Heat Pipe Technology

What is a Heat Pipe?

Heat pipe is a kind of heat conducting element with high thermal conductivity which relies on the phase change of internal working medium for efficient heat transfer, the temperature uniformity of the heat sink base and the efficiency of fin are realized by embedding fin in the heat sink base, it transfers heat through evaporation and condensation of the working medium in a closed vacuum tube. (working medium of heat pipe includes helium and nitrogen at low temperature and liquid metals such as sodium and potassium at high temperature). The common working medium of heat pipe is ammonia, water, methanol, etc.), which makes use of the principle of capillary absorption and other fluids to achieve a good cooling effect. It has high thermal conductivity, good isotherm, high thermal conductivity, heat transfer area on both sides of cold and heat can be arbitrarily changed, heat transfer can be long-distance, and temperature can be controlled. By contacting the base of heat pipe heat sink with the core of thyristor, igbt, and other high-power power electronic devices, the heat of the core can be directly derived quickly. So as to realize the overall performance of heat sink, common types of aluminum, copper soldering heat sink has been can not meet the requirement of the thermal resistance, need to use new heat sink with heat pipe for better performance.

How does heat pipe cooling work?

Heat pipe is composed of sealing tube, suction core and steam channel. The suction core is surrounded on the wall of the sealed tube and impregnated with saturated volatile liquid. The liquid can be distilled water, ammonia, methanol or acetone. The heat pipe filled with liquid such as ammonia, methanol and acetone still has good heat dissipation ability at low temperature. How does heat pipe cooling work? When the heat pipe is running, its evaporation section absorbs the heat generated by the heat source ( power semiconductor device, etc.), making the liquid in its wick boil to steam. The heated steam moves from the evaporating section of the heat pipe to its cooling section, where it condenses into a liquid. The condensed liquid is then returned to the evaporation section through the capillary action of the suction core on the wall, so as to repeat the above cycle process of continuous heat dissipation.

Heat Pipe Type

Core parts made in heat pipe principle of low pressure is the use of liquid phase change efficient heat transfer device, its heat transfer efficiency is a traditional metal heat transfer several times to hundreds of times, can quickly take heat away from the heat source. Three common heat pipes

1. Grooved - Low Cost, does not work well against gravity

2. Wire Mesh - Most common method

3. Sintered - Highest performance and cost

Heat pipe thermal performance

Heat pipe heat transfer makes use of the heat conduction principle and the fast heat transfer property of refrigerating medium to transfer heat from heating object to heat source through heat pipe. Embedded heat pipe can realize the overall performance of the heat sink, the heat pipe technology makes the heat sink even with low speed, low air motor, and even the fan is not needed, It is completely ues the natural cooling way, also can get satisfactory cooling effect, so that the problem of air cooling heat dissipation noise and high power power module heat dissipation problems are well solved. Heat pipe air cooling also can even replace the water cooling system, to save water resources and related auxiliary equipment investment. With the improvement of Lori heat pipe technology, its reliability, safety and durability will be further improved, and the cost and price will be further reduced.The heatpipe heatsink will have the superiority which the traditional heat sink cannot compare, it opens up the new world of the heat dissipation industry.

Heat pipe advantages:

● Heat pipe heat dissipation technology has the advantages of good heat dissipation effect, relatively small thermal resistance, long service life and fast heat transfer.The thermal conductivity of heat pipe is more than 100 times that of common metal.

● Reversible heat transfer direction, regardless of any end can become the evaporation end and condensation end;

● Excellent thermal response.The vaporized steam in the heat pipe can be transmitted at a speed close to the speed of sound, thus effectively improving the heat conduction effect.

● Simple and compact structure, light weight, small size, easy maintenance;

● No power consumption, no noise, in line with the requirements of industrial "green";

● Can be used in a gravity free environment.

Heat Pipe Technology Application

Lori is a heat pipe heat sink factory, we embedded heat pipe in heat sink designs give you enhanced performance for existing heat sink by up to 50% with minimal design changes. Heat pipe solved such as high power CPU, laptop CPU far end heat dissipation, mature technology, high reliability, the cost is also rapidly reduced with the growth of the consumption, the industry has begun to widely use at present. Some manufacturers in their high power consumption IC devices, high heat flux density modules and other applications have also adopted this kind of heat dissipation problem. Heat pipe technology uses a wick structure and vertical heat sink fins to give you maximum heat dissipation with minimum footprint.

Lori heat pipe heat sink products

China Copper Heat Pipe Heat Sink

Meterial: Copper zipper fin +heat pipe +Copper base Process: Soldering +Stamping +CNC Machining

Heat Pipe Heat Sink For Medical Equipment

Meterial: Heat pipe +Aluminum zipper fin+Aluminum base Process: Soldering +Stamping +CNC Machining

Heat Pipe Heat Sink Module With Stamping Fin

Meterial: 6 Heat pipe +Aluminum zipper fin+ Copper &Aluminum base Process: Soldering +Stamping +CNC Machining

Copper Heat Pipe Soldering Heat Sink For Laptop

Meterial: 6 Heat pipe +Aluminum zipper fin+ Copper &Aluminum base Process: Soldering +Stamping +CNC Machining