| 摘要 |
<p>1,260,596. Water heater; burners. PATTERSON-KELLEY CO. Inc. 26 June, 1970, No. 31087/70. Headings F4A and F4T. In a hot water heater contained within a hot water storage tank 11 the hot gases from the combustion chamber 47 flow along duct 15 around primary finned heat exchange tubes 87. A heat transfer fluid is pumped in parallel through the primary heat exchange tubes 87 and through the secondary heat exchange tubes 19 immersed in the water to be heated in tank 11. The burner air entering through duct 113 is swirled in duct 51 by fan 65 and is forced down the burner nozzle 49 as indicated by the arrows. Fuel gas fed from pipe 69 via annular chamber 67 is injected through holes 71 immediately downstream of radial baffles 75 extending axially along their support rod 79 to create turbulence in the air flow and ensure efficient mixing with the fuel gas. The flared throat 81 leading the burning gases to the combustion chamber is shaped to cause sufficient whirling action in the corners 83 to maintain combustion in those regions. The burner is fitted with an ignition device 103 and the normal temperature sensors and safety devices.</p> |
