ES2658098T9 - Operating procedure for a dust aspirator, as well as an electric motor driven dust aspirator and a flexible tube-shaped filter material reserve - Google Patents

Description

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DESCRIPTION

Operating procedure of a dust aspirator, as well as dust aspirator driven by electric motor and reserve of filtering material in the form of a flexible tube.

The invention concerns, first of all, a method of operating a dust aspirator according to the features of the preamble of claim 1. Likewise, the invention concerns a dust aspirator powered by an electric motor according to the characteristics of the preamble of claim Four.

Procedures of the aforementioned class are known, such as especially in relation to the operation of electric motor driven dust vacuum cleaners, especially domestic dust vacuum cleaners. In this case, by establishing a suction air stream, the suction air charged with particles is filtered for filtration through the dust filter bag disposed in the dust aspirator, and this, according to one execution, as a result of a suction through the dust filter bag or as a result of insufflation of the suction air in the filter bag. After an eventual filling level, possibly also defined by the user, is reached, the filled dust filter bag is replaced by a new unused dust filter bag. These dust filter bags are presented ready-made and stored by the user. A change of the filter bag includes the removal of the full filter bag and the insertion of a new filter bag in the dust aspirator, and this is always done by the user.

EP 0 322 387 shows a dust aspirator with a reserve of flexible tube-shaped filter bags whose end section always serves as a dust bag. When a dust bag is full, a cover is opened, the bag is removed and the full dust bag and the next reserve section are sealed and separated from each other with the aid of sealing and cutting means provided in the vacuum cleaner. powder.

US 2,722,993 discloses a dust aspirator in which a strip of filter bags attached to each other is stored in a rolled form. Between the respective filter bags, a perforation line is provided that facilitates the separation of individual bags. The respective bag to be used is held with its open end in a retention device that surrounds an air inlet, while the remaining bags remain stored in rolled form. When the bag is full, it is removed, separated from the next bag in the perforation line and the next bag is held in the retention device. It is proposed to close the full bag, for example by folding.

Document US 2004/0168280 discloses a dust aspirator in which a reserve of flexible tube-shaped filter material is disposed whose end zone always forms a dust bag intended for use. Once the aforementioned end zone is filled, it is removed and its open end zone is introduced into an arrangement with a sealing element and a cutting element, where its open end is sealed, it is separated from the remaining filter material and its free end is sealed. For sealing, the filter material has an inner layer with a lower melting point that melts by means of the sealing element and is welded in this way.

Document DE 2 139 671 shows a dust aspirator with a cartridge that forms a dust collecting space. In a lower area of the cartridge is a dust bag in use position, while above it are stored more filter bags. Stored dust bags are requested by the force of a spring. By means of a changeable mechanism that can be operated from the outside, you can simultaneously project the used dust bag down and put a dust bag stored in the use position, advancing the remaining dust bags as a result of the solicitation force.

In view of the state of the art described above, the invention deals with the problem of favorably perfecting a procedure of the kind mentioned, especially with regard to improved handling. Likewise, the invention addresses the problem of indicating a dust aspirator constructed in a manner favorable to the advance movement of the filtering material.

This problem is solved with respect to the process with the object of claim 1 and with respect to the dust aspirator with the object of claim 4.

Regarding the procedure, it is hereby stated that the availability situation for the advance movement of a dust filter bag or of the filter material to form a dust filter bag is enabled in a time-controlled manner, controlled by pressure increase or controlled due to a decrease in pressure or is carried out based on a flow measurement.

With respect to the construction of the dust aspirator, it is stated that the availability situation for the advance movement of a filter bag or filter material to form a filter bag is enabled in a time-controlled manner, controlled by pressure increase or controlled due to a decrease in pressure or is carried out based on a flow measurement.

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A plurality of dust filter bag or a filter material to form a plurality of dust filter bags is stored in the dust vacuum. With the removal of a full dust filter bag, an advance movement of filter material is started to form an additional dust filter bag or an advance movement of a dust filter bag.

The advance movement is carried out in this case automatically after the removal of the full dust filter bag, and this is eventually started by a user intervention. The new dust filter bag or the partial section of the filter material that makes up the new dust filter bag is immediately moved from a storage position in the dust aspirator to the use position. The advance movement is carried out inside the dust vacuum, especially inside the dust vacuum housing. Separate storage of dust filter bags can be dispensed with. In this case, it is envisioned that the availability for the advance movement of a dust filter bag or of the filter material to form a dust filter bag can be started in a time-controlled manner.

The removal of a full dust filter bag necessarily involves a manual insertion of a new dust filter bag.

Internally the device is captured and recorded the time elapsed since the last change of the filter bag, and at the same time it is checked against a predetermined threshold time. In this case, only the operating time can be captured, that is, the time at which the dust aspirator is actively operated. As an alternative or in combination, the downtimes during the absence of operation can also be taken into account. An advance movement of a dust filter bag or a section of filter material to form a dust filter bag is eventually carried out, as a consequence of this execution, regardless of the degree of filling of the filter bag. In an alternative or combinatorial embodiment, the availability situation is enabled for the advance movement of a dust filter bag or the filter material to form a dust filter bag in a manner controlled by pressure increase or pressure decrease, and this correspondingly depending on the degree of filling of the dust filter bag, which can be determined by measuring the pressure increase or the pressure decrease. If the pressure drop exceeds, for example, a predetermined threshold value, then, preferably, the forward movement is automatically started after removal of the full dust filter bag. A combination is also preferred in this regard so that a start-up is carried out based on the decrease in pressure or the increase in pressure and in a temporarily controlled manner, depending on which predetermined maximum value is reached first. As an alternative or in combination, the availability situation for the advance movement is also enabled by a variation of the circulating flow, whose variation of flow is captured by a corresponding sensor. Start-up availability is indicated to the user in a run. This indication means at the same time the need for an extraction of the dust filter bag that must be performed by the user. Eventually, enabled by the user through an order, for example by pressing a button or closing a filter chamber released from the full dust filter bag, the next dust filter bag stored in the dust aspirator is advanced in a preferred embodiment or the filter material stored in the dust vacuum is readjusted to form a new dust filter bag.

In the case of filtering material in the dust aspirator, a bottom closure and / or an opening closure is preferably automatically made to make a bag with the stored filter material. This is done automatically in a run under a control performed by the dust aspirator, and this is based on preset parameters, such as duration of operation or pressure drop. As an alternative, the closure occurs by user intervention, and this after a time-dependent change signal and / or pressure drop. Thanks to the closure on the bottom side and / or on the opening side of the filter material made more preferably in the form of a flexible tube, the filled dust filter bag is preferably closed to extract it without dust and eventually the bottom of the section is formed of filtering material moving forward to make the next dust filter bag.

To close the bottom and / or the opening, the filter material is welded, beaten, held with a cord or sewn. Alternatively, a pressure closure can also be achieved by means of built-in pressure closures, a velcro closure, a twist or alternatively a high pressure closure of the consecutive material zones.

In another embodiment, a cut of the vacuum cleaner filter filled to separate it from the dust filter bag in advance movement formed is carried out in the course of the procedure, after a closure of the bottom and / or the opening to make the bag. by the filtering material. This separation is carried out in a preferred embodiment by cutting inside the dust aspirator and also by means of corresponding cutting elements on the side of the apparatus and alternatively by heat action. In addition, an alternative provides for a predefined rupture line in the form of a perforation line in the filter material which makes it possible to rupture the full dust filter bag for its extraction.

It is also preferred that the closure and / or the separation cut be carried out in the situation of absence of

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operation of the dust vacuum.

In the case of a preferred insufflation of the dust-laden air, the forward movement is effected substantially in the direction of the blowing flow; alternatively, it is also done in the opposite direction. In an embodiment with a filter material stored to form a dust filter bag, both the closure and a separation cut can also be made only after an at least partial advance movement of the filter material.

Regarding the dust aspirator, the same aspects that have been previously described in relation to the procedure are evidenced at the moment.

In a preferred embodiment, it is provided that, in order to carry out the forward movement, the additional dust filter bag - or the additional dust filter bags - or the filter material, and instead of the dust filter bag is stored, and this inside the dust aspirator, that is, in a manner associated with the area of use. The storage has been chosen so that, after an extraction or in the course of an extraction of the full dust filter bag, a next dust filter bag or a section of filter material is moved to form an additional dust filter bag out of the internal reserve tank to the device. In the case of the storage of individual ready-made dust filter bags, these are preferably stored in a warehouse, such as, for example, in the form of a pile of dust filter bags inside the dust aspirator, which are gradually spent in the course of filter bag changes due to the advance movement of individual dust filter bags. The advance movement of an additional dust filter bag or a section of filter material that serves to form an additional dust filter bag is started in a run by user intervention after removal of the full dust filter or in The course of this withdrawal. In this context, it is preferred that the dust filter bag or the filtering material be stored to perform the automatic feed movement, and this is started by a removal of the dust filter bag. The automatic feed movement is coupled in one embodiment to the removal of the full dust filter bag, for example in such a way that, through the full dust filter bag, the next dust filter bag or the material is still dragged filter that forms the next dust filter bag. Alternatively, the forward movement is not directly coupled to the withdrawal movement. Thus, in an exemplary embodiment, it is provided that the automatic feed movement is carried out after a dust filter bag is removed filled with a new operation of the dust aspirator. In this context, an embodiment is manifested as advantageous in which the forward movement of the dust filter bag or of the filtering material is carried out in a manner controlled by overpressure or depression, and this using the suction air stream established during the operation of the dust aspirator, which indirectly and preferably directly attacks the additional dust filter bag and more preferably attacks the section of filter material that forms the additional dust filter bag and moves this section towards The position of use of the dust filter bag. Thus, an aspiration or insufflation of the additional dust filter bag or the section of filter material into the filter space received by the now active dust filter bag can be achieved. In the case of filtering material in advance movement, it can also first fill the filter space only partially and then - preferably with a constant suction force - it can fill it completely, and in accordance with a release possibly limited in the time of the operating surface.

In an alternative, rather combinatorial embodiment, a means of movement provided in the dust aspirator and attacking in the additional dust filter bag or in the filtering material is provided for the advance movement. Therefore, for the advance movement a mechanical means can be activated, and this preferably in the course of a new operation of the dust aspirator after the removal of a full dust filter bag, the advance movement being started with the aid of the travel means after a user intervention, for example by actuating a corresponding or similar push-button or initiated by a signal from a dust suction side monitoring system that captures the non-existence of a filter bag of dust in the filter chamber. With respect to the means of displacement, it can be a clamp that seals as a hook or as a pincer the additional dust filter bag or the area of the filtering material that forms the additional dust filter bag to cause their displacement. In a further embodiment, a filiform traction cable is provided to pull the next dust filter bag or the filter material to the operating position.

It is also advantageous that, in order to carry out the advance movement, the additional dust filter bag or the filter material are guided on rails so that the advance movement is defined and preferably also the position of use of the dust filter bag or of the filtering material in advance movement.

Regardless of the execution chosen to achieve an advance movement of the additional dust filter bags or of the filter material, a respective sequential movement - seen from the observer - of removal of the dust filter bag and advance of said bag is achieved. dust filter

In the case of an intended filter material, it is stored as an endless material in the dust aspirator to make the bags and this also preferably with a flexible tube-shaped configuration. He

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Filter material is preferably here a hepa filter material or a non-woven filter material with usual filter properties corresponding to the dust filter bag. The endless filter material stored in the dust aspirator is advanced successively according to an extraction of the dust filter bag, so that a new dust filter bag formed on the basis of the material is adjusted each time in the filter chamber endless. With respect to a direction of the air inlet flow in the ready-made dust filter bag, the endless material has a length corresponding to a multiple of the length of the ready-made dust filter bag. Thus, the endless material is more preferably provided with a length corresponding to a value of 2 to 50 times and also a value of 5 to 20 times the length of a ready-made dust filter bag. The preparation of the bag in the case of filtering material is carried out in an execution by forming a bottom closure in the dust aspirator. The bottom of the bag thus formed is arranged in a preferred embodiment in front of the dust inlet opening of the ready-made dust filter bag, and thus also forms a roof in a preferred head-down arrangement of the dust filter bag in the vacuum cleaner. of dust In a more preferred embodiment of the filtering material in the form of a flexible tube, a bag is made by closing the bottom, inside the dust aspirator, which presents, for operation, only an opening towards the suction or blow fitting.

In addition, the bag is made by forming a closure of its opening in the dust vacuum. In a preferred embodiment, only one end of the section of filtering material advanced into the filter chamber is closed at the moment, due to the formation of the bottom closure, but through this end the area of the The opening associated with the blow or suction fitting is still connected to the filter material stored in the dust aspirator. To separate the active filter material section - active dust filter bag - and the corresponding filter material, a corresponding gasket is provided that prevents insufflated or suctioned dust into the reserve of filter material into the active filter material zone. Before removing the full dust filter bag or the full filter material section, the opening associated with the suction or blow fitting is closed. Thereafter, a closed bag is presented on all sides ready for its extraction.

The closure of the opening of the full dust filter bag is combined in a preferred embodiment with the closure of the bottom of the advancing moving filter material section to form the additional dust filter bag. Both closing processes are preferably carried out at the same time, so that with the closing of the old dust filter bag, the section of filtering material in advance movement is prepared at the same time to form an additional dust filter bag. As an alternative, the closing of the bottom of the filtering material in advance movement can also be carried out with temporary offset with respect to the closing of the opening of the full dust filter bag, and thus also, for example, in the course of a new setting in operation of the dust vacuum after removal of the full dust filter bag. As an alternative, it is also provided that, before a closure of the opening and / or the bottom, the filter material moves forward at least along a partial path.

The closure of the bottom and / or the opening can be established in a preferred embodiment by means of welding. For this purpose, activatable electric welding devices associated with the filter material are provided, for example, in the dust aspirator, as is known, for example, by so-called film welding apparatus. The filtering material is adjusted correspondingly for electric welding, preferably having opposite film sections that are joined together by welding. These areas of film suitable for the establishment of a weld joint are provided in a more preferred embodiment in regular length sections of the flexible tube-shaped filter material. In another embodiment these areas of film are formed only on the inner side of the bag, being, for example, laminated in these areas on the active circulating material as a filter, which produces the advantageous additional effect that in the areas to be closed, Especially when welding, no dust and dirt particles are deposited, which could lead to a lack of sealing of the closure.

In another alternative embodiment, the closure of the bottom and / or of the opening can be established by gluing, for which, for example, the filtering material, on the inner side of the wall of the closing areas, that is, on the surfaces of the filtering material facing each other, it is provided with an adhesive surface that can be activated in the course of closing. Thus, in this context, a heat activatable glue is applied by rolling, for example. Under the action of pressure and eventually heat, the closure of the bottom and / or the opening can be established.

Likewise, in another alternative embodiment, the closure of the bottom and / or the opening can be established by means of a snap closure or by tightening. To this end, interior surfaces that face each other are also prefabricated at preferably regular longitudinal intervals of the filtering material, as well as, for example, in the form of a plastic coating and also in the form of a plastic coating. hard which is also profiled so that a snap or pressure closure can be achieved. Thus, a linear tightening closure oriented transversely to the longitudinal extent of the filter material, such as those also used, for example, to close bags of film or the like, is more preferably provided.

As an alternative, the closure can also be established by means of a velcro closure, for which in defined areas of the filtering material are provided in opposite positions on the inner side of the wall some

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sailboat hook sections and sailboat loops. A cord connection or sewing can also be provided to establish the closure, and this eventually with intervention from the user.

The preparation of the bag is also carried out by cutting and separating the filter material after forming the bottom and / or opening closure, and thus also by cutting and separating the filled dust bag initially closed preferably in the area of the opening, more preferably at the same time after the closing of the section of filtering material in advance movement that forms the additional dust filter bag. The cutting and separation is carried out in the area between the closing of the opening of the full dust filter bag and the closing of the bottom of the advancing bag, after which the extraction of the filter bag can be carried out. full and closed dust on all sides.

The cutting and separation of the prepared dust filter bags can be achieved in an embodiment of the object of the invention by means of cutting edges, for which purpose corresponding cutting means are provided in the dust aspirator. In this case, they can be cutting blades or the like that can be activated, that is, they can be moved additionally to the cutting position, for example, tiltable, activating the cut according to the intervention of the user or automatically triggering it by the vacuum cleaner. of dust after closing, especially the dust filter bag filled.

In an alternative embodiment the cutting and separation of the prepared dust filter bags can be achieved by the action of heat and also, in an embodiment of the filter material, with a film section associated with the cutting and separation zone.

The cutting and separation of the prepared dust filter bags can also be achieved by rupture, for which, in a preferred embodiment, a weakening of rupture between the closure of the opening and the opening can be established in addition to the closure of the bottom and the opening. bottom closure. This weakening of rupture occurs preferably at the same time as the closure of the bottom and / or of the opening and also, for example, forming a rupture line punched by punching or punching.

The different pre-assembled dust filter bags or the filter material especially as a flexible tube are housed inside a cartridge in a more preferred embodiment. The inner contour of the cartridge is then adapted to the outer contour of the housed dust filter bags or of the filter material housed in the storage position, so that a displacement of the bag or the filter material is offset transversely to the extraction direction. The cartridge can also be formed directly by a partial area of the dust aspirator that can be opened to be equipped with new dust filter bags or with new filter material. In this regard, a cartridge insertable in a housing of the dust aspirator and which includes the dust filter bags or the filtering material is preferred. In this case, it is preferably a cartridge of a hard plastic material with, preferably also, a single opening to transfer a dust filter bag or a section of filtering material to the filter chamber on the side of the vacuum cleaner by forward movement. of dust

In a more preferred embodiment, the cartridge forms a partial surface of the suction or blow fitting. Thus, in the case of a filtering material housed, the cartridge is preferably traversed in the center by the suction or blowing fitting, which, as a consequence of this arrangement, passes through the filtering material in the form of a flexible tube, considered in its longitudinal extension, and flows into the side of the opening of the dust filter bag section of the filter material prepared for operation. The cartridge is designed for this purpose to pass through the fitting and, alternatively, it can also form an extension of the fitting, considered in the flow direction.

The filter material is located inside the cartridge in a form ready to be dragged or pushed, such as, for example, in the form of a roll with a roll axis disposed transversely to the longitudinal extension of the filter material. In a preferred embodiment the filter material is stored in pleated form and is correspondingly placed in accordion-shaped layers inside the cartridge. The dust filter bags that are presented individually, that is, pre-assembled, can also be stored correspondingly in pleated form inside the cartridge. In this way, a reduction in volume is achieved in comparison with the dust filter bag in use position, so that, with a relatively small volume of the cartridge, a large number of filter bags to be formed can be housed inside it.

The pleat is more preferably configured transversely to the longitudinal extent of the dust filter bag or filter material, and this, in the case of a uniform preferred distribution of the pleat, extends over the entire length of the dust filter bag or of the filtering material. In this case, a relatively large ratio of the inside diameter to the outside diameter of the filter material stored in the cartridge is thus more preferably provided to make a thin layer arrangement possible. The flexible tube-shaped execution of the filtering material and the pleating thereof have been chosen such that a section of a ready-made active dust filter bag that is shaped elongated and / or cylindrical and / or shaped is adjusted accordingly. elliptical form of revolution. A spherical shape configuration of the ready-made dust filter bag offers, as a result of the planned pleating, a flatter and wider arrangement in the cartridge compared to cylindrical dust filter bags, so that, considered in the sense of height of the cartridge, more filter bags can be stored

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of confectionable dust or more filter material with a longer length than in the case of, for example, uniformly cylindrical dust filter bags.

In order to compensate for the differences in diameter, longitudinal support sheets, that is, oriented in the longitudinal direction of the filtering material, may be provided for the formation of folds.

To discard the dust filter bag full and closed in its opening, the filter chamber that surrounds the dust filter bag must be opened by the user during operation. Alternatively, the filter chamber can be removed from the dust extractor together with the closed and separated dust filter bag, so that the possibility of discarding the full dust filter bag by tilting out of the filter chamber is enabled.

The housing cartridge of the individualized dust filter bags or of the filter material can be introduced or removed laterally in a corresponding housing of the dust aspirator. As an alternative, a rotating or folding unit of the dust aspirator is provided on which the cartridge sits through a suction or blowing channel of the dust aspirator. As a consequence of this, the cartridge is not contaminated during operation of the dust aspirator by the dust conducted through the fitting, so that the cartridge can be removed from the dust aspirator without carrying dust with it.

The flexible tube-shaped filter material is already uniformly prepared in one embodiment, considered throughout its length. As an alternative, an asymmetric oval shape is provided with narrowed interface areas with respect to the areas of the material that make up the bag section. Therefore, these interface zones are kept with their relatively small diameter to make the closure in the course of making the bags, so that in the course of the closure a formation of folds is not present in these areas or only present a negligible fold formation.

The housing filter space of the active dust filter bag has an oval shape in a preferred embodiment. This simplifies the closing process, in which the ends of the filtering material must be cleanly placed one above the other. Alternatively, the filter space can also have a spherical or cubic shape. In order to close the inlet opening of the active dust filter bag formed by the filtering material towards the flow channel when the dust aspirator is not operating, a closing gate is provided in an improvement of the object of the invention. This gate is applied tightly against the inlet opening of the flow channel when the dust aspirator is not in operation. In one embodiment, this closing gate is an integral part of the flow channel on the side of the dust extractor. As an alternative, the closing gate is foldably formed in the storage cartridge of the filter material, so that this gate is discarded at the same time that the cartridge is replaced.

A marking may also be provided indicating the near end of the reserve of the filter material in the cartridge. This marking may have a color code and eventually a numerical sequence that is reduced. Through the marking the user is shown a signal regarding the imminent cartridge change.

Next, the invention will be explained in more detail using the attached drawing, which represents only embodiments. They show:

Figure 1, in perspective representation, a dust aspirator with a suction blower and a filter chamber for receiving a dust filter bag;

Figure 2, a schematic sectional representation through the area of the filter chamber, illustrating the arrangement and configuration of a housing cartridge of a flexible tube-shaped filter material in a first embodiment, relative to the ready state to work;

Figure 3, a schematic representation corresponding to Figure 2, but concerning an intermediate position in the course of making a bag from the filter material;

Figure 4, the storage cartridge of the filter material in an individualized perspective view;

Figure 5, the flexible tube-shaped filter material in a partially extended perspective representation;

Figure 6, the cartridge in a second embodiment in perspective representation;

Figure 7, the section according to line VII-VII of Figure 6;

Figure 8, the cartridge in an exploded perspective view;

Figure 9, zone IX of Figure 7 in enlarged representation;

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Figure 10, a representation corresponding to Figure 9, concerning a gate position;

Figure 11, the cartridge in perspective representation and a housing section of the powder side received by the cartridge;

Figure 12, a representation corresponding to Figure 11, concerning the position of association of the cartridge with the housing section;

Figure 13, the section according to the cutting plane XIII of Figure 12;

Figure 14, a representation corresponding to Figure 12, but in a state ready for operation with a formed dust filter bag and with a filter chamber associated with the cartridge;

Figure 15, the section according to line XV-XV of Figure 14 with suppression of the filter chamber;

Figure 16, the sectional representation according to figure 15 in elevation, relative to the state ready for operation and also in the course of a bag making process;

Figure 17, Zone XVII of Figure 16 in a sectional representation;

Figure 18, the enlarged detail of zone XVIII of Figure 17;

Figure 19, a partial sectional representation of the cartridge seated in the housing area, of the filter chamber and of the formed dust filter bag, relative to the bag making position;

Figure 20, a consecutive representation of Figure 19 after the bag is made;

Figure 21, in individual representation, a closed dust filter bag;

Figure 22, a representation according to Figure XIV, concerning another embodiment;

Figure 23, the cut according to the cutting plane according to XXIII in Figure 22;

Figure 24, a fragment of a closed and closed dust filter bag, relative to an opening closure

in another embodiment;

Figure 25, in an enlarged representation, the opening or bottom closure of a dust filter bag made in another embodiment;

Figure 26, the pleated filter material in the form of a flexible tube in a vertical section, relative to the folded storage position in one embodiment;

Figure 27, in elevation, a ready-made filter bag formed from the filter material according to Figure 26;

Figure 28, a representation corresponding to Figure 26, but concerning another embodiment of the filter material; Y

Figure 29, the ready-made and closed dust filter bag resulting from the filter material according to figure 28.

It is represented and described first, with reference to FIG. 1, an electric motor driven dust vacuum 1, especially a domestic dust vacuum, which is realized as a hand-guided handle apparatus. This first features a base device 2 with a suction / blower unit 3, not shown in detail, which is operated by an electric motor. In the base apparatus 2 a filter chamber 4 is moored provided to receive the dust material sucked and tiltable downwards or removable from the base apparatus 2. In an alternative embodiment the filter chamber 4 can be opened to expose the dust filter bag 5 housed in filter chamber 4.

The power supply to the electric motor integrated in the base device 2 for the suction / blower unit 3 is carried out by means of an electric cable 6.

Likewise, the base apparatus 2 has a swan neck extension extending over the entire area of the filter chamber 4. In the area of the free end this extension forms a plug housing for a handle 7 of the vacuum cleaner dust 1. In the area of the free end of the handle, an actuating handle 8 is provided. It has an adjustment unit operable with the thumb in the form of a sliding switch by means of which the power of the suction unit can be adjusted. blower 3 housed in the base apparatus 2.

For the treatment of soils, the base apparatus 2 is connected rheotechnically with a preposed apparatus 9. This one

opening of the vacuum cleaner

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It can be a suction nozzle that has rotating brushes.

The suction port not shown in the above-mentioned apparatus 9 is connected rheotechnically with the dust filter bag 5 housed in the filter chamber 4, for which a flow channel not shown in detail passes through the base apparatus 2. This flow channel makes transition at its end to a blow fitting 10.

In the operating position, the dust filter bag 5 is placed inside the filter chamber 4 in the upside down position; consequently, an attack occurs from below the flow in the suction operating position.

The suction-blower unit 3 aspirates the air laden with particles through the flow channel and the blow fitting 10, passing through the dust filter bag 5 to filter the air. Accordingly, the suction / blower unit 3 is provided behind the dust filter bag 5, considered in the direction of air flow.

The dust filter bag 5 held in an availability position inside the filter chamber 4 is formed as a partial section of a filter material 11 made together in the form of a flexible tube to configure the dust aspirator 1 in a manner favorable to its driving. This material consists of a usual filter material, in particular a non-woven filter material or a hepa filter material and is presented without a retention plate in a flexible tube-shaped configuration. The length of the flexible tube of the filter material 11 corresponds to a multiple of the length of the dust filter bag 5 to be formed therewith, considered in the same direction of extension, and more preferably corresponds to an entire multiple of said bag, of so that the filter material 11 is suitable for progressively separating usable dust filter bags 5 from it.

Figures 2 to 5 show in schematic representation a first embodiment. By tilting the filter chamber 4 downwardly around a tilting axis x oriented transversely to the longitudinal extension of said chamber, the housing space for the dust filter bag 5 and the free end zone of the blow fitting can be exposed 10.

This fitting crosses a chassis roof 12 disposed on the side of said chassis and separating the base apparatus 2 from the filter chamber 4. The free opening 13 of the upwardly directed blow fitting is oriented in such a way that it is dented. in a plane with respect to the chassis roof 12 and is provided with a pivotable gate 14 for closing the fitting. This is kept in the open position in the operating position, that is, during the suction operation, by means of the suction air stream conducted through the blow fitting 10, and this against the force of a spring shown requesting the gate 14 for closing the fitting towards the closing position of the mouth.

The filtering material 11 is stored in a cartridge 15 associated with the blowing fitting 10. For this purpose, the filtering material 11 is folded in accordion fashion and is placed inside the cartridge 15. The accordion folding of the filtering material 11 is achieved by pleating, that is, by the formation of inner and outer folds 16, 17 that extend along the perimeter of the envelope side of the flexible tube and which are arranged with uniform distribution along the entire length of the filter material 11 (see figure 5).

The flexible tube-shaped filter material 11 of the first embodiment shown is provided with a constant diameter, considered throughout its length, that is to say that it is provided with a constant diameter with respect to the areas provided with the outer folds 16 as of a constant diameter of the areas provided with the inner folds 17, and this always with reference to the folded position inside the cartridge 15. A filtering material 11 is thus indicated as a flexible tube with a cylindrical shape as a whole and with a Circular cross-section, which varies in diameter when deployed to form a dust filter bag 5 and, in addition, can also have, as a result of unfolding, different cross sections throughout its length.

The contour of the cartridge is adapted in plan view, especially with respect to the inner contour, to the outer contour of the filtering material 11 piled up forming a stack, whereby the latter is placed inside the cartridge 15 so as not to be displaced at least in the plane of creased.

Accordingly, the cartridge 15 first has a peripheral wall 18 oriented transversely to the folding plane of the filter material 11. The height of this wall is determined by the height of the package of the folded filter material 11 placed in the position of first use.

A cartridge bottom 19 oriented parallel to the folding plane of the filter material 11 is centrally provided with an opening 20 adapted to the outer contour of the blow fitting. This opening 20 hugs on the inner side of the cartridge a cartridge sleeve 21 that extends over the entire height of the cartridge and runs coaxially to the wall 18 of the cartridge. This bushing ends, starting from the bottom 19 of the cartridge, in the plane of a cartridge roof 22 that runs parallel to the bottom 19 of the cartridge.

Radially following the end of the cartridge sleeve 21 turned towards the cartridge cover 22, this sleeve is embraced by an extraction opening 23 in the form of a circular crown for the filter material 11

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which crosses the roof 22 of the cartridge. Through this opening, the associated end of the filter material 11 in the form of a flexible tube is dragged towards the outer side of the cartridge, this end of the filter material being also welded to form a bottom closure 24. As an alternative, a glue or a cord fastener of the end of the filtering material is also provided.

To promote the advance movement of the filter material, a spring element may be provided, associated with the bottom 19 of the cartridge, requesting the filter material package in the direction of the extraction opening 23.

The section of the filter material 11 driven out of the cartridge 15 and provided with the bottom seal 24 covers the blow fitting 10, especially the mouth 13 of the blow fitting, thus limiting the filling space.

Associated with the extraction opening 23 on the side of the cartridge, peripheral lip seals 25 and 26 are also provided. Thus, an outer joint 25 is arranged associated with the radially outer edge of the extraction opening 23 and this with fixing to the roof 22 of the cartridge . This outer seal 25 is applied with its radially peripheral free sealing surface in the interior to the opposite outer surface of the wall of the filtering material 11 protruding from the cartridge 15. A radially inner seal 26, fixed to the sleeve 21 of the cartridge, acts in the area of the extraction opening 23 against the surface - facing inward - of the wall of the filter material 11 driven out of the cartridge 15.

The filter material 11 removed from the cartridge 15 and provided with the bottom closure 24 is fastened in a manner following the penetration into the extraction opening 23 in such a way that it is formed, with respect to the inner side of the wall of the filter material. 11, a penetration section 27 adapted to the diameter of the blow fitting 10. This is achieved by providing closing means 28 that act from outside on the filter material 11 and leave the penetration section 27 in the usual operating state of the vacuum cleaner. of powder 1, which are arranged in the embodiment schematically represented in displaceable form on the side of the chassis, that is, on the side of the base apparatus.

The cartridge 15 provided with the folded filter material 11 is arranged on the roof 12 of the chassis to equip the dust aspirator 1 in such a way that the blow fitting 10 passes through the cartridge 15 in the area of the bushing 21 of said cartridge. The closing gate 14 of the fitting then extends approximately in the plane of the roof 22 of the cartridge. After a return tilt of the filter chamber 4 towards the closed position of said chamber according to Figure 2, the dust aspirator 1 is ready for operation.

With the operation of the dust aspirator 1 after new equipment with a cartridge 15 filled with filter material 11, the suction air stream directed by the blow fitting 10 into the section of filter material that provides the closure at the bottom 24 and leaving the cartridge 15 firstly causes a placement of this area of the filtering material with dragging of the filtering material 11 out of the cartridge 15 to form a dust filter bag 5 that almost fills the filter space of the filter chamber 4. Alternatively, the formation of the dust filter bag 5 by dragging filter material 11 out of the cartridge 15 can also be carried out mechanically, such as, for example, by means of gripping or pulling elements entering action as a result of a detection of the non-presence of a dust filter bag 5 with connection of the dust aspirator 1.

The dust filter bag 5 thus made is inflated through the blow fitting 10 with air loaded with dust and dirt, whose air passes through the wall of air permeable filter material outwards. To this end, the blower unit 3 provided in the base apparatus 2 acts as a suction blower that operates through a flow channel 30 that crosses the roof 12 of the chassis and which is connected in terms of flow with the space intermediate 29 between the wall of the filter chamber and the wall of the dust bag.

The seals 25 and 26 provided in the area of the extraction opening 23 on the side of the cartridge prevent 15 particles of dust and dirt introduced through the blow fitting 10 into the dust filter bag 5 from entering the cartridge, so that the storage section of filter material placed inside the cartridge 15 is not contaminated.

The ready-made dust filter bag 5 formed by the endless filter material 11 in the filter chamber 4 acts as usual by separating dirt and dust.

Depending on the degree of filling detected in the bag, for example derived from a capture of the pressure drop, and also alternatively caused by a user intervention, the dust filter bag 5 formed by the filter material 11 in the filter chamber 4 it is separated, for disposal, from the filter material 11 still stored in the cartridge 15 and the latter material is prepared to form another dust filter bag 5.

To this end, a closure of the dust filter bag 5 formed and filled in the filter chamber 4 in the area opposite to the bottom closure 24 is performed, that is, turned towards the cartridge 15. This closure of the bag is preferably carried out by the action of the user, for example by a push button order, and this also, for example, after indicating a state of maximum filling detected in the bag. Through user intervention,

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they put the closing means 28 on the side of the dust aspirator, for example by electric motor or alternatively with the help of manually operated levers, in an operative position in which these means are moved radially inwards, with respect to the schematic embodiment shown, in the direction of the extension of the axis of the blow fitting that crosses the penetration section 27 of the dust filter bag 5 until it reaches a position in which the wall sections of the filter material of the penetration section 27 are located one over another (see figure 3). Accordingly, the closure means 28 act primarily as extension means for preparing a closure 31 of the opening of the ready-made dust filter bag 5.

The closing means 28 also serve to form the closure 31 of the opening and also also to form the closure 24 of the bottom of the area of the filter material enabled in the cartridge 15 for its advance movement and for this purpose have electrically metallic wires 32 contactables that are exposed to the filter material 11. Each closure means 28 has two metal wires 32 spaced apart from one another and disposed one above the other, the upper metal wires 32 serving to form the closure 31 of the opening of the filter bag. prepared powder 5 and serving the lower metal wires 32 to form the closure 24 of the bottom of the section of filter material suitable for being advanced.

By means of the metal wires 32 of the closing means 28, the respective welding closure can be achieved by exerting pressure. To this end, the filtering material 11 has a laminated plastic film in the penetrating section 27 on the side of the wall, that is to say, in the opposite consecutive areas in the closed position. with another as a result of the action of heat by means of electrically contactable metal wires 32.

The laminated plastic film sections are provided at regular longitudinal intervals of the endless filter material, whose intervals correspond to the length of a dust filter bag 5 to be made.

After production of the closure 31 of the opening of the side of the dust filter bag and of the closure 24 of the bottom for the section of protruding filter material for forward movement out of the cartridge 15, a cut of the closed filter bag 5 is made on all sides to separate it from the remaining section of the filter material 11 which is still stored in the cartridge 15, and this also in the area between the closure 31 of the opening and the closure 24 of the bottom. This separation cut is represented only schematically in the first embodiment symbolizing it by scissors. A constructive solution provides for an arrangement of scissor-like cutting blades that are mechanically placed, and possibly by an electric motor action, in a cutting position to completely section the filter material 11.

By making the filter chamber 4 tilt down around the tilt axis x, the filled and closed dust filter bag 5 is accessible for removal. After the closure of the filter chamber 4 and the new operation of the dust aspirator 1, the section of filtering material protruding from the cartridge 15 and covering the blow fitting 10 is moved to the interior of the filter chamber 4 for form a next bag filter bag 5 as a result of the application with suction air.

Figures 6 to 20 show an example constructive solution.

The storage cartridge 15 of the filter material 11 is presented in the form of a housing provided with revolution symmetry. This is provided with an external thread to screw the filter chamber 4.

The central bushing 21 of the cartridge that passes through the filter material 11 stored in folded form configures in the embodiment shown an axial extension of the blow fitting. For the sealing connection, the bushing 21 of the cartridge is provided with a peripheral gasket 33 that is turned towards the blow fitting 10 on the side of the base apparatus.

In addition, the closure gate 14 of the fitting is arranged in the embodiment represented by the mouth side of the sleeve 21 of the cartridge, so that this gate 14 contaminated by the operation of the dust aspirator is also changed in the course of A cartridge change.

A leg spring 24 attached to the sleeve 21 of the cartridge acts on the closing gate 14 in the direction of its closed position.

On the bottom side of the bottom 19 of the cartridge there are configured in this way some fastening means 35 as a cross-sectional shoe designed to cooperate with correspondingly shaped countermeasures in the roof area 12 of the chassis. These means are designed so as to make possible a lateral introduction of the cartridge 15 and also an immobilization in the association position.

The closing means 28 are an integral part of the replaceable cartridge 15 in the second embodiment. These are configured as respective semicircular ring-shaped elements in which the free ends of the ring are arranged on a common tilt axis and. This tilt axis and extends in

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orientation parallel to the bottom 19 of the cartridge, the closure means 28 also being oriented in the form of an annular segment in a starting position, that is, in a position of non-use, with an orientation parallel to the bottom 19 of the cartridge and with some distance axial of this one. The tilting stumps 36, which make up the axis and tilting and projecting radially outwardly from the free ends of the closing means 28, are guided radially outwardly by the wall 18 of the cartridge to establish a rotationally engaged coupling of the closing means 28 with the control levers 37 on the side of the chassis in the operating position of the cartridge. The control levers 37 are accessible for handling after the removal of the filter chamber 4 and the corresponding uncovering of the eventually filled dust filter bag 5 formed by the filter material 11.

By means of a tilting movement of the control levers 37, the closing means 28 in the form of circular crown segments is made to swing out of their position parallel to the bottom while moving the circular crown surfaces on the side of the means of Close towards each other. The latter, as can be seen in the detailed representation of Fig. 17, have corresponding electrically contactable metal wires 32 corresponding to the first embodiment to weld the penetration section 27 also preferably laminated here with a plastic film 47 in the inner side of the wall. In the embodiment shown, the metal wires 32 are always arranged in pairs associated with the bottom closure 24 to be produced and associated with the opening closure 31 to be produced, so that in the area of each closure there are two welding areas that run parallel one to another and they ensure closure.

The electrical contact of the metal wires 32 is achieved by means of the outwardly guided tilting stumps 36, which are connected in the support area of the control levers 37 on the side of the chassis with an electrical current supply on the side of the apparatus, for example in the form of contact contacts.

The closing means 28 also have in the area between the welding areas, to establish the bottom closure 24 and the opening closure 31, edges 38 oriented in opposite directions with respect to each other, which make the cutting of the dust filter bag 5 closed on the side of the opening to separate it from the area of the filter material that protrudes from the cartridge 15 and which serves to form the next dust filter bag 5.

In the exemplary embodiment, the edges 38 of the closing means 28 are partially provided along the peripheral length of the respective closing means 28, so that only a partial perforation of the filtering material is carried out by means of the edges 38 11. Accordingly, after the formation of the bottom closure 24 and the opening closure 31, a perforation 39 is established between the closure areas along which the user can separate the filled and sealed dust filter bag 5 by tearing along the perforation line. Figure 21 shows in perspective representation a dust filter bag 5 filled, closed on all sides and separated.

After the return movement of the closing means 28 to its base position parallel to the bottom and the arrangement of the filter chamber 4, a dust filter bag 5 is provided with a new start-up of the dust aspirator 1, and this by insufflation of the section of filter material closed from the bottom side into the filter chamber 4 by effect of the air current acting on said section.

The filter chamber 4 shown with respect to the second exemplary embodiment has an exit channel 40 of the chamber which is connected in the matter of air flow to the blower unit in opposite position and in imaginary extension. 3 on the side of the dust vacuum. To counteract a partial suction of the filter bag 5 structure in the filter chamber 4 into the outlet fitting 40, this fitting 40 is covered on the inner side by a sieve retaining element 41.

Figures 22 and 23 show an improvement of the second embodiment described above. The filter chamber 4 is provided here, on the inner side, of a support grid 42 of circular cylindrical shape to stabilize the shape of the structured dust filter bag 5 in the filter chamber 4. Along this grid of support 42 is guided on rails the dust filter bag to orient its position, to which end the dust filter bag 5 is provided with radially projecting stumps 43, for example in the area of the outer folds 16 and also, for example, in the areas established between two outer folds 16 spaced apart from each other. These stumps are arranged diametrically facing each other and fit into corresponding rails 44 of the retaining element 41 oriented perpendicularly to the bottom 19 of the cartridge (see Figure 23). The stumps 43 are configured in an improvement as axially directed ribs, that is, transverse to the folding plane, and are also formed in one piece and based on the same filtering material.

Figure 24 shows an alternative solution to close the bottom or to close the opening of the bag. A wrap around the area to be closed is provided here. The winding material 45 can be, for example, a wire or a metallic wire, and also, for example, a plastic clamp or the like.

Alternatively, the bottom closure 24 and / or the opening closure 31 can also be produced by means of a

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snap closure 46 (see figure 25). To this end, the closing zones provided regularly throughout the filter material 11 are made of a plastic material and this also, for example, by injection of the latter against the filter material, the surfaces facing each other presenting cavities and opposite projections which, considered in cross-section, can be assembled under pressure (arrows P) in the manner of a dovetail joint.

Figures 26 to 29 show two other exemplary embodiments of a storable filter material 11 that must be stored in a cartridge 15 to form confectionable dust filter bags 5, as well as a respective dust filter bag 5 individualized in the filter material 11 by closure. and separation from the rest of the storage of filter material.

Figures 26 and 27 show an embodiment in which a dust filter bag 5 substantially of circular cylindrical shape can be manufactured by confection. The vertical distances of the folds (outer folds 16 and inner folds 1) that extend peripherally transverse to the longitudinal extent of the dust filter bag 5 are uniform and are substantially extended with respect to the vertical distances of the folds in the storage position of filtering material according to figure 26.

The ratio of the inner diameter to the outer diameter in the storage position of the filter material 11, that is, also the ratio of the diameter of the inner folds 17 to the outer folds 16, has been chosen so large, taking into account the blow fitting 10 or the bushing 21 of the cartridge that centrally traverses the reserve of the filtering material, that a storage position with the lowest possible layer thickness is achieved, which has a favorable effect on the amount of storage inside the cartridge 15. Thus, for example, a ratio of inner diameter to outer diameter of 1: 1.2 to 1: 2.5 has been chosen, and also for example 1: 2.

Depending on the execution of the closures, for example by using a winding closure, the length of a dust filter bag 5 made of a filter material 11 according to Figure 26 can be adjusted individually, since they do not necessarily have to be shaped predefined closure zones in the filter material 11.

On the contrary, Figures 28 and 29 show an embodiment in which the closing and separation zones of the filter material 11 are defined and in which they are formed at uniform longitudinal intervals of the filter material 11. This is given, in addition, by the selected shape of the dust filter bag 5 to be manufactured based on the filter material 11. This is made as an oval with revolution symmetry or in the form of a sphere with bottom and opening closures 24, 31 diametrically opposed. This shape of the bag also requires an alternating reduction and enlargement of diameter, considered throughout the endless filtering material in the form of a flexible tube, so that in the elongated orientation of the endless filtering material a structure can be seen as a a string of pearls, defining partial sections of reduced diameter closing areas.

In the piled up state of the filtering material 11 in folded form for storage it is necessary, with approximately the same volume of the dust filter bag 5 based on it with respect to the embodiment according to figures 26 and 27, provides an extension of the outer diameter of the storage stack of filter material with respect to the cylindrical embodiment; on the contrary, the height of the stack has been reduced in comparison with the embodiment described above due to the engagement of the consecutive folding planes one inside the other.

The respective indicated numerical bandwidths also include - provided that they are not indicated in any way as an example - all intermediate values, and in particular are restricted especially in steps of 1/10 from the upper and / or lower limits to the other corresponding limit. The conjunction "and" means here that both limits are displaced, that is, they are delimited, each time in one or several tenths towards the limit.

List of reference symbols

1 dust vacuum

2 Basic device

3 Blower unit

4 Filter chamber

5 Dust filter bag

6 Electric cable

7 Mango

8 Drive handle

9 Applied device

10 Blow fitting

11 Filter material

12 Chassis roof

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P

x

Y

Mouth of the blow fitting Fitting closure of the fitting Cartridge

Outside folds Inside folds Cartridge wall Cartridge bottom Opening

Cartridge cap Cartridge roof Extraction opening Bottom seal Gasket Gasket

Penetration section Closing medium Intermediate space Flow channel Opening closure Metal wires Gasket

Leg spring Immobilization means Tilt stump Control lever Edges

Drilling

Outlet fitting

Retention element

Support grid

Stump

Lanes

Winding material Snap closure Plastic film Pressure

Tilt axis Tilt axis

Claims (15)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 1. Operating procedure of a dust aspirator (1) comprising a suction blower and a suction or blow fitting (10) leading to a first dust filter bag (5), in which a plurality of bags Dust filter (5) or a filter material (11) to form a plurality of dust filter bags (5) are stored in the dust aspirator (1) and with the extraction of a full dust filter bag (5) you starts an advance movement of the filter material (11) to form another dust filter bag (5) or an advance movement of a dust filter bag (5), characterized in that the availability situation for the advance movement of a dust filter bag (5) or of the filter material (11) to form a dust filter bag (5) is enabled in a controlled manner over time, is enabled in a controlled way by pressure increase or by pressure decrease or performed based on a flow measurement. 2. Method according to claim 1, characterized in that, in the case of filtering material (11) in the dust aspirator (1), a bottom and / or opening closure (24, 31) is automatically made to make bags with the stored filter material (11). 3. Method according to any of the preceding claims, characterized in that the forward movement of the other dust filter bag (5) or of the filter material (11) is carried out automatically, for example in a manner controlled by overpressure or depression, and / or with the aid of a displacement means that is provided in the dust aspirator (1) and that attacks in the other dust filter bag (5) or in the filtering material (11). 4. Powder vacuum (1) powered by an electric motor comprising a suction blower and a suction or blow fitting (10) leading to a first dust filter bag (5), in which in the dust vacuum (I) a filter material (11) suitable for forming one or more additional dust filter bags (5) is stored, possibly already in the form of a planned dust filter bag (5), to perform an automatic feed movement instead of the extracted dust filter bag (5), characterized in that the availability situation for the advance movement of a filter bag (5) or of the filter material (11) to form a filter bag (5) is enabled in a controlled manner over time, it is enabled in a controlled manner by pressure increase or pressure decrease or is performed based on a flow measurement. 5. Powder vacuum (1) driven by an electric motor according to claim 4, characterized in that the forward movement of the dust filter bag (5) or the filter material (11) is carried out in a controlled manner by overpressure or depression , because, in order to carry out the forward movement, a displacement means is provided arranged in the dust aspirator (1) and which attacks in the other dust filter bag (5) or in the filtering material (11), and by that, to carry out the forward movement, the other dust filter bag (5) or the filtering material (II) are guided on rails.
6. Powder vacuum (1) driven by electric motor according to any of claims 4 or 5, characterized in that, in the case of filtering material (11), an endless material intended for making bags in the dust aspirator (1) is stored.
7. Powder vacuum (1) driven by electric motor according to any of claims 4 to 6, characterized in that the bag making is carried out by forming a bottom closure (24) in the dust aspirator and / or an opening closure (31) in the dust aspirator (1).
8. Powder vacuum (1) driven by electric motor according to any of claims 4 to 7, characterized in that the making of bags is carried out by cutting and separating the filter material (11) after forming the bottom and / or opening closure (24, 31).
9. Powder vacuum (1) driven by electric motor according to any of claims 4 to 8, characterized in that the cutting and separation of the prepared dust filter bags (5) can be achieved by cutting and / or by heat action. 10. Powder vacuum (1) driven by an electric motor according to any of claims 4 to 9, characterized in that, in addition to the bottom and / or opening closure (24, 31), a weakening of rupture can occur. 11. Powder vacuum (1) driven by an electric motor according to any of claims 4 to 10, characterized in that the dust filter bags (5) or the filter material (11) are housed in a cartridge (15). 12. Powder vacuum (1) driven by an electric motor according to claim 11, characterized in that the cartridge (15) forms a partial surface of the suction or blow fitting (10). 13. Powder vacuum (1) driven by an electric motor according to any of claims 4 to 12, characterized in that the filter material (11) or the dust filter bags (5) are stored in pleated form. 14. Powder vacuum (1) driven by electric motor according to claim 13, characterized in that the pleated fifteen It is formed transversely to the longitudinal extension of the dust filter bag (5) or the filter material (11). 15. Powder vacuum (1) driven by an electric motor according to any of claims 13 or 14, characterized in that the pleat is formed with a uniform distribution along the entire dust bag (5) or the filter material (eleven).