| 摘要 |
PURPOSE:To enable to protect a bimorph fan, which lacks in thermal stability in itself, from heat by comparatively keeping apart from an electrical parts as well as to perform an effective cooling by a method wherein the bimorph fan is housed in a cylindrcial body to act as a wind channel provided with openings at positions, and is fixed with the cylinder body. CONSTITUTION:In a square cyliner 1 having an opening 1a toward an electrical parts to be cooled is housed a bimorph diaphrgm 2 in a direction prolonged in parallel nearly with the axial direction and the bimorph diaphragm 2 is adhesion-fixed on the top surface and undersurface of the square cylinder 1 at the upper and lower edge faces of a fixing part or an electrical connection part 3 on the bimorph diaphragm 2. When alternating-current voltage is impressed on a macromolecular piezo-electric film in the bimorph diaphragm 2 through the intermediaries of lead wires 6a and 6b and the connection part 3, the bimorph diaphragm 2 is vibrated right and left with the fixing part 3 as the supporting point, thereby enabling to send wind out toward A direction from the opening 1a, while air is being breathed in from openings 1b, 4a, 4b, 5a and 5b. By this wind, a forcible cooling for the electrical parts to be cooled, that is aimed at in this invention, is performed. |
