When choosing new household appliances for the kitchen or when diagnosing a malfunction of an old unit, one of the first questions that arises is the number of compressors. Compressor is the heart of any refrigeration unit, and the efficiency of the entire device depends on its quantity and power. In the line of the Belarusian manufacturer Atlant you can find both classic models with one motor and more modern solutions with two independent circuits.
Understanding how many compressors are installed in your particular case is necessary not only for assessing energy consumption, but also for proper maintenance. Atlant refrigerators are famous for their reliability, however, the design features of different series require an individual approach to operation. If you are planning a purchase or are faced with a breakdown, it is important to immediately determine the type of cooling system.
In this article we will look in detail at how different models are designed, what are their fundamental differences and what you should pay attention to during operation. Knowledge of the device your unit will help extend its service life and avoid common errors.
Design features of Atlant refrigerators
Belarusian plant Atlant has been producing equipment for several decades, and during this time technology has changed significantly. Historically, the classic models, familiar to many from Soviet times, were equipped with one compressor. Single-compressor system assumes that one motor pumps refrigerant through both circuits: the freezer compartment and the refrigerator compartment. This is a time-tested scheme that is simple and maintainable.
With the development of technology and increasing energy efficiency requirements, models with two compressors have appeared. In such units independent circuits they allow each chamber to be cooled separately. This means that the motor responsible for the freezer turns on only when it is necessary to lower the temperature there, without affecting the refrigerator compartment. A similar scheme is more often found in models with a system No Frost or in large premium two-chamber refrigerators.
⚠️ Attention: Do not try to open the compressor casing yourself or disconnect the tubes without pumping out the freon. Violation of the tightness of the system will lead to irreversible damage and will require expensive refueling.
You can visually determine the number of motors by looking at the back wall of the unit. If you see one black barrel at the bottom, you have a classic model. If there are two of them, located next to or above each other, then you have a more complex system with separate controls. Also, information can always be found in technical data sheet or on a sticker with characteristics.
Single-compressor models: operating principle and nuances
Most budget and mid-budget models Atlant are equipped with one compressor. The principle of their operation is to alternately cool the chambers. Thermostat or the electronic control unit directs the flow of refrigerant first into one chamber, then, when the specified parameters are reached, switches the valves to another. This process occurs automatically and unnoticed by the user if the system is working properly.
The main advantage of this scheme is lower energy consumption in terms of the cost of the unit itself and its maintenance. Repair of single-compressor refrigerators it is cheaper, since there are more spare parts on the market, and the design is simpler. However, there is also a downside: if the compressor malfunctions, both chambers stop working at once.
It is important to understand that in such models a system is often implemented where the cold from the freezer is transferred to the refrigeration compartment. This can lead to the formation of ice in the upper chamber if you do not monitor the tightness of the seals. Atlant models with one motor require periodic defrosting if they are not equipped with a drip-type automatic defrosting system.
Why does one compressor make more noise?
Single compressor models may seem noisier as the motor works at full power to cool both circuits. Two-compressor systems distribute the load, and each motor runs quieter and less often.
Two-compressor systems: independence and efficiency
Refrigerators Atlant with two compressors represent a higher level of comfort. In such devices complete independence chambers allow you to set different temperatures in the freezer and refrigerator compartments without influencing each other. For example, you can turn on the super-freeze mode in the lower chamber, and this will not affect the products in the upper part.
This design significantly increases energy efficiency. The motors turn on less often and operate for less time, since the volume of cooling space for each of them is smaller. Working life a two-compressor system is usually higher, since the load is distributed between two units. If one fails, the second can temporarily maintain the temperature in its chamber, which will give you time to call a technician.
However, it is worth considering that the cost of such refrigerators is higher, and they take up a little more space in the niche for compressors. When repairing, you will also have to take into account the features electronic control, which coordinates the operation of two motors. Often such models are equipped with additional sensors and a more complex air circulation system.
Comparison characteristics: table of differences
To better understand the difference between types of systems, it is advisable to consider their key parameters in comparison. This will help you make an informed decision when purchasing or evaluate the capabilities of existing equipment. Energy consumption and noise level are the most important criteria for most users.
| Characteristics | One compressor | Two compressors |
|---|---|---|
| Independence of chambers | Partial or absent | Complete independence |
| Energy consumption | Average or high | Optimized, lower |
| Noise level | Higher (more powerful motor) | Lower (smaller motors) |
| Repair cost | Lower | Higher |
| Freezing speed | Standard | High (intensive) |
The table shows that two-compressor models win in functionality and comfort, but lose in the original price. Reliability both types are comparable with proper operation, since the plant Atlant uses high-quality components in both cases.
How to determine the number of compressors without opening
It is not always possible or willing to look behind the refrigerator. There are easier ways to find out how much motor your unit has. The most reliable method is study technical documentation. The number of compressors is always indicated in the operating instructions or on the manufacturer’s website by model number.
The second method is to analyze the behavior of the refrigerator. If you hear that the motor is humming, but the cold in one of the chambers does not increase (or, conversely, the freezer is working, but the refrigerator is warm), this may indicate problems with switching flows in a single-circuit system. In dual-circuit systems, failure of one motor often manifests itself locally. Also pay attention to the control panel: the presence of separate temperature controls for each chamber often (but not always) indicates the presence of two circuits.
⚠️ Attention: The model number on the sticker is the most accurate source of information. Don't rely solely on the feel of the equipment, as electronics can simulate independent operation even in simple models.
You can also simply listen to the sound of the unit running. Single-compressor refrigerators often produce a lower, humming sound, while two small motors can operate at a higher frequency, but are quieter. If you are faced with a choice in a store, ask the consultant to show the technical data sheet of the model you like.
☑️ Check before buying a used Atlanta
The influence of the compressor type on defrosting and care
The type of installed system directly dictates the rules for fridge care. In models with one compressor and manual defrosting, it is necessary to regularly, approximately once every six months, disconnect the unit from the network. Ice accumulation in such systems this happens faster, since moist air from the refrigerator compartment can enter the freezer and vice versa, depending on the design of the evaporator.
Two-compressor models are often (though not always) equipped with a system No Frost or improved drip defrosting. In them, the defrosting process is automated: the timer periodically turns on the heating element, and the moisture evaporates into the pan. The user can only monitor the cleanliness of the drainage hole. Care for such refrigerators It is minimal, but requires regular cleaning of the ventilation ducts from dust.
Regardless of the number of motors, it is important to keep the condenser (grids at the back) clean. Dust on the radiator fins causes compressor to work longer and more intensely, which reduces its resource. Wipe the back wall with a dry cloth or use a vacuum cleaner with a soft attachment once every 3-4 months.
Frequent malfunctions and their connection with the number of motors
Statistics of service centers show that the nature of breakdowns may vary. In single-circuit systems, switching valves are more likely to fail, since they bear a large load on flow control. A symptom may be a situation where the refrigerator hums constantly, but does not cool. thermostats and switching valves, since they have a large flow control load. A symptom may be a situation where the refrigerator hums constantly, but does not cool.
In dual-circuit systems, an element of risk is added associated with electronic control module. If the control board is faulty, it may not give the command to start one of the compressors. It is also less common, but it happens that one of the motors fails, leaving half of the refrigerator inoperative. Replacing the compressor in such cases requires a qualified approach and evacuation of the system.
It is worth noting that modern inverter compressors, which are being introduced into top models Atlant, operate on a different principle and have practically no analogues among older models. They are distinguished by a smooth start and the absence of a characteristic click at start. If your refrigerator operates absolutely silently, perhaps you have just such an advanced model.
Is it possible to replace one compressor with two in an old refrigerator?
Theoretically this is possible, but in practice such a modification is not economically feasible and technically difficult. It will be necessary to weld the tubes, change the heat exchangers, reflash or replace the control unit and redo the housing. It is easier and cheaper to buy a new refrigerator with a factory two-compressor system.
Why does an Atlant refrigerator with one compressor not turn on for a long time?
Long pauses between starts may indicate a malfunction of the thermostat, a freon leak, or problems with the start relay. In single-circuit systems, this may also be due to the fact that the system cannot reach the required temperature in one of the chambers due to a loose door fit.
Does the number of compressors affect the energy consumption class?
Yes, directly. Models with two compressors are often class A or A+, since they do not waste energy on cooling already cold chambers. Older generation single-compressor models more often belong to class B or C, although modern examples can also be very economical.
Do two-compressor refrigerators hum louder?
No, as a rule, they are quieter. Two small motors create less vibration and noise than one large motor working at its limit. However, if one of them fails, the nature of the sound may change.
What is the service life of Atlant compressors?
With proper operation and compliance with installation conditions (a gap near the wall, a flat floor), Atlant compressors last 10-15 years or more. Inverter models can operate for up to 20 years due to the absence of peak loads at start.