Vehicle Blower Guide Walls for Uniform Air Flow and Noise Reduction
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Solution Overview
Problem
Existing vehicle blowers with unidirectional suction type blower fans experience uneven air flow distribution, leading to reduced air volume and increased noise due to turbulent flows, and the use of vertically parted molds for intake ducts results in air filter deformation and drooping issues.
Innovation Solution
A blower design incorporating guide walls on the bypass passageway between the scroll case and outer case to create zones, ensuring uniform air flow and supporting the air filter, while using a bidirectional suction type blower fan and a dome-like intake door to manage air intake and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If guide walls are formed on the bypass passageway to create zones, then air flow uniformity is improved and suction noise is reduced, but device complexity increases
Solution Approach 1:
The bypass passageway is divided into multiple zones by forming guide walls that extend from the scroll case to the outer case. This segmentation creates separate flow paths that guide air uniformly to the lower suction opening, reducing turbulent flow and suction noise while maintaining a manageable structural complexity
Solution Approach 2:
Guide walls are introduced as intermediary structures within the bypass passageway. These guide walls act as mediators that redirect and organize the air flow between the scroll case and outer case, creating uniform flow patterns without requiring complete redesign of the entire blower system
2Ease of manufacture
If an intake duct injection-molded in a vertically parted mold is used, then manufacturing ease is improved, but air filter support is insufficient causing droop
Solution Approach 1:
The intake duct is designed to serve multiple functions: it maintains the air passage function while also incorporating an integrated support structure for the air filter. This multi-functional design allows the same component to provide both airflow management and structural support, eliminating the need for additional separate support parts
Solution Approach 2:
The support structure for the air filter is merged with the intake duct itself. The intake duct includes integrated support ribs or protrusions that directly support the air filter, combining what would traditionally be separate components into a single injection-molded part, thereby maintaining ease of manufacture while ensuring reliable support
Data Source
AI summary
The present invention relates to a blower for vehicles, which includes guide walls formed on a bypass passageway formed between a scroll case and an outer case to send the indoor air and the outdoor air to a lower suction opening of the scroll case, thereby reducing suction noise by guiding a uniform flow of air introduced into the lower suction opening, preventing deformation of the outer case, and preventing a droop of the air filter by supporting a lower portion of an air filter when an intake duct injection-molded in a vertically parted mold is applied thereto.