| 摘要 |
FIELD: invention refers to vacuum cleaner whose construction allows improve isolation of noise created by it due to reinforcement of material circling around casing of driving engine and construction of casing. ^ SUBSTANCE: vacuum cleaner has main body divided inside on dust catching chamber and engine compartment, brush unit connecting with dust catching chamber and fulfilled with sucking in opening through which external air polluted with dust is sucked in; engine unit installed in engine compartment in transversal direction to main body of vacuum cleaner, creating sucking in effort and fulfilled with outlet opening for air, and casing of engine circling around engine unit and fulfilled with outlet for discharging air through outlet opening. In outlet passage formed with casing of engine there is sound insulation plate fulfilled out of porous material. Casing of engine has sound insulation part at least part of which is fulfilled out of porous material. At least part of air discharged from outlet opening for air passes through sound insulation part. Sound insulation plate of porous plastic of low density, sound isolation part is fulfilled of porous plastic of high density and remaining part of casing of engine except of sound insulation part is fulfilled of high strength plastic. Outlet passage has inner pass formed in casing of engine and external pass formed outside of casing of engine. Inner passage is fulfilled along spiral and discharges air passing through indicated outlet opening for air of engine unit along spiral. ^ EFFECT: improves noise isolation. ^ 4 cl, 9 dwg |
