Axial flow fan motor

Patent metadata

Field	Value
Publication number	US-9664196-B2
Application number	US-201414454527-A
Country	US
Kind code	B2
Filing date	Aug 7, 2014
Priority date	Aug 29, 2013
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

An axial flow fan motor 100 comprises: a casing outer frame 61 ; an impeller 10 ; a rotor shaft 20 as a rotation axis at a center of the impeller 10 ; a bearing housing 30 in an inside of a rotor housing 11 ; and a base portion hub 62 in an air blowout opening side 2 , wherein, in a cross-sectional view along the rotation axis, the base portion hub 62 has an outer peripheral portion 65 at least partially inclined to the rotation axis side by an angle θ1 toward the air blowout opening side 2 with regard to a straight line parallel to the rotation axis, and the casing outer frame 61 has an inner peripheral portion 67 at least partially inclined to the rotation axis side by an angle θ2 toward the air blowout opening side 2 with regard to a straight line parallel to the rotation axis.

First claim

The invention claimed is:

1. An axial flow fan motor, comprising:
a casing outer frame;
an impeller disposed to an air suction opening side of the casing outer frame, having a rotor housing and a vane disposed around an outer periphery thereof;
a rotor shaft disposed at a center of the impeller, functioning as a rotation axis thereof;
a bearing housing disposed to an inside of the rotor housing and an outer periphery of the rotor shaft, supporting rotatably the rotor shaft; and
a base portion hub disposed to an air blowout opening side of the casing outer frame, fixing the bearing housing,
wherein, in a cross-sectional view along the rotation axis, the base portion hub has an outer peripheral portion at least partially inclined to a rotation axis side by an angle θ1 toward the air blowout opening side with regard to a straight line parallel to the rotation axis, and the casing outer frame has an inner peripheral portion which is at least partially inclined toward the rotation axis at an angle θ2 with respect to a straight line parallel to the rotation axis as the inner peripheral portion approaches the air blowout opening side.

2. The axial flow fan motor according to claim 1 , wherein the angle θ1 is equal to or larger than the angle θ2.

3. The axial flow fan motor according to claim 1 , wherein each of the inner peripheral portion of the casing outer frame and the outer peripheral portion of the base portion hub is inclined to the rotation axis side from an inclination starting point to an end portion of the air blowout opening side.

4. The axial flow fan motor according to claim 1 , wherein the inner peripheral portion of the casing outer frame has an inclination starting point located farther than the outer peripheral portion of the base portion hub viewed from the air blowout opening side.

5. The axial flow fan motor according to claim 1 , wherein the rotor housing has a top portion inclined in the air suction opening side so that an air suction opening has a wider opening than a depth side in the rotation axis direction.

6. The axial flow fan motor according to claim 1 , wherein the axial flow fan motor is adapted to be in use in a medium air flow volume region of 0.5 to 1.0 m 3 /min.

7. The axial flow fan motor according to claim 1 , further comprising a stationary blade connecting the casing outer frame and the base portion hub.

8. The axial flow fan motor according to claim 1 , wherein the bearing housing is secured integrally to the base portion hub when injection molded using a resin.

Assignees

• Minebea Co Ltd

Inventors

• Higuchi Yukihiro
• Taroda Atsushi

Classifications

• F04D29/547

  having a special shape in order to influence fluid flow · CPC title

• F04D29/542

  Bladed diffusers (fixing blades to stators F01D9/042) · CPC title

• F04D25/0613 Primary

  the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator · CPC title