CN206310277U - LED illumination lamp - Google Patents

Abstract

The utility model provides an LED lighting fixture, which comprises a lampshade, a heat dissipation shell, an LED base plate fixed on the heat dissipation shell, and a base for accommodating a driving circuit board. The LED base plate is provided with a plurality of light emitting diodes. The heat dissipation shell is a hollow shell, the seat body is fixed in the heat dissipation shell and forms a gap with the inner wall of the heat dissipation shell, and the side wall of the heat dissipation shell is provided with a The gaps are connected with air guide holes, and a heat dissipation fan is also arranged in the heat dissipation housing. In the LED lighting fixture provided by the utility model, the heat generated by the LED substrate is exchanged with the air through the heat dissipation shell, so as to achieve the purpose of heat dissipation. The air guide hole enters the gap between the inner wall of the heat dissipation housing and the base body, so that heat exchange can be performed on the inner wall of the heat dissipation housing, and the cooling fan can accelerate the flow of air, enhance the heat dissipation effect, and effectively improve the heat dissipation efficiency.

Description

LED lighting

technical field

The utility model relates to an LED lighting fixture, in particular to an LED lighting fixture with a heat dissipation structure.

Background technique

Compared with traditional light sources, light-emitting diodes (LEDs) have higher luminous efficiency (the temperature of the light source is lower than that of ordinary bulbs), low radiation, low power consumption, long life, low voltage, fast startup, environmental protection, shock resistance and pressure resistance, lamps can be Due to the advantages of miniaturization, lighting devices using LEDs as light sources are currently widely used in various lighting applications, such as indoor lighting, outdoor lighting, portable lighting (such as flashlights), and situational lighting. LEDs will generate heat when they work, and the circulation between the air with this heat and the air in the surrounding environment will dissipate heat, but the effect of this cooling method is limited, especially after the LED has been working for a long time, this cooling method alone cannot be used. The generated heat is evacuated in time, which increases the temperature of the LED and seriously affects the luminous efficiency of the LED and the service life of the LED lamp.

In order to solve the heat dissipation problem of LED lamps, heat dissipation fins are often added to the lamp housing in the prior art. Although this method effectively increases the heat dissipation area, it will increase the volume and weight of LED lamps. In addition, too small fins Fin spacing will cause dust and impurities to deposit in the fin gap, resulting in reduced heat dissipation.

Utility model content

The purpose of the utility model is to provide an LED lighting fixture, aiming at solving the problems of the existing LED lighting fixtures such as large volume and weight, and low heat dissipation capacity.

The utility model is achieved in that:

The utility model provides an LED lighting fixture, which comprises a lampshade, a heat dissipation shell, an LED base plate fixed on the heat dissipation shell, and a base for accommodating a driving circuit board. The LED base plate is provided with a plurality of light-emitting diodes. The heat dissipation shell is a hollow shell, the seat body is fixed in the heat dissipation shell and forms a gap with the inner wall of the heat dissipation shell, and the side wall of the heat dissipation shell is provided with a The gaps are connected with air guide holes, and a heat dissipation fan is also arranged in the heat dissipation housing.

Further, the air guide hole includes a first air guide hole and a second air guide hole, and the second air guide hole is farther away from the LED substrate than the first air guide hole.

Further, the heat dissipation housing has a top wall, there is a gap between the top surface of the base and the top wall of the heat dissipation housing, and the heat dissipation fan is located in the gap.

Further, a heat dissipation chassis is provided between the LED substrate and the heat dissipation housing, and the LED substrate is fixed on the heat dissipation chassis. The heat generated by the LED substrate is conducted to the heat dissipation chassis, and then to the heat dissipation housing through the heat dissipation chassis.

Further, the heat dissipation chassis is made of metal material or ceramic material.

Further, a heat conduction medium is also arranged between the LED substrate and the heat dissipation chassis.

Further, the heat conduction medium is one of graphite heat conduction sheet, heat conduction tape or ceramic heat conduction plate.

Further, the base body includes an upper base body and a lower base body, the upper base body and the lower base body are fixed by buckling, a cavity is formed between the upper base body and the lower base body, and the drive circuit board accommodates in this cavity.

Compared with the prior art, the utility model has the following beneficial effects:

In the LED lighting fixture provided by the utility model, the heat generated by the LED substrate is exchanged with the air through the heat dissipation shell, so as to achieve the purpose of heat dissipation. Through the air guide hole, it enters the gap between the inner wall of the heat dissipation housing and the base body, so that heat exchange can be performed on the inner wall of the heat dissipation housing, and the cooling fan can accelerate the flow of air, enhance the heat dissipation effect, and effectively improve the heat dissipation efficiency.

Description of drawings

Fig. 1 is a perspective view of an LED lighting fixture provided by an embodiment of the present invention;

Fig. 2 is a heat dissipation diagram of an LED lighting fixture provided by an embodiment of the present invention.

Explanation of reference numerals: 1-lampshade, 2-radiating chassis, 3-radiating housing, 31-first air guiding hole, 32-second air guiding hole, 33-gap, 34-gap, 4-seat body, 41-upper seat Body, 42-lower seat body, 43-cavity, 44-drive circuit board, 5-power connector, 6-LED substrate, 7-cooling fan.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Fig. 1 and Fig. 2, the embodiment of the utility model provides an LED lighting fixture, which includes a lampshade 1, a heat dissipation housing 3, an LED substrate 6 fixed on the heat dissipation housing 3, and a drive circuit board 44 accommodated therein. The base body 4 is further connected with a power connector 5 at the bottom end of the base body 4 . The LED substrate 6 is provided with a plurality of light-emitting diodes, the driving circuit board 44 is connected to the power connector 5 and the LED substrate 6, and the driving circuit board 44 is obtained from the outside through the power connector 5 Electric energy to drive light-emitting diodes to emit light.

The heat dissipation shell 3 is a cylindrical hollow shell with one end open, and is made of a heat dissipation material with good electrical conductivity, such as aluminum alloy. The seat body 4 is fixed in the heat dissipation housing 3 and forms a gap 34 with the inner wall of the heat dissipation housing 3 , and a gap 34 is formed on the side wall of the heat dissipation housing 3 to communicate with the gap 34 . In this preferred embodiment, the air guide holes include a first air guide hole 31 and a second air guide hole 32. The heat dissipation housing 3 includes an opening and a top wall that are oppositely arranged. A number of first air guide holes 31 are opened on the peripheral side wall, and a number of second air guide holes 32 are opened on the peripheral side wall of the end of the heat dissipation housing 3 near the opening. Substrate6. A heat dissipation fan 7 is also arranged in the heat dissipation housing 3 , there is a gap 33 between the top surface of the base body 4 and the top wall of the heat dissipation housing 3 , and the heat dissipation fan 7 is located in the gap 33 .

In this preferred embodiment, a heat dissipation chassis 2 is also provided between the LED substrate 6 and the heat dissipation housing 3, and the heat dissipation chassis 2 is made of an aluminum substrate with good thermal conductivity. In other embodiments, the heat dissipation chassis 2 can be made of other metal materials or ceramic materials. The LED substrate 6 is fixed on the heat dissipation chassis 2 , and the heat dissipation chassis 2 is fixed on the LED substrate 6 . The heat generated by the LED substrate 6 is conducted to the heat dissipation chassis 2 , and then to the heat dissipation housing 3 through the heat dissipation chassis 2 . A heat conduction medium is also arranged between the LED substrate 6 and the heat dissipation chassis 2. In this embodiment, the heat conduction medium adopts a graphite heat conduction sheet. In other embodiments, the heat conduction medium can also use a heat conduction tape or a ceramic heat conduction plate, etc. , the heat conduction medium is used to evenly conduct the heat dissipated by the LED substrate 6 to the heat dissipation chassis 2 during operation.

Further, the base body 4 includes an upper base body 41 and a lower base body 42, both of which are made of insulating materials, such as plastic materials. The upper base body 41 and the lower base body 42 are fixed by buckling, and a cavity 43 is formed between the upper base body 41 and the lower base body 42 , and the driving circuit board 44 is accommodated in the cavity 43 . In other embodiments, the upper base body 41 and the lower base body 42 may be fixed by other methods such as gluing or screw locking.

As shown in Figure 2, when the LED lighting fixture is working, the heat generated by the light-emitting diode is conducted to the heat dissipation chassis 2 through the heat conduction medium, and then conducted to the heat dissipation housing 3 by the heat dissipation chassis 2, and the heat exchange with the air is carried out through the heat dissipation housing 3, thereby To achieve the purpose of heat dissipation. The gap 34 and the gap 33 between the inner wall of the heat dissipation housing 3 and the upper base 41 are used as guide grooves. Under the action of the heat dissipation fan 7, cold air enters the heat dissipation housing 3 from the second air guide hole 32 away from the light-emitting diodes. The gap 34 between the inner side wall and the upper base body 41 is discharged from the first air guide hole 31 through the gap 33 between the top surface of the upper base body 41 and the top wall of the heat dissipation housing 3 . The cold air entering the gap 34 and the gap 33 from the second air guide hole 32 can perform heat exchange on the inner wall and the top wall of the heat dissipation housing 3 , effectively improving the heat dissipation efficiency.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (8)

1. An LED lighting fixture, characterized in that: it comprises a lampshade, a heat dissipation housing, an LED substrate fixed on the heat dissipation housing, and a seat for accommodating a driving circuit board, and the LED substrate is provided with a plurality of light-emitting diodes , the heat dissipation shell is a hollow shell, the seat body is fixed in the heat dissipation shell and forms a gap with the inner wall of the heat dissipation shell, and the side wall of the heat dissipation shell is provided with a The gaps are connected with air guide holes, and a heat dissipation fan is also arranged in the heat dissipation housing. 2 . The LED lighting fixture according to claim 1 , wherein the air guide hole comprises a first air guide hole and a second air guide hole, and the second air guide hole is farther away from the LED substrate than the first air guide hole. 3 . 3. The LED lighting fixture according to claim 1, characterized in that: the heat dissipation housing has a top wall, there is a gap between the top surface of the base and the top wall of the heat dissipation housing, and the The cooling fan is located in this gap. 4. The LED lighting fixture according to claim 1, wherein a heat dissipation chassis is arranged between the LED substrate and the heat dissipation housing, the LED substrate is fixed on the heat dissipation chassis, and the heat generated by the LED substrate is conducted to the heat dissipation chassis. The heat dissipation chassis is then conducted to the heat dissipation shell through the heat dissipation chassis. 5. The LED lighting fixture according to claim 4, wherein the heat dissipation chassis is made of metal material or ceramic material. 6. The LED lighting fixture according to claim 4, characterized in that: a heat conducting medium is further arranged between the LED substrate and the heat dissipation chassis. 7. The LED lighting fixture according to claim 6, wherein the heat conducting medium is one of a graphite heat conducting sheet, a heat conducting tape or a ceramic heat conducting plate. 8. The LED lighting fixture according to claim 1, characterized in that: the base body includes an upper base body and a lower base body, the upper base body and the lower base body are fixed by buckles, and the upper base body and the lower base body A cavity is formed between them, and the driving circuit board is accommodated in the cavity.