Electric fan capable to modify angle of air supply

Abstract

An electric fan can comprise: an oscillating motor configured to drive an upper shell to rotate; a fan motor connected with blades of the electric fan; a control unit mounted with the oscillating motor configured to modify an oscillating angle of the electric fan by changing an interval of positive and negative rotation of the oscillating motor; a control panel connected with the control unit configured to operate the electric fan; and a transformer unit configured to connect supply power to the control unit, the oscillating motor, the control panel, and the fan motor.

1 . An electric fan, comprising:
 an oscillating motor configured to drive an upper shell to rotate;   a fan motor connected with blades of the electric fan;   a control unit mounted with the oscillating motor configured to modify an oscillating angle of the electric fan by changing an interval of positive and negative rotation of the oscillating motor;   a control panel connected with the control unit configured to operate the electric fan; and   a transformer unit configured to connect supply power to the control unit, the oscillating motor, the control panel, and the fan motor.   
     
     
         2 . An electric fan according to  claim 1 , wherein the oscillating motor is single-phase motor having a capacitor connected between positive and negative windings, wherein the positive and negative windings are equipped with a public output terminal L; wherein the control unit has a first-output terminal DJ 1  connected with the input terminal N of the positive winding and a second-output terminal DJ 2  connected with an input terminal N of the negative winding; wherein the control unit is configured to alternate output between the output terminal DJ 1  and DJ 2 . 
     
     
         3 . An electric fan according to  claim 2 , wherein the interval of altering output from the first-output terminal DJ 1  and second-output terminal DJ 2  can be set as 4 seconds, 6 seconds, or 8 seconds. 
     
     
         4 . An electric fan according to  claim 2 , wherein the control unit has a high speed output terminal HIGH and a low speed output terminal LOW both connected with the fan motor, wherein the output terminal HIGH and output terminal LOW determine the rotation speed of the fan motor for controlling the air volume. 
     
     
         5 . An electric fan according to  claim 2 , wherein the control panel comprises:
 a TIMER button configured to time the electric fan;   an OSC button configured to control oscillating mode of the electric fan; and   an ON/SP/OFF button configured to control power on or off and to control switching air volume of the electric fan.   
     
     
         6 . An electric fan according to  claim 5 , wherein the control unit is an integrated circuit comprising:
 a pin VDD connected with the transformer unit,   a pin VSS connected with earth,   a pin P0.0/INT0 connected with the first-output terminal DJ 1 ,   a pin XOUT/P1.2 connected with the second-output terminal DJ 2 ,   a pin P1.0 connected with the output terminal HIGH,   a pin XIN/P1.3 connected with the output terminal LOW,   a pin P2.3 connected with the TIMER button,   a pin P2.4 connected with the ON/SP/OFF button, and   a pin P2.5 connected with the OSC button.   
     
     
         7 . An electric fan according to  claim 6 , wherein the control panel has a Speed Status Indicator Light, an Oscillating Mode Indicator Light, an Oscillating Range Indicator Light, and a Timer Indicator Light. 
     
     
         8 . An electric fan according to  claim 1 , wherein the control panel comprises
 a TIMER button configured to time the electric fan;   an OSC button configured to control oscillating mode of the electric fan; and   an ON/SP/OFF button configured to control power on or off and to control switching air volume of the electric fan.