In everyday life, we are used to calling the upper or lower part of the refrigerator simply “freezer”, without thinking about the technical terminology. However, when it becomes necessary to call a technician, find instructions, or choose new equipment in a store, the correct name becomes critically important. Freezer compartment is exactly the technical name that is used by engineers and in the documentation for household appliances. Understanding the difference between the chamber, compartment and evaporator will help you more accurately describe the problem or requirements for storing food.
Many users mistakenly believe that all refrigerators are designed the same, but in fact the design can differ dramatically depending on the model and year of manufacture. Bottom freezer modern models often have a complex air circulation system, whereas in old Soviet units it was a simple metal box with a ribbed wall. Knowing the structure of your appliance is the first step to its long and trouble-free operation.
In this article we will analyze in detail what this unit consists of, what types of defrosting there are and why it is important not to confuse evaporator with the chamber body itself. You will learn how compartments are classified according to temperature conditions and what is hidden behind the snowflake markings on the front panel. This knowledge will allow you to use space more efficiently and avoid inventory spoilage.
Technical name and unit design
The official name of this component is freezer compartment (or freezer compartment, if it does not have a separate door and is located inside a common cabinet). This is the term you will find in GOSTs, technical data sheets and operating manuals. Inside the chamber there is a key element of the cooling system - evaporator. Depending on the design, it may be hidden behind a plastic panel or be exposed metal ribs, which we often see in older models.
The main function of the chamber is to maintain the temperature below -18 degrees Celsius. To do this, the compressor pumps refrigerant, which, passing through the capillary tube and entering evaporator, boils and actively absorbs heat from the internal volume. This process is cyclical and is controlled by a thermostat or electronic module. A leak in the door seal or a breakdown of the fan in the system No Frost can lead to loss of cold.
⚠️ Attention: Never try to dismantle the back wall of the freezer yourself if it is made of foam plastic. Pipes with refrigerant under pressure may pass inside; their damage will lead to an immediate release of freon and the impossibility of further repairs without expensive refilling.
Modern models are often equipped with additional functions, such as quick freezing. When this mode is activated, the compressor operates continuously, ignoring the readings of temperature sensors, in order to reduce the temperature of freshly loaded products as quickly as possible. This prevents the formation of large ice crystals that destroy the cellular structure of food.
Types of defrosting systems: static and No Frost
The most important difference that the user faces is the method of removing moisture. In static type systems, often called a "crying wall" (although this is rare in a freezer, it is more common in the refrigerator compartment), ice freezes on the evaporator and requires manual defrosting. You must periodically turn off the device from the network and wait until the ice melts on its own. This is a labor-intensive process that takes from 12 to 24 hours.
Technology No Frost ("without frost") radically changes the approach. Here the evaporator is hidden in a special compartment, usually behind the back wall of the chamber or in the upper part. Air is forced to circulate through this hidden heat exchanger using a fan. The defrosting heating element is periodically turned on, which melts the ice on the hidden evaporator, and the water flows into the drain pan. The user does not need to do anything. A defrosting heating element that melts ice on a hidden evaporator, and the water flows into the drain pan. The user does not need to do anything.
- ❄️ No Frost: Complete absence of ice, products do not freeze to each other, but the air is very dry, which requires packaging of food.
- 💧 Low Frost: A compromise option, where ice forms, but very slowly (once a year), and it is easy to remove.
- 🧊 Manual defrosting: Thick layer ice that needs to be chipped, there is a risk of damaging the evaporator tube with a sharp object.
It is important to understand that in systems No Frost the absence of visible ice does not mean that there is no moisture at all. It is removed in the form of steam or droplets, so the products in such chambers quickly ventilate. The use of airtight containers or cling film becomes a prerequisite for storage.
Classification by temperature modes
Not all freezers are the same. There is always a marking in the form of snowflakes on the front panel or inside on the wall. This is not just decor, but a class of freezing abilitywhich determines the minimum temperature and shelf life of products. Ignoring these symbols may result in the meat spoiling long before the expected expiration date.
One snowflake means that the chamber is capable of maintaining temperatures down to -6°C. This is rather ice maker or a compartment for short-term storage of already frozen products (no more than a week). Three and four snowflakes indicate the possibility of deep freezing to -18°C and -24°C, respectively, which allows you to store supplies for months.
| Symbol | Temperature | Shelf life | Purpose |
|---|---|---|---|
| * | up to -6°C | up to 1 week | Ice, short-term storage |
| ** | up to -12°C | up to 1 month | Frozen semi-finished products |
| *** | up to -18°C | up to 1 year | Long-term storage of meat, fish |
| **** | up to -24°C | up to 1.5 years | Quick freezing of fresh food |
The presence of four stars (***) also often indicates the presence of the function quick freezing. In this mode, the device can freeze up to 2-4 kg of fresh food per day to a safe temperature. If you load more, the central part of the piece may not have time to freeze, which will lead to the growth of bacteria inside.
Chamber location: top and bottom
Traditionally, the freezer compartment was located at the top of the refrigerator. This is due to the laws of physics: cold air is heavier than warm air and tends to sink down. Thus, the cold from the freezer naturally cooled the main refrigerator compartment. However, in such models freezer volume usually limited, and the user has to constantly bend down to get food from the main part.
The modern trend is the location of the camera at the bottom. Such models are often called “European”. Since the cold does not rise down on its own, forced circulation or separate cooling circuits are used here. The advantage of this arrangement is in ergonomics: the main compartment, which is used 90% of the time, is at eye level, and the freezer is used less often.
⚠️ Attention: In refrigerators with a bottom freezer and a No Frost system, it is critical to regularly clean the drainage hole. If it becomes clogged, water from the defrost will flow over the edge and flood the floor, since the drain pan in such models is often located directly above the compressor at the bottom.
There are also Side-by-Side models, where the freezer and refrigerator compartments are located side by side the entire height of the cabinet. This is convenient for large families, but requires a wide niche for installation. Such devices often have a zone Fresh Zonewhere the temperature is close to zero, which is an intermediate link between the main chamber and the freezer.
☑️ Checking the condition of the freezer
Problems with ice and their causes
Excessive ice formation (“fur coats”) is the most common problem faced by owners of old refrigerators and devices with manual defrosting. If you see that the layer of frost exceeds 5-7 mm, the efficiency of the device decreases and energy consumption increases. The compressor is forced to work longer to break through the heat-insulating layer of ice.
The main reason is a violation of the tightness. If sealing rubber the door is dry or dirty, warm, moist air from the kitchen constantly flows inside. Moisture condenses on the coldest surfaces and freezes. Also, the reason may be the habit of users to place hot or simply warm dishes in the chamber.
In No Frost systems, the formation of a “fur coat” inside the chamber itself is impossible by definition. If you see ice on the food or the bottom of the drawers in such a refrigerator, this is a sign of a malfunction:
- 🚫 The defrosting heating element is faulty: ice clogs the air supply channels, and cold stops flowing into the chamber.
- 🚫 The defrost timer or sensor has burned out: the system “does not understand” that it is time to melt the ice on the hidden evaporator.
- 🚫 The drainage is clogged: the water has nowhere to go, it freezes and forms snowdrifts at the bottom of the chamber.
To defrost, you must completely turn off the device, remove all products and leave the doors open. It is strictly forbidden to use a knife, hair dryer or hot water to speed up the thawing process. Sharp temperature changes can lead to cracks in the plastic case or damage to the evaporator tubes, which is a complex and expensive repair.
Rules for operation and storage of products
In order freezer compartment to serve for a long time, it is important to follow the loading rules. Don't overcrowd the drawers: free space is needed for air circulation (especially in No Frost systems). If the drawers are packed tightly, the fan will work with overload, and the temperature in different corners of the chamber may differ.
It is best to store products in labeled bags or containers. This is not only hygienic, but also helps save time. Frozen chicken without packaging will become covered with a “snow coat” and lose its taste. In addition, odors mix in the freezer: fish can transfer their aroma to strawberries if they are not isolated.
Is it possible to freeze milk and eggs in shells?
You can freeze milk, but only in a plastic container (the glass will burst when it expands). After defrosting, it may change consistency (become grainy), so it is better to use it for baking. It is ABSOLUTELY IMPOSSIBLE to freeze raw eggs in their shells - they will explode. Egg whites and yolks can be frozen separately in containers.
There is a myth that food lasts forever in the freezer. This is wrong. Even at -18°C, slow chemical reactions occur. Fats oxidize (rancid taste appears), proteins denature. The shelf life depends on the type of product: minced meat is stored for 3-4 months, whole meat - up to a year, vegetables - 8-10 months.
Why does it form in the freezer? ice if I did not open the door?
This may occur due to a violation of the seal, even if the door is visually closed. The cause may also be a clogged drainage hole, which is why the water from previous defrost cycles does not drain away and freezes, building up layer by layer. The third option is a malfunction of the humidity sensor or thermostat.
What temperature should be in the freezer for long-term storage?
The optimal temperature for long-term storage (up to 1 year) is considered to be -18°C. At -24°C (fast freeze mode) food lasts longer, but this increases energy consumption. Temperatures above -12°C are only suitable for storing already frozen store-bought products for a short time (1 month).
Is it dangerous to defrost the refrigerator with a knife?
Yes, it is extremely dangerous. The evaporator tubes in modern refrigerators are often made of aluminum and located very close to the wall. One careless blow with a knife will cause all the refrigerant to escape instantly. Repair in this case will require replacing the evaporator (installing a new one) and complex soldering, which is often not economically feasible.
How often do you need to defrost the freezer?
No Frost systems do not require defrosting (only preventative cleaning once a year). Systems with a “crying” wall or manual defrosting require removal of ice when its layer reaches 5-7 mm. This usually happens once every 4-6 months, but depends on the humidity in the room and the frequency of opening the door.