Patent Publication Number: US-2011069501-A1

Title: LED recessed light with heat dissipation

Description:
FIELD OF THE INVENTION 
     The present invention relates to an LED recessed light with heat dissipation, and in particular to an LED recessed light capable of increasing the heat dissipation of the LED illumination. 
     DESCRIPTION OF THE RELATED ART 
     Since light emitting diodes (LEDs) feature the high brightness, power saving and long life expectancy advantages, they have been used extensively for the illumination of lamps. Several LED lamps are usually connected to form an LED lamp set, and the position of each lamp can be adjusted to achieve an illumination effect to meet the requirements for a large projecting area and a high brightness. These LED lamp sets are used as illuminating devices indoors and outdoors. However, it is necessary to plan the LED lamps and the layout of different projecting areas, so as to differentiate the projecting area for each LED lamp with a different distance from the LED lamp and the projecting area, and prevent an uneven brightness of the light projected from the LED lamps onto the projecting areas. Therefore, it is an important subject for manufacturers in the related field to design an LED lamp with good directionality and even brightness. 
     As is generally known in the art, use has been made of varying kinds of illumination lamps for lightening or illuminating objects at night or indoors. Such illumination lamps are supplied with electric energy from a power source and convert the electric energy to light energy, thereby producing a beam of light for illumination. Typical examples of the illumination lamps include a glow lamp and a fluorescent lamp. 
     Widely used in recent years is a Light Emitting Diode (LED) illumination lamp that has a benefit of providing illumination of different colors, although higher in price than the typical lamps referred to above. However, the LED illumination lamp poses a drawback in that it tends to be heated up and shows decreased efficiency when used for more than a predetermined time period. Use of the LED lamp for a prolonged period of time may result in excessive heat generation, thus shortening the life span of the lamp. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide an LED recessed light with heat dissipation capable of increasing the heat dissipation of the LED illumination. 
     To achieve the above-mentioned object, the present invention includes a heat sink base having a first surface and a second surface. An LED illumination module, which includes a print circuit board mounted on the first surface of the heat sink base and a plurality of LED arranged on the print circuit board. A sleeve is mounted on the first surface of the heat sink, so as to the LED illumination module is located within the sleeve. And a transparent board is arranged at the sleeve for covering the LED illumination module. 
     Therefore, the heat energy from the LED illumination module may be dissipated through the heat sing base. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of an LED recessed light with heat dissipation of the present invention 
         FIG. 2  is a cross-sectional view of assembly drawing of the  FIG. 1 . 
         FIG. 3  is a second preferred embodiment of the heat sink base of LED recessed light with heat dissipation. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIG. 1  and  FIG. 2 , an LED recessed light with heat dissipation of the present invention includes a heat sink base  10 , an LED illumination module  12 , a sleeve  14  and a transparent board  16 . 
     The heat sink base  10 , which is integrally having a first surface  18 , a second surface  20  and a cylinder  22  formed in the central of the heat sink base  10 , the first surface  18  has first fixed holes  26  and third fixed holes  27 , the cylinder  22  has a plurality of heat sink sheet  24 . 
     The LED illumination module  12 , which includes a print circuit board  28  mounted on the first surface  18  of the heat sink base  10  and a plurality of LED  30  arranged on the print circuit board  28 , the print circuit board  28  has second fixed holes  32  correspond to the first fixed holes  26  of the heat sink base  10 , so as to the print circuit board  28  may mounted at the heat sink base  10  through the second screwed element  40 . 
     The sleeve  14  is a hollow body, one end of the sleeve  14  is formed with a flange  34 , which has forth fixed holes  36 , and another end of the sleeve  14  is formed with a open  35 , so that the sleeve  14  may mounted at the heat sink base  10  through a first screwed element  38 , thus, the LED illumination module  12  is located within the sleeve  14 . 
     The transparent board  16  is arranged at the open  35  of the sleeve  14  for covering the LED illumination module  12 . 
     Please referring to  FIG. 3  is a second preferred embodiment of present invention, wherein the cylinder  22  of the heat sink base  10  has a hollow penetrated the first surface  18  to the second surface  20  of the heat sink base  10 , so as to the recessed light of the present invention may reduce the weight to enhance the convenient of the manufacturing. 
     While the present has been described by way of an example and in terms of a preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment. To the contrary; it is intended to cover various modifications. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modification.