| 摘要 |
PURPOSE:To improve the blasting performance of the titled device with a simple construction by bringing a coil spring made of a shape memory alloy into engagement with one end of an air flow direction changing vane axially supported at the center by a shaft and also bringing an opposing bias spring into engagement with another end of the vane. CONSTITUTION:The coil spring 13 made of the shape memory alloy is engaged with one end of the air flow direction changing vane 15 axially supported at its center by the shaft 16, and the opposing bias spring 17 is engaged with another end of the vane 15. As a result, since in the cooling mode operation, the blow-off temperature is low, the air flow direction vane 15 becomes horizontal because of the deformation property of the coil spring 13 made of the shape memory alloy and the load of the opposing bias load. Furthermore, since the air flow direction changing vane 15 faces downwardly for the above described similar reason at the time of heating mode operation, it is mode possible to improve the blasting performance with a simple construction but without using temperature decting means and a mechanism for changing the blasting direction.
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