| 摘要 |
PURPOSE:To reduce the thickness of a burner and a heat exchanger and to prevent overheating of the combustion chamber of the burner, by a method wherein the inner cylinder being the combustion chamber is disposed in the outer cylinder being an air passage, an opening, which intercommunicates the interior of the inner cylinder and the exterior of the outer cylinder, is formed in one side part, and a burner, which is capable of performing blue flame combustion, is mounted to the end of the cylinder. CONSTITUTION:When operation is started, the air from a blower 1 flows along an inner cylinder 13, the air flows in the inner cylinder 14 at the outer end thereof, and flows in a combustion chamber 12 through air ports 17a. Meanwhile, kerosene, sprayed through a nozzle 15, is mixed with the air through the air ports 17a, and the fuel-air mixture is ignited by means of an ignition plug 16 to start yellow flame combustion, which is immediately changed into blue combustion to continue it. The flame extends in the direction of the axis of the inner cylinder 13, and is gradually branched to a combustion chamber 3 through opening 18. Combustion is completed at least in the combustion chamber 3, the mixture flows in a heat exchanger 4 and out through an exhaust gas port 7. The flame around the inner cylinder 13 and the openings 18 is heated to a high temperature suitable for blue combustion, but since the air for combustion flows therearound, such portion is prevented against overheating. |
