There are many factors that affect fruit and vegetable dryers, four of which are very critical, let's take a look at them.
1. Heat energy is the driving factor of fruit and vegetable drying and is the key to determining the production capacity of equipment. The heat energy is too small and the drying cycle is long, which may affect the quality of the finished product and increase the drying cost; The meeting causes waste of heat energy and increases the cost of drying, and scientific thermal energy configuration is the prerequisite for achieving high-quality drying operations.
2. Drying area is the key factor that determines the drying speed, drying quality and drying cost. The area is too small, forming a situation of large horse-drawn carts. It will inevitably lead to an increase in the thickness of the accumulation, insufficient heat exchange, poor drying uniformity, reduced drying speed, increased labor costs, and even affect the quality of drying products; The drying area is too large, forming a situation of small horse-drawn carts. The heat exchange is insufficient, the energy efficiency ratio is significantly reduced, and the energy consumption cost of the drying product is significantly increased.
3. Air volume and wind speed is the indicator of drying media, and it is also an important factor to determine the drying speed and drying product quality. The air volume directly affects the drying temperature and affects the preservation of the drying quality; The wind speed directly affects the drying speed, because the higher the wind speed, the better the penetrating force, it is easy to achieve temperature balance adjustment within a certain distance, and the surface of the material is easy to form negative pressure, reduce the internal water evaporation resistance, and accelerate the evaporation speed. However, the wind speed is too high and the heat exchange is insufficient, which will inevitably lead to excessive energy consumption and increase processing costs, on the contrary, the penetration power is reduced, which directly affects the drying uniformity and the quality of the drying product. Therefore, reasonable air volume, wind speed configuration and conveying are important indicators to measure whether the drying equipment is advanced.
4. Another factor affecting the operation results of the fruit and vegetable dryer is the relative humidity of the drying medium, excessive humidity, reduced drying speed, and even affect the internal quality of the dried product, such as color and shape; Too little humidity will lead to insufficient heat exchange, increased cost, too fast drying speed in the later stage of drying, large damage to the product and shape, affecting economic benefits, more likely due to surface water evaporation too fast, internal water (especially the core part) evaporation is insufficient, resulting in mold during transportation and storage.
