How does a mini fridge Refrigerator work?

If once the idea of ​​drinking a good glass of fresh water during long car journeys or during a hot day at the beach was just a mirage, with new technologies it becomes possible. In fact, various systems put into play by household appliance companies and not only offer new models of mini fridges.

The functioning of these objects appears mysterious and in fact it is not always particularly intuitive. What matters is that it is able to accompany us on the hottest days in an easy to use and very effective way. So, let’s see the various functions proposed by the market, also shedding light on the average consumption of each model.

The classic static cooling

As we have already mentioned, each mini fridge works differently: there are in fact various types of operation that also change based on effectiveness and consumption. The first type we want to describe is the classic static cooling: it is a method also used inside electric refrigerators and is therefore the traditional system, present in our kitchens for several decades.

It consists of a circuit that serves to cool the air and which has the classic coil shape: a special gas is placed inside this and everything is inserted inside the walls of the fridge itself, covered with a thin plate usually made of metal, which acts as a thermal insulator.

At the time of ignition, the circuit is cooled thanks to a compressor that is able to push the gas inside the coil. The internal temperature of the fridge can be adjusted by means of a knob connected to a thermostat, so that you can choose the one you think is most suitable for the preservation of your food.

Once this temperature is set, the compressor stops and then resumes operation when the temperature rises again, i.e. when the door is kept open for too long.

In these models it is usual to observe a thin layer of ice on the walls: when the temperature rises, however, the ice melts and the water produced flows into a tray placed above the compressor. This tray is then emptied automatically, since the water generally evaporates due to the heat emanating from the compressor.

Ventilated cooling

The second system that we want to illustrate and that characterizes many mini refrigerator models is the ventilated one. The mechanism is similar to the static one just illustrated, ie the presence of a circuit and the cooling gas is similar. This time, however, there is an additional fan, designed to distribute the cold air in a much more uniform way inside the fridge.

This is a detail that should not be underestimated in the case of large quantities of food, because it is important to be able to guarantee the right amount of freshness in each compartment.

Frost-free cooling

A final method that we want to illustrate is that of frost-free cooling: it is a system that avoids the formation of ice on the walls and therefore makes the defrosting phase easier or completely prevents it.

In this case, the internal temperature of the refrigerator is lowered thanks to a dense network of ducts, through which the cold air passes in a forced way, that is, thanks to the presence of complex electrical and electronic mechanisms.


Although it is not always easy to explain how these types of objects work, it is important to underline that they are very different systems, also from the point of view of energy consumption.

As for the first system, the traditional one, we know that it has been in use for many years now; despite this, however, its operation has slightly changed, because the gas used inside the coil has changed.

In fact, subsequent studies have shown that the disposal of the refrigerator had very serious consequences on the environment from a polluting point of view. Technology has therefore provided for the replacement of these gases with ammonia.


The consumption of this type of appliance is certainly advantageous and does not particularly burden the pockets and the environment: a purchase of this type therefore, if necessary, is a great way to have fresh drinks always with you or to make the furnishing of a guest room or any other room.


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