Is there copper in the refrigerator and where to find it: a detailed analysis of all the details

When it comes to metals in household appliances, copper is one of the first materials that comes to mind. This reddish metal is valued for its excellent thermal conductivity, corrosion resistance and ductility. But is it a modern model, or have manufacturers completely switched to cheaper analogues? The answer depends on the model, year of manufacture and even the country of manufacture. Is there copper in the refrigerator? modern model, or have manufacturers completely switched to cheaper analogues? The answer depends on the model, year of manufacture and even the country of origin.

In old Soviet refrigerators (ZIL, Biryusa, Minsk), copper was used everywhere - from freon circuit tubes to compressor windings. Today the situation has changed: many brands (Samsung, LG, Indesit) save on expensive materials, replacing copper with aluminum or steel. However, it has not yet been possible to completely abandon it. Where exactly are the copper elements left and how to identify them?

This article will help you figure out which parts of the refrigerator contain copperhow to distinguish it from other metals and why this issue is important not only for repairmen, but also for ordinary users - for example, when disposing of equipment or checking for leaks freon.

Why is copper so important in refrigerators

Copper is not just expensive, but also irreplaceable material in key components of refrigeration equipment. Its main advantages:

• 🔥 Thermal conductivity: 1.5–2 times higher than aluminum, which is critical for heat exchangers.
• ⚡ Electrical conductivity: used in the windings of electric motors of compressors.
• 🛡️ Corrosion resistance: does not rust, unlike steel, even in contact with freon.
• 🔧 Ductility: easily soldered and bends, which simplifies the installation of tubes.

That is why copper still remains the preferred material, despite its high cost. For example, in inverter compressors compressors, capacitors And evaporators Copper is still the material of choice despite its high cost. For example, in inverter compressors Mitsubishi or Panasonic copper windings guarantee stable operation for 10–15 years.

However, there is a downside: copper - one of the most expensive metals in a refrigerator, which makes it a tasty target for “black” scrap metal collectors. Some “craftsmen” even cut the tubes of working refrigerators in order to extract several kilograms of copper - this is not only illegal, but also extremely dangerous (freon under pressure can cause chemical burns).

Where exactly in the refrigerator to look for copper: disassembly by component

If you are disassembling a refrigerator for repair, disposal, or just out of curiosity, copper can be found in the following places:

1. Compressor (refrigerator motor)

The heart of the refrigerator - compressor - contains copper in two key elements:

• 🔄 Stator and rotor windings: thin copper wire (0.5–1.5 mm in diameter), wound in coils. In old models (Atlant, Stinol) it can be seen when disassembling the compressor housing.
• 🔌 Terminal connections: copper contacts for connecting power (usually covered with a layer of tin or nickel).

In modern inverter compressors (Samsung Digital Inverter, LG Smart Inverter), copper is used control circuit boards and power electronics. However, access to these parts is difficult - they are sealed in a sealed housing.

2. Condenser (radiator on the back wall)

Thin tubes that weave around the back wall of the refrigerator are condenser. In models produced before 2010, they were most often made of copper (wall thickness ~1 mm). Today, many manufacturers have switched to aluminum, but there are exceptions:

• 🏭 Premium brands (Liebherr, Bosch Serie 8) still use copper in capacitors to increase cooling efficiency.
• ❄️ Freezers with system No Frost are often equipped with copper heat exchangers for accelerated thawing.

It is easy to distinguish a copper tube from an aluminum one: copper has reddish tint (even under a layer of oxide), and aluminum is gray or matte white. In addition, copper tubes are heavier and do not bend as easily.

3. Evaporator (internal radiator)

The evaporator is a “coil” inside the refrigerator or freezer through which freon circulates. In old models it was entirely copper, but today:

• 🧊 In drip systems (for example, Indesit BIAA 13) the evaporator is often combined: copper + aluminum plates.
• ❄️ In systems No Frost (Samsung RB30J3000WW), the evaporator is usually aluminum, but copper tubes supply freon to it.

You can find the evaporator by removing the back panel inside the chamber. The copper sections will look like bent tubes with soldering (often covered with thermal insulation).

4. Capillary tube and filter drier

The thin tube connecting the condenser and the evaporator is capillary. In 90% of cases it is copper, even in budget models. Next to it is a filter drier (small cylinder), which also contains copper parts:

• 🔍 The filter housing is often steel, but mesh inside and connecting pipes - copper.
• ⚠️ When replacing the filter-drier, it is important to use copper adaptersto avoid corrosion at the joints with aluminum.

These elements are small, but critical to the operation of the system. For example, a clogged filter drier can lead to increased pressure in the circuit and compressor failure.

What happens if you replace a copper capillary tube with an aluminum one?

Aluminum has a lower thermal conductivity, which will reduce cooling efficiency. In addition, at the junctions of copper and aluminum, over time, a galvanic couple is formed, leading to corrosion and freon leaks.

How to distinguish copper from other metals: practical tips

If you are not a specialist, it can be difficult to identify copper “by eye,” especially if it is coated with paint or oxide. Here are some reliable methods:

1. Color and shine: pure copper has reddish-orange tint (like a coin). Aluminum - silver, steel - gray.
2. Weight: copper is almost 3 times heavier than aluminum (density 8.9 g/cm³ versus 2.7 g/cm³). Take two tubes of the same size in your hands - the difference is noticeable.
3. Magnet: copper does not magnetize (unlike steel). Aluminum is also not magnetic, but it can be distinguished by weight and color.
4. Soldering: copper can be soldered well with tin and rosin, aluminum - only with a special flux.
5. Sound: if you knock on a copper tube, the sound will be louder than that of an aluminum one.

For precise identification, you can use Multimeter in resistance test mode. Copper has a very low resistivity (0.017 Ohm mm²/m), while aluminum has a higher resistivity (0.028 Ohm mm²/m). However, this method is only suitable for wires, and not for massive parts.

How much copper is contained in the refrigerator: approximate figures

The amount of copper depends on the model, type of compressor and year of manufacture. The table below shows approximate data for different categories of refrigerators:

It is important to understand that in modern refrigerators copper is often combined with other metals. For example, the condenser may have aluminum fins and copper tubes, and the compressor may have steel body with copper windings.

⚠️ Attention: the data in the table is average. The exact amount of copper depends on the specific modification. For example, refrigerators Side-by-Side with two compressors (Samsung RS62R5001M9) contain almost 2 times more copper than single-compressor models.

Why does the average user need to know about copper in the refrigerator

It would seem, why does the average refrigerator owner LG or Beko understand the materials of its interior? knowledge will be useful in several situations:

1. Repair and soldering: if you are soldering refrigeration circuit tubes, you need to know what metal you are working with. Copper is easy to solder, and aluminum requires a special flux (for example, Castolin Aluflux).
2. Disposal: when selling an old refrigerator for scrap, copper is valued more expensive than others metals. Knowing its location will help you get the maximum benefit.
3. Diagnostics of leaks: copper oxidizes over time, and microcracks may appear on it. If the refrigerator poor freezing, first of all check the copper sections of the circuit for freon leaks.
4. Purchase used. equipment: if there is a lot of copper in the refrigerator (especially in the compressor), this indicates it durabilityAluminum analogues wear out faster.

In addition, knowledge of the presence of copper will help avoid fraud during repairs. Unscrupulous craftsmen may claim that “everything inside is aluminum” to justify the use of cheap spare parts. In fact, even budget models (Beko CNK 335120) contain critical copper ones. elements.

Dangers associated with copper in the refrigerator

Despite all the advantages, copper can also become a source of problems:

• 💥 Corrosion in contact with aluminum: if copper and aluminum tubes are mixed in the circuit, over time it forms galvanic steamwhich destroys the metal. This is one of the reasons for freon leaks.
• 🔥 Fire hazard: oxidized copper in the soldering areas can heat up, which in rare cases leads to a fire (especially in older models with worn insulation).
• 🦠 Bacteria on copper surfaces: although copper has antibacterial properties, in conditions of high humidity (for example, in an evaporator) it can form mold.
• 💰 Theft of scrap metal: in some regions, cases of theft of copper tubes from working refrigerators (for example, in entrances or in country houses) are not uncommon.

To minimize risks, you should:

• Regularly check the condition soldered joints (especially if the refrigerator is older than 10 years).
• Do not allow contact of copper and aluminum parts without insulation.
• When repairing, use original spare partsand not cheap analogues.

⚠️ Attention: if you notice on the tubes refrigerator green coating (patina) is a sign of copper oxidation. In this case, it is recommended to check the tightness of the circuit, since oxides may indicate microcracks.

FAQ: Frequently asked questions about copper in refrigerators

You can Is it possible to replace copper tubes in a refrigerator with aluminum ones?

Technically, yes, but this is not recommended. Aluminum conducts heat worse, which will reduce the cooling efficiency by 15-20%. In addition, corrosion forms at the junctions of copper and aluminum over time, leading to freon leaks. If replacement is necessary, use copper-aluminum adapters with anti-corrosion coating.

Which refrigerator contains more copper: No Frost or drip?

Paradoxically, but drip systems often contain more copper, since their evaporator is completely metal. The evaporator is usually aluminum, and copper is used only in the circuit tubes and the compressor. However, premium models (for example, No Frost the evaporator is usually aluminum, and copper is used only in the circuit tubes and compressor. However, premium models No Frost (For example, Liebherr) may have copper heat exchangers for improved removal. heat.

Is it worth scrapping an old refrigerator because of copper?

If the refrigerator was manufactured before 2005, then yes - it can contain up to 1.5 kg of copper, which at current prices (about 600–800 rubles/kg) gives 900–1200 rubles However, modern models contain little copper, and it is more profitable to return them as household appliances (many collection points pay 500–1500 rubles for a refrigerator, regardless of the metal content).

Why are there so little copper in new refrigerators?

Main reasons:

1. 💰 Savings: copper is expensive, and aluminum and steel are cheaper.
2. 📉 Weight reduction: aluminum is lighter, which simplifies transportation.
3. ♻️ Environmental standards: in the EU and the USA there are restrictions on the use of copper in household appliances due to difficulties with disposal.

However, in the premium segment, copper is still used - it provides better heat transfer and durability.

Is it possible to extract copper from refrigerator?

Theoretically, yes, but this is dangerous and illegalif the refrigerator is not officially written off. Risks:

• 💨 Freon leakage (toxic, explosive when heated).
• ⚡ Electric shock (voltage remains in the compressor even after switching off).
• 🔪 Sharp metal edges can cause serious cuts.

If you decide to disassemble the refrigerator, first take it to the recycling point - there the copper will be removed professionally and safely.