Patent ID: 7863854

Claim:
A heat exchange cooler comprising: an outside air passage for exchanging heat by circulating outside air through a heat exchanging element, the outside air passage including: an outdoor fan; and an outdoor motor for driving the outdoor fan; an internal air passage for exchanging heat by circulating air in a heat generating element storing box through the heat exchanging element, the internal air passage including: an indoor fan; an indoor motor for driving the indoor fan; a position detector for detecting a rotor position of the outdoor motor; a controller for sending a driving signal of the outdoor motor according to an output from the position detector; and an inverter circuit for driving the outdoor motor according to the driving signal; a power circuit driving device including: a commercial power transformer which transforms AC voltage supplied from the heat generating element storing box to a specified range of voltage; and a tap switching unit for automatically switching a plurality of taps disposed at a coil of the commercial power transformer in order to adjust an output of the commercial power transformer within the specified range of output voltage, wherein the outdoor motor is a sensor-less DC brushless motor, the outside air passage and the inside air passage are cut off from each other, and the outdoor motor is driven via a driving lead from the inverter circuit.