| 摘要 |
PURPOSE:To improve a safety characteristic of an air feeding or air discharging cylinder of a forced air feeding or discharging type combustion equipment for use in a hot water feeder and the like by a method wherein an air feeding cylinder is coaxially arranged at an outer circumference of the air discharging cylinder, a temperature sensing element is arranged at an inner surface of the air discharging cylinder and it is connected to a control unit by a lead line which is fused at a predetermined temperature. CONSTITUTION:An air feeding cylinder 13 with its both ends being closed is arranged coaxially at an outer circumference of an air discharging cylinder 12, a temperature sensing element 17 is set at an inner surface of an air discharging cylinder 12 near an air outlet port 13b of the air feeding cylinder 13. It is connected to a controller (not shown) of a combustion equipment by a lead line fused at a predetermined temperature. With this arrangement, in case that a temperature of discharged gas detected by the temperature sensing element 17 is lower than a temperature indicated under a normal combustion state, it is judged that the air discharging pipe is displaced and then the operation is terminated. When abnormally temperature ridges, the lead line 13 is fused. In this way, the control device may judge it as an abnormal state and terminate the operation. In this way, it is possible to improve a safety characteristic. |
