Single-Fan Ventilation Layout for Quiet Compact Air Exchange
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Solution Overview
Problem
Conventional ventilating systems are large, costly, noisy, and consume high power due to the use of two fans and complex configurations, which are inefficient for air exchange in closed spaces.
Innovation Solution
A ventilating system design featuring a single fan that operates in both air supply and discharge modes, integrated with a heat exchanger, dampers, and bypasses to control airflow, and includes filters for air purification, reducing the need for multiple fans and optimizing airflow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If two fans are used for air supply and discharge, then air exchange function is improved, but device size and cost increase
Solution Approach 1:
A single fan is designed to perform both air supply and air discharge functions by strategically positioning it at the intersection of the air supply passage and air discharge passage. The fan draws outdoor air into the air supply passage while simultaneously discharging room air through the air discharge passage, eliminating the need for separate fans and reducing device complexity.
2Productivity
If two fans are used for air supply and discharge, then air exchange function is improved, but manufacturing cost increases
Solution Approach 1:
The air supply fan and air discharge fan are merged into a single fan unit. This consolidation reduces the number of components that need to be manufactured, assembled, and maintained, thereby lowering manufacturing costs while preserving the dual function of air supply and discharge.
3Productivity
If two fans are used for air supply and discharge, then air exchange function is improved, but noise level increases
Solution Approach 1:
By designing a single fan to perform both air supply and discharge functions, the system reduces the total number of rotating components that generate noise. The fan is positioned to efficiently move air in both directions simultaneously, achieving the required air exchange function with lower overall noise levels compared to two separate fans.
4Productivity
If two fans are used for air supply and discharge, then air exchange function is improved, but power consumption increases
Solution Approach 1:
The system merges two fan operations into one, reducing power consumption by eliminating the energy required to operate a second fan motor and drive a second set of blades. The single fan is positioned to leverage airflow paths that enable both air supply and discharge functions simultaneously, achieving energy efficiency while maintaining effective air exchange.
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 system achieves a compact, cost-effective, and quiet operation with reduced power consumption while ensuring fresh and filtered air exchange, providing a comfortable indoor environment by minimizing noise and energy usage.
Implementation Method 1
a heat exchanger in the case to make the outdoor air and the room air to cross and heat exchange with each other
Data Source
AI summary
Ventilating system including a case in communication with a room, an air supply passage in the case for drawing outdoor air into the room, an air discharge passage in the case for discharging room air to an outside of the room, and a fan both in the air supply flow passage and the air discharge flow passage in the case, thereby providing a compact, low noise, and low cost ventilating system.