EP4587194A1 - Dispositif de pulvérisation d'eau ozonée en milieu agricole - Google Patents
Dispositif de pulvérisation d'eau ozonée en milieu agricoleInfo
- Publication number
- EP4587194A1 EP4587194A1 EP23790713.4A EP23790713A EP4587194A1 EP 4587194 A1 EP4587194 A1 EP 4587194A1 EP 23790713 A EP23790713 A EP 23790713A EP 4587194 A1 EP4587194 A1 EP 4587194A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray
- liquid
- gas
- nozzle
- collar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
- A61L2/16—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using chemical substances
- A61L2/22—Phase substances, e.g. smokes or aerosols
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
- B05B7/0458—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber the gas and liquid flows being perpendicular just upstream the mixing chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/044—Slits, e.g. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains
Definitions
- the present invention relates to a spraying device, in particular intended to be used in the open air, outdoors, particularly in an agricultural environment, on hectares of crops to be treated, or indoors.
- the advantage of the invention is to be able to spray a liquid loaded with gas or gaseous solute, while limiting the desorption of the gaseous solute or gas from the sprayed liquid.
- This device can more particularly spray water loaded with ozone via a nozzle, in order to carry out a treatment, whether of a phytosanitary type for crops or of a chemical type for an action on a surface to be treated.
- ozonated water diffusion devices are known for sterilization, disinfection and deodorization in industrial environments and in closed environments with a controlled atmosphere.
- ozonated water On an experimental scale, ozonated water is known for its effectiveness in combating the development of certain pathogens. Ozonated water could be an alternative to phytosanitary treatments based on synthetic products from the chemical industry. Indeed, ozonated water has a major ecological advantage in that the persistence of the ozone molecule is very low, and decomposes into dioxygen that is neutral for the environment.
- the object of the invention is to propose a solution adaptable to the agricultural environment and whose efficiency is demonstrated in the phytosanitary treatment of the plants concerned.
- the interest of the invention is to propose a technical solution which makes it possible to maintain an effective concentration of ozone in a sprayed liquid either by promoting the absorption of ozone in this liquid, and or by limiting its desorption.
- the advantage of the invention is to allow spraying of a liquid in a gaseous environment in order to increase the absorption of the gaseous solute or to limit its desorption.
- These spray conditions correspond to a difference in speed between the ejected liquid and the gas diffused around the ejected liquid, leading to friction occurring on the surface of the ejected liquid. This friction induces the transformation of the jet of liquid in the form of a liquid film into ribbons, then into ligaments which then break into relatively spherical particles in order to produce a cloud of drops.
- the invention consists of promoting the dissolution of the gas in the form of gaseous solute in the ejected liquid, in particular at the moment when the liquid is still mainly in the form of a jet, film or ligaments, and before the majority of the liquid or in the form of drops.
- the invention also aims to limit desorption of the gaseous solute (Ozone) already dissolved in the ejected liquid, in particular when this liquid is still mainly in the form of a jet, film or ligament.
- the invention also consists of limiting the presence of gas other than that of the gaseous solute around the liquid when the liquid is still mainly in the form of a jet, film or ligaments.
- the invention favors the presence of gas around the sprayed liquid in the form of a jet, film or ligaments, in order to increase the proportion of gaseous solute of this gas in the liquid.
- the subject of the invention is a spraying device, in particular for spraying ozonated water in an agricultural environment, the device comprising
- nozzle intended to be connected to a reservoir of liquid to be sprayed
- the advantage of the invention is to propose a collar which makes it possible to define a confinement chamber.
- the configuration of the nozzle and the collar are jointly determined so that the spray orifice sprays a spray whose nominal volume of the surface enveloped by this spray, inside the collar, represents a lower volume at 5% of the interior volume of the collar.
- a nozzle capable of emitting a spray of liquid distributed spatially according to an opening angle in a plane and a radial thickness transversely to this plane is selected
- Figure 1 represents an agricultural spraying diagram of a phytosanitary treatment on a vine, in which spraying by a cloud of drops is schematized, and a proportion of gas in this cloud of drops is also schematically represented by a density of black dots in every drop;
- Figure 3a represents a view of a spray diffused by a nozzle of a spraying device according to the invention
- Figure 3b represents a view of the spray of Figure 3a from an angle of view perpendicular to that of Figure 3a;
- Figure 4a represents a second device for modeling the distribution of a liquid comprising a proportion of dissolved gas according to a spraying device according to the invention
- Figure 4b represents a graph with proportions measured in gas dissolved in the liquid distributed by a device according to Figure 4a, as a function of a distance between the measurement point and a spray orifice of this liquid by a nozzle of the device according to Figure 4a;
- FIG. 7 represents a perspective view of a spraying device according to an alternative embodiment of the invention.
- FIG. 8 shows a longitudinal sectional view of a spraying device according to Figure 7;
- Figure 9 represents a perspective view in a partial longitudinal section of a spraying device according to Figure 7.
- an agricultural sprayer 1 is generally a mobile device.
- the crops being organized to facilitate the mechanization of agricultural work, the agricultural sprayer 1 is provided with means of movement 2, such as wheels 2 in the example of Figure 1, in order to facilitate the movement of the sprayer along a plantation 3 to be treated.
- the agricultural sprayer 1 is towed along furrows each carrying the plants, such as vines, to be treated.
- the agricultural sprayer 1 is intended to disperse a phytosanitary treatment, preferably in a homogeneous dose as it moves along the crops.
- the sprayer is kept at a distance from these crops during its movement, such as a distance “d” between a distribution opening 4 of the device 1 and a foot 5 of the plantation 3, measured transversely to the axis of movement of the device 1, is preferably greater than the value d minus half of an average theoretical width Ith of the plantation 3, this theoretical width being measured transversely to the axis of movement of the device 1.
- a distribution axis Y of the sprayer 1 is oriented perpendicular to a rolling direction X of this sprayer 1. The spraying is lateral to the movement.
- the agricultural sprayer is configured to ensure the formation of a cloud of drops 6 whose drops will be mainly propelled up to a distance whose value will be between [d - 14* Ith ; d + 14* Ith ]. At this distance, the lateral propulsion force of the drops is canceled under the weight of these drops, which will be deposited by gravity on the plantation 3.
- the agricultural sprayer 1 may include means for orienting the distribution opening 4 of so that the distribution axis Y can be modified, and not necessarily be oriented parallel to the ground on which the wheels are resting.
- the sprayer 1 is intended to allow joint distribution of liquid and gas, and also of gas dissolved in the liquid.
- the sprayer 1 comprises a first means of connection to a reservoir 7 of liquid. This liquid reservoir 7 can be supported by a chassis 8 on which the wheels 2 are mounted.
- the sprayer 1 comprises a second connection means to be connected to a gas production and/or storage device 9, this device possibly being a gas bottle, in which the gas is compressed.
- the gas production and/or storage device 9 is also carried by the chassis 8.
- the liquid reservoir 7 contains water, or ozonated water having a non-zero proportion of ozone.
- Gas cylinder 9 contains ozone gas. Under ambient conditions, ozone tends to naturally decompose into oxygen.
- Figure 2a represents a device for modeling a proportion of ozone (03) in a liquid film 11 sprayed by a device for preparing ozonated water and spraying it through a nozzle 10, the ozone already being dissolved in the liquid intended to be sprayed.
- the nozzle 10 is supplied by a connection means 12 to a reservoir 7 of liquid, in particular water.
- This tank 7 is itself supplied by a pipe 18 with gas supplied by an ozone generator 13.
- the ozone generator 13 can enrich the liquid with ozone continuously, in order to control and maintain a proportion P1 of dissolved ozone into the liquid to be sprayed through the nozzle.
- Figure 2b represents an evolution of the proportion P2 of ozone dissolved in the film 11, this proportion P2 is a function of a distance D of distance from the measurement relative to the nozzle 10 along an axis of distribution Y.
- This modeling confirms the observations concerning the inefficiency of treatment with sprayed ozonated water to the extent that from the first centimeters at the exit of a spray orifice 14 of the nozzle 10, a very clear drop in the proportion of dissolved ozone is observed in film 11.
- the proportion P2 of ozone dissolved in the liquid distributed is divided by 20 compared to the proportion P1 of ozone dissolved in the liquid of tank 7.
- the nozzle 10 comprises a spray orifice 14 in the form of a longitudinal slot along an axis Z, so that the jet is in the form of a film whose contours are projected onto a plane containing the Z axis has a continuous surface 15 coming from the slot of the spray orifice, this continuous surface 15 being bordered by filaments 16 which end in drops 17.
- the continuous surface 15 forms a liquid film 15.
- Figure 3b which is a view perpendicular to that of Figure 3a, it is observed that the continuous surface 15 is substantially flat over a distance D1 measured from the spray orifice 14, and then undulates over a distance D2, to be mainly in the state of drops 17 beyond the distance D2.
- the cloud of drops is thus formed at a cumulative distance of D1 and D2 from the spray orifice 14. There is thus a continuous liquid film over a cumulative distance of D1 and D2. Over the distance D1, a thickness “e” of the film is shown in Figure 3b. This thickness e decreases as the distance from the spray orifice 14 increases at which the thickness is measured. The further the measurement is taken from the spray orifice, the lower the film thickness. In fact, the continuous surface 15 becomes smaller until it forms the filaments 16 and the drops 17.
- the envelope surface of the spray sprayed by the spray orifice 14 encompasses the spatial environment in which the continuous surface 15, the filaments 16 and the drops 17 are at the outlet of the spray orifice.
- the shape of this envelope surface changes under the effect of the forces of gravity which apply to the drops.
- the spray orifice distributes the liquid in a spray having an opening angle a.
- the apex of the opening angle a is located upstream of the spray orifice 14.
- Figure 4a represents a modeling of a spraying device according to the invention.
- the spraying device also called a sprayer, comprises a nozzle 10 intended to be connected to a reservoir 7 by a connection 12.
- the nozzle is intended to distribute a liquid contained in the reservoir 7 through a spray orifice 14.
- the liquid is sprayed in the form of a film 11.
- the device comprises a collar 20 which surrounds the nozzle 10 and the spray orifice 14 such that an edge 21 of this collar 20 delimits an opening 4 of the spray device.
- the collar 20 comprises a base 24 crossed by the body of the nozzle 10, and a side wall 25 erected around the base 24.
- the side wall 25 comprises a bore 26 to receive the gas inlet 22.
- the collar has two bores such as 26 to receive two gas inlets such as 22.
- the two gas inlets 22 are diametrically opposed and are oriented so that their respective flows are oriented along the same distribution axis W
- the distribution axis W of the gas in the collar 20 intersects with the body of the nozzle 10, as shown in Figure 6.
- the two gas inlets 22 supply the flange 20 in gas upstream of the spray orifice 14, so that the distributed gas is located around the nozzle body and surrounds the spray sprayed by the spray orifice 14.
- a withdrawal distance dg of the gas inlets 22 relative to the opening 4 is greater than a distance between the spray orifice and the opening.
- the spray orifice is downstream of the gas inlets in the collar 20.
- the nozzle body is cylindrical, the bottom 24 and the side wall 25 are arranged to define an annular volume around the nozzle body.
- the side wall has an internal annular restriction 27 so that the interior volume delimited in the collar comprises the annular volume 28 around the nozzle body and a cylindrical volume 29, in fluid continuity with the volume annular 28.
- the spray orifice 14 is designed to open centrally, so that the spray orifice 14 is at all points equidistant from the internal annular restriction 27.
- the spray axis Y of the orifice spray 14 is substantially parallel to the main elongation axis of the flange 20.
- the spray orifice is at a distance “dr” from the opening 4. And as this is schematically represented, turbulence T is observed in the gaseous ozone due to a suction phenomenon d air A at the distribution opening 4.
- the withdrawal distance is of the order of a few centimeters, for example between 4 and 10 cm.
- This confinement chamber makes it possible to triple the proportion P3 of gas dissolved in the sprayed liquid compared to a reference value P1 which corresponds to the proportion of gas dissolved in the liquid before spraying.
- Another advantage of the device according to the invention is that it allows a strong enrichment of dissolved ozone, and a limitation of the phenomenon of desorption of the ozone dissolved in the sprayed liquid. Thanks to the invention, at a distance D of 1 meter from the opening, this proportion P3 in dissolved ozone is equal to that of the liquid in the tank. This result makes it possible to improve the efficiency of the phytosanitary treatments based on ozonated water thus distributed.
- a device according to the invention with a collar, demonstrates an efficiency 20 times greater than that of a simple device.
- this confinement chamber comprises the annular volume 28 and the frustoconical volume 29 minus the space taken up by the sprayed liquid.
- the confinement chamber extends between the spray orifice 14 and the opening 4.
- the configuration of the collar can be devoid of the frustoconical volume 28, due to the fact that the gas inlets 22 are arranged in the side wall 25 at a location located between the opening 4 and the spray orifice 14.
- the spray orifice distributes the liquid in a spray having an envelope surface.
- the collar defines a frustoconical volume 29 of circular section
- the envelope surface of the spray is also frustoconical of circular section
- the width of the spray and the width of the opening can be respectively measured according to any axis.
- the nozzle 10 comprises a spray orifice 14 in the form of a longitudinal slot along an axis Z, so that the spray is in the form of a jet of a film along the axis Y perpendicular to this axis Z, then the width of the spray of this envelope surface and the width of the opening are measured along this axis Z.
- the configuration of the nozzle 10 and the collar 20 is such that the width of the spray "Is ", measured at a distance "dr" from the spray orifice without a collar is between 80% and 140% of the width "lo" of the opening 4 along this Z axis.
- the width "If" of the surface continuous 15, Figure 3a, measured along the axis Z at a distance equal to the withdrawal distance dr of the spray orifice devoid of collar is between 40% and 120% of the width of the opening 4 the along this axis Z.
- the cumulative distance D1 and D2 can in particular represent between 40% and 120% of the withdrawal distance “dr”.
- the Z axis of the slot formed by the spray orifice is not necessarily parallel to the gas distribution axis W.
- a maximum thickness “Es” of the spray can be defined along an axis perpendicular to the Z axis.
- the opening 4 is preferably configured to have the shape of a slot, Figure 7, of width “lo” and thickness “Eo”, such as the maximum thickness “Es” of the spray, measured at a distance “dr” from the spray orifice without a collar is between 80% and 140% of the thickness “Eo” of the opening 4 perpendicular to this Z axis.
Landscapes
- Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Nozzles (AREA)
- Catching Or Destruction (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2209282A FR3139737B1 (fr) | 2022-09-15 | 2022-09-15 | Dispositif de pulvérisation d’eau ozonée en milieu agricole |
| PCT/FR2023/051412 WO2024056981A1 (fr) | 2022-09-15 | 2023-09-15 | Dispositif de pulvérisation d'eau ozonée en milieu agricole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4587194A1 true EP4587194A1 (fr) | 2025-07-23 |
Family
ID=85726477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23790713.4A Pending EP4587194A1 (fr) | 2022-09-15 | 2023-09-15 | Dispositif de pulvérisation d'eau ozonée en milieu agricole |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4587194A1 (fr) |
| FR (1) | FR3139737B1 (fr) |
| WO (1) | WO2024056981A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076497A (en) * | 1989-04-21 | 1991-12-31 | Rabitsch Benjamin F | Spray nozzle |
| JP2749495B2 (ja) | 1993-03-15 | 1998-05-13 | 長廣 仁蔵 | 高濃度オゾン水製造方法及び高濃度オゾン水製造装置 |
| US6076748A (en) | 1998-05-04 | 2000-06-20 | Resch; Darrel R. | Odor control atomizer utilizing ozone and water |
| JP2008229491A (ja) | 2007-03-20 | 2008-10-02 | Hamanetsu:Kk | オゾン水噴霧装置 |
| KR102252201B1 (ko) * | 2019-06-21 | 2021-05-14 | 주식회사 피스 | 농업용 액상물 분사기 |
| CN111643700A (zh) * | 2020-07-06 | 2020-09-11 | 闫大新 | 一种可移动式即制即用臭氧消毒喷雾器 |
-
2022
- 2022-09-15 FR FR2209282A patent/FR3139737B1/fr active Active
-
2023
- 2023-09-15 WO PCT/FR2023/051412 patent/WO2024056981A1/fr not_active Ceased
- 2023-09-15 EP EP23790713.4A patent/EP4587194A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024056981A1 (fr) | 2024-03-21 |
| FR3139737B1 (fr) | 2026-01-16 |
| FR3139737A1 (fr) | 2024-03-22 |
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