Patent ID: 9121624
Filing Date: 2015-09-01
Classification: F24F

Abstract:
1. An information transfer system for a refrigeration air-conditioning apparatus, comprising at least one heat-source unit that includes a heat-source unit controller; an outdoor-side heat exchanger, one first relay unit including a first relay controller and a gas-liquid separator through which a refrigerant passes from said heat-source unit, and at least one second relay unit including a second relay controller and a refrigerant-water heat exchanger through which the refrigerant passes from said first relay unit, which are connected by refrigerant piping, and at least one indoor unit, including an indoor-side heat exchanger and an indoor unit controller, connected to said second relay unit by water piping, wherein said indoor unit performs heat exchange between water, to which heat exchange is performed by said refrigerant-water heat exchanger, and an indoor air by said indoor-side heat exchanger, wherein communications are performed discretely between a pair comprising said heat-source unit controller and said first relay controller over a first signal transmission line, a pair comprising said first relay controller and said second relay controller over a second signal transmission line, and a pair comprising said second relay controller and said indoor unit controller over a third signal transmission line.