Single-compressor or two-compressor refrigerator: which is better?

What is the difference between a single-compressor refrigerator and a two-compressor refrigerator?

There are a huge number of varieties of refrigerators on the market, so it is very difficult to decide on the purchase choice. Moreover, technology becomes more advanced every year. There are several cooling methods that are used in the production of refrigerators. The compressor type of cooling in production is the most common in the manufacture of household appliances.

Technological differences:

The single-compressor model is characterized by the presence of a single cooling circuit with one blower, controlled by one thermostat.
A two-compressor device has at its disposal two superchargers that circulate freon through two independent circuits.

The design of a single-compressor refrigerator is based on the principle of using a single cooling circuit for existing storage chambers. In such devices, the temperature in both chambers cannot be adjusted separately. But this does not interfere with the continuous operation of the refrigeration unit.

Double-compressor refrigeration units have two independent units with their own cooling circuits.

Each independent circuit influences a specific department. This feature allows separate control systems to perform the function of temperature control, as well as targeted influence on the compartments.

Advantages and disadvantages of 2-compressor models

Advantages:

• Productivity. 2 independent units quickly cool the inside of the refrigerator. This is true if there are a lot of foods that need to be frozen or refrigerated as soon as possible. With a two-compressor model, you can quickly achieve low temperatures during a temporary power outage.

• Cost-effective. Oddly enough, the energy efficiency of a refrigerator with two working units is higher. Firstly, if there is no food to store in the refrigerator or freezer compartment, you can simply turn it off. Secondly, the refrigerator compartment uses a smaller compressor, so the electricity consumption for cooling is lower.

• Less noise level. This is logical: the lower the power of the unit, the quieter it operates. And synchronous operation of both nodes is a rather rare phenomenon.

• Possibility of flexible control of the operating mode (independent configuration of each compartment). This is not possible with single-compressor models.

Flaws:

• High price. The compressor is the most expensive component of a refrigerator (up to half the price of the entire device). Therefore, a two-compressor device is 20-50% more expensive than an analogue with 1 unit.

• Less reliability. The rule works here: the more complex the device, the more unreliable it is. Because components tend to fail. Here the probability of breakdown is clearly higher. True, the other compartment will be operational, but this is little consolation.

Pros and cons of single-compressor refrigerators

A refrigerator with one compressor has a refrigerator compartment with a total volume of about one hundred liters and a small freezer compartment (sometimes missing). One refrigerator compressor copes with organizing stable and uninterrupted operation of the cooling system. This type allows you to set the temperature for both operating chambers at the same time.

This type of refrigerator most often does not imply separate shutdown of the freezer and refrigeration compartments. This property cannot be considered negative, since it makes sense from an economic point of view.

In addition, some of the single-compressor models are equipped with a specialized solenoid valve that allows you to regulate the freon flow. The function of this component is to block access of freon to the heat exchanger of the refrigeration chamber, as a result of which cooling stops, but the freezer does not stop its operation.

The disadvantages include the fact that a single-compressor refrigerator creates a lot of noise due to the compressor motor being too powerful. Therefore, these models need to be installed in a place remote from the recreation area (for example, in the kitchen). And electricity consumption increases several times due to the powerful compressor, which works almost all the time.

What is a single compressor refrigerator

Single compressor refrigerator

A compressor is a kind of pump responsible for compressing freon and moving it along the circuit. The single-compressor device is supplemented with a high-power unit. When choosing which is better - refrigerators with two compressors or one, you need to compare the main characteristics, capabilities, positive and negative aspects of each type.

Features of 1 compressor refrigerators

In these devices, the freezer and refrigeration chambers are combined into an inseparable system, and the compressor is responsible for its operation.

The refrigeration circuit of such a device consists of:

compressor;
capacitor;
discharge and suction pipeline;
evaporator;
drying filter;
capillary tube.

There are models that have one evaporator for the freezer and refrigerator. They are connected in series to each other. Typically, the temperature in the chambers is not regulated separately from each other. There are the latest models that are equipped with a separate thermal control system. They can adjust the temperature separately in the refrigerator and freezer compartments.

Advantages and disadvantages

The positive side of the single-compressor refrigerator model is its low cost. Due to the fact that there is only one compressor and circuit, the device weighs less than a two-compressor unit. The design stands out for its simplicity and reliability.

The downside is that autonomous temperature control is not possible. The compressor has to work longer, which leads to a decrease in service life. It is impossible to precisely adjust the temperature mode, nor can you turn off one of the cameras. And this is important when a freon leak occurs.

A compressor failure leads to complete failure of the refrigerator.

5 best refrigerators with one compressor according to owner reviews

Indesit DF 5200 W

ATLANT XM 4008-022

Hotpoint-Ariston HF 9201 B RO

Indesit DFE 4200 W

ATLANT XM 4012-022

Advantages and disadvantages of two-compressor refrigerators

When choosing a one- or two-compressor refrigerator, you should not get too hung up on their comparison. Each individual buyer will be shown the distinctive features of all models in which he is interested.

The presence of an additional compressor increases the speed of the function responsible for freezing, while simultaneously increasing the overall dimensions of both the freezer compartment and the refrigerator compartment. This criterion influences the purchase or refusal to purchase, since it may be excessive for one family. Most often, a single-compressor model is chosen for the home, which can perfectly cope with the basic functions of storing food in it.

Pros of buying a refrigerator with two compressors:

Due to the presence of a separate compressor in each compartment (freezing and refrigerating), the load is evenly distributed across both systems, making freezing of food as fast as possible.
It is possible to disable any of the two cameras separately. This function is very useful in case of long-term absence and when it is necessary to defrost the main compartment.
When freezing, each compressor receives less load.
The failure of one of the two compressors does not affect the operation of the other.

Negative aspects of two-compressor refrigerators:

The cost is higher than that of refrigerators with one compressor.
If the climate class of the refrigeration device is incorrectly selected, energy consumption increases.
Some of the compressors can create a lot of noise.

Which refrigerator should you choose?

When the choice is between a refrigerator with one or two compressors, first of all, it is worth considering the availability of the necessary functionality and ease of use of the unit. To make the right choice, experts recommend making a personal list of needs regarding a refrigeration appliance. For example, if you need a unit for a studio apartment, where the device will be located in close proximity to the recreation area, you should consider models with two compressors. They are quieter in operation and will not cause discomfort to their owners during the day. It is also worth choosing this type if the consumer is often away. To save energy and motor resources, a function is provided to turn off the refrigeration chamber, which will be a big plus in use.

Important! A two-compressor refrigerator is ideal for storing large quantities of food. When the chambers are fully loaded, the motors will perform the task of cooling and freezing products well. To store small amounts of food, it is better to use small-sized models of single-compressor refrigerators. In this case, space can be saved, which is especially important for small kitchens, such as in “Khrushchev” and “Stalin” buildings.

What to consider when choosing a one- or two-compressor refrigerator

The large size of the refrigerator is most attractive to buyers, but it is worth considering the moment of real need for such a size. If a person is accustomed to filling his refrigerator entirely with various products, then its purchase may be justified. But if you use a refrigeration device only to store a couple of types of products, you can safely be content with one compressor.

Carrying a huge amount of product places an increased load on the refrigeration unit because the door is held open much longer and the heat that gets inside requires the chiller to work harder. Subsequently, such moments lead to an increase in the load on the units and components of a refrigerator with one compressor, and subsequently to its breakdown.

A refrigerator with two compressors is most useful for housewives who prepare fresh fruits, berries and vegetables for further use in the winter. Since even a completely filled freezer in such a device will consume a very small amount of electricity. And super-frozen will allow you to enjoy fresh whole berries during the coldest time of the year.

Purchasing a two-compressor refrigerator becomes unprofitable if the potential buyer’s home experiences frequent power outages. This may disrupt the stable operation of the refrigeration unit, and you will have to pay for repairs out of your own pocket. In this case, savings and other advantages are completely eliminated, since constant defrosting will require frequent turning on and off of the freezer.

Choosing a refrigerator: one- or two-compressor

A potential buyer has the right to determine for himself what he wants to purchase. If price is not an issue, then a model with two compressors will be the best choice. The undeniable advantages of this technique are obvious. It is economical, low noise, with great functionality.

However, a good substitute for a complex household device can be a modification with a solenoid valve, which is simpler, less expensive, and economical.

For adherents of traditional classic single-unit refrigerators, there are many good models from well-known manufacturers.

In short, there is plenty to choose from. Either a single-chamber, a two-chamber, or even a three-chamber refrigerator, depending on your needs. It is important to remember that the main indicator for technology is its performance. And personal taste will always tell you which choice to make.

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Comparison of characteristics of one- and two-compressor refrigerators

Different refrigeration units have different characteristics, one of which is noise. In a compressor unit, freon, which consists of gas and passes through a heat exchanger, absorbs heat in the operating compartment. After which the compressor pumps the heated steam into the condensate trap, in which the process of cooling and turning the gas into a liquid occurs. Exposing the refrigerant to low pressure causes it to boil and revert to gas. It then returns to the heat exchanger. This process occurs continuously, so there is no noise.

There are no completely silent compressors, but running two compressors creates less noise than running one (due to constant operation at full power).

Dual-compressor models often have a digital control mechanism, the interface of which is user-friendly.

The display shows current temperature values in various compartments and chambers, as well as information about the processes occurring inside the refrigeration unit. The control system is located on the front panel of the door or in an application on a smartphone. You can upload your shopping list, photos, graphics, and more.

The electronic control system is the most vulnerable part of a refrigerator with two compressors, which is considered a significant drawback. A single-compressor refrigerator with mechanical control fails much less frequently, but is also significantly inferior in functionality. In such refrigeration units, the temperature in the compartments is regulated, the refrigerator compartment has a lockable shelf for perishable goods, a stand for eggs and bottles, and the freezer has a narrow shelf for a container with ice and two lockable shelves for freezing.

For ease of operation, two-compressor devices are used. Two independent circuits are configured in such a way that it is possible to set their own temperature values in different chambers. Such devices have extensive functionality. Refrigerators with the “No Frost” function are able to operate without the formation of an ice crust, so there is no need to defrost every few months.

The “Low Frost” function prevents the formation of ice, thanks to which the products do not lose excess moisture.

A similar function to the one already discussed is quick (shock) freezing, which allows you to instantly freeze foods without compromising the micro- and macronutrients they contain. Due to the special conditions of air distribution, which evenly distribute the cold, around zero temperature, the most favorable conditions for keeping food fresh are achieved. Cold storage devices help increase food storage time. Cold storage batteries are needed in places with unstable power supply.

In devices with two compressors, it is often possible to turn off one chamber without turning off the entire refrigerator due to the ability to turn off one of the device circuits. Unlike a two-compressor refrigerator, in a single-compressor refrigerator the flow of freon along the circuit is stopped by a special valve, thanks to which it is possible to turn off one chamber without turning off the thermostat of the device. The price range of double-compressor refrigerators is on average 25% higher, however, due to the obviously lower power consumption of the devices, electricity consumption is also reduced. This is due to the fact that the compressor does not need to cool one large circuit, and the dependence in energy consumption works according to linear laws.

What is a two-compressor refrigerator

Double compressor refrigerator

Such models are additionally endowed with greater functionality. One compressor pumps cold into the refrigerator compartment, the second - into the freezer. Temperature modes are configured separately for each compartment.

Features of 2 compressor refrigerators

A two-compressor unit is 2 separate refrigerators placed in a single housing.

This technique consists of two:

low power compressors;
discharge and suction pipelines;
control units;
capacitors;
evaporators.

Advantages and disadvantages

The advantages of the device include the ability to defrost the chambers separately. Compressors have less power. Each device is responsible for a specific compartment. What affects the number of compressors in the refrigerator is that the optimal temperature mode can be set in each compartment.

Both compressors are switched on independently of each other as soon as the temperature rises in the corresponding chamber. They work in a lightweight mode. This has a positive effect on reliability. And since each volume is smaller than in a conventional appliance, a 2-chamber refrigerator operates for less time. As a result, energy consumption can be saved. It has a more efficient fast freezing function.

Has a two-compressor refrigerator, pros and cons. Among the disadvantages, it is worth noting the high cost. For equipment with more working units, the likelihood of breakdown increases. Although, if one of the compressors breaks down, the device still continues to freeze. However, a failed unit will have to be repaired in any case, and this must be done as quickly as possible.

5 best refrigerators with two compressors according to owner reviews

ATLANT XM 6025-031

Liebherr SBS 7212

ATLANT XM 6026-080

Westfrost VF 910 X

ATLANT XM 6023-031

Tips for choosing

So, which refrigerator is better to choose: with one compressor or with two? It is worth relying on the purpose of its acquisition:

If there is a need for a device with a large volume of chambers, from two hundred to three hundred liters, you should concentrate only on refrigerators with two compressors.

A device with one compressor is not able to cope with such volumes of cooling chambers.
If a minimum set of goods will be stored in the refrigerator, then you need to choose a single-compressor unit.

And if there is a need to prepare a large number of products, then it is worth taking a closer look at two-compressor devices.
If you need to freeze food for the winter, then you should choose a refrigerator with two compressors, and, conversely, if there is no such need, choose one compressor.
If there is a need for multifunctionality, then two compressors are what you need. But if such a function is not a priority, then you should not pay a higher price, but give preference to one compressor.
And the last piece of advice: having a second compressor gives a refrigeration unit many significant advantages, but before making a decision, each buyer should think carefully about how important they are for him and whether he is willing to overpay for functionality.

Based on all of the above, it becomes clear that single-compressor and double-compressor devices differ not only in cost, but also in functionality, principle of operation, power consumption, operating volume threshold, and control method. In the process of selecting a suitable refrigerator, experts recommend relying not only on your financial indicators, but also on the necessary functionality of the device and operating conditions.

Models with one compressor are not suitable for lovers of perishable goods and those who store semi-finished products and drinks in the working chamber. Single-compressor devices, although they have the advantage of low cost, over a long period of time cause a blow to the pocket through a serious increase in energy consumption. Dual-compressor devices are often chosen by larger families in which long-term storage of products is a direct necessity.

Useful recommendations when choosing

A refrigerator is an important and useful type of appliance in the modern world. Here are some recommendations for choosing the right food “keeper”. Size is important; when choosing a size, you must take into account the area of the room where it will be located. You should not choose a large unit for a small kitchen. Height. Here the choice depends on the average height of all users; using the device should be comfortable for each family member. Refrigerator and freezer volume. It is necessary to take into account how many preparations are made for freezing for the winter and the daily filling with products. You should like the appearance or match the interior design. The defrosting method is very important if it is not possible to periodically defrost the refrigerator. The noise level is important, you should pay attention to the number of dB, it should not exceed 40. The location of the shelves. The best step size between shelves is 10-15 cm, which is convenient for height adjustment. Energy consumption. It is advisable to choose class A-C, as they use less energy.

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