An air-conditioning unit of the invention includes: a main body, which is formed with an air intake part and an air exhaust part; a filter, for purification of the inhaled air in the air intake part; a cleaning unit, which can be configured on the air intake part in a mobile mode in order to move along with the filter, and can clean the the filter;an inhalation pipeline, provided on the air intake part. The inhalation pipeline includes: a casing, formed with an opening; a connector, comunicated with the cleaning unit for connection, and perforating through the opening; sealing components, which block the opening and can be configured to move together with the connector; an internal pipeline, which is configured in the casing, and forms a suction action space between the sealing components. The air-conditioning unit of the invention has the advantage that it can minimize inhalation losses during cleaning the filter.