Vehicle Air Conditioning Bypass Circuit Nesting
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Solution Overview
Problem
Existing air conditioning devices for motor vehicles face challenges in compact design while maintaining aeraulic and acoustic performance, particularly when integrating a bypass circuit without increasing volume or reducing the size of the volute.
Innovation Solution
The air conditioning device incorporates a bypass circuit arranged above the evaporator and next to the volute, utilizing a centrifugal air channeling casing with ducts on either side, and a motor-driven wheel within the volute, with adjustable flaps to control airflow, allowing for compact integration without reducing volute size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a bypass circuit is integrated into the air conditioning device, then energy efficiency is improved, but device volume increases
Solution Approach 1:
The bypass circuit ducts are nested within the space above the evaporator and alongside the volute, utilizing existing device volume rather than adding to it. The ducts are positioned to follow the contours of the volute and evaporator assembly, effectively nesting the bypass functionality within the existing structural envelope.
Solution Approach 2:
The bypass circuit is arranged in the vertical dimension above the evaporator rather than expanding horizontally. By positioning ducts above the evaporator and alongside the volute in the vertical space, the design adds bypass functionality without increasing the horizontal footprint of the device.
2Volume of stationary object
If the volute size is reduced to compact the device, then device volume decreases, but aeraulic performance deteriorates
Solution Approach 1:
The design maintains the full volute size for optimal aerodynamic performance while achieving compactness through alternative means - by utilizing vertical space above the evaporator for the bypass circuit. The volute is not reduced in size but rather the overall device is compacted by efficient spatial arrangement in the vertical dimension.
3Device complexity
If the bypass circuit is placed between the volute and evaporator, then integration is simplified, but device volume increases
Solution Approach 1:
Instead of placing bypass ducts between the volute and evaporator in the horizontal plane, the design moves the bypass circuit to the vertical dimension above the evaporator. This dimensional shift allows the bypass functionality to be integrated without increasing the horizontal footprint or overall device volume.
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 maintains compactness, aeraulic performance, and acoustic efficiency by allowing air to bypass the evaporator without increasing the device's volume, enabling efficient air circulation and temperature regulation while allowing for easy maintenance.
Implementation Method 1
an air circulation element which comprises a centrifugal air channeling casing, called volute
Implementation Method 2
an air heating radiator and a evaporator for cooling the air
Implementation Method 3
The air circulation element includes a motor driving a wheel located inside the volute
Data Source
Figure 1~5
AI summary
The invention relates to an air-conditioning device (1) for a motor vehicle, comprising an element for circulating air towards an evaporator (4), characterised in that the device (1) also comprises a bypass circuit (9) allowing air circulation between a zone located upstream of the evaporator (4) and a zone located downstream of the evaporator (4), the air bypass circuit (9) being arranged above the evaporator (4).