Dual-Zone Vehicle Air Conditioning Bypass Circuits
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Solution Overview
Problem
Dual-zone air conditioning systems in motor vehicles often experience flow imbalances between circuits, leading to unwanted temperature differences, which existing technologies fail to adequately address.
Innovation Solution
The air conditioning device incorporates two bypass circuits with adjustable air flow control flaps positioned above the evaporator, allowing for independent temperature regulation and flow adjustment in each zone, compensating for flow imbalances by using centrifugal shroud air channels and independently controlled micro-motors to operate the flaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bypass circuits are added to enable dual-zone temperature control, then temperature regulation capability is improved, but flow imbalance between circuits occurs causing unwanted temperature differences
Solution Approach 1:
The patent applies local quality by providing independent control mechanisms (flaps) in each bypass circuit to adjust air flow locally. This allows each circuit to be optimized independently, compensating for flow imbalances and achieving uniform temperature distribution across different zones despite the presence of bypass paths.
Solution Approach 2:
The patent implements dynamics by making the bypass circuits adjustable through control flaps that can change their opening positions dynamically. This enables the system to adapt the air flow distribution in real-time to compensate for flow imbalances and maintain consistent temperature output, transforming static bypass paths into dynamically controllable circuits.
2Stability of the object's composition
If control flaps are added to each bypass circuit to adjust air flow, then flow balance is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing control flaps that serve multiple functions: they regulate air flow distribution, compensate for flow imbalances, and enable dual-zone temperature control. This multi-functionality reduces the need for separate components for each control objective, thereby limiting the increase in device complexity despite the added control capability.
3Loss of energy
If bypass circuits are implemented, then energy efficiency is improved, but temperature uniformity deteriorates due to flow imbalance
Solution Approach 1:
The patent implements feedback by using sensors to detect temperature and air flow conditions in each circuit, then using this information to dynamically adjust the control flaps. This closed-loop control ensures that energy-efficient bypass operation is maintained while automatically compensating for flow imbalances that would otherwise cause temperature non-uniformity.
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 enables precise temperature control and flow adjustment in dual-zone systems, maintaining aeraulic and acoustic performance while preventing volume increase, effectively mitigating flow imbalances and ensuring consistent temperature delivery across vehicle zones.
Implementation Method 1
the air circulating member includes a centrifugal shroud air channeling chamber, called a volute
Implementation Method 2
an evaporator for cooling the air
Data Source
Figure 1~3
AI summary
The invention relates to an air-conditioning device for a motor vehicle, comprising an evaporator (4) and at least two circuits (9, 9') for bypassing said evaporator, allowing the circulation of air between a zone located upstream of the evaporator (4) and a zone located downstream of the evaporator (4), a first (9) of said bypass circuits being used to supply a first part of said device and a second (9') of said bypass circuits being used to supply a second part of said device, at least one of the bypass circuits (9, 9') comprising a flap for controlling the air flow (10, 10').