CN2199835Y - Quick-heating electric iron - Google Patents
Quick-heating electric iron Download PDFInfo
- Publication number
- CN2199835Y CN2199835Y CN 94213790 CN94213790U CN2199835Y CN 2199835 Y CN2199835 Y CN 2199835Y CN 94213790 CN94213790 CN 94213790 CN 94213790 U CN94213790 U CN 94213790U CN 2199835 Y CN2199835 Y CN 2199835Y
- Authority
- CN
- China
- Prior art keywords
- transistor
- coil
- current
- frequency changer
- inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 title description 9
- 238000005476 soldering Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 3
- 239000010959 steel Substances 0.000 claims abstract description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 17
- 229910000679 solder Inorganic materials 0.000 description 15
- 230000005291 magnetic effect Effects 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- General Induction Heating (AREA)
Abstract
The utility model discloses a fast hot electric iron for welding, it comprises casing, switch, frequency converter and the "V" shape soldering iron that links to each other with the frequency converter output, and this frequency converter produces the oscillation through a pair of transistor and the pulse transformer that establish, and it generates heat to convert commercial power or direct current to the frequency for the frequency is kilohertz to tens of kilohertz's pulse alternating current provides the soldering iron that inlays the steel wire. The utility model has the advantages of small volume, light weight, high efficiency, convenient use and the like, and can work continuously.
Description
The utility model relates to a kind of electrician's instrument that utilizes the electric energy heating to weld, particularly a kind of fast thermoelectric flatiron for the radio component welding.
The fast thermoelectric flatiron that generally uses both at home and abroad adopts the power frequency supply transformer principle to make at present, and " simple and clear practical eelctrical engineering handbook " fast thermoelectric flatiron of power frequency formula that P542 introduced of publishing as Shanghai science tech publishing house is exactly a kind of example.The fast thermoelectric flatiron of this class power frequency formula structurally comprises a power transformer, go here and there on transformer switch and and form in " V " at transformer secondary output coil two ends type soldering iron head, secondary coil adopts that the cross section is big, the less copper conductor of the number of turn, and the copper cash of " V " type soldering iron head about with φ 1mm bends and form.When Closing Switch is connected civil power, the variation magnetic flux that is produced by primary coil is coupled, make several the peace to tens amperes electric current of secondary coil loop induction that is connected with solder horn, it is that the solder horn at several ohm of zero points generates heat rapidly that powerful electric current makes resistance, promptly reaches welding temperature in a few times in second.Have energy-saving effect, use more convenient.Yet power transformer is that core section is big by 50 hertz of work frequency designs, and coil turn is many, and copper loss is big, and whole fast thermoelectric flatiron massiveness can not be handy during use.In addition, the fast thermoelectric flatiron of this class can not be directly at direct current, as battery work down.
The purpose of this utility model provides little, in light weight, the fast more easily thermoelectric flatiron of working of a kind of volume.
For achieving the above object, the utility model is established a frequency changer in its housing, the output two ends of this frequency changer are in parallel with " V " type soldering iron head, thereby when inserting civil power or direct current, this frequency changer vibrates, and be kilo hertz to give " V " type soldering iron head that links to each other with output to tens of kilo hertzs action of low-voltage pulse alternating current from the output output frequency, making it in connection about time in second of power supply, solder horn just reaches welding temperature.
Above-mentioned frequency changer can have two kinds of versions: a kind of rectifier and inverter of comprising formed, and is applicable to that civil power is the frequency changer of input power supply; Another kind only is made of inverter, is applicable to the direct current to be to import power supply.Described inverter comprises a pulse transformer, and its structure can be self-excitation type semibridge system or full-bridge type, also can be the push-pull circuit of self-excitation type.
The utility model is owing to having adopted above circuit structure, so following advantage is arranged:
(1) because frequency changer can be transformed into extremely tens of kilo hertzs pulse ac of kilohertz by vibration with civil power or galvanic frequency, the raising of frequency, make the Pulse Transformer Iron Core cross section and on coil turn greatly reduce, both alleviated weight, dwindled volume again, per sample compared with the prior art, the fast thermoelectric flatiron weight of the utility model only is 200 grams, volume is 126 cubic centimetres, respectively than prior art weight saving 60% and volume-diminished more than 1/3, light and flexible during use.
(2) adopt pulse transformer, can save copper 70%, the joint ferromagnetic material is more than 80%.
(3) because the core section of transformer is little, coil turn is few, used enamel-covered wire resistance is low, so the power consumption of transformer coil is low, and in transistor when vibration in the inverter, saturated and by alternate work, the transistor heating is little, so the utility model efficient height, hear rate is little, but continuous operation.And the fast thermoelectric flatiron of existing technical staff's frequency formula, its transformer coil number of turn is many, and internal resistance is big, and the continuous operation self-heating is serious, and efficient is low, so generally can only be interrupted work.
(4) on dc source, on accumulator jar, also can directly use especially, it is convenient especially to work.
Embodiment is described in detail the utility model below in conjunction with accompanying drawing.
Fig. 1 is the fast thermoelectric flatiron structural representation of the utility model.
Fig. 2 is the cutaway view of Fig. 1 along A-A.
Fig. 3 is first kind of embodiment circuit theory diagrams of the utility model.
Fig. 4 is second kind of embodiment circuit theory diagrams of the utility model.
As shown in Figure 1 and Figure 2, moulding at one has a cavity 2 in the gun type housing 1 of casting the two halves formula, a frequency changer 7 is arranged in the cavity.This frequency changer is in series with electric power connection line by a switch 8 at the place of holding on the housing, housing top and frequency changer output 3 corresponding positions have hole 6, output stretches out from this hole 6, respectively have the hole 10 that adapts with " V " type soldering iron cephalic par in each end of output, insert in this hole 10 the solder horn end, screw 9 by the output side is fastened at solder horn on the output.Described solder horn can be that a copper wire is made, also can be at one section steel wire of weld part edge of copper solder horn, to strengthen the heating effect and the mechanical strength of flatiron head.
As shown in Figure 3, above-mentioned frequency changer 7 comprises a rectifier and an inverter.
Rectifier is by four diode D
1～D
4The full bridge structure that is connected into, thus for inverter provides a dc source, its note is made U here
1
Described inverter has:
One contains feedback line chart L
F1, feedback coil L
F2, primary coil Lp and output usefulness the pulse transformer B of secondary coil Ls.
One by transistor V
1With transistor V
2Form and be series at dc source U
1Between anode and the negative terminal, be used for conducting, end the alternate on-off circuit that carries out, its transistor V
1Emitter stage and transistor V
2Colelctor electrode join, contact B links to each other with the end of the same name of the primary coil Lp of pulse transformer; Described feedback coil L
F1End of the same name and transistor V
1Base stage connect; Described feedback coil L
F2Be connected on transistor V
2Basic emitter-base bandgap grading between, wherein with transistor V
2The feedback coil L that connects of emitter stage
F2One end is an end of the same name;
One by capacitor C
3And capacitor C
4Be composed in series the circuit that charges and discharge that is used to produce vibration, its two ends are connected to dc source U
1Anode and negative terminal, capacitor C
3And C
4Contact A link to each other with the different name end of above-mentioned primary coil Lp;
One is used for transistor V
1, V
2Produce the start-up circuit of vibration, comprise resistance R
5, capacitor C
5Be composed in series, be connected to dc source U
1Positive and negative two ends, resistance R
5And capacitor C
5Contact and transistor V
2Base stage between and contact and transistor V
1Emitter stage between the diac B that connects respectively
DWith diode D
7, diode D
7Positive pole be connected on the above-mentioned contact, negative pole is connected in transistor V
1Emitter stage on.
The operation principle of the fast thermoelectric flatiron of the utility model is: when Closing Switch K, civil power is after the full-bridge rectifier rectification, at its output dc source U that to obtain a mean value be 0.9 * 220V
1, transistor V at this moment
1, V
2Because of having the forward bias current, basic emitter-base bandgap grading is not in cut-off state, dc source U
1Positive terminal voltage is through resistance R
5To capacitor C
5Charging, capacitor C
5Both end voltage rises, when its magnitude of voltage reaches diac B
DDuring breakdown voltage, capacitor C
5On electric charge promptly to transistor V
2The discharge of basic emitter-base bandgap grading, V
2Conducting, collector current is by dc source U
1Anode passes through capacitor C
3, primary coil Lp, transistor V
2The collection emitter-base bandgap grading flow to negative terminal, this moment transformer iron core magnetization, feedback coil L simultaneously
F2Last generation induced electromotive force, and be transistor V
2The forward bias current is provided, transistorized collector current is further increased, this is a positive feedback, transistor V as a result
2Be in saturation conduction very soon, during this, accumulate magnetic field energy in the iron core gradually, and feedback coil L
F1On induced potential because of polar relationship, to transistor V
1Be in anti-partially and end.At this moment capacitor C
3Because of charging, both end voltage raises, and A point current potential descends, and is added on the voltage and the feedback coil L of primary coil Lp two ends
F2On the also corresponding decline of induced potential, as feedback coil L
F2Induced potential drop to a certain value, be not enough to the driving transistors saturation conduction, transistor V
2Collector current descend, according to Lenz's law, the induced potential pole reversal of each coil of pulse transformer B is accumulated in magnetic energy in the iron core previously and forms electric current in following loop respectively and discharge: discharges by solder horn on secondary coil Ls; At feedback coil L
F2On then by transistor V
2Form the pull-down current of a basic emitter-base bandgap grading, make transistor V
2Collector current further descends until ending; At feedback coil L
F1Last formation is to transistor V
1The forward bias current of base emitter-base bandgap grading, V
1Conducting, capacitor C
3On electric charge through primary coil Lp, transistor V
1Collection emitter-base bandgap grading discharge, collector current is from dc source U
1Anode is through transistor V
1, primary coil Lp, capacitor C
4Flow to negative terminal, the iron core magnetization of transformer makes each coil on it produce induced potential, L on feedback coil
F1The induced potential that produces then makes transistor V
1The forward bias current increase, impel transistor V
1Collector current further increase transistor V as a result
1Be in saturation conduction very soon.Iron core accumulation this moment magnetic energy, and capacitor C
4Charging, A point current potential rises gradually, and the corresponding voltage that is added to primary coil Lp two ends descends gradually, and the induced potential of feedback coil also descends thereupon, as feedback coil L
F1On induced potential drop to a certain value and be not enough to driving transistors V
1Saturation conduction, transistor V
1Collector current descend, according to Lenz's law, each coil electromotive force of transformer is reverse, the magnetic energy that originally accumulated in the iron core forms loop current respectively in secondary wire coil Ls and solder horn, at feedback coil L
F1With transistor V
1The loop of base emitter-base bandgap grading forms pull-down current, at feedback coil L
F2With transistor V
2Form forward current and obtain release on the base emitter-base bandgap grading loop, at this moment transistor V
1End transistor V
2Conducting.Transistor V like this
1, V
2In turn conducting and ending, forming frequency in the primary coil Lp of pulse transformer B is that kilohertz arrives tens of kilo hertzs pulse ac, thereby by magnetic coupling, make the cross section big, and only the secondary coil of a circle induce low-voltage and high-current pulse ac electricity for solder horn intensification heating.
For making more reliably working of frequency changer, on circuit, also take following measure:
(1) in the front and back of rectifier, difference shunt capacitance C
1And C
2, seal in the high-frequency interferencing signal of power supply with elimination, alleviate work influence to frequency changer, reduce by the external high frequency radiation of electrical network.
(2) at transistor V
1And V
2The collection emitter-base bandgap grading between, the diode D of a reversal connection in parallel respectively
5, D
6, so that the high-voltage pulse current that primary coil Lp responds to is passed through capacitor C in the moment of overturning
3, diode D
5Or capacitor C
4, diode D
6Bleed off, thereby avoid transistor V
1Or V
2Be subjected to the reverse impact of high-voltage pulse current and damage transistor.
(3) for reducing transistor V
1, V
2U
BEDifference shape play the imbalance of circuit, reduce feedback coil L
F1, L
F2To transistorized excessive excitation cause saturated deeply, at transistor V
1, V
2Base stage and emitter stage on series resistance R respectively
3, R
1And resistance R
4, R
2
The frequency changer of this structure is because the circuit upset is by capacitor C
3, C
4Discharge and recharge and the current potential lifting of contact A realizes, so the pulse transformer iron core is less demanding, generally can adopt common E type ferrite or annular core.And after adopting above-mentioned start-up circuit, frequency of oscillation is stable, and it is more reliable to work.
Fig. 4 is that it is directly to utilize dc source according to the another kind of fast thermoelectric flatiron of said structure design.Present embodiment is a battery, and voltage is the fast thermoelectric flatiron of 12V power supply.The frequency changer of this fast thermoelectric flatiron is a kind of inverter of self-excitation type push-pull type structure, and specifically, this frequency changer has one and contains feedback coil L
F1, feedback coil L
F2, primary coil L
P1, primary coil L
P2And the pulse transformer B of the secondary coil Ls that connects with solder horn 4 of output usefulness, wherein feedback coil L
F1, primary coil L
P1And feedback coil L
F2Series connection is successively pressed the oscillation-use transistor V that common collector connects for two
1, V
2, its transistor V
1Emitter stage and transistor V
2Emitter stage respectively with primary coil L
P1End of the same name, primary coil L
P2The different name end connect transistor V
1Base stage and feedback coil L
F1End of the same name link to each other transistor V
2Base stage and feedback coil L
F2The different name end link to each other transistor V
1Base stage and colelctor electrode between the series connection resistance R
1, transistor V
1And V
2Collector plate with linking to each other primary coil L with power positive end
P1And L
P2Contact link to each other with power supply negative terminal, one by resistance R
4And C
2Be composed in series and be parallel to transistor V
1Emitter stage and transistor V
2The holding circuit at the two ends of emitter stage.
This fast thermoelectric flatiron running is: Closing Switch is connected power supply, and the power positive end electric current is through resistance R
1, transistor V
1Basic emitter-base bandgap grading, primary coil L
P1Flow to power supply negative terminal, transistor V
1Conducting, V
1Collector current flow through primary coil L
P1, make the transformer magnetization, make other coil produce induced electromotive force simultaneously, at feedback coil L
F2The electromotive force of last generation makes transistor V
2Base stage anti-end partially, at feedback coil L
F1The electromotive force of last generation makes crystal V
1Collector current further increase.This is a positive feedback, transistor V as a result
1Be in the saturation conduction state very soon, almost whole at this moment supply voltage U
1All be added to primary coil L
P1Two ends.When the magnetic flux of transformer core near or during the value of reaching capacity, the flux change amount is near null value, at this moment the induced potential on all coils on the transformer core is also near null value, so transistor V
1Base current reduce collector current and begin to descend, according to Lenz's law, originally be accumulated in the induced potential polarity reversal that magnetic energy in the iron core makes the transformer all coils, and discharged: at primary coil L by loop current
P1And L
P2By by resistance R
4And capacitor C
2The electric current of the holding circuit of forming discharges, thereby avoids transistor V
1Be subjected to L
P1The high pressure back pulse impact; At feedback coil L
F1By transistor V
1Basic emitter-base bandgap grading form pull-down current, V
1Terminate in that secondary coil Ls then discharges by the load current that solder horn forms; At transistor V
1When ending, feedback coil L
F2The induced potential of last generation makes transistor V
2Base stage be in the positive incentive state, transistor V
2Conducting, V
2Collector current from power positive end through transistor V
2, primary coil L
P2Flow to power supply negative terminal, transformer is magnetized, at feedback coil L
F2The electromotive force of last generation makes V
2Collector current further increase, B point current potential raises, this also is positive feedback, a transistor V as a result
2Be in the saturation conduction state very soon, almost whole at this moment supply voltage U
1All be added to primary coil L
P2Two ends, iron core progressively accumulates magnetic energy, when the magnetic flux on the iron core near or during the value of reaching capacity, the flux change rate is near null value, the induced potential on all coils is also near null value, so transistor V
2Base current reduce, collector current begins to descend, according to Lenz's law, the magnetic energy that originally was accumulated in iron core makes the induced potential polarity reversal of all coils in the transformer, and becomes electric current respectively in following four loops and discharge; At primary coil L
P2And L
P1The electric current that forms by holding circuit discharges, and high pressure back pulse electric current is at first disappeared in holding circuit; Discharge by the load current that solder horn forms at secondary coil Ls; At feedback coil L
F2By transistor V
2Basic emitter-base bandgap grading form pull-down current, V
2End; At feedback coil L
F1Then to transistor V
1Base stage forms forward bias current, V
1Transfer conducting once more to by cut-off state.The said process formation self-oscillation that goes round and begins again is at pulse transformer primary coil L
P1, L
P2In form frequency and reach kilo hertz square-wave pulse alternating current to tens kilo hertzs, and, in secondary coil Ls, obtain a low-voltage, high-current iron pulse current for the solder horn heating by iron-core magnetic induction.
In addition, for reducing feedback coil L
F1, L
F2To transistor V
1And V
2Cause dark saturated of excessive excitation or damage transistor, at transistor V
1, V
2Base stage and feedback coil L
F1, L
F2Between, difference series resistance R
2, R
3
Burn out oscillistor V for avoiding circuit to connect anti-dc source
1, V
2, in resistance R
1Between power positive end and power supply negative terminal, the diode D of a reversal connection in parallel
1With fuse BX of series connection, thus when the circuit reversal connection battery current diode D that directly flows through
1, fuse BX, form the protection loop.
The fast thermoelectric flatiron that the utility model provides, easy to use flexible because volume is little, in light weight, the solder horn heating is fast, but continuous operation again is suitable for the soldering of small size metal, and especially the welding of radio component is used.
Claims (5)
1, a kind of fast thermoelectric flatiron comprises housing, and switch and " V " type soldering iron head are formed, and it is characterized in that: a frequency changer is arranged in the housing, and input one end of this frequency changer is connected with switch, and its output two ends are in parallel with " V " type soldering iron head.
2, fast thermoelectric flatiron according to claim 1 is characterized in that described frequency changer is made up of commercial power rectification device and inverter, and rectifier links to each other with inverter, for the vibration of inverter provides a dc supply
3, fast thermoelectric flatiron according to claim 2, it is characterized in that inverter be a kind ofly comprise a pair of conducting, by the transistor that takes turns to operate and the self-excitation type semibridge system structural circuit that pulse transformer is formed.
4, fast thermoelectric flatiron according to claim 1 is characterized in that described frequency changer is is that the conducting that comprises of importing power supply ends a pair of crystal and the self-excitation type push-pull type structural circuit that pulse transformer is formed that takes turns to operate with the direct current.
5, fast hot iron according to claim 1 and 2 is characterized in that the welded header of " V " type soldering iron head studs with one section steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94213790 CN2199835Y (en) | 1994-05-26 | 1994-05-26 | Quick-heating electric iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94213790 CN2199835Y (en) | 1994-05-26 | 1994-05-26 | Quick-heating electric iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2199835Y true CN2199835Y (en) | 1995-06-07 |
Family
ID=33830253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94213790 Expired - Fee Related CN2199835Y (en) | 1994-05-26 | 1994-05-26 | Quick-heating electric iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2199835Y (en) |
-
1994
- 1994-05-26 CN CN 94213790 patent/CN2199835Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |