| 摘要 |
PROBLEM TO BE SOLVED: To prevent malfunction and deterioration of an electric equipment due to heat by suppressing temperature rise in a control box, and to provide the equipment at a low price. SOLUTION: A twin fan 1 is equipped with a partition plate 2, a driving fan 3, and a driven fan 4. The partition plate 2 comprises a non-magnetic non- conductive body. The driving fan 3 is mounted on one side of the partition plate 2 to be driven by rotation by fluid. The driven fan 4 is mounted on the other side of the partition plate 2. The driving fan 3 is provided with a driving side rotor 8 which has a driving side permanent magnet portion located near the partition plate 2. The driven fan 4 is provided with a driven side rotor 13 which is located near the partition plate 2. When the driven fan 3 rotates, the driven fan 4 rotates following rotation of the driving fan 3 by the driven side rotor 13 receiving a force acting on magnetic pull from driving side the permanent magnetic portion and/or eddy current. |
