Induction heating. Induction heating boilers: properties and price

Due to the constant increase in energy prices, the owners of country houses and city apartments are switching to alternative, more advantageous views heating, mainly choosing its autonomous options. Some prefer to install in order not to overpay for central heating, which in some regions is paid not only in winter, but also in summer. Other homeowners are interested in heating the house with the help of electrical appliances.

Electricity is more convenient in the sense that the installation of such a water heater does not require coordination with permitting organizations, drafting and approval of the project. But many are deterred by high tariffs. So, it is necessary to opt for electric boilers that differ increased efficiency and economical operation. These, of course, include units of the induction principle of operation. They rightfully created quite high competition for gas heating appliances.

But the induction boiler itself is a very expensive "pleasure". Therefore, many home craftsmen are interested in the question - is it possible to make an induction heating boiler with your own hands. It turns out that yes, this is a feasible task, but it requires a certain skill and knowledge, especially in the field of electrical engineering.

Let's talk about the following right away. The author of these terms is not a supporter of "home-made" in the field of electrical engineering, working with life-threatening voltages. Therefore, this publication should be considered as a review options, but not as a step-by-step guide to action. You should very soberly weigh your strengths, knowledge and capabilities before embarking on such a task.

What is an induction boiler?

Induction heating systems began to be used in industrial enterprises in the 80s of the last century. Household appliances appeared only in the mid-nineties. Over the past decades, they have been refined, and some updates have been made to their design, however, the principle of their operation remains unchanged.

The name of these heating systems and devices in itself indicates that their operation is based on electromagnetic induction. The essence of the principle of operation is that if an alternating current is passed through a wire of a sufficiently large diameter in cross section, wound in the form of a coil, then a powerful electromagnetic field is created around this primary winding. If a conductor is in this field, then a voltage will be induced (induced) in it. Well, if lines of force fields intersect the core of an alloy with magnetic properties located in it, then a kind of short-circuited circuit is obtained. And due to the appearance of stray Foucault currents on it, there is a very fast and strong heating of this material.

This principle is widely used, for example, in the steel industry. They also found application for fast and high-temperature heating of water. It is clear that in this case a pipe or other channel through which the coolant circulates will act as the core.

And the most understandable example of an induction heater is a wire wound around a pipe made of dielectric, which will insulate the magnetic core placed in it. inner space.

The wire coil is connected to the power supply and creates an electromagnetic field. As a result of the impact of the variable electromagnetic field the metal core-rod will heat up, transferring heat to the coolant, which then enters the pipes and radiators of the heating circuit. Oil, water or ethylene glycol can be used as a heat carrier in autonomous heating systems.

This is, of course, a very simplified explanation. In induction boilers of industrial production, a whole labyrinth of pipes or channels can be a heat exchange ferromagnetic core, and often, for example, in vortex heaters, the body of the device is also involved in this process.

In heating systems of short length, the coolant, heating up, will to go up, and the resulting natural pressure is usually sufficient for its natural circulation. If the heating line quite long and branched, tied to collectors with further distribution of coolant flows along separate circuits, then one or more circulating ones are installed in the system, since without them it will be impossible to achieve the required movement of the coolant.

Is the induction heating method really effective and reliable?

Before you buy or start manufacturing an induction boiler, you should understand how effective this heating method is. In specialized shopping malls from sales consultants you can only hear positive characteristics systems based on this principle. However, not everything they say is 100% true. And these heating units have their own, so called, "underwater rocks".

Sellers operate with a whole list of theses, trying to increase sales of boilers operating on the induction principle:

• For example, it is widely claimed that the principle of operation of these devices is an innovative development.

In reality, this is not true, since electromagnetic induction was discovered back in 1831. English experimental physicist Michael Faraday. In the second half of the 20th century, induction systems were successfully used in the metallurgical industry.

From this we can conclude that these devices can hardly be attributed to innovative technologies. However, this has its own “plus”, since such a system has already been tested by time and has proven its effectiveness.

• The next important quality that sellers focus on is the cost-effectiveness of using an induction boiler. It is usually stated that this type of units consume energy 25÷30% less than others. electric heaters. Is it possible to agree with this?

Probably not yet. Any one consumes electricity according to its power, indicated by the manufacturer in the technical data sheet. That is, to generate one kilowatt of heat, in the most ideal case (at 100 percent efficiency), the device needs to consume a kilowatt of electricity. And, even with the named parameters, the efficiency of the unit may be less, since much also depends on the specific operating conditions of the boiler.

The time of heating the coolant to the desired temperature depends on the power and efficiency of the heating element. It must be said that part of the energy expended, one way or another, is wasted, since the materials from which the parts of the device are made do not have zero resistance. However, heat losses from the operation of an induction boiler do not go “into the chimney”, but remain in the room where the device is installed, which is often their obvious advantage.

So, the conclusion suggests itself that it is unlikely that it will be possible to save on electricity in any serious way when using an induction boiler. But their efficiency and heating rate are really high.

• Despite the approximate service life specified in the data sheet, set by the manufacturer (not to be confused with the warranty!), the sellers assure that the induction heating boiler will last at least 25 years. It must be agreed that this information is reliable if the electronic control unit is of high quality. The unit includes semiconductor elements in its package, which can still fail. As a rule, manufacturers give a ten-year warranty on the components of the electronic unit. However, quite often they work perfectly for 25-30 or even more years.

On and in the boiler itself, by and large, there is simply nothing to break. So, the primary winding, usually made of copper, has a large margin of safety and will last long term, if it is properly cooled (and this is ensured by the circulation of the coolant).

The core rod or the material of the internal channels, of course, will begin to break down over time, since it will be constantly adversely affected by the aggressive medium of the coolant, as well as the alternation of cooling-heating. However, in order for it to become completely unusable, more than a dozen years must pass.

Considering the design of the boiler operating according to induction circuit, we can conclude that it is much more reliable and durable than heating devices, in which as heating elements are used heating elements.

• Another quality that is put as a plus with an induction heating device is silent operation - supposedly it distinguishes it from other heating units. The question is, is this true?

But here, just exactly the opposite. Yes, electric heating units operate silently, since during their operation no acoustic vibrations are created and no mechanical components are used. However, it is during the operation of the induction device that low-frequency vibrations can be clearly felt, which can irritate people with heightened hearing. This negative phenomenon is minimized in vortex type boilers, in which the supply voltage to the primary coil is pre-converted to high frequency.

In addition, if a low-quality circulation pump is installed in the system, then it can also become a source of slight annoying noise. But this already applies to all heating systems, regardless of the type of boiler. But the modern range of pumps makes it possible to purchase a completely silent model.

• The buyer can evaluate the compactness of the boiler visually. We can say that this unit consists of a pipe section of a certain length, which does not take up much space, unlike other heaters. True, the mass of an induction boiler is usually very impressive, that is, reliable brackets are required.

However, do not forget that you will need space for related elements of the system, as well as wiring circuits and installing collectors, if required by the scheme. If necessary, heat enough large area At home, it is not uncommon to install several induction appliances, and the entire system will require a lot of space.

• The statement that boilers of this type are completely safe, and, this quality of boilers is more pronounced than that of their heating element counterparts, is incorrect. The safety of operation for these two types of heaters is approximately the same, and depends on correct connection and from the operability of the systems of protection against extreme situations embedded in them.

For example, if a coolant leaks in an induction device, and the electromagnetic field does not turn off in time, and the heating of the inner core continues, then the case and fasteners can melt in just a matter of minutes. Therefore, when purchasing a device or designing it yourself, you need to pay attention to the automatic shutdown of the unit in case of an emergency.

As you can see from the information presented above, induction boilers, like other heating units, have their drawbacks, and they are not unique devices that allow you to pay mere pennies for heating. However, their effectiveness is not in doubt. And yet - due to the compact size of the boiler, it is quite possible to place it in an apartment, for example, in a niche, so that it will be almost invisible.

How to make an induction boiler yourself?

There are many designs of induction boilers. Some of them are difficult for independent execution, others are simpler. Next will be discussed with respect to available options which can be made at home. However, to bring these projects to life, certain materials and tools will be required.

The first option is with using an induction hob panels

This version of the heater can be called experimental. It is suitable for heating a small room of 20÷25 m². In the heating circuit heated from such a device, it is best to install either radiators that warm up quickly and give off heat to the room. In addition, the volume of such radiators is small, so a small amount of coolant is required, which will quickly heat up in an induction mini-boiler.

The source of the alternating electromagnetic field in this project is an induction hob, which may have been replaced by more modern model, and while idle lying around in the pantry.

For the manufacture of this model of a heater operating on the induction principle, the following materials will be required:

• Steel profile pipe 50 × 25 mm, ten pieces 500 mm long and two 300 mm long - for the manufacture of the boiler heat exchanger.
• Steel profile pipe 50 × 30 mm, two pieces 500 mm long and one 700 mm long - for the manufacture of the bracket.
• Steel pipe with a diameter of 20 ÷ 25 mm - two pieces 120 ÷ 150 mm long.
• Steel sheet with a thickness of 3÷4 mm for the manufacture of an expansion tank with a size of 270 × 270 × 100 mm.
• . Their number will depend on the specific scheme that is being made for a specific location of the boiler and its piping. To connect pipes, you will need related elements - couplings, corners, threaded fittings etc . - here you can show your own vision of piping and piping.
• Ball Valves, which will block the movement of the coolant if it is necessary to carry out preventive or repair work on heating equipment.

In addition to these materials, it is necessary to prepare some other devices and accessories necessary for installation and for installation in the boiler piping.

• Circulation pump.
• induction electric double burner plate - in another way it is often called a panel.

To perform the work, you will need some tools and devices, as well as, of course, the ability to work with them:

• The device for the soldering of polypropylene pipes.
• gas key.
• Electric drill.
• "Bulgarian" (grinder).

Work on the manufacture of such a heating induction boiler is carried out in the following order:

Illustration
	The first step, with the help of a grinder, is a profile steel pipe cut into segments of the desired length. A heat exchanger housing will be made of them, through which the coolant will circulate. The segments are folded side by side on the end side, a kind of battery is obtained. They must be fixed in a position pressed against each other. Further, the pipes are welded together by spot welding. First, they are tacked along the edges, and then along the entire line of joints, every 100 mm. For the fastest cooling and strengthening of welded points, as well as for cleaning from welded fumes, the resulting structure can be shed with a stream of cold water.
	The next step is to trim the edges of the resulting "battery" - for this they are cut with a grinder. Smooth edges are necessary as they will be covered by a metal U-shaped profile (channel), which must be perfectly aligned with the edges of the square pipes welded together.
	U-profile can be purchased from ready-made or make it yourself by cutting one wide strip from a profile pipe. You need to prepare two such details. Moreover, the cut strips will be further used to close the end edges of the U-shaped parts, as well as for the construction of the brackets.
	Now, the resulting channel profile must be very carefully welded with a continuous seam to the edges of the end sides of the "battery". The space that will be formed by this part will allow the coolant to circulate through the pipes - two kind of collectors are obtained. It should be noted here that it is quite possible to make a heat exchanger-battery in the form of a coil - this will simplify the circulation of the coolant, it will warm up faster, which will increase heat transfer.
	Further, from one of the strips that remained after the manufacture of the U-shaped profiles, four plug inserts are cut off, corresponding in size to the holes formed by the U-shaped profiles welded to the ends of the battery. Then, they are welded to the place intended for them with a continuous seam, since the structure must be sealed.
	Now, on the end sides of the battery, you need to drill two holes into which pipe sections are welded, having a thread on the outside. One branch pipe must be located at the bottom of one side of the battery - it is intended for the entry of cooled water into the heating boiler (the so-called "return"). The second branch pipe is welded into the hole located in the upper part opposite side designs. Through it, the heated water will flow into the heating circuit (supply). In addition to them, in the center of the sides, also by welding, segments of a profile pipe 100 mm long are fixed.
	Welding points and seams on the finished heat exchanger are cleaned with a grinder and give the structure a neat appearance and smoothness. The rear side of the heat exchanger must be treated especially carefully, since the heating surface of the induction cooker must be pressed against it.
	Further, finished assembly must be primed and then coated with a heat-resistant paint intended for metal elements of the heating system.
	The next step is to make an expansion tank from metal panels. Its parts are welded together with a continuous seam, since it must be airtight. A branch pipe with an external thread cuts into the lower side of this part of the system for connection to the heating circuit. I must say that the expansion tank can be bought ready-made. Its capacity is selected depending on how much coolant will be in the heating circuit - you can start from a value of 10% of the volume.
	Next, you need to prepare a bracket frame for installing the induction panel and fixing the heat exchanger. In this illustration, you can see that the bracket consists of two vertically profile pipes and bottom shelf. The latter can also be made from a profile pipe, from which one narrow and one wide side is cut off. In the middle part of the vertical profiles, sections of the profile pipe are welded. Their location must be calculated so that they can dock with pipe sections fixed at the ends of the heat exchanger. Then all the parts are fastened together by welding, and the lower horizontal part of the structure should form a shelf on which the induction panel will be installed. After that, the heat exchanger is fixed on the bracket with the help of pipe sections welded on its ends. However, there must be a gap between the bracket and the heat exchanger, in which it will be possible to install the induction hob, so that it is firmly pressed against the heat exchanger with its heating elements.
	An induction hob designed for cooking works on the same principle as a boiler, since there are coils inside it that induce a powerful alternating electromagnetic field. This field will become the "initiator" of heating the steel profile pipes of the heat exchange battery. The convenience of its use lies in the fact that all electronic and electrical modules are located inside the structure, and outer coating panel makes the appliance safe. Installing the panel in the bracket behind the heat exchanger, it is pressed against its surface.
	Now it remains only to bring pipes to the boiler that will connect it to the heating circuit. For this, polypropylene or metal-plastic pipes can be used, the main thing is that they are intended for hot water having a temperature of at least 95 degrees. As mentioned above, the outlet of the heated coolant from the installation is connected with a pipe delivering it to the radiators, as well as with an expansion tank, which is fixed on the wall under the ceiling.
	The whole system will not work effectively without a circulation water pump, which can be installed in any convenient place of the heating circuit, but ideally - on the "return" pipe before entering the boiler - where it will be less exposed to high temperature effects. It is desirable that it be located near the power outlet.
	It remains to fill the system with water (coolant), check the tightness of all connecting nodes. If everything is normal, you can start the boiler. The illustration shows a test run using a carrier. In actual operating conditions, it is certainly necessary to bring a separate power line to the boiler with an appropriate wire cross-section and a ground loop.

Using the induction panel, you can make another version of the boiler, which will be more efficient than the one described above, although less compact.

The peculiarity of this option is horizontal position of the induction hob with heat exchange blocks installed directly on the heating pads located in it. Here the construction essentially works the same as regular tile on which a pot of water is placed and heated to high temperatures. The difference lies in the fact that the container ("pan") is made of ferromagnetic alloy, that is, all its walls are actively heated. These containers are made airtight, interconnected, and the heated water does not evaporate, but goes into the heating circuit connected to such a boiler.

The second option is with a homemade induction coil and a welding inverter

The second version of the inductor heater of the boiler is made on the basis of a high-frequency welding inverter. It is desirable that the device is equipped with a smooth adjustment of the welding current. The power of the inverter must be directly proportional to the power that the heating boiler must have. by the most suitable option for a home-made design, the inverter indicator is 15 amperes, but if necessary, you can make it more powerful.

It should be correctly understood that the connection of the water heater is in no case made to the terminals of the welding wires - nothing but short circuit in this case it won't work. The inverter will have to be somewhat modified - the primary winding of the heater being created must be connected after the high-frequency converter, instead of the induction coil of the inverter itself. If it is difficult to deal with this yourself, then consult with a specialist in this field.

This heating principle is used for heating the coolant, which passes through the same pipe placed in an electromagnetic field. The option shown below can be called very controversial, but the master who has tested it in practice convinces of its efficiency and effectiveness.

As you will see, the manufacturing costs are minimal, so if you wish, it is quite possible to conduct an experiment. Even if there is not enough power for full-fledged heating, it may be an acceptable solution for heating water for domestic purposes.

Illustration	Brief description of the operation to be performed
	So, in addition to the inverter welding machine, a number of parts will be required to create a heater. As a housing, which will be part of the heating circuit, as well as the basis for the formation of an induction coil and a heat exchanger, a segment is used polypropylene pipe with thick walls (PN25) 400÷500 mm long, designed for transporting hot water. It is desirable that inner diameter pipes to be at least 50 mm, that is, a pipe with outside diameter 75 mm. You can take a smaller one, say, with an external 50 mm, internal - 33, but the performance of the heater, of course, will decrease. You will need steel wire or a metal rod with a diameter of 6 ÷ 7 mm - segments 40 ÷ 50 mm long are cut from it. These elements will take on the role of a ferrimagnetic core-heat exchanger. Other options for heat exchangers are also possible - this will be discussed below.
	Instead of cut pieces of rod inserted into the pipe cavity, one thick metal rod or a steel pipe of smaller diameter, a steel screw, or other products that have magnetic properties and are convenient for being placed in a PVC pipe can be used. So, they practice filling the pipe with steel balls, large chips, unnecessary nuts, etc. If small metal elements are used to fill the pipe, from which the coolant will heat up, then one edge of the pipe must be closed with a metal mesh. Then pour the steel elements of the filler into it, and then close its second edge with a mesh.
	You can use a metal screw with frequent turns or several metal pipes ok with a diameter of 4÷5 mm, which will be tightly installed in a polypropylene casing-pipe. They will provide a large area of ​​direct heat exchange with the circulating water. Some craftsmen use steel wire or even ordinary stainless steel kitchen washcloths to fill the "boiler", tightly clogging the polypropylene pipe with them.
	When purchasing kitchen washcloths for such purposes, it will be necessary to check whether they have magnetic qualities. To do this, when going to the store for a purchase, you can take an ordinary magnet with you and attach it to the product for cleaning dishes. If such a washcloth is magnetic, then it is suitable for filling the cavity of an induction heat exchanger. Since the chips are thin, it will heat up very quickly, giving off thermal energy to the coolant that will pass through it. The option of tightly filling the pipe with metal shavings can, perhaps, be called the simplest, most affordable and effective option.
	When the body of the induction heat exchanger is full metal products, adapter sleeves are welded along its edges, bringing its large diameter to the diameter of the pipes of the heating circuit. Then, if it is necessary to install the device in a specific place, corners-branches are welded to the couplings through the pipe section, directing the flow of the coolant in the desired direction. It would be nice to weld couplings with American nuts - so the heating device will become removable, for example, to perform any repair or maintenance work. A specific wiring diagram for these bends or, if necessary, straight pipe sections, is drawn up in advance, based on the specific installation conditions of the heater and circuit wiring.
	Next, textolite sticks or rods should be glued onto the pipe, which will serve as the basis for winding the induction coil. Textolite is chosen because it has excellent dielectric qualities and is not afraid of elevated temperatures.
	Along the edges of the heat exchanger housing, from the same textolite, it is necessary to make expansion joints for the ends of the wire, 12 ÷ 15 mm high. They will be required for the location of the terminal contacts through which the boiler will be connected to the inverter apparatus.
	The coil is wound from insulated wire with a cross section of 1.5 mm, which is used for winding in transformers. The coils are placed on top of the textolite rods with a step of 3 mm. The ends of the cable are fixed on textolite racks-clamps. The winding should consist of a whole segment of a well-insulated cable, since it will pass through it electricity, which creates an electromagnetic field necessary for heating the core-heat exchanger.
	To create a winding, 10 ÷ 10.5 m of insulated cable is required, from which 90 turns should be obtained. Its length and cross-sectional size were determined after calculating the parameters of the coil located on the "native" inductor of the welding machine. To connect the coil to the welding machine, terminals are fixed to the ends of the wound wire. The connection must be well insulated.

All this construction, for safety reasons, can be placed in a casing, which will serve as external insulation for the device. It must be made of a dielectric material, which can be a large diameter pipe made of PPR, PVC or PE. In the protective casing, holes are provided for the outlet of the ends of the power cable, the outlet of the nozzles for tapping into the heating or hot water circuit. For example, the ends can be sealed with plugs by placing them on heat-resistant glue and making holes for the pipes in them or the side parts of the casing. Here, in principle, a wide field for the imagination of the master.

Testing of this device can be carried out only after installing it in the heating system and filling it with coolant. Otherwise, when heated, the polypropylene pipe of the body may quickly melt.

This illustration shows an approximate diagram of an autonomous heating circuit with an induction boiler installed in it. The system consists of the following elements and units:

1 - Connection to the electrical network through an energy converter. In the design discussed above, a high-frequency converter of the welding inverter is used as it.

2 - The induction water heater itself.

3 - Elements of the "safety group", which may include a pressure gauge, thermometer, safety valve and automatic air vent.

4 - Ball valves that shut off the water supply in a certain section of the circuit, as well as for replenishing or draining water from the heating circuit.

5 - Circulation pump required to create the required flow of coolant.

6 - mechanical (mesh) for cleaning the coolant. Filtration of the coolant can significantly increase the service life of boiler equipment.

7 - Membrane expansion tank, necessary to compensate for the thermal expansion of water or other coolant.

8 - Heating radiator. In a system powered by an induction boiler, a bimetallic or aluminum radiator. They are characterized by small volumes and very high heat dissipation.

9 - Line for feeding the system with water or emptying it for maintenance or repair work.

In conclusion, the publication must be emphasized once again: if there is no experience in working with electrical products, the knowledge of the beginnings of physics has been forgotten, there is no confidence in one's skills in plumbing and plumbing work, then such a thing is not worth taking on. It is best to purchase an induction boiler ready-made or, in case of emergency, order the device from experienced craftsman, which will not only manufacture it, but will check its performance and safety in operation.

Video: The master shares the secrets of making an induction boiler on his own

In spite of great amount ways to generate heat natural resources, homeowners are increasingly turning to the use of electric heating installations to heat their homes.

Electricity boilers are environmentally friendly, since no combustion products are emitted into the atmosphere, which appear during the combustion of oil products, gas, coal and even firewood.

Vortex heater

Another plus use of electric heating is the ease of maintenance of heating systems mounted on the basis of electric boilers. However, the convenience of using electricity for home heating is becoming an increasingly costly way to get heat in the house - paying the bill for electricity consumption with each heating season becomes overwhelming for many.

Homeowners are beginning to look for an alternative to electric boilers, the basis of which is a standard heating element.

Induction electric boilers are gradually gaining popularity, also converting electricity into heat needed for space heating. However their design makes it possible to use the energy carrier much more economically, which significantly reduces the current costs of maintaining the house during the heating season.

Energy savings are due to the rapid heating of the heat carrier of the heating system. This happens thanks to induction device, which replaced the traditional heating element in the boiler.

In addition to reducing heating costs, these boilers have a solid number of advantages over other electric boilers - high efficiency, long service life (at least 25 years) and no scale.

The internal structure of the induction heater and the principle of its operation

The design of such a device designed to produce heat energy is similar in its simplest form to a transformer. Like the transformer the induction generator consists of short-circuited windings - primary and secondary.

Primary winding serves to convert electricity into eddy currents that create an electromagnetic field directed to the secondary winding. Secondary winding at the same time it is both the body of the inductor and the heating element that transfers the received energy to the heating system. The coolant can be any electrically conductive liquid, ranging from ordinary technical water to oil and antifreeze.

Since a vortex induction heater (or simply wine) does not emit fuel decomposition products during operation, it is the safest among various types of heating equipment used to provide heat to buildings for various purposes. Such a heating system guarantees a favorable composition of the atmosphere, which means maintaining its environmental cleanliness.

Heating system starts working immediately after applying voltage to the internal winding. The resulting electromagnetic field directs eddy currents to the surface of the core located outside.

Their density almost instantly increases, heating the surface of the core, and then the entire element. This heat serves to heat the coolant circulating in the boiler.

Why is it needed for a heating system? Types of device, and the principle of its operation.

Is it worth installing a thermostat on a heating radiator? product?

It should be borne in mind that the device crashes into the heating system using two nozzles. The lower one serves to supply the cooled coolant. It is mounted at the entrance to the boiler, and through the second pipe the heated coolant is sent to the heating system.

The supply of heated coolant is carried out due to hydrostatic pressure. Since the coolant constantly circulates in the system, carrying out the removal of hot liquid into the heating system, then the possibility of overheating of the equipment is completely excluded.

Features of the installation of the boiler plant and its operation

To ensure continuous circulation of the coolant, the heating system equipped with an induction electric boiler must be closed, in without fail equipped circulation pump. There are some rules for installing an induction boiler indoors.

The boiler must be mounted at a distance of at least 30 cm from the wall surfaces. From the floor and from the ceiling, the distance should be more than 80 cm. To be able to monitor the operation of the system and ensure its safety, a pressure gauge, a blast valve, automatic device designed to vent air.

Before starting work, be sure to check the presence of coolant in the system. The supply of electricity in its absence guarantees the failure of the equipment. You can install such a boiler in any room of the building, taking into account its installation at the above distance from its walls, ceiling and floor.

Many consumers who used plastic pipes when installing the system are concerned about the question: Can an innovative boiler be connected to them? This problem does not exist, plastic pipes for heating systems are designed to use any heating equipment.

Read how to choose the right expansion tank for a closed heating system.

Advantages and disadvantages . How to choose and install?

How to choose a heat pump for heating a private house? Advantages and disadvantages of heating systems of the future.

Induction boiler price and installation cost

The choice of the power of the induction boiler, as well as any heating equipment. determined by the size of the heated area of ​​the building. The cost of the equipment also depends on the power. The most inexpensive VIN boiler available for sale costs about 30 thousand rubles. The cost of installation starts from 6 thousand rubles.

The power of such a heater is 6 kW, which is quite enough to heat a small country house. It has two heating sections, 3 kW each, which is very convenient when increasing outdoor temperature air. This design of heating equipment can significantly reduce the consumption of electricity for heating the house.

Review:

For a long time I chose the VIN boiler and bought a SAV. At 5 kW. Since the task was to heat country house. The device does its job well. The only negative is that the machine often knocks out and refuses to work through the RCD. I will build a more powerful power supply line. Perhaps this will solve the problem.

Do-it-yourself induction electric boiler

The simplicity of the design allows home craftsmen to make an induction wine heating boiler on their own. In the manufacture of the simplest version of such a heater you will need to purchase a high frequency welding inverter .

It is desirable that it be equipped with a device for smoothly adjusting the current. The power of the structure depends on the magnitude of the welding current (at least 15 amperes).

You should also prepare the following materials:

• thick-walled plastic pipe, the inner diameter of which is slightly less than 5 cm;
• stainless steel wire 7 mm;
• adapters for connection to the heating system;
• enamelled copper wire;
• fine metal mesh.

The wire is cut into pieces about 5 cm. Then a plastic pipe is taken, at the bottom of which a metal mesh is fixed, and then an adapter is attached to the base. This pipe will simultaneously perform two functions - it will become a section of the heating system pipeline and the basis of an induction coil.

The inside of the pipe is completely filled with wire scraps.. They will serve as a material heated by an electromagnetic field, and a fixed metal mesh will prevent them from falling into the pipeline. Then on upper part plastic pipe an adapter is also installed.

The next stage of work will be the manufacture of the coil. Around the base of a plastic pipe filled with wire scraps, 90 turns of prepared copper wire are carefully wound. The wire should be located in the middle of the pipe.

The finished device is installed using adapters in the gap of the pipeline of the heating system. Installation is strictly vertical.

After installation, the coil should be connected to a high-frequency inverter, and the heating system should be filled with coolant. The heating device must be connected to earth. Now you can start using the heating device made by yourself.

To prevent heat loss and a more aesthetic appearance, a heat-insulating casing should be made.

Also watch a video on how to make induction heating with your own hands:

A study of consumer demand in the boiler equipment market shows that most of the buyers who use electricity for heating their homes prefer modern factory-made induction boilers equipped with various systems safety, powerful and economical. Such heating equipment of a new generation is becoming more popular every year.

When choosing a boiler for heating a house, the owners are guided, first of all, by what heating source is available for the room. Gas is the cheapest fuel, but far from being supplied at all settlements. Electricity is the most common, but not the cheapest. An induction heating boiler produces a fairly high efficiency, with less electricity consumption, compared to other electric options.

The basis of the principle of operation of the boiler is the creation of heat from electrical energy. The action of electromagnetic induction is as follows - we pass a current through a coil wound with wire, an electromagnetic field arises around this winding. The metal core placed in the coil (having the property of being attracted by a magnet) will begin to heat up quickly.

Heat Generator Mechanism: It is an electrical inductor, consisting of a primary, a secondary winding and a core. Processing electricity into eddy currents, the primary winding directs the electric field to the secondary winding, which in turn transfers energy to the carrier. Under the influence of an electromagnetic field, eddy currents are formed in the body and core. They heat up the metal. Water takes heat from the core and distributes it throughout the building.

The operation of the induction cooker is based on the same principle. Such tiles are much more economical than conventional electric stoves. This is achieved by avoiding heat loss when transferring heat from the heater to the cookware. Marketers today designate induction heating boilers as advanced developments created on a new principle. But in reality, this is not entirely true. Inductive principles have been applied since the last century for melting furnaces. Also, no new materials are used for the manufacture of boilers.

M. Faraday discovered the phenomenon of induction in 1831.

Induction options are safer, compared to other heating boilers, they practically do not need maintenance. They do not contain dynamic parts, and as a result, they do not have mechanical wear. With sufficient cooling, the life of the coil is not limited. Separate room such boilers are not required. Compared with, they practically do not need preventive work.

Advantages of an induction boiler:

• Constant circulation of the coolant;
• No heating elements;
• Noiselessness.

An inductive electric boiler is able to heat not only the area of ​​​​a small private house, but also industrial premises without the need for large installation and maintenance costs. The induction heating boilers on the market are not cheap. The reason is in the sensors of the system. The inverter used in the control system increases the cost of the heating boiler.

How to make an induction heating boiler with your own hands

Opponents of the installation of induction boilers cite the law of conservation - 1 kW of electricity is able to generate thermal energy also no more than 1 kW. Yes, any water heater, consuming 1 kW of electricity, also produces 1 kW of energy. But not all of it is thermal. Induction water heaters are more productive in the production of thermal energy, in comparison with heating elements. Making a homemade inductive water heater is not difficult. The materials used in this case can be found without much difficulty and at a low price. The circuit of such an inductive device is quite simple.

To convert electricity into heat, you need:

• Inductor;
• AC 50 Hz;
• The core of the material to which the magnet "sticks";
• Boiler drawings induction heating(not a problem to find).

For the body of the induction boiler, you need to take a pipe with a diameter of 5 cm. The pipe is filled with pieces of wire, 5-7 cm, with a diameter of not more than 7 mm. To connect the boiler to the pipe system, you will need adapters. The scheme of the heating system will help determine the characteristics.

It is better to install an automatic shutdown of electricity in the event of a coolant leakage. In this case, the electromagnetic field will not disappear if the power supply is not turned off, and the case with fasteners will simply melt.

We make an induction coil - the main heating element. To do this, we take a copper wire, wrap it around the body, approximately 85-99 turns. We keep the interval between turns equal. The simplest induction boiler is ready. Such an inductor can be installed anywhere in the pipeline. The induction steam generator works on the same principle.

Learn about the advantages and disadvantages of a double-circuit boiler in the following material:

Modernization of induction heating

Induction heating systems often have favorable reviews. Silence, efficiency and longevity are the indisputable pluses of the heating system. One of the varieties of the system is the operation of an induction water heater for heating. An induction water heater can be bought and installed in a piping system.

You can choose a scheme for induction heating with your own hands. In this case, you can save your money well.

But, for more efficient operation of the induction system, it is important to know some of the nuances. Installing induction cooker into the design, it is connected to charger, batteries and inverter. An inverter is a device that converts direct current into alternating current. Its use reduces the amount of electricity consumed for the heating system to virtually zero.

For less energy consumption, you need:

• 4 kW inverter;
• 2 batteries 250 Ah;
• Battery charger.

We connect 2 batteries synchronously, and charge to them. They generate direct current and feed it to the inverter. The inverter converts direct current into alternating current. Then the inverter transfers the current to the induction cooker, and the charger continuously charges the batteries. Thus, the consumption of the charger at 24 V is the energy consumption of induction heating at home. The cost of the pump is calculated separately. Induction heaters are used only in versions with forced circulation.

Description of inverter heating boiler

The inverter boiler has become available to the household consumer, in contrast to industrial enterprises, relatively recently. At the heart of the boiler device are 2 main cylinders placed in the outer one. The option of such a boiler is safer. At correct installation, fire safety is orders of magnitude higher compared to gas, coal and wood boilers.

The principle of operation of the inverter boiler:

• The coolant flows in the inner cylinder;
• A cylinder that passes current through itself provides heating of the coolant;
• The outer cylinder acts as a heat insulator;
• The boiler is based on electromagnetic induction.

The mechanism of the inverter boiler virtually eliminates coolant leakage. An important quality is that any option (water, antifreeze, oil) can be used as a coolant. The advantage of using antifreeze is that when the boiler is turned off in winter, the battery will not freeze or burst. Low power inverter boiler models often have the ability to run on battery power, which significantly reduces energy costs.

When installing an inverter boiler in a heating system, it is important to properly connect the ground.

The inverter system allows you to quickly dial desired temperature, and will provide economical consumption electricity. Such systems are successfully used in the production of split systems. The inverter air conditioner has a much longer service life than standard split systems.

Do-it-yourself induction heating boiler (video)

Induction devices are practical and economical systems that do not require difficult installation and maintenance. As a rule, small dimensions allow installation in any premises, and do not require restructuring of the heating system. The fire safety of induction heating boilers allows them to be used in country houses, even if the owners do not appear there often.

Induction heating boilers appeared on sale recently and immediately competed with the usual electric boilers with heating elements. With similar size and power consumption, induction heaters are able to warm up the system much faster, in addition, they can work in systems with poor quality of the coolant and require less maintenance. Applying knowledge in electrical engineering and ingenuity, you can make an induction heating boiler with your own hands.

The basis of the action of induction boilers and other heating devices of this type is the ability of conductive materials to heat up under the action of eddy currents created as a result of electromagnetic induction.

The source of induction is a high-frequency alternating current passing through the primary winding of the heating device, made in the form of a coil. The heating element placed inside the coil plays the role of a secondary short-circuited winding. It converts electromagnetic energy into thermal energy.

Eddy currents also occur at an industrial frequency of 50 Hz, but the efficiency of the heater will be low, and the operation of the device will be accompanied by a strong hum and vibration. When the frequency is increased to 10 kHz and above, the noise disappears, the vibration becomes imperceptible, and the heating increases.

Device

An industrial induction boiler consists of a core, the role of which is played by a heat exchanger, around which a toroidal winding is wound, connected to a high-frequency converter. When current passes through the winding, an alternating electromagnetic field is created, which results in eddy currents passing through the core.

The winding is connected to a high-frequency converter, in which a signal from the control unit creates a current of the required frequency. Modern boilers have high level automation, which allows not only to create the optimal mode of heating the coolant, but also to turn off the device in case of an emergency.

Inside the core-heat exchanger is a coolant. Under the influence of eddy currents, it heats up to high temperatures. Due to the difference between the temperature of the coolant at the inlet and outlet, the circulation of the coolant through the system from the boiler occurs continuously, even without connecting the pump. Therefore, induction boilers can be used in systems with forced and natural circulation.

The coolant can be either water or antifreeze, antifreeze, oil. In this case, the quality of the liquid does not matter: the constant vibration of the system, which is imperceptible by a person, makes it impossible for scale and other impurities to settle on the walls of the heating circuit.

Outer shell - metal body, equipped with a system of thermal and electrical insulation.

Boiler shape it can be any, as well as the method of its installation: due to the absence of a tank inside the boiler, its dimensions are usually small, and its weight does not exceed 50 kg.