Useful crafts: making an air compressor with your own hands. DIY air compressor DIY small compressor

An air compressor is necessary for every car owner, since it is very expensive to use the services of car services for any problem. For the urban car enthusiast living in high-rise building, quite compact, portable electric pump for inflating tires. If there own garage, a compressor device is already a mandatory measure. The device is useful for connecting a pneumatic tool, for repairing and painting a car. It is quite possible to make a compressor yourself, which will save up to 50% of the cost of a production plant.

Principle of operation

The homemade compressor works according to an elementary scheme:

An electrically powered or manual type pump is connected.
Air under pressure enters the container with a sealed design (a receiver or a cylinder is used).
The design has an outlet valve that directs air through the hoses to the spray gun, wrench, tire inflation adapter, etc.

As auxiliary elements a manometer is used to control the pressure and an automatic system to release excess air. To prevent rapid wear of the device and ensure a high-quality work result, filters are connected to the output line to protect against the ingress of oil and moisture.

An air compressor is essential for every car owner.

Compressor from a fire extinguisher with a motor from a refrigerator

To create a homemade compressor, an OU-10 fire extinguisher or equivalent is suitable.

The procedure is carried out in stages, below are detailed instructions:

Clean the cylinder from the inside and outside of the remnants of the foam solution, dirt, rust and other contaminants.
Insert the adapter into the thread, installation must be carried out tightly.
Fix a quadruple to the adapter, female thread, size ¾ inch.
In the motor from the cooling installation, you should find the tip of the oil fill tube. Bite off the end with side cutters and replace the oil.
Drain the previous grease into a container with measured marks to determine the amount of oil.
Using a syringe, inject new oil into the electric motor, add 10–12% when calculating the amount.
Plug the oil filler tube again, you can squeeze the ends or insert a bolt wrapped with fum tape.
Find a starting relay in the motor, which, together with the cylinder, should be installed on the frame of the future unit. As fasteners, it is better to use bolts, but ties will also work.
Install a gasoline-type filter on the air intake pipe to clean the resulting air. Installing the filter involves installing a rubber adapter.
Fasten the fuel filter from the diesel engine with a device for separating moisture to the outlet line from the supercharger with clamps. Without a filter element, drops of water and oil will get into the paint.
Connect a reducer to the line to maintain pressure inside the cylinder.
Behind the reducer, the hose is attached to the quad.

Compressor from a fire extinguisher with a motor from a refrigerator

The remaining quad inlets are equipped with a pressure gauge and a relay to control the pressure level.
To adjust the minimum and maximum pressure on the cylinder, a control relay is installed spring type. Connect it with one wire to the engine, and the other side to the negative wire of the network. The wire for connecting to the "plus" is connected to the start button. For a quality connection, soldering and high-quality insulation are used.

Compressor from a gas cylinder with a supercharger from a truck

An alternative way to make a DIY compressor is to use gas bottle at 50, asynchronous motor and a compressor from the braking system in the ZIL-130. All elements are installed on the frame, but you can do without it and make load-bearing element from a cylinder to which a pump, filter, electric motor, work control equipment are attached.

The simplest do-it-yourself compressor block can be made according to a step-by-step guide:

Weld the fitting into the air inlet line from pumping unit to the receiver.
Fix the adapter for the output line from the receiver to the pneumatic tool.
Weld the fitting for mounting the pressure gauge.
Attach an adapter to connect the reset valve, it can be replaced with a relay. When pressure rises to critical levels, pressure will be released.
Insert a ball-type valve to remove condensate from the bottom of the cylinder.
Fasten the pump and motor with a drive belt that is mounted on the shaft pulleys.

Compressor from a gas cylinder with a supercharger from a truck

Create electrical system settings: button to turn on, off, connect 2 capacitors with a capacity of 30 microfarads and a starting element of 60 microfarads, a time relay and a magnetic type starter.
Install a device for filtering the air flow against the supply line.

Making powerful car compressor for painting can be performed according to various schemes. The main advantage of these methods is the availability of materials.

Making an air electric compressor 220 V with your own hands

Making a compressor with your own hands is easier than it seems at first glance. Let's take a step-by-step look at the basic principles of how to make a compressor.

Necessary materials

Properly preparing materials is half of the successfully completed work on assembling a compressor unit. To create a classic device with operation from a 220 V network, you will need:

manometer;
relay for pressure control;
gearbox with built-in oil and moisture protection filter;
cleaning filter from a gasoline engine;
water cross with internal thread;
threaded adapters;
clamps or ties;

Making air electric compressor do it yourself

engine;
receiver;
engine oil;
switch for operation with voltage 220 V;
brass tubes;
oil-resistant hose;
board;
medical syringe;
substance to eliminate corrosion;
washers, nuts and studs;
means for creating hermetic connections;
car enamel;
file;
small wheels from toy cars or furniture;
diesel engine filter.

Assembling the engine

Let's prepare the motor first. Its role is to build up air pressure. In order not to buy a special engine, you can use the engine from an old refrigerator.

Motor from an old refrigerator for making a compressor

There is a relay in the device of the power unit, it is useful to maintain the selected pressure value in the system. Professionals note that Soviet refrigerators were equipped with more efficient motors, they are suitable for creating a compressor with greater power compared to imported products.

First of all, the motor is removed from the refrigerator. To make it usable, you will have to clean the case. It is important to apply detergent which will prevent oxidation and corrosion. After cleaning the surface, the motor is suitable for painting.

Assembling a homemade compressor:

The motor contains 3 tubes: 1 sealed and 2 open for air circulation. The definition of the output and input channel is required: the easiest way to find out about the role of the tubes is to turn on the motor.
After external treatment, the oil must be changed. A semi-synthetic agent is best suited, which is not inferior in characteristics to a motor one and contains various useful components. For replacement, a plugged tube is used, the end of which is cut off with a file. It is important to prevent sawdust from entering the system, therefore, after making a file, you need to break the tube and inject new oil with a syringe.
It is important to properly seal the oil filling passage to prevent leakage. A screw with an appropriate section is selected, a fum tape is applied to it. In the process, a sealant will come in handy. The bolt is tightly screwed into the pipe.
The motor and relay are fixed on a thick base board. The sensitivity of the relay requires that the angle of the motor location that was present in the refrigerator be observed. Additionally, a marking is installed on the engine with the recommended housing location for stable and full-fledged operation.

Compressed air tank

The air tank is an integral component of the compressor, without which the unit will not work. When choosing a tank, it is important to consider the amount of pressure that the cylinder can withstand (indicated on the body). An alternative option would be to use a receiver, old containers from a 10-liter fire extinguisher, since these tanks are sealed and quite reliable.

The air tank is an integral component of the compressor, without which the unit does not work.

The start valve is replaced by a threaded adapter that is screwed onto the receiver. Creation hermetic connection will ensure the use of fum tape.

In the presence of foci of corrosion on the receiver, it is pre-cleaned sandpaper or grinder. To remove rust from the inside, pour into the container special agent and mix thoroughly. Next, a water-type cross adapter is installed, it is mounted using a sealant.

Assembling the device

The final assembly is carried out in stages:

The prepared receiver and motor are attached to a thick board. For fixing to the base, washers, nuts and studs are used. The location of the tank is strictly vertical. A reliable connection will be provided by 3 sheets of plywood, on one of which a hole is cut to insert the container. The rest of the sheets are attached to the wood and the receiver's plywood retainer. From the side of the floor, furniture wheels are welded to the bottom for ease of movement.
A rubber hose is put on the air capture tube, to which a cleaning filter from a gasoline engine is attached. Separate clamps for attaching the filter are not required, because the inlet pressure is low.
To prevent the ingress of oil and water particles into the working composition, an oil and moisture separating filter from the diesel engine is installed on the outlet tube. Due to the relatively high pressure in the wire, it is recommended to use auxiliary fasteners, screw clamps will do.
A cleaning filter is installed at the inlet of the gearbox; it will be required to create an isolation and direction of air movement. The connection is made with a water pipe type cross on both sides. A pressure switch or pressure gauge is installed on the opposite side to control and adjust the pressure level in the receiver. An adjustment relay is installed on top of the cross. All elements are mounted hermetically.

Materials for assembling a homemade compressor

Adjusting pressure ensures intermittent operation homemade design. To set the relay, 2 springs are actuated: one for setting the maximum pressure, and the second for the minimum.
The contact of the electrical circuit is connected to the supercharger, and the second is connected to the "minus" phase. The second wire is connected to the supercharger through a toggle switch and with the mains phase. The toggle switch acts as a start button for activating and deactivating the device without removing the plug. All contacts are connected by soldering and then insulated.
Painting of metal structures.

After creating the compressor, it remains only to check its performance.

Testing and setting up a homemade

Having made a powerful compressor with your own hands, you should connect an airbrush to it.

Check algorithm:

Set the position of the toggle switch to the inactive position, connect the plug to the electrical circuit.
Initially, set the relay to a low value and start the installation. Control the work according to the readings of the manometer. Now the user should make sure that the relay is working, it should open the circuit when the indicators are exceeded.
Used to check for leaks soap solution, which wets all compounds.
Now the spray gun is turned on to release the container from air. If the system is in good order, after the pressure drops, the device should turn on.

If the device has passed all the stages of verification, it is recommended to try the device in action by trying to paint the body element. The greatest attention is paid to the quality of the layer and composition, as well as the stability of work.

We test and set up a homemade compressor for painting cars

The tank must be cleaned inside and out, otherwise progressive corrosion will create a hole. sandblasting machine one of the most efficient and simple ways cleaning. created with relative ease.
Before the start of work, body elements are straightened. You can go the standard route and use a hammer, hoods, spotter and then paint the body, but the designed one helps repair the damage without painting.
Be sure to paint with an airbrush after applying the primer. extremely effective, but has features of work and compatibility with other materials.
Before painting, all adjacent elements are either dismantled or pasted over, especially for glass. If paint gets on glass, there is a risk of damage to the material in the process of removing the agent. The auto glass repair kit will help restore glass from most damage. Roof rails on the roof of a car are difficult to dismantle, it is better to cover with a film and wrap it with tape.

Conclusion

When making a compressor electric type manually can save a lot of money. Additionally, the design can be retrofitted to create an apparatus suitable for specific purposes. Finished installation often used for painting, connecting a sandblaster, blowing the body after washing and inflating wheels.

Almost all motorists who make something every day in their garage understand perfectly well that with tools and components in their hands, you can always create something you need.

In the same way, it is possible to create a whole compressor for painting a car from a conventional compressor for a Soviet-style refrigerator.

That's just how to do it in technical terms, and in what order?

Therefore, due to the frequently asked questions of beginner self-taught masters, in this article you will learn how to make such a compressor on your own and from manual materials.

Which compressor to choose (factory or homemade)

The main criterion that should be followed when choosing a station for painting is a uniform distribution of air, without foreign particles.

If such impurities come across, then the coating will be with small defects - graininess, shagreen, cavities. At the same time, streaks and stains can form due to these particles, so it is best to entrust the painting to a branded air compressor, but there is only one catch - such a device is too expensive, which many motorists cannot afford.

You can save money and at the same time create a functional model by creating functional equipment, which is described in many videos and articles.

You will only have to spend your precious time studying the material, and then creating equipment that must be of at least high quality.

The model presented by the factory or homemade does not play a role, because the principle of its operation is the same and it consists in creating excessive pressure. That's just the method of air injection is completely different - it can be extracted manually or mechanically.

In the second case, this is a significantly higher cost of funds, the manual method is economical, but time-consuming, requiring constant monitoring.

Automatic inflation does not consume your strength, but the product requires periodic maintenance, which is worth only the process of changing the oil for the compressor.

This is the only way to achieve uniform air supply and distribution. After studying the theory, you realize how easy it is to make a compressor station that will work well, while it does not take much time.

We collect the compressor unit from improvised means -

If you decide to create equipment for painting your own car, then you should stock up on certain materials for this:

The reverse function will require a car camera;
For the supercharger function, you will need a pump with a pressure gauge;
chamber nipple;
Repair kit and awl.

When all the components are prepared, you can begin to create a compressor station. To check how tight the chamber is, it is necessary to pump it.

If the problem still exists, then it can be solved in two ways - by gluing or by vulcanizing with raw rubber. In the resulting reverse, it is necessary to make a hole for supplying compressed air so that it comes out evenly.

A special nipple is placed in the hole for this. The repair kit will serve for the implementation of additional fasteners of the fitting. To check the uniformity of the air supply, it is enough to unscrew the nipple. Native nipple allows you to get rid of excessive pressure.

The level of pressure is determined during operation, when the paint is sprayed. If the enamel on the metal lies evenly, then the installation is functioning. At the end of the procedure, it is worth determining the pressure indicators, for this it is enough to spray paint on the body of your car.

If the enamel lies without tubercles, then the device is functioning efficiently. In addition, pressure indicators can be monitored using a special device - a pressure gauge. But, its indicator after pressing the aerator should not be chaotic.

As you can see, special tools and knowledge are not required to create such a compressor. At the same time, repairing and painting a car in this way is more effective than using a spray can.

Remember that neither dust nor water should get into the car chamber. Otherwise, you will have to re-paint the car.

If this installation is used correctly and with the use of all knowledge, then it will last a long time, and if you also automate the pumping of air, then the process itself will go quickly.

Alternative to a professional device (compressor from the refrigerator)

Home-made compressor devices serve much longer than the presented time, even in comparison with installations of domestic and foreign production.

This is quite natural, because creating it with our own hands, we do everything for ourselves on highest level. Therefore, people even thought about how to create a compressor from a refrigerator, which will be on a par with the installations of popular companies.

But to create it, you should stock up on such components as a pressure gauge, a relay, rubber adapters, an oil and moisture separator, a fuel filter, a gearbox, a motor, a switch, a hose, clamps, brass tubes, but also little things - nuts, paint, furniture wheels.

Creating the mechanism itself

Buying a compressor from an old refrigerator from the Soviet era can simplify the whole procedure. This will not pull too much on the budget, while there is already a compressor start relay.

Foreign competitors are inferior to this model, because they are not able to develop such a high pressure. But the Soviets cope with this task.

After removing the execution unit, it is advisable to clean the compressor from layers of rust. To avoid the oxidation process in the future, it is worth using a rust converter.

It turns out that the working motor housing is ready for the painting process.

Installation scheme

The preparatory process is completed, now you can change the oil. Since the refrigerator is old and it is unlikely that it underwent constant maintenance, it is worth updating this moment.

Since the system was always located far from external influences, maintenance work was justifiably not carried out there. For this procedure, expensive oil is not required, semi-synthetic is enough.

At the same time, it is not worse in terms of the presented characteristics of any compressor oil and has many additives used with benefit.

Inspecting the compressor, you will find 3 tubes, one of them is already soldered, but the rest are free. Open are used for air inlet and outlet. To understand how air will circulate, it is worth connecting the power to the compressor.

Write down for yourself which of the holes draws in air and which releases it. But the sealed tube must be opened, it will serve as an opening for changing the oil.

The file is necessary for the implementation of the tube file, while making sure that the chips do not get inside the compressor. To determine how much oil is already there, drain it into a container. With the subsequent replacement, you will already know how much it will have to be poured.

Then we take a spitz and fill it with semi-synthetics, but this time expect that the volume should be twice as much as it has already been drained. When the container is filled with oil, it is worth turning off the engine lubrication system; for this, a screw is used, which is pre-formed with a fum tape and placed simply in the tube.

Do not be alarmed if drops of oil periodically appear from the outlet air tube. This situation is not so difficult to resolve, find an oil and moisture separator to homemade installation.

The preliminary work is over, only now you can proceed to the direct assembly of the installation. And they start with strengthening the engine, it is best to choose a wooden base for this and in such a position that it is on the frame.

It is worth noting that this part is very sensitive to position, so follow the instructions on top cover where the arrow is drawn. Accuracy is important in this matter, because the correctness of the mode change directly depends on the correct installation.

Where is compressed air located?

A cylinder capable of withstanding high pressure is a container from a fire extinguisher. At the same time, they have high strength indicators and can be used as attachments.

If we take as a basis the OU-10 fire extinguisher, which holds 10 liters, then we should count on a pressure of 15 MPa. We unscrew the locking and starting device, instead of which we install an adapter. If you have identified traces of rust, then these places should be treated without fail with a rust converter.

Externally, it is not difficult to remove it, but it is more difficult to clean it internally. But the easiest way is to pour the converter itself into the cylinder and shake it well so that all the walls are saturated with it.

When the cleaning is done, the plumbing cross is screwed in and we can assume that we have already prepared two working parts of a self-made compressor design.

Carrying out the installation of parts

Earlier it was already stipulated that a wooden board is suitable for fixing the engine and the fire extinguisher body, it is also even easier to store working parts.

In terms of mounting the engine, threaded studs and washers will serve, just think in advance about making holes. Plywood is required to fix the receiver vertically.

A recess is made in it for a cylinder, the second and third are fixed to the main board using self-tapping screws and hold the receiver. To give the design maneuverability, you should screw the wheels from the furniture to the base.

To prevent dust from entering the system, its protection should be considered - the use of a coarse gasoline filter can be considered an excellent option. With its help, the function of an air intake will be easily performed.

Since the pressure indicators are low at the opening with the inlet of the compressor equipment, it will not be necessary to increase it.

After creating an inlet filter for the installation work on the compressor, do not forget to install an oil / moisture separator at the end to avoid water droplets in the future. Since the outlet pressure is high, you will need car clamps.

The oil-moisture separator is connected to the inlet of the reducer and the pressure outlet of the supercharger. To control the balloon pressure, the pressure gauge itself should also be screwed in on the right side, where the outlet is located on the opposite side.

To control pressure and power at 220v, a relay is installed for adjustment. As an actuator, many masters recommend using PM5 (RDM5).

This device responds to work, if the pressure drops, then the compressor turns on, if it rises, then the device is pumped out completely.

To set the proper pressure, the springs on the relay are used. The large spring is responsible for the minimum indicator, but the small one for the maximum, thereby setting the framework for the operation and shutdown of the self-made compressor installation.

In fact, PM5 are ordinary two-pin switches. One contact will be needed to connect to the zero of the 220 V network, and the second to combine with the supercharger.

A toggler is needed to disconnect from the network from it and save yourself from constant running around in the direction of the outlet. All connected wires must be insulated for safety reasons. When these works are carried out, you can paint over the installation and check it.

Pressure regulation

When the design is assembled, it is quite natural to check it. We connect the last components - an airbrush or an air gun and connect the installation to the network.

We check the operation of the relay, how well it will cope with turning off the engine, and monitor the pressure with a pressure gauge. If everything works properly, proceed to the leak test.

The easiest way to do this is to use soapy water. When the tightness is checked, we bleed the air from the chamber. The compressor starts when the pressure drops below the minimum limit. Only after checking all the systems and bringing them into working condition, you can proceed to the procedure for painting parts.

For painting, you only need to determine the pressure and not load yourself with pre-treatment of the metal. To carry out painting with a uniform layer, it is necessary to experiment and determine atmospheric indicators in this way.

It is important to use the supercharger as little as possible. Each motorist will deal with the components and begin to manufacture an automobile compressor.

Can choose different variants production, but the use of starting the navigator, automatic pressure control is more complex structure, but its use is one and pure pleasure.

In this case, you do not have to take time to control the receiver, which will open up more opportunities, and you can start painting a car, a fence or even a gate.

Routine maintenance is a mandatory procedure in order to extend the life of your homemade compressor.

To change the oil - drain or fill it, you can use a regular syringe. Replacement of filters is carried out only if necessary, when the speed of filling the reservoir chamber is reduced.

Connecting components of the compressor

When it is decided which compressor to choose and reverse, it is worth considering the issue of combining them. At the same moment, it is worth determining how the air will flow to the airbrush. The unit that is mounted to the receiver is responsible for the distribution of air.

The main thing is that these components are compatible with each other. The pressure switch is responsible for turning the compressor off and on. RDM-5, although it is used for water supply systems, but this perfect option for our case - for the relay.

The bottom line is that the connection element fits the external inch thread. To find out what pressure is in the receiver, you must use a pressure gauge and first consider the size that is suitable for the connection. We apply pressure to the air preparation unit and adjust it within 10 atmospheres, at this stage it is necessary to attach the oil separator filter.

The pressure gauge allows you to check the pressure, and the filter allows you to prevent the ingress of oil particles from the receiver. Elbows, tees and even fittings are the next components that will have to be prepared for installation. To understand the exact number, you need to think over the scheme, choose an inch as the size.

After resolving the issue with adapters, it is important to consider the moment of installation of the structure, most often chipboard boards are used for this. The design of your station should be maneuverable, because it will have to be moved around the workshop, in order to simplify your work, you should attach roller legs to it.

You won't have to invent here for a long time, just visit the furniture store, where there are a lot of such furniture wheels. To save space in your workshop, you can build a two-story structure. But here it is better to stock up on large bolts to fix the structure. To make it easier to prepare for this step, make a list of required items.

Assembling a semi-professional air blower

The assembly begins with the removal of the fire extinguisher twist and the installation of the transition device. After removing the fire extinguisher valve, install the adapter there.

Four components are immediately installed on a durable hose - a reducer, a pressure switch and an adapter.

The next step will be fixing the wheels for installation on chipboard sheet. Since the design is planned on two levels, it is necessary to make holes for the studs where the fire extinguisher will be placed.

The accumulator is easier to assemble, because there are brackets on both sides. The lower part is fixed to the base, and for installation homemade equipment serves as the top.

To reduce vibration when installing the compressor, silicone gaskets are used. The hose connects the outlet and the inlet of the air preparation.

The next step will be the connection work. Jumper, protective elements– all this needs to be thought through.

The entire connection chain is carried out through the relay and the switch, assuming that the entire connection goes according to the scheme: the phase wire goes to the switch, the next connection is the relay terminal. To carry out grounding on the relay, a special wire is wound up.

Which is better: buy or make a compressor yourself?

Compressor equipment on the market is represented by a large assortment. Piston components, vibration units, screw stations - all these are components that are used in other areas.

If you wish, you can not waste your time creating the installation, it is presented at any point of sale of auto parts or on specialized sites.

Such an extensive range greatly complicates the choice of the desired product. But if you decide to purchase a station, in this matter you should be guided by technical indicators, cost and reviews of those who have already managed to evaluate it.

If you are chasing warranty periods, then you should pay attention to the models of popular brands. Expensive products are worth buying if you are on professional level doing repair work.

Products that do not have a name and status can let you down, so it’s better to spend money once and not take risks in this matter again. Many manufacturers budget options save on components.

As a result, you will encounter frequent breakdowns and replacement of parts, while warranty repairs will take a long time. Therefore, many motorists are well aware that a do-it-yourself installation is sometimes more reliable than a factory one.

Such products with technical indicators win. For example, the components homemade device for painting a car it lasts much longer - compressors from refrigerators can work for decades, a fire extinguisher also has a colossal margin of safety.

You can always improve the performance of your compressor yourself, everything is in your hands, but you can’t experiment like that with a factory device.

Garage neighbors will probably get it when they see a well-made and well-thought-out device.

Conduct high-quality painting cars in garage conditions Maybe. To do this, you need to arrange a convenient spray booth, as well as equip essential tool. Buying expensive equipment for many car owners can not afford, so you have to make a compressor for painting a car with your own hands. This operation is much cheaper.

For the competent manufacture of this device, you will need to familiarize yourself with the theoretical part. Thanks to this preparation, in the process of subsequent work, it will be possible to avoid the appearance of graininess, shagreen or dust particles mixed with paint on the painted surface.

The operation of almost any compressor, factory or home-made, is based on the same principle. An increased pressure is formed in the sealed cavity, which is higher than atmospheric pressure, and then it is directed and dosed.

For injection, a mechanical or manual method is used. In the second case, energy savings are obtained, as well as independence from the presence of power supply points near the working area. When automatic feeding air into the working cylinder, you will need to control the presence of oil for the air compressor.

Before you make a compressor for painting a car yourself, let's prepare the tools. There is a way in which the working element is a car camera. To do this, select the components according to the list:

working chamber from a car or truck;
a pump with a built-in pressure gauge for pressurizing;
additional nipple for the camera;
hard awl;
camera repair kit.

We first check the tightness of the selected chamber. To do this, it is pumped up and lowered into the water. If leaks are found, be sure to get rid of them.

We mark in the free space the point where the installation of the second nipple is supposed. In this place we make a hole with an awl. The fitting must be glued using a repair kit. Through it, a uniform air supply will be ensured.

The initial nipple built into the chamber is necessary to maintain the working pressure at the required level. The performance of the installation is determined by the final result. When the paint is evenly distributed, this indicates correct assembly and sufficient pressure in the container. The pressure gauge built into the pump will help you choose the right parameter.

When such a home-made compressor for painting a car is working, you should try to prevent moisture and small debris from getting inside the cavity. This will ensure maximum cleanliness of the painted surface. It is also desirable to prevent condensation inside the chamber.

advanced compressor

With proper assembly and regular care behind the device, a home-made compressor can last much longer than the factory one. With all this, it is unlimited in repair parts, and can also be improved and refined from time to time.

The basis for a more progressive model are the elements of the old refrigerator:

receiver for compressor;
pressure gauge 10 atm;
a relay that provides pressure control inside the compressor;
adapters with pipe thread;
gasoline cleaning filter;
a reducer with the filter protected from moisture and oil;
water cross with ¾ inch thread;
electric motor for compressor operation;
hydraulic hose clamps;
semi-synthetic oil;
oil resistant hose;
copper pipes;
medical syringe;
wooden plate;
rust remover;
power system filter;
hardware elements;
furniture wheels;
sealant, sealing tape;
a small file or saw for metal;
electric switch (220 V).

The advantage of earlier models of refrigerators is the presence of a starting relay. Also positive is the rather powerful pressure that the compressor develops. Using a rust converter, we clean the problem areas on the body and working elements of the unit being prepared.

It is advisable to carry out a small maintenance of the compressor, replacing the oil in it with a semi-synthetic one. Modern oils contain a sufficient amount of additives to ensure long compressor operation. Its design has three nozzles, one of which is hermetically sealed. In the other two, air circulation will be carried out. To determine the direction of flow, you will need to connect the device to the mains.

The sealed pipe hides half the oil. Having bitten off with wire cutters or sawed off its end with a needle file so that the chips do not get inside the cavity, carefully drain the liquid into the prepared container. This is how we define required amount replacement oils. It must be infused with a syringe of the same volume that was removed through the tube.

After topping up, we plug the hole with a screw or self-tapping screw wrapped around the thread with sealing tape. Now the installation of the entire structure begins on a wooden base or a welded frame from a building profile. Compressors from refrigerators are quite sensitive to position in space. To determine it, there is a special arrow on the case. The correct operation of the entire node depends on this.

As a container for air fit regular foam or powder fire extinguisher. It is advisable to select it so that the cavity is at least 10 ... 12 liters. Usually they are tested to withstand pressure up to 15 ... 20 MPa. To release the cavity, we unscrew the adapter with the locking and starting device.

If areas with corrosion are found on the surface, then it is necessary to eliminate them., preventing the spread of rust, which can lead to through damage. Such phenomena are unacceptable, as they contribute to the depressurization of the container.

A rust converter can be poured inside the cavity and shaken well, then poured and dried. Outside, we fix the water cross.

General installation of the structure

The most convenient option would be the location of all parts on a wooden base. For installation, drilling holes and fixing the elements with bolts and nuts are used. You can also use a sheet of plywood, to which everything is easily attached with self-tapping screws. 360 movable wheels are installed on the bottom plate or frame for greater mobility.

Gasoline coarse filters will help provide sufficient protection against the ingress of fine dirt or moisture. They are usually mounted on the side of the air intake. An inlet tube is placed on this side, which can be held even without clamps, since there is no high pressure in this place.

On the outlet side, you will also need to install a protective filter that will protect the air flow from moisture and oil particles from the compressor. Fuel filters are used as such a blocker. Without clamps, such a knot will not stand.

We will mount an adjusting relay, as well as a pressure gauge to control the pressure, into the output cross. We connect the free plug to the gearbox. Using the relay, it will be possible to adjust the pressure height range in the receiver.

PM5 (RDM5) is used as an actuator. It was originally used in plumbing systems, but since it is a two-pin switch, it will work in our case. One contact goes to the connection with the supercharger, and the second to the “zero” of the 220 V network.

Using the toggle switch, we connect the phase of the network. It will help you quickly, if necessary, turn off the power supply, so as not to run to the outlet for this.

Pressure monitoring

Having collected all the elements together, we need to check the performance of the mechanism. To do this, we connect the device to the mains, and set the relay to the minimum pressure supply. We monitor the pressure gauge readings during system operation.

After checking the relay, you will need to identify possible places of loss of tightness. For this operation, a prepared soap solution is used. It is made thick in the form of gruel. We coat problem areas with a solution on a running compressor. If air bubbles appear, then seal the leak.

During a possible drop in pressure to critical values, you can install additional air pumping with the compressor turned on. After receiving positive results during the test, you can.

Satisfactory pressure for the operation of the system is selected empirically. In this situation, it is necessary to choose the settings so that everything happens at the minimum values of the blower drawdown. With this design, you can paint any surface.

Budget compressor option

Building a paint compressor can be quite economical. It can also be based on elements from an old refrigerator, and any airtight cavity is usually used for a container with air:

worked out oxygen balloon. It is able to withstand high pressure parameters, but has the disadvantage of a large mass.
propane tank. It has the same positive qualities as oxygen.
Fire extinguisher. Models with a volume of 10 liters or more are suitable, as they have a better ability to tolerate high pressure. However, at the exit they have a metric thread.
Hydraulic accumulator. The cavity has a good volume with sufficient working pressure. Requires some modifications to get rid of the membrane and metric threads.

At the next stage, we combine the receiver with the compressor. It is necessary to provide for maximum compatibility of connectors for connecting a relay capable of turning off the compressor at the right time. You can also use RDM-5.

The pressure gauge is selected with maximum values at the level of 10 atm. We select fittings, tees or corners with an inch thread. This will facilitate assembly and ensure maximum air passage through the channels. To accommodate the structure, the use of chipboard is allowed.

As a result, the list of necessary elements will be in the following configuration:

Prepared compressor;
Receiver for distribution of air flows;
Pressure switch connected to the network;
Pressure gauge up to 10 atm;
Filter reducer;
Emergency release valve;
Transitional threaded elements;
Sealing elements (tape, paste, etc.);
Wiring, plugs and on/off elements;
Hose protecting against moisture and oil;
Particle board;
Hardware elements, wheels, gaskets.

If you are afraid of the number of spare parts and the complexity of manufacturing, you can always purchase an inexpensive factory-made compressor.

Mounting the receiver in the form of a hydraulic accumulator will be the easiest, as it is already equipped with the necessary brackets. They can also be used to mount the compressor from above. Get a two-tier design.

As fasteners, it is desirable to use bolts with hooks, passed through pre-drilled holes. This will provide greater structural stability.

It will be possible to reduce the influence of vibrations with the presence of rubber / silicone gaskets used as damping.

With the help of prepared flexible tubes, we connect the compressor outlet and the inlet to the receiver. Be sure to put protective mechanisms in the form of filters. Power is supplied to the switch and relay. The structure must be grounded.

To make a compressor yourself, you will need a refrigerator, more precisely, just one part of it. Often such a device is used together with a spray gun or an airbrush.

It makes almost no noise during its operation, has small size while creating quite a lot of pressure. Such a unit is also suitable for inflating automobile wheels.

What will we need?
1. The motor installed in the old refrigerator is the compressor. In general, all models are quite similar, if there is a difference between them, then it is not significant.

The black box attached to the side is the relay from which comes the power cable with plug.

2. The container into which the compressor will pump air is the receiver. For such purposes, any hermetically sealed iron or plastic 3-10-liter container is suitable. Alternatively, you can use a fire extinguisher, a tank from a truck, a small cistern or a can of building fluids.

receiver

3. For the manufacture of the compressor, you will need three hoses: a pair of 10 cm and one 30-70 cm long (depending on the characteristics of the receiver). Automotive hoses are ideal, as they will be connected to their own, “native” filters.

4. Another hose or tube is required to connect the compressor to the air consumer. The material of the product, as well as its length, are determined by specific needs. If you plan to use the compressor with an airbrush, a thin polyvinyl hose will also work. The one that comes with the airbrush can also be used. If you plan to use the compressor on outdoors, it is better to find a thicker hose.

To make a compressor, you will also need:

Clamps (5 pcs. 16 or 20 mm each);
Copper or iron 6 mm tubes, one at a time (the diameter may be larger, the main thing is that hoses fit on them). The length of the first tube is 10 cm, the second is 20-50 cm;
One filter per car (diesel and fuel);
Epoxy resin, soldering iron, welding machine;
Pressure gauge (optional);
Base for the receiver and motor (a wooden board of the appropriate size will do);
Steel tape;
self-tapping screws;
The next set of tools: screwdriver, drill, pliers, knife, metal file.

Making a refrigerator compressor

There are three tubes at the compressor outlet: sealed (the one that is shorter) and the other two are open. You need to figure out which one is the input and which one is the output. To do this, slide your finger over the inlets of the tubes, after connecting the compressor to the network. The one that blows out the air is the exit, the one that draws it in is the entrance. Unplug the compressor and note the position of the inlet and outlet.

Saw off a couple of tubes with a metal file, leaving at least 10 cm for easy connection of hoses. Alternatively, you can try to bite off the necessary part of the tubes with pliers. Most importantly, make sure that sawdust does not get inside.

Now the compressor needs to be fixed on a wooden base by screwing its legs with self-tapping screws. For a more secure fixation, we recommend using bolts. You need to fix the compressor in exactly the same position as it was done in the refrigerator. The fact is that the relay functions under the influence of gravity. After fixing the compressor on a wooden base, you can go directly to the receiver.

If a plastic container is used as a receiver, drill two holes in its lid for installing tubes and insert them there. Fix the tubes using epoxy for this. Leave outside (on top of the lid) 2-4 cm of tubing. Use a 10 cm tube as the outlet tube.

The second should be much longer and practically reach the bottom of the receiver. It is necessary to keep the inlet and outlet as far apart as possible - this will ensure the best mixing of air in the receiver itself.
For a metal receiver, you need to do the same, with the only difference being that the tubes need to be soldered or welded. Nuts can also be welded, and then hose fittings must be screwed into them.

The pressure gauge is installed only in the iron receiver.

Just drill a hole in it and solder (weld on) the pressure gauge. However, it will be more convenient to weld a nut into the hole, and screw the pressure gauge into it. So, if it breaks, it can be easily replaced with a new one.

Now you need to fix the receiver on a wooden base. Attach steel tape by installing directly next to the motor. Use self-tapping screws for this.

We go further - we put on a 10-centimeter hose on the gasoline filter. With the appropriate hoses (for a gasoline filter), there will be no difficulties, but polyvinyl pipes may have to be heated in order for them to fit on the filter. This can be done with a lit match or by holding them a little in boiling water. The other end of the hose must be put on the compressor inlet tube. An inlet filter is required to filter dust. In this case, it is not necessary to use clamps on the connections: there is completely no pressure here.

Another piece of hose is needed to connect the "inlet" of the compressor to the "outlet" of the receiver. On their connections you need to put clamps.

We put one end of a 10-centimeter piece of hose on the outlet pipe of the receiver, the other on the diesel filter. Each of the filters has an arrow indicating the direction in which the air moves through them, so there will be no difficulty in connecting them correctly. The diesel filter, which is installed at the outlet, is necessary to filter water from the air.

The working hose connected to the airbrush must be put on the outlet fitting of the diesel filter.

From below, rubber feet must be screwed onto a wooden base. Alternatively, felt linings can also be glued on. Otherwise, the vibrating compressor will scratch the floor during operation. The degree of vibration, as well as the noise emitted by the device, depends on the chosen model: those installed in imported refrigerators are practically silent, domestic ones are also relatively quiet, however, there are exceptions among them.

The pressure that will create finished device also depends on its model. The older the motor, the higher its power. So, the good old Soviet compressors give out up to 2-2.5 bar, and some up to 3.5 bar.

Maintenance

The filters installed in the compressor need to be replaced frequently. Oil accumulating in the receiver must also be drained. Keep in mind that a key factor that affects the life of a homemade compressor is the regularity of oil changes. It is better to make the first replacement before assembling the device.

There is also a third tube on the motor, it is sealed. It is necessary to cut off its soldered end, turn the motor over and pour out the oil (a glass will be typed somewhere). Using a syringe, pour fresh engine oil into the tube, it should be a little more than what you just drained.

In order not to solder the tube through which you drained (filled) the oil again, simply screw a bolt into it, which can be easily unscrewed at the next oil change.

The compressor can bring a lot of benefits in various areas of life. Perhaps you need a device for quickly inflating car tires, or you decide to do airbrushing, but you don’t have the right equipment, and you don’t want to buy it. You can solve this problem by making a compressor with your own hands. We will talk about how to do this and what is needed for this.

Make or buy

Before you learn how to make a compressor with your own hands, you need to figure out how and what tasks it can solve homemade version, and how to deal with them purchased in the store unit. In this regard, everything depends more and more on the direction for which you need a compressor. If you need it for a simple tire inflation, then you can use a home-made one.

Another thing is if you are drawn to creativity. It does not have to be airbrushing to trip over the disadvantages of the home option. The thing is that painting requires a uniform and uniform air flow. It should be free of debris and other small particles.

If these conditions are not met, it will be possible to get grainy paint or other types of defects as a result. This is what you should think about first of all when you see photos of homemade compressors.

To all of the above, you can add inhomogeneous spots and streaks, which will be a problem even when painting a bicycle frame, to say nothing about car details.

Despite this, both types of compressors are arranged in much the same way, as far as the basics are concerned. In any case, you need a reservoir in which the air is under high pressure. It can be generated by manual injection, or it can appear from mechanical impact.

If the first option is cheaper to implement, then it should be borne in mind that it will be much more difficult to work, because you will constantly need to monitor the pressure level inside the compressor.

In case the compressor is equipped with additional automation, all you need to do is add oil from time to time or change it. The result of the operation of such a device will be a constant and uniform supply of air, which can play a very important role for you.

Preparation

So we come to step-by-step instructions for assembling a compressor at home. If we talk about its advantages, then first of all it is worth remembering the volume of work, because such a unit will work much quieter than the factory version. To do this, it will be necessary to hermetically connect all the components, but this work is worth the effort.

What can you make a compressor with your own hands?

First you need something that can replace the receiver. A simple car camera works well for this. Next, you will need to find a simple pump on which a pressure gauge is installed. It is needed to increase the air pressure inside the chamber. To this we add a simple awl, a wheel repair kit and a simple camera nipple.

First of all, you need to make sure that the chamber is still tight and does not let air through. If it turns out that it does not cope with its tasks, under conditions of increased pressure, the consequences can be serious.

If during the check you find air leaks, then the chamber must be sealed, and this is best done using vulcanization.

Since our camera will act as a receiver, we will need to make another hole in it, for which we need a simple awl. It will need to paste the nipple, which I spoke about earlier. It will be used to bring air into the chamber.

For correct installation the nipple will fit well with the rem kit that is listed in the list necessary details. Then we unscrew the nipple and check how the air moves.

A do-it-yourself mini compressor is made according to the same principle, you just need to take a smaller chamber, for which you need a pump of less power. Such an installation will have lower productivity, but will have a certain compactness.

Peculiarities

After everything that has been done before, you need to install the bleed valve on the nipple that was originally on the chamber. It is necessary to ease the pressure if it rises too high. In order to check the performance of the device not only by direct use, it will not be superfluous to install an additional pressure gauge.

Otherwise, if you are painting, you will need to first make a test run, then look at the uniformity of the enamel or plain paint, and only then start working. This is not very convenient, and can be quite expensive, depending on the price of materials.

It is important to know that when checking the pressure level with a pressure gauge, its arrow should not twitch. If this happens, the whole structure should be checked, as this is a signal that the air flow is not uniform.

In fact, the idea of \u200b\u200bhomemade compressors and the manufacture of one does not require any superpowers. Naturally, you will need direct hands, basic skills in working with different tools, well, and most importantly - the desire to do all this. If you need a compressor for professional needs, then it is better to turn to ready-made solutions.

There are many reviews that homemade compressors work more reliably and at the same time more durable. It is important to understand that it depends primarily on who made this unit, and no less important are the materials that were used to create it.