Axial fan with grating duct

By installing side-blowing and direct-blowing grilles on the axial fan casing, leakage flow at the blade tip is suppressed, and airflow organization is improved. This solves the problems of insufficient air volume, high flow loss, and aerodynamic efficiency mismatch of existing axial fans in low-pressure, high-flow scenarios, and achieves more efficient airflow delivery and energy-saving effects.

CN122106944APending Publication Date: 2026-05-29GUANGDONG ZHAOQING DETON
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG ZHAOQING DETON
Filing Date
2026-04-08
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing axial fans suffer from problems such as insufficient output volume, poor airflow organization, high flow loss, and mismatch between aerodynamic efficiency and operating conditions in low-pressure, high-flow-rate applications with high airflow quality requirements.

Method used

Design an axial flow fan with a grille casing, including an impeller and an outer casing. The casing is equipped with a side-blowing grille and a direct-blowing grille. The side-blowing grille starts in the upstream region of the blades and turns into a direct-blowing grille. The side-blowing and direct-blowing grilles introduce inclined and radial airflow, suppress blade tip leakage flow, and improve airflow organization.

Benefits of technology

It effectively suppresses flow leakage at the blade tip, reduces flow loss, increases air volume and blowing distance, improves operating efficiency, reduces power consumption, improves airflow organization, expands the range of high-efficiency operating conditions, and reduces noise.

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Abstract

The present application relates to the technical field of axial flow fan, and particularly relates to an axial flow fan with a grating air duct. The axial flow fan with the grating air duct comprises an impeller and an air duct arranged outside the impeller, the impeller is provided with blades, the blades have blade tips, blade leading edges and blade trailing edges, the blade leading edges and the blade trailing edges are sequentially arranged along the air inlet direction of the air duct, the middle part of the blade tip towards the side of the blade leading edge is an upstream blade area, and the middle part of the blade tip towards the side of the blade trailing edge is a downstream blade area. The axial flow fan with the grating air duct can inhibit blade tip leakage flow, effectively improve air flow organization, effectively increase air volume and blowing distance, improve the operation efficiency of the axial flow fan, and solve the technical problems that the existing axial flow fan cannot meet the air volume demand, air flow organization is poor, flow loss is high, and aerodynamic efficiency and working conditions are not matched.
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