The question of how many kg of copper is in an old refrigerator arises among many owners of household appliances planning to dispose of or scrap metal. Refrigeration equipment is a real storehouse of non-ferrous metals, the value of which significantly exceeds the cost of ordinary ferrous metal. However, the exact weight of copper depends on many factors: year of manufacture, brand of device, type of refrigerant and compressor design.
Modern models and Soviet-era units differ radically in internal content. Old Soviet refrigerators used a steel grid and large-diameter copper tubes, while in new models, manufacturers often replace copper with aluminum to reduce the cost of construction. Understanding these differences is necessary in order not to get into trouble when estimating the value of scrap.
In this article we will analyze in detail where exactly to look for valuable metal, how to correctly calculate the expected yield and why the weight of raw materials ready for delivery may differ from the theoretical one. You will find out whether it is worth disassembling the equipment yourself or whether it is better to hand over it entirely, and also become familiar with the current nuances of pricing at collection points.
Factors influencing the amount of copper in the unit
The first thing you need to understand is that copper weight in the refrigerator is not a constant. It directly depends on the technological stage at which the device was produced. Units produced in the middle of the 20th century contained significantly more non-ferrous metals, since the task of austerity saving resources was not set then. In such models, copper was used everywhere: from electric motor windings to heat exchangers.
Over time, technology has changed. Manufacturers have begun to introduce aluminum alloys, which are lighter and cheaper, but are inferior to copper in thermal conductivity and durability. Therefore, in a refrigerator from the 90s there will be less copper than in a model from the 60s, and in a modern device its presence may be minimal or absent in visible contours.
⚠️ Attention: The copper content also depends on the condition of the unit. If the refrigerator was being repaired, some copper tubes could be replaced with aluminum or steel, which will significantly reduce the final weight of the non-ferrous metal upon delivery.
The most important factor is the type of refrigerant the compressor is designed to work with. Old freons required the use of steel and copper in certain proportions, while new environmentally friendly gases made it possible to change the design of heat exchangers. In addition, the weight is also influenced by the brand of a particular manufacturer - European brands often use higher quality and “heavier” components than budget Chinese counterparts.
Where to look for copper: the main components of a refrigerator
In order to understand how many kg of copper you can get, you need to know anatomy refrigerator. The main sources of non-ferrous metal are the compressor (motor-compressor) and the condenser grid (heat exchanger). It is these nodes that contain up to 90% of all copper present in the device. The remaining parts, such as the body, shelves and plastic, are of interest only as scrap or waste.
The compressor is the heart of the refrigerator. Inside its casing there is an electric motor, the windings of which are made of copper wire. The weight of this winding varies depending on the power of the motor. The compressor also contains copper tubes for supplying and discharging refrigerant, but their weight is insignificant compared to the weight of the winding. When scrapping, they often evaluate the weight of the “meat” (the steel case with the insides) or try to extract the copper by sawing the case, which requires special equipment.
The capacitor grid, located at the back or built into the walls of the case, is a system of tubes. In older models it was pure copper, in newer ones it was copper-plated steel or aluminum. You can determine the material by the color of the cut (copper is red, aluminum is silver) and weight (copper is heavier). Copper is also contained in shut-off valves and connecting fittings if they were not replaced during repairs.
How to distinguish copper from brass?
Copper has a bright red color when freshly cut and is very ductile. Brass has a yellowish tint and is harder. When heated, copper turns black, but brass retains its color. In refrigerators, pure copper M1 or M2 is most often used; brass is found in fittings.
Another source that is often forgotten is the electrical wiring and control board. Although the weight of copper is small (usually a few tens of grams), it matters during mass processing. Wires are used for insulation, and printed circuit boards require complex processing to extract precious metals and copper.
The weight of copper in a compressor: calculations and realities
It is the motor-compressorthat is of greatest interest to deliverers. This is the heaviest and most expensive element to recycle. A standard household compressor weighs from 10 to 25 kg. However, you need to understand that most of this weight is made up of the steel shell and cast iron piston parts. The copper winding directly accounts for only part of the mass.
On average, the copper content in the windings of a compressor ranges from 10% to 20% of its total weight, depending on the model and year of manufacture. For old Soviet units, this percentage could be higher due to the use of more massive windings and the lack of modern optimization. Modern compressors have become more compact, and the amount of copper in them has been reduced to a technological minimum.
Below is a table showing the approximate ratio of compressor weight and copper output:
| Compressor type | Total weight (kg) | Approximate weight of copper (kg) | Copper yield (%) |
|---|---|---|---|
| Soviet (HK, DH) | 18 - 22 | 2.5 - 3.5 | ~15% |
| Imported (90s - 00s) | 12 - 16 | 1.5 - 2.2 | ~13% |
| Modern (inverter) | 9 - 11 | 0.8 - 1.2 | ~10% |
| Industrial (small) | 25 - 30 | 4.0 - 5.0 | ~16% |
It is important to note that extracting copper from a compressor at home is extremely difficult. The case is sealed, and inside there is oil that contaminates the metal. Reception points often accept entire compressors in the “electric motor” or “mix” category, the price for which is lower than for pure copper shavings or burnt metal. Self-cutting makes sense only if you have a large amount of equipment.
Condenser and tubes: how much can be collected
The second most important source is the heat exchanger. In old refrigerators such as "ZIL" or "Biryusa" there was a grid of copper tubes at the back. The weight of such a grid could reach 2-3 kg of pure copper. This was the “golden age” for nonferrous metal collectors, since the tubes were thick and easy to cut. In more modern models, the tubes became thinner, and the material changed to aluminum. This can be determined using a magnet: copper and aluminum are not magnetic, steel is. If the tubes are magnetic, then the copper content in them is negligible (only a thin outer layer), and it will not be possible to sell them as copper - they will be accepted as black scrap or a mix.
In more modern models, the tubes have become thinner and the material has changed to copper-bonded steel or aluminum. This can be determined using a magnet: copper and aluminum are not magnetic, steel is. If the tubes are magnetic, then the copper content in them is negligible (only a thin outer layer), and it will not be possible to sell them as copper - they will be accepted as ferrous scrap or a mix.
- 🔴 A pure copper tube has a characteristic reddish tint at the break and does not react to a magnet.
- 🔵 The aluminum tube is silver, very light and also not magnetic, but is much cheaper.
- ⚫ Copper-plated steel is magnetic, the color border is visible on the cut, weighs more than aluminum.
In addition to the rear grille, the tubes can be mounted into the walls of the refrigerator (in a foamed space). It is almost impossible to remove them from there without damage and loss of weight. Therefore, when assessing “how many kg of copper are in an old refrigerator”, you should take into account only the accessible external elements, unless you plan to completely disassemble the case and violate its integrity.
⚠️ Attention: When you try to cut tubes from the foamed space, toxic substances are released. Use a respirator and work in a ventilated area. Do not burn insulation and foam on an open fire to facilitate access to the metal.
Differences between Soviet and modern models
The difference between a refrigerator made in the USSR and a modern European or Asian unit is colossal. Soviet technology was created with decades of service and maintainability in mind. The metal was thick, the motor windings were massive, and the tubes were pure copper. The weight of one such refrigerator could reach 70-80 kg, a significant part of which was non-ferrous metal.
Modern refrigerators are 20-30% lighter. Manufacturers are using thinner steel, plastic elements and composite materials. Resource saving has led to the fact that the amount of copper in a new refrigerator is minimized. For example, in some budget models, even the motor windings can be made of varnished aluminum, which makes them practically useless for delivery as copper scrap.
☑️ Signs of a "copper" refrigerator
It is also worth noting the difference in the delivery price. An old refrigerator is interesting precisely as a source of copper, while a new one is often sold entirely for the weight of the body or for plastic recycling. If you are the owner of an old Soviet unit, you are luckier in terms of potential profits from disposal.
Economic feasibility of disassembly
Is the gamble worth it? To answer this question, you need to carry out simple mathematical calculations. Let’s say the price of copper is about 600-700 rubles per kg (prices vary), and ferrous metal is about 15-20 rubles. If there are 2 kg of copper in the refrigerator, then the revenue will be about 1200-1400 rubles. If you sell it entirely as scrap, the proceeds will be about 300-500 rubles.
However, labor costs must be taken into account. Disassembling the refrigerator, removing the grille, dismantling the compressor, sawing it (if the collection point does not accept it entirely) takes several hours of work. In addition, you need tools: an angle grinder, wire cutters, a hammer, protective equipment.
If you have one refrigerator, it is easier to hand over it entirely or call a recycling service. If you collect equipment regularly or you have accumulated 10-20 pieces of old equipment, then preliminary cutting and sorting of copper will bring tangible financial benefits. On the scale of one unit, the difference may not cover the cost of electricity and tool depreciation.
Frequently asked questions (FAQ)
Is it possible to hand over the entire refrigerator without disassembling it?
Yes, most scrap metal collection points accept entire refrigerators. However, in this case they will be assessed as “scrap of household appliances” or “mix”, the price for which is significantly lower than for sorted copper. Weight can also be calculated with a factor for contamination.
How much does the copper winding weigh in an average compressor?
In an average household compressor, the weight of the copper winding ranges from 0.8 to 2.5 kg. The exact value depends on the power of the engine and the year of its manufacture. In older powerful models, the copper yield was higher.
Why are there no copper tubes in new refrigerators?
Copper is an expensive material. To reduce production costs, manufacturers switched to aluminum and copper-plated steel. This makes the refrigerator cheaper for the end buyer, although it reduces the service life of the heat exchanger.
Does it need to drain freon before delivery?
Releasing freon into the atmosphere yourself is prohibited by environmental standards, since many refrigerants destroy the ozone layer. When delivered to official recycling points, the gas must be pumped out by specialists using special equipment.
How to find out the exact weight of copper without disassembly?
It is impossible to accurately find out the weight without disassembly. You can only approximately estimate it by knowing the compressor model and year of manufacture of the refrigerator, and by consulting technical reference books or non-ferrous metal yield tables for this series.