WO1989007694A1 - Procede de traitement de structures de batiment infectees par des organismes nuisibles, notamment par la pourriture seche - Google Patents

Procede de traitement de structures de batiment infectees par des organismes nuisibles, notamment par la pourriture seche Download PDF

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Publication number
WO1989007694A1
WO1989007694A1 PCT/DK1989/000033 DK8900033W WO8907694A1 WO 1989007694 A1 WO1989007694 A1 WO 1989007694A1 DK 8900033 W DK8900033 W DK 8900033W WO 8907694 A1 WO8907694 A1 WO 8907694A1
Authority
WO
WIPO (PCT)
Prior art keywords
treatment
infected
building
reflector
area
Prior art date
Application number
PCT/DK1989/000033
Other languages
English (en)
Inventor
Claus Andersen
Original Assignee
Winterthur-Borgen A/S
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 Winterthur-Borgen A/S filed Critical Winterthur-Borgen A/S
Publication of WO1989007694A1 publication Critical patent/WO1989007694A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/24—Arrangements connected with buildings, doors, windows, or the like
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/22—Killing insects by electric means
    • A01M1/226—Killing insects by electric means by using waves, fields or rays, e.g. sound waves, microwaves, electric waves, magnetic fields, light rays
    • 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
    • E04B1/72—Pest control
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M2200/00—Kind of animal
    • A01M2200/01—Insects
    • A01M2200/011—Crawling insects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00—Purpose of the treatment
    • B27K2240/20—Removing fungi, molds or insects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
    • B27K5/0055—Radio-waves, e.g. microwaves

Definitions

  • the present invention relates to a method for de ⁇ structive treatment of harmful organisms, in particular dry rot, or insects in building structures, which are infected by such organisms comprising heating of the structure to a temperature exceeding the maximum survival temperature of the organism.
  • the heating is provided by means of an oil- or gasfired heater blowing heated air into the tent enclosing the building for a period of several days. It is also known to sterilize smaller items such as hermetic packages of food by heating the complete package to a suitable pasteurizing temperature. In that connection it is known to at least partly provide the heating by means of microwawes, the package being conveyed through a closed chamber or a tunnel, in which a microwawe field sufficiently large entirely surround the package is present. Examples of such sterilisation metods are described in the European patent specification no. 152 023 and in DE-AS 20 29 792 and DE-OS 33 41 585.
  • the object of the present invention is to provide a method likewise based on heating of the building structure to a temperature exceeding the survival temperature of the harmful organisms, but which heating may be reduced to a local treatment of the infected area, whereby the building is not useless for its normal purpose during longer periods.
  • this object is attained by a method according to the characterizing clause of claim 1.
  • the invention is based on the perception that my ⁇ celium and the like, which have not been destroyed by a tra ⁇ ditional treatment, often will be present in the masonry of a building structure, and that for wooden structures ef ⁇ fective chemical preparations for the prevention of fresh outbreaks in a treated construction are available.
  • the method is particuarly suited for a deep treatment of masonry, but as the spreading of the organisms is com ⁇ paratively slow, the treatment may take place successively area by area, until all the infected portions of the building plus a security zone around this area have been treated.
  • a property in microwawes is that they heat the ma ⁇ terials from inside, so the treated structures will obtain a heating through its thickness.
  • the distance from the transmitter, in which harmful radiation takes place will be comparatively short, so that excessive safety precautions need not be taken apart from a safety zone of a few meters around the microwawe unit.
  • Microwawes are therefore well suited for local treatment of building structures as an effective heating in depth may be obtained in the structure, and because only moderate safety requirements will be sufficient to avoid any health risk for the operating personel.
  • Microwaves in a concentrated field are especially harmful to organisms containing water and proteins, which may coagulate, and heating of the structure to a temperature exceeding the survival temperature, will therefore provide a safety margin, as the living cells are considered to be sen- sitive to microwaves.
  • the opposite side of the structure is covered by a reflector comprising metal sheets, metallized textiles or plastic foils.
  • a reflector comprising metal sheets, metallized textiles or plastic foils.
  • the use of re ⁇ flectors also results in an intensivation of the treatment in the area between the microwave transmitter and the re ⁇ flector.
  • the method may, therefore, be used safely without any other safety measures than a safety zone of a few metres around the applied microwave transmitter.
  • the invention also relates to an apparatus to be used with the method.
  • the apparatus is defined in claims 7.
  • Fig. 1 shows an apparatus for treatment of building structures placed on an outer wall of a building
  • fig. 2 shows a modification of the apparatus for treatment of rectangular corners.
  • the object of the method according to the invention is to kill harmful organisms in buildng structures.
  • a microwave transmitter is used, said transmitter being directed successively towards the different parts of an infected building, until all parts have in a period of time been heated to a temperature ex ⁇ ceeding the survival temperature limit of the organisms.
  • the method is particuarly aiming at killing mycelium of dry rot (serpula lacrymans or merulius lacrymans), but may also be used for fighting for example insects having their nest or the larvae of which live in building structures, and an important feature of the method is that the strength of the structure is not influenced by the treatment.
  • an apparatus 1 is used for per ⁇ forming the method, said apparatus comprising for example a standardized microwave transmitter 2, which is mounted on the rear wall of a shield and a reflector 3, which protects the antenna of the microwave transmitter, reduces the amount of strolling radiation and directs the radiation against the part 4 of the building to be exposed.
  • the reflector 3 is de ⁇ signed to provide a substantially homogeneous field of radi- ation passing into the building part.
  • the building structure is a wooden outer wall of a one-familiy house. In the drawing a door is shown too. Behind the wall a reflector 5 in the shape of a metal sheet or a metallized textile or plastics foil may advantageously be placed.
  • the reflector 5 prevents on one hand undesired radiation into the house, which may prevent the rooms from being used during the treatment, and intensifies on the other hand the treatment in the area between apparatus and reflector.
  • the apparatus is supported by means of a stand 6 resting on a base 7.
  • the stand is designed to allow lifting and lowering oaf the ap ⁇ paratus for treatment by stages of a smaller or larger part of the building.
  • the time of exposure is determined either by experiments or by measurements currently being made during the exposure with microwaves. It is possible in a part of a structure, which is to be exposed to microwaves, to make a number of bores, into which a thermometer is in ⁇ serted, said thermometer being adapted to measuring the re- levant influence on temperature.
  • An alcohol thermometer may be used for insertion into the bores. It is also possible to insert sensor, which measure the elctromagnetic radiation directly. Such measurements may be made by means of suitable elctronic instruments, but may also be made by means of a heat-insulated alcohol thermometer, by means of which the increase in temperature per unit of time is measured. The exposure is continued until the maximum survival temperature is exceeded for a short period of time.
  • the apparatus shown in fig. 1 is especially adapted to exposure of structures having a plane surface.
  • fig. 2 an alternative is shown, which is adapted to exposure of structures forming a right-angled corner.
  • the reflector 3 is removably connected with an adaptor 7 forming a tight fit to the building structure and forming a shield against scattered radiation.
  • the adaptor may be a removable element, which is connected to the reflector of the appa ⁇ ratus by means of releasable mountings 8.
  • a single type of microwave transmitters may be adapted to special tasks of exposure in a simple way, and correspondingly the rsik of harmful radiation of the opera ⁇ ting personel will be minimized.
  • Tests have been made with an apparatus corresponding to fig. 1 and comprising a transmitter for radiation of mi ⁇ crowaves with a frequency of 2450 MHz and an effect of about 1500 W. With such an effect it is possible to heat masonry with a thickness of 23 cm to temperatures exceeding the tem ⁇ perature of the surroundings with 20°C or more.
  • Experiments with 4 glass ampoules containing probes of mycelium of dry rot has proved that by exposure of 10 minutes' duration in two cases and 20 minutes in two other ones, in which cases the tempereature rose from 35°C to 36°C and 37°C, re ⁇ spectively, cultivation of the probes did not show any sign of growth.
  • a safety distance for the operator during exposure should for example be 2 metres in order to be safe for shorter periods and somewhat more for longer stays.
  • Wages for the above treatment is considered to be less than DKK 10,000, while the costs of traditional repair comprising renewal of in ⁇ fected parts of the building including temporary support of the trusses will exceed DKK 50,000.
  • the house is normally inhabitable, which entails ad ⁇ ditional costs for hotel accomodation, etc.
  • a special characteristic of dry rot is that it cannot live without access to certain metal ions, on which the fungus is able to thrive on account of the abundant supply thereof in traditional building structures, said ions being used by the fungus for formation of insoluble oxalates. Part of the mycelium, therefore, will stretch into the masonry of the house, where it is difficult to trace and to destroy by traditional means.
  • the method according to the invention is particularly suited for sterilizing masonry owing to the ability of microwaves to pass through such materials. As the living organisms contain water, they will be heated to a temperature level, which is at least as high as the surrounding masonry or concrete, which gives an extra security that a destruction has taken place if the maximum survival temperature has been exceeded.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Insects & Arthropods (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Catching Or Destruction (AREA)

Abstract

Le procédé de traitement décrit sert à détruire des organismes nuisibles, tels que notamment la pourriture sèche, ou des insectes, par échauffement de la structure à une température dépassant la température maximum de survie des organismes. Afin d'assurer une destruction efficace des organismes par ce traitement, qui est restreint à la région infectée et à une zone de sécurité entourant cette région et qui est relativement rapide et peut être effectué avec un minimum d'influence sur la structure et un minimum d'inconvénients aux utilisateurs du bâtiment pendant le traitement, on effectue l'échauffement au moyen de micro-ondes, auxquelles les parties infectées de la structure de bâtiment infectée sont successivement exposées jusqu'à ce que toutes les régions soient traitées. L'échauffement est effectué au moyen d'un appareil comprenant au moins une antenne à micro-ondes (2) entourée par un réflecteur (34) dont la forme est conçue pour qu'il délimite une région d'une structure de bâtiment à l'intérieur de laquelle l'effet des micro-ondes émises est sensiblement uniforme.
PCT/DK1989/000033 1988-02-19 1989-02-16 Procede de traitement de structures de batiment infectees par des organismes nuisibles, notamment par la pourriture seche WO1989007694A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK868/88 1988-02-19
DK86888A DK86888A (da) 1988-02-19 1988-02-19 Fremgangsmaade ved behandling af bygningskonstruktioner, der er inficeret med skadelige organismer, til uskadeliggoerelse af disse

Publications (1)

Publication Number Publication Date
WO1989007694A1 true WO1989007694A1 (fr) 1989-08-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1989/000033 WO1989007694A1 (fr) 1988-02-19 1989-02-16 Procede de traitement de structures de batiment infectees par des organismes nuisibles, notamment par la pourriture seche

Country Status (2)

Country Link
DK (1) DK86888A (fr)
WO (1) WO1989007694A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9300472A (nl) * 1993-03-17 1994-10-17 Wilhelm Johannes Boks Bestrijden van ongedierte met microgolfenergie.
WO1997021060A1 (fr) * 1995-12-01 1997-06-12 Detlef Steinbach Procede et dispositif de dessiccation de batiments et/ou de composants fixes
EP0967841A3 (fr) * 1998-06-25 2000-05-03 Elmatec Oy Dispositif potable de séchage utilisant des micro-ondes
FR2836009A1 (fr) * 2002-02-18 2003-08-22 Roger Legrand Dispositif micro ondes anti xylophages

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370534A (en) * 1979-04-09 1983-01-25 Deryck Brandon Apparatus and method for heating, thawing and/or demoisturizing materials and/or objects
DE3405009A1 (de) * 1984-02-13 1985-08-14 Manfred 6251 Hünfelden Simmberg Verfahren und anordnung zur bekaempfung von im holz lebenden, tierischen schaedlingen
WO1987001551A1 (fr) * 1985-08-29 1987-03-12 Klaila, William, J. Procede et appareil de reduction de la viscosite de materiaux tres visqueux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370534A (en) * 1979-04-09 1983-01-25 Deryck Brandon Apparatus and method for heating, thawing and/or demoisturizing materials and/or objects
DE3405009A1 (de) * 1984-02-13 1985-08-14 Manfred 6251 Hünfelden Simmberg Verfahren und anordnung zur bekaempfung von im holz lebenden, tierischen schaedlingen
WO1987001551A1 (fr) * 1985-08-29 1987-03-12 Klaila, William, J. Procede et appareil de reduction de la viscosite de materiaux tres visqueux

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9300472A (nl) * 1993-03-17 1994-10-17 Wilhelm Johannes Boks Bestrijden van ongedierte met microgolfenergie.
WO1997021060A1 (fr) * 1995-12-01 1997-06-12 Detlef Steinbach Procede et dispositif de dessiccation de batiments et/ou de composants fixes
EP0967841A3 (fr) * 1998-06-25 2000-05-03 Elmatec Oy Dispositif potable de séchage utilisant des micro-ondes
FR2836009A1 (fr) * 2002-02-18 2003-08-22 Roger Legrand Dispositif micro ondes anti xylophages

Also Published As

Publication number Publication date
DK86888A (da) 1989-08-20
DK86888D0 (da) 1988-02-19

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