What kind of copper is in the refrigerator: composition, tubes and radiators

The question of the content of non-ferrous metals in household appliances often arises not only among inquisitive craftsmen, but also among those who plan to recycle an old unit. Copper is one of the key materials in refrigeration equipment, ensuring effective heat transfer and tightness of the circuit. However, its quantity and location directly depend on the year of manufacture of the model, the manufacturer and the cooling technology used.

In modern realities, manufacturers are increasingly replacing expensive elements with cheaper analogues, which significantly affects scrap weight the value of the device upon delivery. To understand whether it is worth disassembling the device for the sake of metal or whether it is easier to hand over it entirely, it is necessary to disassemble in detail the design of the refrigeration circuit.

Next we will look in detail at where exactly this metal is hidden, how to distinguish it from aluminum and why in some models it is practically absent. Exact data will help you make an informed decision regarding your future fate equipment.

Locations of copper in the refrigerator structure

The main accumulation of valuable metal is concentrated in the refrigerant circulation system. The classic scheme involves the use of copper tubes to connect the compressor to the condenser and evaporator. This particular material was chosen for its ductility, corrosion resistance and excellent thermal conductivity.

The most massive part containing Cu (cuprum)is the capacitor located on the rear wall. In older models it was a separate coil that could be easily removed. In modern units, the tubes are often foamed or hidden behind decorative panels, which makes them difficult to remove without damaging the housing.

Also, a significant amount of material is located in the capillary tube - a thin pipeline connecting the condenser to the evaporator. Despite the small diameter, the length of this section can reach several meters, which in total gives a noticeable weight. Pipelines High pressure ones are always made of durable alloy.

⚠️ Attention: When trying to remove the pipes yourself, there is a high risk of damaging the system if there is still freon left in it. This is not only dangerous to health, but can also lead to a fine for the release of ozone-depleting substances.

Don't forget about the compressor itself. Although its body is made of steel, the motor winding contains commercial copper inside. However, it is almost impossible to remove it from the sealed casing without special tools, therefore, when scrapping, the compressor is usually accepted as ferrous metal or an assembled electric motor.

Hidden reserves

The tubes can pass inside the walls of the refrigerator (behind the foam), and their removal requires cutting the housing, which makes further operation impossible.

Differences between copper and aluminum heat exchangers

For a long time, copper was the only material for refrigeration equipment. However, in pursuit of cheaper production, many brands switched to aluminum. It can be difficult to visually distinguish these metals, especially if the surface is painted or oxidized, but there are proven methods.

The first and easiest way is a magnet. Neither copper nor aluminum are magnetic, but this test can immediately eliminate steel strapping. To differentiate non-ferrous metals, you need to pay attention to the weight and color of the cut. Copper alloy is much heavier and on a fresh cut has a characteristic reddish-golden hue.

• 🔴 Color: pure copper has a pinkish-red color, aluminum is silvery-white.
• ⚖️ Weight: a copper tube is noticeably heavier than an aluminum tube of the same size.
• 🔨 Plasticity: copper is softer, bends easier and does not break when bent, aluminum is more fragile.

In modern refrigerators, a combined option is often found: the outlet pipe from the compressor is copper, and The radiator (condenser) or evaporator is made of aluminum or aluminum-coated steel. The connection of dissimilar metals is carried out through special adapters, which are also of interest to assemblers.

Aluminum evaporators, especially in models with a “crying” defrosting system, are extremely sensitive to mechanical damage. In contrast, they are copper coils more durable, but their use in the budget segment is now rare. If you see a marking on the radiator Al, it means there is a minimum of valuable metal there.

How much copper can be obtained from one refrigerator

The amount of metal extracted varies widely and depends on the size of the unit and its age. Old Soviet refrigerators, such as ZIL or Biryusa early series, were real “gold mines” for scrap collectors. Their design involved the use of thick-walled tubes along the entire circuit.

Modern single-chamber and double-chamber models have become much more economical in terms of materials. Manufacturers have learned to minimize the consumption of expensive resources by using thin-walled tubes and reducing their length by optimizing circuits. On average, from one household refrigerator you can get from 0.5 to 2.5 kilograms of pure copper.

It is worth considering that when delivering non-ferrous metals to collection points, cleaning of solder, paint and steel elements is often required. Dirty copper with impurities is valued much cheaper. Therefore net weight will differ from the weight of the dismantled components.

The highest content of precious metals is observed in large-volume models and commercial equipment. In small office refrigerators, the amount of copper can amount to hundreds of grams, which makes disassembling them economically impractical at home.

The influence of the No Frost system on metal content

System No Frost (without frost) radically changes the internal architecture of the refrigerator. In such models, the evaporator is hidden in a special compartment, usually behind the back wall of the freezer, and is blown by a fan. This design decision affects the amount and availability of copper.

Unlike static systems, where the evaporator is an open grid (often aluminum), No Frost uses a compact heat exchanger. The tubes here are thinner, and the evaporator itself can be made entirely of aluminum. Only the connection areas with the compressor and the high-pressure line remain copper.

Disassembling such models is more difficult: to get to the evaporator, you often have to dismantle plastic panels, fans and the melt water drainage system. At the same time, the evaporator itself can weigh only a few tens of grams in terms of pure metal due to the thin walls of the tubes.

⚠️ Attention: In refrigerators with the No Frost system, the tubes often pass through polyurethane foam insulation. Removing them as “live” pieces is almost impossible without destroying the housing.

Another feature is the presence of additional copper elements in the defrosting system, although most often there are nichrome heaters. The main attention should be paid to the condenser, which in No Frost models is often located below, near the compressor, and can be made in the form of a lattice radiator.

Technical features and alloys

Refrigeration equipment uses not pure copper, but its alloys, which have increased strength and corrosion resistance. The most commonly used brand is M1 or M2, which allow a minimum content of impurities. The tubes undergo an annealing process, becoming soft and flexible, which allows the formation of complex coils.

Special adapters and solders are used to connect copper sections to steel or aluminum parts. Solder may contain silver, which increases the value of scrap, but in small quantities. It is important to understand that the presence of steel at the ends of the tubes reduces the grade of the metal upon acceptance.

Modern environmental standards dictate the use of new types of refrigerants, which may require different characteristics of the tubes. However, copper still remains the de facto standard for high-pressure areas, where it is necessary to withstand significant loads without the risk of depressurization.

• 🔩 Wall thickness: varies from 0.6 mm to 1 mm depending on the pressure in the system.
• 🌡️ Heat resistance: the material can withstand temperature changes from -40°C to +80°C.
• 🛡️ Protection: often coated with varnish or tin to prevent oxidation.

When analyzing the composition, it is also worth mentioning brass valves and filter-driers that may be found in the circuit. Brass is an alloy of copper and zinc, and although it is valued cheaper than pure copper, it can also be turned into non-ferrous scrap.

Economic feasibility and disposal

Is it worth disassembling the refrigerator for the sake of copper? The answer to this question depends on the current market prices for non-ferrous scrap and the value of your time. If you have access to free technology and tools, this can be a small source of income. However, buying a refrigerator specifically for disassembly is almost always unprofitable.

In addition, it is necessary to take into account the costs of disposing of the remaining “skeleton”. After extracting the copper and aluminum, you will be left with a ton of ferrous metal, plastic and penoizol, which also need to go somewhere. Reception points often require separate delivery of fractions.

In professional recycling, refrigerators undergo a complex recycling process, where all useful components, including freon and oils, are extracted. Self-disassembly in a garage can be harmful to the environment, so it is important to take precautions.

⚠️ Attention: Prices for non-ferrous scrap metal are variable and depend on the region. Before starting mass disassembly, check the current prices at the nearest collection points.

The most rational approach is to hand over the entire refrigerator to specialized organizations or use recycling programs from stores when purchasing new equipment. This saves hassle and ensures safe recycling of all components of the device.

Where else to look for copper

In old refrigerators, copper can be in electrical wiring, thermostats and start relays, but there is very little of it there.

Frequently asked questions (FAQ)

Is it possible to determine the presence of copper by the weight of the refrigerator?

Indirectly - yes. Heavier older models are more likely to contain more metal. However, modern weight can be added up due to thick plastic, glass shelves and the compressor, so only a visual inspection or an autopsy will give an accurate answer.

Is there copper in the refrigerator compressor?

Yes, the compressor motor windings contain a significant amount of copper wire. However, the compressor is sealed, and copper can only be removed from there by sawing the steel casing, which requires special tools and skills.

Why is there little copper in new refrigerators?

Manufacturers are trying to reduce production costs and the weight of the device to reduce transportation costs. Replacing copper with aluminum and steel in heat exchangers is the main way to save money, despite the fact that aluminum is less durable.

Is it dangerous to disassemble the refrigerator yourself?

Yes, it can be dangerous. There may be pressure remaining in the system, and the insulating foam may contain remnants of old freon, which releases toxins when burned. There is also a risk of cutting yourself on sharp metal edges or getting an electric shock when disassembling an electrical part.

How to distinguish brass from copper?

Brass has a more yellow, dull tint, while copper is a rich reddish-pink color. Brass is harder and rings when struck, copper is softer and sounds duller. When broken, brass has a fine-grained structure.