Patent ID: 8204627

Claim:
An air conditioner, comprising: a discharge driving unit for discharging an air-conditioned air; a sensor module for rotating and scanning predetermined areas and outputting data for radiation heats of heat sources; and a control unit for calculating observed change-amount signals based on the outputted data and stored old data, acquiring human body information by converting each of the observed change-amount signals into energy levels, and controlling the discharge driving unit, wherein the control unit comprises a signal conversion unit for calculating the observed change-amount signals by smoothing the data, the old data, and a moving average of the sensor module, and outputting the observed change-amount signals each including first and second sine signals; a signal analysis unit for acquiring the human body information by dividing each of the observed change-amount signals into the energy levels, determining that, if one of the first and second sine signals is placed between a first reference level and a second reference level of the energy levels, the acquired human body information is the human body, calculating the position information of the human body, and determining that the acquired human body information is a human body mistake factor when one of the first and second sine signals is higher than the second reference level; and wherein the control unit controls the discharge driving unit so that a direction of a wind and a velocity of the wind of the air-conditioned air are controlled according to the human body information, wherein the first and second reference levels vary depending on an indoor temperature.