| 摘要 |
PURPOSE:To make it possible to release for sure a latent heat accumulating material of supercooling without accompanying deterioration heat accumulating material by providing a drive device to make a source material holding member which holds the source material of a latent heat accumulating material to be brought in temporally contact with the heat accumulating material in a heat accumulating tank. CONSTITUTION:When the instruction to move the state of supercooling is given to a control circuit 18, a switch is turned ON by the control of the control circuit 18 and a spring 12 made of a shape memory alloy 18 energized and generates heat, and when its temperature reaches a temperature above the point of it transfermation, the spring starts to shrink due to the shape memory effect. With this shrinking, a source material holding member 8 is lowered and its tip end section makes a contact with the surface of a latent heat accumulating material 4 in a heat accumulating tank 1. The heat accumulating material is at once released from the state of super-cooling by the contact with the source material 9 and starts to solidify, releasing the latent heat. When the rise in the temperature of the heat accumulating material 4 is detected by a temperature sensor 17, the contact of the source material holding member 18 and the heat accumulating material 4 is detected by the control circuit 18. Next, the control circuit 18 turns the switch 15 OFF and stops the electric current to the shape memory alloy spring 12. When the effect of shape memory is gone, the source material holding member 8 is lifted by the restoring force of a material holding member 8 is lifted by the restoring force of a bias spring 13 and placed away from the heat accumulating material. |
