How to make an induction heater and oven from the welding inverter. The whole truth about the induction heating: Is it worth the game of the candle induction magnet with their own hands

The principle of operation of the induction heater is based on two physical effects: the first is that when the conductive circuit is moved, an induced current occurs in a magnetic field in the conductor, and the second is based on the heat release of metal, through which the current is passed. First induction heatingatel was implemented in 1900 when a way of contactless heating of the conductor was found - for this used currents high frequencywhich were induced using an alternating magnetic field.

Induction heating found an application in different areas Human activity thanks:

rapid warming up;
opportunities for working in various physical properties media (gas, liquid, vacuum);
lack of contamination by combustion products;
electoral heating capabilities;
the forms and size of the inductor - they can be any;
the ability to automate the process;
high percentage of efficiency - up to 99%;
ecology - no harmful emissions in atmosphere;
long service life.

Scope of application: Premises heating

In everyday life, the induction heater scheme was implemented for and plates. The first were especially great popularity and recognition from users due to the lack of heating elements, which reduce the performance in boilers with another principle of action, and discerning compounds, which gives savings on the maintenance of induction heating systems.

Note:The scheme of the device is so simple that can be created at home, and with your own hands you can create a homemade heater.

In practice, several options are used, where used of different types Inductors:

heaters S. electronically control To create currents the desired view in the coil;
vortex induction heaters.

Operating principle

The last option that is most commonly used in heating boilers has become in demand due to the simplicity of its implementation. The principle of operation of the induction heating is based on the transmission of the magnetic field energy to the coolant (water). The magnetic field is formed in the inductor. Alternating current passing through the coil, creates a vortex stream that transform energy into heat.

The water supplied through the lower nozzle into the boiler warms up due to energy transmission, and goes through the upper nozzle, falling further into the heating system. A built-in pump is used to create pressure. Water circulating in the boiler does not allow the elements to overheat. In addition, during operation, the vibration of the coolant occurs (with a low noise) due to which it is impossible to deposition on interior walls boiler.

Induction heaters can be implemented in various ways.

Realization in household conditions

Induction heating has not yet gained a sufficient market due to the high cost of the heating system itself. So, for example, for industrial enterprises Such a system will cost 100,000 rubles for household use - from 25,000 rubles. and higher. Therefore, interest in schemes that allow you to create homemade induction heater do it yourself

Based on transformer

The main element of the induction heating system with the transformer will be the device itself, which has a primary and secondary winding. The vortex streams will be formed in the primary winding and create an electromagnetic induction field. This field will affect the secondary, which is, in fact, the induction heater, implemented physically in the form of a heating boiler housing. It is the secondary short-circuited winding that transmits the energy to the coolant.

The main elements of the induction heating installation are:

core;
winding;
two types of insulation - heat and electrical insulation.

Core - these are two ferrimagnetic tubes different diameter With a wall thickness of at least 10 mm, welded into each other. The toroidal winding of the copper wire is made along the outer tube. It is necessary to impose from 85 to 100 turns with an equal distance between the turns. AC change, changing in time, creates a vortex stream in a closed loop, which heated the core, therefore, the coolant, carrying out induction heating.

Using high-frequency welding inverter

Induction heater can be created using welding inverterwhere the main components of the scheme are the generator alternating current, Inductor and heating element.

The generator is used to convert the standard frequency in the power supply network 50 Hz in a current with a higher frequency. This modulated current is supplied to a cylindrical inductor coil, where copper wire is used as a winding.

The coil creates a variable magnetic field, the vector of which varies with a specified frequency generator. Created vortex currents induced by a magnetic field produce heating a metal element that transmits energy to the coolant. Thus, another induction heating scheme made with their own hands is being implemented.

The heating element can also be created with its own hand from the sliced \u200b\u200bmetal wire with a length of about 5 mm and the segment of the polymer pipe, which places the metal. When installing the valves from above and below the pipe should check the filling density - there should be no free space. According to the diagram over the pipe, about 100 turns of copper wiring are superimposed, which is an inducer connected to the generator terminals. The induction heating of the copper wire occurs due to the vortex currents formed by the variable magnetic field.

Note:Induction heaters can be performed according to any scheme, the main thing is to remember that it is important to carry out reliable thermal insulation, otherwise the efficiency of the heating system will significantly lose.

Safety regulations

For heating systems, where induction heating is used, it is important to comply with several rules to avoid leaks, the efficiency of the efficiency, electricity spending, accidents.

In induction heating systems, the preservation valve is required to reset water and steam in case of failure of the pump.
Pressure gauge and UzO are required for safe work The heating system collected by their own hands.
The presence of grounding and electrical insulation of the entire induction heating system will preize electric shock.
In order to avoid the detrimental effects of the electromagnetic field on the human body, such systems are better to endure the living area, where the installation rules should be followed, according to which the induction heating device should be placed at a distance of 80 cm from the horizontal (floor and ceiling) and 30 cm from vertical surfaces.
Before turning on the system, it is necessary to check the presence of a coolant.
To prevent failures in the maintenance of the mains, it is recommended to connect a boiler with induction heating, made with your own hands using the proposed schemes to a separate power line, the cable cross-section will be at least 5 mm2. Normal wiring may not withstand the desired power consumption.

The modern and most economical water heating device is an induction water heater. Unlike analogs, it is completely environmentally friendly, not dried and does not burn out, responds modern requirements security. Can be used as as flowing water heaterAnd to play the role of a boiler for the heating of the room. The device is usually bought in the store, we offer an alternative - independent manufacture. In the latter case, the device may not have such an attractive external viewBut it will hurt much cheaper.

Pros and disadvantages of induction devices for water heating

The device has pretty simple design And does not require special documents allowing the use and installation. Induction water heater has a high degree of efficiency and optimal reliability for the user. When using it as a boiler for heating, you can not even install the pump, since water flows through pipes due to convection (with heating, the liquid is practically turning into pairs).

The device also has a number of advantages, which distinguishes it among other types of water heaters. So, induction heater:

In induction heaters, water becomes hot due to the pipe on which flows, and the latter is heated due to the induction current created by the coil.

much cheaper than their analogues, such a device can be easily assembled independently;
completely silent (although the coil and vibrates when working, but this vibration is not tangible for a person);
during operation, vibrates, thanks to which dirt and scale does not stick to its walls, therefore it does not need cleaning;
it has a heat generator that can be easily sealed due to the principle of operation: the coolant is inside heating element and energy is transmitted to the heater through an electromagnetic field, no contacts needed; Therefore, do not need sealing gum, seals and other elements that can quickly spoil or leak;
it is easy to break in the heat generator, as the water heats the ordinary pipe, which is unable to spoil or blown, unlike the Tan;

Do not forget that the induction heater service will be much cheaper than the boiler or gas boiler. The device has a minimum of parts that almost never fail.

Despite the huge amount of advantages, the induction water heater has a number of flaws:

the first and most painful for the owners is an electricity account; The device cannot be called economical, so you have to post a certain amount of time for its use;
the second - the device is very hot and heated not only itself, but also the surrounding space, therefore it is better not to touch the housing of the heat generator during its operation;
the third - the device has extremely high efficiency and heat transfer, so when used be sure to install the temperature sensor, otherwise the system may explode.

Induction water heater with your own hands: Scheme

The device is a transformer having two windings: primary and secondary. The first circuit converts electric energy To the vortex currents, thereby creating an induction field of aimedal action, which provides induction heating. On the secondary circuit, the transformed energy is transmitted to the coolant (in our case it is water).

It is important to consider the type of material from which the winding is made. So, in household models, the copper wire is most often used. Such material is well suitable for water heating in boilers.

In addition to the transformer in the device there is a generator and pump (optional).

Scheme of a simple induction water heater. As can be seen, the device has a fairly simple design and a small number of elements.

Heat generator nodes and parts

The device includes:

aC generator that increases current frequency;
inductor transforming electricity to magnetic energy is a coil of copper wire;
the heating element, most often its role plays a metal tube.

Thanks to this design, energy transmission is carried out practically without loss. CPD reaches 98%.

Principle of operation

Induction water heater consists of a generator, coil and core, the latter is heated due to electromagnetic energy

The device converts electrical energy into electromagnetic. The latter, in turn, affects the core (tube), which heats up and transmits heat energy. Converts all these energies inductor consisting of a coil and core. The generator is used to increase the current frequency, since with a standard frequency of 50 Hz, it is difficult to achieve high heating.

In factory models, the frequency of the current reaches 1 kHz.

Flowing induction water heater with your own hands

Before starting to install, you need to stock necessary details. So, the best option There will be a welding high-frequency inverter, smoothly changing current strength range. Such a device will cost the cheapest. A more expensive option will be a three-phase transformer, which is a source of AC power for the water heater inductor. In this case, it is worth using a coil at 50-90 turns, and to take copper wire with a diameter of 3 or more millimeters as a material.

As a core, you can use both metal and the polymer pipe together with the wire (used as a heating element). In the latter case, the wall thickness should not be less than 3 mm in order to quietly withstand high temperatures.

To assemble the water heater, you will need: nippers, screwdrivers, soldering iron and welding machineIf a metal pipe is used.

Installation of induction water heater

Cut the pipe with copper wire by making about 90 turns.

The options for assembling the device There are many. We suggest try collecting the device according to the following scheme:

Prepare workplace, Materials and tools.
Lock a small segment of the polymer pipe (do not forget that minimal thickness The walls should be 3 mm).
Cut the core ends to remain 10 cm in the reserve of the wires for the taps.
At the bottom weapon, mount the corner. In the future, it should be connected here to the reverse of heating (if the heater is used as a boiler).
Tightly lay a chopped wire around the pipe. It is necessary to make at least 90 turns.
Install the tee on the top nozzle through which hot water will be out.
Mount the protective contour of the device. It can be made of both polymer and metal.
Connect copper wire to the water heater terminals, then fill the core with water.
Check the performance of the inductor.

Recommendations. At all conclusions it is better to install ball Valves For the convenience and simplicity of dismantling the water heater in the event of a breakdown. But the pipe is not necessary to fill with metal pieces, since it does not give proper effect. Do not forget to leave the window in the housing to access the welding machine control panel.

Induction water heaters for heating

The heating circuit, where an induction boiler is used as a heat carrier heater.

Such a device has a good proven itself not only as a flow water heater, but also a boiler for heating. True, in this case, the welding machine in the role of the generator is no longer suitable, have to use a transformer having two windings. The latter transforms the vortex currents arising on the primary winding into the electromagnetic field, which is created on the secondary circuit.

In the heating system, the heat carrier may be not only water, but also oil or antifreeze. That is, any liquid capable of conducting electricity.

The boiler from the induction water heater should be equipped with two nozzles for hot and cold water. From the bottom will come cold water, it must be mounted on the introductory line of the line, and on top it is necessary to position the nozzle that will serve hot water in the heating system. As a result, the circulation of water is carried out naturally under the action of convection without a pump.

What you need to know about security

Do not forget that we are dealing with a source of increased danger - an electric heating device, so when it is assembled and used, some rules must be followed:

Be sure to use a separate electrical line to connect the induction boiler, as well as equip it with a security group.

If the water circulation is carried out in a natural way in the boiler, then be sure to equip it with a temperature sensor so that the device is automatically disconnected during overheating.
Do not connect the homemade water heater into the socket, it is better to make a separate line with an enlarged cable cross section for this.
Everything open areas Wiring must be inlated to protect people from shock or burn.
In no case do not turn on the inductor if the pipe is not filled with water. Otherwise, the pipe is melted, and the device is closed or it can also light up.
The device must be installed at an altitude of 80 cm from the floor, but so that about 30 cm remains to the ceiling, it is also not worth installing it in the residential area, since the electromagnetic field does not affect the health of people.
Do not forget to make the inductor grounding.
Be sure to connect the device through the machine to the latter in the event of an accident disabled the power from the water heater.
Need to build a pipeline system safety valvewhich will reduce the pressure in the system automatically.

Conclusion

Induction water heater has a high efficiency, can act as a boiler for the heating system, is also allowed independent assembly and installation, and its use is not regulated by the Law of the Russian Federation. But still before using it, it is worth weighing everything for and against. Despite high efficiency, the device consumes a large number of Energy is considered unsafe (especially homemade) and poorly affects human health. Therefore, we recommend installing the inductor in a private house or in the country.

Induction heating is modern method heat treatment of electrically conductive substances and materials that has the highest coefficient useful action among existing methods. For more economical operation of heating and household appliancesToday, special induction heaters use. How to work induction devices And how to independently make an induction heating device - read below.

The principle of induction heating is based on the effects of AC to wind the transformer and the subsequent occurrence of the electromagnetic field. As a result of the occurrence of the magnetic field, an electrical current is formed between magnetic and non-magnetic details. It is high-frequency currents (TWH) and heating various electrically conductive materials.

Induction heating has a lot of advantages:

The induction heating device is low, so it can be easily used in domestic purposes;
Induction heating is perfect for all types of heat processing, among which welding, soldering, forging;
High-frequency heating can be produced in vacuo, protective gas;
With the help of induction, you can quickly and evenly warm the electrically conductive substances, obtain ultrapure metals.

In addition, this method of heating is super-monomic: it is converted to 90% consumed in heat (despite the fact that conventional electrical heaters have, on average, indicators of 45-50%).

Vortex induction heater

Thanks to the economic benefit, today, induction heating is widely used. The apparatus of vortex induction heating is perfect for premises of up to 60 square meters. m, to make it necessary to make electricity. So, wines can be used for heating of private houses, industrial and warehouses, gas stations, car service and other separate objects.

The main advantages of using wines as a "heart" of the heating system can be attributed to what:

Heating occurs almost instantly, because heat occurs directly into the details;
Over the years, the installation works with the same power, its performance is not reduced;
Compared to conventional electrical heating elements, the induction vortex apparatus saves up to 50% of electricity.

That is why today, more and more, companies for production household appliances and production machines use induction heating. An example of such use, in addition to heating boilers, an induction electric furnace can serve. IN food Industry Ultrasonic induction heater is used. For the heating of metals in the industry, an inverter induction apparatus is used, for smelting non-ferrous metals - a melting-reducing unit, forging iron and the manufacture of blanks - induction electric horn.

PCB induction heater diagram

You can make wines and do it yourself. In order to properly collect the vortex apparatus of induction heating, it is necessary to find a device diagram. The simplest is the scheme pCBwhich is a breaker operating on high-power transistors.

The characteristic differences of such a scheme are:

Heating inductor (coil) in the form of a spiral with 6-8 turns;
The presence of a voltage regulator (can be taken from the old computer unit);
The presence of resistance protecting transistors from overheating.

Transistors in the heater assembled by such a scheme, are recommended to be installed on special radiators: it will avoid the overheating of the device. By the same scheme, you can collect an inductor water heater.

The device of the vortex induction heater includes:

Coil;
Heat exchanger;
Terminal box;
Control cabinet;
Inlet and outlet nozzles.

This scheme is based on a resonant principle of operation occurring in a sequential oscillatory circuit. The magnetic flux between the coils is closed through the air.

To assemble a heater for water heating, the easiest way to use a circuit with a transformer consisting of primary and secondary short-circuited windings. Water will be heated by passing through the pipes inside the coil and fed from the outlet of the outlet.

At the same time, it should be remembered that in water heating systems, it is necessary to use a pump for forced circulation water.

If there is no possibility to set the flow pump, it is possible to select the mechanical heater for a liquid coolant as the heating element or attach the heater on permanent magnets to the wall of the reservoir with the coolant.

Ecode - Dream or Reality? Can the house do not consume energy at all? Answers on the following page:

The simplest induction heater with his own hands

The most budget induction generator can be done by taking a transformer magnetic circuit. A fairly powerful fixture for induction heating can be collected from an electronic transformer, which is a pulse power supply.

In order to collect the device you need:

Discharge the main transformer from the electric;
Make an inductor on the basis of the ferrite cup;
Seat the ends of the wires to the location of the power supply unit.

Such a heater will have an efficiency of at least 65%. This will be enough to collect a small induction electrical oven. In addition, with such a device, it will be possible to quickly melted the wires with a diameter of up to 4 mm.

How to make an induction heater with your own hands: instruction

The device of induction heating can be made from the inverter current source of the welding machine. At the same time, the design can be simplified by placing the straight pipe inside the induction coil. It will work as a core. In order to make the heater you need: polymer trumpet diameter 5 cm; steel wire with a diameter of 0.6 cm; copper wire 3mm; Construction metal fine grid.

Getting to work:

Cut the rod for cuts with a length of 3-6 mm;
We close one end of the pipe with a construction grid;
I fall asleep inside the pipe cut pipe;
We close the mesh the second end of the pipe;
On top of the pipe, perform a winding (turns should be at least 85 and no more than 95);
Insulating the ends of the winding and we attach them to the exit of one of the types of power source of the welding arc.

Device is ready! Now, during the operation of the device, the coil will create an electromagnetic field and vortex current streams. This will lead to the fact that the device will heat up quickly.

Induction heater from the welding inverter: features

In the usual form, induction heaters made from a welding inverter represent an increased danger, because they cannot autonomously control the water temperature. Thus, the use of the heater in the coolant systems can be fraught with short circuits and tipping pipes. This may occur due to high hydraulic resistance in the system, which occurs due to the movement of the coolant through the slices of rod. Therefore, such devices require refinement.

To avoid emergency situations should be supplied homemade apparatus Induction heating made of welding inverter, emergency shutdown devices.

To control heating, you can apply the thermostat with temperature sensor Temperatures and relays opening the chain when the temperature of the coolant reaches the set values. In addition, it will be possible to avoid breaking the system by attaching to the heater through a tee, on one side, a safety valve.

Experienced electricians suggest that the remission of one of the types of power supplies of the welding arc in the heater is not justified: thermal power The heater will limit the electrical power of the inverter.

This heat generator is enough for heating the room, which is no more than 30 square meters. m. Saving funds, in this case, will be 30-50% (depending on the dimensions of the apartment). At the same time, the welding machine is expensive today you will lose.

What is induction heater (video)

Inductive heating is a modern method of thermal processing of electrically conductive substances, which found wide domestic use. So, the vortex induction heaters are excellent for organizing more economical and efficient work Heating system. Make an induction generator, while, can be made independently. The main thing is to take into account the recommendations of professional electricians and fulfill all the work consistently!

The use of induction coils instead of traditional TEN in heating equipment It made it possible to significantly increase the efficiency of the aggregates with less electricity consumption. Induction heaters appeared on sale relatively recently, besides fairly high prices. Therefore, folk craftsmen did not leave this topic without attention and invented how to make an induction heater from the welding inverter.

Induction heaters are gaining popularity from the consumer every day due to the following advantages:

high efficiency;
the unit works almost silently;
induction boilers and heaters are considered sufficiently safe in comparison with gas equipment;
the heater works completely in automatic mode;
equipment does not require permanent maintenance;
thanks to the tightness of the device, leaks are excluded;
due to the vibrations of the electromagnetic field, the formation of scale becomes impossible.

Also, the advantages of this type of heater can be attributed simplicity of its design and the availability of materials for assembling the apparatus with their own hands.

Scheme of the induction heater

Inductor type heater contains the following elements.

Tok Generator. Thanks to this module, the alternating current of the household power supply is converted to high-frequency.
Inductor. It is made of copper wire twisted in the form of a coil to form a magnetic field.
. It is a metal tube placed inside the inductor.

All listed elements, interacting with each other, work on the following principle. The high-frequency current produced by the generator comes to the inductor coil made of copper conductor. The high frequency current is converted by the inductor into the electromagnetic field. Further, the metal pipe, which is inside the inductor, is heated due to the effects of vortex flows arising in the coil. The coolant (water) passing through the heater takes the thermal energy and transfers it into heating system. Also, the coolant acts as a cooler of the heating element, which extends the "life" of the heating boiler.

Below provided electrical circuit induction heater.

On the next photo It is shown how the induction metal heater works.

Important! If you touch the heated part to two inductor turns, it will occur by an inter-touch closure, from which transistors will instantly burn.

Assembly and installation system

Connect the inductor to the terminals of the welding machine, designed to connect the welding cables, cannot be connected. If you do this, the unit simply fails. To accommodate an inverter under work with an induction heater, a rather complicated remission of the apparatus, requiring, first of all, knowledge in electronics is required.

In a nutshell, this alteration looks like this: the coil, namely its primary winding, is required to be connected after the inverter's high frequency converter instead of the built-in induction coil of the latter. In addition, it will be necessary to remove the diode bridge and discharge the condenser unit.

How is the alteration of the welding inverter in the induction heater, you can learn from this video.

Metal Induction oven

To make an induction heater from the welding inverter, the following materials will be required.

Inverter welding machine. Well, if the unit will be implemented a functions of a smooth current adjustment.
Copper tube A diameter of about 8 mm and a length sufficient to make 7 turns around the billet 4-5 cm in diameter. In addition, after turns, there should be free ends of the tube with a length of about 25 cm.

For assembling the furnace, follow these steps.

Pick up any part with a diameter of 4-5 cm, which will serve as a template for winding the coil from the copper tube. It can be a wooden round item, a metal or plastic pipe.
Take copper tube And roll over one end with a hammer.
Tightly fill the tube dry sand And scream the second end of it. Sand will not let the tube break when twisting.
Make 7 turns of the tube around the template, after which the spins of its ends and pour sand.
Connect the resulting coil to the converted inverter.

Tip! If it is assumed that the induction furnace will work for a long time At high power, then it is recommended to bring water cooling to the tube.

Induction heater for water

For the assembly of the heating boiler, the following structural elements will be required.

Inverter. The device is selected of this power, which is needed for the heating boiler.
Tolstoyed trumpet (plastic), you can brand Pn its length should be 40-50 cm. Through it will be held coolant (water). The inner diameter of the pipe should be at least 5 cm. In this case outside diameter will be 7.5 cm. If if inner diameter It will be less, then the performance of the boiler will be low.
Steel wire. You can also take a rod from a metal with a diameter of 6-7 mm. Small pieces are cut from the wire or rod (4-5 mm). These segments will perform the role of heat exchanger (core) of the inductor. Instead of steel segments, it is possible to use a all-metal tube of smaller diameter or steel auger.
Sticks or rods from textolitewhich will sweep the induction coil. The use of textolite will save the pipe from the heated coil, since this material is resistant to high temperatures.
Isolated cable cross section of 1.5 mm 2 and 10-10.5 meters long. Cable insulation should be fibrous, enamel, fiberglass or asbestos.

Tip! Instead of steel wire is allowed to use metal sponge From stainless steel. But before buying them, they are checked with a magnet: if the urine is attracted by a magnet, then it can be used as a heater.

The heating induction boiler is assembled according to the following algorithm. Fill the housing of the heat exchanger with metal products, which were mentioned above. At the end of the pipe, serving the case, solder adapters suitable for the diameter to the pipes of the heating circuit.

If necessary, angle can be soldered to adapters. You should also fresh American Couplings. Thanks to them, the heater will easily dismantle, for repair or preventive inspection.

At the next stage, the heat exchanger body needs to be pasted textolite stripswhich will wear the coil. It should also be made from the same textolite a couple of racks with a height of 12-15 mm. They will contain contacts to connect the heater to the converted inverter.

Mock the coil on top of the strips from the textolite. There should be a distance of at least 3 mm between the turns. Winding should consist of 90 progress of the conductor. The ends of the cable must be fixed on previously prepared racks.

The whole design is placed in the casing, which for safety reasons will perform the role of isolation. A plastic pipe is suitable for a casing with a large diameter than the coil. In a protective cover, you need to make 2 output holes. electric cable. In the ends of the pipe you can install the plugs, after which the holes under the nozzles should be done. Through the last boiler will be connected to the heating line.

Important! Testing the heater can be possible only after filling it with water. If you include it "on dry", then the plastic pipe is melted, and it will have to collect the heater again.

Connection diagram consists of the following elements.

Source of high frequency current. In this case, this is a modified inverter.
Security elements. This group may include: thermometer, safety valve, pressure gauge, etc.
Ball Valves. Used to drain or refueling the system with water, as well as for overlapping water supply on a specific section of the circuit.
Circulation pump. Thanks to him, water will be able to move through the heating system.
Filter. It is used to clean the coolant from mechanical pollution. Due to water purification, the life of the entire equipment is extended.
The expansion tank of the membrane type. It is used to compensate for thermal water expansion.
Radiator. For induction heating it is better to use either aluminum radiatorsor bimetallic, since they have high heat transfer at small dimensions.
Hose, Through which you can fill in the system or merge the coolant from it.

As can be seen from the above method, independently produce the induction heater is quite possible. But it will not be better than purchased. Even if you possess necessary knowledge in electrical engineering, you should think about how much safe operation Such a device, since it is not equipped with any special sensors nor the control unit. Therefore, it is recommended to give preference finished equipmentmanufactured in factory conditions.

The principle of induction heating came to our everyday life relatively recently and immediately gained great popularity. The reason is an infinite search by a person inexpensive and economical heat sources for heating their homes. Many even decided to try to make the induction heater with their own hands in order to attach it to the system of heating a private house. We will try to figure out that from this it turned out and excuses their efforts and time.

Scheme of induction heater

Thanks to the opening of M. Faraday in 1831, the phenomena of electromagnetic induction in our modern life there were many devices heating water and other media. We use an electric kettle with a disk heater, a multicooker, induction hob, since it was possible to implement this discovery for life only in our time. Previously, it was used in the metallurgical and other industries of the metalworking industry.

The factory induction boiler uses in its work the principle of exposure to vortex currents on a metal core, placed inside the coil. The vortex currents of Fouco have a superficial nature, therefore it makes sense to use a hollow metal pipe as a core, through which the heated coolant flows through.

The principle of the induction heater

The occurrence of currents is due to the submission to the winding of the variable electric voltage, causing the emergence of an alternating electromagnetic field changing the potentials 50 times per second at a conventional industrial frequency of 50 Hz. In this case, the induction coil is designed so that it can be connected to the AC network directly. In industry for such heating, high frequency currents are used - up to 1 MHz, so it is difficult to achieve the operation of the device at a frequency of 50 Hz.

The thickness of the copper wire and the number of turns of the winding that the induction water heaters are used separately for each unit using a special procedure under the required thermal power. The product should work efficiently, quickly heat the water flowing through the pipe and do not overheat. Enterprises are investing considerable funds to the development and implementation of such products, so all tasks have been solved successfully, and the indicator of the electric efficiency is 98%.

In addition to high efficiency Particularly attracted the speed with which heating occurs through the medium core. The figure shows the scheme of the induction heater made in the factory conditions. Such a scheme is applied in the aggregates of the well-known brand "Win", produced by the Izhevsk Plant.

Scheme of the heater

The durability of the heat generator depends only on the tightness of the housing and the integrity of the isolation of turns of the wire, and this turns out quite a long time, the manufacturers declare up to 30 years. For all these advantages that actually possess these devices, we must lay out considerable money, induction water heater is the most expensive of all kinds of heating electrical installations. For this reason, some craftsmen took up the manufacture homemade device In order to use it in heating at home.

Homemade induction boilers

SAMI simple scheme Devices that are collected, consists of a segment plastic pipe, The cavity is laid by various metal elements in order to create a core. It can be a thin stainless wire rolled by balls, peeled with small pieces of wire - a roller with a diameter of 6-8 mm or even a drill with a diameter corresponding to internal size Pipes. Outside, it is glued with stalks from a fiberglass, and the wire is wedged with a thickness of 1.5-1.7 mm in glass insulation. Wire length - about 11 m. Making technology can be studied by video review:

Then the homemade induction heater was tested by filling it with water and connecting to induction hobs Factory ORION manufacturing with a capacity of 2 kW instead of a regular inductor. Test results are shown in the following video:

Other masters recommend as a source to take a welding inverter of small power, connecting the secondary winding terminals to the conversion conclusions. If you carefully examine the work done by the author, the conclusions suggest:

The author worked well and its product undoubtedly works.
No calculations for the thickness of the wire, the number and diameter of the coil turns were not produced. The winding parameters were taken by analogy with the cooking panel, respectively, the induction water heater will be capacity no higher than 2 kW.
At best, the homemade unit will be able to heat the water for two heating radiators of 1 kW each, this is enough for heating the same room. In the worst case, heating will be weak or in general will disappear, because the tests were carried out without a flow of the coolant.

More accurate findings are difficult due to lack of information on further testing of the device. Another way to independently organize induction heating of water for heating is shown in the following video:

Cooked from several metal pipes The radiator performs the role of an external core for vortex currents created by the coil of the same induction cooking panel. The findings are as follows:

The heat capacity of the received heater does not exceed electrical power Panels.
The amount and size of the pipes were chosen by chance, but provided a sufficient surface for transmitting heat resulting from vortex currents.
This circuit of the induction heater turned out to be successful for a particular case when the apartment is surrounded by the premises of other heated apartments. In addition, the author did not show the work of the installation during the cold season with the fixation of the air temperature in the rooms.

In confirmation of the conclusions made, it is proposed to watch the video where the author tried to apply a similar heater in a separate warmed building:

Conclusion

Designing and manufacture of induction boilers - the process is not easy and requiring a serious approach. Examples presented show that this moment So far, it was not possible to create a self-made self-made unit in each heating system. Experimental models cannot be offered to homeowners who would like to make a similar induction heater at home.