Dual Scroll Bi-Directional Blower for Ventilation Seats
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Solution Overview
Problem
Bi-directional blowers used in ventilation seats face challenges in achieving sufficient scroll length, flow amount, and noise reduction due to their design, which limits their performance and comfort provided to seating passengers.
Innovation Solution
A dual scroll type bi-directional blower is designed with a blower body that divides its inner space into upward and downward sections, forming a chamfer or stepwise shape to create longer scroll lengths, allowing for improved flow distribution and noise reduction through specific cross-sectional angles and exit rib adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bi-directional discharge port is used to distribute wind to seat cushion and seat back, then the blower can provide ventilation to multiple areas, but the scroll length becomes insufficient
Solution Approach 1:
The blower body is divided into an upper discharge case and a lower discharge case, each handling one direction of airflow. This segmentation allows each scroll to be optimized independently for sufficient length while achieving bi-directional discharge capability through the combined structure of both cases.
2Device complexity
If the scroll length is shortened to accommodate bi-directional discharge, then the blower structure can fit space constraints, but the flow amount becomes insufficient
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement by dividing the blower into upper and lower cases with optimized scroll geometries. This dimensional approach allows sufficient scroll length to be achieved within compact external dimensions, maintaining both compactness and adequate flow amount.
3Volume of moving object
If the scroll space is narrowed to reduce blower size, then the installation space is reduced, but noise increases
Solution Approach 1:
The upper and lower discharge cases are designed with optimized local scroll geometries and cross-sectional angles that maintain sufficient flow passage width despite compact overall dimensions. This local optimization reduces turbulence and noise while keeping the blower size small for reduced installation space.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dual scroll structure enhances flow amount by 10-15% and reduces noise while maintaining conventional assembly methods and material costs, providing a more comfortable and efficient air circulation experience.
Implementation Method 1
a blower body guiding for air to flow along the entire circumference scroll shape of an inner space
Data Source
AI summary
A bi-directional blower includes a blower body for guiding for air to flow along an entire circumference scroll shape of an inner space of the blower body. The blower body divides the inner space into an upward space and a downward space to guide air flow. The blower body comprises: an upper discharge case discharging the air flow along the entire circumference scroll shape toward the upward space through an upper discharge port; and a lower discharge case discharging the air flow along the entire circumference scroll shape toward the downward space through a lower discharge port.