Internal Evaporator in The Refrigeration Chamber

The internal evaporator is typically made of metal tubes, often copper or aluminum, which are designed in a coil or plate - like shape to increase the heat - transfer area. These tubes are surrounded by fins made of aluminum or other heat - conductive materials to enhance heat exchange. In some cases, the evaporator may be integrated into the walls or shelves of the refrigeration chamber to improve heat transfer and space utilization.

Working Principle

The internal evaporator works based on the principle of heat absorption during the phase change of the refrigerant. The low - pressure, low - temperature liquid refrigerant enters the evaporator. As it flows through the tubes, it absorbs heat from the surrounding air and the items in the refrigeration chamber. This causes the refrigerant to evaporate and turn into a vapor, while the air and the contents of the chamber are cooled. A fan is usually installed to circulate the air over the evaporator surface, ensuring efficient heat transfer and uniform cooling throughout the chamber.

Advantages

Efficient Cooling: The large heat - transfer area and the efficient heat - exchange process of the internal evaporator enable rapid and uniform cooling of the refrigeration chamber. This helps to maintain a stable low - temperature environment, which is essential for preserving the freshness and quality of the stored items.

Space - Saving Design: The integration of the evaporator within the refrigeration chamber allows for a more compact design, making better use of the available space. This is particularly beneficial in applications where space is limited, such as in household refrigerators or small - scale commercial refrigeration units.

Reduced Frost Buildup: Some internal evaporators are designed with features to minimize frost formation. For example, they may have special coatings or heating elements to prevent the accumulation of ice on the evaporator surface. This reduces the frequency of defrosting cycles, improving the overall energy efficiency and convenience of the refrigeration system.