Air duct device and air handling apparatus

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Solution Overview

Problem

Existing air conditioning systems require separate installation of air ducts for temperature and humidity regulation and air purification, lacking an integrated solution for both functions.

Innovation Solution

An integrated air duct system with a first air duct for heat exchange and a second air duct for purification, where the air input end of the second duct passes by the output end of the first duct, allowing for heat exchange and air purification within a shared housing, reducing temperature fluctuations and noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate air duct systems are used for temperature regulation and air purification, then each system can be optimized independently, but the device complexity and installation requirements increase

Engineering Contradiction:
Improvesystem optimizationVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the air conditioner and ventilator into a single integrated unit that shares a common air duct system. The air duct device includes both a cooling air duct and a purification air duct that are merged into one structure, allowing both temperature regulation and air purification functions to be performed through a unified system rather than separate installations.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The integrated air duct device performs multiple functions simultaneously: it serves as both a cooling duct for the air conditioner and a purification duct for the ventilator. The shared air duct structure enables the system to handle both temperature control and air purification tasks through a single multi-functional component.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If separate air conditioner and ventilator installations are used, then each device can be independently optimized, but the installation space and cost increase

Engineering Contradiction:
Improveindependent optimizationVSAvoidinstallation space
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The patent merges the air conditioner and ventilator into a single integrated installation with a shared housing and common air duct system. This consolidation reduces the total installation space required compared to having two separate devices, while still allowing each function to be independently optimized through dedicated components within the integrated structure.

Inventive Principle:
Principle #5Merging (Combining)

3Temperature

If the air input end of the second air duct passes by the air output end of the first air duct, then heat exchange between ducts is improved, but the risk of air flow interference increases

Engineering Contradiction:
Improveheat exchange efficiencyVSAvoidair flow interference
Core Design Contradiction:
TemperatureVSObject-affected harmful factors

Solution Approach 1:

The patent divides the air duct system into separate segments: a cooling air duct and a purification air duct, each with dedicated input and output ends. The segmentation allows the ducts to pass by each other for heat exchange while maintaining independent air flow paths, thus preventing interference between the cooling and purification air streams.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies different structural characteristics to different parts of the air duct system. The section where the cooling and purification ducts pass by each other is designed with specific insulation and spatial arrangement to enable heat exchange, while other sections maintain separate and distinct air flow paths to prevent interference.

Inventive Principle:
Principle #3Local quality

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 integrated system minimizes indoor temperature fluctuations, reduces noise, and enhances user comfort by integrating temperature regulation and air purification functions, while potentially decreasing system size and cost.

Implementation Method 1

an air input end of the second air duct passes by an air output end of the first air duct

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

heat exchange and air purification within a shared housing

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

air input end of the second air duct passes by an air output end of the first air duct

Methodology Applied
Scientific EffectConvection: Convection

Data Source

PatentEP3892926B1Air duct device and air handling apparatus
Publication Date: 2026.03.04 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • EP3892926B1 patent drawingFigure 1~2
  • EP3892926B1 patent drawingFigure 3
  • EP3892926B1 patent drawingFigure 4

AI summary

An air duct device and an air handling apparatus are provided. The air duct device can include a housing, a first air duct, and a second air duct. The first air duct is arranged in the housing and has an air input end and an air output end. The second air duct is arranged in the housing and has an air input end and an air output end. The air input end of the second air duct passes by the air output end of the first air duct.