Freezing-fresh-preservation processing method for whole durian fruits

A technology of freezing preservation and processing methods, which is applied in the fields of fruit and vegetable preservation, food processing, and preservation of fruits/vegetables through freezing/refrigerating, and can solve problems such as oxidative browning, durian fruit freezing damage, freezing damage, and affecting taste

Pending Publication Date: 2020-10-13
广西壮族自治区亚热带作物研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This standard is more suitable for grapes, red bayberries, lemons and other small fruits, but durian cannot be inactivated by hot water, and the fruit is thick and huge. When the temperature drops below the freezing point, there will be a large number of ice crystals in the quick-frozen durian pulp processed by this method to destroy the tissue cells. After thawing, a large amount of nutrients will be lost, and it will be oxidized and browned rapidly in the air, losing its original flavor, and it cannot reach the quality of freez

Method used

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  • Freezing-fresh-preservation processing method for whole durian fruits
  • Freezing-fresh-preservation processing method for whole durian fruits
  • Freezing-fresh-preservation processing method for whole durian fruits

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0069] Example 1

[0070] (1) Selecting and grading durians. According to the regulations of "NY / T1437-2007 Durian", they are divided into three weight classes: large (>3.0kg), medium (1.5kg~3.0kg), and small (<1.5kg) Perform grading and choose 1 small fruit weighing 1kg;

[0071] (2) Use a high-pressure dust blower to blow off the durians, dust, insects, etc. on the surface of the durian after being graded and selected;

[0072] (3) Step-wise pre-cooling of the durian after step (2) treatment: Put the durian in a pre-cooling room with a wind speed of 8m / s, and perform step-wise pre-cooling according to the parameters of 15°C for 180min, and then 0°C for 220min. The internal temperature of durian drops to 4-6℃;

[0073] (4) Perform indirect liquid nitrogen freezing on the durian processed in step (3), put the pre-cooled durian into the freezer, and the liquid nitrogen enters the freezer through the spray hole, and after vaporization, the temperature of the freezer is lowered, specifi...

Example Embodiment

[0076] Example 2

[0077] (1) Selecting and grading durians. According to the regulations of "NY / T1437-2007 Durian", they are divided into three weight classes: large (>3.0kg), medium (1.5kg~3.0kg), and small (<1.5kg) Carry out grading and choose a small fruit weighing 1.4kg;

[0078] (2) Use a high-pressure dust blower to blow off the durians, dust, insects, etc. on the surface of the durian after being graded and selected;

[0079] (3) Step-wise pre-cooling of the durian after step (2) treatment: Put the durian in a pre-cooling room with a wind speed of 8m / s, and perform step-wise pre-cooling according to the parameters of 15°C for 200min, then 0°C for 240min, so that The internal temperature of durian drops to 4-6℃;

[0080] (4) Perform indirect liquid nitrogen freezing on the durian processed in step (3), put the pre-cooled durian into the freezer, and the liquid nitrogen enters the freezer through the spray hole, and after vaporization, the temperature of the freezer is lowered,...

Example Embodiment

[0083] Example 3

[0084] (1) Selecting and grading durians. According to the regulations of "NY / T1437-2007 Durian", they are divided into three weight classes: large (>3.0kg), medium (1.5kg~3.0kg), and small (<1.5kg) Carry out grading and choose 1 medium fruit weighing 1.5kg;

[0085] (2) Use a high-pressure dust blower to blow off the durians, dust, insects, etc. on the surface of the durian after being graded and selected;

[0086] (3) Step-wise pre-cooling of the durian after the treatment in step (2): Put the durian in a pre-cooling room with a wind speed of 8m / s, and perform step-wise pre-cooling according to the parameters of 15°C for 200min, and then 0°C for 240min to make the durian The internal temperature drops to 4-6℃;

[0087] (4) Perform indirect liquid nitrogen freezing on the durian processed in step (3), put the pre-cooled durian into the freezer, and the liquid nitrogen enters the freezer through the spray hole, and after vaporization, the temperature of the freezer...

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Abstract

The invention belongs to the field of food processing and relates to a freezing-fresh-preservation processing method for whole durian fruits. According to the method, through carrying out weight grading on durian fruits and setting precooling and freezing parameters according to different weights, a cooling effect of each durian fruit can be more proper, and energy saving and consumption loweringare achieved while cooling quality is guaranteed; a respiratory action of the durian fruits is gradually decelerated by employing staged strong wind precooling, the durian fruits gradually enter a dormancy stage, cold damage and dewing caused by rapid cooling can be prevented, and meanwhile, the influence on a fresh-preservation effect due to the fact that hoarfrost is formed at a low temperaturedue to the respiratory action of the durian fruits during liquid-nitrogen freezing is also avoided; and by employing indirect liquid-nitrogen freezing, rupture caused by direct contact between the durian fruits and liquid nitrogen can be avoided, temperatures of the durian fruits can be lowered rapidly by evaporation cooling of the liquid nitrogen, an internal ice crystal forming stage is avoided,cell membranes are prevented from being destroyed, nutrients are not lost after thawing, and original flavor, mouth feel and nutritive value of food are maintained.

Description

technical field [0001] The invention belongs to the field of food processing, in particular to a processing method for frozen and fresh-keeping of whole durian fruit. Background technique [0002] Durian is planted in Hainan, Zhanjiang, Guangdong, and Southeast Asian countries such as Thailand, Malaysia, and Vietnam. It is a tropical fruit with strong seasonality. Because of its long-distance transportation and storage difficulties, it is difficult for people outside the place of origin to eat it naturally. fresh durian. The durians imported from Southeast Asian countries are generally picked before they mature, and they are further ripened after being transported to China. Compared with the naturally mature durians, there is a big difference in taste and flavor. after the product. [0003] Generally, fruit and vegetable freezing is to slowly cool down to below freezing point. Because the moisture outside the plant cells first forms ice crystals and grows up, the plant cel...

Claims

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Application Information

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IPC IPC(8): A23B7/04A23B7/055A23L5/20
CPCA23B7/04A23B7/055A23V2002/00A23L5/20A23V2200/10Y02P60/85
Inventor 黎新荣冯春梅王淋靓檀业维郝小玲李建强荣涛程三红王妍牛德宝
Owner 广西壮族自治区亚热带作物研究所
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