| 摘要 |
<p>PURPOSE:To suppress the change with time in the surface temperature on the upstream side of a catalyst layer and provide a burner employing catalyst which is capable of maintaining a stable room heating and heating efficiency for a long time by providing a catalyst layer which forms the surface of a mixture gas channel with a catalyst metal powder carrying layer. CONSTITUTION:A catalyst layer 7 is a honeycomb-shaped substrate and has communicating holes 7a, and its surface is covered by a catalyst metal carrying layer 7b, and the catalyst metal carrying layer 7b is covered by a catalyst metal powder carrying layer 7c. With this arrangement the catalyst combustion reaction is carried out with a premixture of the fuel and air which performs gas diffusion through the catalyst metal powder carrying layer 7c, passes through it, and reaches the catalyst metal carrying layer 7b. The violent reaction heat and poisoning are eased by the catalyst metal powder carrying layer 7c. It is, therefore, possible to protect the catalyst metal from violent reaction heat, steam or poisoning.</p> |
