CN204901475U

CN204901475U - LED down lamp

Info

Publication number: CN204901475U
Application number: CN201520298215.6U
Authority: CN
Inventors: 陈通朴
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-11
Filing date: 2015-05-11
Publication date: 2015-12-23
Anticipated expiration: 2025-05-11

Abstract

The utility model belongs to the technical field of the photoelectricity of LED illumination, concretely relates to LED down lamp, light source base plate including installation LED light source, the cover is equipped with the shell of tube -shape on the light source base plate, is equipped with radiating fin along vertical direction on the shell, outside extend terminal of radiating fin is equipped with the dustcoat in vertical direction, make the heat dissipation through -hole of intercommunication about forming between the radiating fin. Through realizing directly dispelling the heat of LED light source with the light source base plate with fan -less housing lug connection, improve the radiating efficiency, the heat dissipation through -hole that the dustcoat that is equipped with on the radiating fin end formed, the air come -up of being heated in the heat dissipation through -hole, the outside air constantly gets into from heat dissipation through -hole bottom, carries out convection, forms suction effect, accelerates the convection current of air, further improves LED down lamp's radiating efficiency.

Description

A kind of LED down

Technical field

The utility model relates to a kind of LED down, belongs to the field of photoelectric technology of LED illumination.

Background technology

LED light source is solid luminescent light source, it is electroluminescent light source, the advantages such as it has that luminous efficiency is high, long service life, energy saving, environmental protection, low consumption safety, little, lightweight, the easy light modulation of shockproof waterproof, volume, maintenance are few, become the desirable substitute products of the light sources such as conventional light source incandescent lamp, fluorescent lamp, high/low pressure sodium lamp, gas-discharge lamp, mercury lamp, Halogen lamp LED, become the ideal energy saving environment-friendlylamp lamp of current work, agriculture, business, the indoor and outdoor lighting such as civilian.

For the workplaces such as factory, station, exhibition room, club, Gao Peng place to illumination basic demand be lights crowds, light is radiated at the own color that object will embody object, feels really to people.LED down is a kind of lighting being embedded into light down-ejection type in ceiling, it belongs to directional type lighting, only has its opposite ability light, beam angle belongs to optically focused, light is more concentrated, and comparison of light and shade is strong, more outstanding illuminated object, lumen degree is higher, more sets off out quiet ambiance.But its radiating effect of LED down used at present is not good, and heat can not transmit in time and dispel the heat with the external world, cause that its service life is short, luminous efficiency is low.

For solving the problems of the technologies described above, Chinese patent literature CN202469674 discloses a kind of LED lamp radiator and the LED down with this radiator, described radiator is arranged by some radiating fin joint gaps and encloses around one the hollow columnar structures formed, and described radiating fin is sheet hollow structure; Described LED down comprises flat reflector, is positioned at the LED light source of reflector, LED light source is arranged on metal or ceramic substrate side, flat inwall bottom described metal or ceramic substrate opposite side and flat reflector is smooth fastening, the flat outer wall bottom flat reflector and described radiator smooth fastening.This invention, by radiating fin is designed to hollow structure, improves area of dissipation, and then improves radiating efficiency, and saves the material of whole lamp.

Disclosed in above-mentioned Chinese patent literature, LED down in use, the heat that LED light source gives out is passed to bottom radiator through reflector, be passed to bottom radiator again on the radiating fin of radiator, just carry out heat loss through convection with outside air, it is indirect heat radiation that this radiating mode adopts, if LED light source long-term luminous, unavoidably some heat still rests in glow cup, can not be passed to radiator in time and carry out quick heat radiating; Even if be delivered on the radiating fin of radiator, only dispel the heat by free convection between heat and air, its radiating efficiency is still very low, and therefore the integral heat sink efficiency of LED tubular lamp is low, and service life is short.

Summary of the invention

Therefore, technical problem to be solved in the utility model to be in prior art that LED down is dispelled the heat low defect, thus provides the LED down that a kind of thermal diffusivity is high.

For this reason, the utility model provides a kind of LED down, comprise the light source substrate installing LED light source, described light source substrate is arranged with the shell of tubular, described shell is vertically provided with radiating fin, the outward extending end of described radiating fin is vertically provided with outer cover, makes to form the thermal vias be communicated with up and down between described radiating fin.

Above-mentioned a kind of LED down, is also provided with upper cover on the upside of described shell, described upper cover, surrounds heat radiation cavity between outer casing inner wall and light source substrate.

Above-mentioned a kind of LED down, cover outer wall is provided with radiating fin on described, forms heat dissipation channel between adjacent heat radiation fin.

Above-mentioned a kind of LED down, described upper cover offers cable leadthrough aperture, is provided with LED drive power in described heat radiation cavity; Offer through hole in the middle of described light source substrate, LED light source power line is connected to described LED drive power through described through hole.

Above-mentioned a kind of LED down, is provided with transmissive mirror and/or reflector on the downside of described light source substrate.

Above-mentioned a kind of LED down, described transmissive mirror is fixed on described shell by the transmissive mirror pressing plate be connected with described outer casing screw, and described reflector is threadedly connected on described transmissive mirror pressing plate.

Above-mentioned a kind of LED down, described outer cover vertically extends downward bottom described reflector, outside described outer cover inwall, reflector, transmissive mirror pressing plate, light source substrate and surround cavity between shell, described reflector top is provided with air admission hole, on described transmissive mirror pressing plate, the position of corresponding described air admission hole is provided with air-vent, makes outside air and described cavity connects.

Above-mentioned a kind of LED down, is tightly connected by seam between described upper cover with described shell or is threaded; Adopt seam to be tightly connected between described light source substrate with described shell, be threaded, interference be connected in any one.

Above-mentioned a kind of LED down, described upper cover outer wall is also provided with hook or support.

A kind of LED down that the utility model provides, has the following advantages compared with LED down in prior art:

1. a kind of LED down of providing of the utility model, by shell is directly set on light source substrate, described shell is vertically provided with radiating fin, form the heat dissipation channel of free convection, when LED light source dispels the heat, heat is direct and housing contacts through light source substrate, heat is passed to shell, radiating fin, and then carry out Natural Heat Convection with air, overcome the problem that LED down light source substrate and heat-dissipating casing in prior art are connected the radiating effect difference caused indirectly.This LED down is provided with outer cover at the outward extending end of radiating fin vertically, make between described radiating fin, to form the thermal vias be communicated with up and down, when the heat that LED light source distributes is passed on shell and radiating fin, air in thermal vias and shell, radiating fin carry out heat loss through convection, the air be heated floats, the outside air of thermal vias bottom constantly enters in thermal vias, form swabbing effect, i.e. funnel-shaped radiating mode, accelerate the convection current of air, improve the radiating efficiency of LED down further.

2. a kind of LED down of providing of the utility model, LED down is provided with upper cover on the upside of shell, upper cover, between outer casing inner wall and light source substrate, surround heat radiation cavity, the heat radiation cavity heat that LED light source can be given out, is buffered in heat radiation cavity in time, be passed to again afterwards shell and on radiating fin, realize heat sinking function, when to be convenient to LED light source be high-power, when giving out amount of heat, still high efficiency and heat radiation can be realized.In addition, for improving radiating efficiency further, upper cover outer wall is provided with radiating fin.

3. a kind of LED down of providing of the utility model, on cover and be provided with cable leadthrough aperture, LED driving light source is provided with in the heat radiation cavity of LED lamp, and power supply threading hole is provided with in the middle of light source substrate, power line is connected to described LED drive power through described through hole, on the one hand the heat that distributes of LED driving light source also can through heat radiation cavity be passed to shell and on radiating fin dispel the heat, LED drive power is placed in heat radiation cavity on the other hand, make the overall structure of LED down simple, compact, be convenient to processing and manufacturing.

4. a kind of LED down of providing of the utility model, is also provided with reflector, by the setting of reflector on the downside of light source substrate, strengthen the spotlight effect of LED light source, make LED light source cover on object, by reflector is arranged to different shapes, form difform light source; Upper cover outer wall is provided with hook or support, is convenient to LED down and extraneous mount pad to be fixed.

Accompanying drawing explanation

Fig. 1 is a kind of LED down structural representation that embodiment 1 provides.

Fig. 2 is a kind of LED down shell mechanism top view that embodiment 1 provides.

Fig. 3 is a kind of LED down shell mechanism schematic diagram that embodiment 1 provides.

Fig. 4 is a kind of LED down cover structure top view that embodiment 1 provides.

Fig. 5 is a kind of LED down cover structure schematic diagram that embodiment 1 provides.

Fig. 6 is a kind of LED down reflecting cup structure top view that embodiment 2 provides.

Fig. 7 is a kind of LED down reflecting cup structure schematic diagram that embodiment 2 provides.

Fig. 8 is a kind of LED down structural representation that embodiment 2 provides.

In figure, mark is expressed as: 1-shell, and 2-dispels the heat cavity, 3-radiating fin, 4-light source substrate, 5-upper cover, 6-LED driving power, 7-LED light source, 8-transmissive mirror, 9-transmissive mirror pressing plate, 10-air admission hole, 11-reflector, 12-screw hole, 13-seam, 14-links up with, 15-outer cover, 16-through hole, 17-cable leadthrough aperture.

Detailed description of the invention

Embodiment 1

The present embodiment provides a kind of LED down, as shown in Figure 1, Figure 2 and Figure 3, comprise the light source substrate 4 installing LED light source 7, described light source substrate 4 is arranged with the shell 1 of tubular, described shell 1 is vertically provided with radiating fin 3, the outward extending end of described radiating fin 3 is vertically provided with outer cover 15, makes to form the thermal vias be communicated with up and down between described radiating fin 3.

Adopt the LED down of said structure, on the one hand, by described light source substrate 4 is connected directly between on heat-dissipating casing 1, the heat that LED light source 7 distributes directly is passed on shell 1 and radiating fin 3 through light source substrate 4, with cross-ventilation, realize the direct heat radiation of LED light source 7, thus improve the radiating efficiency of LED down; On the other hand, outer cover 15 is provided with vertically at the outward extending end of described radiating fin 3, make to form the thermal vias be communicated with up and down between described radiating fin 3, when the heat that LED light source 7 distributes is passed on shell 1 and radiating fin 3, air in thermal vias and shell 1, radiating fin 3 carry out heat loss through convection, the air be heated floats, the outside air of described thermal vias bottom constantly enters in thermal vias, form swabbing effect, i.e. funnel-shaped radiating mode, accelerate cross-ventilation, improve the radiating efficiency of LED down further.

Further, upper cover 5 is also provided with on the upside of described shell 1, described upper cover 5, between shell 1 inwall and light source substrate 4, surround the cavity 2 that dispels the heat, the heat that LED light source 7 can give out by heat radiation cavity 2 is buffered in heat radiation cavity 2 in time, its heat is passed to described shell 1 and radiating fin 3 by the cavity 2 that dispels the heat afterwards, realizes heat sinking function; By described heat radiation cavity 2 as heat transition chamber, prevent when LED light source 7 is for time high-power, the heat given out can not be passed to the external world in time and carry out cross-ventilation heat radiation, affects the service life of LED light source.

Further, the outer wall of described upper cover 5 is also provided with radiating fin, LED down is not only dispelled the heat by described shell 1, radiating fin 3 and thermal vias, the radiating fin that can also be provided with by described upper cover 5 and upper cover 5 outer wall is dispelled the heat, and more preferably improves the integral heat sink effect of LED down.

Described upper cover 5 offers cable leadthrough aperture 17, in cable leadthrough aperture 17, is provided with cable entry, in described heat radiation cavity 2, be provided with LED drive power 6; Offer through hole 16 in the middle of described light source substrate 4, the power line of LED light source 7 is connected in described LED drive power 6 through described through hole 16, and is drawn by cable entry.LED drive power 6 is arranged in heat radiation cavity 2 and the overall structure of LED down can be made simply compact, in addition, arranges cable entry and this LED down can be made to use under explosion-proof occasion.

Have multiple for the mode that is connected and fixed between described upper cover 5 and described shell 1, in the present embodiment, excellent employing seam 13 is selected to be tightly connected, make the sealing in heat radiation cavity 2 good, guarantee built-in LED driving light source 6 not by the impact of external environment, such as steam, can also use thread connecting mode certainly, as long as other connected modes be fixedly connected with described shell 1 by described upper cover 5.Between described light source substrate 4 and described shell 1, connected mode also has multiple, in the present embodiment, preferably adopts interference to connect, except this connected mode, other connected modes seam can also be adopted to be tightly connected, being threaded etc., do not do concrete restriction, determine according to actual service condition.If all adopt seam to be sealedly connected and fixed between described upper cover 5 and described shell 1, between described light source substrate 4 and described shell 1, LED down can be made into explosion-proof type LED down.

Preferably, transmissive mirror 8 and reflector 11 is also provided with on the downside of described light source substrate 4, described transmissive mirror 8 is fixedly connected on described shell 1, specifically, described transmissive mirror 8 is fixed on described shell 1 by the transmissive mirror pressing plate 9 be threaded with described shell 1, and described reflector 11 is threadedly connected on described transmissive mirror pressing plate 9.Described transmissive mirror 8 can be difformity, is convenient to the light that LED light source 7 sends and forms difform light source through described transmissive mirror 8, such as, adopt semicircle ball-type transmissive mirror; Described reflector 11, mainly the light that LED light source 7 sends is carried out optically focused, improve the light extraction efficiency of LED down, strengthen the intensity throwing into irradiated object glazing, the shape of described reflector 11 also can be multiple, such as horn, concrete shape designs according to actual use procedure or adjusts.Certainly, in actual use, will can only be provided with described transmissive mirror 8 in LED down, also only can be provided with described reflector 11, form the LED down of different structure, meet the demand of different client.

The shape that the outward extending end of described radiating fin 3 surrounds vertically has various ways, preferably adopt cylindrical in the present embodiment, namely as shown in Figure 5, the shape of described outer cover 15 corresponds to cylindrical, can also be other shapes of regular polygon etc. certainly.Mode is connected and fixed between described outer cover 15 and the outward extending end of described radiating fin 3, as shown in Figures 2 and 3, preferred employing screw is connected and fixed, as shown in Figure 4, inside outer cover 15 upper and lower end parts, be provided with screw hole 12, on described radiating fin 3, corresponding described screw hole 12 place offers screw hole.

Embodiment 2

The present embodiment provides a kind of LED down, difference from Example 1 is: as shown in Figure 8, described outer cover 15 vertically extends downward bottom described reflector 11, outside described outer cover 15 inwall, reflector 11, transmissive mirror pressing plate 9, light source substrate 4 and surround cavity between shell 1, as shown in Figure 6 and Figure 7, described reflector 11 top is provided with air admission hole 10, and on described transmissive mirror pressing plate 9, the position of corresponding described air admission hole 10 is provided with air-vent, makes outside air and described cavity connects.The air admission hole 10 of outside air on described reflector 11, the air-vent on transmissive mirror pressing plate 9 enter in described cavity, and the thermal vias that empty chamber air is formed through fin 3 and outer cover 15 realizes heat loss through convection.

Described upper cover 5 outer wall is provided with hook 14 or the support of various ways, is convenient to LED down to be fixed with extraneous mount pad be connected; Connected mode between described outer cover 15 and described reflector 11, preferred employing seam is tightly connected, certainly other be fixedly connected with mode, described outer cover 15 and reflector 11 contact position can also be made to leave gap, allow outside air enter described cavity through this gap, realize funnel-shaped heat radiation.

Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.

Claims

1. a LED down, it is characterized in that: comprise the light source substrate (4) installing LED light source (7), described light source substrate (4) is arranged with the shell (1) of tubular, described shell (1) is vertically provided with radiating fin (3), described radiating fin (3) outward extending end is vertically provided with outer cover (15), makes to form the thermal vias be communicated with up and down between described radiating fin (3).

2. a kind of LED down according to claim 1, it is characterized in that: described shell (1) upside is also provided with upper cover (5), described upper cover (5), surrounds the cavity (2) that dispels the heat between shell (1) inwall and light source substrate (4).

3. a kind of LED down according to claim 2, is characterized in that: on described upper cover (5) outer wall, be provided with radiating fin, form heat dissipation channel between adjacent heat radiation fin.

4. a kind of LED down according to Claims 2 or 3, is characterized in that: described upper cover (5) offers cable leadthrough aperture (17), is provided with LED drive power (6) in described heat radiation cavity (2); Offer through hole (16) in the middle of described light source substrate (4), LED light source power line is connected to described LED drive power (6) through described through hole (16).

5. a kind of LED down according to claim 1, is characterized in that: described light source substrate (4) downside is provided with transmissive mirror (8) and/or reflector (11).

6. a kind of LED down according to claim 5, it is characterized in that: described transmissive mirror (8) is fixed on described shell (1) by the transmissive mirror pressing plate (9) be threaded with described shell (1), described reflector (11) is threadedly connected on described transmissive mirror pressing plate (9).

7. a kind of LED down according to claim 6, it is characterized in that: described outer cover (15) vertically extends downward described reflector (11) bottom, cavity is surrounded between described outer cover (15) inwall, reflector (11), transmissive mirror pressing plate (9), light source substrate (4) outside and shell (1), described reflector (11) top is provided with air admission hole (10), the position of the upper corresponding described air admission hole (10) of described transmissive mirror pressing plate (9) is provided with air-vent, makes outside air and described cavity connects.

8. a kind of LED down according to Claims 2 or 3, is characterized in that: be tightly connected by seam (13) or be threaded between described upper cover (5) with described shell (1); Adopt seam (13) to be tightly connected between described light source substrate (4) with described shell (1), be threaded, interference be connected in any one.

9. a kind of LED down according to claim 8, is characterized in that: described upper cover (5) outer wall is also provided with hook (14) or support.