New fan of bi -directional flow

The utility model discloses a new fan of bi -directional flow, be used for carrying outdoor fresh air and indoor transport to outdoor evacuation gas to indoor in the lump, and be used for handling theindoor gas that makes the return trip empty, it includes that fresh air and evacuation gas filter by first filter screen and second filter screen in proper order, fresh air and evacuation gas are crossed filter from the second and are got into full heat exchanger of graphite alkene and third filter screen in proper order, the indoor gas that makes the return trip empty gets into the full heat exchanger of the reentrant graphite alkene of second filter screen via this return air inlet and handles, indoor gas and outdoor fresh air and the evacuation gas of making the return trip empty all carries out abundant energy exchange in the full heat exchanger of graphite alkene, the full heat exchanger of graphite alkene is graphene modification water permeable membrane material producing's full heat exchanger, the membran