How to extend the service life of electric soldering iron
For home appliance maintenance personnel and electronic enthusiasts, electric soldering iron is one of the necessary welding tools in maintenance work, and its quality and quality directly affect the efficiency of maintenance work. we know. In daily maintenance work, the electric soldering iron is often in a long-term energized working state, and the soldering iron tip is seriously oxidized due to overheating. The lack of tin on the tip of the soldering iron makes soldering difficult and reduces work efficiency. Once the tip of the soldering iron is severely oxidized. No matter what method you use, it is difficult to make it tinned. Although various countermeasures have been introduced in the newspaper, in fact it cannot completely solve the problem. Sometimes it is temporarily resolved. But after a while, the tip of the soldering iron was still oxidized severely. To this end, the author read the information. Hope to find a way to prolong the life of the soldering iron. First of all, the author tried the method introduced by the newspaper, that is, installing a diode and a switch on the power supply of the electric soldering iron. The circuit is shown in Figure 1. When the electric soldering iron is powered on, the switch in Figure 1 is in the normally open position. Due to the connection of the diode, the electric soldering iron works in a half-wave rectification state, and its power is about half of the usual power. overheated oxidation. While working, just press the switch. The electric soldering iron works at the rated power, and its temperature will rise rapidly to facilitate welding. The disadvantage is that the switch needs to be pressed every time it works, so it is always inconvenient to use. If the circuit is changed to the circuit in Figure 2, the effect is slightly better.
The circuit just uses a temperature switch instead of an ordinary switch, and the temperature switch is fixed on a thin aluminum plate. As long as the soldering iron tip of the electric soldering iron is placed on the thin aluminum plate, once the temperature reaches 100°C, the temperature switch will be disconnected. At this time, only the diode is energized, and the electric soldering iron works in a half-wave state. Reduce the power of the soldering iron to prevent the tip of the soldering iron from overheating. It also indirectly prolongs the service life of the electric soldering iron. There is no need to press the switch when working at the same time.
Although the service life of the electric soldering iron can be extended after modification, the disadvantage is that it cannot be welded quickly, making it unacceptable to the majority of home appliance maintenance personnel and electronics enthusiasts. Can you find a better solution? The author first analyzed the working principle of the constant temperature electric soldering iron. Its working principle is probably the same as the above example. After reaching the set temperature, the electric soldering iron turns off the power supply, and once the temperature drops, it turns on again. The power supply keeps it at the set temperature. Just like a voltage regulator. Can this problem be solved by adjusting the voltage? For this reason, the author first thought of the electronic voltage regulator. After testing, the effect of using the electronic voltage regulator to adjust the electric soldering iron is indeed better.
