Convection hot air dryers, How do they work?

When talking about dryers, people usually think of convection dryers because this type of machine has many advantages in terms of drying quality and cost savings. However, few people understand the in-depth principles of convection, so in this short article, Mactech will analyze this issue to help readers understand it better.

All of Mactech’s current multi-purpose (heat drying) dryers use convection drying because this is the most optimal principle for controlling temperature in a hot drying chamber, ensuring uniform temperature distribution throughout. Convection is the natural movement of hot air within a given space; this is a natural phenomenon, so convection temperature control takes advantage of this. However, to achieve uniform temperature in the drying chamber, it is necessary to combine convection and circulation temperature control.

Recirculation involves reusing all or most of the existing airflow within the drying chamber, as the pre-heated airflow provides a stable and efficient environment. This allows for better, easier, and more precise control of temperature uniformity throughout the machine.

Convection refers to the arrangement of airflow within the machine in an upward direction. Therefore, typically, the air blown from Mactech dryers comes from both sides, with air vents distributed from top to bottom at varying densities to ensure uniform airflow pressure. Mactech’s hot air dryers all have air intake vents at the top and air outlets on both sides, creating a continuous, circulating, and convection airflow. Therefore, a standard convection dryer always has upward airflow.

Convection drying is suitable for common, basic products such as drying bamboo shoots, banana seeds, vegetables, common medicinal herbs, leaves, branches, fish, shrimp, powder, sliced ​​fruits, etc., and is widely used in both domestic and industrial drying applications. High-temperature dryers are all convection dryers with temperature control up to 300°C, suitable for drying electronic components, plastics, mica, transformers, metals, paint materials, etc.

Thus, through the basic information above, readers have gained a better understanding of convection dryers, their principles, and advantages. For further advice on other types of machines with various sizes and scales, please contact Mactech for more information. Thank you for learning about our products.