Operating principle
Such guns are often called fan heaters due to the similarity of the principle of operation, but they have certain differences. They work in the same way as other similar products: air flows around the combustion chamber housing with a fan and heats the room.
The principle of operation of the heat gun
The design of modern guns includes a special sensor that turns off the device when a predetermined temperature is reached, thus significant fuel savings are achieved. Garage craftsmen make guns that can run on different grades of used oil.
Factory-made or home-made, heaters have several very vulnerable spots, so they need frequent repairs. This is cleaning nozzles and filters, replacing the fan and much more. To find out all the vulnerabilities, you need to study the design of such guns.
Important advice! After using the gun and setting it for long-term storage, the remaining fuel must be drained, and the tank must be thoroughly rinsed from the remaining diesel fuel. It is unsafe for the product to use fuels that have been stored for a long time.
General technical characteristics of electric heat guns
The main technical characteristics of such heating devices, on the basis of which the consumer can make his choice and decide whether to purchase a particular model, are the following indicators:
- voltage class - single-phase or three-phase connection diagram of the device;
- electric power, is measured in kilowatts (kW) and determines the ability to connect to a specific electrical network, as well as the amount of energy consumed per unit of time;
- heating area - depends on the electrical power of the device and indicates what area of the room can be heated by a specific model of the heating device;
- performance, is measured in m2 per hour (m2 / hour) and characterizes the area of the room that the heat gun is able to heat during this period of time;
- dimensions;
- weight.
Using the adjusting elements, the required air temperature and its flow rate are set
Product design
Products with an indirect method of space heating have chimneys through which all combustion products are removed, so in practice they can be used to heat living spaces. They are much safer, but they use oxygen for combustion, so ventilation or periodic ventilation is needed. Their power is lower because losses occur through the exhaust system.
Diesel heat gun device
With a direct heating product, all combustion products remain in the room, so they cannot be used where people constantly live. They are used to heat construction sites and warehouses where there is a natural flow of air, because lack of ventilation can lead to carbon monoxide poisoning.
All products are equipped with a powerful metal body: it excludes the ingress of foreign objects that can cause damage or become a source of fire. A fuse must be installed that turns off the device when the case is very hot.
For circulation, a compressor or a small pump is used, for pumping into the room - a fan, which experts consider one of the vulnerable points of these products. A burner and a fuel supply pipeline are located inside the housing.
The main elements of a diesel heat gun:
- there is an exhaust pipe to remove smoke;
- a fuel tank located at the bottom of the product;
- pump or compressor driven by an electric motor.
Device
Electric heat gun device. (Click to enlarge) An electric heat gun is a fairly functional air heater, which contributes to the effective organization of heating of premises for various purposes.
In order to understand how an electric heat gun works, first of all, you need to know the scheme of its device.
This type of heating unit consists of the following structural elements:
- Housing. Typically, this element has the following types of forms:
- cylindrical (the most common shape);
rectangular (more applicable for household purposes).
The outer casing can be made of the following materials:
- durable metals;
- fire resistant plastic;
- ceramics.
- a spiral made of refractory metals;
a system of hermetically sealed pipes filled with quartz sand (also called heating elements).
It is also worth noting that depending on the model of the electric heat gun, the number of heating elements may vary.
Possible problems
As a result of continuous and prolonged operation, the equipment can have a number of problems. Most often, this is not due to the wear of some individual parts, but to mediocre service. Let's analyze common malfunctions of diesel heat guns.
Intermittent fuel supply
The problem may arise due to accumulated dirt in the hoses of the system: development from fuel, oil, foreign objects, etc. This also includes a dirty tank. The malfunction is eliminated quite simply: we drain the fuel, disconnect the hoses and thoroughly rinse all the elements responsible for the fuel supply.
Fuel is non-flammable
First of all, it is worth checking the spark plugs: replace faulty ones, and dry them filled with fuel. It will also be useful to correct the gap between the electrodes if it has increased or, conversely, decreased.
The gun stalls periodically
The air filter is most likely clogged. Considering the type of fuel, it is useless to clean it. It is much more efficient to buy a new one.
Diesel Cannon Air Filter
Sometimes it's all about the quality of fuel: diesel fuel is different. Therefore, it makes sense to try to fill in fuel purchased at a gas station of another brand.
Too low temperature in the heat exchanger
If the flame in the combustion chamber does not burn intensively enough, then the cannon starts to idle. We have to set the maximum level of fuel supply, whereas previously there was enough heat at average or even minimum values.
Most likely, the nozzle is clogged. The element is easily cleaned mechanically. Purge by means of a compressor is ideal.
The gun is overheating
In a good half of cases, the thermostat is to blame. We remove the part, process it from dirt and clean the contacts. In more advanced models, it cannot be repaired due to additional awnings - only replacement.
Popular models of electric heat guns
Heat guns are produced by domestic and foreign manufacturers, therefore, on the market for such equipment, you can choose the model of interest to a particular consumer in accordance with the selection criteria and financial capabilities of the user.The following table shows the most popular models of electric heat guns powered by a household electrical network, and their rating according to the version of the online magazine HomeMyHome.ru.
| Model | Specifications | Advantages of the model | Place in the rating of HomeMyHome.ru magazine |
| "DENZEL DFG01-30" | Electric power - 3 kW; Productivity - 250 m3 / hour. | Ease of use; Reliability and mobility. | 1 |
| Timberk TIH Q2 2M | Electric power - 2 kW; Productivity - 160 m3 / hour; Weight - 3.5 kg. | Compact dimensions; Convenient management; Good heat dissipation characteristics. | 2 |
| "BALLU BHP-PE-5" | Electric power - 4.5 kW; Productivity - 230 m3 / hour; Weight - 4.5 kg. | Mechanical thermostat; Reliable fan; Special coating on the legs. | 3 |
| "SPECS HP-5.000C" | Electric power - 4.5 kW; Productivity - 400 m3 / hour; Weight - 8 kg. | Provides fast heating of premises; The heating elements are covered with stainless steel. | 4 |
| "Roda RP-5C R0010202" | Electric power - 4 kW; Productivity - 400 m3 / hour; Weight - 8 kg. | Heating element made of stainless steel; Low noise level during use. | 5 |
| Hyundai H-HG5-20-UI592 | Electric power - 2 kW; Productivity - 60 m3 / hour; Weight - 1.55 kg. | Affordable cost; Stainless steel fan; Compactness. | 6 |
| "Quattro Elementi QE-3000 ETN 649-257" | Electric power - 3 kW; Productivity - 390 m3 / hour; Weight - 3.2 kg. | Heating element made of stainless steel; There is a ventilation mode without heating and horizontal position adjustment. | 7 |
| "Inforce EH 2 T" | Electric power - 2 kW; Productivity - 400 m3 / hour; Weight - 5.2 kg. | Safety in use; Long service life; Simple and intuitive controls. | 8 |
| "RESANTA TEP-3000N" | Electric power - 3 kW; Productivity - 300 m3 / hour; Weight - 3.2 kg. | Profitability; Stability on a flat surface. | 9 |
| "Tropic TVT-5" | Electric power - 5 kW; Productivity - 400 m3 / hour; Weight - 4 kg. | Mobility; Performance; The presence of three stages of power regulation; Non-marking body. | 10 |
Heat gun maintenance
Diesel cannon of indirect heating
All preventive work on the equipment is reduced to setting up and processing the air intake system, compressor and fuel pump. The procedure for each individual heat gun is roughly the same. Let's look at the details of maintenance using the example of a classic model with indirect heating and automatic flame control.
The design of a diesel heat gun cannot be called complex. The fuel is supplied by the pump to the nozzle, after which it is produced in the combustion chamber. The burner is ignited using a pair of electrodes. The fan expels the flow through the chamber during operation. Indirect heating assumes the presence of an independent circuit, as a result of which the combustion products practically do not come into contact with the heated air.
Equipment preventive maintenance:
- Remove the cover and clean the fan from dirt.
- Disconnect the high-voltage wires from the combustion chamber and remove the fuel hose. We blow out the last one.
- We loosen the fasteners on the camera and remove the block. We clean it from soot.
- We unscrew the nuts at the end of the chamber and get access to the nozzle. We blow it out.
- Putting it all in the reverse order.
Consumer reviews on electric heat guns
This section contains several reviews about the models of heat guns considered in this article, shown in the photo or close to them in terms of technical characteristics.
Feedback on the RESANTA TEP-3000N model:
Read more on otzovik:
One more review about the RESANTA TEP-3000N model:
Read more on otzovik:
Feedback on the "Ballu BHP-P-3" model:
More on IRecommend:
Feedback on the "Ballu BKX-3" model:
Read more on otzovik:
Another review of the Ballu BKX-3 model:
Read more on otzovik:
Feedback on the Ecoterm EHC-03 / 1B model:
Read more on otzovik:
Feedback on the model "Hintek Prof 06380":
Read more on otzovik:
Safety measures when using guns
To ensure fire safety measures, a container with a fuel supply for the product must be located at a distance of 8 meters from heating devices or any sources of open flame.
Remember! Instead of diesel fuel, you cannot use gasoline of any brand: the probability of an explosion increases many times over, because it is more volatile.
Safety measures when using guns are quite simple - you must immediately leave the room if you feel:
- sudden and severe dryness in the mouth;
- pain in the throat, nose, or eye area;
- sudden attacks of headache;
- desires of nausea.
Many people react very painfully to carbon monoxide indoors: for example, people with lung diseases or cardiac patients with anemia, pregnant women. They are contraindicated to be located where a diesel heat gun with direct heating is used.
Installation and connection of the heat gun
The way of connecting the heater depends on the type of its drive. There are also general operating rules that must be followed when connecting any heat gun.
General rules for the operation of a heat gun:
- Place the device on a flat surface only.
- It is advisable to leave a gap of at least one and a half meters from the ceiling to the gun.
- Do not lean the back of the heat gun against walls or other objects.
- Do not block the nozzle of the heat gun. This reduces its effectiveness, increases the risk of overheating and even fire. It is desirable that there is at least three meters of empty space in front of the outlet.
- Do not attach any sleeves to the gun nozzle.
- Do not put any objects on top of the heat gun.
- Do not move the heat gun if it is on.
- Do not point the heat gun at flammable objects.
- Do not use the heat gun in places where vapors of flammable or explosive substances are present: gasoline, acetone, alcohol, etc.
- Do not turn on the heat gun in dusty places.
- Do not use the heater in rooms with high humidity or outdoors when it is raining.
- Do not leave the heat gun running unattended.
- Do not modify the design of the heat gun.
- During repairs, use only the parts specified in the instructions.
- If you want to disassemble, refuel or repair the heater, you must turn it off and unplug it.
- If you use the heater indoors, remember to ventilate it at least occasionally.
- If the heat gun is dirty and dusty, it must be cleaned before turning it on.
- Before using the device at full power, allow it to warm up for an hour or two. This is especially important in winter when working outdoors or in cold rooms.
Repair work of old fan heaters
It is with this technique that one has to deal most often. But there is nothing to worry about, because the device of such heat guns is relatively simple, so with minimal knowledge of electrical engineering, you can cope with this work. In the simplest version, the heat gun is a metal case, inside of which there are several heating elements (heating elements), as well as a compressor for air injection. To adjust the temperature, a multi-position switch is used, less often "automatic machines" Let's talk in detail about how to repair a heat gun as a whole or any elements separately. As a rule, it makes no sense to give old products to the workshop. The cost of restoration work will be high, but their quality is highly questionable.
Recovery of gas heat-guns
Gas cannons fail the following structural elements:
- blower fan;
- piezoelectric element that ignites the fuel mixture;
- fuel supply device;
- protective and control units.
The Heat Gun Repair Shop will fix the following issues:
| Breaking | Repairs |
| Gas is non-flammable | The piezoelectric element is faulty - it is necessary to clean the igniter and set the required gap between the electrodes. If the problem persists, you need to replace it. |
| No gas enters the combustion chamber | Burner clogged. You will need to clean the part with a compressor, that is, blow it with a powerful stream of air. |
| You smell carbon monoxide | Leakage in the gas system. To eliminate the defect, you will need to tighten the fastening clamps or cut off the ends of the hose or replace it. |
| The device shuts down on its own | The electronic valve that regulates the fuel supply is broken. Element replacement will be required. |
| Stable operation of the unit with excessive gas consumption | Gearbox defective. A new part needs to be installed. |
| Burner works, but hot air does not come out | The reason is a fan breakdown. It is necessary to check the contact group and power supply. If no defects were found, the fan must be replaced. |
Repairing a gas-fired heat gun requires knowledge and skills that our masters possess. We will perform diagnostics to identify the cause of equipment failure. An easy way to identify a leak is to use a soapy solution. Bubbles will form where gas leaks.
Diesel options
Diesel heat gun malfunctions consist of the following important points:
- Fuel is supplied to the combustion chamber intermittently. The appearance of this defect is primarily associated with contamination of the fuel tank and its supply system. In this case, it is recommended to drain the fuel from the tank and rinse thoroughly. Then it is necessary to purge the entire fuel system.
- The fuel mixture is non-flammable. This failure is primarily associated with defects in the spark plug. To eliminate the malfunction, it is necessary to remove the plug, clean it mechanically, and also adjust the gap between the electrodes of this ignition element.
- The heat gun began to work intermittently. This type of malfunction is associated with a clogged air filter. In such a situation, you need to install a new filter.
- The heat exchanger does not heat up well due to a small flame in the combustion chamber. This defect is due to the fact that the nozzle is heavily soiled. In this case, cleaning occurs in a non-mechanical way. In other words, the nozzle is thoroughly flushed and then purged with a compressor.
- The heat gun overheats during operation. This malfunction occurred because the thermostat was out of order. To eliminate the defect, you need to clean all the elements of the thermostat or, if necessary, replace them with new ones.
In conclusion, we would like to wish you that your heat gun never breaks, and if such a nuisance did happen, then following our recommendations, you can easily identify all the defects and feel free to carry out repairs yourself.
Watch a video in which an experienced user clearly demonstrates the process of repairing a gas heat gun with his own hands:
DIY diesel heat gun repair
uazbuka.ru> Technical> General technical questions> Help with a heat gun (diesel)
View Full Version: Help with a heat gun (diesel)
29.11.2007, 12:22
In short, there is a heat gun, Cryp 20m She worked for 4 months every day for 8 hours
