| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor holder capable of reducing a magnetic sound by creating an oscillation which becomes an opposite phase to the oscillation of a motor as a base of the magnetic sound from a mechanical structure, and combining both oscillations.SOLUTION: An intermediate part 20 of a motor holder 12 includes: a first transmission path; and a second transmission path arranged in parallel to the first transmission path, and a path length of the second transmission path becomes a length of two times of the path length of the first transmission path. Therefore, for a specified oscillation frequency determined in accordance with the path length of the first transmission path or the second transmission path of a motor oscillation. The phase of the oscillation transmitted by one of both transmission paths is displaced by a half-wave length to the oscillation transmitted by the other one in a downstream end of both transmission paths as a contacting point of both transmission paths. Therefore, the oscillation is canceled and transmitted to an air-conditioning case in the contacting point of both, and a motor magnetic sound generated from the air-conditioning case can be reduced.SELECTED DRAWING: Figure 1 |
