EP1251208A2 - Method and device for the drying of construction elements and the repair of water damage to same - Google Patents

Abstract

Process for dehumidifying and eliminating water damage occurring in buildings, especially in thermal insulating layers (20), comprises inserting under pressure a substance binding water into the wet region of the thermal insulating layer. The substance reacts exothermically during absorption of water. The substance is a granulate or powder which is inserted in a pulsed manner using compressed air into the treated region of the thermal insulation layer and accelerates evaporation of the water. An Independent claim is also included for a device used for carrying out the above process. Preferred Features: The substance is powdered chalk, e.g. calcium hydroxide (16).

Description

The invention relates to a method for dehumidifying structures and elimination of dampened thermal insulation layers Water damage that occurred in the moistened area of the thermal insulation layer the moisture-binding substance introduced under pressure the substance is exothermic when it absorbs moisture responding. The invention further relates to a device to carry out the procedure.

DE 33 37 691 C1 describes a method for dehumidifying of intermediate layers in building constructions, in particular of dampened impact sound and / or thermal insulation layers known in which the moisture-binding substance a liquid starting product, such as a polyurethane foam system, is that under pressure in the wet Layer is introduced and a hardening foam mass forms. The pressed-in starting product also fills in the boreholes worked in and hardened there. The foam mass remaining in the borehole is removed using of a tool and the bore with one Filled in joint material. The disadvantage is that dehumidification very difficult or impossible to touch up if the foam mass has not hardened sufficiently, i.e. if the polyurethane foam system, like two-component system, faulty has been discontinued. It is also removing the Foam mass from the boreholes difficult and time consuming. Furthermore, the insulation layer can be impaired so that it no longer fulfills its task.

The object of the invention is a novel method of to design the type mentioned at the outset no liquid, moisture-binding substance can be and in which a correction of the dehumidifying effect is no longer necessary. Another job the invention is a reduction in drying time.

This object is achieved by the features specified in claim 1 solved.

Suitable as moisture-binding, powdery substances lime or other alkaline earths, for example Hydrated lime with colloidal properties and react strongly exothermic. The lime is also physiologically harmless, affects the properties the insulation layer does not and remains after drying in the powdery state.

This powdery substance, hereinafter referred to as "hydrated lime", can be loose in at least one on the thermal insulation layer incorporated, up to the moist area poured out opening, such as borehole or in packaged form, such as a cartridge, cartridge or pouch, be inserted.

The powder or granules is under the action of at least a pressure wave caused by the pressure pulse, in the moist area of the thermal insulation layer driven in, the pressure wave, or pressure waves give the molecules of the powdery substance a high kinetic energy, which makes it essentially homogeneous be distributed throughout the moist area so that the moisture there can be bound.

The slaked lime is driven through the openings into the moist area under a pressure of up to 10 x 10 ⁵ Pa, preferably up to 5 x 10 ⁵ Pa.

The thermal insulation layer to be treated usually exists laid on a surface such as a layer of concrete Foam sheets, which in turn with a covering, such as screed or tile slabs. The procedure according to the invention is also suitable for other porous or fibrous thermal insulation layers, for example made of Mineral wool.

The openings in the part of the building can be drilled holes or slots that are at least up to the surface the thermal insulation layer. Practically enough the openings down to the surface where the thermal insulation layer rests.

The slaked lime can be poured into a pipe the airtight connected to at least one opening being, between the opening and the portion of the powdery Substance remains an air cushion, so that in the Opening a mixture of the quicklime and the compressed air in a pulse is introduced, which mixture in the moistened Area expanded into. With a pressure pulse the hydrated lime molecules are carried away by the air flow and better distributed. This variant of the procedure is particularly suitable for dehumidifying edge or Base areas where slots are incorporated.

It is particularly advantageous that the impulse-like introduction Repeatedly several times from the hydrated lime to the moist area until a reliable dehumidification effect, if necessary after a subsequent evaporation phase, is detected. Rectifications are also possible.

Another advantage of the pressure pulse method is its particularly high efficiency, since experience has shown that the entire Evaporation time compared to conventional methods about 50% to 65% can be cut. Even the number of Drill holes in relation to the area to be treated has been removed proven to be smaller.

In contrast to the main claim, the quicklime can also continuously using compressed air in the humidified Enter the area and bind the moisture there.

• einem Impuls-Druckluftgerät,
• und wenigstens einer Austrittsdüse, die an jeweilige am Bauwerksteil eingearbeitete Öffnung luftdicht angepaßt ist.

A device for performing the method consists of the following main parts:

• a pulse compressed air device,
• and at least one outlet nozzle which is airtightly adapted to the respective opening made in the structural part.

The pulse compressed air device contains a compressed air gun and one with this integrated compressed air tank, which Compressed air tank preferably with a manually operable Air pump is equipped. The compressed air tank can also be from an external compressor with the compressed air be fed.

The pulse compressed air device can be connected to a compressed air distributor be connected, which in turn via differently managed Compressed air lines with several air outlet nozzles can be connected.

The air outlet nozzles and the compressed air lines can be any - in top view seen the area to be treated - form arrangements, for example a grid or L-shaped arrangement.

The air outlet nozzles are preferably connected Compressed air lines elastic, so that they adhere to the respective Arrangement of boreholes, e.g. at the joints of a tile covering have it adjusted.

• einem Plattenelement mit einer Öffnung,
• einem Rohrstutzen zum Anschluß an ein Luftzuführungsrohr, wie Schlauch, welcher Rohrstutzen mit dem Plattenelement im Bereich der Öffnung verbunden ist,
• einer Dichtung,
• und einem Verankerungselement.

Another injection nozzle can be connected to the pulse compressed air device, which consists of the following main parts:

• a plate element with an opening,
• a pipe socket for connection to an air supply pipe, such as a hose, which pipe socket is connected to the plate element in the region of the opening,
• a seal,
• and an anchoring element.

The anchoring element is in the respective on the floor or dry air inlet opening on the wall above another opening can be inserted in the plate element, so the injection nozzle on the floor or on the wall can be securely fixed.

The plate element is facing away from the pipe socket Provide underside with a circumferential sealing strip.

To ensure a sufficient supply of dry air, it suffices to use the dry air inlet as Slit on the joint between two side by side Arrange tiles. The binding material on the joint as well underlying material layers are simply removed, so that access to the moist area is created becomes.

In this way it is possible to drill into the tile previously drilled Dry air inlet opening can be dispensed with, so that the tile no longer needs to be replaced. The anchoring element can also enter the slit-shaped dry air inlet opening be introduced without the tile damage in any way.

The anchoring element can be designed differently provided that it has a hook and into the slit-shaped dry air inlet opening is so insertable that the hook under the tile plate can intervene.

Here, the anchoring element with a hook opposite fixing element, such as eccentric, wedge or a nut, so that the plate element with sufficient force against the floor or against the tile can be pressed. This force is said to Withstand blowing in pressure.

The pipe socket connected to the opening on the plate element can be a pipe nipple, a pipe bracket or part of a Be T-piece, or be connected to the T-piece.

The dry air inlet openings worked into the building part can be slots or boreholes, at least to the surface of the thermal insulation layer reach there. In practice, the openings reach up to towards the surface on which the thermal insulation layer lies.

Fig. 1a

einen Teilquerschnitt eines Fußbodens mit ersichtlichen Bohrloch und darin untergebrachtem Löschkalk;

Fig. 1b

den Teilquerschnitt gemäß Fig.1 nach der Ausübung eines Druckluftimpulses;

Fig. 2

den Teilquerschnitt gemäß Fig.1 mit einer in das Bohrloch eingelegten Kartusche;

Fig. 3

Unterbringung einer Portion vom Löschkalk in einem an einer Decke gebohrten Sackloch;

Fig. 4

schematisch einen Sockelbereich eines Fußbodens mit einer schlitzförmigen Austrittsdüse;

Fig. 5

ein Detail der Austrittsdüse in einer perspektivischen Ansicht;

Fig. 6

einen Druckluftverteiler mit angeschlossenen Druckluftleitungen; in einer schematischen Draufsicht auf einen Fliesenbelag;

Fig. 7

eine Einblasdüse mit Plattenelement in einer perspektivischen Ansicht, ohne Verankerungselement;

Fig. 8

einen Längsschnitt B-B gemäß Fig. 7;

Fig. 9

einen Querschnitt A-A gemäß Fig. 8 mit einer schematisch angedeuteten schlitzförmigen Trockenluft-Eintrittsöffnung im Bereich der Fliesenfuge und mit einem Verankerungselement;

Fig. 10

eine andere Ausführungsform des Verankerungselementes;

Fig. 11

einen entleerten Fugenabschnitt als TrockenluftEintrittsöffnung in Draufsicht auf einen Fliesenbelag, mit der schematisch gezeigten Einblasdüse mit Plattenelement;

Fig. 12

perspektivisch eine L-förmige Anordnung von Luftaustrittsdüsen;

Fig. 13

ein an ein Bohrloch angeschlossenes Gebläse; und

Fig. 14

Anordnung von Bohrlöchern an einem Fußboden.

The invention is explained in more detail below on the basis of exemplary embodiments. The figures show in detail:

Fig. 1a

a partial cross section of a floor with visible borehole and slaked lime contained therein;

Fig. 1b

the partial cross section of Figure 1 after the application of a compressed air pulse;

Fig. 2

the partial cross section of Figure 1 with a cartridge inserted into the borehole;

Fig. 3

Placing a portion of the hydrated lime in a blind hole drilled on a ceiling;

Fig. 4

schematically a base area of a floor with a slot-shaped outlet nozzle;

Fig. 5

a detail of the outlet nozzle in a perspective view;

Fig. 6

a compressed air distributor with connected compressed air lines; in a schematic plan view of a tile covering;

Fig. 7

a blowing nozzle with plate element in a perspective view, without anchoring element;

Fig. 8

a longitudinal section BB of FIG. 7;

Fig. 9

8 shows a cross section AA according to FIG. 8 with a schematically indicated slot-shaped dry air inlet opening in the area of the tile joint and with an anchoring element;

Fig. 10

another embodiment of the anchoring element;

Fig. 11

an emptied joint section as a dry air inlet opening in plan view of a tile covering, with the injection nozzle with plate element shown schematically;

Fig. 12

in perspective an L-shaped arrangement of air outlet nozzles;

Fig. 13

a blower connected to a borehole; and

Fig. 14

Arrangement of drill holes on a floor.

A device 100 is shown schematically in FIGS. 1a and 1b shown for building dehumidification, which essentially of two main parts, namely a pulse compressed air device 1 and one on a compressed air outlet nozzle 8 of the pulse compressed air device attached rubber-like sealing cone 18 exists.

The pulse compressed air device 1 is autonomous in terms of energy supply, i.e. no external compressed air supply is required.

The device is composed of a cylindrical compressed air tank 23, a manual air pump 24 and a compressed air gun 2. With the hand air pump 24, a required air pressure which is at least 5 x 10 ⁵ Pa can be generated. The schematically indicated compressed air gun 2 comprises a hand lever 12 and a valve (not shown).

The compressed air tank 23 can optionally have a compressed air inlet connection 29 for connection to a compressor (not shown).

The inventive method for dehumidifying structures is explained below with reference to the drawing.

On a floating floor 60 (see. Fig. 1a) by a thermal insulation layer laid on a substrate 17 (concrete layer) 20, a screed layer 21 and one fleece-like floor covering 19 laid thereon several openings 3.1 ... 3.n have been incorporated. The Figure 1a shows only one opening, the borehole from Diameter is about 50 mm and runs up to concrete Underground 17 is enough.

Previously, with the help of measuring and location systems known per se, such as moisture meters and probes, water damage detected. The water damage occurring on the floor 60 are in Fig. 1a as a moistened area 10.1 to recognize. The thermal insulation layer 20 consists of several butt-jointed polystyrene foam sheets.

Fig. 14 shows an arrangement of drilled holes in the floor. On the square floor with an area of approximately 36 m ² , five openings 3.1 ... 3.5 are incorporated, one of which is in the middle and the other four are arranged in the corner areas. The result of this is that, in the present case, an average borehole is sufficient for an area of approximately 7.2 m ² .

A portion 16 of hydrated lime Ca (OH) ₂ - in powder form in an amount of approximately half the volume of the borehole is poured into the borehole and then the pulse compressed air device 1 with its sealing cone 18 is placed. By exerting a pressure pulse (arrow P; Fig. 1a), a pressure wave is created which drives the slaked lime into the thermal insulation layer 20 so that the slaked lime reaches the moistened area 10.1 and is distributed homogeneously there. The slaked lime absorbs moisture, which is initially chemically bonded when heat is released and then evaporates or evaporates.

The air pressure, read from a pressure gauge 25 attached to the compressed air tank 23, was 4.5 × 10 ⁵ Pa.

Filters were previously on the base areas of the floor 60 15 removably attached (see. Fig. 14), the outflowing Remove air from the dust particles.

Depending on the thickness of the thermal insulation layer and the Size of the wet area can be multiple pressure pulses are exerted, for example two or three pressure pulses, the between the respective pressure pulses Borehole is filled with the slaked lime.

After treatment with pressure impulses through the boreholes dry process air using a compressor, such as known per se, blown in through the marginal areas emerges again so that the water vapors are continuously discharged become. The entire dehumidification process is through the pulse method according to the invention is considerably reduced in time, and up to about 5 days, i.e. by about 60% compared to the known methods.

Fig. 2 shows another possibility of accommodation of hydrated lime in the borehole. The quicklime is in cartridges 9 packaged from very thin cellulose, such as tea bags. The pulp is shredded by the pressure pulse.

If the water damage or a mold attack on one Cover 27 found, it is recommended to drill a hole or drill several holes from below through the ceiling 27, as can be seen from FIG. 3. The portion 16 from Slaked lime is held by a plate-shaped sieve 26. The use of bags or cartridges 9 is present Case quite possible.

If the floating screed has no contact with the walls, the slaked lime over edge joints 36 (see FIG. 4) in the Insulation layer introduced. There are no drill holes on the building part drilled. For this purpose an in Fig. 5 shown air outlet nozzle 31 in the form of a cuboid Housing 32 with a slot-shaped air outlet 33. To seal the air outlet 33 on the The contact point with the screed is an all over the place Flat sealing element extending the length of the air outlet 34 provided. The housing 32 has two on the side arranged, sheet-like fixing elements 35 for insertion in the edge joint 36 (state according to FIG. 4).

The slaked lime is placed in a compressed air hose 7, to the pulse compressed air device 1 and to the air outlet nozzle 31 is connected, between the Portion 16 of the slaked lime and the air outlet nozzle 31 Air cushion 6 remains so that a mixture in the edge joint 36 impulsed from the quicklime and compressed air becomes. With the pressure pulse, the molecules become 22 of the hydrated lime entrained by the air flow 6 and better distributed. This variant of the method also has to the need to attach filters 15 on the opposite Marginal area must be respected.

The dehumidification of a corner area 37 is shown in FIG. 12 explained.

To the pulse compressed air device 1 are via compressed air lines 5.1 .... 5.n several air outlet nozzles lined up 14.1 .... 14.n, so-called injection tips connected, the forming an L-shaped arrangement 30 in the drilled Openings 13.1 .... 13.n are inserted. The quicklime was beforehand into the openings 13.1 .... 13.n via a funnel introduced. Because the short line sections are elastic are the position of air outlet nozzles 14.1 .... 14.n slightly correct. After one or more The slaked lime is distributed homogeneously in pressure pulses Fig. 12 shown moist area 10 and is there chemically bound with moisture. After that, the pulse air device 1 and the compressed air lines 5.1 .... 5.n and air outlet nozzles 14.1 .... 14.n removed and a blower inserted. The blower can, for example to a slot-shaped air outlet nozzle already described 31 are connected, which are in a slot (in Edge area) has been inserted, preferably on one corner opposite corner area 37. The through that Blown dry process air comes out of the Open openings 13.1 .... 13.n again and complete the dehumidification process.

With a floating screed, there is the possibility that Inserting injection tips directly into the edge joint 36 without drill the small holes, making the edge joint sections between the air outlet nozzles 14.1 .... 14.n with must be sealed with an adhesive tape.

The method according to the invention can also be used in a so-called Use the cross joint method in which the hydrated lime into the holes drilled at the crosses of a tile covering Openings 13.1 ... 13.n is poured in. In these openings then air outlet nozzles 14.1 .... 14.n become airtight plugged in via elastic compressed air lines 5.1 .... 5.n are connected to a compressed air distributor 4 (see Fig. 6; grid-shaped arrangement 40).

At the compressed air distributor 4 is the pulse compressed air device 1 connected directly or via a short line. The one caused by the compressed air pulse Pressure wave drives the individual molecules of the hydrated lime abruptly into the moist area of the thermal insulation layer into it.

13 shows an air blower 28 with a compressed air hose 7, which has a sheet metal plate 38 and one below lying soft foam seal 39 to the in the insulation layer 20 drilled opening is connected. The hydrated lime is poured into the compressed air hose 7. The compressed air-hydrated lime mixture arrives continuously in this way in the moist area. In the marginal areas Filters 15 can be seen, which ensure dust-free exhaust air.

FIGS. 7 and 8 show a further injection nozzle 41, which consist of a rectangular plate element 42, a pipe socket welded to the plate element 44 and a circumferential sealing strand 45 is composed. The equipment of the injection nozzle 41 also includes a FIGS. 9 and 10 shown anchoring element 52.

The plate element 42 has an opening 47 for anchoring the injection nozzle 41 and a further, larger opening 56 whose diameter on the pipe socket 44 (see. Fig. 8) is adjusted. The two openings 56; 47 lie on one Longitudinal axis 66 (see FIG. 7) of the plate element 42, wherein the smaller opening 47 in the middle of the plate element lies so that the mechanical contact pressure when fixing can be evenly distributed. The diameter of the smaller Opening 47 is slightly larger than the maximum width the joint (6 mm) and is 8 mm. The chrome-nickel steel manufactured plate member 42 is present Case 4 mm thick.

A T-piece 48 is on the short, straight pipe socket 44 screwed to which a hose-like air supply pipe 7 via a quick release coupling, not shown, easy to use either on the "left" or "right" Side can be connected.

The circumferential sealing strand 45 is on one of the pipe sockets 44 opposite underside 49 of the plate element 42 arranged. It is made of an elastomer, in particular material suitable for the seals, here: made of Butyl rubber manufactured, which among other things very low gas permeability having.

So that the anchoring element 52 has as little space as possible the slot-shaped dry air inlet opening 43, it is made of a metal wire with a diameter of 5 mm manufactured. The anchoring element 52 consists of a a threaded shaft 53 ending in a hook 46 and a screw nut 64 (see Fig. 9).

In one embodiment shown in FIG the anchoring element is designed as an anchor. This embodiment Using double hooks is beneficial because of the strain can be better distributed.

Function of the device according to FIGS. 7 to 11:

From a tile joint 51 (see FIG. 11) between two side by side lying tile slabs of a tile floor 70 the joint material is removed mechanically, as in the Fig. 9 shown until a slit-shaped dry air inlet opening 43 arises.

The blowing nozzle 41 is placed on the tile plates in such a way that the already prepared dry air inlet opening 43 is completely surrounded by the sealing strip 45. The anchoring element 52 is then through the opening 47 on the Plate element 42 into the dry air inlet opening 43 inserted and rotated by 90 °. The hook 46 engages the thermal insulation layer under the tile slabs. On the threaded shaft 53 of the anchoring element then screwed on the nut 64. Under the nut there is still a sealing ring 58, so the later pressure losses during blowing are avoided can. When tightening the nut 64, the hook presses 46 via an adhesive layer 63 against the underside 49 the tile plate and the the dry air inlet opening 43 surrounding sealing strand 45 deforms until one dense, flat air chamber 67 between the bottom 49 of the Tile plate and the top of the tile plates is created. This air chamber 67 is in contact with the lower one Dry air inlet opening 43 and through the larger opening 56 of the plate element 42 with the interior of the pipe socket 44th

Instead of the single hook, a double hook, like the Fig. 10 can be seen, are used so that when Tightening the nut 64 two tile slabs can be taken over. This can reduces the risk of damage to the tile slabs become. The thermal insulation layer to be treated exists in the present case from on a surface, here: one Concrete layer 17, laid foam sheets 20, which in turn are covered with tile slabs 62.1 ... 62.n.

At the base areas of the tile floor 70 were previously Filter 72 (see FIG. 11) removably attached, the Remove any dust particles from the air flowing out.

If the plate element 42 is fastened tightly to the tile plates, can the hose-like air supply pipe to the T-piece 48 7 are screwed (see FIG. 11). The Air supply pipe 7 is in turn connected to the pulse compressed air device 1 connected. At T-piece 48 there is another Locking disk 73 screwed on.

Air pressure up to 5.0 x 10 ⁵ Pa can be used in pulses. However, it is not impossible to continuously apply the air pressure. A portion of hydrated lime - Ca (OH) ₂ - in powder form is also poured into the dry air inlet opening 43 in an amount of approximately half the volume of the slot. The procedure is then similar, as already described, until the moisture is first chemically bonded while releasing heat and then evaporates or evaporates.

It is assumed that a slit-shaped dry air inlet opening 43 is sufficient on average for an area of up to 12 m ^{2 of} the area to be dried.

Reference symbol list :

1

Pulse Pressure Blow

2

Compressed air gun

3.1 .... 3.n

opening

4

Compressed air distribution

5.1 ... 5.n

Compressed air line

6

bubble

7

Line (compressed air hose)

8th

Compressed air outlet nozzle

9

cartridge

10

Area

11

exhaust nozzle

12

hand lever

13.1 .... 13.n

opening

14.1 .... 14.n

air outlet nozzle

15

filter

16

Portion (from slaked lime)

17

underground

18

sealing cone

19

flooring

20

Thermal insulation layer

21

screed

22

molecule

23

Air receiver

24

air pump

25

manometer

26

scree

27

blanket

28

fan

29

Compressed air inlet connection

30

arrangement

31

air outlet nozzle

32

casing

33

Air outlet (slot)

34

sealing element

35

Retaining member

36

edge joint

37

corner

38

sheet metal plate

39

Soft foam seal

40

arrangement

41

Injector

42

panel member

43

opening

44

pipe socket

45

sealing strip

46

hook

47

opening

48

Tee

49

bottom

50

contraption

51

tile joint

52

anchoring element

53

threaded shaft

56

opening

58

sealing ring

62.1 ... 62.n

tile panel

63

adhesive layer

64

fixing

66

longitudinal axis

67

air chamber

70

floor tiles

72

filter

73

closure disc

P

Arrows (compressed air pulse)

100

contraption

Claims (27)

Process for dehumidifying buildings and remedying water damage occurring on the parts of the building, in particular on dampened thermal insulation layers, in which a moisture-binding substance is introduced under pressure into the dampened area of the thermal insulation layer, the substance reacting exothermicly when absorbing moisture, characterized in that the Moisture-binding substance is a granulate or powder that is introduced into the treatment area of the thermal insulation layer in a pulsed manner using compressed air and accelerates evaporation of the moisture. A method according to claim 1, characterized in that the moisture-binding, exothermic reacting substance is powdered lime, such as hydrated lime. Method according to Claims 1 and 2, characterized in that the powdery substance is loosely incorporated in at least one opening (3.1 .... 3.n; 13.1 .... 13.n; 43) which is worked into the thermal insulation layer and extends to the moistened area ) is poured in, which
Substance is driven into the moist area under the action of at least one pressure wave and binds the moisture located there. A method according to claim 3, characterized in that a line (7) into which the powdery Substance is poured in such a way that an air cushion (6) remains between the opening and the portion of the powdery substance. A method according to claim 1 and 2, characterized in that the powdery substance in a cartridge; Cartridge or a net-like bag (9) is packed, which cartridge or bag is inserted into at least one opening worked into the thermal insulation layer and reaching as far as the moistened area, so that the powdery substance is driven into the moistened area under the action of at least one pressure wave and the moisture located there binds. Method according to claim 5, characterized in that the cartridge, cartridge or bag (9) is torn apart by the pressure wave. Method according to one of claims 1 to 6, characterized in that between the respective successive compressed air pulses, the opening (3.1 ..... 3.n; 13.1 .... 13.n; 43) or the line (7) is at least partially refilled with the powdery substance. Method according to one of the preceding claims, characterized in that a mixture of the powdery substance and the compressed air is introduced in pulses in the opening. Method according to one of the preceding claims, characterized in that a pressure of up to 10 x 10 ⁵ Pa, preferably up to 5 x 10 ⁵ Pa, is applied in pulses to the powdery substance or to the mixture of the powdery substance and the compressed air. Device (50; 100) for carrying out the method according to claims 1 to 9, comprising the following parts: a pulse compressed air device (1), and at least one injection nozzle (8; 31; 41; 14.1 ... 14.n), which can be adapted in an airtight manner to the respective opening (3.1 .... 3.n; 13.1 .... 13.n; 43) made in the structural part is. Apparatus according to claim 10, characterized in that the pulse compressed air device (1) comprises a compressed air gun (2) and a compressed air container (23) integrated therewith. Apparatus according to claim 11, characterized in that the compressed air container (23) is equipped with a manually operated air pump (24). Apparatus according to claims 11 and 12, characterized in that the compressed air container (23) can be fed with the compressed air by an external compressor (25). Device according to one of claims 10 to 13, characterized in that the pulse compressed air device (1) is connected via a compressed air hose (7) to a compressed air distributor (4) which in turn is connected via compressed air lines (5.1 .... 5.n ) is connected to at least two injection nozzles (14.1 .... 14.n; 31; 41). Apparatus according to claim 14, characterized in that the injection nozzles (14.1 .... 14.n; 41) and the compressed air lines (5.1 .... 5.n) form a grid-like arrangement (30), the compressed air lines being approximately plane-parallel to each treating surface of the building part. Device according to claim 14, characterized in that the injection nozzles (14.1 .... 14.n; 41) and the compressed air lines form an L-shaped arrangement (40). Device according to one of claims 14 to 16, characterized in that the compressed air lines (5.1 .... 5.n) connecting the injection nozzles (14.1 .... 14.n; 41) are elastic. Device according to one of claims 10 to 17, characterized in that the injection nozzle (41) consists of the following parts: a plate element (42) with an opening (43), a pipe socket (44) for connection to an air supply pipe, such as compressed air hose (7), which pipe socket is connected to the plate element (42) in the region of the opening (43), a circumferential sealing strip (45) which is arranged on an underside (49) of the plate element (42) facing away from the pipe socket (44), which plate element (42) has at least one further opening (47) for anchoring the injection nozzle in the substrate (17) , or is provided below a tile joint (51), wherein the injection nozzle (41) is equipped with an anchoring element (52) which can be inserted into the ground via the further opening (47), with which the injection nozzle can be fixed on the floor or on the wall. Apparatus according to claim 18, characterized in that the plate element (42) is circular or oval in plan view of its flat side. Apparatus according to claim 18, characterized in that the plate element (42) is polygonal, in particular rectangular, in plan view of its flat side. Device according to one of claims 18 to 20, characterized in that the anchoring element (52) is hook-shaped. Device according to one of claims 18 to 21, characterized in that the anchoring element (52) introduced into the dry air inlet opening (43) engages with its hook (46) under the respective tile plate (62.1 ... 62.n) and through the fixing element (64) opposite the hook, such as an eccentric, wedge or screw, is fixed. Device according to one of claims 18 to 22, characterized in that the anchoring element (52) is a piece of wire or a bolt which ends in the hook (46). Apparatus according to claim 18, characterized in that the pipe socket (44) is a pipe nipple or angle. Apparatus according to claim 18, characterized in that the pipe socket (44) is part of a T-piece (48). Apparatus according to claim 18, characterized in that the sealing strand (45) consists of an elastomeric material such as butyl rubber. Apparatus according to claim 18, characterized in that the plate element (42) consists of a corrosion-resistant material such as chrome-nickel steel.

Images