CN202539742U

CN202539742U - Temperature-adjustable electric soldering iron with electric leakage protection function

Info

Publication number: CN202539742U
Application number: CN201220072256XU
Authority: CN
Inventors: 肖兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2012-11-21
Anticipated expiration: 2022-03-01

Abstract

The utility model provides a temperature-adjustable electric soldering iron with an electric leakage protection function. The electric soldering iron comprises an electric leakage protection module, a key module, a display module, a main control module, a temperature sensing module, a temperature control module and a soldering iron core, and is characterized in that the main control module is respectively connected with the electric leakage protection module, the key module, the display module, the temperature sensing module and the temperature control module; and the soldering iron core is connected with the temperature sensing module and the temperature control module. The key module inputs the required temperature, and the electric leakage protection module performs electric leakage detection on 220V alternating current; if electric leakage exists, voltage at the output end is directly reduced to 0, heating is stopped, and a buzzer gives an alarm; and if electric leakage does not exist, the main control module heats the soldering iron core and supplies power to the soldering iron core through the temperature control module, the temperature sensing module measures the temperature of the soldering iron core in the process and feeds the temperature back to the main control module, the display module displays temperature data, and the main control module compares the temperature which is fed back with the set temperature and controls the current of the temperature control module so as to control the temperature of the electric soldering iron.

Description

Be with earth leakage protective temperature adjustable electric flatiron

Technical field

The utility model relates to a kind of electric iron, especially a kind ofly is with earth leakage protective temperature adjustable electric flatiron.

Background technology

As everyone knows, electric iron obtains very using widely in all trades and professions such as electronics, solder bonding metal, machine-building.The temperature of common electrical flatiron can not accurately be controlled, and in use when bigger connector is perhaps welded in the bigger zone of welding, just need then can't weld if temperature is low than higher welding temperature; But when welding the pin of integrated circuit, just need lower temperature, if too high integrated circuit or the electronic component of then very easily burning of temperature.The solder horn major part of common electrical flatiron is a fine copper, and the heater major part of flatiron is a resistance wire, very easily electric leakage in the process of using, and cause casualty accident.

Summary of the invention

For gram overcomes the above problems, the utility model provides a kind of earth leakage protective temperature adjustable electric flatiron of being with.

The utility model provides a kind of earth leakage protective temperature adjustable electric flatiron of being with; Comprise leakage protection module, key-press module, display module, main control module, TEMP module, temperature control modules, iron core; It is characterized in that: the main control module is connected with leakage protection module, key-press module, display module, TEMP module, temperature control modules respectively, and iron core also is connected with TEMP module, temperature control modules.At first import desired temperature through key-press module, the 220V alternating current carries out detection of electrical leakage through leakage protection module, if leaky then directly reduces to 0 with output end voltage; Stop heating, and through buzzer warning, otherwise the main control module is supplied power to the iron core heating through temperature control modules; In this process, the TEMP module is measured the temperature of iron core, and it is fed back to the main control module; Through display module displays temperature data; The main control module according to the temperature that feeds back with temperature be set compare the electric current of control temperature control modules, thereby the temperature of control electric iron.

The beneficial effect of the utility model is, because flatiron temperature is adjustable, applicable to different occasions, and has earth leakage protective device and in use causes unnecessary casualty accident, has higher utility.

Description of drawings

Fig. 1 is the theory diagram of the utility model.

The specific embodiment

Shown in Figure 1; The utility model provides a kind of earth leakage protective temperature adjustable electric flatiron of being with; Comprise leakage protection module 1, key-press module 2, display module 3, main control module 4, TEMP module 5, temperature control modules 6, iron core 7; It is characterized in that: main control module 4 is connected with leakage protection module 1, key-press module 2, display module 3, TEMP module 5, temperature control modules 6 respectively, and iron core 7 also is connected with TEMP module 5, temperature control modules 6.At first through the desired temperature of key-press module 2 inputs, the 220V alternating current carries out detection of electrical leakage through leakage protection module 1, if leaky then directly reduces to 0 with output end voltage; Stop heating, and through buzzer warning, otherwise main control module 4 is supplied power to iron core 7 heating through temperature control modules 6; In this process, TEMP module 5 is measured the temperature of iron core 7, and it is fed back to main control module 4; Through display module 3 displays temperature data; Main control module 4 according to the temperature that feeds back with temperature be set compare the electric current of control temperature control modules 6, thereby the temperature of control electric iron.

Leakage protection module 1 is made up of current transformer, operational amplifier, comparator.Under the normal condition, the zero line of power supply, the electric current of live wire equate, if leaky takes place; Then the electric current of two lines is unequal, and the output at comparator after current transformer, amplifier has signal output, delivers to 8031 INTO end; Have no progeny during 8031 responses are somebody's turn to do by P1.0 end output signal, IGCT is ended, make iron core voltage reduce to 0; Report to the police by loudspeaker by P1.1 end output signal simultaneously, thereby play earth leakage protective effect.Key-press module 2 and display module 3 are made up of programmable I/O interface control chip 8255, charactron, keyboard and part peripheral circuit; The basic input and output controls of 8255 working mode selection (mode 0); Its C mouth, B mouth are made delivery outlet, are used for controlling the charactron displays temperature; The A mouth is done the input port, is used for scanning detecting rule, and the triode array amplifies the signal of PC0-PC6.Main control module 4 is made up of center processor (CPU) 8031, address latch 74373, address decoder 74139, EPROM2764, static RAM (SRAM) 6264.Wherein deposit the program machine code among the EPROM2764, static RAM (SRAM) 6264 is deposited the data in the calculating process, and the 8031st, its core component carries out arithmetical operation and logical operation etc.TEMP module 5 is made up of thermocouple, transmitter, A/D converter AD7576.AD7576 is 8 A/D converters, and its data time is 100 ns, and the temperature signal that thermocouple detects is connected to the input of AD7576 through transmitter, behind AD7576, converts data signal into and sends 8031 to.Temperature control modules 6 is made up of operational amplifier, MC14528, optocoupler, driver, bidirectional thyristor etc.Wherein amplifier, MC14528 form the synchronization zero-cross impulse circuit; IGCT can extremely be gone up trigger impulse control through IGCT control turn-on time; This trigger impulse is produced on P1.0 by 8031 usefulness softwares; After receiving the zero passage lock-out pulse synchronously, extremely go up through the control that IGCT is delivered in output with driver of optocoupler pipe, and then control the temperature of iron core.

Claims

1. the utility model provides a kind of earth leakage protective temperature adjustable electric flatiron of being with; Comprise leakage protection module (1), key-press module (2), display module (3), main control module (4), TEMP module (5), temperature control modules (6), iron core (7); It is characterized in that: main control module (4) is connected with leakage protection module (1), key-press module (2), display module (3), TEMP module (5), temperature control modules (6) respectively, and iron core (7) also is connected with TEMP module (5), temperature control modules (6).