| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized air exhauster which can arbitrarily adjust exhaust ability to improve exhausting efficiency by using an inexpensive electric motor without heat-resistant specification, and has high quietness.SOLUTION: An electric motor 6 and a shaft 7 are always naturally air-cooled by such ascending current that external air is taken-in from a motor-side opening of a shielding case 10 and is introduced into an exhaust tube 4 from an exhaust pipe side opening of a shielding case 10 via the shaft 7 and a blade 8 in addition to a pressure difference by means of the ascending current exhausted into the exhaust pipe 4. A forced exhaust part 5, by activating the electric motor 6 to rotate the blade 8 in addition to natural air-cooling, sucks external air from the motor side opening of the shielding case 10 and performs forcible exhausting to the exhaust pipe 4 of the downstream side in the exhaust direction and, thereby, the electric motor 6 and the shaft 7 are disposed so as to make the forcible cooling of them possible. |
