Vehicle HVAC Air Distribution Door for Airflow Stratification

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Solution Overview

Problem

Existing heating and air conditioning devices for vehicles lack effective stratification of air flow distribution to various outlets, limiting user control and efficiency.

Innovation Solution

The device incorporates a housing with rotatable doors that control air flow distribution between multiple inlets and outlets, allowing active adjustment of air flow conveyance to improve stratification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a single air distribution inlet is used in existing devices, then the structure is simple, but the air flow stratification to various outlets is ineffective

Engineering Contradiction:

Improveair flow stratificationVSAvoiddistribution inlet structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent divides the single air distribution inlet into multiple distribution inlets (first distribution inlet connected to air transmitting branch, second distribution inlet connected to air heating branch). This segmentation allows independent control of air flows from different sources, enabling effective stratification of air flow to various outlets while maintaining structural simplicity through the rotatable door mechanism.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If mixing means are used to distribute air flow between branches, then air flow distribution is achieved, but effective stratification to multiple outlets is not realized

Engineering Contradiction:

Improveair flow stratificationVSAvoiduser control

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent employs a rotatable door that can dynamically adjust between different positions (first position for cold air distribution, second position for hot air distribution, and intermediate positions for mixed distribution). This dynamic mechanism enables users to control air flow stratification in real-time, improving ease of operation while achieving effective stratification to multiple outlets.

Inventive Principle:

Principle #15Dynamics

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

Enhances the stratification of air flow distribution to vehicle outlets, providing improved user control and efficiency in air conditioning systems.

Implementation Method 1

a door rotatably mounted in the chamber to control the distribution of the air flow between the distribution inlets and the at least one distribution outlet

Methodology Applied

Scientific EffectFluid flow control through mechanical obstruction:

Data Source

PatentEP4470808B1Heating and/or air conditioning device for a motor vehicle

Publication Date: 2026.02.25 DENSO THERMAL SYST SPA

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AI summary

Heating and/or air conditioning device for a motor vehicle, comprising a mixing section and an air distribution means (50) interposed between the mixing section and a plurality of air outlets (38a, 38b, 38c) of the heating and/or air conditioning device. The air distribution means comprise a housing (51) arranged at a mixing zone (34) and a door (56) rotatably mounted in the circular chamber (51a) in order to control the distribution of the air flow between two distribution inlets (55a, 55b) and at least one distribution outlet (55c, 55d) defined by the housing (51).