Nitrogen monoxide generator for fruit and vegetable preserving

Abstract

The invention relates to a NO generator for storing fruit and vegetable, characterized in that the NO generator comprises a gas pump, a clean air filtering device, and a flow controller, a plasma discharge reaction chamber arranged in the electromagnetic shielding cladding body, and a pair of electrodes connected to a high-voltage pulse generator, wherein the gas pump, the clean air filtering device and the flow controller are sequentially connected, and the a purifier is connected with the output terminal of the plasma discharge reaction chamber. The invention is provided with air in the atmosphere as raw material and without the need to use high-pressure NO cylinder and nitrogen and oxygen high-pressure cylinder. By regulating discharge conditions of high-frequency high-voltage pulse, NO (0 to 1800mu L / L, 3L / min of air flow) with ultra-high concentration can generate in the process of high frequency discharge, the yield of NO is much higher than prior discharge system with less NO2 harmful gas and lower ratio of NO / NO2.

Description

technical field [0001] The invention belongs to instruments and equipment for keeping fruits and vegetables fresh, in particular to a nitric oxide (NO) generating device for keeping fruits and vegetables fresh. Background technique [0002] Since the Israeli botanist Leshem first discovered the synthesis of nitric oxide (NO) in plants in 1996, NO has attracted the attention of the plant physiology community. So far it has been found that it has effects on physiological processes such as plant respiration, light morphology, seed germination, leaf growth, and stomatal movement. In 1997, Leshem et al. found through research on horticultural products that postharvest fruits can produce NO. As the fruits mature and age, the levels of NO in tissues gradually decrease, and the levels of ethylene gradually increase. Further studies have confirmed that plants can delay the maturation and aging of tissues by increasing the synthesis of NO, inhibiting the synthesis of ethylene or redu...

AI Technical Summary

Problems solved by technology

For the dilution method of high-pressure gas cylinders, in the actual production process, the following problems are likely to occur: 1. The complexity and safety issues of storage, transportation and operation of high-pressure gas cylinders are especially not suitable for use in China's vast rural fruit and vegetable production areas; 2. high cost

The use of high-pressure gas to keep fruits and vegetables fresh is a consumable product. At present, it can only be purchased in some large and medium-sized cities with strong scientific and technological capabilities.

And for adopting chemical synthesis method, then there are following problems: 1, the operation security problem of chemical reaction

It can be seen that its inherent disadvantages are: 1. The use of completely dry air is impossible for actual production; 2. The use of pure nitrogen and oxygen results in the use of high-pressure cylinders, which is not conducive to the promotion of rural production areas; 3. NO Yields are too low to handle large volumes of fruit and vegetable products

4. NO 2 / (NO+NO 2 ) ratio is too high, it will have adverse effects on postharvest physiology of fruits and vegetables

5. The cost is high, the system cannot get rid of the nitrogen and oxygen measurement system, and cannot be used at low cost

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