Rechargeable vacuum cleaner

Abstract

A rechargeable vacuum cleaner comprises a main body, at least two sets of rechargeable batteries for driving a motor in the main body and a power-supply control unit. The power-supply control unit is coupled with the sets of rechargeable batteries and the motor for affecting a set of rechargeable batteries of higher voltage to supply power to the motor and for preventing the set of rechargeable batteries charging another set of rechargeable batteries of lower voltage. The power-supply control unit includes a silicon assembly (being a bridge rectifier) or a diode. The rechargeable vacuum cleaner can be of two piece type (with a detachable unit) or a two piece type. Therefore, the rechargeable vacuum cleaner can lengthen the operating time and prevent damaging the batteries.

1 . A rechargeable vacuum cleaner, comprising: 
 a main body;    at least two sets of rechargeable batteries for driving a motor located within said main body; and    a power-supply control unit coupled with said sets of rechargeable batteries and said motor for controlling said sets of rechargeable batteries powering said motor.    
   
   
       2 . The rechargeable vacuum cleaner of  claim 1  wherein a positive terminal of said sets of rechargeable batteries is connected to one terminal of said motor through said power-supply control unit, and wherein a negative terminal of said sets of rechargeable batteries is directly connected to another terminal of said motor.  
   
   
       3 . The rechargeable vacuum cleaner of  claim 1  further including a charging unit connected to said power-supply control unit, whereby said power-supply control unit will complete charging said sets of rechargeable batteries.  
   
   
       4 . The rechargeable vacuum cleaner of  claim 3  further including a switch with one terminal connected to said negative terminal of said sets of rechargeable batteries and another terminal connected to a unit selected from said charging unit and said motor by switching between charging and discharging of said rechargeable batteries.  
   
   
       5 . The rechargeable vacuum cleaner of  claim 1  wherein said power-supply control unit prohibits one of said sets of rechargeable batteries with higher electricity capacity charging another of said sets of rechargeable batteries with lower electricity capacity.  
   
   
       6 . The rechargeable vacuum cleaner of  claim 1  wherein said power-supply control unit is selected from a silicon assembly and a diode.  
   
   
       7 . The rechargeable vacuum cleaner of  claim 6  wherein said silicon assembly is a bridge rectifier.  
   
   
       8 . The rechargeable vacuum cleaner of  claim 1  being a two piece structure having a main body and a detachable unit each equipped with a set of rechargeable batteries; said main body and said detachable unit are electrically connected by a connection port when united.  
   
   
       9 . The rechargeable vacuum cleaner of  claim 1  wherein being a one piece structure having a main body equipped with said sets of rechargeable batteries.