Modern refrigerators Belarusian brand Atlant have long established themselves as reliable equipment that combines affordable price and functionality. Particularly noteworthy are models with a system No Frostthat relieve users from the need to regularly defrost the chambers manually. Understanding exactly how this mechanism functions will help not only to operate the device correctly, but also to diagnose possible malfunctions in a timely manner.
Unlike classic drip systems, where moisture settles on the back wall and flows into the drainage, in models No Frost the process of moisture removal is organized fundamentally differently. There is no ice on the shelves, and the temperature is distributed evenly throughout the entire volume. Operating principle It is based on the constant circulation of cooled air, which is forced by a fan through a hidden evaporator.
Many owners mistakenly believe that there is no frost at all in such refrigerators. In fact, it is formed, but in a place hidden from view, after which it is automatically removed. It is this cyclical process that makes the equipment convenient for everyday use, keeping food fresh longer and preventing the mixing of odors between compartments.
The design of the hidden evaporator and cooling zone
The heart of the system No Frost in refrigerators Atlant is the evaporator, which is hidden behind the back panel of the freezer or refrigerator compartment. Unlike the open tubes of older models, this one uses a plate heat exchanger. Air from the chambers is sucked in by a special fan and driven through the fins of the evaporator, where it is instantly cooled.
After cooling, the air flow is directed through the air duct system into the work area. Air circulates more intensely in the freezer compartment, ensuring faster freezing. In the refrigerator compartment, the flow is less powerful so as not to freeze the food. It is critical to understand that the air duct dampers regulate the amount of cold supplied, and their jamming can lead to an increase in temperature.
The moisture contained in the food and air settles on the cold fins of the evaporator in the form of frost. Since this element is hidden, the user does not see the growing layer of ice. The defrost mode is periodically turned on, and the formed ice turns into water, which flows into the pan. Thus, the inside of the chambers is always dry and clean.
Why can ice appear in the Atlant freezer?
If you notice ice on the floor of the freezer or on the door, this is not always a breakdown. Often the reason is a loosely closed door or prolonged opening, when moist air has time to penetrate inside and freeze before the defrost cycle begins.
Automatic defrost cycle: how ice is removed
The system automatic defrosting in technology Atlant is controlled by an electronic module or mechanical timer, depending on the series of the refrigerator. The operating algorithm is simple: after a certain number of hours of compressor operation or based on a sensor signal, the system goes into defrost mode. At this moment, the compressor and fan stop.
The (tubular electric heater) located directly under the evaporator or built into it comes into operation. It heats the fins of the heat exchanger, melting the accumulated frost. The resulting water flows down the groove into the drainage tube and enters a container located above the compressor. Defrost heating element (tubular electric heater) located directly below the evaporator or built into it. It heats the fins of the heat exchanger, melting the accumulated frost. The resulting water flows down the groove into the drainage tube and enters a container located above the compressor.
⚠️ Attention: If you hear gurgling or noise of water inside the refrigerator immediately after turning it on or off, this is normal. This is how melt water flows into the drainage system. However, constant noise may indicate problems with drainage.
The defrosting process does not last long, usually from 15 to 30 minutes. As soon as the defrost sensor detects that all the ice has melted and the evaporator temperature has risen above zero, the heating element turns off. The compressor then starts again and the refrigeration cycle resumes. This frequency prevents the system from becoming coated with a thick layer of ice, which could block ventilation.
The role of the fan and air circulation system
The key element to ensure the absence of ice is fan. In refrigerators Atlant it is usually located at the top of the freezer or behind the back panel. Its task is to create the pressure necessary to pump air through the dense fins of the evaporator. Without a working fan, the cold simply will not get into the chambers.
The air distribution system can be single-circuit or double-circuit. In simpler models, cold air from the freezer is partially supplied to the refrigerator compartment. Advanced versions use separate fans and dampers for each zone, which allows you to set independent temperature.
- 🌀 The fan operates only while the compressor is running, providing active cooling.
- 🛑 When opening the door, the fan often stops so as not to blow cold out and save engine life.
- 🌬️ The direction of flow is regulated by plastic dampers, the position of which depends on the set temperature.
If the fan fails or frozen ice interferes with its blades, circulation stops. As a result, the food stops cooling, although the compressor can run without interruption. In some models Atlant if the fan malfunctions, a characteristic humming or howling sound may be heard.
Temperature control and electronics
The control unit is responsible for coordinating all processes in the refrigerator. Atlant . It reads readings from several thermal sensors: one controls the air temperature in the chamber, another controls the temperature of the evaporator, the third can monitor the temperature in the freshness zone. Based on this data, a decision is made to turn on the compressor, fan or heating element.
In models with electronic control, the setting is made through the display on the door. The user sets the desired parameters, and the “brains” of the refrigerator themselves decide how long to keep the compressor on. Mechanical regulators work more simply, relying on the operating time of the compressor, but they are less accurate.
It is important to note the operation cooling channel dampers. This is a mechanical or solenoid valve that opens or closes the flow of cold air from the freezer to the refrigerator compartment. If the damper is stuck in the closed position, the upper chamber will become warm. If open, the products may freeze.
| Component | Function | Malfunction symptom |
|---|---|---|
| defrost heating element | Ice melting on the evaporator | Increasing “fur coat”, lack of cold |
| Defrost sensor | Turning off the heating element after the ice melts | Excessive energy consumption, overheating evaporator |
| Fan | Air circulation | Noise, lack of cooling when the compressor is running |
| Damper | Adjusting the flow into the refrigeration room camera | Freezing of food or rising temperature |
Typical problems of the No Frost system in Atlanta
Despite its reliability, the system No Frost may malfunction. One of the most common problems is malfunction of the defrost system. If the heating element burns out or the timer sticks, the evaporator becomes covered with ice. The fan stops spinning, resting its blades on the ice crust, and the cold stops flowing into the chambers.
Another common reason is clogging drainage hole. If the melt water does not have time to leave, it freezes in the groove, forming an ice plug. Water begins to accumulate at the bottom of the freezer and leak out onto the kitchen floor. This is often solved by cleaning the channel with warm water or a special flexible brush.
⚠️ Attention: The use of sharp objects (knives, screwdrivers) to chip ice inside the chambers is strictly prohibited. One careless movement can damage the evaporator or wiring, which will lead to freon leakage and costly repairs.
It is also worth mentioning the wear of the door seals. If the rubber has lost its elasticity and does not fit tightly, warm, moist air constantly enters the chamber. The system No Frost does not have time to remove such a volume of moisture, and the refrigerator begins to wear out, becoming covered with frost faster than the defrost cycle completes.
☑️ Diagnosis of cooling problems
Operation rules to extend service life
In order for the refrigerator Atlant to serve for a long time, it is important to follow the operating rules. Do not place hot foods in the chamber - this creates a huge load on the moisture removal system. It is also not recommended to store open liquids, which actively evaporate and accelerate the formation of ice.
Regularly check the cleanliness of the condenser (the grille at the back of the refrigerator). If it is covered with a layer of dust, heat exchange is disrupted, the compressor runs longer, and the efficiency of the entire system No Frost falls. It is enough to vacuum the back wall of the device once every six months.
Be careful when moving or transporting. The evaporator tubes and ventilation ducts are quite fragile. After transportation, the refrigerator should be allowed to stand upright for several hours before turning on, so that the oil in the compressor flows into the crankcase.
FAQ: Frequently asked questions
Is it necessary defrost the Atlant No Frost refrigerator?
Full defrosting with unplugging is rarely required, about once a year, for general cleaning and disinfection. The No Frost system itself removes the bulk of moisture, but dust and odors can accumulate.
Why does the refrigerator hum or make sounds?
In addition to the operation of the compressor, sounds can be made by the circulating refrigerant (gurgling) or cracking of plastic when the temperature changes. If the fan is humming, it may require lubrication or bearing replacement.
Is it possible to disable the No Frost function?
In most models Atlant this function is a design feature and cannot be disabled separately. You can only change the temperature regime, but the principle of air circulation will remain the same.
What to do if ice has built up in the freezer?
Most likely, the defrost cycle is broken. Check if the door is tightly closed. If the ice crust is thick, the refrigerator needs to be defrosted completely (at least 24 hours) and the operation of the heating element and sensors checked.
How often do you change the filter in such refrigerators?
In classic models Atlant with the No Frost system, replaceable carbon filters for air purification are usually not provided for in the design. Ventilation occurs due to frequent air exchange when opening the doors and natural filtration through the evaporator.