Ventilation arrangements
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Solution Overview
Problem
Existing ventilation systems for buildings face inefficiencies in air distribution and flow, leading to overheating due to heat gains from occupants and solar radiation, and are often costly to operate with mechanical systems.
Innovation Solution
A ventilation arrangement featuring a duct divided by longitudinally extending divider plates, a guide member with a non-uniform profiled surface, and formations on the guide member to engage with louvre configurations, allowing for adjustable and efficient air flow management, made from recyclable plastics material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical ventilation systems are used to provide ventilation to buildings, then adequate ventilation can be achieved, but electricity consumption increases and operational costs become expensive
Solution Approach 1:
The ventilation system utilizes natural wind forces and pressure differentials created by the building structure itself to drive air flow through the duct. The dome-shaped element and strategically positioned openings allow the system to self-regulate and operate without mechanical power input, eliminating electricity consumption while maintaining ventilation effectiveness.
Solution Approach 2:
The patent replaces mechanical ventilation components (fans, motors, powered actuators) with a passive mechanical structure that relies on natural physical phenomena - specifically wind pressure and buoyancy-driven convection currents - to achieve air movement and exchange within the building.
2Device complexity
If a simple duct configuration is used for ventilation, then device complexity is reduced, but airflow efficiency decreases leading to overheating
Solution Approach 1:
The duct is divided into multiple functional sections by divider plates that create separate air intake and exhaust zones. This segmentation allows independent optimization of air flow paths - fresh air enters through windward openings and is directed along one path, while stale air is extracted through leeward openings along a separate path, significantly improving ventilation efficiency without requiring complex external control systems.
Solution Approach 2:
The ventilation system employs asymmetric positioning of openings and divider plates relative to the duct axis, with different configurations on windward and leeward sides. This asymmetric design creates optimized pressure differentials and flow patterns that maximize natural convection currents and wind-driven air exchange, achieving high airflow efficiency through geometric optimization rather than mechanical complexity.
3Ease of manufacture
If the guide member has a uniform profile, then manufacturing is simplified, but airflow distribution and flow patterns cannot be optimized
Solution Approach 1:
The guide member features a non-uniform profile with varying cross-sectional dimensions and contour shapes at different locations along its length. This local variation in geometry is specifically designed to optimize air flow distribution at each stage of the ventilation process - narrower sections accelerate flow, while expanded sections allow for better mixing and distribution, achieving superior air handling performance through geometric optimization.
4Device complexity
If the duct is not divided into quadrants, then device complexity is reduced, but airflow management and ventilation effectiveness decrease
Solution Approach 1:
The duct cross-section is divided into four distinct quadrants by perpendicular divider plates, creating separate functional zones for air intake and exhaust. This segmentation enables the system to simultaneously handle multiple air flow streams - fresh air intake on windward sides, stale air extraction on leeward sides - thereby ensuring reliable and effective ventilation through organized flow separation without requiring complex external control mechanisms.
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
Enhances airflow efficiency, reduces operational costs by optimizing air distribution and flow patterns, and provides structural support for the ventilation system, accommodating various sizes and wind conditions.
Implementation Method 1
a guide member with a non-uniform profiled surface, and formations on the guide member to engage with louvre configurations, allowing for adjustable and efficient air flow management
Implementation Method 2
During use air can enter the windward side of the duct through respective openings, with stale air exiting from the building through respective openings on the leeward side of the duct
Implementation Method 3
The divider plates may divide the air duct into four quadrants... the quadrant nearest the windward side receiving the most air to ventilate the building, whilst the majority of air extracted from the building exits through the opposite quadrant on the leeward side
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A ventilation arrangement housing (10) which has an upper curved guide member (18) and a cruciform arrangement of divider plates (14) to define the housing (10) into quadrants. Air may enter and exit the housing (10) via a louvre arrangement (16).