DE8521143U1 - Device for cleaning large textile surfaces, especially carpets and rugs - Google Patents

Description

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• « · · > Il OR. H. FEDER DIPL.-PHYS. DR. W.O. FEDER- PATENT ATTORNEYS 85-20-57 KLAUS 0. WALTER LAWYER DmfntnfkarKrstr« 37,4OQO DttweWorf ti

Mr. Horst Keuffeldt, Bachstr.150,4000 Düsseldorf, Mr. Thoma« Kauffeldt, KyffhSuser Str. 27,

4000 Dusseldorf

Device for cleaning large textile surfaces

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The innovation concerns a device for cleaning large-area textile coverings, in particular carpets and rugs, with a suction nozzle connected to at least one vacuum chamber via a hose connection, on which at least one spray nozzle connected to a fresh water supply line and a device for generating ultrasound directed at the textile covering are arranged.

DE-PS 27 43 530 describes a device for cleaning large textile coverings. With at least one spray nozzle connected to a fresh water supply and directed at the textile covering, with at least one suction nozzle connected to a vacuum line, with several electric motor-driven suction fans, each of which is connected to its own vacuum chamber with its suction nozzle, and with a dirty water drain extending from the vacuum chambers connected to one another, through which the dirty water can be drained off by means of a pump. With this known device, for example, carpets can be cleaned in the heat, i.e. fresh water, which can be heated and provided with a cleaning agent, is sprayed onto the carpet under high pressure and sucked away again after a relatively short exposure time. This suction process takes place.

through the suction mouthpieces that close the pressure chambers.

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It has also already become known that the cleaning effect of such devices can be increased by arranging a device for generating ultrasound on the suction head and directed at the textile cover. However, the known devices of this type do not provide satisfactory cleaning results and are

IG complicated in scoring and handling. This is in

primarily due to the fact that it is ensured Q that you fly into the textile surface

applied ion exchanger) to form an ultrasonic field that is strong enough to produce the necessary cleaning effect.

The innovation is based on the realization that it is extremely difficult to attach and adjust the device for generating ultrasound in such a way that a sufficient amount of ultrasound energy enters the water film when a thin sprayed water film is used, which may also contain disruptive air bubbles.

- _&Lgr; The problem underlying the innovation was to design a device of the type mentioned at the beginning and in the preamble of claim 1 in such a way that it is possible to achieve an optimal cleaning effect with the ultrasonic energy used.

The solution to this problem is achieved by using the Harkaalan specified in the characteristic part of protection claim 1.

Advantageous embodiments of the device in question are described in the subclaims.

With this innovative device, not only is a thin layer of Hassarfila sprayed onto the textile covering.

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but a real water column is created, in which both the radiation surfaces of the ultrasonic transmitters
as well as the spray nozzles. In this way
the ultrasound field is directly in the water column
itself and can therefore achieve maximum effect
develop without causing major losses. The _% <

Water column is generated and limited in a way that is Textile cover attached rinsing chamber, whose interior \-

Fresh water is constantly supplied via the spray nozzles, while the water that is created at the lower edge, which is placed on the textile cover, and under the lower edge ₍

The water level is regulated so that the rinse water in the rinsing ■■■

chamber a water level of constant height is maintained.

is maintained so that it is ensured that the ultrasonic transducers and the spray nozzles are constantly immersed in the water &Ggr;

immerse. The rinsing chamber can be placed on the floor;

sliding or movable floor adapter ,

which is connected via one or more vacuum lines to U a basic device of known design in which
the necessary negative pressure is generated and in which ;'.

the necessary electrical equipment for generating ; ultrasound and, if necessary, for controlling the ;

Water supply and/or water drainage must be included
can be used . The spray nozzles arranged within the water column provide additional treatment with ultra- j

sound causes a kind of "underwater massage" of the textile cover !, through which the ultrasound field '·■

loosened or blasted dirt particles from the fluorine
the textile care. The splashing of water;

below the Wassarobarfliehe also has &uacgr;&bgr;&eegr; advantage, §j

that no air bubbles disturb the ultrasound field
can occur.

It can be worked with pure water, which
Textiles can also be cleaned with
«ittaln pre-treated.: : ·":'

The drawings show:

Fig. 1 shows a schematic vertical section through a floor adapter for a

Device for cleaning large textile surfaces;
C ' Fig. 2 a view of the floor adapter according to Fig.l of

below;

Fig. 3 a basic device for connecting a floor adapter according to Figs. 1 and 2 in a reduced view.

Fig. 4 is a vertical section corresponding to Fig. 1 of a modified embodiment of the floor dept. 20

The device shown in Fig. 1 to 3 in a highly schematic manner has a basic unit 1 in which one or more vacuum chambers are arranged in a manner not specifically shown and known per se, in which a vacuum is generated by suction fans (also not shown). The basic unit 1 has at least one suction nozzle 2 to which a vacuum hose 3 leading to the base adapter is connected. It also has a connection nozzle 4 for draining the dirty water. A control panel 5 has the switches and display devices necessary for starting up and controlling the device in a known manner. The electrical energy generated in the basic unit for generating ultrasound is taken from the connection cable 6.

The floor adapter has a rinsing chamber 8 designed as a housing with an essentially rectangular cross-section. (It is mounted in a frame 10 provided with rollers 11 and can be raised.

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In the following, an exemplary embodiment of the new device is explained in more detail using the attached drawings.

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The flushing chamber 8, which is open on its underside, has side walls which are designed as a circumferential double wall. Between the four adjacent outer walls 8.11, 8.13, 8.12 and 8.14 and the four adjacent inner walls 8.21, 8.23, 8.22 and 8.24, a substantially ring-shaped intermediate space 8.3 is created as a suction chamber. This suction chamber is connected to at least one vacuum chamber in the base unit 1 via a suction connection opening 12.1 and a hose connection 3.1. The lower edge of the outer walls has a circumferential flange which is shown in Fig. 1 with

IS 8.111 or 8.121 and as can be seen from Fig. 2

also on the outside walls not visible in Fig. 1. With this circumferential flange, the underside of which is the flat-machined sealing surface 8.112 and 8.122, the rinsing chamber is placed on the textile covering to be cleaned, which is shown in Fig. 1 as a carpet with a base fabric 7.2 and a pile 7.3, which is laid on a screed 7.1.

The rinsing chamber 8 can be open at the top, but it can also be closed by a lid 9, which is preferably made of transparent material, e.g. Plexiglas, so that the rinsing chamber can be observed during the cleaning process. The surrounding flange can also be provided with ribs or runners on the underside, which preferably run parallel to the direction of movement S. In this case it is particularly important that the inner walls 8.22, 8.23, 8.24 reach down to the base fabric and prevent the rinsing water from flowing out.

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The interior space 8.4 of the rinsing chamber 8 within the inner walls can be connected in an upper area via a connection opening 12.2 and a hose connection 3.2 to a

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The two hose connections 3.1 and 3.2 can either be connected to a negative pressure chamber or a positive pressure chamber in the basic unit 1. The two hose connections 3.1 and 3.2 can either lead into the basic unit 1 individually in a manner not shown. However, they can also be combined to form a collecting hose 3 if the same pressure is to prevail in the rinsing chamber as in the suction chamber.

Furthermore, a device 15 for generating ultrasound is arranged in the inner chamber 8.4 and is connected to the base unit 1 via a connecting cable 6. Two ultrasound generators 16 pointing downwards are arranged on this device.

Furthermore, three spray nozzles 13 are arranged in the interior 8.4 of the rinsing chamber 8, which are connected to a fresh water supply line 14. The specified direction of displacement of the rinsing chamber 8 is indicated by the arrow direction S.

For reasons to be explained below, the ultrasonic transducers are arranged in front of the spray nozzles 13 with respect to the direction of displacement S. Furthermore, the bottom edge 8.211 of the rear inner wall 8.21 with respect to the direction of displacement S has a predetermined distance of several mm from the support plane defined by the sealing surfaces 8.112 and 8.122, while, for example, the bottom edge of the front inner wall 8.22 extends down to the textile support.

In the embodiment shown, three spray nozzles 13 and two ultrasonic generators 16 are arranged within the rinsing chamber 8. Of course, depending on the size of the rinsing chamber, it is _possible to arrange both the spray nozzles 13 and the ultrasonic generators 16 in a number.

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The movement and guidance of the floor adapter can be carried out via guide rods arranged in the housing, which are known per se and not specifically shown, but it can be self-propelled thanks to the rollers 11.

The device described in Fig. i to ä operates

in such a way that fresh water FH is supplied through the spray nozzles 13 as soon as the floor adapter is placed on the carpet to be cleaned 7.2, and in such a way that the water level in the interior 8.4 rises to the height W. At the same time, the water passing through under the lower edge of the inner wall 8.21 and to a lesser extent also under the lower edges of the inner walls 8,22, 8.23, 8.24 is discharged through the suction opening 12.1 and the hose connection 3.1 in the direction of L1 due to the negative pressure present in the suction chamber 8.3.

The inlet and outlet of the water are adjusted so that the water level H is at such a height that both the spray nozzles 13 and at least the wiping surfaces of the ultrasonic generators 16 are completely immersed in the water. If the water level W reaches the

Intake opening or overflow opening 12.2, the

Excess water is drained via hose 3.2 in the direction of arrow L2.

The ultrasonic field 16.1 generated by the ultrasonic generators 16 blasts off or loosens the dirt adhering to the carpet 7.2 and the pile 7.3. When the adapter continues to move in the direction of the arrow S, the area of the carpet treated in this way comes under the spray nozzles 13 and the impacting water jet 13.1 completely dissolves the loosened and dissolved dirt and distributes it in the water. This method of treatment results in the «attached» carpet particles being

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The water inlet and outlet can be set to a fixed value. The inlet can be dimensioned so that the water level W ends exactly at the lower edge of the suction opening 12*2 and the inlet is set so that a certain proportion of the water is constantly drained in the direction of L2.

Figure 4 shows, in accordance with Figure 1, a vertical section through an adapter with some changes compared to the embodiment shown in Figure 1, whereby these changes can be applied individually or all together. In Figure 4, the same parts are designated with the same reference numbers as in Figure 1. In this embodiment, the interior 6.4 of the flushing chamber is open at the top, so that the full atmospheric pressure acts on the water surface W. In this case, no air is sucked out through the line 3.2, but the opening 12.2 only serves as an overflow opening. Furthermore, here, parallel to the inner wall 8.21, which lies behind the spray nozzles 13 in the direction of movement, another wall 17 is inserted, so that an additional chamber 17.1 is created, from which the air and

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enriched water is located essentially at the front or on the sides, while with respect to the direction of displacement S behind the spray nozzles 13 an area is created in which almost clear water flows along the carpet and is sucked off in the direction SW. This means that for each area of the carpet when the floor adapter is moved in the direction S,

a loosening and dissolving of the dirt particles, then a &Ggr; ) kind of "underwater massage" with further detachment and

Distribution of the dirt particles and finally a kind of rinsing with fresh water. This guarantees an optimal cleaning effect.

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the water that has penetrated can be sucked out. In this case, all the inner walls 8.21 to 8.24 reach until they come into contact with the base fabric 7.2 of the carpet, so that only a small amount of liquid enters the annular chamber 8.3, which is sucked out together with the air at 3.1. On the other hand, under the lower edge 17.2 of the wall . 17, which is a few millimeters above the carpet,

a considerable amount of flushing water from room 8.41, ( j which is extracted together with the air from room 17.1. The suction hoses 3.1, 3.2 and 3.3 must be dimensioned so that the flow resistance does not hinder the extraction, even at high extraction speeds and with changing water:air mixing ratios.

Furthermore, in this embodiment, in room 8.4, a

Float is provided, the float rod 19 protrudes from the top of the sink and the water level can be read on a scale 20. Based on this water level indication, the fresh water supply 14 to the spray nozzles 13 can be regulated manually or automatically by electrical or mechanical means so that the desired water level is maintained. If the water level rises too high despite this regulation, water can flow out through the drain opening 3.2.

30

Instead of a float, another measuring device can be used to measure the water level, e.g. a device for measuring the water level using an electric or magnetic field. The result of the measurement can also be sent electrically to the control panel 5 in the base unit 1 and can automatically adjust the fresh water supply and other adjustment devices.

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Furthermore, in this embodiment, the frame 10 and the rollers 11 are omitted, so that the entire adapter rests only on the flanges 8.111 and 8.121, which are particularly wide here, and the flanges 8.131 and 8.141 on the long sides. Skids or ribs (not shown) can be attached to the undersides of the flanges, in particular the flanges 8.111 and 8.121 on the transverse sides.

be provided to facilitate the displacement of the adapter in the (") direction S. If skids are provided on the transverse walls, the undersides of the flanges on the longitudinal walls must be correspondingly lower. As the majority of the rinsing water is sucked off through the chamber 17.1, extensive drying of the pile 7.3 is achieved in the annular space 8.3, from which the air is sucked off through the hose connection 3.1.

20

Furthermore, in the embodiment according to Fig. 4, it is additionally provided that the suction openings 12.1, 12.2 and 12.3 can be closed completely or partially by slides 12.11, 12.21, 12.31, so that it is possible to influence the suction power or, in the case of the opening 12.2, the amount of water drained. The gap between the wall 8.21 and the base fabric of the carpet in Fig. 1 or between the wall 17 and the base fabric of the carpet can also be changed by a slide 17.21 - as shown in Fig. 4. These slides can be adjusted either manually before cleaning begins or by appropriate devices such as Bowden cables during cleaning, whereby it is important that a strong stream of rinsing water always passes through the gap under the lower edge B.211 or 17.2. The adjustment of the sliders can be done from the control panel S in the basic device 1, as

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all settings can be made manually or automatically from the control panel. All of these settings can be controlled depending on the height of the water level in the chamber 8.4, which must always be above the radiation surface of the ultrasonic generator and above the spray nozzles. From time to time, rinse water can be drained from the basic device 1 through the drain connection 4.

If the height of the water level is reported to the control panel, a locking device can also be provided in the control panel, which ensures that the ultrasonic generator 15 is only switched on when the ultrasonic transmitters 16 are immersed in the rinsing water.

Claims (14)

&bgr; · &eegr; r f a &bull; a a a ■ a 85-20-57 - 12 - 10 15 ■ Protection claims 1. Device for cleaning large-area textile surfaces layers, in particular carpets and rugs, with a suction nozzle connected to at least one vacuum chamber via a hose connection, on which at least one spray nozzle connected to a fresh water supply line and a device for generating ultrasound directed at the textile layer are arranged, characterized in that the suction nozzle is designed as a rinsing chamber (8) which can be placed on the textile layer (7.2-7.3) and displaced thereon, and which is open on its underside, the side walls of which are designed as a circumferential double wall (8.11-8.12-8.13-8.14 or 8.21-8.22-8.23-8.24) at least in a partial area adjoining the underside, the connected intermediate space (8.3) between the outer wall (8.UB.12-8.13-8.14) and inner wall (8.21-8.22-8.23-8.24) via a suction connection (12.1) is connected to a vacuum chamber and a downward opening, i* essentially &mdash;&mdash;&mdash;-***-»*«*-=--'-»·&mdash;&mdash;'&mdash;■&mdash;""· &bull;ti ·«<· ··■ 11 ·1 Y ■ · 85- 20-57 - 13 - an annular suction nozzle is formed and the rinsing chamber (8) in the state placed on the textile support (7.2-7.3) rests on at least the lower edge (8.111 and 6.121) of the outer wall provided with sealing surfaces (8.112 and 8.122) and in the interior (8.4) within the inner wall at a predetermined height above the lower edge of the outer wall at least one spray nozzle (13) and at least one ultrasonic generator (16) of the device for generating ultrasound are arranged and a device (12.2-3.2) for regulating the water level in the rinsing chamber to a predetermined height above the radiation surface of the ultrasonic generator (16) and above the spray nozzle (13) is provided. 2. Device according to claim X, characterized in that the rinsing chamber is closed at the top or can be closed by a lid. 3. Device according to claim 1 or 2, characterized in that the device for regulating the water level has an overflow opening (12.2) arranged at a predetermined height on the inner wall (8.22) which is connected to a vacuum chamber. 4. Device according to one of claims 1, 2 or 3, characterized in that a device, e.g. an oscillator, is arranged in the rinsing chamber (8), which measures the height of the overflow in the rinsing chamber and the tJQSsar inflow is regulated accordingly. 30 35 5. Device according to one of claims 1 to 4, characterized in that, with respect to the predetermined displacement direction (S) of the suction mouthpiece, the ultrasound transmitter or transmitters (13) are arranged in front of the spray nozzle (13) or the spray nozzles. 85-20-57 - 14·- 6. Device according to claim 5, characterized in that at least the lower edge (8.211) of the relative to the predetermined displacement direction (S) of the rear part ' (8.21) of the inner wall a predetermined distance from the by the alignment surfaces (8.112, 8.122).
10 7. Device according to claim 5, characterized in that parallel to the rear part (8.21) of the inner wall in relation to the predetermined direction of displacement (S), there is a further partition wall (17) in the flushing chamber, the lower edge of which has a predetermined distance from the support plane defined by the sealing surfaces (8.112, 8.122) and the intermediate chamber (17.1) thus formed is connected to a vacuum chamber via a suction connection (3.3). 20 8. Device according to one of claims 1 to 7, characterized in that the rinsing chamber (8) is suspended in a height-adjustable frame (10) provided with rollers (11). C25 9. Device according to claim 6, 7 or 8, characterized in that the distance of the base from the support plane provided by the sealing surface (8.112, 8.122) can be changed by arranging a slide (17.21) displaceable in a vertical direction on the wall (8.21; 17). 10. Device according to one of claims 1 to 9, characterized in that flanges (8.111, 8.121, 8.131, 841) are arranged on the underside of the outer walls. ooii &bull;&bull;&bull;&bull;&bull;»OOi &bull; · ■ · &Ggr;&Iacgr; III »&diams;»iiiC'Oif · t · OAI "· · »I 1 ·« I 00 Il 85-20-57 - '15 - v. 11. Device according to claim 10, characterized in net that the flushing chamber (8) and flanges (8a) are made of metal and that the sealing surfaces are machined metal surfaces. 12. Device according to one of claims 1 to 10, characterized in that the sealing surfaces on the lower edge of the outer wall are sealing lips made of soft material. 13. Device according to claim 10, characterized in net that the undersides of the circumferential flange are provided with skids or ribs. 14. Device according to one of claims 1 to 13, characterized in that the suction openings (12.1, 12.2, 12.3) can be closed completely or partially by slides.