Patent ID: 8007553

Claim:
A ceiling type air conditioner, comprising: a filter housing in which a filter is settled; a brush assembly coupled to the filter housing to collect foreign matters filtered by the filter; a moving unit for moving the brush assembly along the filter housing; a suctioning unit for suctioning the foreign matters collected by the brush assembly; a position sensing unit provided on at least one side of the filter housing to sense the position of the brush assembly, wherein the position sensing unit comprises: a first signal unit for generating a first signal when the brush assembly reaches a first position on the filter housing; and a second signal unit for generating a second signal when the brush assembly reaches a second position on the filter housing; and a controlling unit for controlling an operation of both the moving unit and the suctioning unit based on the sensed position of the brush assembly, wherein the controlling unit receives the first signal and then controls the moving unit so that the brush assembly moves in an opposite direction, and wherein the controlling unit receives the second signal and then controls the moving unit so that the brush assembly stops for a first set time when a number of times the brush assembly reaches the second position is no less than a predetermined number of times.