Patent ID: 9726408
Date: 2017-08-08
CPC Classifications: F25B

Claim:
1. An air conditioner, comprising: a compressor to compress a refrigerant; at least one oil sensor provided in the compressor to detect a level of oil stored in the compressor; an oil separator to separate the oil from the refrigerant discharged from the compressor; a first collection tube to collect the oil separated by the oil separator into the compressor; a second collection tube provided at a height different from a height of the first collection tube; an oil valve provided in the second collection tube; and a controller to control the oil valve based on the level of the oil detected by the at least one oil sensor, wherein the oil valve includes an electronic expansion valve, an opening degree of which is adjustable, wherein the second collection tube connects the oil separator to the compressor, wherein a first side of the first collection tube is connected to the oil separator and a second side is connected to the second collection tube, and wherein a portion of the second collection tube to which the first collection tube is connected is provided higher than the first collection tube.