For Aircon Servicing & Repair

Call Today 9161-3535

For New Aircon Installation

Call Today 9006-1990

How Do Air Conditioners Work: A Layman’s Explanation

How Do Air Conditioners Work: A Layman’s Explanation

Air conditioners have become an indispensable part of our lives, especially in tropical Singapore. Yet, have you ever wondered how these machines work their magic, transforming warm and stuffy air into a cool and comfortable breeze? In this article, we will unravel the mystery behind air conditioners in a way that even a layman can understand.

The Basics: Refrigeration Cycle

At the heart of every air conditioner is the refrigeration cycle, a process that allows the system to absorb and release heat to create a cooling effect. Imagine this cycle as a continuous loop with four main components: the evaporator, compressor, condenser, and expansion valve.

  • Evaporator

The process begins with the evaporator, located inside your home. This component contains a refrigerant, a special fluid that can easily change from a liquid to a gas and back again. Warm air from your space is blown over coils containing the refrigerant. As the air passes over the coils, the heat is absorbed by the refrigerant, turning it from a liquid into a low-pressure gas.

  • Compressor

Once the refrigerant has absorbed the heat, it transforms into a low-pressure gas and moves to the compressor, typically located outside your home. The compressor is like the heart of the system, pumping the refrigerant and raising its pressure. This process increases the temperature of the gas, turning it into a high-pressure, high-temperature state.

  • Condenser

The hot, pressurised gas then flows into the condenser, another unit located outside. Here, the refrigerant releases the heat absorbed from inside your home to the surrounding air. As the heat is expelled, the refrigerant changes back into a liquid state.

  • Expansion Valve

The liquid refrigerant then passes through the expansion valve, a device that regulates its flow. As it passes through the valve, the refrigerant’s pressure drops, and it becomes a low-pressure, low-temperature liquid. This chilled liquid returns to the evaporator, and the cycle repeats.

Controlling Temperature and Humidity

Apart from cooling the air, air conditioners also play a vital role in controlling humidity levels. As warm air circulates over the evaporator coils, not only does the refrigerant absorb heat, but it also extracts moisture from the air. This dual action results in the comfortable and dry air we associate with a well-functioning air conditioner.

Energy Efficiency and Environmental Impact

Understanding how air conditioners work also sheds light on their energy efficiency and environmental impact. Newer models often boast advanced technologies and environmentally friendly refrigerants that contribute to reduced energy consumption and a smaller carbon footprint.


The seemingly magical transformation of warm air into a cool breeze by air conditioners is made possible by the intricate workings of the refrigeration cycle. The interplay of the evaporator, compressor, condenser, and expansion valve is the key to creating a comfortable indoor environment. As we continue to rely on air conditioning to beat the heat, being aware of the basics enhances our appreciation for these cooling marvels.

Ready to ensure your air conditioner stays in top-notch condition? Affordable Aircon Services Pte Ltd is a one-stop aircon service centre and aircon repair company specialising in expert aircon repairs to keep your cooling system running smoothly. Whether it’s a malfunctioning compressor, a leaky condenser, or any other issue in the refrigeration cycle, our skilled technicians have the know-how to bring back the cool comfort to your space.

Don’t let a faulty aircon disrupt your indoor oasis—contact us today for affordable and reliable aircon servicing that restores the magic of a refreshing breeze!

Comments are closed.