Patent ID: 11873833
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 6:
7. The axial-flow fan of claim 6,
wherein, in the section of the vane that is along the axial direction of the rotation axis and along the circumferential direction of the axial-flow fan,
in a case in which an angle formed between a virtual line intersecting the leading edge and being parallel to the rotation axis and a virtual line representing a direction in which the leading edge faces is defined as an inlet angle of the vane, and
a second diagram is set in which a horizontal axis represents a distance on the leading edge in the radial direction of the axial-flow fan from the inner circumferential edge to the outer circumferential edge while a vertical axis represents a size of the inlet angle, and
a relationship between the size of the inlet angle and the distance on the leading edge in the radial direction from the inner circumferential edge is represented as a second line chart,
the vane is shaped such that a size of the inlet angle formed at a point in the second line chart that is at a distance equal to a radial distance of the minimal possible point of the outlet angle represented in the first line chart is smaller than a size of the inlet angle formed at a point of the leading edge that is at the outer circumferential edge.