| 摘要 |
A cooling fan is fitted to one of the shaft end portions of a double-end motor, and a pulley is fitted to the other end portion. A belt is passed around this pulley and a pulley fitted to a compressor element, and the compressor element is driven by this belt. The compressor element is disposed in such a manner as to be stacked up in an upward direction of the motor. An exhaust duct having a built-in cooler is also disposed in such a manner as to be stacked up above a cooling fan on the discharge side of the cooling fan. A main duct is formed on the suction side of the cooling fan and is interconnected in series with a cooling air outlet of the compressor element. These members described above are accommodated inside a casing. Therefore, two cooling air flow passages are defined on the right and left sides inside the casing.
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