CN101828073A - Heat dissipating device for LED source and LED source - Google Patents

Heat dissipating device for LED source and LED source Download PDF

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Publication number
CN101828073A
CN101828073A CN200980100067A CN200980100067A CN101828073A CN 101828073 A CN101828073 A CN 101828073A CN 200980100067 A CN200980100067 A CN 200980100067A CN 200980100067 A CN200980100067 A CN 200980100067A CN 101828073 A CN101828073 A CN 101828073A
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CN
China
Prior art keywords
reflector
light source
dissipating housing
heat dissipating
led light
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.)
Pending
Application number
CN200980100067A
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Chinese (zh)
Inventor
黄斌
Original Assignee
黄斌
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
Priority to CN200810216040.4 priority Critical
Priority to CNA2008102160404A priority patent/CN101373063A/en
Application filed by 黄斌 filed Critical 黄斌
Priority to PCT/CN2009/073350 priority patent/WO2010022630A1/en
Publication of CN101828073A publication Critical patent/CN101828073A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/502Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77Cooling 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
    • F21V29/773Cooling 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00Protecting lighting devices from damage
    • F21V15/01Housings, e.g. material or assembling of housing parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

The invention belongs to the radiation device technology field, relates to a heat dissipation apparatus for LED light source with small size and high power (such as a high power MR16 spotlight) and a LED light source having the heat dissipation apparatus. The LED light source heat dissipation apparatus comprises a cup body with a luminescent LED disposed inside; the inner wall of the cup body is used for reflection and the outer wall of the cup body is used for heat dissipation. The apparatus is characterized in that: it also comprises a cover body disposed outside the cup body; a cavity used for ventilation is disposed between cover body and the outer wall of the cup body; vents in communication with the cavity are formed on the upper and lower portion of the cup body. The heat dissipation apparatus also comprises a turbine fan driven by motor; the fan is supported on the vent by a fan bearing holder for accelerating the airflow. The heat dissipation apparatus of the invention completely solves the problem of heat dissipation of the LED light source with small size and high power; and achieves the advantages of good heat dissipation effect, long service life, energy conservation and environmental protection.

Description

The heat abstractor of led light source and led light source
[technical field]
The invention belongs to the radiating element technical field, relate to the heat abstractor of a kind of small size high-power LED light source (for example high-power MR16LED shot-light) and led light source with this heat abstractor.
[background technology]
Though led light source is a cold light source, but also can produce certain heat during its energising work, and these heats are can't distribute timely the time, the temperature of led light source is raise gradually, and the temperature range of the steady operation of LED (light emitting diode) is-40 ℃~80 ℃, heat can not effectively distribute, and then can influence the properties of product and the service life of led light source greatly.
MR16 LED shot-light is a kind of light source of undersized band multiaspect reflector, lower powered MR16LED shot-light caloric value is smaller, so need not to consider the heat dissipation problem of LED shot-light, the MR16LED shot-light reflector smooth with the common back side can satisfy its heat sinking function.And along with the power of MR16LED shot-light constantly increases, its caloric value also constantly increases, under the constant situation of its size, the surface temperature of LED shot-light is also raising gradually, when temperature is higher than its operating temperature, then can influence LED shot-light job stability and service life, just need to consider LED shot-light heat dissipation problem this time, traditional way is at present, the back side at reflector is provided with metal fin, the metal fin and the tubaeform reflector back side are tightly connected by heat conductive silica gel or directly metal fin and tubaeform reflector are made an integral body, reach good heat-radiation effect by the metal fin good performance of heat dissipation, the cooling surface area that increases metal fin can increase radiating effect, and its main developing direction is, metal fin is arranged to a plurality of very thin fins; Increase the surface area of fin; Adopt reasonable copper of heat dispersion or aluminium as heat sink material etc.
A kind of MR16 shot-light that has been 095220939 Taiwan patent disclosure as application number comprises: a Lamp cup is to be horn-like and to comprise and dwindle end, an and bellend that this bellend also is concaved with a containing groove; One base is that this that be mounted on this Lamp cup dwindles end, and this base also comprises two power supply contacts; One LED source is to be mounted in this containing groove of this Lamp cup; One light source driving circuit plate is to be mounted in this containing groove of this Lamp cup, and this light source driving circuit plate also is electrically connected to this LED source respectively, reaches this two power supply contact of this base; One lens are to be mounted in this containing groove of this Lamp cup and to be positioned at this LED source top; And a lampshade, be this bellend that is covered on this Lamp cup.Described lampshade adopts metal material to make, and comprises and have most radiating fins, and lampshade comprises the cover body and the cover end, and described cover body uses as reflector simultaneously, is used for led light source is enclosed in cover body at the bottom of the described cover.
And for example the patent No. is the heat abstractor that CN200940816Y China utility model patent discloses a kind of LED projecting lamp (being shot-light), and it comprises the radiator of speculum (being reflector), lampshade and tubular.Speculum is positioned at the dented space of radiator, and a plurality of fins are arranged on the periphery of radiator, and fin adopts metal material to form an integral body with the chamber that forms in the central.For better radiating effect is provided, in the central bore that fin and speculum surround, fill conduction material all around.
All be by the purpose that fin reaches heat radiation is set in above-mentioned patent, the size of different just fins and what problem, when the power of LED shot-light is increased to 6W when above, under the restricted situation of MR16LED shot-light diameter, only depend on the area of dissipation that increases fin can not satisfy the needs of heat radiation.This be because, fin heat radiation is the mode distribute heat in air by radiation, after the fin ambient air is conducted heating, the usefulness of fin heat radiation will reduce greatly, be unfavorable for distributing of heat.
Do not increasing under the situation of fan heat radiation, be a difficult problem that needs to be resolved hurrily in the industry to the heat radiation of small size high-power LED light source always.
[summary of the invention]
Purpose of the present invention is exactly in order to solve the problems of the technologies described above, utilize the principle of stack effect to propose a kind of heat abstractor of new led light source, heat abstractor of the present invention has solved the heat dissipation problem of small size high-power LED light source (as the MR16LED shot-light) fully, has good heat dissipation effect, characteristics such as longevity, energy-saving and environmental protection.Owing to adopted new heat abstractor, the longer service life of MR16LED shot-light reached more than 35000 hours, and power can reach more than the 20W, and its luminous efficiency can reach 205 lumens/watt.
Concrete technical scheme of the present invention is as follows:
A kind of heat abstractor of led light source comprises
Flaring reflector, described reflector inwall is used for reflective, and described reflector outer wall is used for heat radiation;
Be socketed on described reflector heat dissipating housing outer and that removably connect with described reflector;
Be provided with the cavity that is used to ventilate between described heat dissipating housing inwall and the reflector outer wall, two relative radiating surfaces of described heat dissipating housing are provided with the blow vent that is communicated with described cavity.
The described mode of removably connecting is multiple, as clamping, by the screw connection or by being threaded or the like.
The described cavity that is used to ventilate can be the integral cavity that described heat dissipating housing inwall and reflector outer wall are surrounded, and also the cavity that described heat dissipating housing inwall and reflector outer wall are surrounded is subdivided into several capillary channels, and each capillary channel is an areola.
The radiating surface of described heat dissipating housing is meant the contact-making surface of heat dissipating housing and outside air, on two relative radiating surfaces, blow vent is set, can constitute the structural model of " stack effect ", hot-air is in the blow vent diffusion of up radiating surface, and cold air replenishes into from the blow vent of down radiating surface.
The bottom of described heat dissipating housing is circular, removably connects with the horn mouth of described reflector, is provided with blow vent in described heat dissipating housing bottom; Described heat dissipating housing top is circular, is provided with to be used to the through hole that mains connection passed and be used to ventilate.
The bottom interior wall of described heat dissipating housing is provided with internal thread, the bell-mouthed outer of described reflector is provided with external screw thread, described heat dissipating housing is fixedlyed connected by screw thread with reflector, and the described blow vent that is positioned at heat dissipating housing bottom is a plurality of circular apertures, be arranged on the heat dissipating housing bottom around.
Described heat dissipating housing is columnar hollow cavity, is provided with around the inwall upper end of described heat dissipating housing and radially vertically is arranged with a plurality of fins, and the slit that is used to ventilate is left on the top of described fin.
Described heat dissipating housing is flaring hollow cavity, at the outer wall peripheral shaft of described heat dissipating housing to vertically being arranged with a plurality of radiating fins.
The length of described heat dissipating housing is 26mm~120mm.
Be provided with a plurality of radiating fins around the outer wall of described reflector.
Described radiating fin radially vertically is arranged in the outer wall of described reflector.
Fin around the described inboard, upper end that is positioned at heat dissipating housing aligns with the described radiating fin arrangement that is positioned at around the reflector outer wall.
Described blow vent is relative with the slit between described two fins.
The heat abstractor of described led light source comprises also and is fixedly connected on the bell-mouthed circular lampshade of described reflector that described circular lampshade middle part is provided with light-passing board.
Be provided with annular fin around the described circular lampshade, this annular fin is fixedlyed connected with the flare end of described reflector, and described annular fin contacts with described heat dissipating housing end face.
The present invention also provides a kind of led light source, described led light source comprises the supply unit of LED and driving LED work, it is characterized in that described led light source also comprises aforesaid heat abstractor, the supply unit of described LED and driving LED work is arranged on described heat dissipating housing inside.
[Figure of description]
Fig. 1 is a perspective exploded view of the present invention;
Fig. 2 is the perspective view of heat dissipating housing of the present invention;
Fig. 3 is the vertical view of heat dissipating housing of the present invention;
Fig. 4 is the generalized section of heat dissipating housing of the present invention;
Fig. 5 is the perspective view of reflector of the present invention;
Fig. 6 is the generalized section of reflector of the present invention;
Fig. 7 is the vertical view of reflector of the present invention;
Fig. 8 is the perspective view of lampshade of the present invention;
Fig. 9 is the generalized section of lampshade of the present invention;
Figure 10 is the vertical view of lampshade of the present invention.
Wherein, 1, reflector; 11, reflector inwall; 12, reflector outer wall; 121, the radiating fin of reflector; 13, horn mouth; 131, reflector internal thread; 132, reflector external screw thread; 14, loudspeaker tail; 141, circular open; 2, heat dissipating housing; 21, cylindrical cavity is near an end of described Circular shape lampshade; 211, heat dissipating housing internal thread; 22, heat dissipating housing inwall; 221, inwall upper end; 2211, fin; 23, heat dissipating housing outer wall; 231, the radiating fin of heat dissipating housing; 24, circular aperture; 3, lampshade; 31, light-passing board; 32, annular thermal component; 321, annular fin; 322, annular fin joint; 3221, screw thread.
[specific embodiment]
The present invention relates to a kind of heat abstractor of small size high-power LED light source, is that example is done elaboration and explanation to this heat abstractor with the MR16LED shot-light in an embodiment.
As shown in Figure 1, a kind of heat abstractor of MR16LED shot-light, comprise, comprise a flaring reflector 1, one is socketed on the circular lampshade 3 that described reflector 1 heat dissipating housing 2 and outer and that fixedly connected with the horn mouth 11 of described reflector is fixedly connected on the horn mouth 11 of described reflector 1, described circular lampshade 3 central authorities are provided with light-passing board 31, be used for transmitted ray and sealing LED, be provided with annular thermal component 32 around the described circular lampshade 3, this annular thermal component 32 is fixedlyed connected with the horn mouth 11 of described reflector 1, and described annular thermal component 32 contacts with described heat dissipating housing 2.
Shown in Fig. 8-10, described annular thermal component 32 comprises that an annular fin 321 and is provided with the annular fin joint 322 of screw thread 321, the vertical connection of edge of the edge of described annular fin joint 322 and described annular fin 321, described annular fin joint 322 is connected with the horn mouth 11 of described reflector 1 by the screw thread 3221 that is provided with on it, and its junction seals by thermal grease.
Shown in Fig. 5-7, the inwall 11 of described tubaeform reflector 1 is for to be used to reflect the luminous smooth mirror surface of LED, and the radiating surface that outer wall 12 is made for metal material, described metal material are aluminium alloy.Be provided with a plurality of radiating fins 121 around the outer wall 12 of described reflector 1, described radiating fin 121 is radially vertically evenly distributed to loudspeaker tail 14 along the horn mouth 13 of reflector 1.The inboard of the horn mouth 13 of described reflector 1 is provided with reflector internal thread 131, and arranged outside has reflector external screw thread 132, and the internal thread 131 of described reflector 1 is fixedlyed connected with screw thread 3221 threaded engagement of described Circular shape lampshade 3.The loudspeaker tail 14 of described reflector 1 offers circular opening 141, be used to install the supply unit of LED and driving LED work, the supply unit afterbody of described driving LED work is drawn two stitch, be connected described power supply adaptor output dc low-voltage electric current with power supply adaptor by described two stitch (figure does not show).
Shown in Fig. 2-4, the cavity that described heat dissipating housing 2 is made for metal material, described metal material are aluminium alloy.Shown in cylindrical cavity be provided with heat dissipating housing internal thread 211 near the inboard of an end 21 of described Circular shape lampshade 3, described reflector is by heat dissipating housing internal thread 211 and described reflector external screw thread 132 threaded engagement, and described reflector 1 is fixedlyed connected by described threaded engagement with described heat dissipating housing 2.The inwall 22 of described heat dissipating housing 2 is a well shape, be used to cooperate the diminishing loudspeaker profile of described reflector 1, be provided with around the inwall upper end 221 of described heat dissipating housing 2 and radially vertically be arranged with a plurality of fins 2211, the slit that is used to ventilate is left on the top of described fin 2211; The outer wall 23 of described heat dissipating housing 2 is cylindrical, and is provided with a plurality of radiating fins 231, and described fin is for axially vertically evenly distributed.Be provided with a plurality of circular apertures 24 near described heat dissipating housing internal thread 211, described circular aperture is through inside and outside two walls of described heat dissipating housing 2, and described circular aperture is arranged between two radiating fins 231.
As shown in Figure 1, outside described heat dissipating housing 2 is socketed on described reflector 1, and when being threaded, be formed with cavity between described heat dissipating housing 2 inwalls 22 and reflector 1 outer wall 12, this cavity is venting channels, and the two-port of described venting channels is respectively the space that the circular aperture 24 that is arranged on the described heat dissipating housing 2 and heat dissipating housing 2 and reflector 1 form.
Operation principle of the present invention is, when the LED shot-light is worked, can produce heat, heat conducts the fin to the outer wall of reflector, make the fin heating of reflector outer wall, after being heated, fin makes the surrounding air heating, no matter how the LED shot-light is placed, its top at heat dissipating housing has slit or hole that hot-air is dispelled the heat away all the time, and the cold air that is arranged in this shot-light bottom replenishes into from the slit of heat dissipating housing bottom, constitute the structural model of " stack effect " like this, thereby quickened the convection current of air, make radiating effect will get well much than the passage or the slit that are not provided for convection current at two ends.
Utilize the principle of " stack effect ", we can very simply do some distortion to the foregoing description, as:
The connected mode of heat dissipating housing and reflector is transformed into clamping or fixedlys connected by screw, these on-link mode (OLM)s are and removably connect, and purpose is the installation for the aspect heat dissipating housing, especially when the length of heat dissipating housing has exceeded the length of reflector.
Be arranged to tubaeform heat dissipating housing or conical cavity, as long as guarantee ventilation member to be set at the two ends of cavity, i.e. passage or slit, and in cavity, form venting channels and get final product.
Can also do some distortion to passage or slit, can do circular, square, grid, pane shape etc.
Can also do some improvement to the foregoing description according to the principle of " stack effect " and " valley effect " simultaneously, as:
Increase the number or the size of the passage at heat dissipating housing two ends, the inwall of heat dissipating housing and the radiating fin of reflector are connected, make and form a plurality of vertical venting channels between heat dissipating housing and the reflector, and each of heat dissipating housing near near the circular aperture the screw thread all with the radiating fin of described reflector between the slit corresponding, the slit at the top of described heat dissipating housing also with the radiating fin of described reflector between the slit corresponding, make cold-hot air convection very smooth and easy and quick.
The present invention also provides a kind of led light source, described led light source comprises the supply unit of LED and driving LED work, it is characterized in that described led light source also comprises the as above described heat abstractor of embodiment, the supply unit of described LED and driving LED work is arranged on described heat dissipating housing inside.
Described led light source is after having used aforesaid heat abstractor, and radiating effect is strengthened greatly, and its maximum service rating is increased, and luminous efficiency also is improved.
For example in the standard led light source of MR16 model, the diameter of described led light source is 2 inches, and its operating power reaches as high as 20W, and luminous efficiency is up to 205 lumens/watt.
Need to prove; the foregoing description is support and the explanation to claim; it is not restriction to protection scope of the present invention; so as long as in design scope of the present invention, the distortion of the present invention being made based on " stack effect " principle and improving all within protection scope of the present invention.

Claims (13)

1. the heat abstractor of a led light source comprises
Flaring reflector, described reflector inwall is used for reflective, and described reflector outer wall is used for heat radiation;
Be socketed on described reflector heat dissipating housing outer and that removably connect with described reflector;
Be provided with the cavity that is used to ventilate between described heat dissipating housing inwall and the reflector outer wall, two relative radiating surfaces of described heat dissipating housing are provided with the blow vent that is communicated with described cavity.
2. the heat abstractor of led light source according to claim 1 is characterized in that, the bottom of described heat dissipating housing is circular, removably connects with the horn mouth of described reflector, is provided with blow vent in described heat dissipating housing bottom; Described heat dissipating housing top is circular, is provided with to be used to the through hole that mains connection passed and be used to ventilate.
3. the heat abstractor of led light source according to claim 2, it is characterized in that, the bottom interior wall of described heat dissipating housing is provided with internal thread, the bell-mouthed outer of described reflector is provided with external screw thread, described heat dissipating housing is fixedlyed connected by screw thread with reflector, the described blow vent that is positioned at heat dissipating housing bottom is a plurality of circular apertures, be arranged on the heat dissipating housing bottom around.
4. according to the heat abstractor of the arbitrary described led light source of claim 1-3, it is characterized in that, described heat dissipating housing is columnar hollow cavity, is provided with around the inwall upper end of described heat dissipating housing and radially vertically is arranged with a plurality of fins, and the slit that is used to ventilate is left on the top of described fin.
5. according to the heat abstractor of the arbitrary described led light source of claim 1-3, it is characterized in that described heat dissipating housing is flaring hollow cavity, at the outer wall peripheral shaft of described heat dissipating housing to vertically being arranged with a plurality of radiating fins.
6. the heat abstractor of led light source according to claim 4 is characterized in that, the length of described heat dissipating housing is 26mm~120mm.
7. the heat abstractor of led light source according to claim 6 is characterized in that, is provided with a plurality of radiating fins around the outer wall of described reflector.
8. the heat abstractor of led light source according to claim 7 is characterized in that, described radiating fin radially vertically is arranged in the outer wall of described reflector.
9. the heat abstractor of led light source according to claim 8 is characterized in that, the fin around the described inboard, upper end that is positioned at heat dissipating housing aligns with the described radiating fin arrangement that is positioned at around the reflector outer wall.
10. the heat abstractor of led light source according to claim 8 is characterized in that, described blow vent is relative with the slit between described two fins.
11. the heat abstractor of led light source according to claim 1 is characterized in that, the heat abstractor of described led light source comprises also and is fixedly connected on the bell-mouthed circular lampshade of described reflector that described circular lampshade middle part is provided with light-passing board.
12. the heat abstractor of led light source according to claim 11, it is characterized in that, be provided with annular fin around the described circular lampshade, this annular fin is fixedlyed connected with the flare end of described reflector, and described annular fin contacts with described heat dissipating housing end face.
13. led light source, described led light source comprises the supply unit of LED and driving LED work, it is characterized in that described led light source also comprises arbitrary described heat abstractor as claim 1-12, the supply unit of described LED and driving LED work is arranged on described heat dissipating housing inside.
CN200980100067A 2008-09-05 2009-08-19 Heat dissipating device for LED source and LED source Pending CN101828073A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN200810216040.4 2008-09-05
CNA2008102160404A CN101373063A (en) 2008-09-05 2008-09-05 Heat radiating device of long service life and energy-saving LED sending light
PCT/CN2009/073350 WO2010022630A1 (en) 2008-09-05 2009-08-19 Heat dissipating device for led source and led source

Publications (1)

Publication Number Publication Date
CN101828073A true CN101828073A (en) 2010-09-08

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CN200980100067A Pending CN101828073A (en) 2008-09-05 2009-08-19 Heat dissipating device for LED source and LED source

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CN (2) CN101373063A (en)
AU (1) AU2009278057A1 (en)
WO (2) WO2010025599A1 (en)

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