How to make a car compressor with your own hands. Do-it-yourself compressor: step-by-step instructions on how to make an air blower from scrap materials

The benefits of a compressor when performing various tasks in a workshop or garage are undeniable. This unit has long ceased to be a property construction crews and departmental vehicle fleets. Here is a superficial list of what can be done with a compressor:

Painting work
Sandblasting of any materials
Blowing debris out of hard-to-reach cavities of units
Cleaning the area
Tire service
Working with pneumatic tools.

An air compressor can be purchased at a store. Moreover, kits of any power and performance are offered.

However, such equipment is not cheap: if you do not plan to make a profit from it, purchasing it simply to facilitate manual labor may seem impractical. Therefore, many home craftsmen try to make a compressor with their own hands.

Important! Air high pressure is a source of increased danger. Easy to assemble or use homemade equipment may cause serious injury.

The simplest (and relatively safe) homemade compressor can be built from a regular car accessory. We will talk about a ready-made electrical device - a compressor for inflating wheels.

It would seem, where should it be used other than for its intended purpose? Design features do not allow large volumes of air to be supplied per unit of time.

This parameter deserves a separate explanation:

The compressor has two important characteristics:

Power

The ability to create high pressure without additional load on the engine.

Automotive units with this full order. You can safely build up pressure up to 5-6 atmospheres. True, pumping up a wheel to the typical 2.5-3 units takes a good ten minutes (at zero initial pressure). During this time, inexpensive devices may simply overheat, so breaks are required.

This occurs due to the low performance of automobile compressors.

Performance

The ability to produce a certain volume of air “over the mountain” per unit of time. The higher it is, the faster the container is filled, and the more intense the flow from the nozzle when direct use compressed air.

To combine these qualities, a large volume of the piston group of the unit and a powerful engine with high speeds are required. Plus, it is necessary to ensure cooling of the cylinders, otherwise the compressor will overheat and jam. Such devices exist; even turbines can be used as a working unit.

But the cost of the equipment does not allow it to be used en masse, especially in everyday life.

Simply put- either power or performance. How to get out of a vicious circle? Use a storage container - a receiver. In industrial designs, this is a steel cylinder, which is slowly filled by a powerful, but not very efficient compressor.

Homemade low-power compressor from an electric motor from a toy. A simple solution to a pressing problem. Such a compressor is quite suitable for supplying air to an aquarium. How to make it with your own hands in detail step by step in this video.

When sufficient pressure has been created, a sufficiently large volume of air can be supplied from the receiver in a short time. Then you need to wait until the compressor restores pressure.
This is how all units work, including those installed on vehicles with air brakes.

This air piston compressor is very easy to manufacture and anyone can repeat it if desired. The compressor can be used to inflate balloons for some chemical experiments where it is required to create air bubbles in a liquid, such as a compressor for aquarium fish and so on.

What is required to make a compressor?

The motor with a 12 V gearbox is the most scarce part, you can buy it here -
Several bicycle spokes.
Two valve nipples from a bicycle.
The power supply is 12 V, you can buy it here if you don’t have it -

Geared motor 12 volt DC, with a rotation speed of 300 rpm.

Bicycle spoke.

Manufacturing

So, if you have collected all the components, we can start making our compressor.
Bend the knitting needle at the end at a right angle.

Using wire cutters, we’ll bite off the knitting needle on the other side so that we get an L-shape like this.

We insert the threaded part of the spoke into the hole in the gear motor shaft. The hole was there originally. We fix it with a second locking nut from another spoke, tightening it with pliers.

Then we take two knitting needles and wind one on the other. We take out the inner knitting needle and bite off part of the wound knitting needle. This is what should happen.

We bite off at a distance of about 10 cm and make a bend.

Next, we put this curl on the part that we made earlier for the gear motor. The limiters were made from locking nuts from the spokes. We fix the nuts with super glue. We have a moving unit. This is the piston arm that will push the compressor piston.

Let's take a piece of wooden board and attach the motor with gearbox and our crank system using a bracket, screws, and wooden block for elevation.

Let's take out the syringe, separate the needle - you won't need it.

We take out the syringe piston and cut the lower edges into a cone to ensure greater ease of movement of the piston, removing excess pressure.

Using a hot soldering iron, on the side closer to the beginning of the syringe, we will make a hole for the nipple valve.

Insert the nipple and secure it with super glue. This will be the intake valve.

Fill the hole for the needle with hot glue - we won't need it.

We make another hole with a soldering iron and insert the exhaust valve, and also fix it with super glue.

For greater reliability and to avoid leaks, we fill the valve connections epoxy resin.

Let's take the paste from a gel ballpoint pen. Cut a small piece about 1 cm. Glue this piece to the end of the piston with super glue.

Let's insert the end from the spoke of our mechanism into it. And install the modified syringe on wooden stand. Everything is fixed with hot glue.

In a car enthusiast's garage you can find many useful and not so useful tools. In addition to the usual set, it would also be useful air compressor. It is suitable for painting a car, inflating tires, and supplying air for operating pneumatic tools. Let's see how to make a car with your own hands. We will also find out how it works and on what principle it works.

Compressed air to help the car enthusiast

Air compressors are quite useful in workshops and garages. There is always a task for these devices. This could be simple cleaning, removing dust that has formed after grinding, or creating air pressure for the operation of various air tools. Compressors are most often used for painting. This imposes some requirements on the device.

Air flow and spray painting

When working with paint, the air flow must be as uniform as possible. Also, the compressed air flow should not contain water particles, oil impurities or other petroleum products. The presence of suspended and solid particles in the flow is unacceptable.

Sometimes you can see defects when painting. This is often graininess on a freshly applied coat of paint. This happens because there were foreign particles in the flow. If paint drips or matte spots are observed, then this is a sign of uneven supply of paint, enamel or varnish.

Branded or homemade?

What is the difference between a branded compressor? Its characteristics are ideal for working with an airbrush or spray gun, but factory products cost serious money. If the device is needed infrequently, then you can save a little and make a unit that will be in no way inferior to factory models.

Compressor operating principle

Both professional and self-made devices work on the same principle. An excessive level of pressure is created in a container for storing compressed air, which is called a receiver. The air itself can be pumped into the receiver either automatically or manually.

If you work manually, it is, of course, very cheap in terms of finances, but it will require serious energy expenditure. You also need to constantly monitor this process. After such work, you will hardly want to do anything else.

If you use mechanisms to pump air, then this will make the process easier. There are no disadvantages here; you just need to change the oil in the air pump, depending on the regulations.

Next, the compressed air flow passes through the outlet valve of the compressor or, in this case, the receiver and is directly supplied either to the airbrush, or to the car chamber, or to pneumatic tool. In general, the principle is very simple, and therefore the simplest working model can be built in a couple of minutes.

Homemade compressor

Let's look at how to make a simple compressor for painting a car with your own hands. As one of the options, let's try to make a device for painting works from a car camera. To create it, we will need a receiver, a supercharger, a spool from a damaged chamber, a repair kit, and an awl. When everything you need has been collected and prepared for work, you can begin assembly.

At the assembly stage, you need to check the tightness of the chamber. To do this, you can use a car pump. Every motorist knows how to do this. If the rubber holds the air pumped into it, you can move on to the next step.

If air leaks are detected, then you can use a repair kit or vulcanize the hole with raw rubber.

On next stage in the so-called receiver you need to make holes for another spool. This will be the exit valve. This fitting can be glued using the same pre-stocked repair kit. We will connect this valve to the airbrush. The nipple must be unscrewed from the fitting. The compressor circuit provides for the free passage of air. We will not unscrew the nipple in the main spool. He will hold the pressure.

Then, using the scientific method, we will try to determine the required level of pressure in our receiver. A spray gun is used for this. If the paint goes on smoothly, without jerking, drips or anything else, then everything is done correctly. It is advisable to control the amount of excess pressure in the receiver. When you press the airbrush button, the level should not jump.

As you can see, this is the most primitive compressor for painting a car yourself. Now you can create masterpieces or simply repaint the body.

It is not difficult to assemble this unit, and its benefits can be verified by various repairs. If you have used it for painting before, then you will definitely be able to appreciate all the benefits.

Just remember that under no circumstances should liquid, dust or anything else get into the spray gun or the chamber. If damaged, dust or moisture will mix with the paint and the work will have to be redone. Then no adjustment of the spray gun will help. It will be more convenient if our camera is mounted on something. This will prevent it from moving on the floor.

This model works great and is already quite usable. But it’s even better to make the injection system automatic with small changes. Next we’ll find out how to make a more serious compressor.

Semi-professional equipment

Professionals say that such homemade equipment has a huge resource and service life, unlike factory models of foreign brands and domestic manufacturer. But this is understandable, because, knowing the operating scheme, if any part fails, it can be easily replaced. Let's see how to make a compressor that can be used for professional purposes.

What will you need for assembly?

So. Here you will need easily accessible spare parts for the compressor. This is a pressure gauge, as well as a reducer with a filter. You also need a relay to control the pressure in the chamber, a fuel filter from the car, a water pipe with internal thread by ¾. In addition, you should select adapters with threads, clamps from the car, a motor, a container for the receiver, 10w40 oil, a toggle switch for 220 V, brass tubes, and oil-resistant rubber hoses. These compressor parts can easily be found in the garage.

Thick wood will be used as the basis for the unit. You will also need a syringe from the nearest pharmacy, anti-corrosion liquid, fasteners, sealants and FUM tape, paint, a needle file, wheels from office chair and a filter from the car's power system.

So, knowing the principle of operation of the compressor, it’s time to start construction. Let's start with the supercharger.

Engine as a supercharger

We will use a compressor from old refrigerators as a motor. Often it already has a built-in start relay, which in our case is very convenient. This will automatically support required pressure in the receiver chamber. It is better to use a motor from old Soviet refrigeration units. They have higher characteristics compared to imported products.

Preparatory procedures

Feel free to remove the working part from your old refrigerator. Naturally, the part needs to be cleaned, because over the years the block has become overgrown with centuries-old dust, and also, possibly, rusted. After cleaning, you can treat the body with a rust converter to protect the unit from corrosion. So, preparations for painting have been made.

Change the lubricant in the control unit. It was rare that a refrigerator received maintenance according to the regulations. This system is almost completely isolated from environmental influences. Semi-synthetic is suitable for changing oil. It is no worse than specialized compressor fluids.

Entry, exit and oil change

Definitely has tubes. Two of them are open, one is sealed. Open tubes are used for air inlet and outlet. To find out which tube is the input and which is the output, you can turn on the power briefly. Next, remember which tube releases air.

The refrigerator compressor diagram says that the lubricant needs to be changed through a sealed tube. You should very carefully file the end of the tube. It is necessary to cut so that the chips do not get inside. Next, you need to break off the tip and pour the old grease into a jar. Then, using a medicine syringe, fill in more lubricant than was poured out.

In order for the unit to work properly, the lubricant tube must be sealed. The screw will help us with this suitable diameter. It needs to be wrapped with pre-prepared FUM tape and screwed into the long-suffering pipe.

Next, use the prepared fasteners to attach this device to the board. The electronic part is very position sensitive. Therefore, the top cover of the relay is marked with an arrow. Operating modes will only be switched if installed correctly.

Choosing a capacity for the receiver

As practice shows, it works best for painting if you use a used fire extinguisher as an air container. These cylinders are good because they contain the necessary safety margin. In addition, the fire extinguisher is designed for Another good thing about this choice is that various attachments can be placed on the cylinder body. Let's take, for example, a metal 10-liter cylinder from the OU-10. It holds a pressure of 15 MPa and has high strength.

Fire extinguisher preparation

Feel free to twist the locking and starting device right away, we won’t need it. And you need to screw the adapter into place, having previously wound the FUM tape onto the thread. If the body is rusty, you need to treat the rust either with chemicals or sandpaper.

On the outside, everything in the fight against corrosion is very, very simple. What about corrosion inside? Pour the cleaner into the bottle, and then you need to mix the product very well. Next, screw in the crosspiece from the water supply. And don't forget to seal threaded connections. Now everything is almost ready.

We install attachments

We almost made a compressor for painting a car with our own hands. To make it easy to move, the best option- this is the fastening of all components and parts on one platform. We have it wood slab. The motor from the refrigerator is already attached to it, and now you need to place a fire extinguisher-receiver there.

Holes for fastening must be made in the slab in advance. The motor from the refrigerator is already fixed with studs and nuts. The fire extinguisher should be positioned vertically. To do this, you can use plywood. For this you will need three sheets.

In the first sheet, cut a hole suitable for the diameter of the cylinder. Secure the rest to the stove. Next, secure these plates to the plate along with the sheet with the hole using glue. To make the fire extinguisher conveniently placed on the platform, you can make a recess under the bottom. To make our device maneuverable, take out the prepared furniture wheels and screw them onto the platform.

Protection from dust and small debris

Naturally, the equipment must be maximally protected from dust. To do this, we will use a car. The filter must be mounted in the air intake.

How to do it? Let's use a rubber hose. It should tightly press the autofilter fitting and the compressor inlet tube from the refrigerator. There is no need to clamp the hose with clamps on the inlet tube. There is no high pressure there.

Moisture protection

An oil and water separator needs to be installed at the outlet part. It will prevent liquid or petroleum particles from entering the system. To do this, you can use a filter from the diesel power system. The connection is made using the same hose. But here you already need to strengthen the connections with a clamp, because there will be decent pressure at the outlet.

Denouement

The diesel filter must be connected to the gearbox inlet. It is necessary to decouple the pressure at the inlet and outlet of the refrigeration compressor. To do this, you need to screw the high pressure outlet of the supercharger into the left and right parts of the cross.

We attach the pressure gauge

A pressure gauge is mounted at the upper entrance of the cross. We will use it to monitor pressure. You also need to tighten the adjusting relays. Do not forget that the threads must be sealed.

Importance of Relay

This device makes it possible to regulate pressure levels within a wide range. It can, if necessary, interrupt the power supply to the refrigeration motor. For these purposes, either PM5 or RDM5 is suitable. Both devices will start the motor if the pressure drops and turn off when it rises. The pressure level is adjusted using springs from above. So, using the large one we set the minimum levels, and the small one - the maximum limits.

Electricity

To make it all work, we connect the neutral power wire to the relay, and connect the second wire to the refrigeration motor.

Let's pass the phase wire through the toggle switch to the second contact of the compressor. This will allow you to turn off the power faster. Naturally, after connecting, you need to reliably insulate it all.

So we made a compressor for painting a car with our own hands. All that remains is to paint, configure and test it.

Adjustment and first tests

After putting all this together, you can safely move on to the first tests. Connect an actuator to the output of the unit. Then plug the cord into the outlet, set the relay to the lowest setting and turn on the toggle switch. Look at the pressure gauge readings. If you are sure that the relay turns off the motor, you can check the tightness. To do this, use the old-fashioned method with soap.

If everything is fine, then bleed the air from the receiver. When the pressure drops, the relay should start the engine. If everything works, then painting with a spray gun will no longer cause difficulties.

First samples

To test the unit in operation, any unnecessary part will do. There is no need for any surface preparation here. It is important to determine operating pressure by trial and error. Using experiments, determine the figure at which the pressure is enough for complete painting without frequently turning on the engine.

As you can see, it is quite simple to make for painting. This unit can already be fully used for professional activity. The costs will definitely pay off soon. A compressor is needed not only for painting work. It has a very wide range of applications. And the semi-automatic system will allow you not to be distracted from work.

Spray guns

In addition to the compressor, airbrushes will also be needed for painting work. To do this, you need to purchase a pneumatic model. The right airbrush will allow you to carry out the work successfully. The tool should be selected based on the characteristics of the compressor.

The spray gun for a car should be selected correctly in accordance with the operating pressure. At wrong choice The pressure will drop too quickly, and the quality of work will be very low. There are several technologies that are used in this tool. They need to be selected based on the task. For example, modern technology LVLP allows you to use paint very economically with low air consumption, and the surface will be of high quality.

How to set up a spray gun?

High-quality painting is only possible with properly configured equipment. Setting up the spray gun allows you to change the width of the torch, air pressure, and paint flow.

With the width of the torch, everything is very clear. Maximum width - maximum speed, uniform application. For touch-ups, the torch is reduced, but the air supply is also reduced.

Adjusting the paint flow is also easy. Many specialists open it to the maximum. But the air supply can cause difficulties. For correct settings you will need a compressor, instructions for a specific spray gun. You need to use a sheet of Whatman paper and direct a spray jet at it. If the flame is shaped like a figure eight, reduce the pressure. If the paint is applied in droplets, add it. Find the optimal position.

The compressor can be used in the most various areas — for inflation of tires, airbrushing, painting of spare parts etc. Possessing necessary tools and certain technical knowledge, it is quite possible to independently manufacture this unit based on a conventional refrigerator. A homemade compressor produces about 7 atmospheres, which is quite enough for an ordinary garage workshop, so many people are increasingly thinking about how to make such a compressor? DIY refrigerator compressor it will turn out to be quite quiet and, most importantly, cheap in terms of cost.

On average, the production of this unit will require about one thousand rubles for all components.

Before you try to make ours out of an old refrigerator, you need to compare these two options, i.e. , sold in specialized stores, and our homemade version. Total can be identified several main differences between them:

The design of the factory compressor contains an electric motor that transmits torque to the working chamber through a belt drive. As for the homemade compressor, it consists of a housing and the engine itself, without belts.
The factory version already has automatic pressure relief systems, inlet and outlet filters, pressure meters, etc. installed. In a compressor from a refrigerator, you will have to install the control equipment yourself, taking into account all the features.
Although most factory compressors are equipped automatic systems, some budget models do not have this feature. In other words, these units will have to be turned off independently, noting the time on the clock. Homemade compressors are mainly equipped with a protective relay that turns off the engine if there is a risk of overheating.
Some factory models may not have any lubrication at all. Of course, their service life is short, but they do not emit various emissions. This circumstance is very important, especially if the spray gun behaves rather capriciously, not tolerating various impurities. As for homemade compressors, there is plenty of this oil. By the way, you need to pay attention to which one you pour - synthetics do not combine very well with regular ones, so you don’t need to pour just anything.
main feature homemade compressor is that it works very quietly, especially if you put all the tubes on it correctly, maintaining a tight seal. As for factory compressors, they are noisier, so their use is only possible outside the home.
The cost of manufacturing a homemade compressor is very low, because we take the main components from old technology, and the adjustment equipment will cost us one thousand rubles. As for the factory compressor, the situation is different.
It is impossible to introduce any technical changes. In other words, if the unit is not powerful enough, then it can only be used as a pump, nothing more. Homemade options The good thing is that you can add some parts to them, for example, a large receiver, thanks to which you can significantly increase the power of the device.
Factory compressor are complete technical device, so any improvisation with it is impossible. With a homemade unit, you can do almost anything - take some parts outside the body, or hide everything in one box and attach a handle on top for easy transportation.
You can install a fan on a homemade compressor to cool the device from the outside.

Read also: Review chargers for AA batteries

Majority refrigeration compressors have some limitations in terms of their work. There are several modes in total:

Normal - from 16 to 32 C.
Subnormal - from 10 to 32 C.
Tropical - from 18 to 43 C.
Subtropical - from 18 to 38 C.

However, it is more common combined modes, having a different range.

Thus, a homemade compressor can be much more efficient than factory ones, in terms of working with air.

The video shows a version of a homemade compressor for inflating wheels

Dismantling works

To make a homemade compressor from a refrigerator, you need to make initial preparations. It consists in certain dismantling works, i.e. We simply need to remove the compressor from the refrigerator itself. It is located at the back of the refrigerator, in the lower part. To remove, we need a basic set of tools: pliers, spanners and two screwdrivers (positive and negative).

On the compressor there are tubes that are connected to the cooling system. These tubes must be bitten off using pliers, but under no circumstances should they be sawed off with a hacksaw. The fact is that with this method, small chips inevitably form, which can get inside the compensator.

Then we move on to removing the start relay - it is an ordinary black box with wires sticking out of it. We unscrew the fasteners, then cut the wires that lead to the plug. We must remember to mark the top and bottom of the starting relay - this will be useful to us in the future. By the way, we also take all fastening elements along with the unit itself.

Functionality check

After we have removed the compressor, it is necessary check its functionality.

The fact is that we are removing the device from an old refrigerator, so we need to make sure that our unit is still “alive”. So, we flatten the tubes with pliers - this is necessary so that air flow passes through them. Next, we need to put the start relay in the position in which it was in the refrigerator design. This is very important, because if the position is incorrect, there is a risk of damage to the device, as well as failure of the compressor winding.

There are wires on the relay body to which you need to screw a piece of wire with a plug. It is better to wrap the connection point with electrical tape to eliminate the risk of electric shock. We plug the device into a power outlet. If you did everything correctly, the compressor will work, and air will flow from its tubes. By the way, it is necessary to mark which tube the air flow comes out of and which one it goes into.

Step-by-step instruction

Before you start making your own, you need to make sure you have everything necessary materials and tools.

We invite you to watch the video from detailed description process of one of the manufacturing options

Read also: Selecting oil for an air compressor

In addition to the compressor itself, which we previously removed from the refrigerator, we will need:

Receiver. In this case, you can use the body of an old fire extinguisher, or weld the body from sheet metal and pipes.
Various hoses. In this case, the length of one hose must be at least 600 mm, and the other two - about 100 mm. In this case, you can take hoses from the car.
Various Consumables- gasoline and diesel filters, wire, clamps, pressure gauge and epoxy.
Related tools, i.e. screwdrivers, pliers, drills, etc.
In addition, we need the usual wooden plank, which will be the basis of the entire structure. We attach the compressor to it using ordinary self-tapping screws. The fastening should be carried out exactly in the same position that it occupied in the refrigerator design.

We take any plastic container suitable volume (from 3 liters or more). In the upper part you need to drill a couple of holes to fit the size of the outlet tubes. We insert the tubes, and then fill everything with epoxy resin. The inlet tube into which the air enters must be located in such a way that there is about 200 mm from its end to the bottom of the receiver. The outlet tube should be immersed ten centimeters inside.

This is a description of a plastic receiver, but for greater tightness it is best to make the receiver in an iron case. In this case, there is no need to fill everything with resin, and the hoses are simply welded. In addition, only an iron receiver can install a pressure gauge.

To install it, you need to drill a hole for the nut on the receiver body. We insert it, and then brew it. Only then do we screw the pressure gauge into this nut, after which the work is completed. Now we attach the receiver to our base using wire. The scheme will be something like this:

Our homemade unit almost ready.

There are quite a lot of photos and videos of its work on the Internet, for example, it is shown how it is used in airbrushing and for painting various spare parts, so the feasibility of its manufacture is quite obvious. Finally, we need to add a few additional touches to our device.

You need to take one of the hoses, which is ten centimeters long, and put it on the filter. If this is difficult, you can slightly heat the end of the hose to make it easier to fit onto the fitting. We put the second end of the hose on the inlet of our device. In this case, the filter will protect against dust from entering the housing. The second 10-centimeter hose needs to connect the inlet of the receiver and the outlet of the compressor. In this case, it is better to tighten the connection points with clamps. Our third hose needs to be put on the diesel filter, and the other end must be inserted into the outlet of the receiver. In this case, the free filter fitting will subsequently be connected to various equipment for airbrushing, spray painting, etc.

Another video on the topic

Some technical data and service features

It is quite difficult to say unambiguously what pressure a particular compressor will show. Much depends on the specific brand and service life of the device itself. By the way, old units show even better performance than modern ones.

Read also: We repair Resanta voltage stabilizers with our own hands

Serving our homemade device- this is very important point in operation.

The main work will consist of replacing diesel and gasoline filters, as well as changing the oil in the device. The design of compressors usually includes three copper tubes. We used two of them earlier, and the third remained untouched. It is the shortest and sealed at the end. So, the oil is drained through it. To do this, it is necessary to cut off the sealed part, and then drain the treatment. Filling is done through it.

Does the compressor need to be repaired?

As for repairing the resulting device, then everyone decides for themselves here- whether it makes sense to tinker with this or not.

The repair will consist of ringing the relay, as well as changing the oil in the device. If the manipulations carried out did not help, then there is absolutely no need to come up with something else. It is best to throw away the used device and then make a new one. Moreover, the price of the issue is no more than 1000-1500 rubles.

Conclusion

Basically, we figured out how to make a compressor from a refrigerator.

The feasibility of its manufacture can hardly be overestimated, because with the help of this device it is possible to produce various works for airbrushing, tire inflation, painting various components and other work that requires pressure.

An additional advantage is that such a device can be used at home, because it makes little noise. In fact, this is the same refrigerator, only without unnecessary body parts.
Compressors recommended for ordering are presented below:

Description and characteristics

CALIBER KMK-800/9

Compressor type - piston oil

Engine type - electric

Power - 800 W

Max. compressor capacity - 110 l/min

Min. pressure - 0.2 bar

Max. pressure - 8 bar

Receiver volume - 9 l

Drive (type) - direct

To paint a car, as a rule, a paint spraying device is used. This is an air compressor and a spray gun connected to it. If you are planning such equipment for your garage, you can make a compressor yourself or purchase a factory model.

It's quite obvious what to buy ready product much simpler. This entails less labor costs. However self-production- This is a significant financial saving. In addition, experts say that a homemade powerful electric compressor for a car with a relay and receiver can be much more efficient and durable than a serial product. Below we will tell you how to make a compressor for painting a car under 220V voltage yourself.

DIY compressor for painting cars

Obviously, for work we will need to collect certain materials. So, to assemble a homemade 220V air compressor for painting a car, we will need the following parts:

pressure gauge;
gearbox with oil and moisture protection filter;
relay for pressure regulation;
cleaning filter for gasoline engines;
crosspiece for water with thread inside;
threaded adapters;
clamps;
motor;
receiver;
engine oil;
switch for 220V voltage;

Materials for a homemade compressor

brass tubes;
oil-resistant hose;
wooden plank;
syringe;
rust remover;
studs, nuts, washers;
sealant, fum tape;
enamel for metal;
saw or file
furniture wheels;
diesel engine filter.

Compiling this list is not difficult. After we have collected everything we need, we can get to work.

Assembling the engine

We start work from the very beginning important element- an engine that will create the required amount of air pressure. Here we can use a motor from an unnecessary refrigerator.

Its device includes a relay, which will be needed in order to maintain a given air pressure. Experts say that old Soviet models can achieve higher pressures than new imported engines.

We remove the motor from the refrigerator, carefully clean it and treat it with a product to avoid oxidation of the housing. After this it will be ready for painting.

Removing the refrigerator motor

Now you need to change the oil in the engine. Semi-synthetic is quite suitable for this - it is no worse than motor oil and has a lot of useful additives.

The motor has 3 tubes: 1 closed and 2 open, through which air circulates. In order to determine the input and output channels, turn on the motor and remember where the air flows in and where it comes out from. The closed tube is used just for changing the oil. When working with a file, we make a cut in such a way as to avoid sawdust getting into the tube. We break the end, remove the oil and pour in a new one, using a syringe for this purpose.

To seal the channel after changing the oil, select a screw of a suitable cross-section, wrap sealing tape around it and screw it tightly into the tube.

We mount the motor together with the relay on a thick board, which will act as a foundation. We choose the position in which it was in the refrigerator. This is necessary because the start relay is extremely sensitive to how it is placed. As a rule, there are corresponding markings on it - adhere to correct location in order for the relay to work stably and correctly.

We mount the motor on the prepared board

Air tank - necessary element, which is necessarily included in the compressor device. It must be designed for a certain amount of pressure in order for the device to work correctly. We can use old containers from ten-liter fire extinguishers as a receiver - they are durable and airtight.

Instead of a start valve, we screw a threaded adapter onto the receiver - for tightness we use a special FUM tape. If the future receiver has pockets of rust, they must be removed by grinding and processing by special means. In order to eliminate pockets of corrosion inside, pour in the product and shake well. Then we install the water cross using sealant. We can assume that the homemade receiver is ready.

We use an old fire extinguisher as a reservoir for compressed air

Assembling the device

We attach the fire extinguisher receiver together with the motor to a base made of a thick board. We use nuts, washers and studs as fixing means. The receiver must be positioned vertically. To attach it, we take three plywood sheets, in one of them we make a hole for the cylinder. We attach the remaining two sheets to a wooden base and a plywood sheet that holds the homemade receiver. To the bottom wooden base wind the wheels furniture fittings for better maneuverability of the mechanism.

We put a rubber hose on the compressor inlet tube, to which we connect a cleaning filter for gasoline engines. Additional clamps will not be needed since the inlet air pressure is relatively low. To avoid the presence of moisture and oil particles in the air flow, we install an oil-moisture separating filter for diesel engines at the outlet. Here the pressure will already be quite high, so special clamps with screw fastenings should be used for additional fastening.

The diagram below shows how to assemble a homemade automobile compressor for painting a car.

Compressor diagram for car painting

Next, we connect a filter to remove oil and moisture to the input of the gearbox, which we will need to decouple the pressure in the engine and the cylinder. We make the connection via a water cross with the left or right side. On the opposite side of the cross we install a pressure gauge to monitor the pressure level in the cylinder. We mount a relay for adjustment on the upper end of the cross. All connections are sealed using sealant.

Using a relay, we can supply the pressure we need to the receiver, while ensuring stepwise operation of the mechanism. The relay is adjusted by two springs, one of which sets the upper pressure limit, and the second - the lower one. We connect one contact to the supercharger, the second is connected to the zero phase of the network. We connect the second network input of the supercharger via a toggle switch to the mains phase. The toggle switch will make it possible to turn the device on and off from the power supply without removing the plug from the outlet. We carry out soldering and insulate all electrical contacts. After painting, our homemade car compressor will be ready for testing.

Homemade compressor for painting a car

Testing and setting up a homemade compressor for painting cars

For testing, we connect a spray gun to the output. We put the toggle switch in the off position and turn on the plug electrical outlet. Set the relay regulator to the lowest value and turn on the toggle switch. For control we use a pressure gauge. We make sure that the relay regularly opens the network at the right moments. Using water with detergent We check how tight all hoses and connections are.

Next, we empty the container of compressed air - after the pressure drops to a certain level, the relay should turn on the motor. If everything works fine, you can try to use the device to paint a suitable object. We look at the quality and make sure that the device works stably and can be used to work on cars.