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How does an air conditioner work?

Air conditioners work by removing heat and humidity from the air inside your home and transferring it outside. Here is a basic overview of how an air conditioner works:

1) The compressor: The compressor is the heart of the air conditioning system. It pumps refrigerant gas from the outdoor unit to the indoor unit.

2) The evaporator: The indoor unit contains the evaporator, which is responsible for absorbing heat from the air inside your home. As warm air from your home passes over the cold evaporator coils, the heat is transferred to the refrigerant.

3) The condenser: The refrigerant then flows to the outdoor unit, where it enters the condenser. The condenser releases the heat absorbed by the refrigerant outside, using a fan to blow air over the hot coils.

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4) The expansion valve: The refrigerant then flows through the expansion valve, which lowers the pressure of the refrigerant and causes it to cool down.

5) The cycle repeats: The cooled refrigerant then returns to the indoor unit and the process repeats.

The process of removing heat and humidity from the air inside your home helps to keep the indoor temperature at a comfortable level. Air conditioners also help to improve indoor air quality by filtering out dust, pollen, and other airborne particles. For more information on air conditioners, you can visit

Here’s a table summarizing the working of a split air conditioner:

Outdoor UnitContains the compressor, condenser, and fan
CompressorCompresses the refrigerant gas, increasing its pressure
CondenserTransfers heat from the refrigerant to the outside air
FanHelps dissipate heat from the condenser
Indoor UnitContains the evaporator coil, air filter, and fan
Evaporator CoilAbsorbs heat from the indoor air
RefrigerantCirculates between the indoor and outdoor units
Expansion ValveRegulates the flow and pressure of the refrigerant
Air FilterRemoves dust and particles from the indoor air
FanCirculates the conditioned air within the room
ThermostatControls the temperature and settings

The working process involves the compressor in the outdoor unit pressurizing the refrigerant gas. The high-pressure refrigerant moves to the condenser, where it releases heat to the outside air with the help of a fan. The cooled refrigerant then flows to the indoor unit through copper pipes.

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Inside the indoor unit, the expansion valve regulates the refrigerant flow and reduces its pressure. This allows the refrigerant to absorb heat from the indoor air as it passes through the evaporator coil. The cooled air is then blown into the room by the indoor unit’s fan, while the warm refrigerant returns to the outdoor unit to repeat the cycle.

The thermostat controls the air conditioner’s operation by monitoring the room temperature and adjusting settings accordingly. The air filter in the indoor unit helps maintain indoor air quality by trapping dust and particles.

Overall, the split air conditioner works by transferring heat from the indoor air to the outdoor environment, providing efficient cooling and temperature control within the room.


Shubham Garg (Editor is an engineer with a specialization in Mechanical Engineering from AKTU, Uttar Pradesh. Being a mechanical engineer he has always loved to learn the inner working of various machines and consumer electronics. He regularly tests various audio, home appliances, and daily use products, to provide the best advice to readers. He is a wizard that can make your shopping easy, saving you time and stress of figuring out what to buy.

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