Circuit for heating electric soldering iron
By optimizing the circuit design of the heating soldering iron and adopting transformer and output circuits, control circuits, and power rectification and filtering circuits, the high cost and high energy consumption problems caused by the complexity of traditional soldering iron circuits have been solved, achieving the goal of high efficiency and low power consumption, extending the life of the equipment and improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-13
AI Technical Summary
Traditional heating soldering irons have complex heating control circuits, which leads to high material costs, increased production and assembly costs, high failure rates, large energy losses, high electricity consumption, and are neither environmentally friendly nor economical.
The circuit employs an optimized design of transformer and output circuit, control circuit, and power rectification and filtering circuit, including a circuit composed of transformers T1 and T2, resistor R1, LED indicator LED1, switch K1, resistor R3, start-up diode D2, transistors Q1 and Q2, capacitor C1, etc., to achieve high-efficiency and low-power power conversion and control.
It achieves the goals of high efficiency and low power consumption, significantly reduces unnecessary energy loss, extends the service life of the equipment, and improves the user experience.
Smart Images
Figure CN223993741U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating soldering iron circuit technology, specifically a circuit for a heating soldering iron. Background Technology
[0002] A heating soldering iron circuit is a circuit used to rapidly heat the tip (i.e., the heating wire) of a soldering iron. In this specific technical solution...
[0003] However, the heating control circuit of traditional soldering irons is relatively complex and requires more electronic components, which not only increases material costs but also production and assembly costs. In addition, the complex circuit design not only increases costs but also leads to a higher failure rate and introduces unnecessary energy losses, such as resistance loss and low conversion efficiency. As a result, soldering irons consume more electricity when working, which is neither environmentally friendly nor economical. Utility Model Content
[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A circuit for a heating soldering iron includes:
[0007] The transformer and output circuit include transformers T1 and T2, resistor R1, heating wire, LED indicator LED1, and switch K1, which are used for voltage conversion and heating wire heating.
[0008] The control circuit includes a resistor R3, a start-up diode D2, transistors Q1 and Q2, resistors R4 and R5, a capacitor C1, and a resistor R2, which are used to control the switching state of the heating soldering iron circuit.
[0009] A power rectification and filtering circuit, comprising a rectifier bridge D1 and a filter capacitor C2, is used to convert AC power into DC power and perform filtering.
[0010] As a further embodiment of this invention: the output terminal of the rectifier bridge D1 is electrically connected to one end of the filter capacitor C2, the other end of the rectifier bridge D1 is grounded, and the positive terminal of the filter capacitor C2 is electrically connected to the anode of the start-up diode D2 through resistor R3.
[0011] As a further embodiment of this invention: the cathode of the starting diode D2 is electrically connected to the base of the transistor Q2, the emitters of both transistors Q1 and Q2 are connected to ground, and the collector of transistor Q1 is electrically connected to a primary winding of the transformer T1 through resistor R4.
[0012] As a further embodiment of this utility model: the secondary winding of the transformer T1 is electrically connected to the base of the transistor Q2 through a resistor R5, the collector of the transistor Q2 is electrically connected to the primary winding of the transformer T2 through a capacitor C1, one end of the LED indicator LED1 is electrically connected to one end of the switch K1 through a resistor R2, and the other end of the switch K1 is connected to ground.
[0013] As a further embodiment of this utility model: the secondary winding of the transformer T2 is electrically connected to the heating wire through a resistor R1, and the other end of the heating wire is electrically connected to one end of the LED indicator LED1.
[0014] As a further improvement of this utility model: the input terminal of the rectifier bridge D1 is connected to an AC220V power supply. The rectifier bridge D1 is of model MB10F and is used to convert AC power to DC power. The filter capacitor C2 has a capacitance of 3900 picofarads and a withstand voltage of 1200 volts. The resistor R3 has a resistance of 680 kΩ. The resistors R4 and R5 have a resistance of 2.2 ohms. The capacitor C1 has a capacitance of 0.047 microfarads and a withstand voltage of 630 volts.
[0015] As a further improvement of this utility model: the starting diode D2 is of type DB3, the transistors Q1 and Q2 are both of type 13003, the resistor R2 has a resistance of 1 kΩ, and the resistor R1 has a resistance of 2.2 Ω.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] 1. This utility model achieves the goal of high efficiency and low power consumption through optimized design of power rectification and filtering circuits, control circuits, transformers and output circuits. At the same time, due to the adoption of efficient power conversion and control strategies, unnecessary energy loss is significantly reduced, the service life of the equipment is extended, and the user experience is improved. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the circuit connection for a heating soldering iron.
[0019] Figure 2 This is a schematic diagram of a circuit used for a heating soldering iron.
[0020] Figure 3 This is a schematic diagram of the plug-in components of a circuit used for a heating soldering iron.
[0021] Figure 4 This is a circuit diagram showing the signal routing for a heating soldering iron.
[0022] In the diagram: 100, transformer and output circuit; 200, control circuit; 300, power supply rectification and filtering circuit. Detailed Implementation
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0026] Example
[0027] Please see Figure 1-4 This is an embodiment of the present invention, which provides a circuit for a heating soldering iron, comprising:
[0028] Transformer and output circuit 100, including transformers T1 and T2, resistor R1, heating wire, LED indicator LED1 and switch K1, are used for voltage conversion and heating wire heating.
[0029] The control circuit 200 includes a resistor R3, a start-up diode D2, transistors Q1 and Q2, resistors R4 and R5, a capacitor C1, and a resistor R2, and is used to control the switching state of the heating soldering iron circuit.
[0030] The power supply rectification and filtering circuit 300 includes a rectifier bridge D1 and a filter capacitor C2, which is used to convert AC power into DC power and perform filtering.
[0031] Specifically, the output terminal of rectifier bridge D1 is electrically connected to one end of filter capacitor C2, the other end of rectifier bridge D1 is grounded, and the positive terminal of filter capacitor C2 is electrically connected to the anode of startup diode D2 through resistor R3.
[0032] Furthermore, the connection design between the rectifier bridge D1 and the filter capacitor C2 ensures the purity of the DC power supply. The rectified voltage is filtered by the large-capacity, high-voltage filter capacitor C2 (3900pF / 1200V), effectively removing voltage fluctuations and noise components, providing a stable and smooth DC power supply for subsequent circuits. This design not only improves the stability of the entire circuit but also extends the service life of each component.
[0033] Specifically, the cathode of the starting diode D2 is electrically connected to the base of the transistor Q2, the emitters of both transistors Q1 and Q2 are connected to ground, and the collector of transistor Q1 is electrically connected to one of the primary windings of transformer T1 through resistor R4.
[0034] Furthermore, the starting diode D2 serves as the starting element, and its direct connection between the cathode and the base of transistor Q2 simplifies the design of the control circuit. In the initial stage of circuit startup, D2 helps Q2 quickly enter the conduction state, enabling the push-pull circuit to respond quickly and operate stably. In addition, resistors R4 and R5 are used for voltage division to precisely adjust the operating point of the transistor, ensuring stable output even when the load changes.
[0035] Specifically, the secondary winding of transformer T1 is electrically connected to the base of transistor Q2 through resistor R5, the collector of transistor Q2 is electrically connected to the primary winding of transformer T2 through capacitor C1, one end of LED indicator LED1 is electrically connected to one end of switch K1 through resistor R2, and the other end of switch K1 is connected to ground.
[0036] Furthermore, the primary windings of transformers T1 and T2 are connected to the collector of transistor Q2 via capacitor C1, achieving efficient voltage conversion and energy transfer. The design of T1 and T2 is based on a small magnetic ring, which can achieve efficient voltage conversion while ensuring a compact size, meeting the voltage requirements of the heating wire. Capacitor C1 plays a key role in this process, not only helping to filter out voltage fluctuations, but also improving the overall efficiency of the circuit.
[0037] Specifically, the secondary winding of transformer T2 is electrically connected to the heating wire through resistor R1, and the other end of the heating wire is electrically connected to one end of LED indicator LED1.
[0038] Furthermore, one end of the LED indicator LED1 is connected to one end of the switch K1 through resistor R2 and finally grounded, forming a complete indicator circuit. When the circuit is closed, the current flows through the heating wire and heats it, which also lights up the LED indicator, intuitively displaying the working status of the device. The design is simple and practical, increasing the user's ease of operation and safety.
[0039] Specifically, the input terminal of rectifier bridge D1 is connected to AC220V power supply. Rectifier bridge D1 is model MB10F and is used to convert AC to DC. The filter capacitor C2 has a capacitance of 3900 picofarads and a voltage rating of 1200 volts. The resistor R3 has a resistance of 680 kΩ. The resistors R4 and R5 have a resistance of 2.2 ohms. The capacitor C1 has a capacitance of 0.047 microfarads and a voltage rating of 630 volts. The starting diode D2 is model DB3. Transistors Q1 and Q2 are both model 13003. The resistor R2 has a resistance of 1 kΩ and the resistor R1 has a resistance of 2.2 ohms.
[0040] Furthermore, the use of the MB10F rectifier bridge makes the conversion from AC220V AC power to DC power more reliable and stable, reducing the risk of damage to subsequent components. At the same time, the selection of filter capacitor C2 (3900pF / 1200V) is based on its high withstand voltage and appropriate capacitance, which can effectively remove voltage fluctuations while avoiding capacitor damage caused by excessive reverse voltage. In addition, resistors R4 and R5 (2.2Ω) are used for voltage division to help accurately control the operating points of transistors Q1 and Q2, ensuring stable output power even under load changes. The selection of transistors Q1 and Q2 (model 13003) is based on their high current gain and good thermal stability, which makes them perform well in the control circuit, effectively managing the current flow to transformers T1 and T2, thereby achieving precise heating of the heating wire.
[0041] In use, first connect the AC 220V power supply to the input terminal of rectifier bridge D1. Rectifier bridge D1 (MB10F model) is responsible for converting AC to DC and ensuring the stability of the circuit during startup and under abnormal conditions through its high current and voltage withstand capabilities. The converted DC is further purified by filter capacitor C2 (3900pF / 1200V) to effectively remove voltage fluctuations and noise components, providing a stable and smooth DC power supply to the subsequent circuits. When switch K1 is closed, control circuit 200 starts to work, and resistor R3 (6 An 80KΩ resistor is used as a current-limiting resistor to limit the current flowing through the start-up diode D2 (DB3), preventing excessive current from directly impacting transistor Q2 and protecting the circuit's safety and stability. The start-up diode D2 helps transistor Q2 quickly enter the conduction state, enabling the push-pull circuit composed of transistors Q1 and Q2 (model 13003) to respond quickly and operate stably. Resistors R4 and R5 (2.2Ω) are used for voltage division, precisely adjusting the transistor's operating point to ensure stable output power even under varying load conditions. One primary winding of transformer T1... The primary winding of transformer T1 is connected to the collector of transistor Q1 via resistor R4, while the secondary winding of transformer T1 is connected to the base of transistor Q2 via resistor R5. The collector of transistor Q2 is connected to the primary winding of transformer T2 via capacitor C1 (0.047μF / 630V), achieving efficient voltage conversion and energy transfer. The secondary winding of transformer T2 is connected to the heating wire via resistor R1 (2.2Ω), and the other end of the heating wire is connected to one end of LED indicator LED1. Resistor R1 is used to limit the current flowing to the heating wire, ensuring both rapid heating of the heating wire and... To avoid damage or safety hazards caused by overheating, when the circuit is working normally, the current will pass through the heating wire and simultaneously light up the LED indicator, which will intuitively display the working status of the device, increasing the user's ease of operation and safety. Resistor R2 (1KΩ) acts as a current-limiting resistor to protect the LED indicator from damage caused by excessive current. During the process, the user can observe the status of the LED indicator to determine whether the soldering iron is working normally. If the LED indicator is lit, it means that the circuit has been successfully closed and power supply has started to heat up. If it is not lit, it means that there may be a fault in the circuit or that switch K1 is not closed.
[0042] In summary, by optimizing the design of the power rectification and filtering circuit 300, the control circuit 200, and the transformer and output circuit 100, the goals of high efficiency and low power consumption are achieved. At the same time, due to the adoption of efficient power conversion and control strategies, unnecessary energy loss is significantly reduced, the service life of the equipment is extended, and the user experience is improved.
[0043] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0044] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.
[0045] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.
[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A circuit for a heat generating electric iron, characterized in that: The utility model relates to a kind of electric hot iron circuit, including: Transformer and output circuit (100), the transformer and output circuit (100) include transformer T1 and T2, resistance R1, heating wire, LED indicator light LED1 and switch K1, for voltage transformation and heating wire heating; Control circuit (200), the control circuit (200) includes resistance R3, starting diode D2, triode Q1 and Q2, resistance R4 and R5, capacitor C1 and resistance R2, for controlling the switch state of heating electric hot iron circuit; Power supply rectification and filter circuit (300), the power supply rectification and filter circuit (300) include rectifier bridge D1 and filter capacitor C2, for converting alternating current into direct current, and carry out filtering processing.
2. A circuit for a heat generating soldering iron as claimed in claim 1, characterized in that: The output end of the rectifier bridge D1 is electrically connected with one end of the filter capacitor C2, the other end of the rectifier bridge D1 is grounded, and the positive electrode end of the filter capacitor C2 is electrically connected with the anode of the starting diode D2 through the resistance R3.
3. The circuit for a heat generating soldering iron according to claim 1, wherein: The cathode of the starting diode D2 is electrically connected with the base of the triode Q2, the emitter of the triode Q1 and Q2 is connected to ground, and the collector of the triode Q1 is electrically connected with one primary winding of the transformer T1 through the resistance R4.
4. The circuit for a heat generating soldering iron according to claim 1, wherein: The secondary winding of the transformer T1 is electrically connected with the base of the triode Q2 through the resistance R5, the collector of the triode Q2 is electrically connected with the primary winding of the transformer T2 through the capacitor C1, one end of the LED indicator light LED1 is electrically connected with one end of the switch K1 through the resistance R2, and the other end of the switch K1 is connected to ground.
5. The circuit for a heat generating soldering iron according to claim 1, wherein: The secondary winding of the transformer T2 is electrically connected with the heating wire through the resistance R1, and the other end of the heating wire is electrically connected with one end of the LED indicator light LED1.
6. The circuit for a heat generating soldering iron according to claim 1, wherein: The input end of the rectifier bridge D1 is connected to AC power supply AC220V, the rectifier bridge D1 adopts MB10F model, for converting alternating current into direct current, the filter capacitor C2 has a capacitance of 3900 picofarad and a withstand voltage of 1200 volts, the resistance R3 has a resistance of 680 kiloohms, the resistances R4 and R5 have a resistance of 2.2 ohms, the capacitor C1 has a capacitance of 0.047 microfarad and a withstand voltage of 630 volts.
7. The circuit for a heat generating soldering iron according to claim 1, wherein: The starting diode D2 is of DB3 model, the triodes Q1 and Q2 are of 13003 model, and the resistance R2 has a resistance of 1 kiloohm, and the resistance R1 has a resistance of 2.2 ohms.