Process for preparing dried apple by microwave hot air combined drying

Abstract

The invention discloses a process for preparing dried apple by microwave hot air combined drying. The process comprises cleaning, peeling, removing pits and slicing the pulp into apple slices; immersing the apple slices in a color protection liquid for 3-5 hours; conducting staged microwave drying and staged hot air drying after immersion; drying the apple slices till a dried apple finished product with the moisture content of less than 5% is obtained; finally conducting aseptic packaging on the dried apple. The microwave hot air combined drying is adopted. The hot air drying is easier to operate than the microwave drying, and the microwave puffing process is more optimized, so that the prepared dried apple preserves the original flavor of apples and is convenient to preserve.

Description

technical field [0001] The invention relates to the technical field of fruit processing, in particular to a process for preparing dried apples through combined drying with microwave and hot air. Background technique [0002] Dried apples, that is, apple crisps, are made by frying or other methods in a vacuum or negative pressure state to evaporate the moisture in the apples without changing the shape and color, so as to obtain products with a water content of about 5%. . It contains no coloring, no preservatives, rich in fiber, and is a pure natural snack food. [0003] Microwave drying is different from traditional drying methods, and its heat conduction direction is the same as that of moisture diffusion. Compared with the traditional drying method, it has the advantages of high drying rate, energy saving, high production efficiency, uniform drying, clean production, easy automatic control and improved product quality. [0004] Microwave drying is an internal heating me...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a process for preparing dried apples by combining microwave and hot air drying, which can make the production process of dried apples easier to operate, can control the rate of moisture entering and leaving dried apples / apple slices, and then solve the problem of drying apple slices under high-power microwaves. The gap between the internal and external water loss rate can be solved, the problem of coking phenomenon and the problem of prolonging the softening time can be solved