Air purification device and method for controlling same
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Solution Overview
Problem
Existing air purifiers generate significant noise and reduce air delivery rate due to air passing through unnecessary filters, leading to degradation in purification capability.
Innovation Solution
An air purifier with multiple filters that can be selectively positioned in the air passage based on air quality sensors and user input, using a driving unit controlled by a processor to optimize filter usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air passes through all installed filters in maximum purification mode, then purification capability is improved, but noise is significantly generated
Solution Approach 1:
The patent implements dynamic filter selection where the air passage configuration changes based on real-time air quality conditions. The driving unit moves filters between different positions (first position in air passage, second position outside air passage) to dynamically adjust the purification system, allowing the device to operate in different modes (high purification vs. low noise) according to actual needs
2Reliability
If air passes through all installed filters, then comprehensive purification is achieved, but air delivery rate (CADR) is reduced
Solution Approach 1:
The system dynamically adjusts the number and type of filters in the air passage based on detected air quality. When pollution levels are low, fewer filters are positioned in the air passage, reducing resistance and maintaining high air delivery rate. When pollution levels are high, additional filters are moved into the air passage to enhance purification capability
Solution Approach 2:
Different types of filters (dust filter, deodorizing filter, harmful gas filter) are selectively positioned in the air passage based on the specific type of pollution detected. This ensures that only the necessary filters are active, optimizing both purification effectiveness and air delivery rate by avoiding unnecessary filtration resistance
3Reliability
If unnecessary filters are used in air passage, then all potential contaminants are addressed, but device complexity increases
Solution Approach 1:
The patent employs a driving unit that automatically moves filters between different positions based on air quality conditions, transforming a static complex multi-filter system into a dynamically simplified system. The processor controls this movement, enabling the device to adapt its configuration and reducing operational complexity by activating only necessary filters
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
Reduces noise and maintains high air delivery rate by ensuring only necessary filters are used, enhancing purification efficiency and reducing unnecessary filter usage.
Implementation Method 1
a sensor configured to obtain a sensing value to identify the air state, and the sensor includes at least one of a gas sensor, a dust sensor, and an environment sensor
Implementation Method 2
Based on the disposing of the first filter and the second filter in the air passage, inhaled air is filtered by the first filter and the air filtered by the first filter is filtered by the second filter
Data Source
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AI summary
An air purifier is provided. The air purifier includes a plurality of filters, a driving unit configured to individually move the plurality of filters, and a processor configured to control the driving unit so that at least one of the plurality of filters is disposed in an air passage in the air purifier according to an air state.