CN202972618U - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- CN202972618U CN202972618U CN201220579409XU CN201220579409U CN202972618U CN 202972618 U CN202972618 U CN 202972618U CN 201220579409X U CN201220579409X U CN 201220579409XU CN 201220579409 U CN201220579409 U CN 201220579409U CN 202972618 U CN202972618 U CN 202972618U
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- lighting device
- wall
- light source
- air
- back cover
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Abstract
The utility model provides a lighting device, comprising a rear shell, a heat dissipater and at least one LED (Light Emitting Diode) light source, wherein the heat dissipater comprises an internal wall, an external wall and multiple fins; the internal wall is basically shaped like a dish and is provided with an internal surface and an external surface; each LED light source is thermally coupled onto the internal surface of the heat dissipater; the external wall is provided with a main body part; the main body part is spaced from the internal wall in a fluid penetration way in the longitudinal direction of the lighting device and further intertwines the external surface of the internal wall circumferentially; the multiple fins are connected between the main body part of the external wall and the internal wall in a way of being mutually spaced, so that an air inlet passage is limited between every two fins; the rear shell is connected onto the main body part of the external wall of the heat dissipater; at least one air outlet passage is limited in the rear shell; and in such a way, during work, the ambient air inflows through the air inlet passage and the hot air generated after heat exchange flows out through the air outlet passage. With the adoption of the scheme, not only the heat conduction from each LED light source to the heat dissipater, but also the heat convection of air among the fins of the heat dissipater are provided; therefore, the thermal performance is better and the thermal resistance is lower; and meanwhile, the noise level is acceptable.
Description
Technical field
The utility model relates to a kind of lighting device.
Background technology
Many characteristics such as long and environmental friendliness due to energy-conservation, life-span of LED lamp, the LED lamp has been regarded as following illumination scheme.Yet present LED etc. still has its development of some drawbacks limit.The most serious shortcoming may be dispelled the heat exactly.Because its operating principle, LED chip produce a large amount of heat in the luminescence process of lamp.If these heats can not be shed in time, will affect widely due to optical attenuation the life-span of lamp.As a result, although these years in lower powered illumination the LED lamp obtain significant progress, how many LED but fails to have on the market of high lumen illumination improve.In order to reach high lumen output, another kind of scheme is to improve LED luminous efficacy (λ) as doing in the past few years.Yet regrettably, this luminous efficacy also has bottleneck and can not increase right.
In order to improve hot property, developed several method, for example, adopt the larger active cooling fan of heat-sinking capability or adopt large radiator.But still there are some problems.For active cooling, in order to process larger thermal force with larger heat-sinking capability, should use the large fan with higher Air Flow rate, but these large fans have inevitably brought not low noise.For passive cooling for, most important no more than the spreader surface area, compare with active cooling, for same heat is shed, should use the metal heat sink with large fin to increase its surface area.As a result, the form factor of lamp may be inconsistent with the standard profile that International Electrotechnical Commissio (International Electrotechnical Commission, IEC) is carried out, so light fixture adaptability is relatively poor.Simultaneously, large radiator also brings weight, safety and cost pressure problem.
In order to overcome these technical problems, the utility model will disclose a kind of lighting device of the radiator with compactness, and this lighting device has also overcome their shortcoming when having above-mentioned advantage.
The utility model content
In order to improve the hot property of LED lamp, the utility model discloses a kind of lighting device, it comprises: back cover, radiator and at least one LED light source, this radiator comprises: inwall, it is dish substantially, has inner surface and outer surface, and LED light source is thermally coupled on its inner surface; Outer wall, it has main part, main part lighting device vertically on fluid to connect ground spaced apart and circumferentially around the outer surface of inwall with inwall; A plurality of fins, its each interval turn up the soil between the main part that is connected to outer wall and inwall to be limited with between any two an air intake passage at a plurality of fins; Back cover is connected on the main part of outer wall of radiator, is limited with at least one air-out passage on it; By this, during work, surrounding air flows into via air intake passage, and the hot-air after heat exchange flows out via air-out passage.
Preferably, lighting device vertically on, the main part of outer wall is the reducing shape towards back cover.
Preferably, a plurality of fins end at the downstream edge of the main part of outer wall substantially.
Preferably, a plurality of fins are radially outstanding to central authorities from the downstream edge of the main part of outer wall.
Preferably, the inner surface of back cover forms container cavity, and container cavity accommodates light source drive at least so that air-out passage and air intake passage are separated, and also offers through hole on light source drive so that hot-air flows out via through hole and air-out passage successively.
Preferably, back cover forms container cavity, and container cavity accommodates the light source driven unit, and the light source driven unit occupies the wall part of back cover, and air-out passage is limited on the remainder of wall of back cover.
Preferably, air-out passage is near the opening end of back cover.
Preferably, inwall, outer wall and a plurality of fin are integrated.
More preferably, inwall, outer wall and a plurality of fin are metal.
Preferably, lighting device also comprises fan, and fan is arranged between radiator and back cover.
More preferably, the downstream edge of the outer surface of inwall, the main part of outer wall and the downstream end of a plurality of fins are formed with spatial accommodation jointly, and fan is arranged in spatial accommodation at least in part.
Lighting device of the present utility model has following characteristic:
(1) on the one hand, fin is connected by outer wall and can improve the heat conduction, on the other hand, strengthens cross-ventilation thereby the radiator with inner fins has formed the air inlet passage of low-resistance, that is, lighting device of the present utility model has been used hot conduction and thermal convection principle simultaneously; And
(2) according to the flow resistance larger principle of high noisy more under certain Air Flow rate, fin and the edge of wall are set to concordantly can realize lower air flow resistance and less noise in one embodiment.
By the utility model, can obtain following advantage:
1, the active cooling of the existing fan of technical scheme of lighting of the present utility model has again the passive cooling of radiator, existing LED light source has again the thermal convection current of air between the fin of radiator to the heat conduction of radiator, therefore, hot property is better and thermal resistance is lower, simultaneously, noise level is also acceptable;
2, with passive cooling the comparing of routine, the structure of the disclosed radiator of the utility model is compact, and whole weight can reduce by 50% or more, and simultaneously, cost also is minimized;
3, the disclosed lighting device of the utility model can satisfy the light fixture adaptability of standard to guarantee that it is good of International Electrotechnical Commissio better.
Description of drawings
In order to explain the utility model, its illustrative embodiments will be described with reference to the drawings hereinafter, in accompanying drawing:
Fig. 1 shows the exploded view of a kind of embodiment of lighting device of the present utility model;
Fig. 2 shows the perspective view of the radiator of lighting device of the present utility model shown in Figure 1;
Fig. 3 shows the perspective view of the radiator removal part material of Fig. 2;
Fig. 4 shows the perspective view of another kind of embodiment of the radiator of lighting device of the present utility model;
Fig. 5 shows the perspective view of the radiator removal part material of Fig. 4;
Fig. 6 shows the perspective view of the back cover of lighting device of the present utility model shown in Figure 1;
Fig. 7 shows the perspective view of another kind of embodiment of the back cover of lighting device of the present utility model;
Thermal convection current situation when a kind of embodiment that Fig. 8 shows lighting device of the present utility model works.
Similar features in different figure is by similar Reference numeral indication.
The specific embodiment
Fig. 1 shows the exploded view of the lighting device of a kind of embodiment of the present utility model.As shown in Figure 1, this lighting device 100 comprises back cover 102, light source drive 104, driver heat dissipation element 106, fan 108, radiator 110, LED light source 112, optical element 114.
Particularly, light source drive 104 can comprise drive circuit board and be arranged on electronic device on this drive circuit board one example such as electric capacity; Driver heat dissipation element 106 can be for comprising the heat sink of a plurality of grooves, and it can be arranged on the opposite side of drive circuit board, is used for passively to light source drive 104 heat radiations; Fan 108 is used for light source drive 104 is dispelled the heat on one's own initiative.When mounted, light source drive 104 and driver heat dissipation element 106 can be accommodated in back cover 102, and fan 108 can be installed to the downside of driver heat dissipation element 106.Radiator 110 can mechanically be coupled by the multiple choices mode with back cover 102 up, for example, can connect by buckle, also can connect by securing member, can also be connected with securing member by the dual-purpose buckle.This radiator 110 below couple by for example aluminum base circuit board and LED light source 112 heat, this LED light source 112 is electrically connected to light source drive 104 by this aluminum base circuit board, this belongs to prior art, does not repeat them here.Optical element 114 such as lens can be connected in various optionally modes the below of radiator 110.By this, back cover 102, radiator 110 and optical element 114 from top to bottom (vertically on) couple together and other devices of lighting device held.
Fig. 2 shows the perspective view of the radiator of lighting device of the present utility model shown in Figure 1.Fig. 3 shows the perspective view of the radiator removal part material of Fig. 2.
As shown in Figures 2 and 3, this radiator 110 is general integrally formed such as aluminium or copper etc. by the metal material of good heat dispersion performance.This radiator 110 comprises inwall 116, outer wall 118 and a plurality of fin 120.Wherein, this inwall 116 is dish substantially, have the base portion 116a of circular and from the downward outward extending edge part 116b of the circumferential edge of base portion 116a, inwall 116 defines inner surface 116c and outer surface 116d, LED light source 112 shown in Figure 1 can be thermally coupled on its inner surface 116c.Usually, aforementioned LED light source 112 is thermally coupled on the inner surface of base portion 116a of inwall 116.Outer wall 118 has main part 118a and marginal portion 118b, and this main part 118a is the shape of reducing gradually from top to bottom, lighting device vertically on fluid to connect ground spaced apart and circumferentially around the outer surface 116d of inwall 116 with inwall 116.More specifically, as seen from Figure 3, the main part 118a of this outer wall 118 circumferentially upper edge part 116b around this inwall 116, footpath upwards shrinks and extends beyond in the vertical the edge part 116b of inwall 116 gradually.Marginal portion 118b is formed on the circumferential edge of main part 118a and extends to form step structure diametrically and vertically.A plurality of fins 120 evenly are connected between the main part 118a of outer wall 118 and inwall 116 to be limited with between any two an air intake passage 122 at a plurality of fins 120 each other at interval.Further, these fins 120 end at the downstream edge place of the main part 118a of this outer wall 118 substantially, namely, these fins 120 are not from outer wall 118 top ends projections out, therefore, the final end of the downstream edge of main part 118a, fin 120 and base portion 116a have formed a spatial accommodation.
Fig. 4 shows the perspective view of another kind of embodiment of the radiator of lighting device of the present utility model.Fig. 5 shows the perspective view of the radiator removal part material of Fig. 4.
As shown in Figure 4 and Figure 5, this radiator 210 comprises inwall 216, outer wall 218 and a plurality of fin 220.Wherein, this inwall 216 is dish substantially, have the base portion 216a of circular and from the downward outward extending edge part 216b of the circumferential edge of base portion 216a, inwall 216 defines inner surface 216c and outer surface 216d, LED light source 112 shown in Figure 1 can be thermally coupled on its inner surface 216c.More preferably, LED light source 112 shown in Figure 1 is thermally coupled on the inner surface of base portion 216a of inwall 216.Outer wall 218 has main part 218a and marginal portion 218b, this main part 218a is the shape of reducing gradually from top to bottom, lighting device vertically on this main part 218a fluid to connect ground spaced apart and circumferentially around the outer surface 216d of inwall 216 with inwall 216.More specifically, as seen from Figure 5, the main part 218a of this outer wall 218 circumferentially upper edge part 216b around this inwall 216, footpath upwards shrinks and extends beyond in the vertical the edge part 216b of inwall 216 gradually.Marginal portion 218b is formed on the circumferential edge of main part 218a and extends to form step structure diametrically and vertically.A plurality of fins 220 evenly are connected between the main part 218a of outer wall 218 and inwall 216 to be limited with between any two an air intake passage 222 at a plurality of fins 220 each other at interval.Further, thus these fins 220 from the downstream edge of the main part 218a of this outer wall 218 radially to the outstanding segment distance of central authorities but do not contact in central authorities each other and leave certain space.
To have the lighting device of Fig. 2 and radiator 110 shown in Figure 3 and have Fig. 4 and the lighting device of radiator 210 shown in Figure 5 compares, and can find, the former flow resistance is less and noise is lower.
Fig. 6 shows the perspective view of a kind of embodiment of the back cover of lighting device of the present utility model shown in Figure 1.As shown in Figure 6, this back cover 102 has the head 102a that slightly is square and from the downward outward extending cap portion 102b of this head 102a.Wherein, head 102a and cap portion 102b form container cavity within it jointly, are formed with a plurality of slit 102c on cap portion 102b, and these slits 102c is used as air-out passage when lighting device is worked.
When back cover shown in Figure 6 102 is installed with light source drive 104 shown in Figure 1 and driver heat dissipation element 106, can fill the casting glue that is used for insulation and heat conduction of certain volume in the container cavity of back cover 102, and be embedded at least in part other electronic devices such as the electric capacity except drive circuit board of light source drive 104 in casting glue, again the drive circuit board of driver heat dissipation element 106 contiguous these light source drives 104 is installed on back cover 102, then fan 108 is arranged on driver heat dissipation element 106.Like this, although thereby casting glue, light source drive 104 and driver heat dissipation element 106 have occupied the edge wall that the major part of the wall of back cover 102 do not occupy the lid 102b of this back cover 102 can not interfered with a plurality of slit 102c on cap portion 102b.
In conjunction with Fig. 8, after back cover shown in Figure 6 102 and radiator shown in Figure 1 110 are installed, light source drive 104 and driver heat dissipation element 106 are accommodated in the container cavity of back cover 102, and fan 108 roughly is positioned at the central spatial accommodation of a plurality of fins 120 of radiator.Like this, when lighting device was worked, the heat of LED light source 112 was transmitted on a plurality of fins 120 by inwall 116; Simultaneously, because lighting device inside is high a lot of with respect to the temperature of outside, surrounding air can enter into from the air intake passage 122 that a plurality of fins 120 limit the base portion 116a top of inwall 116 partly to take away the heat on fin 120; Further, fan 108 on the one hand to light source drive 104 heat radiations that are positioned at its top side on the other hand also to the base portion 116a heat radiation of the inwall 116 that is positioned at its bottom side, and the rotation of the fan blade of fan 108 also makes the accelerated disturbance of air and a plurality of slit 102c outflows from being limited by back cover 102 that enter into base portion 116a top.
Fig. 7 shows the perspective view of another kind of embodiment of the back cover of lighting device of the present utility model.As shown in Figure 7, this back cover 202 has the head 202a that slightly is square and from the downward outward extending cap portion 202b of this head 202a.Wherein, head 202a has hollow channel 202c, and this hollow channel 202c is used as air-out passage when lighting device is worked.
When back cover shown in Figure 7 202 is installed with light source drive 104 shown in Figure 1 and driver heat dissipation element 106, the light source driving board of light source drive 104 need to be offered through hole, and light source drive 104, driver heat dissipation element 106 and fan 108 are fixed together and light source drive 104 and driver heat dissipation element 106 are contained in the container cavity of back cover 202.Like this, although the light source driving board of light source drive 104 will be positioned at the air intake passage 122 of radiator 110 of downside and the air-out passage 202c of head 202a that is positioned at the back cover 202 of top side separates, the through hole on light source drive 104 still can keep air intake passage 122 and air-out passage 202c fluid to be communicated with.
After back cover shown in Figure 7 202 and radiator shown in Figure 1 110 were installed, light source drive 104 and driver heat dissipation element 106 were accommodated in the container cavity of back cover 202, and fan 108 roughly is positioned at the central authorities of a plurality of fins 120 of radiator 110.Like this, when lighting device was worked, the heat of LED light source 112 was transmitted on a plurality of fins 120 by inwall 116; Simultaneously, because lighting device inside is high a lot of with respect to the temperature of outside, surrounding air can enter into from the air intake passage 122 that a plurality of fins 120 limit the base portion 116a top of inwall 116 partly to take away the heat on fin 120; Further, fan 108 on the one hand to light source drive 104 heat radiations that are positioned at its top side on the other hand also to the base portion 116a heat radiation of the inwall 116 that is positioned at its bottom side, and the rotation of the fan blade of fan 108 also makes the accelerated disturbance of air that enters into base portion 116a top and the air-out passage 202c outflow that limits from the head 202a by back cover 202.
To have the lighting device of back cover shown in Figure 6 102 and the lighting device of back cover 202 shown in Figure 7 and compare, and can find, the former temperature uniformity is better, and the latter's flow resistance is less.
The inwall that those skilled in the art will appreciate that radiator can be other shapes, for example can be the curved surface that seamlessly transits.
In the above-described embodiments, thereby the central position that will be placed on for the fan to light source drive heat radiation the base portion top of radiator can be used for, radiator is carried out active heat removal, yet, be appreciated that, if do not consider weight and the space of lighting device, can add a dedicated fan except the fan of describing in the above-described embodiments, this dedicated fan is used for this LED light source of active cooling specially again.
Also should be appreciated that, the marginal portion of the outer wall of radiator forms the stepped form factor of lighting device that can make and satisfies better International Electrotechnical Commissio (International Electrotechnical Commission, IEC) standard, thus make lighting device disclosed in the utility model can adapt to various light fixtures.
In addition, those skilled in the art can determine by quantity, spacing, height and the thickness etc. of regulating fin the optimal case of fin.
The utility model can reach following technique effect:
1, the active cooling of the existing fan of technical scheme of lighting of the present utility model has again the passive cooling of radiator, existing LED light source has again the thermal convection current of air between the fin of radiator to the heat conduction of radiator, therefore, hot property is better and thermal resistance is lower, simultaneously, noise level is also acceptable;
2, with passive cooling the comparing of routine, the structure of the disclosed radiator of the utility model is compact, and whole weight can reduce by 50% or more, and simultaneously, cost also is minimized;
3, the disclosed lighting device of the utility model can satisfy the light fixture adaptability of standard to guarantee that it is good of International Electrotechnical Commissio better.
The utility model is limited to the illustrative embodiments that presents never in any form in specification and accompanying drawing.Within all combinations of the embodiment that illustrates and describe (part) are interpreted as clearly and incorporate this specification into and be interpreted as clearly and fall in scope of the present utility model.And in the scope of the present utility model of summarizing as claims, a lot of distortion are possible.In addition, any reference marker in claims should be configured to limit scope of the present utility model.
Claims (10)
1. lighting device, comprising: back cover, radiator and at least one LED light source is characterized in that:
Described radiator comprises:
Inwall, it is dish substantially, has inner surface and outer surface, and described LED light source is thermally coupled on its inner surface;
Outer wall, it has main part, described main part described lighting device vertically on fluid to connect ground spaced apart and circumferentially around the outer surface of described inwall with described inwall;
A plurality of fins, its each interval turn up the soil between the main part that is connected to described outer wall and described inwall to be limited with between any two an air intake passage at described a plurality of fins;
Described back cover is connected on the main part of outer wall of described radiator, is limited with at least one air-out passage on it;
By this, during work, surrounding air flows into via described air intake passage, and the hot-air after heat exchange flows out via described air-out passage.
2. lighting device according to claim 1, is characterized in that, described lighting device vertically on, the main part of described outer wall is the reducing shape towards described back cover.
3. lighting device according to claim 1, is characterized in that, described a plurality of fins end at the downstream edge of the main part of described outer wall substantially.
4. lighting device according to claim 1, is characterized in that, described a plurality of fins are radially outstanding to central authorities from the downstream edge of the main part of described outer wall.
5. lighting device according to claim 1, it is characterized in that, the inner surface of described back cover forms container cavity, described container cavity accommodates light source drive at least so that described air-out passage and described air intake passage are separated, and also offers through hole on described light source drive so that described hot-air flows out via described through hole and described air-out passage successively.
6. lighting device according to claim 1, it is characterized in that, described back cover forms container cavity, and described container cavity accommodates the light source driven unit, described light source driven unit occupies the wall part of described back cover, and described air-out passage is limited on the remainder of wall of described back cover.
7. lighting device according to claim 1, is characterized in that, described air-out passage is near the opening end of described back cover.
8. lighting device according to claim 1, is characterized in that, described inwall, described outer wall and described a plurality of fin are integrated.
9. according to claim 1-8 described lighting devices of any one, is characterized in that, described lighting device also comprises fan, and described fan is arranged between described radiator and described back cover.
10. lighting device according to claim 9, it is characterized in that, the downstream edge of the outer surface of described inwall, the main part of described outer wall and the downstream end of described a plurality of fins are formed with spatial accommodation jointly, and described fan is arranged in described spatial accommodation at least in part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220579409XU CN202972618U (en) | 2012-10-30 | 2012-10-30 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220579409XU CN202972618U (en) | 2012-10-30 | 2012-10-30 | Lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202972618U true CN202972618U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220579409XU Expired - Lifetime CN202972618U (en) | 2012-10-30 | 2012-10-30 | Lighting device |
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| Country | Link |
|---|---|
| CN (1) | CN202972618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116940453A (en) * | 2021-09-09 | 2023-10-24 | 皇家飞利浦有限公司 | Shaving unit and electric shaver comprising same |
-
2012
- 2012-10-30 CN CN201220579409XU patent/CN202972618U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116940453A (en) * | 2021-09-09 | 2023-10-24 | 皇家飞利浦有限公司 | Shaving unit and electric shaver comprising same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |