Let’s briefly discuss the role of cooling fans—often even more critical than heat pipes—in laptops.
Category:
Industry Trends
Release time:
2020-12-14
How much a laptop’s performance can be unleashed hinges critically on its cooling capabilities. As one of the “three essential components” of a laptop’s cooling system, the role of the fan is unquestionable. That’s why, when choosing a laptop, many users tend to believe that the more fans there are, the better. In reality, however, numerous factors influence fan performance, and even fans that look similar can exhibit significant differences in efficiency due to these factors.
In-depth analysis Cooling fan
Among the three key components of a laptop’s cooling module, the cooling fan can largely compensate for the insufficient thermal conductivity and heat dissipation efficiency of the heat pipes and cooling fins themselves. This is precisely why, even when laptops have identical hardware configurations and seemingly similar designs in terms of the number of cooling fans, heat pipes, and cooling fins, their cooling performance can still vary dramatically.
Ensure the smooth flow of the air duct.
The cooling fans specifically designed for desktop computer processors are mostly of the axial-flow type. We can think of them as miniature electric fans that push air vertically, thereby accelerating heat dissipation from the heatsink located at their base.
The internal space of the laptop is limited, making it impossible to arrange the fan and heat sink fins vertically anymore. They can only be positioned horizontally instead. Therefore, the fan needs to blow air in a specified direction toward the side.
Therefore, cooling fans specifically designed for laptops predominantly feature a turbine structure. The fan blades are arranged in a circular pattern perpendicular to the rotating surface. During operation, air enters axially into the space enclosed by the circular fan blades and is then flung outward laterally by the centrifugal effect generated as the blades rotate, forming a swirling, diffused airflow around the outer periphery of the blades. Under the guiding influence of the airflow duct, this airflow is ejected tangentially from the air grille openings.
So, is it true that the more blades a laptop fan has, the better?
Answer: Yes, there is a critical point regarding the number of fan blades—balancing the number of blades with their spacing is essential. Packing too many blades into a space that’s too small means there won’t be enough air being pushed out. To find this optimal balance, OEM manufacturers often use industry-standard simulation software to evaluate airflow changes.
In short, it’s these very details that affect the laptop’s cooling performance and, at the same time, influence how well the laptop can deliver its full performance.
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