Vehicle Air Conditioning Guide Plates for Temperature Stability
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Solution Overview
Problem
Existing air conditioning devices for vehicles experience temperature fluctuations due to unintended heating of cold air by the downstream wall surface of the heating heat exchanger, particularly during the FACE mode Max Cool, where a large volume of bypass air flows above the heating heat exchanger and exchanges heat with the downstream wall surface.
Innovation Solution
The air conditioning device incorporates an airflow regulation wall with guide plates that direct air flows to prevent contact heating by creating separate paths for air to bypass the heating heat exchanger, using a first guide extending upward, a second guide extending downward, and a third guide to restrict contact heating air, with specific dimensions to optimize airflow and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large volume of bypass air flows above the heating heat exchanger during FACE mode Max Cool, then the cooling effect is enhanced, but the air is heated by the downstream wall surface of the heating heat exchanger causing temperature fluctuation
Solution Approach 1:
The airflow regulation wall segments the airflow path into distinct regions using guide plates. The first guide plate creates a separation between the bypass air flow and the downstream wall surface of the heating heat exchanger, preventing direct contact and unintended heating while maintaining the bypass air flow for cooling effectiveness.
Solution Approach 2:
The airflow regulation wall acts as an intermediary structure between the bypass air and the heating heat exchanger downstream wall. It introduces a physical barrier (guide plates) that mediates the interaction between cold bypass air and the potentially heating wall surface, eliminating harmful heat transfer while preserving airflow patterns.
2Temperature
If guide plates are added to regulate airflow, then contact heating is restricted, but device complexity increases
Solution Approach 1:
The airflow regulation wall is merged with the existing heating heat exchanger assembly, integrating the guide plates into the overall structure. This combination approach adds airflow regulation functionality without requiring a completely separate system, thereby limiting the increase in device complexity.
Solution Approach 2:
The airflow regulation wall serves multiple functions: it regulates airflow direction, prevents contact heating, and maintains proper air distribution. By combining multiple functions into a single structure, the patent avoids adding separate components for each function, thus limiting complexity increase while achieving multiple objectives.
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 effectively restricts the generation of contact heating air, stabilizing the temperature of air conditioning air and reducing ventilation resistance and noise, while maintaining a preferable air volume ratio.
Implementation Method 1
a cooling heat exchanger (8) that cools an inside air which is an air inside a vehicle compartment and an outside air which is an air outside the vehicle compartment
Implementation Method 2
a heating heat exchanger (9) that heats a cold air which is the air that has passed through the cooling heat exchanger (8)
Data Source
AI summary
An air conditioning device for vehicle has guide plates that guide a flow of air on a downstream side of a heating heat exchanger. In order to form a first path, the guide plates have a first guide that extends from a downstream wall surface of the heating heat exchanger and bends in an upward direction. Further, in order to hold a heat exchanger other than a cooling heat exchanger and the heating heat exchanger, the guide plates have a second guide that extends from an upper end part of the heating heat exchanger and bends in a downward direction. Furthermore, the guide plates have a third guide that extends from the first guide toward an end of the second guide.