CN201386989Y - LED illuminating lamp adopting two-stage heat dissipation - Google Patents

Abstract

The utility model provides an LED lamp, which comprises a primary heat sink with multiple inclined surfaces and a secondary heat sink connected to the primary heat sink, wherein multiple LED chips are mounted on the inclined surfaces. The secondary heat dissipation technology adopted by the LED lamp can greatly improve the heat dissipation efficiency; at the same time, the inclined surface comprises an LED chip support with a certain height, and the LED chip is seated on the support, so that the angle of the chip emitting light into space can reach up to 270° at most, which not only increases the irradiation angle, but also better guarantees the average intensity and uniformity of the light.

Description

LED lighting with secondary heat dissipation

technical field

The utility model generally relates to LED lighting fixtures, and more specifically, the utility model relates to an LED lighting lamp with high heat dissipation efficiency, large irradiation angle and uniform light intensity.

Background technique

With the development of light-emitting diode (LED) technology, more and more high-power LED lamps are designed for lighting, such as home lighting. Compared with existing lighting sources such as incandescent lamps, LED lamps have many advantages such as sufficient brightness, energy saving, high reliability, and long life, which make them have broader application prospects in the lighting field.

For high-power LEDs, the quality of heat dissipation becomes an important factor in determining their performance. In the prior art LED lamps, at least one packaged LED chip is arranged on a substrate to form a single or array light source, and at the same time, a radiator is connected to the substrate to promote heat dissipation. For example, in the Chinese Patent No. "200720141005.1" LED light bulb improved structure patent, a lamp cap is arranged outside the lamp, a light-emitting diode with a light source is arranged inside, and an enlarged heat sink with an area larger than the area of the base is attached to the bottom of the base. Chinese invention patent application CN101349415A discloses a high-power LED lamp convection heat dissipation device. and an auxiliary heat dissipation plate with auxiliary heat dissipation protrusions and air convection holes is arranged on both sides of the installation groove of the heat dissipation plate body. Although these direct-contact heat dissipation structures reduce the thermal resistance between the base and the heat sink, there is still the problem of heat accumulation when a large amount of heat is generated in a short period of time.

In addition, although these LED lamps can meet the general lighting requirements, since the LED illuminants are all located in the same plane, the emitted light has strong directivity and the irradiation range is small. Aiming at the problem of a small irradiation angle, Chinese invention patent application CN101182916A discloses an LED lamp, which includes several LEDs and an LED carrier. An inclined second LED-carrying surface on the circumference. This structure can expand the range of light emission, but since the inclined surface is discontinuous and the LEDs on the inclined surface are only located on one spherical surface, the distribution of the light intensity is not uniform.

Based on the above, it is necessary to provide an LED lighting lamp with high heat dissipation efficiency, large irradiation angle and uniform light intensity, so as to solve the problems existing in the prior art.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a new type of LED lighting lamp, which can improve the heat dissipation efficiency, increase the irradiation angle, and at the same time ensure the average intensity of the illumination to achieve a good lighting effect.

According to one aspect of the present invention, an LED lamp is provided, which includes a primary radiator and a secondary radiator, the primary radiator has a plurality of slopes, and at least one LED chip is disposed on each slope.

Preferably, the primary radiator and the secondary radiator are at least partially connected or in contact.

Preferably, the inclined planes are distributed radially and periodically around the central axis of the LED lamp, and adjacent inclined planes have different inclination angles.

Preferably, the inclined surfaces form multiple levels with different inclination angles along the radial direction, and adjacent inclined surfaces in the same level have different inclination angles.

Preferably, the slope includes an LED chip support with a certain height, and the LED chip is seated on the support.

More preferably, the height of the LED chip support is between 1.2-3mm, so that the light emitting angle around the LED chip can reach up to 270°.

Preferably, the slope angle of the slope ranges from 10° to 80°.

More preferably, the inclination angle of the slope is 15° or 75°.

More preferably, the inclination angle of the slope is 20° or 70°.

Preferably, the primary radiator is a bracket processed from metal materials.

Preferably, the secondary radiator is a cast metal material block.

Preferably, the exterior of the secondary radiator has fin-shaped fins.

Preferably, through the two-stage heat dissipation structure, the temperature of the primary radiator is kept at 80°C-120°C, and the temperature of the secondary radiator is kept below 90°C.

Preferably, a transparent plastic lampshade made of materials such as PC is arranged outside the LED chip.

To the accomplishment of the above and related ends, the invention comprises the features hereinafter fully described and particularly pointed out in the claims. The following description and accompanying drawings describe in detail certain exemplary embodiments of the invention. However, these examples are exemplary and the principles of the invention may have some equivalents to those disclosed herein.

Description of drawings

Through the following detailed description of the utility model and in conjunction with the following drawings, other objects, advantages and new features of the utility model will become apparent. In the accompanying drawings, the same reference numerals refer to the same parts, wherein:

Fig. 1 is a three-dimensional schematic diagram of an LED lamp according to a preferred embodiment of the present invention;

Fig. 2 is a side view of an LED lamp according to a preferred embodiment of the present invention;

Fig. 3 is a partially enlarged schematic diagram of an LED chip and a chip holder according to a preferred embodiment of the present invention;

Fig. 4 is a top view of an LED lamp according to a preferred embodiment of the present invention;

Fig. 5 is a partially enlarged schematic diagram of an LED chip and a terminal according to a preferred embodiment of the present invention;

Fig. 6 is a schematic diagram of circuit connection according to a preferred embodiment of the present invention.

Detailed ways

The utility model provides a novel LED lighting lamp, which comprises a base body with a plurality of inclined planes, the plurality of inclined planes are formed into at least one level, adjacent inclined planes in the same level have different inclination angles, and each inclined plane is provided with There is at least one LED chip. The LED lamp adopts two-stage heat dissipation technology to keep the temperature of the primary radiator at 80°C-120°C, and the temperature of the secondary radiator below 90°C, which can greatly improve the heat dissipation efficiency.

The LED lighting lamp of the present invention will be described in detail below with reference to the accompanying drawings.

Referring now to FIG. 1 and FIG. 2 , they are respectively a three-dimensional schematic diagram and a side view of an LED lamp according to a preferred embodiment of the present invention. The LED lamp of this embodiment mainly includes an LED chip 1, a lampshade 3, a lamp cap 12, a primary radiator 7, a secondary radiator 8, and an internal DC power supply electronic board 13 shown in a dotted line, wherein the lamp cap or lamp holder 12 is used for A 220V AC power supply is connected to power the LED lamp, which has the same specifications as the corresponding lamp base of the general lighting bulb, so that the LED lamp can conveniently replace the fluorescent lamp currently used.

The primary radiator 7 is made of metal with good thermal conductivity and certain mechanical strength, and it is used as a support for supporting LED chips or luminous bodies. Cutting, cutting and other processes form a plurality of inclined planes 15 and 15' as shown in FIG. 1 , and these inclined planes are distributed periodically or substantially radially around the central axis of the LED lamp, and are inclined downward relative to the central plane. These slopes can be made to have very good light source reflectivity through a coating process such as electroplating, thereby improving light utilization. These inclined surfaces may have the same or different inclination angles relative to the central plane, for example, these inclined surfaces may be set so that adjacent inclined surfaces have different inclination angles. For example, it can be seen from Fig. 1 that the inclination angle of the inclined plane 15' is greater than the inclination angle of the inclined plane 15. As an alternative, when the number of slopes is large enough, the two slopes separated by one or more slopes can have the same slope angle, that is, the slope angle of the slope can be changed periodically, so that the illumination of the LED illuminant in the entire circumferential direction It also changes periodically to improve the uniformity of lighting in all directions. In order to achieve the best lighting effect, it is preferable to limit the inclination angles of all inclined surfaces on the primary radiator 7 within the range of 10° to 80°, such as 10°, 15°, 20°, 30°, 45°, 60° °, 70°, 75° or 80° etc.

At least one LED chip covered by the lampshade 3 is arranged on each inclined surface as a light emitting source. The lampshade 3 can be made of transparent plastic such as PC material (ie polycarbonate), glass or polymer. According to the needs of light effect, frosted glass or other translucent plastic materials can also be used to make lampshades 3 of various shapes, so as to increase the softness of light and the aesthetics of the LED lamp. It can be seen from FIG. 2 that an insulator 5 is provided below the slope, and the inside thereof contains connecting wires formed of conductive substances. One end of the insulator such as a tubular channel 5 passes through the slope of the primary radiator 7 and is fixed therein, and the other end is connected to the PCB board 6 for supplying power to each LED chip 1 to form a power supply channel through which the power supply wire passes. The insulator can be a flexible insulating material, or an insulating material with a certain hardness, so as to play an additional role of fixing the supporting slope. Figure 3 shows the arrangement of LED chips in detail through a partially enlarged schematic diagram, wherein the LED chip 1 is arranged on the LED chip support 2 protruding from the slope by a certain height h, and the height h can be designed to be between about 1.2-3mm Therefore, the angle α at which the chip emits light into the space increases from approximately 180° to a maximum of approximately 270°, which not only increases the illumination angle, but also better ensures the average intensity of illumination.

The secondary radiator 8 and the primary radiator 7 can be respectively formed and assembled together so as to facilitate the connection of conductive wires, wherein the center of the primary radiator 7 has a through hole, and the through hole is connected to the central axis of the secondary radiator 8. Cooperate to form a stable connection. The primary radiator 7 can be processed by metal or alloy material, and the secondary radiator 8 can be a metal or alloy block formed by casting, and its exterior preferably has a considerable amount of efficient heat dissipation that can maximize the contact area with the air. winged structure 9. Through this secondary heat dissipation structure, the heat emitted by the LED chip when it is energized is first quickly taken away by the LED chip support 2 (also made of metal material) and the primary heat sink 7 and transferred to the secondary heat sink 8, Then, a better heat dissipation effect is achieved through the heat exchange between the fin-shaped structure 9 outside the secondary radiator 8 and the air. Through this two-stage heat dissipation mechanism, the temperature of the primary radiator 7 can generally be kept at 80°C-120°C, and the temperature of the secondary radiator 8 can generally be kept below 90°C. Compared with the structure in which the support body of the LED chip and the heat sink are closely combined in the prior art, this secondary heat dissipation structure not only increases the heat dissipation area, but also realizes the transformation from the primary heat sink 7 to the heat sink through the different temperatures of the two heat sinks. The rapid heat transfer of the secondary heat sink 8 avoids heat accumulation in the primary heat sink 7 and affects the performance of the LED chip. At the same time, the air around the two heat sinks will also be heated to different temperatures through the horizontal heat dissipation holes 10 and The vertical cooling holes 11 form air flow, thereby further improving the cooling efficiency.

Referring now to FIG. 4 and FIG. 5 , they are respectively a top view of an LED lamp according to a preferred embodiment of the present invention and a partially enlarged schematic diagram of an LED chip and a terminal. As shown in the figure, the LED chips are roughly periodically distributed along the circumferential direction, and the main illumination direction (ie, the direction perpendicular to the slope) of adjacent LED chips is different, thereby increasing the illumination angle of the LED lamp and increasing the average illumination intensity. According to needs, more slope levels with different inclination angles can be set on the same radial direction to achieve better lighting effects. Each LED chip is connected to two LED power line interfaces 4 through two bonding wires 20, and the bonding wires 20 are preferably gold wires commonly used in the field. The LED power line interface 4 is a small piece of metal pipe column, which is embedded in the insulator 5 to form electrical insulation with the primary radiator 7, and is electrically connected to the PCB board 6 below through the conductive wire in the insulator 5, thereby providing LED chip 1 supplies power. The internal circuit connection of the LED lamp is shown in FIG. 6 . A DC power supply electronic board 13 is arranged in the inner cavity of the LED lamp. The DC power supply electronic board 13 is also a PCB board, which includes a converter for converting AC power into DC power. This converter can use devices known in the art and will not be described in detail here. At the same time, the DC power supply electronic board also includes a control part (not shown) for controlling the current of each LED illuminant. The input end of converter is connected on the lamp cap 12 by lead 19, so that obtain the alternating current voltage of 220V from lamp cap, simultaneously the output end of converter is connected on the input end of PCB board 6 by DC power line 18, and further through PCB board 6 The output end of the LED power line interface 4 and the bonding wire 20 provide the converted DC power to the LED chip 1 .

To sum up, in the structure of the new LED lamp designed, the use of the two-stage heat dissipation mechanism can well realize the rapid heat dissipation of the LED chip, and avoid the heat accumulation on the primary heat sink to cause the performance degradation of the LED chip. At the same time, the inclined surface of the LED chip on the first-level heat sink can achieve a larger illumination angle, while the roughly periodic change or approximately symmetrical distribution of the inclined surface on the same level ensures the uniformity of the circumferential illumination, so the overall improvement is more significant. The illumination angle and average illumination intensity of LED lights.

From the foregoing description, many modifications and improvements will occur to those skilled in the art. The utility model intends to cover the content of the claims and any equivalents. The specific examples used here are to help the understanding of the present invention, and they are not used to limit the scope of the present invention in a narrower manner than the claims and their equivalents. In addition, although the specific features of the present utility model have been described above through preferred embodiments, some specific features can be changed without departing from the scope of the present utility model, for example, more than one LED chip can be arranged on each slope as required, Or the slopes on the same radial direction may be multiple slopes with different inclination angles, so as to further increase the illumination angle and average illumination intensity of the LED lamp.

Claims (16)

1, a kind of LED lamp is characterized in that: comprise one-level radiator and secondary radiator, this one-level radiator has a plurality of inclined-planes, and each described inclined-plane is provided with at least one led chip.

2. LED lamp according to claim 1 is characterized in that: described one-level radiator is connected with secondary radiator to small part.

3, LED lamp according to claim 1 is characterized in that: described a plurality of inclined-planes are radial periodic distribution around the central shaft of described LED lamp, and adjacent inclined-plane has different inclinations angle.

4, LED lamp according to claim 3 is characterized in that: described a plurality of inclined-planes radially form the different a plurality of levels in inclination angle along radiation, and the adjacent inclined-plane in the same level has different inclinations angle.

5, according to each described LED lamp among the claim 1-4, it is characterized in that: described inclined-plane comprises the led chip bearing with certain altitude, and described led chip is seated on the described bearing.

6, LED lamp according to claim 5 is characterized in that: the height of described led chip bearing is between 1.2-3mm, so that described led chip can reach 270 ° to the angle maximum of spatial emission light.

7, according to each described LED lamp among the claim 1-4, it is characterized in that: the tilt angle ranges on described inclined-plane is 10 ° to 80 °.

8, LED lamp according to claim 7 is characterized in that: the inclination angle on described inclined-plane is 15 ° or 75 °.

9, LED lamp according to claim 7 is characterized in that: the inclination angle on described inclined-plane is 20 ° or 70 °.

10, according to each described LED lamp among the claim 1-4, it is characterized in that: described one-level radiator is made by metal material.

11, LED lamp according to claim 10 is characterized in that: the support of described one-level radiator for being formed by metal material processing.

12, according to each described LED lamp among the claim 1-4, it is characterized in that: described secondary radiator is the block of metallic material of casting forming.

13, according to each described LED lamp among the claim 1-4, it is characterized in that: the outside of described secondary radiator has the fin of aliform.

14, according to each described LED lamp among the claim 1-4, it is characterized in that: the temperature of described one-level radiator remains on 80 ℃-120 ℃, and the temperature of described secondary radiator remains on below 90 ℃.

15, according to each described LED lamp among the claim 1-4, it is characterized in that: also comprise the Transparent lamp shade that is arranged on described led chip outside.

16, LED lamp according to claim 15, it is characterized in that: described lampshade is made by the PC material.

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