Seat ventilation blower and seat ventilation system having the same

A seat ventilation blower comprising:

• a first housing;
• a second housing coupled and assembled to the first housing;
• an impeller inserted inside the first housing or the second housing, the impeller configured to rotate;
• a circuit board body having a motor assembly coupled to the impeller to rotate the impeller, wherein the circuit board body is configured to control operation of the motor assembly and is installed in an interior space formed when the first and second housings are coupled and assembled together;
• wherein an exothermic element mounted on the circuit board body is arranged between an inner side of an edge of the first housing or the second housing and a position out of a range of blades of the impeller to be cooled by air flow generated from the rotation of the impeller;
• a cover formed to protrude from a lateral side of the first housing;
• and
• a recessed channel formed to protrude from a lateral side of the second housing;
• wherein a terminal portion of the circuit body is positioned within the recessed channel;
• and
• wherein the cover covers a rear portion of the terminal portion and a top portion of the terminal portion such that foreign matter is prevented from flowing into the impeller through the recessed channel.