| 摘要 |
PURPOSE:To enable to detect the completion of preheating, slip, abnormal heating and the like of a catalytic combustion layer by measuring the temperature change of the catalytic combustion layer and consequently improve the safety and reliability of the equipment by a structure wherein a temperature detecting element is provided on the outer wall of a combustion tube at the location, to which the catalytic combustion layer is fixed. CONSTITUTION:In the titled equipment, liquid fuel supplied from a feed oil 29 and combustion air charged by means of a fan 8 are pre-mixed in an evaporation premixing chamber 16 and then sent through a resistance plate 15 and a straightening element 18 into a space 21 to be ignited and burnt there. Consequently, the catalytic combustion layer 20 is preheated with a small flame produced within the space 21. In this case, when the temperature of said layer 20 reaches the predetermined temperature, a controlling circuit (not shown) is assumed to be changed-over by means of the temperature detecting element 25 provided on the outer wall of the combustion tube 13. Concretely, air is increased to the flow amount, at which the oxidation reaction in the combustion layer 20 is allowed, by controlling a damper and, after the increase of the air, controlled so as to be increased to the steady flow amount with a suitable time lag after the extinction of lifted flame. |
