CN103949745A - Control circuit for ensuring stable work of soldering iron electric heating wire - Google Patents
Control circuit for ensuring stable work of soldering iron electric heating wire Download PDFInfo
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- CN103949745A CN103949745A CN201410199930.4A CN201410199930A CN103949745A CN 103949745 A CN103949745 A CN 103949745A CN 201410199930 A CN201410199930 A CN 201410199930A CN 103949745 A CN103949745 A CN 103949745A
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- resistance
- diode
- comparator
- heating wire
- control circuit
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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
- B23K3/033—Soldering irons; Bits electrically heated comprising means for controlling or selecting the temperature or power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention discloses a control circuit for ensuring the stable work of a soldering iron electric heating wire. The control circuit comprises a step-down rectifier unit, a comparison unit, a constant temperature unit and an electric heating wire RL, wherein the step-down rectifier unit comprises a resistor R1, a diode D1 and a polar capacitor C1, wherein one end of the resistor R1 is connected with the positive input end of an electric supply; the other end of the resistor R1 is connected with the anode of the diode D1; the cathode of the diode D1 is connected with the positive input end of the polar capacitor C1; the other end of the polar capacitor C1 is connected with the negative input end of the electric supply; the comparison unit comprises a comparator U1 and a comparator U2; the output end of the comparator U1 is connected with the negative input end of the comparator U2; the constant temperature unit comprises a polar capacitor C2, a light-emitting diode D3, a diode D4, and a bidirectional triode thyristor VS. Due to the adoption of the structure, the work of the electric heating wire is more stable, and the control circuit is easier to popularize and prompt.
Description
Technical field
The present invention relates to electric iron field, specifically guarantee the control circuit of flatiron heating wire steady operation.
Background technology
Electric iron is the indispensable instrument of electronic production and electric equipment maintenance, be mainly used in soldered elements and wire, can be divided into inner heating type electric iron and external heated electric iron by mechanical mechanism, can be divided into without inhaling tin electric iron and inhaling tin formula electric iron by function, can be divided into again high-power electric soldering iron and small power electric flatiron according to purposes difference.
At present, constant temperature electric iron is of a great variety, of all kinds, and more common mainly contains two kinds.A kind of is the temperature controller that magnet-type is installed in thermostatic electric iron head, control conduction time and realize temperature control, while energising to electric iron, the temperature rise of flatiron, in the time reaching predetermined temperature, disappear because kicker magnet sensor has reached curie point magnetic, thereby magnetic core contact is disconnected, at this moment just stop powering to electric iron; When temperature is during lower than the curie point of kicker magnet sensor, kicker magnet just recovers magnetic, and inhales the permanent magnet in moving magnetic core switch, makes the contacting of gauge tap, continues to power to electric iron.So move in circles, just reached the object of controlling temperature.The reliability of this electric iron is not high, and electrothermal wire heating is unstable, easily affects operating efficiency.Another kind is cordless electric iron, it is a kind of novel constant-temperature formula soldering appliance, formed by cordless electric iron unit and infrared ray constant-temperature soldering station unit two parts, can realize the wireless transmission that 220V power supply electric energy is converted to heat energy, in flatiron unit block, there is temperature height adjusting knob, by 160 ~ 400 DEG C continuous adjustable, and have temperature high and low shift lattice instructions.This constant temperature electric iron cost is higher, and for power industry, it cannot accomplish to popularize well.
Summary of the invention
The object of the present invention is to provide a kind of control circuit of guaranteeing flatiron heating wire steady operation, solve current electric iron constant temperature unreliable, cause affecting the problem of heating wire steady operation.
The present invention for achieving the above object, realizes: guarantee the control circuit of flatiron heating wire steady operation, comprise step-down rectifier unit, comparing unit, constant temperature unit and heating wire RL by the following technical solutions;
Described step-down rectifier unit comprises resistance R 1, diode D1 and polar capacitor C1, one end of resistance R 1 is connected with the positive input terminal of civil power, the anodic bonding of the other end and diode D1, the negative electrode of diode D1 is connected with the positive input terminal of polar capacitor C1, and the other end of polar capacitor C1 is connected with the negative input end of civil power;
Described comparing unit comprises comparator U1 and comparator U2, the output of comparator U1 is connected with the negative input end of comparator U2, the negative input end of described comparator U1 is connected with the slide rheostat W1 of series connection successively, resistance R 2 and slide rheostat W2, a quiet end of described slide rheostat W1 is connected with the negative electrode of diode D1, another quiet end is connected with one end of resistance R 2, the other end of resistance R 2 is connected with a quiet end of slide rheostat W2, another quiet end of slide rheostat W2 is connected with the negative input end of civil power by series resistor R3, the moved end of described slide rheostat W1 is connected with the positive power source terminal of comparator U2, the positive power source terminal of comparator U2 is also connected with the negative input end of civil power by series diode D2, the negative electrode of described diode D2 is connected with the positive power source terminal of comparator U2, the moved end of described slide rheostat W2 is connected with the negative input end of comparator U1, the positive input terminal of described comparator U1 is connected with resistance R 4 and the thermocouple sensor S of series connection, the positive input terminal of described comparator U2 is connected with resistance R in parallel 6 and resistance R 7, resistance R 6 is connected with the positive input terminal of civil power, resistance R 7 is connected with the negative input end of civil power,
Described constant temperature unit comprises polar capacitor C2, light emitting diode D3, diode D4 and bidirectional triode thyristor VS, described light emitting diode D3 and diode D4 parallel connection, and the anode of light emitting diode D3 is connected with the negative electrode of diode D4, the anodic bonding of the negative electrode of light emitting diode D3 and diode D4, the positive input terminal of described polar capacitor C2 is connected with the output of comparator U2, the anodic bonding of the other end of polar capacitor C2 and light emitting diode D3, three ends of described bidirectional triode thyristor VS respectively with the anode of diode D4, the negative input end of civil power, heating wire RL connects, the other end of heating wire RL is connected with the positive input terminal of civil power.
Further, as preferred version, the present invention also comprises resistance R 5, and one end of described resistance R 5 is connected with the output of comparator U1, and the other end is connected between resistance R 4 and thermocouple sensor S.
Further, as preferred version, the resistance of described resistance R 1 is 47K Ω, the resistance of resistance R 2 is 680K Ω, and the resistance of resistance R 3 is 150K Ω, and the resistance of resistance R 4 is 100K Ω, the resistance of resistance R 5 is 1500K Ω, and the resistance of resistance R 6 is 680K Ω, and the resistance of resistance R 7 is 560K Ω.
Further, as preferred version, the model of described comparator U1 and comparator U2 is LM3582.
Further, as preferred version, the model of described diode D1 is IN4007, and diode D2 is that model is the Zener diode of IN5393, and the model of diode D4 is IN4148.
Further, as preferred version, the model of described bidirectional triode thyristor VS is MAC97A6.
Further, as preferred version, the maximum value of described slide rheostat W1 is 200K Ω, and the maximum value of slide rheostat W2 is 470K Ω.
Further, as preferred version, the capacitance of described capacitor C 1 is 0.5 μ F, and the capacitance of capacitor C 2 is 0.47 μ F.
The present invention compared with prior art, have the following advantages and beneficial effect: the present invention is by step-down rectifier unit, 220V electric main is carried out to step-down, halfwave rectifier, and then through polar capacitor C1 filtering, filtered voltage is supply voltage and the temperature adjustment setting voltage source of device as a comparison, simultaneously, because the voltage of comparator U1 positive input terminal is that 220V electric main is through resistance R 6, R7 dividing potential drop and obtaining, its frequency, phase place is completely identical with 220V electric main, the alternating voltage of comparator U2 output is successively through polar capacitor C2, diode D4, bidirectional triode thyristor VS, corresponding voltage is added on heating wire RL, thereby reach the object of constant temperature.This control circuit can be guaranteed flatiron heating wire steady operation, and reliability is high, and design is simultaneously more reasonable, practical, and cost is lower, is suitable for popularizing.
Brief description of the drawings
Fig. 1 is the electrical block diagram of embodiments of the invention 1;
Fig. 2 is the electrical block diagram of embodiments of the invention 2.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1:
As shown in Figure 1, the control circuit of guaranteeing flatiron heating wire steady operation described in the present embodiment, comprises step-down rectifier unit, comparing unit, constant temperature unit and heating wire RL; Step-down rectifier unit comprises resistance R 1, diode D1 and polar capacitor C1, one end of resistance R 1 is connected with the positive input terminal of civil power, the anodic bonding of the other end and diode D1, the negative electrode of diode D1 is connected with the positive input terminal of polar capacitor C1, and the other end of polar capacitor C1 is connected with the negative input end of civil power;
The comparing unit of the present embodiment comprises comparator U1 and comparator U2, the output of comparator U1 is connected with the negative input end of comparator U2, the negative input end of comparator U1 is connected with the slide rheostat W1 of series connection successively, resistance R 2 and slide rheostat W2, a quiet end of slide rheostat W1 is connected with the negative electrode of diode D1, another quiet end is connected with one end of resistance R 2, the other end of resistance R 2 is connected with a quiet end of slide rheostat W2, another quiet end of slide rheostat W2 is connected with the negative input end of civil power by series resistor R3, the moved end of slide rheostat W1 is connected with the positive power source terminal of comparator U2, the positive power source terminal of comparator U2 is also connected with the negative input end of civil power by series diode D2, the negative electrode of diode D2 is connected with the positive power source terminal of comparator U2, the moved end of slide rheostat W2 is connected with the negative input end of comparator U1, the positive input terminal of comparator U1 is connected with resistance R 4 and the thermocouple sensor S of series connection, the positive input terminal of comparator U2 is connected with resistance R in parallel 6 and resistance R 7, resistance R 6 is connected with the positive input terminal of civil power, resistance R 7 is connected with the negative input end of civil power,
The constant temperature unit of the present embodiment comprises polar capacitor C2, light emitting diode D3, diode D4 and bidirectional triode thyristor VS, light emitting diode D3 and diode D4 parallel connection, and the anode of light emitting diode D3 is connected with the negative electrode of diode D4, the anodic bonding of the negative electrode of light emitting diode D3 and diode D4, the positive input terminal of polar capacitor C2 is connected with the output of comparator U2, the anodic bonding of the other end of polar capacitor C2 and light emitting diode D3, three ends of bidirectional triode thyristor VS respectively with the anode of diode D4, the negative input end of civil power, heating wire RL connects, the other end of heating wire RL is connected with the positive input terminal of civil power.
The operation principle of the present embodiment: first, 220V electric main is through resistance R 1 step-down, diode D1 halfwave rectifier, the voltage stabilizing of diode D2 slicing, after polar capacitor C1 filtering, the supply voltage of device and temperature adjustment setting voltage as a comparison, the positive input terminal of comparator U1 is that thermocouple detects voltage input end, the negative input end of comparator U1 is temperature adjustment setting voltage input, in the time that thermocouple sensor S detects that temperature is on the low side, the relative negative input end level of positive input terminal level of comparator U1 is low, make the output of comparator U1 also low, and then make the negative input end of comparator U2 on the low side with respect to positive input terminal, make comparator U2 be output as height, because the voltage of comparator U2 is through resistance R 6 by 220V electric main, R7 dividing potential drop and obtaining, thereby its frequency, phase place exchanges identical with 220V completely, the alternating voltage of comparator U2 positive input terminal and the DC voltage of negative input end relatively after, at the output output AC voltage of comparator U2, this alternating voltage is through polar capacitor C2, diode D4, bidirectional triode thyristor VS, corresponding voltage is added on heating wire RL, reach the object that makes heating wire RL constant temperature.
The selected model of above components and parts is as follows:
Comparator U1:LM3582, comparator U2:LM3582;
Resistance R 1:47K Ω, resistance R 2:680K Ω, resistance R 3:150K Ω, resistance R 4:100K Ω, resistance R 5:1500K Ω, resistance R 6:680K Ω, resistance R 7:560K Ω;
Diode D:IN4007, diode D2:IN5393, diode D4:IN4148;
Bidirectional triode thyristor VS:MAC97A6;
Slide rheostat W1:200K Ω, slide rheostat W2:470K Ω;
Capacitor C 1:0.5 μ F, capacitor C 2:0.47 μ F.
Embodiment 2:
As shown in Figure 2, the present embodiment has increased resistance R 5 on the basis of embodiment 1, and one end of resistance R 5 is connected with the output of comparator U1, and the other end is connected between resistance R 4 and thermocouple sensor S.Resistance R 5 can feed back to a little part for output the positive input terminal (in-phase input end) of comparator U1, so that output locking is constant in the time that small-signal fluctuates, thereby further improves output stability, makes the work of heating wire more stable.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, equivalent variations that every foundation technical spirit of the present invention is done above embodiment, within all falling into protection scope of the present invention.
Claims (8)
1. the control circuit of guaranteeing flatiron heating wire steady operation, is characterized in that: comprise step-down rectifier unit, comparing unit, constant temperature unit and heating wire RL;
Described step-down rectifier unit comprises resistance R 1, diode D1 and polar capacitor C1, one end of resistance R 1 is connected with the positive input terminal of civil power, the anodic bonding of the other end and diode D1, the negative electrode of diode D1 is connected with the positive input terminal of polar capacitor C1, and the other end of polar capacitor C1 is connected with the negative input end of civil power;
Described comparing unit comprises comparator U1 and comparator U2, the output of comparator U1 is connected with the negative input end of comparator U2, the negative input end of described comparator U1 is connected with the slide rheostat W1 of series connection successively, resistance R 2 and slide rheostat W2, a quiet end of described slide rheostat W1 is connected with the negative electrode of diode D1, another quiet end is connected with one end of resistance R 2, the other end of resistance R 2 is connected with a quiet end of slide rheostat W2, another quiet end of slide rheostat W2 is connected with the negative input end of civil power by series resistor R3, the moved end of described slide rheostat W1 is connected with the positive power source terminal of comparator U2, the positive power source terminal of comparator U2 is also connected with the negative input end of civil power by series diode D2, the negative electrode of described diode D2 is connected with the positive power source terminal of comparator U2, the moved end of described slide rheostat W2 is connected with the negative input end of comparator U1, the positive input terminal of described comparator U1 is connected with resistance R 4 and the thermocouple sensor S of series connection, the positive input terminal of described comparator U2 is connected with resistance R in parallel 6 and resistance R 7, resistance R 6 is connected with the positive input terminal of civil power, resistance R 7 is connected with the negative input end of civil power,
Described constant temperature unit comprises polar capacitor C2, light emitting diode D3, diode D4 and bidirectional triode thyristor VS, described light emitting diode D3 and diode D4 parallel connection, and the anode of light emitting diode D3 is connected with the negative electrode of diode D4, the anodic bonding of the negative electrode of light emitting diode D3 and diode D4, the positive input terminal of described polar capacitor C2 is connected with the output of comparator U2, the anodic bonding of the other end of polar capacitor C2 and light emitting diode D3, three ends of described bidirectional triode thyristor VS respectively with the anode of diode D4, the negative input end of civil power, heating wire RL connects, the other end of heating wire RL is connected with the positive input terminal of civil power.
2. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 1, is characterized in that: also comprise resistance R 5, one end of described resistance R 5 is connected with the output of comparator U1, and the other end is connected between resistance R 4 and thermocouple sensor S.
3. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 2, it is characterized in that: the resistance of described resistance R 1 is 47K Ω, the resistance of resistance R 2 is 680K Ω, the resistance of resistance R 3 is 150K Ω, the resistance of resistance R 4 is 100K Ω, the resistance of resistance R 5 is 1500K Ω, and the resistance of resistance R 6 is 680K Ω, and the resistance of resistance R 7 is 560K Ω.
4. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 1, is characterized in that: the model of described comparator U1 and comparator U2 is LM3582.
5. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 1, is characterized in that: the model of described diode D1 is IN4007, and diode D2 is that model is the Zener diode of IN5393, and the model of diode D4 is IN4148.
6. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 1, is characterized in that: the model of described bidirectional triode thyristor VS is MAC97A6.
7. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 1, is characterized in that: the maximum value of described slide rheostat W1 is 200K Ω, and the maximum value of slide rheostat W2 is 470K Ω.
8. the control circuit of guaranteeing flatiron heating wire steady operation according to claim 1, is characterized in that: the capacitance of described capacitor C 1 is 0.5 μ F, and the capacitance of capacitor C 2 is 0.47 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199930.4A CN103949745A (en) | 2014-05-13 | 2014-05-13 | Control circuit for ensuring stable work of soldering iron electric heating wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199930.4A CN103949745A (en) | 2014-05-13 | 2014-05-13 | Control circuit for ensuring stable work of soldering iron electric heating wire |
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| Publication Number | Publication Date |
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| CN103949745A true CN103949745A (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410199930.4A Pending CN103949745A (en) | 2014-05-13 | 2014-05-13 | Control circuit for ensuring stable work of soldering iron electric heating wire |
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| CN (1) | CN103949745A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801807A (en) * | 2015-04-29 | 2015-07-29 | 苏州华徕光电仪器有限公司 | Electric soldering iron harmful gas automatic eliminating circuit |
| CN104972190A (en) * | 2015-06-30 | 2015-10-14 | 傅明尧 | Constant temperature electric soldering iron heating circuit |
| CN107790840A (en) * | 2017-12-13 | 2018-03-13 | 深圳创新高电子实业有限公司 | The electric iron electronic control system of Global Link Width funtion input |
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| US3943326A (en) * | 1972-11-24 | 1976-03-09 | Royel International Pty. Ltd. | Temperature control circuit for a hand held soldering tool |
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| CN202129526U (en) * | 2011-05-16 | 2012-02-01 | 张明辉 | Automatic delayed power-off soldering iron |
| CN203227911U (en) * | 2013-02-25 | 2013-10-09 | 严嘉琛 | Electric iron |
| CN203236085U (en) * | 2013-04-15 | 2013-10-16 | 中国长城计算机深圳股份有限公司 | Constant-temperature electric soldering iron |
| CN203817571U (en) * | 2014-05-13 | 2014-09-10 | 国家电网公司 | Control circuit capable of guaranteeing stable work of soldering iron heating wire |
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2014
- 2014-05-13 CN CN201410199930.4A patent/CN103949745A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3943326A (en) * | 1972-11-24 | 1976-03-09 | Royel International Pty. Ltd. | Temperature control circuit for a hand held soldering tool |
| CN2406764Y (en) * | 1999-07-08 | 2000-11-22 | 董一伟 | Constant temp. fast electric iron |
| CN202129526U (en) * | 2011-05-16 | 2012-02-01 | 张明辉 | Automatic delayed power-off soldering iron |
| CN203227911U (en) * | 2013-02-25 | 2013-10-09 | 严嘉琛 | Electric iron |
| CN203236085U (en) * | 2013-04-15 | 2013-10-16 | 中国长城计算机深圳股份有限公司 | Constant-temperature electric soldering iron |
| CN203817571U (en) * | 2014-05-13 | 2014-09-10 | 国家电网公司 | Control circuit capable of guaranteeing stable work of soldering iron heating wire |
Non-Patent Citations (1)
| Title |
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| 夏恩泉等: "恒温电烙铁", 《电子报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801807A (en) * | 2015-04-29 | 2015-07-29 | 苏州华徕光电仪器有限公司 | Electric soldering iron harmful gas automatic eliminating circuit |
| CN104972190A (en) * | 2015-06-30 | 2015-10-14 | 傅明尧 | Constant temperature electric soldering iron heating circuit |
| CN107790840A (en) * | 2017-12-13 | 2018-03-13 | 深圳创新高电子实业有限公司 | The electric iron electronic control system of Global Link Width funtion input |
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Application publication date: 20140730 |
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