Vehicle HVAC Intake Structure for Filtered Airflow Mixing
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Solution Overview
Problem
Existing air-conditioning systems in vehicles face inefficiencies due to direct ventilation of exterior air into the passenger compartment, which bypasses filtration and heating/cooling processes, potentially introducing contaminants and reducing energy efficiency.
Innovation Solution
An intake structure with a case defining a mixing chamber and multiple inlet and outlet apertures, featuring moveable doors and an airflow regulator to control airflow, ensuring exterior air is filtered and heated/cooled before entering the passenger compartment, preventing direct ventilation and optimizing airflow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If exterior air is directly vented into the passenger compartment through inlet apertures, then airflow rate is increased, but air quality deteriorates and energy efficiency decreases due to bypassing filtration and heating/cooling processes
Solution Approach 1:
The inlet aperture is divided into multiple independent controllable sections (first inlet aperture, second inlet aperture, third inlet aperture) that can be selectively opened or closed. This segmentation allows the system to control airflow paths precisely, ensuring that exterior air must pass through the mixing chamber and undergo filtration and temperature adjustment before entering the passenger compartment, thereby maintaining air quality and energy efficiency while still allowing high airflow rates when needed.
Solution Approach 2:
The mixing chamber serves as an intermediary space between the inlet apertures and the passenger compartment. Exterior air entering through the third inlet aperture must pass through this mixing chamber where it can be filtered and mixed with recirculated air from the first and second inlet apertures before being delivered to the passenger compartment. This intermediary structure ensures that all air undergoes proper processing, preventing direct ventilation while maintaining high airflow capacity.
2Productivity
If multiple inlet apertures are provided for air intake, then airflow capacity is improved, but device complexity increases due to multiple doors and regulators needed for control
Solution Approach 1:
The mixing chamber serves multiple functions simultaneously: it acts as a filtration chamber, a mixing chamber for blending exterior and recirculated air, a temperature adjustment zone, and a flow distribution chamber. This multi-functionality reduces the need for separate components for each function, thereby managing device complexity while maintaining high airflow capacity through multiple inlet apertures.
Solution Approach 2:
The first door, second door, and airflow regulator are integrated into a coordinated control system that manages three different airflow paths through a single structured arrangement. The doors and regulator work together as a unified control mechanism rather than independent components, reducing overall system complexity while enabling sophisticated control over multiple inlet apertures for optimized airflow capacity.
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 exterior air from bypassing filtration and heating/cooling, enhancing air quality and energy efficiency by ensuring all air is properly processed before reaching the passenger compartment, while minimizing noise and optimizing airflow.
Implementation Method 1
the first door is configured to prevent airflow through the first inlet aperture in the first inlet aperture closed position, and allow airflow through the first inlet aperture and prevent airflow through the mixing chamber from the third inlet aperture to the first inlet aperture in the first inlet aperture open position
Implementation Method 2
the second door is configured to prevent airflow through the second inlet aperture and allow airflow through the third inlet aperture in the second inlet aperture closed position, and allow airflow through the second inlet aperture and prevent airflow through the third inlet aperture in the third inlet aperture closed position
Implementation Method 3
an airflow regulator for regulating a flow rate of airflow through the third inlet aperture
Implementation Method 4
an actuator system configured to actuate the first door and the second door in accordance with a first mode, a second mode and a third mode
Implementation Method 5
Heating of air may be performed using a heating element, such as a heat exchanger, whereby heat from exhaust gases (e.g. from an internal combustion engine) or hot water (e.g. engine cooling water, heated using electric power from a battery or a fuel cell) is transferred to the air as it passes through the heat exchanger
Implementation Method 6
Cooling of air may be performed using an evaporator, whereby the air is cooled by transferring heat in the air to a coolant in the evaporator
Data Source
AI summary
An intake structure (1a) for an air-conditioning system (100). The intake structure (1) comprises a case (10), a first door (20a), a second door (30a) and an airflow regulator (40). The case (10) defines a mixing chamber (11) comprising a first inlet aperture (12), a second inlet aperture (13), a third inlet aperture (14), and an outlet aperture (15). The first door (20a) is configured to prevent airflow through the first inlet aperture (12) in a first inlet aperture closed position and allow airflow through the first inlet aperture (12) and prevent airflow through the mixing chamber from the third inlet aperture (14) to the first inlet aperture (12) in a first inlet aperture open position. The second door (30a) is configured to prevent airflow through the second inlet aperture (13) and allow airflow through the third inlet aperture (14) in a second inlet aperture closed position and allow airflow through the second inlet aperture (13) and prevent airflow through the third inlet aperture (14) in a third inlet aperture closed position. The airflow regulator selectively regulates a flow rate of airflow through the third inlet aperture (14) when the second door (20a) is in the second inlet aperture closed position.