A dual voltage circuit and garment steamer

Abstract

The utility model discloses a kind of double-voltage circuit and garment steamer, double-voltage circuit includes power supply circuit, control chip, first relay, second relay, the power supply circuit converts alternating current power into direct current voltage output as control chip, first relay and second relay provide power supply;The control chip output signal controls the first relay and the second relay attraction or disconnect;The common contact of the first relay is sequentially connected first heating body and power supply fire line, the normally open contact of the first relay is connected power supply zero line, the common contact of the second relay is sequentially connected second heating body and power supply zero line, the normally open contact of the second relay is connected power supply fire line, the normally closed contact of the first relay and the normally closed contact of the second relay are interconnected.Garment steamer can be normally operated under voltage 100-240VAC, while under the voltage of 100-240VAC, two heating bodies in steam generator work simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of steam ironing technology, and in particular to a dual-voltage circuit and a garment steamer. Background Technology

[0002] There are two international voltage standards: 110VAC and 220VAC. Chinese products sold worldwide often need to address this issue. Generally, manufacturers split their production lines into two groups to produce products suitable for 110VAC and 220VAC, and then sell them to countries with different voltage standards.

[0003] A garment steamer is a device that heats water into steam to iron clothes. Existing manufacturers produce garment steamers or steaming devices that can be used with both 110VAC and 220VAC operating voltages. They generally have a switch, which can be turned to the corresponding setting when in use.

[0004] However, if you forget to switch, using the 220V rated voltage setting under 110VAC mains power will result in low heating power and long heating time; using the 110V rated voltage setting under 220V AC mains power will cause the fuse to blow or even burn out the garment steamer, endangering the personal safety of consumers. Utility Model Content

[0005] The purpose of this invention is to provide a dual-voltage circuit and a garment steamer. The dual-voltage circuit of this invention is set in the garment steamer so that the garment steamer can operate normally under a voltage of 100-240VAC. At the same time, under a voltage of 100-240VAC, the two heating elements in the steam generator work simultaneously.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a dual-voltage circuit, including a power supply circuit, a control chip, a first relay, and a second relay. The power supply circuit converts AC power into DC voltage output to provide power to the control chip, the first relay, and the second relay. The control chip outputs a signal to control the first relay and the second relay to engage or disengage. The common contact of the first relay is sequentially connected to a first heating element and a live power wire, and the normally open contact of the first relay is connected to a neutral power wire. The common contact of the second relay is sequentially connected to a second heating element and a neutral power wire, and the normally open contact of the second relay is connected to a live power wire. The normally closed contacts of the first relay and the second relay are interconnected.

[0007] By adopting the above technical solution, the first heating element and the second heating element are connected in parallel or in series by the activation or deactivation of the first and second relays, so that the electrical appliance can operate normally under 100-240VAC voltage while the first heating element and the second heating element work simultaneously.

[0008] A further feature of this invention is that the negative terminal of the coil contact of the first relay is connected to the collector of the first transistor, the base of the first transistor is connected to the control chip, and the emitter of the first transistor is connected to the ground point.

[0009] A further feature of this invention is that the negative terminal of the coil contact of the second relay is connected to the collector of the second transistor, the base of the second transistor is connected to the control chip, and the emitter of the second transistor is connected to the ground point.

[0010] A further feature of this invention is that the positive terminals of the coil contacts of the first relay and the second relay are respectively connected to the voltage output terminals of the power supply circuit.

[0011] A further feature of this invention is that the dual-voltage circuit further includes a voltage sampling circuit, which includes voltage dividing resistors R8, R9, and R10, which are connected in series, and the voltage dividing resistor R10 is connected to the control chip.

[0012] A further feature of this invention is that it includes a pump starting circuit, which is connected to the negative terminal of the pump body; the pump starting circuit includes a diode D3, a silicon controlled rectifier SCR1, a resistor R11, a resistor R27, and a capacitor C3.

[0013] A further feature of this invention is that the power supply circuit includes a power chip IC1 and a Zener diode ZD2, wherein the output voltage of the power chip IC1 is 12V and the Zener diode ZD2 has a Zener voltage of 5V.

[0014] A garment steamer includes a body, the body of which is provided with a steam generator and a PCB board, the PCB board being provided with the aforementioned dual-voltage circuit.

[0015] A further feature of this invention is that the steam generator is provided with a first heating element and a second heating element, which are arranged in parallel.

[0016] A further feature of this invention is that the body is provided with a handheld part, the PCB board is disposed inside the handheld part, and the PCB board is provided with a first relay and a second relay.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the garment steamer using the dual voltage circuit of the present invention can operate normally under a voltage of 100-240VAC, and at the same time, the two heating elements in the steam generator work simultaneously under a voltage of 100-240VAC. Attached Figure Description

[0018] Figure 1 This is the circuit diagram of the dual-voltage circuit in Example 1.

[0019] Figure 2 This is a schematic diagram of relays REL1 and REL2 in Example 1.

[0020] Figure 3 This is the circuit diagram of the voltage sampling circuit in Example 1.

[0021] Figure 4 This is the circuit diagram of the pump start-up circuit in Example 1.

[0022] Figure 5 This is a schematic diagram of the dual-voltage circuit in Example 1.

[0023] Figure 6 This is a schematic diagram of the garment steamer in Example 2.

[0024] Figure 7 This is a schematic diagram of the top of the garment steamer in Example 2.

[0025] Figure 8 This is a cross-sectional view of the garment steamer in Example 2.

[0026] Figure 9 This is a schematic diagram of the PCB board in Example 2.

[0027] In the diagram: 1. Main body; 2. Handle; 3. Steam generator; 4. First heating element; 5. Second heating element; 6. PCB board; 7. First relay; 8. Second relay; 9. First transistor; 10. Second transistor; 11. Power supply circuit; 12. Control chip; 13. Electromagnetic pump; 14. Water tank. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. It should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] This utility model discloses a dual-voltage circuit and a garment steamer. This dual-voltage circuit is used in steam equipment such as garment steamers and steam brushes. It is connected to a steam generator 3 with a first heating element 4 and a second heating element 5, so that the steam equipment can work in a voltage range of 100-127V / 220-240V. Moreover, the first heating element 4 and the second heating element 5 in the steam generator 3 always operate simultaneously and have the same operating power under different voltage conditions of 100-127V / 220-240V.

[0030] Example 1 like Figure 1-5 As shown, a dual-voltage circuit includes a power supply circuit 11, a control chip 12, a first relay 7, a second relay 8, and a voltage sampling circuit. The power supply circuit 11 converts the power supply voltage into DC voltage to provide power to the control chip 12, the first relay 7, and the second relay 8. The control chip 12 outputs signals to control the first relay 7 and the second relay 8 to engage or disengage, thereby connecting the first heating element 4 and the second heating element 5 in parallel or in series, so that the heating elements can operate simultaneously and normally within a voltage range of 100-240VAC. The voltage sampling circuit collects the voltage value in the circuit and outputs it to the control chip 12, allowing the control chip 12 to determine whether it is operating under 110V or 200V AC mains power.

[0031] like Figure 2 , Figure 5 As shown, at 100-127V, both the first relay 7 and the second relay 8 are engaged, connecting the first heating element 4 and the second heating element 5 in parallel. The voltage drop across each heating element is approximately 110V, and the first heating element 4 and the second heating element 5 operate at their rated power. At 220-240V, both the first relay 7 and the second relay 8 are disengaged, connecting the first heating element 4 and the second heating element 5 in series. After voltage division in series, the voltage drop across each heating element is still approximately 110V, and the first heating element 4 and the second heating element 5 operate at their rated power. Therefore, the heating elements operate normally within the 100-240VAC voltage range.

[0032] like Figure 1 As shown, the power supply circuit 11 in this embodiment includes a power chip IC1 and a Zener diode ZD2. The power chip IC1 steps down the rectified and filtered AC mains power to a 12V DC voltage output, and the Zener diode ZD2 clamps the 12V voltage to a 5V voltage output to provide power to the control chip 12.

[0033] like Figure 2As shown, the first relay 7 is relay REL1, and the first transistor 9 is transistor Q1. Relay REL1 and transistor Q1 are electrically connected. The positive terminal of the coil contact of relay REL1 is connected to a 12V DC power supply, and the negative terminal of the coil contact of relay REL1 is connected to the collector of transistor Q1. The emitter of transistor Q1 is connected to ground. The base of transistor Q1 is connected to resistor R3 and then to control chip 12. Control chip 12 outputs a signal IO_REL1 to trigger transistor Q1 to conduct and control relay REL1 to close. Similarly, as shown in the figure, the second relay 8 is relay REL2, and the second transistor 10 is transistor Q2. Control chip 12 outputs a signal IO_REL2 to trigger transistor Q2 to conduct and control relay REL2 to close.

[0034] like Figure 2 The common contact COM of relay REL1 is connected to point Boiler1. Point Boiler1 is connected in sequence to the first heating element 4 and the power supply live wire L. The normally open contact NO of relay REL1 is connected to the power supply neutral wire N. The normally closed contact NC of relay REL1 is connected to the H_GS line, which is to connect to the normally closed contact NC of relay REL2. The common contact COM of relay REL2 is connected to point Boiler2. Point Boiler2 is connected in sequence to the second heating element 5 and the power supply neutral wire N. The normally open contact NO of relay REL2 is connected to the power supply live wire L. The normally closed contact NC of relay REL2 is connected to the H_GS line, which is to connect to the normally closed contact NC of relay REL1. That is, at 220V, the first relay 7 and the second relay 8 are not energized, the current flows through the normally closed contact, the first heating element 4 and the second heating element 5 are connected in series, and the 220V voltage is divided across the first heating element 4 and the second heating element 5 respectively, and the normal power operation is maintained; at 110V, the first relay 7 and the second relay 8 are energized, the first relay 7 and the second relay 8 are switched to the normally open contact respectively, the first heating element 4 and the second heating element 5 are connected in parallel, the voltage drop across the first heating element 4 and the second heating element 5 remains unchanged, and the normal power operation is maintained.

[0035] like Figure 3 As shown, the voltage sampling circuit includes voltage divider resistors R8, R9, and R10. The voltage divider resistors R8, R9, and R10 are connected in series to divide the voltage according to their values. One end of the voltage divider resistor R8 is connected to the power supply circuit 11, and the other end of the voltage divider resistor R9 is connected to the control chip 12. The voltage signal is transmitted to the control chip 12 to determine whether the power supply voltage is 110V or 220V.

[0036] like Figure 1As shown, the control chip 12 is chip U1. Chip U1 receives the signal IO_CHK_AD output from the voltage sampling circuit. Chip U1 performs logical judgment based on the voltage division values ​​of these resistors. If a preset voltage is set, such as 150V, and the voltage is lower than 140V, the voltage environment is determined to be 100-127V. Chip U1 outputs a signal to control the activation of the first relay 7 and the second relay 8, and the first heating element 4 and the second heating element 5 are connected in parallel. If the voltage is higher than 150V, the voltage environment is determined to be 220-240V. Chip U1 does not output a signal, the first relay 7 and the second relay 8 are disconnected and connected at the normally closed contact NC, and the first heating element 4 and the second heating element 5 are connected in series.

[0037] The dual-voltage circuit of this invention can operate normally within a voltage range of 100-240VAC.

[0038] like Figure 4 As shown, the dual-voltage circuit also includes a pump start-up circuit. The pump start-up circuit is connected to the negative terminal of the electromagnetic pump 13 to form a power circuit on the electromagnetic pump 13, starting the electromagnetic pump 13 to pump water. The pump start-up circuit includes a diode D3, a silicon controlled rectifier (SCR1), a resistor R11, a resistor R27, and a capacitor C3. The electromagnetic pump 13, diode D3, SCR1, and ground point are connected in sequence. The gate (G) terminal of the SCR1 is connected to one end of the resistor R27, and the other end of the resistor R27 is connected to the control chip 12. The resistor R11 is connected to the gate (G) and the T1 terminal of the SCR1. The resistor R27 is connected to the diode D3, and the capacitor C3 is connected to the resistor R27.

[0039] Example 2 like Figure 6-9 As shown, this utility model also discloses a garment steamer, including a garment steamer body 1, the body 1 including a handle 2, a steam generator 3 provided on the body 1, a first heating element 4 and a second heating element 5 arranged in parallel inside the steam generator 3, the steam generator 3 heats the liquid to produce water vapor which is sprayed out from the nozzle; a PCB board 6 is provided inside the handle 2, and a dual voltage circuit is provided on the PCB board 6.

[0040] like Figure 9 The PCB board 6 has Boiler1, N, Boiler2, AC1, PUMP1, and AC2 points. Boiler1 is connected to the first heating element 4, the thermal protector, and the live wire L in sequence. N is connected to the neutral wire N in sequence. Boiler2 is connected to the second heating element 5, the thermostat, and the neutral wire N in sequence. AC1 is connected to the thermal protector and the live wire L in sequence. PUMP1 is connected to the negative terminal of the electromagnetic pump 13. The positive terminal of the electromagnetic pump 13 is connected to the thermal protector and the live wire L in sequence. AC2 is connected to the thermostat and the neutral wire N in sequence.

[0041] like Figure 8 , Figure 2 The PCB board 6 is provided with a first relay 7 and a second relay 8. The common contact COM of the first relay 7 is connected to the Boiler1 point, the normally open contact NO of the first relay 7 is connected to the N point, the normally closed contact NC of the first relay 7 is connected to the normally closed contact NC of the second relay 8, the common contact COM of the second relay 8 is connected to the Boiler2 point, and the normally open contact NO of the second relay 8 is connected to the AC1 point.

[0042] like Figure 8 As shown, a water tank 14 is provided at the bottom of the machine body 1, and an electromagnetic pump 13 is provided inside the machine body 1. The electromagnetic pump 13 pumps water to the steam generator 3 for heating.

[0043] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A dual voltage circuit, characterized by: Includes a power supply circuit (11), a control chip (12), a first relay (7), and a second relay (8). The power supply circuit (11) converts AC power into DC voltage output to provide power to the control chip (12), the first relay (7), and the second relay (8); The control chip (12) outputs a signal to control the first relay (7) and the second relay (8) to engage or disengage; The common contact of the first relay (7) is connected to the first heating element (4) and the power live wire in sequence. The normally open contact of the first relay (7) is connected to the power neutral wire. The common contact of the second relay (8) is connected to the second heating element (5) and the power neutral wire in sequence. The normally open contact of the second relay (8) is connected to the power live wire. The normally closed contact of the first relay (7) and the normally closed contact of the second relay (8) are connected to each other.

2. A dual voltage circuit according to claim 1, characterized in that: The negative terminal of the coil contact of the first relay (7) is connected to the collector of the first transistor (9), the base of the first transistor (9) is connected to the control chip (12), and the emitter of the first transistor (9) is connected to the ground point.

3. A dual voltage circuit according to claim 1, characterized in that: The negative terminal of the coil contact of the second relay (8) is connected to the collector of the second transistor (10), the base of the second transistor (10) is connected to the control chip (12), and the emitter of the second transistor (10) is connected to the ground point.

4. A dual voltage circuit according to claim 1, characterized in that: The positive terminals of the coil contacts of the first relay (7) and the second relay (8) are respectively connected to the voltage output terminals of the power supply circuit (11).

5. A dual voltage circuit according to claim 1, characterized in that: The dual-voltage circuit also includes a voltage sampling circuit, which includes voltage divider resistors R8, R9, and R10, which are connected in series. Meanwhile, the voltage divider resistor R10 is connected to the control chip (12).

6. A dual-voltage circuit according to claim 1, characterized in that: It also includes a pump start circuit, which is connected to the negative terminal of the pump body; the pump start circuit includes a diode D3, a silicon controlled rectifier SCR1, a resistor R11, a resistor R27, and a capacitor C3.

7. A dual-voltage circuit according to claim 1, characterized in that: The power supply circuit (11) includes a power chip IC1 and a Zener diode ZD2. The output voltage of the power chip IC1 is 12V, and the Zener diode ZD2 has a Zener voltage of 5V.

8. A garment steamer, comprising a body (1), characterized in that: The body (1) is provided with a steam generator (3) and a PCB board (6), and the PCB board (6) is provided with a dual voltage circuit as described in any one of claims 1-7.

9. A garment steamer according to claim 8, characterized in that: The steam generator (3) is provided with a first heating element (4) and a second heating element (5), which are arranged in parallel.

10. A garment steamer according to claim 8, characterized in that: The body (1) is provided with a handle (2), the PCB board (6) is located inside the hand-held part, and the PCB board (6) is provided with a first relay (7) and a second relay (8).

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