Indoor Unit Address Setting via Serial Number Retry Logic
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Solution Overview
Problem
Conventional air conditioners face prolonged address setting times and failure due to signal disturbances like noise or ringing during the address setting process, leading to repeated retries and potential inability to complete address setting when disturbances are continuous.
Innovation Solution
The air conditioner employs an identification number detection portion that simultaneously transmits detection commands to indoor units in a predetermined order, with the ability to repeat commands and change detection command recognition methods to improve signal resilience, allowing for secure and efficient address setting by starting over from the immediately preceding digit in case of failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the address setting starts over by returning to the initial digit when reception failure occurs, then the address setting can be retried, but the time required for address setting increases significantly
Solution Approach 1:
The system records the digit position where reception failure occurs and uses this information to resume address setting from that specific position in retry operations, rather than starting from the initial digit. This preliminary recording of failure position enables targeted retries that skip already-successful digits, significantly reducing the time required for address setting while maintaining reliability.
2Reliability
If the address setting starts over from the initial digit when signal disturbance occurs, then the address setting can be retried, but the address setting cannot be completed when signal disturbance is continuous
Solution Approach 1:
The system records the digit position where reception failure occurs and uses this information to resume address setting from that specific position in retry operations, rather than starting from the initial digit. This preliminary recording of failure position enables targeted retries that skip already-successful digits, significantly reducing the time required for address setting while maintaining reliability.
3Device complexity
If detection commands are transmitted sequentially to indoor units, then the system can maintain simple control logic, but the address setting process becomes time-consuming
Solution Approach 1:
The system transmits multiple detection commands simultaneously to different indoor units rather than sequentially. By changing the parameter from sequential transmission to parallel transmission and using the recorded failure digit position to determine which commands to send, the system reduces address setting time while keeping control logic manageable through the use of pre-recorded failure position data.
Data Source
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AI summary
The present invention provides an air conditioner which shortens a time necessary for address setting and more securely performs the address setting. A serial number detection portion (11a) simultaneously transmits a detection command for requesting a first digit of a serial number to plurality of indoor units (21 to 24), and the serial number detection portion (11a) simultaneously transmits a detection command for requesting a second digit immediately preceding the first digit to the indoor units (21 to 24) when a response to the detection command is absent. That is, the address setting is performed again from the immediately preceding digit without returning to an initial digit of the serial number, so that the time necessary for the address setting can be shortened. When the address setting is performed again from the immediately preceding digit, the address setting can be performed more securely by changing a method of recognizing the detection command in the indoor units (21 to 24).