| 摘要 |
PURPOSE:To make an entire width of a blowing outlet effective and reduce a resistance in air passage by a method wherein a control wall is formed in an outer frame wall of the blowing outlet port. CONSTITUTION:Rotating centers of two fins 4 of a plurality of parallel arranged fins 4 which are rotatable are installed at the uppermost upstream side of air flow of the fins 4 and the structure is made such that the extremity ends thereof are located near the centers of rotation and the outer frame wall 2 of the blowing port 1 has control walls 6 and 7 with an inclination surface 12 which is parallel with a plane of the fin at one end thereof. With this arrangement, when the fins 4 are inclined at a desired blowing angle, the flow near the outer frame wall 2 is curved smoothly with one linear surface composed of the control walls 6 and 7 and the fins 4, and in turn the flow of air near the other outer frame wall 2 is guided smoothly to the control walls 6 and 7 and into the flow passage between the fins 4, resulting in that an entire width of the blowing outlet 1 is made effective and further the resistance in air passage can be reduced less than that of the conventional system. |
