Turbo Chiller Diagnostic Control With On-Device Data Compression
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Solution Overview
Problem
Chiller diagnosis requires extensive operation data storage, but existing control devices have limited storage capacity, restricting data collection and diagnosis, especially in systems without remote monitoring devices.
Innovation Solution
A chiller control device with storage means, compression means, and state evaluation means that compresses operation data over time based on specific conditions, allowing for data size reduction without increasing storage capacity, enabling on-site diagnosis without remote monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If operation data is accumulated in the storage means over time, then the data size increases and diagnosis accuracy improves, but the storage capacity of the storage means is exceeded
Solution Approach 1:
The patent extracts only the essential diagnostic information from the operation data through compression processing. Instead of storing all raw operation data, the system extracts key parameters and diagnostic results that are sufficient for chiller diagnosis, thereby reducing storage requirements while maintaining diagnostic accuracy.
Solution Approach 2:
The patent changes the parameters of the stored data by compressing the operation data into a more compact format. The compression means transforms the original operation data into compressed data that occupies less storage space but retains the essential diagnostic information needed for evaluating chiller performance and detecting abnormalities.
2Measurement precision
If the storage capacity of the storage medium is increased to store more operation data, then diagnosis accuracy improves, but the cost increases
Solution Approach 1:
The patent extracts only the necessary diagnostic information from the operation data, storing only what is essential for accurate chiller diagnosis. This extraction approach allows the system to maintain high diagnosis accuracy without requiring large storage capacities, thereby avoiding the increased cost associated with larger storage media.
Solution Approach 2:
The patent employs a cost-effective data compression approach that allows the use of smaller, cheaper storage media. By compressing the operation data, the system can achieve the same diagnostic capability with less storage capacity, effectively using a 'cheaper' storage solution that would otherwise be insufficient for storing all raw operation data.
3Adaptability or versatility
If operation data is collected via communication line for remote diagnosis, then diagnosis capability is provided, but the communication data amount is limited and diagnosis may be performed by only limited operation data
Solution Approach 1:
The patent extracts and stores essential diagnostic information locally in the storage means, eliminating the need to transmit all operation data via communication lines. The compression means ensures that only the most critical diagnostic data is stored, providing complete diagnosis capability without relying on limited communication bandwidth.
Solution Approach 2:
The chiller control device performs self-diagnosis by storing and processing operation data locally without requiring external remote monitoring devices. The control device uses its own storage means and compression means to maintain and analyze operation data, enabling independent diagnostic functionality that does not depend on external communication infrastructure.
4Duration of action of stationary object
If the storage capacity of the storage medium is increased to store compressed operation data, then long-term data storage is enabled, but the cost increases
Solution Approach 1:
The patent extracts only the essential diagnostic parameters from the operation data and stores these extracted elements in the storage means. This extraction process enables long-term storage of diagnostic information without requiring proportionally large storage capacity, as only the critical data elements are retained rather than the complete raw dataset.
Solution Approach 2:
The compression means transforms the operation data into a compressed format that extends the storage period achievable with a given storage capacity. By changing the data parameters through compression, the system can store data for longer periods without increasing storage capacity or cost, as the compressed data occupies less space over time.
Data Source
AI summary
This chiller control device (74) is provided with: a storage unit (18) which stores operation data detected at each site in a turbo chiller; a compression unit (34) which, when the size of the operation data accumulated over time in the storage unit (18) becomes too large, converts the operation data each time a condition depending on the type of operation data is met, thereby compressing the data size; and a diagnostic unit (36) which evaluates the state of the turbo chiller on the basis of the operation data converted by the compression unit (34). By this means, the state of the chiller can be diagnosed without increasing the storage capacity of the storage medium that stores operation data of the turbo chiller.