| 摘要 |
PURPOSE:To dissipate efficiently the heat generated in a voice coil by providing a heat pipe one end of which is connected thermally to a top of a cap directly and the other end of which is connected to a radiator through a center pole. CONSTITUTION:The cap 6 is made of a substance with high heat conductivity and the circumference is fitted to the center pole 3 so as to reach a magnetic gap 4. A magnetic fluid 5 having a high heat conductivity is filled in the gap and the voice coil 1 and the cap 6 are immersed in the magnetic fluid 5. One end of the heat pipe 2 is fixed to the center part of the radiator via a thermal joint 7a and the other end is fitted via a thermal joint 7b. Thus, the heat generated in the voice coil 1 moves to the cap 6 via the magnetic fluid 5 and then delivered to the heat pipe 2 and the radiator, from which the heat is dissipated externally into air. |
