V-Shaped Temperature Door for Vehicle HVAC Stratification
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Solution Overview
Problem
Existing HVAC air-handling systems for vehicles face challenges in optimizing temperature stratification while minimizing cost, weight, airflow reduction, noise, and flow efficiency, often failing to meet desired stratification targets due to the addition of components like baffles and mixing plates.
Innovation Solution
A temperature door with a V-shaped design, pivotally mounted in the air-handling system, allows selective airflow between hot and cold paths by varying its position between different flow paths, minimizing the need for additional components and optimizing stratification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If secondary features including baffles, conduits, mixing plates, and/or additional doors are added to control temperature stratification, then stratification control is improved, but device complexity, weight, cost, airflow reduction, noise, and flow efficiency degradation occur
Solution Approach 1:
The patent removes secondary features such as baffles, conduits, mixing plates, and additional doors from the HVAC system. By extracting these unnecessary components, the system achieves temperature stratification control through the primary temperature door alone, thereby reducing device complexity, weight, and cost while improving airflow efficiency and reducing noise.
Solution Approach 2:
The temperature door is designed to perform multiple functions: it controls temperature stratification, manages airflow distribution, and eliminates the need for separate mixing components. This multi-functional design allows a single component to achieve what previously required multiple secondary features, simplifying the overall system architecture.
2Temperature
If secondary features including baffles, conduits, mixing plates, and/or additional doors are added to control temperature stratification, then stratification control is improved, but weight and cost of the system increase
Solution Approach 1:
The patent eliminates secondary features such as baffles, conduits, mixing plates, and additional doors that contribute to system weight. By removing these components and relying on the temperature door's optimized design, the system achieves the required temperature stratification control with reduced weight.
3Temperature
If secondary features including baffles, conduits, mixing plates, and/or additional doors are added to control temperature stratification, then stratification control is improved, but airflow and flow efficiency are reduced
Solution Approach 1:
The patent removes secondary features such as baffles, conduits, mixing plates, and additional doors that obstruct airflow paths. By eliminating these flow-restricting components, the system maintains higher airflow volumes and improved flow efficiency while still achieving effective temperature stratification control through the temperature door's positioning and design.
4Temperature
If secondary features including baffles, conduits, mixing plates, and/or additional doors are added to control temperature stratification, then stratification control is improved, but noise increases
Solution Approach 1:
The patent eliminates secondary features such as baffles, conduits, mixing plates, and additional doors that generate noise through airflow turbulence and interaction. By removing these noise-generating components, the system achieves temperature stratification control with significantly reduced noise levels.
Data Source
AI summary
A temperature door for air-handling system of a heating, ventilating, and air conditioning system for a vehicle is disclosed, wherein a cost and a weight of the system are minimized and a temperature stratification, a flow efficiency, and a NVH/noise of the system are optimized.