Automatic mode switching steam garment steaming machine control circuit and garment steaming machine having the same

Abstract

The present invention discloses an automatic mode switching control circuit for a garment steamer and a garment steamer having the same. The circuit includes a first heating load, a second heating load, a heating load switch driving circuit, an AC voltage step-down sampling circuit and a controller. When the controller obtains the input power supply voltage as a low voltage through the AC voltage step-down sampling circuit, the controller controls the conduction of the second heating load through the heating load switch driving circuit. In this way, when the garment steamer is connected to a high voltage (such as 220V), heating is performed through the first heating load; and when the garment steamer is connected to a low voltage (such as 120V), the second heating load is automatically incorporated and heated together with the first heating load. In this way, the voltage differences between different countries are adaptively adapted, so that the garment steamer can be used across countries. It can meet the heating requirements under various voltage environments, thereby achieving an ideal use effect and facilitating the use of users.

Description

Technical Field

[0001] The present invention relates to the technical field of steam garment steamers, and in particular to an automatic mode switching steam garment steamer control circuit and a garment steamer having the same. Background Art

[0002] The steam hanging iron is a device that can be used in clothing stores, hotels, and homes to make clothes smooth and smooth. Its working principle is mainly to make the clothes smooth and smooth by heating the heating tube to heat the steam, and through continuous contact with the clothes, as well as through actions such as "pulling" and "pressing". When using it, just add water and turn on the power for 1 minute to spray high-pressure steam, aiming at the wrinkles of the clothes, making the clothes smooth and smooth, without the need for an ironing board, and the high-temperature steam has a better cleaning and disinfecting effect.

[0003] Since the garment steamer is a household appliance, it needs to be connected to the AC mains through a plug when in use, so that the AC mains can power the heating tube and water pump in the garment steamer. Since the AC mains voltages in China, Britain, Japan, the United States and other countries are different, the relatively low voltage heating tube (such as 120V heating tube) will burn out when used with high voltage (such as 220V), making the garment steamer unable to be used across borders.

[0004] In the prior art, one solution is to connect two heating tubes in parallel, one of which corresponds to 220V high AC, and the other corresponds to 120V relatively low AC. When in use, the user can select the heating tube by a manual switch. However, this method may also burn the heating tube due to user misoperation. Another solution is to connect two 220V heating tubes in parallel or two 120V heating tubes in series. When in use, the user can select one of them to be turned on or both to be turned on at the same time by a manual switch. This solution also causes misoperation for unfamiliar users, and thus fails to achieve the desired use effect. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide an automatic mode switching steam garment steamer control circuit and a garment steamer having the same.

[0006] On the one hand, in order to achieve the above-mentioned purpose, according to an automatic mode switching control circuit of a garment steamer according to an embodiment of the present invention, the automatic mode switching control circuit of a garment steamer comprises:

[0007] A first heating load, wherein two ends of the first heating load are respectively connected to two ends of an input power source;

[0008] a second heating load, one end of the second heating load being connected to one end of the input power supply;

[0009] a heating load switch driving circuit, wherein the other end of the second heating load is connected to the other end of the input power supply through the heating load switch driving circuit;

[0010] An AC voltage step-down sampling circuit, wherein the AC voltage step-down sampling circuit is connected to an input power supply;

[0011] A controller is connected to the heating load switch drive circuit and the AC voltage step-down sampling circuit respectively, and is used to control the conduction of the second heating load through the heating load switch drive circuit when the input power supply voltage is a low voltage obtained by the AC voltage step-down sampling circuit.

[0012] Further, according to an embodiment of the present invention, the automatic mode switching steam garment steamer control circuit further includes:

[0013] A water pump, one end of which is connected to one end of the input power supply;

[0014] a first water pump switch driving circuit, wherein the other end of the water pump is connected to the other end of the input power supply through the first water pump switch driving circuit, and the control end of the first water pump switch driving circuit is connected to the controller, and is used to control the conduction of the water pump through the first water pump switch driving circuit when the input power supply voltage is a high voltage;

[0015] A second water pump switch drive circuit, the other end of the water pump is connected to the other end of the input power supply through the second water pump switch drive circuit, and the control end of the second water pump switch drive circuit is connected to the controller, and is used to control the conduction of the water pump through the second water pump switch drive circuit when the input power supply voltage is a low voltage.

[0016] Further, according to an embodiment of the present invention, the heating load switch driving circuit includes:

[0017] A transistor (Q4), wherein a base of the transistor (Q4) is connected to a control end of the controller via a first resistor (R14), and an emitter of the transistor (Q4) is connected to a reference ground;

[0018] A relay, wherein one magnetically controlled end of the relay is connected to the integrated electrode of the transistor (Q4), the other magnetically controlled end of the relay is connected to the power supply, one switch control end of the relay is connected to the other end of the input power supply, and the other switch control end of the relay is connected to the other end of the second heating load.

[0019] Further, according to an embodiment of the present invention, the AC voltage step-down sampling circuit includes:

[0020] A second resistor (R1), one end of the second resistor (R1) is connected to one end of the input power supply;

[0021] a capacitor (C4), one end of the capacitor (C4) being connected to the other end of the second resistor (R1), and the other end of the capacitor (C4) being connected to a reference ground;

[0022] A diode (D3), wherein an anode of the diode (D3) is connected to one end of the capacitor (C4), a cathode of the diode is connected to a power supply, and a common end of the diode (D3) and the capacitor (C4) is also connected to a first voltage sampling end of the controller.

[0023] Further, according to an embodiment of the present invention, the first heating load is a 220V voltage heating load, and the second heating load is a 120V voltage heating load.

[0024] Further, according to an embodiment of the present invention, the first water pump switch driving circuit includes:

[0025] a third resistor (RL), one end of the third resistor (RL) being connected to the other end of the water pump;

[0026] A first thyristor (Q1), wherein an anode of the first thyristor (Q1) is connected to the other end of the third resistor (RL), a cathode of the first thyristor (Q1) is connected to the other end of the input power supply, and a control electrode of the first thyristor (Q1) is connected to a control end of the controller via a fourth resistor (R16).

[0027] Further, according to an embodiment of the present invention, the second water pump switch driving circuit includes:

[0028] A second thyristor (Q2), wherein an anode of the second thyristor (Q2) is connected to the other end of the water pump, a cathode of the second thyristor (Q2) is connected to the other end of the input power supply, and a control electrode of the second thyristor (Q2) is connected to another control end of the controller via a fifth resistor (R17).

[0029] Further, according to an embodiment of the present invention, the automatic mode switching garment steamer control circuit further includes a constant temperature sensor, and the first heating load and the second heating load are respectively connected to one end of the input power supply through the constant temperature sensor.

[0030] Furthermore, according to one embodiment of the present invention, the automatic mode switching steam garment steamer control circuit also includes a DC step-down circuit, which is connected to the input power supply, the heating load switch drive circuit and the controller to provide a DC power supply to the heating load switch drive circuit and the controller after stepping down the input power supply into a stable DC power supply.

[0031] On the other hand, an embodiment of the present invention further provides an automatic mode switching garment steamer, comprising:

[0032] Steam ironing machine body;

[0033] The above-mentioned automatic mode switching control circuit of the steam garment steamer is arranged in the main body of the steam garment steamer.

[0034] The automatic mode switching steam hanging steamer control circuit provided by the embodiment of the present invention is connected to the two ends of the input power supply through the two ends of the first heating load respectively; one end of the second heating load is connected to one end of the input power supply; the other end of the second heating load is connected to the other end of the input power supply through the heating load switch driving circuit; the AC voltage step-down sampling circuit is connected to the input power supply; the controller is respectively connected to the heating load switch driving circuit and the AC voltage step-down sampling circuit, and is used to control the conduction of the second heating load through the heating load switch driving circuit when the input power supply voltage is obtained through the AC voltage step-down sampling circuit. In this way, when the steam hanging steamer is connected to a high voltage (such as 220V), heating is performed through the first heating load; and when the steam hanging steamer is connected to a low voltage (such as 120V), the second heating load is automatically incorporated and heated together with the first heating load. In this way, the voltage differences in different countries are adaptively adapted, so that the steam hanging steamer can be used across countries. Since the heating load can be automatically adapted according to the input power supply voltage, the heating requirements under various different voltage environments can be met, thereby achieving an ideal use effect and facilitating the use of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A structural block diagram of a control circuit for an automatic mode switching garment steamer provided by an embodiment of the present invention;

[0036] Figure 2 A structural block diagram of another automatic mode switching control circuit of a garment steamer provided by an embodiment of the present invention;

[0037] Figure 3 This is a structural diagram of the control circuit of the automatic mode switching garment steamer provided in an embodiment of the present invention.

[0038] Reference numerals:

[0039] A first heating load 10;

[0040] A second heating load 20;

[0041] Water pump 30;

[0042] Heating load switch driving circuit 40;

[0043] A first water pump switch driving circuit 50;

[0044] A second water pump switch driving circuit 60;

[0045] Controller 70;

[0046] AC voltage step-down sampling circuit 80;

[0047] AC-DC circuit 90;

[0048] Temperature sensor 11;

[0049] Indicator control circuit 12;

[0050] Power control switch 13;

[0051] Fuse 14.

[0052] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0053] In order to make those skilled in the art better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] On the one hand, see Figure 1, an embodiment of the present invention provides an automatic mode switching steam garment steamer control circuit, comprising: a first heating load 10, a second heating load 20, a heating load switch driving circuit 40, an AC voltage step-down sampling circuit 80 and a controller 70, wherein the two ends of the first heating load 10 are respectively connected to the two ends of the input power supply; Figure 1 As shown in , the first heating load 10 is a high voltage load. For example, it is a 220V high voltage load, by connecting the two ends of the first heating load 10 to the connection of the input power supply. The input power supply is AC mains. Since the two ends of the first heating load 10 are respectively connected to the two ends of the AC mains. Therefore, when the input power supply is 220V AC mains, only the first heating load 10 is heated and outputs the rated power.

[0056] One end of the second heating load 20 is connected to one end of the input power supply; when the input power supply is an AC low voltage, for example, a 120V voltage, at this time, since the first heating load 10 is not working at the rated power state and cannot output heat that meets the power requirement, it is necessary to incorporate the second heating load 20 to meet the overall power requirement.

[0057] The other end of the second heating load 20 is connected to the other end of the input power supply through the heating load switch driving circuit 40; the heating load switch driving circuit 40 is used to control whether the second heating load 20 is incorporated into the heating circuit. When the input power supply is 220V AC mains, the second heating load 20 does not need to be incorporated into the heating circuit, and when the input power supply is 120V AC mains, the second heating load 20 needs to be incorporated into the heating circuit.

[0058] The AC voltage step-down sampling circuit 80 is connected to the input power supply; the input power supply can be stepped down by the AC voltage step-down sampling circuit 80 and introduced into the controller 70. After sampling, the controller 70 can determine the voltage of the input power supply.

[0059] The controller 70 is connected to the heating load switch drive circuit 40 and the AC voltage step-down sampling circuit 80 respectively, and is used to control the conduction of the second heating load 20 through the heating load switch drive circuit 40 when the input power supply voltage is obtained through the AC voltage step-down sampling circuit 80 as a low voltage. After the controller 70 adopts the voltage of the input power supply that is stepped down and introduced through the AC voltage step-down sampling circuit 80, the actual voltage value of the input power supply can be obtained. When the controller 70 obtains that the voltage value of the input voltage is 220V high voltage, it is not necessary to incorporate the second heating load 20 into the heating circuit, and only the first heating load 10 needs to be heated to meet the heating requirements. When the controller 70 detects that the voltage value of the input voltage is 120V lower voltage, the second heating load 20 needs to be incorporated into the heating circuit, and the heating requirements can be met by heating the first heating load 10 and the second heating load 20 at the same time. At this time, the controller 70 connects the other end of the second heating load 20 to the input power supply by controlling the heating load switch drive circuit 40. In this way, the second heating load 20 is also heated.

[0060] The automatic mode switching steam garment steamer control circuit provided in the embodiment of the present invention is connected to the two ends of the input power supply through the two ends of the first heating load 10; one end of the second heating load 20 is connected to one end of the input power supply; the other end of the second heating load 20 is connected to the other end of the input power supply through the heating load switch driving circuit 40; the AC voltage step-down sampling circuit 80 is connected to the input power supply; the controller 70 is respectively connected to the heating load switch driving circuit 40 and the AC voltage step-down sampling circuit 80, and is used to control the conduction of the second heating load 20 through the heating load switch driving circuit 40 when the input power supply voltage is obtained through the AC voltage step-down sampling circuit 80 as a low voltage. In this way, when the steam garment steamer is connected to a high voltage (such as 220V), heating is performed through the first heating load 10; and when the steam garment steamer is connected to a low voltage (such as 120V), the second heating load 20 is automatically incorporated and heated together with the first heating load 10. In this way, the voltage differences in different countries are adaptively adapted, so that the steam garment steamer can be used across countries. Since the heating load can be automatically adapted according to the input power voltage, it can meet the heating requirements under various voltage environments, thereby achieving ideal use effects and facilitating user use.

[0061] See also Figure 2 The automatic mode switching steam hanging ironing machine control circuit also includes: a water pump 30, a first water pump switch driving circuit 50 and a second water pump switch driving circuit 60, one end of the water pump 30 is connected to one end of the input power supply; Figure 2 As shown in , by connecting one end of the water pump 30 to an input end of the input power supply, the water pump 30 is powered by the input power supply.

[0062] The other end of the water pump 30 is connected to the other end of the input power supply through the first water pump switch drive circuit 50, and the control end of the first water pump switch drive circuit 50 is connected to the controller 70, which is used to obtain the input power supply voltage as a high voltage, and control the conduction of the water pump 30 through the first water pump switch drive circuit 50; the connection between the other end of the water pump 30 and the other end of the input power supply is controlled by the first water pump switch drive circuit 50 to supply power to the water pump 30. In one embodiment of the present invention, the first water pump switch drive circuit 50 is provided with a resistor. When the controller 70 detects that the input power supply is a higher voltage (for example, 220V), the first water pump switch drive circuit 50 can be controlled to be turned on through the control end. After the water pump 30 is connected in series with the resistor on the first water pump switch drive circuit 50, it is connected to the two ends of the input power supply. The resistor on the first water pump switch drive circuit 50 limits the current and divides the higher voltage (such as 220V voltage) to prevent the water pump 30 in a lower voltage working state from being burned by the high voltage.

[0063] The other end of the water pump 30 is connected to the other end of the input power supply through the second water pump switch drive circuit 60, and the control end of the second water pump switch drive circuit 60 is connected to the controller 70, which is used to control the conduction of the water pump 30 through the second water pump switch drive circuit 60 when the input power voltage is low. In one embodiment of the present invention, when the controller 70 detects that the input power supply is a relatively low voltage (for example, 120V), the second water pump switch drive circuit 60 can be controlled to be turned on through the control end, and there is no series resistor on the water pump 30 and the first water pump switch drive circuit 50, so that the two ends of the water pump 30 are respectively connected to the two ends of the input power supply to power the water pump 30.

[0064] In the embodiment of the present invention, when the controller 70 detects that the input power supply voltage is a relatively high voltage (for example, 220V voltage), the first water pump switch driving circuit 50 can control the water pump 30 to be connected to the input power supply after connecting a resistor in series, so as to limit the current and divide the input relatively high voltage, and then power the water pump 30. When the controller 70 detects that the input power supply voltage is a relatively low voltage (for example, 120V voltage), the second water pump switch driving circuit 60 can control the water pump 30 to be directly connected to the input power supply, so as to power the water pump 30. In this way, the water pump 30 can work normally under different input voltage conditions, and the water pump 30 can be prevented from being burned out by high voltage or failing to work normally.

[0065] See also Figure 1 and Figure 3 The heating load switch driving circuit 40 includes: a transistor Q4 and a relay, the base of the transistor Q4 is connected to a control terminal of the controller 70 through a first resistor R14, and the emitter of the transistor Q4 is connected to the reference ground; Figure 3As shown in , the transistor Q4 is connected to a control terminal (terminal P7) of the controller 70 through the first resistor R14, so that the controller 70 can drive and control the transistor Q4.

[0066] A magnetic control end of the relay is connected to the integrated electrode of the transistor Q4, the other magnetic control end of the relay is connected to the power supply, a switch control end of the relay is connected to the other end of the input power supply, and the other switch control end of the relay is connected to the other end of the second heating load 20. The collector of the transistor Q4 is connected to the magnetic control end of the relay to control the on or off of the relay. Its working principle is specifically that when the controller 70 detects that the input power supply voltage is a lower voltage of 120V, a high-level voltage is output through a control end (P7 end) to turn on the transistor Q4. At this time, the control switch of the relay is closed, and the other end of the second heating load 20 is connected to the other end of the input power supply through the relay, and the second heating load 20 is heated in parallel with the first heating load. On the contrary, when the input power supply is a higher voltage power supply, a control end (P7 end) of the controller 70 outputs a low-level voltage, the transistor Q4 is turned off, the relay switch is disconnected, the second heating load 20 is disconnected from the other end of the power supply, and the second heating load 20 does not heat.

[0067] See also Figure 1 and Figure 3 , the AC voltage step-down sampling circuit 80 includes: a second resistor R1, a capacitor C4 and a diode D3, one end of the second resistor R1 is connected to one end of the input power supply; the second resistor R1 divides the input power supply and limits the current before inputting it to the controller 70, so as to perform voltage sampling through the controller 70. Specifically, the second resistor R1 can be set to two according to different resistance values, for example Figure 3 R1 and R2 in.

[0068] One end of the capacitor C4 is connected to the other end of the second resistor R1, and the other end of the capacitor C4 is connected to the reference ground; the input power introduced is filtered through the capacitor C4 to filter out interference signals.

[0069] The anode of the diode D3 is connected to one end of the capacitor C4, the cathode of the diode is connected to the power supply, and the common end of the diode D3 and the capacitor C4 is also connected to the first voltage sampling end of the controller 70. The diode D3 is connected to the power supply VCC to limit the introduced input power supply voltage, and the introduced input power supply voltage is connected to the sampling end (P13 end) of the controller 70 to sample the input power supply voltage and obtain the actual working voltage value of the input power supply.

[0070] See also Figure 1 and Figure 3 , the AC voltage step-down sampling circuit 80 further includes: a resistor R6 and a resistor R5, one end of the resistor R6 is connected to the voltage first sampling end of the controller 70;

[0071] One end of the resistor R5 is connected to one end of the resistor R6 , the other end of the resistor R5 is connected to the power supply, and the common end of the resistor R6 and the resistor R5 is also connected to the second voltage sampling end of the controller 70 .

[0072] See also Figure 2 and Figure 3 The first water pump switch driving circuit 50 includes: a third resistor RL and a first thyristor Q1, one end of the third resistor RL is connected to the other end of the water pump 30; as shown in 2, the third resistor RL is connected in series with the first thyristor Q1, so that when the input power supply is a higher voltage of 220V, the water pump 30 is powered after voltage division and current limiting, so as to prevent the water pump 30 from being burned by high voltage.

[0073] The anode of the first thyristor Q1 is connected to the other end of the third resistor RL, the cathode of the first thyristor Q1 is connected to the other end of the input power supply, and the control electrode of the first thyristor Q1 is connected to a control end of the controller 70 through the second resistor R14. The controlled end of the thyristor is connected to a control end (P5 end) of the controller 70 through the fourth resistor (R16), so that the controller 70 can control the conduction of the first thyristor Q1 to connect the water pump 30 and the third resistor RL in parallel to the two ends of the input power supply. The specific working principle is that when the controller 70 detects that the input power supply is a relatively high voltage input power supply of 220V, a control end (P5 end) of the controller 70 outputs a control signal. At this time, the first thyristor Q1 is turned on, the water pump 30 and the third resistor RL are connected to the two ends of the input power supply after being incorporated, and the water pump 30 works normally. On the contrary, when the controller 70 detects that the input power supply is a relatively low voltage (for example, 120V), there is no signal output from a control end (P5 end) of the controller 70, and the first thyristor Q1 is not turned on.

[0074] See also Figure 2 and Figure 3 The second water pump switch driving circuit 60 includes: a second thyristor Q2, the anode of the second thyristor Q2 is connected to the other end of the water pump 30, the cathode of the second thyristor Q2 is connected to the other end of the input power supply, and the control electrode of the second thyristor Q2 is connected to another control end of the controller 70 through a fifth resistor R17. Figure 3As shown in , the working principle of the second water pump switch driving circuit 60 is basically the same as that of the first water pump switch driving circuit 50. Specifically, when the controller 70 detects that the input power supply is a 120V lower voltage input power supply, another control terminal (P6 terminal) of the controller 70 outputs a control signal. At this time, the second thyristor Q2 is turned on, the water pump 30 is connected to both ends of the input power supply, and the input power supply is provided with a 120V power supply, and the water pump 30 works normally. On the contrary, when the controller 70 detects that the input power supply is a higher voltage (for example, 220V), another control terminal (P6 terminal) of the controller 70 has no signal output, and the second thyristor Q2 is not turned on.

[0075] See also Figure 3 The automatic mode switching steam garment steamer control circuit also includes a constant temperature sensor, and the first heating load 10 and the second heating load 20 are respectively connected to one end of the input power supply through the constant temperature sensor. The constant temperature sensor performs constant temperature power supply sensing. Since it is arranged directly between the first heating load 10 and the second heating load 20 and the input power supply, when it detects that the heating temperature is too high, the constant temperature sensor can disconnect the first heating load 10 and the second heating load 20 from the input power supply to avoid overheating.

[0076] See also Figure 3 The automatic mode switching steam garment steamer control circuit also includes a DC step-down circuit 90, which is connected to the input power supply, the heating load switch drive circuit 40 and the controller 70 to step down the input power supply into a stable DC power supply and provide a DC power supply to the heating load switch drive circuit 40 and the controller 70. Specifically, Figure 3 As shown in , the DC step-down circuit 90 includes a fuse 14, a varistor ZNR1, rectifier diodes DP1 and DP2, voltage-stabilizing filter capacitors CP1 and CP2, a voltage-stabilizing filter inductor and a voltage circuit. The DC power supply rectified and filtered by the fuse 14, the varistor ZNR1, the rectifier diodes DP1 and DP2, the voltage-stabilizing filter capacitors CP1 and CP2, and the voltage-stabilizing filter inductor is stepped down to a stabilized DC power supply 24V through the voltage chip U2, and each circuit component of the circuit is powered. In the embodiment of the present invention, the input power supply is converted into a stabilized DC power supply 24V through the DC step-down circuit 90, and each circuit component is powered uniformly. The power supply circuit is simple and practical, and does not require multiple and complex auxiliary power supplies. Reduce the complexity of the circuit.

[0077] On the other hand, an embodiment of the present invention further provides an automatic mode switching garment steamer, comprising: a garment steamer body and the above-mentioned automatic mode switching garment steamer control circuit, wherein the automatic mode switching garment steamer control circuit is arranged in the garment steamer body.

[0078] The automatic mode switching garment steamer provided in the embodiment of the present invention is arranged in the main body of the garment steamer through the automatic mode switching garment steamer control circuit. The automatic mode switching garment steamer control circuit can realize heating through the first heating load 10 when the garment steamer is connected to a high voltage (such as 220V); and when the garment steamer is connected to a low voltage (such as 120V), the second heating load 20 is automatically incorporated to heat together with the first heating load 10. In this way, the voltage difference between different countries is adaptively adapted, so that the garment steamer can be used across countries. Since the heating load can be automatically adapted according to the input power supply voltage, the heating requirements under various voltage environments can be met, thereby achieving an ideal use effect and facilitating the use of users.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An automatic mode switching steam garment ironing machine control circuit, characterized in that: include: A first heating load, wherein two ends of the first heating load are respectively connected to two ends of an input power source; a second heating load, one end of the second heating load being connected to one end of the input power supply; a heating load switch driving circuit, wherein the other end of the second heating load is connected to the other end of the input power supply through the heating load switch driving circuit; An AC voltage step-down sampling circuit, wherein the AC voltage step-down sampling circuit is connected to an input power supply; A controller, the controller being connected to the heating load switch drive circuit and the AC voltage step-down sampling circuit respectively, and being used for controlling the conduction of the second heating load through the heating load switch drive circuit when the input power supply voltage obtained by the AC voltage step-down sampling circuit is a low voltage; Wherein, the heating load switch driving circuit comprises: A transistor (Q4), wherein a base of the transistor (Q4) is connected to a control end of the controller via a first resistor (R14), and an emitter of the transistor (Q4) is connected to a reference ground; a relay, wherein one magnetic control end of the relay is connected to the integrated electrode of the transistor (Q4), the other magnetic control end of the relay is connected to the power supply, one switch control end of the relay is connected to the other end of the input power supply, and the other switch control end of the relay is connected to the other end of the second heating load; When the controller detects that the input power supply voltage is a relatively low voltage, a high-level voltage is outputted through a control terminal, so that the transistor (Q4) is turned on, the control switch of the relay is closed, and the other end of the second heating load is connected to the other end of the input power supply through the relay, and the second heating load is connected in parallel with the first heating load to generate heat; when the input power supply is a relatively high voltage power supply, a control terminal of the controller outputs a low-level voltage, so that the transistor (Q4) is turned off, the relay switch is opened, the other end of the second heating load is disconnected from the other end of the input power supply, and the second heating load does not generate heat.

2. The automatic mode switching steam garment steamer control circuit according to claim 1, characterized in that: Also includes: A water pump, one end of which is connected to one end of the input power supply; a first water pump switch driving circuit, wherein the other end of the water pump is connected to the other end of the input power supply through the first water pump switch driving circuit, and the control end of the first water pump switch driving circuit is connected to the controller, and is used to control the conduction of the water pump through the first water pump switch driving circuit when the input power supply voltage is a high voltage; A second water pump switch drive circuit, the other end of the water pump is connected to the other end of the input power supply through the second water pump switch drive circuit, and the control end of the second water pump switch drive circuit is connected to the controller, and is used to control the conduction of the water pump through the second water pump switch drive circuit when the input power supply voltage is a low voltage.

3. The automatic mode switching steam garment steamer control circuit according to claim 1, characterized in that: The AC voltage step-down sampling circuit comprises: A second resistor (R1), one end of the second resistor (R1) is connected to one end of the input power supply; a capacitor (C4), one end of the capacitor (C4) being connected to the other end of the second resistor (R1), and the other end of the capacitor (C4) being connected to a reference ground; A diode (D3), wherein an anode of the diode (D3) is connected to one end of the capacitor (C4), a cathode of the diode is connected to a power supply, and a common end of the diode (D3) and the capacitor (C4) is also connected to a first voltage sampling end of the controller.

4. The automatic mode switching steam garment steamer control circuit according to claim 1, characterized in that: The first heating load is a 220V voltage heating load, and the second heating load is a 120V voltage heating load.

5. The automatic mode switching steam garment steamer control circuit according to claim 2, characterized in that: The first water pump switch driving circuit comprises: a third resistor (RL), one end of the third resistor (RL) being connected to the other end of the water pump; A first thyristor (Q1), wherein an anode of the first thyristor (Q1) is connected to the other end of the third resistor (RL), a cathode of the first thyristor (Q1) is connected to the other end of the input power supply, and a control electrode of the first thyristor (Q1) is connected to a control end of the controller via a fourth resistor (R16).

6. The automatic mode switching steam garment steamer control circuit according to claim 5, characterized in that: The second water pump switch driving circuit comprises: A second thyristor (Q2), wherein an anode of the second thyristor (Q2) is connected to the other end of the water pump, a cathode of the second thyristor (Q2) is connected to the other end of the input power supply, and a control electrode of the second thyristor (Q2) is connected to another control end of the controller via a fifth resistor (R17).

7. The automatic mode switching steam garment steamer control circuit according to claim 1, characterized in that: It also includes a constant temperature sensor, and the first heating load and the second heating load are respectively connected to one end of the input power supply through the constant temperature sensor.

8. The automatic mode switching control circuit of a garment steamer according to claim 1, characterized in that: It also includes a DC step-down circuit, which is connected to the input power supply, the heating load switch drive circuit and the controller to provide a DC power supply to the heating load switch drive circuit and the controller after stepping down the input power supply into a stable DC power supply.

9. A steam garment steamer with automatic mode switching, characterized in that: include: Steam ironing machine body; The automatic mode switching control circuit of a garment steamer according to any one of claims 1 to 8, wherein the automatic mode switching control circuit of a garment steamer is arranged in the main body of the garment steamer.

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