Patent Publication Number: US-2016230977-A1

Title: Led cooling device

Description:
TECHNICAL FIELD 
     The present invention relates to an LED cooling device, and more specifically, to an LED cooling device that increases cooling efficiency by smoothly circulating air to an LED module. 
     BACKGROUND ART 
     As an indoor lighting source in home or an office, a discharge lamp such as a fluorescent lamp, an incandescent lamp, a halogen lamp has been currently used. 
     There are problems that energy consumption is large due to the boosting of power since such a discharge lamp has a high driving voltage and discharge gas causes environmental pollution and is hardly recycled since a discharge gas such as mercury harmful to a human body or environment at the time of disposal is discharged. 
     Particularly, in the European Union (EU), the Restrictions on the use of Hazardous Substances (RoHS) that prohibits the use of heavy metal such as lead, mercury, cadmium or hexavalent chrome (Cr6+) and a toxic substance such as PBB (PolyBromideBinpenyl).PBDE (PolyBrominated Diphenyl Ether) in electrical and electronic products and the Waste Electrical and Electronic Equipment Directive (WEEE) that causes manufactures to pay fee for the recycling of waste electrical and electronic products have been legislated and have been enforced since Jul. 1, 2006. 
     Accordingly, an LED lighting device capable of being replaced with the currently used lighting device such as the incandescent lamp or the fluorescent lamp has been highly favored. 
     Such an LED has advantages such as high lighting speed and low power consumption, but has a problem that since the LED lighting device includes a plurality of LED elements, the amount of generated heat is large. Accordingly, in order to radiate the heat emitted from the LED elements, as shown in  FIG. 1 , the LED lighting device includes an LED lighting unit  200  that includes a PCB board, and a plurality of LED elements mounted on the PCB board; thermal conduction means that includes at least one thermal conduction plate  250  which transfers the heat by coming contact with or adhering to a surface of the PCB board opposite to the surface on which the LED elements are mounted; an operational-lobe heat supporting member  300  that includes a connection support  320  which is supported by being coupled to the LED lighting unit  200  and is connected to the thermal conduction plate  250 , and a supporting body  310  provided with a body having a predetermined size such that the heat transferred from the thermal conduction plate  250  is stored by an operational lobe; and heat exchanging means that is connected to the operational-lobe heat supporting member  300  to receive the heat stored in the operational-lobe heat supporting member  300  by the operational lobe and enables heat exchange with external air to radiate the heat. 
     Since several LEDs are mounted on the PCB board of the LED, the amount of generated heat is large, and thus, the heat generated inside the LED lighting device due to the use for a predetermined period of time is not smoothly discharged through the heat exchanging means. As a result, efficiency is degraded, and thus, there is a problem that the lifespan of the LED lighting device is shortened when the LED lighting device is continuously used for a long period of time. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Korean Patent Registration No. 0948955 
     DISCLOSURE 
     Technical Problem 
     In order to solve such problems in the related art, an object of the present invention is to provide an LED cooling device capable of increasing cooling efficiency by smoothly circulating air to heat exchanging means provided on a rear surface of an LED. 
     Technical Solution 
     In order to achieve the above object, the present invention provides an LED lamp which an LED which emits light is provided on one surface of a substrate and heat exchanging means which absorbs heat and radiates the absorbed heat on the other surface; a pumping member that includes a supply hole which is formed at a lower end of an outer periphery on one surface to supply air to one surface of the heat exchanging means of the LED lamp, an introduction hole which is formed at the center of an upper end in order to allow air to be introduced, and a check valve which is formed at the introduction hole to control the introduction of the air; an operational lobe that is provided at the center of a lower end of the pumping member at a predetermined length; and a transfer unit that moves the operation lobe up and down to expand and contract the pumping member. 
     A corrugated pipe may be formed at a center of a lower end of the pumping member with a predetermined length, and the operational lobe may be connected to one surface of the corrugated pipe. 
     A second supply hole connected to the pumping member may be formed in the operational lobe. 
     Pumping members may be provided at both ends of the operational lobe. 
     Effect of the Invention 
     According to the LED cooling device of the present invention, the cooling device that supplies the air to the heat exchanging means that absorbs the heat of the LED and radiates the heat is provided, and thus, the air is smoothly circulated to the heat exchanging means that absorbs the heat and the radiates the heat. Accordingly, it is possible to increase the cooling efficiency. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a cut-off perspective view showing an LED of the related art. 
         FIG. 2  is a cut-off perspective view showing an LED cooling device of the present invention. 
         FIG. 3  is a sectional view showing the LED cooling device of the present invention. 
         FIG. 4A  is a cut-off perspective view showing a check valve of the present invention. 
         FIG. 4B  is an enlarged view of portion “A” in  FIG. 3 . 
         FIGS. 5A and 5B  show operation examples of the check valve of the present invention. 
         FIG. 6  shows another embodiment of the LED cooling device of the present invention. 
         FIG. 7  shows still another embodiment of the LED cooling device of the present invention. 
         FIGS. 8A and 8B  show usage examples of the LED cooling device of the present invention. 
     
    
    
     BEST MODE 
     Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before the description, terms and words used in the present specification and claims are not interpreted as the meaning generally used in the dictionary, but should be interpreted as the meaning and concept coincident with the technological sprit of the present invention on the basis of a fundamental rule that an inventor can suitably define the concept of corresponding terms to describe his or her invention using the best method. 
     Accordingly, embodiments described in the specification and configurations illustrated in the drawings are merely preferred embodiments of the present invention, and do not wholly represent the technical sprit of the present invention. Therefore, it should be appreciated that various modifications and equivalents to these embodiments are possible at the time of filing the present application. 
       FIG. 2  is a cut-off perspective view showing an LED cooling device of the present invention,  FIG. 3  is a sectional view showing the LED cooling device of the present invention,  FIG. 4A  is a cut-off perspective view showing a check valve of the present invention,  FIG. 4B  is an enlarged view of portion “A” in  FIG. 3 ,  FIGS. 5A and 5B  show operation examples of the check valve of the present invention,  FIG. 6  shows another embodiment of the LED cooling device of the present invention,  FIG. 7  shows still another embodiment of the LED cooling device of the present invention, and  FIGS. 8A and 8B  show usage examples of the LED cooling device of the present invention. 
     As shown in  FIGS. 2 and 3 , an LED cooling device  1  of the present invention includes an LED lamp  10  in which an LED  12  which emits light is provided on one surface of a substrate  11  and heat exchanging means  14  which absorbs heat and radiates the absorbed heat on the other surface, a pumping member  20  that includes a supply hole  22  which is formed at a lower end of an outer periphery on one surface to supply air to one surface of the heat exchanging means  14  of the LED lamp  10 , an introduction hole  24  which is formed at the center of an upper end in order to allow air to be introduced, and a check valve  25  which is formed at the introduction hole  24  to control the introduction of the air, an operational lobe  30  that is provided at the center of a lower end of the pumping member  20  at a predetermined length, and a transfer unit  40  that moves the operation lobe  30  up and down to expand and contract the pumping member  20 . 
     The heat exchanging means  14  of the LED lamp  10  is an air-cooling or water-cooling heat radiation plate which is generally used. 
     As shown in  FIGS. 4A and 4B , the check valve  25  has a structure in which a contact plate  25 - 4  that is moved up and down is provided inside a pipe  25 - 2  provided with a penetrating hole  25 - 1  in a lateral surface. 
     The check valve  25  is provided inside the pumping member  20  to correspond to the introduction hole  24 , and controls the introduction hole  24  of the pumping member  20  by the expansion and pressure of the inside of the pumping member  20  when the operational lobe  30  connected to the transfer device  40  is moved up and down. 
     That is, as shown in  FIG. 5A , when the operational lobe  30  connected to the transfer device  40  is moved downward, the pumping member  20  is pulled, and an expansion pressure is generated in the inside of the pumping member  20 . In this case, the contact plate  25 - 4  provided in the pipe  25 - 2  is moved downward by the expansion pressure, and thus, the introduction hole  24  of the pumping member  20  is opened to allow the air to be introduced. As shown in  FIG. 5B , if the operational lobe  30  connected to the transfer device  40  is moved upward, the pumping member  20  is pressurized, and thus, the contact plate  25 - 4  provided in the pipe  25 - 2  is moved upward by the internal pressure. As a result, the introduction hole  24  of the pumping member  20  is closed, and thus, the air is prevented from being discharged. 
     As stated above, the check valve  25  may have various structures such as a structure in which the check valve is opened or closed by the pressure of the air. 
     It is preferable that the transfer device  40  is realized as a solenoid device using magnetic force such that the operation lobe  30  can be moved up and down. 
     As mentioned above, it is preferable that a corrugated pipe  28  having a predetermined length is formed at the center of the lower end of the pumping member  20  such that the internal pressure and expansion of the pumping member  20  are more easily performed by the operational lobe  30  and the operational lobe  30  is connected to one surface of the corrugated pipe  28 . 
     That is, the corrugated pipe  28  of the pumping member  20  connected to the operation lobe  30  is formed, and thus, a space to which the air can be introduced becomes large, and the contraction and expansion are easily performed by the corrugated pipe  28 . 
     As mentioned above, it is preferable that the amount of heat which is generated in the heat exchanging means  14  of the LED lamp  10  and is introduced to the pumping member  20  is minimized when the pumping member  20  is expanded by operating the operational lobe  30  connected to the transfer device  40  and the inner diameter of the supply hole  22  of the pumping member  20  is less than the inner diameter of the introduction hole  24  of the pumping member  20  such that the heat can be easily supplied to the heat exchanging means  14  of the LED lamp  10 . 
     As described above, it is preferable that the supply hole  22  of the pumping member  20  is formed so as to correspond to the heat pipe device  14  of the LED lamp  10 , and as the supply hole, a plurality of supply holes may be formed so as to be separated at predetermined distances. 
     As stated above, as shown in  FIG. 6 , a second supply hole  34  connected to the pumping member  20  is formed in the operation lobe  30  such that the air can be further supplied to the heat pipe device  14  of the LED lamp  10 , and the air is supplied to the heat exchanging means  14  of the LED lamp  10 . Accordingly, air circulation to the heat exchanging means  14  is further increased, and thus, a cooling effect is increased. 
     Similarly to the supply hole  22  of the pumping member  20 , it is preferable that the inner diameter of the second supply hole  34  is less than the inner diameter of the introduction hole  24  of the pumping member  20 . 
     That is, as stated above, the supply hole  22  and the second supply hole  34  serve as nozzles, and easily circulate heat to the heat exchanging means  14  of the LED lamp  10 . Accordingly, cooling efficiency is increased. 
     As mentioned above, as shown in  FIG. 7 , the pumping members  20  are provided at both ends of the operation lobe  30  such that the air can be further supplied to the heat exchanging means  14  of the LED lamp  10 . 
     That is, the pumping members  20  are provided at both ends of the operational lobe  30  provided at one transfer device  40 , and the air is supplied to the heat exchanging means  14  of the LED lamp  10  in both directions by the expansion and contraction of the pumping member  20 . Thus, the cooling effect of the heat exchanging means  14  can be further increased. 
     As the usage example of the LED cooling device  1  of the present invention, as shown in  FIGS. 8A and 8B , the LED cooling device  1  of the present invention includes an LED lamp  10  in which an LED  12  which emits light is provided on one surface of a substrate  11  and heat exchanging means  14  which absorbs heat and radiates the absorbed heat on the other surface, a pumping member  20  that includes a supply hole  22  which is formed at a lower end of an outer periphery on one surface to supply air to one surface of the heat exchanging means  14  of the LED lamp  10 , an introduction hole  24  which is formed at the center of an upper end in order to allow air to be introduced, and a check valve  25  which is formed at the introduction hole  24  to control the introduction of the air, an operational lobe  30  that is provided at the center of a lower end of the pumping member  20  with a predetermined length, and a transfer unit  40  that moves the operation lobe  30  up and down to expand and contract the pumping member  20 . 
     As described above, in the LED cooling device  1 , if the operational lobe  30  connected to the transfer device  40  is operated downward, the check valve  25  of the pumping member  20  opens the introduction hole  24  of the pumping member  20  by the expansion pressure generated inside the pumping member  20 , and thus, the air is introduced to the inside of the pumping member  20  through the introduction hole  24  of the pumping member  20  and the supply hole  22  of the pumping member  20 . If the operational lobe  30  connected to the transfer device  40  is operated upward, the check valve  25  of the pumping member  20  closes the introduction hole  24  of the pumping member  20  by the contraction air generated inside the pumping member  20 , and thus, the air is supplied to the heat exchanging means  14  of the LED lamp  10  through the supply hole  22  of the pumping member  20  to cool the heat exchanging means  14 . 
     As described above, according to the LED cooling device of the present invention, the cooling device that supplies the air to the heat exchanging means that absorbs the heat of the LED and radiates the heat is provided, and thus, the air is smoothly circulated to the heat exchanging means that absorbs the heat and the radiates the heat. Accordingly, it is possible to increase the cooling efficiency. 
     
       
         
           
               
             
               
                   
               
               
                 Description of Reference Numerals 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 1: LED cooling device 
               
               
                   
                 10: LED lamp 
               
               
                   
                 14: heat exchanging means 
               
            
           
           
               
               
               
            
               
                   
                 20: pumping member 
                 22: supply hole 
               
               
                   
                 24: introduction hole 
                 25: check valve 
               
               
                   
                 25-2: pipe 
                 25-4: contact plate 
               
            
           
           
               
               
            
               
                   
                 28: corrugated pipe 
               
            
           
           
               
               
               
            
               
                   
                 30: operational lobe 
                 34: second supply hole 
               
            
           
           
               
               
            
               
                   
                 40: transfer device