LED PAR lamp
Technical field
The utility model relates to a kind of lighting, especially a kind ofly take LED as light source, has the PAR lamp of excellent heat dispersion performance.
Background technology
The energy-saving and environmental protection characteristic of light emitting diode (LED), is more and more applied and is approved.In application, progressively to the general illumination field of civilian commercial class, extend from the municipal administration such as road lighting, view brightening illumination, Engineering light on, along with the acceleration lifting of LED performance and the continuous reduction of cost, LED general class illuminating product more fast paces enters ordinary people life.
In the prior art, LED PAR (handkerchief) lamp has direct employing conventional P AR lamp repacking, has the passive heat radiation of direct employing fan, have and directly utilize shell to dispel the heat, etc. multiple technologies embodiment.Take the LED PAR lamp of describing in CN201220319250.8 patent in the patent No., its heat radiation is mainly to carry out passive heat radiation by being fixed on the support at the radiating seat back side, LED light source is produced to heat and by air, distribute fast.Although it is simple in structure that this radiating mode has, the advantages such as good heat dissipation effect, but in routine use, the situation of fan directly determines the service life of PAR lamp, dust, cotton-wool etc. all easily cause the fault of fan, and the fan noise after long-time use also can exert an influence to the use of PAR.
Utility model content
The deficiency existing for above-mentioned prior art, it is a kind of simple in structure that the utility model provides, and has the New LED PAR lamp of excellent heat dispersion performance.
To achieve these goals, technical solution adopted in the utility model is:
LED PAR lamp, include shell, diffusion shell, radiator, LED light source module, the top of LED light source module is provided with diffusion shell, LED light source module is fixed on radiator by bayonet socket or screw, and LED light source module is comprised of LED light source and substrate, and LED light source is welded on substrate, on substrate, be provided with circuit, make whole LED light source connect into integral body, LED light source module is screwed on mounting plane, and substrate back applies one deck Heat Conduction Material; Or adopt welding manner that LED light source module is welded on mounting plane, the mounting plane of radiator is fixed with LED light source module, and the back side is provided with thermal column, and the peripheral anchor ring of radiator protrudes from mounting plane, on anchor ring, be provided with through hole, the top of shell is provided with louvre.
Described thermal column height reduces to periphery gradually from the central authorities of radiator.
The planar cross-sectional thickness that described radiator is installed light source module reduces gradually from central authorities to periphery.
Described thermal column starts to be outwards tapered from bottom.
Described shell is horn-like.
The side that described anchor ring and plane are adjacent is provided with reflective structure.
Substrate adopts aluminium base.
The unsettled enclosure that is fixed on of driving power, radiator is spaced from each other.
Shell adopts plastic material.
On shell, be fixed with lamp holder, adopt screw type or plug-in type.
The beneficial effects of the utility model are:
After radiator planar cross-sectional thickness reduces gradually, contacts with LED thermal source from central authorities to periphery, central thermal capacitance is large, and peripheral thermal capacitance is little, formation temperature is poor, is conducive to form the circulation of air, makes cool exterior air can enter into Inner heat sink, produce heat exchange, improve radiating efficiency.
The design of thermal column and thermal column height and thickness, when reducing heat sink material use, after can also making thermal column ambient air be heated, can form ascending air more fast, realizes heat exchange with extraneous air, improves radiating efficiency.
The through hole of anchor ring and cover top portion through hole have formed cross-ventilated upper lower channel, under similar bell-mouthed shell guiding, carry out heat exchange, thereby improve the convection current of air with outside cold air.
Driving power is arranged on enclosure, is provided with unsettled distance, prevents from being subject on the one hand the impact of radiator temperature, if while meeting accident on the other hand, can effectively completely cut off spark, avoids potential fire hazard.
Accompanying drawing explanation
Fig. 1 is the generalized section of a preferred embodiment of the present utility model;
Fig. 2 is the decomposing schematic representation of a preferred embodiment of the present utility model.
The specific embodiment
As shown in Figure 1 and Figure 2, this preferred embodiment is comprised of critical pieces such as diffusion shell 1, LED light source module 2, radiator 3, driving power 4, shell 5, lamp holders 6 respectively.Wherein, on the mounting plane 31 of radiator 3, be fixed with LED light source module 2.Mounting plane 31 is the smooth plane of surfacing, and LED light source module 2 is comprised of LED light source and substrate, and substrate preferably adopts aluminium base, and LED light source is welded on substrate, on substrate, according to electrical layout, is manufactured with circuit, makes whole LED light source connect into integral body.LED light source module 2 is fixed in the process of mounting plane 31, generally adopts screw to be fixed, and first at substrate back, applies one deck Heat Conduction Material, is fastened on after mounting plane 31, then is fixed with screw; Or adopt welding manner to fix, LED light source module 2 is welded on to mounting plane 31, but material to substrate and mounting plane has comparatively strict requirement.
The top of LED light source module 2, is provided with diffusion shell 1, is arranged on radiator 3, adopts the modes such as bayonet socket, screw to be fixed.Diffusion shell 1 effect is protection LED light source module 2 on the one hand, prevents from being subject to dust, water droplet, foreign matter and enters into lamp interior; Be mainly that LED light source is passed through to the rear uniform of diffusion shell 1 on the other hand, reduce dazzle and pollute.
Radiator 3 is the main thermal component of light fixture, is respectively arranged with mounting plane 31, thermal column 32, anchor ring 33, through hole 34 etc.Wherein, from Fig. 2, we can find out, plane 31 section thicknesses of radiator 3 reduce gradually from central authorities to periphery, that is to say that mounting plane 31 central authorities of radiator 3 are thick, surrounding is thin, correspondingly be LED light source module 2, LED light source is evenly distributed on substrate, has formed substrate center heat large, the heat that outside heat is little distributes, therefore mounting plane 31 central authorities are thick, and the design that surrounding is thin, can transfer heat to thermal column faster.
In the periphery of radiator 3, be provided with anchor ring 33, protrude from mounting plane 31, thereby form the container cavity of a U font, for the parts of LED light source module 2 and diffusion shell 1 are installed.Wherein, the side adjacent with plane 31 at anchor ring 33 is provided with reflective structure, and the emergent light of LED light source is reflected, and reduces light loss, improves light extraction efficiency.
The back side of radiator 3 is provided with thermal column 32, preferably adopts cylindrical shape, to increase area of dissipation.Thermal column 32 starts to be outwards tapered from bottom, adopts lower large little shape, the heat of being convenient to make progress from bottom on the one hand conduction, and the interval, top of the pillar 32 that makes on the other hand to dispel the heat expands, and is conducive to the heat exchange with air.
The height of thermal column 32 reduces to periphery gradually from the central authorities of radiator 3, and because the central temperature of radiator 3 is relatively high, therefore larger for the area of dissipation of thermal column 32, cylinder is higher.And peripheral temperature is lower, minimizing height of column that therefore can be relative.
On anchor ring 33, be provided with through hole 34, the top of shell 5 is provided with louvre 61, with trumpet-shaped shell 5 inside, forms the passage of the upper and lower convection current of air.
Unsettled shell 5 inside that are fixed on of driving power 4, radiator 3 is spaced from each other, to avoid being subject to the impact of radiator 3 high temperature.Shell 5 preferably adopts plastic material to make, and has good insulating properties on the one hand, and driving power 4 is isolated, and on the other hand, has good mechanical strength, can protect internal structure.
On shell 5, be fixed with lamp holder 6, lamp holder 6 sizes meet relevant national standard, preferably adopt screw type as E27 lamp holder, and plug-in type, as GU10, MR16 lamp holder etc., is convenient to user and is changed and use.
Above embodiment is only preferred version of the present utility model, and other any simple or surperficial change is all in protection domain of the present utility model.