Refrigerators of the Belarusian brand Atlant are deservedly popular in the post-Soviet space due to their reliability and affordable cost. A special place in the model range is occupied by units equipped one compressor, which differ from two-compressor analogues in the features of cold distribution. Owners need to understand exactly how such a system works for proper operation and timely detection of malfunctions.
Unlike more expensive models, where a separate motor is responsible for each chamber, here the entire temperature control process is tied to one power unit. Refrigerant circulation occurs sequentially or through a system of solenoid valves, which imposes its own limitations and provides certain advantages. In this material, we will analyze in detail the internal mechanics of the process so that you can better navigate the operation of your equipment.
The main task of the entire system is to extract heat from the internal volume of the chambers and transfer it to the environment through the condenser coil. This process in units Atlant is strictly regulated thermostat, which starts and stops the compressor. It is important to understand that even with one “moving” part, the cooling capacity is distributed correctly, ensuring the safety of products.
Basics of a single-circuit system
The heart of any refrigerator, including model Atlantis compressor. In single-circuit systems, this element is responsible for pumping refrigerant through a single closed circle. Gaseous freon is sucked in by a compressor, compressed to high pressure and temperature, and then sent to a condenser, usually located on the rear wall of the housing.
Passing through the condenser, the substance gives off heat and condenses into a liquid. Next, the flow passes through a filter drier and capillary tubewhere the pressure drops sharply, which leads to instant evaporation and heat absorption in the evaporators of the chambers. It is this physical law that underlies the operation of the entire system.
The main design feature is that the evaporator is often located in the freezer compartment, and the cooling of the refrigeration compartment occurs due to natural or forced convection air. Cold air from the freezer falls down or is supplied by a fan to the main chamber.
⚠️ Attention: In single-circuit systems, the temperature in the freezer and refrigerator compartments is interconnected. If you set the temperature in the freezer too low, the refrigerator compartment will also become colder, and vice versa.
Can be used to control refrigerant flows in more modern models. Atlant can be used solenoid valves. They allow you to shut off the freon supply to one of the chambers when the desired temperature is reached there, while the compressor continues to work in another zone.
The cooling cycle and cold distribution
The cooling process in refrigerators Atlant with one compressor occurs cyclically. When the thermostat detects an increase in temperature above a preset threshold, it sends a signal to start the engine. Refrigerant starts moving, taking heat from the evaporator of the freezer.
In models without the No Frost system, the main chamber is cooled through partition or channels through which cold air falls down by gravity. In systems with No Frost a fan operates, which forces air through the evaporator hidden behind the back wall, distributing it across both compartments.
The efficiency of distribution depends on the tightness of the doors and the filling of the chambers with products. If the air channels are blocked by bags or containers circulation is disrupted, which leads to uneven cooling and increased load on the compressor.
- ❄️ Cold air always tends downwards, so the lower shelves of the refrigerator are colder top.
- 💨 In No Frost systems, the fan turns on periodically, creating a characteristic operating noise.
- 🌡️ The thermostat usually controls the temperature in the refrigerator compartment, and the freezer operates “under load.”
It is important to note that in some modifications Atlant the possibility of independent adjustment temperature has been implemented, but physically the circuit remains common. This is achieved by changing the operating time of the valves that redirect freon.
The role of the thermostat and start relay
The key control element in a circuit with one compressor is thermostat (thermostat). It is this device that makes the decision to turn the motor on or off. It measures the temperature in the evaporator or in the air of the chamber and closes the electrical circuit when heated.
At the moment the compressor starts, starting relayplays a critical role. It supplies increased current to the motor windings to start the rotor, and then turns off the starting winding. Refrigerators Atlant often use reliable posistor or electromagnetic relays.
If the thermostat fails, the compressor may either not turn on at all or work without stopping, which leads to freezing of food and damage to the motor. Replacing this element requires precise adjustment or installation of an analogue with identical parameters.
⚠️ Attention: Replacing a thermostat or relay yourself without electrical skills is dangerous. Incorrect connection can lead to a short circuit or failure of the compressor.
Also present in the control circuit thermal protection relay, which opens the circuit when the compressor overheats. This saves an expensive motor from burning out during power surges or prolonged operation in extreme conditions.
Comparison with two-compressor models
To better understand the specifics of the operation of a single-circuit Atlanta, it is worth comparing it with more complex analogues. The main difference lies in the autonomy of the cameras. In two-compressor models, each circuit operates independently, which gives more flexibility in settings.
However, the model with one motor has its undeniable advantages, the main of which are energy efficiency lower noise levels. One powerful compressor often operates quieter than two medium ones, and the absence of a second circuit reduces energy consumption.
Let's look at the main differences in the table:
| Parameter | One compressor | Two compressors |
|---|---|---|
| Independence of chambers | Partial or absent | Full |
| Energy consumption | Less (one motor) | Higher (two motors) |
| Noise level | Lower | Higher (total) |
| Repair cost | Cheaper | More expensive |
Despite their apparent simplicity, modern single-circuit systems Atlant are equipped with electronics that minimize design flaws. Control algorithms allow you to optimize operation, preventing excessive freezing.
Typical malfunctions and their causes
During operation, owners may encounter a number of problems that are specific to a circuit with one compressor. Most often it occurs insufficient cooling in the upper chamber during normal operation of the freezer. This may indicate a clogged capillary system or a freon leak.
Another common problem is constant operation of the compressor. If the refrigerator hums continuously, but does not gain temperature, the thermostat may have failed, the door seal is broken, or there is a refrigerant leak. In the latter case, the motor tries to compensate for the lack of cold by constant operation.
- 🔇 The compressor does not turn on: there is a problem with the start relay, thermostat or wiring.
- 💧 Puddle under the refrigerator: the drain hole is clogged or leaking due to defrosting.
- ❄️ “Fur coat” in the freezer: a loose door or a malfunction of the defrosting heating element (in No Frost).
It is important to respond in a timely manner to changes in the sound of the unit. The appearance of metallic knocking or a loud hum may indicate mechanical wear of the compressor or the entry of foreign objects into the fan area.
Why is the compressor hot?
The compressor heats up during operation 60-80 degrees Celsius is normal. You should sound the alarm if it is red-hot or has a burning smell.
Recommendations for operation and maintenance
To extend the service life of your Atlanta it is necessary to follow a number of rules. First of all, this concerns ventilation. The back wall of the refrigerator must be at least 5-7 cm from the wall so that the heat from the condenser is effectively dissipated.
Regular defrosting (for models without No Frost) should be carried out as an ice crust forms more than 5 mm thick. Ignoring this rule causes the compressor to work longer, increasing energy consumption and wear of parts.
Do not place hot products in the chamber. A sharp rise in temperature causes the system to operate in extreme mode, which can lead to overload of the engine. Allow the food to cool to room temperature before storing. deformation of plastic elements and engine overload. Allow food to cool to room temperature before serving.
☑️ Monthly check-up of the refrigerator
⚠️ Attention: Manufacturers may make changes to the design and operating algorithms of the equipment. Always check the official instructions for your specific model Atlant to obtain accurate maintenance data.
Frequently asked questions (FAQ)
Is it possible to turn off the refrigeration system in an Atlant refrigerator with one compressor? chamber?
In most classic single-circuit models Atlant completely turn off the refrigerator compartment, leaving the freezer running impossible. The "Vacation" function or independent control is available only in models with two compressors or, in rare cases, with electronic valve control, but physically there is only one circuit.
Why is it too cold in the refrigerator compartment, but normal in the freezer?
This often happens if the damper that regulates the flow of cold air from the freezer does not close completely or is stuck. Also, the cause may be a malfunction of the thermostat, which “thinks” that the chamber is warm and keeps the compressor on.
How long should the compressor rest between starts?
In normal operation, the cycle is approximately: 10-20 minutes of operation and 15-30 minutes rest. If the refrigerator turns on every 2-3 minutes or runs for an hour without a break, this is a sign of a malfunction (freon leakage, wear of the seal, thermostat failure).
Is it possible to replace the compressor in a single-circuit refrigerator with a double-circuit one?
Theoretically, this is possible, but technically impractical and difficult. It will be necessary to digest the pipe system, change evaporators, lay new lines and redo the electrical circuit. It’s easier and cheaper to buy a new refrigerator.