How does a reefer container work?

1.Keeps the temperature cold
The refrigeration unit distributes cold air through the floor of a refrigerated container  The floor of the container has slots, also known as T-shaped covers. This T-shaped cover allows a constant supply of cold air around the shipment.
 
If you are considering using a refrigerated container, you should be aware that it cannot reduce the temperature of your goods. A refrigerated container only maintains the desired temperature. Therefore, you will have to pre-cool your cargo to the temperature you want the reefer to maintain.
 
2.The genset provides electricity
Genset is short for generating set. It provides electricity to the refrigeration unit to operate. A refrigerator is usually connected to a power source on ships. But in the case of extremely sensitive cargoes that could spoil outside a temperature range, gensets provide a back-up power source. It is best to use a refrigerator equipped with a genset to ensure the safety of the cargo.
 
3.Ventilation keeps cargo cool
The purpose of a refrigerated container is to keep the cargo cool. Fruit and vegetables release heat, water, and CO₂. If these gases are not removed, they can damage the cargo leading to uncontrolled ripening, ageing, and altered taste. For this reason, refrigerators are kept ventilated with fresh air.