Vacuum cleaner

Abstract

A vacuum cleaner has a main body, a motor-driven fan unit, a printed circuit board for controlling the motor-driven fan unit and a housing encasing a portion of the printed circuit board. A heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing. The printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.

1 . A vacuum cleaner comprising a main body, a motor-driven fan unit, a printed circuit board for controlling the motor-driven fan unit, and a housing encasing a portion of the printed circuit board, wherein a heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing, and the printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body. 
     
     
         2 . The vacuum cleaner of  claim 1 , wherein only a portion of the printed circuit board is encased by the housing. 
     
     
         3 . The vacuum cleaner of  claim 1 , wherein the housing is mounted to a surface of the printed circuit board at a region spaced from the perimeter of the printed circuit board. 
     
     
         4 . The vacuum cleaner of  claim 1 , wherein the housing comprises a seal located at an interface between the housing and the printed circuit board. 
     
     
         5 . The vacuum cleaner of  claim 1 , wherein the portion of the printed circuit board encased by the housing comprises surface mounted components of the printed circuit board. 
     
     
         6 . The vacuum cleaner of  claim 1 , wherein the portion of the printed circuit board encased by the housing comprises a lower pollution degree than a portion of the printed circuit board not encased by the housing. 
     
     
         7 . The vacuum cleaner of  claim 1 , wherein the vacuum cleaner comprises a dirt separator, a first air inlet, a second air inlet, a first air flow path between the first air inlet and the dirt separator, and a second air flow path between the second air inlet and the motor-driven fan unit, and the printed circuit board is located in the second air flow path.