Control system and control method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing control systems for air conditioning filters struggle to accurately determine the capture efficiency of microscopic particles in actual environments, as they rely on reference standards that do not account for variations in particle types and environments, leading to inaccurate assessments of filter performance and maintenance needs.
Innovation Solution
A control system that corrects the first reference capture efficiency for first microscopic particles to a second reference capture efficiency for second microscopic particles, using correlation data to determine the actual capture efficiency and adjust air blowing volume or notify for filter replacement, thereby ensuring compliance with standards like ASHRAE 52.2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the control system uses a first reference capture efficiency for first microscopic particles according to reference standards, then the filter performance can be evaluated against standardized criteria, but the capture efficiency assessment becomes inaccurate when applied to second microscopic particles in actual environments due to particle type and environmental variations
Solution Approach 1:
The system changes the parameters used for capture efficiency assessment by switching between first microscopic particles (for standardized reference) and second microscopic particles (for actual environmental conditions). The control unit adjusts evaluation parameters based on whether standardized compliance checking or actual performance monitoring is needed, allowing accurate assessment for both reference standards and real-world conditions.
Solution Approach 2:
The patent segments the capture efficiency assessment into two distinct evaluation modes: one for first microscopic particles according to reference standards (for compliance verification) and another for second microscopic particles in actual environments (for performance monitoring). This segmentation allows each particle type to be evaluated with appropriate criteria, resolving the contradiction between standardized assessment and environmental adaptability.
2Reliability
If the system maintains a fixed reference capture efficiency value, then compliance with standards like ASHRAE 52.2 can be verified, but the system cannot accurately determine maintenance needs under varying actual environmental conditions
Solution Approach 1:
The system dynamically switches between fixed reference values (for standard compliance) and actual measured values (for performance monitoring). The control unit determines whether to use the fixed first reference capture efficiency or the dynamically measured second capture efficiency based on the evaluation purpose, allowing both reliability for compliance and precision for actual performance assessment.
Solution Approach 2:
The control unit acts as an intermediary that mediates between standardized reference values and actual environmental measurements. It selects which capture efficiency value to use based on whether standard compliance verification or actual performance assessment is required, ensuring both regulatory compliance and accurate maintenance timing.
3Measurement precision
If the control system frequently monitors capture efficiency using actual environmental particles, then accurate determination of filter degradation can be achieved, but the system complexity and measurement requirements increase
Solution Approach 1:
The system achieves multi-functionality by using the same capture efficiency measurement apparatus for both first microscopic particles (standardized reference) and second microscopic particles (actual environmental monitoring). This universal measurement system reduces overall device complexity while enabling both types of assessment through a single integrated control unit.
Data Source
AI summary
A control system includes a storage unit, an acquisition unit, a determination unit, a control unit, and a blowing unit. The storage unit stores a second reference capture efficiency obtained by correcting a first reference capture efficiency for first microscopic particles to a reference capture efficiency for second microscopic particles. The acquisition unit is configured to acquire a capture efficiency of a filter for the second microscopic particles. The determination unit is configured to perform a determination process of determining whether the capture efficiency acquired by the acquisition unit is smaller than the second reference capture efficiency. The control unit is configured to control operation of the blowing unit based on a result of the determination process. The first microscopic particles are used to measure a capture efficiency of the filter in a reference standard, and the second microscopic particles are present around the filter installed in an actual environment.