| 摘要 |
A kerosene heater (1) having a pump assembly (106) which includes a piston (113) having a hollow bore (121) through which fuel (98) is routed to the hollow shaft of a fuel atomizer (27). The piston (113) is operated by a cam (117) machined into the shaft (114) of the heater motor (22). Mounted on the motor shaft (114) between the atomizer (27) and the pump assembly (106) is a novel fan (26) combining both low pitched outer blade portions (143) and high pitched vanes (146) near the hub (136) of the fan (26). The air flow near the periphery of the fan tends to be axial while the flow near the hub (136) tends to be turbulent and of lower velocity. A series of rear heads (32,33) downstream of the atomizer (27) tends to separate cooling and combustion air while preheating a portion of the air in the region of the atomizer (27). Some of the air impinges a serrated disc (47) located downstream of the atomizer (27), the disc having a novel edge structure (49) which tends to create turbulence and aid atomization of the fuel prior to ignition. A pair of tapering, nesting perforated cones (65,81) located downstream of the ignitor (17) modify the fuel/air mixture and control the size and shape of the flame as it moves toward the open end (179) of the heater jacket (10). A novel control circuit (162) measures the resistance of the ignitor (17) to obtain an indication of the temperature within the combustion chamber and generate motor control signals in response thereto.
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