Axial fan
AssigneeSanyo Denki Co., Ltd.
InventorsYoshihisa Yamazaki, Satoshi Tateyama
Life of this patent
Estimating the term…
Abstract
An axial fan includes: an impeller cup including a blade extending in a radial direction; a motor configured to rotate the impeller cup; and a housing accommodating the impeller cup and the motor. The housing includes: a casing portion covering an outer periphery of the impeller cup; a base portion supporting the motor; and a spoke portion connecting the base portion and the casing portion. The casing portion includes an inlet surface where air is drawn in, and an outlet surface where air is discharged. The casing portion is provided with a level difference portion at least partially in an inner peripheral surface of the casing portion on the outlet surface side.
Claims13
An axial fan comprising:
- an impeller cup including a blade extending in a radial direction;
- a motor configured to rotate the impeller cup;
- and
- a housing accommodating the impeller cup and the motor, wherein the housing includes:
- a casing portion covering an outer periphery of the impeller cup;
- a base portion supporting the motor;
- and
- a spoke portion connecting the base portion and the casing portion,
- the casing portion includes an inlet surface where air is drawn in, an outlet surface where the air is discharged, and an airway which is an internal opening of the casing portion,
- the casing portion is provided with a level difference portion only partially in an inner peripheral surface of the casing portion on a side of the outlet surface,
- the level difference portion is a recess having a shape recessed from the outlet surface toward the inlet surface along the airway,
- the casing portion is provided with a lightening portion at least partially in the outlet surface, the lightening portion having a rectangular shape in a plan view perpendicular to the outlet surface,
- the level difference portion is provided between the lightening portion and the airway,
- the lightening portion is communicated with the airway via the level difference portion, and
- the lightening portion has a first width in the radial direction and a second width in a circumferential direction of the axial fan, the second width is smaller than the first width.
An axial fan comprising:
- an impeller cup including a blade extending in a radial direction;
- a motor configured to rotate the impeller cup;
- and
- a housing accommodating the impeller cup and the motor, wherein the housing includes:
- a casing portion covering an outer periphery of the impeller cup;
- a base portion supporting the motor;
- and
- a spoke portion connecting the base portion and the casing portion,
- the casing portion includes an inlet surface where air is drawn in, and an outlet surface where the air is discharged,
- a rectangular lightening portion is open partially in the outlet surface of the casing portion,
- the rectangular lightening portion has a rectangular shape in a plan view perpendicular to the outlet surface,
- the rectangular lightening portion has a first width in the radial direction and a second width in a circumferential direction of the axial fan, the second width is smaller than the first width,
- a position on the outlet surface of the casing portion where a radially outer end of the spoke portion is connected is set in such a manner as to be different from a position on the casing portion where the lightening portion is formed,
- wherein the casing portion is provided with a level difference portion at least partially in an inner peripheral surface of the casing portion on a side of the outlet surface,
- the level difference portion is provided between the lightening portion and an airway of the axial fan, and
- the lightening portion is communicated with the airway, via the level difference portion.
Dependencies are inferred from the claim text.