The heat gun is an excellent solution for rapid heating of rooms, residential, domestic, technical and agricultural purposes. In addition, these devices often use many dacms and builders as an alternative and additional source of thermal energy. Also well showed thermal guns to solve problems with high humidity in garages and basements.

Despite the relatively small cost and a large selection of heat guns, many residents of villages, daches and just craftsmen prefer to create such equipment with their own hands.

Independent assembly of the electric heat generator

The assembly with your own hands begins with the preparation of the sketch of the device, the selection of the necessary parts and tools. In addition, it is very good to replenish your luggage knowledge of electrical engineering, concomitant, and physics. These knowledge will not be superfluous when independently assembling a heat gun.

Materials that will be needed to create an electrical heat generator:

• A galvanized metal sheet, a thickness of 0.7-1 mm or a pipe from a similar material, a diameter of approximately 25 cm. The pipe will be the housing of the heat gun, so its diameter is selected based on the magnitude of the impeller and the sizes of the Tan.
• Electric motor with impeller. You can purchase any trimming channel fan in the nearest specialized store, and you can successfully use the engines with an impeller from the old vacuum cleaner.
• Heating element. A simpler and safe option will be the use of finished tubular tens from the old electric furnace, with a capacity of 1.5 - 2 kW. This heating element at the factory was granted a form of a helix, which will greatly facilitate work.
• Copper cross section 2 mm 2, ceramic insulator, switch, cable with power plug, 25 A fuse for heating element.

Tools for assembling the electric heat gun do it yourself:

1. Riveting machine.
2. Drill with drills.
3. Passatia.
4. Screwdrivers.
5. Insulating tape.
6. Soldering iron.

We start assembling. From the galvanized sheet, bend the pipe and fix it with rivets. This will be a thermal gun housing. To install a TEN to a ceramic insulator and mount it inside the housing from one edge. On the other side of the case, with the help of regular fasteners install a fan. After that, with the help of wires, connect the TEN and the fan to the network wire, the switch, handling the preservation of the fuse.

Important!
When assembling, you should be careful and follow safety. Incorrect assembly of such an apparatus may cause electricity damage to electricity and injury.

Such a heat gun will have sufficient power, for heating a small room, with an area of \u200b\u200bup to 20 m 2.

Council
The body of this homemade shelter cannon may be heated, so it should be foreseen to support their heat-resistant material.

Independent assembly of diesel heat generator

A homemade diesel thermal gun consists of three independent designs - this is a body or a device casing, a fuel tank with a pump and a fine filter and combustion chamber. As a rule, the fuel tank in such devices is located at the bottom of the device.

The combustion chamber is a thick-walled pipe, it is half a smaller in diameter than the body, with a hole under the nozzle on one side and the smoke slot in the upper part. Another independent device that is used in the diesel heat generator is a fan with an impeller. It is this device that will create a directional flow of air that will telete the heated combustion chamber and go out in the form of a hot air jet.

To assemble a diesel heat gun with your own hands, the sequence of actions should be clearly observed:

1. From one edge of the case, the pumping fan of the desired performance is mounted.
2. The combustion chamber with the nozzle fixed in its end is installed in the casing. The combustion chamber can be a galvanized pipe of the desired diameter, sealed on both sides and with the technological holes for nozzle and chimney. Do not forget about the installation of the combustion in the combustion chamber. It is best to use the factory option that can be purchased in specialized spare parts stores.
3. Fuel tank (best take ready, desired size and capacity) should be placed 15 cm below the case. In the obtained space, you need to fix the high pressure fuel pump (TNVD) and the fuel filter of fine cleaning.
4. At the next stage of the assembly, you need to connect the nozzle with the pump and the filter with a red-based annealed tube, which will be fuel. In addition, you should connect the fan through the dimmer to the household power supply. This device can not be used, but it will allow you to adjust the temperature of the heated air using the frequency of rotation of the fan blades, without increasing the fuel consumption.
5. Next, you should welcome to the combustion chamber with a chimney pipe, which will remove the products of the combustion of diesel fuel.
6. The obligatory stage in the assembly of such an apparatus is an inspection by a specialist of the finished model. As a professional, you can invite a familiar Motorist from the nearest car service.

Important!
Do not use the device you collected without supervision and for heating closed rooms.

Tip:
The diesel heat gun, assembled with her own hands, is a powerful and fairly dangerous heat generator. If you do not have sufficient knowledge and experience, it is best to use the factory device, with built-in overheating protection and flame control.

Self assembly of the gas heat generator

Many "Kulibins" are asked: how to make with their own hands, for rapid heating of the garage or country house. There is nothing difficult in this, it takes a little diligence, accuracy, the presence of the source materials and the knowledge of the principle of its work.
The principle of work is as follows: Gas comes from the cylinder into the combustion chamber, equipped with a burner. Burning gas heats the combustion chamber. The air supplied by the fan envelopes the combustion chamber, thereby heats up and, outgoing, lifts the temperature indoors.

For the manufacture of heat carcass on liquefied gas, it will be necessary:

• Pipe for the hull with a diameter of 180 mm and 1M length.
• Pipe for combustion chamber, 80 mm diameter and 1 m long.
• Gas-burner. As it, you can use any burner from the gas boiler or independently modify various burners for collet cylinders, in abundance sold in our stores manufacturers from Middle Kingdom. The main thing is that the burner is equipped with piezoejig.
• Fan. For such work, any axial fan with a round flange for fastening in the gun body is suitable.

Homemade gas thermal gun is going like this:

• On the sides of a thicker pipe (body) from the opposite sides, two holes are made. One, with a diameter of 80 mm for welding the nozzle of the outlet of warm air. The second hole, with a diameter of 10 mm for the burner to which the gas hose will be connected.
• The combustion chamber is made from the pipe of a smaller diameter. For the hard attachment inside the case, it is necessary to welcome several plates that will be centered by the combustion chamber.
• From the metal sheet, cut the plug, on the diameter of the housing and with a hole for the combustion chamber. In fact, the plug will close the resulting clearance between the body and the combustion chamber. Further, everyone should be collected together, to weld the ribs of the combustion chamber to the inner surface of the case, breed the nozzle to exit warm air and the plug on the body from the outlet side of the air flow.
• The next step will be the installation of the burner into the combustion chamber and its hard fasteners.
• Installing the fan should not cause any difficulties. Usually they are sold already with regular fastening or holes in the flange.

Now it remains to connect the fan to the power grid and apply power to the piezoelectric element. You also need to connect the gas hose to the burner, carefully fixing it with a clamp. After all the preparations and checks made by their own hands, the gas thermal gun is ready for use.

Which is often used for drying basements and garages, heating warehouses, they are also used for unfinished structures. This device you need in everyday life can be quite used with your own hands, only it is necessary to first decide on the choice of fuel.

How to make an electrical option of a heat gun?

It is considered the simplest design among the available options for such devices. It does not require much costs for its manufacture. When it is used, no harmful substances are distinguished.

The heating element of the instrument is the air shade, which repeats the bends of the case.

The design of the cannon is a hollow cylinder, on the one hand the fan is located, and with another electric - TEN. Passing through it, the air heats up and enters the room. Such a device can be used in any closed room, which provides electrical outlets.

For the manufacture of heating apparatus, you will need:

• spiral of any heating device. There may be the one that is located on the old electric tile or iron;
• fan;
• asbestos tube or sheet metal for heater housing;
• switches;
• terminals;
• electric motor low power;
• wires;
• pads for fastening spirals.

Progress of work:

• Crop the spiral to strengthen its heat transfer.
• Secure the spiral in the asbestos pipe from one side of it, and with the second - fix the fan.
• Attach the wires to the spiral that will connect to the network.
• Connect a deostat that regulates the degree of heat.
• Wear a propeller on the electric motor and build it into the pipe.

The supply of fan and spiral is performed separately.

How to make a heat gun from the girlfriend, you can see on the video:

Making a gas heat gun

As well as the previous version, this design has a cylindrical body made of metal. According to the laws of aerodynamics, the round section is optimal, and the metal has a high thermal conductivity, due to it, the heated air is transmitted from the case to the room.

Guns are divided into two types:

• Direct heating . Inside the cylinder is a gas burner with a round cross section, it is blown from all sides by a fan. Heat on the outlet is mixed with combustion products and goes through the gun body from the opposite side. It turns out that gases also enter the room that many housing owners are not satisfied. Such devices can be used only in the garage, shops or housekeeping with large areas, where they cannot harm the person.
• Indirect action . It has an embedded system of indirect action, which separates flue gases, heat from them is transmitted to blowable air in a specially provided heat exchanger. Thus, the gas and air are not in contact with each other. Air after heating leaves the heat exchanger through the second opening in the housing. The burned foods are distinguished through the side nozzle attached to the chimney tube.

Power of such a device occurs with liquefied gas. It is impossible to connect it to the central highway of gas supply without appropriate permissions. Control over fuel supply is carried out using a gas valve that guarantees the safety of the device.

The progress of the gas gun is the following:

• Lengthen the gas burner using a suitable diameter pipe.
• Increase the burner hole by 5 mm, as well as a 2 mm gas hole.
• Make a heat exchanger, it should be in the form of a pipe, in one of its end to start the extension from the burner.
• Secure the design of the clamps.
• Cut hole hole for the exit of hot air into the room and welcome the pipe of the desired diameter to it.
• Install from the opposite side of the pipe fan.
• Drive a hole for inciting fuel. Provide adjusting valve.

Having the necessary skills and focusing a bit in the work of the gun, you can create it from the existing materials. One of these devices is presented in the video:

Heat diesel gun do it yourself

For those rooms, where there is no possibility to carry out electricity, if necessary, heaters are used during the cold period, heaters are applied on diesel fuel. The model of such a gun makes it harder than previous species, but following step-by-step instructions it is quite possible, only you need to have the initial skills of the welding business.

The diesel cannon consists of two buildings:

• the lower tank is designed for fuel;
• the upper device serves a combustion chamber that ends with a fan.

The fuel during combustion heats the air, which through the fan enters the room. For the work of the latter, the installation of the electric motor is provided, the power to which is supplied separately.

The progress of the diesel gun:

• Run the bottom case. It must be at a distance of no more than 15 cm from the top. So that it does not overheat, it is necessary to choose a low thermal conductivity material. If there is no appropriate, you can take a metal tank and wrap it with heat insulating material.
• Make upper housing. For it, a segment of a wide steel pipe is suitable. Secure in it a nozzle with the fuel pump. At its ends, install protective nets.
• Make a combustion chamber. Its installation is carried out in the center of the upper case of the gun. The chamber is performed as a metal cylinder, the diameter of which is selected by 2 times less than the size of the housing.
• Install the connecting tube through which the fuel supply and its ignition will be carried out, the filter is installed after it.
• Swelling the vertical tube through it will be output from the combustion of diesel fuel.

Such an unit is designed to heat the room at 600 m2, it will take about 10 liters of liquid fuel to refuel it.

Heat gun on firewood with their own hands

The assembly in question is made of an old gas cylinder, which retains its usual horizontal position, with a separate chamber for heating the air supplied to it forcibly.

The work of the heat gun is as follows:

• Fuel is loaded into the combustion chamber.
• As soon as the air heats up, the fan will turn on, which will be connected to the pipe of the heating chamber with the mountain.
• There is a horizontal partition inside the balloon, due to the fact that it perceives the greatest heat load, the air heats up fairly quickly.
• Hot air coming from the second nozzle will be able to heat any point of room.

The injection device in this device is a fan, the choice of which depends on the area of \u200b\u200bthe room: a cooler is suitable for a small room in a computer system unit. For medium-sized housing dimensions, household fans located in hoods can be used.

The progress of the gun on firewood:

• Cut from the balloon the upper part, you need to perform by welding seam. For a more powerful design, it is necessary to cut the top below the welding seam. Before that, you need to unscrew the valve, and that the remaining propane does not explode, fill it with water. If this is not executed, then work with the grinder will be dangerous.
• Making additional details. Cut from metal circle of about 300 mm, it will perform the role of the partition. For the door you need to perform the frame in the form of a strip of 80 mm width. If the material remains, then you can cut small stripes from it, which will go for heat exchanger ribs.
• Perform a grate grid, customizing the length of her rods under the size of the cylinder, then arrange it in its lower part.
• Crop the openings to install the boot door. The framing of the door is inserted into them, they are a welded structure of the strips. Pre-prepare the doors, welding a loop and handles to them.
• Make an air chamber. Prepared metal circle to lay instead of a cut upper part and welcome tightly. Attach the fan in it and breed the ribs.
• Install chimney nozzle.

Thermal gun on spent oil with their own hands (video)

Even the liquid already used can be an excellent fuel for the heating apparatus. The given video discusses such a device in which the Babington burner principle is used:

A homemade gun is a heat exchanger in which there are two doors: one in the front of it, and the other in the side for cleaning the camera. A whole system for purging is connected to it, the standard fan No. 2 is used for it. After heating inside the aircraft chamber, the air is supplied to the room temperature from 60 to 90 degrees.

The modular system of the unit makes it possible to replace any node without dismantling the entire design. It is manually inciting the stove - so that it worked, you need to create an optimal pressure equal to 1 to 3 kg / cm2. The video of the ignition and combustion of the gun is demonstrated on the video.

All the above options for performing heat guns can be done by itself, if there is a desire and necessary infridable materials. They will effectively be able to heat any housing, the main thing is to choose an option on an accessible fuel so that the heating occurs economically.

Like the "Gas gun of Evdokimov". This is a very efficient and useful device when you need to quickly heat the room during the cold season. Among other things, such a gun is capable of working autonomously, for its operation there is a fairly automobile battery for 12V, as well as a gas cylinder. But lovers of such homemakers did not stop at this and decided to make this device even more efficient. The article will consider the option as you can improve a similar device.

The most important thing is that now appeared at the gun - it is a damper that makes it easier to start and control the device.

Materials and tools for manufacture:
- asbestos cord;
- welding;
- Bulgarian;
- metal plates;
- steel pipe;
- drill;
- gas supply regulator;
- steel rod and so on;
- 220V fan.

Manufacturing process:

Step one. Creating a damper
To make the gun it is convenient to adjust and adjust the heat outlet intensity, it was decided to install the damper on it. It is made very simple. A metallic rod appropriate diameter is taken and a longitudinal cut is made. One end of the rod is bent in such a way that the handle is formed. In the axis itself you need to drill two holes and cut into them the threads under the bolts.

The flap is made of thin-sheet steel, it is fixed with screws. In order for the damper to be opened and closed with some tension, a spring and washer is installed on it.

Step second. Modeling burners

So that the fuel burns better, you need to redo the burner slightly. For these purposes, the author installed a special liner in the pipe 80 mm. As he looks, you can see in the photo.

Step Three. Sealing system
So that from the guns did not go out too much warm, and in vain energy did not waste, it was nice to be good to exhibit. It is about the place where the small pipe comes out of the big one. There is a crack here to close it, you need to make a special cover, it will be attached on self-drawing. Well, as a insulating material applies asbestos cord.

Step fourth. Checking guns
Among other things, the gun was also equipped with a more powerful fan, it is a household propeller for a bathroom that is batched in 220V. The gun is started when the damper is closed, and when stable burning is achieved, the damper can be opened. For arson, a long gas lighter is used.

The experiment showed that the gun is capable of producing hot air with a temperature of up to 70 degrees. Of course, it all depends on its initial temperature. According to the author, such a gun without any problems can pass

Garage Gauge Drawings

Fig. 1. Gas gun scheme: 1 - fan; 2 - Gas burner; 3 - burner extension (pipe 2) 80 mm); 4 - heat exchanger housing (pipe 0180 mm); 5 - the yield of hot air.

Fig. 2. Upgraded gun option:
1 - Gas burner extension; 2 - plates
to increase heat exchange area;
3 - gas burner; 4 - fan; 5 - Air
barrel with lever; 6 - heat exchanger housing.

Basic design nodes: a 12-V fan (can be 220 V), the burner jets are drilled to 02 mm, gas from 50 liters of propane cylinder (domestic), but necessarily need a gearbox from a cutter or other device for adjusting gas. Outside, the burner extension core welded a metal strip to increase heat transfer.

The end of the work on the self-made gas gun was to drill holes in order to light the gas and installing it on small goats made with their own hands.

Principle of operation of the heating gas gun

In principle, nothing complicated here, but we describe everything as in more detail.

1. Thug a lighter to the hole for the ignition.
2. Open gas supply.
3. We light and remove the lighter.
4. Turn on ventilation.

Making a gas gun for a garage with your own hands - Instructions for the photo

1. The iron disk under the extension cord (80 millimeters) was fixed on the burner

2. lengthened the tube on which gas is supplied

3. Made the installation of crossed metal plates to improve heat transfer

4. Made the installation of a clamp at one end of the extensionist - in the subsequent to it attached the heat exchanger

5. Collected the burner

6. Holes did the hole in the heat exchanger so that hot air can go through them

7. At the front end of the heat exchanger tube, the ring for installing the burner

8. At the rear end of the heat exchanger attached the switch for ventilation

9. Fan itself mounted

10. I did a hole to connect gas

11. Normal Chinese lighter (for plates)

12. The process of ignition

13. Balon for 50 liters with propane

14. Gaza for regulating gas supply

© What is the idea and its execution: Nikolay Evdokimov

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The thermal gun seems to be an exotic device to many people, but in fact this type of heaters is already very common. Small models are used in everyday life, powerful - in production. If you are still sure that the heat gun is needed only for the installation of the stretch ceiling, from this article you will learn what else it can come in handy to you, how to distinguish the types of guns and what the specifics of their manufacturer do it yourself.

Purpose and principle of heat gun

The heat gun is, in fact, a powerful fan heater, capable of quickly and for a long time to heat the rooms of large size. Most often, the instrument looks like a thick short pipe based on that and causes associations with a cannon. The heat source can be stationary or mobile (in a lightweight version for transfer or on the basis of wheels).

Most heat cannons really resemble a cannon, but many can be cubic

Thermal guns are necessary for:

• episodic rapid heating of rooms (for example, construction objects for fast drying plaster, grain / vegetable stores to reduce humidity);
• rapid heating room for performing specific works (for example, installation or repair of stretch ceiling);
• performing technological operations in industrial buildings;
• seasonal heating of non-residential premises, not connected to heat trap (for example, greenhouses, hangars, warehouses);
• permanent or temporary long heating of residential premises, which cannot be connected to other heat sources (for example, cottages and country cottages).

In everyday life, low-power heat guns helps to heat the car frozen on the parking lot, dry the caustion during the spring floods, to provide a comfortable temperature in a late autumn conversation, etc.

In the workshop, the heat cannon will provide comfortable conditions for the employee and the optimal storage conditions for the machine

The principle of action of thermal guns is almost indistinguishable from the method of operation of a conventional fan heater. Thanks to the heat generator (Tan, spiral or burning fuel), it heats the air inside the body and due to the fan distributes this heated air throughout the room.

Thermal guns with a cylindrical terminal casing, and squares are better suited for zonal heating.

Types of thermal guns

Thermal guns are divided depending on the type of heater used. In general, the electrical is different (they work when connected to the power grid) and burner (consume energy of the combustable fuel) instruments. But when you purchase you will help you will help more than a detailed classification. Thus, electrical can be bean, infrared or spiral, and burner gasoline, diesel, gas or work on combined fuel. For them, it is usually not indicated by a clear destination, but it is important for your own security to understand that the burner heat guns are better suited for non-residential premises, and electrical - for episodic works. The comparative table will help you in more detail in this matter.

Table: Comparison of thermal guns with different methods of heating

Type of thermal gun	Dignity	disadvantages
Electric (TEN, spiral, ceramic heater)	Suitable for residential rooms and adjacent rooms, since it does not highlight harmful gases. An excellent mobile version, because it weighs little (does not require a thick-walled body) and can be connected in any room with a socket. Does not burn oxygen, so it does not require ventilation during operation. Models with ceramic heating elements are most secure for users and do not worsen air quality. Products do not require constant control or replenishment of fuel reserves, capable of working long and evenly. Electric guns are quiest, noise is publishing only a fan.	The tan and the helix are dried by air, so in places of permanent accommodation requires a moisturizer. During operation, there is an unpleasant smell due to dust and aerosols. The power and efficiency of the device is less than that of the burner analogs. Models with a spiral heater require cautious circulation, since it is very hot. When operating the device without a protective grille, you can get a burn. The most powerful varieties require connecting to a three-phase network, so they can be applied either in enterprises or in specially equipped workshops.
Gas	It is capable of obtaining a coolant from both the highway (stationary option) and from the cylinder (mobile version). The balloon is easy to focus on any gas station, the device works with and propane, and butane (for comparison, gas installations are calculated on a specific type of fuel in cars). The device economically spends electricity, since it is only needed for fan operation. Gas models are the most efficient from liquid fuel, fuel is used by almost 100%. The devices are considered optimal in terms of price / quality ratio, but only when used in non-residential premises.	Gas combustion products can fall into the room, but they are safer than using other liquid fuels. The heat gun can work incorrectly, or not to work at all, if the power of the device does not correspond to the pressure in the pipeline / cylinder. It is unacceptable to use the device without supervision. The stronger frost, the longer it goes to the desired gas gun mode.
Diesel, gasoline	The most powerful type of heat-air generators (10-100 kW) with the maximum possible heating temperature. Manufacturers offer a wide range of devices with closed and open combustion chambers and even varieties that allocate infrared radiation. It is possible to use different types of liquid fuel, including solarium. It is not afraid of water from entering (unlike electrical analogs), it is possible to install under a canopy or open-air.	Enters the increased requirements for ventilation of the room due to oxygen consumption. It smells unpleasant and noise in the process of work, so suitable only for construction objects and other premises, where people do not spend a lot of time.
Oil	Instruments are similar to liquid-fuel heat guns, only in the combustion chamber they use oil, including exhaust lubrication of industrial equipment. Allowed to utilize the materials that have become unsuitable, so the most in demand in factories and factories, agricultural enterprises.	It does not work on high viscosity oil (more than 90 in SAE), as well as transformer cooling oil. Consumes oxygen, highlights many harmful gases and soot, which makes it almost impossible to use models of direct heating.
Water (calorifer)	Calorifer (water heating battery with a fan) is sometimes called water heat powder. Such models are installed inpatient, as they require a connection to water heating at home. Kalorifers do not distinguish harmful gases, consume very little electricity, are not able to inflict burns or cause fire, suitable for installation in residential rooms. In use, they are much more effective than ordinary radiators, since the fan increases the intensity and heat transfer rate.	It is impossible to install in the house where there is no centralized hot water supply (for example, in the country). There are no mobile models.
Infrared	The thermal guns of infrared type are operated by electricity, but differ from the above-described models in the method of heat propagation. If, in other varieties, the coolant performs air injected with a fan, the infrared gun highlights thermal radiation that heats the objects in the room. IR rays are completely safe, in the same way heat highlights the usual radiator. IR guns do not need a fan, so they work quieter than the rest. The principle of operation of infrared heat cannons makes them as efficient as possible, at the stage of heat transfer to the object, the energy is almost not lost. Since the heating from the IR heat gun does not depend on the movement of the air, it can be used in the outdoors (for example, heating the scene with winter performances) and in rooms that need enhanced ventilation (for example, chemical laboratories and carpentry workshops). IR guns are characterized by simple design and light weight, they are very mobile.	Only those objects that fall into the zone of action of the emitter are heated, in the blind zone of the device will be cold. Therefore, in a large room, it may be necessary to establish several devices.

Inpatiently installed in the room the heat gun without the consent of the controlling organs, it is possible only if the device is electrical or diesel. Gas models belong to explosive, so their operation is possible only after the security control service is permit.

Since burner heat guns are dangerous due to fuel combustion products, safer varieties of such devices have appeared on the market - indirect heating guns.

As can be seen from the scheme, the main difference in the design is the presence of a chimney pipe

As already mentioned, burner or liquid fuel heating devices are divided into:

• punches of direct heating are devices in which the heated air is mixed with combustion products and spreads throughout the room. During operation, carbon monoxide is released, so they cannot be used not only in residential rooms, but also in places of long-term accumulation of people (for example, a working workshop at the enterprise). In the room where the heat gun is direct heating, there must be powerful ventilation, it is needed both for the removal of harmful gases and to improve the operation of the gun itself (oxygen is burned when combustion, it is necessary to customize the new one). The direct heating cannons are often used in the garages, since they are very economically consumed fuel, efficiency over 99%.
• punches of indirect heating are equipped with a heat exchanger. This means that a heated mixture of air and harmful gases in the burner transmits heat air in the room without mixing with it. At the same time, combustion products fall into the chimney, which levels the danger to people indoors. The thermal gun of such a design can be installed in the enterprise or in the garage without powerful ventilation. But the efficiency of such devices is significantly lower, as part of the heat is inevitably goes into the pipe.

Having a desire and some experience of repairing heating devices, you can build a thermal gun of any kind: electric, liquid, water. Difficulties may arise except with infrared, since it uses more complex components.

If you plan to put a direct heating in the garage, use only a model on gas or biodiesel and be sure to turn on the ventilation. The combustion products of other fuels are more dangerous and will inevitably have a harmful effect on health.

What elements are the heat gun

The heating appliance is collected from such components as:

• the housing, which is a short diameter tube, sometimes a cube or prism. The walls of the housing are often thick-walled (in electrical models, especially mobile, the wall of the body is thinner, in the burner-power). Material is metal, fire-resistant plastic or ceramics;
• heating element (TEN, spiral, or burner). It is the power, efficiency and safety of the device that depends on it;
• fan for efficient air exchange. It is much more powerful than domestic, so it will not be possible to redo the usual fan heater to the heat gun, even with a good heating element of the efficiency of such self-made, it will be lower below;
• automation with wires and power on, off, power adjustment buttons. The control unit must be reliable, and the conductors are quite thick, otherwise the device will quickly fail;
• protective metal grid, which does not allow the user to touch the heating element. It also prevents large combustible objects to the device.

Such a structure is characteristic only for electrical heat guns with a spiral

In a good heat gun, there must be a thermostat - heating limiter capable of checking the current temperature and turn on / off the device on time. It helps to efficiently use the device and electricity / coolant, as well as extend the life of the device itself. The lack of a thermo-programmer can cause a fire in the warehouse or the death of plants in a greenhouse or a greenhouse.

Calculation of the power of the device

For the gun to be as efficient in your room, you need to first calculate the minimum power of the device using the formula.

Qt \u003d V × Δt × k / 860, where

• QT is the minimum power of the heating device in kW / hour;
• V is the amount of heated room in m 3;
• Δt is the difference between the minimum temperature on the street and the desired temperature in the room in the C;
• K - heat loss coefficient:
  • 3.0 - 4.0, if the structure is not thermally insulated;
  • 2.0-2.9, if there is ineffective thermal insulation;
  • 1.0-1.9 with medium-level thermal insulation (wall thickness of 2 bricks, little windows, simple roofing without opening);
  • 0,6-0.9, if the thermal insulation is good (the walls are insulated, there is a contour seal of doors and windows, double-glazed windows).

If your room is not a production (the height of the ceilings is not higher than 3 m), you can use the data from the table.

Table: Dependence of the required power of guns from the area of \u200b\u200bthe room

Power heat gun, kW	The size of the room in the new house, m 3	The volume of rooms in the old building, m 3	Area of \u200b\u200bmodern greenhouses with heat insulated glass, m 2	Square of glass greenhouse without heat insulation, m 2
5	70–150	60–110	35	18
10	150–300	130–220	70	37
20	320–600	240–440	140	74
30	650–1000	460–650	210	110
40	1050–1300	650–890	300	150
50	1350–1600	900–1100	370	180
60	1650–2000	1150–1350	440	220
75	2100–2500	1400–1650	550	280
100	2600–3300	1700–2200	740	370
125	3400–4100	2300–2700	920	460

Necessary powerful heat gun in a small room can cause a fire. Use appropriate power devices (or with a regulator) and / or leave them without supervision.

Making options with their own hands

The heat gun is a powerful device requiring responsible appeal. If you have not had the experience of repairing such products, the manufacture is better to start with electrical models. They are simpler and safe to use, especially if you connect the device to the network via the RCD. In the worst case, the homemade will not work, or will come into disrepair any of its elements. But to arrange a fire or an explosion, which often happens when using liquid-fuel homemade guns, it is rather difficult with the electrical model.

For the first few days, do not leave the homemade heat gun to work without supervision. Even if you have a lot of experience in creating such devices, it is better to be restrained than to correct the consequences of a random error.

How to make an electric thermal gun

The construction of the heat gun can be divided into mechanical and electrical parts.

The design of the electric thermal gun is simple and understandable, which is optimal for beginner masters.

To collect mechanics you will need:

• thin-walled pipe of a suitable diameter for the housing or tin from which the body of the desired size can be bent;
• heating tang of calculated power or several Tannes with a suitable total power;
• fan (motor with impeller assembly) with a power corresponding to the chosen to theta;
• ready base-support, legs or fittings, from which you can cook with support;
• tube with fasteners performing the role of carrying handles (optional);
• protective grids (the diameter must correspond to the cross section of the case) or the wire from which the grille can be soaked.

For savings, you can use parts from the old technology, you only need to make sure the part and clarify its power.

Do not use asbestos-cement pipes as the electrical heat casing, they often explode with strong heating. The most secure analogue is a ceramic pipe for chimney.

Electric thermal gun unit will be:

• switches to change the mode of operation of the device (average heating power, full heating, only fan);
• the thermographer, preventing the device overheating (will not allow breakdown and fire);
• thermostat that helps control the heating degree of air;
• wires for connecting parts (specify the section when buying, if you can not pick up yourself);
• cords with plugs under 220 V (2 pcs., Mandatory with grounding).

Important: The engine of the heat gun fan and its heating element are connected to the power grid separately.

Instructions for the manufacture of electric heat gun do it yourself:

1. Secure the heating element in the front of the housing and connect the power cable to theta.

   Round dry TEN for a fan heater with several spirals - the optimal option for homemade heat gun

2. In the back of the case, lock the fan with the motor and also connect the wires to them, output all the wires outside the body.

   If your cannon is low, the fan is suitable from the Soviet vacuum cleaner

3. Collect the electrical control unit, following the scheme applied above. Protect the housing control unit (you can take a food container) and output the power button.

   Carefully monitor the quality of each connection

4. Install protective grilles on the front and rear ends of the case. Install the housing on the legs or database.

   Lattles from the old fan without plastic parts will rise as protective grids for the heat gun.

After assembly, it is necessary to test the instrument. It is desirable that the sockets you use were connected via the RCD. So, in the case of an erroneous assembly of nodes, the power will turn off automatically. If the device works without complaints, you can safely start using it.

Video: homemade electric heat gun

For the assembly of the electric heat gun will not need specialized tools, quite a screwdriver with a bat and a drill. But the creation of the gas analogue is already more difficult, it will be necessary to need a good welding machine.

Making a gas heat gun

If you decide to put a gas gun personally, it is better to make an indirect heating device. Its design is not much more complicated, but it is safer and more pleasant in operation.

If you need to make a gas gun of direct heating, the pipe 5 is not welded, and the front part of the housing is closed with a grid

For the manufacture of a gas heat gun, you need the following details:

• gas burner assembly;
• tolstoyed metal pipe of a small diameter (for example, 8 cm). After welding to the burner, they form a gas combustion chamber;
• thick-walled metal pipe larger diameter (for example, 18 cm), which will become the heat exchanger body;
• fan for air supply to the combustion chamber;
• device of remote gas gas;
• reducer (reduces gas pressure when fuel from a cylinder / highway to the combustion chamber);
• metal pipe with a diameter of 8-10 cm for removal of combustion products. Its length depends on the remoteness of the nozzle on the body from the ventilating hole in the wall wall;
• frame for placement design.

So that the burner becomes suitable for use in the cannon, its hole should be increased to 5 mm in diameter and expand the jetwork (hole for fuel supply) to 2 mm in diameter.

Let's start working:

1. To the gun body, weld the pipe for gases, drill a hole for the ignition of fuel, install the grids and breed the legs.

   If the seam is not high-quality, fuel combustion products will fall into the room

2. Add a pipe-extension pipe to the burner and start it in a pipe heat exchanger, fix the position of metal clamps. You can use 1-2 ready-made ceramic burners, for them you should make holes in the case.

   Ready burners are more reliable than homemade

3. Install the fan, protective grilles, connect the fan power cord.

   The fan is another node that you can take ready for insurance.

The finished device can be connected to a cylinder with liquefied propane or other combustible gas through a gear / adjusting valve.

Important: Carefully seal the connections of gas pipes, and be sure to install the remote ignition device. If you do not adhere to the rules, the installation of heating can explode.

Video: Gas heat gun indirect heating with their own hands

Production of diesel or gasoline heat gun

A gun working due to the combustion of the solarium (diesel) or other type of diesel fuel is different from the electrical availability of the fuel tank. At the same time, the more tank, the longer the gun can work without refueling.

Due to the large fuel tank, a diesel gun is heavier than gas and takes more space

For the manufacture of diesel thermal gun type, you will need:

• fuel tank made of low thermal conductivity material or metal with a layer of thermal insulator and protective casing. If you choose an inappropriate material, the fuel will be heated when the gun is running and the risk of fire and explosion will occur;
• a thick-walled pipe or a metal tank for the main body of the gun;
• the thick-walled pipe of a smaller diameter for the combustion chamber. It should be freely accommodated in the main body so that there remains space for the removal of warm air between the external walls of the combustion chamber and the inner walls of the body. The optimal ratio of diameters of pipes 1: 2;
• the electric motor of suitable power capable of fit in the case;
• fan for connecting to an electric motor. The diameter of the impeller should be at least 1-2 cm less internal diameter of the body of the case;
• fuel pump, filter and nozzle for fuel supply;
• burner with spark plug for fuel igniting;
• air pump, input and output filters for air distribution system;
• protective grilles for the main building.

The above items should be connected to each other as shown in the picture. It is important to observe the distances between the fuel tank and the body, follow the tightness of all chambers and the quality of the electrical components. But if you have never done this work, the design may turn out to be extremely dangerous. Therefore, it is worth using a simplified scheme:

1. Take the stove from the old Zaporozhets or its analogue (the heating device for a car running on liquid fuel) and install it on the base or legs.

   When buying a stove, be sure to ensure the presence of wires and automation

2. Connect the power cable through a transformer from 12 V to 220 V, use a fork and a ground with a ground. If you have an unnecessary car battery or a garage is not connected to the network, connect the device to the battery.

   If in the database make an additional battery shelf, the device will be more compact

As a result, you will get a mobile liquid thermal gun, in which most of the responsible nodes are collected at the factory, and such devices are much more durable and safer self-made.

Video: Assembling diesel heat gun with their own hands

Warm gun on firewood

The heat gun running on hard fuel is a stationary wood heating boiler, only he warms not water, and the air indoors. In fact, this is an ordinary bourgeitogo, which is capable of almost every garage owner. It does not require a complex housing or many electronic components. The difference only in the additional nozzle to which the fan is connected. Therefore, if you figured out how to make an electric or liquid thermal gun, the woodwave will definitely not become a problem.

If you are not sure that you can find high-quality materials and components, or doubt your own welder and electrician skills, seek help to a more experienced person, place an order from a professional or buy a ready-made design. So you will provide your own security and can use a really reliable device.

Features of operation and care

If you want the device to serve as longer as possible, you must:

• use only high-quality fuel (gas, diesel, gasoline);
• prevent strong voltage drops in the power grid (if they occur in your region often, the gun should be connected via the RCO - the protective shutdown device);
• do not allow water to enter the electric thermal gun, and also not to use it in rooms with high humidity (over 93%);
• protect the device from shocks, drops and mechanical loads;
• place the device further than 0.5 m from flammable things, including fabrics and furniture;
• to withstand the period of addiction (from 2 hours) after transporting the device in the cold (below 0 ° C);
• clean protective grilles and housing regularly.

It is unacceptable to cover the working heat gun, put it in the box, or in other ways to interfere with normal air circulation in the device.

Explicit testimony for repair:

• visually noticeable damage to the housing, tubes, wires;
• sparking in places connecting wires;
• repeated protective relay.

Note: Causes and methods of elimination are valid for electrical heat guns

If you purchased a heat gun, more detailed information about its operation can be obtained from the warranty coupon or an attached booklet manufacturer. Those who collected the device will independently familiarize themselves with the rules by finding the instructions on the network for a similar model.

As you can see, with due attention and diligence, you can build a thermal gun that will provide you with comfort in any unheated room.