Do-it-yourself resonant water heater. Diagram of the mechanism - Setafi

Heating a metal structure with the help of vortex flows of an electromagnetic coil is popular both in industrial production (for example, in melting furnaces) and in everyday life - take at least electric stoves and boilers. Such devices “bite” a lot in terms of price, so craftsmen have long been looking for ways to create high-frequency water heating from improvised means. In our article, we will just talk about the principles of operation of an induction heater and present our own way of creating equipment at home.

Why do-it-yourself induction water heating is so popular

To understand all the differences from standard heaters, it is worth discussing the principle of operation of the equipment in question. It is based on an alternating current that occurs inside an electromagnetic coil and moves along it. If, for example, an iron rod is inserted into the core of the coil, then under the influence of vortex flows it will begin to heat up, and very productively. That's all the work!

It is important to take into account the fact that the procedure will be successful only if a current with varying frequencies is transmitted to the coil. If you supply a constant power medium, you get a simple electromagnet.

The heating rod is called an inductor. Heating boilers are made with steel cylinders in the form of an inductor, and for cooking stoves, flat coils are installed directly close to the source of heat supply to the panel.

The second component is a circuit that increases the frequency of the transmitted current. We need this because the standard frequency of 50 Hz is not enough to warm up the element abundantly. The wiring diagram also allows you to "overclock" the system right up to 10 kHz, which is enough for the optimal "glow" of the steel core.

Advantages of induction water heating circuits

Undoubtedly, this system has undeniable qualities that the electrode or heating element does not have:

1. The heater is an ordinary piece of metal that does not participate in chemical reactions. Therefore, an induction device can last at least 10-15 years, and fail only due to the failure of the coil, which is a mere trifle to replace.
2. Works great with a variety of heat transfer fluids such as water, antifreeze or even car oil.
3. The inductor is not covered with ten layers of scale during prolonged use.

DIY induction water heater - tips before installation

• Such a heating system will be an excellent tool for a closed heating system with a connected circulation pump.
• The device can be connected to plastic pipes.
• The distance from walls and other devices to the boiler is at least 30 cm, from the floor and ceiling - at least 80 cm.
• Behind the outlet pipe, think over the security system in advance: a pressure gauge, a blast valve, an auto-air vent system.

To make such an option is not an easy task, but the savings will seem after a couple of months of use. If factory induction circuits work for 20-30 years with jewelry accuracy, then a high-quality home-made version can also overtake. And most importantly - you know exactly what the circuit is made of, and you can repair it or replace parts at any time.

Preparing everything you need to make a resonant water heater with your own hands

Remember the main reason why you install the entire system is significant savings in energy costs, after all, the heater copes with the task several times faster than other options (for example, heating elements).

Even a person who does not understand anything in heating systems can independently make an inductor and other parts. Just stick to the information below.

Technological process

Prepare the following items in advance:

1. high-frequency transmitter (suitable from a welding machine);
2. a cut of a plastic pipe with thick walls;
3. stainless steel wire with a diameter of at least 7 mm;
4. adapters;
5. iron mesh;
6. enameled copper wire;
7. forced pump;
8. side cutters;
9. Temperature regulator.

There are no standard parts in the design of the resonant heater. That is why you can literally fix the device with what you find in the garage or buy at the nearest store.

Recommendations

When installing an inverter boiler, consider the following parameters:

1. The inverter must be of sufficient power. For an average inductor, an indicator of at least 15 amperes is sufficient.
2. Pieces of steel wire - 5 cm. Use the side cutter to break the coil into several pieces. These elements will form the basis of the heating rod, which will be inside the winding.
3. The body is a thick-walled plastic pipe. It is desirable that the walls were at least 5 cm in diameter.
4. The adapter is connected to the pipe in the place where there will be a connection to the water supply or heating system.
5. The metal mesh is placed on the bottom of the plastic case. We install it in order to prevent the rod from spilling. Wire rod - cuts of wire that will be heating elements.
6. Cuts of steel fall asleep directly into the plastic case. The procedure is performed until the wire completely fills the entire space.
7. We attach an adapter to the second end of the tube.
8. We wrap the prepared pipe with enameled wires (at least 80 turns, be guided by the indicator 80-90). The correct manufacture of the winding is the most important moment in the construction of an induction circuit.
9. We connect the resulting structure to the water supply system.
10. Install a forced air pump.
11. We fill the pipe with water and turn on the inverter from welding.
12. We put a thermostat at the break of the main line of the inverter. So we can adjust the water indicators automatically.
13. Collect grounding.

Important: you can turn on the entire system only when you have completely filled the pipe body with water. Otherwise, all the steel will melt and the process will have to start from the very beginning.

Do-it-yourself induction water heater - diagram

In order for the do-it-yourself induction heater to work as it should, all actions are performed in a clear sequence (according to the scheme proposed below):

• Heater. We cover one side of the plastic tank with a metal mesh. After we cut off pieces of steel cable and tightly seated inside. There should not be any voids - it is better to check several times. Then we also seat the open end on the grid.
• Inductor - we wrap the “container” with copper wire, which will create vortices. Remember - at least 80-90 skeins.
• Inverter - we take a part from welding, since it is built on thyristors (they quickly convert electricity into the current we need). Also, among the advantages of the thyristor system, automatic control of parameters can be noted. To do this, we will additionally install a thermostat.
• Inclusion. We connect the entire finished circuit with ball valves to heating or water supply.

If you stick to such a small number of actions, then in just a couple of hours you can assemble a very decent water heating system.