We choose and compare a single-compressor or two-compressor refrigerator - the advantages and disadvantages of the models, the main differences

A refrigerator is one of the household items that is not purchased every day, so its choice should be taken with full responsibility. Currently, there are units with different numbers of chambers, compressors, different colors and designs. Let's consider single-compressor and two-compressor types, find out the differences and advantages of the models.

A refrigerator is one of the household items that is not purchased every day, so its choice must be taken with full responsibility

Features of refrigerators with different numbers of compressors

A compressor is an element of the refrigerator that is responsible for compressing, pumping, and redirecting the refrigerant, thanks to which the required temperature is maintained in the refrigerator. The compressor type of refrigerator is the most common. Most refrigeration units have one compressor, which is simultaneously responsible for the operation of the freezer and refrigerator compartments. Two-compressor refrigerators are less common. In this case, each compressor is responsible for a separate chamber.

The compressor type of refrigerator is the most common.

See also “Freshness zone” in the refrigerator - what is it?

What is the difference between refrigerators with different numbers of compressors?

Before you understand whether a single-compressor or a two-compressor refrigerator is better, you should understand how they differ. Number of compressors in the refrigerator. It mainly depends on the number of chambers, but in two-chamber refrigerators both one and two compressors are installed.

Number of compressors in the refrigerator. It mainly depends on the number of chambers, but in two-chamber refrigerators both one and two compressors are installed.

Refrigerant type. Modern refrigerators use refrigerants: butane, propane, ether, isobutane (R600a). The most environmentally friendly is isobutane, it is harmless and does not destroy the ozone layer of the planet.

Modern refrigerators use refrigerants: butane, propane, ether, isobutane (R600a)

Temperature settings for freezing/cooling. In refrigerators with two compressors, independent temperature control in any of the chambers is possible. In single-compressor models, the temperature settings in the chambers depend on each other.

In refrigerators with two compressors, independent temperature control in any of the chambers is possible.

Defrosting system. Such systems include: drip, NoFrost, manual defrosting. With a drip system, defrosting occurs due to the evaporator located on the rear wall; a drain is located at the bottom of the evaporator. Manual defrosting is done by turning off the freezer and then cleaning it from water and dirt. The NoFrost system is equipped with an evaporator and a fan built into the chamber wall. Due to the well-thought-out configuration of the system, the refrigerator does not require defrosting.

Defrosting system. Such systems include: drip, NoFrost, manual defrosting.

See also “no frost” technology in refrigerators.

Choosing a refrigerator: single-compressor or two-compressor

What is better - a refrigerator with two compressors or one? To answer this question, let’s understand the essence of the operation of the units, their functions, advantages and disadvantages.

Experts recommend making a choice based not only on how many options a one- and two-compressor refrigerator has, but also on the user’s needs for them. For example, blast freezing is needed for those who make preparations for a long period of time.

If you don't eat at home and only store drinks and cat food in the refrigerator, you don't need a freshness zone.

Comparative characteristics

1. Number of cooling systems Modern refrigerators have more than two chambers, which are connected by a cooling circuit. With one compressor, independent temperature control is not possible, since there is only one circuit. With two installed compressors, independent temperature control in the chambers is possible, since it already has two cooling circuits.

Modern refrigerators have more than two chambers, which are connected by a cooling circuit.

2. Saving energy The most economical in this regard is a two-compressor refrigerator. Reduced energy consumption is achieved by equipping it with two low-power compressors operating alternately. The energy consumption of a single-compressor refrigerator will be significantly higher due to the constant operation of the element.

The most economical in this regard is a two-compressor refrigerator

3. Noise level On average, the volume of a refrigerator with one compressor is 40 dB and is comfortable for a person, especially if the refrigerator is located in a non-residential room. In small apartments it is better to use a two-compressor refrigerator, since its noise level is on average 30 dB.

In small apartments it is better to use a two-compressor refrigerator, since its noise level is on average 30 dB.

4. Cost The difference in the cost of refrigerators with different numbers of compressors is significant. Often more expensive models are equipped with two compressors. You can often find more budget options, but the price will still be approximately 25% higher compared to a single-compressor analogue, taking into account the complete similarity in functionality.

The difference in the cost of refrigerators with different numbers of compressors is significant. More expensive models are often equipped with two compressors

5. Functionality Due to their high cost, two-compressor refrigerators have the largest range of functions that facilitate the process of use. The main difference between the two compressors is the function of turning off one of the cooling systems, or, conversely, using one circuit in fast freezing mode.

Due to their high cost, two-compressor refrigerators have the largest range of functions that facilitate the process of use.

In addition to the advantageous differences, the two-compressor system is equipped with classic functions that are available in single-compressor versions.

No-Frost is a function that eliminates the need to periodically defrost the refrigerator. Due to automatic control of temperature differences, it protects the freezer from snow and ice build-up.
Antibacterial - an inorganic coating of the walls that protects against: the appearance, growth and spread of: bacteria, mold, microbes. The properties of the antibacterial coating are maintained throughout the entire period of operation.
Super Freeze - function of shock freezing of products. Eliminates the formation of an ice crust on the inner surface of the refrigerator and freezing of packages to the walls of the freezer; when defrosting, the original shape, beneficial properties and color of the product are preserved.
Super Cool - fast cooling of food and drinks. The function allows you to quickly lower the temperature in the refrigerator compartment for further cooling, eliminating the possibility of food freezing.
Fresh box - a freshness zone, usually presented in the form of a drawer or a separate compartment for storing fruits and vegetables with zero temperature and automatic humidity control.

Of course, two-compressor units are superior to their “younger brothers” in functionality. For example, a refrigerator with two compressors will help out during a long trip; you just need to set the necessary functions.

See also: Design of a one-room apartment in a house of the “P 44” series, photo.

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

It doesn't matter whether the refrigerator has one or two compressors. It makes noise, has a control system and certain functionality. However, the performance of different units differs from each other.

Noise

The cooling scheme in compressor refrigerators is based on the properties of the refrigerant. Freon in a gaseous state passes through the evaporator and absorbs heat in the working chamber. The compressor then pumps the heated steam into the condenser, where it is cooled to room temperature and converted into liquid. Under low pressure conditions, the refrigerant boils, turning back into gas, which enters the evaporator. And so again and again.

Control systems

Almost all two-compressor units have an electronic control system . It is convenient, provides the user with information about the temperature in the chambers and in various zones, as well as about the processes occurring inside the equipment.

Some models are equipped with a color display on the front of the door, where you can upload pictures and photos, a shopping list, and send SMS. One of the disadvantages of the electronic control system for two-room apartments is its vulnerability: the mechanical control of a single-compressor refrigerator breaks down less often than its electronic counterpart.

Functional

In terms of functionality, two-compressor refrigerators are superior to one-room refrigerators.

Almost always they have the following functions:

No Frost - refrigeration chambers operate without a crust of ice appearing over time, which eliminates the need to defrost the refrigerator every 2-3 months.
Low Frost - similar to the first function, it slows down the appearance of ice. Its purpose is to prevent products from losing excess moisture, as happens with No Frost.
Super cooling - allows you to quickly cool food in the main chamber.
Air distribution system - evenly disperses the cold throughout the chamber.
Zero zone - brings the temperature closer to and maintains 0°C, allowing food to remain fresh much longer than in the general refrigerator compartment.
Quick or blast freezing is similar to super cooling. The function allows you to quickly freeze fresh foods, preserving their benefits as much as possible.
Cold accumulators - increase the cold retention period. The function is useful during periods of power outages.
Ice Maker - Generates ice and allows you to store it. There are models that are equipped with ice supply to a container located on the outside of the door.

A single-compressor refrigerator has more modest functionality.

Traditionally, such units offer:

Possibility of temperature control in chambers.
A lockable shelf for storing perishable foods.
A narrow shelf in the freezer for storing ice containers.
Stand for bottles and eggs.

Price

Two-compressor units cost 15-30% more than single-compressor analogues. Nevertheless, buying a two-room unit saves the family budget, since two compressors separately consume less electricity than one.

Occurs due to load distribution and no need to cool one large circuit.

Convenience

In terms of ease of use, two-compressor refrigerators also traditionally benefit. Each of the “kopeck piece” circuits is configured separately, this allows you to set different temperature conditions in the freezer and the main chamber.

A convenient function that allows you to turn off the main chamber without damaging the freezer is available in refrigerators with one and two compressors.

A two-compressor unit turns off one of the circuits and leaves the second on. A single compressor uses a special valve to shut off the flow of refrigerant into one of the chambers. This way the temperature is regulated and one of the cameras is turned off.

Main pros and cons

Like all household items, refrigerators with different numbers of compressors have their positive and negative qualities. 1. Single-compressor models In 1874, K. Linde invented the first refrigeration machine with a single compressor; the device was used in industry and for transporting products. A few years later, Elijah Thompson began improving the refrigerator and equipped the machine with the ability to operate on electricity. And the modern configuration of the unit was created by the Danish engineer Christian Steenstrup, who placed the entire structure in a sealed box.

In 1874, K. Linde invented the first refrigeration machine with one compressor; the device was used in industry and for transporting products

Now single-compressor unit models are the most popular among their users. But are single-compressor refrigerators really that good? To understand this, it is worth considering all the pros and cons.

+ Stable and trouble-free operation of the cooling system. + One temperature controller. + Unit sizes range from compact to larger models. + Useful functions: Antibacterial, Fresh box, Super Freeze, No-Frost. + Low cost. Models with one compressor are less functional, which results in a low cost.

— The powerful motor-compressor is very noisy during operation. Such models should be installed in the kitchen or in another room not intended for recreation. — When defrosting, you cannot turn off one chamber; single-compressor models do not provide this function. Therefore, you can defrost the refrigerator only by turning it off completely. - Energy consumption. Due to the fact that one powerful compressor is installed, operating almost constantly, energy consumption increases significantly.

See alsoStorage systems for the kitchen, photos.

Specifications and features of a single compressor refrigerator

The technical characteristics of the refrigerator depend on the compressor that is installed in it. There are several types of compressors:

Conventional - they work in older units and have two modes: “On.” — maximum load and “Off.” - complete shutdown. Here the pump pumps freon and moves it through the tubes.
Linear - also works at full power or turns off, it does not have a middle mode. In the magnetic coil of such a compressor, a pump piston moves horizontally, which builds up pressure and cools the agent in the tubes.
An inverter is a motor with a coil that creates freon pressure in the refrigerator system. It is characterized by smooth operation and the ability to reduce power.
Linear inverter - in such a magnetic coil has an adjustable frequency of the piston speed. This design is the quietest and most economical.
Inverter - turns on or off depending on the temperature in the chambers.

A refrigerator with one compressor uses one pump. During the cooling of the chambers, one compressor operates, which cannot turn on the cooling of the freezer or refrigerator compartment separately.

Video: How the compressor works

Important! When choosing a place to install a refrigerator, you should consider places away from heating devices (stove, kettle, radiator, fan heaters, etc.). Location next to them negatively affects the compressor and causes the motor to overheat, due to which the energy consumption of the unit will increase several times compared to stable operation. It is also undesirable to install the refrigeration device near water. Liquid entering the motor-compressor will cause irreparable consequences in the form of: short circuit, motor breakdown. Replacing a compressor is one of the most expensive repair services.

2. Two-compressor models Refrigeration units with two compressors appeared relatively recently and have earned attention from consumers who value comfort, convenience and functionality. But, like many modern technologies, such models have their positive and negative qualities.

+ Faster food freezing process. + Function to turn off the refrigerator compartment in case of a long departure. + If one motor-compressor breaks down, the work of the second continues, thus you can continue to use the working chamber. + Alternate operation of compressors ensures quieter operation of the device. + The power of each motor is low, so energy consumption is significantly less.

— If both compressors start working at the same time (this rarely happens), then the noise from operation will be comparable to the operation of the most powerful motor with a noise level of 50 dB. — There is a high probability of failure of one of the many parts. - High price. On average, the cost of a two-compressor unit is 25-30% higher, which is not always justified.

See alsoWhich coffee grind is best for a coffee machine

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.

See also: Refrigerator in the kitchen interior: how to combine with facades?

Advantages and disadvantages of two-compressor refrigerators

When choosing which refrigerator to buy: with one or several compressors, you don’t need to spend a lot of time comparing. The buyer will be provided with the distinctive characteristics of the various models that he will be interested in in the store, but in any case he will have to face a rather large cost. It is not easy to compare quality and cost if you do not familiarize yourself with the main distinguishing characteristics.

An additional compressor increases the speed of the freezing function, while allowing you to increase the overall dimensions of both the freezer and refrigerator compartments. This factor can cause both purchase and refusal due to the redundancy of such equipment for one family. Often, a traditional model that copes with its main tasks of food storage is sufficient for a home.

Since the pros and cons of single-compressor units have already been presented above, it is advisable to familiarize yourself with the similar factors of refrigerators with two compressors. So, the advantages of this technique include the following:

Thanks to the presence of a separate compressor in each compartment, freezing and refrigerating, the load is distributed across two systems, which ensures faster freezing of products.
If necessary, you can turn off any branch separately. This function is especially useful in case of a long trip or if you need to defrost the main compartment.
When freezing, less load is placed on individual compressors.
The failure of one compressor does not affect the operation of another.

In addition to the positive aspects, like any type of equipment, two-compressor refrigerators also have some disadvantages:

Consume more electricity. But this minus sometimes allows you to correct the correctly selected climate class of the refrigerator, its location, etc.
The operation of two compressors produces more noise, although this is mainly influenced by the compressors themselves.
Compared to the single-compressor type, the two-compressor type is slightly more expensive.

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.

See alsoHow to transport it correctly and how long after you can turn on the refrigerator after transportation.