Patent ID: 6625996
Filing Date: 2003-09-30
Classification: F24F

Abstract:
The communication control system as claimed in claim for an air conditioner including at least one outdoor unit, plural indoor units and control equipment such as a remote controller, etc. which are connected to one another through a communication line to mutually carry out data communication through said communication line, characterized in that at least two indoor units of said plural indoor units are equipped with power supply means, and non-polarized and bi-directional data communication is carried out between said plural indoor units and said control equipment while said power supply means of any one of said at least two indoor units supplies a power source voltage of a main power source to said communication line to said control equipment,wherein said power supply means includes a voltage detecting unit for detecting the power source voltage on said communication line, and a logical unit for judging on the basis of the detection result of said voltage detecting unit whether there is another power supply source which supplies the power source voltage onto said communication line and setting itself to function as a power supply source if it is judged that no other power supply source exists.