| 摘要 |
PURPOSE:To remove odor or harmful gas in atmosphere where a heater device is placed, enable a small amount of fuel to be easily burned in a stable manner and shorten a pre-heating time by a method wherein an inner surface of a pipe member having an electrical resistor stored therein is formed with a catalyst covering layer and then combustion gas consisting of fuel and combustion air is fed into the pipe. CONSTITUTION:When current is applied to an electrical resistor 3, heat rays are radiated from the electrical resistor 3 outward in entire circumferential directions. Since a catalyst covering layer 1 is provided to cover an inner surface of a pipe 2 having the electrical resistor 3 stored therein, the heat radiated from the electrical resistor 3 is directly radiated to the catalyst covering layer 1. Radiation heating of the catalyst covering layer 1 having a low heat capacity and conduction heating are carried out. The catalyst covering layer 1 is heated up to its active temperature within a short period of time to be at a high temperature. In turn, the electrical resistor 3 also heats odor substance in the air sent by a fan 4 into the pipe 2. Then, this odor substance is brought into contact with or diffused in the catalyst covering layer 1 heated up to its active temperature and then oxidization of odor and purification of the gas is rapidly carried out under its catalyst action. |
