Electric blower and method for constructing the same

Abstract

An electric blower includes a fan section having a fan, a motor section, mechanically connected to the fan to generate airflow, which includes a stator that a plurality of windings are respectively wound, a flame section, configured to support the fan section and the motor section, which has a plurality of airflow opening portions constituting part of an airflow pass from the fan section to the motor section and a drive-control circuit board, located between the fan section and the motor section, which has a drive-control circuit for controlling current supplied to the plurality of windings and further has a plurality of connection terminals each of which has a through hole. To easily connect the end portions of the plurality of windings with the connection terminals of the circuit board respectively, each end portion of the plurality of windings is projected through each through hole of the plurality of connection terminals respectively and the plurality of connection terminals are exposed to the plurality of airflow opening portions of the flame section.

1 . An electric blower comprising: 
 a fan section having a fan;    a motor section configured to drive the fan to generate airflow, the motor section including a stator that a plurality of windings are respectively wound;    a flame section configured to support the fan section and the motor section, the flame section having a plurality of airflow opening portions which constitute an airflow pass from the fan section to the motor section; and    a drive-control circuit board located between the fan section and the motor section, the circuit board having a drive-control circuit for controlling current supplied to the plurality of windings, the circuit board further having a plurality of connection terminals each of which has a through hole;    wherein end portions of the plurality of windings are electrically connected with the corresponding connection terminals respectively in a state that each end portion of the plurality of windings is projected through each through hole of the plurality of connection terminals respectively and, the drive-control circuit board is supported by the flame section in a state that the plurality of connection terminals are exposed to the plurality of airflow opening portions of the flame section.    
   
   
       2 . A blower according to  claim 1 , wherein the flame section has a circular flame portion and the drive-control circuit of the drive-control circuit board includes a plurality of power devices each having a main body and a terminal for switching the current supplied to the plurality of windings, the main body of each power device being fixed on the circular flame portion and the terminals of the plurality of power devices being electrically connected to the corresponding connection terminals of the drive-control circuit board.  
   
   
       3 . A method for assembling an electric blower which comprises a fan section, a motor section having a stator that a plurality of windings are respectively wound and a flame section having a flame and a drive-control circuit board, including the steps of 
 supporting the drive-control circuit board by the flame in a state that a plurality of connection terminals provided on the drive-control circuit board are exposed to a plurality of airflow opening portions of the flame section;    projecting each end portion of the plurality of windings through each through hole which is formed on each connection terminal of the circuit board;    fixing the motor section on the flame section; and    electrically connecting each end portion of the plurality of windings with each connection terminal of the circuit board, respectively.    
   
   
       4 . A method according to  claim 3 , wherein the drive-control circuit board includes a plurality of power devices each having a main body and an electrical terminal, the method further including the steps of: 
 fixing the main body of each power device on the flame of the flame section; and    electrically connecting each electrical terminal of power devices with each connection terminal of the drive-control circuit board after each main body of power devices is fixed on the flame.