Filterable inner wind path fan

The utility model relates to a filterable inner air path fan, which comprises a fan and an air duct, the fan is connected with a cooler inner air path through the air duct, the fan is externally connected with an air bellow, an air inlet pipe is arranged on the air bellow, a filter is arranged at the opening of the air inlet pipe, the air bellow is further connected with the air duct through a bypass pipe with a bypass valve, and the fan and the bypass valve are connected with a controller. Air is supplied to the inner air path of the cooling equipment through the air bellow, dust particles in the air can be effectively filtered after the air is firstly filtered through the filter, the air inlet amount of the fan is not affected, the cooling performance of the equipment is guaranteed, the air inlet amount is increased through the bypass pipeline by opening the bypass valve, and the cooling equipment with the high air inlet amount requirement is met. And the cooling performance of cooling equipment is improved