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

Claim 12:
13. The outdoor unit for an air-conditioning apparatus of claim 12,
wherein the bell mouth extends in the axial direction of the rotation axis and includes an inlet portion, a straight portion, and an outlet portion that are arranged from an upstream region toward a downstream region of airflow, the airflow being generated in a first direction by the axial-flow fan and traveling from an inside of the housing to an outside of the housing through an opening of the bell mouth,
wherein the inlet portion has an opening diameter that is greater at the upstream region of the airflow than at the downstream region of the airflow in the first direction,
wherein the straight portion is shaped as a straight pipe whose opening diameter is constant in the first direction,
wherein the outlet portion has an opening diameter that is greater at the downstream region of the airflow than at the upstream region of the airflow in the first direction, and
wherein a part of the trailing edge where the downward convex portion is formed is located at such a position in the axial direction of the rotation axis as to be covered by the straight portion.