Patent Application
20070253202
1. Field of the Invention
The present invention relates to a LED lamp and a heat-dissipating structure thereof, and in particular to a LED lamp for illuminating and a heat-dissipating structure for transferring and dissipating the heat generated by the light emitting diode (LED).
2. Description of Prior Art
Since the LED has many advantages such as high-illumination, energy-saving and long-life etc., it is widely applied to the illumination of the electronic devices or lamps. Further, in order to increase the illuminating region and the intensity of the light of the LED, a plurality of LEDs are usually assembled together to form a LED lamp. However, with the increase in the number of the assembled LEDs and the continuous developments of the high-power LEDs, the heat generated by such LEDs is gradually increasing accordingly. Therefore, it is an important issue for those engaged in this art to provide a LED lamp that has a heat-dissipating structure and can be assembled and manufactured easily.
A conventional LED lamp, as disclosed in Taiwan Patent Application No. 94205809, mainly comprises a heat-dissipating structure, a light-emitting module and a lamp head. In this patent document, the heat-dissipating structure comprises a heat-dissipating module and a heat-conducting liquid. The heat-dissipating module has a lamp chamber. On both ends of the heat-dissipating module, the lamp chamber is formed with a first opening and a second opening, respectively. Between the first opening and the second opening, a sealed chamber is provided on the heat-dissipating module. The heat-conducting liquid is filled within the sealed chamber. The light-emitting module is provided on the second opening of the heat-dissipating module. Further, the lamp head covers on the heat-dissipating module of the light-emitting module to form a LED lamp. With the above arrangement, the heat generated by the light-emitting module can be transferred and dissipated.
However, in practice, conventional LED lamps still have the following disadvantages. Since the heat-dissipating module of the LED lamp aims to transfer and dissipate the heat generated in the front of the light-emitting module, the heat generated in the back of the light-emitting module cannot be effectively and quickly transferred to the outside. The amount of heat to be transferred is greatly limited, so that a relatively great amount of heat is accumulated in the back of the light-emitting module, causing the shortening of the life of the LED in the light-emitting module and the rapid aging and damage of the peripheral components. Further, the sealed chamber is formed by assembling the heat-dissipating module and a lamp cover, so that the manufacturing procedure of the sealing connection is very complicated. After heating, the heat-conducting liquid within the chamber generates high temperature and high pressure, which makes the heat-conducting liquid to escape from the connection portion between the heat-dissipating module and the lamp cover more easily.
Therefore, in view of the above the drawbacks, the inventor proposes the present invention entitled “LED Lamp and Heat-Dissipating Structure Thereof” to overcome the above problems based on his expert experiences and deliberate researches.
The present invention is to provide a heat-dissipating structure of a LED lamp, by which the LED can be continuously operated under a suitable working temperature and the life of the LED can thus be prolonged.
The present invention is directed to a heat-dissipating structure of a LED lamp for dissipating the heat generated by the LED. The heat-dissipating structure of the present invention comprises a first heat-dissipating body and a second heat-dissipating body. The first heat-dissipating body has a casing with an opening formed formed. The second heat-dissipating body is connected on the first heat-dissipating body and comprises at least one heat pipe and a plurality of heat-dissipating fins connected to the heat pipe.
Another, the present invention is to provide a LED lamp. With the simple assembling of all constituent elements, the manufacturing procedure can be greatly simplified and the assembling time and the cost in labor hour can be reduced.
The present invention is directed to a LED lamp comprising a heat-dissipating structure, at least one LED and a lamp head. The heat-dissipating structure comprises a first heat-dissipating body and a second heat-dissipating body. The first heat-dissipating body has a casing with an opening formed thereon. The second heat-dissipating body is connected on the first heat-dissipating body and comprises at least one heat pipe and a plurality of heat-dissipating fins connected to the heat pipe. A line-accommodating portion is provided on each heat-dissipating fin. The LED is accommodated within the casing of the first heat-dissipating body. The lamp head has a threaded terminal and an insulating cover connected to the underside of the threaded terminal. The interior of the threaded terminal is provided with two power supply lines each passing through the line-accommodating portion of each heat-dissipating fin to be electrically connected to the LED. The insulating cover covers the outside of the second heat-dissipating body and connected on the first heat-dissipating body.
The detailed description and the technical contents of the present invention will be explained with reference to the accompanying drawings. However, it should be understood that the drawings are illustrative but not used to limit the scope of the present invention.
With reference to
The heat-dissipating structure 1 comprises a first heat-dissipating body 10 and a second heat-dissipating body 20. The first heat-dissipating body 10 has a conical casing 11. The casing 11 can be made of suitable materials having excellent heat conductivity such as aluminum by extrusion or press molding. On the upper and lower sides of the casing, two circular openings 12, 13 are formed respectively. Between the openings 12 and 13 and inside the casing 11, a light-reflecting material is coated to form a reflecting surface 14. Further, a plurality of radial heat-dissipating pieces 15 project outwardly from the outer periphery of the casing 11. The top of each heat-dissipating piece 15 is formed with a stepped connecting section 151, respectively.
The second heat-dissipating body 20 is connected on the first heat-dissipating body 10 and comprises a heat pipe 21, a plurality of heat-dissipating fins 22, a fixing base 23, two positioning tubes 24, 25 and a mask 26. The heat pipe 21 is formed into an “I-lettered” shape. The bottom of the heat pipe has a plane 211, and the interior thereof is filled with a capillary structure and a working fluid. The center of each heat-dissipating fin 22 is provided with a through hole 221. An annular wall 222 extends upwardly from the periphery of the through hole 221. Both left and right sides of the through hole 221 is formed with a line-accommodating portion 223, respectively. In the present embodiment, the line-accommodating portion 223 is a through hole having an annular wall 224 extended upwardly in the periphery thereof. The heat-dissipating pieces 22 are set to superpose on one another. The top surface of each annular wall 222 or 224 is brought into contact with the bottom surface of the adjacent heat-dissipating fin 22. A heat-dissipating flowing path 225 is formed between two adjacent heat-dissipating fins 22.
The fixing base 23 has a first annular body 231 and a second annular body 232 extending upwardly from the first annular body 231. A through hole 233 is formed in the center of the first annular body 231 and the second annular body 232. Further, two fixing holes 234 are provided on the first annular body 231. The through hole 233 is adapted to be inserted by the heat pipe 21 with the end bearing the plane 211. The fixing holes 234 are adapted to be inserted by the positioning tubes 24 and 24, respectively. The heat pipe 21 and the other end of the positioning tubes 24, 25 are sequentially connected to the through hole 221 of each heat-dissipating fin 22 and the line-accommodating portion 223. Then, the mask 26 covers on the heat pipe 21, the heat-dissipating fins 22 and the positioning pipes 24, 25, so that the distal end of each positioning tube 24, 25 projects upwardly beyond the outside of the mask 26. Similarly, the positioning tubes 24, 25 are fixed on the mask 26 in such a manner that each heat-dissipating fin 22 is clamped and positioned between the fixing base 23 and the mask 26.
With reference to FIGS. 3 to 6,
The assembling procedure of the present invention will be described in the following.
First, the circuit board 511 of the light-emitting module 51 abuts against the bottom surface of the fixing base 23 of the second heat-dissipating body 20, so that the back of the LED 512 is exactly brought into contact with the plane 211 of the heat pipe 21. Then, each lead connecting to the circuit board 511 of the light-emitting module 51 is set to pass through the interior of the positioning tubes 24, 25 and project from the upside of the positioning tubes 24, 25. The leads are electrically connected to each power supply line 523 of the lamp head 52 to achieve the electrical connection between the lamp head 52 and the light-emitting module 51. Further, in order to achieve the tight contact between the circuit board 511 and the heat pipe 21, a heat-conducting medium (not shown) can be coated therebetween. Finally, the connecting section 151 of the first heat-dissipating body 10 is correspondingly connected to the connecting section 525 of the insulating cover 522, so that the light-emitting module 51 is correspondingly provided in the upper opening 12 of the first heat-dissipating body 10. The heat generated by the LED 512 is dissipated via the first heat-dissipating body 10 and the second heat-dissipating body 20, so that the LED 512 can be continuously operated under a suitable working temperature and thus its life is prolonged.
With reference to
With reference to
According to the above, the LED lamp and its heat-dissipating structure of the present invent indeed achieve the desired effects by employing the above structures. Further, since the construction of the present invention has not been published or put to public use prior to applying for patent, the present invention involves the novelty and inventive steps, and conforms to the requirements for a utility model patent.
Although the present invention has been described with reference to the foregoing preferred embodiments, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still be occurred to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.
