| 摘要 |
PURPOSE:To provide a device for adjusting an air flow speed of an air curtain with a heater, capable of obtaining an optimum breaking air flow speed even any temperature of discharged air by providing a plurality of dampers at the discharge part in a rotatable manner, and providing a coil shaped shape memory alloy which contracts by heat between the dampers. CONSTITUTION:When a blower 2 is rotated, air is sucked up through a suction port 3, and is dischanged as a curtain flow from a discharge port 4. In a case where a hot air flow is required in winter and the like, then, power is supplied to heater tubes 5, air is warmed during the passage between the tubes 5, and a curtain flow of hot air is discharged through a discharge port 4 while heating the coil-shaped shape memory alloy 7. Since it is stored in the shape memory alloy 7 that the dampers 6 contracts to rotate around damper fulcrums 8 so that the shape memory alloy 7 obtains an opening area in which the optimum breaking air flow speed can be obtained in accordance with the temperature of the passing warm air flow, the optimum breaking air flow speed can be obtained automatically.
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