Air Filter Brush Cleaning in Indoor AC Units Under Dust Buildup
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Solution Overview
Problem
The dust removing performance of rotating brushes in air conditioner indoor units degrades rapidly as the amount of trapped dust increases, leading to a failure in scraping dust when the maximum amount is reached.
Innovation Solution
An indoor air conditioner unit with a brush member that scrapes dust from the air filter and a cleaning brush member to remove dust from the brush, allowing for intermittent contact and movement to maintain dust removal efficiency, and adjustable movement based on dust accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotating brush continuously scrapes dust from the air filter, then the dust removal function is maintained, but the brush member becomes saturated with dust and loses scraping capability
Solution Approach 1:
The patent introduces a second brush member as an intermediary cleaning element that removes dust from the first brush member. This mediator brush transfers the cleaning function, allowing the primary dust-removal brush to be periodically regenerated without manual intervention, thus maintaining its dust removal capability throughout operation.
Solution Approach 2:
The system implements self-service by having the brush member clean itself through the second brush. The relative movement between brushes enables automatic dust removal from the scraping brush, eliminating the need for external maintenance and ensuring continuous operational reliability.
2Productivity
If the brush member contacts the air filter continuously, then dust is removed from the entire filter, but the brush becomes overloaded and performance degrades
Solution Approach 1:
The patent implements periodic action by alternating between dust scraping mode (brush contacts air filter) and brush cleaning mode (brush contacts second brush). This periodic switching prevents brush saturation by regularly resetting its dust capacity, maintaining high scraping efficiency throughout the operating cycle.
Solution Approach 2:
The second brush performs preliminary cleaning action on the first brush before it becomes completely saturated. By continuously or periodically removing accumulated dust from the scraping brush, the system prevents performance degradation and maintains optimal scraping capability throughout operation.
3Device complexity
If a single brush member is used for dust removal, then the structure is simple, but the brush cannot maintain performance when dust accumulates
Solution Approach 1:
The second brush member serves multiple functions: it cleans the first brush, transfers dust to a collection container, and can be adjusted to control the cleaning frequency and intensity. This multi-functional element adds minimal complexity while significantly improving system reliability and performance maintenance.
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 maintains high dust removal performance by alternately scraping and cleaning the brush member, preventing degradation and ensuring efficient dust removal from the air filter, even in high dust environments.
Implementation Method 1
a brush member (51) configured to come into contact with the air filter (30) to scrape dust from the air filter (30)
Implementation Method 2
a cleaning brush member (52) configured to come into contact with the brush member (51) to remove dust from the brush member (51)
Data Source
AI summary
An air filter (30) intermittently rotates by a predetermined rotation angle at each time, while being in contact with a bristle portion (51b) of a rotating brush (51). Accordingly, dust on the air filter (30) is scraped by the bristle portion (51b). The brush member (51) rotates about an axial center of a shaft (51a) at each stop of the intermittent rotation of the air filter (30), to come into contact with a cleaning brush member (52). According, dust on the brush member (51) is removed by the cleaning brush member (52).