EP2880221B9 - Self-propelled floor cleaning machine with filter system module - Google Patents

Description

The invention relates to a self-propelled floor cleaning machine, in particular sweeper, comprising a chassis, a Sauggebläseeinrichtung and a filter device, which is connected upstream in an air flow path of the Sauggebläseeinrichtung.

The invention further relates to a filter system module.

In the non-prepublished international patent application PCT / EP2011 / 051656 of February 4, 2011 the same applicant is a sweeper with a rotary driven sweeping brush and a hopper and a suction fan, which is a suction port and a suction shaft with the sweeping brush in the flow direction for sucking dusty air, and at least one filter for depositing Dust from the extracted air, wherein the at least one filter for cleaning clean side over at least one external air valve with stored in a pressure vessel and pressurized external air is acted upon, described. The pressure vessel has a pressure vessel wall which lies opposite the clean side of the at least one filter and on which the at least one external air valve is arranged, wherein a section of the suction channel extends between the pressure vessel wall and the clean side of the at least one filter.

Sweepers as examples of self-propelled floor cleaning machines are for example from DE 26 29 967 A1 known. With their help, a floor to be cleaned surface can be swept, with gross debris is transferred by means of the rotating driven sweeping brush in the hopper. When sweeping a dry ground surface, there is often a considerable amount of dust. To counteract this, the sweeper has a suction fan, which via a suction channel and a suction duct with the Sweeping brush is in flow communication. With the help of the suction fan dusty air can be sucked off, so that the dust is kept low when sweeping the dry floor surface. The extracted air flows through a filter for separating dust on its way from the sweeping brush to the suction fan. The filter builds up over time and therefore needs to be cleaned after some time. For this purpose, the sweeper to a pressure vessel, is stored in the pressurized air and from which the air via an external air valve of the clean side of the filter, so the side of the filter facing away from the hopper can be supplied. The pressurized external air flows through the filter against the prevailing during normal sweeping flow direction of the intake air. This will clean the filter.

At the time of the DE 26 29 967 A1 known sweeper come a variety of filters are used, which are each designed in the form of a filter cartridge. Each eleven filter cartridges is associated with an air tube which extends above the filter cartridges and has openings or nozzles substantially in the axis of the filter cartridges, via which the filter cartridges can be acted upon with external air. The external air is supplied to the air pipes from a pressure vessel in the form of an air distribution pipe via a solenoid valve. The pressure in the air distribution pipe is more than 7 bar and each solenoid valve is opened for a period of 0.1 seconds. As a result, each eleven filter cartridges a common air jet is supplied, which flows through the associated air tube.

The DE 10 2010 001 678 A1 discloses a sweeper with a rotary driven sweeping brush and a hopper and with a suction fan, which communicates via a suction channel and a suction duct with the sweeping brush for sucking dusty air and at least one filter for separating dust from the extracted air, wherein the at least one filter for cleaning on the clean side via at least one external air valve with stored in a pressure vessel and pressurized external air can be acted upon. The pressure vessel has a pressure vessel wall which is opposite to the clean side of the at least one filter and to which the at least one external air valve is arranged, wherein a portion of the suction channel extends between the pressure vessel wall and the clean side of the at least one filter.

From the EP 1 922 970 A2 For example, a vacuum cleaner is known which has a removable filter basket which is accessible from an outside of a housing.

The invention has for its object to provide a self-cleaning floor cleaning machine of the type mentioned, which is universally applicable.

This object is achieved in the aforementioned self-propelled floor cleaning machine according to the invention in that a receiving device for at least one filter system module is arranged on the chassis, wherein the at least one filter system module on the receiving device as a whole, it is fixed or fixable that the at least one filter system module comprises at least one pressure vessel, a filter cleaning device, at least one filter and one or more ports, and that the port or ports comprise one or more of the following port types: compressed air port, exhaust port, electrical power supply port , Signal connection.

This makes it possible to equip the self-propelled floor cleaning machine with a filter device which has a filter cleaning function. As a result, an effective suction operation can be realized.

The filter system module is designed so that the modifications of the floor cleaning machine to provide them with the filter module system are minimal. Basically, only the receiving device must be provided as a mechanical fixing unit and it must be provided the appropriate connections for the suction and the Abreinigungsbetrieb.

This in turn makes it possible to provide the self-propelled floor cleaning machine alternatively with another filter device such as a cartridge filter. A user then has the option of providing, for example, a cartridge filter or a filter system module according to the invention.

Since the filter system module forms its own "closed" unit, it can be optimally positioned compared to other machine components. This in turn makes easy maintenance possible. In particular, a simple access to the filter system module, for example, to replace a filter allows.

The connector (s) include one or more of the following connector types: compressed air connector, exhaust connector, electrical power connector, signal connector. About a compressed air connection can be the Pressure vessel loaded with compressed air. This stored compressed air is then ready, in particular controlled and preferably automatically controls the at least one filter to apply compressed air pulses to clean this. The filter system module can be fluidically connected to the suction fan device via a suction connection in order to allow a normal suction operation (in particular sweeping / suction operation), in which dust-laden air is sucked in, through which at least one filter flows, thereby cleaning and substantially dust-free air is blown off. Via a supply connection for electrical energy, one or more components of the filter system module that require electrical energy, such as, in particular, an electromagnet of an external air valve, can be supplied accordingly. A signal connection can be used to perform a controlled filter cleaning. In one embodiment, the supply connection for electrical energy also indirectly forms a signal connection, for example when a compressed air pulse is triggered by switching off an excitation current, then the filter cleaning is controlled via a controlled energy supply.

In one embodiment, the at least one filter system module comprises a compressor device and / or a compressed air connection for establishing a fluid-effective connection with a compressor device. The compressor device provides compressed air for loading the compressed air reservoir. The compressor device can be arranged outside the filter system module. Accordingly, a fluid-effective connection must be provided via a connection (compressed air connection) to the filter system module. Alternatively or additionally, it is possible that the compressor device is part of the filter system module and in particular sits on this.

It can be provided that the compressor device is arranged on the chassis and in particular is not part of the filter system module.

In one embodiment, the receiving device comprises at least one receptacle into which the at least one filter system module is inserted or detachably insertable. In particular, the receptacle is designed to that one or more cartridge filters are alternatively usable. The receiving device can be achieved in a simple manner, a mechanical fixation of the filter system module to the chassis.

In one embodiment, the receiving device and / or the at least one filter system module with respect to the direction of gravity when the floor cleaning machine rests on a horizontal surface, below and in particular arranged directly below a driver's seat. This can optimize a Saugkanalführung. It can be a floor cleaning machine with compact dimensions realize.

For the same reason, it is favorable if the receiving device and / or the at least one filter system module above with respect to the direction of gravity, when the floor cleaning machine is placed on a horizontal surface, and in particular directly above a hopper and / or a sweeping roller is arranged. Furthermore, the length of a flow path can be minimized.

It is advantageous if the filter cleaning device is arranged in the pressure vessel. This results in a compact structure with an effective filter cleaning.

Conveniently, the filter cleaning device comprises at least one external air valve through which the at least one filter can be acted upon clean side for cleaning with external air. This makes it easy to achieve a filter cleaning by means of compressed air. One or more compressed air pulses, with which the at least one filter is acted upon on the clean side, lead to a filter vibration and to the removal of absorbed dust.

It is advantageous if the at least one pressure vessel has a negative pressure region and an overpressure region, wherein the negative pressure region and the overpressure region are fluid-tightly separated from one another. The overpressure area forms the actual pressure vessel. In the overpressure area can be stored compressed air, which is then ready to dissolve compressed air pulses for filter cleaning can. The underpressure region is a transitional region through which a stream of air purified by the at least one filter flows through the dust.

In particular, the vacuum region is in fluid communication with the suction fan device. This allows a suction operation.

It is advantageous if at least one compressed air connection is arranged at the overpressure region. As a result, the overpressure region can be loaded with pressure, in particular to enable a controlled filter cleaning.

In one embodiment, the at least one pressure vessel to a pressure vessel wall as a partition wall between the negative pressure region and the overpressure region, wherein in particular the pressure vessel wall is opposite to a clean side of the at least one filter. The corresponding filter system module thereby has at least two chambers. A chamber allows normal suction operation. It includes the vacuum area. The other chamber allows a filter cleaning by compressed air.

In particular, at least one external air valve is arranged on the pressure vessel wall. This makes it easy to position the at least one external air valve.

In one embodiment, the at least one pressure vessel has a housing and at least one lid, which closes the housing in a fluid-tight manner, wherein the at least one filter is arranged on the housing and in particular on the housing bottom and wherein in particular the housing is formed trough-shaped. Through the lid, which can be opened, it is possible to access the at least one filter in particular on the clean side. This makes it possible to easily filter replacement. The arrangement of the filter on the housing bottom can be easily provide a multi-chamber filter system module. By a trough-shaped design of the housing can be achieved with respect to the housing in a simple manner, a fluid-tight closure of the lid.

It is advantageous if the at least one cover is held on the housing via a hinge device and can be opened relative to the housing. As a result, it is possible in particular on the clean side to allow access to the at least one filter in order to be able to replace it in a simple manner.

A compact construction results if at least one of the following elements is arranged on the at least one cover: an overpressure region of the at least one pressure vessel, a vessel wall as a partition between an overpressure region and a negative pressure region of the at least one pressure vessel, a hold-down device for the at least one filter , the filter cleaning device, one or more ports. In particular, the components essential for filter cleaning can be arranged on the lid. As a result, in turn, it is possible, for example, when the lid is open and, for example, unfolded, that a relatively unhindered access to the at least one filter is achieved in order to be able to replace it in a simple manner.

In particular, a negative pressure region of the pressure vessel is arranged in the housing. This makes it possible to form a closed filter system module which has the components essential for filter cleaning and in so doing enables the normal "suction operation (in particular sweeping-suction operation).

In one embodiment, an adjusting device for the at least one cover is provided, through which an open folding position of at least a lid relative to the housing can be fixed. As a result, for example, a filter exchange can be carried out in a simple manner.

In particular, a seal is provided, which is arranged on the at least one lid and / or in the housing and which ensures a seal between the at least one lid and the housing. As a result, a fluid-tight seal can be achieved in a simple manner. As a result, for example, a negative pressure region (and an overpressure region) in the filter system module can be realized in a simple manner.

It is structurally favorable if the housing has at least one recess on a housing bottom, on which the at least one filter can be inserted. This makes it possible, for example, to use the filter loosely on the housing bottom. In turn, maintenance is possible in a simple manner; a filter replacement can be performed with little effort and in particular tool-free.

In particular, the housing bottom on the at least one recess on a support surface for the at least one filter. By the support surface a blocking surface for the filter is provided to provide a position assurance in at least one direction.

It is advantageous if a seal is arranged between a boundary wall of the at least one recess in the housing bottom and the at least one filter, wherein in particular the seal bears against a lateral side of the at least one filter and the lateral side lies between a dirty side and a clean side. This allows a certain clearance for the distance between the filter and the boundary wall. On the one hand, this allows an effective seal between the boundary wall and the at least one filter and, on the other hand, a filter exchange can be realized in a simple manner. The seal is, for example, molded or cast directly on filter lamellae and forms a frame.

In one embodiment, a spring-loaded closure device, which in particular comprises one or more screws, is provided for holding the at least one lid on the housing in a closed position. As a result of the spring-loaded closure device, the at least one cover can be pressed against the housing in order to achieve a fluid-tight closure. At the same time, a correspondingly necessary force can be exerted in order to axially fix the at least one filter in the housing via a hold-down device.

It is favorable for an operator if one or more depressions, which are open towards the at least one recess, are arranged on the housing bottom. Through these troughs, an operator can contact the at least one filter, in particular directly on a holder, in order to allow easy removal of the filter.

It is advantageous if the pressure vessel has a first pressure vessel wall as a partition wall between an overpressure region and a negative pressure region and has at least one second pressure vessel wall which closes the overpressure region in a fluid-tight manner, the filter purification device being fixed to the first pressure vessel wall and the second pressure vessel wall. This results in an effective mechanical fixation of the filter cleaning device (and in particular of one or more external air valves) in the filter system module. It can be realized so high pressure air pulses. This in turn results in an effective filter cleaning.

In one embodiment, the at least one filter has at least approximately a rectangular cross section.

In particular, the receiving direction for the alternative recording is formed at least one cartridge filter and in particular flow connections for a suction flow of the at least one cartridge filter for the at least one filter module system can be used. This allows the floor cleaning machine Alternatively, operate with the at least one cartridge filter or it may be a filter system module provided with a filter cleaning device.

It is particularly advantageous if the filter system module forms an independent and independent from the rest of the floor cleaning unit, which is mechanically connected to the chassis via the receiving device and functional over the one or more connections with respect to suction flow and compressed air flow and optionally electrical power supply and / or Signalbeaufschlagung the floor cleaning machine is connected, wherein the one or more connections include one or more of the following types of connections: compressed air connection, suction connection, supply connection for electrical energy, signal connection.

It is particularly advantageous if the at least one filter on the at least one pressure vessel is replaceable on the cleanroom side. This results in a maintenance optimized for the operator.

According to the invention, a filter system module for a self-propelled floor cleaning machine is provided which comprises at least one pressure vessel, a filter cleaning device, at least one filter and one or more ports, wherein the filter system module can be handled as a unit.

Further advantageous embodiments of such a filter system module have already been explained in connection with the self-propelled floor cleaning machine according to the invention.

Figur 1

eine perspektivische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen selbstfahrenden Bodenreinigungsmaschine mit einem weggeklappten Fahrersitzbereich;

Figur 2

die Bodenreinigungsmaschine gemäß Figur 1 mit einem aufgeklappten Filtersystemmodul;

Figur 3

eine Teilschnittansicht der Bodenreinigungsmaschine gemäß Figur 1;

Figur 4

eine perspektivische Darstellung eines Ausführungsbeispiels eines Filtersystemmoduls;

Figur 5

eine Schnittansicht längs der Linie 5-5 gemäß Figur 4;

Figur 6

eine Schnittansicht längs der Linie 6-6 gemäß Figur 4;

Figur 7

das Filtersystemmodul gemäß Figur 4 bei geöffnetem Deckel und zugänglichem Filter;

Figur 8

eine Schnittansicht des Filtersystemmoduls gemäß Figur 7 längs der Linie 8-8;

Figur 9

eine perspektivische Ansicht eines weiteren Ausführungsbeispiels eines erfindungsgemäßen Filtersystemmoduls; und

Figur 10

das Filtersystemmodul gemäß Figur 9 bei geöffnetem Deckel.

The following description of preferred embodiments is used in conjunction with the drawings for further explanation of the invention. Show it:

FIG. 1

a perspective view of an embodiment of a self-propelled floor cleaning machine according to the invention with a weggeklappten driver's seat area;

FIG. 2

the floor cleaning machine according to FIG. 1 with an unfolded filter system module;

FIG. 3

a partial sectional view of the floor cleaning machine according to FIG. 1 ;

FIG. 4

a perspective view of an embodiment of a filter system module;

FIG. 5

a sectional view taken along the line 5-5 according to FIG. 4 ;

FIG. 6

a sectional view taken along the line 6-6 according to FIG. 4 ;

FIG. 7

the filter system module according to FIG. 4 with the lid open and the filter accessible;

FIG. 8

a sectional view of the filter system module according to FIG. 7 along the line 8-8;

FIG. 9

a perspective view of another embodiment of a filter system module according to the invention; and

FIG. 10

the filter system module according to FIG. 9 with the lid open.

An embodiment of a self-propelled floor cleaning machine according to the invention is a sweeper, which in the FIGS. 1 to 3 shown as a whole and designated there with 10. This sweeper 10 has a chassis 12. On the chassis 12, a rear wheel 14 and a front wheel 15 is arranged. The front wheel device 15 includes one or more front wheels. The one or more front wheels are steerable via a steering device 16 with a steering wheel 18.

On the chassis 12, a cover 20 (housing cover) is arranged, which covers an engine compartment 22.

On the lid 20, a driver's seat 24 is arranged.

In one embodiment, the lid 20 is pivotally supported on the chassis 12. A corresponding articulation device 26 is arranged in the region of the rear wheel device 14. Over these, the lid 20 can be folded away in a direction 28 to allow access to the engine compartment 22. Further, by the folding away (opening) of the lid 20, as will be described in more detail below, allows access to a receiving device 30 for a filter system.

The direction 28 is opposite to a forward direction of travel of the sweeper 10. In the unfolded position of the lid 20 (FIG. FIGS. 1 and 2 ), in the embodiment, the lid 20 is pivoted beyond a rear side 32 of the sweeper 10 also. It is also possible in principle that the cover 20 is placed on and secured with a closure or is hinged for example at the front.

The driver's seat 24 is fixedly arranged on the cover 20, so that it is pivotable with the cover 20.

In the engine compartment 22, a motor 34 for driving the sweeper 10 is positioned. The engine 34 is, for example, an internal combustion engine or an electric motor. About him in particular the rear wheel 14 is driven directly.

Further, in the engine compartment 22, a suction fan device 36 is arranged, which comprises a drive motor which drives a suction unit. The drive motor may be an internal combustion engine or electric motor. The suction unit can also be driven by the motor 34.

On the chassis 12 of the sweeper 10, a hopper 38 is arranged. This hopper is in particular releasably held on an underside of the chassis 12. It is preferably positioned between the rear wheel 14 and the front wheel 15. The sweepings container 38 is a sweeping roller 40 ( FIG. 3 ), which is arranged on the underside of the chassis 12. The hopper 38 is used in particular for receiving coarse debris, which is received by means of the sweeping roller 40 from a floor surface to be cleaned.

The sweeping roller 40 is driven to rotate about a rotation axis. The drive is via a corresponding engine such as an internal combustion engine or electric motor. The drive can also be done via the motor 34. The sweeping roller 40 is arranged in one embodiment between the front wheel 15 and the hopper 38 on the underside of the chassis 12. The axis of rotation is when the sweeper 10 is placed on a relative to the direction of gravity g horizontal pad, a horizontal axis of rotation.

The sweeper 10 comprises in addition to the sweeping roller 40 one or more disc brushes 42. Such a disc brush 42 is arranged in particular in the region of the front wheel device 15 on the underside of the chassis 12. A disc brush 42 is driven by a corresponding drive in a rotational movement. A corresponding axis of rotation is based on the direction of gravity g at least approximately vertically, that is, when the sweeper 10 rests on a relative to the direction of gravity g horizontal pad, then the corresponding axis of rotation of a disc brush 42 is parallel to the direction of gravity or lies in a small acute angle (For example, less than 30 °) to the direction of gravity g.

On the chassis 12, a suction duct 44 is arranged ( FIG. 3 ). The suction chute 44 is positioned so that on the one hand coarse debris can be conveyed via the sweeping roller 40 directly into the hopper 38 and to other finer dirt or finer dirt on the substrate via the suction duct 44 is sucked. The corresponding suction (under) pressure is produced via the suction fan 36, which is in fluid-effective connection with the suction duct 44.

The suction duct 44 is arranged in the embodiment shown with respect to the direction of gravity g below the receiving device 30 and in particular directly below. (If the sweeper 10 rests on a horizontal surface, then a vector parallel to the direction of gravity g, which passes through the receiving device 30, pierces the suction shaft 44 at least in a partial area.)

The sweepings container 38 is also located below the receiving device 30 with respect to the direction of gravity g and in particular directly below.

The receiving device 30 is, when the lid 20 is closed, below the driver's seat 24 (relative to the direction of gravity g) arranged. In particular, the receiving device 30 is arranged directly below the driver's seat 24.

The receiving device 30 has a "dirt port" 46, which is in direct fluid-effective contact with the suction duct 44. Furthermore, the receiving device 30 has a "clean connection" 48 which is connected in direct fluid-effective contact with the suction fan device 36 (this connection is in the FIGS. 1 and 2 Not shown). Between the clean port 48 and the dirt port 46, the filter device is arranged.

The receiving device 30 is formed trough-shaped. It has a boundary wall 50 which defines an interior 52. In the embodiment, this interior 52 is at least approximately cuboid. The boundary wall 50 comprises a boundary floor 54. Through this boundary floor 54 of the suction duct 44 is performed or it comprises (at least) an opening to which the suction duct 44 is connected.

The boundary floor 54 provides the dirt port 46.

In the embodiment, a suction channel 56 is guided by the boundary wall 50. This suction channel 56 has as the first orifice the clean connection 58. In particular, the clean connection 48 faces the engine compartment 22 with the suction blower device 36. The suction channel 56 has a second orifice 58 (FIG. FIG. 3 ), which has in the interior 52 of the receiving device 30.

The receiving device 30 is basically designed so that a cartridge filter can be inserted into it as an alternative.

A cartridge filter has in particular a ring-cylindrical shape; in cross section, it is annular. A cylindrical outer side of the cartridge filter represents a dirty side of the cartridge filter. A cylindrical inner side represents a clean side of the cartridge filter. Filter material lies between the outer side and the inner side and is configured, for example, in the form of a flat pleated filter. Dust-laden air flowing from the outside to the inside is cleaned by the cartridge filter.

The inside of the cartridge filter with the clean side is provided for connection to the second orifice 58 on the receiving device 30. The outside, when the cartridge filter is mounted on the receiver 30, covers the dirty port 46 so that dust-laden air drawn in via the suction duct 44 must pass completely through an area of the outside of the cartridge filter and be filtered accordingly. The receiving device 30 is designed to receive a filter system module 60. This filter system module 60 is designed so that it as Independent module to the receiving device 30 both mechanically and with respect to further functional connections (in particular flow guidance) can be connected.

This results in the basic possibility of operating the sweeper 10 alternatively with a cartridge filter or the filter system module 60.

The filter system module 60 ( FIGS. 4 to 8 ) is designed as a pressure vessel 62. It comprises a housing 64, on which a cover 66 is seated. Through the housing 64 is a housing interior 68 ( FIGS. 5 to 8 ), wherein this housing interior space 68 can be closed in a fluid-tight manner via the cover 66. The housing 64 comprises a boundary wall 70, with boundary walls which project transversely and in particular perpendicularly on a housing bottom 72.

In the embodiment, the boundary walls of the boundary wall 70 are integrally connected to the housing bottom 72.

At the boundary wall 70 is spaced from the housing bottom 72, a flange 74 is arranged. This flange 74 is in particular circumferential. The flange 74 defines a wall, which is transverse and in particular perpendicular to the boundary wall 70 and thereby oriented at least approximately parallel to the housing bottom 72. The housing 64 has a trough-shaped form.

In the housing bottom 72 (at least) a recess 76 is arranged. About this recess 76 is (at least) a filter 78 can be positioned.

The filter 78 in particular has a rectangular cross-section and is designed, for example, as a flat-fold filter. The filter 78 has a dirty side 80 and a clean side 82. The clean side 82 is the housing interior 68 facing. The dirty side 80 faces away from the housing interior 68 and protrudes into the suction duct 44 or is connected to it directly in a fluid-effective manner.

The filter 78 has a holder 84 on which the filter material sits. This holder 84 is formed for example as a frame. About the holder 84, the filter 78 is inserted into the recess 76 of the housing bottom 72. For this purpose, a boundary wall 86 of the recess 76 is stepped on the housing bottom 72; the boundary wall 86 provides a support surface 88 for the holder 84 of the filter 78 at the recess 76. This support surface 88 is oriented at least approximately parallel to a housing bottom inner surface 90, which bounds the housing interior 68 on the housing bottom 72.

The boundary wall 86 further has transverse to this support surface 88 and spaced transverse surfaces 92a, 92b.

The filter 78 can be immersed through the recess 76 from above, that is to say from the housing interior 68. The holder 84 can be placed on the support surface 88.

Between the boundary wall 86 and the filter 78, a seal 94 is arranged. The seal is arranged in particular on the transverse surface 92a and / or the transverse surface 92b or contacts the transverse surface 92a or 92b. The seal 94 may be disposed on the filter 78 and / or the housing bottom 72.

It contacts the filter 78 on a lateral side 96 between the dirty side 80 and the clean side 82.

Through the seal 94, a fluid seal is achieved at the recess 76 between the filter 78 and the boundary wall 86.

The arrangement of the seal 94 as a "radial seal" on which the filter 78 is not placed, but a contact on the lateral side 96 takes place, gives a certain play when inserting the filter 78 in the housing bottom 72, wherein the sealing effect is achieved.

On the housing bottom 72, the housing interior 68 facing wells (recesses) 98 (see. FIG. 7 ) educated. A trough 98 is open laterally to the recess 76. Such a depression 98, over which the filter 78 protrudes in particular with the holder 94, facilitates the removal of the filter 78 or the insertion into the recess 76.

In particular, the seal 94 is arranged to extend beneath the troughs 98 so that the sealing path through the troughs 98 is not interrupted.

The cover 66 is held by a hinge device 100 on the housing 64 and in particular a region of the flange 74. This region of the flange 74 is in particular the region of a head side of the housing 64; in a rectangular cross-section of the housing 64 has this two parallel longitudinal sides and transversely and in particular perpendicular thereto spaced parallel short sides.

About the hinge device 100, the lid 66 is pivotally supported on the housing 64. A pivot axis 102 is oriented at least approximately parallel to the housing bottom 72.

In the FIGS. 1 . 4 . 5 and 6 closed positions of the lid 66 are shown. In the Figures 2 . 7 . 8th open positions of the lid 66 are shown.

In an open position of the lid 66, the housing interior 68 can be accessed and the filter 78 can be exchanged.

The housing 64 and the cover 66 is associated with a positioning device 104. Due to the positioning device 104, the cover 66 can be held in a specific pivoting position relative to the housing 64. In such a held position, for example, the lid 66 is pivoted to the housing 64 in the range between 45 ° and 90 °. (In the embodiment shown, this pivot angle is approximately 60 °.)

The positioning device comprises, for example, a rod 106, which is pivotally mounted on the housing 64 and in particular a region of the flange 74. For this purpose, the rod 106 is formed as an angle element. The region of the flange 74, on which the rod 106 is pivotally mounted, is located on a short side and the region, on which the hinge device 100 is arranged.

The cover 66 has a recess 108 into which the rod can be inserted.

When opening the lid 66 is folded up and then the rod 106 unfolded. The lid is folded up so far that the rod 106 can be inserted into the recess 108. By a slight swinging back the corresponding position is secured.

When the lid 66 is closed, the rod 106 abuts a portion of the flange 74 which is disposed on a longitudinal side of the housing 64.

It may be provided that a receptacle 110 is provided for the rod 106 at this flange portion, wherein this receptacle 110, for example, has one or more holders for the rod 106 and / or comprises a recess into which the rod 106 can be inserted.

The cover 66 has a peripheral region 112, which is adapted to the flange 74 and over which the cover 66 can be supported on the flange 74.

This area 112 is associated with a seal 114. The seal 114 is disposed on the region 112. It is also possible that this is alternatively or additionally arranged on the flange 74. By means of the seal 114, the housing interior 68 can be closed in a fluid-tight manner via the cover 66.

To produce a secure closed position of the cover 66 on the housing 64, a closure device 116 is provided. This closure device 116 comprises in particular spring-loaded screws 118a. A spring-loaded screw 118a is arranged in particular on a head side of the lid 66.

About the closure device 116 can be a positive connection in the housing 64 determine. In particular, screws of the closure device 116 engage the flange 74. As a result, the cover 66 can be pressed with its portion 112 against the flange 74 with intermediate seal 114 and secure the fluid-tight closed position.

The filter system module 60 has a vacuum region 120 and an overpressure region 122 (see, for example, FIG FIG. 6 ). The negative pressure region is formed over the housing interior 68. He is fluid-tightly separated from the overpressure region 122. The overpressure area 122 is formed in the lid 66. The cover 66 thereby forms the actual pressure vessel of the pressure vessel 62.

At the boundary wall 70, a port 124 is arranged ( FIG. 7 ) which is in direct fluid communication with the suction fan 36 when the filter system module 60 is mounted on the sweeper 10. In particular, the connection 124 can be connected to the second opening 58 of the suction channel 56 on the receiving device 30.

The connection 124 leads into the housing interior 68.

The overpressure region 122 is closed by a (first) container wall 126 and by a second container wall 128. Between the first container wall 126 and the second container wall 128 a pressurizable space is formed.

At the second container wall 128 (at least) a connection 130 is arranged for compressed air. Compressed air for pressure loading of the overpressure region 122 is provided by a compressor device 132 (in FIG FIG. 1 shown without compressed air line). The compressor device 132 may be arranged in the engine compartment 22. But it can also be connected directly to the filter system module 60.

Furthermore, one or more electrical connections 134 are arranged on the second container wall 128. Such a connection 134 has, for example, a cable gland. An electrical power supply can be coupled via a connection 134 and / or control signals can be coupled in.

The second container wall 128 is an "outer" wall of the lid 66.

For example, the second container wall 128 is configured to include a recessed central region 136. In this recessed central region 136, the distance to the first container wall 126 is smaller than outside this middle region 136.

The first container wall 126 forms a partition wall to the vacuum region 120.

The first container wall 126 and the second container wall 128 are fixedly connected to each other. In particular, at a junction 138 of first container wall 126 with the second container wall 128, a seal 140 is arranged.

As mentioned above, the overpressure region 122 can be pressurized. A typical volume of the overpressure region 122 is about 7.5 I. A typical pressure loadability is 300 mbar.

The region 112 is seated in particular on the second container wall 128. The first container wall 126 points toward the housing bottom 72 and the clean side 82 of the filter 78.

On the cover 66, a hold-down device 142 is arranged. This sits in particular on the first container wall 126 and protrudes beyond this in the direction of the filter 78th

When the lid 66 is closed, the hold-down device 142 seats on the filter 78 and in particular on the holder 84 of the filter 78. The hold-down device 142 is dimensioned in relation to the lid 66 so that when the lid 66 is closed, it presses the filter 78 against the support surface 88. By the hold-down device 142 is thereby provided for an axial fixation of the filter 78. The filter 78 can be inserted loosely. By the support surface 88 to one side and by the hold-down device 142 to the other direction, the filter 78 is then secured in the closed filter system module 60.

The hold-down device 142 has for this purpose a support element 144, which is positioned at a distance from the first container wall 126 via a corresponding holder 146. The support member 144 is provided with through recesses to allow a flow passage.

The filter 78 defines on the clean side 82 a filter plane. The hold-down device 142 presses with the support element 144 on this filter level.

The filter system module 60 has a filter cleaning device 148. This filter cleaning device 148 is arranged on the cover 66. The filter cleaning device 148 comprises (at least) an external air valve 150. The filter 38 can be acted upon by the external air valve with compressed air, which is stored in the overpressure region 122, from the clean side 82 in order to dissolve dust adhesions. In particular, pressure pulses for cleaning the filter 78 can be provided via the external air valve 150. The pressurization of the filter 78 for cleaning can be done in particular controlled. For example, a temporal control (compressed air pulses at certain intervals) and / or a sensory control is possible. In a sensory control, for example, a filter passage is determined directly or indirectly, and if necessary (if, for example, the filter passage moves below a threshold) an automatic cleaning is carried out. It is also possible that a cleaning process by a user of the sweeper 10 is initiated manually.

In the embodiment, the external air valve 150 is fixed to the first container wall 126. It may be provided that the external air valve 150 is also fixed to the second container wall 128.

The external air valve 150 has a valve disk 152. This valve disk is pressed by a closing spring 154 in the direction of a closed position, wherein in the closed position, an external air opening 156 in the first container wall 126 is closed in a fluid-tight manner. In this closed position, the overpressure region 122 can be charged via the compressor device 132 with compressed air.

In the exemplary embodiment, the closing spring 154, which is, for example, helical, is supported on an inner side of the support element 144.

In the embodiment, the closing spring 154 is relaxed in the closed position of the valve disk 152. The closing spring 154 is tensioned when the valve disk 152 transitions from its closed position into its open position. In its closed position, the valve disk 152 is held by an electromagnet 158. For this purpose, the electromagnet 158 is acted on by a control unit of the sweeper 10 with an exciter current. When the excitation current is interrupted, the valve disk 152 is automatically transferred to its open position due to the overpressure acting on it in the overpressure region 122, in which it is at a distance from the external air opening 156. The interruption of the exciter current can be controlled accordingly.

In the open position of the valve disk 152, external air (compressed air) can flow out of the overpressure region 122.

The closing spring 154 then then returns the valve disk 152 back to its closed position, in which it is then held under the action of the electromagnet 158, which is again charged with exciting current.

By brief interruption of the exciting current of the electromagnet 158 thus a compressed air Abreinigungsimpuls be triggered, which can escape from the overpressure region 122.

The filter 78 is mechanically shaken by the one or more pressure pulses and thereby cleaned. At the same time, part of the outside air flows through the filter 78 against the direction of flow prevailing during normal suction operation (at the dirty side 80 to the clean side 82). This enhances filter cleaning.

In the embodiment, a baffle is arranged in the suction duct 44. This is positioned so that a pressure pulse hits it and is reflected back to the filter 78.

The filter system module 60 is adapted in its external dimensions so that it is mechanically fixable to the receiving device 30. In particular, the receiving device 30 and the filter system module 60 are adapted to each other so that it is held in a form-fitting manner in the receiving device 30.

The filter system module has the connection 124 as a suction connection. This is fluidly connected to the suction fan 36.

The dirty side 80 of the filter 78 forms a "dirt suction port" of the filter system module 60. The dirty side 80 of the filter 78 is, when the filter system module 60 is arranged in the receiving device 30, directly fluidly connected to the suction duct 44.

Via the port 130 for compressed air, the overpressure region 122 can be loaded with compressed air, so that a compressed air reservoir is formed to provide pressure pulses for the filter cleaning. About the one or more ports 134, the compressed air loading of the filter 78 can be controlled or the solenoid 158 is supplied with electrical energy.

The filter system module 60 forms a unit that can be handled as a whole, which can be used on the receiving device 30, in particular as an alternative to a cartridge filter. The filter system module 60 has the necessary connections (in particular suction connection 124 and connection 130 for compressed air) in order, on the one hand, to permit suction operation of the sweeper 10 and, on the other hand, to carry out a particularly controlled filter cleaning. Furthermore, it has the connection (s) 134 in order to actuate the filter cleaning device 148 and in particular to be able to actuate it in a controlled manner.

The filter system module 60 is in particular independent of the sweeper 10 in the sense that it is a unit that can be handled independently as a whole. No housing parts and the like of the sweeping machine 10 are needed to provide a closed overpressure area 122.

The filter cleaning device 148 is fixed to the cover 66 and fixed in particular to the first container wall 126 and the second container wall 128. As a result, for example, strong compressed air pulses can be generated, so as to enable effective filter cleaning.

• In einem Kehrbetrieb ist der Motorraum 22 über den Deckel 20 geschlossen.
• Die Kehrwalze 40 kehrt Grobschmutz in den Kehrgutbehälter 38. Staubhaltige Luft wird über die Sauggebläseeinrichtung 36 eingesaugt und der Filtereinrichtung zugeführt. Wenn das Filtersystemmodul 60 in der Aufnahmeeinrichtung 30 eingesetzt ist, dann ist die Schmutzseite 80 des Filters 78 dieser staubhaltigen Luft ausgesetzt. Diese wird durch das Filter 78 gereinigt. An der Reinseite 82 ist der Staubgehalt der eingesaugten Luft erheblich verringert gegenüber dem Staubgehalt an der Schmutzseite 80. Durch eine manuelle oder automatische Filterabreinigung über die Filterabreinigungseinrichtung 148 lässt sich der Filter 78 vom Staub befreien; Staub, welcher sich insbesondere zu großen Teilen an der Schmutzseite 80 des Filters 78 abgesetzt hat, wird über entsprechende Druckluftimpulse entfernt. Dadurch wiederum wird die Saugleistung erhöht.

The sweeper 10 works as follows:

• In a sweeping operation, the engine compartment 22 is closed via the cover 20.
• The sweeping roller 40 returns coarse dirt into the hopper 38. Dust-laden air is sucked in via the suction fan 36 and fed to the filter device. When the filter system module 60 is inserted in the receiver 30, the dirty side 80 of the filter 78 is exposed to this dusty air. This is cleaned by the filter 78. On the clean side 82, the dust content of the sucked air is significantly reduced compared to the dust content on the dirty side 80. By a manual or automatic filter cleaning on the filter cleaning device 148, the filter 78 can be free of dust; Dust, which has settled in particular to a large extent on the dirty side 80 of the filter 78 is removed via appropriate compressed air pulses. This in turn increases the suction power.

When the lid 20, as in the FIGS. 1 and 2 is folded away, then both the engine compartment 22 and the filter system 60 can be accessed.

The lid 66 of the filter system module 60 can be opened and a corresponding folding position can be secured via the positioning device 104 (see. FIG. 2 ). In particular, this open position of the lid 66 can also be achieved and secured when the filter system module 60 is fixed in the receiving device 30.

It can then be accessed on the filter 78 and this can be easily replaced. In particular, this can be tool-free can be taken out and a new filter can be used. Subsequently, the lid 66 is closed again and it is achieved by the hold-down device 142 at the same time an axial fixation of the filter 78.

With appropriate training of connection lines to the terminals 130 and 134 while this need not be solved.

It is advantageous in this connection if the connections 130, 134 are arranged on a region of the cover 66 which is arranged on or in the vicinity of the hinge device 100.

Alternatively, a cartridge filter can be inserted into the receiving device 30.

Due to the modular design of the filter system module 60, an adaptation to different machine conditions or applications is possible.

In a further embodiment of a filter system module 160, which in the Figures 9 and 10 As shown, this includes a plurality of filters 162a, 162b. The filters 162a, 162b are arranged on the housing bottom 72 as described above in connection with the filter system module 60.

There are the corresponding filters 162a, 162b associated down device 164a, 164b provided.

In particular, each filter 162a, 162b is associated with its own external air valve 166a, 166b in order to perform an effective cleaning of the corresponding filter 162a, 162b.

Otherwise, the filter system module 160 is constructed in the same way as the filter system module 60.

It can also be provided more than two filters.

This results in an optimized adaptability to the suction system of the sweeping machine 10. If, for example, a plurality of suction shafts are provided or a suction duct specifies several separate suction channels, then can be achieved by the filter system module 60 or 160 in a simple manner an adjustment.

LIST OF REFERENCE NUMBERS

10

sweeper

12

chassis

14

rear facility

15

front facility

16

steering device

18

steering wheel

20

cover

22

engine compartment

24

driver's seat

26

Anlenkungseinrichtung

28

direction

30

recording device

32

back

34

engine

36

Sauggebläseeinrichtung

38

hopper

40

broom

42

Circular brush

44

extraction well

46

"Dirt connection"

48

"Clean Port"

50

boundary wall

52

inner space

54

limitation floor

56

suction

58

Second estuary

60

Filter System Module

62

pressure vessel

64

casing

66

cover

68

Housing interior

70

boundary wall

72

caseback

74

flange

76

recess

78

filter

80

dirty side

82

clean side

84

holder

86

boundary wall

88

supporting

90

Housing bottom interior surface

92a

transverse surface

92b

transverse surface

94

poetry

96

lateral side

98

trough

100

hinge means

102

swivel axis

104

Aufstelleinrichtung

106

pole

108

recess

110

admission

112

Area

114

poetry

116

closure device

118a

Spring-loaded screw

120

Under pressure range

122

Overpressure range

124

connection

126

First container wall

128

Second container wall

130

Connection for compressed air

132

compressor device

134

connection

136

the central region

138

junction

140

poetry

142

Hold-down device

144

support element

146

bracket

148

Filterabreinigungseinrichtung

150

Foreign air valve

152

valve disc

154

closing spring

156

Foreign air opening

158

electromagnet

160

Filter System Module

162a

filter

162b

filter

164a

Stripper plate

164b

Stripper plate

166a

Foreign air valve

166b

Foreign air valve

G

The direction of gravity

Claims (15)

1. A self-propelled floor cleaning machine (10), comprising a chassis (12), a suction fan device (36), a filter device, which is connected upstream of the suction fan device (36) in an airflow path, and a receiving device (30), arranged on the chassis (12), for at least one filter system module (60; 160) of the filter device;
   wherein the at least one filter system module (60; 160) is fixed, or may be fixed, as a whole on the receiving device (30), the at least one filter system module (60; 160) comprises at least one pressure container (62), a filter dedusting device (148), at least one filter (78; 162a, 162b) and one or more connections (124; 130; 134),
   and the connection(s) comprise one or more of the following connection types: compressed-air connection (130), suction connection (124), supply connection (134) for electrical power and signal connection (134).
2. A floor cleaning machine according to Claim 1, characterised in that the at least one filter system module (60; 160) comprises a compressor device (132) and/or a compressed-air connection (130) for establishing fluidically effective communication with a/the compressor device (132), and in particular in that the compressor device (132) is arranged on the chassis (12).
3. A floor cleaning machine according to one of the preceding claims, characterised in that the receiving device (30) comprises at least one receiving trough into which the at least one filter system module (60; 160) is inserted or may be releasably inserted.
4. A floor cleaning machine according to one of the preceding claims, characterised in that, when the floor cleaning machine is standing on a horizontal surface, the receiving device (30) and/or the at least one filter system module (60; 160) is arranged below, and in particular directly below, a driver's seat (24) in relation to the direction of gravity (g).
5. A floor cleaning machine according to one of the preceding claims, characterised in that, when the floor cleaning machine is positioned on a horizontal surface, the receiving device (30) and/or the at least one filter system module (60; 160) is arranged above, and in particular directly above, a debris container (38) and/or a brush roller (22) in relation to the direction of gravity (g).
6. A floor cleaning machine according to one of the preceding claims, characterised in that the filter dedusting device (148) is arranged in the pressure container (62), and in particular in that the filter dedusting device (148) comprises at least one external air valve (150) through which the at least one filter (78; 162a; 162b) may be acted upon by external air on the clean side for dedusting.
7. A floor cleaning machine according to one of the preceding claims, characterised in that the at least one pressure container (62) has a negative pressure region (120) and a positive pressure region (122), wherein the negative pressure region (120) and the positive pressure region (122) are separated from one another in fluid-tight manner, and in particular in that the negative pressure region (120) is in fluidically effective communication with the suction fan device (36), and in particular in that at least one compressed-air connection (130) is arranged in the positive pressure region (122), and in particular in that the at least one pressure container (62) has a pressure-container wall (126) as a dividing wall between the negative pressure region (120) and the positive pressure region (122), wherein, in particular, the pressure-container wall (126) is opposite a clean side (82) of the at least one filter (78; 162a; 162b), and in particular in that at least one external air valve (150) is arranged on the pressure-container wall (126).
8. A floor cleaning machine according to Claim 7, characterised in that the at least one pressure container (62) has a housing (64) and at least one cover (66) which closes the housing (64) in fluid-tight manner, wherein the at least one filter (78; 162a; 162b) is arranged on the housing (64) and in particular on a housing floor (72), and wherein, in particular, the housing (64) is constructed in the form of a trough;

   - and in particular characterised in that the at least one cover (66) is held on the housing (64) by way of a hinge device (100) and may be swung open with respect to the housing (64),

   - and in particular characterised in that at least one of the following elements is arranged on the at least one cover (66): a positive pressure region (122) of the at least one pressure container (62), a container wall (126) as a dividing wall between a positive pressure region (122) and a negative pressure region (120) of the at least one pressure container (62), a holding-down device (142) for the at least one filter (78; 162a; 162b), the filter dedusting device (148), and the connection(s) (124; 130; 134),

   - and in particular characterised in that a negative pressure region (120) of the pressure container (62) is arranged in the housing (64);

   - and in particular characterised by a positioning device (104) for the at least one cover (66), by means of which a swung-open position of the at least one cover (66) may be fixed with respect to the housing (64),

   - and in particular characterised by a seal (114) which is arranged on the at least one cover (66) and/or on the housing (64) and which ensures sealing between the at least one cover (66) and the housing (64),

   - and in particular characterised in that the housing (64) has, on the housing floor (72), at least one recess (76) in which the at least one filter (78; 162a; 162b) may be inserted,

   - and in particular characterised in that the housing floor (72) has, in the at least one recess (76), a supporting surface (88) for the at least one filter (78; 162a; 162b),

   - and in particular characterised in that a seal (94) is arranged between a delimiting wall (86) of the at least one recess (76) in the housing floor (72) and the at least one filter (78; 162a; 162b), wherein, in particular, the seal (94) abuts against a lateral side (96) of the at least one filter (78; 162a; 162b) and the lateral side (96) is located between a dirty side (80) and the clean side (82).
9. A floor cleaning machine according to Claim 8, characterised by a spring-loaded closure device (116) for holding the at least one cover (66) on the housing (64) in a closed position.
10. A floor cleaning machine according to Claim 8 or 9, characterised in that one or more depressions (98), which are open towards the at least one recess (76), are arranged on the housing floor (72).
11. A floor cleaning machine according to one of the preceding claims, characterised in that the pressure container (62) has a first pressure-container wall (126) as a dividing wall between a positive pressure region (122) and a negative pressure region (120) and at least one second pressure-container wall (128), which terminates the positive pressure region (122) in fluid-tight manner, wherein, in particular, the filter dedusting device (148) is fixed on the first pressure-container wall (126) and the second pressure-container wall (128).
12. A floor cleaning machine according to one of the preceding claims, characterised in that the receiving device (30) is designed for alternatively receiving at least one cartridge filter and, in particular, flow connections for a suction flow of the at least one cartridge filter may be used for the at least one filter system module (60; 160).
13. A floor cleaning machine according to one of the preceding claims, characterised in that the filter system module (60; 160) forms an autonomous unit which is independent from the rest of the floor cleaning machine and is mechanically connected to the chassis (12) by way of the receiving device (30), and which is functionally connected to the floor cleaning machine by way of the connections(s) (124, 130, 134) with regard to the suction flow and compressed-air flow and possibly the electrical power supply and/or the application of a signal.
14. A floor cleaning machine according to one of the preceding claims, characterised in that the at least one filter (78; 162a; 162b) in the at least one pressure container (62) may be replaced on the clean-space side.
15. A filter system module for a self-propelled floor cleaning machine (10), comprising at least one pressure container (62), a filter dedusting device (148), at least one filter (78; 162a; 162b) and one or more connections (124; 130; 134), wherein the filter system module may be handled as a unit, and wherein the connections(s) comprise one or more of the following connection types: compressed air connection (130), suction connection (124), supply connection (134) for electrical power and signal connection (134).

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