Air conditioner

An air conditioner, comprising:

• an indoor unit;
• and
• a remote controller connected to the indoor unit through two lines to receive power from the indoor unit and perform communication with the indoor unit,
• wherein the indoor unit comprises a first modulation switching element to modulate power through the two lines according to a communication signal that is transmitted to the remote controller, a first demodulation switching element that is driven according to a communication signal transmitted from the remote controller through the two lines, and a first distribution resistance element to demodulate the communication signal transmitted from the remote controller through the two lines,
• wherein the remote controller comprises a second modulation switching element to modulate power through the two lines according to a communication signal that is transmitted to the indoor unit, a second demodulation switching element that is driven according to a modulated power through the two lines transmitted from the indoor unit, and a second distribution resistance element to demodulate the modulated power transmitted from the indoor unit through the two lines to obtain a communication signal, and
• wherein the remote controller further comprises a power unit that is charged with the modulated power provided from the indoor unit through the two lines,
• wherein the indoor unit further comprises a power terminal to supply the power, and a first modulation resistance element connected to the power terminal and the first modulation switching element, the first modulation resistance element reducing a level of power provided from the power terminal when the first modulation switching element is turned off.