AN AIR CONDITIONING SYSTEM AND A METHOD FOR CONTROLLING THE SAME

摘要

The present invention relates to an air conditioning device and a controlling method thereof. An air conditioning device according to an embodiment of the present invention includes: an outdoor unit with a compressor and an evaporator; an outdoor temperature sensor installed in the outdoor unit and sensing an outdoor temperature; an outdoor humidity recognizing unit installed in the outdoor unit and recognizing outdoor humidity information; a low-pressure sensor sensing an evaporative pressure of the evaporator; and a control unit controlling the operation of the compressor based on information on a dew point recognized by the outdoor temperature sensor and the outdoor humidity sensor and the information on the evaporative pressure recognized by the low-pressure sensor. The control unit varies a driving frequency of the compressor with whether the evaporative pressure is equal to or higher than a reference low pressure, thereby preventing the evaporator from being frosted. The purpose of the present invention is to provide an air conditioning device capable of preventing frosts and providing improved heating performance and the controlling method of the air conditioning device.