How to choose the right drying oven?

The design of the drying oven can be either desktop or vertical. In a desktop structure, the main body and sub-body are placed side by side, with the air duct located at the back, allowing for horizontal air convection within the working chamber. On the other hand, a vertical structure places the main body and sub-body one above the other, enabling vertical air circulation inside the chamber. When choosing the size of the drying oven, it's important to consider the dimensions and number of test samples. The placement and quantity of samples directly affect temperature uniformity. If high temperature consistency is required, it’s advisable to reduce the number of samples or select a larger model to ensure better air circulation. Additionally, placing samples at least 2–3 cm away from the inner walls or air inlets helps promote even heat distribution. There are three common temperature ranges available for blast drying ovens: RT+10°C to 250°C, RT+10°C to 300°C, and 100°C to 400°C (for high-temperature models). For temperatures below 150°C, the RT+10°C to 250°C range is suitable. Between 150°C and 290°C, the RT+10°C to 300°C model is recommended. When operating between 260°C and 290°C, it’s wise to include an overheat protection device for the motor and thermal protection. For temperatures above 300°C, a high-temperature blast drying oven with a range of 100°C to 400°C should be used. Typically, the heating rate of a drying oven is around 3–5°C per minute. At lower temperatures, the rise is faster, while at higher temperatures, it slows down. Seasonal conditions also play a role—temperature increases more quickly in summer and more slowly in winter. While it's possible to increase the heating rate, doing so may lead to greater temperature overshoot during the constant temperature phase. It's essential to balance speed and stability for optimal performance.

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