Electric soldering iron device

Abstract

The invention relates to the technical field of welding, in particular to an electric soldering iron device which comprises a shell, a heating core and a soldering bit, the heating core is installed on the shell, the soldering bit is installed at one end of the shell, the heating core is connected with the soldering bit, and the electric soldering iron device further comprises an auxiliary heat structure which comprises a microwave signal emitting part installed on the soldering bit. The microwave signal transmitting part is used for auxiliary heating of a to-be-desoldered position; the auxiliary thermal structure further comprises an impedance matching circuit used for optimizing the microwave energy transmission efficiency. The microwave signal transmitting piece is of a dielectric resonator structure, and selective heating of welding spots with different metal components is achieved by adjusting the resonant frequency. By designing the auxiliary thermal structure, the to-be-desoldered position can be inductively heated across the air, electronic components on the surface are bypassed, the heating position is accurate, the efficiency is high, and thermal damage to other parts is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to an electric soldering iron device. BACKGROUND

[0002] With the continuous progress of electronic manufacturing process and the increasing demand for electronic component dismounting and welding precision, most of the existing electronic component dismounting and welding equipment adopts electric soldering iron contact heating, laser focusing heating or hot air gun heating for operation.

[0003] With the popularization of high-density packaging and system-in-package technology, the existing dismounting and welding equipment has the following problems in actual application.

[0004] Electric soldering iron contact heating conducts heat through physical contact, which cannot provide sufficient heat flux within a safe time for some integrated circuit chips with heat dissipation pads, easily leading to chip overheating and damage, and the actual heat conduction efficiency is insufficient.

[0005] Although laser focusing heating can achieve precise heating, it has high cost and high technical requirements for operators, and is limited by the spot size of the fiber laser, which cannot handle small size dismounting and welding operations, and has poor material compatibility, black plastic absorbs laser causing melting, and its single-point heating mode requires point-by-point scanning for dismounting and welding, which is low in efficiency for large-area dismounting and welding operations.

[0006] While the hot air gun heating can provide uniform heating of a large area, it is easy to cause unnecessary thermal damage to the surrounding sensitive components when processing precision electronic components, and has high energy consumption and cost due to the wide heating range. SUMMARY

[0007] The purpose of the present application is to overcome the shortcomings of the prior art, and provide an electric soldering iron device which can inductively heat the dismounting and welding position by designing an auxiliary heating structure, bypassing the surface electronic components, accurately heating the position, high efficiency, and avoiding thermal damage to other components.

[0008] To solve the above technical problems, the technical scheme adopted by the present application is: An electric soldering iron device, comprising a shell, a heating core and a soldering iron head, the heating core is installed in the shell, the soldering iron head is installed at one end of the shell, the heating core is connected with the soldering iron head, further comprising an auxiliary heating structure, the auxiliary heating structure comprises a microwave signal emitting element, the microwave signal emitting element is installed on the soldering iron head, and the microwave signal emitting element is used for auxiliary heating of the dismounting and welding position; the auxiliary heating structure further comprises an impedance matching circuit for optimizing the microwave energy transmission efficiency; the microwave signal emitting element adopts a dielectric resonator structure, and selective heating of different metal composition welding points is realized by adjusting the resonant frequency.

[0009] The electric soldering iron device of the present application realizes the space induction heating of the position to be disassembled and welded by the microwave signal emitting member, is compatible with the contact heating function of the traditional electric soldering iron, and takes into account low cost and high performance; the microwave can penetrate the non-metallic material and directly act on the metal components inside the welding point, greatly reducing the risk of thermal damage to the sensitive components, substrate materials and plastic structural components around the welding point during the heating process, avoiding component failure, plastic deformation or melting, and PCB bubble delamination; the microwave directly stimulates the movement of metal molecules to generate heat, and the heating speed is much faster than the traditional soldering iron head conducting heat from the outside to the inside of the welding point, and the effect is particularly significant for large welding points, large heat capacity welding points or good heat dissipation welding points; the microwave heating bypasses the limitation of the traditional soldering iron relying on good contact and heat conduction between the soldering iron head and the welding point surface, so that even if the contact of the soldering iron head is not ideal, the inside of the welding point can also be effectively heated, the overall time for disassembling and welding a single welding point or component is shortened, and the maintenance and repair efficiency is improved; the microwave can penetrate the PCB surface layer and directly heat the welding points in the inner layer buried hole, blind hole or under large components, since the heat is highly concentrated in the metal part of the target welding point, the heat transferred to the entire PCB board is greatly reduced, the risk of delamination and warping of the inner layer of the multi-layer board due to uneven heating is reduced, the success rate and safety of disassembly and welding on complex PCB boards are significantly improved, and since the target area is heated more concentratedly, the temperature rise of the surrounding area is small, the risk of thermal stress cracking of the welding point, pad, substrate or component itself due to different thermal expansion coefficients is reduced, and the reliability of the PCB and component after disassembly and welding is improved; in the case where the space is extremely small and the soldering iron head is difficult to penetrate or accurately contact the welding point, the microwave can bypass the obstacle and directly act on the template welding point; for the welding points in the gap of the pin-dense chip or component, the microwave can more accurately focus on the target, avoiding heating the adjacent pins or components; the microwave can quickly heat, cooperate with the soldering iron head, and improve the work efficiency.

[0010] Further, the auxiliary heating structure further comprises a microwave signal receiving member, the microwave signal receiving member is installed on the soldering iron head, and the microwave signal receiving member is used for receiving the microwave signal of the position to be disassembled and welded; the detection range of the microwave signal receiving member is 5-50mm, the detection accuracy reaches ±2°C, and the response time is not more than 100ms.

[0011] Further, the auxiliary heating structure further comprises a signal control member, the signal control member is installed in the shell, the microwave signal emitting member and the microwave signal receiving member are respectively in communication connection with the signal control member, the signal control member can receive and process the microwave signal, and feedback control is performed on the microwave signal emitting member and the microwave signal receiving member according to the microwave signal, the wavelength of the microwave and the detection temperature are controlled. The microwave signal receiving member can indirectly and in real time estimate the actual temperature inside the soldering point by capturing the reflected / projected microwave signal, analyzing the amplitude, phase or frequency spectrum change of the microwave signal and monitoring the thermal state of the soldering point in real time; the signal control member can automatically and in real time feed back the microwave emission power of the microwave signal emitting member and the temperature of the iron head according to the received signal, so that the soldering point is ensured to be always in the optimal temperature interval for dismounting and welding, overheat damage or insufficient heating is avoided, and the operation experience requirement of the operator is reduced. The microwave signal receiving member can calculate the actual microwave energy absorbed by the target soldering point by analyzing the reflected wave energy, and the signal control member can adjust the dismounting and welding parameters, so that the energy is efficiently absorbed for heating the soldering point, rather than being reflected and lost or heating the environment. The phase change process of the soldering tin from a solid state to a liquid state can cause a significant mutation of the characteristics of the microwave signal, the microwave signal receiving member can accurately capture the mutation position, and the operator is informed that this is the best time to apply mechanical force to separate the elements, so that the next operation is ensured to be performed after the soldering point is completely melted, and the operation success rate and reliability are greatly improved. In the embodiment, closed-loop intelligent heating can be realized, on the basis of ensuring accurate heating and avoiding thermal damage, temperature control, operation traceability and reliable results are further realized.

[0012] Further, the ceramic tube is sleeved on the soldering iron tip, and is arranged between the auxiliary heating structure and the soldering iron tip; the ceramic tube is made of alumina ceramic or silicon nitride ceramic, has a dielectric constant of 8-12 and a loss tangent of less than 0.001; the inner surface of the ceramic tube is provided with a heat-conducting coating, the heat-conducting coating is made of a metal oxide material, and has a thermal conductivity of not less than 20 W / m·K; the ceramic tube has a conical structure, and has a conical angle of 15°-45°, for forming a microwave focusing effect. The ceramic tube is used for isolating the auxiliary heating structure and the soldering iron tip, ensuring the working stability of the auxiliary heating structure, ensuring the reliability of microwave signal transmission, protecting the soldering iron tip from electromagnetic interference through physical isolation, and enhancing the high-temperature resistance of the whole device. The ceramic tube is nearly transparent to microwaves, and the microwaves can penetrate the ceramic tube to the welding point without loss, avoiding energy reflection loss; the ceramic tube can be designed to be conical, and cooperates with the microwave signal generating element to form a directional waveguide structure, so as to accurately focus the microwave energy on the welding point area, improving the heating efficiency. The low thermal conductivity of the ceramic tube forms a heat insulation layer on the surface of the soldering iron tip, reduces the lateral heat diffusion to the non-target area, and cooperates with the microwave penetration heating to make the heat more concentrated in the depth direction of the welding point; and the ceramic tube can maintain a relatively low temperature on the surface of the soldering iron tip, avoiding accidental scalding of the operator, and preventing high-temperature oxidation of surrounding elements. The surface of the ceramic tube is smooth and does not infiltrate the molten solder, reducing the adhesion of welding slag and reducing the cleaning frequency, and the ceramic tube can also resist flux vapor corrosion, prolonging the service life of the soldering iron tip.

[0013] Further, the microwave signal generating element includes an induction coil sleeved on the soldering iron tip, and the induction coil is used to generate a high-frequency magnetic field to realize electromagnetic induction heating; the induction coil is wound by Litz wire, has 5-20 turns, and has a wire diameter of 0.1-0.5 mm, for reducing high-frequency resistance loss; the induction coil is connected with current to quickly generate a high-frequency magnetic field, and heat is generated through electromagnetic induction, which is low in cost and convenient to control.

[0014] Further, the shell is provided with a plurality of heat dissipation holes, the number of the heat dissipation holes is 6-12, the diameter of the heat dissipation holes is 2-5 mm, the heat dissipation holes are distributed along the axial and radial directions of the shell, and the heat dissipation holes form natural convection heat dissipation channels, so that the device can be cooled, and the microwave signal generating element and the heating core can be prevented from overheating failure due to long-time work.

[0015] Further, the shell is provided with a display screen for displaying temperature and working state, which can display the current temperature or microwave signal strength in real time, and is convenient for users to monitor the working state.

[0016] Further, the soldering iron tip is installed on the heating core through threaded connection, and a sealing ring is arranged at the threaded connection, the sealing ring is made of high-temperature-resistant silicone rubber material, and has a working temperature range of -40°C to +300°C.

[0017] Further, the iron tip is installed on the heating core through a buckle connection; the buckle connection comprises elastic clamping jaws and locking grooves, the elastic clamping jaws have a self-locking function, and a release mechanism needs to be pressed when disassembling; the buckle connection further comprises an anti-loosening device, and the anti-loosening device comprises a torsion locking mechanism to prevent accidental falling during work.

[0018] Further, the contact surfaces of the heating core and the iron tip are coated with a heat-conducting material, the heat-conducting material is a heat-conducting silicone grease, a graphene heat-conducting film or a metal heat-conducting pad, the thermal conductivity is not less than 1 W / m·K, the working temperature range is -50°C to +800°C, the thickness of the heat-conducting material is 0.1-2mm, the coating uniformity reaches ±10%, the contact surface thermal resistance is less than 0.1°C·cm² / W, and the heat-conducting efficiency and high-temperature resistance can be further improved.

[0019] Compared with the background art, the present application has the following beneficial effects: (1) The microwave signal emitting element realizes non-contact heating of the position to be disassembled and welded, the microwave emitted by the microwave signal emitting element can act on the surface of the welding object to a depth of 1-2mm (the conventional PCB thickness range), the electronic components on the surface can be bypassed during heating, the heating position is accurate, and the thermal damage to other parts is avoided.

[0020] (2) The cooperation of the signal control element and the microwave signal receiving element realizes non-contact temperature detection of the position to be disassembled and welded. The signal control element feeds back and adjusts the electric iron device in real time, can dynamically control the microwave wavelength and the disassembly and welding temperature, and significantly improves the heating precision and efficiency.

[0021] (3) The ceramic tube is installed on the iron tip and is isolated from the auxiliary heating structure, which not only ensures the reliability of microwave signal transmission, but also protects the iron tip from electromagnetic interference through physical isolation, and enhances the high-temperature resistance of the whole device.

[0022] (4) The combination design of the inductor of the microwave signal emitting element and the heating core is compatible with the contact heating function of the traditional electric iron, realizes auxiliary heating through high-frequency electromagnetic induction, and takes into account low cost and high performance.

[0023] (5) The signal control element integrates control processing functions, automatically adjusts the output power and other parameters of the microwave signal emitting element through the feedback data of the microwave signal receiving element, realizes temperature control and state monitoring, and the display screen installed on the shell displays the temperature, microwave signal strength and working state and other related information in real time, which is convenient for users to intuitively monitor the operation process and improves the use safety and efficiency.

[0024] (6) The heat dissipation hole design effectively reduces the temperature accumulation of the microwave signal emitting member and the heating core during long-time work, avoids overheating failure, prolongs the service life of the equipment, and the iron tip is installed in the shell through a threaded or buckle connection mode, supports quick disassembly and replacement, and adapts to different specifications of operation requirements. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is a structure schematic view of the electric iron device of the embodiment of the present application. Fig. 2 It is a sectional view of the electric iron device of the embodiment of the present application. Fig. 3 It is an explosion view of the electric iron device of the embodiment of the present application.

[0026] Among them: 1 - shell; 2 - microwave signal receiving member; 3 - microwave signal emitting member; 4 - heating core; 5 - iron tip; 6 - ceramic tube; 7 - anti-skid sleeve. DETAILED DESCRIPTION

[0027] The present application will be further described below in conjunction with specific embodiments. Among them, the drawings are only used for exemplary description, and the representation is only a schematic diagram, and cannot be understood as a limitation on the present patent; in order to better illustrate the embodiments of the present application, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings may be omitted.

[0028] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connection", "connection", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] Example 1 like Figs. 1-3 As shown, a soldering iron device includes a housing 1, a heating element 4, a soldering tip 5, and an auxiliary heating structure. The heating element 4 is installed inside the housing 1. One end of the soldering tip 5 is connected to the heating element 4, and the other end extends out of the housing 1 for contacting the part to be desoldered during soldering. The auxiliary heating structure includes a microwave signal transmitter 3, a microwave signal receiver 2, and a signal control component (not shown in the attached figure). The microwave signal transmitter 3 and the microwave signal receiver 2 are installed on the soldering tip and are electrically connected to the signal control component. The microwave signal transmitter 3 emits microwaves, which assist in heating the part to be desoldered through the metal eddy current effect. The auxiliary heating of the part to be desoldered by the microwave signal transmitter 3 provides precise heating and convenient temperature control. The microwave signal receiver 2 receives microwave signals from the part to be desoldered. The microwave signal receiver 2 can receive, identify, and feed back microwave signals to the signal control component. The signal control component can receive and process the microwave signals transmitted by the microwave signal receiver 2, and perform feedback control on the microwave signal transmitter 3 and the microwave signal receiver 2 based on the microwave signals, controlling the microwave wavelength and detecting the temperature, etc.

[0032] Specifically, the microwave signal receiving member 2 monitors the thermal state of the solder joint in real time by capturing the reflected / transmitted microwave signal, analyzing the amplitude, phase or spectrum change thereof, and indirectly and real-timely estimating the actual temperature inside the solder joint; the signal control member automatically adjusts the microwave emission power of the microwave signal emitting member 3 and the temperature of the iron tip 5 in real time according to the feedback of the received signal, so as to ensure that the solder joint is always in the optimal temperature range for dismounting and welding, avoid overheating damage or insufficient heating, and reduce the operation experience requirement for the operator. The microwave signal receiving member 2 can calculate the actual microwave energy absorbed by the target solder joint by analyzing the reflected wave energy, and the signal control member can adjust the dismounting and welding parameters to ensure that the energy is efficiently absorbed for heating the solder joint, rather than being reflected and lost or heating the environment. The phase change process of the solder from solid to liquid will cause a significant mutation of the characteristics of the microwave signal, and the microwave signal receiving member 2 can accurately capture the mutation position to inform the operator that this is the best time to apply mechanical force to separate the elements, so as to ensure that the solder joint is completely melted before the next operation, greatly improving the operation success rate and reliability. In the embodiment, closed-loop intelligent heating can be realized, which further realizes temperature controllability, operation traceability and reliable results on the basis of ensuring accurate heating and avoiding thermal damage.

[0033] In the embodiment, the iron tip 5 is sleeved with a ceramic tube 6, the ceramic tube 6 is provided with a mounting cavity, the heating core 4 is mounted in the mounting cavity, the ceramic tube 6 can connect and conduct heat between the heating core 4 and the iron tip 5, and the auxiliary heating structure is sleeved on the outer surface of the ceramic tube 6, so as to isolate the auxiliary heating structure and the iron tip 5 and ensure the working stability of the auxiliary heating structure. The ceramic tube 6 is almost transparent to microwaves, and the microwaves can penetrate the ceramic tube 6 without damage to reach the solder joint, avoiding energy reflection loss; the ceramic tube 6 can be designed as a tapered shape to form a directional waveguide structure with the microwave signal emitting member 3, so as to accurately focus the microwave energy on the solder joint area and improve the heating efficiency. The low thermal conductivity of the ceramic tube 6 forms a heat insulation layer on the surface of the iron tip 5, reduces the lateral heat diffusion to the non-target area, cooperates with the microwave penetration heating, and makes the heat more concentrated in the depth direction of the solder joint; and the ceramic tube can maintain the surface temperature of the iron tip 5 at a relatively low temperature, avoid scalding the operator by mistake, and prevent high-temperature oxidation of the surrounding elements. The surface of the ceramic tube 6 is smooth and not infiltrated by molten solder, reducing the adhesion of solder dross and reducing the cleaning frequency, and the ceramic tube 6 can also resist corrosion by flux vapor and prolong the service life of the iron tip 5.

[0034] Further, the microwave signal emitter 3 is designed as an induction coil surrounding the outer surface of the ceramic tube 6 in this embodiment. The induction coil generates a high-frequency magnetic field after being electrified. Through electromagnetic induction, eddy current effect is generated at the metal parts of the position to be disassembled and welded, thereby heating the position to be disassembled and welded. When facing the integrated circuit with the heat dissipation gasket chip on the bottom, the microwave signal emitter 3 can bypass the shielding object of the components on the surface of the integrated circuit and directly heat the welding position. The microwave signal receiver 2 is installed on the ceramic tube 6 between the induction coil and the heating core 4. Through temperature measurement of the thermal radiation wavelength within a certain distance, accurate temperature measurement within the range of 10-30 mm can be achieved. When measuring the temperature, the components on the surface of the integrated circuit can be bypassed, and the welding position in the deep part can be directly measured, which is accurate and convenient.

[0035] In addition, the shell 1 is provided with a plurality of heat dissipation holes (not shown in the drawings) to dissipate heat and prevent the microwave signal emitter 3 and the heating core 4 from overheating due to long-time work.

[0036] The shell 1 is provided with a display screen (not shown in the drawings) for displaying temperature and working state. The display screen is electrically connected with the signal control member. The signal control member can transmit temperature, power and other related working parameters to the display screen to display the current temperature or microwave signal strength and other data in real time, thereby facilitating the user to monitor the working state.

[0037] The contact surfaces of the heating core 4 and the soldering iron tip 5 are coated with a heat-conducting material, which can further improve the heat conduction efficiency and high-temperature resistance of the soldering iron tip 5 and the heating core 4.

[0038] Embodiment Two In addition to the same parts as the above-mentioned embodiment one, in this embodiment, the soldering iron tip 5 is connected with the heating core 4 through threads. In addition, the soldering iron tip 5 can also be connected with the heating core 4 through a buckle connection. When maintenance is needed, the soldering iron tip 5 can be quickly installed or separated, thereby facilitating disassembly and maintenance.

[0039] Further, the shell 1 is provided with a silicone anti-slip sleeve 7 at the handle part, which can improve the stability of holding.

[0040] Embodiment Three In addition to the same parts as the above-mentioned embodiment one and embodiment two, in this embodiment, the signal control member is integrated with a micro control unit, and the display screen is a touchable display screen. When in use, the user can manually adjust the temperature at the display screen. At the same time, the signal control member supports automatic temperature feedback control, which can dynamically adjust the transmission power according to the data of the microwave signal receiver 2. In addition, a thermistor is arranged in the microwave signal receiver 2, which is electrically connected with the signal control member. When the temperature exceeds the preset threshold value, the power supply of the microwave signal emitter 3 is automatically cut off to prevent accidents caused by overheating.

[0041] The working process of the present application is as follows: in use, the power supply is started, the iron tip 5 is aligned with the position to be disassembled and welded, the microwave signal emitting member 3 emits a high-frequency magnetic field through the induction coil, and the position to be disassembled and welded is assisted in heating through the metal eddy current effect, in the heating process, the temperature of the position to be disassembled and welded is sensed by the microwave signal receiving member 2, the temperature is displayed in real time through the display screen, and the transmission power is adjusted correspondingly to realize precise control of welding.

[0042] In general, the present application realizes the non-contact temperature detection and the non-contact induction heating of the welding position through the cooperation of the microwave signal emitting member 3 and the microwave signal receiving member 2. The microwaves emitted by the microwave signal emitting member 3 can act on the surface of the welding object to a depth of 1-2 mm (the conventional PCB thickness range), and combined with the real-time feedback adjustment of the signal control member, the wavelength and temperature can be dynamically controlled, the heating precision and efficiency are significantly improved; the ceramic tube 6 is sleeved on the iron tip 5 and isolated from the auxiliary heating structure, which not only ensures the reliability of microwave signal transmission, but also protects the iron tip 5 from electromagnetic interference through physical isolation, and enhances the high-temperature resistance of the whole device; the combination design of the induction coil of the microwave signal emitting member 3 and the heating core 4 is compatible with the contact heating function of the traditional electric iron, and realizes auxiliary heating through high-frequency electromagnetic induction, which takes into account low cost and high performance; the signal control member integrates control processing functions, automatically adjusts the output power and other parameters of the microwave signal emitting member 3 through the feedback data of the microwave signal receiving member 2, realizes temperature control and state monitoring, and the display screen installed on the shell 1 displays the temperature, microwave signal strength and working state and other related information in real time, which is convenient for users to intuitively monitor the operation process and improves the use safety and efficiency; the heat dissipation holes effectively reduce the temperature accumulation of the microwave signal emitting member 3 and the heating core 4 during long-time work, avoid overheating failure, and prolong the service life of the equipment; the iron tip 5 is installed on the shell 1 through threaded or buckle connection, supports quick disassembly and replacement, adapts to different specifications of welding requirements, is easy to operate, and is low in cost.

[0043] In the specific content of the above specific embodiments, any technically feasible combination of technical features can be made, and in order to make the description concise, not all possible combinations of the above technical features are described, but as long as the combination of technical features does not exist, it should be considered as the scope of the present application.

[0044] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An electric soldering iron device comprising a housing (1), a heating core (4) and a soldering iron tip (5), the heating core (4) being mounted to the housing (1), the soldering iron tip (5) being mounted to one end of the housing (1), the heating core (4) being connected to the soldering iron tip (5), characterized in that, The auxiliary heating structure further comprises an impedance matching circuit for optimizing microwave energy transmission efficiency. The microwave signal emitter (3) adopts a dielectric resonator structure, and selective heating of welding points with different metal components is achieved by adjusting the resonant frequency. The auxiliary heating structure further comprises a microwave signal receiver (2) mounted on the soldering iron tip (5), which is used to receive microwave signals from the welding position to be removed.

2. An electrical soldering iron device according to claim 1, characterized in that The auxiliary heating structure further comprises a signal control member mounted on the shell (1), and the microwave signal emitter (3) and the microwave signal receiver (2) are respectively connected in communication with the signal control member.

3. An electrical iron device according to claim 2, characterized in that The auxiliary heating structure further comprises a ceramic tube (6) sleeved on the soldering iron tip (5), which is arranged between the auxiliary heating structure and the soldering iron tip (5).

4. An electrical iron device according to any one of claims 1-3, characterized in that The ceramic tube (6) is made of alumina ceramic or silicon nitride ceramic, with a dielectric constant of 8-12 and a loss tangent less than 0.

001. The inner surface of the ceramic tube (6) is provided with a heat-conducting coating made of metal oxide material with a thermal conductivity not less than 20 W / m·K. The ceramic tube (6) has a conical structure with a taper angle of 15°-45° for forming a microwave focusing effect. The microwave signal emitter (3) comprises an induction coil sleeved on the soldering iron tip (5), which is used to generate a high-frequency magnetic field to realize electromagnetic induction heating.

5. An electrical soldering iron device according to claim 1, characterized in that The induction coil is wound with Litz wire, with 5-20 turns and a wire diameter of 0.1-0.5 mm to reduce high-frequency resistance loss. The shell (1) is provided with a plurality of heat dissipation holes.

6. An electrical soldering iron device according to claim 1, characterized in that The number of heat dissipation holes is 6-12, with a diameter of 2-5 mm, distributed along the axial and radial directions of the shell (1) to form a natural convection heat dissipation channel. The shell (1) is provided with a display screen for displaying temperature and working state.

7. An electrical soldering iron device according to claim 1, characterized in that The soldering iron tip (5) is installed on the heating core (4) by threaded connection, and a sealing ring is arranged at the threaded connection, which is made of high-temperature resistant silicone rubber material with a working temperature range of -40°C to +300°C.

8. An electrical soldering iron device according to claim 1, characterized in that The soldering iron tip (5) is installed on the heating core (4) by snap connection.

9. An electrical soldering iron device according to claim 1, characterized in that The snap connection includes a spring claw and a locking groove, the spring claw has a self-locking function, and the release mechanism needs to be pressed when disassembling. The snap connection further comprises an anti-loosening device, which comprises a torsion locking mechanism to prevent accidental falling during work. The contact surfaces of the heating core (4) and the soldering iron tip (5) are coated with a heat-conducting material.

10. An electrical soldering iron device according to claim 1, characterized in that ​ The heat-conducting material is a heat-conducting silicone grease, a graphene heat-conducting film or a metal heat-conducting pad, and the thermal conductivity is not less than 1 W / m·K, and the working temperature range is -50°C to +800°C. The thickness of the heat-conducting material is 0.1-2 mm, the coating uniformity reaches ±10%, and the contact surface thermal resistance is less than 0.1°C·cm² / W.

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