| 摘要 |
A space heater (1) comprises a main housing (2) within which a gas dispersing housing (25) is mounted. A support member (44) of porous refractory material supports a catalytic heating element (26) in the dispersing housing (25) for converting gas to heat. The catalytic heating element (26) comprises a main catalyst element (60) with a high ignition and operating temperature and a plurality of secondary catalyst elements (61) with a low ignition temperature. A resistance wire heating element (65) ignites the secondary catalyst elements (61) whose operating temperature is greater than the ignition temperature of the main catalyst element (60) and in turn the secondary catalyst elements (61) ignite the main catalyst element (60). <IMAGE> |
