Applications of Heat Pipe for LED

1.       Heat pipe life issues

The lifespan of heat pipe is more than 10 years in general, in the harsh environment must ensure that its heat pipe to be done outside plating. Because copper is easily oxidized, the problems are sealing is not good, leaks. Brass fail, it is not heat thermal when doing hot water test. Heat pipe cooling process was found partially recessed, and it is visible, thus this pipe is damaged.

2.       Heat pipe patent issues

Heat pipes have been used for half a century, the patent can be said full of the anywhere. However, they are no binding to the consumer, they just for the heat pipe manufacturer, so there is no risk. And the large heat pipe manufacturers own patents are relatively adequate. Manufactured products are in line with the technical requirements, both to protect themselves and the customer.

3.       Heat pipe bending consumes problems.

Heat pipe bends will reduce the thermal conductivity, mainly due to the heat pipe wall damage, excessive bending causes the inner copper layer staggered, Loss of capillary liquid circulation, generally one time bending consumes 5%. So non-excessive bending in the process design.

4.       Heat Pipe power problems

Optimum length of the heat pipe heat transfer at about 160-250mm, best thermal state is single intermediate endothermic, ultra-heat side to maintain the direction of gravity. Single 6mm diameter pipe is generally able to withstand 25-35W, single 8mm diameter pipe can withstand 30-45W. You need to notice when designed an optional number of heat pipes, the sum of the power must more than LED chips, to prevent the impact of the heat pipe thermal power is not enough.

5.       The length of the heat pipe issues

Many manufacturers design the heat pipe longer than the actual processing capacity of the heat pipe, the best producer of heat pipe manufacturers within a length of 400mm. Those of more than 400mm pipe are extension pipe, generally the manufacturers can make 450mm heat pipe, no more than 600mm.

6.       LED heat pipe applications

Small power of LED (less than 10W) is generally not need to use the heat pipe for thermal conductivity. Generally through die casting can solve the heat sink problem. If It is the great power then must look at your LED arrangement of particles, the particles integrated heat pipe is the best use of thermally conductive material, can be said to be the preferred.