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The total capacity of the refrigerator is the total capacity of all the main working chambers: refrigerating, freezing, zero, and wine chambers. The set of these chambers, of course, will be different in different models (see more about them above). Here we note that large volumes, on the one hand, simplify the storage of numerous products and, on the other hand, affect the dimensions and price of the unit. It is also worth considering that refrigerators of the same total capacity may differ in the capacity of individual chambers.

Inverter compressors are called compressors that can smoothly change the power of work.

The compressor is a pump that pumps freon through the cooling circuits of the refrigerator. A conventional (non-inverter) compressor has only one power level, and the cooling intensity changes due to periodic switching on and off: the longer the time of continuous operation and the fewer interruptions in operation, the stronger the cooling, and vice versa. Such a design is inexpensive, but it has several disadvantages — in particular, uneven cooling, relatively low temperature control accuracy, and a tendency to create power surges in the network where the refrigerator is connected. Inverter compressors run continuously, while the pump power varies depending on current needs. Thanks to this, refrigerators with compressors of this type are free from the described disadvantages and have some other advantages, such as low noise level and energy efficiency. On the other hand, such units are quite expensive.

The total capacity of the main working chamber of the refrigerator. If there are separate zero chambers, compartments for wine and other additional functions, this paragraph takes into account only the volume of the refrigerating chamber itself, without additional equipment. In the smallest modern units, this figure does not even reach 100 liters, in the largest it can exceed 400 liters.

The choice of capacity depends on the actual storage needs of the products. At the same time, both the volume of stocks and the frequency of their replenishment (every day, once a week, etc.) matter. The chamber should not be stocked completely; this adversely affects the quality of the refrigerator. On the other hand, it is worth remembering that large volumes accordingly affect the dimensions and price of the unit.

In general, for one or two people, a capacity of 200 – 250 liters, or even less, is considered quite sufficient. The optimal capacity for a family of three is about 250 – 300 liters, for four to five people — 300 – 350 liters, and larger volumes are really needed mainly for specific situations when food has to be stored in large quantities and for a long time.

Separate zones that help expand your food storage options. Among these there are multizone — , fresh zone, humidity zone, low temperature zone, wine chamber, bottle rack. More details about them:

— Fresh zone. A special compartment designed for long-term storage of fresh vegetables, herbs and other similar food. Such a compartment can be made in the form of a completely separate chamber. In such cases, it is called the zero chamber and its volume is separately indicated in the specifications. However, more often the fresh zone is located inside the main compartment. Anyway, the humidity in this zone is somewhat higher than in the refrigeration compartment, and the temperature is somewhat lower: in some models, it is about zero (which allows you to store raw meat or fish), in others it is about +1 .. .3 °C (this is only suitable for fruits, vegetables and cheeses). Anyway, the moisture from the products in the fresh zone does not evaporate as quickly as in the main chamber, and the contents retain their original appearance and taste longer. This feature is especially useful if there is a No Frost system (see above) in the refrigeration chamber of the unit.

— Humidity zone. Another feature designed for long-term storage of fresh food is similar to the fres...h zone described above. The difference is that freshness is preserved solely due to the increased humidity of the air (hence the name). The temperature corresponds to the temperature in the refrigeration chamber. The humidity zone is intended mainly for storing vegetables and fruits; in some refrigerators, this compartment has a humidity control that allows you to optimally adjust it to different types of contents (detailed recommendations on this can be found in special sources)

— Low temperature zone. A compartment in which a lower temperature is maintained than in the main chamber of the refrigerator. Typically, fresh meat or fish are supposed to be stored in the low-temperature compartment. The presence of such a compartment allows you to more effectively organize long-term storage of food in the refrigerator and keep it fresh longer.

— Multizone. A compartment that combines the functions of several compartments at once. The simplest option is the ability to work in the mode of a refrigerator or freezer. However, in modern refrigerators, there are multizones with more extensive capabilities. These features can be quite specific — like quickly cooling drinks, slow defrosting, and even cooling hot dishes. So the specific features of the multizone should be specified separately. Nevertheless, its presence significantly expands the capabilities of the refrigerator. Also, in some models, the entire freezer performs the function of such a chamber. However, most often the multizone is still designed separately from other chambers.

— Wine chamber. Specialized compartment for long-term storage of wine. Usually, a temperature of +10..12 °С is maintained in such a compartment — it is this temperature considered optimal for this task. Some models may also provide the possibility of more precise temperature settings — for different types of wine. The traditional equipment of a wine chamber includes a shock-absorbing system that dampens vibrations from the compressor and other shocks, as well as carbon filters to protect against foreign odours; and the door of such a chamber is traditionally made transparent — so that you can see the collection of wines without opening the refrigerator.
Nowadays, this function is found only in some premium refrigerators. It is because most wine connoisseurs prefer to use specialized wine coolers: such devices are less bulky and often more functional.
— Bottle rack. Shelf of a special design for the convenience of storing bottles in the refrigerator. It has the form of stands of a wavy shape. In the recesses of such "waves" it is convenient to keep bottles of small or medium size: they do not roll over the refrigerator and are at hand; you just need to open the door.

A device for neutralizing foreign odours in the refrigerator compartment. The source of such odours can be not only spoiled but also quite usable products, for example, smoked fish. And some types of food, in turn, tend to absorb these odours, which negatively affects their aroma and taste. The deodorizer avoids such troubles by purifying the air inside the refrigerator.

The capacity of the freezer installed in the refrigerator. Such a chamber is designed to store products at temperatures well below zero (on average -18 °C). Its capacity is related to the total capacity of the refrigerator (and the capacity of the main, refrigerating chamber). However, there is no strict dependence here — models with a similar volume of the refrigerating chamber can be equipped with freezers of different sizes.

When choosing by capacity, it is worth considering how much frozen food you plan to store at a time. Note that it is undesirable to fill the freezer completely — this negatively affects the efficiency of work. However, if this chamber is planned to be used only occasionally, and you do not plan to keep numerous products in it, you can not chase after the capacity: for such cases, 25 – 50 liters, or even smaller capacities, are enough. In the smallest modern refrigerators, the freezer capacity does not exceed 10 liters. And vice versa, very roomy freezers come across — for 176 – 200 liters and even more. Such volumes are typical mainly for side-by-side and French door units (see "Product type"). However, they are also found in models of the classic two-chamber layout.

The operating temperature of the refrigerator freezer.

The generally accepted standard for freezers is actually -18°C. It allows you to effectively store pre-frozen foods, as well as freeze them (with certain precautions). At the same time, for most modern refrigerators, lower temperatures are claimed — at -24 °C, and in some models even lower. However, such indicators are not always standard — in many units, they are achieved only in the fast freeze mode (see "Features"). This should be clarified separately. However, the temperature of the freezer below -18 °C means good freezing features.

In turn, chambers with more modest minimum temperatures — -12 °C, or even -6 °C — are only suitable for storing pre-frozen products; they are not suitable for freezing any significant amount of contents. However, there are very few refrigerators with such indicators on the market — mostly low-cost or outdated models.

To indicate the temperature of the freezer, markings in the form of asterisks (snowflakes) are often used, each of which means a decrease in temperature by 6 °C. For example, in models at -24 °C, you can find the designation * (***) — four asterisks, one of which is highlighted. This usually means that in the standard mode the freezer operates at -18 °C (three stars), and at another 6 °C (down to -24 °C) the temperature drops during fast freezing.

The autonomy time provided by the refrigerator when the power is turned off.

Often, this parameter describes the capabilities of the freezer. In such cases, the autonomy time is indicated as the time during which, at an outside temperature of +25 °C, the temperature in the filled freezer does not rise above -9 °C (this level is considered critical for the storage of frozen foods). Accordingly, the actual autonomy time may differ from the claimed one — depending on the ambient temperature, the frequency of opening the refrigerator, etc. However, this parameter describes the quality of thermal insulation quite accurately, and it is possible to evaluate different models and compare them with each other.

Also, autonomy time can be given for models without freezers: in such cases, we are talking about the time during which the temperature in the refrigerator compartment remains at an acceptable level under approximately the same conditions.

The type of controls for refrigerators is indicated primarily by the type of control panel. Often its location is also taken into account. According to these criteria, nowadays, the following options are distinguished: rotary knobs, internal push-buttons, external push-buttons, internal touch controls and external touch controls. Here are the features of each of these options:

— Rotary knobs. Control using rotary knobs. Such knobs are traditionally installed inside the refrigerator, so in this case, the location is not specified. In general, this is the simplest and most inexpensive option used in units of the appropriate level. Most often, there is only one rotary knob; it is directly connected to the thermostat and regulates only the temperature inside the refrigerator (and even then very approximately). However, even this is often quite enough — especially if the refrigerator is operated in more or less constant temperature conditions (for example, in a home or office kitchen). In many cases, the matter is limited to choosing a more or less suitable knob position once and then not touching the settings at all. In addition, the unambiguous advantages of this type of control are reliability and ease of repair.

— Internal push-buttons. Push-buttons are generally considered more advanced th...an rotary knobs. The specific functionality of refrigerators with such control may be different, but among them, models with additional functions and the ability to fine-tune the temperature (and sometimes even humidity) are noticeably more common. As for the interior layout, it allows you to hide the panel behind the refrigerator door, providing a neat appearance with a minimum of protruding parts. And if the door has a child lock, in this case, it also performs the function of protecting against children. However, to access the controls you have to open the refrigerator — but this moment is generally not critical: such access is not needed so often, and changing settings does not take much time.

— External push-buttons. Like the internal push-buttons (see above), such controls are typical mainly for fairly advanced models (although exceptions are possible). And the external location is convenient because you do not need to open the door to access the settings. On the other hand, the real need for such an arrangement is not so often, and push-buttons must also fit into the overall design of the unit (which is not always possible to do in the best way). As a result, the external version of push-button controls is much less common than the internal one.

— Internal touch controls. Internal touch controls are considered the next step in the development of controls, after buttons. So, they look stylish and technologically advanced, they do not need to be pressed hard (just touched), and there are no protruding parts, corners and cracks on the surface of the panel, which simplifies cleaning from dirt. Accordingly, the presence of touch controls is typical mainly for refrigerators of the middle and top levels. It costs a little more than a push-button one, but this is imperceptible against the background of the total price of the units. But specifically, the internal location is much less common than the external one. It is because there is no need to hide the touch sensors behind the door — they can be easily fit into the external design of the refrigerator.

— External touch controls. The general features of touch controls are described above. And external touch panels in refrigerators are used much more often than internal ones: such panels can be given almost any appearance, optimally fitting them into the design of the refrigerator. Besides, placing them outside allows you not to open the door again to access the settings.