the housing 1.
  • the lateral wall 21 includes an upper edge 211 and a lower edge 212 opposite the upper edge 211.
  • the upper edge 211 and the first face 221 of the base 22 both face the compartment 12.
  • the lower edge 212 preferably protrudes from the outer ring portion 27 along an axial direction away from the housing 1.
  • the lower edge 212 may also protrude from the second face 222 of the base 22 along the axial direction, away from the housing 1 so as to separate the second ends of the first air channels 24 from the second end of the at least one second air channel 25.
  • the fan 3 is disposed at one side of the heat sink 2 in the compartment 12 and includes two sides 30a and 30b, with the first ends of the first air channels 24 communicating with the side 30b and the first end of the at least one second air channel 25 communicating with the side 30a. Based on this, the fan 3 may guide airflow between the first air channels 24 and the at least one second air channel 25.
  • the fan 3 includes a frame 31 having a plurality of assembly portions 32.
  • the lateral wall 21 may also include a plurality of fixing portions 213 for fixing the fan 3 on the heat sink 2 via a plurality of fixing members extending into the assembly portions 32 and the fixing portions 213.
  • the light-emitting element 4 is disposed at another side of the heat sink 2 and includes a base plate 41 and at least one light-emitting member 42.
  • the at least one light-emitting member 42 may preferably be a LED module disposed on one side of the base plate 41.
  • the fan 3 and the light-emitting element 4 are disposed on two sides of the heat sink 2, with the fan 3 facing the first face 221 of the base 22 and being supported by the protrusion 223.
  • the light-emitting element 4 is coupled to the second face 222 of the base 22 via the base plate 41 thereof.
  • the heat sink 2 is disposed at the opening end 11 of the housing 1 via the outer ring portion 27 in order for the fan 3 to be received in the compartment 12 and for the at least one light-emitting member 42 to be exposed outside at the opening end 11.
  • the external air may be drawn into the compartment 12 through one of the first air channels 24 and the at least one second air channel 25, and then exhausted out of the compartment 12 through another one, because the first ends of the first air channels 24 communicate with the side 30b and the first end of the at least one second air channel 25 communicates with the side 30a, and the second ends of the first air channels 24 and the at least one second air channel 25 communicate with the external air.
  • the drawn-in external air may be separated from the exhausted heat air.
  • the housing 1 when in use, the housing 1 is inserted into a plate-type ceiling 5, with the outer ring portion 27 preferably abutting with the plate-type ceiling 5.
  • the external air may be drawn into the compartment 12 through the first air channels 24 and the least one second air channel 25, and then dispelled out of the compartment 12 through another one.
  • rotation direction of the fan 3 may be changed to control direction of air flow. For example, when the fan 3 rotates in a counterclockwise direction, the external air may be drawn into the compartment 12 via the at least one second air channel 25 and then dispelled out of the compartment 12 via the first air channels 24.
  • the external air may be drawn into the compartment 12 via the first air channels 24 and then dispelled out of the compartment 12 via the at least one second air channel 25.
  • heat generated by the light-emitting element 4 is dispelled.
  • the first air channels 24 and the at least one second air channel 25 are arranged in a way that allows contact with the external air beneath the plate-type ceiling 5, thus ensuring better ventilation of the lamp.
  • the air drawn into the compartment 12 may be separated from the exhausted heat air to avoid turbulent flow.
  • a lamp comprising a housing 1, a heat sink 2, a fan 6 and a light-emitting element 4 is disclosed according to a second embodiment of the invention.
  • the fan 6 also includes two sides 60a and 60b, a frame 61 and a plurality of assembly portions 62.
  • the frame 61 further includes a separation portion 63 which is an annual plate extending outwards from an outer circumferential wall of the frame 61.
  • the separation portion 63 includes an outer periphery preferably covering the upper edge 211 of the lateral wall 21.
  • the external air when the fan 6 rotates in a counterclockwise direction, the external air may be drawn into the compartment 12 via the at least one second air channel 25 and then expelled from the compartment 12 via the first air channels 24.
  • the external air when the fan 6 rotates in a clockwise direction, the external air may be drawn into the compartment 12 via the first air channels 24 and then expelled from the compartment 12 via the at least one second air channel 25.
  • the separation portion 63 may guide the air in the first air channels 24 and the at least one second air channel 25 to pass through the fan 6 only through the sides 60a and 60b, preventing the turbulent flow from occurring.
  • a lamp comprising a housing 1', a heat sink 7, a fan 6 and a light-emitting element 4 is disclosed according to a third embodiment of the invention.
  • the housing 1' also includes an opening end 11' and compartment 12'.
  • the heat sink 7 also includes a lateral wall 71, an upper edge 711, a lower edge 712, a fixing portion 713, a base 72, a first face 721, a second face 722, a protrusion 723, a plurality of first connection members 73, a plurality of first air channels 74, at least one second air channel 75, a second connection member 76 and an outer ring portion 77.
  • the housing 1' further includes at least one through-hole 13'.
  • the housing 1' includes a plurality of through-holes 13'. Based on this, when the air passes through the at least one second air channel 75, the through-holes 13' may allow extra air to flow into or out of the at least one second air channel 75, providing better cooling efficiency and reducing the noise generated by turbulent flow.
  • a portion of the lateral wall 71 adjacent to the lower edge 712 is designed to gradually extend away from a center of the lateral wall 71, increasing the air throughput of the first air channels 74.
  • the heat generated by the light-emitting element 4 may be rapidly dispelled by facilitating the ventilation of the lamp.
  • service life of the lamp is prolonged.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP20100010466 2010-05-25 2010-09-24 Lampe und Wärmesenke dafür Not-in-force EP2390564B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW099116734A TWI408311B (zh) 2010-05-25 2010-05-25 燈具及其散熱器

Publications (3)

Publication Number Publication Date
EP2390564A2 true EP2390564A2 (de) 2011-11-30
EP2390564A3 EP2390564A3 (de) 2013-06-26
EP2390564B1 EP2390564B1 (de) 2015-05-06

Family

ID=44584784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100010466 Not-in-force EP2390564B1 (de) 2010-05-25 2010-09-24 Lampe und Wärmesenke dafür

Country Status (3)

Country Link
EP (1) EP2390564B1 (de)
JP (1) JP5156071B2 (de)
TW (1) TWI408311B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014091369A1 (en) * 2012-12-13 2014-06-19 Koninklijke Philips N.V. Warm dimming light emitting arrangement
US9557631B2 (en) 2013-02-26 2017-01-31 Ricoh Company, Ltd. Light source unit and image projection apparatus including light source unit
WO2018120847A1 (zh) * 2016-12-30 2018-07-05 广州市浩洋电子股份有限公司 螺旋导风装置及设有该螺旋导风装置的舞台灯散热系统
CN117704339A (zh) * 2024-01-27 2024-03-15 广州申禾舞台灯光设备有限责任公司 舞台灯具的散热装置及舞台灯具

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KR101319486B1 (ko) * 2012-01-11 2013-10-17 선온웰스 일렉트릭 머신 인더스트리 컴퍼니 리미티드 램프
JP5910144B2 (ja) * 2012-02-15 2016-04-27 岩崎電気株式会社 光源ユニット
JP2013211200A (ja) * 2012-03-30 2013-10-10 Mitsubishi Chemicals Corp 照明装置
KR101912382B1 (ko) * 2012-04-13 2018-10-26 엘지이노텍 주식회사 조명 장치
KR101414650B1 (ko) * 2012-05-09 2014-07-03 엘지전자 주식회사 조명 장치
KR101455083B1 (ko) 2012-08-10 2014-10-28 삼성전자주식회사 조명 장치
JP6083204B2 (ja) * 2012-11-19 2017-02-22 セイコーエプソン株式会社 プロジェクター
CN105889794A (zh) * 2014-10-04 2016-08-24 平湖铱能新能源有限公司 一种新型塑包铝led球泡灯
CN104501000B (zh) * 2014-11-25 2016-05-11 东莞市闻誉实业有限公司 带有叶轮的led灯
JP6839929B2 (ja) * 2016-05-11 2021-03-10 三菱電機株式会社 照明装置

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US7144140B2 (en) * 2005-02-25 2006-12-05 Tsung-Ting Sun Heat dissipating apparatus for lighting utility
WO2008036596A1 (en) * 2006-09-18 2008-03-27 Cree Led Lighting Solutions, Inc. Lighting devices, lighting assemblies, fixtures and methods using same
JP2008198478A (ja) * 2007-02-13 2008-08-28 Daiwa Light Kogyo:Kk Ｌｅｄ照明装置
US20080212333A1 (en) * 2007-03-01 2008-09-04 Bor-Jang Chen Heat radiating device for lamp
JP4832343B2 (ja) * 2007-03-14 2011-12-07 京セラ株式会社 発光装置
DE102007040444B8 (de) * 2007-08-28 2013-10-17 Osram Gmbh LED-Lampe
WO2009040703A2 (en) * 2007-09-27 2009-04-02 Philips Intellectual Property & Standards Gmbh Lighting device and method of cooling a lighting device
CN101251246A (zh) * 2008-03-24 2008-08-27 东莞勤上光电股份有限公司 Led灯具及其散热方法
CN101566326B (zh) * 2008-04-23 2012-09-19 富准精密工业(深圳)有限公司 照明装置及其光引擎
JP2010153198A (ja) * 2008-12-25 2010-07-08 Nec Lighting Ltd 照明器具
TWI376481B (en) * 2009-10-13 2012-11-11 Sunonwealth Electr Mach Ind Co Lamp
JP5578900B2 (ja) * 2010-03-19 2014-08-27 京セラ株式会社 照明装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014091369A1 (en) * 2012-12-13 2014-06-19 Koninklijke Philips N.V. Warm dimming light emitting arrangement
US9557631B2 (en) 2013-02-26 2017-01-31 Ricoh Company, Ltd. Light source unit and image projection apparatus including light source unit
WO2018120847A1 (zh) * 2016-12-30 2018-07-05 广州市浩洋电子股份有限公司 螺旋导风装置及设有该螺旋导风装置的舞台灯散热系统
US10837632B2 (en) 2016-12-30 2020-11-17 Guangzhou Haoyang Electronic Co., Ltd (Cn) Spiral air guide device and stage light heat dissipation system provided with the spiral air guide device
CN117704339A (zh) * 2024-01-27 2024-03-15 广州申禾舞台灯光设备有限责任公司 舞台灯具的散热装置及舞台灯具

Also Published As

Publication number Publication date
JP5156071B2 (ja) 2013-03-06
JP2011249304A (ja) 2011-12-08
EP2390564A3 (de) 2013-06-26
EP2390564B1 (de) 2015-05-06
TW201142200A (en) 2011-12-01
TWI408311B (zh) 2013-09-11

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