Assembling a compressor yourself is not as complicated as it seems at first glance, especially if you know the principle of its operation. To assemble the compressor, you will need a motor that drives air into a container where the same air will be under pressure. The mechanism is designed in such a way that excess air, due to which the pressure in the container may exceed what is necessary, comes out through a special drain valve. This is necessary so that during the process of painting a car (or whatever else is needed) the paint spreads evenly over the entire surface, and this effect can only be achieved when there is constant pressure in the sprayer.
The compressor can be used in a variety of areas - for inflating tires, airbrushing, painting spare parts, and so on. Having the necessary tools and certain knowledge, it is quite possible to independently manufacture this unit based on a conventional refrigerator. A homemade compressor produces about 7 atmospheres, which is enough for an ordinary garage workshop. A refrigerator compressor will be quite quiet and, most importantly, cheap in cost.
What is better - homemade or purchased?
In total, there are 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.
- Despite the fact that most factory compressors are equipped with 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, they are small, but they lack various exhausts. 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 oil.
- The main feature of a 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 the main components are taken from old equipment, and the control equipment will cost a maximum of 1000 rubles.
- It is impossible 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 tire inflator, nothing more. Homemade options are good because you can add some parts to them, for example, a large receiver, thanks to which you can significantly increase the power of the device.
As practice shows, a homemade compressor for painting a car breaks down much less often than its foreign and domestic factory counterparts. On the Internet you can find many instructions on how to build compressors with your own hands. So let's discuss several options that can help in this matter.
Schemes for making a homemade compressor
Here are several options for device assembly schemes - choose which one is best suited for your purposes:
Compressor assembly parts
- pressure switch;
- pressure gauge;
- gearbox with oil and water separator;
- oil/water separator filter;
- adapters;
- crosspiece;
- fitting and nut;
- coupling;
- nipple;
- a tube;
- car clamps;
- receiver;
- nuts, studs, washers;
- furniture wheels;
- automobile oil;
- toggle switch;
- plug and cord;
- fuel filter;
- plywood panels (chipboard);
- refrigerator compressor;
- oil and petrol resistant hose, screws, Epoxylin, sealant, paint, fum tape, rust remover and other small things.
I checked several different control valves in my versions. After several attempts, I ordered a RUCK14IAMSV check valve, it does not buzz and can be perfect for building a compressor from refrigeration units. You also need to buy a safety valve (MINI SVM14-12). Take a tank from a 16 kg powder fire extinguisher. The pressure in the tank is 9.5 bar, the shelf life is 2 months.
Important: pay attention to what kind of oil you pour in - synthetic oil does not combine very well with regular oil, so you don’t need to pour in just anything.
- An oil separator must be installed between the compressor and the tank.
- Oil should be added through the third solder tube.
- It is best to solder the connector and screw it in with a screw or metal plug.
- Install a dehydrator, it will also capture the oil.
Due to the sudden failure of the refrigerator, I became the owner of an efficient 110 W unit. Of course it can be converted into a compressor. There is a car airbrush, which was previously used with a 12-watt compressor, as well as with a high-power compressor. These devices are noisy and short-lived. So I had to make a homemade one.
Semi-professional air blower
Experts have repeatedly commented that homemade compressor units have a longer service life. Moreover, comparisons were made with domestic and foreign models.
This is natural, because the installation is made with your own hands. Therefore, we will consider the option of how to make a compressor from a refrigerator that will not be inferior even to products from famous companies. So, for its manufacture you need the following list of materials:
- Receiver for compressor;
- Pressure gauge;
- Relay for monitoring pressure in the compressor;
- Threaded adapters;
- Fuel filter (gasoline);
- Gearbox with oil and water separating filter;
- Plumbing cross with ¾ inch thread;
- Motor for compressor unit;
- Automotive clamps;
- Motor oil (10W40);
- Switch (220 V);
- Oil resistant hose;
- Brass tubes;
- Regular syringe;
- Thick board;
- Compressor rust converter;
- Power system filter (diesel);
- Metal paint;
- Nuts, washers, studs;
- Wheels for furniture;
- Sealant, fum tape;
- Needle file.
Compressor assembly instructions
It is important to dismantle the compressor correctly to avoid damaging it. First, using wire cutters, cut through the tubes coming out of the engine leading to the radiator grille. Next, the wires from the relay are cut, but their length should remain approximately 20 cm. Before unscrewing the compressor, you need to make a mark on the relay cover.
Once the compressor blower circuit from the refrigerator is broken, the spindle will be exposed to the atmosphere, which will lead to a loss of its properties. If the factory oil in the supercharger is not replaced, its pistons will quickly wear out, causing the engine to fail. Therefore, it is recommended to first replace it with a semi-synthetic motor one. like from a car.
In addition to the outlet and inlet tubes, the compressor from a conventional refrigerator is equipped with a third tube with a sealed end. In order to use it in the future to paint a car, it is necessary to remove the clogged part. To do this, using a hacksaw for metal, you should make a neat cut around the tube, but without sawing all the way through, and then break off the cut piece. It is important that metal shavings do not get inside.
The remaining pipe must be flared and the old oil drained, then semi-synthetic oil must be poured into it in the same quantity. After which the pipe is sealed with a screw wrapped in fum tape.
The fire extinguisher housing is perfect for the receiver. It is important that it is cast, seamless and has a volume of 10 liters or more. Before using it, you need to inspect the inside of the fire extinguisher for corrosion. A flashlight is used for inspection. If corrosion is still present, it must be removed using a special liquid.
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Comments 62
cool guys broke up over an old piece of hardware
The same ring is on the rear gearbox of the Rav4. What if someone has it lying around?
The compressor is 24V, can it be converted to 12V, I ask for help from those who know
A very good thing! You drop a bolt or nut in the garage and look for it, but you don’t have to climb with this thing, just turn on the magnet and collect all the nuts, bolts, washers and other small things from the floor. Respect!
You stupidly take a big magnet, put it in a plastic bag and drive it around. Then you turn the bag inside out, the magnet is outside, all the garbage is inside. You don't even need to turn anything on.
I agree, this helper also needs to be supplied with 12 volts, which is not always convenient.
The couple can’t believe that, my friend, you asked for a hundred rubles for your living things. If the price was ok, you could buy it.
Thank you, I'm laughing, they're 300 rubles each at the drome and farpost. They lie there, no one needs them, then they hang in the archives for half a year, their own ones cost more than non-ferrous metal. Do you want to sell Lagrit heads at a “standard price”? Or is he just smart in words?
