CN203099441U - Light-emitting diode (LED) bulb - Google Patents

Abstract

The utility model discloses a lighting device and particularly relates to a light-emitting diode (LED) bulb. The LED bulb is better in the heat-dissipation effect. A heat-dissipation body comprises a first heat-dissipation body and a second heat-dissipation body, wherein the upper portion of the first heat-dissipation body is attached to the bottom of a light source board, the lower portion of the first heat-dissipation body is attached to the upper portion of a power source box, cooing fins which are fin-shaped are further arranged on the first heat-dissipation body, the second heat-dissipation body encircles outside the power source box, a heat-dissipation metal ring is arranged at the bottom of the power source box in an encircling mode, external threads are arranged on the outer surface of the heat-dissipation metal ring, internal threads which are matched with the external threads are arranged at the bottom of the second heat-dissipation body, a plurality of through holes are formed in the side surface of the second heat-dissipation body, an air inlet is formed in the top of a lampshade, a plurality of air outlets are further formed in the connecting position of the bottom of the lampshade and the light source board, and wind shielding sheets which are inclined upward are arranged at the positions of the air outlets. The LED bulb is widely applied to lighting devices.

Description

led light bulb

technical field

The utility model relates to the technical field of lighting devices, in particular to an LED light bulb.

Background technique

As we all know, LED light bulb is a lamp that uses semiconductor materials to convert electrical energy into visible light. Among them, how to better dissipate heat for the light source board and the power box that supplies power to it, and effectively ensure the stable operation of the LED light bulb, is an important issue. Subject: Existing LED light bulbs mainly include a lampshade, a light source board, a power supply box, a heat sink and a lamp cap. The power supply box is provided with a power controller, and the lampshade is placed on the top of the light source board, and forms a light source cavity with the light source board. The power supply box is arranged under the light source board, the lamp head is arranged under the power supply box, and is electrically connected with the power controller and the light source board. Finned heat sinks are provided to assist heat dissipation; the heat dissipation of such LED bulbs, power boxes and light source panels is completed through the indirect conduction of heat sinks. In other words, the degree of heat dissipation largely depends on heat dissipation. body, power box and light source board, and the existing heat sink is generally glued to the power box and light source board. Therefore, even if the heat sink is provided with finned heat sinks, the LED light The cooling effect is also general.

Utility model content

In order to solve the above technical problems, the utility model provides an LED light bulb with better heat dissipation effect.

The LED light bulb of the present utility model comprises a lampshade, a light source board, a power supply box, a heat sink and a lamp cap. The power supply box is provided with a power controller, and the lampshade is placed on the top of the light source board and is surrounded by the light source board. A light source cavity, the power supply box is installed under the light source board, the lamp head is installed under the power supply box, and is electrically connected with the power supply controller and the light source board, and the heat sink includes a first heat sink body and a second radiator, the upper part of the first radiator is attached to the bottom of the light source board, and the lower part is attached to the upper part of the power supply box, and the first radiator is also provided with fins Sheet-shaped heat sink, the second heat sink surrounds the outside of the power supply box, the bottom of the power supply box is surrounded by a heat dissipation metal ring, and the outer surface of the heat dissipation metal ring is provided with external threads, so The bottom of the second radiator is provided with an internal thread that matches the external thread, the side surface of the second radiator is provided with a plurality of through holes, the top of the lampshade is provided with an air inlet, and the lampshade A plurality of air outlet holes are also provided at the connection between the bottom of the light source board and the light source board, and an upwardly inclined windshield is provided at the air outlet holes.

In the LED light bulb of the present utility model, a metal sheet is arranged inside the power supply box, and the metal sheet and the heat dissipation metal ring are connected through a heat conduction sheet penetrating the wall of the power supply box.

In the LED light bulb of the present utility model, filter screens are also provided at the through holes on the side surface of the second heat sink, as well as at the air inlet holes and the air outlet holes.

Compared with the prior art, the utility model has the beneficial effects that: the radiator includes a first radiator and a second radiator, the upper part of the first radiator is attached to the bottom of the light source board, and the lower part is in contact with the upper part of the power supply box. Fitting, the first heat sink is also provided with fin-shaped heat sinks, the second heat sink surrounds the outside of the power supply box, the bottom of the power supply box is surrounded by a heat dissipation metal ring, and the outer surface of the heat dissipation metal ring is provided with The bottom of the second radiator is provided with an internal thread that matches the external thread, the side surface of the second radiator is provided with a plurality of through holes, the top of the lampshade is provided with an air inlet, and the bottom of the lampshade is connected to the light source plate. There are also multiple air outlets at the connection, and an upwardly inclined windshield is provided at the air outlets; since the second heat sink is not attached to the surface of the power box, the power box can directly contact with the air to dissipate heat, which is not only basic It will not affect the appearance of the LED light bulb, effectively covers the power supply box, and is beneficial to the heat dissipation of the power supply box and the light source board; and the outer surface of the second heat sink is provided with through holes, so that the distance between the second heat sink and the power supply box The hot air formed in the gap between them can overflow through the through hole, which effectively increases the air flow rate between the second heat sink and the power supply box. Such cooling circulation ventilation effectively improves the heat dissipation effect of the power supply box and the light source board; In addition, according to the principle of air flow, when the upwardly flowing air passes through the air outlet at the bottom of the lampshade, the hot air in the lampshade will be taken out, while the cold air will enter through the air inlet above the lampshade, which effectively increases the air in the lampshade. The flow rate effectively improves the heat dissipation effect in the lampshade.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Figure 1, the LED light bulb of the present utility model includes lampshade 1, light source board 2, power supply box 3, radiator 4 and lamp cap 5, and power supply controller is arranged in the power supply box, lampshade covers the top of light source board, and It forms a light source cavity 6 with the light source board, the power supply box is installed under the light source board, the lamp holder is installed under the power supply box, and is electrically connected with the power supply controller and the light source board, and the radiator 4 includes a first radiator 41 and a second radiator 41. Heat sink 42, the upper part of the first heat sink is attached to the bottom of the light source board, and the lower part is attached to the upper part of the power supply box. The first heat sink is also provided with fin-shaped heat sinks, and the second heat sink surrounds On the outside of the power supply box, a heat dissipation metal ring is arranged around the bottom of the power supply box, and an external thread is provided on the outer surface of the heat dissipation metal ring. The bottom of the second radiator is provided with an internal thread that matches the external thread. The side surface of the body is provided with a plurality of through holes, the top of the lampshade is provided with an air intake hole, and the connection between the bottom of the lampshade and the light source board is also provided with a plurality of air outlet holes, and an upwardly inclined windshield is arranged at the air outlet ;Because the second heat sink is not attached to the surface of the power box, the power box can directly contact with the air to dissipate heat, which not only basically does not affect the appearance of the LED bulb, but also effectively covers the power box, and at the same time is beneficial to the power box and the light source The heat dissipation of the plate; and the outer surface of the second heat sink is provided with a through hole, so that the hot air formed in the gap between the second heat sink and the power supply box can overflow through the through hole, effectively increasing the heat dissipation between the second heat sink and the power supply box. The air flow rate between the boxes, such cooling and circulation ventilation, effectively improves the heat dissipation effect of the power supply box and the light source board; in addition, according to the principle of air flow, when the upwardly flowing air passes through the air outlet at the bottom of the lampshade, the inside of the lampshade The hot air is brought out, while the cold air enters through the air intake holes above the lampshade, which effectively increases the air flow rate in the lampshade and effectively improves the heat dissipation effect in the lampshade.

In the LED light bulb of the utility model, the inside of the power supply box is provided with a metal sheet, and the metal sheet and the heat dissipation metal ring are connected through the heat conduction sheet penetrating the wall of the power supply box. In this way, the heat inside the power supply box can be effectively released.

In the LED light bulb of the present invention, the through hole on the side surface of the second heat sink, and the air inlet and the air outlet are also provided with filter screens; in this way, the air flow speed in the second heat sink can be effectively guaranteed, and at the same time, the air flow rate in the second heat sink can be effectively avoided Impurities in the air contaminate internal structures such as power supplies.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And modification should also be regarded as the protection scope of the present utility model.

Claims (3)

1. LED bulb, comprise lampshade, light source board, power pack, radiator and lamp holder, be provided with power-supply controller of electric in the described power pack, described lampshade covers on the top of light source board, and surround a light-source chamber with described light source board, described power pack is installed in the below of described light source board, described lamp holder is installed in the below of described power pack, and be electrically connected with described power-supply controller of electric and light source board, it is characterized in that, described radiator comprises first radiator and second radiator, the top of described first radiator and the bottom of described light source board fit, and the top of bottom and described power pack fits, also be provided with the fin of fin shape on described first radiator, described second radiator is looped around the outside of described power pack, the bottom of described power pack is surrounded with the heat radiating metal ring, and be provided with external screw thread at the outer surface of described heat radiating metal ring, the bottom of described second radiator is provided with the internal thread that matches with described external screw thread, the side surface of described second radiator is provided with a plurality of through holes, the top of described lampshade is provided with air admission hole, the bottom of described lampshade and the junction of described light source board also are provided with a plurality of ventholes, and are provided with acclivitous blinker at described venthole place.

2. LED bulb as claimed in claim 1 is characterized in that the inside of described power pack is provided with sheet metal, and described sheet metal links to each other by the conducting strip that runs through described power pack box wall with described heat radiating metal ring.

3. LED bulb as claimed in claim 1 is characterized in that, the through hole of the described second radiator side surface, and the passage place of described lampshade bottom and described light source board junction also is provided with screen pack.

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