| 摘要 |
PURPOSE:To prevent an accident such as an electric shock, etc., in advance and to improve safety by unitedly forming an axial part to cover the rotary shaft part of a motor positioned in a pump room to a plastics-made rotary fan to be arranged in the pump room, and arranging a metallic sleeve in the outer circumferential of such the axial part. CONSTITUTION:An axial part 26 formed by united molding in a plastics-made rotary fan 20 is provided so as to cover the outer circumference of a part, which is positioned in a pump room 23, at least in a rotary shaft 19 of a motor 18. By arranging an oil seal 24 in the outer circumference of a metallic sleeve 27 arranged in the outer circumference of the axial part 26, air tight is kept between the rotary shaft 19, which passes through a cover 21, of the motor 18 and the inside of the pump room 23. Thus, a part, which is brought into contact with water or hot water, in the pump room 23 is limited to one part of the plastics-made axial part 26 and the metallic sleeve 27 and in the rotary shaft 19 of the motor 18, there is no part brought into contact with the water at all. |
