Norms

How a hair dryer is made. How to make a building hair dryer with your own hands

A technical hair dryer is a universal power tool that is used in the household for construction or repair work. With its help, surfaces are prepared for painting, plastic pipes of any diameter are bent during the installation of water supply and sewage systems, operations with heat-shrinkable materials are performed, soldered and many other works are performed. If at the right time a building hair dryer was not at hand, you can do it yourself. This task is especially relevant for those who do not have a constant need for this tool, so it is not economically feasible to buy it to perform one-time work.

A construction or technical hair dryer is a power tool designed for local heating of surfaces with a stream of hot air. Outwardly, it looks like an ordinary household appliance, only it is slightly larger and creates a higher temperature - up to 650 ° C. The hot air gun consists of the following main parts:

Some hair dryers are equipped with temperature controls and indicators, as well as the ability to turn off the heating function when the fan is running. The last addition to the design is necessary for cold blowing of heated parts in order to cool them faster.

Making a building hair dryer with your own hands

A building hair dryer can either be completely made from improvised materials, or a regular household hair dryer can be converted into it. In the first case, you need to think about what to make and how to connect together the three main components of this simple tool - an electric motor, a heating element and a fan. When converting a household hair dryer into a technical one, you need to remember that many of its parts are not designed for operation at high temperatures. Therefore, you need to take care of thermal insulation or replacement of these parts in advance.

Schematic diagram of a homemade hot air gun

In order to make a technical hair dryer from a similar household appliance or material at hand, you will need:

In the manufacture of a technical hair dryer, it is necessary to take into account the correct order of its operation, so that the fan or air supply compressor turns on first, and only after it - the heating element. Disabling elements must be done in reverse order . To fulfill this condition, it is necessary to provide for the possibility of separate switching on / off of these parts of the tool.

In the electrical part of the hair dryer, power must be provided through an alternating current rectifier in the form of a diode bridge.

To rectify alternating current in the hot air gun power supply, a conventional diode bridge is used.

Separation of the heating element coil is necessary to provide two temperature regimes.

Consider what kind of work you want to make a tool for. For example, simplifying the design by replacing the electric motor with a fan with an aquarium compressor will greatly facilitate the task, but will make the hair dryer less mobile.

How to make a technical hair dryer from improvised materials

The easiest way is to make a building hair dryer, in which the air is supplied by a compressor. To make such a device with your own hands, you need:

Take a metal pipe with a length of 170 mm and a diameter of 25 mm and insert a ceramic tube of a suitable diameter into it. Drill a 9 mm through hole in both tubes at the location where the handle is supposed to be attached and the air supply from the compressor is supposed to be. Cut a thread in a hole in a metal pipe with a tap.
As the body of a home-made building hair dryer, you can use a metal pipe and ceramic insulation introduced into it in the form of a tube
Make a wooden handle and drill a hole in it for a copper tube with a diameter of 9 mm. Fasten the handle with automotive clamps on the pipe of the thermal insulation casing so that the drilled holes coincide in them. Wrap the outside of the main pipe, which will serve as a thermal insulation casing, with asbestos thread soaked in silicate glue.
Asbestos cord impregnated with liquid glass is used to insulate the pipe.
A copper tube with a diameter of 9 mm, having previously cut a thread at one end, thread it through the hole in the handle and screw it into the main pipe where the heating element will be installed.
A copper tube for air supply is inserted through the handle and screwed to a hole in the heat-insulating casing of a homemade tool.
From both ends of the metal pipe, cut an external thread for screwing the nozzle and the connection unit to the power cable. On a lathe, make (or order from a turner) two plugs for a casing with an internal thread. One of them will be used for the nozzle, and the second for connecting the spiral.
Plugs for both ends of the thermal insulation shell are made on a lathe and cut the internal thread
From a nichrome thread 1 mm thick, wind a spiral, the length of which must be measured with an ohmmeter by resistance. It is calculated based on the required power of the hair dryer. Drill two holes for the bolts in the rear plug. One of the bolts must be isolated from the metal of the plug and the rear end of the spiral must be attached to it. A nichrome thread cannot be soldered, so it must be clamped with a nut.
One end of the nichrome spiral is attached to a bolt in a plug, separated from the metal case by an insulating gasket.
Insert the spiral into the thermal insulation casing and screw the cap to it.
The spiral attached to the rear plug must be inserted into the casing, and the plug itself must be screwed to the end of the metal pipe
To close the second end of the spiral to the housing of the casing, you need to make a groove at the front end of the hair dryer and fix a nichrome thread in it.
To close the electrical circuit to the body, you need to bend the end of the spiral and install it in a specially sawn groove at the front end of the pipe
Screw the nozzle to the metal pipe of the thermal insulation shell. The technical hair dryer is ready.
For the hair dryer to work, you will need a 36-42 volt transformer and an aquarium compressor of suitable performance

It remains to connect the bolts on the rear plug to a 36-42 volt transformer, and connect the air supply hose from the compressor to the copper tube. It is clear that such a tool can only perform a limited range of work, but its functionality will increase significantly if you make or buy interchangeable nozzles (nozzles).

Video: making a hair dryer powered by an aquarium compressor with your own hands

How to convert a household hair dryer into a technical one

The easiest way is to make a building hair dryer with your own hands, remaking an ordinary household appliance for drying hair under it. Both of these tools are similar in design, so the main task to be solved is to increase the power of the hair dryer. If a household appliance produces temperatures up to 60 o C, then we need to get a directed air flow at the outlet with a temperature of 500–600 o C. To achieve this, you need to follow certain rules:

choose for modernization a household hair dryer with a ceramic or, in extreme cases, with a plastic case made of high-quality heat-resistant polymer;
replace the internal parts of the device, which are made of low-melting plastic, by making copies of them from textolite or other heat-resistant material;
isolate parts of the old structure from the new heating element as much as possible, using any available heat-insulating materials.

Having picked up a suitable faulty household hair dryer, you can begin to upgrade it. For this you need:

Completely disassemble the hair dryer.
To upgrade a hair dryer into a technical hot air gun, first of all, we completely disassemble the household appliance
Dismantle the old low-power spiral by cutting it with side cutters.
We replace the spiral of a household hair dryer with a more powerful one, capable of heating up to 600 degrees
To wind a new spiral, it is better not to use the old base, but to lengthen its design by moving the heating element outside the body of the household hair dryer. To do this, you need to take a sheet of mica, which has high heat resistance, and mark on it two strips with a width equal to the outlet of the housing minus 2–2.5 mm.
We mark the mica plate for the manufacture of a new base for a powerful spiral
On each of the strips, mark two rows of holes with such a diameter that a new spiral can pass through them. They will be needed to provide a gap between its turns and avoid a short circuit. Drill holes with an electric drill.
In each mica plate, we drill two rows of holes for laying the spiral
Cut strips and make cuts in each of them on one side, equal in thickness to the thickness of the plates themselves.
We cut grooves in the plates for mounting the frame of the heating element
Extend the front of the tool with mica plates, connecting them with slots between themselves and with the old frame, on which the nichrome spiral was wound.
We install the basis for winding a new spiral using slots in mica plates.
Lay a new spiral, passing it through the holes in the new mica frame.
The heating element of the upgraded hair dryer is now placed outside the body of the household appliance
Make a branch from the spiral to provide two modes of operation of the hot air gun. Determine the connection point with an ohmmeter, selecting the desired resistance and power for a weaker temperature regime.
In order to get two modes of operation of the hot air gun, you need to make a tap from the spiral, which will ensure the flow of current through the circuit with less resistance
From an old pipe of a suitable diameter, it is necessary to make a casing for a new heating element, which will also be the nozzle of a modernized tool.
As a casing of a hot air gun and its nozzle, a pipe of a suitable diameter will be required
Dissolve the end of the pipe into strips to make a conical socket, to which the plastic body of the old hair dryer will be attached. Cut the pipe to the desired length and clean it well. Form a bell by cutting off excess metal, and drill holes in the right place for attaching the casing. Cut threads into them with a tap.
To obtain a cone-shaped socket, we dissolve one end of the pipe into narrow strips of 1–1.5 cm and form the desired design from them
Insulate the casing pipe with fiberglass in the place where it will come into contact with the body of the household hair dryer.
Applying fiberglass to the pipe will protect the body of the household hair dryer from high temperatures
Insert the end of the pipe into the body and fasten it with screws.
We insert a pipe with thermal insulation into the body of a household hair dryer and fix it with screws
Assemble the upgraded hair dryer by bringing the wires from the ends of the spiral to the back of the tool. There should be three wires that need to be connected to the mode switch terminals.
Due to the removal of the thermoelement, the body of the device is protected from high temperatures

Video: making a do-it-yourself hair dryer from an old household

After converting a household hair dryer into a construction one, you need to check its operation. Tests are required to ensure that the device is functional, suitable for repair and construction work, and to assess the effect of higher temperatures on elements remaining from the old design.

Video: testing a modernized household hair dryer

How to calculate and wind a spiral for a hot air gun

To make a building hair dryer with your own hands, you need to be able to calculate a nichrome spiral, that is, determine how long a wire of a certain section will be required in order for a spiral made from it to give out a certain power. This indicator determines the duration of the continuous cycle of the tool, and, accordingly, the ability to perform large amounts of work. Depends on power and heating temperature. But it will also be influenced by other technical parameters of the hair dryer, for example, the performance or volume of air supplied per unit of time (usually per minute).

Calculation of the required length of nichrome wire

Having decided on the required power of a technical hair dryer, and for homework it can be from 800 to 1500 W, it is necessary to calculate how long you need to take the wire for winding the spiral. To do this, you need to perform a series of sequential calculations:

Determine the current by dividing the power by the voltage. For example, if you need to get 900 W of power from a 220 V household electrical network, the current should be equal to I \u003d P / U \u003d 900/220 \u003d 4.09 A.
Calculate how much resistance the spiral should have. Why divide the voltage (U) by the current (I). We get R \u003d 220 / 4.09 \u003d 54 ohms.
The length of a nichrome wire with a resistance of 54 ohms is determined from the formula R = ρ L / S, where R is the resistance, ρ is the resistivity coefficient of the material (for nichrome it is in the range of 1–1.2), and L and S - length and cross-sectional area of the wire. Let's say the wire diameter is D = 1.00 mm. Then its cross-sectional area will be equal to S = 3.14 D 2 /4 = 0.785 mm 2. Therefore, the wire length is defined as R S / ρ = 54 0.785 / 1.1 = 38.54 m.

The thinner the wire, the less it will be required to make a hot air gun of the same power. The data obtained by calculation must be verified in practice. After all, the wire may have deviations in chemical composition or uneven thickness along its entire length. Before cutting it off from the bay, you need to measure the resistance of the measured piece with an ohmmeter.

Nichrome spiral winding

In order to wind a spiral from nichrome wire, you must first determine the length of the cylindrical rod or tube on which you will wind it. This is quite simple to do, knowing the diameter of the spiral and the length of the wire that will be required for this. Be sure to take into account that after winding the rings, the spirals are slightly springy, so its diameter will turn out to be slightly larger than the size of the rod.

Having decided on the length of the rod, you need to make the simplest fixture. There are several types of such devices. For mechanized winding you will need:

Semi-circular grooves are cut in the bars, forming a hole of sufficient diameter to fit a winding rod with wound wire. The rod itself is inserted into the drill chuck, and a nichrome wire is fixed at its end. The structure is clamped tightly enough in a vise to hold the bars and allow the wire to pass between them when winding.

For manual winding, the same principle is used, but instead of a drill, a wrench is used, and the free end of the mandrel is enclosed in a bearing surface with a bearing. You can slightly modify the design by removing the vice, and support the winding rod on the bearing assembly from both ends.

Video: manual winding of a nichrome wire spiral

When winding a spiral, you need to follow some rules:

winding should be carried out without stopping and without loosening the thread tension;
do not guide the thread with your hand, but only with wooden blocks to avoid serious cuts;
avoid bending the wire, which may not break right away, but will burn out very quickly at the place of the bend;
it is necessary to choose the length of the rod for winding with a margin and taking into account the possibility of fixing it in a vice or on supporting surfaces.

When winding, the turns should be laid tightly to each other. It is better then to stretch the spiral to the desired length.

In order to make a building hair dryer with your own hands, complex fixtures and tools are not required. You just need to be smart and come up with the most convenient design. It is desirable that your homemade product be made taking into account the needs that have arisen, as well as based on its use in the future. After all, a hot air gun will certainly come in handy for you in the future for the production of construction, repair or installation work.

When you need to warm up something or unsolder some part on the board, you often call friends and acquaintances in search of a special device. Why strain your friends with your requests, if you can make a blow dryer yourself and decide for yourself whether you will give it or not.

We suggest watching our video, which will describe how you can make a blow dryer at home.

For work we need:
- a cooler taken from an old computer;
- a tube;
- a heating element;
- power unit;
- the wire;
- piece of wood;
- spiral.

The design is very simple, there is a spiral in the tube that heats up.

A cooler is needed to supply air to this tube.

The power supply, which is connected to the outlet, has two switches, where one is responsible for the maximum temperature, and the second for turning on.

The operation of the heating element can be tested on an aluminum wire. If you did everything right, the wire will completely melt in 1 minute.

Of course, you can buy a soldering station, but it will not work in all cases.

Even if you reduce the temperature on the spiral, it will still keep the heat.

To repeat such a hair dryer, use only ceramic tubes.

The stand is made from a piece of metal for the legs and from an ordinary piece of wood. You need to bolt the legs to the piece of wood, which will hold our heating element.

Using your imagination, you can independently repeat such a hair dryer at home.

Despite the fact that amphetamine is classified as a soft drug, and it is even allowed in many countries for use, possession and even distribution, it is one of the most dangerous substances. This classification only says that amphetamines are not physically addictive compared to the so-called hard drugs, but they should not be underestimated. Mental addiction to these drugs is so great that it often leads to their systematic use, and it, in turn, causes harm to the body, incomparable with any other substance. Recently, the use of amphetamines has become increasingly common among young people. The situation is aggravated by the fact that at home it is quite easy to find on the Internet, and it is not particularly difficult, and all the ingredients are quite affordable for purchase. Also available for manufacture with minimal skills and methamphetamine at home. Those who decide to make amphetamine at home do not even stop, but it is qualified as one of the most serious crimes, and it is not customary to give any concessions in this case. But the worst thing is not even that. We will not consider cases of manufacturing for commercial purposes - this is a separate disgusting story, we will consider those when people decide to make amphetamine at home for their own use.

Those people who at least once successfully make amphetamine at home are at great risk, and it is their lives. After all, if it worked out once, it will work out again, and after all, this is one of those substances, starting to use which, it is extremely difficult to stop, and for many it becomes almost impossible. If a person begins to make amphetamine at home, then one can say that he is practically doomed: if others need a lot of money to purchase a drug, and in most cases it is their absence that stops the continuous use of amphetamine, then here this drug can always be obtained at any time. quantity. Its constant use for a long time will certainly lead to severe mental disorders, since the body cannot withstand such a load. As the strongest stimulant, amphetamine allows a person to stay awake during the entire time of its action, and sooner or later the psyche fails. Usually, to some extent, deviations appear after a few days, they are associated with the exhaustion of the body and are quite reversible - you just have to eat and sleep properly. However, with constant access to the substance, it is not so easy to do this - after all, you can always remove the accumulated fatigue again and then the changes in the psyche become more and more noticeable and can turn into the category of pathologies up to the most serious forms. But even in the case of only beginning psychoses, a person becomes uncontrollable and prone to which can seize power over him up to a complete loss of control over his actions, especially in the case of the simultaneous use of several substances, in particular, alcohol.

Then comes the turn of physical disorders. First of all, prolonged use of amphetamines contributes to the rapid leaching of calcium from bones and teeth, which leads to their rapid loss. In places of contact with mucous membranes, this substance causes persistent lesions - for example, cases of destruction of the nasal septum are very common. Also, this substance is extremely destructive to the liver and kidneys. Yes, and other organs suffer from it for one reason or another, both as a result of the general rapid wear and tear of the body, and because of the direct effect of this substance on them. Aren't these all good reasons not to make amphetamine at home after all?

Everyone in the house probably has a hair dryer. This device greatly facilitates the life of the weak half of humanity, but few people realize that with the help of an ordinary hair dryer you can do a lot of useful things. Today we will present you 13 unusual ways to use this home appliance. 1. Peel off stickers and price tags. You can spend hours using a clerical knife trying to peel off a sticker that your child stuck in an exploratory impulse. However, you will definitely scratch wood or glass with a knife or blade. Directing the hair dryer for a few seconds, you can easily get rid of this misunderstanding. Hot air will instantly melt the adhesive, which can simply be wiped off with a rag. 2. Are you having trouble adjusting the arms of your plastic eyeglasses to the shape of your head? Do not bend them with your hands, your effort will only break them. Direct a stream of hot air to the plastic and then easily, like plasticine, bend it. However, we do not recommend doing this with expensive designer glasses. 3. Hardened wax on wooden, and especially polished, furniture can turn into a hostess's nightmare. Heat the wax on a medium heat hair dryer until it starts to melt, and then easily remove with a rag. 4. Do you want to make your cake or pastry extra special? Heat the icing with the hot air of a hair dryer and it's ready to serve! 5. Accidentally splashed water on your clothes? Remove the wet part of the clothing and hang it in the dryer. Then turn on the hair dryer and dry the wet spots in seconds. 6. It is unpleasant when the bathroom mirror sweats from steam. Direct a jet of hot air onto the glass and you can continue to dry your hair. 7. The hard drive attracts dust. In order not to buy a special vacuum cleaner, use a regular hair dryer. The air flow will be able to reach the most secluded corners of the house. Use this technique also for woodwork, paintings, bookshelves, lamps, and so on. 8. If you need to apply warm compresses, point the hair dryer at a wet towel. So you will always maintain the desired temperature, which is very convenient. 9. All children love to draw on the walls. If this happened to you, don't worry. Pencils are made using wax. Point the hair dryer at the "drawing", wait a bit and wipe it off with a damp cloth. 10. Hairdryer will help you out in a snowy winter. To dry your shoes quickly, point the hair dryer at them. And in your house there will be no streams from melting snow. 11. If your glasses are frozen because you did not have time to close them tightly or there are cracks. Take a hair dryer and defrost them easily. 12. Girls know how long nail polish takes to dry. And if you need to act quickly, turn on the warm air and gently dry your nails under a hair dryer. 13. Do you need to defrost a piece of meat or peas urgently? Take a hair dryer and do it in a matter of minutes. This is much safer than microwaving, where the middle is usually frozen and the edges are already cooked.

A building hair dryer can be attributed to the category of tools that are not among the essential tools, for sure. Just think, a hair dryer is like a hair dryer, what is the use of it - it is expensive, but all it does is heat the air. Some girly fun. But let's not jump to conclusions.

What can a building hair dryer do?

Most likely, each of us has already encountered a situation where the best device that could solve the problem would be a hair dryer. Out of ignorance, we sometimes do a whole bunch of extra gestures, and a hair dryer would help solve everything in a matter of minutes. After reading the article, we hope that many will change their attitude towards the device. It may well be that they will even think about how to make a building hair dryer with their own hands. Our task is to provide an evidence base that every decent owner should have a building hair dryer at hand.

Having learned about its capabilities and areas of application, it is impossible not to change your mind about a hair dryer as an essential household appliance. Let's start with the practical scope, but it will be very difficult to form a complete list. So, a hair dryer will help:

And fire up the grill. Earnestly? That's the same. These are far from all areas and ways of using a building hair dryer - only when repairing a car can it be used in almost all operations, from decorating to soldering plastic bumpers and body kits.

The theoretical choice of building hair dryer

If we managed to convince you of the need to buy or make a building hair dryer with your own hands, then you should know some features of choosing this useful device in terms of parameters, characteristics and design.

In addition to the power and the generated temperature, it is no different from a household hair dryer. Its main working bodies are the fan, the heating element and the nozzle itself, which must be equipped with a large number of interchangeable nozzles. The more, the wider will be its scope.

The hair dryer should also have several temperature settings for different types of surfaces and different jobs. It is desirable to have smooth temperature change modes, since each material requires its own temperature at which it is processed. Many models have overheating protection systems, they are quite simple and consist of a temperature sensor that turns off the heating element when the set heating temperature is exceeded.

Nozzles are the main working body of the hair dryer and an indicator of its functionality. Special nozzles are used for

simple distribution of air in a given plane;
protection of glass from overheating;
reflections of warm air;
decrease in air temperature.

This is the minimum universal set of nozzles, but there are many more, as you can see from the photos that we have selected for you. Now about the main thing.

Making a building hair dryer with your own hands

To assemble a simple building hair dryer, we need:

We disassemble the household hair dryer and carry out its modernization. We remove all plastic parts that can undergo melting, replacing them with ebonite or textolite. We remove the old heating element and wind a new nichrome spiral - the more turns, the higher the temperature will be.

Nichrome is not soldered, so we fasten the ends of the spiral to the transformer wire and isolate them well. In this case, it is necessary to make sure that the airflow is turned on first, and then the heating element. We collect all this in a case and be sure to put a heat insulator on the handle of the device. Now you can take construction gloves and bench test the hair dryer.

Of course, we will not succeed in such a hair dryer as Makita, Bosch or Skil sell, but our home-made device will definitely have minimal functions.