| 摘要 |
PURPOSE:To insulate noise generated with disturbance of flow and to reduce the noise by dividing a guide wall in a spiral chamber into an inner guide wall and an outer guide wall and forming space part between the inner and outer guide walls. CONSTITUTION:An impeller 17 is driven with a motor 16, and also the air flow fed out from the impeller 17 is guided to a gas exhaust hole 23 by the spiral chamber 18. The guide wall in the spiral chamber 18 is divided into the inner guide wall 19 and the outer guide wall 20, and the space part 21 is formed between these inner and outer guide walls 19, 20. As the result, the noise generated by the disturbance of flow is insulated and can be reduced. |
