阅读说明：本技术 一种具有调温功能的电烙铁插座 (Electric iron socket with temperature adjusting function ) 是由 邱德敏 于 2020-05-11 设计创作，主要内容包括：本发明公开一种具有调温功能的电烙铁插座,包括箱体,所述箱体的一侧安装有电源线,所述箱体的正面上端安装有电源指示灯和数字电压表,所述箱体的正面下端安装有电源开关、调节旋钮和输出插座,所述箱体内部安装有时基集成电路NE7555、整流桥VD1、电源模块MD1和功率场效应管(MOS管)Q1,本具有调温功能的电烙铁插座采用时基集成电路NE7555构成多谐振荡器,触发功率场效应管Q1,通过调节电位器POT1,改变输出占空比,从而调节电烙铁的焊接温度,满足焊接工艺要求。(The invention discloses an electric soldering iron socket with a temperature adjusting function, which comprises a box body, wherein a power line is installed on one side of the box body, a power indicator lamp and a digital voltmeter are installed at the upper end of the front surface of the box body, a power switch, an adjusting knob and an output socket are installed at the lower end of the front surface of the box body, a time-base integrated circuit NE7555, a rectifier bridge VD1, a power module MD1 and a power field effect tube (MOS tube) Q1 are installed in the box body, the electric soldering iron socket with the temperature adjusting function adopts the time-base integrated circuit NE7555 to form a multivibrator, triggers the power field effect tube Q1, and changes the output duty ratio by adjusting a potentiometer POT1, so that the welding temperature of an electric soldering iron is adjusted.)

1. The utility model provides an electric iron socket with function adjusts temperature, includes box (1), the power cord, its characterized in that are installed to one side of box (1): power indicator lamp (6) and digital voltmeter (2) are installed to the front upper end of box (1), switch (5), adjust knob (4) and output socket (3) are installed to the front lower extreme of box (1), box (1) internally mounted has time base integrated circuit NE7555, rectifier bridge VD1, power module MD1 and power field effect transistor (MOS pipe).

2. The electric soldering iron socket with the temperature adjusting function according to claim 1, wherein a zero line of the power line is connected with a negative temperature coefficient thermistor NTC, a live wire of the power line is connected with a power switch (5), the other end of the negative temperature coefficient thermistor NTC is connected with an AC pin of a rectifier bridge VD and a first pin of a power module MD, the other end of the power switch (5) is connected with a fuse, the other end of the fuse is connected with the other AC pin of the rectifier bridge VD and a second pin of the power module MD, a V + pin of the rectifier bridge VD is connected with an N end of an output socket (3) and a measuring end of a digital voltmeter (2), a V-pin of the rectifier bridge VD is connected with an S pin of a power field effect transistor (MOS) which is connected with an output terminal of a power source diode, a D pin of the power field effect transistor (MOS) is connected with an output socket (3), a G pin of the power field effect transistor (MOS) is connected with a resistor R, the other end of the time base integrated circuit NE7555, a negative terminal of the power source module MD is connected with a positive terminal of a time base integrated circuit diode 75C, a power module MD, a negative terminal of a time base integrated circuit of a power source module MD, a time base integrated circuit 75C, a power module MD, a power source module MD, a power module, a.

3. An electric soldering iron socket with a temperature adjusting function according to claim 1 or 2, wherein: the digital voltmeter is a digital display voltmeter SX1 which is a three-position true effective value digital voltmeter.

Technical Field

The invention relates to the technical field of electric soldering irons, in particular to an electric soldering iron socket with a temperature adjusting function.

Background

The electric soldering iron is a necessary tool for electronic production and electric appliance maintenance, mainly used for welding elements and wires, and can be divided into an internal heating type electric soldering iron and an external heating type electric soldering iron according to a mechanical structure, and can be divided into a common electric soldering iron and a temperature-regulating electric soldering iron according to a control mode. The common electric soldering iron has the defects that the temperature can not be adjusted, the fluctuation influence of the external environment temperature and the power supply voltage is large, different temperature requirements are required when different parts are welded, the temperature of the common electric soldering iron is always raised to the maximum and can not be adjusted, the service life of a heating core of the electric soldering iron is influenced, an iron head is easy to oxidize, and components are easy to damage due to overheating.

The common electric soldering iron is changed into a temperature-regulating electric soldering iron, a bidirectional thyristor phase-shifting trigger circuit is usually adopted, the temperature-regulating electric soldering iron is similar to a speed-regulating circuit of a ceiling fan or a light-regulating desk lamp circuit, true effective value digital display is not available, and the output voltage cannot be higher than the power supply voltage.

Disclosure of Invention

The invention aims to provide an electric soldering iron socket with a temperature adjusting function, and aims to solve the problems that the temperature of a common electric soldering iron provided in the background technology is always raised to the highest value and cannot be adjusted, the service life of a heating core of the electric soldering iron is influenced, a soldering iron head is easy to oxidize, and components are easy to damage due to overheating.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an electric iron socket with function adjusts temperature, includes the box, the power cord, its characterized in that are installed to one side of box: the power supply device is characterized in that a power indicator lamp and a digital voltmeter are installed at the upper end of the front face of the box body, a power switch, an adjusting knob and an output socket are installed at the lower end of the front face of the box body, and a time-base integrated circuit NE7555, a rectifier bridge VD1, a power supply module MD1 and a power field effect transistor are installed inside the box body.

Preferably, a zero line of the power line is connected with a negative temperature coefficient thermistor NTC, a live wire of the power line is connected with a power switch, the other end of the negative temperature coefficient thermistor NTC is connected with an AC pin of a rectifier bridge VD and a first pin of a power module MD, the other end of the power switch is connected with a fuse, the other end of the fuse is connected with another AC pin of the rectifier bridge VD and a second pin of the power module MD, a V + pin of the rectifier bridge VD is connected with an N terminal of an output socket and a measurement terminal of a digital voltmeter, a V-pin of the rectifier bridge VD is connected with an S pin of a power field effect transistor, a D pin of the power field effect transistor is connected with a terminal of the output socket, a G pin of the power field effect transistor is connected with a resistor R, the other end of the resistor R is connected with a Q pin of a time base integrated circuit 7555, a capacitor C and a capacitor C are connected between the V + pin of the rectifier bridge VD and the V-pin, a third pin of the power module VD is connected with a time base integrated circuit diode R diode 75ne, a fourth pin of the output socket is connected with a terminal of the power module VCC, a common terminal of the power module cd 75r, a ground terminal of the power module MD terminal of the power module, a fifth terminal of the power module, a ground terminal of the power module MD terminal of the power module, a diode 75ne is connected with a ground terminal of the diode 75ne, a ground terminal of the diode 75ne, a ground terminal of the diode, a time base integrated circuit, a diode is connected with a time base integrated circuit, a time base integrated circuit 75ne diode, a.

Preferably, the digital voltmeter is a digital display voltmeter SX1 which is a three-position true effective value digital voltmeter.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts NE7555 time base integrated circuit to form multivibrator, triggers power field effect tube, adjusts the voltage duty ratio of the output socket of the electric soldering iron, thereby changing the effective value of the voltage of the heating core of the electric soldering iron, changing the heating power of the electric soldering iron, and the temperature of the electric soldering iron changes immediately.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the circuit of the present invention.

In the figure: 1. a box body; 2. a digital voltmeter; 3. an output socket; 4. adjusting a knob; 5. a power switch; 6. and a power indicator lamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present embodiment provides an electric soldering iron socket with a temperature adjusting function, including a box 1, a power cord is installed on one side of the box 1, a power indicator 6 and a digital voltmeter 2 are installed on the upper end of the front surface of the box 1, a power switch 5, an adjusting knob 4 and an output socket 3 are installed on the lower end of the front surface of the box 1, and a time-base integrated circuit NE7555, a rectifier bridge VD1, a power module MD1 and a power field effect transistor (MOS transistor) Q1 are installed inside the box 1.

The power supply system comprises a power supply line, a zero line of the power supply line is connected with a negative temperature coefficient thermistor NTC, a live wire of the power supply line is connected with a power switch 5, the other end of the negative temperature coefficient thermistor NTC is connected with an AC pin of a rectifier bridge VD and a first pin of a power supply module MD, the other end of the power switch 5 is connected with a fuse, the other end of the fuse is connected with the other AC pin of the rectifier bridge VD and a second pin of the power supply module MD, a V + pin of the rectifier bridge VD is connected with an N end of an output socket 3 and a measuring end of a digital voltmeter 2, a V-pin of the rectifier bridge VD is connected with an S pin of a power field effect transistor (MOS transistor), a D pin of the power field effect transistor (MOS transistor) is connected with an end of an output socket 3, a G pin of the power field effect transistor (MOS transistor) is connected with a resistor R, the other end of the resistor R is connected with a Q pin of a base integration circuit NE7555 when the other end of the resistor R is connected with a G pin of the output socket, a base integration circuit NE 754, a V + pin of the rectifier bridge VD, a base integration circuit is connected with a negative terminal of the ground terminal of the power supply module MD, a base integration circuit, a ground terminal of the DC pin of the DC circuit 754, a DC pin of the DC circuit, a DC pin of the DC circuit, a DC circuit of the DC circuit is connected with a DC circuit 754, a DC circuit of the DC circuit, a DC circuit of the DC circuit module MD, the DC circuit of the DC circuit, the DC circuit of the DC circuit module MD 754 is connected with the DC circuit, the DC circuit of the DC circuit, the DC circuit of the DC circuit.

The digital voltmeter is a digital display voltmeter SX1 which is a three-position true effective value digital voltmeter, and the adjusting knob 4 is a potentiometer POT 1.

The electric soldering iron socket with the temperature adjusting function adopts the time-base integrated circuit NE7555 to form a multivibrator, the power field effect transistor Q1 is triggered, the output duty ratio is changed by adjusting the potentiometer POT1, so that the welding temperature of the electric soldering iron is adjusted, and the welding process requirement is met. The output socket voltage regulation range is about 30V-235V (reference), the upper and lower limits of the duty ratio are limited by resistors R2 and R3, 220V power supply alternating current voltage is rectified by a rectifying bridge VD1 in a bridge mode, and capacitors C1 and C2 filter the alternating current voltage to obtain direct current voltage about 311V which is used as direct current power supply for driving electric soldering irons.

When the negative temperature coefficient thermistor NTC is connected with a power switch S1, an impact current passes through, heat is accumulated along with the increase of the current, the resistance value of the negative temperature coefficient thermistor NTC becomes smaller, and the negative temperature coefficient thermistor NTC plays a role in restraining the instant surge current when the power switch is connected in a power circuit and prevents elements such as a rectifier bridge VD1 and fuse laying from being damaged. The power supply module MD1 is a switch voltage-stabilizing power supply with two paths of output 12V, the two paths of output 12V are mutually electrically isolated and are electrically isolated from a 220V input end, one path supplies power to a digital display voltmeter, and the other path supplies power to a U1 time-base integrated circuit NE 7555. The time base integrated circuit NE7555 forms a multivibrator, and the power field effect transistor is a power field effect transistor Q1 with an N channel, voltage of 650V and current of 13A, and is of a model MDF13N 65B. The circuit has the effects of continuously adjusting the duty ratio of the output voltage and changing the effective value of the voltage of the output socket, thereby changing the heating power of the electric soldering iron and adjusting the temperature of the electric soldering iron.

The output socket CZ1 is a single-phase three-eye 10A socket, an electric soldering iron metal shell is grounded to prevent electric shock or damage of components, a resistor R1 and a light emitting diode L ED1 form a power supply indicator, a power switch S1 is switched on, L ED1 emits light, and a FUSE FUSE1 plays a role in overload and short circuit protection.

The digital display voltmeter SX1 is a three-position true effective value digital voltmeter and is used for displaying the effective voltage value of the electric soldering iron. The digital display voltmeter is more visual and accurate than the pointer voltmeter in display, and is convenient for accurate adjustment or repeated adjustment of various temperatures.

The time base integrated circuit NE7555 multivibrator circuit is in operation: when the oscillator starts to oscillate after voltage VDD is added to the circuit, and immediately after the oscillator is electrified, because the voltage on the capacitor C4 can not suddenly change, namely the initial level of the potential of the R pin is the ground potential, the time-base integrated circuit NE7555 is set, the Q pin outputs high level, the capacitor C4 charges the oscillator through RA and a rectifier diode D2, and the charging time is as follows: t is t_{Charging device}＝0.693R_AC4, when the voltage on the capacitor C4 is charged to the threshold level 2/3VDD, the time base integrated circuit NE7555 is reset, the Q pin is turned to low level, and at this time, the capacitor C4 discharges through the rectifier diodes D3, RB and the discharge tube inside the time base integrated circuit NE7555, and the discharge time is: t is t_Put＝0.693R_BC4, if the duty ratio is D, thenThe duty ratio of the adjusting potentiometer POT1 is minimum to about 10% when the center head slides to the uppermost end, and is maximum to about 90% when the center head slides to the lowermost end. T ═ T_{Charging device}+T_PutAnd T is the period. The potentiometer POT1 is adjusted to change the duty ratio, the power field effect transistor Q1 is triggered, the effective value of the iron voltage of the electric soldering iron is changed, the voltage on the electric soldering iron is rectangular pulse voltage, the frequency of the electric soldering iron is fixed to 1kHz (reference), and the capacity of the capacitor C4 can be changed if the frequency needs to be changed. RA is the sum of the resistor R3 and the first and second pin resistors of the potentiometer POT1, and RB is the sum of the resistor R2 and the second and third pin resistors of the potentiometer POT 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.