Mobile processors are becoming increasingly powerful with each passing year, generating significantly more heat during operation. While the majority of smartphones rely on passive cooling by dissipating heat through the chassis, there is a growing trend towards models featuring active cooling systems. These utilise a miniature turbine to force air over the internal components.
However, there are alternative solutions, one of which Huawei intends to adopt. An insider known as Digital Chat Station, who has knowledge of the tech giant’s manufacturing processes, shared details about ongoing tests for MEMS cooling. This represents a new form of active cooling that distinguishes itself from standard turbines due to its microscopic size, near-total silence, and superior heat dissipation efficiency. The following description comes from the website of xMEMS, the manufacturer of these solutions:
This technology employs piezoelectric materials, which alter their shape when an electric charge is applied. The fan consists of a hollow cavity with protruding ventilation holes on top and a valve at the bottom. Opening the ventilation holes while the valve remains closed creates a vacuum and increases air pressure within the cavity, which is then released using the bottom valve.
The volume of air moved per cycle is negligible, yet the process repeats hundreds of thousands of times per second, displacing 39 cm³ of air every second.
xMEMS coolers next to an iPhone.
Put simply, MEMS fans act like a collection of miniature speakers. Their vibrations generate directed micro air streams to remove heat, providing precise cooling and avoiding throttling. It is anticipated that this technology could become the industry standard in the near future. Huawei appears set to integrate MEMS coolers very soon, potentially within the autumn Mate 90 lineup.
Source: xmems.com | weibo.com
