Refrigeration units are devices designed to remove heat from a designated area, keeping it cool. They work by circulating a refrigerant, which absorbs heat and releases it outside. Commonly used in homes and businesses, these units help preserve food, medicines, and other perishable items by maintaining low temperatures. There are various types of refrigeration units, including refrigerators, freezers, and commercial refrigeration systems. Each type serves a specific purpose, from storing groceries to cooling large quantities of products in supermarkets. These units are essential for modern living, ensuring food safety and extending the shelf life of many items.