Patent ID: 7954514

Claim:
An air-admitting guide member being formed in a post shape and comprising: an inflow end; an outflow end opposite to the inflow end disposed on an inlet of a mechanical device; a straight flow hole formed in an elongated hole shape, defined between the inflow end and the outflow end and located at an axial center of the post; a plurality of rotational flow holes spaced apart respectively and each being defined between the inflow end and the outflow end, and a diameter of each rotational flow hole being more than that of the straight flow hole, a bottom end of each rotational flow hole flushing with an end surface of the outflow end, and the outflow end including a plurality of annular bores arranged on the end surface thereof and formed in a swirl shape toward the inflow end, and an inner wall of the inflow end being formed in a tilted arc shape and including an end portion formed in a stream-line sector shape, each rotational flow hole including two openings arranged on two ends thereof individually.