Led lamp with radiator structure
The present invention relates to a kind of led lamp, particularly a kind of led lamp with radiator structure.
Light emitting diode is as a kind of light emitting source efficiently, has many characteristics such as environmental protection, brightness height, power saving, life-span be long and applied to various fields widely, as as lighting apparatus such as street lamps.But, can produce great amount of heat during light emitting diode work, if these heats can not get distributing timely, make light emitting diode produce superheating phenomenon easily, and then cause its luminous efficiency to descend.
To the traditional solution of electronic element radiating problem one radiator is installed on heat-generating electronic elements normally, this radiator comprises the base plate that closely contacts with electronic component, is located at the some radiating fins on the base plate.This radiator generally only depends on radiation mode outwards to dispel the heat, and efficient is lower, is prone to cause gathering of heat, influences the luminous efficiency of led lamp.For strengthening flowing of radiator surrounding air, strengthen its radiating effect, can on radiator, increase by a fan, but fan self is easy to generate heat, produces noise, and increased the power consumption of led lamp, cost is increased.
Summary of the invention
In view of this, be necessary to provide a kind of led lamp with radiator structure, its radiator structure can carry out good heat radiation to light emitting diode module by steering current.
A kind of led lamp with radiator structure; Comprise that a light emitting diode module, is in order to be sticked and to cool off the radiator of said light emitting diode module; Said radiator comprises the main body of the column that contacts with light emitting diode module; The outer surface of said main body has some fin, and the lateral border of fin interconnects, thereby between the fin of main body periphery, forms some gas channels that extend along the body axis direction; Said radiator is hemispherical; Its external diameter prolongs axis direction and diminishes gradually to the other end from an end, and a housing connects the lateral border of fin and surrounds the bigger end of radiator, and housing only surrounds the bigger the latter half of heat sink sizes.
Compared with prior art; Form some gas channels on the radiator of led lamp of the present invention; Strengthen air in radiating part convection current up and down; It can realize the led lamp better heat radiating effect through the design on the heat spreader structures, has guaranteed that light emitting diode module efficiently, stably work.
With reference to the accompanying drawings, in conjunction with specific embodiment the present invention is done further description.
Description of drawings
Fig. 1 is the stereogram that the present invention has led lamp one preferred embodiment of radiator structure.
Fig. 2 has the cutaway view of the led lamp of radiator structure along axis II-II among Fig. 1.
Fig. 3 is the inversion figure that has the led lamp of radiator structure among Fig. 1.
Fig. 4 has the cutaway view of the led lamp of radiator structure along axis IV-IV among Fig. 3.
Fig. 5 is the upward view that has the led lamp of radiator structure among Fig. 1.
Fig. 6 is the vertical view that has the led lamp of radiator structure among Fig. 1.
The specific embodiment
Shown in Fig. 1-2, led lamp of the present invention is made up of a light emitting diode module 200 and be used to the to be sticked radiator 100 of this light emitting diode module 200.This radiator 100 roughly is hemispherical, and its external diameter diminishes to the upper end from the bottom along axis direction gradually.This radiator 100 comprises a main body 10, the outward extending fin 20 of some autonomous agents 10 outer surfaces and surrounds half bigger part of fin 20 external diameters is the housing 30 of the latter half.
Please in the lump with reference to figure 3 to Fig. 6, main body 10 has an endothermic section 12, one 12 1 ends extend from the endothermic section heat transfer part 15 and a junction 18.This connecting portion 18 extends from the other end of heat transfer part 15 relative endothermic sections 12, and exceeds fin 20 tops.Endothermic section 12, heat transfer part 15 and connecting portion 18 are coaxial cylinder.Wherein the radius of the radius ratio endothermic section 12 of heat transfer part 15 is little, and the radius of the radius ratio heat transfer part 15 of connecting portion 18 is little, so entire body 10 is from stepped.
Be provided with an open cavity in the endothermic section 12, this cavity and heat transfer part 15 place opposite both sides, endothermic section 12 respectively.This cavity inner bottom surface evenly is provided with four screws 120, to combine on screw (figure does not show) is fixed on light emitting diode module 200 in the endothermic section 12.Establish an open cylindrical cavity in the connecting portion 18, this cavity partly is absorbed in heat transfer part 15.Said cavity inner wall evenly forms three connection ribs 181 that extend along body axis inwardly; Each connection rib 181 top is equipped with an installing hole 180 to connect a lamp holder (figure does not show) through some connectors (figure does not show); This lamp holder is a standard component, can buy from market.Be provided with some perforation 40 in the said heat transfer part 15, to be communicated with the cavity of endothermic section 12 and connecting portion 18.
Fin 20 from the endothermic section 12 and the outer surface of heat transfer part 15 outwards be radial extension along the axis direction of main body 10.End face near heat transfer part 15 of these fin 20 is concordant with the end face of heat transfer part 15, and its end face near endothermic section 12 is concordant with the end face of endothermic section 12.The outward flange of these fin 20 along the body axis direction from the endothermic section to heat transfer part gradually near axis, thereby make entire radiator have the outer surface of an evagination such as hemisphere shape, wherein fin 20 evenly forms the slits that extend along the body axis direction at interval.
Housing 30 is an annular slice, and it vertically connects the part of fin 20 external end edges near endothermic section 12, and entire radiator 100 half parts are fenced up.Wherein this housing 30 is concordant with fin 20 1 ora terminalis near the ora terminalis of endothermic section 12, the middle part that another ora terminalis of housing 30 prolongs axis direction near fin 20 external end edges.Therefore, the outer surface of housing 30, fin 20 and endothermic section 12 surrounds some gas channels jointly, and these gas channels extend along the body axis direction.Each gas channel has to be established and the air intake vent 80 of radiator 100 near an end of endothermic section 12, and is in the air outlet 50 of radiator 100 along main part 10 axis middle part by what the outer surface of housing 30, fin 20 and endothermic section 12 surrounded.
Light emitting diode module 200 is contained in the cavity of endothermic section 12 of radiator 100, comprises the circuit board 220 of being located at cavity floor in one and is fixed on the some light emitting diodes 210 on this circuit board 220.This circuit board 220 is provided with circuit (figure does not show), to electrically connect with corresponding light emitting diode 210.The electric wire of the perforation 40 of the circuit on the said circuit board 220 through placing heat transfer part 15 (figure does not show) electrically connects with a power supply.
During work, the endothermic section 12 of led lamp down, connecting portion 18 is up, and is as shown in Figure 1.The heat that light emitting diode 210 produces spreads all over entire radiator 100 rapidly, equably.Specifically, the heat that light emitting diode 210 produces is passed to heat transfer part 15 through endothermic section 12, simultaneously heat is passed in the peripheral fin 20 by endothermic section 12 and heat transfer part 15 again, is distributed in the ambient air at last.The fin 20 ambient airs especially air in the gas channel that the outer surface of housing 30, fin 20 and endothermic section 12 surrounds jointly are heated; Its density diminishes, and is risen by buoyancy, and the air intake vent 80 of cold air below gas channel mends gas channel; Form stack effect; Be the flowing naturally from bottom to top of air, strengthened distributing of radiator 100 heats, improved radiating efficiency.Wherein because housing 30 has only surrounded fin 20 larger-size the latter halfs; Make the air outlet 50 above the gas channel keep bigger size; The air that is unlikely to hinder in the gas channel owing to air outlet is too little circulates rapidly; Reduce heat gathering around radiator 10, realized the good heat radiating of light fixture, and then solved the heat dissipation problem of High Power LED light fixture.