Modular Fan Unit Housing Design for Noise Reduction
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Solution Overview
Problem
Modular fan units in industrial systems face challenges with noise emission, as existing noise-attenuation methods increase manufacturing complexity and outer dimensions, reducing packing density.
Innovation Solution
A modular fan unit design with a housing divided into two halves, featuring specific geometric ratios and a circumferential hollow chamber ring, minimizes noise emission without the need for additional insulation, allowing for compact and efficient arrangement in air-handling systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noise-attenuation materials such as fiberglass-reinforced plastic and foam are used to line the outside of the airflow duct, then noise emission is reduced, but manufacturing complexity increases and outer dimensions are increased
Solution Approach 1:
The invention extracts the noise attenuation function from separate insulation materials and integrates it into the housing structure itself. The housing wall thickness B is specifically designed to provide noise attenuation while maintaining structural integrity, eliminating the need for additional fiberglass-reinforced plastic or foam linings.
Solution Approach 2:
The invention merges the structural housing function with the noise attenuation function into a single integrated component. The housing serves both as the structural enclosure and as the noise-damping element through its optimized wall thickness B, combining previously separate functions into one unified structure.
2Object-affected harmful factors
If noise-attenuation materials such as fiberglass-reinforced plastic and foam are used to line the outside of the airflow duct, then noise emission is reduced, but outer dimensions are increased and packing density is diminished
Solution Approach 1:
The invention extracts the noise attenuation function from separate insulation materials and integrates it into the housing structure itself. The housing wall thickness B is specifically designed to provide noise attenuation while maintaining structural integrity, eliminating the need for additional fiberglass-reinforced plastic or foam linings.
Solution Approach 2:
The invention merges the structural housing function with the noise attenuation function into a single integrated component. The housing serves both as the structural enclosure and as the noise-damping element through its optimized wall thickness B, combining previously separate functions into one unified structure.
3Ease of manufacture
If the housing is divided into two detachable halves, then installation and manufacturing are simplified, but structural integrity may be compromised
Solution Approach 1:
The housing is divided into two detachable halves (first housing half and second housing half) that can be separately manufactured and then assembled. This segmentation allows for easier manufacturing, inspection, and maintenance while maintaining structural integrity through proper joining mechanisms.
Solution Approach 2:
The housing halves are pre-manufactured with joining features (such as flanges, ribs, or sealing elements) that ensure proper alignment and secure connection when assembled. This preliminary preparation of joining interfaces guarantees structural integrity while retaining the benefits of modular construction.
Data Source
AI summary
A modular fan unit of a diagonal and/or axial fan having a housing that includes an inlet opening and an outflow opening. The housing accommodates a fan, that conveys the air at least in the axial direction and is divided perpendicularly to an axis (X-X) of the fan into at least two housing halves that are joined together. The housing forms a chamber in which the blades of the fan rotate around an axis and has a circumferential edge area in the vicinity of which the housing has a thickness B extending in the axis direction of the fan. A motor holding part has a dimension R as the maximum extension in the edge area and the chamber has an extension in the axis direction of the fan at a height of a dimension L, whereas the extension of the air inlet part has a dimension T in the area of the chamber. A ratio of the dimension B to the dimension R with respect to the ratio of the dimension L to the dimension T is within the range from 0.9 to 1.2. The noise emission of the fan during operation is minimized and the outer diameter of the modular fan unit is kept to a minimum.