Fan, axial flow blade and vane for axial flow blade

Abstract

The invention discloses a fan, an axial flow blade and a vane for the axial flow blade. According to the vane for the axial flow blade disclosed by the invention, the two sides of the vane are arranged in the rotation direction of the vane and are defined as a first side and a second side respectively; the two ends of the vane are a free end and a connecting end for being connected with a hub of the axial flow blade respectively; an aerofoil guide vane is fixed to the suction surface of the vane and extends from the first side to the second side along an arc line; the end part, arranged on the first side, of the aerofoil guide vane is the first end; the end part, arranged on the second side, of the aerofoil guide vane is the second end; the extension direction, from the first end to the second end, of the aerofoil guide vane is the same as the rotation direction of the vane; and the distance from the second end to the free end is larger than that from the first end to the free end. With the structural design, the vane for the axial flow blade can effectively reduce noise produced during rotation of the axial flow blade and increase the air supply volume of the fan.

Description

technical field [0001] The invention relates to the technical field of refrigeration appliances, and more specifically, to a fan, an axial-flow fan blade and blades thereof. Background technique [0002] The axial blades of the fan include a hub and a plurality of blades arranged on the hub, and the blades are evenly arranged along the circumference of the hub. One side of the blade is the pressure surface, and the other side is the suction surface. The hub rotates under the drive of the motor, and then drives the blade to rotate. The airflow flows along the pressure side of the blade and sends the wind forward. On the suction side of the blades, the pressure of the gas is low, some of the gas will flow downwards, and at the same time there will be a congested airflow between the two blades, so that the airflow cannot flow along the streamline smoothly and the noise is louder. Moreover, the gas cannot be fully utilized, which affects the air volume of the fan. In addition...

AI Technical Summary

Problems solved by technology

On the suction side of the blades, the pressure of the gas is low, some of the gas will flow downwards, and at the same time there will be a congested airflow between the two blades, so that the airflow cannot flow along the streamline smoothly and the noise is louder. Moreover, the gas cannot be fully utilized, which affects the air volume of the fan

In addition, when the blade is rotating, because the airflow periodically blows the blade, at the top of the blade tip, the airflow will generate a vortex here, which will generate a certain amount of rotating noise

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