JPS5698595A - Motor-driven blower - Google Patents

Abstract

PURPOSE: To reduce a liquid loss and noises by a method wherein high speed whirling air currents discharged from a moving vane outlet are led to a wind passage directed in a radial direction in which a guide vane is not provided, to a wind passage parallel to a vane shaft and to a wind passage directed inward in a radial direction in which the guide vane is provided.

CONSTITUTION: The air 2 which is sucked from the outside into a runner chamber 1 of the blower unit is made the high speed whirling air current by rotations of the moving vane 3 and discharged from the outlets 3a of the moving vane 3 into the wind passage 8 directed outward radially. The wind passage 11 arranged in almost parallel to the shaft of the above-mentioned moving vane 3 is formed at a downstream end of the wind passage 8 and the air discharged into said wind passage 8 is led in the wind passage 11. In addition, the said wind passage 11 is communicated with a return wind passage 6 directed inward radially, the return wind passage 6 is formed between a wind passage forming plate 10 and a wind passage cover 12, and the guide vane 4 is provided in the wind passage. The return wind passage 6 is communicated with a motor chamber 7 through an opening formed in a case 13 of the motor.

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