Centrifugal multiblade fan
AssigneeDenso Corporation
InventorsToshinori Ochiai, Masaharu Sakai, Hideki Seki
Life of this patent
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Abstract
A centrifugal multiblade fan according to the present invention sucks air from one end side of an axial direction of a rotation axis to a radial inside, and blows the air to a radial outside. The centrifugal multiblade fan includes a plurality of blades located around the rotation axis. Each blade has a leading edge positioned at the radial inside, and a trailing edge positioned at a radial outside. The leading edge of each blade has an edge shape with a radius of curvature of 0.2 mm or less, for example.
Claims20
A centrifugal multiblade fan that sucks air from one end side of an axial direction of a rotation axis to a radial inside of the centrifugal multiblade fan, and blows the air to a radial outside of the centrifugal multiblade fan, the centrifugal multiblade fan comprising
- a plurality of blades located around the rotation axis,
- wherein each blade has a leading edge positioned at the radial inside, and a trailing edge positioned at the radial outside,
- wherein each blade has a ventral surface on a forward side in a rotation direction, and a back surface opposite to the ventral surface,
- wherein the leading edge has a first angle part on a side of the ventral surface, and a second angle part on a side of the back surface,
- wherein at least the second angle part has an edge shape with a radius of curvature R of 0.2 mm or less, and
- wherein a blade thickness of each blade increases gradually from both the leading edge and the trailing edge to a thickness portion in a chordwise direction.
A centrifugal multiblade fan that sucks air from one end side of an axial direction of a rotation axis to a radial inside of the centrifugal multiblade fan, and blows the air to a radial outside of the centrifugal multiblade fan, the centrifugal multiblade fan comprising
- a plurality of blades located around the rotation axis, wherein
- each blade has a leading edge positioned at the radial inside, and a trailing edge positioned at the radial outside,
- each blade has a ventral surface on a forward side in a rotation direction, and a back surface opposite to the ventral surface,
- the leading edge has a first angle part on a side of the ventral surface, and a second angle part on a side of the back surface,
- at least the second angle part has an edge shape,
- a blade thickness of each blade increases gradually from both the leading edge and the trailing edge to a thickness portion in a chordwise direction,
- the first angle part is located at a first distance from a rotation center of the plurality of blades,
- the second angle part is located at a second distance from the rotation center, and
- the first distance is equal to the second distance.
A centrifugal multiblade fan that sucks air from one end side of an axial direction of a rotation axis to a radial inside of the centrifugal multiblade fan, and blows the air to a radial outside of the centrifugal multiblade fan, the centrifugal multiblade fan comprising
- a plurality of blades located around the rotation axis,
- wherein each blade has a leading edge positioned at the radial inside, and a trailing edge positioned at the radial outside,
- wherein each blade has a ventral surface on a forward side in a rotation direction, and a back surface opposite to the ventral surface,
- wherein the leading edge has a first angle part on a side of the ventral surface, and a second angle part on a side of the back surface,
- wherein at least the second angle part has an edge shape such that air from the one end side of the axial direction of the rotation axis is always separated at the second angle part, and
- wherein a blade thickness of each blade increases gradually from both the leading edge and the trailing edge to a thickness portion in a chordwise direction.
Dependencies are inferred from the claim text.