Vehicle Ventilation Ducting for Cabin Oxygen and A/C Recirculation
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Solution Overview
Problem
Closed car windows during air conditioning operation lead to poor ventilation and reduced oxygen concentration in vehicle compartments, causing driver fatigue and increased risk of accidents.
Innovation Solution
A ventilation system integrated with the air conditioning apparatus, featuring a vent pipe and fan that communicates outside air into the vehicle interior, with a controller managing airflow to maintain optimal oxygen levels by switching between external and internal circulation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If car windows are closed during air conditioning operation, then temperature stability inside the passenger compartment is improved, but ventilation and oxygen concentration are reduced
Solution Approach 1:
The air conditioning system is divided into two independent air circulation paths: an internal circulation path that recycles air inside the vehicle for temperature stability, and an external circulation path that introduces fresh air from outside through the vent pipe for ventilation and oxygen replenishment. This segmentation allows both temperature control and air freshness to be achieved simultaneously.
Solution Approach 2:
The air conditioning system is designed to perform multiple functions: it can operate in internal circulation mode for temperature stability, in external circulation mode for ventilation and oxygen replenishment, or in a combined mode. The system universally handles both thermal comfort and air quality requirements through a single integrated design.
2Temperature
If car windows are closed during air conditioning operation, then temperature control is improved, but driver fatigue and accident risk increase
Solution Approach 1:
The system segments air circulation into internal and external paths, allowing the vehicle to maintain temperature control while periodically introducing fresh air to prevent driver fatigue. The controller manages switching between modes to ensure both temperature stability and driver alertness.
Solution Approach 2:
The controller monitors system operation and automatically switches between internal and external circulation modes based on operational duration and air quality conditions, providing feedback control that maintains both temperature comfort and adequate ventilation for driver safety.
3Quantity of substance
If a ventilation system with vent pipe and fan is added, then oxygen concentration is improved, but device complexity increases
Solution Approach 1:
The ventilation system is merged with the existing air conditioning system by integrating the vent pipe and fan into the AC's air duct structure. The vent pipe is disposed within the air duct, and both systems share common components and control mechanisms, reducing overall complexity compared to a completely separate ventilation system.
Solution Approach 2:
The air conditioning system is designed to perform multiple functions: it can operate in internal circulation mode for temperature stability, in external circulation mode for ventilation and oxygen replenishment, or in a combined mode. The system universally handles both thermal comfort and air quality requirements through a single integrated design.
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 ensures a normal oxygen concentration in the vehicle interior, reducing driver fatigue and accident risks by periodically introducing fresh air from outside, thus addressing the issue of poor ventilation and low oxygen levels.
Implementation Method 1
The fan is disposed in the vent pipe, and is configured to be activated to produce airflow from the outside communicating end to the inside communicating end
Implementation Method 2
The blower is disposed in the air duct, and is configured to be controlled to drive air to flow from the external inlet end through the A/C device to said plurality of outlet ends
Data Source
AI summary
A ventilation system is adapted to be used in a vehicle. The vehicle includes a vehicle body that defines an interior space. The ventilation system includes a vent pipe and a fan. The vent pipe is adapted to be disposed on the vehicle body, and has an outside communicating end via which the vent pipe is adapted to communicate with the outside of the vehicle body, and an inside communicating end via which the vent pipe is adapted to communicate with the interior space. The fan is disposed in the vent pipe, and is configured to be activated to produce airflow from the outside communicating end to the inside communicating end.