Multi-Power Garment Steamer and Control Circuit Thereof

Abstract

A control circuit includes a power switch, a heating unit, a water supply unit and a circuit module, wherein the power switch is connected to the heating unit and the water supply unit, and the heating unit and the water supply unit are connected to the circuit module, wherein the circuit module is used to adjust input voltage of different voltage environments to enable the multi-power garment steamer works normally.

What is claimed is: 
     
         1 . A control circuit for a multi-power garment steamer, wherein the control circuit, which is adapted for being connected to two terminals of a power source, comprises:
 a power switch;   a heating unit;   a water supply unit; and   a circuit means, wherein the power switch is connected to the heating unit and the water supply unit, and the heating unit and the water supply unit are connected to the circuit means, wherein the circuit means is used to adjust input voltage of different voltage environments to enable the multi-power garment steamer works normally.   
     
     
         2 . The control circuit according to  claim 1 , wherein the heating unit comprises a first heating element and a second heating element, wherein the circuit means is configured to allow the two heating elements to be connected in series when a higher input power voltage is applied, and allow the two heating elements to be connected in parallel when a lower input power voltage is applied. 
     
     
         3 . The control circuit according to  claim 2 , wherein the higher input power voltage is in the range of 220V-240V, the lower input power voltage is in the range of 100V-120V. 
     
     
         4 . The control circuit according to  claim 1 , wherein the circuit means is a voltage regulating circuit comprising a working voltage selection switch and a voltage dividing resistor which is parallel to the working voltage selection switch, wherein when the working voltage selection switch is disconnected, the voltage dividing resistor is connected to the voltage regulating circuit to divide the voltage; when the working voltage selection switch is closed, the voltage dividing resistor is short-circuited, and thus is not connected to the voltage regulating circuit. 
     
     
         5 . The control circuit according to  claim 4 , wherein an impedance of the voltage dividing resistor satisfies the following relationship: 
       
         
           
             
               
                 z 
                 vd 
               
               = 
               
                 a 
                 / 
                 
                   ( 
                   
                     
                       1 
                       
                         Z 
                         f 
                       
                     
                     + 
                     
                       1 
                       
                         Z 
                         w 
                       
                     
                   
                   ) 
                 
               
             
           
         
         wherein Z vd  denotes the impedance of the voltage dividing resistor, Z f  denotes an impedance of the heating unit, and Z w  denotes an impedance of the water supply unit, wherein a value range of a is [0.9, 1.1]. 
       
     
     
         6 . The control circuit according to  claim 4 , wherein an impedance of the voltage dividing resistor is equal to an overall impedance of the heating unit and the water supply unit. 
     
     
         7 . The control circuit according to  claim 1 , wherein the circuit means is an automatic voltage division control circuit comprising a voltage dividing resistor, a power supply circuit, an AC voltage detection circuit, a relay control circuit, road, and an automatic voltage-dividing switch circuit, wherein the voltage-dividing resistor is connected in parallel with the automatic voltage-dividing switch circuit, the power switch is connected to the power supply circuit, and the power supply circuit is connected to the relay control circuit, the power switch is connected to the AC voltage detection circuit, and the AC voltage detection circuit is connected to the relay control circuit, the relay control circuit is in cooperation with the automatic voltage dividing switch circuit. 
     
     
         8 . The control circuit according to  claim 7 , wherein the automatic voltage-dividing switch circuit comprises a relay control switch and an arc-extinguishing circuit, wherein the relay control switch is connected in parallel with the voltage dividing resistor; the arc extinguishing circuit is connected in parallel with the relay control switch. 
     
     
         9 . The control circuit according to  claim 8 , wherein the arc extinguishing circuit comprises a resistor R 7  and a capacitor C 4 , the resistance R 7  is connected in series with the capacitor C 4 . 
     
     
         10 . The control circuit according to  claim 8 , wherein the AC voltage detection circuit comprises a diode D 4 , a resistance R 8 , a resistance R 9 , a resistance R 10  and a capacitor C 5 , the power switch is connected in series with the diode D 4 , the resistance R 8  and the resistor R 9 , the resistance R 9  is connected to the relay control circuit, the power switch is connected in series with the diode D 4 , the resistance R 8 , the resistance R 9  and the resistor R 10 , the resistor R 10  is connected to the relay control circuit, the capacitor C 5  is connected in parallel with the resistor R 10  at two ends thereof. 
     
     
         11 . The control circuit according to  claim 10 , wherein the relay control circuit comprises an N-MOS tube Q 1 , a P-MOS Tube Q 2 , a Relay K 1 , a diode D 3 , a resistance R 11  and a resistor R 12 , the resistance R 9  is connected to a gate of the P-MOS Tube Q 2 ; the resistance R 10  is connected to a drain of the P-MOS tube Q 2 ; a source of the P-MOS tube Q 2  is connected to a gate of the N-MOS Tube Q 1 , a drain of the P-MOS Tube Q 2  is connected to a source of the N-MOS Tube Q 1 , a voltage output terminal of the power supply circuit is connected to the resistor R 12 , the resistor R 12  is connected to the gate of the N-MOS Tube Q 1 , the voltage output terminal of the power supply circuit is connected to the relay K 1 , the relay K 1  is connected to the drain of the N-MOS Tube Q 1 , the diode D 3  is reverse connected between the voltage output of the power supply circuit and the drain of the N-MOS Tube Q 1 , and the relay K 1  is in cooperation with the automatic voltage dividing switch circuit. 
     
     
         12 . The control circuit according to  claim 1 , further comprising a load circuit, a bridge rectifier module, and a MOS control circuit, the power switch is connected to the load circuit which comprises two parallel branches: a first branch connecting to the water supply unit, and a second branch connecting to the bridge rectifier module; wherein the bridge rectifier module is further connected in series with the heating unit, wherein the load circuit is connected to the MOS control circuit, and the MOS control circuit is connected to the bridge rectifier module for determining whether to disconnect the load circuit based on whether peak operating voltage exceeds a preset threshold, ensuring normal operation of the multi-power garment steamer under different power supply voltages. 
     
     
         13 . The control circuit according to  claim 1 , further comprising a load circuit, a bridge rectifier module, and an MCU control circuit, wherein the power switch is connected to the load circuit which comprises two parallel branches: a first branch is in series with the water supply unit, and a second branch is connected to the bridge rectifier module and the heating unit; wherein the load circuit is connected to the MCU control circuit, which in turn is connected to the bridge rectifier module, wherein the MCU control circuit is used to determine whether to disconnect the load circuit based on whether the detected high-voltage signal exceeds a set threshold, ensuring the multi-power garment steamer operates normally under different power voltages. 
     
     
         14 . The control circuit according to  claim 4 , wherein the heating unit comprises a series-connected heating element and a thermal fuse. 
     
     
         15 . The control circuit according to  claim 14 , wherein the heating unit further comprises a temperature controller which is connected in series with the heating element and the thermal fuse. 
     
     
         16 . The control circuit according to  claim 4 , wherein the water supply unit comprises a series-connected diode and a water pump. 
     
     
         17 . The control circuit according to  claim 7 , wherein the heating unit comprises a series-connected heating element and a thermal fuse. 
     
     
         18 . The control circuit according to  claim 17 , wherein the heating unit further comprises a temperature controller which is connected in series with the heating element and the thermal fuse. 
     
     
         19 . The control circuit according to  claim 7 , wherein the water supply unit comprises a series-connected diode and a water pump. 
     
     
         20 . The control circuit according to  claim 2 , wherein the water supply unit comprises a series-connected diode and a water pump.