| 摘要 |
PURPOSE:To contrive to suppress the temperature rise at the outer periphery of a burner, the disturbance in combustion air and the development of combustion noise by forming a structure wherein a vaporization chamber is made of a double wall structure so as to discharge the combustion air, which is sent from a blower, into the vaporization chamber through a discharge port arranged in the inner wall of the vaporization chamber and at the same time to imbed a heater in the inner wall. CONSTITUTION:The kerosene, which is jetted in a vaporization chamber 24 from a nozzle 29 by means of a pump 28, collides against the inside surface of the inner wall 25, which is heated with an electric heater 23, of the vaporization chamber 24 so as to be vaporized. Because the combustion air, which is flowed by means of a blower 26 through a vent passage 31 from a discharge port 33 in the direction along the inside surface of the inner wall 25, forms swirling flow, the speed of flow can be lowered and consequently the disturbance in air flow is suppressed and at the same time the combustion air and vaporized gas are effectively mixed with each other in the vaporization chamber 24 so as to flow through a pressure balance tube 32 into a burner head chamber 22 in order to burn at flame ports 21. In addition, because the combustion air cools an outer tube 25' while passing through the vent passage 31, the temperature rise of the outer tube 25' is suppressed and simultaneously the combustion air turns into the heated air and consequently the vaporization and mixing in the vaporization chamber 24 can be accelerated further.
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