It is not so difficult to understand how the air conditioner works and where the refreshing coolness comes from in the thirty-degree inferno. Consider this on the example of a split system. As is known from the school physics course, during evaporation, any liquid absorbs heat. If you put alcohol or cologne on your hand, you will immediately feel cold. Conversely, when steam condenses, heat is released.
It is this well-known principle that any split system exploits. Slightly exaggerating, we can assume that its main element is a closed copper tube. One part of it passes through the indoor unit, the other through the outdoor unit hanging outside. This is the refrigeration circuit, inside which freon circulates. When passing through the indoor unit, freon turns into a gas, which means it cools the room. In the outdoor unit, it again becomes a liquid, giving off excess heat to the surrounding air. And so time after time.
True, freon is a lazy liquid, and by itself will not flow anywhere. To do this, the air conditioner has a special «pump» — a compressor that creates the necessary pressure in the refrigeration circuit. In addition, sections of the refrigeration circuit inside the blocks are equipped with aluminum plates that help freon more efficiently share heat or coolness with the surrounding air. These devices are called heat exchangers. And in order for the process to go even faster, air is blown through them with the help of fans. The same thing happens in a window air conditioner, only all its components and assemblies are located in one housing.
If necessary, the air conditioner can also be used for heating. Only in this case, heat is not transferred from the room to the street, but vice versa. An air conditioner operating in room heating mode is called a heat pump.
Source: «WE BUY FROM A TO Z» SPECIAL EDITION HEAT AND COLD IN THE HOUSE