A cooler for electronic devices provides cool air to the inlet sides of the heat
sink by using a radial blower with blades located around air outlets of the heat
sink. This blower is driven by a brushless DC electric motor. The motor has an
opening in the center allowing for the transfer of incoming air to the center of
the heat sink. The rotors outer circumferential arrayed poles are rigidly secured
to the frame of the radial blower. The stator of the motor is rigidly secured to
the heat sink and has an opening in its center. The stator comprises circumferential
arrayed coils on circuit board material. When the current flows through the stator
coils, the coils acquire a magnetic polarity. The poles of the rotor and stator
coils attract and repel depending on the polarities. The cool air comes simultaneously
from opposite sides of the heat sink. For this reason the heat sink has a divider
located approximately in the middle of the heat sink fins. The blades of the radial
blower are located around the air outlets on the heat sink. Because the ambient
air is drawn in from both sides of the heat sink the air path length through the
heat sinks channels is effectively halved. This results in an increased cooling
ability for the heat sink because of the increase in temperature differentials.