| 摘要 |
PURPOSE:To achieve a proportional combustion wherein the flow rate of gas may be controllable in a wide range, and at the same time an abrupt change in load may be promptly followed up with an improved response, by constituting an automatic gas supplying adjuster for a burner with a vent valve and a gas pump. CONSTITUTION:As a tapping temperature rises close to a preset level, which is detected by a temperature detecting element 29, a controlling device 32 is adapted to adjust the input of signal to the magnet coil 40 of vent valve 44 in response to a difference between a preset and a detected temperatures, while retaining a gas pump 22 in its steady speed operating condition. There takes place a gradual increase in the electric current of magnet coil 40, forces acting in the direction of opening a vent valve 41 and consequently the amount of gas venting from an outlet side passage 37 to an inlet side passage 38. As a result, the internal gas pressure of outlet side passage 37 and tank gradually lowers and the supplying quantity of gas to a burner 25 also shows a gradual decrease. |
