A method for heat pump drying bellflower

Abstract

The invention discloses a method for drying platycodon root by using a heat pump. The method comprises the following steps of removing the neck of fresh platycodon grandiflorus, cleaning and air-drying the surface of platycodon root (the root is reserved); cutting the platycodon root of which the surface is air-dried into strips of 80 to 100 mm, tiling on a net belt, conveying to a drying chamber, heating low-temperature air by a fan to high-temperature low-humidity air of which the temperature is 70 to 80 DEG C and the humidity is 45 to 50%, sending the high-temperature low-humidity air to the drying chamber so as to heat the platycodon root strips, dehumidifying and heating low-temperature high-humidity air of which the temperature is 45 to 55 DEG C and the humidity is 60 to 70% at an outlet of the drying chamber at the same time, and sending the dehumidified and heated low-temperature high-humidity air to the drying chamber for circulation; packaging the dried platycodon root strips, so as to obtain dry finished products of the platycodon root. The method for drying the platycodon root by using the heat pump has the advantages of low energy consumption, short time and thoroughness in drying, and the color of the original platycodon root can be kept to the maximum.

Description

technical field [0001] The invention belongs to the technical field of wild vegetable drying, and in particular relates to a heat pump drying method for bellflower. Background technique [0002] Campanulaceae: A perennial herb with a stem height of 20-120 cm, usually glabrous, occasionally densely covered with short hairs, unbranched, with few upper branches. The leaves are all in whorls, some are in whorls to all are alternate, sessile or have a very short stalk, the leaves are ovate, ovate-elliptic to lanceolate, the leaves are ovate or ovate-lanceolate, the flowers are dark blue or dark blue Purple and white, can be used as ornamental flowers. Produced in Northeast China, North China, East China, and Central China provinces, it is often pickled as pickles in Northeast China, and is used to make kimchi in the Korean Peninsula; its roots can be used as medicine, and have cough and phlegm, hypoglycemic, and anti-inflammatory effects. Clinically There are also applications,...

AI Technical Summary

Problems solved by technology

The natural cooling method, commonly known as sun-drying and air-drying, is simple, convenient and low-cost, but it is easily restricted by natural conditions, especially in rainy weather, the drying process is prolonged and the quality of dried products is reduced.

The artificial drying method generally uses drying room drying and oven drying, but in the drying process, it is easy to have problems such as uneven drying, low heat utilization rate, and long drying time, and the higher drying temperature in the oven is harmful to the bellflower. Nutrients are destroyed, vitamin loss is large