A fresh-keeping device for fruits and vegetables based on nanosecond pulsed low-voltage electric field

Abstract

The invention discloses a fresh-keeping device for fruits and vegetables based on a nanosecond pulse low-voltage electric field, which includes a treatment chamber and a nanosecond pulse electric field generating device. Among them, the processing chamber includes a box body with a closed cavity and an opening at the top, and an upper cover provided at the top opening of the box body containing a copper sheet protection passage. The box body and the upper cover are fitted by a positioning component, and the electromagnetic device and copper sheet The protection circuit and the working indicator light together form a safety protection device; the nanosecond pulse electric field generating device includes a parameter-adjustable nanosecond pulse power supply and a multi-channel double electrode sealed in an insulating partition and connected to an electrode outlet post. The electric field generating device forms a nanosecond pulse electric field in the box, and the fruits and vegetables are placed in it for electric field treatment, which can not only achieve the effect of inactivating enzymes by changing the inherent electric field of fruits and vegetables, inhibit the respiration of fruits and vegetables, but also have a good cold sterilization effect. The operation method of the invention is convenient and pollution-free, and is suitable for fresh-keeping of various perishable fruits and vegetables, and has high application value.

Description

technical field [0001] The invention belongs to the technical field of fruit and vegetable preservation, and in particular relates to a fruit and vegetable preservation device based on a nanosecond pulse low-voltage electric field. Background technique [0002] To prolong the fresh-keeping period of fruits and vegetables, find ways to kill microorganisms or inhibit their activity and inactivate enzymes. Microorganisms on the surface of fruits and vegetables can cause the decay of fruits and vegetables and affect the quality of fruits and vegetables. So far, there are still many problems unsolved in the traditional fresh-keeping methods of fruits and vegetables. Physical fresh-keeping methods such as modified atmosphere fresh-keeping and decompression fresh-keeping methods require a large investment and high fresh-keeping costs; chemical fresh-keeping methods will cause corresponding chemical poisons to remain in the fruit. , the current biological preservation method is uns...

AI Technical Summary

Problems solved by technology

[0004] Commonly used electric field fresh-keeping methods are DC high-voltage electric fields. For example, Chinese Patent Document No. CN201425398 discloses a household refrigerator with high-voltage electrostatic fresh-keeping technology, and Chinese Patent Document No. CN201210511487.0 discloses a high-voltage electrostatic fruit fresh-keeping device. The high-voltage electrostatic generator controller is connected with the conductive electrode plates to form a high-voltage electrostatic field between the plates. The DC high-voltage electrostatic field generated by it can keep fruits and vegetables fresh, but the disadvantage is that high voltage is required to achieve the required electric field strength for freshness preservation. , dangerous to the operator

Due to the influence of moisture in fruits and vegetables, under the action of DC voltage, the internal electric field of fruits and vegetables is very weak, which reduces the effect of the DC electric field

At the same time, fruits and vegetables are directly in contact with the electrode plate, which increases the possibility of pollution and wear of the electrode plate, shortens the service life, and due to the electrostatic effect of the exposed plate under direct current, small solid particles will be adsorbed on the positive electrode of the electrostatic field generator. Regularly clean the electrostatic field generator

[0005] Another example is the Chinese Patent Document No. CN20160003902.X, which discloses a fresh-keeping storage method for chilled meat and an electrostatic field fresh-keeping device for fresh-keeping. Although the electrodes are not in direct contact with the sample, they are also exposed, and there are also the above problems

At the same time, the device has a unipolar plate structure without a ground electrode, which makes the surrounding metal structure have a certain floating potential, which increases the risk. In addition, there is no retracting effect of the ground electrode, and it is assumed that infinity is used as the ground electrode, so that The electric field strength in the storage space is weakened, and the energy is scattered, which affects the preservation effect

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