Mitsubishi Heavy Industries Limited

Asuka Soya

Atsushi Suzuki

Tsuyoshi Eguchi

Tetsuo Tominaga

Kazuyuki Kamiya

A shroud includes a body portionB, a mountpositioned at a center of the body portionB and supporting rotary vane wheel driver, and multiple support beamsradially extending from the mountand joining the mountand the body portionB, where each of the support beamsbecomes thicker from an upstream side of a flow direction of air toward a downstream side thereof, and an edge portionof each of the support beamson the downstream side of the flow direction of the air discharged by the rotary vane wheelis oriented in a direction parallel to a rotation axis of the rotary vane wheel, and the edge portion on the upstream side is oriented in a direction opposite to a rotation direction of the rotary vane wheel

Shroud and rotary vane wheel of propeller fan and propeller fan

A shroud includes a body portionB, a mountpositioned at a center of the body portionB and supporting rotary vane wheel driver, and multiple support beamsradially extending from the mountand joining the mountand the body portionB, where each of the support beamsbecomes thicker from an upstream side of a flow direction of air toward a downstream side thereof, and an edge portionti of each of the support beamson the downstream side of the flow direction of the air discharged by the rotary vane wheelis oriented in a direction parallel to a rotation axis of the rotary vane wheel, and the edge portion on the upstream side is oriented in a direction opposite to a rotation direction of the rotary vane wheel

There is provided a propeller fan in which a clearance between a rotary vane wheel and a shroud is constant three-dimensionally to improve air blowing efficiency and suppress noise. Furthermore, there is provided a propeller fan in which a span length of the rotary vane wheel with respect to the shroud is varied between a front edge portion and a rear edge portion to improve air blowing efficiency and suppress noise. Still further, there is provided a propeller fan characterized in that chamfering is applied only to a negative pressure face of a circumferential outer edge portion of a vane.

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Aichi, Japan

Asuka Soya