Air Conditioner Filter Net Sweeping Assembly for Self-Cleaning Dust Removal

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Solution Overview

Problem

Existing air conditioner filtering net cleaning methods are inefficient, requiring frequent manual disassembly and cleaning, leading to increased labor, noise, and suboptimal dust removal, especially with prior self-cleaning devices that suffer from high costs, machining difficulties, and poor debusting effectiveness.

Innovation Solution

A self-cleaning device for air conditioner filtering nets that includes a sweeping assembly with a brush, drive motor, transmission mechanism, rack group, dust collecting box, and dust exchanging device, allowing the brush to slide up and down along the rack group to clean dust, which is then collected in the dust collecting box, utilizing a wool roll and soft baffle for effective dust capture and containment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual cleaning method is used, then dust can be removed from filtering net, but users need to frequently disassemble, wash and maintain the filtering net, which wastes time and labor

Engineering Contradiction:
Improvecleaning efficiencyVSAvoidmaintenance time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent implements an automatic cleaning system where the air conditioner cleans its own filtering net without external intervention. The cleaning mechanism includes a brush assembly that rotates to brush the filtering net surface, combined with a water spray system to rinse away dust, eliminating the need for manual disassembly and cleaning by users

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system performs preliminary cleaning actions during the air conditioner's normal operation or at scheduled intervals before dust accumulation becomes problematic. The control unit activates the brush and water spray mechanisms to prevent dust buildup, thereby maintaining filtering efficiency without requiring frequent manual maintenance

Inventive Principle:
Principle #10Preliminary action

2Productivity

If dust absorption strip is used with suction device, then suction effect can be maintained, but the structure requires high machining precision and is difficult to process

Engineering Contradiction:
Improvedust removal effectivenessVSAvoidprocessing difficulty
Core Design Contradiction:
ProductivityVSEase of manufacture

Solution Approach 1:

The patent extracts the complex dust absorption strip structure and replaces it with a simpler brush assembly that rotates against the filtering net. This brush mechanism, driven by a motor and transmitted through gears, achieves dust removal through mechanical brushing combined with water spray, eliminating the need for precision-machined dust absorption strips with suction holes

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs a water spray system that uses consumable water to rinse dust away, replacing the need for complex, precision-machined dust absorption components. The brush assembly and water spray mechanism are simpler, more economical components that can be easily manufactured and replaced if needed

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Productivity

If filtering net is rotated for dust absorption, then dust can be removed, but large power motor is required which produces larger noise

Engineering Contradiction:
Improvedust absorption capabilityVSAvoidnoise
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the dust removal function into two separate components: a brush assembly for mechanical dust dislodgment and a water spray system for dust removal. This eliminates the need for a large power motor required for rotating the entire filtering net, as the brush is driven by a smaller motor through a gear transmission system, significantly reducing noise levels

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces water spray as an intermediary medium to facilitate dust removal. Instead of relying solely on mechanical rotation powered by a large motor, the water spray assists in loosening and removing dust particles, allowing the use of a smaller, quieter motor for the brush assembly while maintaining effective dust absorption capability

Inventive Principle:
Principle #24Intermediary (Mediator)

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 device enables efficient, noise-reduced, and labor-saving cleaning of air conditioner filtering nets, ensuring continuous air quality and reduced maintenance time, with effective dust removal and prevention of dust re-entry into the air stream.

Implementation Method 1

a sweeping assembly (4) with a brush

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 2

the drive motor (5) connecting with the transmission mechanism (6) drives the sweeping assembly (4) sliding up and down

Methodology Applied
Scientific EffectMechanical Force: Mechanical Force

Implementation Method 3

utilizing a wool roll and soft baffle for effective dust capture and containment

Methodology Applied
Scientific EffectPhysical Containment: Physical Containment

Implementation Method 4

a dust exchanging device (9) disposed between the dust collecting box (8) and the filtering net (3)

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Implementation Method 5

dust collecting box (8) disposed under the filtering net (3) for collecting dust

Methodology Applied
Scientific EffectGravitation: Gravitation

Data Source

PatentUS8118899B2Self-cleaning device of filtering net of air conditioner
Publication Date: 2012.02.21 QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
  • US8118899B2 patent drawing
  • US8118899B2 patent drawing
  • US8118899B2 patent drawing

AI summary

A self-cleaning device of a filtering net of air conditioner is installed on a filtering frame in an air inlet of a dust spiral case of a package air conditioner and is disposed outside the filtering net. A filtering net guide rail with slots is installed on an upper frame and a lower frame. The filtering net is fixed on the filtering net frame by the slots of guide rails. The cleaning device of the filtering net includes a sweeping assembly with a brush, a drive motor fixed on the sweeping assembly, a transmission mechanism connected to the drive motor, a rack group installed on the left and right side of the filtering net, a dust collecting box installed under the filtering net for collecting dust, and a dust exchanging device is disposed between the dust collecting box and the filtering net. The drive motor connected with the transmission mechanism drives the sweeping assembly sliding up and down attached the filtering net along the rack group, thus dust is cleaned by the brush, then dust is put into the dust collecting box through the dust exchanging device. The device is easily loaded and unloaded, and used with less time and labor, the filtering net can be cleaned any time or on time.