Refrigerant Charge Judgment Using Utilization Unit Data
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Solution Overview
Problem
The existing methods for judging the adequacy of refrigerant quantity in air conditioner refrigerant circuits are labor-intensive and prone to errors, particularly when dealing with various types of utilization units connected to a heat source unit, as they require manual input of complex information and are not highly accurate.
Innovation Solution
An air conditioner system that includes a refrigerant circuit, transmission lines, information obtaining means, operation controlling means, refrigerant quantity judging means, and condition setting means, which automatically obtains information from utilization units, sets conditions for refrigerant quantity judging operations, and calculates refrigerant quantity using relational expressions specific to each utilization unit model, thereby reducing labor and increasing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual input of utilization unit information is performed to judge refrigerant quantity, then judgment accuracy can be improved, but labor intensity increases
Solution Approach 1:
The utilization unit automatically transmits its own information (model, capacity, etc.) to the heat source unit via transmission line without requiring manual input. The heat source unit then uses this self-provided information to perform refrigerant quantity judgment, eliminating the need for external information input while maintaining accurate judgment.
2Measurement precision
If manual input of utilization unit information is performed to judge refrigerant quantity, then judgment accuracy can be improved, but operation complexity increases
Solution Approach 1:
The utilization unit automatically transmits its own information (model, capacity, etc.) to the heat source unit via transmission line without requiring manual input. The heat source unit then uses this self-provided information to perform refrigerant quantity judgment, eliminating the need for external information input while maintaining accurate judgment.
3Extent of automation
If automatic information transmission is implemented, then labor is reduced, but system complexity increases
Solution Approach 1:
A transmission line acts as an intermediary communication channel between the utilization unit and heat source unit. This allows automatic information transmission without requiring complex integrated systems, as the transmission line serves as a simple mediator that carries data between the two units.
4Measurement precision
If manual input of utilization unit information is performed, then refrigerant quantity can be judged, but error rate increases
Solution Approach 1:
The utilization unit automatically transmits its own information (model, capacity, etc.) to the heat source unit via transmission line without requiring manual input. The heat source unit then uses this self-provided information to perform refrigerant quantity judgment, eliminating the need for external information input while maintaining accurate judgment.
Data Source
AI summary
An air conditioner includes a refrigerant circuit configured to interconnect a heat source unit and a utilization unit, a transmission line that exchanges a signal between the heat source unit and the utilization unit, an information obtaining section, an operation controlling section capable of performing a refrigerant quantity judging operation, a refrigerant quantity judging section, and a condition setting section. The information obtaining section obtains information on the utilization unit connected to the heat source unit via the transmission line. The refrigerant quantity judging section judges the adequacy of the refrigerant quantity in the refrigerant circuit by using the operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit in the refrigerant quantity judging operation. The condition setting section sets a condition for the refrigerant quantity judging operation according to the information on the utilization unit obtained by the information obtaining section.