| 摘要 |
An inverter substrate 28 in whichheat generating components 26 which make up an inverter control unit 9 are mounted on a rear surface side thereof is accommodated in a case 30 which is made of a material having a good thermal conductivity in such a manner that the heat generating components 30 are closely contact with a base of the case 30. The case 30 is provided between a pair of air tanks 5, 6 which are disposed parallel to each other at an interval and on a lower side of at least either of an electric motor 2 and compressors 3, 4 in such a manner as to be oriented downwards so that the base is located at an upper position. An air flow generated by cooling fans 20, 21 which are driven by the electric motor 2 is introduced to flow along the base of the case 30 to thereby cool the heat generating components 26 via the case 30. |
