| 摘要 |
<p>An information transfer system for a refrigeration air-conditioning apparatus in which one or more heat-source units 1 for the refrigerating/air conditioning apparatus, one first relay unit 3a, and one or more second relay units 3b and 3c are connected by refrigerant piping, and the second relay units 3b and 3c and one or more indoor units 2a to 2d are connected by water piping, wherein communications are performed discretely between a pair of the heat-source unit 1 and the first relay unit 3a, a pair of the first relay unit 3a and the second relay units 3b and 3c, and a pair of the second relay units 3b and 3c and the indoor units 2a to 2d through transmission lines respectively.</p> |
