Vacuum cleaner

Abstract

The vacuum cleaner includes a cleaner body comprising a suction motor for generating a suction force, a suction part that communicates with the cleaner body to suction air and dusts, a battery disposed in the cleaner body or the suction part to supply a power to the suction motor, a charger separably connected to the cleaner body or the suction part to charge the battery, and a voltage regulator regulating a voltage between an output terminal of the charger and the suction motor so that a voltage outputted from the charger is greater than that inputted into the suction motor.

What is claimed is: 
     
         1 . A vacuum cleaner comprising:
 a cleaner body comprising a suction motor to generate suction;   a suction part that communicates with the cleaner body to suction air and dust particles;   a battery disposed in the cleaner body or the suction part to supply power to the suction motor;   a charger separably connected to the cleaner body or the suction part to charge the battery; and   a voltage regulator to regulate a voltage between an output terminal of the charger and the suction motor so that a voltage outputted from the charger is greater than a voltage inputted into the suction motor.   
     
     
         2 . The vacuum cleaner according to  claim 1 , wherein the voltage regulator comprises a booster to increase a voltage. 
     
     
         3 . The vacuum cleaner according to  claim 2 , wherein the booster increases a voltage outputted from the battery, and the voltage increased by the booster is outputted into the suction motor. 
     
     
         4 . The vacuum cleaner according to  claim 3 , wherein the charger converts an inputted AC voltage into a DC voltage, and
 a DC voltage of 42.4 V or less is supplied to the cleaner body.   
     
     
         5 . The vacuum cleaner according to  claim 3 , wherein the battery has a maximum charging voltage of 42.4 V or less. 
     
     
         6 . The vacuum cleaner according to  claim 3 , wherein the booster increases the voltage outputted from the battery so that a maximum DC voltage supplied to the suction motor is at least 84.8 V. 
     
     
         7 . The vacuum cleaner according to  claim 2 , wherein the booster increases the voltage outputted from the charger, and
 the voltage increased by the booster is supplied to the battery.   
     
     
         8 . The vacuum cleaner according to  claim 7 , wherein the charger converts an inputted AC voltage into a DC voltage, and
 a DC voltage of 42.4 V or less is supplied to the cleaner body.   
     
     
         9 . The vacuum cleaner according to  claim 8 , wherein a maximum charging voltage of the battery exceeds 42.4 V. 
     
     
         10 . The vacuum cleaner according to  claim 9 , wherein a maximum DC voltage supplied to the suction motor is at least 84.8 V. 
     
     
         11 . The vacuum cleaner according to  claim 2 , wherein the booster comprises a boost converter. 
     
     
         12 . The vacuum cleaner according to  claim 11 , wherein the boost converter is an isolated boost converter that comprises a transformer, a diode, a capacitor, and a switching device. 
     
     
         13 . The vacuum cleaner according to  claim 11 , wherein the boost converter comprises an inductor, a diode, a capacitor, and a switching device, and
 a transformer for insulating is disposed between the boost converter and the battery.   
     
     
         14 . The vacuum cleaner according to  claim 11 , wherein the boost converter is an isolated boost converter that comprises a transformer, a diode, a capacitor, and a switching device. 
     
     
         15 . The vacuum cleaner according to  claim 1 , wherein a plurality of batteries are disposed in the cleaner body or the suction part, and
 the voltage regulator comprises a switching mechanism to connect the plurality of batteries to each other in parallel when the plurality of batteries are charged, and to connect the plurality of batteries to each other in series when the plurality of batteries are discharged.   
     
     
         16 . The vacuum cleaner according to  claim 15 , wherein the charger converts an inputted AC voltage into a DC voltage, and a DC voltage of 42.4 V or less is supplied to the cleaner body, and
 each of the plurality of batteries has a charging voltage of 42.4 V or less.   
     
     
         17 . The vacuum cleaner according to  claim 15 , wherein the switching mechanism comprises a charging switching mechanism that is turned on when the plurality of batteries are charged and is turned off when the plurality of batteries are discharged, and a discharging switching mechanism that is turned on when the plurality of batteries are discharged and is turned off when the plurality of batteries are charged. 
     
     
         18 . The vacuum cleaner according to  claim 17 , wherein the plurality of batteries comprise a first battery and a second battery, and
 the charging switching mechanism comprises:   a first charging switch connecting or disconnecting the second battery with the charger;   a second charging switch connecting or disconnecting the first battery with the charger; and   a third charging switch connecting or disconnecting the first battery with the second battery.   
     
     
         19 . The vacuum cleaner according to  claim 18 , wherein the discharging switching mechanism comprises:
 a first discharging switch connecting or disconnecting the first battery with the suction motor or a controller that controls the suction motor;   a second discharging switch connecting or disconnecting the suction motor or the controller with the second battery; and   a third discharging switch connecting or disconnecting the first battery with the second battery.   
     
     
         20 . A vacuum cleaner comprising:
 a cleaner body comprising a suction motor to generate suction;   a suction part that communicates with the cleaner body to suction air and dust particles;   a battery disposed in the cleaner body or the suction part to supply power to the suction motor;   a charger separably connected to the cleaner body or the suction part to charge the battery; and   a booster to increase a voltage outputted from the charger or a voltage outputted from the battery.