Vacuum cleaner with an auxiliary motor

Abstract

A vacuum cleaner includes a main body and a vacuum head connected to the main body through an air hose. The main body includes a main motor and a main impeller driven by the main motor. The vacuum head includes an auxiliary motor connected to the auxiliary impeller and configured to drive the auxiliary impeller. Both the main impeller and the auxiliary impeller are in the duct of the vacuum cleaner. The vacuum uses two smaller power motors to combine the vacuuming effect of the high power motor. This not only reduces costs, improves overall efficiency, but also reduces noise.

What is claimed is: 
     
         1 . A vacuum cleaner, comprising:
 a main body comprising a main motor and a main impeller driven by the main motor;   a vacuum head connected to the main body by an air hose;   wherein the vacuum head further comprises an auxiliary motor connected to an auxiliary impeller and configured to drive the auxiliary impeller; the main impeller and the auxiliary impeller being both located in an air channel of the vacuum cleaner.   
     
     
         2 . The vacuum cleaner according to  claim 1 , wherein the vacuum head has a substantially rectangular shape; the auxiliary motor and the auxiliary impeller located at a substantially middle position along the longitudinal direction of the rectangle. 
     
     
         3 . The vacuum cleaner according to  claim 1 , wherein the power difference between the main motor and the auxiliary motor is within 40%. 
     
     
         4 . The vacuum cleaner according to  claim 1 , wherein the main body further includes a power source; a cable being further connected between the vacuum head and the main body; and the auxiliary motor being powered by the power source through the cable. 
     
     
         5 . The vacuum cleaner of  claim 1 , wherein the main body further includes a container configured to store debris, the container connected to the vacuum head by the air hose. 
     
     
         6 . The vacuum cleaner of  claim 5 , wherein the container includes a dust bag. 
     
     
         7 . The vacuum cleaner of  claim 1 , further comprising a power source for the main motor and the auxiliary motor. 
     
     
         8 . The vacuum cleaner of  claim 7 , wherein the power source includes a battery. 
     
     
         8 . The vacuum cleaner of  claim 7 , wherein when the power source is started, the main motor and the auxiliary motor rotate at the same time and together generate a suction force. 
     
     
         9 . The vacuum cleaner of  claim 1 , wherein both the auxiliary motor and the main motor increase a suction force in the air channel.