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Quick-frozen daylily making method

A production method, the technology of day lily, which is applied in the direction of freezing/cold preservation of fruits/vegetables, etc., can solve the problems of juice loss, browning, and hindering the development of day lily industry, and achieve the effect of easy equipment and low energy consumption

Inactive Publication Date: 2012-07-25
GUANGDONG KEQI SUPER QUICK FREEZING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing refrigeration and preservation methods for day lily can only be stored for about 20 days. Although the traditional air quick-freezing technology can greatly extend the shelf life of day lily, the loss of juice and browning after thawing are serious, which is far from satisfying the demand for freshness in domestic and foreign markets. The demand for day lily; although the dry processing method of day lily solves the problem of its perennial supply, it cannot maintain the original color, flavor and nutritional content of day lily, which hinders the further development of day lily industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of quick-frozen day lily, the steps are as follows:

[0034] Select eight-mature, non-yellowing and aging plump flower buds for further processing, gently remove the lignified flower stalks, rinse the qualified flower buds with 35°C water, drain the water, and prepare for blanching. Blanch in boiling hot water at 100°C for 15 seconds, then soak the blanched day lily in citric acid color protection solution with a mass concentration of 1% at 5°C for 60 seconds, take it out and drain the water with a shaker, Then the day lily is vacuum-packed in a single layer, and the vacuum degree is controlled to 0.8 Mpa, and then pre-cooled in a cold storage at 0°C, so that the center temperature of the day lily drops to 0-2°C, and then placed in a liquid immersion ultra-speed freezer -35 ℃ freezing liquid, quick-frozen for 10 minutes, and taken out when the center temperature reached -18 ℃, and the quick-frozen day lily that passed the inspection was quic...

Embodiment 2

[0036] A kind of preparation method of quick-frozen day lily, the steps are as follows:

[0037] Select eight-mature, non-yellowing and aging plump flower buds for further processing, gently remove the lignified flower stalks, rinse the qualified flower buds with 20°C water, drain the water, and prepare for blanching. Blanch in boiling hot water at 100°C for 20s, then soak the blanched day lily in citric acid color protection solution with a mass concentration of 1% at 5°C for 40s, remove and drain the water with a shaker, Next, the day lily is vacuum-packed in a single layer, and the vacuum degree is controlled to 0.95 Mpa, and then pre-cooled in a cold storage at 0°C, so that the center temperature of the day lily drops to 0-2°C, and then placed in a liquid immersion ultra-speed freezer -35 ℃ freezing liquid, quick-frozen for 10 minutes, and taken out when the center temperature reached -18 ℃, and the quick-frozen day lily that passed the inspection was quickly sent to the -...

Embodiment 3

[0039] A kind of preparation method of quick-frozen day lily, the steps are as follows:

[0040] Select eight-mature, non-yellowing and aging plump flower buds for further processing, gently remove the lignified flower stalks, rinse the qualified flower buds with 20°C water, drain the water, and prepare for blanching. Blanch in boiling hot water at 100°C for 20s, then place the blanched daylily in 1% NaHCO at 5°C 3 Soak in the color-protecting solution for 30s, take it out and drain the water with a shaker, then vacuum-pack the day lily in a single layer, control the vacuum degree to 0.95 Mpa, and then pre-cool it in a cold storage at 0°C to make the center temperature of the day lily Cool down to 0-2°C, then place it in the freezing liquid of a liquid immersion ultra-fast freezer at -35°C, freeze it for 5 minutes, take it out when the center temperature reaches -18°C, and quickly send the quick-frozen daylily that passes the inspection to -18°C Frozen storage in a special fr...

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Abstract

The invention belongs to the technical field of vegetable freezing and freshness preservation, and specifically relates to a quick-frozen daylily making method. The quick-frozen daylily making method comprises the steps of raw material screening, cleaning, scalding, color protecting, water draining, packaging, precooling, quick-freezing and freezing storage. According to the invention, a liquid immersion type quick-frozen technology is applied to the freshness preservation of daylily for the first time, therefore, the structure characteristics and nutritional components of daylily are kept maximumly; and through combining the scalding and the color protecting with the liquid immersion type quick-frozen technology, the problem that the previous daylily after being defrosted is easy to brown is solved; and in addition, equipment adopted in the invention is easy to control, and the method is low in energy consumption and suitable for the mass production of frozen daylily, therefore, the method creates a new way for the development of the daylily industry.

Description

[0001] technical field [0002] The invention belongs to the technical field of vegetable freezing and preservation, and in particular relates to a method for quick-freezing day lily by using a liquid immersion ultra-speed freezer. [0003] Background technique [0004] Daylily is a plant of the genus Hemerocallis in the family Liliaceae, also known as Day Lily. The edible part is young flower buds. Every 100 g of flower buds contains 2.9g of protein, 11.6g of carbohydrates, 33mg of ascorbic acid, 73mg of calcium, 69mg of phosphorus, and 1 . 4 mg, carotene 1. 17 mg, high nutritional value, is a vegetable treasure that people like to eat. Daylily is sweet and flat, has the effects of hemostasis, anti-inflammatory, diuretic, detumescence, antipyretic, calming the nerves, pain relief, etc. It can assist in the treatment of various diseases, and at the same time remove deposits in the arteries. It has special effects on cerebral artery blockage and other symptoms. Curative eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/04
Inventor 余铭崔晓浔杨公明岳希举
Owner GUANGDONG KEQI SUPER QUICK FREEZING TECH
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