| 摘要 |
PROBLEM TO BE SOLVED: To reduce the weight by providing protrusions for introducing the air flow in the rotational direction of a turbo fan to the direction of the rotary shaft thereof of the lower surface of a top plate thereby enhancing the strength of the top plate and making thin the top plate. SOLUTION: Triangular prism protrusions 10 for partially restricting the gap to a turbo fan 4 are provided on the lower surface at the planar part of a top plate 1. The protrusion 10 has a surface subjected to the air flow in the rotational direction of the turbo fan 4 inclining to approach the rotary shaft of the turbo fan 4 toward the rotational direction thereof. An air flow is generated in the space between the top plate 1 and the turbo fan 4 through rotation thereof. The air flow is introduced to flow along the longitudinal wall face on the oblique side of the triangular protrusion 10. The introduced air flow strikes a fan motor 3 which is thereby cooled. Since the top plate 1 can be set horizontally, the air-conditioner body can be made thin. |
