Control circuit for the motor of a steam iron and steam iron

Abstract

The utility model provides a kind of control circuit and steam-ironing machine of motor of steam-ironing machine.The control circuit includes: motor, boiler control unit, motor drive unit, motor is connected with boiler control unit, boiler control unit is connected with motor drive unit, motor drive unit is connected with motor;Variable resistance is provided in boiler control unit;Motor drive unit is used to output voltage to motor based on the voltage of boiler control unit.The method is used to improve the speed and power of low-speed brush motor, thereby improving the adsorption effect of steam-ironing machine.

Description

Technical Field

[0001] This utility model relates to the field of vacuum steamers, and more particularly to a control circuit for the motor of a vacuum steamer and the vacuum steamer itself. Background Technology

[0002] A vacuum iron is an ironing device that uses negative pressure to hold the fabric in place while simultaneously removing residual heat and moisture during the ironing process. Because low-speed brushed motors have low rotation speed and low power, the vacuum level generated by vacuum irons based on low-speed brushed motors cannot meet the suction requirements of vacuum irons.

[0003] Therefore, there is an urgent need for a solution of a high-speed, high-power low-speed brushed motor to meet the usage requirements of the steaming machine. Utility Model Content

[0004] This utility model provides a control circuit for the motor of a vacuum steamer and a vacuum steamer, which improves the speed and power of the low-speed brushed motor, thereby improving the vacuum degree of the vacuum steamer and making the suction effect of the vacuum steamer better.

[0005] In a first aspect, the present invention provides a control circuit for the motor of a steaming machine, comprising: the control circuit comprising: a motor, a boiler control unit, and a motor drive unit, wherein the motor is connected to the boiler control unit, the boiler control unit is connected to the motor drive unit, and the motor drive unit is connected to the motor;

[0006] The boiler control unit is equipped with a variable resistor;

[0007] The motor drive unit is used to output voltage to the motor based on the voltage of the boiler control unit.

[0008] In one possible implementation, the boiler control unit includes a boiler drive module, a first resistor, and the variable resistor;

[0009] The boiler drive module is connected to the microcontroller, power supply, first terminal of the variable resistor, and first terminal of the first resistor in the steaming machine.

[0010] The second end of the variable resistor is connected to the motor, and the second end of the first resistor is grounded.

[0011] In one possible implementation, the boiler control unit further includes a first temperature control unit and a second temperature control unit; the second terminal of the variable resistor is connected to the first terminal of the first temperature control unit, and the second terminal of the first temperature control unit is connected to the motor; the second terminal of the first resistor is connected to the first terminal of the second temperature control unit, and the second terminal of the second temperature control unit is grounded;

[0012] The first temperature control unit is used to detect the first temperature signal of the variable resistor;

[0013] The second temperature control unit is used to detect the second temperature signal of the first resistor.

[0014] In one possible implementation, the motor drive unit is connected to the microcontroller in the steaming machine;

[0015] The motor drive unit is used to receive the PWM signal transmitted by the microcontroller, and to turn on and off the first transistor and the second transistor in the motor drive unit based on the PWM signal, so as to output a variable voltage to the motor.

[0016] In one possible implementation, the motor drive unit includes: a first drive module and a second drive module; a first end of the first drive module is connected to the boiler drive unit via a power supply; a second end of the first drive module is connected to the first end of the second drive module, and a second end of the second drive module is connected to the motor.

[0017] The third terminal of the first driving module is connected to the microcontroller; the second driving module is equipped with the first transistor and the second transistor;

[0018] The third terminal of the first driving module is used to receive the PWM signal transmitted by the microcontroller.

[0019] In one possible implementation, the first drive module includes a voltage regulation module, a drive amplification module, and a power switch control module;

[0020] One end of the voltage regulation module is connected to the boiler drive unit via a power supply; the other end of the voltage regulation module is connected to one end of the drive amplification module; the other end of the drive amplification module is connected to the first end of the power switch control module; the second end of the power switch control module is grounded; and the third end of the power switch control module is connected to the microcontroller.

[0021] The third terminal of the power switch control module is used to receive the PWM signal transmitted by the microcontroller.

[0022] In one possible implementation, the second driving module includes a second resistor, a third resistor, a first transistor, and a second transistor;

[0023] One end of the second resistor is connected to the first driving module, and the other end of the second resistor is connected to the first terminal of the first transistor and the first terminal of the second transistor, respectively.

[0024] The other end of the second resistor is connected to the second terminal of the first transistor and the second terminal of the second transistor respectively through the third resistor;

[0025] The third terminal of the first transistor and the third terminal of the second transistor are respectively connected to the motor.

[0026] In one possible implementation, the motor drive unit is provided with a current detection module, which is used to detect the current of the second drive module in the motor drive unit.

[0027] Secondly, this utility model provides a steaming machine, which is equipped with control circuits as described in the first aspect and / or various possible control circuits described in the first aspect.

[0028] In one possible implementation, the steaming machine also includes a microcontroller.

[0029] This invention provides a control circuit for the motor of a vacuum steamer and the steamer itself. By constructing a linked control architecture for the motor, boiler control unit, and motor drive unit, and introducing a variable resistor to achieve dynamic voltage adjustment, it achieves precise control of the motor power to meet the negative pressure adsorption requirements of the steam steamer. Specifically, in this control circuit, the boiler control unit adjusts the output voltage in real time through a built-in variable resistor, and the motor drive unit outputs a corresponding amplitude drive voltage to the motor based on this voltage signal. When the steam steamer needs to enhance adsorption force, the boiler control unit increases the output voltage by decreasing the resistance of the variable resistor, and the motor drive unit simultaneously applies a higher voltage to both ends of the motor; conversely, it decreases the voltage by increasing the resistance. Compared to traditional fixed-voltage drive schemes, this scheme uses dynamic voltage adjustment to match the motor power with the steaming conditions in real time. This avoids the problem of unstable fabric fixation caused by insufficient vacuum in low-power conditions and prevents energy waste during high-power operation, ultimately achieving dual optimization of the steam steamer's adsorption performance and energy efficiency. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 A schematic diagram of the control circuit of the motor of a vacuum iron provided in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of a boiler control unit provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the structure of a motor drive unit provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the structure of the first driving module provided in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the second driving module provided in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of a current detection module provided in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the structure of a vacuum iron provided in an embodiment of this application.

[0038] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0040] As a professional piece of equipment in the field of fabric ironing, the core function of a vacuum steamer is to stably fix the fabric through negative pressure adsorption technology, while efficiently removing residual heat and moisture generated during ironing to ensure the steaming effect and fabric quality. However, some current vacuum steamers use low-speed brushed motors as their power source, which has significant technical limitations. Because of the low speed and power level of low-speed brushed motors, the vacuum level they generate during operation is insufficient, failing to meet the minimum vacuum standard required for the steamer to adsorb the fabric. This deficiency in power performance directly affects the stability of the fabric fixation, potentially reducing steaming efficiency and finished product quality.

[0041] Therefore, this application provides a control circuit for the motor of a steaming machine and a steaming machine, which increases the speed and power of the low-speed brushed motor, thereby improving the vacuum degree of the steaming machine and making the suction effect of the steaming machine better.

[0042] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of the control circuit of the motor of a steam iron provided in an embodiment of this application, as shown below. Figure 1 As shown, the control circuit of the motor of the steaming machine provided in this application includes: a motor 101, a boiler control unit 102, and a motor drive unit 103. The motor 101 is connected to the boiler control unit 102, the boiler control unit 102 is connected to the motor drive unit 103, and the motor drive unit 103 is connected to the motor; a variable resistor 1021 is provided in the boiler control unit 102; the motor drive unit 103 is used to output voltage to the motor 101 based on the voltage of the boiler control unit 102.

[0044] For example, a vacuum iron is an electronic device that combines adsorption and steam generation functions. It is commonly used for garment care, where adsorption smooths the garment and steam is used for ironing. The motor 101 is the actuator, which can drive the fan to achieve adsorption or drive the water pump to generate steam. The boiler control unit 102 is the control core of the circuit, and it has a variable resistor 1021 inside for adjusting or setting the boiler's operating parameters. The motor drive unit 103 is a power amplifier module, which is responsible for driving the motor 101 to run according to the control signal.

[0045] The motor 101 is connected to the boiler control unit 102, the boiler control unit 102 is connected to the motor drive unit 103, and the motor drive unit 103 is connected to the motor 101.

[0046] For example, the motor 101 is connected to the boiler control unit 102, which means that the boiler control unit 102 can adjust the voltage across the motor 101; the boiler control unit 102 is connected to the motor drive unit 103, thereby transmitting control signals (such as voltage signals) to the drive unit; the motor drive unit 103 is ultimately connected to the motor 101 to form a closed-loop control.

[0047] The variable resistor 1021 in the boiler control unit 102 can adjust the voltage level output to the motor drive unit 103. Based on this voltage signal, the motor drive unit 103 generates an appropriate drive voltage or current output to the motor 101, thereby precisely controlling the speed or torque of the motor 101. For example, when the user adjusts the steam intensity of the suction steamer, the change in the variable resistor 1021 will change the voltage output of the boiler control unit 102, which in turn adjusts the power of the motor 101 through the motor drive unit 103, achieving smooth adjustment of the suction force or steam volume.

[0048] The motor 101 directly performs the mechanical actions of the vacuum steamer, such as generating airflow to absorb clothing or pumping water to generate steam. The boiler control unit 102 acts as an intelligent controller, enabling user input adjustability through a variable resistor 1021, and outputting a stable control voltage based on boiler status (such as temperature) to ensure system safety and efficiency. The motor drive unit 103 acts as a bridge, converting low-voltage control signals into high-voltage, high-current drive capability, protecting the motor 101 from overload damage, and improving response speed. Overall, this circuit design achieves integrated and controllable functions of the vacuum steamer, improving the user experience.

[0049] This application provides a control circuit for the motor of a vacuum cleaner. By constructing a linked control architecture involving the motor, boiler control unit, and motor drive unit, and introducing a variable resistor to achieve dynamic voltage adjustment, it achieves precise control of the motor power to meet the negative pressure adsorption requirements of the vacuum cleaner. Specifically, in this control circuit, the boiler control unit adjusts the output voltage in real time through a built-in variable resistor, and the motor drive unit outputs a corresponding amplitude drive voltage to the motor based on this voltage signal. When the vacuum cleaner needs to enhance adsorption, the boiler control unit increases the output voltage by decreasing the resistance of the variable resistor, and the motor drive unit simultaneously applies a higher voltage to both ends of the motor; conversely, it decreases the voltage by increasing the resistance. Compared to traditional fixed-voltage drive schemes, this scheme uses dynamic voltage adjustment to match the motor power with the vacuuming conditions in real time. This avoids the problem of unstable fabric fixation caused by insufficient vacuum in low-power conditions and prevents energy waste during high-power operation, ultimately achieving dual optimization of the vacuum cleaner's adsorption performance and energy efficiency.

[0050] Figure 2 This is a schematic diagram of the structure of a boiler control unit provided in an embodiment of this application, as shown below. Figure 2 As shown, the boiler control unit provided in this application includes: a boiler drive module 1022, a first resistor R1, a variable resistor R2, a first temperature control unit NTC1, and a second temperature control unit NTC2.

[0051] The boiler drive module 1022 is connected to the microcontroller, power supply, first terminal of variable resistor R2, and first terminal of first resistor R1 in the steaming machine; the second terminal of variable resistor R2 is connected to the motor, and the second terminal of first resistor R1 is grounded.

[0052] For example, the boiler drive module 1022 is an actuator, which can be understood as a high-power electronic switch. It directly receives instructions (such as "start heating" or "stop heating") from the main control chip (microcontroller) of the steamer and controls the current flowing to the boiler heating element. The first resistor R1 is a fixed-value resistor, which mainly works with the variable resistor R2 in the circuit to divide the voltage and limit the current, ensuring that the voltage signal on the variable resistor R2 is within a safe and controllable range.

[0053] The variable resistor R2 is a resistor whose resistance can be adjusted by the user (or program). In this circuit, its core function is load detection. By sensing changes in the current of the motor (possibly the motor driving the water pump), its resistance or the voltage across it will change accordingly, thus feeding back the motor's load status to the system.

[0054] The first temperature control unit NTC1 and the second temperature control unit NTC2 form a dual safety protection mechanism. The first temperature control unit NTC1 is typically a resettable mercury thermostat or bimetallic thermostat. When the boiler temperature exceeds a certain safety threshold (e.g., 130°C), it physically disconnects the circuit and stops heating; it automatically resets when the temperature drops. The second temperature control unit NTC2 is typically a one-time fuse-type thermostat (thermal fuse), serving as a last line of defense. If the temperature abnormally rises to an extremely dangerous level (e.g., 150°C) due to a malfunction and the first temperature control unit NTC1 also fails, it will permanently melt, completely cutting off the circuit and preventing an accident.

[0055] For example, the entire unit is built around the boiler drive module 1022. The boiler drive module 1022 has multiple connection points: one end connects to the microcontroller and power supply of the steamer, meaning it obtains logic control signals from the microcontroller and the energy required to drive the boiler from the power supply. Its other end connects to both the first terminal of the variable resistor R2 and the first terminal of the first resistor R1. The second terminal of the variable resistor R2 is directly connected to the motor, a crucial design feature that incorporates the motor's load status into the control loop. The second terminal of the first resistor R1 is directly grounded, forming a voltage divider circuit with the variable resistor R2. The first temperature control unit NTC1 and the second temperature control unit NTC2 are typically connected in series in the main power supply circuit of the boiler heating element, independent of this signal control circuit, to achieve hardware-level safety protection.

[0056] The second terminal of the variable resistor R2 is connected to the first terminal of the first temperature control unit NTC1, and the second terminal of the first temperature control unit NTC1 is connected to the motor; the second terminal of the first resistor R1 is connected to the first terminal of the second temperature control unit NTC2, and the second terminal of the second temperature control unit NTC2 is grounded; the first temperature control unit NTC1 is used to detect the first temperature signal of the variable resistor R2; the second temperature control unit NTC2 is used to detect the second temperature signal of the first resistor R1.

[0057] For example, if the motor experiences a stall or short circuit, the current flowing through the variable resistor R2 will increase dramatically, causing its temperature to rise rapidly. When the first temperature control unit NTC1 detects that the temperature of the variable resistor R2 exceeds its safety threshold (e.g., 90°C), it will physically disconnect it. This action directly cuts off the signal detection path to the motor, and the system will immediately detect the signal abnormality, thereby cutting off the power supply to the motor and preventing the variable resistor from burning out due to overheating.

[0058] If a circuit malfunction causes the first resistor R1 to overheat, the second temperature control unit NTC2 will disconnect. Its disconnection will cause the grounding loop of the entire detection circuit to fail, resulting in abnormal signal voltages acquired by the system, which in turn triggers the protection mechanism and stops the equipment from operating.

[0059] Figure 3 This is a schematic diagram of the structure of a motor drive unit provided in an embodiment of this application, as shown below. Figure 3 As shown, the motor drive unit 103 provided in this application includes: a first drive module 1031 and a second drive module 1032; the first end of the first drive module 1031 is connected to the boiler drive unit 102 via a power supply 104; the second end of the first drive module 1031 is connected to the first end of the second drive module 1032, and the second end of the second drive module 1032 is connected to the motor; the third end of the first drive module 1031 is connected to a microcontroller 105; a first transistor 10321 and a second transistor 10322 are provided in the second drive module 102; the third end of the first drive module 1031 is used to receive the PWM signal transmitted by the microcontroller 105.

[0060] Understandably, the motor drive unit 103 is connected to the microcontroller 105 in the steaming machine; the motor drive unit 103 is used to receive the PWM signal transmitted by the microcontroller 105, and to turn on and off the first transistor 10321 and the second transistor 10322 in the motor drive unit 103 based on the PWM signal, so as to output a variable voltage to the motor.

[0061] For example, a PWM signal is a pulse width modulation signal, which is a control method that adjusts the average value of the output signal by changing the width of the pulse signal. In this circuit, the change in the pulse width of the PWM signal can reflect different requirements for the motor drive. The motor drive unit 103 adjusts the voltage output to the motor according to the pulse width of the PWM signal, thereby controlling the motor's speed and other operating parameters.

[0062] A transistor is a semiconductor device that amplifies current and functions as a switch. In this circuit, the first transistor 10321 and the second transistor 10322 serve as key switching elements in the motor drive unit 103, and their on / off states are controlled by the motor drive unit 103 based on the received PWM signal. By properly controlling the on / off combination of these two transistors, the output voltage can be regulated, thereby meeting the needs of different motor operating states.

[0063] The connection between the motor drive unit 103 and the microcontroller 105 is usually an electrical connection, where the input terminal of the motor drive unit 103 is connected to the output terminal of the microcontroller 105 through specific pins or interfaces. This connection may be achieved by directly soldering wires to the corresponding pins, or by using connectors such as pin headers or female headers to ensure stable and reliable signal transmission.

[0064] As the control core, the microcontroller 105 needs to transmit control commands to the motor drive unit 103, while the motor drive unit 103 needs to receive these commands to drive the motor. Through this connection, the microcontroller 105 can accurately transmit the generated PWM signals and other control signals to the motor drive unit 103, providing the motor drive unit 103 with control basis so that it can accurately control the motor according to the preset program.

[0065] After receiving the PWM signal from the microcontroller 105, the motor drive unit 103 adjusts the input power supply by controlling the on / off states of the first transistor 10321 and the second transistor 10322 based on information such as the pulse width of the signal, and outputs a variable voltage to the motor. For example, when the pulse width of the PWM signal is large, the motor drive unit 103 may turn on the first transistor 10321 for a longer time and the second transistor 10322 for a shorter time, thereby outputting a higher voltage and accelerating the motor; conversely, when the pulse width is small, a lower voltage is output, and the motor decelerates. In this way, the motor drive unit 103 achieves precise control of the motor speed and other operating parameters, meeting the requirements of the steaming machine for motor operation in different working scenarios.

[0066] For example, the first drive module 1031 is an important component of the motor drive unit 103, undertaking the tasks of signal reception, preliminary processing, and connection with the power supply and other modules. It acts as the "front-end processor" of the motor drive unit 103, receiving control signals from the microcontroller 105 on the one hand, and interacting with the power supply and the second drive module 1032 on the other hand, preparing for the subsequent precise driving of the motor.

[0067] The second drive module 1032 is also a key module of the motor drive unit 103, and it contains a first transistor 10321 and a second transistor 10322. It is mainly responsible for further processing the signals and power transmitted from the first drive module 1031, and adjusting the voltage and current output to the motor by controlling the on and off states of the transistors, thereby achieving fine control of the motor's operating state.

[0068] The first end of the first drive module 1031 is connected to the power source via a power cable, and simultaneously establishes a connection with the boiler drive unit 102. This connection is typically achieved through wire soldering or the use of suitable electrical connectors to ensure a secure connection, good conductivity, and stable power transmission.

[0069] The power supply provides the necessary electrical energy to the entire motor drive unit 103, serving as the power source for the motor's operation. While the specific interaction function with the boiler drive unit 102 is not explicitly stated in this description, there may be a need for information exchange or collaborative work within the overall steaming machine system. For example, the operating status of the boiler drive unit 102 may affect the motor control strategy of the motor drive unit 103, or the operating status of the motor drive unit 103 may be fed back to the boiler drive unit 102 to ensure the stable operation of the entire steaming machine system. The first drive module 1031, acting as a connection hub, is responsible for receiving power from the power supply and may, to some extent, coordinate the relationship with the boiler drive unit 102.

[0070] The second end of the first drive module 1031 and the first end of the second drive module 1032 are connected by wires or other suitable electrical connection methods to ensure smooth transmission of signals and power.

[0071] The first drive module 1031 receives control information such as PWM signals from the microcontroller 105, performs preliminary processing and conversion on this information, and then transmits it to the second drive module 1032. Simultaneously, the first drive module 1031 also adjusts the power it receives from the power supply before transmitting it to the second drive module 1032, providing a basis for the second drive module 1032 to further drive the motor. The second drive module 1032 then precisely adjusts the voltage and current output to the motor by controlling the switching of its internal transistors based on the signals and power received from the first drive module 1031.

[0072] The second end of the second drive module 1032 is connected to the power input terminal of the motor via a wire. The specifications of the wire are selected according to the power and current requirements of the motor to ensure safe and stable power transmission.

[0073] The first transistor 10321 and the second transistor 10322 in the second drive module 1032 adjust the voltage output to the motor by combining their on / off states based on the signals received from the first drive module 1031 (mainly control information converted from PWM signals). For example, when the motor needs to accelerate, the switching combination of the transistors will increase the output voltage, providing greater power to the motor; when the motor needs to decelerate or stop, the output voltage will decrease or be cut off accordingly. In this way, the second drive module 1032 achieves precise control of the motor's operating state, enabling the motor to meet the needs of the steaming machine in different working scenarios.

[0074] The third terminal of the first driving module 1031 is connected to the corresponding pin of the microcontroller 105 via a data line. This connection is usually made by using connectors such as pin headers or female headers, or by directly soldering wires, to ensure that the signal can be transmitted accurately and stably.

[0075] The microcontroller 105 acts as the control core, generating control commands such as PWM signals based on the working status of the steaming machine and the preset program, and transmitting these signals to the first drive module 1031 through this connection. The first drive module 1031 receives these signals, performs preliminary processing and conversion, and prepares for subsequent motor drive. Through this connection, the microcontroller 105 can remotely control and precisely regulate the motor drive unit 103, enabling the entire steaming machine system to operate stably according to the preset program.

[0076] Figure 4 This is a schematic diagram of the structure of the first driving module provided in an embodiment of this application, as shown below. Figure 4 As shown, the first drive module 1031 provided in this application includes a voltage regulation module, a drive amplification module, and a power switch control module; wherein, one end of the voltage regulation module is connected to the boiler drive unit 102 through the power supply 104; the other end of the voltage regulation module is connected to the first end of the drive amplification module, the second end of the drive amplification module is connected to the first end of the power switch control module, the third end of the drive amplification module is connected to one end of the second drive module 1032, the second end of the power switch control module is grounded, and the third end of the power switch control module is connected to the microcontroller 105; the third end of the power switch control module is used to receive the PWM signal transmitted by the microcontroller 105.

[0077] For example, one end of the voltage regulation module is connected to the power source via a power cord, and simultaneously connected to the boiler drive unit. Typically, wire soldering or the use of suitable electrical connectors is employed to ensure a secure connection, good conductivity, and stable power transmission.

[0078] The power supply provides the raw electrical energy input to the entire first drive module. The voltage regulation module receives this potentially fluctuating power supply voltage, precisely adjusts and stabilizes it, eliminating voltage fluctuations and providing a stable and reliable voltage for the subsequent drive amplification module and power switch control module. This ensures the normal operation of these modules and prevents performance degradation or damage caused by voltage instability. Although the specific interaction function with the boiler drive unit is not explicitly stated in this section, there may be information exchange or collaborative work requirements within the overall steaming machine system. For example, the operating status of the boiler drive unit may affect the voltage regulation module's adjustment strategy.

[0079] The other end of the voltage regulation module is connected to the first end of the drive amplifier module via a wire to ensure smooth signal transmission.

[0080] After the voltage regulation module outputs a stable voltage, it transmits it to the drive amplification module. The drive amplification module receives this stable voltage signal and amplifies its power. Because the subsequent power switch control module requires a signal with sufficient energy to drive its internal switching elements, the amplification effect of the drive amplification module can improve the signal's driving capability, enabling the power switch control module to respond accurately and quickly to control commands, ensuring the stability and reliability of the entire driving process.

[0081] The second end of the drive amplifier module is connected to the first end of the power switch control module via a wire, and the third end of the drive amplifier module is connected to one end of the second drive module.

[0082] The drive amplifier module transmits the amplified signal to the power switch control module, providing it with a signal that has sufficient driving capability. Based on this signal and the PWM signal received from the microcontroller, the power switch control module precisely controls the opening and closing states of its internal switching elements, thereby adjusting the power output to the motor and achieving precise control over the motor's operation.

[0083] The second terminal of the power switch control module is grounded, usually by directly connecting it to the ground terminal of the circuit with a wire to ensure that the circuit has a stable reference potential; the third terminal is connected to the corresponding pin of the microcontroller through a data line, usually by using connectors such as pin headers or female headers, or by directly soldering wires to ensure accurate and stable signal transmission.

[0084] Grounding provides a stable potential reference for the power switch control module, enabling it to operate normally and accurately measure and control parameters such as voltage and current. After connecting to the microcontroller, the third terminal of the power switch control module receives the PWM signal transmitted by the microcontroller. The microcontroller generates the PWM signal based on the steamer's operating status and preset program. The power switch control module adjusts the opening and closing time and frequency of its internal switching elements based on the pulse width of this signal, thereby controlling the power output to the motor. This allows for precise adjustment of operating parameters such as motor speed and direction, meeting the needs of the steamer in different working scenarios.

[0085] Figure 5 This is a schematic diagram of the structure of the second driving module provided in an embodiment of this application, as shown below. Figure 5 As shown, the second drive module 1032 provided in this application includes a second resistor R3, a third resistor R4, a first transistor Q1, and a second transistor Q2; one end of the second resistor R3 is connected to the first drive module 1031, and the other end of the second resistor R3 is connected to the first terminal of the first transistor Q1 and the first terminal of the second transistor Q2 respectively; the other end of the second resistor R3 is connected to the second terminal of the first transistor Q1 and the second terminal of the second transistor Q2 respectively through the third resistor R4; the third terminal of the first transistor Q1 and the third terminal of the second transistor Q2 are respectively connected to the motor.

[0086] For example, one end of the second resistor R3 is connected to the output terminal of the first drive module via a wire, and the other end is connected to the first terminal (typically the base or gate) of the first transistor Q1 and the first terminal (also the base or gate) of the second transistor Q2 via wires. This connection method uses soldering or suitable electrical connectors to ensure a firm connection, good conductivity, and stable transmission of electrical signals.

[0087] The signal output from the first driving module, after passing through the second resistor R3, has its voltage and current adjusted to a certain extent. The second resistor R3 acts as a voltage divider and current limiter, providing appropriate bias voltages for the first transistor Q1 and the second transistor Q2, ensuring their bases (or gates) have suitable potentials and thus guaranteeing that the transistors operate under appropriate conditions. For example, when the signal voltage output from the first driving module is high, the second resistor R3 can reduce the voltage to a suitable range that the transistors can withstand, preventing excessive voltage from damaging them; simultaneously, by limiting the current magnitude, it prevents excessive current from flowing into the transistor's base (or gate), protecting the transistor's safety.

[0088] The other end of the second resistor R3 is connected to the second terminal (usually the collector or drain) of the first transistor Q1 and the second terminal of the second transistor Q2 via the third resistor R4. The connection method also employs wire bonding or electrical connectors to ensure smooth signal and current transmission.

[0089] The third resistor R4 and the second resistor R3 together form a voltage divider circuit, further adjusting the voltage at relevant nodes of the second transistor Q2 (and the first transistor Q1). By appropriately selecting the resistance values ​​of the second resistor R3 and the third resistor R4, the voltage difference between the base (or gate) and collector (or drain) of the second transistor Q2 can be precisely controlled, optimizing the operating state of the second transistor Q2 and enabling it to conduct and cut off more stably and reliably. At the same time, this voltage divider circuit also provides a certain degree of protection for the entire circuit, preventing damage to components due to excessive voltage or current.

[0090] The third terminal (usually the emitter or source) of the first transistor Q1 and the third terminal (also the emitter or source) of the second transistor Q2 are connected to the corresponding terminals of the motor via wires. When connecting, ensure that the wires are of sufficient specification to withstand the current flowing through the motor and that the connections are secure to avoid problems such as poor contact.

[0091] The first transistor Q1 and the second transistor Q2 act as switching elements, controlling the voltage and current across the motor by alternately turning them on and off. When the first transistor Q1 is on and the second transistor Q2 is off, the current flows through the motor along a specific path, causing it to rotate in one direction. When the first transistor Q1 is off and the second transistor Q2 is on, the current path changes, and the motor may rotate in the opposite direction or enter a braking state. By precisely controlling the on and off times of these two transistors and their combination, the motor speed can also be adjusted. For example, by changing the duty cycle of the PWM (Pulse Width Modulation) signal to control the transistor's on time, the average voltage across the motor can be adjusted, achieving stepless speed regulation and meeting the diverse needs of the steamer for different operating scenarios.

[0092] Figure 6 This is a schematic diagram of the structure of a current detection module provided in an embodiment of this application, as shown below. Figure 6 As shown, the motor drive unit of this application is provided with a current detection module, which is used to detect the current of the second drive module in the motor drive unit.

[0093] The current detection module is located on the motor drive unit. Specifically, it is connected in series with the second drive module in the motor's power supply circuit, or connected to the second drive module through a precision sampling resistor, to sense the current flowing through the second drive module. The output of the current detection module is connected to the main control microcontroller of the steamer.

[0094] The current detection module is used to detect the current of the second drive module in the motor drive unit. If the detected current exceeds a preset current value, the power supply will be disconnected to protect the circuit of the motor drive unit.

[0095] Figure 7 This is a schematic diagram of the structure of a steam iron provided in an embodiment of this application, as shown below. Figure 7 As shown, the steaming machine includes: a power supply, a motor, a boiler control unit, a motor drive unit, a microcontroller, an electromagnetic water pump control module, a zero-crossing detection module, a power button module, a motor start / pause module, a steam level adjustment module, a programming module, and a light connector module.

[0096] The steaming device provided in this application includes all possible structures described in the above embodiments.

[0097] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A control circuit for the motor of a steam iron, characterized in that, The control circuit includes: a motor, a boiler control unit, and a motor drive unit. The motor is connected to the boiler control unit, the boiler control unit is connected to the motor drive unit, and the motor drive unit is connected to the motor. The boiler control unit is equipped with a variable resistor; The motor drive unit is used to output voltage to the motor based on the voltage of the boiler control unit.

2. The control circuit according to claim 1, characterized in that, The boiler control unit includes a boiler drive module, a first resistor, and the variable resistor; The boiler drive module is connected to the microcontroller, power supply, first terminal of the variable resistor, and first terminal of the first resistor in the steaming machine. The second end of the variable resistor is connected to the motor, and the second end of the first resistor is grounded.

3. The control circuit according to claim 2, characterized in that, The boiler control unit further includes a first temperature control unit and a second temperature control unit; the second end of the variable resistor is connected to the first end of the first temperature control unit, and the second end of the first temperature control unit is connected to the motor; the second end of the first resistor is connected to the first end of the second temperature control unit, and the second end of the second temperature control unit is grounded. The first temperature control unit is used to detect the first temperature signal of the variable resistor; The second temperature control unit is used to detect the second temperature signal of the first resistor.

4. The control circuit according to claim 1, characterized in that, The motor drive unit is connected to the microcontroller in the steaming machine; The motor drive unit is used to receive the PWM signal transmitted by the microcontroller, and to turn on and off the first transistor and the second transistor in the motor drive unit based on the PWM signal, so as to output a variable voltage to the motor.

5. The control circuit according to claim 4, characterized in that, The motor drive unit includes: a first drive module and a second drive module; a first end of the first drive module is connected to the boiler drive unit via a power supply; a second end of the first drive module is connected to the first end of the second drive module, and a second end of the second drive module is connected to the motor. The third terminal of the first driving module is connected to the microcontroller; the second driving module is equipped with the first transistor and the second transistor; The third terminal of the first driving module is used to receive the PWM signal transmitted by the microcontroller.

6. The control circuit according to claim 5, characterized in that, The first drive module includes a voltage regulation module, a drive amplification module, and a power switch control module; Wherein, one end of the voltage regulation module is connected to the boiler drive unit via a power supply; the other end of the voltage regulation module is connected to the first end of the drive amplification module; the second end of the drive amplification module is connected to the first end of the power switch control module; the third end of the drive amplification module is connected to one end of the second drive module; the second end of the power switch control module is grounded; and the third end of the power switch control module is connected to the microcontroller. The third terminal of the power switch control module is used to receive the PWM signal transmitted by the microcontroller.

7. The control circuit according to claim 5, characterized in that, The second driving module includes a second resistor, a third resistor, a first transistor, and a second transistor; One end of the second resistor is connected to the first driving module, and the other end of the second resistor is connected to the first terminal of the first transistor and the first terminal of the second transistor, respectively. The other end of the second resistor is connected to the second terminal of the first transistor and the second terminal of the second transistor respectively through the third resistor; The third terminal of the first transistor and the third terminal of the second transistor are respectively connected to the motor.

8. The control circuit according to any one of claims 1-7, characterized in that, The motor drive unit is equipped with a current detection module, which is used to detect the current of the second drive module in the motor drive unit.

9. A suction iron, characterized in that, The heat pump is equipped with a control circuit as described in any one of claims 1-8.

10. The steaming machine according to claim 9, characterized in that, The steaming machine also includes a microcontroller.

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