Uploaded August 2026 | Updated September 2026, 2 weeks ago
A refrigerator may feel like a machine that creates cold air, but that is not quite what is happening. Instead, it uses a constantly circulating refrigerant to collect heat from inside the compartment and release it into the surrounding room.
The process begins when the refrigerant is compressed into a hot, high-pressure gas. It then travels through condenser coils, where it releases heat and changes into a high-pressure liquid. After passing through an expansion valve, its pressure and temperature drop dramatically.
The chilled refrigerant then moves through coils inside the refrigerator, absorbing energy from the food and air around it. That heat is carried away before the cycle begins again.
This repeating process explains why the back of a refrigerator can feel warm while everything inside remains cold. Refrigeration is not really about producing cold. It is about controlling pressure, changing the state of a refrigerant, and moving heat from one place to another.
A refrigerator may feel like a machine that creates cold air, but that is not quite what is happening. Instead, it uses a constantly circulating refrigerant to collect heat from inside the compartment and release it into the surrounding room.
The process begins when the refrigerant is compressed into a hot, high-pressure gas. It then travels through condenser coils, where it releases heat and changes into a high-pressure liquid. After passing through an expansion valve, its pressure and temperature drop dramatically.
The chilled refrigerant then moves through coils inside the refrigerator, absorbing energy from the food and air around it. That heat is carried away before the cycle begins again.
This repeating process explains why the back of a refrigerator can feel warm while everything inside remains cold. Refrigeration is not really about producing cold. It is about controlling pressure, changing the state of a refrigerant, and moving heat from one place to another.
