| 摘要 |
PURPOSE:To enhance efficiency of conducting heat which is transmitted to the exterior from a PTC ceramics through aluminum plates by increasing a contact area of the aluminum plate and the PTC ceramics without forming recess portions in the aluminum plates. CONSTITUTION:An electrode 2a is formed on one surface of an aluminum plate 2 as a heat conducting plate. Two of the aluminum plates 2, 2 are disposed in such a manner as to sandwich the surfaces of the electrode 2a between both surfaces of a PTC ceramics 1 in close contact. An electric power is supplied to the PTC ceramics 1 through the portions 2b of the electrodes of the aluminum plates 2 in separation from the PTC ceramics 1. |
