3 June 2006

Many models of modern refrigeration units are characterized by the presence of systems forced circulation air intended for the following purposes:

• pumping air through an evaporator located outside the refrigerator or freezer chamber to prevent the formation of frost in the chamber itself (No Frost system and its modifications);
• ensuring uniform air circulation in the volume of the refrigerator or freezer to create a uniform temperature field.

No Frost system

The system of forced air pumping through the evaporator, located outside the freezer, was developed and patented by specialists from the Zerowatt factories, part of the Candy industrial group. Under the name Frost Free, this system can be found in refrigerators brands of the specified group: Candy, Hoover, Iberna. Recently, along with Frost Free by different manufacturers the more generally accepted name No Frost is increasingly being used, and by Frost Free Candy specialists mean a forced ventilation system only in the freezer compartment.

The “No Frost” system is shown in the example of an AEG upright freezer in Fig. 1.

Rice. 1 No Frost system of upright freezer:

Cold air, using fan 1, is evenly distributed throughout the volume of the compartment and carries moisture (which causes the formation of frost) to the evaporator 2 located outside the freezer, where the moisture freezes. The refrigerator's automation periodically defrosts the evaporator (the fan stops running during this time), the melt water flows into tray 6 and evaporates. This prevents ice from forming in the freezer compartment and eliminates the need for defrosting.

A number of models have a system of channels for supplying air not only to the freezer, but also to the refrigerator compartment (Fig. 2.).

Rice. 2. No Frost system of a two-chamber refrigerator.

To designate such a scheme, the terms Total No Frost, Full No Frost are used.

The presence of the “No Frost” system leads to increased energy consumption of the refrigerator compared to a static cooling system. In table 1 shows the parameters of models that are similar in chamber volume, but differ in the cooling system. It can be seen that the appearance of the “No Frost” system lowers the energy consumption class of the model by 1 - 3 steps. A slight reduction in the volume of the freezer compartment is also noticeable due to the installation of the “No Frost” system.

Table 1. Energy consumption parameters of refrigerators with a static cooling system and a No Frost system

Brand	Model	Refrigeration volume/ freezer compartment, l	System cooling	Energy consumption, kWh/year	Energy class
Indesit	RG 2330 W	265/75	Static	441	B
Indesit	RG 2330 NF	265/60	No Frost	620	E
Siemens	KG 36 E 04	237/90	Static	350	A
Siemens	KK 33 U 01	237/74	No Frost	412	B
Freezers
AEG	OKO-Arctis Super 2772 GS	262	Static	329	B
AEG	OKO-Arctis Super 2794 GA	261	No Frost	460	C

A disadvantage of the “No Frost” system is also that the pattern of air flows in the chamber and, consequently, the efficiency of washing off its various zones with a cold stream depends on the degree and nature of the refrigerator’s loading with products. The “No Frost” system imposes certain requirements on product packaging, since in the absence of packaging, forced air circulation leads to dehydration of products.

Some manufacturers install independent “No Frost” systems in the freezer and refrigerator compartments. In Fig. 3 and 4 show diagrams of Samsung's Twin Cooling System for options for independent cooling of the refrigerator and freezer in side-by-side layouts (Fig. 2, a) with top (Fig. 3, b) and bottom position freezer (Fig. 4).

Rice. 3 Samsung Twin Cooling System:
a) in a side-by-side refrigerator; b) in a device with a top freezer

Rice. 4 Samsung Twin Cooling System
in a device with a bottom-mounted freezer

Examples of refrigeration units with the “No Frost” system in both compartments: Samsung SR-S27FTA, SR-S25FTA, SR-S24FTA, SR-L678EV, SR-L628EV; Ariston ETDF 450 XNF; Whirlpool ARG 497, ARG 477 DD, ARG 468 DD.

Air circulation systems in departments

To solve the problem of creating a uniform temperature field in the refrigerator or freezer compartments, manufacturing companies are improving the organization of air flows.

In Fig. Figure 5 shows the Samsung Super-X-Flow system, which is a vertical screw fan installed on the rear wall of the refrigerator compartment and creates vortex air flows, the axis of which is directed vertically.

Rice. 5 Samsung Super-X-Flow system

In Fig. 6 shows the Air Shower system of the same company, which creates an “air shower” in the freezer. According to Samsung, thanks to the air shower, the speed of freezing food in the chamber doubles: the freezing time in a regular chamber is 166.3 minutes, and in a chamber with an “air shower” - 86.5 minutes.

Rice. 6 Air system Shower from Samsung

The Super-X-Flow and Air Shower systems are installed together, for example, in refrigerator models such as Samsung SR-V57 and SR-52NXA, and only the Super-X-Flow system is installed in models SR-39NXB, SR-L678EV, SR( G)-V43, SR(G)-V39 and others.

A number of manufacturing companies are developing systems for organizing multi-level flows in the refrigeration compartment. Samsung has this Multi-Flow system (Fig. 7), which is equipped with refrigerators with dual system cooling.

Rice. 7 Samsung Multi-Flow System

The Merloni Elettrodomestici company installs the A.I.R. (Ariston Integrated Refrigeration) system in Ariston brand refrigerators (Fig. 8), which allows you to maintain a constant temperature throughout the volume of the refrigerator compartment and quickly restore the temperature in it, even with frequent opening of the door.

Rice. 8 A.I.R. system from Merloni Elettrodomestici S.p.A.:

As shown in Fig. 8, the flow of cooled air A is directed downward, and warm air B enters the annular air intake from above. The presence of a forced ventilation system in the refrigeration compartment is reflected by the letter V in the model designation, for example: Ariston ERFV 402 X, ERFV 383 X, EDFV 450 X.

A similar purpose is served by the forced air circulation system in the refrigerator compartment DAC (Dynamic Air Cooling), used in Zanussi Rondo series refrigerators (Fig. 9)

Rice. 9

And also a forced ventilation system from VEKO (Fig. 10), used, for example, in the VEKO NCH 5010 refrigerator.

Rice. 10 VEKO forced air circulation system

Good luck with the renovation!

The article was prepared based on materials from the publication “Refrigerator Repair” published by SOLON-Press series « repair » №35

All the best, writeto © 2005

In the section on the question Refrigerators with Full No Frost and Multi Air Flow asked by the author Yatyana Kim the best answer is These functions do not affect the amount of electricity consumed at all. When buying a refrigerator, pay attention to the power consumption class; you need to choose class A. Refrigerators of this class are energy saving.
I have a Bosch KDN 32A71, energy consumption class “A”, NoFrost system in the freezer, it works great, no complaints. By the way, I am very pleased with the know frost function. Previously, defrosting a refrigerator was like hard labor for me... it's all over)))

Answer from Anna Matsaeva[expert]
The most important thing is that at night you can pick up more tasty things and the rest is nonsense

Answer from Olga Deryabina[newbie]
Both the drip type and know frost have energy efficiency class A (A+), which means that they consume the same amount of electricity. Progress does not stand still. I remember those times when I couldn’t open the freezer because of the ice in there, now I’ve forgotten what it means to defrost, only mine. By the way, Bosch also has a drip type, if you are so afraid to buy a new product.

Answer from Andrey Ruban[newbie]
We use a refrigerator from Kurpersbusch, model IKEF 3080-2 Z3. I highly recommend it. A premium segment refrigerator, made of very high quality and thoughtfully. Everything for convenience, automatic defrosting, dynamic cooling. 3 temperature zones, and looks very stylish. In general, there are a lot of pros, but we haven’t found any cons.

Artificial intelligence

This is exactly what some manufacturers call artificial intelligence: the ability of a refrigerator to independently control and change the intensity of its operation, depending on operating conditions. In simple words, the electronics of the refrigerator periodically measures the ambient temperature, temperature and humidity inside the refrigerator and, based on this, most effectively organizes the operation of the compressor (change in power, on-off). This allows you to always maintain optimal temperature and humidity in the refrigerator and freezer compartments for high-quality food storage. In addition, it helps to save electricity.

For the Japanese, things are a little more complicated. Panasonic refrigerators use ECONAVI technology. Let's just say that electronics analyze information from various sensors over the course of two to three weeks, about how often the owners open the refrigerator doors, at what time of day this happens more intensely, into which zones of the refrigerator more products are loaded, it also takes into account temperature conditions in the room where the refrigerator is located. Then, based on his own observations, he optimizes the operation of the refrigerator - again, correctly building the compressor operation algorithm, saving (when possible) electricity and, conversely, increasing the speed during the greatest “food” activity of users. A similar technology in Mitsubishi Electric refrigerators is called Neuro Fuzzy.

Refrigerators of various brands with intelligent temperature and humidity control systems can be purchased in Russia.

Against odors and bacteria

Various smells, sometimes not the most pleasant ones, are eternal companions of food storage. They may also appear in the refrigerator. To get rid of them faster, modern models there are filters through which air passes (a fan usually helps with this). As a rule, filters are carbon, adsorbing, absorbing odors. Everything, in general, is quite simple, but quite effective - odors are removed. Filters, however, need to be changed sometimes, but it’s better this way than bad smell in a refrigerator.

It’s not always limited to just absorbing odors. carbon filter. Often along with it there are also filters that serve other purposes. The same Hygiene Fresh technology from LG, for example, is based on the passage of air through a four-layer filter cartridge, which also fights fungi and bacteria.

Other manufacturers not only filter the air in the refrigerator, but also strive to disinfect it, and therefore reduce the likelihood of the development of “wrong” bacteria, which lead to the appearance of an unpleasant odor (rotting). This is done using air ionization.

The air ionizer in the refrigerator fills its interior with so-called active oxygen, negatively charged particles (ions), which partially neutralize harmful bacteria, as well as fungus and mold spores. Active oxygen destroys unpleasant odors in the refrigerator and prevents fresh food from absorbing them. The shelf life of foods stored in a refrigerator with an ionizer increases. But, of course, you shouldn’t expect that, for example, preserved vegetables or fruits will remain fresh for a month. Usually this is an increase of 2-3 days, which is very good for fresh products.

Sometimes, as in the case of Panasonic, disinfecting air filtration is also used, based on the antibacterial properties of silver (Panasonic's Ag-Clean technology). The coating of the internal walls of the refrigerator can also have disinfecting properties (also “silver” technologies).

Refrigerators different brands With various systems Air purifications in the internal space are also available in domestic stores.

"Hot" freezing

It is known that it is very undesirable to put hot foods in the refrigerator - this will increase the temperature inside it, which is not only bad for other products, but also leads to an increase in energy consumption (how to save when using household appliances we told you earlier). First, it is recommended to cool the products to room temperature. This is true for most refrigerators, but not Mitsubishi Electric.

This manufacturer has models with the Versa universal chamber, in which you can freeze hot foods. The technology is called Hot Freezeeng. Sensors detect the temperature of hot products, which are exposed to a direct flow of cold air. This method of freezing saves time and, according to the manufacturer, preserves the taste of the products. The design of the compartment includes a double flap door, so that all the heat will remain inside this chamber. By the way, the Versa is called a universal chamber because it can also activate the mode of fast deep freezing of products, gentle freezing (products, for example, sauces, do not turn into one piece of ice, but retain a soft consistency), and it can also be used as a regular freezer box.

Mitsubishi Electric refrigerators with Versa and Hot Freezeeng are sold in our country.

Such a different freshness

The freshness zone is a common solution; many modern refrigerators have it. This may be one or two containers in the refrigerator compartment, but it is better if the freshness zone is separated into a separate chamber with its own door - it is easier to maintain optimal temperature settings and the desired level of humidity. This is exactly the meaning - correct temperature and humidity for high-quality storage of certain products.

For chilled fresh meat, fish, seafood, and some cheeses, the desired temperature is -1-0°C, and the humidity level is 50-60%. Under such conditions, their shelf life increases - this is the so-called dry freshness zone. But for storing vegetables, fruits, berries and herbs, the ideal temperature is 0-2°C and a humidity level of 90-95% - a zone of moist freshness. Most often, control of the humidity level in freshness zones is carried out mechanically (you open or close special dampers on containers), but there are models where this responsibility is assigned to electronics.

Today on sale, including in our country, you can find many refrigerators with freshness zones of different designs. The pioneer of introducing a freshness zone into a refrigerator was the Liebherr company, which back in 1996 introduced the BioFresh storage system with temperature maintenance from -1-3°C and the ability to adjust it within this range, as well as with humidity control.

Freshness zones are called differently by different manufacturers:

• HydroFresh in refrigerators of the BSH concern (Bosch, Siemens, Neff);
• NaturaFresh in Electrolux refrigerators;
• FreshZone in Gorenje models;
• Panasonic's Chilled Room;
• Opti fresh zone from LG;
• Fresh room or CoolSelect Zone (freshness zone with five operating modes) from Samsung;
• FreshStor Active 0°C in Whirlpool refrigerators.

It's not just temperature and humidity settings in individual containers that can help keep food fresh longer. There are other ways. For example, LG refrigerators have a special Vita Light lighting in the box for vegetables and fruits; according to the manufacturer, LEDs create lighting in their spectrum similar to that of the sun (photosynthesis continues), which helps to better preserve vitamin C in products, as well as increase their shelf life .

The honeycomb lid of the container for them - LG Moist Balance CISPER technology - helps maintain the optimal level of humidity for storing fruits and vegetables. Condensation collects in special cells of the container lid (“honeycombs”), and in a much smaller volume falls on the products (than in the case of a regular smooth lid), and it evaporates slowly. As a result, there is no overmoistening of the products, which helps to accelerate the decay process, but there is also no lack of moisture - this is good for the appearance and taste of fruits and vegetables.

LG refrigerators with Vita Light and Moist Balance CISPER are easy to find in Russian stores.

Cold everywhere

It is important that the cooled air is evenly distributed throughout the refrigerator and supplied to each shelf. This is especially true for refrigerators with glass shelves (the majority of them now) - after all, they are an obstacle to its circulation. Manufacturers solved this problem by installing multi-threaded cooling in refrigerators. The idea is that cooled air, driven by one or more built-in fans, passes through special slots in the rear wall of the refrigerator compartment, located at different levels and is supplied to each shelf, which minimizes the temperature difference between the lower and upper segments of the compartment (the temperature at the top always higher). Multi-flow cooling is available in refrigerators of various brands; there are no problems with purchasing them in Russia.

Vacuum storage

It has long been known that food lasts longer in a vacuum. For example, special containers are sold from which air is pumped out (then, by the way, it is advisable to put them in the refrigerator). But the Germans from Siemens implemented this storage method directly in refrigerators. That’s what the innovation was called – Vacuum technology. The product is placed in a special container (it is part of the refrigerator), and by pressing a button the air is pumped out of the container. As a result, freshness without contact with air is preserved approximately 5 times longer than when stored in normal conditions, says the manufacturer. This camera is especially useful for long-term storage chilled meat or fish.

Alas, models with Vacuum technology are not yet available in Russia, and they are not available in Europe either. But the Germans, according to BSH representatives, successfully sell them in China.

Of course, not only refrigerator manufacturers from Germany thought of organizing a vacuum in the refrigerator; the Koreans are not far behind. For example, in LG refrigerators a similar freshness preservation technology is called Vacuum Fresh.

Soda from the refrigerator

It won’t surprise anyone that a modern refrigerator can pour a glass of cold water. It can make both ice cubes and crushed ice - it all depends on the capabilities of the built-in ice maker. But until recently refrigerators didn’t stock soda. This feature was implemented in their models by the Koreans from Samsung Electronics, together with the company SodaStream. Now the user can even select the degree of carbonation. You press the button and you get a glass of cool sparkling water. The gas cylinder is installed in a special chamber in the refrigerator door. The function is optional, but, you see, it’s nice.

Samsung refrigerators that dispense soda can also be purchased in Russia.

Two circuits

Trend recent years– refrigerators with separate cooling circuits for the freezer and refrigeration compartments: one compressor, and two air circulation systems (two evaporators, two fans). This allows you to improve the energy efficiency of the refrigerator, more accurately maintain desired temperature in the compartments, has a positive effect on the level of humidity in the refrigerator compartment (drier air does not enter from the freezer, better storage conditions), and also eliminates the possibility of mixing odors of products that are in different compartments.

Refrigerators with double cooling circuits are sold all over the world, including our country.

Refrigerator Vacations

How was it before? I plugged in the refrigerator and both compartments – the refrigerator and the freezer – work. Turned it off - both do not work. Today everything is different. In many refrigerators, when you go, for example, on a business trip or vacation, you can leave the freezer operating in normal mode and switch the refrigerator compartment to economical mode. At the same time, let the food remain in the freezer, but in the refrigerator compartment the temperature will be about 15°C, which will save it from mold and unpleasant odors, but will require emptying it of its contents. Usually this mode in refrigerators is called “Holidays” or “Vacation”.

The “Vacation” mode is available in many refrigerators today, including those presented in Russian stores.

If the refrigerator has two compressors, the user can completely turn off any compartment, regardless of the other. This can also be useful: both in case of travel, and if there is simply no need for a certain period of time, for example, in a freezer.

Double door

LG has refrigerators with Door-in-Door technology. The idea is that there is a smaller door in the main door of the refrigerator compartment. It opens with a light press of a button and provides access to a fairly spacious box where you can store anything you want - you want what is usually stored in a minibar, or you just want the products that you most often need during the day. It is possible baby food, in general, whatever you want. Additional convenience– basket with lifting mechanism combined with a convenient compartment with a pull-out drawer. It's not just about quick access and no need to search for the right jar in a large refrigerator. This approach also saves electricity - after all, the main door does not open, not so much air at room temperature enters the refrigerator, and less energy is spent on lowering the temperature to the optimal level.

Other Koreans - from Samsung - also did not ignore the refrigerator doors. They probably did it on a larger scale, although it was similar in meaning. Refrigerators with the Food Showcase food storage system also have a kind of first door - you open it and in front of you is, as it were, an external refrigeration compartment: 6 compartments for storing food different types(cheese, sausage, drinks, sandwiches, baby food and others). In addition, this space is divided into 3 zones in which you can store products for different purposes: for cooking, for the whole family, for children, etc. This approach, again, makes it easier to find what you need in the refrigerator and saves electricity - less warm air gets inside the refrigerator.

LG Door-in-Door and Samsung Food Showcase models are also sold in Russia.

Modern compressor

Some refrigerators (for example, LG, including models available in the Russian Federation) are today equipped with linear compressors with inverter control power. The pros, in a nutshell, are that a linear compressor has fewer moving parts, fewer friction points. Instead of circular movements of the crankshaft and connecting rod of a conventional compressor, there is movement, let’s say, in a straight line: there is no crankshaft and connecting rod in a linear compressor at all. Higher reliability and energy efficiency, it is more durable.

The main difference between a linear compressor and all those traditionally used in household refrigerators is the absence of a link that converts the rotation of the electric motor rotor into the movement of a piston mechanism. In linear compressors, the pistons themselves move under the influence of an electromagnetic field.

Inverter control of refrigerator compressor power is now implemented in models from many manufacturers, including those sold in our country. As in an air conditioner, this allows the compressor to work not discretely, turning on and off (which is why the greatest wear occurs), but smoothly increasing or decreasing power, depending on the need (maintaining the temperature set by the user in the refrigerator compartments). The noise level is also lower.

No defrosting

It would be wrong not to recall in this material the system of automatic defrosting of the refrigerator (or rather, freezing without frost) - No Frost. Still, this is a revolutionary innovation - it ends the era of manual defrosting of refrigerators (remember this fight against ice in the freezer using saucepans with hot water?). Thanks for No Frost we must say to Liebherr, a famous European manufacturer of refrigerators.

The Germans introduced this technology into their refrigerators back in 1987. Of course, frost still appears on the evaporator. The user just doesn’t see it and doesn’t have any contact with it: the evaporator is located behind back wall freezers. The built-in fan circulates air in the freezer, most of moisture from it condenses on the cold evaporator, becoming frost, which is why there is no ice directly in the freezer. Next to the evaporator is a heating element, which is cyclically turned on and off by a timer signal. When the heater is working, the frost melts, and the water flows through a special channel into a bath intended for it above the compressor and gradually evaporates. In most refrigerators of different brands, this technology is called No Frost; today it is widespread and represented in markets all over the world, including Russian.

Previously, only refrigerator freezers could boast of No Frost. In the refrigerator compartment there was usually drip system defrosting (static). But today there are quite a few models where No Frost is everywhere (but, of course, there is still one in the refrigerator compartment temperature regime). LG calls this approach Total No Frost and is based on the symbiosis of the evaporator located behind the rear wall and the Multi-Air Flow Cooling System multi-flow cooling technology (forced air circulation).

If there is No Frost in the refrigerator, then the air in it is very dry. Therefore, food quickly airs out and dries out, so you only need to store them, both in the freezer and in the refrigerator compartment, in packaging or in special containers.

Almost no defrosting

Unlike No Frost, Low Frost technology can be called relatively new; it began to be promoted two or three years ago. It is implemented, for example, in Bosch and Siemens refrigerators. It is important not to confuse these technologies. Low Frost is a new solution in the design of the evaporator: it is located not only along the entire perimeter of the freezer compartment (behind its rear wall), but also on the side and top behind the walls of the freezer. This helps to avoid temperature changes in the freezer, which leads to a noticeable reduction in the amount of ice inside it. That is, this is not No Frost; a freezer with Low Frost technology needs to be defrosted, but, according to the manufacturer, not more than once a year, because very little ice is formed. Actually, Low Frost translated from English means “little frost,” while No Frost means “no frost.” The Low Frost system is also found, for example, in Zanussi refrigerators. It is possible to purchase such models in Russia.

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Source: hi-tech.mail.ru

Innovative LG refrigerators have an excellent set of advanced technologies that allow you to preserve the freshness of food for a long time and with high quality. New series of refrigerators with direct cooling system are made from environmentally friendly pure materials and have antibacterial coating of the chambers.

• Total No Frost cooling technology not only guarantees uniform cooling and freezing, eliminating the appearance of a “snow coat”, but also ensures high level energy efficiency of equipment. The system relieves the user of the hassle associated with defrosting, helps maintain the required level of humidity, and ensures the absence of condensation and unpleasant odors.
• Super freeze is a fast “shock” freezing that allows you to preserve the taste, color and nutritional properties of products without damaging their natural structure. The speed of such freezing is only 2-3 hours. This ensures quick and uniform freezing of forest, vegetable and garden produce, as well as other necessary products. The function is also convenient for instant cooking ice cubes.
• System Multi-air flow helps distribute cold air quickly and evenly between shelves, prolonging the freshness of products and ensuring their long-term storage. Uniform cooling allows you to maintain the set temperature with minimal deviations between the upper and lower sections.
• Innovative Direct Cooling technology softens the load on the compressor of the LG refrigerator, ensuring fast and even cooling of food. At the same time, energy consumption is reduced and equipment wears out significantly less. This cooling system guarantees the absence of freezing and the formation of an ice crust. With its help, you can quickly cool food and drinks, which will appeal to lovers of cool products.
• Moist Balance CISPER - reliable containers for vegetables and fruits with humidity control function. Their main secret is the presence of a unique lid, which creates optimal conditions for storing perishable products. The structure of the lid is made up of special cells that allow the humidity inside the container to be maintained at a certain level. They create the necessary seals capable of condensing internal moisture and ensure complete sealing of the container. As a result, vegetables, fruits, berries and herbs remain fresh and appetizing longer.
• Vacuum Fresh - efficient system creating a vacuum space ideal for storing fresh supplies. When activated, air is pumped out of the box, which creates special microclimate, which slows down the oxidation processes of products. Thanks to this, food retains its structure, original taste and nutrients for a long time.
• Opti fresh zone - compartment with individual temperature control. It is an adjustable freshness zone where different products the required temperature is set. Meat, fish, game and other products in this container will stay fresh and healthy longer.
• Vita Light is a container for vegetables and fruits with a mode for preserving freshness and vitamins.
• Hygiene Fresh is a unique filtration system that removes up to 99% of contaminants from the air in an LG refrigerator and allows you to keep food fresh for as long as possible. Thanks to four effective filter layers with a special coating, the system thoroughly cleans the air from fungi, bacteria and unpleasant odors. In addition, this cleaning technology provides for the presence of a deodorizer, which gives the air natural freshness.
• Bio Shield is a special antibacterial gasket that is located on the refrigerator door and helps keep equipment in impeccable hygienic condition. The antibacterial components included in it prevent the spread of fungi, mold and microbes that interfere with the storage of products.

Liebherr

Liebherr was one of the first to develop design solutions that formed the basis for the creation of modern refrigeration and freezing equipment. The innovations she invented subsequently began to be used by other manufacturers of food storage equipment.

Modern Liebherr refrigerators are the result of many years of painstaking work and the manufacturer’s great desire to satisfy the needs of users. That is why new generation devices are replete with so many technologies that provide comfort and high quality storage of any provisions.

• NoFrost is a cooling and freezing technology using active circulation of cooled air. Humid air is removed outside, and the walls of the refrigerator remain free of ice. Automatic defrosting with this technology relieves the user of labor-intensive manual defrosting, and an efficient compressor makes the device reliable and economical.
• SmartFrost - a system that ensures uniform distribution of cooled air around the entire perimeter of the refrigerator compartment, guarantees constant temperatures in all departments of the interior of the Liebherr refrigerator. The frost formed during the cooling process settles on the evaporator and automatically melts. The resulting water easily flows into a special container and subsequently evaporates. Thanks to this system, there is no need to defrost the refrigerator compartment, and the walls of the refrigerator become absolutely smooth and easy to clean.
• SuperCool - this technology guarantees fast and at the same time gentle cooling of products. The automatic function reduces the temperature in the refrigerated space to +2°C within 6 hours, and then the appliance returns to normal operation.
• SuperFrost and DuraFreeze - automatic modes quick freezing. They make freezing new stocks easy and a pleasant procedure. The temperature in the freezer compartment instantly drops, creating the necessary cold reserve, which is most suitable for maximum preservation of vitamins and nutritional value products. After the freezing process is complete, the camera returns to economical consumption electricity.
• DuoCooling is a modern cooling technology based on two independent refrigeration circuits. The system clearly delimits the space of two chambers and prevents active air exchange between them. This approach eliminates the transfer of odors from one chamber to another and prevents the products from airing.
• Frost Safe is the brand name for airtight transparent containers located in the freezer compartment. Convenient drawers are made of high-quality environmentally friendly plastic and are designed for ideal food storage. The walls of the container have a special coating that protects food from freezing and the formation of ice crystals, and their transparency allows you to easily navigate in search of the necessary supplies. This technology helps preserve all nutrients and taste qualities of provisions and prevents direct contact of products that are incompatible with each other.
• VarioSpace - the use of this system allows you to place freezer very large products, sometimes even equal to the volume of the chamber itself. Deep freezing temperatures and optimal humidity ensure complete preservation of the structure and nutritional value of products.
• BioFresh is a patented technology that ensures high quality storage of fresh products. Liebherr refrigerators equipped with a BioFreshPlus section are able to constantly maintain temperatures between -1 and +3 degrees. Taking into account also the influence of humidity on the quality of food storage, manufacturers have provided two compartments to maintain the freshness of different products. In the upper container (DrySafe), where minimal humidity is constantly maintained, it is convenient to store chilled meat, seafood and other animal supplies. The lower section (HydroSafe) with the maximum level of humidity is intended for vegetables, fruits and herbs. BioFreshPlus containers have their own electronic control system, with which you can set the required temperature level for each container separately.
• HomeDialog is an intelligent system that allows you to control the device using a special PowerLine module and a digital display installed on the door of the main refrigerator. This system is especially convenient if there are several Liebherr devices in the house at once. The module provides connection of equipment to a network without additional cable and brings the control of equipment into a single place - to the main refrigerator. Such a system helps to easily control the operation of several devices at once, displaying any changes occurring in the equipment on the main electronic screen.
• SoftTouch is an innovative control technology using a convenient touch panel. Smart electronics make it easy to control all functions of the refrigerator and guarantee that the temperatures of both chambers are maintained at the specified level.
• MagicEye Soft Touch is a unique touch display with LED indication temperature. Innovative interior lighting concept using LEDs, which provide uniform and pleasant illumination of the interior of the Liebherr refrigerator.
• SmartSteel is a technology for applying a unique coating to stainless steel refrigerator doors. Thanks to this, fingerprints become less noticeable, and the surface of the door is easily and effortlessly cleaned from dirt.

Panasonic

Panasonic refrigerators, however, like any other products of this Japanese company, equipped with the most modern technologies, which determine the needs and demands of consumers around the world. Let's go over them to understand what to expect from this technique.

• No Frost - modern system ventilation cooling and automatic drip defrosting.
• Frost Free is an automatic defrosting system for Panasonic refrigerator chambers.
• Fresh freezing - a compartment that can be used as an additional freezer. But his initial task is to subject the products entrusted to him to deep freezing at a temperature of -40°C in the shortest possible time. Thanks to deep freezing, food is stored longer without losing most of its beneficial vitamins. And in this compartment you can quickly cool and freeze almost any dish, even just cooked (the manufacturer gives hot rice as an example). Cooling occurs by blowing cold air, as well as using an aluminum tray that “generates cold.”
• Chilled Room supports optimal temperature for storing fresh chilled meat or fish, as well as dairy products.
• Wasabi is an antibacterial cartridge with an active ingredient based on the wasabi plant. It prevents ethylene gas from entering stock storage compartments and helps maintain freshness and healthy vitamins products.
• Antibacterial freshener BIO and antibacterial deodorizer - double antibacterial protection and antibacterial deodorizer. The catalytic element built into the cold air duct absorbs unpleasant odors. All these measures are aimed at purifying the air inside the Panasonic refrigerator from harmful bacteria and fungi. There is virtually no fear of mold and unpleasant odors. Double antibacterial protection allows you to keep fruits and vegetables fresh longer.
• Automatic humidity control - this original technology Panasonic allows you to maintain the humidity in the vegetable compartment at the most optimal level of 85-90%.
• ECONAVI are energy-saving sensors that, for about two to three weeks, study the behavior of their owner and his family members (for example, how often and for how long doors are opened, how much food is loaded and where, etc.), and then, based on its own observations, optimizes refrigerator operation. It is this function that greatly helps to save electricity consumption, although the device itself has already earned energy efficiency class A+ (380 kWh per year, 1.04 kWh per day).

Samsung

It is the active implementation latest technologies has made Samsung refrigerators reliable multifunctional equipment worthy of competition and user attention. Thoughtful to the smallest details, these ultra-modern units guarantee excellent quality of storage of any products and dishes.

• The No Frost system will allow you to forget about the troublesome defrosting of the refrigerator. It saves time, and your products will always remain fresh, nutritious and appetizing. In addition, an ice crust will not form on the walls, and there will be more space for food.
• Power Freeze is a super freeze that allows you to significantly speed up the freezing process. For example, this will be useful if you need to freeze a fairly large volume of food in a short time.
• Multi Flow is a system that pumps cold air into each section, creating uniform cooling throughout the entire refrigerator space. The technology provides access to cold flows to each refrigerator shelf through a separate air duct and special openings. Thanks to this, a temperature balance is established throughout the entire volume of the refrigerating chamber.
• Twin Cooling is a double cooling system that is five times more effective in preserving the freshness and original taste and aromatic properties of products compared to conventional refrigerators. Each of the two chambers has its own evaporator and fan, which maintains the optimal level of humidity for each type of food and ensures longer storage. At the same time, odors do not mix between the freezer and refrigeration compartments what happens in standard models. The TwinCooling system uses an energy-efficient compressor that Samsung claims reduces energy consumption by 30% compared to conventional refrigerators. This, of course, could not be done without electronics, which, using sensors, monitor the operation of the fans and turn them on only when necessary, so that they work for a strictly limited time, sufficient to ventilate the refrigerator.
• Smart Eco System - technology ensures economical energy consumption due to intelligent system control the operation of the compressor, taking into account the characteristics of the use of the refrigerator by your family members. Special smart sensors (SmartSensors) monitor the humidity level and temperature in the working chambers and transmit this data to the Micom electronic system to optimize compressor operation.
• MultiStorageBasket is a special basket inside a Samsung refrigerator for storing cosmetics and medicines separately from other products.
• Easy Slide - special pull-out shelf, thanks to which the amount of unused space inside will be minimal. If previously you had to place products closer to the edge of the shelf, since it was not always convenient to get them out, now you don’t have to do this. You can always pull this shelf towards you exactly as much as necessary.
• Fresh room - freshness zone.
• CoolSelect Zone - a freshness zone with five operating modes. One drawer with five operating modes. With CoolSelectZone technology, you can quickly prepare chilled drinks for your guests or quickly defrost chicken so that it retains all its flavor. Finally, you can also preserve the freshness of meat by storing it at a constant temperature of 0°C, as well as preserve the freshness of fruits and vegetables.
• Anti Virus Protector - innovative technology antibacterial coating walls of working chambers.

• No Frost (Frost Free) - technologies for effective ventilation cooling and convenient independent defrosting of equipment.
• Total No Frost is a ventilation cooling system, thanks to which cooled air constantly circulates throughout the entire volume of the refrigerator and freezer compartments. This reduces humidity, which prevents the formation of condensation and ice, and also eliminates the need for defrosting.
• No Frost Fresh is a mixed cooling system in which the NoFrost system operates in the freezer, which does not require defrosting; the products are instantly cooled and do not freeze. The refrigerator compartment is equipped with a static cooling system, which maintains optimal humidity. The advantages of a mixed cooling system are as follows:
  - the refrigerator does not require defrosting, like TotalNoFrost, but food is stored in it longer, because a drip system in the refrigerator compartment prevents food from drying out;
  - the refrigerator produces less noise (compared to TotalNoFrost);
  - the operation of a mixed cooling system requires less electricity than the operation of TotalNoFrost.
• Fast Cooling - technology for fast cooling of products.
• Fast Freezing - function of super freezing of products.
• Full Height Multi Flow is a multi-channel flow cooling system for chambers.
• 6th Sense Fresh Control - technology artificial intelligence. Whirlpool refrigerators can independently receive and analyze information about own work. This is not just about maintaining optimal conditions storage, but also, for example, energy consumption or the use of compressor labor, which turns on as rarely as necessary for stable operation refrigeration unit. One of the advantages is the convenience of the display as the main element of the refrigerator control system. Whirlpool's unique 6th Sense technology constantly adapts to changes in temperature by detecting, adapting and controlling it with special sensors that transmit information about the temperature inside the refrigerator to a special display. In addition, such a system allows the user not to worry about not closing the door tightly. The system itself will correct all mistakes and restore the required operating mode. This innovation also allows you to extend the shelf life of products.
• Triple Crisper System - multifunctional boxes with increased volume for long storage fresh vegetables and fruits. The drawers slide out conveniently and allow you to effectively use the interior space of the refrigerator.
• FreshStor Active 0°C is an effective “freshness zone” designed for storing fresh meat, fish and other chilled products for which a low-temperature microclimate is important. Thanks to the presence of special sensors, the temperature and humidity in such a compartment are kept at a constant level and are easily controlled.
• Microban and Hygiene - Hi-tech filters that help effectively combat unpleasant odors and maintain refrigerator hygiene at the proper level. The air inside the refrigerator passes through a high-tech filter with built-in Microban antibacterial elements. These active particles make it possible to destroy microorganisms that have entered the refrigerator along with the air. The validity period of such a filter is 6 months, and then the filter is easily replaced with a new one.
• Star Light is a convenient and bright LED backlight that perfectly illuminates all refrigerator shelves and at the same time ensures minimal energy consumption.