Patent ID: 8205466
Filing Date: 2012-06-26
Classification: F24F

Abstract:
1. An air conditioning system comprising: a first communication line; a second communication line; and an indoor unit coupled to an outdoor unit via at least one common power supply line, the indoor unit having at least one of a first communication circuit and a second communication circuit, the first communication circuit configured to communicate through the first communication line and the second communication line independent of the at least one common power supply line, and the second communication circuit configured to communicate through the at least one common power supply line and one of the first communication line and the second communication line, and the outdoor unit having a third communication circuit having a plurality of communication terminals coupled to the indoor unit and configured to communicate with at least one of the first communication circuit and the second communication circuit, and a switch configured to connect one of the plurality of communication terminals of the third communication circuit to the at least one common power supply line when the third communication circuit is connected to the second communication circuit and further configured to open a connection between the communication terminal of the third communication circuit and the at least one common power supply line when the third communication circuit is connected to the first communication circuit.