Vacuum cleaner

Abstract

A hand-held vacuum cleaner comprising a motor/fan unit configured to generate an airflow having a first direction at an inlet of the motor/fan unit and a first air conducting path arranged downstream of the motor/fan unit. The first air conducting path is configured to direct air to flow in a direction opposite to the first direction. The first air conducting path is arranged radially outside of the motor/fan unit along more than 40% of the length of the motor/fan unit measured in the first direction.

1 . A hand-held vacuum cleaner comprising:
 a motor/fan unit configured to generate an airflow having a first direction at an inlet of the motor/fan unit; and   a first air conducting path arranged downstream of the motor/fan unit;   wherein the first air conducting path is configured to direct air to flow in a direction opposite to the first direction,   and the first air conducting path is arranged radially outside of the motor/fan unit along more than 40% of a length of the motor/fan unit measured in the first direction.   
     
     
         2 . The hand-held vacuum cleaner according to  claim 1 , wherein the first air conducting path is arranged radially outside of the motor/fan unit along more than 80% of the length of the motor/fan unit. 
     
     
         3 . The hand-held vacuum cleaner according to  claim 1 , wherein the first air conducting path is arranged radially outside of the motor/fan unit along the entire length of the motor/fan unit. 
     
     
         4 . The hand-held vacuum cleaner according to  claim 1 , wherein the first air conducting path at least partially encloses the motor/fan unit. 
     
     
         5 . The hand-held vacuum cleaner according to  claim 4 , wherein the first air conducting path encloses more than 50% of a circumference of the motor/fan unit. 
     
     
         6 . The hand-held vacuum cleaner according to  claim 1 , wherein the first air conducting path comprises an air diverting portion configured to change the airflow direction 180 degrees, and wherein the air diverting portion is arranged directly downstream of the motor/fan unit. 
     
     
         7 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises a handle assembly and a second air conducting path arranged downstream of the first air conducting path, and wherein the second air conducting path extends through a portion of the handle assembly. 
     
     
         8 . The hand-held vacuum cleaner according to  claim 7 , wherein the handle assembly comprises an elongated handle unit configured to be gripped by a user during operation of the vacuum cleaner and a second elongated unit arranged at a distance from the elongated handle unit, and wherein the second air conducting path extends through at least a portion of the second elongated unit. 
     
     
         9 . The hand-held vacuum cleaner according to  claim 8 , wherein the vacuum cleaner comprises an air outlet arranged on the second elongated unit. 
     
     
         10 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises a battery assembly configured to supply electricity to the motor/fan unit. 
     
     
         11 . The hand-held vacuum cleaner according to  claim 8 , wherein the vacuum cleaner comprises a battery assembly configured to supply electricity to the motor/fan unit, and wherein the battery assembly is supported relative to a main body of the vacuum cleaner via the elongated handle unit and the second elongated unit. 
     
     
         12 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises an air outlet comprising at least a portion being arranged in front of the motor/fan unit seen along the first directions. 
     
     
         13 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises an air outlet comprising a perforated section of a body component of the vacuum cleaner. 
     
     
         14 . The hand-held vacuum cleaner according to  claim 13 , wherein the perforated section comprises a number of small-sized through-holes through the body component, and wherein a total cross sectional area of the number of small-sized through-holes is equal to, or greater than, a cross sectional area of the first air conducting path. 
     
     
         15 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises power electronics configured to control operation of the motor/fan unit, and wherein the vacuum cleaner comprises an air channel configured to direct a partial flow of air past the power electronics to a secondary air outlet of the vacuum cleaner to cool the power electronics. 
     
     
         16 . The hand-held vacuum cleaner according to  claim 15 , wherein the vacuum cleaner comprises a main body which accommodates at least the motor/fan unit and the first air conducting path, and wherein the air channel is arranged on the main body. 
     
     
         17 . The hand-held vacuum cleaner according to  claim 16 , wherein the air channel is arranged behind the motor/fan unit seen along the first direction. 
     
     
         18 . The hand-held vacuum cleaner according to  claim 16 , wherein the secondary air outlet is arranged on the main body at a location behind the motor/fan unit seen along the first direction. 
     
     
         19 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises a second air conducting path arranged downstream of the first air conducting path, and wherein walls of at least one of the first and second air conducting paths are covered by a noise attenuating material. 
     
     
         20 . The hand-held vacuum cleaner according to  claim 1 , wherein the vacuum cleaner comprises a perforated cylindrical body arranged around the motor/fan unit, and wherein the first air conducting path extends at least partially through holes of the perforated cylindrical body.