This warm air is drawn in through a grille at the base of the indoor unit, which then flows over some pipes through which the refrigerant (i.e., a coolant fluid) is flowing. The refrigerant liquid absorbs the heat and becomes a hot gas itself. This is how heat is removed from the air that falls on the evaporator coils. Note that the evaporator coil not only absorbs heat, but also wrings out moisture from the incoming air, which helps to dehumidify the room.
This hot refrigerant gas is then passed on to the compressor (located on the outside unit). Being true to its name, the compressor compresses the gas so that it becomes hot, since compressing a gas increases its temperature OR VISIT HERE FOR MORE INFO o general ue !
This hot, high-pressure gas then travels to the third component – the condenser. Again, the condenser remains true to its name, and condenses the hot gas so that it becomes a liquid.
The refrigerant reaches the condenser as a hot gas, but quickly becomes a cooler liquid because the heat of the ‘hot gas’ is dissipated to the surroundings through metal fins. So, as the refrigerant leaves the condenser, it loses its heat and becomes a cooler liquid. This flows through an expansion valve – a tiny hole in the system’s copper tubing – which controls the flow of cool liquid refrigerant into the evaporator, so the refrigerant arrives at the point where its journey started.
Here’s a simplified diagram of the air-conditioning process:
Heatpump 1) condensing coil, 2) expansion valve, 3) evaporator coil, 4) compressor__
(Photo Credit : Ilmari Karonen / Wikipedia)
Although all the components involved in the air-conditioning process in window ACs are located inside the same metal box, the underlying process of cooling remains exactly the same.
Air conditioning unit-en
Parts of a window air conditioner. (Photo Credit : Wikipedia)
The entire process is repeated over and over again until the desired temperature is attained. In a nutshell, an AC unit keeps drawing in warm air and expelling it back into the room until there’s no more warm air left to cool.
Dependent as we may be on air conditioners, it’s surprising to note that they were not intended for human comfort when they were initially developed. The motivation for the first modern air-conditioning system was to eliminate certain problems in the manufacturing processes of a publishing company! To think that a machine intended to support publishing papers on a large scale could one day become an integral part of every modern household is quite something, isn’t it?