Central-Room Ventilation Layout to Eliminate Fresh Air Duct Contamination
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Solution Overview
Problem
Existing building ventilation systems are susceptible to pollution due to contamination of air transportation ducts, which are often not effectively cleaned.
Innovation Solution
Utilizing central rooms, such as stairwells or halls, as multipurpose air transportation channels, equipped with fans and ventilation openings in inner doors to control airflow between rooms and the central ventilation unit, thereby eliminating the need for separate fresh air supply ducts and minimizing air pressure differences and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate fresh air supply ducts are used, then air can be transported to rooms, but the ducts become susceptible to pollution and contamination
Solution Approach 1:
The patent merges the fresh air supply function with existing central rooms (stairwells, halls) that already serve as access points to multiple rooms. By combining ventilation function with existing architectural spaces, the system eliminates separate dedicated fresh air ducts that would otherwise become contaminated.
Solution Approach 2:
The central rooms serve multiple functions: they provide access to other rooms (original function) and simultaneously serve as fresh air supply channels (new ventilation function). This multi-functionality eliminates the need for dedicated ventilation ducts while maintaining effective air distribution.
2Productivity
If ventilation ducts are installed throughout the building, then fresh air can be supplied to all rooms, but the system becomes complex and requires maintenance
Solution Approach 1:
Existing central rooms serve dual purposes as both access points and air distribution channels, eliminating the need for separate complex duct networks while maintaining comprehensive air supply coverage to all connected rooms.
Solution Approach 2:
The system utilizes existing architectural structures (central rooms, stairwells) that already serve the building's access needs, making these spaces self-sufficient for both circulation and ventilation functions without requiring additional dedicated infrastructure.
3Reliability
If inner doors are sealed to prevent pollution, then room isolation is improved, but air flow control between rooms and central ventilation unit becomes difficult
Solution Approach 1:
The inner doors are equipped with adjustable ventilation means (fans, ventilation openings) that can dynamically control air flow rates. This allows the system to maintain room isolation when needed while enabling flexible air flow control to match varying ventilation requirements of different rooms and occupancy conditions.
Solution Approach 2:
The ventilation system can adjust air flow parameters (flow rate, pressure) through controllable ventilation means in the inner doors, allowing optimization of both room isolation and air distribution efficiency based on real-time conditions such as occupancy, outdoor air quality, and thermal requirements.
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
Prevents contamination of air ducts, reduces indoor pollution, enhances thermal and sound insulation, and eliminates the need for ventilation grids in windows, improving indoor climate control and visibility.
Implementation Method 1
at least part of the inner doors are provided with a ventilator, e.g. small fans... to force air to flow into or out of the relevant room from or to the central room
Implementation Method 2
The ventilation means may comprise a mixing fan that is adapted to mix air from the central room and the respective rooms that can be entered via the inner doors provided with said mixing fans
Implementation Method 3
The ventilation unit may be constituted by a heat recovery ventilation unit comprising means for forced air movement from the outside to the inside and means for forced air movement from the inside of the building to the outside
Data Source
Figure 1
Figure 2~2b
AI summary
Building ventilation system, comprising a ventilation unit (4) mainly in the top area of the building, arranged for exchanging the air inside and outside the building, a central room (6), e.g. a stairwell or hall, via which several other rooms can be entered via inner doors; and ventilation means (8) in at least part of inner doors arranged to enable air to move from the central room to the relevant other room or vice versa. Preferably, the ventilation means are at least partially constituted by fans arranged to force air to move from and to the central room. Means (10) may be provided for setting climate parameters, measuring climate variables and controlling the speed and/or direction of the inner door ventilators.