EP2802813A1 - Heat dissipation device and illumination apparatus comprising the heat dissipation device - Google Patents
Heat dissipation device and illumination apparatus comprising the heat dissipation deviceInfo
- Publication number
- EP2802813A1 EP2802813A1 EP13723690.7A EP13723690A EP2802813A1 EP 2802813 A1 EP2802813 A1 EP 2802813A1 EP 13723690 A EP13723690 A EP 13723690A EP 2802813 A1 EP2802813 A1 EP 2802813A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fins
- heat dissipation
- dissipation device
- section
- illumination apparatus
- 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
Links
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
- F21V29/70—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
- F21V29/773—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 the planes containing the fins or blades having the direction of the light emitting axis
-
- 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
- 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
- F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
-
- 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
- F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
-
- 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
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
-
- 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
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
Definitions
- the present invention relates to a heat dissipation device for an illumination apparatus.
- the present invention also relates to an illumination apparatus comprising the heat dissipation device.
- LED retrofit lamps of the types such as MR16, PARI 6 , PAR20, Classic A and Classic B are seethingly finding the way of re ⁇ placing other traditional illumination apparatus such as in- candescent and fluorescent lamps because they can offer the benefits of energy saving, small size and long lifetime.
- LED package itself can reach high efficiency, such as 1401m/W for cold white and 901m/W for warm white and they are supposed to have a long lifetime as to 50,000 hours, but when the LED is integrated into a retro ⁇ fit lamp together with an LED driver, a thermal management device and an optical component, the efficiency and lifetime of the retrofit lamp are highly dependent upon how to design the driver, heat dissipation device and optical component.
- a good heat dissipation device design should be capable of providing favorable local air flow conditions, good radiation between surfaces, low material cost and sim ⁇ pler and easier manufacturing.
- heat dissipation devices are designed to have an increased heat dissipation surface area by using a larger number of fins within the form factor limitation.
- a large number of sheetlike fins are disposed outside the base of the heat dissipa ⁇ tion device, so as to obtain the largest possible contact area with the convectional air.
- the heat dissipation device of this type has an obvious defect, viz. having a relatively larger volume, and reducing air convection among the fins.
- the fins or design fins with various special shapes which, however, reduces, to some extent, the contact area of the fins with the convectional air, and reduces the heat dis ⁇ sipation performance of the heat dissipation device.
- the fins of the above type have a complicated struc ⁇ ture, are not easy to manufacture, and increase the manufac ⁇ ture complexity and cost of the heat dissipation device.
- the pure sheet-like heat dissipation device is easier to manufacture, and has a low cost. However, it has a serious defect, viz.
- the present invention provides a heat dissipation device, which has a simple structure, is easy to manufacture, has a low cost, can effectively avoid the formation of a thermal boundary layer on the surfaces of the fins of the heat dissipation device, and has a relatively lower thermal resistance and superior heat dissipation performance.
- the present invention also provides an illumination apparatus comprising such heat dissipation device.
- the illumination apparatus according to the present invention has a simple appearance, a low cost and superior heat dissipation performance.
- the first object of the present invention is accomplished via a heat dissipation device for an illumination apparatus, the heat dissipation device comprising: a base comprising a first section and a second section provided in a longitudinal di ⁇ rection, and a heat dissipation structure, and the heat dis ⁇ sipation structure comprises a plurality of first fins dis ⁇ tributed on a circumferential surface of the first section and a plurality of second fins distributed on a circumferen ⁇ tial surface of the second section, and an circumferential angular position of the first fin is different from an circumferential angular position of the second fin.
- the convectional air deflects when flow ⁇ ing over the surfaces of the first fins and the second fins, which thereby eliminates the possibility of forming a thermal boundary layer on the surfaces of the fins, and improves the heat dissipation performance of the heat dissipation device.
- the first section and the second section are sequentially arranged in the longitudinal direction of the base.
- the first fins disposed in the first section and the second fins disposed in the sec- ond section are also sequentially arranged in the longitudi ⁇ nal direction of the base, and the first fins and the second fins can be arranged to partially overlap each other or not overlap each other.
- the first fins extend in the longitudinal direc- tion over the first section
- the second fins extend in the longitudinal direction over the second section.
- the first fins and the second fins are arranged without overlapping each other, and after flowing over the fins in the first section or the second section, the convectional air changes its flowing direction by the fins in the second sec ⁇ tion or the first section, which thereby effectively reduces the risk of forming a thermal boundary layer on the fins.
- two adjacent first fins define a first convection region
- two adjacent second fins define a second convec- tion region, wherein air from the first convection region or the second convection region can be separated by the second fins or the first fins.
- the adjacent fins form the regions in which the convectional air flows, the flowing direction of the convectional air flowing over the regions will be changed by the fins that define other convection regions, which thereby effectively reduce the risk of forming a thermal boundary layer on the fins.
- the heat dissipation structure further com ⁇ prises a connection structure such that a flowing channel is defined between the first convection region and the second convection region.
- the connection structure partially connects free ends of the first fins in the longitudinal direc ⁇ tion with free ends of the second fins in the longitudinal direction.
- the connection structure serves the function of connecting and supporting the first fins and the second fins, and improves, to some extent, the overall appearance of the heat dissipation device.
- connection structure comprises a plurality of connection fins, wherein each of the first fins is connected with two adjacent second fins through connection fins.
- connection fins more or less disturb the convec- tional air, and thereby further reduce the risk of forming a thermal boundary layer on the fins.
- connection fins further enlarge the contact area between the heat dissipation device and the convectional air, and enhance, to some extent, the heat dissipation performance of the heat dissipation device.
- connection fins are connected to a side of the free ends of the first fins and the second fins facing away from the base.
- a channel is formed in the region in which the first fins and the second fins are con ⁇ nected with each other, and the channel is jointly defined by the first fins, the second fins, the connection fins and the base .
- the first fins, the sec- ond fins and the connection structure are made in one piece ,
- the heat dissipation device is made of a metal mate ⁇ rial, and is made by a die casting process.
- the heat dissipation device is made of a metal material having high thermal conductive performance, for example, aluminum.
- the heat dissipation device is made of a thermal conductive plastic, and is made by an injection molding proc ⁇ ess.
- the thermal conductive plastic is light and can be molded into various forms according to the design require- ments.
- the other object of the present invention is accomplished via an illumination apparatus, comprising the heat dissipation device of the above type.
- the illumination apparatus accord ⁇ ing to the present invention has good appearance and superior heat dissipation performance.
- the illumination apparatus according to the pre ⁇ sent invention further comprises an LED light engine and a driver for driving the LED light engine, the LED light engine and the driver being accommodated in the heat dissipation de- vice.
- LED light engines are widely used in the illumination apparatus as they have the advantages of high luminous effi ⁇ ciency, low power consumption, long lifespan, and so on.
- Fig. 1 is a schematic diagram of a heat dissipation device according to the first embodiment of the present invention
- Fig. 2 is a schematic diagram of the heat dissipation device according to the second embodiment of the present invention
- Fig. 3 is a top view of the heat dissipation device shown in
- Fig. 4 is a flow trend diagram of convectional air on the heat dissipation device according to the present invention.
- Fig. 1 is a schematic diagram of the heat dissipation device 100 according to the first embodiment of the present inven ⁇ tion.
- the heat dissipation device 100 according to the present invention comprises a base 1 comprising a first section A and a second section B provided in a longitudinal direction, and a heat dissipation structure 2, and the heat dissipation structure 2 comprises a plurality of first fins 21 distributed on a circumferential surface of the first section A and a plurality of second fins 22 distributed on a circumferential surface of the second section B, and an circumferential angular position of the first fin 21 is different from an circumferential angular po ⁇ sition of the second fin 22.
- the first fins 21 and the second fins 22 extend in the longi- tudinal direction of the base 1. However, they are not con ⁇ nected with each other, but are arranged in a staggered man ⁇ ner, which is equivalent to rotating the first section A carrying the first fins 21 at a predetermined angle with respect to the second section B carrying the second fins 22, such that the first fins 21 and the second fins 22 are staggered with respect to each other.
- the first fins 21 and the second fins 22 are staggered with respect to each other.
- the first fins 21 extend in the longitudinal direction over the first section A, and the second fins 22 extend in the longitudinal direction over the second section B, and seen in the circumferential direction, the first fins 21 and the second fins 22 do not overlap each other.
- the first fins 21 can extend over the first section A and par- _
- first fins 21 tially enter into the second section B
- second fins 22 can extend over the second section B and partially enter into the first section A, such that the first fins 21 and the second fins 22 partially overlap.
- two adjacent first fins 21 define a first convection region C
- two ad ⁇ jacent second fins 22 define a second convection region D, wherein air from the first convection region C or the second convection region D can be separated by the second fins 22 or the first fins 21.
- the adjacent fins form the regions in which the convectional air flows, the flowing direction of the convectional air flowing over the regions will be changed by the fins that define other convection regions, which thereby effectively reduce the risk of forming a thermal boundary layer on the fins.
- Fig. 2 is a schematic diagram of the heat dissipation device 100 according to the second embodiment of the present inven ⁇ tion.
- the connection structure partially connects free ends of the first fins 21 in the longitudinal direction with free ends of the second fins 22 in the longi ⁇ tudinal direction.
- connection structure comprises a plurality of connection fins 23, wherein each of the first fins 21 is connected with two adjacent second fins 22 through two connection fins 23. More ⁇ over, the connection fins 23 are connected to a side of the free ends of the first fins 21 and the second fins 22 facing away from the base 1.
- Fig. 3 is a top view of the heat dissipation device 100 shown in Fig. 2.
- a flowing channel between the first convection region C and the second convec ⁇ tion region D is formed in the region in which the first fins 21 and the second fins 22 are connected with each other, and the flowing channel is jointly defined by the first fins 21, the second fins 22, the connection fins 23 and the base 1.
- the first fins 21, the second fins 22 and the connection sheets 23 are made in one piece with the base 1.
- the heat dissipation de ⁇ vice 100 can be made of a metal material by a die casting process.
- the heat dissipation device 100 can also be made of a thermal conductive plastic by an injection molding process.
- Fig. 4 is a flow trend diagram of convectional air on the heat dissipation device 100 according to the present inven- tion.
- the convectional air from the outside flows from the bottom of the heat dissipa ⁇ tion device 100, viz. the second section B of the heat dissi ⁇ pation device 100, to the first section A.
- the convectional air flows over the surfaces of the second fins 22 in the sec- ond convection region D defined by two adjacent second fins 22, after the convectional air flows outside the second con ⁇ vection region D, the first fins 21 and the connection fins 23 disturb the convectional air and changes the flowing di ⁇ rection of the convectional air.
- the convectional air whose flowing direction has been changed subsequently flows into the first convection region C defined by two adjacent first fins 21.
- the risk of forming a thermal boundary layer on the surfaces of the sheet-like fins is reduced, and thereby, the heat dissipation performance of the heat dissipation de- vice 100 is enhanced.
- the illumination apparatus comprising the heat dissipation device 100 according to the present invention is not shown in the figures.
- the illumination apparatus according to the present in- vention comprises an LED light engine and a driver for driv ⁇ ing the LED light engine, the LED light engine and the driver being accommodated in the heat dissipation device 100.
- the illumination apparatus according to the present invention can also employ light sources of other types and the corresponding electrical components.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210149646.7A CN103423721B (en) | 2012-05-14 | 2012-05-14 | Heat abstractor and the lighting device with the heat abstractor |
PCT/EP2013/058925 WO2013171062A1 (en) | 2012-05-14 | 2013-04-29 | Heat dissipation device and illumination apparatus comprising the heat dissipation device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2802813A1 true EP2802813A1 (en) | 2014-11-19 |
EP2802813B1 EP2802813B1 (en) | 2018-10-31 |
Family
ID=48468224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13723690.7A Active EP2802813B1 (en) | 2012-05-14 | 2013-04-29 | Heat dissipation device and illumination apparatus comprising the heat dissipation device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2802813B1 (en) |
CN (1) | CN103423721B (en) |
WO (1) | WO2013171062A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104654255A (en) * | 2013-11-22 | 2015-05-27 | 苏州承源光电科技有限公司 | Radiator for LEDs |
CN109340612B (en) * | 2018-09-04 | 2021-01-05 | 东莞市闻誉实业有限公司 | Lighting lamp |
CN111473300A (en) * | 2020-03-23 | 2020-07-31 | 宁波市富来电子科技有限公司 | Novel automobile L ED tail lamp combination and manufacturing method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2724201Y (en) * | 2004-07-06 | 2005-09-07 | 陈万添 | Heat radiator structure |
CN201093431Y (en) * | 2007-08-07 | 2008-07-30 | 东莞市金杲电子贸易有限公司 | LED light fitting |
CN201310855Y (en) * | 2008-12-10 | 2009-09-16 | 上海三思电子工程有限公司 | Heat-emission lamp holder and LED pixel lamp |
US8491162B2 (en) * | 2009-01-14 | 2013-07-23 | Zhongshan Weiqiang Technology Co., Ltd. | LED lamp |
US8593040B2 (en) * | 2009-10-02 | 2013-11-26 | Ge Lighting Solutions Llc | LED lamp with surface area enhancing fins |
US8324835B2 (en) * | 2011-02-11 | 2012-12-04 | Soraa, Inc. | Modular LED lamp and manufacturing methods |
US9335101B2 (en) * | 2011-04-11 | 2016-05-10 | Molex, Llc | LED lamp |
-
2012
- 2012-05-14 CN CN201210149646.7A patent/CN103423721B/en active Active
-
2013
- 2013-04-29 WO PCT/EP2013/058925 patent/WO2013171062A1/en active Application Filing
- 2013-04-29 EP EP13723690.7A patent/EP2802813B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2013171062A1 (en) | 2013-11-21 |
EP2802813B1 (en) | 2018-10-31 |
CN103423721A (en) | 2013-12-04 |
CN103423721B (en) | 2018-02-13 |
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