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Dried purple sweet potato and processing method thereof

A processing method, the technology of dried purple sweet potato, which is applied in the field of food processing, can solve the problems that have not yet been reported on the combined drying technology of solar-assisted heat pumps, etc., and achieve the effects of enhancing market competitiveness, good energy-saving effect, and bright color

Inactive Publication Date: 2014-06-25
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant research report on the drying and processing of purple sweet potato with solar assisted heat pump combined drying technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A processing method of dried purple sweet potato, comprising the following steps:

[0021] 1) Selection and cleaning: select fresh purple sweet potatoes with uniform size, uniform color, no pests and no damage, and wash them with running tap water;

[0022] 2) Peeling and cutting into strips: Peel the washed purple sweet potato manually and cut into strips of 5mm×4mm×5cm;

[0023] 3) Sulfur-free color protection: place strips of purple sweet potato in a sulfur-free color protection agent for 90 minutes;

[0024] 4) Steam precooking: Drain the color-protected purple potatoes and steam for 5 minutes;

[0025] 5) Combined drying with solar energy-assisted heat pump: The pre-cooked purple potato chips are dried with solar-assisted heat pump, supplemented by an intelligent control system, which can automatically control the heating, cooling, dehumidification and other operations of the drying process. The combined drying conditions are: slicing Thickness is 5.84 mm, loadin...

Embodiment 2

[0031] A processing method of dried purple sweet potato, comprising the following steps:

[0032] 1) Selection and cleaning: select fresh purple sweet potatoes with uniform size, uniform color, no pests and no damage, and wash them with running tap water;

[0033] 2) Peeling and cutting into strips: Peel the washed purple sweet potato manually and cut into strips of 5mm×4mm×5cm;

[0034] 3) Sulfur-free color protection: place the striped purple sweet potato in a sulfur-free color protection agent for 20 minutes;

[0035] 4) Steam precooking: Drain the color-protected purple potatoes and steam precook for 10 minutes;

[0036] 5) Combined drying with solar energy-assisted heat pump: The pre-cooked purple potato chips are dried with solar-assisted heat pump, supplemented by an intelligent control system, which can automatically control the heating, cooling, dehumidification and other operations of the drying process. The combined drying conditions are: slicing Thickness 2 mm, l...

Embodiment 3

[0042] A processing method of dried purple sweet potato, comprising the following steps:

[0043] 1) Selection and cleaning: select fresh purple sweet potatoes with uniform size, uniform color, no pests and no damage, and wash them with running tap water;

[0044] 2) Peeling and cutting into strips: Peel the washed purple sweet potato manually and cut into strips of 5mm×4mm×5cm;

[0045] 3) Sulfur-free color protection: place the striped purple sweet potato in a sulfur-free color protection agent for 100 minutes;

[0046] 4) Steam precooking: Drain the color-protected purple potatoes and steam for 8 minutes;

[0047] 5) Combined drying with solar energy-assisted heat pump: The pre-cooked purple potato chips are dried with solar-assisted heat pump, supplemented by an intelligent control system, which can automatically control the heating, cooling, dehumidification and other operations of the drying process. The combined drying conditions are: slicing Thickness 6 mm, loading d...

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Abstract

The invention discloses a dried purple sweet potato and a processing method thereof, belonging to the field of a food processing technology. The dried purple sweet potato is prepared form fresh purple sweet potatoes, and the method comprises the steps of selecting the fresh purple sweet potatoes, cleaning, peeling and cutting into strips; after that, carrying out sulfur-free color protection treatment and steam pre-cooking treatment; carrying out combined drying by a solar-assisted heat pump until the water content of the purple sweet potatoes is 20%-30%; finally, cooling, packaging and storing to obtain the dried purple sweet potato. The processing method has the advantages of having a good energy-saving effect, being low in operation cost, high in drying quality, convenient to operate, free from pollution, capable of continuously processing all through the year, etc; the flavor, the color and the related quality of the dried product are maintained to the utmost extent; the processing method has obvious advantages especially for the drying of heat sensitive materials; the prepared dried purple sweet potato product is bright in color, attractive in appearance and good in nutritional ingredient maintenance, thus improving the market competitiveness of the dried purple sweet potato product.

Description

technical field [0001] The invention belongs to the technical field of food processing, and relates to a dried purple potato and a processing method thereof. In particular, it relates to a processing method for producing dried purple sweet potato by using a solar-assisted heat pump combined with drying technology. Background technique [0002] In addition to the nutrients of ordinary sweet potatoes, purple potatoes are also rich in anthocyanins, selenium, and iron, which have higher nutritional and health value than ordinary sweet potatoes. However, due to the high water content (65-80%) and rich nutrients of fresh purple sweet potatoes, they are susceptible to microbial infection after harvesting and are not resistant to storage. Dried purple sweet potatoes are processed by drying technology to solve the problem of fresh purple sweet potatoes after harvest. One of the most important ways, it has the characteristics of large amount of fresh fruit processing, fast speed, and...

Claims

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Application Information

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IPC IPC(8): A23L1/214A23L19/10
CPCY02A40/924A23L19/10
Inventor 陈团伟康彬彬陈绍军秦波张良清林河通吴春剑陈慧斌
Owner FUJIAN AGRI & FORESTRY UNIV
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