CN201696914U - High Power LED Lighting Fixtures - Google Patents

Abstract

The utility model discloses a high-power LED lighting fixture, which comprises a heat dissipation copper base plate, a cover plate and a lens, and is characterized in that it also includes a copper clad plate, an LED chip and a heat dissipation fin, and a circular recess is arranged on the upper side of the heat dissipation copper base plate. groove, a copper-clad laminate is arranged horizontally in the circular groove, and two LED chips are arranged symmetrically inside the copper-clad laminate. connection, an optical cover is installed vertically above the two LED chips, and a lens that completely covers the groove is arranged above the circular groove, and the edge of the lens is pressed and fixed with a cover plate. The lower side is equipped with multi-layer cooling fins. The utility model solves the problem of poor heat dissipation and sealing effect of the LED lighting fixture in the prior art, and provides a high-power LED lighting fixture with a simple structure, good heat dissipation and sealing effect, and not easy to be broken and damaged.

Description

High Power LED Lighting Fixtures

technical field

The utility model relates to an LED lighting fixture, in particular to an LED lighting fixture which has good heat dissipation effect and is waterproof and not easily damaged.

Background technique

Traditional road lighting mostly uses high-pressure sodium lamps, but with the development of technology, LED lamps have been widely used in various lighting fields due to their advantages such as high luminous efficiency, low power consumption, no need for high voltage, and high safety. When some large areas are illuminated (such as headlights, street lights, tunnel lights, square lighting, factory lighting, park lights, etc.), the power of LED lights is relatively high at this time, and the life of LED light sources is closely related to the operating temperature of nodes. At present, only 15% to 25% of the electric energy of the LED lamp is converted into light energy during the working process, and the rest of the electric energy is almost converted into heat energy, which makes the temperature of the LED lamp rise, and the reliability of the LED lamp will be reduced by half every time the temperature increases by 10 degrees. . Especially in high-power LEDs, heat dissipation is a big problem. If the heat dissipation is not good, it will directly lead to rapid aging of the LED, and the stability will be reduced. At the same time, if the heat dissipation is not good, it will cause serious light decay and affect the life of the lamp. The heat dissipation method in the prior art uses fans to dissipate heat to meet the heat dissipation requirements of high-power LED lights. This method has obvious technical defects, because the basic life of LED lights is 50,000 hours, and the life of fans is difficult to meet such a long time. Needed, once the fan does not work normally, the high-power LED lamp will be damaged, and the installation of the fan device increases the consumption of energy, resulting in a waste of energy. At the same time, the interior of the lamp now uses aluminum plate heat dissipation structure, die-casting parts and other heat dissipation parts to help the LED dissipate heat, which makes the lamp head too heavy and not suitable for hanging on the existing lamp post. In addition, in order to reduce costs, most products use thermal paste for heat dissipation, which will cause greater attenuation of the LED light source and cannot be widely used in large-area lighting.

At the same time, the structure of the current LED lighting fixture is complicated, and after a long time of use, the sealing effect will become poor, and water is easy to enter the lampshade, which will affect the service life of the LED lighting fixture. In addition, because the connecting modules of LED lighting fixtures are assembled with different materials, after a long period of lighting use, the entire temperature of the LED lighting fixtures is constantly changing, and it is very easy to cause connections due to the different thermal expansion and contraction coefficients of various materials. The crack damage of the position will affect the use of LED lighting fixtures.

Utility model content

In order to solve the problems in the prior art, the utility model provides a high-power LED lighting fixture with simple structure, good heat dissipation and sealing effect, and not easy to break and damage.

In order to achieve the above object, the technical scheme that the utility model takes is:

A high-power LED lighting fixture, including a heat dissipation copper substrate, a cover plate and a lens, is characterized in that it also includes a copper clad laminate, an LED chip and a heat dissipation fin, and a circular groove is opened on the upper side of the heat dissipation copper substrate, and a circular groove is formed on the circular groove. A copper-clad laminate is arranged horizontally in the groove, and two LED chips are arranged symmetrically inside the copper-clad laminate. An optical cover is installed vertically above the LED chips, and a lens that completely covers the groove is arranged above the circular groove. The edge of the lens is pressed and fixed with a cover plate. Layer cooling fins.

The aforementioned high-power LED lighting fixture is characterized in that: the copper-clad laminate has a four-layer structure, which are copper plate, insulating plate, insulating plate, and copper plate in sequence, and the LED chip is arranged between the two layers of insulating plates.

The aforementioned high-power LED lighting fixture is characterized in that a waterproof gasket is provided at the position where the lens contacts the circular groove.

The aforementioned high-power LED lighting fixture is characterized in that two through holes are symmetrically opened on the circular groove of the heat dissipation copper substrate, and the wires drawn from the positive and negative poles of the two LED chips pass through the two through holes respectively. hole, and a sealing ring that fits closely with the through hole is provided on the outside of the wire.

The aforementioned high-power LED lighting fixture is characterized in that: the lighting wattage of the LED chip is 3W-10W.

The beneficial effects of the utility model are:

1. In this utility model, the LED chip is arranged in the copper-clad laminate, and the copper-clad laminate is used to dissipate heat once. At the same time, the heat transferred is transferred to each layer of heat-dissipating fins by the copper substrate for further heat-dissipation. Through the heat exchange between the heat-dissipating fins and the air, the The heat escapes. It has efficient conduction and heat dissipation capabilities.

2. The utility model is provided with a waterproof gasket at the position where the lens is in contact with the circular groove, and a sealing ring is provided between the wire and the opening of the circular groove, which has a good sealing effect and prolongs the life of the LED lighting fixture. service life.

3. In the utility model, the outermost layer of the copper clad laminate is a copper plate structure, which is in contact with the circular groove of the heat dissipation plate. Because copper is used between the two, they have the same coefficient of thermal expansion and contraction, so after a long time Over time, the copper clad laminate and the copper substrate will not be broken and damaged, and the service life is longer.

Description of drawings

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

Detailed ways

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

As shown in Figure 1, a high-power LED lighting fixture includes a heat-dissipating copper substrate 1, a copper-clad laminate 3, an LED chip 4, a lens 6, a cover plate 8, and a heat-dissipating fin 9, and the lighting wattage of the LED chip 4 is 3W~ 10W. The copper clad laminate 3 has a four-layer structure, which are copper plate, insulating plate, insulating plate, and copper plate in sequence. Two LED chips 4 are symmetrically arranged between the two layers of insulating plates. There is a circular groove 2 on the upper side of the copper substrate 1, and solder is placed in the circular groove 2. The copper plate at the bottom of the copper clad laminate 3 is placed horizontally on the solder in the circular groove 2, and the heat dissipation of the copper clad laminate 3 is placed. The copper substrate 1 is placed in an oven, the heating temperature is 180°C to 200°C, and the heating time is 28 minutes to 32 minutes to fully dry and compact to form an overall structure. An optical cover 5 is installed vertically above the two LED chips 4, and a lens 6 that completely covers the groove is arranged above the circular groove 2. Waterproof gasket 7 is arranged, and the edge place of lens 6 is pressed and fixed with cover plate 8. The positive and negative poles of the two LED chips 4 are respectively connected to the wires, and two through holes are symmetrically opened on the circular groove 2 of the heat dissipation copper substrate 1, and the wires drawn from the positive and negative poles of the two LED chips 4 pass through respectively. Pass through two through holes, and a sealing ring closely fitted with the through holes is provided on the outer side of the wire. Multi-layer heat dissipation fins 9 are installed on the lower side of the heat dissipation copper substrate 1 for heat dissipation. When the utility model is illuminated, in order to facilitate the needs of different illumination brightness, several can be arranged side by side.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (5)

1. A high-power LED lighting fixture, comprising a heat-dissipating copper substrate, a cover plate and a lens, characterized in that: it also includes a copper-clad laminate, an LED chip and a heat-dissipating fin, and a circular groove is provided on the upper side of the heat-dissipating copper substrate. A copper-clad laminate is arranged horizontally in the circular groove, and two LED chips are arranged symmetrically inside the copper-clad laminate. An optical cover is installed vertically above the two LED chips, and a lens covering the entire groove is arranged above the circular groove. There are multiple layers of cooling fins. 2. A high-power LED lighting fixture according to claim 1, characterized in that: the copper-clad laminate has a four-layer structure, which are copper plate, insulating plate, insulating plate, and copper plate in sequence, and the LED chips are arranged on two layers between insulating boards. 3. A high-power LED lighting fixture according to claim 2, characterized in that a waterproof gasket is provided at the position where the lens contacts the circular groove. 4. A high-power LED lighting fixture according to claim 3, characterized in that: two through holes are symmetrically opened on the circular groove of the heat dissipation copper substrate, and the positive and negative poles of the two LED chips lead out The wires pass through the two through holes respectively, and a sealing ring closely matched with the through holes is provided on the outer side of the wires. 5 . The high-power LED lighting fixture according to claim 4 , wherein the lighting wattage of the LED chip is 3W˜10W.