The Fridge - How It Works

  • Basic Training


  • How a Refrigerator Works

    Have you ever wondered how your fridge works? Watch the video or read below to learn the basics of refrigeration, familiarize yourself with a refrigerator's main components, and discover what happens to refrigerant as it moves throughout the refrigerator system.

  • What a Refrigerator Does

    In order to keep food fresh, a low temperature must be maintained in the immediate environment to reduce the reproduction rate of harmful bacteria. A refrigerator works to transfer heat from inside to outside, which is why it feels warm if you put your hand on the back side of fridge near the metal pipes - you'll find out how that works in a bit.


  • What Are a Refrigerator's Main Components?

    1. Compressor

    The compressor is the "heart" of a refrigerator. It circulates the refrigerant throughout the system and adds pressure to the warm part of the circuit, and makes the refrigerant hot. It's similar to when you are pumping air into a bicycle tube - you can sense a heat increase in the pump while you compress the air.

    2. Condensor

    The condenser sits on the back of a refrigerator, and is likely quite dusty. Inside, the refrigerant is cooled down and condenses, meaning it turns from a gas back into a liquid.

    3. Evaporator

    The evaporator is located inside a refrigerator and is the part that makes the items in the refrigerator cold. As the refrigerant turns from a liquid into a gas through evaporation, it cools the area around it, producing the proper environment for storing

    4. Capillary Tube

    The capillary tube is a thin piece of tubing that serves as an expansion device. The liquid refrigerant is routed through the capillary tube and sprayed into the low-pressure environment of the evaporator.

    5. Thermostat

    The thermostat controls the cooling process by monitoring the temperature and then switching the compressor on and off. When the sensor senses that it's cold enough inside a refrigerator, it turns off the compressor. If it senses too much heat, it switches the compressor on and begins the cooling process again.

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