CN101036482A - Nitrogen monoxide generator for fruit and vegetable storage - Google Patents
Nitrogen monoxide generator for fruit and vegetable storage Download PDFInfo
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- CN101036482A CN101036482A CN 200710008764 CN200710008764A CN101036482A CN 101036482 A CN101036482 A CN 101036482A CN 200710008764 CN200710008764 CN 200710008764 CN 200710008764 A CN200710008764 A CN 200710008764A CN 101036482 A CN101036482 A CN 101036482A
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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
The invention belongs to the preserving fruit and vegetable utilizing instrument and equipment, particularly a kind of nitric oxide (NO) generating means that is used for preserving fruit and vegetable utilizing.
Background technology
Since Israel botanist Leshem in 1996 found that first plant intracellular nitric oxide (NO) is synthetic, NO had just caused the concern of plant physiology educational circles.It has been found that up to now it all has effect to physiology courses such as the breathing of plant, light form, seed germination, leaf growth, stomatal movements.1997, Leshem etc. can produce NO by to the discovering of gardening product after fruit is adopted, ripe and old and feeble along with fruit, and the level of NO reduces gradually in the tissue, and the level of ethene raises gradually.Studies confirm that further plant can be by improving the synthetic of NO, thus ethene suppressing synthetic or reduce tissue to the susceptibility of ethene delay to organize ripe old and feeble.Current research shows, some garden crops such as banana, tomato, persimmon, avocado, oranges and tangerines, mushroom etc. are adopted low concentration of NO (1～10 μ L/L) is stifling to be handled, the fruits and vegetables endogenous ethylene is suppressed, and ripe and aging delays to some extent, can prolong 50%～150% than shelf life compared with the control.Although NO handles fruits and vegetables and obtained certain success, how high efficiency is produced NO and is used for preserving fruit and vegetable utilizing and still belongs to blank at present in the preserving fruit and vegetable utilizing operation.
Be applied to the nitric oxide gas of preserving fruit and vegetable utilizing at present, adopt the gas cylinder dilution method usually or adopt the chemical synthesis way.These two kinds of ways exist shortcoming separately respectively.For adopting the gas cylinder dilution process, in actual production process, following problem takes place probably: the complexity and the safety issue of 1, gas cylinder storage, transportation, operation are not suitable for the fruits and vegetables place of production, Chinese vast rural area especially and use; 2, cost height.Gases at high pressure are used for preserving fruit and vegetable utilizing and belong to consumable products, only can buy in the stronger big and medium-sized cities of some science and technology strengths at present, are difficult in the fruits and vegetables place of production replenishing, and cause and adopt the cost of nitric oxide preservation method higher.And, then have following problem: 1, the processing safety problem of chemical reaction for adopting chemical synthesis process.For the present Chinese fruits and vegetables producer, grasp certain chemical operation knowledge and remain in difficulty; 2, the cost of generation systems is higher.Higher and the required equipment cost of some drug prices is higher; 3, the byproduct of reaction processing cost is higher, has the possibility that causes environmental pollution.A large amount of treatment cost of waste liquor that chemical reaction produces later are higher, and some peasants may directly topple over waste liquid for saving cost, with direct contaminated environment.
Therefore, design a kind of easy and simple to handle, low-cost nitric oxide generating means that can produce at any time and need not store, become preserving fruit and vegetable utilizing industry problem anxious to be solved.
Since 1999, Japanese scholar Namihira and Akiyama were with dry air or adopt pure nitrogen gas and oxygen is raw material, adopt the synthetic nitric oxide of method of high direct voltage pulsed discharge.They adopt DC pulse, and with spark gap switch (spark gapswitch) control impuls frequency, its impulse hunting frequency is 1.25 * 10
6Hz under the 1L/min flow velocity, has produced 300 μ L/L nitric oxides, has wherein produced higher nitrogen dioxide (NO
2) pernicious gas, its NO
2/ (NO+NO
2) be about 25%.As seen, its inherent defect has: 1, adopting the bone dry air, is impossible realize for actual production; 2, adopt pure nitrogen gas and oxygen, cause in the use and still can not break away from gas cylinder, be unfavorable for the popularization of the place of production, rural area; 3, NO output is low excessively, can't handle a large amount of fruit and vegetable foods.4, NO
2/ (NO+NO
2) ratio is too high, can cause adverse effect to postharvest fruit and vegetable physiology.5, cost height, this system can't break away from nitrogen oxygen measurement system, can't realize low-cost the use.
Summary of the invention
The objective of the invention is to provide a kind of nitrogen monoxide generator for fruit and vegetable storage, use high pressure NO gas cylinder and nitrogen, oxygen gas cylinder have been avoided, be raw material directly with the air in the atmosphere, a series of discharging conditions by the regulation and control hf and hv pulse, make NO (0～1800 μ L/L that can produce high concentration in the high-frequency discharge process, gas flow rate 3L/min), its output is far above discharge system known at present, and the NO that produces
2Pernicious gas is few, its NO/NO
2Ratio is extremely low.
The present invention constitutes like this: comprise the air pump, pure air filter, the flow controller that are connected successively, be positioned at the plasma discharge reaction cavity of electromagnetic shielding cladding body, in this plasma discharge reaction cavity, a pair of electrode that is connected with high-voltage pulse generator is installed; The output of plasma discharge reaction cavity is connected with clarifier.
The present invention directly is raw material with the air, produces the NO gas that is used for preserving fruit and vegetable utilizing, and is therefore easy to use, need not to store, easy to operate, economical and practical, is particularly suitable for the fruits and vegetables place of production, Chinese vast rural area and uses.Under civil power 220V condition, the NO concentration of generation in 0～1800 μ L/L, the NO that produces during discharge
2Account for (NO+NO
2) 8%, handle through accessory substance absorption system clarifier, can remove NO fully
2Gas, the present invention collects NO generation systems, NO
2System and gas monitoring system are in one, and volume is little, and cost is low, move easy to use.
Description of drawings
Fig. 1 system and device schematic diagram of the present invention.
Fig. 2 high frequency pulse generator schematic diagram.
Fig. 3 clarifier sketch.
Among Fig. 11, high-voltage pulse generator; 2, carrier gas; 3, flow controller; 4, plasma discharge reaction cavity; 5, point electrode; 6, flush end electrode; 7, clarifier; 8, detector; 9, product gas; 10, air pump; 11, pure air filter; 12, container; 13, air inlet pipe; 14, appendix; 15, the tube connector between two containers.
The specific embodiment
The present invention includes the air pump 10, pure air filter 11, the flow controller 3 that are connected successively, be positioned at the plasma discharge reaction cavity 4 of electromagnetic shielding cladding body, in this plasma discharge reaction cavity, a pair of electrode that is connected with high-voltage pulse generator 1 is installed; The output of plasma discharge reaction cavity is connected with clarifier 7.
Above-mentioned plasma discharge reaction cavity 4 is pipes of being made by the Teflon material with heat-and corrosion-resistant, the outer metal film of ground connection that coats of pipe is to realize electromagnetic shielding, tip-flush end the electrode structure of electrode structure in the pipe for being formed by point electrode 5 peaceful termination electrodes 6, material is wolfram steel, point electrode 5 is the tips that wolfram steel materials processing become 60 ° on top, electrode spacing can be regulated arbitrarily in 0～1cm, pure air is provided by air pump, through pure air filter 11, flow controller 3 enters the plasma discharge reaction cavity, and gas flow rate can be in 0～5L/min regulated at will; Clarifier 7 adopts the NO in the chemical method absorption product gas
2Detector 8 adopts electrochemical method, but the NO in the assay products gas, NO
2And O
2, these parts are selectable unit (SU), are mainly used in gas and NO, NO in clarifier 7 Purge gas that analysis takes place through plasma discharge reaction cavity 4
2And O
2High-voltage pulse generation loop 1, pure air filter 11, flow controller 3, plasma discharge reaction cavity 4, point electrode 5, flush end electrode 6, clarifier 7 are installed among the same casing.Detector 8 can be selected to be installed in the same casing or separately and install.
The present invention is a raw material with the air in the ambient air directly.With the certain flow rate injected system, obtain cleaned air by air pump through the micropore purifier.The high voltagehigh frequency pulse that high-voltage pulse generation loop produces is added on the point electrode 5 peaceful termination electrodes 6 and just can produces the high voltagehigh frequency arc discharge, produce high-temperature plasma, this plasma contains certain density NO gas, by regulating input voltage, electrode spacing and flow rate of carrier gas, can realize that NO is adjustable continuously in 0～1800 μ L/L scope, and the NO that monitors in plasma reactor outlet
2/ (NO+NO
2) ratio is less than 8%, can make NO after clarifier 7 absorbs
2/ (NO+NO
2) ratio is near 0.
The loop takes place as shown in Figure 2 in high-voltage pulse, comprises power supply, decompression capacitor C1, protective resistance R1, rectistack Bridge2, divider resistance R2, oscillating capacitance C2, inductance L 1, diode D1, controllable silicon SCR, high frequency transformer T and controller.Power supply is civil power 220V AC, is converted into the DC voltage with certain pulse width by rectistack Bridge2 through the decompression capacitor step-down.Controller can be according to the charging/discharging voltage control controllable silicon action of capacitor C 2, the oscillation circuit output hf and hv pulse that SCR control is made up of inductance L 1, high frequency transformer T.This pulse circuit can provide pulse width 30 μ S, the hf and hv pulse of crest voltage 13kV.
The concrete structure of above-mentioned high frequency pulse generator is: AC power is connected to the ac input end of rectifier bridge by the resistance-capacitance depressurization circuit, the output of rectifier bridge also connects a resistance, be connected to former limit one end of high-frequency ac transformer again by a LC oscillating circuit, an other end on the former limit of high-frequency ac transformer is connected with the LC oscillating circuit by a controllable silicon; The silicon controlled trigger electrode is connected with control circuit, and the secondary of high-frequency ac transformer is connected with electrode.
Above-mentioned clarifier comprises several containers that is loaded with alkali lye 12, and described container is connected with towards the air inlet pipe 13 of alkali lye and the appendix of outwards exporting 14, and the inlet end of described clarifier and outlet side are separately installed with detector 8 test probes.The operation principle of described clarifier reaches to absorb NO in the gas takes place for by finite concentration NaOH solution and the adverse current that gas takes place
2Purpose.
Native system also can select to be provided with gas monitor apparatus, analyzes NO, the NO of output gas when being used for system testing
2And O
2Concentration.Native system output gas concentration is stable, when being used for the fruits and vegetables actual production, can not select gas monitor apparatus with the saving cost, but therefore gas monitor apparatus is not integrated into equipment box owing to belong to alternative pack.
Claims (5)
1, a kind of nitrogen monoxide generator for fruit and vegetable storage, it is characterized in that: comprise the air pump, pure air filter, the flow controller that are connected successively, be positioned at the plasma discharge reaction cavity of electromagnetic shielding cladding body, in this plasma discharge reaction cavity, a pair of electrode that is connected with high-voltage pulse generator is installed; The output of plasma discharge reaction cavity is connected with clarifier.
2, nitrogen monoxide generator for fruit and vegetable storage according to claim 1, it is characterized in that: described plasma discharge reaction cavity is made by the Teflon material, and one of described pair of electrodes that is connected with high frequency pulse generator is the flush end electrode for another electrode of point electrode.
3, nitrogen monoxide generator for fruit and vegetable storage according to claim 2, it is characterized in that: described point electrode is to be made by the wolfram steel material, and its top angle is 60 °, and described flush end electrode is to be made by the wolfram steel material, its top is the plane, and two distance between electrodes are 0～1cm.
4, nitrogen monoxide generator for fruit and vegetable storage according to claim 3, it is characterized in that: the concrete structure of described high frequency pulse generator is: AC power is connected to the ac input end of rectifier bridge by the resistance-capacitance depressurization circuit, the output of rectifier bridge also connects a resistance, be connected to former limit one end of high-frequency ac transformer again by a LC oscillating circuit, an other end on the former limit of high-frequency ac transformer is connected with the LC oscillating circuit by a controllable silicon; The silicon controlled trigger electrode is connected with control circuit, and the secondary of high-frequency ac transformer is connected with electrode.
5, nitrogen monoxide generator for fruit and vegetable storage according to claim 4, it is characterized in that: described clarifier comprises that several are loaded with the container of alkali lye, described container is connected with towards the appendix of the air inlet pipe of alkali lye and outside output, and the inlet end of described clarifier and outlet side are separately installed with the detector test probe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100087645A CN101036482B (en) | 2007-03-30 | 2007-03-30 | Nitrogen monoxide generator for fruit and vegetable preserving |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100087645A CN101036482B (en) | 2007-03-30 | 2007-03-30 | Nitrogen monoxide generator for fruit and vegetable preserving |
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| CN101036482A true CN101036482A (en) | 2007-09-19 |
| CN101036482B CN101036482B (en) | 2010-12-08 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274376A (en) * | 2013-05-15 | 2013-09-04 | 江南大学 | Method and device for producing NO gas by atmosphere pressure air source micropore plasma discharging |
| CN103764274A (en) * | 2011-09-30 | 2014-04-30 | 松下电器产业株式会社 | Acidic component generator |
| CN108045766A (en) * | 2017-12-28 | 2018-05-18 | 重庆辰罡科技有限公司 | A kind of dressing sieve protective device for powder metallurgy |
| CN108497519A (en) * | 2018-04-23 | 2018-09-07 | 江苏省农业科学院 | The fresh-keeping integrated apparatus of leaf vegetables washing and detoxifying based on non-thermal plasma trap and its application method |
| CN110114307A (en) * | 2016-12-14 | 2019-08-09 | 欧利景有限公司 | For producing the nitric oxide production device and method of high concentration, low temperature |
| EP2763935B1 (en) | 2011-10-03 | 2019-12-04 | NitricGen, Inc. | Apparatus and method for generating nitric oxide in controlled and accurate amounts |
| US10946163B2 (en) | 2017-02-27 | 2021-03-16 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
| US11033705B2 (en) | 2017-02-27 | 2021-06-15 | Third Pole, Inc. | Systems and methods for ambulatory generation of nitric oxide |
| US11045620B2 (en) | 2019-05-15 | 2021-06-29 | Third Pole, Inc. | Electrodes for nitric oxide generation |
| US11479464B2 (en) | 2019-05-15 | 2022-10-25 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
| CN115724414A (en) * | 2022-11-28 | 2023-03-03 | 华中科技大学 | Device and method for preparing plasma electrodeless nitric oxide in water |
| US11691879B2 (en) | 2020-01-11 | 2023-07-04 | Third Pole, Inc. | Systems and methods for nitric oxide generation with humidity control |
| US11827989B2 (en) | 2020-06-18 | 2023-11-28 | Third Pole, Inc. | Systems and methods for preventing and treating infections with nitric oxide |
| US11833309B2 (en) | 2017-02-27 | 2023-12-05 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2288173Y (en) * | 1997-01-10 | 1998-08-19 | 金利通 | Nitrogen oxide standard solution generator |
| CN2739163Y (en) * | 2004-11-12 | 2005-11-09 | 徐汶超 | Nitrogen monoxide generating device |
-
2007
- 2007-03-30 CN CN2007100087645A patent/CN101036482B/en not_active Expired - Fee Related
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103764274A (en) * | 2011-09-30 | 2014-04-30 | 松下电器产业株式会社 | Acidic component generator |
| EP2763935B2 (en) † | 2011-10-03 | 2023-06-07 | NitricGen, Inc. | Apparatus and method for generating nitric oxide in controlled and accurate amounts |
| US11945720B2 (en) | 2011-10-03 | 2024-04-02 | NitricGen, Inc. | Apparatus and method for generating nitric oxide in controlled and accurate amounts |
| EP2763935B1 (en) | 2011-10-03 | 2019-12-04 | NitricGen, Inc. | Apparatus and method for generating nitric oxide in controlled and accurate amounts |
| US11945719B2 (en) | 2011-10-03 | 2024-04-02 | NitricGen, Inc. | Apparatus and method for generating nitric oxide in controlled and accurate amounts |
| CN103274376B (en) * | 2013-05-15 | 2015-08-12 | 江南大学 | The method of a kind of atmospheric air source micropore plasma discharge NO gas and device |
| CN103274376A (en) * | 2013-05-15 | 2013-09-04 | 江南大学 | Method and device for producing NO gas by atmosphere pressure air source micropore plasma discharging |
| CN110114307B (en) * | 2016-12-14 | 2022-09-23 | 欧利景有限公司 | Apparatus and method for producing high concentration, low temperature nitric oxide |
| CN110114307A (en) * | 2016-12-14 | 2019-08-09 | 欧利景有限公司 | For producing the nitric oxide production device and method of high concentration, low temperature |
| US11766656B2 (en) | 2016-12-14 | 2023-09-26 | Origin, Inc. | Device and method for producing high-concentration, low-temperature nitric oxide |
| US11033705B2 (en) | 2017-02-27 | 2021-06-15 | Third Pole, Inc. | Systems and methods for ambulatory generation of nitric oxide |
| US11376390B2 (en) | 2017-02-27 | 2022-07-05 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
| US11911566B2 (en) | 2017-02-27 | 2024-02-27 | Third Pole, Inc. | Systems and methods for ambulatory generation of nitric oxide |
| US11833309B2 (en) | 2017-02-27 | 2023-12-05 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
| US11524134B2 (en) | 2017-02-27 | 2022-12-13 | Third Pole, Inc. | Systems and methods for ambulatory generation of nitric oxide |
| US10946163B2 (en) | 2017-02-27 | 2021-03-16 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
| CN108045766A (en) * | 2017-12-28 | 2018-05-18 | 重庆辰罡科技有限公司 | A kind of dressing sieve protective device for powder metallurgy |
| CN108497519B (en) * | 2018-04-23 | 2023-08-15 | 江苏省农业科学院 | Leaf vegetable cleaning, detoxifying and fresh-keeping integrated device and use method thereof |
| CN108497519A (en) * | 2018-04-23 | 2018-09-07 | 江苏省农业科学院 | The fresh-keeping integrated apparatus of leaf vegetables washing and detoxifying based on non-thermal plasma trap and its application method |
| US11478601B2 (en) | 2019-05-15 | 2022-10-25 | Third Pole, Inc. | Electrodes for nitric oxide generation |
| US11479464B2 (en) | 2019-05-15 | 2022-10-25 | Third Pole, Inc. | Systems and methods for generating nitric oxide |
| US11045620B2 (en) | 2019-05-15 | 2021-06-29 | Third Pole, Inc. | Electrodes for nitric oxide generation |
| US11691879B2 (en) | 2020-01-11 | 2023-07-04 | Third Pole, Inc. | Systems and methods for nitric oxide generation with humidity control |
| US11827989B2 (en) | 2020-06-18 | 2023-11-28 | Third Pole, Inc. | Systems and methods for preventing and treating infections with nitric oxide |
| CN115724414A (en) * | 2022-11-28 | 2023-03-03 | 华中科技大学 | Device and method for preparing plasma electrodeless nitric oxide in water |
| CN115724414B (en) * | 2022-11-28 | 2024-02-09 | 华中科技大学 | Device and method for preparing plasma electrodeless nitric oxide in water |
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|---|---|
| CN101036482B (en) | 2010-12-08 |
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