Patent ID: 8821131

Claim:
An air compressor comprising: a main body cover having a front plane and a rear plane; a pair of air tanks for storing compressed air extending along each other; a compressing unit that compresses air sucked from an external space so as to supply the compressed air to the air tanks; a motor coupled to the compressing unit so as to drive the compressing unit, wherein the motor and the compressing unit are arranged above the pair of air tanks; a control circuit unit that includes a semiconductor switching element for controlling driving operation of the motor arranged above the pair of air tanks, the semiconductor switching element generates heat when the semiconductor switching element controls the driving operation of the motor, the control circuit unit contains a storage case for storing a circuit board therein; a first cooling fan that generates a first air flow, wherein the first cooling fan is provided on one end of a rotation shaft of the motor and is disposed between the control circuit unit and the motor along an axial direction of the motor; and a second cooling fan that generates a second air flow, wherein the second cooling fan is provided on the other end of the rotation shaft of the motor, wherein the motor, the first cooling fan and the control circuit unit are disposed in the main body cover and the control circuit unit is placed between a wall portion of the main body cover having a wind window and the first cooling fan so that either a portion or an overall portion of the storage case is positioned to overlap with an axial direction projection area of the first cooling fan, wherein a semi-spherical and cylindrical-shaped fan guide is provided on one end side of a housing of the motor, and the fan guide is located outside the first cooling fan and guides the air flow of the first cooling fan to a stator coil portion, wherein the first air flow is sucked into an interior portion of the main body cover and the fan guide via the front plane and is exhausted from a side portion of the motor by the fan guide, and wherein the second air flow is exhausted from inside the main body cover to the external space via the rear plane of the main body cover.