Home induction water heater: how to do it with your own hands, device, principle of operation, efficiency and operation

We frequently consider conventional heating systems like furnaces or boilers when it comes to keeping our homes toasty and comfortable. But what if heating our water could be done more effectively and sustainably? Presenting the DIY option that’s becoming more and more well-liked among ecologically conscientious homeowners: the home induction water heater. This article will explain how to construct your own induction water heater, examine its internal components, and evaluate its suitability for daily use.

Let’s start by explaining what an induction water heater is and how it varies from traditional heating techniques. An induction water heater uses electromagnetic induction to heat water directly, as opposed to conventional heaters that rely on burning fuel or heating elements. Consider it a high-tech substitute that eliminates the intermediary and provides a more accurate and efficient means of producing hot water.

How then does it operate? Michael Faraday’s 19th-century discovery of electromagnetic induction serves as the foundation for the principle of an induction water heater. In essence, a magnetic field is produced when an electric current flows through a coil. This magnetic field causes electric currents to be induced in other conductors, such as metal containers filled with water, which causes the container to resist and heat up.

Now that we know the fundamentals of induction water heater operation, let’s talk about the doable parts of building one ourselves. The do-it-yourself method entails putting together a few essential parts: a water container, a coil of wire, and a power source. Even for individuals with little technical experience, the process can be completed with the help of a plethora of online tutorials and resources, which will walk you through each step even though it may initially seem overwhelming.

However, in comparison to traditional systems, how effective is a homemade induction water heater? Efficiency is one of the main benefits of induction heating. Compared to conventional methods, where heat is transferred from a source to the water, there is less energy loss because the heat is generated directly within the water. Furthermore, induction heaters have the ability to regulate temperature more precisely, which may result in reduced energy use and utility costs.

In terms of regular use, a do-it-yourself induction water heater can be a dependable and affordable way to heat your house. But, it’s crucial to make sure that the right safety precautions are taken because handling electricity incorrectly can be dangerous. To guarantee your DIY induction water heater operates at its best and lasts a long time, regular upkeep and observation are also essential.

How an induction boiler works

The working principle of induction water heaters is as follows: alternating current must be received on a metal coil (constant current will result in a simple electromagnet), which then forms and rapidly changes the sign and vector of a magnetic field to start vortex processes. The processed object releases the heat it has absorbed.

The frequency above 50 Hz starts to have noticeable effects, and industry uses frequencies closer to 1 kHz more frequently because they can melt metal.

The magnetic field is produced by the inductor, which is a cylindrical coil filled with a lot of copper wire that rotates when an alternating current flows through it. The magnetic induction vector’s continuously varying flux permeates the subject and substance inside or near such a design. The emerging electric field’s lines, which are moving, are perpendicular. Foucault vortex currents are created, which convert electricity into heat that is transferred to the object.

There is no need to touch the inducer when contactive heating takes place, energy is transferred by an electromagnetic field, and as a result, heat loss is decreased and the resource is used more effectively. Water heated by alternating current generated by coils on it comes from the container or from the metal filling inside.

The most roving currents inside the container produce the heat instead of bringing it in. That everything around us stays cold is a benefit. Due to thermal conductivity, heat is only distributed unevenly in the upper layers of the tab and fills the volume; the greater the frequency of the field, the lower the penetration depth and the higher the intensity.

A vortex induction electric water heater is used in this hot water supply scheme:

• The water supply pipe (cold input) is connected to one end of the heating element, the role of which is a vertically located pipe, it also acts as a case for the turns of the wire. The whole structure consists in the casing;
• The second fitting is the output of already heated water;
• EVN is connected to the mains through the voltage converter (inverter);
• The fluid from the supply line moves along the heated round of the inductor cylinder.

The wiring is completed in the same manner as factory boiler wines or regular flow water heaters. This is not a cumulative boiler; there is no complicated binding with a security system. All you have to do is attach the cutting taps and connect the riser’s cold divert. When using riser water that is of low quality, an input filter will be necessary.

The induction direct-flowing water heater functions as both an electric detector housed in a winding-covered casing and a lowering transformer on the vessel.

• Primary – inducer, coil of wires, coil. Here, vortex flows form that form electromagnetic fields that fall on the below element;
• Secondary (short -circuited) – tab, magnetic circuit, case, heater, pipe itself with liquid.

To get alternating current, you have a few choices:

• through a welding machine, transformer, induction stove, similar devices. In this case, high -frequency voltage can be called only conditionally, since there is 50 Hz (domestic value) on the network. But the electromagnetic field nevertheless arises, in the container, Foucault currents (vortex) are introduced, heating begins;
• A special electrical circuit increases the rate of changes in the magnetic field, frequency, and accordingly, heating increases much more intensively, 1 kHz is reached up to 30 kHz or more. This is how microwaves, equipment for melting metals, sterilization devices in medicine work.

The operational power is frequency-dependent; if the cross-section of the winding is too large or the length is too long, it will decrease with insufficient intensity. As the magnetic field changes faster, the number of focal processes increases.

Pros and cons of induction heating of the hot water

Benefits of both factory-made and DIY induction flow water heaters:

• complete noiselessness;
• Efficiency 98 – 99%;
• Due to microvibrations, dirt and scale do not stick, there are no electrochemical reactions, the cleaning is not required, the operation is extended;
• high maintenance, efficiency and simplicity, a minimum of parts – heating is carried out by a pipe segment with a winding – (service life of 10 – 20 years), but this is not a dignity if a radio schema is used;
• compactness;
• environmental friendliness, no combustion products;
• There is no cost of maintenance, do not clean, change the anodes, heating;
• regulated, tuned (decreasing/increasing current strength, winding size).

Since the water does not have time to absorb heat, power is not dependent on its temperature; however, the colder the water gets and the more intensely the duct is used, the cooler the output becomes. For this reason, it is advised that the liquid circulates within the induction water heater for a longer period of time (several sections, separation, wire inside).

• not economical;
• Only a working element is heated, but heat is transferred to space, touching the device is unsafe, the casing does not always solve the problem;
• the risk of an explosion of the system, fire due to overheating, so it is necessary to install a temperature sensor with auto shutdown;
• High price of factory models – an average of 30 thousand. for the product of small power;
• electromagnetic field;
• Without electrical skills, it is difficult to achieve technical characteristics that provide power above 2.5 kW, since the assembly of the frequency converter will be required.

What can you make an induction type boiler

These are the only three primary components of the induction electric flow water heater device. In order to ensure that the heating of the water during its ducting process is significant, the power of the inductor needs to be compared to the workpiece, the number of turns, and the wire thickness.

From a welding inverter or transformer

The following components from an inverter welding machine will be required:

• AC generator, options:

• household weld with setting at the output of 15 – 25 A;
• three -phase transformer;

• wire with a cross section of 6 mm in a metal mesh;
• kitchen brushes;
• leaf workpiece;

The steps involved in making a DIY induction flow heater with a weld for hydraulic devices are as follows:

1. A metal grid is placed in the pipe. Firely fall asleep wire segments (1 – 5 cm).
2. A pipe with a cutting tap for a flexible eyeliner to a cold diverts of the riser is welded to the same end, to another – to supply hot water to the water intake point.
3. 4-5 longitudinal straps made of wood or fiberglass are installed on the cylinder, wrap the wire (90 turns preferably). With ∅60 mm, about 17 m will be required.
4. The ends are connected to the poles of the inverter transformer, preferably without twist. The compounds are isolated.
5. The water heater is assembled, connected to the fittings riser of the water supply and points of water. Use adapters, tees, flexible plumbing hoses.
6. The thermostat is installed on a welder for automatic operation of work.

They use a plastic tank and additional containers for the winding with a container that is enclosed in the case. Mineral wool, polystyrene, and other thermal insulation materials are used to insulate the casing. made a homemade water heater using a transformer in a similar manner.

• Place (cut) with a vertically mesh bottom down, in the same place the entry of the supply, from where the water moves up;
• There is no need for a circulation pump as in the heating system;
• comply with safety precautions when working with electrical appliances, heated objects. The recommended distance to the floor is 80, the ceiling – 30, walls – 30 – 40 cm.;
• There must be a temperature sensor with a relay for auto shutdown during overheating;
• A separate copper wiring line for a welding machine with a protective shutdown automation (RCD, dipavavtomatom, ground) is recommended. The recommended section of 2.5 mm² is enough for a running heater up to 3.5 kW;
• All open wires isolated;
• You can not turn on the inductor with an empty container – there is a risk of melting, fire, close;
• It is not advisable to install in the residential area – the electromagnetic field is harmful.

From induction stove

Videos about operating boilers from induction stoves—typically 2 kW—can be found on the network. This is the same inductor as the kitchen slab’s flat coil.

The incredibly basic creation process:

• The hob of the induction stove is disassembled;
• The native flat inductor is dismantled;
• Connect a homemade heater from a corrugated stainless pipe (∅20) and a flexible eyeliner from a cold feed of the riser with a cutting tap.

The stove indurator must measure the length of the winding cable in order for it to match the specifications of the electric circuit’s field elements. The power will drop and the winding and transistors will burn together if the characteristics are exceeded.

With a winding of electrical fabric

A one-meter length of metal pipe is cleaned, then wrapped in three layers of electrical fabric with copper wire placed on top. You make an induction coil. The design is insulated and isolated, and a refractory plastic casing is applied. The ends are attached to the welding inverter’s terminals. After cutting the cylinder, attach it to the water supply.

Pipe in the pipe and a coil inside the tank

The process for making a "Vesse in the vessel" water heater using induction heating is as follows:

1. Two segments (150 – 500 mm) of the metal pipe are inserted into each other with a gap of 20 mm, which is created by sealed by the ends of two rings.
2. Also attached by tangent (for good circulation) to the body into the outer wall of the input (lower) and output (upper) fitting for connecting to the water supply.
3. The water heater will have a toroidal shape (bagel) – a cylinder with a hole inside.
4. Wrap the copper wire vertically, passing inward and lifting along the outer contour of the case. Make 30 – 40 turns, you get a thoroidal coil – the entire surface will be heated immediately.
5. The structure is placed in a casing, a plastic tank is used, it is made in it for nozzles for nozzles. From the walls are separated by a heat -insulating non -combustible material. The ends of the wire are attached to the terminals of the inverter, connected to the riser and point of water clearance.

As a flowing water heater, you can construct a boiler with a serpentine internal structure; the larger the section of the water that is filled with water, the faster the water will warm up.

In today"s world, where energy efficiency and sustainability are paramount concerns, the concept of DIY home induction water heaters is gaining traction. By harnessing electromagnetic induction, these innovative devices offer an efficient and eco-friendly solution to heating water in households. Understanding the basic principles of induction heating and the construction of such a heater empowers homeowners to take control of their energy consumption. From the simplicity of the device"s design to its cost-effectiveness and reduced environmental impact, homemade induction water heaters present an accessible way to embrace greener living while ensuring a steady supply of hot water for everyday needs. This article delves into the device"s workings, guiding readers through the construction process, explaining its operational efficiency, and highlighting its benefits for sustainable home heating solutions.

Electronic variant

Although the parameters of an electric induction type can be roughly calculated when winding on a pipe and welding an inverter, more precise calculations are required for electric circuits when the part capacity is taken into consideration.

The electronic circuit operates on the constant resonance principle, which doesn’t need to be tuned and starts operating as soon as it’s assembled. With standard components, the output power is mediocre; however, strong field keys and capacious capacitors can raise it. Transistor (up to 25 kHz) and thyristor (up to 8 kHz) converters produce frequencies greater than 50 Hz.

The power supply for the circuit must be between 24 and 60 volts with a minimum of 20 amps of current consumption. In ten seconds, the knife blade heats up to red.

The ready device and its plans:

What is needed (for the plan that follows):

• throttle from a computer power supply;
• From there, ferrite (from powder iron) ring with a copper wire with a cross -section of 1.5 mm², from 10 to 30 turns with a copper wire;
• Field transistors. It is necessary to choose the maximum resistance of the open transition. Suitable from the IRF740, IRFP250 series;
• Diodes for reverse voltage from 500 V with at least 3 – 4 A, suitable UF4007, Her305;
• zener diode for 15 – 18 V up to 2 – 3 watts;
• 0.5 watts resistors.

Information is gathered in accordance with the plan. An induction coil consisting of six to seven turns of 1.5 mm² wire is constructed and connected. The structure can heat up to M6 bolts that are yellow in color. Radiators and a small fan are required because the heat released can harm transistors (from the same computer PSU). As it happens, the frequency is 30 kHz, which is more than sufficient. Control: via 12-inch adapter. Via the diode bridge, the power component can be directly connected to 220 V. Mounting the running boiler on this foundation is still necessary.

The plan and the induction heater that were developed for it:

Building an induction water heater at home can be a satisfying do-it-yourself project for homeowners trying to increase the energy efficiency of their dwelling. You can efficiently use electromagnetic induction to heat water by comprehending the workings of the device and its component parts.

The apparatus is composed of a coil of wire, usually composed of copper, which, when subjected to an electric current, produces an alternating magnetic field. Eddy currents are created in conductive materials by this magnetic field, like water flowing through a pipe inside the coil. As the water passes through the coil, these eddy currents quickly heat it up through resistance.

The efficiency of a home induction water heater is one of its main benefits. Induction heaters heat water directly, eliminating the need to first heat a separate element, in contrast to traditional water heaters that rely on heating elements or gas burners. This makes heating water in your home more economical and ecologically friendly because it uses less energy and heats water more quickly.

Induction water heaters are not only efficient but also provide accurate temperature control. You can easily change the water’s temperature to suit your needs by varying the power given to the coil. By heating the water only to the appropriate temperature instead of overheating it needlessly, this degree of control can help lower energy consumption.

When compared to conventional water heating systems, induction water heaters also require less maintenance. There is less chance of a mechanical failure or gas leaks because there are fewer moving parts and no combustion processes. For homeowners who are worried about the dependability and safety of their water heating system, this can offer comfort.

To sum up, installing an induction water heater in your house can be a useful and effective way to heat the water in your home. You can take advantage of rapid, accurate, and energy-efficient water heating along with lower energy costs and utility bills by utilizing electromagnetic induction. A do-it-yourself induction water heater can deliver dependable hot water for many years with correct installation and upkeep.

Video on the topic

Device and principle of operation of the induction electric boiler