CN112404638A - Formula high power density flatiron - Google Patents
Formula high power density flatiron Download PDFInfo
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- CN112404638A CN112404638A CN202011420340.1A CN202011420340A CN112404638A CN 112404638 A CN112404638 A CN 112404638A CN 202011420340 A CN202011420340 A CN 202011420340A CN 112404638 A CN112404638 A CN 112404638A
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- soldering iron
- temperature
- discharge
- power density
- high power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
- B23K3/0338—Constructional features of electric soldering irons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
Abstract
The invention relates to a soldering iron core, in particular to a high-power-density soldering iron. The soldering iron comprises a soldering iron head, wherein the tail part of the soldering iron head is arranged at the end part of an outer steel pipe, and a soldering iron core is arranged in the outer steel pipe; the rear end of the soldering bit is provided with a temperature measuring discharge hole, a temperature sensor and a ceramic tube are arranged in the temperature measuring discharge hole, a discharge needle is arranged in the ceramic tube, and the head of the discharge needle is inserted into the temperature measuring discharge hole through the center of the ceramic tube. The invention has the characteristics of high heating efficiency, compact structure, excellent temperature stability and the like.
Description
Technical Field
The invention relates to a soldering iron core, in particular to a high-power-density soldering iron.
Background
The electric soldering iron is a necessary tool in the electronic industry at present, has irreplaceable effect in development, production and maintenance, the improvement of the performance of the soldering iron can greatly improve the working efficiency, along with the electronization of power, the application of high-power modules is more and more, the value of the devices is high, when the conventional low-power soldering iron is used for soldering, the heating time can only be prolonged, and the devices are heated for a long time and are easy to be subjected to cold soldering or damage.
The existing soldering iron mainly comprises two main types of power generation hot wire heating type and induction heating type according to a heating mode:
the electric heating type soldering iron is limited by the electric heating power density, and the surface area of the electric heating wire of the high-power soldering iron needs to be large enough. Taking a 300W soldering iron as an example, the diameter of the soldering iron tip is usually over 35 mm, and when the operable space of a workpiece is limited, the operation is very inconvenient; the weight of the handle of the soldering iron is usually more than 500 g, and the handle is easy to fatigue after long-time operation.
The size and the weight of the induction heating type high-frequency soldering iron are reduced to a certain extent, during induction heating, the soldering iron head is self-heated under the action of eddy current and circulation under the action of a high-frequency magnetic field generated by a high-frequency induction coil, the working surface is far away from a heated part, and due to the limitation of the heat conduction capability of the soldering iron head material, the diameter of the soldering iron head needs to be increased when the power is further increased, so that the size reduction is limited.
The volume of the two existing types of soldering irons can not be reduced on the premise of increasing the output power.
Patent 95214195.7 discloses an emergency arc electric iron, which uses an ac discharge mode to discharge electricity between an electrode and a soldering iron tip to heat the soldering iron tip, and this design can generate the same heat on the soldering iron tip and the electrode, and the actually output heat is only the soldering iron tip, so the loss is large.
Disclosure of Invention
The invention aims to provide a small-size high-power-density soldering iron which can accurately control the temperature for soldering operation.
The purpose of the invention is realized by the following ways: a formula high power density flatiron, it includes the solder head, the tail of the solder head is mounted to the end of the outer steel pipe, the outer steel pipe embeds the solder core; the rear end of the soldering bit is provided with a temperature measuring discharge hole, a temperature sensor and a ceramic tube are arranged in the temperature measuring discharge hole, a discharge needle is arranged in the ceramic tube, and the head of the discharge needle is inserted into the temperature measuring discharge hole through the center of the ceramic tube.
As a further optimization of the scheme, the tail end of the outer steel pipe is provided with a quick-connection plug connected with a built-in socket of the soldering iron handle.
As a further optimization of the scheme, the negative end of the power supply of the quick-connection plug is connected to the tail part of the discharge needle through a lead; and positive and negative lines of the temperature sensor are respectively connected to the negative end of the temperature sensor of the quick-connection plug and the positive end of the temperature sensor.
As a further optimization of the scheme, a plurality of magnetic rings are sleeved outside the connection part of the discharge needle and the lead.
As a further optimization of the scheme, an insulating sleeve is sleeved outside the joint of the discharge needle and the lead.
As a further optimization of the scheme, the discharge needle is insulated from the soldering bit through the ceramic tube.
The invention relates to a high-power-density soldering iron which is heated by using direct current electric arc in a sealed space, adopts a temperature sensor structure which is very close to a heat source, and is internally provided with a shielding magnetic ring. Compared with the prior art, the method has the following advantages:
1. the heating efficiency is high. The invention uses direct current arc heating. When the soldering iron works, the negative electrode discharges electricity to the soldering iron, electrons bombard the soldering iron, the heat is mainly generated by the soldering iron, and the heat generated by the electrodes is less; meanwhile, the temperature of the soldering bit is directly raised, so that the heat transfer process of the insulating material is avoided, and the heat conducting property is good.
2. The structure is compact. The invention leads the discharge electrode to be deep into the soldering iron head, shortens the distance from the heating part to the working surface of the soldering iron head, reduces the thermal resistance, and can realize that larger thermal power is output through the working surface of the soldering iron on the smaller size.
3. Excellent temperature stability. The side design of the temperature sensor is adopted, so that the temperature sensor is close to the heating point of the soldering bit as much as possible, the temperature detection of the highest temperature point is realized, and the temperature overshoot is effectively avoided; meanwhile, the temperature detection point is very close to the working face of the soldering bit, so that the temperature drop of the working face of the soldering bit can be quickly detected, and the power of the driving part can be quickly supplemented.
4. And (3) designing a sealed discharge cavity. The external interference of the higher harmonic waves of the discharge is effectively inhibited; meanwhile, the sealed discharge cavity also avoids the harm of ozone caused by discharge to the environment.
5. The design of the shielding magnetic ring. Electromagnetic radiation of the discharge needle to the outside is attenuated, and the electromagnetic radiation transmitted to the outside by the discharge needle can be further strengthened by stringing a plurality of magnetic rings.
6. And (5) fast plugging design. The soldering iron head with different shapes can be quickly replaced under the condition of a host machine so as to realize compatibility with large welding spots or small welding spots.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic longitudinal sectional view of the present invention;
FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2;
FIG. 4 is a schematic view of the cross-sectional structure B-B of FIG. 2;
FIG. 5 is a block diagram of the circuit of the present invention;
FIG. 6 is a circuit diagram of the present invention.
Detailed Description
As shown in fig. 1-4, the soldering iron with high power density of the present invention comprises a soldering iron head 1, wherein the tail of the soldering iron head 1 is mounted at the end of an outer steel tube 7, and a soldering iron core is arranged in the outer steel tube 7; the rear end of the soldering bit 1 is provided with a temperature measuring discharge hole 102, a temperature sensor 2 and a ceramic tube 4 are installed in the temperature measuring discharge hole 102, a discharge needle 3 is arranged in the ceramic tube 4, and the discharge needle 3 is inserted into the temperature measuring discharge hole 102 of the soldering bit 1 through the ceramic tube 4.
The tail end of the outer steel pipe 7 is provided with a quick-connection plug 9 connected with a built-in socket of the soldering iron handle, and the quick-connection plug 9 is connected with the outer steel pipe 7 through a plastic piece 10.
The negative power end 903 of the quick plug 9 is connected to the tail of the discharge needle 3 through a lead 6; the positive and negative lines of the temperature sensor 2 are connected to the temperature sensor negative terminal 901 and the temperature sensor positive terminal 902 of the quick-connect plug 9, respectively.
And a plurality of magnetic rings 8 are sleeved outside the joints of the discharge needles 3 and the leads 6. An insulating sleeve 5 is sleeved outside the joint of the discharge needle 3 and the lead 6. The ceramic tube 4 is insulated from the discharge needle 3 arranged therein.
When the soldering iron starts to work, electrons emitted by the discharge needle 3 bombard the temperature measurement discharge hole 102 of the soldering iron head 1, the soldering iron head starts to heat up, the temperature sensor 2 detects the change of temperature, the temperature measurement discharge hole 102 of the soldering iron head 1 and the temperature sensor 2 are isolated from the discharge needle through the ceramic tube 4 and are in contact with the temperature measurement discharge hole 102 of the soldering iron head 1, the temperature change of the soldering iron head can be quickly responded, the measured temperature signal is set through an external control circuit, then the discharge needle is driven, and the temperature is stable.
When the working surface 101 of the soldering bit 1 is in contact with a workpiece, the heat is lost, the temperature of the soldering bit 1 is reduced, the temperature sensor 2 detects the temperature change, the output power is increased after the temperature change is set by an external control circuit, and the rapid temperature rise is realized.
The discharging process of the discharging needle 3 is completed in the temperature measuring discharging hole 102 of the soldering iron head 1, the soldering iron head 1 is connected with the outer steel tube 7 through the connecting position 103, the outer steel tube 7 is connected with the ground through an external circuit, the electromagnetic shielding of a discharging chamber is realized, the isolation from the external air is also realized, and the environment damage caused by ozone generated during discharging is avoided. When the discharge needles 3 are discharged, electromagnetic interference is generated to the outside through the external connecting wires 6 of the discharge needles 3, and the shielding magnetic rings 8 sleeved on the connecting wires 6 are used for attenuating the electromagnetic interference to the outside of the discharge needles, so that the electromagnetic interference is effectively inhibited from being transmitted to the outside through the wires.
As shown in fig. 5-6, the commercial power is rectified and then sent into the controllable high-frequency booster circuit, the temperature detected by the temperature sensor 2 is compared with the target temperature, after being calculated by the singlechip in the control circuit, the controllable booster circuit is controlled to output high voltage, after the high voltage passes through the rectifying circuit, the negative level is connected to the discharge needle 3 of the soldering iron core through the negative power end 903 of the quick connector 9 and the lead 6, the positive electrode is connected to the outer steel tube 7, after the power is on, the control part circularly detects the temperature of the temperature sensor at the period of 20ms, when the temperature of the temperature sensor 2 is lower than the set temperature value, the control circuit controls the booster circuit to be opened, the alternating-current high voltage is rectified by the rectifying circuit, then the temperature measuring discharge hole 102 of the soldering bit 1 is discharged by the release pin 3, the temperature of the soldering bit rises, when the temperature reaches the set temperature value, the control circuit closes the controllable voltage-rising circuit and stops supplying power to the outside.
Circuit part operation description:
220V from a power grid is accessed through J1, buffered by NTC1, enters a common mode filter circuit consisting of C1, T1, C2 and R, R5, enters a rectifier bridge D2, and is filtered by C4 to provide direct current voltage of about 320V for a power circuit.
V1 is an isolation auxiliary power supply circuit, the commercial power is connected to V1 after being filtered, the control and drive part is provided with direct current 12V voltage by V1, and 12V direct current power supply is used for reducing 12V voltage to 5V voltage through a DC-DC voltage reduction circuit consisting of U3, R23, C17, C13, D4, L1, R22, R24 and CE 1. 5V is reduced to 3.3V by a linear voltage reduction circuit consisting of V2, C15, C14 and C16, and the voltage of the 5V is supplied to the singlechip.
The signal amplification circuit of the temperature sensor 2 is composed of U2B, R13, R17, C9, C6, R20, R11, R15, and C10.
The working current detection circuit consists of U2A, R14, R18, C11, C7, R21, R12, R16 and C12.
A driving signal amplifying circuit is composed of U1, R7, R8 and C3, Q1 and Q2 are driven to be conducted in turn through R2 and T2, R4 and R10 are pull-down resistors of Q1 and Q2, Q1 and Q2 are guaranteed to be in an off state when no signal exists, D1 and R3 form a driving shaping circuit of Q1, and D3 and R9 form a driving shaping circuit of Q2.
The primary side of T3, L2, C18 and C5 form a resonant circuit together, and the secondary side of T3 forms a rectifying circuit (hereinafter referred to as a high-voltage rectifying circuit) through D5, D6, D7, D9, D11, D13, D14, D15, D16, D8, D10 and D12.
After the circuit is powered on, a signal from the temperature sensor 2 is amplified by the U2B and then is input into the singlechip. When the signal value amplified by the temperature sensor 2 is lower than a set value, the singlechip drives Q1 and Q2 to work through U1, the signal value is subjected to pressure boosting and high-voltage rectification through T3 and then is connected to 903 of the soldering iron core plug-in 9 in a negative mode, the positive electrode of the singlechip is connected with the external steel tube 7 of the soldering iron core, high voltage is discharged to the discharge hole 102 of the soldering iron head 1 through the discharge needle 3 arranged in the ceramic tube 4 in the discharge hole 102 of the soldering iron core 1, and the temperature of the soldering iron head rises. When the signal fed back by the temperature sensor 2 is the same as the set value, the singlechip controls the driving circuit to stop working; the single chip microcomputer circularly detects a feedback signal of the temperature sensor 2, controls the driving circuit to work, and finally maintains the stability of the temperature of the soldering bit.
When the working surface 101 of the soldering bit 1 is contacted with a workpiece and loses heat, the temperature sensor 2 detects temperature change, the value amplified by the temperature sensor 2 is input into the singlechip, the singlechip outputs driving power until the signal value amplified by the temperature sensor 2 is equal to a set value, and rapid temperature compensation is completed.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (6)
1. A formula high power density flatiron, it includes the soldering iron (1), the afterbody of soldering iron (1) is installed in the tip of the outer steel pipe (7), the outer steel pipe (7) embeds the iron core; the method is characterized in that:
the soldering iron is characterized in that a temperature measuring discharge hole (102) is formed in the rear end of the soldering iron head (1), a temperature sensor (2) and a ceramic tube (4) are installed in the temperature measuring discharge hole (102), a discharge needle (3) is arranged in the ceramic tube (4), and the head of the discharge needle (3) is inserted into the temperature measuring discharge hole (102).
2. A high power density soldering iron according to claim 1 wherein: and a quick-connection plug (9) connected with a built-in socket of the soldering iron handle is arranged at the tail end of the outer steel pipe (7).
3. A high power density soldering iron according to claim 2 wherein: the negative power terminal (903) of the quick plug (9) is connected to the tail of the discharge needle (3) through a lead (6); the positive and negative lines of the temperature sensor (2) are respectively connected to the negative end (901) and the positive end (902) of the temperature sensor of the quick plug (9); the positive end of the power supply is connected with the soldering iron head (1) through the outer steel pipe (7) and forms a discharge loop with the discharge needle (3).
4. A high power density soldering iron according to claim 1 wherein: the connection part of the discharge needle (3) and the lead (6) is sleeved with a plurality of magnetic rings (8).
5. A high power density soldering iron according to claim 1 wherein: an insulating sleeve (5) is sleeved outside the joint of the discharge needle (3) and the lead (6).
6. A high power density soldering iron according to claim 1 wherein: the discharge needle (3) is insulated from the temperature measuring discharge hole (102) of the soldering iron head 1 through the ceramic tube (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420340.1A CN112404638A (en) | 2020-12-08 | 2020-12-08 | Formula high power density flatiron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420340.1A CN112404638A (en) | 2020-12-08 | 2020-12-08 | Formula high power density flatiron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112404638A true CN112404638A (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011420340.1A Pending CN112404638A (en) | 2020-12-08 | 2020-12-08 | Formula high power density flatiron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112404638A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242156Y (en) * | 1995-06-09 | 1996-12-11 | 邓台添 | Electric arc soldering iron for emergency purpose |
| CN2398045Y (en) * | 1999-11-09 | 2000-09-27 | 邓台添 | Electronic iron |
| JP2002254168A (en) * | 2001-03-02 | 2002-09-10 | Nobuyuki Takemoto | Soldering iron |
| US20060022018A1 (en) * | 2002-11-26 | 2006-02-02 | Hakko Corporation | Soldering iron with replaceable tip |
| CN2834760Y (en) * | 2005-08-24 | 2006-11-08 | 深圳市安泰信电子有限公司 | Integrated welding head |
| CN109590569A (en) * | 2019-02-12 | 2019-04-09 | 陈五航 | A kind of high frequency directly-heated type electric iron |
-
2020
- 2020-12-08 CN CN202011420340.1A patent/CN112404638A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242156Y (en) * | 1995-06-09 | 1996-12-11 | 邓台添 | Electric arc soldering iron for emergency purpose |
| CN2398045Y (en) * | 1999-11-09 | 2000-09-27 | 邓台添 | Electronic iron |
| JP2002254168A (en) * | 2001-03-02 | 2002-09-10 | Nobuyuki Takemoto | Soldering iron |
| US20060022018A1 (en) * | 2002-11-26 | 2006-02-02 | Hakko Corporation | Soldering iron with replaceable tip |
| CN2834760Y (en) * | 2005-08-24 | 2006-11-08 | 深圳市安泰信电子有限公司 | Integrated welding head |
| CN109590569A (en) * | 2019-02-12 | 2019-04-09 | 陈五航 | A kind of high frequency directly-heated type electric iron |
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Application publication date: 20210226 |