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Box-packed fruit and vegetable low-temperature plasma airflow type cold sterilization device

A low-temperature plasma and plasma technology, which is used in fruit and vegetable preservation, food preservation, food science, etc., can solve the problems of limited sample shape, limited size of packaged products, poor cold sterilization effect, etc. Reduce pretreatment steps and reduce the effect of cross-contamination

Pending Publication Date: 2021-08-10
南京苏曼等离子工程研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Invention patent CN209676565U (a high-voltage electric field low-temperature plasma cold sterilization core device) and invention patent CN104126641A (fresh meat high-voltage electric field plasma synergistic nano-photocatalytic sterilization and preservation method) both involve high-voltage electric field dielectric blocking low-temperature plasma, but only adapt to After packaging, the product is cold sterilized, and there are certain restrictions on the size of the packaged product. Generally, the effect of cold sterilization on larger sizes (the height of the packaging box is greater than 80mm) is very poor.
Boxed fruit cannot achieve effective sterilization
[0004] In addition, the invention patent ZL201410347682.3 (a high-voltage electric field low-temperature plasma synergistic nano-material sterilizing and fresh-keeping method for fresh meat) points out that the product must be packaged in a modified atmosphere before plasma treatment, and the shape of the sample is limited, requiring Guarantee a certain flatness, which brings limitations to the application of plasma cold sterilization technology

Method used

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  • Box-packed fruit and vegetable low-temperature plasma airflow type cold sterilization device
  • Box-packed fruit and vegetable low-temperature plasma airflow type cold sterilization device
  • Box-packed fruit and vegetable low-temperature plasma airflow type cold sterilization device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take 100 μL of 104 CFU / mL E. coli suspension and add it on the durian skin with a size of 5*5 cm after being sterilized by 0.1% hypochlorous acid for 10 minutes, and dry it at room temperature before use. Paste the dried durian skin on the upper, middle and lower parts of the durian respectively, and pass through the low-temperature plasma airflow cold sterilization device without deflectors and with deflectors, respectively, with a working voltage of 18kV and a working frequency of 20kHz for 5 minutes. After being sterilized, seal the durian in a plastic bag and let it stand for 1 hour, then cut it into uniform pieces with a size of 1*1cm, put it in a sterile homogeneous bag, beat it for 1 minute, and set it aside. The antibacterial effect was determined by plate counting method. See Table 1 for the data on the sterilization results of different positions of durian with and without deflectors installed.

[0046] Table 1

[0047]

[0048] In Table 1, the data in th...

Embodiment 2

[0050] Take 100 μL of 104 CFU / mL E. coli suspension and add it on the durian skin with a size of 5*5 cm after being sterilized by 0.1% hypochlorous acid for 10 minutes, and dry it at room temperature before use. The dried durian skin is pasted on the upper, middle and lower parts of the durian, and then the durian is put into the carton, and the core technology device of low-temperature plasma airflow cold sterilization with deflectors is added respectively. The working voltage is 18kV and the working frequency is 20kHz. Treat for 2 minutes, 5 minutes, and 10 minutes; after sterilization, seal the durian in a plastic bag and let it stand for 1 hour, then cut it into uniform blocks of 1*1cm size, put it in a sterile homogeneous bag, beat it for 1 minute, and set it aside . Take the average of the upper, middle and lower parts at each treatment time, and determine its antibacterial effect by plate counting method. See Table 2 for the sterilization results of durian with differe...

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Abstract

The invention provides a box-packed fruit and vegetable low-temperature plasma airflow type cold sterilization device which comprises a box body used for containing fruits and vegetables; a plasma airflow generator which is positioned right above the box body and is used for generating low-temperature plasma airflow; a fan which is positioned right above the plasma airflow generator and is used for blowing the low-temperature plasma airflow into the box body; a flow guide body which is installed at the bottom of the plasma airflow generator and used for guiding plasma airflow to the surfaces of fruits and vegetables. The flow guide body is enclosed into a closed structural body, the bottom of the flow guide body is open and gradually contracts towards the inner side, and the bottom of the flow guide body extends into the box body; and an air outlet gap is reserved between the outer wall of the flow guide body and the box body, so that low-temperature plasma airflow flows back upwards from the bottom of the box body and flows out from the air outlet gap. The device can significantly increase the sample size and reduce the pretreatment steps, and can be used for external sterilization of the cold-chain logistics packaging box, so that the device can meet the requirements of large-scale production of fruits and vegetables in a cold-chain link.

Description

technical field [0001] The invention belongs to the technical field of plasma sterilization, and in particular relates to a low-temperature plasma flow-type cold sterilization device for boxed fruits and vegetables. Background technique [0002] As a new international food cold sterilization technology, high-voltage electric field low-temperature plasma cold sterilization technology has the characteristics of high sterilization efficiency, no chemical residues, no pollution to the environment, and adapts to large-scale fresh food cold sterilization automatic production requirements, and low cost. Low-temperature plasma cold sterilization technology is very suitable for the large-scale development of heat-sensitive foods such as fresh preparations, to replace traditional heat sterilization to achieve the purpose of cold sterilization and preservation. [0003] Invention patent CN209676565U (a high-voltage electric field low-temperature plasma cold sterilization core device) a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/144
CPCA23B7/144
Inventor 章建浩万京林盛孝维沈德红徐龙
Owner 南京苏曼等离子工程研究院有限公司
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