Patent ID: 9145896
Filing Date: 2015-09-29
Classification: F04D

Abstract:
1. An axial flow fan comprising: a fan housing including an impeller disposed in the air channel and including a plurality of blades; a motor including: a motor casing for receiving the motor therein, including a bottom wall portion located within the first flange, and a peripheral wall portion formed continuous with the bottom wall portion and extending toward the second flange; a plurality of webs disposed at intervals in a direction of rotation of the impeller and located within the air channel to connect the motor casing and the first flange, wherein a groove portion is formed in one of the webs to allow an internal space of the motor casing to communicate with an outer space defined between the first flange and the second flange of the fan housing and located outside the cylindrical portion of the fan housing; a plurality of lead wires received in the groove portion formed in the one of the webs, connected to the power supply circuit of the motor, and extending toward the outer space defined between the first flange and the second flange of the fan housing and located outside the cylindrical portion of the fan housing; a first lead wire engaging portion formed in a connecting portion between the first flange and the one of the webs, the first lead wire engaging portion engaged with the plurality of lead wires such that the lead wires are pulled out from and extend through the first lead wire engaging portion into the outer space defined between the first flange and the second flange of the fan housing and located outside the cylindrical portion of the fan housing; a second lead wire engaging portion formed in the second flange and adapted to engage the plurality of lead wires when the plurality of lead wires engaged with the first lead wire engaging portion and pulled out therefrom into the outer space defined between the first flange and the second flange of the fan housing and located outside the cylindrical portion of the fan housing are then pulled out through the second lead wire engaging portion and the second flange; and a third lead wire engaging portion formed in the first flange at a given distance from the first lead wire engaging portion and adapted to engage the plurality of lead wires when the lead wires engaged with the first lead wire engaging portion and pulled out therefrom into the outer space defined between the first flange and the second flange of the fan housing and located outside the cylindrical portion of the fan housing are then pulled out through the third lead wire engaging portion and the first flange, wherein: the positional relationship of the first and second lead wire engaging portions is defined to allow the plurality of lead wires to pass through the outer space, being engaged with the first lead wire engaging portion, and then to be engaged directly with the second lead wire engaging portion; and the positional relationship of the first and third lead wire engaging portions is defined to allow the plurality of lead wires to pass through the outer space, being engaged with the first lead wire engaging portion, and then to be engaged directly with the third lead wire engaging portion.