Insect net for greenhouses

Abstract

The invention relates to an insect net (22) for a greenhouse (1) comprising a front panel (23) incorporated to two side panels, wherein the insect net (22) is pleated in a wave configuration to stack when folded, wherein the wave configuration is formed with wave portions (26), wherein each of the wave portions (26) has two parallel side wave portions (27) and a front wave portion (28), wherein each of the side wave portions (27) comprises a first side net (29) and a second side net (32) connected to each other at their longitudinal sides, each side net having a first short side configured to face the hinging axis and a second short side opposite to the first net end (33, 39) configured to face away from the hinging axis, wherein each of the front wave portions (26, 28) comprises a first front net (35) and a second front net (38) connected to each other at their longitudinal sides, and wherein the second short side of the first and second side nets (29) of the side wave portions (27) are connected to the longitudinal sides of the first and second front nets (35) facing the hinging axis of the ventilation panel, respectively.

Description

Background Technology

[0001] This invention relates to an insect net for a greenhouse. Furthermore, this invention relates to a netting system incorporating an insect net, and a greenhouse comprising an insect net or a netting system.

[0002] Such insect nets are known. Known insect nets have a corrugated shape and include a front plate incorporated into two side plates, wherein the side plates have a circular cross-sectional shape. When the glass plate is swung to its closed position, the insect net folds in a stacked manner. The corrugated portions of the side plates extend radially. Within the side plates, the corrugated portions extend symmetrically from the front plate toward the center, merging together at approximately half the height of the side plates at their ends. Summary of the Invention

[0003] In known insect webs, each of the two side plates and the front plate includes multiple corrugated portions. Each corrugated portion of the first side plate merges into a corrugated portion of the front plate at a first corner of the insect web, and subsequently, each corrugated portion of the front plate merges into a second side plate at a second corner of the insect web. Each corrugated portion includes two elongated meshes having a first longitudinal side and a second longitudinal side, the meshes being interconnected along the first longitudinal side to form the corresponding corrugated portion, the second longitudinal side being opposite to the first longitudinal side, and the meshes being interconnected along the second longitudinal side with the meshes of adjacent corrugated portions.

[0004] Each of the mesh panels of the two side panels has a first end facing the hinge axis of the glass plate and a second end opposite the hinge axis. At the second end, the mesh panels of the two side panels are connected to the mesh panel of the front panel. To connect each mesh panel of the side panel to a corresponding mesh panel of the front panel, the second end of each mesh panel overlaps with one end of the mesh panel of the front panel, such that the second end is located on the longitudinal side of the mesh panel of the front panel, which faces away from the hinge axis of the glass plate, also known as the outer longitudinal side of the front panel. The mesh panels of the side panels and the mesh panel of the front panel are stitched together along the sides of the overlapping area.

[0005] The inventors have discovered that a known drawback of insect nets is the uneven closure of the glass panels providing the net. Specifically, when viewed in a direction perpendicular to the front panel, the glass panel or its surrounding frame warps when closed, with the center of the glass panel or its surrounding frame resting on the window frame and the outer ends of the glass panel or its surrounding frame positioned above the window frame. This can cause the glass panel to break, requiring the greenhouse owner or the installer of the insect net to replace the broken glass panel.

[0006] Furthermore, the inventors have discovered that the glass panel or its surrounding frame warps when closed, resulting in unwanted ventilation at or near the outer end of the glass panel or its surrounding frame.

[0007] The purpose of this invention is to improve upon or eliminate one or more disadvantages of the prior art, and to provide an improved insect net or at least an alternative insect net.

[0008] According to a first aspect, the present invention provides an insect net for a greenhouse, wherein the insect net is configured to be fixed to a ventilation plate hinged about a hinge axis, wherein in the open position of the ventilation plate, the insect net extends at least between an opening edge extending parallel to the hinge axis of the ventilation plate and an edge of the ventilation plate extending parallel to the hinge axis of the ventilation plate.

[0009] The insect web includes a front plate merged into two side plates, wherein the insect web is pleated in a corrugated configuration to stack upon folding, wherein the corrugated configuration is formed having corrugated portions, wherein each of the corrugated portions has two parallel side corrugated portions and a front corrugated portion.

[0010] Each of the side corrugated portions includes a first side mesh and a second side mesh interconnected on its longitudinal side, and each side mesh has a first short side configured to face the hinge axis and a second short side configured to face away from the hinge axis and opposite to the first mesh end, wherein each of the front corrugated portions includes a first front mesh and a second front mesh interconnected on its longitudinal side, and

[0011] The second short sides of the first and second side meshes of the corrugated portion are respectively connected to the longitudinal side of the hinge axis facing the ventilation plate of the first and second front meshes.

[0012] Therefore, the insect net according to the invention has multiple corrugated portions. Each corrugated portion has two parallel side corrugated portions and one front corrugated portion. When the insect net is installed in a greenhouse, each of the side corrugated portions has a first side end configured to face the hinge axis of the ventilation panel and a second side end configured to face away from the ventilation panel. When the insect net is installed in a greenhouse, the second side end of the side corrugated portion is connected to the longitudinal side of the front corrugated portion facing the hinge axis, particularly the longitudinal side of its front mesh facing the hinge axis. The front mesh can be connected to each other, for example, by stitching, at its longitudinal side facing away from the ventilation panel. By connecting the second side end of the side mesh to the longitudinal side of the front mesh facing the hinge axis, the overlap between the side mesh and the front mesh is minimized. Therefore, multiple stitches are prevented from stacking together, as is the case in known insect nets. Therefore, compared to known insect nets, the thickness of the insect net at the junction from the side corrugated portions to the front corrugated portion is reduced. The inventors unexpectedly discovered that the reduction in thickness at the junction from the side corrugated portion to the front corrugated portion advantageously results in a reduction or, ideally, elimination of warping of the ventilation panel when it is in the closed position.

[0013] Furthermore, the reduced thickness of the insect web at the junction from the side corrugations to the front corrugations may cause the frame surrounding the glass panel to rest on the window profile across its entire width when viewed in a direction perpendicular to the front panel. Advantageously, this can reduce or ideally eliminate ventilation occurring at or near the outer ends of the glass panel or the surrounding frame.

[0014] Furthermore, compared to insect nets according to the prior art, the reduced thickness of the insect net at the point where the side corrugations merge to the front corrugations can lead to a reduction in light loss.

[0015] In the context of this patent application, a ventilation panel must be understood to be selected from, but not limited to, tempered glass panels, glass panels, ETF foil, honeycomb panels, polycarbonate panels, sandwich panels, or combinations thereof.

[0016] In one embodiment, each of the first front mesh and the second front mesh has a first mesh end and a second mesh end opposite to the first mesh end in its longitudinal direction, wherein the second short sides of the first side mesh and the second side mesh of the side corrugated portion are respectively connected to the longitudinal side of the hinge axis of the first front mesh and the second front mesh facing the ventilation plate at or near the first mesh end or the second mesh end of the first front mesh and the second front mesh.

[0017] In one embodiment, the first and second front meshes are connected to each other at their first and second ends. By closing the first and second ends of the front corrugated portions, the insect net is completely closed, thereby preventing insects from entering or leaving the greenhouse through ventilation openings associated with the ventilation panel.

[0018] In one embodiment, the second short sides of the first and second side meshes of the side corrugated portions are respectively fused to the longitudinal sides of the hinge axes facing the ventilation plate of the first and second front meshes. In an alternative embodiment, the second short sides of the first and second side meshes of the side corrugated portions are respectively welded to the longitudinal sides of the hinge axes facing the ventilation plate of the first and second front meshes. By welding or fusing the side meshes to the front mesh, the side meshes and the front mesh are at least partially fused together. This is advantageous because the thickness of the corrugated portion remains minimal at the point where the side meshes and the front meshes meet.

[0019] In one embodiment, the second short sides of the first and second side meshes of the side corrugated portion are respectively sewn to the longitudinal side of the hinge axis facing the ventilation plate of the first and second front meshes.

[0020] In one embodiment, the longitudinal sides of the first front mesh and the second front mesh, which are opposite to the hinge axis, are spaced apart from the first mesh end and the second mesh end of the first side mesh and the second side mesh, respectively.

[0021] In one embodiment, the longitudinal sides of the first front mesh and the second front mesh that are opposite to the hinge axis are not connected to the first side mesh and the second side mesh (free from).

[0022] In one embodiment, the first side mesh has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side, and the second side mesh also has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side; the first side mesh and the second side mesh are interconnected through the second longitudinal side; the first front mesh has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side, and the second front mesh also has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side; the first front mesh and the second front mesh are interconnected through the second longitudinal side; the first side mesh and the second side mesh are connected to the first longitudinal side of the first front mesh and the second front mesh.

[0023] In one embodiment, the mesh is composed of a woven fabric comprising warp threads and intersecting weft threads that alternately travel above and below continuous warp threads, wherein each warp and weft thread comprises at least one strand.

[0024] In one embodiment, the strand is formed of plastic resin or glass fiber.

[0025] In one embodiment, the plastic resin is a polyolefin.

[0026] In one embodiment, the plastic resin is polyethylene, polypropylene, or polyester.

[0027] In one embodiment, when the ventilation panel is in the open position, at least one of the side panels has a triangular shape. In one embodiment, the mating ends of a pair of corrugated portions opposite to the front panel are farther from the front panel than the mating ends of another pair of corrugated portions opposite to the front panel, wherein the other pair of corrugated portions is located between the first pair of corrugated portions.

[0028] In one embodiment, the side panels include an outermost corrugated portion and a plurality of intermediate corrugated portions interconnected along the longitudinal inner edges of their webs, wherein the corrugated portions all merge their front sides into the front panel, wherein the webs of each intermediate corrugated portion are interconnected at opposite rear ends, wherein the opposite rear ends of the outermost corrugated portion are configured to be located at or near the hinge axis, and wherein the rear ends of the continuous intermediate corrugated portions are adjacent to and extend along the outermost corrugated portion.

[0029] According to a second aspect, the present invention provides a netting system for a greenhouse, wherein the netting system includes a frame for securing the netting system to a ventilation panel, the frame being hinged about a hinge axis, and an insect netting according to a first aspect of the invention.

[0030] The net system according to the invention has at least the same technical advantages as that described with respect to the insect net according to the first aspect of the invention.

[0031] In one embodiment, the insect net is secured to a frame by stitching, particularly to a stitched net extending downwards from the frame. The stitched net can be made of, for example, rubber, EPDM, etc.

[0032] In the context of this application, it must be understood that insect nets and net systems are also applicable to sales areas, stables, garden centers, etc.

[0033] According to a third aspect, the present invention provides a greenhouse comprising a roof structure having an inclined upper surface with an opening and a rectangular glass panel covering the opening, wherein the glass panel is hingedly connected at its upper edge to a portion of the roof structure to be hinged about a hinge axis between a closed position in which the glass panel is substantially parallel to the upper surface and an open position in which the glass panel is inclined relative to the upper surface to form a ventilation channel.

[0034] The greenhouse may also include an insect net according to the first aspect of the invention, or a net system according to the second aspect of the invention.

[0035] The greenhouse according to the invention has at least the same technical advantages as the insect net described with respect to the first aspect of the invention.

[0036] According to a fourth aspect, the present invention provides a method for manufacturing a corrugated portion of an insect net according to a first aspect of the present invention, the method comprising the following steps:

[0037] - Provide two or more side meshes and two or more front meshes;

[0038] - Connect the two side meshes together along their longitudinal sides;

[0039] - Connect the two front mesh panels together along their longitudinal sides; and

[0040] - The two connected side meshes are fixed to the two connected front meshes by arranging the second short side of the side meshes on the longitudinal side of the hinge axis of the front meshes, which is configured to face the ventilation panel in use, and connecting them to the longitudinal side of the front meshes.

[0041] The method according to the invention has at least the same technical advantages as that described with respect to the insect net according to the first aspect of the invention.

[0042] In one embodiment, the side mesh is attached to the front mesh by welding, fusion, or stitching.

[0043] The various aspects and features described and illustrated in the specification can be applied individually in any possible circumstances. These individual aspects, in particular the aspects and features described in the appended claims, can be the subject of a divisional patent application. Attached Figure Description

[0044] The present invention will be illustrated based on exemplary embodiments shown in the accompanying drawings, wherein:

[0045] Figure 1 It is an isometric view of a greenhouse with a roof structure having glass panels, the glass panels having a net system, and the net system having insect nets;

[0046] Figure 2 yes Figure 1 An isometric view of a glass panel in a glass panel with a mesh system, having a front panel;

[0047] Figure 3 yes Figure 2 A more detailed view of the insect web system;

[0048] Figure 4 It shows Figure 3 Details of insect nets based on existing technology;

[0049] Figure 5 It shows Figure 3 Details of the insect net according to an embodiment of the present invention;

[0050] Figure 6 It shows Figure 2 A front view of a glass plate having a mesh system according to an embodiment of the present invention in a direction perpendicular to the front plate; and

[0051] Figure 7 It shows Figure 2 A front view of a glass panel with a mesh system according to the prior art in a direction perpendicular to the front panel. Detailed Implementation

[0052] Figure 1 and Figure 2 A Venlo-type greenhouse 1 is shown. Greenhouse 1 includes multiple rows of vertical columns 2 supporting a roof structure 3. The roof structure 3 includes a frame with multiple parallel ridge profiles 4 and lower gutter profiles 5. Adjacent ridge profiles 4 and gutter profiles 5 are interconnected by inclined window profiles 6. The ridge profiles 4, gutter profiles 5, and window profiles 6 are made of metal, particularly aluminum, and form rectangular slots for fixing glass panels 7.

[0053] The roof structure 3 also includes multiple regularly distributed glass panels 8, such as tempered glass panels 8, also known as ventilation panels. Each of the glass panels 8 is hingedly connected to the adjacent ridge profile 4 on its upper side. The glass panels 8 are transparent to allow light to enter the greenhouse 1. Figure 2 As shown, the glass panel 8 is shorter than the fixed glass panel 7. A horizontal window profile 9 is provided between two adjacent sloping window profiles 6 to form a groove below the glass panel 8 for attaching a smaller glass panel 10.

[0054] like Figure 2 As shown, the glass panel 8 is configured to hinge around hinge axis B between the open and closed positions to regulate ventilation of the greenhouse 1. The greenhouse 1 is equipped with a push rod 11 connected to a distributed connector 12 within the tempered glass panel 8. The push rod 11 is coupled to a slider 13, which can be moved along a horizontal track 14 by a motor to move the tempered glass panel 8 to its open or closed position.

[0055] Each of the glass panels 8 is equipped with a netting system 20 to prevent insects from passing through when the glass panel 8 is in the open position. These can be harmful insects that must be kept outside the greenhouse 1, or specific insects that must be kept inside the greenhouse 1. The netting system 20 includes a frame 21 arranged along the free edge of the glass panel 8, and an insect net 22 made of fine mesh. When the glass panel 8 is in the closed position, the frame 21 rests on the horizontal window profile 9 and the adjacent sloping window profile 6. The insect net is pleated into a corrugated configuration so that it stacks when folded. The insect net 22 is connected to the frame 21 on its upper side, for example by sewing the insect net 22 to a stitched net (not shown) oriented downwards from the frame 21. The stitched net can be made of rubber, EPDM, etc., and on the lower side, the insect net 22 is attached to the corresponding horizontal window profile 9 and sloping window profile 6 along the ventilation openings.

[0056] Figure 3 An insect net 22 without a frame 21 is shown. The insect net 22 includes a front plate 23 and two parallel side plates 24. The two parallel side plates 24 merge into the front plate 23 at a straight corner 25. When the insect net 22 is arranged on a glass plate 8, the two parallel side plates 24 extend substantially laterally or laterally to the hinge axis B of the respective glass plate 8.

[0057] like Figure 3As shown, the two parallel side panels 24 and the front panel 23 include multiple corrugated portions 26 stacked on top of each other to form a pleated configuration of an insect web. Each corrugated portion 26 has two parallel side corrugated portions 27 and a front corrugated portion 28. Each of the two parallel side corrugated portions 27 has a first side mesh 29 and a second side mesh 32. The first side mesh 29 has a first longitudinal side 30 and a second longitudinal side 31 opposite to the first longitudinal side, and the second side mesh 32 also has a first longitudinal side 30 and a second longitudinal side 31 opposite to the first longitudinal side 30. The first side mesh 29 and the second side mesh 32 are connected to each other, for example, by stitching along their second longitudinal sides 31. Furthermore, each of the first side mesh 29 and the second side mesh 32 includes a first mesh end 33 facing the hinge axis B of the glass plate 8, also referred to as the first short side, and a second mesh end 34 facing away from the hinge axis B of the glass plate 8 and facing the front panel 23, also referred to as the second short side.

[0058] Each of the front corrugated portions 28 has a first front mesh 35 and a second front mesh 38. The first front mesh 35 has a first longitudinal side 36 and a second longitudinal side 37 opposite to the first longitudinal side, and the second front mesh 38 also has a first longitudinal side 36 and a second longitudinal side 37 opposite to the first longitudinal side 36. The first front mesh 35 and the second front mesh 38 are connected to each other, for example, by stitching along their second longitudinal sides 37. Furthermore, each of the first front mesh 35 and the second front mesh 38 includes a first mesh end 39 facing one of the two parallel side plates 24 and a second mesh end 40 facing the other of the two parallel side plates 24.

[0059] The front corrugated portion 26 and the two side corrugated portions 27 are interconnected by connecting the first side mesh 29 of the side corrugated portion 27 to the first front mesh 35 of the front corrugated portion 26 and by connecting the second side mesh 32 of the side corrugated portion 27 to the second front mesh 38 of the front corrugated portion 26, as per [reference to...]. Figure 4 and Figure 5 A more detailed explanation.

[0060] exist Figure 4 The diagram illustrates how, according to the prior art, the side meshes 29 and 32 of the side corrugated portion 27 are connected to the front meshes 35 and 38 of the front corrugated portion 26. For example... Figure 4As shown, the second mesh ends 34 or second short sides of the side meshes 29 and 32 of the side corrugated portions 27 are placed on the second mesh ends 40 of the front meshes 35 and 38, or the second mesh ends 40 of the front meshes 35 and 38 are placed on the second mesh ends 34 of the side corrugated portions 27, thereby achieving the overlapping area 45. As clearly shown, the second mesh ends 34 or second short sides of the side meshes 29 and 32 are located on or at the second longitudinal side 37 of the front meshes 35 and 38, that is, the longitudinal side of the front mesh facing away from the hinge axis B of the glass plate 8. This also applies to the first mesh ends 39 of the front meshes 35 and 38. Subsequently, the side meshes 29 and 32 are sewn to the front meshes 35 and 38 along the outer edge of the overlapping area 45 by stitching lines 46.

[0061] exist Figure 5 The diagram illustrates, according to an embodiment of the invention, how the side meshes 29, 32 of the side corrugated portion 27 are connected to the front meshes 35, 38 of the front corrugated portion 26. For example... Figure 5 As clearly shown, the second mesh ends 34 or second short sides of the side meshes 29 and 32 of the side corrugated portions 27 are connected to the first longitudinal side 36 of the front meshes 35 and 38, i.e., the longitudinal side of the front meshes 35 and 38 facing the hinge axis B of the glass plate 8, at or near the second mesh end 40 of the front meshes 35 and 38. Specifically, the second mesh ends 34 of the side meshes 29 and 32 of the side corrugated portions 27 are spaced apart from the second longitudinal side 37 of the front meshes 35 and 38, i.e., the longitudinal side of the front meshes 35 and 38 facing away from the hinge axis B of the glass plate 8. The side meshes 29 and 32 are interconnected with the front meshes 35 and 38 by welding, forming a welding area 47 thereon. Figure 5 As clearly shown, the first mesh end 39 and the second mesh end 40 of the front mesh 35, 38 are connected to each other, for example by welding, to form a front corrugated portion 28 with closed ends.

[0062] Because the side meshes 29 and 32 and the front meshes 35 and 38 are connected to each other by welding, such as Figure 4 As shown, compared to the thickness of the corrugated portion 26 at the junction of the side corrugated portion 27 and the front corrugated portion 28 in the insect net 22 according to the prior art, the thickness of the corrugated portion 26 at the junction of the side corrugated portion 27 and the front corrugated portion 28 is reduced. This is advantageous because it allows the glass panel 8 to close uniformly, so that the frame 21 is uniformly positioned on the horizontal window profile 9.

[0063] Additionally, compared to the prior art, ventilation at the point where the side meshes 29, 32 of the side corrugated portion 27 merge into the front meshes 35, 38 of the front corrugated portion 26 can be improved due to the reduction of the overlapping portion of the meshes 29, 32; 35, 38 at the merging point.

[0064] To illustrate the results of the insect net 22 according to the present invention, in the presence of Figure 6 Insect nets according to embodiments of the present invention and having Figure 7 A comparison was made between glass plates 8 of an insect net in the closed position, based on existing technology. From Figure 7 It is clearly visible that at least the front portion of frame 21, parallel to the front panel 23 of the insect net 22, warps relative to the underlying horizontal window profile 9. Specifically, the center of the front portion of frame 21 is closer to the underlying horizontal window profile 9 than the outer end of the front portion of frame 21. The warping of the front portion of frame 21 is caused by the insect net, which has a greater thickness at the junction compared to the remaining portion of the insect net 22. As mentioned above, this is disadvantageous. Therefore, one or more intermediate tilted window profiles 6 resting between the outward tilted window profiles 6 when frame 21 is in the closed position are not subjected to the load of the glass panel 8. All the load applied to the glass panel 8 via frame 21 is absorbed by the outward tilted window profiles 6 and the underlying horizontal window profile 9.

[0065] from Figure 6 As can be seen, the front portion of frame 21 is substantially parallel to the lower horizontal window profile 9. Therefore, all the load applied to the glass panel 8 via frame 21 is absorbed by the outward-sloping window profile 6, the lower horizontal window profile 9, and the one or more intermediate-sloping window profiles. Thus, when the glass panel 8 is in its closed position, the one or more intermediate-sloping window profiles are also under load.

[0066] It should be understood that the above description is intended to illustrate the operation of preferred embodiments and not to limit the scope of the invention. Many variations will be apparent to those skilled in the art from the foregoing discussion, and these variations will still be included within the scope of the invention.

Claims

1. An insect net for a greenhouse, wherein the insect net is configured to be fixed to a ventilation plate hinged about a hinge axis, wherein in an open position of the ventilation plate, the insect net extends at least between an opening edge extending parallel to the hinge axis of the ventilation plate and an edge of the ventilation plate extending parallel to the hinge axis of the ventilation plate. The insect web includes a front plate merged into two side plates, wherein the insect web is pleated in a corrugated configuration to stack upon folding, wherein the corrugated configuration is formed having corrugated portions, wherein each corrugated portion has two parallel side corrugated portions and a front corrugated portion. Each of the side corrugated portions includes a first side mesh and a second side mesh interconnected on its longitudinal side, and both the first and second side meshes have a first short side configured to face the hinge axis and a second short side configured to face away from the hinge axis and opposite to the first short side. Each of the front corrugated portions includes a first front mesh and a second front mesh interconnected on its longitudinal side. The second short sides of the first side mesh and the second side mesh of the side corrugated portion are respectively connected to the longitudinal side of the hinge axis facing the ventilation plate of the first front mesh and the second front mesh.

2. The insect net according to claim 1, wherein each of the first front mesh and the second front mesh has a first mesh end and a second mesh end opposite to the first mesh end in its longitudinal direction, wherein, The second short sides of the first and second side meshes of the corrugated portion are respectively connected to the longitudinal side of the hinge axis facing the ventilation plate at or near the first or second mesh end of the first and second front meshes.

3. The insect net according to claim 2, wherein the first front mesh and the second front mesh are connected to each other at the first mesh end and the second mesh end.

4. The insect net according to claim 1, 2 or 3, wherein the second short sides of the first side mesh and the second side mesh of the side corrugated portion are respectively fused to the longitudinal side of the first front mesh and the second front mesh facing the hinge axis of the ventilation plate.

5. The insect net according to claim 1, 2 or 3, wherein the second short sides of the first side mesh and the second side mesh of the side corrugated portion are respectively welded to the longitudinal side of the hinge axis facing the ventilation plate of the first front mesh and the second front mesh.

6. The insect net according to claim 1, 2 or 3, wherein the second short sides of the first side mesh and the second side mesh of the side corrugated portion are respectively sewn to the longitudinal side of the hinge axis facing the ventilation plate of the first front mesh and the second front mesh.

7. The insect net according to any one of claims 1-3, wherein the longitudinal sides of the first front mesh and the second front mesh facing away from the hinge axis are respectively spaced apart from the first short side and the second short side of the first side mesh and the second side mesh.

8. The insect net according to any one of claims 1-3, wherein the longitudinal side of the first front mesh and the second front mesh facing away from the hinge axis is not connected to the first side mesh and the second side mesh.

9. The insect net according to any one of claims 1-3, wherein the first side mesh has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side, the second side mesh also has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side, and the first side mesh and the second side mesh are interconnected via the second longitudinal side; the first front mesh has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side, the second front mesh also has a first longitudinal side and a second longitudinal side opposite to the first longitudinal side, and the first front mesh and the second front mesh are interconnected via the second longitudinal side; the first side mesh and the second side mesh are connected to the first longitudinal side of the first front mesh and the second front mesh.

10. The insect net according to any one of claims 1-3, wherein the insect net has a mesh made of a woven fabric comprising warp threads and interlaced weft threads that alternately travel above and below the continuous warp threads, wherein each of the warp threads and the weft threads comprises at least one strand.

11. The insect net according to claim 10, wherein the strands are formed of plastic resin or glass fiber.

12. The insect net according to claim 11, wherein the plastic resin is a polyolefin.

13. The insect net according to claim 11, wherein the plastic resin is polyethylene, polypropylene or polyester.

14. The insect net according to any one of claims 1-3, wherein when the ventilation plate is in the open position, at least one of the side plates has a triangular shape.

15. The insect net of claim 14, wherein the mating ends of a pair of corrugated portions facing away from the front plate are farther from the front plate than the mating ends of another pair of corrugated portions facing away from the front plate, wherein the pair of corrugated portions is located between the pair of corrugated portions.

16. The insect net according to any one of claims 1-3, wherein the insect net has a mesh, the side plates comprising outermost corrugated portions and a plurality of intermediate corrugated portions interconnected along the longitudinal inner edges of their meshes, wherein each corrugated portion merges its front side into the front plate, wherein the meshes of each intermediate corrugated portion are interconnected at opposite rear ends, wherein the opposite rear ends of the outermost corrugated portions are configured to be located at or near the hinge axis, and wherein the rear ends of consecutive intermediate corrugated portions are adjacent to and extend along the outermost corrugated portion.

17. A netting system for a greenhouse, wherein the netting system includes a frame for securing the netting system to a ventilation panel, the frame being hinged about a hinge axis, and an insect netting according to any one of claims 1-16.

18. The net system of claim 17, wherein the insect net is secured to the frame by stitching.

19. A greenhouse, wherein the greenhouse includes a roof structure having an inclined upper surface with an opening and a rectangular glass panel covering the opening, wherein the glass panel is hingedly connected at its upper edge to a portion of the roof structure for hinge about a hinge axis between a closed position in which the glass panel is substantially parallel to the upper surface and an open position in which the glass panel is inclined relative to the upper surface to form a ventilation channel. The greenhouse further includes an insect net according to any one of claims 1-16, or a net system according to claim 17 or 18.

20. A method for manufacturing a corrugated portion for use in an insect net according to any one of claims 1-16, the method comprising the steps of: Provide two or more side meshes and two or more front meshes; The two side meshes are connected to each other along their longitudinal sides; Connect the two front meshes together along their longitudinal sides; and The two connected side meshes are secured to the two connected front meshes by arranging the second short side of the side mesh at the longitudinal side of the hinge axis of the front mesh, which is configured to face the ventilation panel in use, and connecting it to the longitudinal side of the front mesh.

21. The method of claim 20, wherein the side mesh is attached to the front mesh by welding, fusion or sewing.

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