• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Drip irrigation emitter (1), comprising a longitudinal body (2) with a filtration area (14) with a longitudinal inlet channel (3) and a plurality of inlet holes (4), and a second base (2.2) opposite and open, a cover (5) suitable to fit said second base (2.2) and, a membrane (6), where the cover (5) comprises a labyrinth (7), an outlet orifice (8) and a first reservoir (9), comprising means for adjusting the lid (5) on the body (2), and means for controlling the entry of roots that comprise a second reservoir (12) communicated with the first reservoir (9), in correspondence with an irrigation outlet; where the filtration area (14) of the body (2) comprises projections (15) that emerge perpendicularly, and means for extending the same to the entire length of the body (2). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2823600A1
    申请号:ES201930970
    申请日:2019-11-06
    公开日:2021-05-07
    发明作者:Cobacho Miguel Martinez；Janne Juhani Pihlainen；Nicolas Marta Garcia；Marín Jose Miguel López
    申请人:Sistema Azud SA；
    IPC主号:
    专利说明:

    [0002] Drip irrigation emitter
    [0004] Technical field of the invention
    [0006] The present invention corresponds to the technical field of irrigation devices, specifically to a drip irrigation emitter, which comprises a longitudinal body with a water filtration area and a plurality of inlet orifices, a self-compensating control membrane and, a cover capable of being adjusted to the body such that they configure an interior space between the two, and where the cover comprises a water outlet orifice, a first container for its containment and a labyrinth for the passage of filtered water.
    [0008] Background of the Invention
    [0010] At present there are different models of irrigation emitter that are used in drip irrigation pipes, so that each orifice of the same has an associated emitter, with which the water output is controlled and managed in a constant way. the same outlet pressure.
    [0012] These emitters have certain elements that help them to carry out their control function in an adequate way, such as a self-compensating membrane, a filtering area that prevents particles larger than a certain size from entering the emitter, and a labyrinth. passing the water.
    [0014] The filtering area on many occasions presents problems due to clogging of the inlet orifices to the emitter due to the fact that they represent an area that is too small in which it is not possible to generate enough fluid movement to prevent particles with a diameter similar to that of the spaces. of passage in said area are deposited and jammed in them and end up obstructing the inlet holes.
    [0016] Another problem that emitters in general tend to present is due to the fact that over time, the very nature of the plants that continually seek water, causes their roots to grow in the direction of the point from which it emerges, thus ending by getting into driving and entering it, they meet the issuer and they obstruct the water outlet hole, rendering it useless and the irrigation at that point as well.
    [0018] As an example of the state of the art, reference documents WO2009104183, US2016057947, WO2015044801, WO2014016832 and ES1065439 can be mentioned.
    [0020] Reference document WO2009104183 defines an emitter comprising a plurality of inlet openings through which the liquid enters the emitter, a multiple flow channel in which the liquid flows through the openings, an elastic diaphragm that sits in the flow channel of the collector and, an outlet opening through which the liquid entering the emitter leaves the emitter.
    [0022] In this emitter, the liquid entering the inlet openings displaces only a part of the diaphragm of the distributor channel, so that the liquid can leave the distributor channel and flow through the emitter to reach the outlet opening.
    [0024] This emitter further comprises a labyrinth that receives the liquid that has flowed in the collecting channel and a regulation reservoir that receives the liquid that flows through the labyrinth. Said regulation tank communicates through the outlet opening of the emitter, with an external liquid tank arranged opposite the regulation tank and which is located in correspondence of the collector irrigation hole.
    [0026] This drip irrigation emitter solution presents the same problems raised, since the roots with their tendency to seek the origin of the water, will grow in the direction of the collector irrigation hole and most of the time they enter through it and They also directly pass through the outlet opening of the emitter, leaving it completely obstructed and out of service.
    [0028] On the other hand, the filtering area of this emitter does not seem to take advantage of the entire possible surface of the emitter and they propose to solve the filtering area by means of a simple configuration. In practice, an arrangement such as the one proposed in the figures of this document does not manage to generate turbulence that allows the particles to be released that may become obstructed over time, which is why it eventually ends up obstructing the emitter, generating supply problems.
    [0029] Reference document US2016057947 defines a drip emitter for supplying irrigation water from a supply pipe to an emitter outlet at a reduced and relatively constant flow rate. Water enters the emitter from the supply tube, flows through a tortuous flow channel, and flows through an outlet of the emitter. The water then enters an outlet reservoir formed between the emitter and the supply tube and flows through a supply tube outlet. The outlet tank is defined by a boundary wall extending from the base of the emitter, and a partition separates the outlet tank into two secondary tanks. A copper member is mounted on the emitter within one of the secondary reservoirs in the exit reservoir to inhibit intrusion of the plant root at the exit of the emitter.
    [0031] The issuer thus defined, presents the exit deposit divided into two secondary deposits whose objective is simply to reduce the cost of the copper member, which would otherwise have to be located in the entire deposit. Thus, these two deposits do not have a technical function in the emitter, only to reduce the dimensions of the copper member. Said copper member is an element that they have to prevent the growth of roots of the plants near the exit, since contact with it generates damage to the surface of the root that causes the death of the root hairs and as Consequently, root growth is stunted.
    [0033] Although this fulfills the function of preventing the growth of the roots near the exit orifice, it is an environmental disadvantage, since chemical means are being applied to control the roots and the detrimental effect of the use of copper in agriculture is known.
    [0035] Furthermore, this emitter does not have an effective filtering area, since it involves two inlet orifices, which will present an easy and fast clogging, since it does not have a nearby area that allows generating a flow movement to avoid it.
    [0037] In reference document WO2015044801 a drip irrigation emitter including first and second members and a deformable membrane is determined. The membrane is located between the members and the pins found in the first member are received within the holes formed in the second member. The end parts of the pins that protrude from the holes are deformed and thus press the first and second members together and compress the membrane.
    [0038] This document presents a single tank in which the water outlet is located and that covers the entire length and width of the emitter. This way of realization of the tank has been shown to present problems due to the inclusion of roots that begin to grow towards this tank and are installed in it looking for the water outlet, through which they end up entering and closing.
    [0040] Likewise, although it does present a more extensive filtering area, it is made up of parallel longitudinal grooves, which in practice has been shown to be clogged by particles of a size similar to these grooves, preventing the passage of water into the emitter. Therefore, it is not enough to have inlet channels, as is the case in this document, but rather, as stated in this report, it is necessary to find a way to have a wide filtering area that has certain conditions that prevent it from clogging.
    [0042] Reference document WO2014016832 defines an integral and discrete drip irrigation emitter comprising means to facilitate the extension of the "legs" of the U-shaped configuration thereof, so that after fixing the drip emitter inside the surface of the pipe wall and from the moment the water pressure increases inside it, an elastic movement is made in a sector of the pipe wall that is framed and delineated as a consequence of the fixing of the circumferential edge of the outlet tank inside the pipe wall, when opening a slot formed in a sector of the pipeline as a water outlet opening and from the moment the water pressure decreases in the pipeline, the closure of the slot.
    [0044] In this case, the proposed emitter also does not present a way to avoid the growth of roots in the area of the emitter's exit, since it presents a deposit in which the emitter's exit is located, so that the roots will tend to fill this tank looking for the outlet hole that will end up clogging.
    [0046] Regarding the filtering of the water from the conduction into the emitter, in this case it has slots for filtering the particles suspended in the fluid. These grooves are longitudinal, parallel and of reduced length, and in practice their ineffectiveness has been demonstrated as they end up clogged by particles of a size similar to those of these grooves, which become embedded and finally collapse this filtering zone.
    [0047] With the aim of solving these drawbacks, the applicant himself developed a reference utility model ES1065439 in which a drip irrigation emitter is defined consisting of the combination of a base body and a cover suitably fixed together with interposition of a membrane. and designed to be fixed to the internal face of the wall of the water supply pipe.
    [0049] In turn, a water inlet is defined towards an inlet chamber in which said membrane participates, then a communication labyrinth between said inlet chamber and a self-compensating chamber, the latter provided with a communication hole with an outlet chamber, in which the wall of the pipe itself participates, in turn provided with a water outlet orifice.
    [0051] In this emitter, the outlet orifice of the self-compensating chamber is markedly out of phase with respect to the orifice of the pipe for the exit of the water to the outside, in order to make it difficult for the roots that enter the pipe to also enter the outlet orifice directly. dropper.
    [0053] Thus, in this emitter it was decided to decentrate the emitter outlet orifice with respect to the outlet orifice of the pipe itself, to avoid the obstruction of the communication orifice by the roots. However, in practice it has been shown that over time the roots that enter the emitter exit chamber begin to grow and occupy said chamber, thus eventually finding their way to the emitter orifice and obstructing it.
    [0055] Therefore, starting from the basis that the roots sooner or later end up entering the conduit, it is necessary to find a way to prevent them from finding the exit orifice of the emitter, thus preventing its obstruction.
    [0057] In the same way, a way must be found to reduce obstructions in the filtering area, without reducing the ability of the liquid to pass into the emitter and achieve a seal between the parts of the emitter, which allows a correct centering of the parts. and this is achieved quickly and easily.
    [0059] All this should be done with a clear objective of reducing the materials used, in order to contribute to the conservation of the environment.
    [0060] Description of the invention
    [0062] The drip irrigation emitter, for irrigation pipes that have a series of irrigation outlets that are presented here, comprises a longitudinal body with a first base that has a filtration area with a longitudinal flow inlet channel arranged inside of the same and a plurality of inlet holes, and a second opposite and open base, a cover suitable to fit said second base of the body such that they configure an interior space between them, and a control membrane.
    [0064] The cover has opposite inner and outer surfaces and a lateral contour between them, and comprises a labyrinth for the passage of filtered water, a water outlet orifice and a first containment tank on the outer surface.
    [0066] This irrigation emitter comprises means for adjusting the lid on the body comprising a rim arranged at least at opposite ends of the contour of the second base, and a curved portion emerging from at least part of the lateral contour of the lid suitable for its fit on the body flange.
    [0068] Likewise, this emitter comprises means for controlling the entry of roots formed by a second deposit arranged adjacent to and communicated with the first deposit. This second tank is also located in correspondence with an irrigation outlet of the pipeline, the surface of the second tank being larger than that of the first tank.
    [0070] On the other hand, the filtering area of the body comprises some projections arranged in a staggered fashion that emerge perpendicularly from the first base towards the outside and form spaces for the fluid to pass around the projections and, junction partitions between at least two projections, in those located coincident with the inlet channel, forming longitudinal projections perpendicular to said channel and, where the inlet holes are formed by the portions of the passage spaces between longitudinal projections coinciding with the inlet channel.
    [0072] In this emitter, the filtration area comprises means for extending the same such that it covers the entire length of the body at least in the main direction thereof.
    [0073] With the drip irrigation emitter proposed here, a significant improvement in the state of the art is obtained.
    [0075] This is so because an emitter is achieved in which the existence of the second deposit adjacent to the first and in correspondence with the exit orifice of the conduction achieves that the roots that finally penetrate the conduction, meet said second deposit, with a Larger surface than the first and with a curved contour so that the roots in their growth circle around the second deposit and do not approach the exit orifice of the emitter, thus avoiding any possible obstruction of the same due to the roots.
    [0077] Likewise, thanks to the shape of the projections of the filtering area, the inlet holes to the emitter have a curved section which, compared to the rectangular cross-section holes that exist in the emitters of the state of the art, present certain advantages.
    [0079] Thus, the passage width of said holes with a curved section is equal to the passage width of the rectangular holes, but the curved contour generates a reduction in the effective size of particles that can pass through the curved holes by about 20% less. regarding the size of the same in the rectangular holes. On the other hand, the curved orifices have 15% more surface than the rectangular ones, with which the fluid inlet capacity to the emitter is greater.
    [0081] In this way, a reduction in the maximum size of particles that can pass through the filtering area is being achieved, while increasing the inlet surface of the water, thereby achieving greater effectiveness of the emitter.
    [0083] On the other hand, an emitter of a reduced size is achieved compared to those existing in the state of the art, being able to represent more than half the length of most of said emitters.
    [0085] For proper operation with a smaller size, the labyrinth has been optimized for emitters of these dimensions, which have more teeth at the same distance, so that more turbulence is generated.
    [0087] The small size of the emitter, in addition to having a favorable effect on the environment, allows occupying a smaller interior volume of the irrigation pipeline, as well as optimize their transport and storage, reducing the energy consumption of said transport. All this improves the production process.
    [0089] However, this reduction in the dimensions of the emitter and the parts that compose it could pose a problem for the centering of the cover on the body of the emitter, when adjusting both, but this possible problem is solved thanks to the closure between the cover and the body with which it is achieved that the adjustment between the two is always centered simply with the pressure of the lid on the body, thus resulting in an easy, fast and correct assembly.
    [0091] Regarding the filtration area, a greater surface area of the same is obtained, collaborating in a larger area of the filter in which its configuration allows generating small turbulences on top of it, thus avoiding the accumulation of particles and achieving at the same time a minimum resistance to the flow of water for which a lower pressure drop is obtained.
    [0093] Thanks to the extensions of the filtration area formed by additional channels according to the direction of the flow, main currents are generated that drag the particles of the eddies deep down, generating a drag effect of the same that collide with other particles and mutually propel each other. .
    [0095] These additional channels also collaborate in reducing the pressure drop created by the dripper, thanks to their optimized fluid-dynamic design.
    [0097] On the inner surface of the first base of the body, the emitter has a series of ribs that direct the fluid that has entered the dripper towards the longitudinal flow inlet channel, to subsequently be directed towards the outlet of the emitter.
    [0099] This emitter has the labyrinth on the inside surface of the lid, which prevents it from heating up as it is not in contact with the conduit, which would generate variations in flow.
    [0101] Therefore, it is an emitter for drip irrigation that is very practical and easy to use, which achieves a correct filtering of the fluid, allowing it to pass through and being completely effective in avoiding its clogging, both in the inlet holes and in the orifice of exit.
    [0102] Brief description of the drawings
    [0104] In order to help a better understanding of the characteristics of the invention, according to a preferred example of a practical embodiment thereof, a series of drawings is provided as an integral part of said description, where, with an illustrative and non-limiting nature, it has been provided represented the following:
    [0106] Figure 1.- Shows an exploded perspective view of the drip irrigation emitter for a preferred embodiment of the invention.
    [0108] Figure 2.- Shows a bottom plan view of the body of the drip irrigation emitter for a preferred embodiment of the invention.
    [0110] Figure 3.- Shows a top plan view of the body of the drip irrigation emitter for a preferred embodiment of the invention.
    [0112] Figure 4.- Shows a view of detail A of the inlet holes of the drip irrigation emitter for a preferred embodiment of the invention.
    [0114] Figure 5.- Shows a bottom plan view of the drip irrigation cover for a preferred embodiment of the invention.
    [0116] Figure 6.- Shows a top plan view of the drip irrigation cover for a preferred embodiment of the invention.
    [0118] Figures 7.1 and 7.2.- They show respective cross sections of the emitter for a misadjusted and adjusted situation, respectively, of the cover on the body, for a preferred embodiment of the invention.
    [0120] Detailed description of a preferred embodiment of the invention
    [0122] In view of the figures provided, it can be seen how in a preferred embodiment of the invention, the drip irrigation emitter (1) proposed here, for irrigation pipes that have a series of irrigation outlets, comprises a longitudinal body (2) with a first base (2.1) that presents a filtration area (14) with a longitudinal flow inlet channel (3) arranged inside it and a plurality of inlet holes (4), and a second base (2.2) opposite and open.
    [0124] The emitter (1) comprises in turn, a cover (5) suitable to fit the second base (2.2) of the body (2) such that they configure an interior space between them and a control membrane (6) arranged in said space inside. This cover (5) has two opposite inner (5.1) and outer (5.2) surfaces and a lateral contour between them, and comprises a labyrinth (7) for the passage of the filtered water, an outlet hole (8) for the water and a first containment tank (9) on the outer surface (5.2).
    [0126] Likewise, the emitter (1) proposed here comprises means for adjusting the cover (5) on the body (2) that have a flange (10) arranged at least at opposite ends of the contour of the second base (2.2), and a curved portion (11) emerging from at least part of the lateral contour of the cover (5) suitable for fitting on the rim (10) of the body (2).
    [0128] As shown in Figures 7.1 and 7.2, the flange (10) is located at the longest ends of the body (2) and likewise, the curved portion (11) emerges with respect to the lateral contour of the cover (5) in the longest ends thereof, so that as shown in Figure 7.1, the distance between curved portions (11) of the cover (5) is greater than the distance between the flanges (10) of the body (2) , so that the cover (5) can have an initial position in which it is out of adjustment with respect to the body (2), as shown in Figure 7.1 and an adjusted position, which is shown in Figure 2, in which after exerting a pressure of the same on the body (2) the curved portions (11) are fitted in the edges (10) of the body and a closure of the emitter is achieved and at the same time a self-centering of both elements.
    [0130] This emitter (1) in turn comprises means for controlling the entry of roots. As can be seen in Figures 1 and 6, said control means comprise a second tank (12) communicated with the first tank (9), arranged adjacent to it and in correspondence with the irrigation outlet of the pipeline (not represented in the Figures), the surface of the second tank (12) being larger than that of the first tank (9).
    [0132] In this embodiment, the first tank (9) has a curved shape at least at the end of communication (13) with the second tank (12) and at the end opposite the same. Furthermore, in this case the second reservoir (12) has a flattened curved shape.
    [0134] In this way, the roots that penetrate through the outlet orifice of the conduction are directly with the second tank (12) that contains water and they will stay spinning in it due to the curved shape of the contour of this second tank (12).
    [0136] As shown in Figure 2, the filtration area (14) of the body of this emitter (1) comprises projections (15) arranged in a staggered fashion that emerge perpendicularly from the first base (2.1) outwards and form spaces of passage (16) of the fluid around the projections (15) and some junction partitions (17) between at least two projections (15), in those located coincident with the inlet channel, forming longitudinal projections (18) perpendicular to said channel (3), where the inlet holes (4) are formed by the portions of the passage spaces (16) between longitudinal projections (18) coinciding with the inlet channel (3).
    [0138] Said filtration area (14) comprises means for extending the same such that it covers the entire length of the body (2) at least in the main direction thereof.
    [0140] In this preferred embodiment of the invention, the means for extending the filtration area (14) comprise additional channels (20) parallel to the flow channel (3), from the passage spaces (16) close to the ends ( 21) of the first base (2.1) perpendicular to said flow channel (3) to said ends (21), as shown in said Figure 2.
    [0142] These additional channels (20) manage to generate main currents that favor the entrainment of the particles of the eddies that are generated in the filtration area (14).
    [0144] Likewise, in this embodiment, the junction partition (17) between at least two projections (15) has both sides concave towards the outside and a width smaller than said projections, such that the shape of the passage spaces (16 ) between longitudinal projections (18) is wavy and where the inlet holes (4) have a curved shape.
    [0146] In this way, the shape of the inlet holes (4) generated can be seen in Figure 4, and it has a larger passage surface than a hole that had a rectangular, being in turn smaller, the size of the particle capable of passing through said inlet holes (4).
    [0148] In this preferred embodiment of the invention, some projections (15) of the filtration area (14) have a circular section and others have a polygonal section, specifically hexagonal. In other embodiments, the section can be only circular or only polygonal.
    [0150] As can be seen in Figure 3, in this preferred embodiment of the invention, the interior of the body (2) comprises nerves (22) for directing the water introduced through the inlet channel (3) to an outlet channel ( 23) from the water with a first section (23.1) parallel to the inlet channel (3) and a second section (23.2) perpendicular to it.
    [0152] On the other hand, as shown in Figure 1, the control membrane (6) of the emitter (1) has geometry and dimensions essentially similar to those of its interior space.
    [0154] In this preferred embodiment of the invention, as can be seen in Figure 5, the labyrinth (7) for the passage of water is arranged on the inner surface (5.1) of the cover (5) and said cover (5) comprises a third reservoir (19) for containing the water flowing through the labyrinth (7) arranged on said inner surface (5.1), in correspondence with the first reservoir (9) arranged on the outer surface (5.2) and opposite to it.
    [0156] The described embodiment constitutes only an example of the present invention, therefore, the specific details, terms and phrases used in the present specification are not to be considered as limiting, but are to be understood only as a basis for the claims and as a representative basis that provides an understandable description as well as sufficient information to the person skilled in the art to apply the present invention.
    权利要求:
    Claims (1)
    [0001]
    1- Drip irrigation emitter (1), for irrigation pipes that have a series of irrigation outlets, comprising a longitudinal body (2) with a first base (2.1) that has a filtration area (14) with a longitudinal flow inlet channel (3) arranged inside it and a plurality of inlet holes (4), and a second base (2.2) opposite and open, a cover (5) suitable to fit said second base (2.2) of the body (2) such that they configure an interior space between the two and a control membrane (6), where the cover (5) has opposite interior and exterior surfaces (5.1, 5.2) and a lateral contour between both , and comprises a labyrinth (7) for the passage of filtered water, an outlet hole (8) for the water and a first containment tank (9) on the outer surface (5.2), characterized in that it comprises
    - means for adjusting the cover (5) on the body (2) comprising a flange (10) arranged at least at opposite ends of the contour of the second base (2.2), and a curved portion (11) emerging from the less part of the lateral contour of the cover (5) suitable for fitting on the rim (10) of the body (2), and;
    - means for controlling the entry of roots comprising a second deposit (12) connected to the first deposit (9), arranged adjacent to it and in correspondence with an irrigation outlet, the surface of the second deposit (12) being larger than that of the first deposit (9);
    - where the filtration area (14) of the body (2) comprises projections (15) arranged in a staggered pattern that emerge perpendicularly from the first base (2.1) outwards and form passage spaces (16) for the fluid around the projections (15) and, some junction partitions (17) between at least two projections (15), in those located coincident with the inlet channel (3), forming longitudinal projections (18) perpendicular to said channel (3) , where the inlet holes (4) are formed by the portions of the passage spaces (16) between longitudinal projections (18) coinciding with the inlet channel (3), and;
    - where the filtration area (14) comprises means for extending the same such that it covers the entire length of the body (2) at least in the main direction thereof.
    2- Drip irrigation emitter (1), according to claim 1, characterized in that the junction partition (17) between at least two projections (15) has both sides concave towards the outside and a width smaller than said projections, such that the shape of the passage spaces (16) between longitudinal projections is wavy and where the inlet holes (4) have a curved shape.
    3- Drip irrigation emitter (1), according to any of the previous claims, characterized in that the interior of the body (2) comprises nerves (22) for directing the water introduced by the inlet channel (3) to a channel outlet (23) of the water with a first section (23.1) parallel to the inlet channel (3) and a second section (23.2) perpendicular to it.
    4- Drip irrigation emitter (1), according to any of the previous claims, characterized in that the means of extension of the filtration area (14) comprise additional channels (20) parallel to the flow channel (3), from the passage spaces (16) close to the ends (21) of the first base (2.1) perpendicular to said flow channel (3) up to said ends (21).
    5- Drip irrigation emitter (1), according to any of the preceding claims, characterized in that the projections (15) of the filtration area (14) have a circular and / or polygonal section.
    6- Emitter (1) for drip irrigation, according to any of the preceding claims, characterized in that the control membrane has geometry and dimensions essentially similar to those of the interior space of the emitter.
    7- Drip irrigation emitter (1), according to any of the preceding claims, characterized in that the first tank (9) has a curved shape at least at the end of communication (13) with the second tank (12) and at the opposite end to it.
    8- Drip irrigation emitter (1), according to claim 7, characterized in that the second tank (12) has a flattened curved shape.
    9- Emitter (1) for drip irrigation, according to any of the preceding claims, characterized in that the labyrinth (7) for the passage of water is arranged on the inner surface (5.1) of the cover (5) and said cover (5 ) comprises a third reservoir (19) for containing the water that flows through the labyrinth (7) arranged on said inner surface (5.1), in correspondence with the first reservoir (9) arranged on the outer surface (5.2) and in the opposite way the same.
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    同族专利:
    公开号 | 公开日
    ES2823600B2|2021-10-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    ES1060237U|2005-05-10|2005-08-01|Wind, S.L.|Filter for drip irrigation emitter |
    ES1062385U|2006-03-03|2006-06-16|Wind, S.L.|Issuer of irrigation by dripping |
    WO2009104183A1|2008-02-21|2009-08-27|Netafim Ltd|Irrigation emitter|
    WO2011104722A2|2010-02-03|2011-09-01|Parixit Amrutbhai Patel|A non pressure compensated drip irrigation emitter with multiflow facility|
    法律状态:
    2021-05-07| BA2A| Patent application published|Ref document number: 2823600 Country of ref document: ES Kind code of ref document: A1 Effective date: 20210507 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930970A|ES2823600B2|2019-11-06|2019-11-06|Drip irrigation emitter|ES201930970A| ES2823600B2|2019-11-06|2019-11-06|Drip irrigation emitter|
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