CN201331036Y

CN201331036Y - High power LED heat radiating device

Info

Publication number: CN201331036Y
Application number: CNU2009201290129U
Authority: CN
Inventors: 潘佩昌
Original assignee: Individual
Current assignee: Shenzhen City Sener Intelligent System Co Ltd
Priority date: 2009-01-08
Filing date: 2009-01-08
Publication date: 2009-10-21
Anticipated expiration: 2019-01-08

Abstract

The utility model discloses a high power LED heat radiating device, two terminal ports of semi-hollow suqare metal heat convection tubes (1), (2) are respectively welded with a lateral face of a rectangle flat metal box (3) to form a communicating body. The generated heat when the LED lightened passes through a metal base PCB circuit board (7), the liquid in the flat metal box (3)m the semi-hollow square metal heat convection tubes (1), (2), a fin-shaped aluminum heat radiating fin (5) and the air to form the heat convection, the heat can be continuously radiated. The working fluid temperature can be detected by the temperature sensor. The utility model has advantages of rapid reduced working temperature of the LED, convenient maintenance and high reliability.

Description

The high-capacity LED heat abstractor

Affiliated technical field:

The utility model relates to high-capacity LED illuminating and heat radiating aspect, especially according to the heat abstractor that is made of Metal Substrate PCB printed circuit board (PCB), LED, half " returning " shape thermal convection current metal tube, metal fin, temperature sensor installing port.

Background technology:

Be used for the LED lamp indoor, that the road lighting aspect is commercially available at present, the major technique feature is divided into two kinds: one, be after LED is welded to aluminum base PCB printed circuit board (PCB) (industry claims the LED lamp plate) evenly distributedly and goes up, again the plane that the back side of LED lamp plate (non-LED device solder side) coated heat-conducting silicone grease and wing shape aluminium radiator fin compress, fixing; Its two, after the welding of LED and aluminum base PCB circuit board finishes, closely cooperate at the lamp plate back side and " heat pipe " hot junction of knowing altogether, " heat pipe " another condensation end seal, and organizes the parallel metal fin pass more.The purpose of one is achieved like this: when LED be energized light after, the heat that is sent distributes through LED metal heat sink, aluminum base PCB, aluminium matter wing shape sheet, air.Existing problem is: because it is based on solid thermal and conducts heat; Moreover LED metal heat sink area of dissipation is very little, and heat flow density is big; Again because of big from heat sink, aluminum base PCB plate, aluminium matter wing shape sheet, air thermal resistance, cause that heat conduction velocity is slow, LED junction temperature height, particularly can make the non-linear rising of LED junction temperature with the environment temperature rising, life-span, light efficiency, the light decay to LED is totally unfavorable like this.Its purpose of two is achieved like this: when LED lamp plate operating temperature raises, heat conducts to the hydraulic fluid in " heat pipe " by the tube wall of " heat pipe ", after the hydraulic fluid temperature raises, flash to gas, gas is diffusion rapidly in the vacuum in " heat pipe ", heat in the gas is passed to " heat pipe " outside fin, become liquid again simultaneously and get back to the hot junction, circulation is dispelled the heat repeatedly.Its existing problem is: " heat pipe " inside is that pressure is arranged for " heat pipe " air outside, no matter is malleation, negative pressure, because process materials, use occasion is changeable, in case reveal, " heat pipe " lost efficacy.Not only manufacturing process cost height, functional reliability are poor, and the user is the shortcoming that can't safeguard.

High-capacity LED heat abstractor provided by the utility model, it not only utilizes the minimum pressure of liquid internal to carry out the thermal convection current mode to conduct heat apace, make the LED working junction temperature far below the safety junction temperature, and life-span, light efficiency, the light decay technical indicator of LED are increased substantially, also possess and make the advantage simple, easy to maintenance, that reliability is high.

In order to solve above-mentioned task, the scheme that the utility model adopted is: two ports that half " returning " shape metal tube forms naturally, it is connected with the side of a flat can symmetry respectively, and the cavity of flat can and half " returning " shape metal tube two ends are communicated, and promptly forms linker.And linker filled with liquid.The plane of the back side (non-LED device solder side) of LED lamp plate being coated heat-conducting silicone grease and flat can compresses, fixes; Half " returning " shape metal tube both can be fitted with aluminium matter wing shape fin, also can pass many group parallel metal fin.Its objective is and realize like this: after LED lighted, the heat that LED produces conducted to the liquid in flat metal box wall, the box by Metal Substrate PCB circuit board, convection current diffusion rapidly behind the heated liquid in the box, and temperature constantly raises.At ordinary times, the liquid gravity difference equates in half " returning " shape metal tube two vertical tubes, because fluid temperature raises in the can of below, the gravitational difference balance is broken, in addition because the flat box placement is not the heat disorder of abswolute level, fluid, the liquid that all helps in half " returning " shape metal tube one side vertical tube rises, and the liquid in the opposite side vertical tube descends and forms convection current; Heat in the liquid conducts to fin by the upper flat pipe of half " returning " shape metal tube, and fin constantly distributes heat and air formation convection current.And along with the rising of LED temperature, the thermal convection current of liquid speeds up, and vice versa.The mode that forms dynamic thermal diffusion, convection current is dispelled the heat.Side at the metallic flat box has the temperature sensor installing port of being convenient to temperature detection.

Certainly, the flat can also can be other geometry.

From above-mentioned high-capacity LED heat abstractor, it has not only that liquid internal pressure is minimum, thermal diffusion and convection velocity is fast, the LED working junction temperature is low but also life-span, light efficiency, the light decay technical indicator of LED are increased substantially, and also possesses to make the advantage simple, easy to maintenance, that reliability is high.

Description of drawings:

Be described further below in conjunction with the accompanying drawing example.

The liquid heat convective principles figure of accompanying drawing 1 high-capacity LED heat abstractor.

Accompanying drawing 2 LED radiator structure cutaway views (dissecing a left side perpendicular to accompanying drawing 1 paper direction looks).

The specific embodiment:

Half " returning " shape metal fever convection tube (1) in the accompanying drawing 1, two ports of (2) weld with the left and right sides counterpart of rectangle flat metal box (3) respectively, cavity in half " returning " shape metal fever convection tube (1), (2) and the rectangle metallic flat box (3) is communicated, promptly form connected component.When flat metal box (3) underlaying surface temperature degree raises, cause liquid rising convection current, diffusion in the flat metal box (3).Before not heating, the liquid gravity difference equates in half " returning " shape metal fever convection tube (1), (2) two vertical tubes, because the interior fluid temperature of flat metal box (3) raises, the gravitational difference balance is broken in the vertical tube, thereby make the liquid rising in the vertical tube of half " returning " shape metal fever convection tube (1), (2) one sides, liquid in the vertical tube of opposite side descends, and forms convection current.And along with the rising of the temperature of liquid, the thermal convection current of liquid speeds up.Vice versa.Temperature sensor mounting interface (4) is to be convenient to the outside installing port that connects.

LED in the accompanying drawing 2 (6) coats heat-conducting silicone grease in the non-device side (upper surface) of Metal Substrate PCB circuit board (7) after being welded on the Metal Substrate PCB circuit board (7), fits, fixes with the lower surface of rectangle metallic flat box (3) again.After LED (6) lights, the heat that LED (6) produces, by the liquid in Metal Substrate PCB circuit board (7), flat metal box (3) wall, the flat metal box (3), half " returning " shape metal fever convection tube (1), (2), wing shape aluminium radiator fin (5), constantly heat and air formation convection current are distributed.

Claims

1, a kind of heat abstractor that constitutes by many half " returning " shape metal fever convection tubes (1), (2), rectangle flat metal box (3), temperature sensor installing port (4), wing shape aluminium radiator fin (5), a plurality of LED (6), Metal Substrate PCB circuit board (7), it is characterized in that: two ports of half " returning " shape metal fever convection tube (1), (2) weld with the left and right sides of rectangle flat metal box (3) respectively, cavity in half " returning " shape metal fever convection tube (1), (2) and the rectangle metallic flat box (3) is communicated, promptly form connected component; The sensor installing port be positioned at rectangle flat metal box (3) above, and and rectangle flat metal box (3) inner chamber communicate.