A two-chamber refrigerator Atlant is a complex climate system that ensures the safety of food by maintaining a strictly specified temperature in isolated compartments. Unlike older single-compartment models, the freezer compartment is separate from the refrigerator compartment, allowing independent adjustment of cooling settings and preventing odors from mixing. Understanding exactly how this unit functions helps the user not only to operate it correctly, but also to promptly diagnose emerging malfunctions.
The basis of operation is a closed refrigeration circuit filled with refrigerant, which circulates through the system under pressure. The movement of the working substance is ensured by the compressor, which acts as the “heart” of the entire mechanism. Cooling cycle Starts instantly after turning on the device and continues until the sensors record the achievement of the specified temperature values inside the chambers.
Modern models of the brand are often equipped with additional systems, such as No Frost or Frost Free, which radically change the cold distribution algorithm. If in classic models moisture condenses on the back wall, then in improved versions it is removed outside the internal volume. It is necessary to understand the nuances of the operation of each unit in order to avoid critical errors when loading food or defrosting.
Design and role of the compressor in the system
The main element that creates the necessary pressure for freon circulation is the compressor. Refrigerators Atlant most often use sealed piston units that operate on the principle of reciprocating motion. When you turn on the appliance, an electric current starts the motor, which begins to compress the refrigerant gas coming from the evaporator and pump it into the condenser.
The compression process is accompanied by a significant increase in the temperature of the gas, which is why the back grill of the refrigerator is usually hot. Motor-compressor does not work constantly, but cyclically: it turns on when the temperature in the chambers rises above the set threshold, and turns off based on a signal from the thermostat. In two-chamber models, a control system is often used that allows the compressor to work on different cooling circuits or to use one common evaporator with a damper system.
The reliability of this unit directly affects the service life of the entire device. Modern inverter modifications allow you to change the speed of rotation of the motor shaft, which reduces noise levels and saves energy. However, most standard models Atlant still have classic linear compressors, which require time to reach operating mode after a shutdown.
⚠️ Attention: If after a power outage you hear a loud hum, but no cold appears, do not try to immediately restart the unit. The compressor needs time (from 5 to 10 minutes) to equalize the pressure in the system, otherwise water hammer and failure of the unit is possible.
To protect the engine from overheating, a start-protection relay is built into the design. This small element controls the current strength and temperature of the windings. If the relay detects an overload, it opens the circuit, preventing the motor from burning out. It is this component that often causes clicks when trying to start if there are voltage surges in the network.
Circulation refrigerant and heat exchange
After leaving the compressor, freon heated under high pressure is sent to the condenser. This element is a coil located on the rear or side wall of the housing. The purpose of a capacitor is to transfer heat to the environment. Passing through the tubes, the gas cools and turns into a liquid state, while maintaining high pressure.
Next, the liquid refrigerant passes through a filter-drier, where any remaining moisture that can cause blockage of the capillary tube is removed from it. The flow then enters a capillary tube, a very narrow channel where the pressure drops sharply. As a result of this pressure difference, the refrigerant boils even at low temperatures and enters the evaporator.
- ❄️ Evaporator is the place where heat is directly absorbed from the internal volume of the chambers; here the freon boils and turns into steam.
- 🌡️ Capillary tube —performs the function of a choke, separating the high and low pressure zones in the circuit.
- 💨 Condenser —an external heat exchanger that transfers heat to the room.
Two-chamber refrigerators Atlant often use one evaporator located in the freezer, or two separate circuits. In models with one evaporator, the cold from the freezer is transferred to the refrigerator compartment through special channels and dampers. This scheme is called Full No Frost or simply No Frostif fans are present in both compartments.
After the evaporator, already in the form of a low pressure gas, the refrigerant is again sucked in by the compressor, and the cycle repeats. The effectiveness of this process depends on the tightness of the circuit and the quality of the thermal insulation of the housing. Any gas leak leads to the compressor working non-stop, trying to compensate for the loss of cold, but not achieving the desired result.
No Frost system and air distribution
One of the key features of many models Atlant is the forced air circulation system, known as No Frost. Unlike static cooling, where the cold falls down naturally, here a special fan is responsible for the movement of air masses. It is installed behind the back panel of the freezer or refrigerator compartment.
The principle of operation is that the fan drives air through a hidden evaporator, where it is instantly cooled and dried. Then the cold flows through the air duct system are evenly distributed across all shelves. This allows you to avoid the formation of an “ice coat” on the products and walls, since the moisture does not have time to condense, but freezes out on the evaporator.
| Parameter | Static system (Drip) | No Frost system |
|---|---|---|
| Education frost | On the back wall | On the hidden evaporator |
| Humidity | High (products dry more slowly) | Low (products require packaging) |
| Temperature difference | Up to 5-7 degrees between shelves | Minimum (1-2 degrees) |
| Necessity of defrosting | Regular (1-2 times a year) | Only when dirty (once a year) |
Periodically, based on a signal from a timer or thermostat, the heating element (heating element) located under the evaporator is turned on. It melts the accumulated ice, and the water flows into a special tray, from where it evaporates naturally. This process is called a defrost cycle. In two-chamber models Atlant with the system Frost Free defrosting occurs only in the freezer compartment, and the “crying” wall is retained in the refrigerator.
It is important to understand that the system No Frost makes the air inside the chambers drier. This helps store meats and frozen foods better, but can have a negative effect on fresh vegetables and herbs if they are not packaged. Therefore, manufacturers recommend using airtight containers or cling film.
Why does warm air sometimes blow?
In No Frost models, the defrost mode is turned on every few hours. At this point, the fan may stop, and air at room temperature may briefly flow from the air ducts. This is a normal situation that does not require repair.
Temperature management and thermoregulation
The thermoregulation system is responsible for maintaining a stable microclimate. Depending on the generation of the refrigerator Atlant, this can be a mechanical thermostat or an electronic control unit with sensors. A mechanical thermostat is a device with a bellows filled with gas or liquid, which responds to changes in temperature inside the chamber.
When the temperature rises above the set point, the bellows expands and closes the electrical contacts, starting the compressor. When the lower limit is reached, the reverse process occurs - the contacts open and the motor stops. Adjustment is carried out by turning the knob, usually located inside the refrigerator compartment or on the front panel.
- 🎛️ Mechanical thermostat - reliable, easy to replace, but has less accuracy of settings.
- 💻 Electronic module - allows you to set the temperature with an accuracy of a degree, often has a display.
- 📡 NTC sensors —in electronic models there can be several of them (in each chamber, on the evaporator, in the freshness zone).
In modern models with electronic control, all processes are coordinated by the main controller. It reads readings from all sensors and makes a decision to turn on the compressor, fan or defrost heating element. The user only sees the result on a digital display, but complex logical data processing takes place inside.
Incorrect settings of the thermostat can lead to serious consequences. If you set the temperature too low, the compressor will work almost non-stop, which will lead to overheating and increased energy consumption. Too high a temperature will create a favorable environment for the growth of bacteria.
⚠️ Attention: Do not set the thermostat to maximum cooling (usually number 6 or 7) in the summer unless absolutely necessary. This forces the compressor to work at the limit of its capabilities, reducing its resource.
Features of the freezer compartment
The freezer compartment in a two-chamber refrigerator Atlant can be located both at the top and at the bottom. Regardless of location, it operates in temperatures ranging from -6 to -24 degrees Celsius. The main difference from the refrigerator compartment is a more intensive freezing mode and the absence of plus zones.
In models with the system No Frost the freezer is often equipped with its own fan, which ensures rapid heat removal from products when they are loaded. The “Super Freeze” function, activated by a button on the control panel, forcibly turns on the compressor for a long period, ignoring the thermostat's shutdown signals.
The insulation of the freezer compartment is reinforced, which allows you to maintain a low temperature even during a long power outage. The door is equipped with a more powerful seal, often with magnetic tape around the entire perimeter, to prevent the leakage of warm air. Violation of the tightness of the door in this compartment leads to rapid accumulation of ice and spoilage of food.
☑️ Checking the freezer compartment
If your model has a bottom freezer, it is important to keep the drainage hole clean, which can become clogged with crumbs or ice. In some designs, the outflow of water during defrosting occurs precisely through a channel passing through the refrigerator compartment to the outside. Clogging of this path will lead to the formation of an ice plug and flooding of the lower cell.
Typical problems and their connection with the device
Knowledge of the principles of operation helps to quickly identify breakdowns. For example, if the refrigerator Atlant hums but does not cool, most likely the problem lies in a freon leak or a clogged capillary tube. In this case, the compressor works constantly, trying to build up pressure, but the refrigerant does not circulate through the system.
The appearance of a large amount of water on the floor often indicates a malfunction of the condensate drainage system. In drip systems, the drainage hole in the back wall becomes clogged. In models No Frost water may leak due to a breakdown of the defrost heating element or defrost sensor, when ice completely blocks the air ducts and melt water does not go into the pan.
Uneven cooling, when it is warm on the upper shelves and cold below, indicates a violation of air circulation. In systems No Frost this may be caused by a broken fan or frozen air ducts due to a loose door. In static models, this may be a sign of a lack of refrigerant.
Why does the Atlant refrigerator make clicks?
Clicks during operation are most often the sound of the compressor or thermostat starting relay operating. This is a normal operating sound for mechanical control systems. However, frequent clicks without starting the engine may indicate a faulty start relay or low voltage in the network.
Is it possible to transport the Atlant refrigerator lying down?
Transportation in a lying position is not recommended, since oil from the compressor may leak into the refrigerant circuit. If transportation cannot be avoided, the unit should only be laid on the side opposite to the location of the compressor tubes, and allowed to stand vertically for at least 4-6 hours before turning on.
How often do you need to defrost a two-chamber Atlant?
Models with the No Frost system require defrosting only for hygienic cleaning, about once a year. Models with a drip system (“crying wall”) in the refrigerator compartment and manual defrosting of the freezer must be defrosted every 6 months or when a layer of ice more than 5 mm thick is formed.