An embodiment of the invention provides an air treatment device. The air treatment device comprises an air purifying unit configured to purify air a scent dispenser configured to dispense scent an air detector, configured to detect the purified air and provide an output signal and a processor configured to receive the output signal from the air detector and control the operation speed of the air purifying unit and the dispensing flow of scent dispensed by the scent dispenser, based on the output signal, wherein the dispensing flow of scent dispensed by the scent dispenser is decreased with the increase of the operating speed of the air purifying unit. Another embodiment of the invention provides a method of controlling a scent dispenser and an air purifying unit of an air treatment device, wherein the air treatment device further includes an air detector and a processor. The method comprises the steps of purifying air by using the air purifying unit detecting the purified air by using the air detector controlling, by using the processor, the operating speed of the air purifying unit and the dispensing flow of scent dispensed by the scent dispenser, based on the detection result, wherein the dispensing flow of scent dispensed by the scent dispenser is decreased with the increase of the operating speed of the air purifying unit.Un mode de réalisation de linvention porte sur un dispositif de traitement dair. Le dispositif de traitement dair comprend une unité de purification dair configurée de façon à purifier de lair un distributeur de parfum configuré de façon à distribuer un parfum un détecteur dair, configuré de façon à détecter lair purifié et à fournir un signal de sortie et un processeur configuré de façon à recevoir le signal de sortie à partir du détecteur dair et à commander la vitesse de fonctionnement de lunité de purification dair et lécoulement de distribution de parfum distribué par le distributeur de parfum, sur la base du signal de sortie, lécouleme
