State analyzer system and state analysis device
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Solution Overview
Problem
Existing air-conditioning apparatus diagnosis methods struggle to accurately identify the factor and degree of abnormality due to the complexity of refrigeration cycle charts, making it difficult for users to diagnose issues effectively.
Innovation Solution
A state analyzer system that includes a compressor, expansion unit, state detection unit, controller, specific state determination unit, normal region determination unit, and display unit, which analyzes refrigerant states using state and control data to display specific state information and normal regions on a p-h chart, allowing users to visually diagnose abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If refrigeration cycle charts are displayed on a p-h chart to analyze air-conditioning apparatus state, then the analysis capability is provided, but the complexity of diagnosis increases making it difficult for users to identify abnormality factors and degrees
Solution Approach 1:
The patent segments the continuous refrigeration cycle chart into discrete state spaces with specific parameters (superheat degree, subcooling degree, saturation state). By dividing the complex p-h chart into manageable state regions, the system maintains diagnostic accuracy while reducing user cognitive load. Each state space represents a specific refrigerant condition that can be independently analyzed.
Solution Approach 2:
The patent transforms the complex two-dimensional p-h chart analysis into multi-parameter state evaluation using superheat degree, subcooling degree, and saturation state as key parameters. This parameter transformation simplifies the diagnosis process by focusing on specific thermodynamic properties rather than requiring interpretation of the entire pressure-enthalpy relationship.
2Loss of information
If multiple factors affecting refrigeration cycle are reflected on the chart, then comprehensive analysis is achieved, but the ability to identify specific abnormality factors and degrees deteriorates
Solution Approach 1:
The patent applies local quality by assigning specific diagnostic meanings to different regions within the state space. Each state region (superheated, saturated, subcooled) has distinct diagnostic characteristics that help identify specific abnormality types. This localized interpretation allows comprehensive information to be organized into meaningful diagnostic categories rather than overwhelming the user with undifferentiated data.
Solution Approach 2:
The patent introduces state space as an intermediary between the raw refrigeration cycle data and the final diagnosis. The state space acts as a mediator that processes multiple influencing factors (pressure, temperature, refrigerant properties) and transforms them into interpretable diagnostic information about abnormality factors and degrees, bridging the gap between comprehensive data and precise identification.
Data Source
AI summary
A state analysis device and a state analyzer system include a specific state determination unit that determines specific state information representing a state of refrigerant at a specific position in a refrigeration circuit and a normal region determination unit that determines a normal region in a state space within which the specific state information is present when an air-conditioning apparatus operates under a normal state. The state analysis device and the state analyzer system allow a display to display the specific state information and the normal region.