The modern refrigerator has ceased to be just a freezer for freezing meat and storing milk. This is a complex climatic complex, where every centimeter of internal space has its own microenvironment. Many users, when buying premium equipment, do not even suspect that they are using only 60% of its capabilities, ignoring special compartments.
The central element of advanced storage is freshness zone. It is this compartment, often hidden behind opaque panels or marked with subtle icons, that is responsible for preserving the taste, texture and vitamin content of products. Understanding the principles of its operation allows you to reduce the amount of wasted food and save your budget.
In this article we will analyze in detail the physics of the processes occurring inside the chamber and explain why some products suffocate without moisture, while others turn into mush with its excess.
Principle of operation and temperature mode
The main task of any refrigeration unit is to slow down the growth of bacteria. However, in the main chamber the temperature often fluctuates due to frequent opening of the doors. The freshness zone, or Zero Zoneas it is sometimes called by engineers, is isolated from the main volume. A stable temperature regime is maintained here, close to 0°C, but not reaching the freezing point of water.
Unlike the freezer, where -18°C reigns, here the water does not turn into ice, but the biochemical processes in the products practically stop. This allows you to store meat and fish chilled for up to a week, whereas on a regular shelf they will spoil in two days. Thermostat accuracy in this compartment is critically important.
Some refrigerator models use a system No Frost to supply air, which can dry out products. The freshness zone often has a separate circulation circuit or complete insulation to avoid exposure to dry frosty winds. This creates the perfect balance between cold and maintaining the natural moisture of the product.
⚠️ Attention: Do not overload the freshness zone to capacity. Air circulation (if provided by the design) must be free, otherwise the temperature in the center of the packs may rise, which will lead to spoilage of food.
Humid zone of freshness: we store vegetables and fruits
Plant products continue to “breathe” even after harvesting. They need high humidity so as not to wither. Wet zone (High Humidity) creates conditions close to 90-95%. In such conditions, vegetables do not lose turgor (elasticity), and fruits do not wrinkle.
Usually this is a lower drawer with a tightly closing lid. The design is designed to minimize air exchange with the main chamber. Inside, its own microclimate is created, where the moisture evaporated by the products themselves does not evaporate, but condenses and returns back.
It is strictly forbidden to store meat or fish here. High humidity combined with organic matter of animal origin will be an ideal incubator for bacteria. Lettucegreens, berries, apples and carrots feel best here.
This gas accelerates the ripening and spoilage of other vegetables. Therefore, if your drawer does not have an ethylene absorption system, it is better to store such fruits separately or in small quantities.
Dry Fresh Zone: Ideal for meat and cheese
The opposite of the wet compartment is dry zone (Low Humidity). Here the humidity level is maintained at 50%. It would seem, why dry food? The answer lies in the nature of protein products and fats.
Meat, fish, poultry and cheeses at high humidity become covered with a slippery film, begin to “suffocate” and quickly deteriorate. In the dry zone, the surface of the product remains dry, which prevents the growth of bacteria. At the same time, the low temperature does not allow fats to oxidize, preserving the taste.
Cheese in such conditions does not mold or dry out, as in a regular compartment. Sausages retain their structure. This is the best place to store delicacies that you plan to eat in the next 2-3 days.
What happens if you put cheese in a wet area?
The cheese will quickly become covered with mucus and mold, even if it is hard. Humidity will destroy its structure and taste.
The design of the dry zone often involves the presence of perforations or special channels for moisture removal. In some advanced models Liebherr or LG the humidity level is adjusted by a mechanical slider on the box itself, allowing you to turn a dry compartment into a wet one and vice versa.
Comparative table of storage areas
To finally understand the purposes of different compartments, let's consider their key parameters. Understanding the difference will help you properly distribute supplies.
| Parameter | Main chamber | Wet zone | Dry zone | Freezer |
|---|---|---|---|---|
| Temperature | +4..+6°C | 0..+2°C | 0..+2°C | -18°C and below |
| Humidity | Average (60-70%) | High (90-95%) | Low (50%) | Very low |
| Products | Ready food, drinks | Vegetables, fruits, herbs | Meat, fish, cheese | Long-term storage |
| Storage period | 1-3 days | Up to 10-14 days | Up to 7 days | Months |
As can be seen from the table, Freshness zone outperforms a regular shelf in terms of shelf life by 3-5 times. This makes its presence a mandatory criterion when choosing new equipment.
Setting and adjusting parameters
Not everyone knows that the freshness zone often needs to be adjusted manually. After purchase or after large-scale loading of products, the temperature may fluctuate. In models with electronic control (for example, Samsung Family Hub), settings are made via the touch panel.
In mechanical models, adjustment is carried out using dampers. They are usually located on the inside wall of the box or on the side wall of the chamber. By moving the lever, you change the flow of cold air. If the products begin to freeze in the freshness zone, the air flow needs to be reduced.
☑️ Checking the freshness zone settings
It is important to give the refrigerator time to stabilize after changing the settings. Thermal sensors do not respond instantly. Sharp changes in temperature conditions are harmful to the compressor.
Common operating errors
Even the presence of advanced technology does not guarantee results if you violate basic operating rules. The most common mistake is storing warm foods. If you put a hot dish in the freshness zone, you will raise the temperature throughout the entire volume, and the thermostat will command the compressor to work harder.
The second mistake is storing food without packaging. Although the freshness zone is designed for preservation, open food can transmit odors. Fish in a dry compartment will not spoil quickly, but its smell can be absorbed by the cheese lying nearby if they are not packaged.
⚠️ Attention: Never store food in an open metal container without a lid in the freshness area. The metal cools quickly and can locally “freeze” neighboring vegetables, destroying their cellular structure.
The third mistake is ignoring cleanliness. Crumbs that get into the seals of the boxes break the seal. Once a month, it is recommended to remove the drawers and wipe the guides. This will ensure that the lids fit tightly and maintain the desired level of humidity.
Frequently asked questions (FAQ)
Can milk be stored in the freshness zone?
It is better to store milk on the shelves of the main chamber or on the door (although the temperature is higher on the door). The milk is too cold in the fresh zone and may begin to separate or have an unpleasant taste due to the low temperature, close to freezing.
Why does the water in a glass freeze in the fresh zone?
The temperature in these compartments is often kept at 0°C or slightly lower. Pure water in a calm state can freeze at -1..-2°C. If your water freezes, it means the temperature in the compartment is too low for vegetables, but ideal for meat. Try to reduce the influx of cold with the regulator.
How is the freshness zone different from a regular shelf at the back wall?
The back wall of the main chamber is really cold, but there products can come into contact with condensation or freeze to the wall. The freshness zone is isolated, there is no direct contact with the cooling element, and the humidity is strictly controlled, which is impossible on an open shelf.
Do you need to defrost the drawers of the freshness zone?
There is no need to specially defrost them, since the moisture there should not freeze. However, regular washing with warm water and soda (once every 2-3 months) is necessary to remove bacteria and odors that can accumulate in plastic parts.