Understanding Knowing exactly how your appliance functions is often the key to extending its life and maintaining it properly. Refrigerators of the Belarusian brand Atlant have held leading positions in the market for several decades due to their reliability and maintainability. Unlike many Western analogues, they have a more predictable and simpler design, which allows owners to more easily diagnose faults.
The process of generating cold in these units is based on the physical principle of changing the state of the refrigerant when the pressure changes. When freon changes from a liquid to a gaseous state, it actively absorbs heat from the environment. It is this physical law that underlies the operation of compressor the entire circulation system. Without a clear understanding of this cycle, it is impossible to imagine why the temperature inside the chamber remains below zero.
In this article we will analyze in detail each stage of the refrigerant passing through the circuit. We will look at the difference between the classic system with a crying evaporator and more modern technology No Frost, which is also being actively implemented by the manufacturer. Knowledge of these nuances will help you avoid common operating mistakes.
Fundamentals of thermodynamics in household refrigerators
The foundation of the operation of any refrigeration equipment, including products Atlantis a closed circuit filled with refrigerant. The most commonly used freon is R134a or R600a (isobutane), which have the necessary thermodynamic properties. The key element here is the compressor, which is often called the “heart” of the unit. It creates a pressure difference, forcing the refrigerant to move through the system.
It is important to understand that cold is not produced, but transferred. Heat is taken from the internal volume of the chamber and thrown out through a heat exchanger on the rear wall. This process is continuous until the thermostat or electronic control unit registers the achievement of the set temperature. The cycle of compression and expansion is repeated hundreds of times a day.
The cooling efficiency directly depends on the tightness of the system. If even a microscopic hole appears in the circuit, the freon evaporates and the heat transfer process stops. That is why tightness of the circuit is a critical parameter, the violation of which requires the intervention of a master with professional equipment.
- ❄️ The compressor compresses gaseous freon, increasing its temperature and pressure.
- 🌡️ In In the condenser, the hot gas cools down and turns into a liquid state.
- 💧 Through the capillary tube, the liquid expands sharply, turning into cold fog.
- 🌀 In the evaporator, the refrigerant boils, taking heat from the products.
It is worth noting that in different models Atlant compressors of different designs can be used. There are both classic piston models and more modern linear inverter motors. The latter are quieter and consume less electricity, but their principle of influence on the refrigerant remains unchanged.
The path of the refrigerant: from the compressor to the evaporator
Let's trace the full circulation cycle to understand how the chamber is cooled. After leaving the compressor, freon is under high pressure and has a high temperature. It goes into the condenser - this is the same grille that you see on the back wall of most models. Here there is an active release of heat into the surrounding air.
⚠️ Attention: Never install the refrigerator Atlant tight to the wall. A minimum gap of 5-7 cm is necessary for free convection of air around the condenser. Violation of this rule leads to overheating of the system and an increase in energy consumption.
The cooled and high-pressure liquid freon is directed into the capillary tube. This is a very thin copper coil that serves as a choke. As the refrigerant passes through it, it experiences a sharp drop in pressure. It is at this moment that its strongest cooling occurs. The temperature drops to the values required for freezing.
Next, the cold mixture of liquid and gas enters the evaporator. In classic models, it is located inside the body, often hidden behind the back panel of the freezer or has a ribbed surface. Here freon boils at low pressure, actively absorbing heat from the evaporator walls. The walls, in turn, cool the air inside the chamber.
After the evaporator, freon again becomes a gas, but cold and with low pressure. It passes through a filter drier before being returned to the compressor. This element is necessary to remove moisture and microparticles that could enter the system. Then the cycle is repeated again.
In models with two compressors, which are often found in the lines Atlant, this process occurs independently for the refrigeration and freezer compartments. This allows you to more accurately regulate the temperature and save energy, since one motor can be turned off while the second is running.
Differences between the drip system and No Frost
Although the physical principle of the compressor is the same, the methods of distributing cold and combating ice in refrigerators Atlant can differ radically. This divides all models into two large groups: with a “crying” system and with technology No Frost (or Full No Frost). Understanding the difference is important for proper care.
In a drip system (or “crying evaporator”), the cooling element is located on the back wall of the refrigerator compartment. During operation, frost forms on it. Periodically, the compressor turns off, the wall heats up, and the frost melts, flowing in droplets into a special groove. From there, the water goes through a drainage tube into a container above the compressor, where it evaporates.
The system No Frost (literally “without frost”) works differently. Here the evaporator is hidden, usually in the freezer or behind a special partition. Cooling occurs not from the walls, but due to forced air circulation. The fan drives air through the cold evaporator and distributes it throughout the entire volume of the chambers through a system of channels.
The key advantage No Frost is the absence of the need for manual defrosting and uniform temperature throughout the entire volume. However, the presence of a fan creates additional noise, and the flow of dry air can dry out food faster if it is not packaged. In the drip system, the humidity is higher, which is better for vegetables, but requires regular defrosting.
| Parameter | Drip system | No Frost | Full No Frost |
|---|---|---|---|
| Evaporator location | Rear wall of the refrigerator compartment | Freezer camera | Hidden (separate circuit) |
| Air circulation | Natural convection | Forced (fan) | Forced in both chambers |
| Humidity | High (products dry more slowly) | Low (packaging required) | Low |
| Care | Defrosting 1-2 times a year | Not required | Not required |
The role of the thermostat and automation
To prevent the refrigerator from turning into a glacier or, conversely, defrosting, a control element is needed. In classic models Atlant this function is performed by a mechanical thermostat. This is a device with a capillary tube, the end of which is fixed to the evaporator. The tube is filled with a temperature-sensitive gas or liquid.
When the evaporator temperature drops to the set value, the pressure in the tube decreases and the thermostat contacts open. The compressor stops. At this moment, the temperature in the chamber begins to slowly rise. As soon as it reaches the upper threshold, the contacts close again and the cooling cycle resumes.
In more modern models, the mechanics are replaced by an electronic control unit. It reads readings from temperature sensors (thermistors) located at different points in the chamber. Electronics allow you to implement complex algorithms, for example, the “Vacation” mode or quick freezing, and also provides more accurate temperature maintenance with an error of less than 1 degree.
Why does the refrigerator turn on more often at night?
This may be due to the room temperature. If the room gets cooler at night, the heat exchange of the condenser is reduced and the compressor has to work longer to maintain the temperature. Also, the cause may be a door that is not tightly closed or loading warm products.
Faulty thermostat is one of the most common causes of problems. If it “sticks” in the “on” position, the refrigerator will work without interruption, forming ice. If the contacts do not close, the unit will stop cooling. Replacing this element in models Atlant usually is not difficult and does not require evacuation of the system, since the sensor is located outside the circuit.
Typical problems of the cooling system
Even reliable equipment Atlant is not immune from breakdowns. Knowing the symptoms will help you understand the severity of the situation. Most often, users encounter the formation of a “coat” - a thick layer of ice. In drip systems, this may be a sign of a loose door fit or a malfunction of the thermostat, which does not allow the unit to “rest.”
If the refrigerator hums, but does not cool, and gurgling or hissing is heard, this is a sure sign of a freon leak. In this case, the compressor runs idle. Leakage may occur due to corrosion of the evaporator (especially if it was cleaned with sharp objects) or microcracks in the seals.
⚠️ Attention: If you find that the refrigerator has stopped freezing, do not try pick the ice with a knife or other sharp objects. In models Atlant the evaporator is often built into the housing, and its breakdown will lead to failure of the entire unit and expensive repairs.
Another common problem is clogging of the capillary tube. This may occur due to poor quality oil or moisture in the system. The symptoms are similar to a leak: the compressor works constantly, but there is no cold, and the condenser (grid at the back) remains only partially cold or warm.
☑️ Diagnosis of the malfunction
Operating rules for long service life
To ensure that the cooling system operates for as long as possible, It is enough to follow a few simple rules. Firstly, do not put hot food into the chamber. This places extreme stress on the compressor and leads to the formation of excess condensation and ice. Let the dishes cool to room temperature.
Secondly, keep the condenser clean. Dust, animal hair and fluff settle on the rear grille and act as a heat insulator. It becomes more difficult for the compressor to cool the freon, it overheats and can burn out. It is recommended to carefully vacuum the back wall once every six months.
Thirdly, do not block the air ducts. In models with No Frost cold air should circulate freely. If you clog the holes in the back wall or under the ceiling of the chamber with food, the temperature will be distributed unevenly and the compressor will work without stopping.
Finally, check the rubber seals on the doors. If they are worn out or dirty, warm, moist air constantly enters the chamber. This leads to freezing and increased load on the motor. A simple check with a piece of paper (it should be tightly clamped by the door) will help identify the problem.
Conclusion and main conclusions
Refrigerators Atlant are a classic example of reliable technology with a clear principle of operation. Understanding how refrigerant circulates through the system helps the user not only to operate the device correctly, but also to notice the first signs of malfunction in time. Whether it is a simple drip system or a modern one No Frost, the physics of the process remains unchanged.
Regular maintenance, consisting of cleaning dust and monitoring tightness, can extend the life of the unit for many years. Do not ignore strange sounds or changes in operating mode - they are often the first signals that the system requires attention.
Remember that even the most reliable equipment requires careful handling. Maintaining the temperature conditions in the room where the refrigerator is located and correctly loading the chambers with food is the key to stable cold in your kitchen.
Why does the Atlant refrigerator hum a lot during operation?
The hum can be caused by several reasons: improper installation (the legs are not adjusted, vibration is transmitted to the floor), contact of the tubes with the body or wall, or wear of the bearings compressor. If the hum appears suddenly and becomes very strong, the compressor may need to be replaced.
How often do you need to defrost a refrigerator with a drip system?
Models Atlant with a drip system require complete defrosting about 1-2 times a year, or when the layer of ice on the back wall becomes noticeable (more than 5 mm). Frequent defrosting is not required, since the system itself removes melt water.
Is it possible to transport the Atlant refrigerator lying down?
The manufacturer does not recommend transportation lying down, since oil from the compressor may leak into the cooling circuit, which will lead to blockage. If transportation cannot be avoided, you can only lay it on its side (opposite to the outlet of the tubes) and after transportation, let it stand vertically for at least 4-6 hours before turning it on.
What to do if it is too cold in the refrigerator?
Check the position of the temperature regulator. If it is at maximum, reduce power. If the problem cannot be solved, the thermostat may be faulty (does not open the contacts) or the air supply damper is stuck (in models with No Frost).