Multilayer wooden panel

Abstract

The invention relates to a multi-layer wooden panel having a plurality of insulating layers (2, 3) which follow one another in an insulating direction (1), wherein a plurality of spacer webs (4, 5) are provided for each insulating layer (2, 3), said spacer webs being spaced apart from one another so as to form diffusion channels (8, 9) and running parallel to one another, and the spacer webs (4, 5) of adjacent insulating layers (2, 3) run transversely to one another. In order to provide a wooden panel which has an improved thermal insulation performance in an insulation direction (1) despite a low weight while still being open to diffusion transversely to the insulation direction (1), the invention proposes that partition panels (6, 7) closing off the diffusion channels (8, 9) in the insulation direction (1) are provided between the insulating layers (2, 3).

Description

[0001] Multilayer wooden panel

[0002] Technical area

[0003] The invention relates to a multi-layer wooden panel with several insulation layers arranged successively in an insulation direction, wherein for each insulation layer several spacer webs are provided which are spaced apart from one another and run parallel to one another to form diffusion channels, and the spacer webs of adjacent insulation layers run transversely to one another.

[0004] State of the art

[0005] EP0560013A1 discloses multi-layer wood panels for use as wall, ceiling, or roofing elements. The individual layers are formed from spaced-apart spacers arranged transversely or parallel to each other in successive layers.

[0006] The transverse arrangement results in high stability, while the parallel arrangement prevents air permeability. Nevertheless, the resulting thermal insulation of such wood panels is low.

[0007] Description of the invention

[0008] The invention is therefore based on the object of proposing a wooden panel of the type described at the outset which, despite its low weight, has improved thermal insulation performance in one insulation direction, but is permeable to diffusion transversely to this insulation direction.

[0009] The invention achieves this objective by providing partition plates between the insulation layers that close off the diffusion channels in the direction of insulation. Thanks to the structural, self-supporting partition plates, the spacers within an insulation layer can be spaced further apart, and the insulation layers can have a greater layer thickness, creating multiple non-flow-connected diffusion channels that enclose a larger air volume overall, thus enabling better thermal insulation. At the same time, despite the additional partition plates, the wood volume is reduced relative to the total volume, thus enabling savings in terms of weight and material consumption.The many separate diffusion channels, which also run transversely to one another in successive insulation layers, allow for reliable removal of moisture diffusing through the partition panels transversely to this insulation direction, despite the good insulating properties in the insulation direction. To improve the diffusion properties, the partition panels can be made of solid wood. The partition panels can have a thickness of at least 2 mm, preferably at least 5 mm, and particularly preferably at least 8 mm. To improve the insulating properties, at least 2, preferably at least 3, and especially when used as an exterior wall, at least 5 insulation layers can be provided. The wood panels according to the invention can be closed off on their front and back sides by a partition panel or by a separate cover panel, thus opening up a wide range of design options.In a preferred embodiment, the spacer bars in successive insulation layers can run alternately parallel to the top edge and parallel to the side edge of the wood panel, which further increases the modularity of the wood panels according to the invention when constructing wood walls. For the purposes of the invention, spacer bars can be considered individual, spaced-apart strips. The spacer bars can have a rectangular cross-section. In a preferred embodiment, the spacer bars can extend across the entire insulation layer from partition panel to partition panel.

[0010] To facilitate installation work in diffusion ducts according to the invention, the side surfaces of the spacer bars facing the diffusion ducts can run parallel to each other. This measure allows the spacer bars and the separating plates to form diffusion ducts in the insulation layer with a rectangular cross-section, thus facilitating the installation of water, gas, or electrical lines by avoiding hard-to-reach undercuts or constrictions.

[0011] To further improve the thermal insulation performance of a wood panel according to the invention, it is proposed that longitudinal wood surfaces and end grain surfaces be adjacent to each other in the contact area between spacer bars and separating plates. This measure results in a change in the grain direction in the contact area, with fiber directions in the insulation direction alternating with fiber directions perpendicular to the insulation direction. This further reduces heat conduction in the insulation direction between the spacer bars and the separating plates.

[0012] For improved moisture management within the diffusion channels, the diffusion channels can be defined by longitudinal wood surfaces of the partition panels and longitudinal wood surfaces of the spacer bars. The longitudinal wood surfaces facing the diffusion channels reduce moisture penetration into the partition panels or spacer bars, thus improving moisture transport within the wood panels.

[0013] To facilitate the production of the partition panels, it is recommended that the grain directions of the partition panels run essentially perpendicular to the insulation direction. This ensures that the grain directions of the partition panels run along their surface area, which facilitates production from solid wood sawn along the grain and growth direction.

[0014] To give the wood panel additional rigidity, the fiber direction of the spacer bars can run essentially in the direction of the insulation. This prevents unwanted twisting and distortion. In a preferred embodiment, the fiber direction runs at an angle of 45° to the insulation direction. Particularly favorable construction conditions arise if, in addition to the fiber direction of the spacer bars running essentially in the direction of the insulation, the fiber direction of the partition panels runs essentially perpendicular to the insulation direction.

[0015] The structural integrity of the wood panel can be improved by forming the partition panels with partition boards whose longitudinal directions run diagonally to the adjacent spacers. This means that each partition board is in contact with a large number of spacers, which in turn results in increased rigidity and stability. Furthermore, the joints between the partition boards provide improved diffusion conditions for moisture transport into the diffusion channels, with moisture transport into several parallel diffusion channels being enabled via a joint. Stability can be increased even further if the longitudinal directions of the partition boards run at an angle of 30° to 60°, preferably 45°, to the longitudinal direction of the adjacent spacers. Advantageous manufacturing conditions arise when the longitudinal directions of the partition boards run essentially parallel to the grain of the partition boards.

[0016] The static properties of a wood panel according to the invention are further improved when the longitudinal directions of the separating boards of successive separating panels in the insulation direction run transversely to each other. Consequently, the weak points of a separating panel, for example, the joints between individual separating boards, are compensated for by the subsequent separating panel in the insulation direction. Particularly favorable static properties are achieved when the longitudinal directions of the separating boards of successive separating panels in the insulation direction run at an angle of 80° to 100°, preferably 90°, to each other.

[0017] Improved stability combined with cost-effective material provision can be achieved by using spacers glued parallel to the grain to form the spacer bars. Because the spacer bars consist of individual spacers, the impact of the wood's shrinkage and swelling behavior on the stability of the wood panel is reduced. Furthermore, otherwise unusable wood scraps can be used in a wood panel according to the invention.

[0018] To ensure stable spacers, it is recommended that the abutting surfaces of the spacers run diagonally to the longitudinal direction of the spacers. These diagonal abutting surfaces can increase the bonding area compared to abutting surfaces that run orthogonally to the longitudinal direction, thereby increasing the adhesion between the individual spacers.

[0019] The invention also relates to a wooden wall composed of several wooden panels according to the invention. The indoor climate of rooms with walls according to the invention can be improved by merging the diffusion channels of adjacent wooden panels into one another, insulating layer by layer. This allows moisture diffused through the partition panels to be passed through the diffusion channels behind them across the entire wall surface or even into neighboring rooms, thus achieving uniform humidity, for example, in living spaces. This improves the indoor air quality and prevents mold growth.

[0020] To facilitate the construction of interior spaces enclosed by timber walls according to the invention, it is proposed that a group of diffusion channels form ducts. Due to the large number of diffusion channels, the moisture removal through individual ducts is not significantly impaired. Electrical or plumbing lines, for example, can be laid in such ducts, with a duct extending across at least two insulation layers in a preferred embodiment. Because the diffusion channels in adjacent insulation layers preferably run transversely to one another, this measure allows any point on the wall surface to be reached by ducts. Brief description of the invention

[0021] The drawing shows an example of the subject matter of the invention.

[0022] Fig. 1 is a schematic exploded view of a wooden panel according to the invention with a cable duct,

[0023] Fig. 2 a detailed view of the spacer bars of such a wooden panel in a larger scale and

[0024] Fig. 3 a schematic cross-section of a wooden wall with wooden panels according to the invention

[0025] Ways to implement the invention

[0026] A wood panel according to the invention comprises several insulation layers 2, 3 arranged consecutively in an insulation direction 1. Spacer bars 4, 5 are provided in each insulation layer 2, 3, with the spacer bars 4 of one insulation layer 2 running transversely to the spacer bars 5 of a subsequent insulation layer 3. Separating plates 6, 7 are provided between the insulation layers 2, 3. Thus, diffusion channels 8, 9 are formed between the spacer bars 4, 5 and the separating plates 6, 7, through which moisture introduced into the wood panel can be transported away.

[0027] In a preferred embodiment, longitudinal wood surfaces 10 and end grain surfaces 11 lie adjacent to one another in the contact area of ​​the spacer webs 4, 5 and the separating plates 6, 7. As can be seen in particular from Fig. 2, the fiber directions of the spacer webs 4, 5 in the illustrated embodiment run essentially in the insulation direction 1, whereas the fiber directions of the separating plates 6, 7 run essentially transversely to this insulation direction 1.

[0028] The individual partition panels 6, 7 can be made of individual partition boards 12 that are joined together along joints 13. Preferably, the longitudinal direction of these partition boards 12 runs diagonally to the adjacent spacer webs 4, 5, with the longitudinal direction of the partition boards 12 of a partition panel 6 preferably running transversely to the longitudinal direction of the partition boards 12 of an adjacent partition panel 7.

[0029] The spacers 4, 5 can be constructed from individual spacers 14 that are glued to each other parallel to the fibers, as can be seen in particular in Fig. 2. To improve stability, the abutting surfaces of the spacers 14 can run obliquely to the longitudinal direction of the spacers 4, 5 in the sense of a scarf joint.

[0030] As can be seen in particular from Fig. 3, a group of diffusion channels 8, 9 can form a conduit channel for a conduit 15 shown schematically in Fig. 3. Such conduit channels can run in at least two consecutive insulation layers 2, 3, so that any desired point in a wooden wall constructed from the wood panels according to the invention can be reached with such conduits 15.

[0031] The diffusion channels 8 of an insulation layer 2 can run horizontally, while the diffusion channels 9 of an adjacent insulation layer 3 can run vertically. This allows, when constructing a wooden wall (not shown in detail), the diffusion channels 8, 9 of adjacent wooden panels to merge into one another in such a way that the diffusion channels 8, 9 of an insulation layer 2, 3 of a wooden panel merge into exactly one insulation layer 2, 3 of a neighboring wooden panel.

Claims

Patent claims 1. Multi-layer wooden panel with several insulation layers (2, 3) following one another in an insulation direction (1), wherein for each insulation layer (2, 3) several spacer webs (4, 5) are provided which are spaced apart from one another and run parallel to one another to form diffusion channels (8, 9), and the spacer webs (4, 5) of adjacent insulation layers (2, 3) run transversely to one another, characterized in that separating plates (6, 7) which close off the diffusion channels (8, 9) in the insulation direction (1) are provided between the insulation layers (2, 3).

2. Multi-layer wooden panel according to claim 1, characterized in that in the contact area of ​​spacer webs (4, 5) and separating plates (6, 7) longitudinal wood surfaces (10) and end grain surfaces (11) lie against one another.

3. Multi-layer wooden panel according to claim 1 or 2, characterized in that the fiber directions of the spacer webs (4, 5) run substantially in the insulation direction (1).

4. Multi-layer wooden panel according to one of claims 1 to 3, characterized in that the separating plates (6, 7) are formed by separating boards (12) whose longitudinal directions run obliquely to the adjacent spacer webs (4, 5).

5. Multi-layer wooden panel according to claim 4, characterized in that the longitudinal directions of the separating boards (12) of separating plates (6, 7) following one another in the insulation direction (1) run transversely to one another.

6. Multi-layer wooden panel according to one of claims 1 to 5, characterized in that spacers (14) glued parallel to the fibers form the spacer webs (4, 5).

7. Multi-layer wooden panel according to claim 6, characterized in that the abutting surfaces of the spacers (14) run obliquely to the longitudinal direction of the spacer webs (4, 5).

8. Wooden wall made of several wooden panels according to one of the preceding claims, characterized in that the diffusion channels (8, 9) of adjacent wooden panels open into one another in an insulating layer-wise manner.

9. Wooden wall according to claim 8, characterized in that a group of diffusion channels (8, 9) form conduction channels.

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