CN201531809U

CN201531809U - LED underground lamp

Info

Publication number: CN201531809U
Application number: CN2009202435568U
Authority: CN
Inventors: 杨金元
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-07-21
Anticipated expiration: 2019-11-27

Abstract

The utility model discloses an LED underground lamp with a novel structure and excellent radiating property, which is characterized in that a sleeve (11) is additionally arranged in a lamp holder so as to divide the interior of the lamp holder into an inner cavity (1) and an outer cavity (2), through holes (6,8) communicated with the external are respectively formed on the inner cavity (1) and the outer cavity (2), the inner cavity (1) is embedded in the outer cavity (2), and communicated with the outer cavity through the hollow hole formed on the bottom part of the sleeve. By adopting the underground lamp with the structure, natural air flow circuit is formed on the lamp housing to radiate, and the utility model has the advantages of novel and advanced structure, higher reliability, simple structure and low cost.

Description

A kind of LED underground lamp

Technical field

The utility model relates to the light fixture that adopts led light source, particularly a kind of underground lamp of led light source.

Background technology

Be accompanied by the development of semiconductor lighting technology, led light source is being applied to growing field, underground lamp can be directly installed on the ground, because of its special illumination and decoration, beautify effect, and obtained application more and more widely, as will adopt led light source on underground lamp, traditional low-power LED can't satisfy application requirements, so must adopt the solution of single high-power or integrated high-power, but LED power is big more, caloric value is also just big more, and simultaneously, LED has only at a certain temperature could operate as normal, so, present led light source underground lamp is many to add the radiator structure that disposes fan by fin, facilitates the air on the fin to flow by fan, and then realizes heat radiation, adopt the underground lamp of this structure, fan is perishable, complex structure, maintenance difficult.

The utility model content

The purpose of this utility model is to provide a kind of novel structure, the LED underground lamp that heat dispersion is good.

The utility model is realized by the following technical solutions: a kind of LED underground lamp, include led light source, drive circuit, fin and light cover and lamp socket, in lamp socket, have additional sleeve, thereby lamp socket inside is separated to form internal cavity and external cavity, internal cavity and external cavity have through hole with the external world respectively, internal cavity is nested in the external cavity, and the cavity that forms by the cover tube bottom communicates with external cavity.

Further scheme is, the area of section of the through hole in the described external cavity and the external world is greater than the area of section of described internal cavity with the through hole in the external world.

Adopt the underground lamp of this structure, utilize the hot-air light specific gravity to rise, cold air is than the principle of great decline, on lamp housing, formed a kind of flow passage of air, make fin when work mode with natural convection air, the heat that produces is gone out by air transmitted by thermal energy exchange, thereby underground lamp is operated in the normal temperature range always, when the cross section of external cavity and extraneous through hole the time greater than the cross section of described internal cavity and extraneous through hole, more but forced air flows, better effects if.Compared with prior art, not only novel structure advanced person, and reliability is higher, and is simple in structure, with low cost.

Below in conjunction with drawings and Examples the utility model is further set forth.Protection domain of the present utility model includes but are not limited to accompanying drawing and the disclosed content of embodiment.

Description of drawings

Fig. 1 generalized section of the present utility model;

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

Fig. 3 is the removal loam cake of Fig. 2 and the schematic diagram behind the safety glass.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further elaborated.

As Fig. 1, Fig. 2 and shown in Figure 3, this LED lamp source underground lamp includes led light source 3, drive circuit, fin 4 and light cover 9 and lamp socket, in lamp socket, have additional sleeve 11, thereby lamp socket inside is separated to form internal cavity 1 and external cavity 2, internal cavity 1 is equipped with led light source 3 and fin 4, external cavity 2 communicates with the bottom of internal cavity 1, and external cavity 2 adopts outer cover of lamp holder 10 to be isolated from the outside.Be provided with safety glass 5 in led light source 3 upper ends, be used for preventing suffering artificial damage in use, and be provided with loam cake 9 thereon.Internal cavity 1 has venthole 6 to communicate with the external world, and external cavity 2 communicates with the external world by inlet channel 7 and air admission hole 8, and the size in the cross section of air admission hole 8 should be greater than the cross section of venthole 6.

During the work of LED underground lamp, the heat that the led light source 3 in the internal cavity 1 produces is passed to fin 4 by heat, and fin 4 temperature raise, and the internal cavity hot-air rises, and cold air enters from the bottom of internal cavity 1, thereby realizes the convection current of air, finishes heat radiation.When the area of section of air admission hole 8 during greater than the area of section of venthole 6, hot-air acts on the air contact layer between venthole 6 and internal cavity 1 bottom and the external cavity 2 respectively, the sectional area of venthole 6 is different with the sectional area between two cavitys, heated air can only be broken through the less relatively hole of pressure in the cavity of relative closure, promptly breaking through venthole 6 takes heat energy out of cavity and is discharged in the outside air, and can hot-air not taken out of from air admission hole 8, after hot-air is discharged into the external world, internal cavity 1 atmospheric density diminishes, for reaching air pressure balance, air outside then enters into external cavity 2 by air admission hole 8, because external cavity 2 communicates with internal cavity 1, extraneous air can enter into internal cavity 1, thereby the relatively low air of the temperature that enters from the outside has kept the inside and outside air pressure balance, finally form cross-ventilation, realized the conversion of energy, thereby the LED underground lamp in the work is in the normal operating temperature range of setting all the time because of conversion of heat into kinetic energy and potential energy.

Claims

1. LED underground lamp, include led light source (3), drive circuit, fin (4) and light cover (9) and lamp socket, it is characterized in that: have additional sleeve (11) in the lamp socket, thereby lamp socket inside is separated to form internal cavity (1) and external cavity (2), internal cavity (1) has through hole (6,8) with the external world respectively with external cavity (2), internal cavity (1) is nested in the external cavity (2), and the cavity that forms by the cover tube bottom communicates with external cavity (2).

2. LED underground lamp according to claim 1, the area of section that it is characterized in that described external cavity (2) and extraneous through hole (8) is greater than the area of section of described internal cavity (1) with extraneous through hole (6).