4 types of soldering irons
1. External heating soldering iron
It consists of soldering iron head, soldering iron core, shell, wooden handle, power lead, plug and other parts. Because the soldering iron tip is installed inside the soldering iron core, it is called an externally heated soldering iron. The soldering iron core is a key component of the electric soldering iron. It consists of a heating wire wound in parallel on a hollow porcelain tube. The mica sheet in the middle is insulated, and two wires are drawn out to connect to the 220V AC power supply. There are many specifications for external heating soldering irons, commonly used ones are 25W, 45W, 75W, 100W, etc. The higher the power, the higher the temperature of the soldering iron tip.
2. Internal heating soldering iron
It consists of handle, connecting rod, spring clip, soldering iron core and soldering iron tip. Because the soldering iron core is installed inside the soldering iron head, it heats up quickly and has a high heat utilization rate. Therefore, it is called an internally heated soldering iron. The common specifications of internal heating soldering irons are 20W and 50W. Due to its high thermal efficiency, a 20W internally heated soldering iron is equivalent to an approximately 40W externally heated soldering iron. The rear end of the internal heating soldering iron is hollow and is used to be sleeved on the connecting rod and fixed with a spring clip. When the soldering iron tip needs to be replaced, the spring clip must be withdrawn first and the front end of the soldering iron tip must be clamped with pliers. Pull it out slowly and remember not to use too much force to avoid damaging the connecting rod.
3. Constant temperature soldering iron
The electric soldering iron is equipped with a magnet-type temperature controller inside the constant-temperature electric soldering iron head, which controls the power-on time to achieve temperature control. That is, when the electric soldering iron is energized, the temperature of the soldering iron rises. When it reaches the predetermined temperature, due to the strong magnet sensor When the Curie point is reached and the magnetism disappears, the magnetic core contacts are disconnected, and the power supply to the soldering iron is stopped. When the temperature is lower than the Curie point of the strong magnet sensor, the strong magnet restores its magnetism and attracts the magnetic field. The permanent magnet in the core switch connects the contacts of the control switch and continues to supply power to the soldering iron. By repeating this cycle, the purpose of controlling the temperature is achieved.
4. Soldering iron
It is a desoldering tool that integrates a piston type solder suction device and an electric soldering iron. It is easy to use, flexible, and has a wide range of applications. The disadvantage of this desoldering iron is that it can only desolder one solder joint at a time.
