Vehicle Air Conditioning Deflection Guide for Homogeneous Air Velocity
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Solution Overview
Problem
Existing vehicle air conditioning devices with offset blower units suffer from inhomogeneous air velocity distribution, leading to uneven temperature and comfort issues within the vehicle interior due to increased fluid resistance and complex structures.
Innovation Solution
A vehicle air conditioning device with a deflection guide that includes a plate-shaped deflection portion inclined relative to the evaporator's inflow plane, redirecting air flow to homogenize the air velocity distribution and reduce fluid resistance, while being easy to manufacture and integrate with the blower unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple protrusions are provided to form steps in the blower unit, then air velocity distribution is improved, but device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The deflection function is extracted from the blower unit wall surface and implemented as a separate deflection guide component. This simple plate-shaped component with an inclined deflection portion is positioned upstream of the evaporator to redirect air flow, achieving homogeneous air velocity distribution without modifying the complex blower unit structure.
Solution Approach 2:
A deflection guide serves as an intermediary component between the blower unit and the evaporator. This simple plate-shaped structure mediates the air flow by deflecting it toward the evaporator inlet, resolving the air velocity distribution issue without requiring complex modifications to either the blower unit or evaporator.
2Manufacturing precision
If multiple protrusions are provided to form steps in the blower unit, then air velocity distribution is improved, but ease of manufacture deteriorates
Solution Approach 1:
The deflection function is extracted from the blower unit wall surface and implemented as a separate deflection guide component. This simple plate-shaped component with an inclined deflection portion is positioned upstream of the evaporator to redirect air flow, achieving homogeneous air velocity distribution without modifying the complex blower unit structure.
Solution Approach 2:
The deflection guide is implemented as a simple, inexpensive plate-shaped component that can be easily manufactured and installed. Rather than investing in complex mold modifications or multi-part structures, this simple deflector provides the necessary flow control at minimal manufacturing cost and complexity.
3Manufacturing precision
If air flow is deflected toward the evaporator inlet, then homogeneous air velocity distribution is achieved, but fluid resistance increases
Solution Approach 1:
The deflection guide applies partial deflection rather than forcing complete flow redirection. The inclined plate shape gently guides a portion of the air flow toward the evaporator inlet, achieving homogeneous distribution without creating excessive resistance. The deflection is sufficient to correct the velocity distribution but not so aggressive as to cause significant pressure loss.
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
The solution achieves a homogeneous air velocity distribution across the evaporator, correcting uneven temperature issues within the vehicle and reducing manufacturing complexity and costs by integrating the deflection guide with the blower unit.
Implementation Method 1
The deflection guide is disposed upstream of the evaporator in a direction of a flow of air flowing into the inflow plane of the evaporator, and deflects a flow of the air from the blower to the inflow plane of the evaporator
Implementation Method 2
The temperature regulation unit has an evaporator provided with an inflow plane extending in a flow direction of the air blown from the blower and configured to exchange heat with air inflowing through the inflow plane
Data Source
AI summary
A vehicle air conditioning device has an air-conditioning unit including a temperature regulation unit having an evaporator and a blower unit including a blower. The blower unit is offset to a side of the temperature regulation unit. A deflection guide to deflect a flow of air is provided upstream of the evaporator in a flow of air flowing into an inflow plane of the evaporator from the blower. The deflection guide has a plate-like defection portion inclined with respect to the inflow plane, and a support portion supporting the deflection portion by extending from the blower unit. A gap is provided between the support portion and the evaporator. Air that has collided with the deflection portion is changed in flow direction to head for the blower side of the inflow plane.