Patent ID: 7770403

Claim:
An air conditioning system having a plurality of indoor units, at least one outdoor unit, and a system controller for controlling said indoor units or outdoor unit, said system comprising: a leased communication line for connecting said at least one outdoor unit with said system controller; a leased communication means provided in said at least one outdoor unit and being connected with said leased communication line; a first power line supplying electric power for said at least one outdoor unit; second power lines supplying electric power for said indoor units; power line communication means provided in each of said indoor units and being connected with said second power lines; and bridges for connecting said leased communication line with said second power lines; wherein said indoor units are divided into plural groups in every one or more indoor units, said indoor units in the same group share the same second power line, said second power line is branched for each group having a blocking filter, and control information is exchanged mutually among said indoor units, said at least one outdoor unit and said system controller.