The “Air Power Cooler” transfers the chipset heat into air momentum, when the air becomes hot, the air will expand then push the fan to rotate and In doing so, cooling the heatsink immediately. After the air moves from the bottom to top of the piston, the air will become heavy, pushing the piston down again.
The better air piston design can transfer over 70% heat power and transfer to air power, that’s great efficiency transfer from Stirling engine theory.