The question about the content of non-ferrous metals in household appliances often arises among those who plan to recycle an old unit or are engaged in professional dismantling. A refrigerator is a complex technical unit, saturated with various materials, among which copper occupies a special place due to its unique conductive properties. It is this metal that makes up a significant part of the cost of the device when delivered to recycling centers.
The exact weight of copper depends on many factors, including the year of the model, the manufacturer and the type of refrigerant used. In old Soviet units, the content of precious metals and copper was significantly higher than in modern energy-efficient models. Understanding the internal structure of the device will help you plan dismantling evaluate the potential profit from selling scrap.
It is worth noting right away that simply weighing the entire refrigerator is not enough. To get a real assessment, it is necessary to disassemble the device into its components, since steel body and plastic elements make up most of the total weight, but have a low cost. The main interest for buyers is the compressor heat exchanger, where the bulk of the valuable metal is concentrated.
Where exactly is copper located in the structure refrigerator
The main source of copper in any refrigeration unit is compressor. This is the “heart” of the system, inside which the electric motor winding is located. It is this detail that most often attracts the attention of those looking for non-ferrous metal. However, in addition to the motor, copper tubes run throughout the entire cooling system, connecting the condenser and evaporator.
The second place in terms of content is occupied by radiator (condenser), usually located on the back wall of the device. In modern models it is often made of steel or aluminum to reduce the cost, but high-quality equipment still uses copper. Also, the wiring connecting various control units and sensors contains a small amount of this metal.
⚠️ Attention: In modern refrigerators, manufacturers are actively replacing copper tubes with aluminum ones. Visually they may be similar, but aluminum is not magnetic and is much lighter. Be prepared for the fact that the actual copper yield may be less than expected.
The third source is electrical wiring control boards. Although the weight of copper in cables is small compared to a compressor, when processing a large amount of equipment this volume becomes significant. It is important to distinguish between pure copper and brass alloys, which can be found in connecting elements.
The weight of copper in the compressor: calculations and reality
The compressor is the heaviest and most valuable unit in terms of the content of non-ferrous metals. Inside the sealed casing there is an electric motor, the stator of which is wound with copper wire. The weight of this winding directly depends on the power of the engine and the year of manufacture of the device.
On average, the weight of one compressor ranges from 8 to 12 kilograms. However, the pure copper content in the winding varies from 600 to 1200 grams. The rest of the mass consists of steel, cast iron and oil. To extract copper, you need to saw the housing, which is a labor-intensive and dangerous process.
How to distinguish a copper winding from an aluminum one?
Aluminum winding has a characteristic silvery color at the cut of the wire, while copper is reddish-orange. In addition, aluminum is lighter and is often coated with a thicker layer of varnish to protect against oxidation.
It is worth considering that in older models produced before 2000, the windings were made more massive, using more metal. Modern inverter compressors can have a lighter winding weight due to changes in design and the use of rare-earth magnets, which reduces the amount of copper but increases efficiency.
Copper in heat exchangers and tubes
The refrigerant circulation system consists of tubes that connect the compressor, condenser and evaporator. In the classical scheme, these elements are made of copper, since it has high thermal conductivity and resistance to corrosion. The length of such a circuit in an average refrigerator is about 15-20 meters.
However, the diameter of the tubes is very small - usually from 3 to 6 millimeters. Due to the thin walls, the total weight of copper in the tubes rarely exceeds 300-500 grams for the entire unit. If the radiator (rear grille) is made of painted steel, then copper will remain only in the internal wiring hidden in the case.
There is a table that helps to roughly estimate the amount of metal in various components:
| Refrigerator assembly | Type of metal | Approximate weight (grams) | Difficulty of extraction |
|---|---|---|---|
| Compressor winding | Copper (winding) | 800 - 1200 | High (tool needed) |
| Tubes contour | Copper | 200 - 400 | Medium (needs cutting) |
| Radiator (condenser) | Steel / Aluminum | 0 (if not copper) | Low |
| Wiring and Cables | Copper | 100 - 150 | Low |
It is important to understand that extracting copper from thin tubes is often not economically feasible if you do it manually without specialized equipment. The time spent may not recoup the cost of the scrap obtained.
Differences between old and new models
Technical progress dictates its conditions, and manufacturers of household appliances are constantly looking for ways to reduce costs. If you take apart a refrigerator produced in the 80s of the last century, for example ZIL or Saratov, you will be pleasantly surprised by the amount of metal. In those days, they saved less by using thick-walled tubes and massive windings.
Modern units, such as LG, Samsung or Bosch, are designed taking into account environmental standards and saving resources. They often replace copper with aluminum in heat exchangers, and lighter alloys and composite materials are used in compressors. This reduces the overall weight of the device and the amount of non-ferrous metal at the output.
In addition, systems are being introduced in new models No Frostthat require the installation of additional fans and sensors. This increases the amount of plastic and electronics, but does not add a significant amount of copper. On the contrary, complex condensate drainage systems may require the use of polymer tubes instead of metal ones.
Safe dismantling technology
If your goal is to obtain copper, you will have to disassemble the refrigerator. This process requires compliance with safety precautions, since there may be refrigerant inside the system and pressurized oil in the compressor. You should start work only after completely disconnecting the device from the network.
To remove the compressor you will need a set of tools: wire cutters, pliers, as well as a grinder or a hacksaw for opening the casing. It is important not to damage the winding when cutting, so as not to reduce the cost of scrap or damage the engine if you plan to repair it.
☑️ Tools for disassembly
⚠️ Attention: In old refrigerators, freon could be used as a refrigerant, which, when in contact with an open fire (when cutting), forms toxic phosgene. Work in a well-ventilated area and avoid open flames.
After removing the back panel and dismantling the compressor, carefully saw through the copper pipes at the inlet and outlet. Drain the oil into a separate container - it can also be used as waste. Next comes the most labor-intensive stage: opening the compressor housing to access the stator.
Economic feasibility and disposal
Is the game worth the candle? If we consider copper mining as a garage business, then the profit from one refrigerator will be minimal. The cost of 1 kg of copper scrap fluctuates, but even at high prices you will receive an amount that barely covers the cost of tools and electricity.
However, if you have access to dozens of pieces of equipment, for example, when liquidating offices or working in a service center, then accumulating and sorting copper becomes justified. In this case, it is important to correctly classify the metal: “shine” (cleaned wire) is valued higher than “mix” (tubes with solder and dirt).
For most individuals, the optimal solution is to hand over the entire refrigerator to a specialized organization for recycling household appliances. They will independently disassemble the unit, extract all valuable components, including copper, aluminum and steel, and ensure safe processing of harmful substances.
Frequently asked questions (FAQ)
Approximately how much does copper weigh in one compressor?
On average, one standard household compressor contains from 600 to 1200 grams of copper. The exact weight depends on the engine power and the year of production: in older models there is more copper, in new ones there is less due to optimization of designs.
Is it possible to hand over the entire refrigerator as scrap copper?
No, the refrigerator is accepted as scrap ferrous metals (steel) or as household scrap (ABS plastic, steel, aluminum). Copper makes up less than 5% of the total mass, so buyers will not price the entire refrigerator at the price of copper. It must be removed separately.
What are the dangers of disassembling the compressor yourself?
The main risks: residual refrigerant pressure, the possibility of flying metal fragments when sawing the housing, the presence of toxic oil and the risk of electric shock if the device is not turned off. Personal protective equipment is required.
Where is the most copper located: in the tubes or in the motor?
The absolute majority of copper (about 80-90%) is found in the compressor motor winding. Thin tubes of the circuit contain a small amount of metal compared to the massive stator winding.