CATALYTIC COMBUSTION HEATER

摘要

PROBLEM TO BE SOLVED: To obtain a catalytic combustion heater having a short starting time with safety for early activating an overall catalyst heat exchanger while preventing exhaust and ignition of unburned gas with a simple constitution. SOLUTION: A tube 2 having a fluid-to-be-heated channel therein is arranged in a fuel gas channel 11 containing combustible gas and combustion supporting gas, many fins 21 are provided on an outer periphery of the tube 2 to form an oxidizing catalyst layer on the surface. A temperature detector 7 for detecting a temperature of combustion exhaust gas is provided in an exhaust port 13 of the channel 11, and a flow controller 6 for controlling flow of the combustible gas at the time of starting based on the detected result is provided. The controller 6 controls to reduce a combustible gas flow until the exhaust gas temperature exceeds a predetermined temperature and judges the activation at part of the catalyst when exceeding the predetermined temperature to increase the combustible gas flow to a specified amount, thereby shortening a starting time while preventing ignition.