Vehicle Cabin Air Conditioning Exhaust Heat Extraction
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Solution Overview
Problem
Conventional vehicle cabin air conditioning systems face challenges in maintaining comfort by suppressing the influence of exhaust heat from individual air conditioners, which can cause mist during cooling or chill during heating, leading to increased discomfort and higher air conditioning loads due to negative cabin pressure and external odor intrusion.
Innovation Solution
A vehicle cabin air conditioning system comprising a cabin indoor air conditioner and an individual air conditioner with a blower, heat generator, supply port, and exhaust port, where the exhaust air is guided through an air flow path to the suction port of the cabin indoor air conditioner, allowing for temperature adjustment and minimizing power deterioration by directing exhaust heat externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If exhaust air from individual air conditioner is discharged directly into the cabin, then air conditioning function is provided, but exhaust heat causes discomfort (mist during cooling or chill during heating)
Solution Approach 1:
The harmful exhaust heat is extracted from the cabin environment by guiding it through a dedicated exhaust air flow path to the outside of the vehicle. The exhaust port is positioned to discharge air externally, separating the harmful thermal effect from the occupant space while maintaining the air conditioning function.
Solution Approach 2:
A dedicated exhaust air flow path acts as an intermediary channel between the individual air conditioner's exhaust port and the external environment. This intermediate pathway directs exhaust air away from the cabin, preventing direct contact with occupants while preserving the air conditioning operation.
2Stability of the object's composition
If exhaust air is discharged into the cabin, then air circulation is maintained, but negative cabin pressure causes external odor intrusion
Solution Approach 1:
The exhaust air is extracted from the cabin through a dedicated exhaust path that discharges to the external environment. This extraction mechanism maintains positive cabin pressure by providing an outward airflow path, preventing external odors from intruding while preserving air circulation functionality.
Solution Approach 2:
The exhaust air flow path serves as an intermediary system that manages air pressure balance. By providing a controlled pathway for exhaust air to exit the cabin, it maintains positive pressure differential, blocking external odor intrusion while sustaining internal air circulation.
3Device complexity
If exhaust heat is not managed, then system complexity is reduced, but air conditioning load increases due to discomfort suppression requirements
Solution Approach 1:
The exhaust heat is extracted and removed from the cabin environment through a dedicated exhaust port and flow path. This extraction prevents heat accumulation that would otherwise increase air conditioning load, achieving energy efficiency without adding significant system complexity.
Solution Approach 2:
The exhaust air flow path acts as an intermediary that efficiently removes thermal energy from the cabin. By providing a dedicated pathway for hot exhaust air to escape, the system reduces the cooling load on the air conditioner without requiring complex thermal management systems.
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
This configuration diversifies air conditioning modes, enhances occupant comfort by reducing discomfort from exhaust heat, maintains positive cabin pressure, and minimizes power consumption by operating the cabin indoor air conditioner in a high Coefficient of Performance (COP) state.
Implementation Method 1
The heat generator concurrently generates cold heat for cooling air blown by the blower and warm heat for heating the air inside the housing
Implementation Method 2
The blower is arranged inside a housing... The blower blows air to be supplied into the target space
Implementation Method 3
a vehicle cabin air conditioning system further has an air flow path that guides the air from the exhaust port of the individual air conditioner to the suction port of the cabin indoor air conditioner
Data Source
AI summary
A vehicle cabin air conditioning system includes a cabin indoor air conditioner and an individual air conditioner configured to condition air in a target space inside a cabin. The individual air conditioner includes a blower, a heat generator, a supply port, and an exhaust port. The supply port supplies one of a cold air cooled with the heat generator and a warm air heated with the heat generator to the target space. The exhaust port provides the other of the cold air and the warm air to outside of the target space. The cabin indoor air conditioner includes a cabin blower, a temperature control unit, and a suction port through which air is sucked for the temperature control unit. An air flow path is provided to guide air sent from the exhaust port of the individual air conditioner to the suction port of the cabin indoor air conditioner.