A blower, comprising: a blower body , having accommodated therein a fan and a drive unit, a rotation shaft of the fan defining a longitudinal axis, and the blower body defining an air inlet; a blow pipe , attached to the blower body and extending along the longitudinal axis, the blow pipe defining an air outlet; a control unit, for controlling operation of the drive unit, wherein the drive unit comprises a motor and the control unit comprises a control circuit board located at an end of the motor ; preferably, in an airflow direction, one of the control circuit board and the fan is located downstream of the motor while the other is located upstream of the motor ; wherein the blower defines an airflow path extending from the air inlet to the air outlet, the control unit being at least partially located in the airflow path, such that when the blower is operating, at least a portion of an airflow entering the air inlet cools the control unit and is then discharged through the air outlet; wherein the blower body comprises a casing in which the fan , motor and control circuit board are located, and wherein the casing comprises a hollow tapered flow-guiding body , the tapered flow-guiding body having an opening formed in a surface and/or an extremity of the tapered flow-guiding body ; wherein the casing comprises an outer ring and an inner ring , the tapered flow-guiding body being connected to the inner ring , and the control circuit board being located in a space defined by the tapered flow-guiding body and the inner ring ; characterized in that the tapered flow-guiding body further comprises a wing part , the wing part having an inner wall , an outer wall located at a radially outer side of the inner wall , and a connecting part which connects the inner wall to the outer wall ; and an inner ring slot and an outer ring slot which mate with the inner wall and the outer wall are formed in the inner ring and the outer ring of the casing respectively. a blower body , having accommodated therein a fan and a drive unit, a rotation shaft of the fan defining a longitudinal axis, and the blower body defining an air inlet; a blow pipe , attached to the blower body and extending along the longitudinal axis, the blow pipe defining an air outlet; a control unit, for controlling operation of the drive unit, wherein the drive unit comprises a motor and the control unit comprises a control circuit board located at an end of the motor ; preferably, in an airflow direction, one of the control circuit board and the fan is located downstream of the motor while the other is located upstream of the motor ; wherein the blower defines an airflow path extending from the air inlet to the air outlet, the control unit being at least partially located in the airflow path, such that when the blower is operating, at least a portion of an airflow entering the air inlet cools the control unit and is then discharged through the air outlet; wherein the blower body comprises a casing in which the fan , motor and control circuit board are located, and wherein the casing comprises a hollow tapered flow-guiding body , the tapered flow-guiding body having an opening formed in a surface and/or an extremity of the tapered flow-guiding body ; wherein the casing comprises an outer ring and an inner ring , the tapered flow-guiding body being connected to the inner ring , and the control circuit board being located in a space defined by the tapered flow-guiding body and the inner ring ; characterized in that the tapered flow-guiding body further comprises a wing part , the wing part having an inner wall , an outer wall located at a radially outer side of the inner wall , and a connecting part which connects the inner wall to the outer wall ; and an inner ring slot and an outer ring slot which mate with the inner wall and the outer wall are formed in the inner ring and the outer ring of the casing respectively. <EOS>