First – repairs, then – so split, split-system (from the English word split – cleave, split") consists of two separate blocks: the internal (the evaporator) and the outer or external (condenser). Blocks interconnected electric cables and two copper tubes through which flows the refrigerant (Freon). The indoor unit moves out and another thin plastic tube (drain) – to display the condensed moisture. Ideally, it must be connected to the drain (sewer) pipe or to a special tank, but its conclusions are often just on the street, and then a drop of water falling on the heads of passers-by (on how to properly make drainage – see below). Principle of such a split system. If you want to cool down the room, the heat exchanger of the outdoor unit on a single copper tube freon enters the heat exchanger of the indoor unit. They cleaned the fan, resulting from The indoor unit comes out cold air. If the air in the room must be heated, with the help of external heat pump condenser becomes the evaporator and the evaporator becomes the condenser.
In addition to the condenser and evaporator, in a split-system includes a compressor, which is installed in an external unit. The main function of the compressor – compressed freon to make this gas properties that greatly increase the efficiency of the air conditioner. Split: 1 – External (outside) Unit 2 – Internal block wall indoor unit operates virtually silently (the models 'Daikin' noise level of some internal blocks 28 – 31 dB, while the "Mitsubishi", when the engine is turned on the lowest speed – 26 dB, a noise level makes a flying butterfly.) But the fan and compressor of the external device can "buzz" and louder.