Refrigerator cooler: correct name, device and functions

When the refrigerator stops freezing or starts making noise, the first thought is that the “cooler” is broken. But you won’t find such a term in the technical documentation. The fact is that in the design of a refrigerator, a whole complex of parts is responsible for cooling, each of which plays its own role. Let's figure out how these elements are correctly calledwhere they are located and why they are confused with each other.

For example, many users mistakenly call condenser (the rear grille) a “cooler,” although its main function is to release heat to the environment. But the real “heart” of the system - evaporator - often goes unnoticed, although it is the one that directly contacts the products and lowers the temperature. In this article, we will clarify the terminology, talk about each element of the cooling circuit and explain how to distinguish them from each other.

Why the term “cooler” is misleading

In everyday life the word “cooler” is used to refer to any part that it seems is responsible for cold. However, there is no such term in the technical documentation - it is replaced by specific names: condenser, evaporator, compressor or radiator. This is why confusion arises:

• 🔧 Condenser (rear grille) - gives off heat, but does not directly cool food. It is often mistaken for a “cooler” because it is hot to the touch.
• ❄️ Evaporator (inside the chamber) - directly cools the air, but is hidden behind plastic panels and is invisible.
• ⚙️ Compressor - "pumps" cold, but is not a cooling element in itself.
• 🌀 Fan (in No Frost systems) - distributes cold, but does not generate it.

In addition, in older models of refrigerators (for example, ZIL or Minsk) the cooling circuit was visible to the naked eye - tubes with freon ran along the back wall. Modern units hid all communications under the casing, which further confused users.

Condenser: “hot cooler” on the back wall

If you touch the back wall of the refrigerator and feel the heat - this condenser (sometimes called radiator). Its main task is remove the heat that takes the refrigerant (freon) from the chamber. Without this process, the refrigerator simply could not work: the heat must go somewhere, otherwise the compressor will overheat.

There are three condensers types:

• 📐 Wire — made of a serpentine tube blown with air (more often found in older models, for example, Atlant of the 1990s).
• 🖼️ Plate —a modern version with aluminum fins for better heat transfer (used c Samsung, LG).
• 🔄 Condenser with forced air flow —equipped with a fan for accelerated cooling (typical for systems No Frost).

Signs of condenser malfunction: the refrigerator does not work. turns off (compressor works constantly), the back wall excessively hot (more than 60°C) or, conversely, cold (which means freon does not circulate). If the condenser is clogged with dust, it can be cleaned with a vacuum cleaner with a narrow nozzle - this will return normal heat transfer.

Evaporator: hidden “generator” cold" inside the chamber

This is the same “cooler” that directly lowers the temperature in the refrigerator. It is a coil of tubes through which the refrigerant flows. At the moment of evaporation of freon (transition from liquid to gaseous state) occurs. data-i="110">— therefore the air in the chamber is cooled. evaporator - this is the same “cooler” that directly lowers the temperature in the refrigerator. It is a coil of tubes through which refrigerant flows. At the moment of evaporation of freon (transition from liquid to gaseous state) occurs heat absorption - so the air in the chamber is cooled.

Where to look for the evaporator:

• 🧊 In freezer compartment —usually located behind the back wall (in models with drip system it is visible after defrosting).
• ❄️ B refrigerator compartment - hidden under a plastic panel (for example, in "Indesit" or "Bosch" it can be seen by removing the cover above the shelves).
• 🌬️ In systems No Frost there is one evaporator, but it is blown by a fan, which distributes the cold across both chambers.

If the evaporator breaks down, the refrigerator stops freezing, but the compressor continues to work. icing (due to freon leakage or clogged capillary tube). If a “fur coat” thicker than 5 mm forms on the evaporator, it needs to be defrosted and the tightness of the circuit checked.

What what will happen if you don’t clean the evaporator?

The layer of ice on the evaporator acts as a heat insulator: the compressor begins to wear out, trying to compensate for the lack of cold. This leads to increased energy consumption (up to +30%) and the risk of motor overheating.

Compressor and refrigerant: the “engine” of the cooling system

Without compressor and freon neither the condenser nor the evaporator will be able to work. The compressor is a “pump” that drives the refrigerant through the system, and freon (or its modern analogs, for example, R600a or R134a) is the “blood” of the refrigerator, transferring heat.

How it works:

1. The compressor compresses gaseous freon, heating it to high temperature.
2. Hot freon enters the condenser, where it cools and turns into liquid.
3. Liquid freon enters the evaporator through a capillary tube, where it again becomes a gas, taking heat from the chamber.
4. The cycle is repeated.

Signs of problems with the compressor or freon:

• 🔊 Loud hum or knocking - wear of the pistons or bearings is possible.
• ⏳ The compressor works without stopping - freon leakage or blockage in the system.
• 💡 The refrigerator does not turn on —the starting relay or motor winding has burned out.

⚠️ Attention: If there is a puddle of oil under the refrigerator, this is a sign of depressurization of the circuit, and the freon has evaporated, and the oil (which circulates along with the it) has leaked. In this case, urgent repairs are needed: it is impossible to refill the system yourself.

Fan and No Frost system: how the cold is distributed

In refrigerators with the system No Frost (for example, Samsung RB30J3000WW or LG GA-B409SLGL) is responsible for uniform cooling fan. It blows the evaporator and drives cold air through the chambers through special channels. Thanks to this:

• ❄️ Frost on. walls not formed (or appears in minimal quantities).
• 🌀 Temperature in all zones leveled (no “warm” and “cold” corners).
• 🕒 You need to defrost the refrigerator once a year (instead of 2-3 times, as in drip models).

However, the system No Frost there are also disadvantages:

• 🔊 Noise from the fan (especially noticeable at night).
• 💨 Products can dry out due to constant air circulation.
• ⚡ Increased energy consumption (10-15% more than drip models).

If the fan breaks, the refrigerator will continue to work, but The freezer will be colderand the refrigerator will be warmer. A common cause of breakdown is icing of the blades (the unit needs to be defrosted) or wear of the bearings (replacement is required).

Table: comparison of cooling system elements

What to do if the “cooler” is broken: diagnostics and repair

If the refrigerator does not freeze well, first check:

1. Temperature mode —the thermostat may be broken (optimal values: +4°C for the refrigerator compartment, -18°C for the freezer).
2. Door seal —if it is torn or dirty, warm air gets inside and the compressor runs idle.
3. Back wall —if the condenser is clogged with dust, clean it with soft brush.
4. Fan (in No Frost) - when the door is open, it should rotate.

More serious damage requires the intervention of a technician:

• 🔧 Freon leak —the circuit needs refilling and soldering.
• ⚙️ Compressor burned out —replacement only (cost - from 5,000 ₽).
• 🧊 Clogged capillary tube —purge required or replacement.

⚠️ Attention: Do not try to open the foamed parts of the refrigerator yourself (for example, to get to the evaporator). This will damage the thermal insulation and can lead to corrosion of metal parts. For diagnostics, use a tester or call a specialist.

FAQ: answers to frequent questions questions

Why is the condenser hot, but the refrigerator does not freeze?

This is a classic sign Freon leaks or clogging in the capillary tube. The condenser heats up because the compressor is idling, trying to pump refrigerant through a blocked system. You need to call a technician for diagnostics - he will check the pressure in the circuit and, if necessary, refill freon.

Can the evaporator be washed with water?

No! The evaporator is an aluminum or copper coil that can oxidize when in contact with water. For cleaning, use dry soft brush or a vacuum cleaner. If there is ice on the evaporator, defrost the refrigerator and wipe it alcohol wipe (without fanaticism).

How to understand that the fan in the system is broken No Frost?

Signs:

• Refrigerator hums, but does not freeze (the compressor works, but the cold is not distributed).
• In the freezer ice has formed on the back wall (the fan does not blow on the evaporator).
• When the door is open no movement can be heard air (normally there should be a slight draft).

To check the fan, turn off the refrigerator, remove the back panel of the freezer and twist the blades by hand. If they do not rotate or squeak, they need replacement.

How much does it cost to replace a capacitor?

The cost depends on the model of the refrigerator and the type of capacitor:

• For budget models (Atlant, Biryusa) — 2 500–4 000 ₽.
• For premium brands ("Liebherr", "Samsung") — 5 000–8 000 ₽.
• If the capacitor is built into the case (as in some "Indesit"), it may be necessary to replace the entire rear unit - up to 10 000 ₽.

Tip: before repairing, check whether it is cheaper to buy a new refrigerator (if yours is more than 10 years old).

Why does a new refrigerator get very hot at the back?

This is normal! The first time 24–48 hours after switching on, the refrigerator works fine! enhanced mode to reach the desired temperature. The condenser can heat up to 60–70°C. If after 2 days the heating has not decreased, check:

• The distance to the wall (should be ≥ 5 cm).
• Temperature in the room (optimal 18–25°C).
• Are the ventilation grilles blocked (for example, by furniture).