HEAT DISSIPATION MEMBER HAVING VARIABLE HEAT DISSIPATION PATHS AND LED LIGHTING FLOOD LAMP USING THE SAME

• US 20100091487A1
• Filed: 02/13/2009
• Published: 04/15/2010
• Est. Priority Date: 10/13/2008
• Status: Abandoned Application

• Current Assignee: Hyundai Telecommunication Co., Ltd.
• Original Assignee: Hyundai Telecommunication Co., Ltd.
• Inventors: Shin, Sung Ho
• Application Number:
  US12/371,521
• Publication Number:
  US 20100091487A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A heat dissipation member having variable heat dissipation paths and an LED lighting flood lamp using the same are provided, which can maximize heat dissipation effect by widening an air contact area and making air flow rapidly, seek a waterproof effect and prevention of a scald due to contact with a high-temperature heat dissipation plate, and prevent the reduction of heat dissipation efficiency caused by foreign substances by keeping wings of the heat dissipation plate not exposed to an outside. The LED lighting flood lamp using a heat dissipation member having variable heat dissipation paths includes LEDs, an LED mounting substrate on which the LEDs are mounted, a heat dissipation member having a lower part to which the LED mounting substrate is fixed and provided with the variable heat dissipation paths formed thereon, an upper cap fixed to outer surfaces of heat dissipation plates of the heat dissipation member; a fixing ring member fixed to the lower part of the heat dissipation member to achieve inflow of outside air, and a lower lens fixed to a lower part of the cap.

Claims

1. A heat dissipation member comprising:

a cylindrical main body in which a through-hole is formed; and

a plurality of heat dissipation plates formed along the circumference of the main body in a length direction of the main body;

wherein the heat dissipation plates include curved heat dissipation plates arranged with curves in the length direction of the main body, and a gap between two opposite heat dissipation plates in the length direction of the main body is widened or narrowed to vary the size of a heat dissipation paths.

2. The heat dissipation member of claim 1, wherein the heat dissipation path becomes widest in a lower part of the heat dissipation member, and is narrowed as it goes to its upper part.

4. The LED lighting flood lamp of claim 3, wherein the heat dissipation member is the heat dissipation member as recited in claim 1.

8. The LED lighting flood lamp of claim 6, wherein the heat dissipation member is the heat dissipation member as recited in claim 1.

3. An LED lighting flood lamp comprising:

LEDs;

an LED mounting substrate on which the LEDs are mounted;

a heat dissipation member having a lower part to which the LED mounting substrate is fixed, and provided with heat dissipation paths formed on its circumference in a length direction of the lamp;

an upper cap fixed to outer surfaces of heat dissipation plates of the heat dissipation member, and having penetration grooves formed thereon to be communicated with the heat dissipation paths;

a fixing ring member fixed to the lower part of the heat dissipation member, and having penetration grooves formed thereon to be communicated with the heat dissipation paths to achieve inflow of outside air; and

a lower lens fixed to a lower part of the fixing ring member.

5. The LED lighting flood lamp of claim 3, wherein O-rings are installed on an upper fixing part and a lower fixing part of the heat dissipation member to improve sealing performance.

6. An LED lighting flood lamp comprising:

LEDs;

an LED mounting substrate on which the LEDs are mounted;

a heat dissipation member having a lower part to which the LED mounting substrate is fixed, and provided with heat dissipation paths formed on its circumference in a length direction of the lamp;

an upper cap fixed to outer surfaces of heat dissipation plates of the heat dissipation member; and

a lower lens fixed to a lower part of the upper cap.

7. The LED lighting flood lamp of claim 6, wherein penetration grooves are formed around a lower part of the upper cap to be communicated with penetration grooves formed on an upper side of the upper cap through heat dissipation paths.

9. A heat dissipation member comprising:

heat dissipation paths formed at predetermined intervals on the inside of an edge part of a cylindrical main body along the circumference of the main body;

wherein the heat dissipation paths include cylindrical heat dissipation paths the size of which is varied in a length direction of the cylindrical main body.

10. The heat dissipation member of claim 9, wherein the cylindrical heat dissipation path becomes narrower as it reaches the center thereof in which Bernoulli'"'"'s principle is applied.

11. The heat dissipation member of claim 9, wherein the heat dissipation paths further include straight heat dissipation paths alternately arranged in neighboring parts of the cylindrical heat dissipation paths

12. The heat dissipation member of claim 9, wherein a projection part extending downward for a specified length is formed in a center region of the heat dissipation member, and on the outside of the projection part, the fixing ring member is placed.

13. An LED lighting flood lamp comprising:

LEDs;

an LED mounting substrate on which the LEDs are mounted;

a heat dissipation member having a lower part to which the LED mounting substrate is fixed, and provided with heat dissipation paths formed at predetermined intervals on the inside of an edge part of a cylindrical main body along the circumference of the main body, the heat dissipation paths including cylindrical heat dissipation paths the size of which is varied in a length direction of the cylindrical main body;

an upper cap fixed to the upper side of the heat dissipation member;

a fixing ring member fixed to the lower part of the heat dissipation member to achieve inflow of outside air; and

a lower lens fixed to a lower part of the fixing ring member.

14. The LED lighting flood lamp of claim 13, wherein O-rings are installed on an upper fixing part and a lower fixing part of the heat dissipation member to improve sealing performance.