How to make an induction furnace and heating boiler from an inverter
Induction heating boilers are devices that have a very high efficiency. They can significantly reduce the cost of electricity compared to traditional appliances equipped with heating elements.
Industrial production models are not cheap. However, any home master who owns a simple set of tools can make an induction heater with his own hands. To help him, we offer a detailed description of the principle of operation and assembly of an effective heater
Induction heating is not possible without the use of three main elements:
inductor;
generator;
heating element.
The inductor is a coil, usually made of copper wire, with its help generate a magnetic field. An alternator is used to produce a high frequency stream from a standard home electrical network stream at a frequency of 50 Hz.
A metal object capable of absorbing thermal energy under the influence of a magnetic field is used as a heating element. If you correctly connect these elements, you can get a high-performance device, which is perfect for heating a liquid coolant and home heating.
Using a generator, an electric current with the necessary characteristics is supplied to the inductor, i.e. on a copper coil. When passing through it, a stream of charged particles forms a magnetic field.
The peculiarity of the field is that it has the ability to change the direction of electromagnetic waves at high frequencies. If any metallic object is placed in this field, it will begin to heat up without direct contact with the inductor under the influence of the created eddy currents.
The lack of contact allows us to make energy losses during the transition from one type to another negligible, which explains the increased efficiency of induction boilers.
To heat the water for the heating circuit, it is enough to ensure its contact with a metal heater. Often, a metal pipe is used as a heating element, through which a stream of water is simply passed. Water simultaneously cools the heater, which significantly increases its service life.
Advantages and disadvantages of the device
The “pluses” of the vortex induction heater are a great many. This is a simple scheme for independent manufacture, increased reliability, high efficiency, relatively low energy costs, long life, low probability of breakdowns, etc.
Productivity of the device can be significant, units of this type are successfully used in the metallurgical industry. By the speed of heating the coolant, devices of this type confidently compete with traditional electric boilers, the water temperature in the system quickly reaches the required level.
During operation of the induction boiler, the heater vibrates slightly. This vibration shakes off the limestone sediment and other possible contaminants from the walls of the metal pipe; therefore, such a device rarely needs cleaning. Of course, the heating system should be protected from these contaminants using a mechanical filter.
Constant contact with water minimizes the likelihood of burnout of the heater, which is a fairly common problem for traditional boilers with heating elements. Despite the vibration, the boiler works extremely quietly; additional sound insulation at the installation site is not needed.
Still induction boilers are good in that they almost never leak, if only the installation of the system is done correctly. This is a very valuable quality for electric heating, since it eliminates or significantly reduces the likelihood of dangerous situations.
The absence of leaks is due to the non-contact method of transferring thermal energy to the heater. Using the technology described above, the coolant can be heated almost to a vapor state.
This provides sufficient thermal convection to stimulate the efficient movement of the coolant through the pipes. In most cases, the heating system does not have to be equipped with a circulation pump, although it all depends on the features and layout of a particular heating system.
Sometimes circulation pump necessary. Installing the device is relatively easy. Although this will require some skills in installing electrical appliances and heating pipes. But this convenient and reliable device has a number of disadvantages that should also be reckoned with.
For example, the boiler warms not only the coolant, but also the entire working space surrounding it. It is necessary to select a separate room for such an aggregate and remove all foreign objects from it. For a person, a long stay in the immediate vicinity of a working boiler can also be unsafe.
For the operation of the device requires electricity. In areas where there is no free access to this benefit of civilization, an induction boiler will be useless. And where frequent interruptions in electricity are observed, it will demonstrate low efficiency. If the device is handled carelessly, an explosion may occur.
If the coolant is overheated, it l turn into steam. As a result, the pressure in the system will increase sharply, which the pipes simply cannot withstand and will break. Therefore, for normal operation of the system, the device should be equipped with at least a manometer, and even better - an emergency shutdown device, a temperature controller, etc.
All this can significantly increase the cost of a home-made induction boiler. Although the device is considered almost silent, this is not always the case. Some models, for various reasons, may still produce some noise. For a device made independently, the likelihood of such an outcome increases.
To make such a device yourself is not so difficult. To do this, you will need:
Make a heating element.
Make an inductor coil of copper wire.
Take a ready-made alternator.
Connect the heater with coil to the heating system.
Connect the coil to the generator.
Connect power to the system.
Make a test run to check the operation of the unit.
In industrial models, a metal pipe with thick walls is used as a heater, but it is very difficult and does not make much sense to provide sufficient power for a home-made device to heat such an element. An induction coil can heat any metal, so the heater can be modified.
A piece of plastic pipe is used as a housing for an induction heater from a welding inverter. It should be slightly larger in diameter than heating pipes. The length of the pipe for the heater can be approximately one meter, the inner diameter can vary between 50-80 mm.
To connect the heater to the system, install adapters in the lower and upper parts of the housing. The lower part of the pipe must be closed with a grill, then a filler consisting of small particles of metal is placed inside the body. You can get filler, for example, from wire, bar, narrow metal pipe, etc.
How to make an induction furnace and heating boiler from an inverter
Induction heating boilers are devices that have a very high efficiency. They can significantly reduce the cost of electricity compared to traditional appliances equipped with heating elements.
Industrial production models are not cheap. However, any home master who owns a simple set of tools can make an induction heater with his own hands. To help him, we offer a detailed description of the principle of operation and assembly of an effective heater
Induction heating is not possible without the use of three main elements:
inductor;
generator;
heating element.
The inductor is a coil, usually made of copper wire, with its help generate a magnetic field. An alternator is used to produce a high frequency stream from a standard home electrical network stream at a frequency of 50 Hz.
A metal object capable of absorbing thermal energy under the influence of a magnetic field is used as a heating element. If you correctly connect these elements, you can get a high-performance device, which is perfect for heating a liquid coolant and home heating.
Using a generator, an electric current with the necessary characteristics is supplied to the inductor, i.e. on a copper coil. When passing through it, a stream of charged particles forms a magnetic field.
The peculiarity of the field is that it has the ability to change the direction of electromagnetic waves at high frequencies. If any metallic object is placed in this field, it will begin to heat up without direct contact with the inductor under the influence of the created eddy currents.
The lack of contact allows us to make energy losses during the transition from one type to another negligible, which explains the increased efficiency of induction boilers.
To heat the water for the heating circuit, it is enough to ensure its contact with a metal heater. Often, a metal pipe is used as a heating element, through which a stream of water is simply passed. Water simultaneously cools the heater, which significantly increases its service life.
Advantages and disadvantages of the device
The “pluses” of the vortex induction heater are a great many. This is a simple scheme for independent manufacture, increased reliability, high efficiency, relatively low energy costs, long life, low probability of breakdowns, etc.
Productivity of the device can be significant, units of this type are successfully used in the metallurgical industry. By the speed of heating the coolant, devices of this type confidently compete with traditional electric boilers, the water temperature in the system quickly reaches the required level.
During operation of the induction boiler, the heater vibrates slightly. This vibration shakes off the limestone sediment and other possible contaminants from the walls of the metal pipe; therefore, such a device rarely needs cleaning. Of course, the heating system should be protected from these contaminants using a mechanical filter.
Constant contact with water minimizes the likelihood of burnout of the heater, which is a fairly common problem for traditional boilers with heating elements. Despite the vibration, the boiler works extremely quietly; additional sound insulation at the installation site is not needed.
Still induction boilers are good in that they almost never leak, if only the installation of the system is done correctly. This is a very valuable quality for electric heating, since it eliminates or significantly reduces the likelihood of dangerous situations.
The absence of leaks is due to the non-contact method of transferring thermal energy to the heater. Using the technology described above, the coolant can be heated almost to a vapor state.
This provides sufficient thermal convection to stimulate the efficient movement of the coolant through the pipes. In most cases, the heating system does not have to be equipped with a circulation pump, although it all depends on the features and layout of a particular heating system.
Sometimes circulation pump necessary. Installing the device is relatively easy. Although this will require some skills in installing electrical appliances and heating pipes. But this convenient and reliable device has a number of disadvantages that should also be reckoned with.
For example, the boiler warms not only the coolant, but also the entire working space surrounding it. It is necessary to select a separate room for such an aggregate and remove all foreign objects from it. For a person, a long stay in the immediate vicinity of a working boiler can also be unsafe.
For the operation of the device requires electricity. In areas where there is no free access to this benefit of civilization, an induction boiler will be useless. And where frequent interruptions in electricity are observed, it will demonstrate low efficiency. If the device is handled carelessly, an explosion may occur.
If the coolant is overheated, it l turn into steam. As a result, the pressure in the system will increase sharply, which the pipes simply cannot withstand and will break. Therefore, for normal operation of the system, the device should be equipped with at least a manometer, and even better - an emergency shutdown device, a temperature controller, etc.
All this can significantly increase the cost of a home-made induction boiler. Although the device is considered almost silent, this is not always the case. Some models, for various reasons, may still produce some noise. For a device made independently, the likelihood of such an outcome increases.
To make such a device yourself is not so difficult. To do this, you will need:
Make a heating element.
Make an inductor coil of copper wire.
Take a ready-made alternator.
Connect the heater with coil to the heating system.
Connect the coil to the generator.
Connect power to the system.
Make a test run to check the operation of the unit.
In industrial models, a metal pipe with thick walls is used as a heater, but it is very difficult and does not make much sense to provide sufficient power for a home-made device to heat such an element. An induction coil can heat any metal, so the heater can be modified.
A piece of plastic pipe is used as a housing for an induction heater from a welding inverter. It should be slightly larger in diameter than heating pipes. The length of the pipe for the heater can be approximately one meter, the inner diameter can vary between 50-80 mm.
To connect the heater to the system, install adapters in the lower and upper parts of the housing. The lower part of the pipe must be closed with a grill, then a filler consisting of small particles of metal is placed inside the body. You can get filler, for example, from wire, bar, narrow metal pipe, etc.
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