CN202938275U - LED (Light Emitting Diode) lamp and heat dissipating device thereof - Google Patents

Abstract

The utility model relates to an LED (Light Emitting Diode) lamp and a heat dissipating device thereof. The LED lamp comprises a fan and also an annular housing and a bottom plate arranged on the lower end face of the annular housing, wherein the fan is arranged inside the annular housing, comprises a rotating shaft, a frame and blades, and is connected with the annular housing through the frame; the fan is obliquely arranged relative to the bottom plate, and an included angle of 3-30 degrees is formed between the rotating shaft of the fan and the normal direction of the bottom plate; the area of the bottom plate is smaller than the area of the internal periphery of the annular housing; and an air flow channel is formed between the annular housing and the bottom plate. By adopting the scheme provided by the utility model, air back flow can be avoided, the eddy noise is reduced, the air flow heat exchange is improved, and a heat dissipating effect is good.

Description

The heat abstractor of LED light fixture and LED light fixture

Technical field

The utility model relates to heat dissipation technology, relates in particular to the heat abstractor of LED light fixture and LED light fixture.

Background technology

Existing integral LED bulb design is all that electronic driver and the metal circuit board that LED is housed are assemblied in the housing of a sealing jointly.Housing is by lamp holder, and the insulation casing of electric ballast is installed, and heat abstractor and luminous end face case form.Ring-shaped shell is the metalwork of a heat conduction normally, and it has good direct heat conduction to contact with the metal circuit board that the LED element is installed.The heat that LED produces, the larger air contact-making surface by ring-shaped shell itself, externally distribute heat, carry out cooling.LED is electrically connected to by wire and electronic driver.Due to bulb area and weight limits the area of ring-shaped shell, heat exchange is inadequate, therefore fan or other air driven device are installed in a lot of LED design meetings additional in lamp housing inside, by increasing Air Flow, improve the cooling effect.As Chinese patent Granted publication 201232989Y, disclosed a kind of LED bulb.This technology comprises lamp holder and lamp housing, is provided with power circuit and LED lamp plate in shell, also is provided with at least one fan in shell as unique radiator structure.The shortcoming of this technology is, air is all the time in the enclosure interior circulation, and air can not be directly delivered to heat beyond housing.Therefore only played in lamp housing, the whole effect uniformly of temperature, can't reach basic cooling purpose.

For the heat by housing is sent the lamp housing outside, further technology is, on the sealing lamp housing, ventilating opening is set, improve cooling effect by the air external circulation in the fans drive lamp housing, as TaiWan, China, license is announced No. M346745, the TaiWan, China license is announced No. M330426, and Chinese granted patent is announced No. 201739819U etc.All these technology are all to be provided with air inlet or air outlet at bulb periphery diverse location.In order to prevent heated air and the mixing of the gas of coming in enclosure interior, the air-flow spacer assembly of more complicated is arranged in lamp housing inside.But this device can form very large gas-flow resistance, reduce the operating efficiency of fan or produce eddy current crack.And, in order to reduce air resistance, the volume of bulb will be done very greatly, but this has been subject to again the restriction of bulb standard and cost.Another significant drawbacks of these lamp technology is exactly its air inlet or air outlet, wherein at least one all is arranged on the latter half of of bulb, in the time of in this light source installs to a light fixture or lampshade, the air through heating that bulb is discharged previously can be forced to reflux and again flow into air inlet from the surrounding of lampshade, thereby has greatly weakened the heat exchanger effectiveness of air.Even if the technology of improved, as No. 201706458Uth, Chinese patent Granted publication, disclosed and a kind of inlet and outlet all designed forwardly, but, because inlet and outlet is adjacent excessively near, can not avoid well the backflow of hot-air.The design of upgrading is on above-mentioned patent 201706458U technical foundation, the gas outlet at edge is changed to the center of heat dissipation plate, increases the distance between importing and exporting, and reduces and imports and exports the possibility that gas mixes, as shown in Figure 1.This technology is the second gas channel 25 to be arranged to the central authorities of pedestal 22, like this, air-flow is discharged from the second gas channel 25 from the first gas channel 24 enters, have like this two shortcomings: 1, the gas outlet of the second gas channel 25 is surrounded by the air inlet of circle first inlet channel 24, although certain distance is arranged, the hot gas blown out is surrounded by columnar charge air flow wall, and hot-air is to external diffusion the time, still, within can being inhaled into bulb greatly, refluxed; 2, fin separates with the shell of parcel fin, between there is thermal resistance, and the inwall of smooth case ring-shaped shell can not produce sufficient heat exchange, do not have effective cooling effect.

The utility model content

The problem that the utility model solves is that existing LED light fixture easily causes backflow and the not good problem of radiating effect.

For addressing the above problem, the utility model provides a kind of heat abstractor of LED light fixture, comprise ring-shaped shell and be arranged on the base plate of ring-shaped shell lower surface, described fan is arranged on ring-shaped shell inside, it comprises rotating shaft, framework and blade, it is obliquely installed with respect to base plate, and the normal direction of its rotating shaft and base plate forms the angle that 3 degree-30 are spent;

The area of described base plate be less than described ring-shaped shell in enclose area, and form gas channel between ring-shaped shell and base plate.

Further, described ring-shaped shell and base plate are made by Heat Conduction Material.

Further, described fan is obliquely installed with respect to base plate, and fan frame upwarps an end and contacts and seal with ring-shaped shell, forms air intake space; The fan frame end that sinks contacts and seals with base plate, forms the air-out space.

A kind of LED light fixture, comprise the heat abstractor of above-mentioned LED light fixture.

Further, described light fixture comprises the operplate printing circuit board, is provided with some LED luminescence chips on it, and described operplate printing circuit board is fitted in the lower surface of described base plate;

Described light fixture also comprises electronic drive circuit, and it is arranged on the top of described fan.

Compared with prior art, the utlity model has following advantage:

1, because the utility model fan tilts to install, air inlet and the air outlet also relative both sides in base plate, like this, air inlet and air outlet keep maximum distance and different directions, so, avoided to greatest extent backflow phenomenon, and reduced eddy current crack; In addition, under the fan effect, air-flow has sufficient the contact and heat exchange, good heat dissipation effect with ring-shaped shell and base plate.

2, become the part of the shell of the utility model LED light fixture due to ring-shaped shell of the present utility model, and this ring-shaped shell is that Heat Conduction Material is made, do not have extra thermal contact resistance between ring-shaped shell, base plate, be conducive to the external heat exchange.

3, due to base plate of the present utility model and the laminating of operplate printing circuit board, it can be conducted by heat the heat produced on the operplate printing circuit board to base plate and ring-shaped shell, and, by the rotation of fan, accelerate convection current.

The accompanying drawing explanation

Fig. 1 is the structural representation of existing LED light fixture;

Fig. 2 is the three-dimensional exploded view of the utility model LED light fixture;

Fig. 3 is the cutaway view of the utility model LED light fixture.

The specific embodiment

By describing technology contents of the present utility model, structural feature in detail, being reached purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be described in detail.

Refer to Fig. 2 and Fig. 3, LED light fixture of the present utility model comprises lamp shell 1, drives electronic circuit 2, heat abstractor 3, operplate printing circuit board 4 and lampshade 5.

Please continue to consult Fig. 2 and Fig. 3, described lamp shell 1 has spatial accommodation 11, and described driving electronic circuit 2 is positioned at described spatial accommodation 11, changes the voltage voltage required into the LED lamp of civil power.

Please continue to consult Fig. 2 and Fig. 3, described heat abstractor 3 comprises base plate 31, ring-shaped shell 32, fan 33.Base plate 31 also has normal 3111.Operplate printing circuit board 4 is electrically connected with driving electronic circuit 2, in order to the driving LED luminescence chip, this operplate printing circuit board 4 is fixed in the lower surface of base plate 31, adopt such setting, the heat that operplate printing circuit board 4 produces can be passed to base plate 31 and brushed by fan 33 and dispel the heat, and has reached the most effective radiating effect.

Please continue to consult Fig. 2 and Fig. 3, fan 33 comprises rotating shaft, framework and blade.The rotating shaft of fan 33 is tilted with respect to base plate 31, and concrete relative normal 3111 tilts, and more particularly the rotating shaft of normal 3111 and fan 33 forms the angle of cut of scope between 3 degree-30 degree, and like this, fan 33 can be so that air-flow and base plate 31 carry out heat exchange.

Please continue to consult Fig. 2 and Fig. 3, fan 33 comprises rotating shaft, framework and blade, it is surrounded by ring-shaped shell 32, fan 33 is obliquely installed with respect to base plate 31, fan 33 frameworks upwarp an end and are connected and seal with ring-shaped shell 32, the fan 33 frameworks end that sinks is connected and seals with base plate 31, forms air intake space 35 and air-out space 36, guarantees different directions and the ultimate range of air intake and air-out; The area of base plate 31 be less than ring-shaped shell 32 in enclose area, and form gas channel between ring-shaped shell 32 and base plate 31; .

This air-out space 36 and air intake space 35 are communicated with by the interlobate space of fan 33, and the air-flow of air-out space 36 and air intake space 35 circulations can only be communicated with by the interlobate space of fan 33, have avoided leaking out.Please continue to consult Fig. 2 and Fig. 3, preferred, ring-shaped shell 32, base plate 31 are connected as a single entity, and the integrative-structure all formed by the Heat Conduction Material casting, owing to adopting integrative-structure, make above-mentioned parts not have thermal resistance, are convenient to heat exchange.

Please continue to consult Fig. 2 and Fig. 3, operation principle of the present utility model is as follows:

When fan 33 rotates, suck extraneous air-flow, enter air intake space 35 along forming air intake passage 321 between ring-shaped shell 32 and base plate 31, in air intake space 35, extraneous air-flow absorbs the heat to base plate 31 and driving electronic circuit 2 from 4 conduction of operplate printing circuit board, heated air-flow enters described air-out space 36 from the interlobate space of fan 33, as shown by the arrows in Figure 3, from air-out passage 322, discharges; Because the utility model fan 33 is divided into two the inner space of ring-shaped shell 32, be respectively air-out space 36 and air intake space 35, and fan 33 tilts to install, air inlet and the air outlet also relative both sides in base plate 31, like this, air inlet and air outlet keep maximum distance and different directions, so, avoid to greatest extent backflow phenomenon, and reduced eddy current crack.

Simultaneously, ring-shaped shell 32, base plate 31 adopt integrative-structure, make above-mentioned parts not have thermal resistance, heat from operplate printing circuit board 4 and 2 generations of driving electronic circuit, direct heat is conducted to base plate 31 and ring-shaped shell 32, because ring-shaped shell 32 is also the lampshade of the utility model LED light fixture simultaneously, can make like this heat directly fall to extraneous radiation, be convenient to heat exchange.

Above disclosed be only several specific embodiment of the present utility model, but the utility model is not limited thereto, the changes that any person skilled in the art can think of, all should drop in protection domain of the present utility model.

Claims (5)

1.LED the heat abstractor of light fixture, comprise fan, it is characterized in that: also comprise ring-shaped shell and be arranged on the base plate of ring-shaped shell lower surface, described fan is arranged on ring-shaped shell inside, it comprises rotating shaft, framework and blade, it is obliquely installed with respect to base plate, and the normal direction of its rotating shaft and base plate forms the angle that 3 degree-30 are spent;

The area of described base plate be less than described ring-shaped shell in enclose area, and form gas channel between ring-shaped shell and base plate.

2. the heat abstractor of LED light fixture according to claim 1, it is characterized in that: described ring-shaped shell and base plate are made by Heat Conduction Material.

3. the heat abstractor of LED light fixture according to claim 1, it is characterized in that: described fan is obliquely installed with respect to base plate, and fan frame upwarps an end and contacts and seal with ring-shaped shell, forms air intake space; The fan frame end that sinks contacts and seals with base plate, forms the air-out space.

4.LED light fixture is characterized in that: the heat abstractor that comprises any one described LED light fixture in claims 1 to 3.

5. LED light fixture according to claim 4, it is characterized in that: described light fixture comprises the operplate printing circuit board, is provided with some LED luminescence chips on it, described operplate printing circuit board is fitted in the lower surface of described base plate;

Described light fixture also comprises electronic drive circuit, and it is arranged on the top of described fan.

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