Arrangement of exhaust channel of a vacuum cleaner by-pass unit

Uspo° d n v²fukov ho kan lu by-pass agreg tu vysava e, kter² to agreg t zahrnuje jednotku motoru a v²tla n ho ventil toru pro vytv °en podtlaku, kde v²tla n² ventil tor je obklopen ventil torov²m krytem (2) upevn n²m na lo iskov m Üt tu (1) motoru a d le zahrnuje soustavu v²fukov²ch kan lk vzduchu, jeho podstata spo v v tom, e lo iskov² Üt t (1) vytvo°en² z termoplastu m na stran p°ivr cen k ob n mu ventil torov mu kolu (8) prstencovou obvodovou oblast, na kter jsou uspo° d na rovnom rn rozlo en r diusov ebra (3) za naj c u vnit°n ho pr m ru prstencov oblasti, odpov daj c ho vn jÜ mu pr m ru ob n ho ventil torov ho kola (8), a prob haj c k vn jÜ mu pr m ru prstencov oblasti a tvo° c vodic st ny vymezuj c mezi sebou vodic kan lky (9) pro v²fuk vzduchu vych zej c ho z vodic ch lopatek ob n ho ventil torov ho kola (8), p°i em v²Üka eber (3) se zv tÜuje sm rem k vn jÜ mu pr m ru prstencov oblasti a ebra (3) jsou na sv²ch voln²ch konc ch opat°ena upev ovac mi ebry (4) odd len²mi od vnit°n ho t lesa eber (3) dr kou, jej hloubka je menÜ ne je v²Üka eber (3) v tomto m st a v dr ce je ulo ena okrajov oblast zajiÜ ovac hranou (6) opat°en bo n st ny (5) ventil torov ho krytu (2).\ In the present invention there is disclosed an arrangement of exhaust channel of a vacuum cleaner by-pass unit, which by-pass unit comprises a motor and a delivery fan unit for producing vacuum, wherein said delivery fan is encircled by a fan cover (2) fastened on a motor end shield (1), and it further comprises a system of air exhaust channel. The invention is characterized in that said end shield (1), being made of thermoplastic, has on the side turned to the fan impeller (8) an annular peripheral region with radius ribs (3) uniformly arranged thereon. The ribs (3) front end is close to the annular region internal diameter corresponding to outside diameter of the fan impeller (8), and the ribs (3) extending toward outside diameter of the annular region form guide walls defining guide channels (9) for exhaust of air leaving guide blades of the fan impeller (8), whereby the height of the ribs (3) increases in the direction toward said annular region outside diameter and the ribs (3) are provided at their free ends with fixing ribs (4) separated from the rib (3) internal body by a groove the depth of which is less than the rib (3) height at this point, whereby said a peripheral region of fan cover (2) side wall (5) provided with a securing edge (6) is seated in this groove.