Inflator having an enhanced cooling effect on a motor thereof

In an inflator including a box composed of a cover and a base, and a compressor unit installed in the box, wherein the cover has a front wall and a rear wall, and the base has a front wall aligned with the front wall of the cover, and a rear wall aligned with the rear wall of the cover, the front walls of the cover and the base defining multiple first slits to serve as an air entrance port, the rear walls of the cover and the base defining multiple second slits to serve as an air exit port, the compressor unit including a motor having a rotating shaft, one end of which is provided with a cooling fan for drawing outside air into the interior of the box via the first slits, the motor defining two opposite openings on its housing;

• wherein the improvements comprises:
• the cover is provided with an upper airflow-guiding member, and the base is provided with a lower airflow-guiding member, the upper and lower air flow-guiding members respectively contacting the housing of the motor at a location slightly behind the two opposite openings for supporting the motor's housing and guiding the airflow induced by the cooling fan to enter the motor's housing via the two opposite openings, so that heat is not easy to accumulate in the motor,
• wherein the upper airflow-guiding member has an upper interception wall extending downwardly from an inner surface of the cover, the upper interception wall and the cover being intersected at a line having a length (Y0);
• the lower airflow-guiding member has a lower interception wall extending upwardly from an inner surface of the base, the lower interception wall and the base being intersected at a line having a length (Y0);
• wherein the upper and lower interception walls are capable of intercepting the airflow induced by the cooling fan for guiding the airflow to enter the motor's housing,
• the upper airflow-guiding member has two upper air guiding plates respectively at two opposite sides of the upper interception wall, the two plates extending towards the front wall of the cover to define an upper air guiding channel between the upper interception wall and the two air guiding plates;
• the lower airflow-guiding member has two lower air guiding plates respectively at two opposite sides of the lower interception wall, the two plates extending towards the front wall of the base to define a lower air guiding channel between the lower interception wall and the two lower air guiding plates;
• wherein the two opposite openings of the motor's housing are respectively located within the upper air guiding channel and the lower air guiding channel.