| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric bimorph fan aimed at reducing weight and noise as well as improved air blowing efficiency by eliminating oscillation propagation loss. SOLUTION: A bimorph elastic portion and an oscillating section are integrated into a single piece by an anisotropic carbon fiber composite material 11, piezoelectric ceramics 2a and 2b are adhered to the upper and the lower surfaces of the composite material 11 and one end each of these elements is fixed by a fixture 3. Sine wave voltage with resonance frequency of a bimorph element is applied from an AC voltage supply 5 to the composite material 11. When this device is constructed such that the lower piezoelectric ceramics 2b may contract when the upper piezoelectric ceramics 2a expands, the antisotropic carbon fiber composite material 11 flexes in an oscillating manner with its end oscillating like a fan. Thereby a piezoelectric bimorph fan with high air blowing efficiency and no oscillation propagation loss is obtained. Moreover, the anisotropic carbon fiber composite material 11 causes no noise problem due to its light weight. |
