| 摘要 |
PURPOSE:To increase reliability by a method wherein a hole, communicating a motor chamber with a flow path, is provided to flow suction gas, whose amount is necessary to cool the motor at the minimum, into an air gap and bypass the remaining gas into a suction chamber. CONSTITUTION:A part of the suction gas, introduced into the motor chamber 19, passes through the air gap 25 and a venting hole 28, as shown by arrow signs, thereafter, is turned to pass through the flow path 26 and is sucked into the suction chamber 6. The remaining suction gas enters into the flow path 26 directly through the communicating hole 29 and is sucked into the suction chamber 6. Consequently, the flow amount of the suction gas, colliding against an oil reservoir 23, is small and the flow speed thereof is also low, therefore, the scattering of oil may be prevented. |
