| 摘要 |
1482487 Liquid fuel combustion apparatus MITSUBISHI DENKI KK 11 March 1975 [11 March 1974 (4)] 10185/75 Headings F4T and F4B A vapourizing liquid fuel combustion apparatus comprises a vapourizing chamber 5, a combustion chamber 6, an electric pump 40 for feeding the fuel from a tank 39 to chamber 5, a blower 15-17 for feeding combustion air mixed with vapourized fuel to chamber 6, and a control device for intermittently driving the pump so as to control the fuel feed rate. The apparatus is incorporated in an air space heating apparatus which comprises an air inlet and outlet 3 and 2, a combustion air inlet 10, and exhaust gas outlet 9, a multi-pipe heat exchanger 7, a combustion air preheater 11-13, and by-pass 28. In operation, motor 17 is driven to rotate blades 15, 16, whereby combustion air is passed from inlet 10 through preheater 11 to vapourizing chamber 5, into combustion chamber 6 and thence through heat exchanger 7 to exhaust outlet 9. A portion of the air is diverted from inlet 10 through by-pass 28 directly into heat exchanger 7. A pressure switch 34 is actuated by the air so that heater 13, vaporizing heater 32, and a temperature detector 33 are turned on, and the combustion air is heated. When the wall of chamber 5 reaches a predetermined temperature the resistance of detector 33 increases, so that a switch is actuated to supply voltage to pump 40 and to control and timer devices (63), (64), Fig. 5 (not shown). Kerosene is passed from pump 40 through a line 42 on to a plate 14 where it is vaporized by heater 32; the fuel is mixed with the preheated air, and this mixture is injected through holes in a partition 19 into combustion chamber 6, where it is ignited by an arc generated between an electrode 20 and partition 19, to form flames 68. A delay switch (54), Fig. 5 (not shown), is actuated to start blower 35 and the room air is drawn in at 3, passes around heat-exchanger 7 where it is heated, and is then blown-out through outlet 2. An electromagnetic coil 30 is energized to close a switch 29 thus preventing combustion air passing through by-pass 28. The feed rate of pump 40 is controlled to prevent back-fire or flame lifting. When the room air temperature reaches a predetermined value detector switch 36 is operated to de-energize coil 30, valve 29 opens, and part of the combustion air by-passes chamber 5. |
