CN103322539A

CN103322539A - LED (light-emitting diode) bulb lamp radiator with small holes formed in radiating body

Info

Publication number: CN103322539A
Application number: CN2013102506278A
Authority: CN
Inventors: 江楠; 江风
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2013-09-25
Anticipated expiration: 2033-06-21
Also published as: CN103322539B

Abstract

The invention provides an LED bulb lamp radiator with small holes formed in a radiating body. The LED bulb lamp radiator with the small holes formed in the radiating body is substantially composed of the radiating body, radiating fins, ring-shaped gaps, the small holes, lampshade mounting grooves and fixing holes; the radiating body is of a hollow cylindrical structure, and the fixing holes of an LED package structure are formed in an enclosed base plate; the radiating fins are of a bent shape with radii gradually reducing from the top of the radiating body to the bottom of the radiating body; the plurality of radiating fins are evenly arranged at intervals in the circumferential direction of the radiating body, a plurality of ring-shaped gaps are formed in every radiating fin in the axial direction of the radiating body, a plurality of small holes are formed in the positions of the radiating body, which correspond to the ring-shaped gaps, along the circumference of the radiating body, the diameter of the small holes is 0.8-1 mm, the lampshade mounting groove is formed in the top of every radiating fin, and every mounting groove is provided with threads. According to the LED bulb lamp radiator with the small holes formed in the radiating body, the small holes are formed in the radiating body, and due to the cross-ventilation among the small holes, the radiating of heat inside the radiating body can be greatly quickened; the ring-shaped gaps extends outwards along the radiating fins to facilitate natural convection heat dissipation.

Description

LED bulb lamp heat radiator body is driven the radiator of aperture

Technical field

The present invention relates to a kind of LED radiator, particularly relate to the radiator that a kind of LED bulb lamp heat radiator body is opened aperture, belong to the LED lighting field.

Background technology

LED as the 4th generation lighting source, have characteristics such as energy-saving and environmental protection, the life-span is long, volume is little, and do not have ultraviolet ray and infrared ray in the LED spectrum, heat is low and do not have stroboscopic, radiationless, and discarded object is recyclable, does not pollute, do not contain characteristics such as mercury element, belong to typical green illumination light source.More and more nervous along with global energy, and to the more and more attention of environmental protection, led light source replacement progressively conventional light source, the trend that becomes light source of new generation is arranged.But cost must enter into consideration and the needs of moulding for the heat dissipation design of LED light fixture, and this has limited heat dissipation design.So cost and heat radiation become the development of restriction LED light fixture always.The LED bulb lamp is a kind of in the LED light fixture, all applies to general lighting usually, and it generally all utilizes the free convection at the radiator position of light fixture to dispel the heat, so the heat radiation quality of radiator has determined the service life of LED bulb lamp.

Summary of the invention

The objective of the invention is to keep the heat in the heat radiator body hollow structure to shed timely, and under the situation that keeps LED bulb lamp radiator integral good heat radiating, save the material of radiator, reduce manufacturing cost as far as possible.

Realization of the present invention is finished by following technological means:

A kind of LED bulb lamp heat radiator body is driven the radiator of aperture: mainly by heat radiator body, and radiating fin, annulus, aperture, lampshade mounting groove and fixing hole constitute; Described heat radiator body is the cylinder-like structure of the hollow of bottom lock, is provided with the fixing hole of LED encapsulating structure at closed bottom; Radiating fin is the bending that radius reduces gradually to the bottom along the heat radiator body top; A plurality of radiating fins evenly at interval arrange circumferentially that along heat radiator body each radiating fin upper edge heat radiator body has axially been offered many annulus, and annulus is for being parallel-laid into circular slit around one week of heat radiator body and with the radiator end face; Annulus is distributed to thin gradient by close from bottom to top, the width of annulus be 0.8 ?1mm, the degree of depth of annulus circumferentially extends to heat radiator body from the radiating fin outer in heat radiator body always; Circumference in the heat radiator body upper edge of annulus correspondence heat radiator body is offered a plurality of apertures, hole diameter be 0.8 ?1mm, offer the lampshade mounting groove on the radiating fin top, mounting groove is provided with screw thread.

Preferably, the spacing between described a plurality of radiating fin is that the heat radiator body girth is divided by the fin number.

Preferably, the diameter on described radiating fin top is 3 times of heat radiator body diameter.

With respect to prior art, the present invention has following advantage:

(1) heat radiator body cavity of the present invention almost becomes enclosure space after light fixture encapsulates, if and the heat in the cavity can not distribute quickly, can influence the heat radiation of the integral body of light fixture so, therefore offer aperture in heat radiator body, because the cross-ventilation between the aperture, this can accelerate shedding of heat in the heat radiator body greatly.

(2) radiating fin is in the heat radiator body outer surface, be by low side to the little crooked laminated structure of lamp tail place's gradual change, offer annulus at fin, simultaneously according to the field synergistic principle, because annulus outwards extends along radiating fin, so more be conducive to Natural Heat Convection.

(3) owing to offering aperture in heat radiator body, so can transmit the heat in the cavity out fast; Simultaneously offer annulus at radiating fin, increased the Natural Heat Convection of fin.Under this comprehensive function aspect two, make the present invention when reaching the same radiating effect with general LED bulb lamp, more save material.

Description of drawings

Fig. 1 is the structural representation that this practical LED bulb lamp heat radiator body is driven the radiator of aperture;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the front view of Fig. 1;

Fig. 4 be Fig. 3 A ?A to cutaway view.

The specific embodiment

The present invention is further illustrated below in conjunction with accompanying drawing, but embodiments of the present invention are not limited thereto.

As figure 1 ?shown in 4, a kind of LED bulb lamp heat radiator body is driven the radiator of aperture, mainly by heat radiator body 1, radiating fin 2, annulus 3, aperture 4, lampshade mounting groove 5 and fixing hole 6 constitute; Heat radiator body 1 is the cylinder-like structure of the hollow of bottom lock, is provided with the fixing hole 6 of LED encapsulating structure at closed bottom, is used for fixing between heat-radiating substrate and the radiator; Radiating fin 2 is for being the bending thin-slab structure that radius reduces gradually to the bottom along heat radiator body 6 tops; A plurality of radiating fins 2 evenly at interval arrange circumferentially that along heat radiator body 1 spacing between a plurality of radiating fins 2 is that the heat radiator body girth is divided by the fin number.Each radiating fin 2 upper edge heat radiator body 1 has axially been offered many annulus 3, and annulus 3 is for being parallel-laid into circular slit around one week of heat radiator body and with the radiator end face; Annulus 3 is distributed to thin gradient by close from bottom to top, the width of annulus 3 be 0.8 ?1mm, the degree of depth of annulus 3 circumferentially extends to heat radiator body from the radiating fin outer in heat radiator body 1 always, blocks radiating fin 2; Annulus 3 is more wide, and the area of dissipation of radiating fin 2 is more big, and annulus 3 is more wide, and annulus 3 hollow air-flows are moving more good.Circumference in the heat radiator body upper edge of annulus 3 correspondences heat radiator body 1 is offered a plurality of apertures 4, for the cross-ventilation in promoting to stitch, also enter aperture for reducing airborne dust simultaneously, aperture 4 is arranged in the annulus 3, the preferred 0.8mm of hole diameter, offer lampshade mounting groove 5 on radiating fin 2 tops, mounting groove 5 is provided with screw thread, lampshade can directly be screwed on the mounting groove, the space in the lampshade that is arranged so that like this links to each other with the external world by the space between the fin, strengthened cross-ventilation, this is conducive to shedding of the interior heat of lampshade.The diameter on radiating fin 2 tops is 3 times of heat radiator body diameter.

Heating during led light source work, heat is transmitted on the heat radiator body 1 by electrically-conductive backing plate, part heat directly passes on the radiating fin 2, another part enters in heat radiator body 1 enclosed cavity, a heat part that enters heat radiator body 1 enclosed cavity is transmitted on the fin 2 again dispels the heat, and some directly dispels the heat by heat radiator body wall 1.Wherein because the aperture that adds on the heat radiator body, accelerated the cross-ventilation in the cavity, having accelerated the air in the annulus again flows, also since on the air-flow direction that flows out in the aperture in the annulus 3 and the fin angle of thermograde direction be zero, collaborative theoretical according to the field, can judge that the radiator that adds annulus and aperture can accelerate the heat radiation of whole radiator.

Radiating fin 2 of the present invention is bending design that radius reduces gradually and is conducive to reduce and has bigger area of dissipation when lamp body takes up room to the bottom along the heat radiator body top.Because the aperture on the heat radiator body is distributed in the radiating fin annulus 3, in the Natural Heat Convection in accelerating the heat radiator body cavity, also help the Natural Heat Convection of accelerating on the radiating fin, according to the collaborative theoretical (Xiong Shaowu in field, the little equality of sieve is mentioned in the collaborative theoretical research progress in field of the augmentation of heat transfer of delivering in petrochemical equipment the 36th the 1st phase of volume):

Wherein Nu-nusselt number is the dimensionless number of an expression heat convection intensity; Re-Reynolds number is expressed as in seam the dimensionless number of stickiness effect and effect of inertia relative size in the air flow process herein; Pr-Prandtl number by the non-hydrochloride number group that the physical properties of fluids parameter is formed, shows the relation of temperature boundary layer and flow boundary layer; -rate of flow of fluid, the flow velocity of air in the expression seam herein;

-the temperature difference represents that herein seam place fin is reaching the temperature difference that exists before the temperature balance; The angle of β-rate of flow of fluid and the temperature difference is expressed as the angle between the thermograde on the flow direction of air in the seam and the fin herein.Because have a thermograde on air-flow direction and the fin in the seam in the present invention, this formula has been explained the Natural Heat Convection effect of annulus 3 reinforcement radiators of the present invention.

Claims

1.LED the bulb lamp heat radiator body is driven the radiator of aperture, it is characterized in that: mainly by heat radiator body, radiating fin, annulus, aperture, lampshade mounting groove and fixing hole constitute; Described heat radiator body is the cylinder-like structure of the hollow of bottom lock, is provided with the fixing hole of LED encapsulating structure at closed bottom; Radiating fin is the bending that radius reduces gradually to the bottom along the heat radiator body top; A plurality of radiating fins evenly at interval arrange circumferentially that along heat radiator body each radiating fin upper edge heat radiator body has axially been offered many annulus, and annulus is for being parallel-laid into circular slit around one week of heat radiator body and with the radiator end face; Annulus is distributed to thin gradient by close from bottom to top, the width of annulus be 0.8 ?1mm, the degree of depth of annulus circumferentially extends to heat radiator body from the radiating fin outer in heat radiator body always; Circumference in the heat radiator body upper edge of annulus correspondence heat radiator body is offered a plurality of apertures, hole diameter be 0.8 ?1mm, offer the lampshade mounting groove on the radiating fin top, mounting groove is provided with screw thread.

2. LED bulb lamp heat radiator body according to claim 1 is driven the radiator of aperture, it is characterized in that: the spacing between described a plurality of radiating fins is that the heat radiator body girth is divided by the fin number.

3. LED bulb lamp heat radiator body according to claim 1 is driven the radiator of aperture, it is characterized in that: the diameter on described radiating fin top is 3 times of heat radiator body diameter.