| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric heater of an LPG heating device having heater units in parallel and enabling a fuse to fulfill its function for coping with short circuit caused between electrode and radiator plates to avoid damage of the device. SOLUTION: The electric heater 30A has the plurality of heater units 31A comprising PTC heaters 320 interposed between the different electrode and radiator plates 314, 315 of different polarities from each other, are disposed in parallel at predetermined intervals and heat LPG passing through gaps formed as LPG flow passages 34 by the intervals. Fuse parts 300 having metal wires 305 serving as fuse members for melting upon occurrence of the short circuit to cut off electric current paths are respectively provided on all the plus electrode and radiator plates 314 of the heater units 31a and are connected so that electric current reaches current collection sections of the heater units through the fuse parts 300. COPYRIGHT: (C)2008,JPO&INPIT |
