Vehicle Air Intake Control for Rainwater Ingress and AC Efficiency
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Solution Overview
Problem
Existing vehicle air conditioning systems struggle to effectively limit rainwater ingress into the outside air introduction port during rainy weather and maintain high air conditioning efficiency, especially when vehicle body inclination changes.
Innovation Solution
A vehicle air conditioning system with an inside/outside air switching door and a controller that adjusts outside and inside air intake amounts based on air conditioning load, vehicle body angle, and weather conditions, using first and second inside air intake amount calculators to optimize air conditioning efficiency and limit moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the inside air intake amount is increased to achieve high air conditioning efficiency, then air conditioning efficiency is improved, but rainwater ingress into the outside air introduction port increases
Solution Approach 1:
The system dynamically adjusts the inside air intake amount based on real-time weather conditions and vehicle body angle. The air intake amount is not fixed but varies according to environmental factors, allowing the system to optimize air conditioning efficiency while preventing rainwater ingress when necessary.
Solution Approach 2:
The controller changes the parameter of inside air intake amount based on detected weather conditions and vehicle attitude. By modifying this parameter according to external conditions, the system achieves high air conditioning efficiency under normal conditions while preventing rainwater ingress during rainy weather or when the vehicle body angle increases.
2Object-affected harmful factors
If the outside air intake amount is reduced to limit rainwater ingress, then rainwater ingress is limited, but air conditioning efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts the outside air intake amount based on real-time weather conditions and vehicle body angle. Rather than uniformly reducing intake, the system optimizes the balance between outside and inside air intake, maintaining air conditioning efficiency while limiting rainwater ingress only when necessary.
Solution Approach 2:
The controller modifies the outside air intake parameter based on detected conditions. When rainwater ingress risk is high, the system adjusts the parameter to reduce outside air intake; otherwise, it maintains optimal intake for air conditioning efficiency.
3Object-affected harmful factors
If the inside air intake amount is uniformly increased during rainy weather, then rainwater ingress is limited, but air conditioning efficiency is compromised
Solution Approach 1:
The system applies different control strategies to inside and outside air intake based on local conditions. Rather than uniformly adjusting total air intake, the system selectively adjusts the inside air component while maintaining appropriate outside air intake, preserving air conditioning efficiency while limiting rainwater ingress.
Solution Approach 2:
The system dynamically determines the inside air intake amount based on real-time weather conditions and vehicle body angle. The adjustment is not uniform or static but adapts to changing conditions, optimizing air conditioning efficiency while preventing rainwater ingress only when the vehicle body angle or weather conditions indicate risk.
Data Source
AI summary
A vehicle air conditioning system includes an inside/outside air switching door configured to adjust an outside air intake amount from an outside air introduction port and an inside air intake amount from an inside air introduction port; a first inside air intake amount calculator configured to calculate a first inside air intake amount for achieving high air conditioning efficiency, based on an air conditioning load; a second inside air intake amount calculator configured to calculate a second inside air intake amount for limiting ingress of moisture from the outside air introduction port, based on a vehicle body angle and a weather condition; and an inside air intake amount setter configured to set the inside air intake amount using the inside/outside air switching door, based on a larger one of the first inside air intake amount and the second inside air intake amount.