HVAC Inlet Subassembly with Divider for Airflow Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing two-layer HVAC systems for vehicles lack efficient control over airflow management, leading to suboptimal heating efficiency and increased window fogging, as they fail to effectively separate and direct fresh and recirculated airflows within the cabin.
Innovation Solution
An improved inlet subassembly with a divider creating independent airflow paths for fresh and recirculated air, featuring movable inlet doors and an optional RAM air door to control airflow, ensuring separate routing of fresh and recirculated air through the system to prevent mixing and optimize cabin ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single airflow path is used in existing HVAC systems, then the device complexity is reduced, but the heating efficiency deteriorates and window fogging increases due to inability to separate fresh and recirculated airflows
Solution Approach 1:
The inlet subassembly is segmented into multiple independent airflow paths (first airflow path for fresh air, second airflow path for recirculated air) separated by a divider. Each path has its own inlet door (first inlet door, second inlet door) that can be independently controlled. This segmentation allows fresh and recirculated air to be directed to different cabin zones without mixing, improving heating efficiency and preventing window fogging while maintaining manageable system complexity through modular design.
2Use of energy by moving object
If fresh air is recirculated at the lower area to improve heating efficiency, then energy consumption is reduced, but window fogging increases due to lack of fresh air supply
Solution Approach 1:
The system segments airflow management into distinct paths: the second airflow path recirculates warm air at the lower cabin area to improve heating efficiency and reduce energy consumption, while the first airflow path supplies fresh air to the upper cabin area to prevent window fogging. The divider physically separates these paths, and independent inlet doors allow the system to maintain this separation and optimize both heating efficiency and anti-fogging performance simultaneously.
3Ease of operation
If independent airflow paths are implemented for upper and lower cabin areas, then airflow management precision is improved, but the device complexity increases due to additional dividers and control doors
Solution Approach 1:
The inlet subassembly is divided into separate sections with a divider creating distinct first and second airflow paths. Each path has its own inlet door (first inlet door, second inlet door) that can be independently actuated to control fresh air and recirculated air respectively. This segmentation provides precise airflow management for different cabin zones while the modular structure keeps the complexity manageable through standardized components.
Solution Approach 2:
The inlet doors (first inlet door, second inlet door) are designed to be movable and independently controllable, allowing dynamic adjustment of airflow paths based on operating conditions. This dynamic control enables the system to adapt airflow distribution to match varying thermal and ventilation requirements of different cabin zones, improving ease of operation despite the presence of multiple control elements.
Data Source
AI summary
An inlet subassembly for a heating, ventilation, and air conditioning (HVAC) system. The inlet subassembly includes a divider defining a first airflow path and a second airflow path on opposite sides of the divider. The first airflow path extends from a first side of the recirculation air inlet and a first side of the fresh air inlet. The second airflow path extends from a second side of the recirculation air inlet and a second side of the fresh air inlet. A first inlet door is movable to control airflow into the first airflow path from the first side of the recirculation air inlet or the first side of the fresh air inlet. A second inlet door is movable to control airflow into the second airflow path from the second side of the recirculation air inlet or the second side of the fresh air inlet.