| 摘要 |
<p>PURPOSE:To rapidly raise the temp. of a shape memory alloy coil without bringing the coil to high temp. and to prevent the dew condensation in a case by supporting the heat conductive rod, having a coil-shaped shape memory alloy wound therearound and engaged with an opening and closing door at both end parts thereof by the heat conductive body connected to a heating mechanism so as to make the same freely slidable to the axial direction thereof. CONSTITUTION:One end part of a heat conductive plate 19 is fixed to the heating body 18 for heating a shape memory alloy coil 12 and a heat conductive rod 20 made of a metal for opening and closing a shutter is arranged to the other end part of the heat conductive plate 19. The rod 20 is supported so as to be freely slidable to its axial direction and the coil 12 is wound around the rod 20. By this method, the heating temp. of the heating body 18 is made lower than that of a heating body 9 for heating a desiccant to make it possible to lower the max. temp. of the coil 12 and, since the heat of the heating body 18 is directly transmitted to the coil 12, the coil 12 can be rapidly heated to its operating temp. The temp. in a case 1 is raised by the heating body 18 and the dew condensation of steam on the inner wall of the case 1 is prevented.</p> |
