Jet fan with air inlet and outlet guide pipe

The utility model discloses a jet fan with an air inlet and outlet guide pipe. The jet fan comprises a fan body, the draught fan body comprises a cylindrical draught fan outer shell and a pair of cylindrical silencing outer shells fixed to the left end and the right end of the draught fan outer shell respectively. A fan motor is arranged in the fan outer shell; an impeller is fixed on an output shaft of the fan motor; the device is characterized by further comprising a support adjusting mechanism; the support adjusting mechanism comprises a support connecting plate at the upper part; the support connecting plate is fixed on the top wall of the tunnel; a vertical connecting plate is fixed to the center of the lower end face of the supporting connecting plate. The fan outer shell is fixed atthe lower end of the vertical connecting plate; the ends, away from each other, of the pair of silencing outer shells are spherically connected with air inlet and outlet guide pipes. The support adjusting mechanism comprises