At present, the heating method of the tunnel furnace which is more commonly used is hot air circulation, which mainly uses the principle of convection conduction to heat the oven to achieve drying and solidification of the workpiece. The heat source can be selected according to the user's specific conditions: electricity, steam, gas or fuel. The heat source box can also be set according to the condition of the oven: placed on the top, bottom and side. If the circulating fan that produces heat source is a special high-temperature resistant fan, it has the advantages of long life, low energy consumption, low noise and small volume.
The working principle of the tunnel furnace is generally to use the far infrared to warm the furnace, and then the interior is made of ceramic and stainless steel, so that the infrared light can shine into every corner of the furnace, and then the temperature is evenly heated to transmit the energy to object.
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The tunnel furnace is designed and manufactured by foreign advanced technology, with advanced structure, easy disassembly and assembly, and beautiful appearance. The high-tech insulation material has good heat insulation performance and strong heat preservation. The heating technology adopts far-infrared heating technology, the heating elements are arranged reasonably, and the energy consumption is low. The internal hot air circulation makes the temperature in the furnace more uniform and without holes, ensuring the quality of the oven products.
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Today's tunnel furnace is one of the important equipments in the coating production line. The temperature uniformity of the tunnel furnace is an important indicator to ensure the quality of the coating. The heating methods of the oven are: radiation, hot air circulation and radiation + hot air circulation, etc. According to the production program, the single chamber and the passage type can be divided, and the equipment forms are straight-through type and bridge type. The hot air circulation oven has good heat preservation, uniform temperature in the furnace and less heat loss. After testing, the temperature difference in the hot air circulation oven is less than ±5 degrees to reach the performance index of similar products in advanced countries.
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