Tangential Fan Support Layout for Quieter Air Conditioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In air conditioning devices, the wind noise generated through the blown air increases noise levels, and existing solutions fail to effectively reduce blade pitch sound without affecting air blowing performance.
Innovation Solution
An air conditioning device design featuring a tangential fan, a columnar support inclined with respect to the rotation axis, and a heat exchanger, which disperses wind noise frequencies to prevent resonance with blade pitch sound frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the shape of blades or tongue region is improved to reduce blade pitch sound, then blade pitch sound is reduced, but device complexity increases
Solution Approach 1:
The patent introduces a tongue portion as an intermediary structure between the fan blades and the housing wall. This tongue portion with its specific curved shape acts as a mediator that absorbs and disperses the blade pitch sound, preventing direct contact and noise generation between blades and housing, thus reducing noise without complicating blade design
Solution Approach 2:
The patent extracts the noise reduction function from the blade shape itself and relocates it to a separate tongue portion structure. By removing the noise-generating interaction between blades and housing wall, the solution addresses blade pitch sound without requiring complex blade modifications
2Object-generated harmful factors
If wind noise is reduced by modifying air passage, then wind noise is reduced, but air blowing performance deteriorates
Solution Approach 1:
The patent applies local quality modification by creating a specific curved shape only in the tongue portion region where noise is generated, while keeping the rest of the air passage structure simple and efficient for air flow. This localized curvature modification reduces wind noise without affecting overall air blowing performance
Data Source
AI summary
An air conditioning device includes a tangential fan, a columnar support, a heat exchanger that is disposed between the columnar support and the tangential fan, and a mechanism configured to rotate the tangential fan around a rotation axis and cause air to pass through the heat exchanger, wherein at least some part of the columnar support is placed along a straight line that is inclined with respect to the rotation axis.