Air conditioner

Abstract

Disclosed is an air conditioner. The air conditioner of the present disclosure includes: a plurality of indoor units configured to be distributed and installed in a plurality of floors in a building; a controller configured to monitor and control the plurality of indoor units; and a wireless communication unit configured to transmit and receive data by the controller, the plurality of indoor units, and one outdoor unit by using a wireless communication method; wherein the wireless communication unit comprises a transmitter and a receiver using a Sub-GHz band frequency, wherein the transmitter includes: an optical orthogonal code generating unit configured to first cipher source data using an optical orthogonal code; and a narrow-band chaotic signal generating unit configured to secondarily cipher by using a chaotic signal, wherein the data is sequentially encrypted through the optical orthogonal code generating unit and the narrowband chaotic signal generating unit and then transmitted.

Dependencies are inferred from the claim text.