Connecting the refrigerator compressor to a new device

So, is it time to dump your old broken refrigerator in a landfill? Even if it is already beyond repair( for example, due to freon leakage), there are still valuable working units and spare parts that need to be removed! First of all it concerns the refrigerator compressor. It is useful again and again for pumping air, for example, in the wheels or for the manufacture of homemade paint apparatus - airbrush. To remove the compressor from the refrigerator, you have to unscrew only 4 nuts and cut with a hacksaw just 2 tubes - the inlet and outlet. The third tube( freon) is jammed tightly. Copper tube in the vicinity of the unit, you can just eat pliers, and not saw off. Of course, before you start dismantling, you need to disconnect the refrigerator from the outlet!

The next step is to check the removed unit for operability. To do this, it must be connected to the electrical network. If the compressor is working, a hissing sound is clearly audible - the air is sucked into one tube and thrown into another. Remove the unit from the old refrigerator should be as careful as possible so that the oil in it remains safe and sound. It is necessary to cut the cable going to the temperature sensor, then measure the resistance and examine the location of the closed contacts to be used during the further assembly, very well, if the circuit diagram of the old refrigerator is preserved.

Preparatory work

After determining the output tube from the compressor, it is better to mark it immediately, because an oil filter should be attached to it. In order for the used compressor in the new device not to overheat and not fail prematurely, it is better to install a new relay for it, ideally, if the relay is original, corresponding to the brand of the old refrigerator. To properly connect the relay, you need to study the scheme of the refrigerator and make the connection in exactly the same order that was in the refrigerator and which shows the scheme. If the refrigerator documents have not been preserved, a schematic diagram can be found on the Internet.

Also, a new device will have to be equipped with a receiver, which can be bought in a store or made by yourself. Even for the assembly will need a plastic bottle, through the holes in the cap which will pass the inlet and outlet tubes. After inserting the tubes, the bottle should be poured with epoxy resin, and the bottle should be covered down before the resin hardens. After the resin solidifies, the tubes and the cap will be tightly inserted into the bottle.

To connect the air pumping unit to some device, you will need windshield washer hoses, which, like the relay, can be bought at any auto shop. During operation of the device, you should carefully observe the oil level, which prevents overheating. It should also be remembered that the compressor from the old refrigerator should not work longer than 45 minutes.

How to check the wiring and connect the compressor from the old refrigerator without relays and circuits?

Many people are interested in connecting the compressor without a relay, and here there are some essential nuances, information about which is rather difficult to find. Here it is not so much the scheme as the principle. First you need to ring the general conclusion, which is alone, to the left of the other two. Putting the terminal to the common terminal, you need to find the working winding with the second terminal. For example, one output shows 14 OHM, and the second shows 37.9 OM.Which of these windings is working? Many people mistakenly claim that the working winding is one that shows greater resistance. But this is fundamentally wrong.

Important:

Working is the winding, which shows less resistance! And the one that shows more resistance, is the starting( start)!If you mix them up and connect the compressor incorrectly, it will quickly overheat and will not last long. Therefore, in this case, we need accuracy!

This is the rule that works for refrigeration compressors, and this should not be forgotten. The next mandatory preparatory stage before connecting is to check whether some of the windings penetrates the case. Otherwise it may happen that you touch the body of the working device, and you are struck by the current. And this is not excluded, because the compressor is not new. To test, you need to touch the winding output with the left terminal, and with the right one - anywhere in the housing, just test the second and the third output. Only if the device has shown that all three outputs are reliable and do not penetrate, can such a compressor be connected to the working device.

The next step is to connect the compressor from the old refrigeration equipment to voltage with the help of terminal blocks. First - on the common wire and on the worker. And the starting voltage will be applied by briefly touching the exposed wire. But this should be done carefully and carefully so as not to get an electric shock. When voltage is applied, the compressor starts to buzz, and when we touch the starting output, it will turn on and start blowing air. The optimum time of work is 10-15 minutes, during this time some heating of the body of the unit is allowed, up to 50 degrees, but it is impossible to allow more.

If the wiring is OK, change the oil!

Of course, you can leave the old oil, but is it worth it to spend so much effort to connect the old compressor to the new device for only a few sessions? Most likely, inside there is a long-standing waste oil, which contains metal particles and poorly protects the unit from overheating. It is best to completely drain the old oil and add new engine oil. Where to fill it is not a question. As a rule, a large bolt is clearly visible on the compressor housing, which must be unscrewed with a wrench. Through the open hole and made to drain the old and pour new oil.

How to extend the life of the compressor?

Preventing overheating and premature compressor failure - this is a sufficient amount of oil, proper connection to electrical outlets and limited work time. It is not bad to connect a capacitor between the common and starting outputs, especially if it was in the refrigerator. This simple device increases the efficiency of the engine and prolongs its service life.