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EP0292717B1 - Dispositif pour sécher du bois de sciage - Google Patents

Dispositif pour sécher du bois de sciage Download PDF

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Publication number
EP0292717B1
EP0292717B1 EP19880106746 EP88106746A EP0292717B1 EP 0292717 B1 EP0292717 B1 EP 0292717B1 EP 19880106746 EP19880106746 EP 19880106746 EP 88106746 A EP88106746 A EP 88106746A EP 0292717 B1 EP0292717 B1 EP 0292717B1
Authority
EP
European Patent Office
Prior art keywords
air
flow
drying
stack
timber
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.)
Revoked
Application number
EP19880106746
Other languages
German (de)
English (en)
Other versions
EP0292717A2 (fr
EP0292717A3 (fr
Inventor
Reinhard Dipl.-Ing. Brunner
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.)
BRUNNER TROCKENTECHNIK GmbH
Original Assignee
BRUNNER TROCKENTECHNIK GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6328410&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0292717(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BRUNNER TROCKENTECHNIK GmbH filed Critical BRUNNER TROCKENTECHNIK GmbH
Priority to AT88106746T priority Critical patent/ATE91776T1/de
Publication of EP0292717A2 publication Critical patent/EP0292717A2/fr
Publication of EP0292717A3 publication Critical patent/EP0292717A3/fr
Application granted granted Critical
Publication of EP0292717B1 publication Critical patent/EP0292717B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/16—Wood, e.g. lumber, timber

Definitions

  • the invention relates to a method for drying sawn timber, which is stacked in a drying room with the interposition of stacking strips, with air passed between the sawn timber layers, air flows generated with at least one fan being directed in time sequence to different partial areas of the stack entry level with the aid of flow control devices.
  • the invention further relates to a device for performing such a method.
  • a drying chamber It is known for a drying chamber to approximately calculate the air speed within the wood stack from the chamber geometry, the delivery capacity of the fans, the flow resistance of the heating register, the size and arrangement of the wood stack, and the stacking factor, and during drying depending on the type of wood, wood thickness and wood moisture as well as the desired quality by Set the fan speed to suitable values.
  • a number of parameters are not taken into account in this calculation, for example the accuracy of the stacking, so-called air short circuits, the surface properties of the wood, changes in the wood layers due to shrinkage, unsuitable stacking strips and the like, which is why the flow velocities between the individual woodcut layers can deviate significantly from the desired value .
  • the flow directing elements therefore have the effect of a flow straightener, which directs a directed air flow obliquely from above against the stack entry level.
  • a crank drive By means of a crank drive, all flow guide elements are simultaneously pivoted back and forth in such a way that the air flow directed by flow guide elements periodically sweeps over the stack entry plane between the upper and lower ends.
  • the invention is based on the object of specifying a process for drying sawn timber with which not only the Known drying deficiencies can be avoided, but this creates the possibility to dry different types of wood with deviations in thickness and / or drying properties simultaneously in a chamber more economically and with better quality than is possible with the known methods.
  • This object is achieved by a method having the features of claim 1.
  • the extent of the air flow concentration is set for each partial area of the stack entry level as a function of measured values of the wood moisture and / or the moisture gradient in the wood.
  • the required air velocity profile is preferably set and changed by changing the air duct before the air enters between the sawn timber layers, since in this way a very effective influence on the flow velocity between the timber layers can be achieved even with a large stack height. If necessary, the amount and / or pressure of the air can of course also be varied between the layers of lumber before entering.
  • the measured values of wood moisture and / or air speed are recorded at points which lie at different heights above the floor of the drying room. In the case of a greater depth of the drying space, it will generally also be necessary to also record the measured values at different depths, that is to say at different horizontal distances perpendicular to the direction of flow through the stack or stacks. There are limit values for the speed of a continuous air flow through the wood piles, which are usually observed in order not to jeopardize a good drying result and to achieve economical drying.
  • an upper limit is determined by the type, thickness, moisture and moisture gradient as well as by the chamber climate. The feared formwork may result in this limit being exceeded for a longer period of time if the moisture gradient across the board cross-section (the moisture gradient) becomes too large when the layers of wood near the surface dry quickly. If shuttering has occurred, not only is the further drying progress slowed considerably; there is also a risk of the wood being destroyed by cracking.
  • the lower limit of the continuous air speed depends on the length of the airway through the stacks. If the speed is too low, the air will reach its moisture equilibrium with the wood surface before the stack exits, and above the fiber saturation (e.g. always with freshly sawn wood) its full saturation, so that it cannot absorb any more moisture from the wood the rest of the way through the stack. As a result, an increasing wood moisture profile occurs along the airway through the stacks in the course of drying, in the case of reversing operation symmetrically to the center of the stack.
  • a high speed, concentrated air stream is sequentially directed to all areas of the stack entrance.
  • the concentration is achieved by a suitable position of the fans and / or air steering devices. Since at high speed the dwell time of certain air volumes within the stack is only short, they cannot get close to the moisture balance with the wood or its saturation moisture. Due to the relatively sluggish moisture transport of wood, shuttering cannot occur if the phases of high speed do not last too long.
  • the temporal mean value of the air speed which is decisive for the drying progress, can easily be reduced by selecting the duration of the high speed phases for individual stacking areas to be small enough compared to the duration of the low speed.
  • the invention is also based on the object of providing a drying device for carrying out the method according to the invention. This object is achieved by a drying device with the features of claim 6.
  • the flow directing device has adjustable air guiding surfaces, because by means of such air guiding surfaces the required air quantities can be supplied to the different parts of the stack or the different wood parts in a simple manner regardless of how large the remaining air quantities are.
  • the position of the fan or fans influences the air distribution to the individual gaps between the wooden layers, mah can also influence the speed of the individual air flows by adjusting, for example pivoting, the fans. As a rule, however, adjustability of the fans will only be sufficient in connection with air guiding surfaces.
  • the air guiding surfaces and, if adjustable, the fans can have a manual drive.
  • servomotors are preferably provided in order to be able to carry out the adjustment via a control device or a regulating device.
  • the air guiding surfaces designed as deflection elements are advantageously arranged on at least one of the two ends of this flow channel. With their help, the deflection can then take place in such a way that the required air streams are applied to the inlet openings of the spaces between the wooden layers.
  • air guiding surfaces designed as deflection elements can be provided at different heights on the air inlet and outlet sides of the lumber stack.
  • These deflection elements can be arranged in a holder both pivotable about a horizontal axis and adjustable in the vertical direction.
  • One can then sort of divide the entire stack height into several sections, within which the air flows can be adjusted or regulated independently of one another. It may therefore be desirable to be able to adjust and position the deflection elements independently of one another.
  • These positions can be determined, for example, as a function of the wood moisture and the wood moisture differences derived therefrom, taking into account the height positions of the individual measuring points, by means of a process computer and converted into the necessary control commands.
  • feedback potentiometers on the servomotors can record the current position.
  • the flow control can also be selected so that stack parts are at least partially no longer supplied with the circulating air.
  • each fan is preferably adjustable independently of the others about a vertical axis, so that the air flows can be directed to one or more areas along the chamber depth with a suitable rotation. If maximum rotation angles of more than 180 ° (eg 270 °) are selected, a reversal of the air direction can also be achieved with fans that are only designed for one direction of rotation and are therefore about 1 - 20% more efficient than reversible fans.
  • each fan can preferably be adjusted independently of the others about a horizontal axis in order to direct the air flows onto selectable horizontal wood layers when suitably positioned .
  • wood moisture compensation can also be achieved with different wood moisture levels in the area of the air inlet and the air outlet of the channels formed by the wood layers by reversing times of different lengths.
  • air guiding surfaces on both sides of the drying room are advisable.
  • a drying chamber 1 for receiving at least one wood stack 2, which consists of the lumber 3 to be dried and the stacking strips arranged between two adjacent layers of lumber, has a cubic shape in the exemplary embodiment and is provided on one end face with a gate, not shown, which during the drying process closes the drying chamber 1 tightly.
  • the wood stacks 2 are arranged in the drying room 1 next to one another and possibly one behind the other, so that the stacking strips 4 extend in the transverse direction of the drying chamber 1 and a sufficiently wide space 6 remains free between the two side walls 5 of the drying chamber and the wood stacks 2.
  • a partition 8 which runs parallel to the upper boundary wall 7 and which extends over the entire depth of the drying chamber 1, but ends at a distance from the two side walls 5 which is equal to the width of the rooms 6 is.
  • the partition 8 separates from the stack 2 receiving part of the drying chamber 1 from a flow channel 9, which is connected at both ends to the rooms 6 and in the exemplary embodiment evenly distributed over the depth of the drying room 1 contains two axial fans 10, which by one vertical axis 10 'are adjustable. One not shown If necessary, the adjustment motor effects the adjustment.
  • a heating register 11 is arranged in the longitudinal direction of the flow duct 9 at a distance from the axial fans 10.
  • Supply and exhaust air flaps 12 in the upper boundary wall 7 of the drying chamber 1 enable air to enter and exit to reduce the air humidity. Of course, the air can also be conditioned using a dehumidifier.
  • adjustable air guiding surfaces 13 are arranged in the two upper corner areas of the drying chamber 1, in which the rooms 6 connect to the two ends of the flow channel 9 and in which the air is deflected by 90 °. These air guiding surfaces 13 have a rectangular shape and are curved in the transverse direction in such a way that they form a channel open towards the interior of the drying chamber 1.
  • Each air guide surface 13, which consists for example of an aluminum sheet, is supported by a horizontally arranged axis, to which the longitudinal sides of the air guide surfaces 13 run parallel. The adjustment of the air guide surfaces 13 about this axis is carried out by means of an electric servomotor 14 each. As shown in FIG.
  • the arrangement of the air guide surfaces 13 is selected such that they are in the space between the end of the partition 8 and that of the upper boundary wall 7 and
  • the side wall 5 formed corner are arranged and have differently sized distances from the end of the partition 8, which carries on the side facing the flow channel 9 a flow guide body 15 on its opposite end a flowlet body 15 'of the same design.
  • Additional air guiding surfaces 16 which each consist of a flat, rectangular sheet-metal strip in the exemplary embodiment, are, as shown in FIG. 1, arranged in both rooms 6 at different heights above the floor, with distances from the side wall 5 which increase towards the top.
  • These air baffles 16 are each carried by a horizontal shaft, to which the long sides of the air baffles 16 run parallel.
  • These rotatably mounted shafts are each coupled to an electric servomotor 17.
  • the air guiding surfaces 13 and 16 do not extend over their entire depth because of the great depth of the drying chamber 1. Rather, two identical air guiding surfaces, each with its own servomotor, are arranged side by side in order to be able to influence the air flow differently via the chamber depth.
  • Spray nozzles 18 on the side walls 5 of the drying chamber 1 enable the air to be humidified.
  • moisture sensors 19 are connected via connecting lines (not shown) to an electronic control circuit 20 which is arranged outside the drying chamber 1 in the exemplary embodiment and from which the entire control takes place. Therefore, not only a converter 21 is connected to the control circuit 20, by means of which the speed of the drive motors of the axial fans 10 can be set continuously and the direction of rotation can be predetermined.
  • the control circuit 20 also controls the spray nozzles 18 and the servomotors 14 and 17 as well as the heating register 11 and the motors (not shown) for adjusting the swivel position of the axial fans 10.
  • the control circuit 20 determines the optimal air velocity of the air flows between the individual sawn timber layers. Accordingly, the position of the air guide surfaces 13 and 16 is predetermined and the speed of the axial fans 10 is determined. On the basis of the measured values supplied by the moisture sensors 19, the air speed is kept at a predetermined setpoint according to a program, possibly by adjusting the air guide surfaces 13 and / or 16 and changing the speed of the axial fans 10 and / or their swivel position. This program can also include a flow reversal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Claims (11)

  1. Procédé pour sécher des bois de sciage empilés dans une chambre de séchage avec interposition de baguettes ou de cales d'espacement, au moyen d'un courant d'air passant à travers les couches de bois, la disposition faisant qu'un courant d'air, produit par, au moins un ventilateur, est dirigé successivement sur différentes parties du plan d'entrée de l'empilement, caractérisé en ce que, dans chaque région partielle ou dans chaque zone du plan d'entrée de la pile, on règle la concentration de l'air, indépendamment des autres zones.
  2. Procédé selon la revendication 1, caractérisé en ce qu'on ajuste la concentration du courant d'air de chaque région partielle ou dans chaque zone en fonction des résultats de mesures d'humidité du bois et/ou des gradients d'humidité de celui-ci.
  3. Procédé selon la revendication 2, caractérisé en ce qu'on mesure la partie de la pile appartenant à chaque région partielle du plan d'entrée de l'empilement en, au moins, deux points.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'on détermine, en outre, la vitesse de l'air à, au moins, un point voisin du point de mesure de l'humidité du bois et/ou du point de mesure du gradient d'humidité et on en tient compte pour régler la concentration de l'air.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'on règle la durée de la concentration de l'air dans une ou dans plusieurs régions partielles du plan d'entrée de la pile, en fonction de l'humidité et/ou du gradient d'humidité du bois dans la région partielle correspondante.
  6. Dispositif de séchage pour la mise en oeuvre du procédé selon la revendication 1 comprenant une chambre de séchage (6), au moins un ventilateur (10) pour produire un courant d'air entre les couches de bois de sciage (3) et un dispositif d'orientation de courant (13, 14, 15, 16, 17) comportant, au moins des éléments de direction de courant montés à rotation autour d'un axe (13, 16), caractérisé en ce que les éléments de déviation de courant individuels (13, 16) sont réglables indépendamment l'un de l'autre.
  7. Dispositif de séchage selon la revendication 6, caractérisé en ce que, au moins, deux capteurs (19) pour mesurer l'humidité du bois, son gradient d'humidité et/ou la vitesse de circulation de l'air sont montés, à une certaine distance l'un de l'autre, dans le voisinage de la ou des piles de bois (2) et en ce que les éléments de déviation de courant (13, 16) sont réglables en fonction des grandeurs obtenues au moyen des capteurs (19).
  8. Dispositif de séchage selon la revendication 6 ou 7, caractérisé en ce que des surfaces d'orientation de l'air (16) formées par des éléments d'orientation de courant sont montées à différentes hauteurs sur les côtés d'entrée et/ou de sortie de l'air de la pile de bois de sciage (2).
  9. Dispositif selon la revendication 8, caractérisé en ce que les surfaces de guidage d'air (16) sont montées réglables en hauteur.
  10. Dispositif de séchage selon l'une quelconque des revendications 6 à 9, caractérisé en ce que chaque élément de guidage de courant (13, 16) comporte un moteur de réglage (14, 17).
  11. Dispositif de séchage selon l'une quelconque des revendications 6 à 8, caractérisé en ce qu'un dispositif du ventilateur (10), de préférence réglable au moyen d'un moteur, est logé dans un canal de circulation (9) séparé de la chambre de séchage (6).
EP19880106746 1987-05-26 1988-04-27 Dispositif pour sécher du bois de sciage Revoked EP0292717B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88106746T ATE91776T1 (de) 1987-05-26 1988-04-27 Vorrichtung zum trocknen von schnittholz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873717659 DE3717659A1 (de) 1987-05-26 1987-05-26 Verfahren und vorrichtung zum trocknen von schnittholz
DE3717659 1987-05-26

Publications (3)

Publication Number Publication Date
EP0292717A2 EP0292717A2 (fr) 1988-11-30
EP0292717A3 EP0292717A3 (fr) 1991-04-17
EP0292717B1 true EP0292717B1 (fr) 1993-07-21

Family

ID=6328410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880106746 Revoked EP0292717B1 (fr) 1987-05-26 1988-04-27 Dispositif pour sécher du bois de sciage

Country Status (6)

Country Link
US (1) US4862599A (fr)
EP (1) EP0292717B1 (fr)
AT (1) ATE91776T1 (fr)
CA (1) CA1337153C (fr)
DE (2) DE3717659A1 (fr)
ES (1) ES2041729T3 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005030501B4 (de) * 2005-06-28 2009-10-29 Brunner, Reinhard, Dipl.-Ing. Trocknungsvorrichtung, insbesondere zum Trocknen von Schnittholz
DE102008045829A1 (de) 2008-09-05 2010-03-11 Brunner, Reinhard, Dipl.-Ing. Trocknungsvorrichtung
DE102009014853A1 (de) 2009-03-30 2010-10-07 Brunner, Reinhard, Dipl.-Ing. Trocknungsvorrichtung
WO2011018150A2 (fr) 2009-08-14 2011-02-17 Reinhard Brunner Procédé de séchage de matériau à sécher
DE102010054493A1 (de) 2010-12-14 2012-06-14 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
DE102015110750A1 (de) 2014-07-07 2016-01-07 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
EP3190370A1 (fr) 2016-01-05 2017-07-12 Hildebrand Holztechnik GmbH Dispositif de séchage
DE102022120887A1 (de) 2022-05-03 2023-11-09 Reinhard Brunner Kanal-Trocknungsvorrichtung
DE102022130433A1 (de) 2022-05-09 2023-11-09 Reinhard Brunner Kanal-Trocknungsvorrichtung
WO2023213683A1 (fr) 2022-05-03 2023-11-09 Reinhard Brunner Dispositif de séchage en continu
EP4276398A1 (fr) 2022-05-09 2023-11-15 Reinhard Brunner Dispositif de séchage de canal

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CN1936534B (zh) * 2005-12-31 2010-08-25 天津开发区利达科技发展有限公司 岩样干燥设备及其干燥箱构造
DE102006053274A1 (de) * 2006-11-06 2008-05-08 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Ermitteln der Ladungsmenge in einem Wäschetrockner und Wäschetrockner
US8201501B2 (en) 2009-09-04 2012-06-19 Tinsley Douglas M Dual path kiln improvement
US10619921B2 (en) 2018-01-29 2020-04-14 Norev Dpk, Llc Dual path kiln and method of operating a dual path kiln to continuously dry lumber

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IT1071276B (it) * 1976-05-12 1985-04-02 Pagnozzi Ernesto Guglielmo Perfezionamenti nei procedimenti e negli impianti di essiccazione del legname..particolarmente negli impianti che impiegano il vuoto
US4356641A (en) * 1980-12-15 1982-11-02 Armstrong World Industries Kiln control system
DE3340489A1 (de) * 1983-11-09 1985-08-14 Lignomat GmbH, 7148 Remseck Verfahren zum trocknen von schnittholz

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005030501B4 (de) * 2005-06-28 2009-10-29 Brunner, Reinhard, Dipl.-Ing. Trocknungsvorrichtung, insbesondere zum Trocknen von Schnittholz
DE102008045829A1 (de) 2008-09-05 2010-03-11 Brunner, Reinhard, Dipl.-Ing. Trocknungsvorrichtung
DE102009014853A1 (de) 2009-03-30 2010-10-07 Brunner, Reinhard, Dipl.-Ing. Trocknungsvorrichtung
WO2011018150A2 (fr) 2009-08-14 2011-02-17 Reinhard Brunner Procédé de séchage de matériau à sécher
DE102009037337A1 (de) 2009-08-14 2011-08-04 Brunner, Reinhard, Dipl.-Ing., 30989 Verfahren zum Trocknen von zu trocknendem Gut
DE102010054493B4 (de) * 2010-12-14 2017-06-01 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
DE102010054493A1 (de) 2010-12-14 2012-06-14 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
EP2466238A2 (fr) 2010-12-14 2012-06-20 Hildebrand Holztechnik GmbH Dispositif de séchage
EP2466238A3 (fr) * 2010-12-14 2014-11-26 Hildebrand Holztechnik GmbH Dispositif de séchage
DE102015110750A1 (de) 2014-07-07 2016-01-07 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
EP2966389A1 (fr) 2014-07-07 2016-01-13 Hildebrand Holztechnik GmbH Dispositif de sechage
DE102015110750B4 (de) 2014-07-07 2021-12-09 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
EP3190370A1 (fr) 2016-01-05 2017-07-12 Hildebrand Holztechnik GmbH Dispositif de séchage
DE102022120887A1 (de) 2022-05-03 2023-11-09 Reinhard Brunner Kanal-Trocknungsvorrichtung
WO2023213683A1 (fr) 2022-05-03 2023-11-09 Reinhard Brunner Dispositif de séchage en continu
DE102022120887B4 (de) 2022-05-03 2025-01-02 Reinhard Brunner Kanal-Trocknungsvorrichtung
DE102022130433A1 (de) 2022-05-09 2023-11-09 Reinhard Brunner Kanal-Trocknungsvorrichtung
EP4276398A1 (fr) 2022-05-09 2023-11-15 Reinhard Brunner Dispositif de séchage de canal
DE102022130433B4 (de) 2022-05-09 2024-09-05 Reinhard Brunner Kanal-Trocknungsvorrichtung

Also Published As

Publication number Publication date
EP0292717A2 (fr) 1988-11-30
EP0292717A3 (fr) 1991-04-17
US4862599A (en) 1989-09-05
DE3717659C2 (fr) 1990-03-08
DE3717659A1 (de) 1988-12-15
ATE91776T1 (de) 1993-08-15
ES2041729T3 (es) 1993-12-01
DE3882436D1 (de) 1993-08-26
CA1337153C (fr) 1995-10-03

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