The difference between a soldering hair dryer and a conventional hygienic one is limited to a rough, heavy construction. Temperatures inside reach 800 degrees Celsius, but soldering is enough for 250.Hair dryer is not pull. The idea is to copy the design. Soldering hair dryer with their own hands collected from a hygienic, designed for drying hair. The heating element undergoes the greatest modernization. Get ready to add a couple of functional elements. The idea remains the same: the air blown by the fan passes through the heating element( coil), acquiring a considerable temperature that can melt the flux during soldering-soldering of the board elements. A novice radio fan who is passionate about processor technology will come in handy.
. Design of an
soldering dryer. It would be useful to design a used hair dryer. Spread stores for a maximum of 200 rubles, perhaps there is a free home. For comparison, the building costs 800 rubles, is it suitable for soldering, God knows. Try it. Is it worth saving pennies, decide for yourself. Review is considered an experiment, laughter for the sake of. Win $ 15, spending a lot of time, losing in terms of security - the benefit is dubious. The experience is interesting, if there is nothing to do, let's start.
In the commercials, the craftsmen created hair dryers, took a steel tube. Aluminum beware of placing, copper is too heavy( relative to steel).The disadvantage is the same: to keep a massive device is not possible. They wrote about induction heating machines. It was said: high temperatures spoil the copper inductor. It is caused by the secondary heat given off by the melted part by the infrared, convection path. Mentioned ceramic heat-resistant fabric that can withstand temperatures above 1000 degrees Celsius without damage. In parallel, a list of materials used, not afraid of heating.
The situation is similar with a soldering iron. Metal will glow red hot - how to hold with one hand? In the amateur videos, the blowtorch lay motionless on a rack, the board with its hinged elements moved relative to it. Everyone familiar with amateur radio guesses about the inconvenience of the technique. Clearly, I wanted to feel something better at hand. .. If readers are lucky enough to get heat-resistant fabric - the most useless instances hold the temperature of 800 degrees Celsius - the problem will be largely solved. Recall: in induction melting plants the fabric covers a spiral, protecting from red-hot billet. The material is laid outside, there will not be a large load. A few layers are enough to adjust the oven mitten to hold the appliance on top.
What is good for designing an old hair dryer? In simple cheap models we will find mica plates that easily keep the temperature. Spiral soldering hot red hot, therefore, sought a solid foundation, not afraid of the load. Suitable standing under the high resistance wire. The spirals are connected by a crosspiece - great. A few words about the spirals: use soft nichrome( hard fehrl), which is required to purchase. No problem - the network is full of shops. Fechral tougher, misplaced occasion.
There was a question of determining the power. Too much heat will melt the flux, can burn the chips. The radio amateur knows: a too powerful soldering iron is the worst enemy of electronic components, competing with static electricity. With inept hands, the sting becomes a real weapon for killing microchips and attached elements. Complex components have an incredible number of legs, melting the flux takes time.
The question was inspired by the YouTube video: the beginner radio amateur describes the first experience of making a soldering iron unsuccessful, lacked power, had to wait a minute for the flux to melt. Clearly, a rare individual is ready to pass the test, you have to hold the scheme with your bare hands near the fixed soldering dryer. We suggest that readers study the market, determine what capacity is characteristic of the class of devices being designed, find the resistivity of nichrome, calculate the Joule-Lenz effect to avoid boredom, partially do the work.
Tester Selection of the characteristics of anhome-made soldering hair dryer
Apt to think: a homemade soldering dryer should be more like a purchase. We stumbled upon a BAKU 8032, going for 900 rubles, although on average the capital markets are more expensive. Specifications lined resource where the price is increased. That's right - market competition requires a competent approach. Soldering dryer has the following indicators:
- The power consumption of a network of 230 volts( 50 Hz) is 450 watts.
- Fan capacity - 30 liters per minute( maximum).
- Temperature range 100-500 degrees.
The lion's share of power is consumed in a spiral. You are deprived of the ability to measure resistance by yourself, from experience, let's say, about 97 ohms will be released.
- to find a nichrome wire suitable for winding spirals;
- learn the characteristics( resistivity per meter);
- calculate the length necessary to get 97 Ohms;
- make sure that it is correct by measuring the resistance of the spiral of a future soldering dryer with a tester.
As far as performance is concerned, nothing is easier than to measure. It will take a roomy package. Take and blow the original hair dryer at maximum speed polyethylene tank, from which the air is released. You can estimate in advance how much cellophane. At home, buckets, tubs, tubs, and pots will serve as the standard of measure - compare. Now we can relatively simply measure the performance of the future soldering dryer from the point of view of hot air generation. Discussed enough to get a workable soldering hair dryer, issuing a jet temperature of 450 degrees Celsius.
Let's explain the device of the soldering dryer in addition. Many are interested in how we quickly determined how much Ohm to take a spiral. Just really. The typical spiral of an accumulative water heater is issued 2 kW in power. At the same time the resistance is around 25 ohms. If you take four times a large spiral, you get a power of about 500 W, the resistance reaches 97 Ohms. The calculation is made on the fingers, if you wish, substitute the value in the Joule-Lenz law. Paradoxically: the more wire we wind, the lower the heat effect. This follows from the law. Power on it is the division of the square of the voltage by the resistance.
Easily verify that the conclusions are correct. What to do if the spiral is too long. Deal with the large consumption of soldering dryer, as well as the danger of damaging the parts. The temperature will rise too quickly, and the designers of the professional company have pre-calculated the safe modes( and not better to buy ready-made?).Exceed is not recommended. And one more option. Try to find an alloy whose resistivity is higher than nichrome. Difficult way, probably the creators of household appliances are not so stupid, stubbornly continue to use nichrome and fechral in products, therefore, not to get much benefit from this.
You see that making a blowtorch is difficult to do with your own hands. And vice versa - it is easy to spoil the chips with an incorrect design. Frankly, 1000 rubles is not the money for which you need to fight for the sake of an idea. It is clear that professional stations cost more than 3,000 rubles, but at home they cannot create such a miracle for another hundred years. That is why, we emphasize, the review is more of an introductory character.
Concluding remarks on the design of a soldering dryer.
. Maybe someone will say we did not specify exactly how to make a blowtorch. We just think everything is so clear:
- We remove the helix from the original hair dryer along with the carrier from quartz.
- Cut off the nozzle, leaving a small branch for fastening new items.
- Inside the steel tube we insert the base with a spiral. The wires go inside wrapped with refractory fabric, which will be found in household heating appliances.
- The hair dryer body is made of plastic and will not withstand the high temperatures of the steel pipe. .. we put it on the heat-resistant glue through a ceramic adapter. The grinder can be cut off from high voltage pole-line insulators( sold in a store).
- We paste ceramics on the same composition to the body.
Actually, the principle of operation of the soldering dryer is fully implemented. Start working. We believe that few really need a blowtorch. Weapons of professional craftsmen and repairmen, which the life of an ordinary citizen has been collecting dust on the shelf for years. We add that the soldering of planar microcircuits requires strict adherence to temperature conditions.