EP2905390A1 - Moisture extraction device and wall provided with such a moisture extraction device - Google Patents

Moisture extraction device and wall provided with such a moisture extraction device Download PDF

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Publication number
EP2905390A1
EP2905390A1 EP15154701.5A EP15154701A EP2905390A1 EP 2905390 A1 EP2905390 A1 EP 2905390A1 EP 15154701 A EP15154701 A EP 15154701A EP 2905390 A1 EP2905390 A1 EP 2905390A1
Authority
EP
European Patent Office
Prior art keywords
wall
tube
extraction device
moisture extraction
closing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP15154701.5A
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German (de)
English (en)
French (fr)
Inventor
Hendrikus Bernardus Theodorus Schrijver
Gerardus Bernardus Franciscus Maria Schrijver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2905390A1 publication Critical patent/EP2905390A1/en
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/70—Drying or keeping dry, e.g. by air vents
    • E04B1/7069—Drying or keeping dry, e.g. by air vents by ventilating
    • E04B1/7084—Drying or keeping dry, e.g. by air vents by ventilating with Knappen systems, i.e. atmospheric siphons

Definitions

  • the present invention relates to a moisture extraction device designed for extracting moisture from a wall, the moisture extraction device comprising a tube having a length L1, an inner wall and a central axis, in which tube a partition extends parallel to the central axis, with both long sides at least substantially closely abutting against the inner wall of the tube along a length L2 ⁇ L1 in the tube, the moisture extraction device further comprising a closing device which is in contact with an end side of the partition, partially closing the tube at the corresponding short end, thereby defining at least one ventilation channel on either side of the partition, which ventilation channel is in communication with the interior of the tube, so that air can flow into the tube via one of the ventilation channels, into a first subchannel defined by a first surface of the partition and the corresponding part of the inner wall of the tube and subsequently, at the short end of the tube not closed by the closing device, to the other side of the partition into a second subchannel defined by a second surface of the partition remote from the first surface and
  • Such a moisture extraction device is known from BE 1010625A3 .
  • the known moisture extraction device has a tubular element of hardened clay of rectangular cross-section, whose outer circumference substantially corresponds to that of the front end of a brick, which element is placed in a rectangular recess in an outer wall of a cavity wall in use.
  • a plate having a sealing surface whose outer circumference corresponds to the outer circumference of the tubular element partially closes a short end of the tube in use, leaving open a rectangular through hole in the centre thereof.
  • the tubular element is placed in a wall by removing a brick from a brick wall and subsequently inserting the tubular element into the space in question and fixing it in the wall using mortar.
  • relatively small i.e.
  • low bricks for example so-called Waal bricks
  • part of a brick of a layer located below or above the aforesaid brick is additionally removed.
  • a rectangular frame is inserted into the rectangular through hole as well as a clock-shaped body provided with a partition which divides the tubular element into a left-hand subchannel and a right-hand subchannel, leaving open a ventilation channel between the frame and the bell-shaped body on the left-hand side and on the right-hand side of the clock-shaped body.
  • the tubular element is passed through an outer wall of a cavity wall, with the end opposite the framework abutting against an inner wall, so that the end in question is closed by the inner wall.
  • BE 1010625 refers to NL 183148, published in 1983 , which likewise discloses a moisture extraction device comprising a rectangular tubular element having dimensions that correspond to those of a brick.
  • a drawback of the known moisture extraction device is the fact that leakage flows develop in the tubular element in particular if the tubular element is made of a porous, moisture-permeable material, such as hardened clay.
  • the reason is that the tubular element, which has been obtained by shortening a long clay tube produced by means of an extrusion process and subsequently allowing the clay to harden, has relatively large tolerances.
  • the partition must therefore be made slightly narrower than the interior dimension of the tubular element, as a result of which leakage flows develop in use.
  • Another drawback of the known device is that frequently the tubular element and the frame do not abut properly against the cavity in the wall, so that a gap must be filled with mortar.
  • the tube has a circular cross-section.
  • a long tube having a circular cross-section has a greater resistance against deformation upon being shortened than a known tube having a rectangular cross-sectional shape, which is slightly compressed upon being shortened by means of a knife.
  • the tolerances of the tubes according to the present invention are thus significantly smaller than in the case of the rectangular cross-sectional shape.
  • the tube is preferably a length of pipe
  • the tube may either be a length of pipe or be formed by the wall that surrounds the partition.
  • the closing device may have an outer circumference that corresponds to that of the outer circumference of the tube, wherein the closing device abuts against the respective end side of the tube.
  • the outer circumference of the closing device may correspond with the internal diameter of the tube, or in other words, the cylindrical hole in the wall, wherein an outer edge of the closing device closely abuts against the inner wall of the tube (wall).
  • the tube is made of a porous, moisture-permeable material.
  • the wall of the tube preferably prevents, at least substantially so, air flowing from the wall cavity into the tube, or conversely from the tube into the wall cavity. Preventing the occurrence of an air flow need not imply that no air can enter the tube from the wall cavity, or conversely. It does imply, however, that there is no possibility of a so-called gust of wind penetrating through the wall of the tube.
  • the permeability to moisture of the tube contributes toward the discharge of moisture from the wall, because moisture can be transported from outside the tube to inside the tube through the permeable wall of the tube.
  • the tube is made of a ceramic material, preferably clay.
  • Ceramic material, and in particular hardened clay is highly suitable for use as a porous, moisture-permeable material which is capable of transporting moisture and which thus helps prevent the unimpeded passage of a strong air flow through the material.
  • the length L1 is greater than the thickness of bricks of an outer wall of a cavity wall in which the moisture extraction device is or at least is considered to be installed.
  • the length L4 preferably substantially corresponds to the thickness of the outer wall in question plus the depth of the cavity.
  • the total length L1 plus L4 preferably ranges between 6 and 16 cm, preferably between 8 and 15 cm, even more preferably between 10 and 14 centimetres.
  • the dimension depends on the cavity wall in which the moisture extraction device is installed in use.
  • pre-war cavity walls have a cavity of 3 to 5 cm
  • cavity walls dating from shortly after or a medium long period after the war have a cavity of 5 to 8 cm
  • late post-war (recent) cavity walls have a cavity of 10 to 13 cm.
  • the tube is preferably 2-4 cm longer than the depth of the cavity in question, so that the tube is supported on the outer leaf of the wall along a length of 2-4 cm.
  • the length L1 is smaller than the thickness of bricks of a solid wall, or outer wall of a compound wall, in which the moisture extraction device is or at least is considered to be installed.
  • the total length L1 plus L4 preferably ranges between half and three quarters the thickness of the wall in question, preferably between 0.6 and 0.7 the thickness of the wall in question.
  • a cylindrical hole is provided in the wall, in which case the inner wall of the cylindrical hole can be regarded as the inner wall of the tube.
  • the tube thus forms an integral part of the wall in that case. It is advantageous in that case to drill one hole having one diameter in the wall in which the closing device fits with a close fit, whether or not surrounded by a mounting tube.
  • the external diameter of the closing device is fractionally smaller than the internal diameter of the tube formed by the hole in the wall.
  • the closing device comprises an outer wall in which a recess is present, which recess extends in a path from an edge that faces the tube in use along part of the length of the outer wall of the closing device.
  • said path extends at least substantially parallel to the central axis of the closing device over a first part thereof and perpendicular to the central axis and/or in the direction of the edge over a second part thereof.
  • the device preferably comprises a mounting tube having an internal diameter which corresponds to the external diameter of the outer wall of the closing device, such that the closing device can be moved into and out of the mounting tube with a close fit.
  • a mounting tube makes for an easy installation of the moisture extraction device.
  • the mounting tube is provided with a projection on the inner wall, which projection is configured to be received in the recess in the outer wall of the closing device. This is a simple manner of providing a pin for the bayonet closure.
  • the present invention relates to a cavity wall provided with at least one moisture extraction device, preferably a multitude of moisture extraction devices.
  • a wall provided with the known moisture extraction device experiences the drawbacks described in the foregoing in relation to the first aspect of the invention.
  • the invention provides a wall comprising an inner wall and an outer wall and a cavity having a depth D present therebetween, and at least one device installed in a hole in the outer wall for the moisture extraction device for extracting moisture from the wall, the moisture extraction device comprising a tube defining an air guide channel located between two ventilation channels extending in different directions, which tube has a length L1', an inner wall and a central axis, in which tube a partition extends parallel to the central axis, at least substantially closely abutting against the inner wall of the tube on both long sides along a length L2' ⁇ L1', wherein L1'>D, so that the tube on the one hand forms a sealing wall between the aforesaid hole and the surrounding cavity and on the other and extends in the outer wall along a length of at least L3 ⁇ the thickness of the outer wall, which tube is partially closed by a closing device as defined in the first aspect of the invention, characterised in that the tube has a circular cross
  • the present invention relates to a wall configured as a one-brick wall, comprising at least one moisture extraction device installed in a hole in the outer wall for extracting moisture from the wall, the moisture extraction device comprising a cylindrical hole defining an air guide channel located between two ventilation channels extending in different directions, which hole has a length L4, an inner wall and a central axis, in which cylindrical hole a partition extends parallel to the central axis, at least substantially closely abutting against the inner wall of the tube on both long sides along a length L2" ⁇ L4, which cylindrical hole is partially closed by a closing device as defined in the first aspect of the invention.
  • the closing device projects outward from the outer wall on the side remote from the tube, thus providing a projecting part between the two ventilation channels, wind flowing past the outer wall in question will be more easily guided into the tube via one of the ventilation channels.
  • a hole having a uniform diameter can be formed in a wall, into which first the tube and subsequently the closing device is placed.
  • the closing device may abut against the tube with an end side of the (cylindrical) extended part, but the two may also be spaced some distance apart.
  • the tube of the at least one moisture extraction device is immovably fixed in the wall, with the closing device being removably accommodated in the tube. This removability of the closing device makes it easy cleaning of the (tube of the) moisture extraction device possible.
  • orientations are related to the position of use of the moisture extraction device, i.e. a tube horizontally installed in a wall, which comprises a partition that extends vertically within the tube.
  • a moisture extraction device 1 being an exemplary embodiment of a moisture extraction device according to the present invention, is shown in perspective view, horizontal cross-sectional view and vertical cross-sectional view, respectively.
  • the moisture extraction device 1 comprises a cylindrical tube 2 of dried clay having a length L1 of 10 cm, an internal diameter of 5.6 cm and an external diameter of 7.6 cm.
  • the tube 2 is open at both ends, at one of the two ends, however, the tube 2 is partially closed by a closing device 3, in this case a CARE (ceramic air round element) brick.
  • the closing device 3 has a cylindrical wall 4 whose outer circumference has a diameter of 7.6 cm, which wall is interrupted on opposite sides for providing an air channel. A diameter of 7.6 cm corresponds to the outer circumference of the tube 2, i.e. it is substantially aligned therewith.
  • a plate 5 of plastic material extends into the tube 3, forming a partition.
  • the plate 5 has a width of 5.5 cm and thus closely abuts against the inner wall 7 of the tube 2 on its long sides 6a, 6b, extending along a length L2 of 9.5 cm through nearly the entire length of the tube 2.
  • the closing device 3 On the side remote from the plate 5, the closing device 3 has an end wall 8 which extends perpendicularly to a central axis of the cylindrical wall 4, from which end wall a wedge-shaped element 10 diverges away from the tube 2.
  • Located between each of the two diverging sides and the cylindrical wall 4 of the closing device 3 is an opening of respective ventilation channels 11 a, 11b that extend through the closing device 3.
  • the ventilation channel 11 a is in communication with the subchannel 9a and the ventilation channel 11b is in communication with the subchannel 9b.
  • an air flow channel is formed, which channel extends from the ventilation channel 11 a to the subchannel 9a, via a space left open by the plate 5 in the tube 2, through the subchannel 9b and subsequently through the ventilation channel 11 b.
  • FIG 4 shows in horizontal cross-sectional view the moisture extraction device 1 of figures 1-3 installed in a wall comprising an inner wall 21, an outer wall 22 and a wall cavity 23 present therebetween.
  • the wall cavity is represented as a cavity here, but it may just as well be filled with an insulation material.
  • the space for the moisture extraction device 1 can be provided in a simple manner by drilling a hole having a diameter of 7.6 cm (in the case of the moisture extraction device 1 of the present embodiment), in the outer wall 22.
  • An advantage of the circular cross-section is that a round hole for moisture extraction devices according to the present invention is easier to make than a rectangular hole as used for a moisture extraction device known so far. In this way the installation costs are reduced.
  • the tube 2 can then be inserted into the hole until the leading end side of the tube 2 is at least largely closed by the inner wall 21. It is important that the tube 2 has a length greater than the depth of the cavity 23 and smaller than the depth of the cavity 23 plus the thickness of the outer wall 22. In this embodiment the sum of the length of the tube 2 and the length of the cylindrical wall 4 of the closing device 3 corresponds to the sum of the thickness of the outer wall 22 and the depth of the cavity 23.
  • the closing device 3 is moved into the cavity with the plate 5 aligned in vertical position until the end side of the cylindrical wall 4 of the closing device 3 comes into contact with the end side of the tube 2.
  • the wedge-shaped element 10 will guide air that flows past the outer wall 22 into a ventilation channel, in this case the ventilation channel 11a, in the tube 2, viz. into the subchannel 9a.
  • the air is forced to follow the subchannel 9a up to the end of the tube 2 and is subsequently guided into the subchannel 9b at the end of the tube 2 via the inner wall 21 that closes the tube 2.
  • the air will flow back to the outer wall 22 and subsequently to the outside via the ventilation channel 11 b.
  • This air flow is enhanced by the occurrence of a Venturi effect near the mouth of the ventilation channel 11b.
  • the air flow is indicated by arrows in figure 4 .
  • the inner wall 21, and thus the part of the inner wall 21 that closes the end side of the tube 2 will be moist.
  • the tube 2, too, will absorb moisture on the outer side in that case, which moisture will spread over the entire thickness of the tube 2 as a result of the moisture-absorbing and moisture-transmitting property of the tube and will thus be transported to the inner wall 7 of the tube 2.
  • moisture will be given off to the air in the tube 2.
  • Said relatively moist air is continuously ventilated by the above-described air flow and replaced by relatively dry air.
  • the direction of the wind is unimportant, because a reverse air flow will occur, with the same effect, of course, when the wind blows in the opposite direction.
  • FIG. 5 shows in horizontal cross-sectional view a moisture extraction device 31 according to the present invention installed in a one-brick wall 25.
  • the respective reference numerals have been incremented by 30 so as to avoid repeating a detailed introduction of elements.
  • a cavity 24 has been drilled in the one-brick wall 25.
  • the cavity 24 has a depth of 14 cm so that, also in this case, the 9.5 cm long plate 35 of the closing device 33 will extend inward into the cavity 24 to about 0.5 cm from the end of the cavity when the end wall of the closing device 33 is aligned with the outer side of the one-brick wall 25.
  • a difference of the moisture extraction device 31 in comparison with the moisture extraction device 1 is that a separate tube is missing.
  • the cavity 24 in the one-brick wall 25 performs the tube function is self.
  • the plate 35 is wider than the plate 5 of the moisture extraction device 1, viz. just as wide as the external diameter of the cylindrical wall 34.
  • the side edges 36a, 36b (not shown in figure 5 ) of the plate 35 thus abut closely against the inner wall of the cavity 24.
  • the operation of the moisture extraction device 35 is in large measure similar to that of the moisture extraction device 1, with this difference that no transfer of moisture via a separate tube needs to take place.
  • the figures show in perspective view a closing device 53 ( figure 6 ) from which a partition that is provided in use has been left out, and a mounting tube 80 ( figure 7 ) for use in an alternative embodiment of a moisture extraction device according to the present invention.
  • a closing device 53 figure 6
  • a mounting tube 80 figure 7
  • those elements that correspond to comparable elements of the closing device 3 shown in figures 1-4 are indicated by a reference numeral that has been incremented by 50 in comparison with figures 1-4 . In order to avoid repetition, not all the elements will be introduced anew here.
  • the closing device 53 is different from the closing device 3 in that an L-shaped recess 62 is provided in the cylindrical wall 54 of the closing device 53, which recess initially extends from the end remote from the wedge 60 in a first path parallel to the central axis of the closing device 53 and subsequently perpendicular thereto.
  • a mounting tube 80 is shown in perspective view.
  • the mounting tube 80 has an inner wall 81 whose internal diameter is just sufficiently larger than the external diameter of the cylindrical wall 54 of the closing device 53 for sliding the mounting tube 80 over the cylindrical wall 54 of the closing device 53.
  • a pin 82 projects inward from the inner wall 81, such that it is received in the recess 62 when the mounting tube 80 is moved over the closing device 53. In this way a bayonet-like lock is provided, which secures the closing device 53 against unintentional detachment from the mounting tube 80.
  • FIG 8 shows a view comparable to figure 4 , with this understanding that in this case the mounting tube 80 and the closing device 53 are provided.
  • a moisture extraction device 51 installed in a wall comprising an inner wall 71, an outer wall 72 and a wall cavity 73 present therebetween.
  • the space for the moisture extraction device 51 can be provided in a simple manner by drilling a hole having a diameter that corresponds to the outer circumference of the mounting tube 80 in the outer wall 22. Subsequently the tube 52 can be moved into the hole until the leading end side thereof makes contact with the inner wall 71, so that the leading end side of the tube 52 is at least largely closed by the inner wall 71. Following that, the mounting tube 80 is inverted into the hole.
  • the external diameter of the mounting tube 80 is the same as that of the tube 52, and the mounting tube 80 is pressed against the tube.
  • the mounting tube may have a larger diameter, and a stepped hole may be provided in the outer wall 72.
  • the mounting tube 80 furthermore need not directly abut against the tube 52.
  • the closing device 53 may be periodically removed from the mounting tube 80, so that any impurities that may be present in the tube 52, and thus in the ventilation channels 59a, 59b, can be removed from the tube. Subsequently the closing device 53 is put back into place again.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Drying Of Gases (AREA)
  • Ventilation (AREA)
EP15154701.5A 2014-02-11 2015-02-11 Moisture extraction device and wall provided with such a moisture extraction device Ceased EP2905390A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2012238A NL2012238C2 (nl) 2014-02-11 2014-02-11 Ontvochtigingsinrichting en muur voorzien van een dergelijke ontvochtigingsinrichting.

Publications (1)

Publication Number Publication Date
EP2905390A1 true EP2905390A1 (en) 2015-08-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15154701.5A Ceased EP2905390A1 (en) 2014-02-11 2015-02-11 Moisture extraction device and wall provided with such a moisture extraction device

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EP (1) EP2905390A1 (nl)
NL (1) NL2012238C2 (nl)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1191621A (fr) * 1958-02-17 1959-10-21 Procédé pour l'assèchement des murs
CH394564A (de) * 1961-02-09 1965-06-30 Schoenlechner Johann Mauerentfeuchter, eingesetzt in eine geneigt angeordnete Aussparung oder ein Bohrloch einer Mauer
FR2142767A1 (nl) * 1971-06-24 1973-02-02 Ambos Edmond
NL183148C (nl) 1981-10-22 1988-08-01 Schrijver Systeem Vochtbestrij Inrichting voor het onttrekken van vocht aan een muur of ander soortgelijk metselwerk.
FR2674553A1 (fr) * 1991-03-29 1992-10-02 Kinghron Ltd Dispositif d'assechement des murs compose d'un corps poreux cylindrique en resines thermoplastiques sur le perimetre entier.
BE1010625A3 (nl) 1996-09-13 1998-11-03 Schrijver Systeem Vochtbestrij Verbeterde inrichting voor het onttrekken van vocht aan een muur of dergelijke.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1191621A (fr) * 1958-02-17 1959-10-21 Procédé pour l'assèchement des murs
CH394564A (de) * 1961-02-09 1965-06-30 Schoenlechner Johann Mauerentfeuchter, eingesetzt in eine geneigt angeordnete Aussparung oder ein Bohrloch einer Mauer
FR2142767A1 (nl) * 1971-06-24 1973-02-02 Ambos Edmond
NL183148C (nl) 1981-10-22 1988-08-01 Schrijver Systeem Vochtbestrij Inrichting voor het onttrekken van vocht aan een muur of ander soortgelijk metselwerk.
FR2674553A1 (fr) * 1991-03-29 1992-10-02 Kinghron Ltd Dispositif d'assechement des murs compose d'un corps poreux cylindrique en resines thermoplastiques sur le perimetre entier.
BE1010625A3 (nl) 1996-09-13 1998-11-03 Schrijver Systeem Vochtbestrij Verbeterde inrichting voor het onttrekken van vocht aan een muur of dergelijke.

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Publication number Publication date
NL2012238C2 (nl) 2015-08-17

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