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Instant pumpkin powder solar-assisted heat pump drying method

A heat pump drying and solar energy technology is applied in the field of food drying and processing, which can solve the problems of high energy consumption and poor quality of finished products, and achieve the effects of high drying efficiency, good quality and good drying continuity.

Inactive Publication Date: 2017-12-22
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, common pumpkin drying methods include hot air drying, spray drying, microwave drying and microwave vacuum drying, etc., but they have disadvantages such as high energy consumption or poor quality of finished products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of instant pumpkin powder solar energy auxiliary heat pump drying method, comprises the following steps:

[0019] Step 1: select ripe fresh pumpkins with uniform size, no damage by diseases and insect pests, and no damage, with a water content of 85 wt %;

[0020] Step 2: Clean and disinfect the selected fresh pumpkin with 100ppm (0.01% (w / v) sodium hypochlorite solution, dry the surface moisture, cut it in half along the central axis of the pumpkin, and remove the skin, seeds, and pulp. Cut the pumpkin into uniform pumpkin slices with a small slicer made in the laboratory;

[0021] Step 3: Accurately weigh a certain amount of pumpkin slices with uniform shape, and perform ultrasonic-blanching pretreatment under the conditions of ultrasonic temperature of 70°C, ultrasonic power of 300 W, ultrasonic frequency of 35 kHz, and ultrasonic treatment time of 3 min; among them, The solid-liquid ratio of pumpkin slices and hot water is 1:18, and the unit of solid-liquid ...

Embodiment 2

[0030] A kind of instant pumpkin powder solar energy auxiliary heat pump drying method, comprises the following steps:

[0031] Step 1: Select ripe fresh pumpkins with uniform size, no pests and diseases, and no damage, with a water content of 95 wt %;

[0032] Step 2: Clean and disinfect the selected fresh pumpkin with 100ppm (0.01% (w / v) sodium hypochlorite solution, dry the surface moisture, cut it in half along the central axis of the pumpkin, and remove the skin, seeds, and pulp. Cut the pumpkin into uniform pumpkin slices with a small slicer made in the laboratory;

[0033] Step 3: Accurately weigh a certain amount of pumpkin slices with uniform shape, and perform ultrasonic-blanching pretreatment under the conditions of ultrasonic temperature 70 ℃, ultrasonic power 300 W, ultrasonic frequency 35 kHz, and ultrasonic treatment time 3 min; among them, pumpkin The solid-liquid ratio of tablets and hot water is 1:18, and the unit of solid-liquid ratio is g / mL;

[0034] Ste...

Embodiment 3

[0038] A kind of instant pumpkin powder solar energy auxiliary heat pump drying method, comprises the following steps:

[0039] Step 1: Select mature fresh pumpkins with uniform size, no pests and diseases, and no damage, with a moisture content of 85 wt % to 95 wt %;

[0040] Step 2: Clean and disinfect the selected fresh pumpkin with 100ppm (0.01% (w / v) sodium hypochlorite solution, dry the surface moisture, cut it in half along the central axis of the pumpkin, and remove the skin, seeds, and pulp. Cut the pumpkin into uniform pumpkin slices with a small slicer made in the laboratory;

[0041]Step 3: Accurately weigh a certain amount of pumpkin slices with uniform shape, and perform ultrasonic-blanching pretreatment under the conditions of ultrasonic temperature 70 ℃, ultrasonic power 300 W, ultrasonic frequency 35 kHz, and ultrasonic treatment time 3 min. Wherein, the solid-liquid ratio of pumpkin slices and hot water is 1:18, and the unit of solid-liquid ratio is g / mL;

...

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PUM

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Abstract

The invention discloses an instant pumpkin powder solar-assisted heat pump drying method. The method takes fresh pumpkins as a raw material and comprises the following steps: carrying out selection, pretreatment and ultrasonic wave-blanching pretreatment, then achieving safety water content by virtue of a solar-assisted heat pump combined drying method, enabling water content of dry basis to be below 10wt%, and finally carrying out drying kinetic analysis and process optimization study. The method disclosed by the invention applies the ultrasonic wave-blanching pretreatment method and a solar-assisted heat pump combined drying technique and has the advantages of good enzyme deactivation effect, shortened drying time, energy conservation, low cost, easy operation and no pollution, loss of nutrient substances and influence on color of pumpkin powder can be reduced to the utmost extent, related qualities such as color, fragrance and taste of instant pumpkin powder are maintained, large-scale energy-saving processing and production are realized, and the pumpkin powder which is full of nutrients and fine in taste is obtained.

Description

technical field [0001] The invention belongs to the technical field of food drying and processing, and in particular relates to a solar-assisted heat pump drying method for instant pumpkin powder. Background technique [0002] pumpkin( Cucurbita moschata Duch) is a plant of the genus Cucurbitaceae Cucurbita, mainly including dozens of varieties such as Miben pumpkin, Dongsheng pumpkin, and Cui Li pumpkin. It originated in the American continent, but it has strong stress resistance and good cultivation characteristics. Widely planted in the range. Miben pumpkin, also known as Chinese pumpkin, has a wide range of planting and its output ranks second in the world. Pumpkin is rich in nutrients and has very important nutritional and medicinal values. At the same time, in recent years, people have gradually discovered that pumpkin can not only be used as a food substitute, but also has certain therapeutic value, so it is gradually loved by people, and the market The demand gra...

Claims

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Application Information

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IPC IPC(8): A23L5/10A23L5/30A23L19/00
CPCA23L19/01A23L5/10A23L5/32
Inventor 邓凯波代亚萍郑宝东陈团伟郑亚凤
Owner FUJIAN AGRI & FORESTRY UNIV
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