AIR INFLATOR DEVICE

An air inflator device contains: an accommodation box and an air compressor (9). The accommodation box includes a cap (1) and a case (2), and the air compressor (9) and an air guiding mechanism are received in the cap (1) and the case (2). The air guiding mechanism is configured to frame a cooling fan (91) which is rotatably with a motor (92) of the air compressor (9). A flowing orifice (5) is defined by a first directing portion (3) and a second directing portion (4), and a first semicircular cover (32) and a second semicircular cover (42) of the air guiding mechanism are configured to collect and guide air so that the cooling fan (91) rotates to guide the air to the air compressor (9), thus dissipating heat and prolonging a service life of the air compressor (9).