Dustproof air return system for central air conditioner

The utility model relates to a dustproof air return system for a central air conditioner. The device comprises a pipeline, the pipeline is in a big-end-down conical shape, the top of the pipeline is open and is fixed to an air return inlet of the central air conditioner through an upper fixing clamping piece, the bottom of the pipeline is open and is connected with an air return port through a lower fixing clamping piece, and the air return port is embedded in the suspended ceiling and is provided with a downward opening; and the central air conditioner is arranged below the wall top surface and is wrapped in the suspended ceiling. The dustproof air return system for the central air conditioner is convenient to use and good in dustproof effect, dust on a ceiling can be prevented from entering the central air conditioner, the service life of the central air conditioner is prolonged, and the maintenance cost of the central air conditioner is reduced. 本实用新型是一种中央空调用防尘式回风系统，包括管道，所述管道为上小下大的锥状，所述管道顶部开口且通过上固定卡件固定在所述中