How Does The Hot Air Circulation Oven Achieve Uniform Drying?

The hot air circulation oven is mainly composed of a heating system, a circulating air system, a temperature control system, and a box structure. The heating system heats the air to the set temperature through electric heating tubes or steam heat exchangers; the circulating air system is driven by a centrifugal fan, which evenly distributes the hot air with a flow rate of 16,500 - 24,000 m³/h and a circulation frequency of 23 - 34 times per minute to all corners of the box; the temperature control system uses high-precision instruments (with an accuracy of ±1°C and a fluctuation of ≤±2°C) to monitor and adjust the temperature in real time, ensuring that the temperature difference within the box is kept within a very small range; the box is made of carbon steel or stainless steel, and the internal design features a parallel air supply structure to avoid hot air short-circuiting, further enhancing the uniformity of drying.

This equipment is suitable for scenarios that require rapid drying and have high requirements for temperature uniformity. For example, in the food industry, it is used for dehydrating vegetables and dried fruits; in the pharmaceutical industry, it is used for drying medicinal herbs and pills; in the chemical industry, it is used for dehydrating powders and granular materials. During operation, the following points should be noted: Firstly, set the temperature according to the material characteristics (usually not exceeding the material's tolerance limit); secondly, control the drying speed by adjusting the circulating air volume; finally, monitor the equipment stability through the fluctuation parameter of the instrument. The equipment supports customized processing and can be adjusted to the box volume and air duct layout according to the material size.

Compared to traditional ovens, the hot air circulation oven performs better in terms of drying efficiency, uniformity, and energy consumption control. Its parallel air supply design eliminates temperature dead zones within the oven, preventing localized overheating or incomplete drying of the materials; the adjustable circulation air volume and frequency enable it to meet the drying requirements of different materials (such as fragile materials need to reduce wind speed); the set accuracy of the instrument at ±1℃ can reduce changes in material quality caused by temperature fluctuations.