Refrigerator-freezer: what it is, how it works and which one choose

A refrigerator-freezer is an indispensable household appliance that combines two key functions: cooling food and deep freezing it. Unlike a conventional refrigerator, where the freezer compartment is often minimal or absent altogether, refrigerator-freezer offers full space for long-term storage of meat, fish, vegetables and semi-finished products at temperatures up to -18°C and below. Such models occupy the lion's share of the market due to their versatility: they are suitable for small families and for preparing for the winter.

Structurally, the device is a single body with separated zones: refrigeration (usually upper or side) and freezer (lower or separate compartment). Modern models are equipped with inverter compressors, a No Frostsystem, a freshness zone and even a superfreeze function. But how not to get lost in the variety of offers? In this article, we will look at the differences between single-chamber and double-chamber refrigerator-freezers, how to choose the optimal volume, what technologies are really important, and also how to properly operate the device so that it lasts for decades.

What is a refrigerator-freezer and how does it differ from a regular refrigerator

The main difference fridge-freezer from a classic refrigerator is - the presence of a full-fledged freezer compartment with temperatures up to -24°C. While in standard refrigerators the freezer compartment is often a small box (with a volume of 20–50 liters), in refrigerator-freezers its volume can reach 100–300 liters - enough to store six months' supplies.

Key features:

• 🔹 Two independent zones: refrigeration (from +2°C to +8°C) and freezer (up to -24°C).
• 🔹 Separate doors for each chamber (in two-chamber models), which reduces cold loss.
• 🔹 Different defrosting systems: drip (in the refrigerator) and No Frost or manual (in the freezer).
• 🔹 Energy consumption higher than that of a conventional refrigerator, but modern class models A+++ compensate for this due to inverter technologies.

It is important to understand that a refrigerator-freezer does not always mean “two-chamber” There are also single-chamber models with a freezer compartment inside the main compartment. (for example, Samsung RT28K3030S8 or ATLANT MHM 1705-80) They are more compact, but less convenient for frequent use of the freezer.

Types of refrigerator-freezers: single-chamber vs double-chamber vs Side-by-Side

The choice of refrigerator type depends on the size of the kitchen, family composition and consumption habits. Let's consider three main options:

Two-chamber models are the most popular choice due to the balance of price and functionality. For example, LG GA-B489 YVQZ offers a separate freshness area Fresh Balancer, and Bosch KAN92VI30R a system VitaFresh for long-term storage of fruit. Side-by-Side is suitable only for kitchens with an area of 12 m² or more - the standard width of such refrigerators are 90–100 cm.

How to choose a refrigerator-freezer: key ones. parameters

When purchasing, pay attention to 5 main criteria:

1. Volume chambers. Calculate 50–70 liters per person. For a family of 3 people, 250–300 liters are enough (180 liters for the refrigerator, 100 liters for the freezer).
2. Climate class. Indicates at what ambient temperature the refrigerator will operate effectively:
   • 🌡️ SN (subnormal): +10°C to +32°C — for cool rooms.
   • 🌡️ N (normal): +16°C to +32°C —standard for apartments.
   • 🌡️ ST (subtropical): +18°C to +38°C —for hot climates.
   • 🌡️ T (tropical): +18°C to +43°C — for extreme conditions.
3. Type of defrosting:
   • ❄️ No Frost —automatic defrosting, but takes up space and is noisier.
   • 💧 Drip - in the refrigerator, requires manual defrosting of the freezer 1-2 times a year.
   • 🔄 Combined - No Frost in the freezer + drip in the refrigerator (the best option).

Noise level. Optimally - up to 40 dB. Models with an inverter compressor (for example, Samsung RB30A3200SA) operate almost silently (34–37 dB).

Energy consumption. The class A+++ consumes 50% less electricity than the class A+. The difference in annual costs can reach 3-5 thousand rubles.

Additional features that are worth paying attention to:

• 🍎 Freshness zone (Fresh Zone, BioFresh) - maintains temperature 0°C for meat, fish and herbs.
• ❄️ Super freezing - quickly freezes food without loss of taste (useful for berries and vegetables).
• 📱 Smart control —the ability to control through the application (for example, in models Samsung Family Hub).
• 🔋 Offline storage cold —maintains the temperature for up to 12–24 hours during a power outage.

Refrigerator-freezer device: how it works

The operating principle of a refrigerator-freezer is based on a refrigeration cycle using a refrigerant (usually isobutane R600a or R134a). Main components of the system:

1. Compressor —the “heart” of the refrigerator, compresses the refrigerant and forces it to circulate.
2. Condenser (grid on the back wall)—removes heat, the refrigerant condenses and turns into a liquid state.
3. Evaporator —located inside the chambers, here the refrigerant evaporates, taking heat and cooling the air.
4. Thermostat —regulates the temperature by turning on/off the compressor.
5. Fans (in models with No Frost) - distributes cold air evenly.

In two-chamber refrigerators one or two systems are used cooling:

• 🔄 Single-circuit —one compressor and one evaporator for both chambers. Cheaper, but the temperature in the freezer depends on the fridge compartment.
• 🔄 Double-circuit - separate compressors/evaporators for each zone. More expensive, but more accurately supports the specified parameters (for example, in Liebherr CNesf 4865).

Inverter compressors (unlike traditional linear ones) smoothly regulate power, which reduces energy consumption by 30-40% and reduces noise. However, they are sensitive to voltage drops - it is recommended to use stabilizer.

Why is a refrigerator with No Frost more expensive?

The No Frost system requires the installation of fans and an additional heater to defrost frost. This complicates the design, increases the cost of production and increases the price for the buyer, which saves time in the long run.

Rules. operation: how to extend the life of a refrigerator-freezer

The average service life of a refrigerator is 10–15 years, but if used incorrectly, it can fail after 5 years. Basic rules:

⚠️ Attention: Never place the refrigerator close to the wall - the gap must be at least 5 cm for air circulation, otherwise the compressor will overheat, which will cause it to overheat. will lead to breakdown.

Temperature:

• 🌡️ Refrigerator compartment: +4°C (optimal for most products).
• ❄️ Freezer: -18°C (for long-term storage), -24°C (for quick freezing).

What not to do:

• 🚫 Putting hot dishes - this increases the load on the compressor and can cause to the formation of condensation.
• 🚫 Overloading the doors - this breaks the tightness of the seal.
• 🚫 Store liquids in open containers - evaporation accelerates the formation of ice.
• 🚫 Using sharp objects to remove ice - this damages evaporator.

Defrosting (for models without No Frost):

1. Unplug the refrigerator.
2. Take out all the products and put them in a thermal bag or wrap them in a cloth.
3. Put containers with warm water on shelves to speed up the process (but do not use a hairdryer or boiling water!).
4. After thawing, rinse the chambers with a soda solution (1 tablespoon per 1 liter of water) and wipe dry.

Common problems and their solutions

If the refrigerator-freezer is not working correctly, first check the simple reasons:

If the refrigerator stops turning on, first check:

• 🔌 There is voltage in the outlet (connect another device).
• 🔧 The integrity of the power cord and plug.
• 🛠️ The functionality of the thermostat (turn the knob to maximum - there should be a click).

⚠️ Attention: If after defrosting the refrigerator does not turn on and the compressor is hot, this is a sign of an interturn short circuit. Self-repair is dangerous! Contact a service center.

Tips for storing food in the freezer

The freezer allows you to store food from 3 months to a year, but only if you follow the rules:

How to freeze correctly:

• 🍖 Meat and fish cut into portions, pack in vacuum bags or cling film (layer no thicker than 5 cm).
• 🥦 Vegetables and fruits blanch (scald briefly with boiling water) before freezing - this will preserve color and taste.
• 🍞 Bread and pastries cut into slices and pack in airtight containers containers.
• 🍲 Ready meals cool to room temperature before freezing.

Shelf life (at -18°C):

• 🥩 Beef, pork - up to 12 months.
• 🐟 Fish - 3-6 months (fatty varieties are stored less).
• 🍓 Berries - 8-12 months.
• 🥕 Vegetables - 10-12 months (except for cucumbers and lettuce - not frozen).
• 🍗 Poultry - 9–12 months.

Defrosting food:

• 🕒 In the refrigerator (the safest method, takes 12–24 hours).
• 💧 In cold water (Place the packaged product in water, change it every 30 minutes).
• 🔥 In the microwave (only for quick defrosting before cooking).

⚠️ Attention: Never re-freeze defrosted products (except those that were prepared after defrosting). This leads to the growth of bacteria and deterioration of taste.

FAQ: Frequently asked questions about refrigerator-freezers

Is it possible to place a refrigerator-freezer on the balcony in winter?

No, if the temperature on the balcony drops below +10°C. The refrigerant in the compressor may thicken, which will lead to failure. The exception is models with a climate class SN-T (for example, ATLANT MXM 2835-90), but even they are not designed to operate at sub-zero temperatures.

How often do you need to defrost a refrigerator with No Frost?

Even models with No Frost require defrosting once a year for cleaning and disinfection. Ice can accumulate in the freezer compartment. due to a malfunction of the defrosting system or the door not closing tightly.

Why does ice form in the freezer if there is No Frost?

The reasons may be the following:

• The door seal is damaged.
• The defrosting heater is faulty.
• The drainage hole is clogged (water does not drain, but freezes).
• Frequent opening of the door in conditions of high humidity.

Solution: check the seal, defrost the refrigerator for 12 hours, call if necessary masters.

Which refrigerator-freezer is better: with one or two compressors?

Two-compressor models (for example, Liebherr CN 4015) are more expensive, but have advantages:

• Independent control of temperatures in the chambers.
• Ability to turn off one of the cameras (energy saving).
• More accurate maintenance of specified parameters.

Single-compressor ones are cheaper and easier to repair, but less flexible in settings.

Is it possible to transport a refrigerator-freezer lying down?

Absolutely not! The compressor is mounted on springs, and when transported lying down, oil from it can get into the circuit, which will lead to jamming. The refrigerator can only be transported in a vertical position or tilted no more 40°After transportation, wait 4-6 hours before turning it on (to equalize the pressure). refrigerant).