Heat pipe heat sink is an effective heat dissipation technology that utilizes the heat conduction principle of heat pipes to transfer heat from the heat source to the heat sink, and then dissipate heat into the surrounding environment. The working principle of a heat pipe radiator is based on the heat conduction effect of the heat pipe. Below, we will have a detailed understanding.
1、 Structure and Principle of Heat Pipe
A heat pipe usually consists of an enclosed space with the same material for the inner and outer walls, and welded edges. The inner wall is coated with a very thin lubricant, and the heat pipe is filled with a certain amount of working fluid, mainly in the liquid or gaseous state. The working principle of a heat pipe is as follows:
1. Evaporation section: The evaporation section is located near a heat source, which heats the working medium from a liquid to a gaseous state, absorbs heat and expands, producing a cooling effect.
2. Transfer section: The working fluid heated by the evaporation section is gradually transferred to the edge of the radiator through the transfer section, and the temperature of the working fluid in the heat pipe will also gradually decrease.
3. Condensation section: The working fluid undergoes a condensation process through the edge heat sink, changing from a gaseous state to a liquid state, and the heat energy is absorbed. At this time, the temperature of the heat sink also decreases.
4. Balance section: The working fluid flows back from the edge heat sink to the evaporation section, starting a new cycle.
2、 The working principle and characteristics of heat pipe radiators
The working principle of a heat pipe radiator is actually to apply the above heat pipe principles to the radiator, and the specific process is as follows:
1. Heat is transferred to the evaporation end of the radiator through a heat source, and the refrigerant is compressed and heated. The refrigerant changes from a liquid state to a gaseous state, absorbing heat and transferring it to the transfer section.
2. Heat is gradually transferred to the edge fins through the transfer section of the radiator, and is dissipated into the surrounding environment through radiation and convection.
After being cooled by the edge fins, the refrigerant gradually changes from a gaseous state to a liquid state, releasing a large amount of heat that is then transferred back to the evaporation end through a heat pipe for re circulation. The heat dissipated is taken away, thus achieving heat dissipation.
Unlike other traditional radiators, heat pipe radiators have the following characteristics:
1. High heat transfer efficiency, the special selection of inner wall coating and liquid refrigerant greatly improves the heat transfer effect.
2. The geometric shape of the heat sink can be customized according to needs, with flexibility and plasticity.
3. The spacing between heat sinks can be adjusted to adapt to the heat dissipation needs of different occasions.
4. The geometric size of the radiator is small, the structure is simple, the volume is miniaturized, and it is easy to integrate.
5. It can be used for thermal management of high-temperature and high-pressure resistant, high-power micro electronic devices.
Overall, heat pipe radiators are an effective, reliable, and flexible heat dissipation technology with significant energy-saving and environmental benefits, and will be applied in a wider range of fields in the future.
