| 摘要 |
An information transfer system for a refrigeration air-conditioning apparatus in which one or more heat-source units for the refrigerating/air conditioning apparatus, one first relay unit, and one or more second relay units are connected by refrigerant piping, and the second relay units and one or more indoor units are connected by water piping, wherein communications are performed discretely between a pair of the heat-source unit and the first relay unit, a pair of the first relay unit and the second relay units, and a pair of the second relay units and the indoor units through transmission lines respectively. |
