Based on the LED pendent lamp of lampshade heat loss through conduction
The present invention relates to a kind of LED pendent lamp based on lampshade heat loss through conduction.
LED lamp is assembled on same pcb board by a lot LED usually, in order to improve brightness and luminous efficiency, adopts the working method of high brightness big current, temperature is caused to raise, if can not the maximum temperature of control LED effectively, will directly have influence on the service life of LED, reduce luminous efficiency.
The mode of heat radiation, usually heat transfer is had, heat radiation and cross-ventilation etc., comparatively speaking, cross-ventilated cost is lower, but air is good heat-barrier material, poor by air radiating effect, for this reason, application number be 201010139375.8 Chinese patent disclose a kind of LED, described LED comprises LED chip, cooling base and lampshade, described lampshade is fixed on described cooling base, described LED chip is in described lampshade, described lampshade is filled with heat-conducting gas, this invention LED heat dispersion significantly promotes, can comparatively good berth at a lower temperature, but this complex structure cost is higher, also be inconvenient to safeguard.
Heat conducting effect is better, and common heat dissipating method increases fin etc., and its Problems existing is that cost is higher, structure is more complicated, and volume is larger.
Also have and fin and fan combination used, be usually used on the light fixture of super high power.
Summary of the invention
The present invention, according to above deficiency, provides a kind of LED pendent lamp based on lampshade heat loss through conduction, mainly the heat of LED is improved radiating effect by the dispel the heat method that combines of lampshade heat loss through conduction, air, thus reduces the temperature of LED, extend the life-span of LED.
Technical scheme of the present invention is:
A kind of LED pendent lamp based on lampshade heat loss through conduction, comprise: the lamp holder fitted together, top cover and columniform lampshade, top cover is provided with electric-controlled plate, some pieces of pcb boards are installed in lampshade, pcb board is provided with multiple LED, the pin of LED is provided with bending segment, also comprise several support rings, pcb board is fixed on the periphery of support ring, under the effect of support ring and lampshade, the elastic force that the bending segment of LED produces makes LED illuminator be close to the inwall of lampshade, and LED illuminator is by lampshade heat loss through conduction, and electric-controlled plate is electrically connected lamp holder and LED respectively.
We know, common direct insertion LED is in welding process, have height, also our invisible injustice may be there is in lampshade, all LED are allowed to be all inconvenient with lampshade close contact, but, if when all there is Elastic Contact in the illuminator of each LED and lampshade inwall, just greatly can reduce both processing requests, the LED of direct erecting and welding is difficult to have elasticity, but after bending process, when bending segment is longer, LED has certain elasticity, control the size of support ring and lampshade well, can ensure that the illuminator of each LED is close to lampshade inwall, the illuminator of LED is by lampshade heat loss through conduction.
Existing light fixture, when the illuminator of LED does not contact with lampshade, the heat of illuminator is by transfer of air to lampshade heat radiation, and obviously, the effect of heat radiation is far short of what is expected.
Electric-controlled plate can select modal current rectifying and wave filtering circuit.LED between some pieces of pcb boards can determine connection in series-parallel according to the voltage of electric-controlled plate.
As preferably, described support ring is provided with two, is arranged on top and the bottom of pcb board respectively.
In order to improve heat-conducting effect, between the end face of described LED illuminator and the inwall of described lampshade, scribble transparent heat-conducting silicone grease.
In order to improve radiating effect, described lampshade is made up of glass.Though glass is not good heat carrier with Metal Phase ratio, compared with air, it is good heat carrier.
Described top cover is provided with fixed leg, and described electric-controlled plate is fixed on this fixed leg.
The end face of the illuminator of described LED is the curved surface matched with the inwall of lampshade.
Described bending segment and pcb board are an angle.
Described angle 5-15 degree.
Design has angle, and the pin of each LED can be made to intersect not short circuit, can improve the packing density of LED.
The present invention has the beneficial effect that structure is simple, cost is low, reduce LED temperature, extend the LED life-span.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the upward view of Fig. 1.
Detailed description of the invention
Now the present invention is further illustrated by reference to the accompanying drawings:
As shown in the figure, a kind of LED pendent lamp based on lampshade heat loss through conduction, comprise: the lamp holder 1 fitted together, top cover 2 and columniform lampshade 4, top cover 2 is provided with electric-controlled plate 3, some pieces of pcb boards 51 are installed in lampshade 4, pcb board 51 is provided with multiple LED52, the pin of LED52 is provided with bending segment 53, also comprise several support rings 6, pcb board 51 is fixed on the periphery of support ring 6, under the effect of support ring 6 and lampshade 4, the elastic force that the bending segment 53 of LED52 produces makes LED52 illuminator be close to the inwall of lampshade 4, LED52 illuminator is by lampshade 4 heat loss through conduction, electric-controlled plate 3 is electrically connected lamp holder 1 and LED52 respectively.
Support ring 6 is provided with two, is arranged on top and the bottom of pcb board 51 respectively, such as, install by riveted joint or screw.
Transparent heat-conducting silicone grease is scribbled between the end face of LED52 illuminator and the inwall of lampshade 4.
Lampshade 4 is made up of glass.
Top cover 2 is provided with fixed leg, and described electric-controlled plate 3 is fixed on this fixed leg.
The end face of the illuminator of LED52 is the curved surface matched with the inwall of lampshade 4.
Bending segment 53 and pcb board 51 are in an angle.
Angle 5-15 degree.