Solar fruit and vegetable hot air vacuum combined drying equipment and drying method

Abstract

The invention discloses solar fruit and vegetable hot air vacuum combined drying equipment and a drying method. The solar fruit and vegetable hot air vacuum combined drying equipment mainly comprises an air pre-heater, an intelligent controller, a solar water heater, a vacuum pump, a water catcher, a drying box, a hot air auxiliary heater, a draught fan and the like. A 'hot air-vacuum' combined drying technology is adopted, not only can the advantages of high drying efficiency and good economy of 'hot air' be displayed, but also the advantages of dryness, sanitation, sterilization, freshness preservation, low temperature, high efficiency and the like 'vacuum' can be utilized, so that not only can the final product which is dried maintain the original color, flavor, taste and appearance, but also various physical activity nutrients in fruit and vegetables can be best preserved; solar energy serves as a main drying heat source, so that solar radiant energy can be fully utilized, a lot of conventional energy can be saved, energy is saved, environment is protected and economic benefits are significant; and an automatic control technology is adopted, so that the automation degree of the equipment is high, and the operation is simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of drying and processing of fruits and vegetables, and in particular relates to a solar-powered fruit and vegetable hot air vacuum combined drying equipment, and also relates to a drying method using the above-mentioned equipment. Background technique [0002] Fruits and vegetables are typical heat-sensitive materials, and their nutrients are easily lost with the increase of drying temperature. At the same time, fruits and vegetables contain a lot of water, so drying and dehydrating fruits and vegetables is a large energy-consuming and time-consuming operation. In the drying and dehydration process of fruits and vegetables, how to reduce energy consumption, improve drying efficiency and preserve their nutrients are the three major difficulties that must be overcome in the deep processing of fruits and vegetables. At present, the main processing method of fruit and vegetable drying is conventional hot air dry...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a combined solar-powered hot air vacuum drying equipment for fruits and vegetables, which solves the problems of low quality, high pollution, high energy consumption and low efficiency of traditional vacuum freeze drying of fruits and vegetables.

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