The exhaust side of a window air conditioner (the side that faces outside) becomes hot during operation due to the nature of the cooling process and the components involved. Here's an explanation of why the exhaust side gets hot:
Compressor and condenser: Window air conditioners have a compressor and a condenser coil that are responsible for the cooling process. The compressor compresses the refrigerant gas, which raises its temperature. The hot, high-pressure refrigerant then flows into the condenser coil located on the exhaust side.
Heat transfer: The condenser coil is designed to release heat from the refrigerant into the surrounding air. As the hot refrigerant passes through the condenser coil, it transfers its heat to the metal fins of the coil. The condenser fan blows air over these hot fins, facilitating heat transfer and helping to cool down the refrigerant.
Heat dissipation: The hot air from the condenser coil, which carries the heat from the refrigerant, is then expelled to the outside environment through the exhaust vents or louvers on the unit. This hot air is what you feel on the exhaust side of the air conditioner.
Removal of heat from the room: By releasing the heat generated from the cooling process to the outside, the air conditioner helps remove the heat from the room, thereby cooling the indoor space. The hot air on the exhaust side is a byproduct of this heat transfer process.
It's important to note that the exhaust side of a window air conditioner can get quite hot, so it's advisable to avoid touching it to prevent burns or injuries. Additionally, ensuring proper ventilation and clearance around the unit's exhaust side helps facilitate heat dissipation and allows the air conditioner to operate efficiently.