Ventilation system

The utility model relates to a ventilation system. Ventilation system's system and equipment have the fan and the annular clearance that is located the fan low reaches, and this ventilation system's system and equipment produce has the air column that hangs down the rate of supplying gas. This ventilation system can have the filter that removes at the upper reaches that are located the fan. Ventilation system can be to user or the high local filtered air of place output. 本实用新型涉及种通风系统。通风系统的系统和设备具有风扇和位于风扇下游的环状的间隙，该通风系统的系统和设备产生具有低送气率的空气柱。该通风系统可以具有位于风扇的上游的可移除的过滤器。通风系统能够向使用者或地点输出高的局部过滤的空气。