What to make a powerful compressor. Air compressor: do it yourself from the refrigerator. High power compressor
An air compressor is a device that sprays paint. It is commonly used in workshops and garages for painting cars or inflating wheels. You can purchase such equipment in a specialized store or make it yourself. Unlike factory models, DIY equipment can be more efficient and last much longer. In addition, in terms of financial costs, self-production will be cheaper.
Using an accessory from a car, you can make a compressor of a simple design. This is a finished electrical appliance - wheel inflator... The compressor has two positive properties:
- Power. The device is capable of creating high pressure up to 5-6 atmospheres, without unnecessary load on the engine. This is the main advantage of car devices. But it will take about 10 minutes to pump up the wheels. Therefore, work is done intermittently, otherwise cheap appliances may overheat during this time. The reason is the low performance of automobile compressors.
- Performance. For a unit of time, the device is capable of delivering air quickly and in large quantities. Due to its high performance, the container fills up faster, and the direct use of compressed air increases the flow from the nozzle.
A high-speed engine and a device with a volumetric piston system will help to combine power and performance. To prevent the equipment from stopping during overheating, additional cooling of the cylinders must be created. Sometimes turbines are used for the working unit. In everyday life, the frequent use of simple devices is not resorted to due to their high cost. In order not to choose between power and performance, use a receiver.
The receiver is a storage capacity... For industrial devices, a steel cylinder is used as a receiver. Quite powerful, but not very efficient compressor slowly fills the bottle. In a short period of time, it is possible to supply a volumetric air flow from the receiver, but only when sufficient pressure appears. After supplying air, it must restore pressure. All devices work according to this principle. For a compressor with low power, an electric motor from a toy is suitable. This device is often used to supply air to an aquarium.
Functional homemade compressor
Unlike devices that are made of car accessories, the compressor from the refrigerator runs continuously. This is due to its good power and performance. In addition, in terms of quality, it is not worse than the factory models. And if there is an opportunity to get the component parts for free, then the funds for the manufacture of such a device will take a minimum. The device is designed for painting and blowing, tire fitting, perfectly ensures the operation of pneumatic tools. For the manufacture of a compressor under a voltage of 220 V you will need the following details:
- Motor-compressor from an old refrigerator.
- Tees, oil filling pipe, hoses, fittings, wall inlets.
- A reducer that will monitor the pressure.
- Two pressure gauges.
- Receiver. A fire extinguisher or gas bottlewhich should be completely empty. You can weld a homemade container from sheet iron and a thick pipe.
- Air filter.
- Oil.
- Emergency valve.
- Start relay and pressure switch.
- Metal paint.
- Fum tape, hacksaw and engine oil.
- Key and syringe.
Compressor assembly consists of several stages:
High power compressor
If the previous version of the compressor is not powerful enough for you, then there are devices with more high pressure and high performance... An internal combustion engine is used here as a compressor, the crankshaft of which begins to work not from the combustion of fuel, but from the reverse process. In this case, the piston group of the device has a large margin of safety. An electric motor with a power of 3 kW or more is used as a drive, which can be purchased at a low cost. Or use a working motor by removing the ignition and intake system, exhaust, starter group and gearbox.
This apparatus is capable of creating a pressure of 10 atmospheres. Very noisy.
Medium Power Air Compressor
From a gas cylinder or fire extinguisher a medium power air compressor is created. To do this, connect an old fire extinguisher (balloon) and a powerful autocompressor for pumping the wheels. When making the device yourself, the following rules must be observed:
- A container with mechanical damage and corrosive deposits must not be used.
- The structure must be well fixed.
- Steel lathing is required. This is necessary if the receiver accidentally bursts.
- It is necessary to provide for a pressure reserve. If you plan to increase the pressure to 5 atmospheres, then its strength should be from 10 atmospheres.
- In order for the compressor to automatically shut off when the pressure reaches a maximum, an emergency shutdown sensor is installed. Alternatively, a mechanical valve should be installed, which, if necessary, makes an emergency release of pressure.
- Do not leave the device with high pressure for a long time if it is used in rare cases. To maintain tightness, 0.5 atmospheres is enough.
Do not neglect safety precautions: do not forget about the installation of emergency sensors. An over-pumped wheel will simply burst, and if a steel cylinder explodes, you can get severe injuries.
It's easy to make a compressor yourself... Its design can be simple or complex, the main thing is what it is intended for and how much you are willing to spend on its manufacture. But do not forget that the device must meet technical safety requirements.
The compressor can be used in a wide variety of applications - for tire inflation, airbrushing, painting of spare parts etc. Having the necessary tools and certain technical knowledge, it is quite possible to independently manufacture this unit on the basis of a conventional refrigerator. A homemade compressor gives about 7 atmospheres, which is quite enough for an ordinary garage workshop, so many are increasingly thinking about how to make such a compressor? Do-it-yourself compressor from the refrigerator it will turn out to be quite quiet and, most importantly, cheap at its cost.
On average, the manufacture of this unit will require about one thousand rubles for all components.
Before trying to make ours out of an old refrigerator, you need to compare these two options, i.e. sold in specialty stores and our homemade version. Total can be distinguished a few main differences in between:
- In the design of a factory compressor, there is an electric motor that transmits torque to the working chamber through a belt drive. Concerning homemade compressor, then it consists of a body and the engine itself, without belts.
- The factory version already has automatic pressure relief systems, inlet and outlet filters, pressure meters, etc. In the compressor from the refrigerator, you will have to install the adjustment equipment yourself, taking into account all the features.
- Despite the fact that most of the factory compressors are equipped with automatic systems, this feature is not implemented in some budget models. In other words, these units will have to be turned off on their own, timing the time by the clock. Homemade compressors are mainly equipped with a protective relay that turns off the engine if there is a risk of overheating.
- In some factory models, there may be no lubricant at all. Of course, their service life is small, but there are no various exhaust 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 to pour - synthetics are very poorly combined with ordinary ones, so you do not need to pour everything that is horrible.
- The main feature of a homemade compressor is that it works very quietly, especially if you put all the tubes on it correctly, observing tightness. As for the factory compressors, they are more noisy, so it can only be used outside the home.
- The cost of making 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 not possible to make any technical changes to the factory compressor. In other words, if the unit is not powerful enough, then it can only be used as a pump for, no more. Homemade options good in that you can add some details to them, for example, a large receiver, so you can significantly increase the power of the device.
- A factory compressor is a complete technical device, so any improvisation with it is impossible. With a home-made unit, you can do almost everything - take some parts out of 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: We will study the device and principle of operation of a reciprocating compressor
Most refrigeration compressors have some limitations in terms of their work... There are several modes in total:
- Normal - 16 to 32 C.
- Subnormal - 10 to 32 C.
- Tropical - 18 to 43 C.
- Subtropical - 18 to 38 C.
However, combined modes are more common, having different ranges.
So a homemade compressor can be much more efficient than factory, in terms of work with air.In the video, a version of a homemade compressor for pumping wheels
Dismantling work
To make a homemade compressor from a refrigerator, you need to do some initial preparation. It consists in certain dismantling works, i.e. we just need to remove the compressor from the refrigerator itself. It is located behind the refrigerator, at the bottom of it. To remove it, we need an elementary set of tools: pliers, spanners and two screwdrivers (plus and minus).
On the compressor are located between the tubes that are connected to the cooling system. These pipes must be bitten off with pliers, but never sawed off with a hacksaw. The fact is that with this method, small chips are inevitably formed, which can get inside the compensator.
Then we proceed to removing the starting relay - this is an ordinary black box, with wires sticking out of it. We unscrew the fasteners, then bite off the wires that lead to the plug. We must not forget 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 the fasteners together with the unit itself.
Functional check
After we removed the compressor, it is necessary check its performance.The fact is that we are removing the device from the old refrigerator, so we need to make sure that our unit is still "alive". So, flatten the tubes with pliers - this is necessary so that the air flow passes through them. Next, we need to put the starting relay in the position in which it stood in the refrigerator structure. 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 case, to which you need to screw a piece of wire with a plug. It is better to wrap the junction with electrical tape to eliminate the risk of electric shock. We plug the device into an outlet. If you did everything correctly, then the compressor will work, and air will flow from its pipes. By the way, it is necessary to mark from which tube the air flow comes out, and which one goes.
Step-by-step instruction
Before proceeding with self-productionyou need to make sure you have everything necessary materials and tools.We offer you to watch the video from detailed description process of one of the manufacturing options
Read also: We make a semiautomatic welding machine with our own hands
In addition to the compressor itself, which we previously removed from the refrigerator, we need:
- Receiver. In this case, you can use the body of the old fire extinguisher, or weld the body from sheet metal and pipes.
- Various hoses. At the same time, the length of one hose should be at least 600 mm, and the other two - about 100 mm. In this case, you can take the hoses from the car.
- Various expendable materials - gasoline and diesel filters, wire, clamps, pressure gauge and epoxy.
- The accompanying toolkit, i.e. screwdrivers, pliers, drills, etc.
- In addition, we need a regular wooden board, which will be the basis of the entire structure. We attach the compressor to it using ordinary self-tapping screws. Fastening should be carried out exactly in the same position that it occupied in the design of the refrigerator.
We take any plastic container of a suitable volume (from 3 liters or more). In the upper part, you need to drill a couple of holes for the dimensions of the outlet pipes. We insert the tubes, after which we fill everything with epoxy resin. The inlet tube, into which air enters, must be located so that from its end to the bottom of the receiver it is about 200 mm. The outlet tube should be submerged ten centimeters inward.
This is a description of a plastic receiver, but for greater tightness it is best to make a 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 a pressure gauge can be installed on an iron receiver.
To install it, you need to drill a hole for the nut on the receiver body. We insert it, and then we brew it. Only then we screw the pressure gauge into this nut, after which the work is finished. Now we attach the receiver to our base with a wire. The scheme will be something like this:
There are quite a few photos and videos of his work on the Internet, for example, it is shown how it is used in airbrushing and for painting various parts, so the feasibility of its manufacture is quite obvious. Finally, we need to add a few extra touches to our device.
It is necessary 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 slide onto the fitting. We put the other end of the hose on the inlet of our device. In this case, the filter will protect against dust getting into the case. The second 10 cm hose should be used to connect the inlet of the receiver and the outlet of the compressor. In this case, it is better to tighten the joints with clamps. Our third hose needs to be put on the diesel filter, and the other end should be inserted into the outlet of the receiver. At the same time, the free filter nozzle will later be connected to various equipment for airbrushing, a spray gun for painting, etc.
Another video on the topic
Some technical data and service features
It is rather difficult to say unequivocally what pressure this or that compressor will show. Much depends on the specific brand and the operational life of the device itself. By the way, old units show even better performance than modern ones.
Read also: Huter generator overview
Service of our homemade device - this is a very important point in operation.The main work will be to replace diesel and gasoline filters, as well as to change the oil in the device. Compressors usually have three copper pipes. 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 processing, pouring is done through it.
Does the compressor need to be repaired?
As for the repair of the resulting device, then here everyone decides for himself personally - whether it makes sense to mess with it or not.The repair will consist in ringing the relay, as well as changing the oil in the device. If the performed manipulations did not help, then there is absolutely no need to come up with something else. It is best to throw away the old 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 expediency of its manufacture is difficult to overestimate, because with the help of this device it is possible to carry out various works on airbrushing, inflation of tires, painting various components and other works requiring 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 order 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
A homemade refrigerator compressor is most often used in tandem with an airbrush or spray gun, since it works almost silently, takes up little space and creates sufficient air pressure. It is also suitable for pumping up the wheels of a car. Next, we will tell you how to make a compressor yourself.
Materials and tools for a homemade compressor from the refrigerator
Compressor. The motor from the old refrigerator is called the compressor, it is the central element of our product. How it looks can be seen in the photo: details different models may differ, but are generally similar to each other. The compressor comes with a start relay (black box attached to the side), from which a power cable with a plug comes out.
Receiver. The capacity into which air will be pumped by the compressor. Here options are possible: any tight-fitting container with a volume of 3 to 10 liters made of iron or plastic is suitable. This can be an empty fire extinguisher, small cisterns, various receivers from trucks, cans from construction fluids.
Hoses. You will need three pieces of hose. Two 10 cm long and one 30-70 cm long, depending on the shape of the receiver and the intended mounting. It is convenient to use fuel hoses in a car as they will connect to car filters.
You will also need one hose or tube to connect a ready-made homemade compressor from the refrigerator to the air consumer itself. Here the length, the material depends on the specific needs. If you will be using a compressor with an airbrush, any thin polyvinyl hose (or the one that comes with the airbrush) will do. When using the compressor outdoors, look for a thicker hose.
- Clamps. 5 pieces, size 16 or 20 mm.
- Tubules. Two pieces - copper or iron, with a diameter of 6 mm or others - the main thing is to fit the hoses.
- One is 10 cm long, the second is 20-50, depending on the size of the receiver, more details below.
- Automotive fuel filters. One petrol and one diesel.
- Pressure gauge (optional).
- Epoxy resin if using a plastic receiver.
- A piece wooden board (the foundation). The size depends on the size of the receiver and the motor. They should fit on the board next to each other.
- Steel tape or wire. It is needed to fix the receiver.
- Self-tapping screws for wood.
Tools:
- Sharp knife
- Screwdriver
- Drill
- Pliers.
- Metal file (optional).
How to make a compressor yourself
Now directly on how to make a compressor with your own hands.
Three tubes come out of the compressor from the refrigerator: two open and one short, sealed. Plug the compressor into a power outlet and slide your finger near the tubing outlets. The one from which the air blows will be the exit, and the one that draws in will be the entrance. Remember which one is and unplug the compressor. Use a metal file to cut the two tubes, leaving 10 cm or more for easy connection of the hoses. You can bite off with pliers, but you need to make sure that the sawdust does not get inside the tubes. Next, we fix the compressor on the base board, screwing the legs with self-tapping screws (you can use bolts, this is more reliable). Important: we fix the compressor in the same position in which it was fixed in the refrigerator. The fact is that the starting relay on the motor works due to the forces of gravity, there is an arrow on the relay case pointing up. Having secured the compressor, go to the receiver.
Making a receiver. Option if you have a plastic container. We drill two holes in the lid for our tubes. We insert them there, as shown in the figure, and fasten them with epoxy. Leave the ends 2-4 cm long on top.Now about the length of the tubes. Short (10 cm) will be the day off. The second will be the entrance, we make it as large as possible so that it does not reach a few centimeters to the bottom of the receiver. This is done in order to space the inlet and outlet openings inside the receiver as much as possible for greater air mixing.
If you have an iron receiver, we do the same, but do not glue the tubes, but solder or weld on. You can also weld the nuts, and then screw the fittings under the hoses into them.
The pressure gauge can only be installed in a metal receiver. For this we drill in any convenient location there is a hole on the receiver and we solder a pressure gauge in it. A more preferable option: weld a nut onto the hole and screw the pressure gauge into the nut. So in case of failure of the pressure gauge, you can easily replace it.
Now we take a piece of hose (10 cm) and put it on the gasoline filter. If you use hoses for gasoline, then there should be no problems, if you use polyvinyl pipes, then you may have to heat it with a match or hold it in boiling water so that it fits on the filter fitting. We put the other end of the hose on the compressor inlet tube. This inlet filter is needed to filter out dust. Here, the use of clamps is not necessary on the connections, since there is no pressure here.
We take the second piece of hose and connect the outlet tube on the compressor with the inlet tube on the receiver. We put clamps at the joints.
Now we put the third piece of hose (10 cm) with one end on the outlet tube of the receiver, and put the other end on the diesel filter. We put on the clamps. An arrow is drawn on the filters (diesel and petrol) indicating the correct direction of travel through the air filter. Connect both filters correctly. A diesel outlet filter is needed to filter water from the air.
On the outgoing fitting of the diesel filter we put on our working hose going directly to the airbrush, spray bottle, etc.
We fasten rubber feet on the underside of the base board or glue felt pads for furniture. If this is not done, the compressor may scratch the floor during operation - it vibrates. Vibration and noise levels depend on the model of the refrigerator compressor you purchased. Motors from imported refrigerators are almost inaudible, Soviet ones are also quiet, but there are exceptions.
The pressure generated also depends on the model. Ancient motors are more powerful. Most Soviet compressors are capable of pumping pressures up to 2-2.5 bar. The compressor in the photo generates a pressure of 3.5 bar.
Servicing a homemade compressor from the refrigerator
Compressor maintenance consists of regularly changing both filters and draining any accumulated oil in the receiver. But the main factor affecting compressor life is the frequency of oil changes. The first time it is better to change it before assembling the compressor. The motor has a third sealed tube. Cut off the sealed end from it and drain the oil from it by turning the motor over. Pour out about a glass of oil. Now we pour fresh engine oil with a syringe through the same tube, a little more than the amount that was drained.
Then, in order not to seal the drain tube, we twist a bolt into it suitable size... At the next oil change, simply unscrew the bolt.
The compressor is used for self-service of the car, including painting, tire inflation, air supply to pneumatic tools and others renovation works... Make a compressor for painting a car - economically profitable solution, which does not require significant financial investments.
Principle of operation
Based on the principle of functioning, there are different types equipment, but the basis is one technology - the air supplied due to the operation of the engine is transferred to the tank and, accumulating, reaches an increased level of the pressure indicator. As soon as the pressure reaches a critical level, excess air is removed using a bleed valve. Thus, the compressors work by maintaining the pressure at a certain level.
The most important condition is a constant pressure level in the compressors used to paint the car. However, regardless of the functionality of the tool, this parameter is key, and therefore the manufacturing technology and materials used are selected depending on the required pressure. On the Internet, you can find many different videos of assembling any compressor, however, the most popular options are very few.
We collect quickly and easily
One of the most available options A compressor for painting works is a tool made from a car tube on wheels. It is she who acts as a receiver. You also need to have the following materials and tools:
- The nipple of another car camera.
- Pump for a car with a pressure gauge.
- Consumables for working with rubber.
- A set of automotive tools.
The chamber must be intact, since the main function of the receiver is the accumulation of air. As a supercharger in the device it performs car pump... We assemble the compressor with careful observance of all the necessary steps.
First of all, you need to make a hole in the chamber and glue the nipple to this place. Thus, the "native" nipple will serve to pump air into the chamber, and the new one - to supply air to the atomizer. Next, you need to adjust the pressure with a monometer, choosing the optimal indicator in the process.
To simplify the work for the manufacture of a compressor for painting a car, you must follow the following recommendations:
- To prevent vibrations during air supply, the camera must be carefully secured.
- Do not fill the chamber with loose substances, as this leads to clogging of the channels, which means that the paint mixes with them.
Compressor with receiver
This option is much more complex in design than the previous one. Such a tool is already semi-professional, which means that in order to assemble a compressor, you need a larger number of tools and material. An important element of such equipment is a do-it-yourself compressor from the refrigerator. It should be borne in mind that the compressor of an old refrigerator may lose its sealing, which means that its functionality is reduced. In such cases, care must be taken to change the oil. This procedure is performed as follows:
- File and break off the tube on the side of the compressor.
- Pour the oil inside using a syringe.
- Seal the tube with a screw with a rubber gasket.
In order to compensate for the abundant evaporation of oil, it is necessary to install a filter for an oil and moisture separator at the inlet to the receiver, which will prevent third-party liquids from entering the paint.
After that, you need to drill a hole for the adapter and install it using, for example, cold welding. The outlet is equipped with a car air filter to prevent dirt and liquids from entering.
Once the pre-assembly is complete, you can assemble the compressor:
- Fasteners are screwed onto the separator filter and installed on one side of the reinforced oil-resistant hose, and on the other side on the compressor tube.
- All connections are clamped with clamps, and the threads are sealed with fum tape.
- The cast iron lid is screwed on with a rubber gasket backing.
- Install a toggle switch, pressure switch, reducer, pressure gauge and connect all the wires.
At the end of the assembly, the compressor must be set up and tested. It is certainly more difficult to make such a tool yourself, but its functionality is much more extensive. For ease of use, furniture wheels can be installed on the compressor.
Most common faults
- The receiver does not maintain the set pressure level when the power is turned off. This is possible if there is a leak in the system and it can be detected with the help of a soap solution to the following most vulnerable points:
- highway;
- piston valve;
- pressure relief valve on the receiver.
If a leak is detected on the compressed air line, this malfunction can be eliminated with simple electrical tape and sealant. If there is a malfunction on the tap, then the valve must be replaced.
- The engine does not react to starting. First of all, you need to make sure that the power source is in good working order and the integrity of the cable, as well as evaluate the quality of the contact connections and fuses. Incorrect receiver pressure settings can also affect instrument performance. To diagnose this malfunction, it is necessary to bleed the air from the tank and try to start the engine.
- No pumping. The first cause of such damage may be damage to the power grid. It is also possible that the pressure in the receiver is too high.
- Compressor overheating. This situation is possible with increased temperature conditions and with a drop in voltage in the network, as well as with prolonged operation of the tool.
- At the outlet, the air contains water. As a rule, the reasons for this phenomenon are as follows:
- The collected water in the receiver has reached a critical level
- filter contamination at the inlet:
- increased level of humidity in the room.
Certainly self assembly compressor is a complex and time-consuming process, but the benefits are undeniable. It should be noted that both maintenance such a tool is much simpler and cheaper. Painting a car with your own hands using such a compressor will also be significantly cheaper than in any car repair shop. A compressor for painting with your own hands for a car - will last a long time if properly assembled and used.
To make a compressor yourself, you will need a refrigerator, more precisely, just one of its parts. Such a device is often used together with a spray gun or airbrush.
He practically does not make noise during his work, has small sizewhile creating quite strong pressure. Such a unit is also suitable for inflating car wheels.
What do 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 the power cable with the plug comes from.
2. The capacity 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 receiver from a truck, a small cistern, or a can of construction fluids.
receiver
3. To make a 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 connect to their own “native” filters.
4. Another hose or tube is needed to connect the compressor to the air consumer. The material of the product, like its length, is determined by specific needs. If you plan to use the compressor with an airbrush, a thin polyvinyl hose will do. The one that comes with the airbrush can also be used. If you plan to use the compressor outdoors, it is best 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 the hoses fit on them). The length of the first tube is 10 cm, the second is 20-50 cm;
One filter each from the car (diesel and fuel);
Epoxy resin, soldering iron, welding machine;
Pressure gauge (optional);
Base for the receiver and motor (a board made of wood of the appropriate size is suitable);
Steel tape;
Self-tapping screws;
The next set of tools: screwdriver, drill, pliers, knife, metal file.
Making a compressor from the refrigerator
At the compressor outlet there are three tubes: a sealed one (the one that is shorter) and the other two are open. It is necessary to figure out which one is the entrance and which is the exit. To do this, slide your finger over the inlets of the tubes, having previously connected 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.
Using a metal saw, cut off a couple of tubes, leaving at least 10 cm for easy connection of the hoses. Alternatively, you can try biting off the desired portion of the tubules with pliers. Most importantly, make sure that no sawdust gets inside.
Now the compressor needs to be fixed on a wooden base by screwing its legs with self-tapping screws. For a more secure fixing, 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 the 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 the tubes and insert them there. Secure the tubes using epoxy resin... Leave 2-4 cm of tubing outside (top of the lid). Use a 10 cm outlet tube.
The second one should be much longer and practically reach the bottom of the receiver. It is necessary to move the inlet and outlet as far as possible from each other - this will ensure the best air mixing in the receiver itself.
For a metal receiver, you need to do the same, with the only difference that the tubes need to be soldered or welded. The nuts can also be welded, then it is necessary to screw in the hose fittings into them.
The pressure gauge is installed only in the iron receiver.
Just drill a hole in it and solder (weld) 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, you can easily change it to a new one.
Now you need to fix the receiver to the wooden base. Attach with steel tape 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. There will be no difficulties with the appropriate hoses (for the gasoline filter), but the polyvinyl pipes may have to be heated to fit the filter. This can be done with a lighted match or by keeping them in boiling water for a while. Slide the other end of the hose onto the compressor inlet tube. An inlet filter is required to filter the dust. In this case, it is not necessary to use clamps on the connections: there is no pressure here at all.
Another length of hose is required to connect the compressor “inlet” to the receiver “outlet”. Clamps must be placed on their connections.
We put one end of a 10-centimeter piece of hose on the receiver outlet tube, the other on the diesel filter. Each of the filters has an arrow indicating the direction in which air flows through them, so there will be no difficulties with their correct connection. A 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 of the diesel filter.
Bottom on wooden base it is necessary to screw on the rubber feet. Alternatively, you can also glue felt pads. 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 selected model: those installed in imported refrigerators are practically silent, domestic ones are also relatively quiet, however, there are exceptions among them.
The pressure that the finished device will create 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
Filters installed in the compressor need to be replaced frequently. The oil accumulating in the receiver must also be drained. Keep in mind that the key factor that affects the life of a homemade compressor is the frequency of oil changes. The first replacement is best done before assembling the device.
There is a third tube on the motor, it is sealed. It is necessary to cut off its sealed end, turn the motor over and pour out the oil (there will be a glass somewhere). Using a syringe, pour fresh engine oil into the tube, it should be a little more than you just drained.
In order not to re-seal the pipe through which you poured (poured) oil, just screw a bolt into it, which can be easily unscrewed at the next oil change.
