Patent ID: 8666684
Filing Date: 2014-03-04
Classification: F24F,F25B

Abstract:
1. An air conditioning system, comprising: a plurality of indoor devices; one or more outdoor devices to drive the plurality of indoor devices, the one or more outdoor devices being coupled to the plurality of indoor devices through at least one refrigerant pipe that includes one or more branch points; a length detector to detect a length of the at least one refrigerant pipe based on a signal received by at least one of the one or more outdoor devices or the plurality of indoor devices; and a calculator to calculate an amount of filling refrigerant based on capacities of the plurality of indoor devices and the one or more outdoor devices and the length of the at least one refrigerant pipe, wherein the length of the at least one pipe is detected using the following equation: where α is impedance per unitary length and Zpipe is calculated using the following equation: where I −1 is a current and V is a voltage of the signal.