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Method for preserving vegetables through controlled atmosphere refrigeration

A vegetable and air-conditioning technology, which is applied in the direction of preservation of fruits/vegetables through freezing/refrigeration, fruit and vegetable preservation, food preservation, etc., can solve the problems of fresh-keeping effect to be improved, few modified-atmosphere storage bags, and single products, etc., to achieve effective Conducive to application and promotion, sufficient humidity, and prolonged fresh-keeping effect

Active Publication Date: 2022-04-08
镇江菖卓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is usually placed in a controlled atmosphere warehouse or film bag with modified atmosphere, but the product stored in the controlled atmosphere warehouse is single and the cost is high. It is mainly used for bulk commodities such as apples that need long-term storage. The application of modified atmosphere fresh-keeping in the film bag is more flexible. Adjusted atmosphere or filled with a suitable ratio of gas such as low O 2 High CO 2 To achieve the preservation effect, but there are few reports on the relationship between the characteristics of modified atmosphere storage bags and the concentration of modified atmosphere gas
[0004] In view of the above-mentioned prior art, the inventor believes that the fresh-keeping effect of the existing vegetable modified atmosphere fresh-keeping method needs to be improved

Method used

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  • Method for preserving vegetables through controlled atmosphere refrigeration
  • Method for preserving vegetables through controlled atmosphere refrigeration
  • Method for preserving vegetables through controlled atmosphere refrigeration

Examples

Experimental program
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Effect test

Embodiment 1

[0064] The types of vegetables in this embodiment are: lettuce, spinach, Shanghai greens, cabbage, Chinese cabbage, lettuce, broccoli, cauliflower, garlic sprouts, and celery; it is intended to measure the fresh-keeping effect of small packages (4kg).

[0065] A method for refrigerating and preserving fresh vegetables under controlled atmosphere, comprising the following steps:

[0066] (1) Picking and selection: Pick fresh vegetables at 6 o'clock in the morning and select them;

[0067] (2) Pre-cooling: Pre-cooling in a refrigerated environment with a temperature of 0°C and a humidity of 80% for 24 hours;

[0068] (3) The pre-cooled vegetables are quickly packed into polyethylene film bags according to the specifications of each 4kg in small packages, and they are stacked neatly. 2 Air permeability is 4500(ml / m 2 ·24h·0.1MPa), CO 2 Air permeability is 6500(ml / m 2 ·24h·0.1MPa), the thickness is 26μm;

[0069] (4) Use a modified atmosphere packaging machine to pump air for...

Embodiment 2

[0074] The types of vegetables in this embodiment are: lettuce, spinach, Shanghai green, cabbage, Chinese cabbage, lettuce, broccoli, cauliflower, garlic sprouts, celery; it is intended to measure the fresh-keeping effect of large packages (10kg).

[0075] A method for refrigerating and preserving fresh vegetables under controlled atmosphere, comprising the following steps:

[0076] (1) Picking and selection: Pick fresh vegetables at 7 o'clock in the evening and select them;

[0077] (2) Pre-cooling: Pre-cooling for 12 hours in a refrigerated environment with a temperature of 3°C and a humidity of 95%;

[0078] (3) quickly pack the precooled vegetables into polyethylene film bags of 10kg each, and put them neatly. 2 Air permeability is 12000(ml / m 2 ·24h·0.1MPa), CO 2 Air permeability is 7500(ml / m 2 ·24h·0.1MPa), the thickness is 50μm;

[0079] (4) Use a modified atmosphere packaging machine to pump air for 5 seconds into the film bag filled with vegetables;

[0080] (5) ...

Embodiment 3

[0084] The vegetable types of the present embodiment are: zucchini, bitter gourd, loofah, green bell pepper; it is intended to measure the fresh-keeping effect of the small package (4kg).

[0085] A method for refrigerating and preserving fresh vegetables under controlled atmosphere, comprising the following steps:

[0086] (1) Picking and selection: Pick fresh vegetables at 6 o'clock in the morning and select them;

[0087] (2) Pre-cooling: Pre-cooling in a refrigerated environment with a temperature of 0°C and a humidity of 80% for 24 hours;

[0088] (3) The pre-cooled vegetables are quickly packed into polyethylene film bags according to the small package of each 4kg, and they are stacked neatly. 2 Air permeability is 4500(ml / m 2 ·24h·0.1MPa), CO 2 Air permeability is 6500(ml / m 2 ·24h·0.1MPa), the thickness is 26μm;

[0089] (4) Use a modified atmosphere packaging machine to pump air for 1 second into the film bag containing the vegetables;

[0090] (5) Charge O 2 an...

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Abstract

The invention relates to the technical field of vegetable preservation, and particularly provides a method for preserving vegetables by controlled atmosphere refrigeration, which comprises the following steps: (1) picking and selecting vegetables; (2) precooling; (3) the vegetables are put into a film bag meeting the ventilation requirement; (4) exhausting air; (5) filling O2 and / or CO2 gas into the film bag for modified atmosphere packaging; (6) sealing; and (7) refrigerating. According to the method for preserving the vegetables through controlled atmosphere refrigeration, field heat of the vegetables is removed through pre-cooling, and the respiration and transpiration of the harvested vegetables are slowed down; the film bag meeting the ventilation requirement is adopted, so that gas in the bag is in dynamic balance, the respiration rate of vegetables can be reduced, and the basic metabolism requirement can be met; by optimizing the thickness of the thin film bag and the proportion of gas in the thin film bag, the humidity in the bag is sufficient, and the fresh-keeping period of the vegetables is greatly prolonged; and the fresh-keeping effect is better ensured by storing under a proper refrigeration condition.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping vegetables, in particular to a method for fresh-keeping vegetables under controlled-atmosphere refrigeration. Background technique [0002] Vegetables are rich in vitamins, calcium, magnesium, potassium and other minerals, and also rich in dietary fiber. Eating vegetables regularly can help control weight and prevent cardiovascular and cerebrovascular diseases, so vegetables are deeply loved by consumers. However, due to the vigorous respiration and water evaporation of vegetables, metabolic disorders occur soon after harvesting, which is manifested as yellowing, wilting and spoilage. Therefore, the research on storage and preservation technology of vegetables has become an urgent problem to be solved in its production, transportation and sales. [0003] There are many ways to keep vegetables fresh, mainly divided into mechanical refrigeration and controlled atmosphere refrigeration. Contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/148A23B7/04
Inventor 甄锡
Owner 镇江菖卓科技有限公司
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