CN113424734B

CN113424734B - Hot-melt composite hydrophilic drainage cooling device and application thereof

Info

Publication number: CN113424734B
Application number: CN202110681137.8A
Authority: CN
Inventors: 邢志强
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2024-02-06
Anticipated expiration: 2041-06-18
Also published as: CN113424734A

Abstract

The invention relates to a hot-melt composite hydrophilic drainage cooling device and application thereof. The hot-melt composite hydrophilic drainage cooling device comprises a plurality of drainage wires and connecting wires connected with the drainage wires; the drainage wires are arranged in a crossing way with the connecting wires; the drainage wire comprises a hydrophilic surface layer and a base layer, and the hydrophilic surface layer and the base layer are formed by hot melt compounding; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilicity degree of the first hydrophilic outer surface reaches a first contact angle theta with water ₁ Less than 60 deg.. The hot-melt composite hydrophilic drainage cooling device has good cooling effect, can still keep good tensile strength and bending resistance under the environment of long-term sun-drying wind blowing water immersion, and has longer service life.

Description

Hot-melt composite hydrophilic drainage cooling device and application thereof

Technical Field

The invention relates to the technical field of greenhouse cooling, in particular to a hot-melt composite hydrophilic drainage cooling device and application thereof.

Background

In a high-temperature season, the temperature in the greenhouse is too high, so that the agricultural production is affected; at present, the common sunshade net and insect-proof net of the greenhouse are all made of hydrophobic polymer resin materials, water falling on the sunshade net and insect-proof net cannot spread and spread along the surface of the sunshade net and insect-proof net to form a water film, but the sunshade net and the insect-proof net roll down in a water drop shape, and the sunshade net and the insect-proof net are converged to flow to the ground to form waterlogging, corrode a shed frame and have small cooling amplitude. And the greenhouse environment is subjected to long-term sun-drying and wind blowing, so that the requirement on the strength of the material is high.

Disclosure of Invention

Based on the above, it is necessary to provide a hot-melt composite hydrophilic drainage cooling device which has good cooling effect, can still maintain good tensile strength and bending resistance under the environment of long-term sun-drying wind blowing water immersion, and has long service life.

In a first aspect of the present invention, there is provided a hot melt composite hydrophilic drainage cooling device comprising:

a plurality of drainage wires and connecting wires connected with the plurality of drainage wires; the drainage wire is arranged in a crossing way with the connecting wire; the drainage wire comprises a hydrophilic surface layer and a base layer, wherein the hydrophilic surface layer and the base layer are formed by hot melt compounding; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilicity degree of the first hydrophilic outer surface reaches a first contact angle theta with water ₁ ＜60°。

In one embodiment, the hot melt compounding comprises co-extrusion compounding and/or thermo-compression compounding.

In one embodiment, the hydrophilic surface layer comprises a material comprising a first polymeric resin; the material of the base layer comprises a second high polymer resin.

In one embodiment, the first polymeric resin comprises a first polymeric segment and the second polymeric resin comprises a second polymeric segment; the first polymer chain segment and the second polymer chain segment can form crystallization; and after the hydrophilic surface layer and the base layer are subjected to hot melting and compounding, crystals are formed at the interface by the first polymer chain segment and the second polymer chain segment.

In one embodiment, the first polymeric segment is selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, and a polyamide segment, as the second polymeric segment.

In one embodiment, the first polymer chain segment and the second polymer chain segment belong to a polyethylene chain segment, the first polymer resin is selected from hydrophilic modified polyethylene and/or hydrophilic modified ethylene-non-olefin unsaturated monomer copolymer, and the second polymer resin is selected from one or more combinations of polyethylene, ethylene-non-olefin unsaturated monomer copolymer, graft modified polyethylene and graft modified ethylene-non-olefin unsaturated monomer copolymer;

or the first polymer chain segment and the second polymer chain segment both belong to polypropylene chain segments, the first polymer resin is hydrophilic modified polypropylene, and the second polymer resin is selected from polypropylene and/or grafted modified polypropylene;

or the first polymer chain segment and the second polymer chain segment belong to polyester chain segments, the first polymer resin is hydrophilic modified polyester, and the second polymer resin is selected from polyester and/or graft modified polyester with the same dibasic acid and dihydric alcohol components which form polycondensation with the first polymer resin;

Or the first polymer chain segment and the second polymer chain segment both belong to polyamide chain segments, the first polymer resin is hydrophilic modified polyamide, and the second polymer resin is selected from polyamide and/or graft modified polyamide with the same dibasic acid and diamine components which form polycondensation with the first polymer resin.

In one embodiment, the hydrophilic surface layer and the base layer form chemical bond connection at an interface after being subjected to hot melt compounding.

In one embodiment, the chemical bond linkage is selected from one or more of an epoxy bond linkage to an anhydride, an epoxy bond linkage to an amino group, an isocyanate group linkage to an active hydrogen-containing molecule, a hydroxyl bond linkage to a carboxyl group, an amino bond linkage to a carboxyl group, a silicon hydroxyl bond linkage to a silicon hydroxyl group, an unsaturated group-to-unsaturated group bond linkage, an unsaturated group-to-molecule bond linkage, and an aldol condensation bond linkage.

In one embodiment, the surface of the base layer remote from the hydrophilic surface layer is provided with a base layer.

In one embodiment, the substrate layer comprises a third adjunct therein; the third auxiliary agent is selected from one or more of sterilizing algicides, repellents, magnetic powder, flame retardants, stabilizers, colorants, infrared light reflecting materials, photoluminescent materials and reversible thermochromic materials.

In one embodiment, the hydrophilic surface layer comprises a first adjuvant; the first auxiliary agent is one or a combination of more of sterilizing algicides, repellents, magnetic powder, flame retardants, stabilizers, colorants, infrared light reflecting materials, photoluminescent materials, reversible thermochromic materials and hydrophilic powder; and/or the number of the groups of groups,

the base layer comprises a second auxiliary agent; the second auxiliary agent is selected from one or more of bactericidal algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescent material and reversible thermochromic material.

In one embodiment, one end of the drainage wire is used for being in contact with a greenhouse, and the other end of the drainage wire is used for extending to a preset area on the ground at the side edge of the greenhouse.

In one embodiment, the connecting wire is fixedly connected with the crossing parts of the plurality of the drainage wires; or the hot-melt composite hydrophilic drainage cooling device comprises a plurality of drainage filaments which are woven; or, the hot-melt composite hydrophilic drainage cooling device forms the drainage wire and the connecting wire through shearing the hot-melt composite hydrophilic sheet.

In one embodiment, the connecting wire comprises a first connecting wire arranged at one end of the drainage wire and a second connecting wire arranged at the other end of the drainage wire; two adjacent drainage wires, the first connecting wires and the second connecting wires enclose a pore.

The invention provides an application of the hot-melt composite hydrophilic drainage cooling device in cooling of a greenhouse.

In a third aspect, the invention provides a greenhouse cooling system, which comprises a greenhouse body, a water supply device and the hot-melt composite hydrophilic drainage cooling device;

the hot-melt composite hydrophilic drainage cooling device is arranged on the greenhouse body, water flows out from the water supply device and flows through the hot-melt composite hydrophilic drainage cooling device.

According to the hot-melt composite hydrophilic drainage cooling device provided by the invention, the hydrophilic surface layer and the base layer are formed into drainage threads through hot-melt composite, and the hydrophilic surface layer is pulled by the base layer, so that the device has the following advantages:

(1) In the use process, the water can be spread into a thin water film, the evaporation temperature is reduced, and the cooling quantity in the water is also subjected to heat exchange with the environment in the greenhouse;

(2) When the heat exchanger is applied to the vicinity of a side air outlet of a greenhouse, the temperature of hot air entering the greenhouse can be reduced, so that the temperature and the humidity in the greenhouse are reduced;

(3) The water can be guided to a preset area at the side edge of the greenhouse, so that the water is prevented from flowing to the ground along the greenhouse covering, and the greenhouse frame is prevented from being waterlogged and corroded;

(4) Water circulation can be realized;

(5) The long-term repeated soaking still keeps good tensile strength and bending resistance, and the service life is long;

(6) After long-term repeated soaking, the overall shape and the size are not obviously changed, even if part of the exemplified hydrophilic surface layer slightly absorbs water and expands, under the traction action of the base layer, the hot-melt composite hydrophilic drainage cooling device still has no obvious extension along the laying direction, and is particularly suitable for long-term soaking in the windblown and sun-dried environment of a greenhouse;

(7) The bonding firmness of the hydrophilic surface layer and the base layer is high;

(8) The production process is simple, a large amount of solvent is not needed, the production is safe and environment-friendly, the occupied space is small, and the production speed is high;

(9) Low production cost, low use cost and low maintenance cost.

Drawings

FIG. 1 is a schematic cross-sectional view of a guide wire according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a guide wire according to another embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a guide wire according to yet another embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a guide wire according to yet another embodiment of the present invention;

FIG. 5 is a schematic view of a hot melt composite hydrophilic drainage cooling device according to an embodiment of the present invention mounted to a greenhouse;

FIG. 6 is a schematic view of a structure of two hot melt composite hydrophilic drainage cooling devices formed by shearing a hot melt composite hydrophilic sheet according to an example of the present invention;

FIG. 7 is a schematic structural diagram of a connection mode between a drainage wire and a connection wire of another exemplary hot-melt composite hydrophilic drainage cooling device;

FIG. 8 is a schematic diagram of a hot melt composite hydrophilic drainage cooling device and a squeeze film rope according to another embodiment of the present invention;

FIG. 9 is a schematic view of the hot melt composite hydrophilic drainage cooling device of FIG. 8 mounted on a cover;

FIG. 10 is a schematic view of a cover of an example of the present invention with a hot melt composite hydrophilic drainage cooling device disposed thereon;

100. greenhouse shed; 10. a shed frame; 20. a cover; 211. the upper edge of the side air outlet; 30. a hot-melt composite hydrophilic drainage cooling device; 31. a drainage wire; 311. a hydrophilic surface layer; 312. a base layer; 313. a base layer; 32. a connecting wire; 321. a first connecting wire; 322. a second connecting wire; 3221. a second connecting wire cutting port; 323. a third connecting wire; 34. a lower lacing wire; 40. a water collecting device; 50. film pressing ropes; 91. a water distribution device; 92. a water pump; 93. a water pipe; 95. a water storage device; 96. and a filtering device.

Detailed Description

The hot-melt composite hydrophilic drainage cooling device and application thereof of the invention are described in further detail below with reference to specific examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The meaning of the symbol "°" is: the degree is the unit of measure of the contact angle.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

The term "greenhouse film" and "greenhouse film" as used herein are colloquially referred to, and are not limited to being laid on a greenhouse, but also include being laid on a greenhouse or arch shed; the method is paved on a single greenhouse, and also paved on a multi-span greenhouse; the method is paved on the broken-line greenhouse and also paved on the arc-shaped greenhouse.

The term "greenhouse film" is only one representative of the attachment surface of the present invention, namely, the application to a plastic film greenhouse, and the present invention also includes application to a solar panel greenhouse or a glass greenhouse.

The term "plurality" as used herein is two or more than two; the term "multilayer" as used herein refers to two or more layers; the "plurality" as described herein is two or more.

As used herein, a "greenhouse" is a common term in the industry and may also be referred to as a greenhouse, shed, or arch.

Suitable objects for the greenhouse include microorganisms such as plants, animals or edible fungi.

The hot-melt composite hydrophilic sheet refers to a semi-finished sheet material with hydrophilic outer surface, which is formed by hot-melt compounding of raw materials in the process of producing the drainage wire, is subjected to simple physical deformation such as stretching and shearing, and can be obtained under the state that the layer relationship of each layer on the cross section is basically kept stable in the physical deformation process.

The invention provides a hot-melt composite hydrophilic drainage cooling device, which comprises a plurality of drainage wires and connecting wires connected with the plurality of drainage wires; the drainage wire is crossed with the connecting wireSetting; the drainage wire comprises a hydrophilic surface layer and a base layer, and the hydrophilic surface layer and the base layer are formed by hot melt compounding; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilicity degree of the first hydrophilic outer surface reaches a first contact angle theta with water ₁ ＜60°。

The hot-melt composite hydrophilic drainage cooling device is formed by intersecting drainage wires and connecting wires, wherein the drainage wires comprise a hydrophilic surface layer and a base layer which are in hot-melt composite; the hydrophilic surface layer provides good hydrophilicity, breaks the surface tension of water, enables the water to selectively flow to a preset area along the hot-melt composite hydrophilic drainage cooling device, hardly leaks to the ground along the covering and film pressing ropes of the greenhouse, prevents waterlogging and prevents corrosion of the shed frame; spreading water on the hydrophilic surface layer to form a thin water film, evaporating and cooling by heat exchange; the base layer has better water-proof soaking property, and has no obvious expansion deformation and no obvious reduction of tensile strength and bending resistance after long-term soaking in water; after the hydrophilic surface layer is in hot melting compounding with the base layer, the hydrophilic surface layer is combined with the base layer with good water soaking resistance, and is pulled by the base layer, so that even if the hydrophilic surface layer absorbs water and swells to a certain extent after long-term soaking, under the pulling action of the base layer, the hydrophilic surface layer tends to slightly swell and thicken along the thickness direction of the drainage wire, and is difficult to swell and elongate along the laying direction of the hot melting composite hydrophilic drainage cooling device, so that the drainage is prevented from being influenced by water side leakage due to relaxation or concave pocket generated by the swelling and elongation of the water absorption of the hot melting composite hydrophilic drainage cooling device; and the conditions that the tensile strength and the bending resistance of the drainage wire and the whole hot-melt composite hydrophilic drainage cooling device are obviously reduced due to the obvious reduction of the tensile strength and the bending resistance of the hydrophilic surface layer after the hydrophilic surface layer absorbs water and swells after the hydrophilic surface layer is soaked in water for a long time are prevented from being generated, so that the drainage wire and the whole hot-melt composite hydrophilic drainage cooling device are prevented from being broken and damaged under the use environment of a greenhouse immersed in the wind, the sun and the water.

In some examples, the first contact angle θ ₁ Less than 60 degrees. Specifically, a first contact angle θ ₁ Including but not limited to: 59 degrees, 55 degrees, 45 degrees, 39 degrees, 25 degrees, 11 degrees, 1 degree.

In some examples, as shown in fig. 1, the drainage wire 31 is a three-layer hot melt composite, and two sides of the base layer 312 are provided with a hydrophilic surface layer 311.

As shown in fig. 2, in some examples, the hydrophilic surface layer 311 is double-layer heat-melt-compounded with the base layer 312, i.e., the drainage wire 31 has the hydrophilic surface layer 311 on one side and the base layer 312 on the other side. The formed drainage wire is positioned at the first contact angle theta between one side of the hydrophilic surface layer 311 and water ₁ Less than 60 degrees. As such, water naturally tends to migrate along hydrophilic skin 311 and spread out upon contact with drainage wire 31.

In some of these examples, the base layer is a single layer. In other examples, the base layer is a multi-layer composite.

In some examples, the cross section of the drainage wire is circular, the hydrophilic surface layer and the base layer are arranged in concentric circles, the base layer is positioned on the inner side of the concentric circles, and the hydrophilic surface layer is positioned on the outer side to wrap the base layer.

In some of these examples, the hot melt compounding is co-extrusion compounding. In the coextrusion compounding process, the components of each layer are respectively extruded from a plurality of extruders with the same compounding die head in layers, and are compounded into a whole inside and outside the compounding die head, and the continuity of each layer is basically maintained.

In other examples, the hot melt compounding is by hot press compounding: the components of each layer are respectively made into sheets, and then the sheets are sequentially laminated and are combined into a whole through common heating extrusion.

It will be appreciated that when the drainage wire has a multi-layer structure, co-extrusion compounding and thermo-compression compounding may be used in combination. Specifically, after the first hydrophilic surface layer and the base layer form a double-layer co-extrusion composite sheet, the surface of the base layer far away from the first hydrophilic surface layer and the second hydrophilic surface layer are compounded through hot pressing. Thus, the drainage yarn with the hydrophilic surface layer formed by hot melting on both sides of the base layer can be formed.

In some examples, the material of the hydrophilic surface layer includes a first polymeric resin; the material of the base layer comprises a second high polymer resin.

In some examples, the first polymeric resin comprises a first polymeric segment and the second polymeric resin comprises a second polymeric segment; the first polymer chain segment and the second polymer chain segment can form crystallization; after the hydrophilic surface layer and the base layer are subjected to hot melting and compounding, crystals are formed at the interface by the first polymer chain segment and the second polymer chain segment.

It is understood that the crystallization of the present invention includes co-crystallization. When the first polymer resin and the second polymer resin are the same polymer resin, the first polymer resin and the second polymer resin form crystals through the first polymer chain segment and the second polymer chain segment; when the first polymer resin and the second polymer resin are different types of polymer resins, the first polymer resin and the second polymer resin form co-crystallization through the first polymer chain segment and the second polymer chain segment of the same type.

Therefore, no matter chemical reaction occurs or not, the hydrophilic surface layer and the base layer are firmly and tightly combined together through crystallization, and the pulling action of the base layer on the hydrophilic surface layer is obviously improved.

Further, the first polymeric segment is selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, or a polyamide segment, in the same category as the second polymeric segment.

In some examples, the first polymer chain segment and the second polymer chain segment belong to polyethylene chain segments, the first polymer resin is selected from hydrophilic modified polyethylene and/or hydrophilic modified ethylene-non-olefin unsaturated monomer copolymer, and as a specific example, the hydrophilic modification mode is graft modification, and the corresponding graft monomer is not limited to acrylic acid, sodium acrylate, allyl polyoxyethylene ether and the like, but is not limited thereto; the second high molecular resin is selected from one or more of polyethylene, ethylene-non-olefin unsaturated monomer copolymer, graft modified polyethylene and graft modified ethylene-non-olefin unsaturated monomer copolymer; in some examples, the polyethylene is selected from one or more combinations of HDPE, LDPE, LLDPE and metallocene polyethylene; the ethylene-non-olefin unsaturated monomer copolymer is selected from ethylene-vinyl acetate copolymer EVA and/or ethylene-vinyl alcohol copolymer.

As a specific example, the first polymer resin is a hydrophilically modified EVA, the second polymer resin is HDPE, and after hot melt compounding, the hydrophilic skin layer and the base layer form a co-crystal at the interface through a polyethylene segment.

In some examples, the first polymeric segment and the second polymeric segment are both polypropylene segments, the first polymeric resin is a hydrophilic modified polypropylene, and the second polymeric resin is selected from polypropylene and/or grafted modified polypropylene;

in some examples, the first polymeric segment and the second polymeric segment are both polyester segments, the first polymeric resin is a hydrophilically modified polyester, and the second polymeric resin is selected from polyesters and/or graft modified polyesters having the same diacid and diol components that form a polycondensation with the first polymeric resin. For example, when the first polymeric resin is a hydrophilic modified PET, the second polymeric resin is PET and/or graft modified PET.

In some examples, the first polymeric segment and the second polymeric segment are both polyamide segments, the first polymeric resin is a hydrophilic modified polyamide, and the second polymeric resin is selected from polyamides and/or graft modified polyamides having the same diacid and diamine components that form a polycondensation with the first polymeric resin. In some specific examples, when the first polymeric resin is hydrophilically modified polyhexamethylene adipamide, polyhexamethylene sebacamide, or polyhexamethylene dodecanoamide, the second polymeric resin is the corresponding polyhexamethylene adipamide, polyhexamethylene sebacamide, or polyhexamethylene dodecanoamide, or a graft modified, similar corresponding polyamide as described above.

In some examples, the hydrophilic skin layer and the base layer form a chemical bond connection at the interface after hot melt compounding. Thus, the hydrophilic surface layer and the base layer can be firmly connected together through chemical bonds whether the hydrophilic surface layer and the base layer contain polymer chain segments capable of crystallizing or whether the hydrophilic surface layer and the base layer interface are compatible.

In some examples, the chemical bond linkage is selected from one or more of an epoxy bond linkage to an anhydride, an epoxy bond linkage to an amino group, an isocyanate group linkage to an active hydrogen-containing molecule, a hydroxyl bond linkage to a carboxyl group, an amino bond linkage to a carboxyl group, a silicon hydroxyl bond linkage to a silicon hydroxyl group, an unsaturated group-to-unsaturated group bond linkage, an unsaturated group-to-molecule bond linkage, and an aldol condensation bond linkage. The active hydrogen-containing molecule comprises: hydroxyl-containing molecules, amino-containing molecules or phenolic hydroxyl-containing molecules.

In some examples, the chemical bond connection is a chemical bond connection of epoxy group and anhydride, and the first high polymer resin is selected from hydrophilic polyethylene prepared by co-grafting modification of glycidyl methacrylate and sodium acrylate; the second polymer resin is selected from maleic anhydride grafted polypropylene, the hydrophilic surface layer and the base layer are co-extruded and compounded, and the second polymer resin is kept at a constant temperature and stands, and chemical bond connection is formed at the interface of the hydrophilic surface layer and the base layer.

In some examples, the chemical bond connection is a chemical bond connection of an epoxy group and an amino group, and the hydrophilic surface layer is an aminosilane-hydrophilic modified PVC interpenetrating network structure sheet; the base layer is a sheet material of which the second high polymer resin is selected from glycidyl methacrylate grafted PE, the hydrophilic surface layer is compounded with the base layer by hot pressing, and the amino group of the hydrophilic surface layer and the epoxy group of the base layer form chemical bond connection at the interface.

In some examples, the surface of the base layer has a second contact angle θ with water ₂ > 70 degrees; preferably, the second contact angle theta of the surface of the base layer with water ₂ > 80 degrees; more preferably, the second contact angle theta of the surface of the base layer with water ₂ And the angle is more than or equal to 90 degrees.

In some examples, the second polymeric resin of the base layer is a thermoplastic resin (commercially available) that can be repeatedly thermoplastic molded for use as a primary material for thermoplastic appliances; the thermoplastic resin has better water resistance, basically unchanged shape, and basically no expansion and lengthening of the drainage wire along the extending direction after long-term soaking, and basically no obvious decline of the tensile strength and the bending resistance after long-term soaking in water near normal temperature; such thermoplastic resins include amorphous thermoplastic resins and crystalline thermoplastic resins, the specific kind of which is not limited, and are preferable One or more combinations of wire drawing stage, blow molding stage, film stage, extrusion stage, or injection molding stage are selected. Preferably, when the second polymeric resin of the base layer is such an amorphous thermoplastic resin, the second contact angle θ of the surface of the base layer with water ₂ More preferably, the second contact angle θ of the substrate surface with water is greater than 80 degrees ₂ Not less than 90 degrees; when the second polymer resin of the base layer is such crystalline thermoplastic resin, it is preferable that the second contact angle θ of the surface of the base layer with water is made due to the presence of the crystalline region ₂ > 70 degrees; more preferably, the second contact angle theta of the surface of the base layer with water ₂ > 80 degrees.

Further, as shown in fig. 3, in some of these examples, on the surface of the base layer 312 remote from the hydrophilic surface layer 311, a base layer 313 is provided.

In some of these examples, the base layer is a high strength, water resistant material, the base layer allowing the drain wire to further retain tensile strength after prolonged immersion in water. Specifically: the main components of the hydrophilic surface layer are hydrophilic modified polypropylene, the main components of the base layer are 40 parts by weight of polypropylene, 20 parts by weight of ethylene propylene diene copolymer and 40 parts by weight of LDPE, and the base layer is wiredrawing-grade HDPE.

In other examples, the base layer is a hot melt layer to facilitate the secure attachment of the drainage wire to a material such as a bonding wire.

In other examples, the base layer provides an auxiliary function for the drainage wire, specifically, for example, aluminum powder is added into the base layer, so that the drainage wire has a light reflecting function, and the temperature is further reduced.

As shown in fig. 4, in some examples, two sides of the substrate layer 313 are respectively provided with a substrate layer 312, and a hydrophilic surface layer 311 is respectively provided on a surface of each substrate layer away from the substrate layer, so as to form a five-layer hot-melt composite structure. In this way, the substrate layer may be composed of two materials that are incompatible on both side surfaces thereof.

In some examples, the base layer is hot melt compounded with the base layer as one piece.

In some examples, the material of the base layer includes a third polymeric resin containing a third polymeric segment, and the material of the base layer includes a second b polymeric segment, the second b polymeric segment and the third polymeric segment being capable of forming a crystal; and after the base layer and the basal layer are subjected to hot melting and compounding, forming crystals at the interface by the second b polymer chain segment and the third polymer chain segment.

In some examples, the second b polymeric segment is selected from a polyethylene segment, a polypropylene segment, a polyester segment, or a polyamide segment, in the same class as the third polymeric segment.

In some examples, the second b polymeric segment and the third polymeric segment are both polyethylene segments, the second b polymeric resin is selected from one or more combinations of polyethylene, an ethylene-non-olefin unsaturated monomer copolymer, a graft modified polyethylene, and a graft modified ethylene-non-olefin unsaturated monomer copolymer, and the third polymeric resin is selected from one or more combinations of polyethylene, an ethylene-non-olefin unsaturated monomer copolymer, a graft modified polyethylene, and a graft modified ethylene-non-olefin unsaturated monomer copolymer;

in some examples, the second b polymeric segment and the third polymeric segment are both polypropylene segments, the second b polymeric resin is selected from polypropylene and/or graft modified polypropylene, and the third polymeric resin is selected from polypropylene and/or graft modified polypropylene;

in some examples, the second b polymeric segment and the third polymeric segment are both polyester segments, the second b polymeric resin is selected from polyesters and/or graft-modified polyesters, and the third polymeric resin is selected from polyesters and/or graft-modified polyesters having the same diacid and diol components that form a polycondensation with the second b polymeric resin;

In some examples, the second b polymeric segment and the third polymeric segment are both polyamide segments, the second b polymeric resin is selected from polyamides and/or graft modified polyamides, and the third polymeric resin is selected from polyamides and/or graft modified polyamides having the same diacid and diamine components that form a polycondensation with the second b polymeric resin.

In some examples, the base layer and the base layer form a chemical bond connection at the interface after being hot melt compounded. As some specific examples, the chemical bond linkage is selected from one or more of an epoxy bond linkage to an anhydride, an epoxy bond linkage to an amino group, an isocyanate group linkage to an active hydrogen-containing molecule, a hydroxyl bond linkage to a carboxyl group, an amino bond linkage to a carboxyl group, a silicon hydroxyl bond linkage to a silicon hydroxyl group, an unsaturated group-to-unsaturated group bond linkage, an unsaturated group-to-molecule bond linkage, and an aldol condensation bond linkage. The active hydrogen-containing molecules include: hydroxyl-containing molecules, amino-containing molecules or phenolic hydroxyl-containing molecules.

In some examples, the hydrophilic surface layer contains hydrophilic groups in an amount such that the hydrophilic surface layer has a first contact angle θ with water ₁ Less than 60 degrees.

In some of these examples, the hydrophilic group is part of the first polymeric resin. In other examples, the molecule in which the hydrophilic group is located forms an interpenetrating network structure with the first polymeric resin. Thus, the hydrophilic group is firmly arranged in the hydrophilic surface layer, and even if the hydrophilic surface layer is repeatedly stretched, bent, folded, unfolded and immersed for a long time, the hot-melt composite hydrophilic drainage cooling device can keep hydrophilic.

In some examples, the hydrophilic group is selected from one or more of polyoxyethylene, hydroxyl, phenolic hydroxyl, silanol, carboxyl, carboxylate, amine, alkoxide, quaternary ammonium, zwitterionic, phosphate, sulfate, sulfonate, and sulfonate groups.

In the production process, the amount of hydrophilic groups is increased until the first contact angle theta between the first hydrophilic outer surface of the hydrophilic surface layer and water ₁ Less than 60 degrees.

Additionally, in some examples, the hydrophilic skin layer includes a first adjunct therein; the first auxiliary agent is selected from one or more of bactericidal algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescent material, reversible thermochromic material and hydrophilic powder. Further, the first auxiliary agent accounts for 0.1-25% of the hydrophilic surface layer by mass. The amount is selected to be within this range depending on the kind of auxiliary agent.

In some examples, the base layer includes a second adjunct therein; the second auxiliary agent is selected from one or more of bactericidal algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescent material and reversible thermochromic material. Further, the second auxiliary agent accounts for 0.1-25% of the mass of the base layer. The amount is selected to be within this range depending on the kind of auxiliary agent.

In some examples, the substrate layer includes a third adjunct therein; the third auxiliary agent is selected from one or more of bactericidal algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescent material and reversible thermochromic material. Further, the dosage of the third auxiliary agent is 0.1-25% of the mass percentage of the base layer. The amount is selected to be within this range depending on the kind of auxiliary agent.

Wherein, the sterilizing algicide prevents the drainage threads from breeding fungi and algae in water and illumination environment. In one example, the bactericidal algicide is selected from one or more of a heavy metal and its compound type bactericidal algicide, a boron-based bactericidal algicide and a sulfur-based bactericidal algicide. Specifically, the bactericidal algicide is selected from one or more of copper, silver, zinc, copper oxide, cuprous oxide, silver oxide, zinc oxide, basic copper carbonate, copper hydroxide, zinc borate and sulfur.

The repellent prevents or reduces the passage of animals, snakes, birds or arthropods into and out of the greenhouse through the hot melt composite hydrophilic drainage cooling device. In one example, the repellent is selected from one or more of a pungent agent, a bittering agent, an astringent agent, an odor agent, a purgative agent, a biocide, and an antifeedant.

The magnetic powder is attracted by the steel frame of the greenhouse, so that the hot-melt composite hydrophilic drainage cooling device is tightly attached to the steel frame.

The flame retardant is selected from one or more of halogen flame retardant, phosphorus flame retardant, nitrogen flame retardant, boron flame retardant, antimony flame retardant, inorganic metal compound flame retardant and expanded graphite flame retardant. Even in the environment without water supply, the flame retardant can prevent the burning of the hot-melt composite hydrophilic drainage cooling device.

The stabilizer is selected from one or more of light stabilizer, antioxidant and heat stabilizer.

The colorants may reduce light transmittance and/or alter the proportion of light entering the greenhouse in each band. In one example, the colorant is selected from the group consisting of one or more of carbon black, lithopone, iron red, iron yellow, iron black, iron blue, oil black, scarlet, sun yellow, phthalocyanine blue, ultramarine, chrome yellow, and chrome green.

The infrared light reflecting material reflects infrared light, and reduces the light transmittance of the hot-melt composite hydrophilic drainage cooling device. In one example, the infrared light reflecting material is selected from aluminum powder, rutile type titanium dioxide, ITO, naZnPO ₄ Or a combination of one or more of the hollow glass microspheres.

The photoluminescent material selectively absorbs light in certain bands, gains energy, and emits light in other bands. In one example, the photoluminescent material is selected from the group consisting of CaS: eu ²⁺ Europium benzoate, europium maleate complex-styrene copolymer and manganese doped zinc silicate.

The reversible thermochromic material changes color when the temperature exceeds the color change temperature, and recovers the color when the temperature is lower than the multiple color temperature, thereby reducing the light transmittance. In one example, the reversible thermochromic material is selected from one or more of a hexamethylene tetramine cobalt (ii) complex, a crystal violet lactone reversible thermochromic system, and a cresol red reversible thermochromic system.

In one example, the hydrophilic surface layer comprises a hydrophilic powder and a first polymeric resin, and the addition of the hydrophilic powder cooperates with the hydrophilicity of the first polymeric resin to collectively form a first contact angle θ of the hydrophilic surface layer with water ₁ Less than 60 degrees. Further, hydrophilic powder and waterThird contact angle theta ₃ ＜50°。

In some examples, the hydrophilic powder forms a chemical bond with at least one component (e.g., the first polymeric resin) contained in the hydrophilic surface layer. In this way, the hydrophilic powder is firmly attached in the hydrophilic surface layer.

In some examples, the hydrophilic powder is one or more of mica, diatomaceous earth, kaolin, hydrophilic white carbon, hydrophilic silica sol condensate, talc, montmorillonite powder, bentonite, wollastonite powder, zeolite powder, molecular sieve powder.

The invention also provides an application of the hot-melt composite hydrophilic drainage cooling device in cooling of a greenhouse.

In still another aspect, the invention provides a greenhouse cooling system, which comprises a greenhouse body, a water supply device and the hot-melt composite hydrophilic drainage cooling device; the hot-melt composite hydrophilic drainage cooling device is arranged on the greenhouse body, water flows out from the water supply device and flows through the hot-melt composite hydrophilic drainage cooling device.

Referring to fig. 5 to 8, fig. 5 shows a schematic view of an example of the hot-melt composite hydrophilic drainage cooling device 30 according to the present invention installed in a greenhouse 100, fig. 6 shows a schematic view of a structure of two hot-melt composite hydrophilic drainage cooling devices 30 formed by cutting a hot-melt composite hydrophilic sheet according to an example of the present invention, fig. 7 shows a schematic view of a connection mode between a drainage wire and a connection wire of another example of the hot-melt composite hydrophilic drainage cooling device 30 according to the present invention, and fig. 8 shows a schematic view of a structure of another example of the hot-melt composite hydrophilic drainage cooling device 30 according to the present invention and a film pressing rope 50. The hot-melt composite hydrophilic drainage cooling device 30 provided by an example of the invention comprises a plurality of drainage wires 31 and connecting wires 32 connected with the drainage wires 31. The drainage wire 31 and the connecting wire 32 are arranged in a crossing manner, the drainage wire 31 comprises a hydrophilic surface layer 311 and a base layer 312, the hydrophilic surface layer 311 and the base layer 312 are formed by hot melt compounding, the hydrophilic surface layer 311 is provided with a first hydrophilic outer surface, and the hydrophilization degree of the first hydrophilic outer surface reaches a first contact angle theta with water ₁ Less than 60 deg.. Drainage systemThe hydrophilicity of the filaments 31 breaks the surface tension of the water. In one example, one end of the drain wire 31 is in contact with the warmhouse booth 100. In one example, one end of the drainage wire 31 is in contact with the covering 20 of the greenhouse 100, and in particular, one end of the drainage wire 31 is disposed on the surface of the covering 20 of the greenhouse 100; preferably, one end of the drainage wire 31 is disposed on the outer surface of the covering 20 above the upper edge 211 of the side air outlet of the greenhouse 100. The other ends of the drainage wires 31 are used to extend to a predetermined area on the floor of the side of the frame 10 of the greenhouse 100. Specifically, the predetermined area is, for example, the water collecting device 40, a river channel, or the like, and the cover 20 is, for example, a greenhouse film, glass, or a sunlight panel, or the like, which is not limited herein.

The hot melt composite hydrophilic drainage cooling device 30 described above may be covered from any height above the cover 20. When the hot-melt composite hydrophilic drainage cooling device 30 is installed on the covering 20 of the greenhouse 100, one end of the drainage wire 31 is in contact with the surface of the covering 20, and the other end of the drainage wire 31 extends to the water collecting device 40 positioned on the ground beside the shed frame 10. In the process of dispersing water on the surface of the covering 20 or dispersing water on the hot-melt composite hydrophilic drainage cooling device 30 covered on the surface of the covering 20 for cooling, the water flows downwards along the covering 20, and the water on the surface of the covering 20 is drained through a plurality of drainage wires 31, or the water directly dispersed on the hot-melt composite hydrophilic drainage cooling device 30 is drained through a plurality of hydrophilic drainage wires 31. On the one hand, the plurality of drainage wires 31 can drain water into the water collecting device 40 at the side of the shed frame 10, so that the water is prevented from flowing to the ground along the covering 20 and/or the film pressing rope 50 to form waterlogging and corrosion of the shed frame 10; and can realize water circulation; on the other hand, the water can be spread into a thin water film by diffusion, so that the water is evaporated and cooled, and is indirectly subjected to heat exchange with hot air in the greenhouse through the cover 20, and is directly subjected to heat exchange with hot air entering the greenhouse near the air outlet 21 at the side of the greenhouse, so that the temperature of the air entering the greenhouse is obviously reduced, and the temperature in the greenhouse is obviously reduced; in addition, after entering the canopy after the cooling, the temperature rises in the canopy, the relative humidity naturally reduces, thereby avoiding the high humidity in the canopy.

The cross arrangement means that the drainage wires 31 and the connection wires 32 cross each other when the hot-melt composite hydrophilic drainage cooling device 30 is unfolded or mounted on the cover 20. The crossing angle of the guide wire 31 and the connecting wire 32 is not limited, and may be, for example, 90 °, or another angle.

Specifically, the drainage wire 31 is fixedly connected to the connection wire 32. Optionally, the drainage wire 31 and the connection wire 32 are fixedly connected at the crossing part in a bonding, hot-melt compounding, sewing, riveting or integrated forming manner.

It should be noted that, the connecting wire 32 is mainly used for connecting a plurality of drainage wires 31 together, that is, the connection position of the connecting wire 32 on the drainage wires 31 is not limited, and any position on the drainage wires 31 may be used for connection.

Referring to fig. 6, 7 and 8, as an example, the connecting wire 32 is connected to one end of the drainage wire 31, that is, the shape of the expanded hot-melt composite hydrophilic drainage cooling device 30 is comb-shaped. Wherein, one end of the drainage wire 31 refers to the end of the drainage wire 31 farthest from the ground after the hot-melt composite hydrophilic drainage cooling device 30 is installed on the cover 20, and the other end of the drainage wire 31 refers to the end closest to the ground.

Referring to fig. 7, it can be understood that, in the process of fixedly connecting the connection wire 32 with the drainage wire 31, in order to ensure that the connection wire 32 and the drainage wire 31 are firmly connected, as an example, the connection wire 32 is disposed at a certain portion of the drainage wire 31 in a crossing manner, and then the end portions of the drainage wire 31 are folded reversely, so that the drainage wire 31 is distributed on two sides of the connection wire 32, that is, at least two portions of the drainage wire 31 and the connection wire 32 are contacted with each other, and the at least two portions are bonded, heat-fused, combined, stitched or riveted together, so that the fixed connection between the drainage wire 31 and the connection wire 32 is firmer.

It should be noted that, the certain position may be any position on the drainage wire 31, for example, the middle position of the drainage wire 31, so that the two-folded drainage wire 31 is fixedly connected with the connecting wire 32, and a double-layered hot-melt composite hydrophilic drainage cooling device 30 is formed, which has a better drainage cooling effect; of course, other positions of the drainage wire 31 are also possible, and the arrangement is not limited herein and may be set according to actual needs.

Referring to fig. 6 and 7, as an example, when the thermal-insulation composite hydrophilic drainage cooling device 30 is installed, the connecting wires 32 are laid between the covering 20 and the film pressing rope 50, two adjacent drainage wires 31 are straddled on two sides of the film pressing rope 50 and extend to a preset area on the side surface of the greenhouse 100, and only one lower tie bar 34 is required to be installed on the other end of the drainage wires 31, so that the thermal-insulation composite hydrophilic drainage cooling device 30 can be installed between the greenhouse 100 and the preset area under the condition that the physical structure of the thermal-insulation composite hydrophilic drainage cooling device 30 is not required to be damaged by shearing. The connection mode between the other end of the drainage wire 31 and the lower lacing wire 34 comprises: binding; or a penetrating hole is arranged at the other end of the drainage wire 31, and the lower lacing wire 34 is penetrated through the penetrating hole; or the other end of the drainage wire 31 is wound around the lower lacing wire 34 to be reversely folded and adhered to the drainage wire 31 at a position beside the lower lacing wire 34.

In one example, the number of the connecting wires 32 is not limited to one, but may be two, three, four or more, and a hole gap (not shown in the figure) is enclosed between two adjacent drainage wires 31 and two adjacent connecting wires 32 crossing the drainage wires, the hole can pass through high-temperature air, and the water film formed on the first hydrophilic outer surface of the hydrophilic surface layer 311 of the drainage wire 31 can well reduce the temperature of the high-temperature air.

Referring to fig. 8 and 9, in one example, the connection wire 32 includes a first connection wire 321 disposed at one end of the drainage wire 31 and a second connection wire 322 disposed at the other end of the drainage wire 31. Two adjacent drainage wires 31, a first connecting wire 321 and a second connecting wire 322 enclose a hole. The lower tie bar 34 is inserted into the aperture.

Referring to fig. 8 and 9, further, the first connecting wire 321 is used for being laid between the covering 20 and the film pressing rope 50 of the greenhouse 100; the second connecting wires 322 are provided with a plurality of first cuts 3221, the first cuts 3221 are used for corresponding to the film pressing ropes 50 of the greenhouse 100 one by one, and the drainage wires 31 on two sides of the first cuts 3221 are used for being arranged on two sides of the film pressing ropes 50.

Referring to fig. 8 and 9, in specific use, according to the positions of the film pressing ropes 50, the second connecting wires 322 are sequentially cut at the corresponding positions aligned with the film pressing ropes 50 to form a plurality of first cuts 3221; and the first connecting wires 321 are paved between the covering 20 and the film pressing ropes 50, the drainage wires 31 are pulled out of the side edges of the shed frame 10, and the drainage wires 31 at the two sides of the first shear opening 3221 ride on the two sides of the corresponding film pressing ropes 50. And then the lower tie bars 34 are inserted at the lower edges of the holes formed by fixedly connecting the second connecting wires 322 and the drainage wires 31, so that the hot-melt composite hydrophilic drainage cooling device 30 can be stretched straight through the lower tie bars 34, and water flows along the drainage wires 31. Thus, the second connecting wire 322 arranged at the other end of the drainage wire 31 can avoid messy knotting of the drainage wires 31; and the lower lacing wire 34 does not need to be wound around each drainage wire 31, and only a few times of holes between two adjacent first shears 3221 are needed to be penetrated, so that the labor amount of paving and installing is obviously reduced, and the paving and installing efficiency is obviously improved. In addition, at the overlapping position of the hot-melt composite hydrophilic drainage cooling device 30 and the film pressing rope 50, each connecting wire 32 extending out of the film pressing rope 50 is sequentially cut off, so that the lower part of the hot-melt composite hydrophilic drainage cooling device 30 can be pulled out of the shed and extended onto the water collecting device 40. Because the connecting wire 32 is fixedly connected with the drainage wire 31, the first shearing opening 3221 is not disconnected, so that the influence on the longitudinal tensile strength of the hot-melt composite hydrophilic drainage cooling device 30 is basically avoided.

And, because connecting wire 32 and drainage wire 31 fixed connection, so can cut the required hot melt compound hydrophilic drainage heat sink 30 length wantonly according to warmhouse booth 100 length, be convenient for unify the standardized production of specification.

Referring to fig. 8, further, a third connecting wire 323 is further disposed between the first connecting wire 321 and the second connecting wire 322. As in the above embodiment, the first connecting wire 321 may be disposed between the membrane-pressing rope 50 and the cover 20, and the second connecting wire 322 and the third connecting wire 323 may be cut to extend out of the side of the canopy frame 10 and laid in a single layer; or the third connecting wire 323 is arranged between the film pressing rope 50 and the covering 20, the first connecting wire 321 and the second connecting wire 322 are cut off and hung outside the side edge of the shed frame 10, and the two layers are paved.

Referring to fig. 8, the specific structure of the drainage wire 31 is set according to actual requirements, which is not limited herein. As an example, the drainage wire 31 is one wire or two wires, etc., and for example, the drainage wire 31 is formed by connecting a plurality of drainage wire segments in series. In one example, different segments of drainage wire may be disposed above and below the third connecting wire 323, with interfaces between the segments of drainage wire located on the third connecting wire 323, which may overlap, level, interleave, or form a fracture; the water passes through the third connecting wire 323 from the small section of the drainage wire above the third connecting wire 323 and falls onto the small section of the drainage wire below the third connecting wire 323. In one example, the plurality of small segments of drainage wire may also be connected in parallel or in series.

As an example, multiple hot melt composite hydrophilic drainage cooling devices 30 may be applied in series, parallel or series-parallel to the same greenhouse 100. Namely: a plurality of hot-melt composite hydrophilic drainage cooling devices 30 can be spliced and used side by side on the same greenhouse 100; alternatively, as shown in fig. 10, a plurality of hot-melt composite hydrophilic drainage cooling devices 30 may be stacked on the covering 20, and two adjacent stacked hot-melt composite hydrophilic drainage cooling devices 30 are provided with a layer gap, and can be used for drainage of water with larger flow, layer-by-layer evaporation and heat exchange cooling, and stage-by-stage cooling of hot air entering the greenhouse between layers.

In one example, the connecting filaments 32 cross the drain filaments 31 in a different molecular orientation, such as perpendicular orientation, after stretching, thereby increasing the composite strength after the fixed connection.

In one example, the connecting wire 32 is a hydrophilic wire body, specifically, the connecting wire 32 is provided with a second hydrophilic outer surface, and the degree of hydrophilicity of the second hydrophilic outer surface reaches a fourth contact angle theta with water ₄ Less than 60 deg.. Therefore, the connecting wires can also spread water into a thin water film, and the water on one drainage wire flows to the adjacent drainage wires through the connecting wires, so that the water is distributed and balanced among the adjacent drainage wires. Of course, the connection wire 32 may be a hydrophobic wire body, which is not limited thereto, and may be selected according to actual circumstances.

In one example, the connection wire 32 includes a connection wire hydrophilic skin layer and a connection wire base layer, connectedThe yarn-connecting hydrophilic surface layer and the yarn-connecting base layer are formed by hot melt compounding; the second hydrophilic outer surface is specifically positioned on the hydrophilic surface layer of the connecting wire, and the hydrophilicity degree of the second hydrophilic outer surface reaches the fourth contact angle theta with water ₄ ＜60°。

In one example, the hydrophilic surface layer of the connecting wire contains a fourth polymeric resin, the base layer of the connecting wire contains a fifth polymeric resin, the fourth polymeric resin contains a fourth polymeric segment, and the fifth polymeric resin contains a fifth polymeric segment; the fourth polymer chain segment and the fifth polymer chain segment can form crystallization; and after the hydrophilic surface layer of the connecting wire and the connecting wire base layer are subjected to hot melting and compounding, forming crystals at the interface by the fourth polymer chain segment and the fifth polymer chain segment.

In one example, the fourth polymeric segment is selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, or a polyamide segment, in the same class as the fifth polymeric segment.

In one example, the hydrophilic surface layer of the connecting wire and the base layer of the connecting wire are combined by hot melting to form a chemical bond connection at the interface.

In one example, the surface of the connection wire base layer remote from the connection wire hydrophilic surface layer is provided with a connection wire base layer.

In another example, the hot-melt composite hydrophilic drainage cooling device 30 includes a plurality of drainage filaments 31 woven, and an aperture is defined between adjacent drainage filaments 31. Specifically, the knitting method is knitting, tatting, or the like; the braiding process is preferably self-locking braiding. Thus, the hot-melt composite hydrophilic drainage cooling device 30 is prevented from being wire-removed, or the hot-melt composite hydrophilic drainage cooling device 30 can only be wire-removed in a limited way.

Referring to fig. 6, in still another example, the hot-melt composite hydrophilic drainage cooling device 30 is formed by cutting a hot-melt composite hydrophilic sheet material to form the above-mentioned drainage wire 31 and the connecting wire 32, that is, the two drainage wires 31 and 32 are not required to be connected by hot-melt compounding, bonding, stitching or riveting, and also not required to be connected by braiding.

In one example, the connecting wire 32 and the drainage wire 31 are integrally formed from the same material.

The shearing method is not limited to punching, cutting, laser cutting, water jet cutting, or the like, and may be selected according to the actual situation, and is not limited to this. In addition, how the stretching process is specifically selected may be actually performed, and is not limited herein.

Referring to fig. 5 and 10, in one example, a greenhouse 100 includes a frame 10 and a cover 20, wherein the cover 20 is mounted on the frame 10. The greenhouse 100 further includes the hot-melt composite hydrophilic drainage cooling device 30 of any of the above examples, wherein one end of the drainage wire 31 is in contact with the covering 20, and the other end of the drainage wire 31 extends to a preset area located on the ground at the side of the greenhouse 100. Alternatively, the preset area is not limited, and is, for example, the water collecting device 40, a river channel, or the like.

The above-described greenhouse 100 may be covered with the hot melt composite hydrophilic drainage cooling device 30 from any height above the cover 20. When the hot-melt composite hydrophilic drainage cooling device 30 is installed on the covering 20 of the greenhouse 100, one end of the drainage wire 31 is in contact with the surface of the covering 20, and the other end of the drainage wire 31 extends to the water collecting device 40 positioned on the ground beside the shed frame 10. In the process of dispersing water on the surface of the covering 20 or dispersing water on the hot-melt composite hydrophilic drainage cooling device 30 covered on the surface of the covering 20 for cooling, the water flows downwards along the covering 20, the water on the surface of the covering 20 is drained through the plurality of drainage wires 31, or the water directly dispersed on the hot-melt composite hydrophilic drainage cooling device 30 is drained through the plurality of hydrophilic drainage wires 31. On the one hand, the plurality of drainage wires 31 can drain water into the water collecting device 40 at the side of the shed frame 10, so that the water is prevented from flowing to the ground along the covering 20 to form waterlogging and corrosion to the shed frame 10; and can realize water circulation; on the other hand, the water can be spread into a thin water film by diffusion, so that the water is evaporated and cooled, and is indirectly subjected to heat exchange with hot air in the greenhouse through the cover 20, and is directly subjected to heat exchange with hot air entering the greenhouse near the air outlet 21 at the side of the greenhouse, so that the temperature of the air entering the greenhouse is obviously reduced, and the temperature in the greenhouse is obviously reduced; in addition, after entering the canopy after the cooling, the temperature rises in the canopy, the relative humidity naturally reduces, thereby avoiding the high humidity in the canopy.

Referring to fig. 5, the water supply device includes a water distribution device 91, and the water distribution device 91 is used for distributing water to the covering 20 or directly to the hot melt composite hydrophilic drainage cooling device 30. The water distribution device 91 comprises a cavity wall, a water distribution device water inlet and a plurality of water outlet micropores, wherein the water distribution device water inlet and the water outlet micropores are formed in the cavity wall, the cavity wall encloses a cavity, the water distribution device water inlet is communicated with the cavity, and the cavity is communicated with the water outlet micropores. The water distribution means 91 may be spray, flow or drop. Optionally, the water distribution device 91 includes one or more combinations of micro-spray strips, spray pipes, drip pipes, capillary-drip-knives or capillary-sprayers.

In one example, the water supply device further comprises a water pump 92, and a water pipe 93 is arranged between the water pump 92 and the water distribution device 91. The water in the water storage device 95 flows out from the water pump 92 through the water pipe 93 and is dispersed on the covering 20 by the water distribution device 91, then falls on the hot-melt composite hydrophilic drainage cooling device 30, flows into the water collection device 40 along the hot-melt composite hydrophilic drainage cooling device 30, flows back to the water storage device 95 through the filtering device 96, and realizes water circulation.

The following are specific examples, and all materials used in the examples are commercially available products unless otherwise specified.

Example 1

The hot-melt composite hydrophilic drainage cooling device comprises a row of parallel equal-length aligned drainage wires, first connection wires which are sequentially and vertically crossed with the drainage wires at the upper ends of the drainage wires and fixedly connected with the drainage wires through adhesives, and second connection wires which are sequentially and vertically crossed with the drainage wires at the lower ends of the drainage wires and fixedly connected with the drainage wires through adhesives. The connecting wire is of a double-layer co-extrusion composite structure and is divided into a connecting wire X layer and a connecting wire Y layer, wherein the connecting wire X layer comprises 60 parts of HDPE, 0.1 part of light stabilizer UV-327 and 0.05 part of antioxidant 1076; the Y layer of the connecting wire comprises 40 parts of hot melt adhesive. Each drainage wire comprises a base layer, and two sides of the base layer are respectively provided with an a-th hydrophilic surface layer and a b-th hydrophilic surface layer which have the same components; the drainage wire is formed by compounding an a-th hydrophilic surface layer, a base layer and a b-th hydrophilic surface layer through three layers of coextrusion to form a' three layerA plywood' structure; the a-th hydrophilic surface layer comprises 19 parts of sodium acrylate grafted LDPE, 0.5 part of bactericidal algicide ultrafine copper powder and 0.1 part of repellent capsaicin; the base layer comprises 50 parts of HDPE, 5 parts of magnetic powder, 5 parts of decabromodiphenyl ethane, 1 part of carbon black, 0.5 part of rutile type titanium dioxide, 0.1 part of light stabilizer UV-327, 0.05 part of antioxidant 1076 and 0.5 part of slipping agent oleamide; forming crystals at the interface between the sodium acrylate grafted polyethylene of the a-th hydrophilic surface layer and the polyethylene of the base layer through respective polyethylene segments; likewise, on the other side of the base layer, sodium acrylate grafted polyethylene of the b-th hydrophilic skin layer forms crystals at the interface with polyethylene of the base layer; so that the base layer firmly pulls the a-th hydrophilic surface layer and the b-th hydrophilic surface layer; measuring a first contact angle theta ₁ 41 degrees.

The preparation method of the hot-melt composite hydrophilic drainage cooling device comprises the following steps:

(1) Sequentially and respectively co-extruding the raw materials of the a hydrophilic surface layer, the base layer and the b hydrophilic surface layer from three extruders with the same composite die head according to layers to prepare a hot-melt composite hydrophilic sheet;

(2) Cutting the hot-melt composite hydrophilic sheet into strips with the width of 0.5cm, and stretching to obtain a drainage wire;

(3) Respectively co-extruding the X layer component and the Y layer component of the connecting wire from two extruders with the same composite die head to prepare a second sheet;

(4) Cutting the second sheet into strips with the width of 1cm, and stretching to obtain connecting wires;

(5) Cutting a plurality of equal-length drainage wires, aligning and paving in parallel;

(6) 2 connecting wires are cut, and the two connecting wires are vertically clamped on two side surfaces of one end of each drainage wire; and the Y layer (hot melt adhesive layer) of the connecting wire faces the drainage wire, and the X layer of the connecting wire is far away from the drainage wire; thus, the two connecting wires and the drainage wire between the two connecting wires form a sandwich biscuit structure. The sandwich biscuit structure is compounded by hot pressing.

Thus obtaining the comb-tooth-shaped hot-melt composite hydrophilic drainage cooling device.

Example 2

(1) And (3) preparing a drainage wire: a drainage wire was prepared as in example 1;

(2) And (3) manufacturing a connecting wire: sequentially and respectively co-extruding three groups of raw materials, namely a connecting wire basal layer (the component of which is hot melt adhesive), a connecting wire basal layer (the component of which is HDPE) and a connecting wire hydrophilic surface layer (the component of which is the same as that of the a-th hydrophilic surface layer in the embodiment 1), from three extruders with the same compound die heads according to layers, cutting into strips of 2cm, and stretching to obtain a connecting wire with a hot melt adhesive layer on one side surface and the other side surface;

(3) Cutting a plurality of equal-length drainage wires, aligning and paving in parallel;

(4) According to the fixed connection method of embodiment 1, two first connecting wires are vertically clamped and fixedly connected to two side surfaces of one end of each drainage wire.

(5) And in the same way, the two second connecting wires are vertically clamped and fixedly connected to the two side surfaces of the other end of each drainage wire.

Thus obtaining the hot-melt composite hydrophilic drainage cooling device.

Example 3

The drainage yarn and the connecting yarn obtained in the embodiment 2 are woven into the hot-melt composite hydrophilic drainage cooling device through a loom, wherein the drainage yarn is used as weft yarn, and the connecting yarn is used as warp yarn.

Example 4

The hot-melt composite hydrophilic drainage cooling device prepared in the embodiment 3 is subjected to post-treatment by a hot-pressing process, so that the drainage wire is fixedly connected with the connecting wire.

Example 5

And shearing the hot-melt composite hydrophilic sheet prepared in the embodiment 1 to prepare the comb-tooth-shaped hot-melt composite hydrophilic drainage cooling device with two complementary shapes.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A hot melt composite hydrophilic drainage cooling device, comprising:

a plurality of drainage wires and connecting wires connected with the plurality of drainage wires; the drainage wire is arranged in a crossing way with the connecting wire; the drainage wire comprises a hydrophilic surface layer and a base layer, wherein the hydrophilic surface layer and the base layer are formed by hot melt compounding; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilicity degree of the first hydrophilic outer surface reaches a first contact angle theta with water ₁ ＜60°；

The connecting wire comprises a first connecting wire arranged at one end of the drainage wire and a second connecting wire arranged at the other end of the drainage wire; two adjacent drainage wires, the first connecting wires and the second connecting wires enclose a pore;

The hydrophilic surface layer comprises a first high polymer resin; the material of the base layer comprises a second high polymer resin;

the first polymer resin contains a first polymer chain segment, and the second polymer resin contains a second polymer chain segment; the first polymer chain segment and the second polymer chain segment can form crystallization; and after the hydrophilic surface layer and the base layer are subjected to hot melting and compounding, crystals are formed at the interface by the first polymer chain segment and the second polymer chain segment.

2. The hot-melt compounded hydrophilic drainage cooling device according to claim 1, wherein the hot-melt compounding mode comprises co-extrusion compounding and/or hot-press compounding;

a second contact angle theta of the surface of the base layer with water ₂ > 70 degrees.

3. The hot melt composite hydrophilic drainage cooling device of claim 1 wherein the first polymeric segment is selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, and a polyamide segment, in the same class as the second polymeric segment.

4. The hot melt composite hydrophilic drainage cooling device according to claim 3, wherein the first polymer chain segment and the second polymer chain segment are both polyethylene chain segments, the first polymer resin is selected from hydrophilic modified polyethylene and/or hydrophilic modified ethylene-non-olefin unsaturated monomer copolymer, and the second polymer resin is selected from one or more combinations of polyethylene, ethylene-non-olefin unsaturated monomer copolymer, graft modified polyethylene and graft modified ethylene-non-olefin unsaturated monomer copolymer;

5. The hot-melt composite hydrophilic drainage cooling device according to claim 1, wherein the hydrophilic surface layer and the base layer form chemical bond connection at an interface after hot-melt composite.

6. The hot melt composite hydrophilic drainage cooling device of claim 5 wherein the chemical bond linkage is selected from one or more of epoxy to anhydride, epoxy to amino, isocyanate to active hydrogen containing molecule, hydroxyl to carboxyl, amino to carboxyl, silanol to silanol, unsaturated group to unsaturated group, unsaturated group grafted to molecular chain, and aldol condensation.

7. The hot melt composite hydrophilic drainage cooling device of claim 1, wherein a substrate layer is provided on a surface of the substrate layer remote from the hydrophilic surface layer.

8. The hot melt composite hydrophilic drainage cooling device of claim 7 wherein the substrate layer comprises a third adjunct; the third auxiliary agent is one or more of sterilization algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescent material and reversible thermochromic material, and the dosage of the third auxiliary agent is 0.1-25% of the mass percentage of the base layer.

9. The hot melt composite hydrophilic drainage cooling device of claim 1, wherein the hydrophilic skin layer comprises a first auxiliary agent; the first auxiliary agent is one or a combination of more of sterilizing algicides, repellents, magnetic powder, flame retardants, stabilizers, colorants, infrared light reflecting materials, photoluminescent materials, reversible thermochromic materials and hydrophilic powder, and the dosage of the first auxiliary agent is 0.1-25% of the mass percentage of the hydrophilic surface layer; and/or the number of the groups of groups,

the base layer comprises a second auxiliary agent; the second auxiliary agent is one or more selected from bactericidal algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescent material and reversible thermochromic material, and the dosage of the second auxiliary agent is 0.1-25% of the mass percentage of the base layer.

10. The hot melt composite hydrophilic drainage cooling device according to claim 1, wherein the surface of the base layer has a second contact angle θ with water ₂ > 80 degrees.

11. The apparatus of claim 10, wherein the surface of the base layer has a second contact angle θ with water ₂ And the angle is more than or equal to 90 degrees.

12. The hot-melt composite hydrophilic drainage cooling device according to any one of claims 1 to 11, wherein one end of the drainage wire is used for being in contact with a greenhouse, and the other end of the drainage wire is used for extending to a preset area on the ground of the side edge of the greenhouse.

13. The hot-melt composite hydrophilic drainage cooling device according to any one of claims 1 to 11, wherein the connecting wires are fixedly connected with the crossing parts of a plurality of the drainage wires; or the hot-melt composite hydrophilic drainage cooling device comprises a plurality of drainage filaments which are woven; or, the hot-melt composite hydrophilic drainage cooling device forms the drainage wire and the connecting wire through shearing the hot-melt composite hydrophilic sheet.

14. The use of the hot-melt composite hydrophilic drainage cooling device according to any one of claims 1-13 in cooling a greenhouse.

15. A greenhouse cooling system, which is characterized by comprising a greenhouse body, a water supply device and the hot-melt composite hydrophilic drainage cooling device according to any one of claims 1-13;