Multi-Filter Air Conditioner Service Timing by Dust Size Sensing
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Solution Overview
Problem
Conventional air conditioners lack the ability to determine and announce the optimum service time for each filter, especially when multiple filters are arranged in the airflow direction, leading to potential inefficiencies in air purification.
Innovation Solution
An air conditioner equipped with a dust amount sensor that measures dust of different particle sizes and a controller that outputs service signals for each filter based on accumulated dust values, along with an alarm device to prompt for maintenance, ensuring each filter is serviced optimally based on indoor air quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single filter service time announcement method is used for multiple filters, then the device complexity is reduced, but the measurement precision and service accuracy for each filter cannot be achieved
Solution Approach 1:
The dust amount sensor is divided into multiple detection units, each responsible for detecting dust in different particle size ranges. Each detection unit independently calculates service time for specific filters based on its detection results, enabling precise service time determination for each filter without requiring a complex centralized monitoring system.
Solution Approach 2:
Different detection units are assigned to detect different particle size ranges and are correlated with specific filters based on their filtration functions. This local specialization allows each filter's service time to be determined based on the dust characteristics most relevant to its function, improving measurement precision while keeping the system structure simple.
2Productivity
If filters are serviced based on uniform criteria, then the ease of operation is improved, but the productivity and air purification quality deteriorate due to unnecessary servicing
Solution Approach 1:
The system continuously monitors dust amounts in real-time and provides feedback to determine when each filter requires servicing. This feedback mechanism ensures filters are serviced based on actual contamination levels rather than uniform time intervals, maintaining high air purification efficiency while preventing unnecessary servicing operations.
Solution Approach 2:
The service time determination is made dynamic by correlating dust detection results with each filter's specific function and particle size range. This dynamic approach allows the system to adapt service timing to actual operating conditions, improving productivity by avoiding unnecessary servicing while maintaining operational simplicity through automated determination.
3Measurement precision
If dust detection for multiple particle sizes is performed separately, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The dust amount sensor is designed as a multi-functional device that can detect dust in multiple particle size ranges simultaneously using different detection units. Each unit is optimized for specific particle sizes but all units share the same sensor platform, achieving high measurement precision without proportionally increasing device complexity.
Solution Approach 2:
Multiple detection units for different particle size ranges are merged into a single integrated dust amount sensor system. This merging allows simultaneous detection of various dust sizes while sharing common components and processing circuits, achieving accurate multi-range measurement without the complexity of completely separate sensor systems.
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 solution allows for independent calculation of the optimum service time for each filter, preventing unnecessary servicing and maintaining the quality of indoor air by announcing the precise service time for each filter.
Implementation Method 1
The dust amount sensor may be configured to emit light into the hole, measure the amount of dust within the first particle size range based on a pattern of light scattered by the dust within the first particle size range, and measure the amount of dust within the second particle size range based on a pattern of light scattered by the dust within the second particle size range.
Data Source
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AI summary
The present invention comprises: a first filter, and a second filter positioned in the slipstream of the first filter in the airflow direction; a dust amount sensor positioned before the first filter in the airflow direction, having a hole part through which dust passes, and transmitting, per unit of time, each of a first total, which is the amount of dust in a first size range, and a second total, which is the amount of dust in a second size range smaller than the first size range, of the dust passing through the hole part; and a control unit for outputting the service signal of the first filter if the accumulated value of the first total transmitted from the dust amount sensor exceeds a first set value, and outputting the service signal of the second filter if the accumulated value of the second total transmitted from the dust amount sensor exceeds a second set value, wherein the optimum service time of each of the first filter and the second filter, which are capable of filtering dust of different sizes, can be independently calculated such that the unnecessary service of one of the first filter and the second filter can be blocked, and the optimum service time according to the indoor quality can be indicated.