| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive air duct of a combustion type heater having enough rigidity, suppressed in the rise of a surface temperature, a low lowering ratio of a warm air temperature, and low in air flow resistance, and matching with a surrounding color tone. SOLUTION: A region in the vicinity of a heater unit 1 is constituted of a hose 4 of a first elastic material having heat resistance, a high elasticity limit and a large elastic modulus. A region on an air blow-out port side is constituted of a hose 6 having lower heat resistance than that of the first elastic material, a low elasticity limit and a small elastic modulus. The first elastic material hose 4 and the second elastic material hose 6 are connected by a joint member 5 of a heat resistant material. COPYRIGHT: (C)2006,JPO&NCIPI
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