Understanding exactly how your household appliance functions allows you not only to effectively use its capabilities, but also to significantly extend the service life of the equipment. Refrigerators of the Belarusian brand Atlant, widely distributed in the post-Soviet space, are based on the classic vapor compression scheme, which has proven its reliability and energy efficiency over decades. Despite its apparent simplicity, a complex physical process takes place inside the metal case, requiring precise coordination of all components.
The system is based on the continuous circulation of refrigerant, which, changing its state of aggregation, takes heat from the internal chambers and releases it into the environment. You don't need to be a heating engineer to grasp the basic principles, but knowing the basic mechanics will help you avoid common operating mistakes. Modern models equipped with a system No Frost or inverter motors have their own nuances, but the fundamental principle of heat selection remains unchanged.
Let us consider in detail each stage of this process so that you can better understand the characteristics of your equipment. From the moment the plug is plugged into the socket until the set temperature is maintained, a chain of interconnected events takes place, for which various components of the design are responsible.
The main cooling cycle: from compression to evaporation
The heart of any refrigerator Atlant is the compressor. It is this unit that creates the necessary pressure for the movement of the refrigerant in a closed circuit. When the temperature sensor detects an increase in heat inside the chamber, it sends a signal to start the motor. The compressor compresses the gaseous freon, sharply increasing its temperature and pressure, after which it sends the hot gas to the condenser.
Passing through the condenser coil, usually located on the rear wall or built into the side panels, the refrigerant cools. A critical stage occurs here: the gas gives off heat to the air in the room and condenses, turning into a liquid. Pressure in this part of the system remains high, which allows the substance to remain liquid even when the temperature drops to room temperature.
⚠️ Attention: The rear grille of the condenser during operation can heat up to 50-60 degrees. This is normal operating mode and not a sign of malfunction. Do not cover the back of the refrigerator and provide clearance for ventilation.
Next, the liquid refrigerant enters the capillary tube. This is a very thin copper pipeline that serves as a throttle - a device that sharply reduces pressure. Passing through this narrow section, the liquid partially evaporates and cools sharply, turning into a cold mixture of liquid and vapor. It is in this state that it enters the evaporator.
The role of the evaporator and the distribution of cold
The evaporator is the very element that directly cools the products. In refrigerators Atlant it can be located openly (in old models with a weeping wall) or hidden behind a plastic panel (in No Frost systems). Here the refrigerant boils at low pressure, actively absorbing heat from the internal volume of the chamber.
The heat exchange process depends on the type of cooling system. In static models, cold air falls down naturally, cooling the shelves. In models with forced circulation, a fan drives air through a hidden evaporator, ensuring uniform temperature in all corners of the chamber. Boiling point The freon in this unit can reach minus 20-30 degrees, which allows you to quickly freeze food.
After passing through the evaporator, the refrigerant becomes gas. However, his journey is not yet complete. Before returning to the compressor, it passes through a filter drier, which removes any remaining moisture. This is critically important, since water in the system can freeze in a bottleneck in the capillary and cause a blockage known as an “ice jam.”
Design and functions of the Atlant compressor
Belarusian plant Atlant independently produces compressors that are considered one of the most reliable in their class. Most often, piston units are used, where the movement of the piston is ensured by a crank mechanism. This design is characterized by high maintainability and resistance to voltage surges.
Modern lines are increasingly found inverter compressors. Unlike traditional ones, which operate in an “on-off” mode, inverter motors smoothly regulate the rotation speed. This allows you to maintain the temperature with minimal fluctuations, reduces noise levels and energy consumption. A soft start eliminates peak loads on the network.
How to distinguish an inverter compressor?
Inverter models operate almost silently and do not emit a characteristic click when stopping, since the motor does not turn off completely, but only slows down. The nameplate is often marked Inverter or DC Motor.
An important element of the compressor unit is the start-up relay. It provides voltage to the motor windings at the time of startup and turns off the power when overloaded or overheated. If the refrigerator hums, but does not start, or, conversely, clicks and is silent, the problem most often lies in this component or in the electric motor itself.
Specifics of the No Frost system in Atlant models
System No Frost (or “No Frost”) in refrigerators Atlant implemented according to a scheme that eliminates the need for manual defrosting of the freezer. Moist air from the chambers constantly circulates through a hidden evaporator, where moisture freezes on its ribs, and dry and cold air returns back. The defrost heating element is periodically turned on, which melts the ice on the evaporator, and the water flows into the pan.
- 🌪️ Fan: provides constant circulation of air masses, preventing the formation of zones with different temperatures.
- ❄️ Evaporator: hidden behind the back wall of the freezer, ice forms on it.
- 🔥 Defrost heating element: heating element that is turned on by a timer or compressor counter to defrost the evaporator.
- 💧 Drain system: Discharges melt water into the evaporation tank on the compressor, where it evaporates.
Despite its convenience, the system has its own peculiarities. Due to constant airflow, food can air out faster, therefore storage food requires the use of containers or film. In addition, the presence of additional elements (fan, heating element, timer) increases the number of components that can theoretically fail, although the failure statistics Atlant remains low.
☑️ System check No Frost
Thermoregulation and temperature control
A thermostat (in mechanical models) or an electronic control module is responsible for maintaining the set temperature. A thermostat is a simple mechanical device with a bellows filled with gas or liquid. When the temperature in the chamber changes, the pressure in the bellows changes, which leads to the opening or closing of electrical contacts.
More advanced models Atlant use electronic temperature sensors. They transmit data to the control board, which analyzes the information and makes a decision to turn on the compressor, fan or defrost heating element. Electronics allows you to implement functions such as "Super Freeze", when the compressor operates continuously for a certain time to quickly freeze a large volume of products.
| Component | Function | Location |
|---|---|---|
| Thermostat | Mechanical on/off of the compressor | Inside the chamber or in the control unit |
| Defrost sensor | Evaporator temperature control | On the surface of the evaporator |
| Defrost timer | Cycling cooling and defrosting modes | Rear wall (often near the compressor) |
| Fuse | Protection against overheating of the heating element | In the defrost heater circuit |
The temperature is adjusted using a regulator located inside the refrigerator camera or on the external panel. It is important to understand that the number on the regulator does not always correspond to degrees Celsius, but indicates the cooling intensity. The higher the number, the lower the temperature inside will be.
Refrigerants: R600a and R134a in Atlant technology
Environmental safety and energy efficiency dictate their conditions, and the plant Atlant is actively switching to the use of isobutane (R600a). This refrigerant does not destroy the ozone layer and has excellent refrigeration properties. However, it is a flammable gas, which imposes certain restrictions on repair and disposal.
Older or more powerful models can run on freon R134a. This is an inert gas that does not support combustion, but has a higher operating pressure. Replacing one refrigerant with another is impossible without a major rework of the system, since they require different types of compressor oils and have different heat transfer characteristics.
When refilling the refrigerator, it is important to follow the dosage. In a c R600a e system, the amount of refrigerant is measured in grams (usually 50-60 grams), and even a small error can lead to incorrect operation or increased energy consumption. That is why repairs associated with a violation of the tightness of the circuit should be carried out only by specialists with the appropriate equipment.
Typical problems and their connection with the principle of operation
Knowledge of the device helps diagnose malfunctions. For example, if the refrigerator Atlant freezes but does not turn off, the tightness of the circuit may be broken (freon leakage) or the compressor has lost performance. The compressor tries to compensate for the lack of cold, working without stopping, but does not reach the set temperature.
The formation of a “fur coat” or ice in the refrigerator compartment (in models without No Frost) most often indicates problems with the door seal. Warm, humid air from the room constantly flows inside, the moisture condenses and freezes. In No Frost systems, an ice lump in the freezer may indicate a malfunction of the defrost sensor or timer.
⚠️ Attention: If the compressor runs constantly but there is no cold, and the tubes on the back wall are cold or warm (not hot) - this is a sure sign of a refrigerant leak. Operation in this mode will lead to the motor burning out.
Noisy operation can be caused by vibration of the housing, improper installation (misalignment) or wear of the compressor bearings. Sometimes the humming gets louder if the refrigerator is close to a wall or furniture, creating resonance. Adjusting the legs and installing them on a flat surface often solves the problem of excessive noise.
Frequently asked questions about the design of refrigerators (FAQ)
Why does the Atlant refrigerator make a loud click before starting?
This click is produced by the starting relay, which supplies voltage to the starting winding of the compressor to start the engine. If the clicks are frequent and the startup does not occur, the relay may be faulty or the compressor is “jammed.”
Is it normal that the side walls of the refrigerator are hot?
Yes, this is normal for many modern models. The condenser (heat exchanger) is often built into the side walls of the case, rather than located on the rear grille. They give off heat, which they take from inside the chamber.
How often do you need to defrost the Atlant No Frost refrigerator?
The No Frost system does not require regular defrosting to remove ice. However, once every 6-12 months it is recommended to completely defrost and wash the chambers for hygienic purposes and to clean hard-to-reach places from dust and odors.
Is it possible to transport the Atlant refrigerator lying down?
It is extremely undesirable. When transporting lying down, there is a risk of damage to the tubes and, most importantly, leakage of compressor oil into the refrigerant circuit, which can damage the compressor upon first start-up. If transportation cannot be avoided, let the refrigerator stand upright for at least 4-6 hours before turning it on.
What does a flashing temperature indicator mean?
Flashing usually indicates that the temperature in the chamber has risen above the permissible limit. This can happen immediately after switching on, when loading a large amount of warm food or in the event of a malfunction (the door is not tightly closed, the thermostat is broken).