HVAC Airflow Turning Device with Variable-Length Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current HVAC systems require additional airflow control doors and linkages to balance airflow between multiple vehicle outlets controlled by a single HVAC case outlet, which increases complexity and manufacturing costs.
Innovation Solution
The implementation of airflow control channels of varying lengths at the HVAC case outlet, which direct airflow to different vehicle outlets by creating a pressure drop, allowing airflow regulation with a single control door, eliminating the need for multiple airflow control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional airflow control doors and linkages are added to balance airflow between multiple outlets, then airflow distribution is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The outlet is divided into multiple independent airflow control channels, each with its own control door. This segmentation allows independent control of airflow to different outlets, achieving proper airflow distribution without requiring complex linkage mechanisms between doors.
Solution Approach 2:
Each airflow control channel is designed with locally optimized geometry and control door positioning to achieve uniform airflow distribution. The control doors are positioned at specific locations within each channel to maximize control effectiveness while minimizing overall system complexity.
2Reliability
If multiple airflow control doors are used to direct airflow to different outlets, then airflow balance is improved, but manufacturing cost increases
Solution Approach 1:
The outlet assembly is segmented into separate control channels, each with its own door. This modular segmentation allows for standardized manufacturing of individual channel-door assemblies that can be produced more efficiently than complex integrated multi-door systems with linkages.
Solution Approach 2:
The linkage mechanism connecting multiple control doors is completely removed from the system. Each control door operates independently within its own channel, eliminating the need for complex linkage fabrication and assembly processes while maintaining airflow balance.
3Device complexity
If a single control door is used for multiple outlets, then device complexity is reduced, but airflow distribution control is worsened
Solution Approach 1:
The single control door is segmented into multiple independent control doors, one for each airflow channel. This segmentation provides independent control authority for each outlet while keeping each individual control mechanism simple and easy to operate.
Solution Approach 2:
Control is moved from a single-dimensional (one door for all outlets) approach to a multi-dimensional approach where each outlet has its own control dimension. This allows independent adjustment of each outlet's airflow without affecting others, greatly improving ease of operation.
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 solution effectively balances airflow between multiple outlets without additional control doors, reducing manufacturing costs and increasing reliability by simplifying the HVAC system design and eliminating unnecessary linkages.
Implementation Method 1
Different ones of the plurality of channels have different lengths to generate a varied pressure drop at the outer downstream side in response to airflow blown into the plurality of channels from the inner upstream side
Data Source
AI summary
An airflow turning device with airflow control channels for an outlet of a heating, ventilation, and air conditioning (HVAC) case that directs airflow to a plurality of different vehicle outlets. The airflow control channels extend from an inner upstream side of the outlet to an outer downstream side of the outlet. Different ones of the plurality of channels have different lengths to generate a varied pressure drop at the outer downstream side in response to airflow blown into the plurality of channels from the inner upstream side.