EP1470299A1 - Method and system for drying a wall - Google Patents
Method and system for drying a wallInfo
- Publication number
- EP1470299A1 EP1470299A1 EP03706249A EP03706249A EP1470299A1 EP 1470299 A1 EP1470299 A1 EP 1470299A1 EP 03706249 A EP03706249 A EP 03706249A EP 03706249 A EP03706249 A EP 03706249A EP 1470299 A1 EP1470299 A1 EP 1470299A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- voltage
- electrodes
- arrangement according
- pulse
- 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.)
- Granted
Links
Classifications
-
- 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
- E04B1/7007—Drying or keeping dry, e.g. by air vents by using electricity, e.g. electro-osmosis
Definitions
- the invention relates to a method and an arrangement for dehumidifying a wall, in particular a masonry of buildings.
- Methods are known for dehumidifying masonry in which suitable electric fields or electromagnetic radiation are generated and directed onto the masonry. These methods take advantage of the fact that electrical or electromagnetic fields have an influence on the moisture in the masonry and can be used to dehumidify the masonry if used appropriately.
- electroosmotic methods are known in particular, in which an electric field is applied between masonry electrodes installed in the masonry and floor electrodes embedded in the earth or in the floor area. Ions dissolved in the moisture are drawn to the respective electrodes by the electric field, the water molecules following the concentration gradient of the ions and thus being able to be accumulated in the area of the bottom electrodes.
- a disadvantage of conventional electro-osmosis processes is that, as a rule, residual moisture in the masonry, in particular in a lower base area, cannot be removed. Extensive dehumidification of the masonry is very time-consuming, as a rule a large number of electrodes must be provided in the walls and the floor area, which in some cases leads to considerable structural interventions in the masonry. Furthermore, the concentration accumulations of lo- usually lead to efflorescence in the masonry, which leads to aesthetic and qualitative impairments.
- EP 0 395 085 B1 shows a method of this type in which electromagnetic radiation generated by an electromagnetic resonator and emitted by a radiation device is directed onto the masonry, the resonator being excited to generate the electromagnetic radiation with periodic electrical pulses of a pulse train frequency, which is less than the natural oscillation frequency of the resonator.
- the frequency of the emitted electromagnetic radiation is in the range around 150 kHz.
- the invention has for its object to provide a method and an arrangement for dehumidifying a wall, in particular masonry, which ensure a relatively quick and high dehumidification of the wall with relatively little effort.
- a wall in particular masonry
- an inexpensive application in a small part of the wall should advantageously enable rapid and safe dehumidification.
- the wall can in particular be a masonry of a building, e.g. B. from masonry, concrete or similar material. Furthermore, the wall can in principle also from z. B. wood or a wood product.
- the wall can include vertical wall areas as well as ceiling and floor areas.
- a DC voltage is therefore superimposed with an at least temporarily applied pulse voltage.
- the direct voltage enables a spatial concentration of the ions dissolved in the moisture, which draw the moisture with them, in accordance with the principle of electroosmosis known per se. Due to the reverse polarity of the pulse voltage, a depletion of the water molecules enriched with ions or conductive minerals and acids is achieved according to the invention, which largely prevents the above-described disadvantages of conventional electroosmosis processes.
- the moisture transport due to the ion concentration is not impaired by the brief voltage impulses, so that a quick and safe dehumidification is possible.
- the flow potential or zeta potential is influenced in favor of the dehumidification process.
- two bottom electrodes are provided, which are alternately connected to the pole of the voltage source, which can be achieved, for example, by means of a suitable relay in a control device.
- the alternating connection can be made both with the total voltage composed of DC voltage and pulse voltage and only with the DC voltage or the pulse voltage. The alternating connection enables a more even accumulation of moisture in a larger section of the floor area.
- the bottom electrodes can in particular have different lengths and / or can be inserted or attached at different depths.
- the electrodes can advantageously be designed as rods or rods insulated in a shaft area, the electrode ends of which are exposed within the masonry or the floor area. This achieves a uniform formation of the electric field within the masonry and the floor area, so that the formation of currents along the surface, which leads to less moisture removal in the masonry and to a greater blooming on the surface, is kept low.
- the electrodes can e.g. B. a metal such as aluminum or stainless steel or advantageously a conductive plastic, e.g. B. a plastic material with graphite inclusions, to avoid corrosion and self-consumption of the electrodes.
- the wall electrodes are advantageously arranged vertically one above the other in a line, which enables rapid removal of moisture in the vertical direction.
- a wall electrode with a negative pole connection can also be arranged vertically below the vertical wall area, as a result of which the vertical transport of moisture from the masonry can be improved.
- FIG. 1 shows a cross section through a masonry of a first embodiment with an arrangement according to the invention
- Figure 2 shows a cross section through a masonry of a further embodiment with an arrangement according to the invention
- FIG. 3 is a block diagram of an embodiment of a control device according to the invention.
- a control device 1 is attached to a masonry 2, which is formed above a floor area 4 or earth area.
- the floor area 4 is delimited at the top by a lower edge 5 of the building, for example the lower edge of the basement or a floor slab.
- Moisture is contained in the masonry, in particular moisture due to a new building, new plastering or also due to rising groundwater, backwater or leachate.
- holes are formed in a vertical line one above the other, which extend from the surface of the masonry in a horizontal direction and vertically to the surface.
- 15 cm long masonry electrodes 7, 8 and 9 are introduced into the holes.
- Each masonry electrode is made of a conductive material, for example a metal such as aluminum or stainless steel or advantageously a conductive plastic, and is surrounded in a shaft area with insulation 16, for example a shrink tube, so that only one electrode end 18 is exposed in the masonry 2.
- Another masonry electrode 12 constructed in the same way is inserted vertically under the other masonry electrodes 7, 8, 9 at the lower end of the masonry 2 at an oblique angle into the floor area 4.
- bottom electrodes 13, 14 In the bottom area 4 below and to the side of the masonry 2 are bottom electrodes 13, 14 vertically from above at different distances brought to masonry 2.
- the two bottom electrodes 13, 14 are constructed in accordance with the masonry electrodes 7, 8, 9, 12 described above and have a different length or different shaft length, so that their electrode ends 18 are exposed to a different depth under the lower edge 5.
- the masonry electrodes 7, 8, 9, 12 are connected via lines 20 to a negative pole 28 or a cathode of a DC voltage source of 20 volts of the control device 1.
- the bottom electrodes 13, 14 are connected via separate lines 21 to a positive pole 25 and 26 of the DC voltage source of the control device 1, alternatively the pole 25 or the pole 26 can be connected via a relay 23 to an anode of the DC voltage source of the control device 1.
- the switching of the relay 23 is carried out by appropriate programming of the control device 1.
- a pulse voltage source is connected in parallel to the DC voltage source in the control device 1, which is polarized in reverse to the DC voltage source and thus the DC voltage source with inverse pulses with peak voltages of 1.5 to 3 V and Current pulses with a pulse duration of 0.2 to 2 s with a pause ratio DUTY of, for example, 25% to 80% are generated.
- a total voltage is applied between a bottom electrode 13, 14 and the masonry electrodes 7, 8, 9, 12 connected in parallel, which results as a superimposition of the DC voltage and the reverse-polarized pulse voltage.
- the switching of the relay 23 and the pulse voltage source can be controlled on the one hand according to a predetermined program of the control device 1. This can take place, for example, after measuring an initial moisture content of the masonry and depending on the size of the masonry or the total moisture contained in the masonry 2.
- the control device 1 can be operated with the usual mains voltage of 220 to 230 volts AC. A maximum output current of approx. 300 mA can be selected.
- a plurality of moisture sensors 29 are provided in the masonry 2 at different positions of the masonry 2, which measure the moisture of the masonry 2 at their respective positions and moisture signals S1 via lines 30 to the control device 1 transfer; in principle, only one sensor 29 can also be provided.
- the control of the level of the DC voltage and / or the relay 23 and / or the pulse voltage source takes place as a function of the moisture signals output by the sensors 29.
- the control device 1 compares the moisture signals S1 with predetermined values and decides whether a drying process is to be ended.
- the method according to the invention can be terminated completely or advantageously a part of the electrodes, e.g. B. the bottom electrode 14 and possibly one or more wall electrodes can be switched as a limiting electrode with a lower limiting current compared to the drying mode, in order to keep the dried state.
- the moisture signals S1 are received by an interface 32 and moisture signals S2 to a computing device 37 - e.g. B. a microprocessor or microcomputer - output.
- the moisture signals S1 can also be output directly to the calculation device 37.
- the calculation device 37 also receives a time signal S5 from a clock 38 and a memory signal S4 from a data memory 40, preferably the calculation device 37 also stores memory signals S4 therein.
- a current converter 36 receives an alternating current AC from an external power supply via input connections 33 and outputs the above-mentioned direct and pulse voltage.
- the calculation device 37 also outputs then switching signals S6 to a relay 34 for optionally outputting the voltages to the positive poles 25, 26 and preferably also a current control signal to the current transformer 36 for setting the drying mode with a higher current or a limiting mode with a lower limiting current to keep an already dried wall dry, if necessary also for switching off the current transformer 36.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Electrochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Drying Of Gases (AREA)
- Building Environments (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200331000T SI1470299T1 (en) | 2002-01-25 | 2003-01-27 | Method and system for drying a wall |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10202764A DE10202764A1 (en) | 2002-01-25 | 2002-01-25 | Method and arrangement for dehumidifying masonry |
DE10202764 | 2002-01-25 | ||
PCT/DE2003/000207 WO2003062546A1 (en) | 2002-01-25 | 2003-01-27 | Method and system for drying a wall |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1470299A1 true EP1470299A1 (en) | 2004-10-27 |
EP1470299B1 EP1470299B1 (en) | 2007-08-01 |
Family
ID=7713002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03706249A Expired - Lifetime EP1470299B1 (en) | 2002-01-25 | 2003-01-27 | Method and system for drying a wall |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1470299B1 (en) |
AT (1) | ATE368777T1 (en) |
DE (2) | DE10202764A1 (en) |
WO (1) | WO2003062546A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005019220A1 (en) * | 2005-04-22 | 2006-10-26 | Egbert Nensel | Electrical osmosis method for carrying out electrical osmosis in draining masonry/buildings applies a pulsed electrical voltage to electrodes in masonry/buildings and their surroundings |
FR2912667B1 (en) * | 2007-02-20 | 2011-07-29 | Philippe Chateau | DEVICE FOR DRAINING A POROUS MEDIUM WITH MEMORIZATION AND OPERATING CONTROL |
DE102008042128B4 (en) * | 2008-09-16 | 2014-03-27 | Werner Büsch | Method and device in particular for drying masonry |
GB0918940D0 (en) * | 2009-10-28 | 2009-12-16 | Norsk Inst For Skog Og Landska | Method |
DE102015208204A1 (en) * | 2015-05-04 | 2016-11-10 | Schunk Wien Gesellschaft M.B.H. | Process for drying a building material body |
IT202100005570A1 (en) | 2021-03-10 | 2022-09-10 | Leonardo Solutions S R L | EQUIPMENT FOR NEUTRALIZING THE CAPILLARY RISING OF HUMIDITY IN A MASONRY IN A CONTROLLED WAY |
CN114892835B (en) * | 2022-05-19 | 2023-09-15 | 长沙同强电子科技有限公司 | Electrode multipoint layout system of electroosmosis pulse anti-seepage dehumidification system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH497614A (en) * | 1969-03-25 | 1970-10-15 | Technik Und Commerz Trust Reg | Method and device for dehumidifying buildings |
DE2649611C3 (en) * | 1976-10-29 | 1983-12-29 | Institutul De Cercetari In Constructii Si Economia Constructiilor - Incerc, Bucuresti | Method and device for dehumidifying buildings and avoiding humidification or re-humidification |
US5015351A (en) * | 1989-04-04 | 1991-05-14 | Miller John B | Method for electrochemical treatment of porous building materials, particularly for drying and re-alkalization |
DE8905412U1 (en) | 1989-04-28 | 1989-06-22 | Coufal, Hans-Peter, Wolfhalden | Electronic device for dehumidifying masonry |
AT394409B (en) * | 1989-05-30 | 1992-03-25 | Steininger Karl Heinz | DEVICE FOR ELECTROKINETIC DESALINATION OF WALLMASKS |
AT404270B (en) * | 1992-09-01 | 1998-10-27 | Nogler & Daum Eltac | DEVICE AND METHOD FOR DEHUMIDIFYING CONSTRUCTIONS |
DE19800597A1 (en) * | 1998-01-09 | 1999-07-22 | Hildegard Berger | Device for dehumidifying and / or desalting buildings |
US6117295A (en) * | 1998-04-15 | 2000-09-12 | Drytronic, Inc. | Method for dehydrating a porous material |
DE19944757A1 (en) * | 1998-09-17 | 2000-08-03 | Schramm Technologievertrieb Gm | A method for driving out moisture fro a wall using electrodes and a low voltage electrical supply controlled by a microprocessor to maintain a constant current. |
AT411278B (en) * | 2001-04-20 | 2003-11-25 | Kuno Kerschbaumer | FACILITIES FOR DRYING MASONRY AND FOUNDATIONS |
-
2002
- 2002-01-25 DE DE10202764A patent/DE10202764A1/en not_active Withdrawn
-
2003
- 2003-01-27 AT AT03706249T patent/ATE368777T1/en not_active IP Right Cessation
- 2003-01-27 WO PCT/DE2003/000207 patent/WO2003062546A1/en active IP Right Grant
- 2003-01-27 DE DE50307810T patent/DE50307810D1/en not_active Expired - Fee Related
- 2003-01-27 EP EP03706249A patent/EP1470299B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03062546A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE368777T1 (en) | 2007-08-15 |
DE10202764A1 (en) | 2003-08-07 |
EP1470299B1 (en) | 2007-08-01 |
WO2003062546A1 (en) | 2003-07-31 |
DE50307810D1 (en) | 2007-09-13 |
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