Owners of old household appliances often wonder what value their unit represents when scrapped. When a refrigerator completely breaks down and cannot be repaired, the most reasonable solution is to disassemble it to obtain non-ferrous metals. Copper is one of the most expensive metals at the collection point, and it is what makes up the bulk of the profit when handing over old equipment.
However, the amount of this valuable resource in different models can vary significantly. Soviet models of equipment produced in the 70-80s contained significantly more metal than modern lightweight counterparts. Understanding the design and knowing exactly where to look non-ferrous metalwill allow you not only to earn more, but also to avoid mistakes when dismantling dangerous elements.
In this article we will analyze in detail how many kilograms of copper can be obtained from one unit, how to properly remove the compressor and what affects the final cost of scrap. You will learn about the technical features of old motors and understand whether the game is worth the candle, given the cost of time and effort.
Where exactly is copper located in the refrigerator design
The main source of valuable metal in any refrigeration unit is the compressor. It is in this node that up to 90% of all copper available for extraction is concentrated. Sealed casing The motor hides inside the electric motor windings, made of pure non-ferrous metal. Older models, such as the famous ZIL or Saratov, used thick wire, which made them especially valuable for processors.
In addition to the engine itself, copper tubes are present in the heat exchange circuit. However, there is an important nuance here: in most cases, the evaporator and condenser tubes are made of aluminum or copper-plated steel. Pure copper in tubes is less common and is usually located only at the connection to the compressor or in the condenser of older models. Heat exchanger may be all aluminum, which reduces its value.
⚠️ Attention: When trying to determine the material of the tubes visually, remember that copper-plated steel looks almost like pure copper. You can check the material with a magnet - copper and aluminum are not magnetic, unlike steel.
Also, a small amount of metal can be found in the electrical wiring going to the thermostat and start relay. Although the weight of these elements is small, they also count towards mass processing of dozens of pieces of equipment. For single analysis, it is of interest motor-compressor, since removing the wire from small parts often does not repay the time spent.
Factors influencing the amount of metal recovered
The weight of copper directly depends on the year of manufacture and the manufacturer of the refrigeration equipment. In the Soviet era, they did not save on resources, so the windings were made with a large margin of safety and using clean material. Modern manufacturers strive to reduce weight and cost, replacing copper with aluminum where technology allows.
The key factors determining scrap yield are:
- 🏭 Year of production: The older the equipment (especially before 1990), the more copper it contains.
- ⚖️ Compressor power: Dual-compressor models contain double the volume of non-ferrous metal compared to single-compressor ones.
- ❄️ Refrigerant type: Units running on freon often have heavier copper connections than modern systems.
It is important to take into account the condition of the compressor itself. If the unit has been corroded or has been flooded with oil for decades, the weight may be distorted, but the amount of metal itself inside the windings will remain the same. Sealed unit Protects the insides from the external environment, so even a motor that is rusty on the outside can contain pristine copper inside.
There is also a dependence on the brand. European and Japanese models often had more complex winding designs, while compromise solutions could be used in the mass market. However, for older models this difference is not as critical as for modern technology, where aluminum has replaced copper almost completely.
Weight table copper in compressors of different models
For accurate profit planning, it is necessary to rely on verified data. The weight of copper in a refrigerator compressor varies depending on the volume of the chamber and the type of motor. Below is a table showing the average yield of pure metal from various types of units.
| Refrigerator type / Model | Compressor weight (kg) | Approximate copper yield (kg) | Percentage content |
|---|---|---|---|
| Soviet (ZIL, Saratov) | 10–12 | 1.5 – 2.0 | ~15-18% |
| Imported old (90s) | 8–10 | 1.0 – 1.5 | ~12-15% |
| Modern (after 2000) | 6–8 | 0.5 – 0.9 | ~8-10% |
| Inverter compressor | 5–7 | 0.3 – 0.6 | ~5-8% |
As can be seen from the table, old Soviet models are real "treasures" for scrap collectors. One such unit can produce up to two kilograms of pure metal, which at current scrap prices is a significant amount. Modern inverter systems are much poorer in the content of precious metals and non-ferrous alloys.
It is worth noting that these figures are averaged. The actual yield depends on the specific modification of the engine and the year of its production. On average, from one old compressor weighing 10 kg it is possible to extract about 1.2–1.5 kg of pure copper grade M1 or M2. The rest of the mass is made up of housing steel, oil and aluminum.
Why is there less in modern refrigerators? copper?
Modern technologies allow the use of thinner wire and efficient alloys. In addition, manufacturers strive to reduce the weight of the device for ease of transportation and reduce the cost of materials.
Technology for safe removal of the compressor
The process of metal mining begins with dismantling the compressor. This is an important stage that requires compliance with safety precautions and the availability of a certain set of tools. You will need a grinder with a metal disc, pliers, a hammer and safety glasses.
First, you need to disconnect the unit from the power supply and let it stand for several hours so that the remaining refrigerant and oil drain into the lower part. Then the copper tubes suitable for the motor housing are carefully cut or sawed. It is important not to damage them too much if you plan to sell them separately as copper shavings or tubes.
The compressor itself is attached to the frame of the refrigerator on four shock-absorbing legs. They need to be cut with a grinder or beaten with a hammer. After this, the heavy unit is removed from the niche. The next step is opening the sealed casing. This is done by sawing a circular seam around the perimeter of the housing.
⚠️ Attention: There is technical oil inside the compressor. When opening the casing, it may spill out, so carry out the work outside or cover the floor with rags. The oil is toxic and requires proper disposal.
After removing the cover, you will have access to stator —the main part of the electric motor. It is this that needs to be removed from the case. Often the stator is held tightly and has to be knocked out. The windings on the stator can be burned (which degrades the quality of the copper) or carefully cut off with wire cutters. The second option is preferable for obtaining high-quality metal.
☑️ Tools for disassembly
Economic feasibility and scrap prices
The question of whether it is profitable to hand over a refrigerator directly depends on the current quotes for scrap non-ferrous metals. The price of copper is significantly higher than the cost of ferrous metal or aluminum. However, to get this price, the metal must be cleaned of insulation, oil and other impurities.
Reception points distinguish several categories of copper:
- 🔥 Roasted copper: Obtained after burning the insulation. Rated cheaper due to oxidation and weight loss.
- ✨ Copper shine: Clean, unoxidized pieces of wire without insulation. The most expensive option.
- 🔩 Mix: Complete compressor or with remaining steel. Accepted at a price significantly lower.
If you hand over the entire compressor, it will be assessed as “copper in the housing” or even as black scrap, which is unprofitable. The maximum profit will come from cutting yourself: removing the stator, removing the plates and obtaining a clean winding. Profitability The process increases if you have access to several pieces of equipment or the ability to quickly process.
Do not forget about the cost of tools and time. If you spend an hour and a grinder blade to cut one motor, the economic sense is lost. It is effective to do this business if you have a flow of machinery or the necessary equipment for fast processing.
Frequent errors during disassembly and disposal
Beginners in the field of scrap metal collection often make mistakes that reduce the final income or create. One of the most common is burning insulation over an open fire without temperature control. Overheated copper becomes brittle and oxidizes, losing up to 10-15% of its value.
Another mistake is an attempt to hand over the compressor along with the oil. The presence of technical liquids is the basis for reducing the category of scrap or refusing acceptance. Environmental standards strictly regulate the handling of such waste, and collection points are forced to comply with these rules.
Also, many underestimate the weight of aluminum parts, confusing them with copper. Selling aluminum at the price of copper is regarded as an attempt to deceive and can lead to a conflict with the receiver. Always carefully sort metals before weighing.
In conclusion, an old refrigerator is a valuable resource that should not be simply thrown into a landfill. Proper disposal allows valuable materials to be returned to the production cycle. Recycling Copper requires significantly less energy than mining new ore, which makes this process important for the environment.
How much copper exactly is in the compressor from a ZIL refrigerator?
The compressors of ZIL refrigerators from the USSR contain the largest amount of copper. Depending on the modification of the motor, the yield of pure metal ranges from 1.5 to 2.2 kg. This is due to the use of powerful windings and the lack of savings in materials during that period.
Is it possible to sell an entire refrigerator for copper?
No, the entire refrigerator is accepted as black scrap or household appliances at a minimum price. To get the copper price, you need to dismantle the compressor, open it and remove the windings. The body and plastic parts are processed separately.
Does the year of manufacture affect the amount of copper?
Yes, it does directly. The older the refrigerator (especially before 1990), the more copper it contains. Modern models (after 2000) contain significantly less non-ferrous metal due to the use of aluminum and optimization of designs.
Is it dangerous to open the compressor yourself?
The process requires caution. The main risks: scattering of metal fragments when working with an angle grinder, contact with toxic oil on the skin and the possibility of cuts from sharp edges. The use of protective glasses and gloves is mandatory.
What to do with oil from the compressor?
Technical oil from the compressor should not be poured into the sewer or onto the ground. It must be collected in a sealed container and handed over to a special collection point for used oils or hazardous waste.