On July 4, Guoxin delivered three sets of medium-sized drying rooms to Liaoning Province. The customer ordered these sets of leaves dryer with heat pump as heat source.

Guoxin has rich experience in leaves drying. Harvest when the branches and leaves are lush, spread it on the ground or hang it in a ventilated place to dry in the shade, and pick off the leaves after drying. The leaves are mostly shriveled and curled, the intact ones are oval when flattened, the apex is long pointed or acute, the base is rounded or broadly cuneate, the margin is crenellated, the two sides are purple or the top is green, and the lower surface has many pit-like adenosquam , The leaves are green on both sides, dark green or purplish with rounded serrations. Petiole purple or purple-green, brittle. The twigs are purple-green, with marrow in the middle of the section, fragrant and slightly pungent in taste. The leaves are complete, purple in color and strong in aroma.



Leaf drying process steps:
In the process of drying leaves with an air source heat pump dryer, there are several points that need to be noted and considered.

First of all: the unit volume of leaves is large, light weight, and the dehydration rate is usually 80-85%. Intensive stacking will result in the situation that the wind cannot penetrate. At this time, the outer perilla is completely dry, but the inner perilla is not. It is still fresh, so the perilla should not be piled up when drying, and attention should be paid to turning it in time during the drying process to allow the hot air to penetrate the perilla leaves more evenly.

Second, the leaves should pay attention to the temperature control during the drying process. To ensure that the color does not change after drying, pay attention to the fixed temperature and color in the early stage of drying. The initial temperature should not be set too high, usually at 50 degrees. Yes, the drying temperature can be appropriately increased later. Of course, if you do not consider the appearance and just want to shorten the time, the temperature can be raised to more than 60 degrees to shorten the drying time, but if you want to have good appearance and quality, it is recommended to still The flavor and color of perilla are better when dried at low temperature.

Third, the drying of leaves pursues efficiency. After all, the price of dried perilla is not too high, so how many fresh leaves can be dried in each batch is particularly important, so in the drying room How to design leaf placement and installation tools is an important issue.