No Frost - what is it? Refrigerator with No Frost system. No Frost System

If you have any thoughts about buying a refrigerator, you just need to know what the No Frost system is so often voiced by the home appliances managers. What this signifies can be understood even from a literal translation.

So, No Frost in Russian translates as "without frost". That is, in the process of functioning of the refrigerator on the internal surfaces, there will be no snow-ice cap, which must be manually peeled off and extracted from the freezer. But such an ice build-up negatively affects the freezing qualities of the camera and significantly increases the energy consumption of the refrigerator.

No Frost System - what is it?

A large number of users and potential buyers of household appliances think that the frost, therefore, the ice cap in the No Frost system refrigerators is not formed at all.

In fact, everything happens differently. So, warm and moist air inside the room, getting to the freezer compartment of the refrigerator of any system, condenses and cools, turning into hoarfrost. That is, whatever technology is used (whether it's Frost Free, No Frost or Full no Frost), still the frost will form. Simply in the above types of cooling equipment used ultramodern evaporator defrosting systems.

The main differences between freezer No Frost

Freezers No Frost have a number of differences from refrigerators in which a conventional cooling system is used. The main distinguishing feature is the absence in evaporators of evaporators (air cooler), which is usually found only in the freezer compartment of a conventional refrigerator and is a metal plate of small thickness.

In the dropper, there is no evaporator in the refrigerating chamber. Immediately remember the "wonderful" moments of defrosting the refrigerator with puddles on the floor and frozen hands.

Therefore, buyers of household appliances raise a question: "Which refrigerator is more practical: a drop or No Frost?" Therefore, it is necessary to consider in more detail both systems of equipment.

The structure of refrigerators with droplet thawing

This type of refrigerator is one of the most common today. In this system, the main part of the air cooler is in the freezer compartment, and its auxiliary part is in the mid-temperature compartment.

The auxiliary evaporator, which is often called the evaporator lobe, can be located directly on the back surface of the chamber (conventional type), or be mounted (recessed type).

The mechanism of operation of refrigerators with a drop system

In the equipment of this type, the freezer is defrosted in manual mode. That is, about once every six months (very rarely in comparison with old-type refrigerators), the user will have to defrost the icing freezer on his own.

The thawing of the lobe of the cooling system of the mid-temperature compartment is automatic. The compressor of the refrigeration system has two cycles of operation: active and passive phases. During the active phase, the compressor operates, and the petal cools. At the same time, an ice crust forms on its surface. When the temperature in the compartment has reached the required level, the compressor turns off. The evaporator will begin to heat up under the influence of air from the working chamber of the refrigerator compartment (the temperature in the working chamber never falls below zero), respectively, the ice on its surface will melt. The melted moisture flows through the special tubules into the container above the compressor, from which it will subsequently evaporate.

The structure of refrigerators using the No Frost system

The main constructive difference between the "filling" of the icing system is the structure of the evaporator itself. Most often it is located either in a special recess or on the back wall of the freezer compartment, it has the shape of a serpentine with ribs.

Also, a special ventilation mode is used in the refrigerators of the No frost system. What does it mean? Each representative of this system has a built-in fan that drives warm air through special channels to the evaporator, and then cooled - back to the refrigerator chamber. This is the highlight that No frost refrigerators are different from drop drums.

Mechanism of operation No Frost

As with the old defrosting system, no frost will also form on the frost chamber evaporator of the No Frost system. However, a constructive solution of the following kind was invented: a special electric heater is used for periodic defrosting of the evaporator system. So, every 10-12 hours the compressor turns off and the heaters (thermal electronic heaters) are turned on, which thaw the existing layer of ice and drain the liquid beyond the freezer compartment. In the event that a fan is installed on the evaporator, it will be called an air cooler.

Features of Frost Free and Full no Frost

These systems have some technological differences, but are built on the same principle as No Frost. What are these developments, we will consider further in the article.

The system Frost Free uses elements like No Frost, and drip defrost. So, in the freezer a coil with a fan (No Frost) is installed, while in the middle temperature chamber there is an element of a petal evaporator.

A feature of Full no Frost is the presence of two completely separate evaporator defrosting systems, one for each functional compartment of the refrigerator (freezing and medium temperature).

That is, both systems use the same No Frost technology, only in different forms and volumes.

Sometimes you hear from your friends that they will not buy a refrigerator with the No Frost system, which is an extra waste of money. However, in order to evaluate all the pros and cons of this technology, it is advisable to compare it with the traditional drip defrosting system.

The positive moments of using the No Frost system refrigerators

1. Freezing of food occurs at a very high rate. In many models there is a function of instant freezing (for example, in LG No Frost).

2. Thermoregulation in the refrigerator runs at high speed. That is, for such an aggregate, it will not be a problem to open the door frequently or to load a large number of non-cold products.

3. Unlike the drop system, the temperature drop across the entire volume of the freezing chamber or the chamber with the medium temperature regime is extremely low and is approximately one degree.

4. The most important plus, of course, is the automatic defrosting of the evaporator. The user, for example, SAMSUNG No Frost, does not need to spend his time and energy on the time-consuming defrosting of the refrigerator freezer with his own hands.

Problems with the operation of No Frost refrigerators

1. When using this system, the internal volume of the cooled chamber decreases slightly.

2. Due to the constant operation of the fan, the humidity of the air inside the chamber decreases, which threatens to weather the food. However, this can easily be avoided by using special containers or food film to pack products.

3. Insignificant increase of noise when using refrigeration equipment.

4. Increased energy costs due to the need to ensure the operation of the electric motor of the air cooler. However, in the total amount of electricity consumed in an apartment this increase is almost insignificant.

5. Refrigerators of this type are more saturated technical elements, which theoretically can affect their reliability. But this is not necessary.

conclusions

Despite the fact that the system is called No Frost, it is not a complete lack of frost in the refrigerator. It is simply hidden from the eyes of the user and formed behind the back wall on the evaporator. Once or twice a day, the ice is thawed by using a special electric heater, which is located under the evaporator or directly on it. When the temperature reaches a certain level, the compressor turns off and the cooling stops. When you operate refrigerators equipped with this system, you will never have snow in the freezer. So, if you need to purchase refrigeration equipment, you just need to read the contents of this article once again, weigh all the pros and cons of each type of equipment and make a decision that will take into account all your wishes and functional needs. After all, the refrigerator is a technique that will serve faithfully for more than one year.