One or two compressors: how many does a refrigerator need?

It turns out that everything is not so simple: it depends on the specific situation. Many opinions about the superiority of one of the types are baseless.

The compressor is the heart of the refrigerator, the unit that pumps the refrigerant throughout the system. Previously, refrigerators had only one compressor that worked simultaneously for the freezer and refrigerator compartments. Then two-compressor models began to appear. Can you tell which one is better? To do this, it is worthwhile to conduct a small comparison of capabilities and characteristics.

Noise from work
Many believe that refrigerators with two compressors are noisier. After all, there are two units! In fact, this is not the case: firstly, these compressors have a small capacity – after all, they only need to cope with one compartment. Secondly, they often work alternately so as not to create a large load on the network.

So the noise of the refrigerator does not directly depend on the number of compressors. But from their type – very much even. An inverter compressor (like Hisense RQ563N4GW1) is quieter than a conventional linear compressor. The noise level is especially relevant for studios: there are usually no walls between the kitchen area and the bedroom, so loud sounds will interfere with sleep.

An inverter compressor is quieter than a conventional linear compressor.

Separate temperature control
It is believed that the main advantage of two-compressor refrigerators is the ability to adjust the temperature separately in the freezer and refrigerator compartments. Or even turning off one of them for defrosting.

However, now for many single-compressor rooms, a solution has been found that allows you to change the temperature in the refrigerator compartment or even turn it off independently of the freezer. For this, such models use two circuits and a solenoid valve that controls the supply of refrigerant. It can completely cut off the flow of freon into the refrigerator – and wash it to health.

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Refrigerator HISENSE RQ563N4GB1

Even if a refrigerator with one compressor does not have such a valve, various technologies allow you to create optimal conditions for storing food. For example, the Hisense RQ563N4GB1 model uses the Multi-Air Flow dynamic cooling system, which ensures uniform cooling of the entire chamber. At the same time, separate boxes with a low temperature are allocated for fresh products (meat, fish, vegetables) (My Fresh Choice zone). Another interesting mode of this refrigerator is “Vacation”, in which the freezer continues to work, and the temperature in the refrigerator compartment is maintained at 15 ° C to save energy during your departure.

“Vacation” – maintaining a temperature of 15 ° C to save energy during your departure.


The design of traditional single compressor refrigerators is fairly straightforward. From the point of view of equipment reliability, this is a big plus. But if the compressor fails, both the freezer and the refrigerator compartment will shut down.

When you have two compressors, the breakdown of one is not so critical. Either the freezer compartment or the refrigerator compartment will stop working, but not two at once. On the other hand, two separate cooling circuits, each with its own control, are structurally more complex. This means that the theoretical probability of breakage increases.

Of course, refrigerators are a fairly reliable type of equipment. Nowadays, the Soviet “Dnepr” and “Saratovs” are still working properly, so you shouldn’t think about repairs even before buying.

Everything is clear here. Since the design of two-compressor refrigerators, as we have already found out, is more complicated, then the cost is higher. If we compare two models of approximately the same volume with the same set of functions, the one with two compressors will be 20-30% more expensive. At the same time, from the point of view of the manufacturer, there are no differences either in terms of warranty periods or in terms of the estimated resource.

Total: how many compressors do you need?
Single compressor refrigerators are a classic reliable solution. Fewer parts, less risk of breakage. You are unlikely to feel a lack of features if you buy a mid-range or premium model. Ideal storage conditions can be created for any product. Moreover, such models are much cheaper than options with two compressors, and therefore are more popular.

Double compressor refrigerators are great for large families who often open doors and regularly load large quantities of food. Separate motors cope faster with the cooling of food and compensate for the flow of warm air into the chambers. Moreover, in the event of a breakdown of one of the compressors, only one compartment will suffer, the second will work properly. If it is important for you to control the temperature in the refrigerator or freezer with an accuracy of the degree, it is better to buy a two-compressor refrigerator with an electronic control system.