What can you do with a refrigerator motor?

Where can I sell a non-working refrigerator?

The best solution would be to hand over a non-working refrigerator.

to a special service for the removal and disposal of large waste. Such organizations may be: State. The recycling company removes equipment in any condition.

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Do-it-yourself refrigerator compressor - manufacturing features

Often an old, unused refrigerator still has a fully functional compressor. It can be slightly modernized to result in a full-fledged installation suitable for use for various purposes - most often they are used for painting, inflating car tires, performing airbrushing or powering pneumatic devices. Let's look at how to make a compressor with your own hands from an old refrigerator.

Parts and tools needed to make a compressor

To make a refrigerator compressor with your own hands, you will need the following tools:

Welding machine (inverter).
Electric drill, screwdriver.
Drill, engraving mini-drill with a set of cutters.
A brush with metal bristles to remove rust.
Rolling for copper tubes.
Pliers, a set of wrenches, an adjustable wrench.

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From the materials you need to prepare:

11 kg propane cylinder.
Pressure regulation device.
Steel plates 2–3 mm thick and 3–4 cm wide.
Two supports on wheels.
1/4 inch adapter.
Blind half-inch coupling with internal thread.
Check valve and connector for it.
Two half-inch copper couplings for a copper pipe.
Clamping bolts, nuts, other fasteners, fum tape.

During the work process, it may be necessary to use other tools or materials. So, instead of a propane cylinder, a fire extinguisher housing or a ready-made car receiver can be used. Some craftsmen suggest installing plastic containers, which should be avoided, since compressors from refrigerators can create high pressure that can rupture such a receiver.

Professional and homemade compressors: 10 differences

Buying a pneumatic tool is cheaper (the difference is up to an order of magnitude). We consider the extensive possibilities of use to be an additional advantage. Think about it. There is a rebar in the middle of the field. Will you make cuts with an electric tool? Imagine dry forest trees. Bears do not know electric generators, but a pneumatic saw will do the job (on par with a gasoline one).

We recommend that you start reading the review from the end. 10 differences that characterize a refrigerator motor-compressor cannot be understood without knowing the operating principles.

A professional compressor uses an ordinary asynchronous electric motor, through a belt drive or directly transmitting the torque to the working chamber with a freon pumping mechanism. More often, the actuator is an ordinary piston. The refrigeration compressor is assembled in one housing with the engine and without belts.
A factory professional compressor for technical needs is equipped with the correct set of automation and units: emergency pressure relief valve, pressure meter-switch, inlet filter, outlet filter, pressure gauges, receiver (steel cylinder). The refrigeration compressor will have to be installed by independently calculating the options and selecting control equipment.

The factory compressor often operates automatically. The simplest models constantly have to be turned off using a timer. Time is recorded manually on a watch. Refrigeration compressors are equipped with protective relays (in addition to starting ones). The engine turns off when the sensitive element overheats and will not burn out.
Lubrication of a factory compressor is a separate problem. The industry even produces dry models of pistons equipped with graphite rings. The engine life is less, as is the cost. But there is no need to lubricate, the air will be clean. This is important for those using capricious spray guns that do not tolerate impurities when inflating tires in the garage (pneumatic tools, on the contrary, love oil and require installation of lubricator nipples on the hose). Refrigeration compressors are bathed in oil, just like air conditioning compressors. They float in the bathtub, you can drill holes on the body to fill in grease and other suitable substances, or use a service pipe. Synthetic oil is an antagonist to natural oil; beware of thoughtlessly pouring arbitrary components inside.
The refrigeration compressor is manufactured to meet the standards for the production of household appliances and operates silently. If all the tubes are sealed, the condition will be maintained. None of the neighbors of the garage cooperative will hear that the humble servant of the board has decided to pump up the tires. A factory compressor for technical purposes behaves more pretentiously, because the requirements are different.

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A refrigeration compressor is purchased cheaply; we remove the unit from old household appliances. You will have to purchase additional control valves; the price is within one thousand rubles. A factory compressor station is purchased in a store according to the general conditions. For comparison, an Airline Classic-2 CA-030-02 automobile pump with a capacity of 30 liters per minute and a working pressure of 7 atm costs 1,400 rubles; it is not equipped with a receiver (more precisely, a small cylinder), therefore it is of little use for a whole that exceeds the volume of work on inflating wheels.
Using a refrigeration compressor as a basis, build a station according to your needs. It is not possible to configure a purchased unit. If productivity is low, the bicycle wheels will be left to pump. Equip your homemade compressor with a large receiver. Having pumped 8 atm inside, using most pneumatic equipment (screwdrivers, drills, saws) will be a joy. A tangible plus.
The layout of the compressor station is predetermined. The author's gentleman's device is free to place according to your spiritual needs. Some enclose the assembly parts inside a hangar-shaped case, which was previously equipped with sewing machines, and provide the structure with a handle, simplifying manual transportation.
The refrigerator compressor housing is made black, it transfers heat better; craftsmen cut off the upper part of the casing, enhancing cooling. We recommend instead installing a fan that blows air around the outside of the device.

The refrigeration compressor comes in the UHL design, therefore, it is constrained by certain operating conditions restrictions. Temperature limit above 10 ºС. Here are the approximate values of climatic versions:

N (normal) – 16-32 ºС.
SN (subnormal) – 10-32 ºС.
T (tropical) – 18-43 ºС.
ST (subtropical) – 18-38 ºС.

Much more common are combined classes, designated by a dash, which include both ranges by addition: 16-38 ºС. These differences are not the only ones; the authors tried to make it clear: a homemade station made from a refrigeration compressor will sometimes give a 100-point head start over a purchased one, although the device is not intended to work with the atmosphere. During normal operation, oil, water, and air get inside. The refrigeration compressor will faint when it sees oxygen diluted with nitrogen inside the casing.

The operating pressure of refrigerators reaches 25 atm (depending on the model), sufficient for domestic needs. The main thing is to stock up on more receivers. Beware of the explosion. Most equipment deliberately uses low pressure for safety reasons.

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.

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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.

Look what came out of a compressor from an old refrigerator

The compressor from the refrigerator can be used to pump out water and oil. But besides this, you can make interesting homemade products from it. Today we’ll tell you what else it can be used for. We hope our article will be very useful to you and you can do the same. To give the compressor a second life and not waste money on purchasing things that may be useful on the farm.

From a compressor you can make an electric jigsaw, which many people need at home. First, I drilled the piston and tapped it. But I was very surprised that the wall of the piston is too small to cut a thread. Therefore, I had to disassemble it, which turned out to be not so easy. I connected the workpiece and the piston by welding. I started to try it on, the piston does not cling anywhere and does not dangle.

I made the bed from a channel, drew a line and cut it with a grinder. I cut off the extra parts. From a 25 mm corner I cut two pieces, each 140 mm long, attached a plate to them that secures the winding, and applied markings to the corner. I trimmed off the excess and drilled a hole. I cut threads into the blanks to make assembly easier.

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I screwed the resulting blanks to the motor windings and began final assembly. I installed the rotor with the crank and tightened it tightly. I installed the piston so that the pin fits into the connecting rod. The work turned out to be jewelry.

The engine was installed in the center of the channel and welded. I made a lever from a profile of 40 x 20 mm and 20 x 20 mm. I made holes and screwed on the bolt and nut. It turns out something like this.

I cut pieces of 200 mm each from the profile; they will serve for the table. I welded everything together in the form of a square and welded everything to the channel. Protected the engine using a regular 5 liter plastic bottle. It turned out quite well. I screwed a table on top that I had prepared in advance.

I think comments here are unnecessary, see for yourself what this baby is capable of. It cuts 4mm, 10mm plywood, 4mm plastic, 28mm pine, 10mm plastic. This is how the unique machine turned out.

Checking the operation of a homemade compressor

After connecting all the parts and connecting the power wires, a test run is performed and the operating mode is adjusted. The compressor is connected to the network, and using the adjusting assembly, the mode of turning the device on/off is adjusted when a certain pressure is reached.

It is not recommended to immediately set high values, since a leak in the welded joint on one of the fittings may be detected. Defects found must be eliminated, for which the device is disconnected from the network, the pressure accumulated during the test run is released, and the detected defects are eliminated. After this, the device is reconnected to the network and put into operation.

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Airbrush

This type of art involves the use of a device with which the drawing will be applied. To assemble the unit use:

compressor;
filters for cleaning;
furniture screws;
rubber tube;
clamps for fasteners;
PVC tube.

Before starting assembly, change the oil in the unit by adding car oil.
Connect the receiver.
Connect the start relay and charging tube.
Attach the gasoline filter to the compressor, and the diesel filter to the receiver.
Connect everything with pipes.

Home craftsmen with certain skills in working with equipment can easily find various uses for an old refrigerator component.

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