Air purification device and air purification system

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Solution Overview

Problem

Conventional air purification devices have limited purification ranges and require manual relocation to cover larger spaces, causing inconvenience.

Innovation Solution

An air purification device equipped with a movement portion to autonomously or remotely navigate to target regions, a purification portion to filter pollutants, and a monitoring portion to identify areas needing purification, along with a heating mechanism to accelerate pollutant release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the air purification device is stationary, then the device structure is simple, but the purification range is limited

Engineering Contradiction:
Improvepurification rangeVSAvoiddevice structure
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The patent applies the dynamics principle by transforming the stationary air purifier into a mobile robot with autonomous movement capabilities. The device uses drive wheels, a control unit, and sensors to dynamically navigate through the environment, allowing a single device to cover a much larger purification area compared to a stationary unit. This resolves the contradiction by making the device structure dynamic rather than static.

Inventive Principle:
Principle #15Dynamics

2Area of stationary object

If the air purification device is manually relocated, then the purification range can be expanded, but user convenience deteriorates

Engineering Contradiction:
Improvepurification rangeVSAvoiduser convenience
Core Design Contradiction:
Area of stationary objectVSEase of operation

Solution Approach 1:

The patent implements self-service by equipping the air purifier with autonomous navigation capabilities. The control unit automatically determines movement paths, the robot navigates to target regions, and the device performs purification without requiring user intervention for relocation. This eliminates the need for manual movement while expanding the purification range, thereby improving user convenience.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces the manual mechanical relocation system with an automated control system. Instead of users physically moving the device, the invention uses electronic control units, sensors, and autonomous navigation algorithms to automatically position the device in target regions, substituting human mechanical action with an automated electromechanical system.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If the air purification device autonomously moves, then the purification range is expanded and user convenience is improved, but the device complexity increases

Engineering Contradiction:
Improveuser convenienceVSAvoiddevice structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a mobile robot platform that integrates multiple functions: autonomous navigation, air quality monitoring, and air purification. By combining these functions into a single multi-functional device, the patent reduces the need for separate systems while achieving expanded purification coverage and improved user convenience, thereby managing device complexity through functional integration.

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

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

Expands purification range, enhances user convenience by eliminating the need for manual relocation, and improves air quality across multiple regions efficiently.

Implementation Method 1

a heating portion configured to increase environmental temperature around the air purification device to accelerate release of harmful substances from the environment

Methodology Applied
Scientific EffectThermal energy: Heating

Implementation Method 2

the monitoring portion includes an infrared sensor configured to measure the air quality

Methodology Applied
Scientific EffectInfrared radiation detection: Infrared Radiation

Data Source

PatentEP3434986B1Air purification device and air purification system
Publication Date: 2025.12.31 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • EP3434986B1 patent drawingFigure 1
  • EP3434986B1 patent drawingFigure 2A
  • EP3434986B1 patent drawingFigure 2B

AI summary

An air purification device (10) includes a movement portion (12) configured to move the air purification device (10) to a target region; and a purification portion (11) configured to purify air in the target region to improve air quality of the target region.