| 摘要 |
PROBLEM TO BE SOLVED: To provide a LPG heating device for a vaporizer in which the occurrence of the contact failure of an electrode plate caused by the intrusion of a LPG gas into a heater unit can be avoided. SOLUTION: In the LPG heating device 1A with a built-in heater unit 10, 10 formed by inserting a PTC cell 11 between two electrode plates 12, 13 and sealing the outer peripheral side by a sealing member 17, a communication hole 13b making the inside of the heater unit 10 communicate with the outside is formed at at least one electrode plate 13 of the heater unit 10 and a check valve 15 to allow only a flow from the inside to the outside in the communication hole 13b is arranged. When inner pressure is equal to or higher than a prescribed level and higher than outer pressure by the intrusion of the LPG gas into the heater unit 10, a difference of the inner pressure from the outer pressure is reduced by opening the check valve 15 while preventing the intrusion of the liquid LPG into the heater unit 10. COPYRIGHT: (C)2012,JPO&INPIT |
