DE102021129515A1 - Electrical device, in particular suction device or machine tool - Google Patents

Abstract

The invention relates to an electrical device, in particular in the form of a suction device (10) or a machine tool, with a housing (20) in which at least one electrical consumer, in particular an electric drive motor (11D), is arranged, the electrical device for electrical Power supply for the electrical consumer, in particular the drive motor (11D), has a power supply device (80) with an energy storage receptacle (81), in the interior of which there are at least two device interfaces (90A, 90B) for the detachable connection of one energy storage interface (190A , 190B) of an electrical energy store (170A, 170B), in particular a battery pack, are arranged. The device interfaces (90A, 90B) are arranged on opposite side walls (83, 84) of the energy store receptacle (81), so that the energy stores (170A, 170B) can be attached to the device interfaces (90A , 90B) can be arranged.

Description

The invention relates to an electrical device, e.g. in the form of a suction device or a machine tool and/or as a mobile electrical device, with a housing in which at least one electrical consumer, in particular a drive motor, is arranged, the electrical device for the electrical power supply of the electrical load, in particular the drive motor, has a power supply device with an energy storage receptacle, in the interior of which at least two device interfaces are arranged for the detachable connection of an energy storage interface of an electrical energy storage device, in particular a battery pack.

The energy stores are, for example, so-called battery packs, which can be detachably connected to the electrical device, e.g. the suction device or the machine tool, in particular a hand-held machine tool. In electrical devices of this type, in order to increase the mobility and/or the electrical power, it is necessary for several, for example two, such energy stores to be available for energy delivery at the same time. However, the electrical power density of rechargeable energy stores is still so low that they are relatively bulky. Accordingly, the energy store receptacle must have a large capacity so that the energy stores can still be grasped by an operator, for example to remove them from the energy store receptacle.

It is therefore the object of the present invention to provide an improved concept for arranging energy stores on a housing of, for example, a mobile or stationary electrical device of the type mentioned at the outset.

To solve the problem, an electrical device, in particular a suction device or a machine tool, of the type mentioned at the outset provides for the device interfaces to be arranged on opposite side walls of the energy store receptacle, so that the energy stores can be connected to the bottom walls facing one another on the Device interfaces can be arranged.

The advantage of such an arrangement can be seen in particular in the fact that the energy stores are arranged so to speak floor to floor or floor wall to floor wall, so that an area of the energy store receptacle extending next to the floor walls is available as an operating space for actuating or operating the energy store. It is true that the outlay for laying electrical lines to the device interfaces within the housing is greater. In contrast, however, there is a significantly increased ease of use.

The electrical device is advantageously a mobile electrical device. However, the invention can also readily be used in stationary electrical devices.

The electrical energy stores contain, for example, multiple battery cells. The battery cells are arranged next to one another in a row arrangement, for example, in a housing of the respective energy store. The battery cells are connected in series and/or in parallel with one another, for example.

The energy storage interfaces of the preferably mobile electrical device are connected, for example, in series or in parallel with one another, so that, for example, a supply voltage provided by the energy storage is added in a series connection. For example, if the energy storage interfaces are connected in parallel, the current available is higher.

Other energy stores can also be arranged without further ado at the energy store interface. The additional energy stores can likewise be held in or on the energy store interface with the bottom walls facing one another.

However, it is also possible for the electrical device, which is stationary or mobile, for example, to have energy storage interfaces that are not arranged on opposite side walls of the energy storage receptacle.

Furthermore, the electrical device can also have at least one additional energy store receptacle, in which energy store interfaces are provided, for example, which are arranged on opposite sides of a retaining wall of the energy store receptacle. The at least one energy store receptacle can also only have a single energy store interface for connecting a single energy store. The at least one additional energy store receiving channel can be configured as a receiving pocket, receiving compartment or the like.

If the electrical device is a mobile electrical device, it retains its mobility, so to speak, because it is not dependent on a network interface.

In the mobile or stationary electrical device are several energy storage, namely at least two energy stores available for a sufficient energy supply.

The electrical consumer is preferably an electric drive motor. However, as an electrical load, the electrical device can also include, for example, a charging interface for charging a further electrical energy store. For example, the housing has a housing interior in which the charging interface for charging the additional electrical energy store is arranged.

The machine tool is, for example, a sawing machine, milling machine or the like.

It is advantageously provided that the energy store receptacle has an insertion opening through which the energy store can be inserted into the energy store receptacle. An expansion of the insertion opening is preferably suitable for inserting an energy store into the energy store receptacle or removing it from the energy store receptacle, while the other energy store is arranged in the energy store receptacle. It is advantageous if the insertion opening is arranged on an outer wall of the housing.

In principle, it is conceivable that the energy storage receptacle has an opening on a side opposite the insertion opening, so that a type of passage is present, for example. Such a passage or a passage opening is suitable in particular for cooling the energy storage device arranged in the energy storage device receptacle.

The energy storage receptacle is preferably designed as a pocket or compartment on an outer wall of the housing.

Provision is preferably made for the energy storage receptacle to have such a depth that the energy storage devices do not protrude or only protrude by a maximum of 10% of their length in front of the energy storage receptacle and/or an outer contour of the housing when the energy storage devices are accommodated in the energy storage receptacle . It is therefore advantageous if the energy store or the energy stores can, so to speak, fully engage in the energy store receptacle and/or do not protrude in front of a wall, in particular not in front of an outer wall, of the housing on which the energy store receptacle is arranged.

It is advantageously provided that the device interfaces have longitudinal guide contours for the guiding engagement of longitudinal guide contours of the energy storage interfaces along plug-in axles. The longitudinal guide contours include, for example, guide grooves and guide projections, each of which extends along the plug-in axles.

The quick-release axles can be parallel to one another. However, it is also possible for the quick-release axles to be arranged at an angle to one another, preferably at a small angle of at most 30°, in particular at most 20°, particularly preferably at most 10° or even more preferably at most 5°.

Provision is preferably made for device interfaces to also have gripping contours that interact with counter-gripping contours of the energy storage interfaces, so that the energy storage devices, when they are arranged on the device interfaces, are held on the device interfaces in a form-fitting manner transverse to their respective plug-in axles . For example, the rear gripping contours include retaining projections that extend transversely to the respective plug-in axle and that can be brought into or out of engagement with one another by a sliding actuation parallel to the plug-in axle.

It is also advantageous for the device interfaces to include latching devices for latching latching devices of the energy storage interfaces. The latching devices include, for example, one or more latching receptacles. The energy storage interfaces have latching devices complementary to the latching devices of the device interfaces, for example at least one latching projection.

The device interfaces of the electrical device preferably include contact arrangements for establishing electrical connections to contact arrangements of the energy storage interfaces of the energy storage. These contact arrangements of the device interfaces and/or the energy storage interfaces include, for example, energy supply contacts and/or data contacts.

The contact arrangements include, for example, spring contacts, contact tongues or the like.

Provision is preferably made for the contact arrangements of the energy storage interfaces and the device interfaces to come into electrical contact with one another when the energy storage devices are plugged into the device interfaces.

It is advantageous if all contacts of a contact arrangement of a device interface are arranged on that side wall on which the device interface is arranged.

The power supply contacts serve to supply electrical power to the at least one electrical consumer, in particular the drive motor, of the electrical device.

The data contacts of the device interfaces are used for data transmission from the energy store to the electrical device and/or vice versa. The data contacts are e.g. The energy store can also include a controller.

A respective control of the energy store and/or the electrical device comprises, for example, one or more processors and memories, in which, for example, a control program for controlling the electrical device is stored for the electrical device and a control program for controlling the energy store, for example a charging program, for the energy store. is saved. The respective control of the electrical device or energy store is designed to execute program code of the respective control program.

The energy storage receptacle can be open, for example, on a side that extends between the side walls. However, the energy storage receptacle is preferably completely surrounded by peripheral walls. The peripheral walls extend from the insertion opening into an interior space of the housing.

Provision is preferably made for the energy storage receptacle to have connecting walls which extend between the opposite side walls and delimit an interior space for accommodating the energy storage.

The connecting walls are e.g. ceiling walls or floor walls. The connecting walls and the side walls form, for example, peripheral walls of the energy storage receptacle.

It is advantageous if an operating space for gripping the energy storage device is provided between at least one connecting wall and the opposite energy storage device when the energy storage device is accommodated in the energy storage device receptacle. This means that the energy storage device can be gripped and/or operated from the side, for example.

Provision is preferably made for the operating space to have a width corresponding to the finger of an adult and/or a width of at least 1.5 cm, preferably at least 2 cm. The operator can therefore reach into the operating space with his fingers, for example in order to grasp the respective energy store with a clamp-like grip.

Due to the energy store accommodated, so to speak, bottom to bottom in the energy store receptacle, the following advantageous configuration, which can be implemented without further ado, is also possible.

Provision is preferably made for the operating space to extend continuously between the side walls of the energy store receptacle. The operating space preferably has a constant height between the side walls. However, it is also possible for the operating space to have a greater width in the area of the floor walls or near the floor walls than near the side walls. Even then, it is easily possible for an operator to intervene in the control room in order to selectively actuate one or the other energy storage device or both energy storage devices at the same time.

An advantageous concept provides that between each connecting wall and the opposite energy store an operating space is arranged through which the energy store can be gripped like a clamp on opposite long sides when the energy store is accommodated in the energy store receptacle. With this configuration in particular, a clamp-like grip for grasping the energy store is easily possible.

A preferred embodiment provides that between each connecting wall and the energy storage device opposite it, an operating space is arranged through which the energy storage device can be gripped like a clamp on opposite long sides when the energy storage device is accommodated in the energy storage device receptacle. For example, the operator can grasp the energy store like a pair of tongs or clamps and pull it out of the energy store receptacle.

It is also advantageous if the energy storage device has an operating element on at least one longitudinal side, which engages in the energy storage device receptacle when the energy storage device is received in the energy storage receptacle. Recording is solvable. The control element is used, for example, to adjust the latching device of the energy store from which the energy store on the device Interface holding detent position in a detent-release position in which the energy storage device can be released from the interface, for example by a train operation along the axle.

It is advantageous if such a control element is arranged on opposite sides, in particular longitudinal sides, of the energy store.

A preferred embodiment provides that the electrical device forms a suction device. In this case, the housing forms a suction device housing, in the interior of which a suction turbine for generating a suction flow is arranged, the suction device housing having a suction inlet for admitting the suction flow and a dust collection chamber for collecting dust contained in the suction flow, with between a filter element for retaining dust in the dust collection space is arranged between the dust collection space and a suction turbine inflow opening of the suction turbine.

The insertion opening is advantageously arranged on an outer wall of the housing, in particular the suction device housing, of the electrical device, which extends between a bottom wall and a top wall.

The housing of the electrical device, which is designed as a suction device housing, for example, is preferably designed as a stacking housing designed to form a housing stack extending in the direction of a stacking axis, under which at least one stacking container can be stacked and/or on which at least one stacking container can be stacked. The stacking container is another suction device, for example. However, it is also possible for the stacking container to be, for example, a transport container for a machine tool, in particular for an abrasive and/or cutting machine tool, for example a grinding machine or sawing machine. The dust or particles that occur during operation of the grinding machine or sawing machine can be sucked up using the suction device.

It is possible to loosely stack the housing of the electrical device on a stacking container, so to speak, or to stack a stacking container on the housing of the electrical device. The stacking housing and the further stacking container can, however, optionally engage one another in a form-fitting manner using form-fitting contours arranged on the stacking housing of the vacuum cleaner and the stacking container, so that they hold one another in a form-fitting manner transversely to the stacking axis. For this purpose, for example, feet can be arranged on one stacking container or stacking housing and receptacles for the feet on the other, the stacking container or stacking housing supporting or receiving the feet and engaging in one another in a form-fitting manner.

It is advantageous for the electrical device, in particular the suction device, to have coupling means for coupling its housing to a stacking container that is stacked or stacked underneath along the stacking axis, with the coupling means of the electrical device housing being designed to interact with coupling means of the stacking container, so that the Housing is firmly connected to the stacking container transversely to the stacking axis and parallel to the stacking axis using the coupling means. The coupling means advantageously comprise rear gripping contours arranged on the stacking container and stacking housing, which can be engaged and disengaged from one another transversely to the stacking axis. Furthermore, the coupling means can comprise, for example, one or more locking elements, in particular at least one pivot bolt and at least one locking projection with which the pivot bolt can be brought into engagement.

The electrical device, in particular the suction device, advantageously comprises a container attachment, which can be stacked on top of the housing along the stacking axis as a stacking container or stacked under the housing, the container attachment and the housing having the coupling means for firmly coupling the housing to the container attachment in parallel and transversely to the stacking axis, and wherein the container attachment has a receiving space for at least one component, in particular a suction hose, of the electrical device or the suction device.

The container attachment preferably has a passage opening which is aligned with the suction inlet of the suction device housing when the container attachment is arranged on the suction device housing, the passage opening being provided and designed for pushing through and/or inserting a suction hose.

The suction device advantageously has a dust collection container which is arranged in the dust collection space or provides the dust collection space and can be removed from the suction device housing and is designed in particular in the manner of a cassette. When the dust collection container is accommodated in the housing, it faces the suction inlet. The suction stream flowing in via the suction inlet can thus flow into the dust collection chamber of the dust collection container.

A provided for power supply energy storage preferably includes an energy storage housing, in the interior of a Arrangement of battery cells is arranged to provide electrical energy.

At least one device interface for the detachable connection to an energy store interface of the energy store is provided on the housing of the suction device electrical device, the interfaces comprising contact arrangements for establishing electrical connections via the interfaces.

The energy storage housing has, for example, longitudinal side walls that extend between end walls. The longitudinal side walls and the front side walls are arranged, for example, between a bottom wall and an interface wall, which lie opposite one another, and together with these walls delimit an interior space of the energy storage housing.

The energy store advantageously includes a fan for generating a cooling air flow, which can flow into the energy store housing via an energy store inflow opening and out of the energy store housing via an energy store outflow opening.

• 1 eine perspektivische Schrägansicht eines Sauggeräts von oben, wobei ein Saugeinlass des Sauggeräts offen ist,
• 2 einen vorderen Teil des Sauggeräts gemäß 1 etwa entsprechend einem Detail D1 in 1, wobei der Saugeinlass durch ein Verschlusselement verschlossen ist,
• 3 perspektivische Rückansicht des Sauggeräts gemäß 1, 2,
• 4 das Sauggerät gemäß vorstehender Figuren mit geöffnetem Sauggerät-Gehäuse und einem entfernten Staubsammelbehälter in perspektivischer Schrägansicht von vorn,
• 5 die Anordnung gemäß 4, wobei der Staubsammelbehälter im Sauggerät-Gehäuse des Sauggeräts aufgenommen ist,
• 6 das Sauggerät gemäß vorstehender Figuren mit einem Behälteraufsatz perspektivisch schräg von vorn,
• 7 eine perspektivische Teil-Rückansicht des Sauggeräts gemäß 3, mit entnommenen Energiespeichern, etwa entsprechend einem Ausschnitt D2 in 3,
• 8 den in 7 dargestellten Teil des Sauggeräts, jedoch mit anderer Schrägperspektive,
• 9 den in 7 und 8 dargestellten Teil des Sauggeräts in Frontalansicht mit Energiespeichern,
• 10 die Ansicht entsprechend 9, jedoch mit nur einem Energiespeicher,
• 11 einen Schnitt durch das Sauggerät gemäß 10, etwa entlang einer Schnittlinie A-A in 10,
• 12 einen Schnitt durch das Sauggerät gemäß 10, etwa entlang einer Schnittlinie B-B in 10,
• 13 eine perspektivische Schrägansicht eines Energiespeichers des Sauggeräts,
• 14 eine frontale Ansicht des Sauggeräts von oben, etwa dem Ausschnitt D1 in 1 entsprechend, wobei wie in 1 der Saugeinlass offen ist,
• 15 die Ansicht entsprechend 14, wobei der Saugeinlass durch das Verschlusselement verschlossen ist,
• 16 einen Schnitt durch die Ansicht der 14, etwa entlang einer Schnittlinie C-C in 14,
• 17 einen Schnitt durch die Ansicht gemäß 15, etwa entlang einer Schnittlinie D-D in 15,
• 18 eine frontale Ansicht von oben auf ein offenes Unterteil des Sauggeräts gemäß vorstehender Figuren,
• 19 einen Schnitt etwa entlang einer Schnittlinie E-E durch das Unterteil des Sauggeräts gemäß 18,
• 20 einen Schnitt durch das Sauggerät, etwa entlang einer Schnittlinie F-F in 18,
• 21 einen Schnitt durch das Sauggerät, etwa entlang einer Schnittlinie G-G in 18,
• 22 einen Schnitt durch das Sauggerät, etwa entlang einer Schnittlinie H-H in 18,
• 23 einen Schnitt durch den Teil des Sauggeräts gemäß 18 bis 22, etwa entlang einer Schnittlinie I-I in 20,
• 24 das Sauggerät gemäß vorstehender Figuren mit einem Tragegurt,
• 25 ein Detail D3 aus 24, jedoch mit entferntem Tragegurt und einer Befestigungseinrichtung des Traggurts,
• 26 das Sauggerät gemäß vorstehender Figuren mit Behälteraufsatz in perspektivischer Schrägansicht, wobei der schematisch dargestellte Tragegurt am Behälteraufsatz befestigt ist,
• 27 ein Detail D4 aus 26, wobei die Befestigungseinrichtung des Traggurts in einer Lösestellung dargestellt ist,
• 28 eine Kennlinie eines Volumenstroms durch die Saugturbine des Sauggeräts, und
• 29 Motorkennlinien eines Antriebsmotors der Saugturbine.

An exemplary embodiment of the invention is explained below with reference to the drawing. Show it:

• 1 a perspective oblique view of a suction device from above, with a suction inlet of the suction device being open,
• 2 according to a front part of the suction device 1 approximately corresponding to a detail D1 in 1 , wherein the suction inlet is closed by a closure element,
• 3 perspective rear view of the suction device according to 1 , 2 ,
• 4 the suction device according to the above figures with the suction device housing open and a removed dust collection container in a perspective oblique view from the front,
• 5 the arrangement according to 4 , wherein the dust collection container is accommodated in the suction device housing of the suction device,
• 6 the suction device according to the above figures with a container attachment perspective obliquely from the front,
• 7 a partial rear perspective view of the suction device according to FIG 3 , with removed energy stores, approximately corresponding to a detail D2 in 3 ,
• 8th the in 7 shown part of the suction device, but with a different oblique perspective,
• 9 the in 7 and 8th shown part of the suction device in front view with energy storage,
• 10 the view accordingly 9 , but with only one energy store,
• 11 according to a section through the suction device 10 , approximately along a section line AA in 10 ,
• 12 according to a section through the suction device 10 , approximately along a section line BB in 10 ,
• 13 a perspective oblique view of an energy store of the suction device,
• 14 a front view of the suction device from above, approximately the detail D1 in 1 accordingly, where as in 1 the suction inlet is open,
• 15 the view accordingly 14 , wherein the suction inlet is closed by the closure element,
• 16 a cut through the view of 14 , approximately along a section line CC in 14 ,
• 17 a section through the view according to 15 , approximately along a section line DD in 15 ,
• 18 a front view from above of an open lower part of the suction device according to the preceding figures,
• 19 according to a section along a section line EE through the lower part of the suction device 18 ,
• 20 a section through the suction device, approximately along a section line FF in 18 ,
• 21 a section through the suction device, approximately along a section line GG in 18 ,
• 22 a section through the suction device, approximately along a section line HH in 18 ,
• 23 a section through the part of the suction device according to 18 until 22 , approximately along a section line II in 20 ,
• 24 the suction device according to the above figures with a carrying strap,
• 25 a detail D3 off 24 , but with the carrying strap removed and a fastening device for the carrying strap,
• 26 the suction device according to the above figures with a container attachment in a perspective oblique view, with the carrying strap shown schematically being attached to the container attachment,
• 27 a detail D4 off 26 , wherein the fastening device of the carrying strap is shown in a release position,
• 28 a characteristic curve of a volume flow through the suction turbine of the suction device, and
• 29 Motor characteristics of a drive motor of the suction turbine.

A suction device 10 has a suction device housing 20 in which a suction turbine 11 of the suction device 10 is accommodated. A suction flow S can be generated with the suction turbine 11 and can flow into the suction device housing 20 through a suction inlet 12 . A suction hose SL can be connected to the suction inlet 12 .

The suction flow S flows through a dust collection chamber 21 of the suction device housing 20, in which particles contained in the suction flow S, for example dust, can be collected. A filter element 13 , for example a plate filter, is arranged between the suction turbine 11 and the dust collection space 13 , so that particles contained in the suction flow S are retained in the dust collection space 21 . The suction flow S flows through the suction turbine 11 downstream of the filter element 13 and flows out of the suction device housing 20 via an air outlet 22 .

The suction device 10 is, for example, a mobile electrical device that can be conveniently brought to its place of use. For example, the suction device body 20 is box-shaped and compact. However, the features and configurations explained below can also be used without further ado in a stationary electrical device.

The suction device 10 can be parked with its underside 14 on a surface. The suction inlet 12 is arranged on an upper side 15 of the suction device 10 opposite to the lower side 14 . Between the bottom 14 and the top 15, the suction device 10 or its suction device housing 20 has longer longitudinal sides 16 and 17, of which the longitudinal side 16 forms a front side and the longitudinal side 17 forms a rear side of the suction device 10, for example.

In a housing interior 23 of the suction device housing 20, the dust collection space 21 and a suction turbine part 24 are provided, in which the suction turbine 11 is accommodated.

The suction device housing 20 comprises a bottom wall 25, from which peripheral walls protrude, namely front and rear longitudinal side walls 26, 27 on the longitudinal sides 16 and 17 and longitudinal side walls 28 and 29 on the longitudinal sides 18 and 19, which extend between the longitudinal side walls 26 and 27 enclose the housing interior 23 overall.

An intermediate wall 30 is arranged between the suction turbine part 24 and the dust collection space 21 , which divides the housing interior 23 into the suction turbine part 24 and the dust collection space 21 , so to speak.

A throughflow opening 32 for the suction flow S is provided on the intermediate wall 30, through which the suction flow S can flow from the dust collection chamber 21 in the direction of the suction turbine part 24, which has a suction turbine receiving space 31 in which the suction turbine 11 is received. The intermediate wall 30 could also be described as a bulkhead, which separates the suction turbine part 24 from the dust collection chamber 21 apart from the throughflow opening 32 and other small outflow openings 98, 108 to be described.

The suction stream S flows out of the suction turbine receiving space 31 via the air outlet 22 . The suction turbine part 24 and in particular the suction turbine receiving space 31 are closed by a cover wall 34, while the dust collection space 21 is open on its side opposite the bottom wall 25, e.g. at the top in the position of use.

The air outlet 22 is arranged, for example, on one of the peripheral walls of the suction device housing 20, for example the front longitudinal side wall 26, although the longitudinal side walls 27 or 28 could also have an air outlet. In any case, it is advantageous if the air outlet 22 is not arranged on the bottom wall 25 and/or not on the cover wall 34, both of which are possible in principle.

The dust collection space 21 has a compartment 35 for a dust collection container 36 . The dust collection container 36 is used to collect dirt. A filter bag can also be arranged in the dust collection container 36 or the dust collection space 21 .

The dust collection container 36 is designed, for example, as a type of cassette or module which can be removed from the suction device housing 20 in order, for example, to empty dust from the dust collection container 36 .

The dust collection container 36 has a bottom wall 37 , side walls 38 and 39 protruding from the bottom wall, and a filter receptacle 40 for the filter element 13 , which delimit an interior space 43 of the dust collection container 36 . The Filter element 13 is located opposite side wall 39 . The side walls 38 extend between the filter holder 40 and the side wall 39. The side walls 38, 39 and an upper wall of the filter holder 40 delimit a receiving opening 41 which is opposite the bottom wall 37. Consequently, the dust collection container 36 is open at the top.

A carrying handle 42 in the manner of a handle is pivoted to the side walls 38 by means of pivot bearings 42A, with which the dust collection container 36 can be gripped. When the carrying handle 42 is swung out, it can be grasped by an operator. When the dust collection container 36 is inserted into the receiving compartment 35 , the carrying handle 42 can be pivoted in the direction of the filter mount 40 so that the carrying handle 42 does not project in front of the receiving opening 41 or only slightly.

Provision is advantageously made for the carrying handle 42 pivoted in the direction of the filter holder 40 to lock the dust collection container 36 in the receiving compartment 35 . At the same time, the filter element 13 is expediently stretched in the direction of the intermediate wall 30 so that a flow connection is established between the interior 43 of the dust collection container 36 and the flow opening 32 and thus the suction turbine 11 via the filter element 13 .

The suction turbine part 24 and the dust collection chamber 21 form part of a lower housing part 44 of the suction device housing 20. The lower housing part 44 can be closed by a cover 45. In the open state of the suction device housing 20 or in an open position OD of the cover 45, the storage compartment 35 is open in order to insert the dust collection container 36 into the storage compartment 35 or to remove it from it.

The cover 45 has a cover body, e.g. The suction turbine section 47 is assigned to the suction turbine part 24 and is located opposite the covering wall 34 when the cover 45 is in the closed state.

The closure section 48 has a seal 49 with which the interior 43 of the dust collection container 36 can be closed. When the cover 45 is closed, the seal 49 rests, for example, on the end faces of the side walls 38 and 39 and on a side wall delimiting the filter holder 40, and in particular on these side walls 38, 39 and the outer circumference of the filter holder 40, so that the closure section 48 the dust collection container 36 closes tightly.

The cover 45 can be locked to the lower housing part 44 in a closed position SD of the cover 45 by means of a locking device 50 .

The locking device 50 comprises a locking element 51 which is pivotably mounted on the cover 45 and which, in a locking position, engages with a locking element 52 on the lower housing part 44 and can be pivoted into a release position in which it disengages from the locking element 52 . The locking element 51 is therefore designed in the manner of a swivel bolt. The locking element 52 is arranged on the longitudinal side wall 26 of the lower housing part 44 . The locking element 52 is configured as a locking projection, for example. Corresponding to the front-side arrangement of the locking element 52 , the locking element 51 is arranged on a front side of the cover 45 assigned to the front side or front longitudinal side 16 of the suction device 10 .

The cover 45 is pivoted to the lower housing part 44 by means of pivot bearings 53 and can be pivoted between its open position OD and its closed position SD. The pivot bearings 53 are arranged, for example, on the longitudinal side wall 27, in particular its upper end face or narrow side.

A strap 53A optionally present between the cover 45 and the lower housing part 44, which is fastened, for example, to the cover wall 34 and a wall surface of the closure section 48 opposite thereto, limits the pivoting path of the cover 45 in the direction of its open position OD.

Feet 54, 55 are arranged on the underside 14 of the suction device housing 20, with which the suction device housing 20 can be placed on a surface, but also in engagement with receptacles 56, 57 with a further suction device housing 20 of a similar suction device 10 in intervention can be brought. The feet 54 and the seats 56 are arranged close to the rear longitudinal side wall 27 . The receptacles 56 and the feet 54 have rear gripping contours 56A, 54A, which can be engaged and disengaged with one another transversely to a stacking direction or stacking axis SR and then, when they are engaged with one another, along the stacked suction device housing 20 on top of one another to connect tightly. The rear gripping contours 56A, 54A form components of coupling means 58. The coupling means 58 for coupling stacked containers or Suction device housings 20 also include a locking element 59, which is arranged on the lower housing part 44 in the manner of locking element 52, but not close to the free end face of the longitudinal side wall 26, but close to the bottom wall 25. Furthermore, the locking element 51 also forms a part of the Coupling means 58. If the locking element 51 of a respective lower container or suction device housing 20 is brought into engagement with the locking element 59 by pivoting the locking element 51, the containers or suction device housing 20 are also in the area of the front or front longitudinal side 16 with each other coupled and thus made a tensile connection of this suction device housing 20 in the direction of the stacking axis SR or in the stacking direction.

The suction inlet 12 can be closed by a closure element 60 .

The closure element 60 has a closure body 61 which can be inserted into the suction inlet 12 . The closure body 61 is therefore designed as a plug-in projection or plug-in body.

The closure element 60 is movably mounted on the suction device housing 20 by means of a bearing 62 between a closed position V and a release position FS, the closure element 60 closing the suction inlet 12 in the closed position V and releasing it in the release position FS. In the release position FS, the suction inlet 12 is free or open for arranging, in particular for inserting, the suction hose SL.

The bearing 62 is a pivot bearing, for example, by means of which the closure element 60 is mounted pivotably about a pivot axis SC. The pivot axis SC is, for example, orthogonal to the top surface of the top 45A of the lid 44 or to the top surface of the suction device housing 20.

The bearing 62 includes a bearing projection 63 on the closure element 60 which engages in a bearing receptacle 64 on the upper side 15 of the cover 44 . The bearing mount 64 is designed, for example, as a passage opening on the cover body or the cover wall 46 . The bearing projection 63 penetrates the passage opening. From the bearing projection 63, in particular at its free end area, there is a gripping contour 63A, for example a flange-like latching projection or the like, which grips the cover body or the top wall 46 on an underside of the cover 45 facing away from the top 15, so that the closure element 60 is captive, however is pivotally supported on the lid 45 or the suction device housing 20.

The locking body 61 and the bearing projection 63 are arranged on an arm body 65 of the locking member 60 . The arm body 65 extends along a longitudinal axis L60 between the bearing projection 63 and the closure body 61, which are arranged at mutually opposite longitudinal end regions of the arm body 65.

The arm body 65 is preferably plate-like and/or is designed in the manner of a strap.

The cover 45 and thus the suction device housing 20 have a closure element receptacle 67 for the closure element 60 . The closure element receptacle 67 is designed as a depression on the upper side 45A of the cover 45 . A top 66 of the closure element 60 facing away from the top 45A of the cover 45 does not protrude in front of the top 45A of the cover 45 or is behind this top 45A, which is not shown in the exemplary embodiment, but is an option. Thus, the upper side 45A of the cover 45 is available for stacking another container or suction device housing 20 or also the container attachment 200, which will be explained below, without the closure element 60 representing an interfering contour.

The closure element receptacle 67 is approximately triangular in plan view, for example, with the bearing 62 being arranged in one corner area of this triangle and the suction inlet 12 and a delivery receptacle 68 being arranged in the other corner areas.

The supply receptacle 68 is also designed as a plug-in receptacle and has a peripheral wall 69 and a base 70 .

The suction inlet 12 is designed as a plug-in receptacle with a peripheral wall 71 into which either the form-fit body 61 or the suction hose SL can be inserted.

The locking body 61 protrudes in front of the arm body 65 in the manner of a locking projection and has a peripheral wall 72 and a bottom 73 . A handle portion 74 protrudes from the bottom 70 into an interior space delimited by the peripheral wall 72 and forms a handle 74A for grasping the closure element 60 .

• Beispielsweise ist der Armkörper 65 flexibel, sodass der Verschlusskörper 61 unter Biegung des Armkörpers 65 aus dem Saugeinlass 12 oder der Bereitstellungsaufnahme 68 heraus bewegt werden kann.

The closure body 61, preferably the closure element 60 as a whole, consists of a flexible material which, on the one hand, enables a press fit or tight fit in the suction inlet 12 or the delivery receptacle 68, but on the other hand also enables easy handling. This becomes clearer below:

• For example, the arm body 65 is flexible so that the closure body 61 can be moved out of the suction inlet 12 or the delivery receptacle 68 while bending the arm body 65 .

Alternatively or additionally, however, a correspondingly movable mounting or pivotable mounting on bearing 62 would also be possible in order to pivot closure element 60 not only back and forth about pivot axis SC between supply receptacle 68 and suction inlet 12, but also disengage or disengage transversely to pivot axis SC to pivot into engagement with the staging receptacle 68 and the suction inlet 12 . For example, the closure element 60 can be movably mounted in the bearing receptacle 65 about a pivot axis SQ running transversely to the pivot axis SC, so that the closure element 60 can be moved away from the upper side 45A and disengaged from the suction inlet 12 or the delivery receptacle 68 . For this purpose, for example, the bearing projection 63 can have a significantly smaller diameter than the bearing mount 64 and thus have a play of movement transversely to the pivot axis SC in the bearing mount 64.

The handle portion 74 includes a base wall 75 from which side walls 76 project. The base wall 75 and side walls 76 form an approximately U-shaped or V-shaped configuration in cross section. The side walls 76 extend between the base wall 75 and the bottom 73 of the closure body 61. The base wall 75 and the bottom 70 are, for example, parallel to one another. The side walls 76 face the peripheral wall 72 of the closure body 61 . The side walls 76 are advantageously long enough for the handle section 74 to extend as far as the arm body 65 . For example, the base wall 75 is approximately flush with the arm body 65 and/or with the top 45A of the lid 45. This makes it easier to grasp the handle 74A.

On the outer periphery of the peripheral wall 72 of the closure body 61 is a seal 77, for example in the form of ribs or sealing projections 77A, which rests against the peripheral wall 71 or the peripheral wall 72 in a sealing fit or press fit when the closure body 61 engages in the delivery receptacle 68 or the suction inlet 12 . Thus, in any case, the closure body 61 is held reliably in the provision receptacle 68 or the suction inlet 12 . In particular, the seal 77 ensures that the suction inlet 12 is sealed when no suction hose SL is inserted, so that no dust or other dirt from the dust collection container 36 or the dust collection space 21 can get into the environment. Nevertheless, the operator easily manages to actuate the closure element 60 from the supply receptacle 68 into the suction inlet 12 or vice versa.

Insertion into the supply receptacle 68 or the suction inlet 12 is possible, for example, by pressing DV on the base wall 75 of the handle section 74.

However, actuation from the suction inlet 12 or the delivery receptacle 68 is also easy to effect despite the press fit of the seal 77 on the peripheral wall 71 or 72 . The handle section 74 can namely be gripped with a clamp-like gripping movement and pulled out of the suction inlet 12 or the delivery receptacle 68 counter to the direction of actuation of the pressure actuation DV.

For example, the side walls 76 are parallel to one another or, as in the exemplary embodiment, are inclined at a small angle to one another, so that when an operator grips the handle section 74, he can grip the two side walls 76 like a clamp and move them towards one another, for example by means of a compressive load DO. As a result, sections of the peripheral wall 72 and thus the seal 77 are actuated away from the peripheral wall 71 or 72, so that the clamping fit of the closure body 61 on the delivery receptacle 68 or the suction inlet 12 is canceled or at least less tight. In addition, it can be advantageous if the side walls 76 yield under pressure when the operator acts on them and form recessed grips, so that handling is made even easier. At this point it should be mentioned that rib structures or similar other gripping structures can of course also be provided on the handle section or handle of a closure element in order to facilitate handling.

The suction device 10 advantageously has a container attachment 200 or is compatible with a container attachment 200 . The container attachment 200 preferably has the same contour on its outer circumference as the suction device housing 20. The container attachment 200 can be stacked on the suction device 10, namely its suction device housing 20, and connected to it using the coupling means 58 already explained.

For example, the container attachment 200 includes a suction device housing 220 with a bottom wall 225, from which longitudinal side walls 226, 227, 228 and 229 protrude, which altogether delimit a receiving space 223 of the container attachment 200. The receiving space 223 is suitable for receiving the suction hose SL.

A handle 224 receiving space 223 protrudes from the bottom wall 225 . The handle 224 is designed like a handle, so that the container attachment 200 attached to the suction device housing 20 serves as a carrying handle for carrying a stack 9 consisting of the suction device 10 and container attachment 200 . This forms a suction device housing 20 stack housing 20A. The container attachment 200 forms a stacking container 200A.

At the same time, the suction hose SL can be wound around the handle 224 so that it serves as a winding aid.

A passage 222 for the suction hose SL is provided on the bottom wall 225 and is aligned with the suction inlet 12 when the container attachment 200 is attached to the suction device 10 . Furthermore, a lateral opening 221 for the suction hose SL is provided on the longitudinal side wall 28 .

On the longitudinal side wall 226, locking elements 251, 259 are provided as coupling means 58, which are structurally identical to and/or compatible with the locking elements 51 and 59. Thus, for example, the locking element 51 of the suction device 10 can be brought into engagement with the locking element 259 in order to form the stack 9 consisting of the suction device 10 and the container attachment 200 stacked on top.

Feet corresponding to feet 54 and 55 are not visible in the drawing on the side of the bottom wall 225 facing away from the receiving space 223, which can be brought into engagement with the receptacles 56 and 57 of the suction device housing 20, so that in combination with the interlocking locking elements 51 and 259 of the coupling means 58, a secure hold of the container attachment 200 on the suction device 10 can be effected in the direction of the stacking axis SR or in the stacking direction.

However, the coupling means 58 also readily bring about a fixed connection between the container attachment 200 and the suction device housing 20 transversely to the stacking axis SR.

Further containers, for example containers for transporting tools, can be stacked or stacked underneath on the stack 9, which can be coupled to the container attachment 200 or the suction device housing 20 using coupling means that are compatible with the coupling means 58. For example, the container attachment 200 can also be arranged under the suction device housing 20 and connected to it by means of the coupling means 58 to form a stack. Furthermore, another container attachment 200, not shown in the drawing, or another suction device 10, not shown, can be attached, for example, to the 6 upper container attachment 200 stacked and coupled to form a stack with this using coupling means that are compatible with the coupling means 58.

In principle, it would now be possible for the suction device 10 to be designed as a suction device that can be operated via a power supply network. However, the suction device 10 is not only extremely compact, but can also be used flexibly, in that the suction device 10 has a power supply device 80 to which energy stores 170, for example so-called battery packs, can be connected.

Two energy stores 170 of the same type, also referred to below as energy stores 170A, 170B, are provided for the power supply.

The power supply device 80 comprises an energy storage receptacle 81 in the region of the suction turbine part 24. The energy storage receptacle 81 extends between the longitudinal side wall 28 and the partition wall 30 over almost the entire distance between the longitudinal side wall 28 and the partition wall 30, so that in the energy storage receptacle 81 two energy stores 170 can be arranged.

The energy store receptacle 81 includes an insertion opening 82 through which the energy store 170 can be inserted into the energy store receptacle 81 . The insertion opening 82 is delimited by side walls 83, 84, which run next to the side wall 28 of the suction device housing 20 and the intermediate wall 30 of the suction device housing 20, in particular parallel to the same. Extending between the side walls 83 and 84 is a side wall or connecting wall 85 closer to the cover 45 and a side wall or thick wall 86 closer to the bottom wall 25 or formed by the bottom wall 25. The energy storage receptacle 81 is delimited by a bottom wall 87 which is the Insertion opening 82 is opposite.

Device interfaces 90A, 90B, hereinafter also referred to uniformly as interfaces 90, are arranged on the side walls 83, 84, with which the energy storage devices 170, which have energy storage device interfaces 190 matching the interfaces 90, can be connected.

For example, the interfaces 90, 190 include complementary longitudinal guide contours 91, 191, which can be inserted into one another along a plug-in axis SA. For example, the longitudinal guide contours 91, 191 longitudinal grooves and longitudinal projections that can engage with each other.

Rear gripping contours 91A, 191A of the interfaces 90, 191 extend transversely to the respective plug-in axle SA, with which the energy stores 170 can be brought into form-fitting engagement with the device interfaces 90 transversely to the respective plug-in axle SA.

The interfaces 90, 190 can be connected to one another in a form-fitting manner on the basis of the gripping contours 91A, 191A and the longitudinal guide contours 91, 191, apart from a sliding mobility along the respective plug-in axle SA.

Furthermore, the interfaces 90, 190 include latching devices 92, 192 in order to latch the energy store 170 to the device interfaces 90. The latching devices 92 are designed, for example, as latching receptacles 93 into which the latching projections 193 of the latching devices 192 can engage in a latching manner, so that the energy stores 170 are held in a non-displaceable manner at the interfaces 90 with respect to the plug-in axle SA. The latching projections 193 are, for example, spring-loaded or resilient in the direction of their latching position in which they engage in the latching receptacles 93 and can be disengaged from the latching receptacles 93 against the aforementioned spring loading.

The interfaces 90, 190 include contact arrangements 94, 194 to establish electrical connections between the energy store 170 and the suction device 10. The contact arrangements 94, 194 include, for example, energy supply contacts 95, 195 with different polarity, for example a positive potential and ground, as well as data contacts 96, 196 for data transmission between the suction device 10 and the respective energy store 170. Such a data transmission sees a digital bus data transmission, for example , especially with a 12C bus.

The energy stores 170 are advantageously structurally identical. Each energy storage device 171 has an energy storage device housing 171, which comprises longitudinal side walls 172 on its longitudinal sides 172A and end-side walls 173, 174 extending between these. Extending between the side walls 172-174 is a bottom wall 175 and, opposite this, an interface wall 176 on which the energy storage interface 190 is arranged. The interface wall 176 can have a stepped shape, so that the data contacts 196 are at a greater distance from the bottom wall 175 than the power supply contacts 195, for example.

Furthermore, the power supply contacts 195 and the data contacts 196 are arranged one behind the other in relation to the plug-in axle SA. For example, the data contacts 196 are arranged at the front along the plug-in axis SA in the plug-in direction, i.e. closer to the end wall 173, while the supply contacts 195 are arranged in the plug-in direction along the plug-in axis SA at the rear, i.e. near the end side wall 174. The energy storage housing 171 has an interior 177 in which battery cells 178 are arranged, protected from environmental influences. However, the battery cells 178 heat up, for example, when charging or discharging, ie when the suction device 10 is operated using the energy store 170 . However, the battery cells 178 in the energy stores 170 are actively cooled, for which purpose each energy store 170 has a fan 179 . The fan 179 generates a cooling air flow KL, which flows through an energy store inflow opening 180 into the interior space 177 and through an energy store outflow opening 181 out of the latter. For example, the energy storage inflow opening 180 is arranged on the bottom wall 175 while the energy storage outflow opening 181 is arranged on the interface wall 176 . In addition, the energy storage inflow openings 180 and the energy storage outflow openings 181 are arranged on opposite longitudinal end regions of the energy storage 170, namely close to the end wall 174 and the end wall 173, so that the cooling air flow KL, e.g Cooling air flow KLB, a respective energy storage device 170 flows through, so to speak, from the back to the front with respect to the plug-in direction or plug-in axle SA.

The device interfaces 90 are arranged on opposite sides of the energy storage receptacle 81, namely on the side walls 83 and 84. Accordingly, the energy stores 170 are accommodated in the energy store receptacle 81 with bottom walls 175 lying opposite one another.

Operating elements 197 are provided on the longitudinal side walls 172 of the energy storage housing 171 to actuate the latching devices 192 . An operator can therefore grip the energy storage housing 171 laterally and/or in the manner of a clamp, so to speak, in order to simultaneously act on the two operating elements 197 arranged on the opposite longitudinal side walls 172, in order to disengage the locking projections 193 from the locking receptacles 93, so that the respective energy storage device 170 from the device interface 90 is removable.

The receptacles 81 allow convenient handling, because between the connecting walls 85, 86 and the energy storage devices 170 inserted into the energy storage receptacle 81, there are operating spaces 88 and 89, into which an operator can actuate the operating elements 197, which, for example, have pressure surfaces or Have touch surfaces, can grasp. The control rooms 88 and 89 are, so to speak, uniform or continuous control rooms, because there is no separating component between the energy stores 170 accommodated in the energy store receptacle 81 . If, for example, the energy stores 170 were accommodated in the energy store receptacle 81 with the energy store interfaces 190 facing one another, there would have to be a partition in the energy store receptacle 81 on which the device interfaces 90 are arranged.

In addition, due to the generous design of the control rooms 88 and 89, the operator can grasp the energy stores 170, for example on their longitudinal side walls 172, in order to remove them from the energy store receptacle 81. However, this also makes operation easier when inserting the energy storage device 170 into the energy storage device receptacle 81, because in this case too the operator can grasp the longitudinal side walls 172 in order to plug a respective energy storage device 170 into the device interface 90 assigned to it.

The side walls 83, 84 are advantageously spaced apart from one another in such a way that the energy stores 170 connected to the device interfaces 90 have a spacing between their bottom walls 175, so that the cooling air flow KL can flow into the space between the bottom walls 175.

Outflow openings 97 and 98, which are close to the device interfaces 90 and thus close to the energy storage outflow openings 181 of the energy storage 170 on the side walls 83 and 84 of the energy storage Recording 81 are arranged. The vents 97 and 98 are hereinafter referred to as receptacle vents because of their location in the energy storage receptacle 81 and are located close to the bottom wall 87 such that little or no heat builds up in the energy storage receptacle 81 .

The outflow opening 98 opens directly into an intermediate space between the intermediate wall 30 and the filter element 13, so that a cooling air duct 99 is formed between the intermediate wall 30 and the filter element 13, which leads from the outflow opening 98 to the throughflow opening 32 on the intermediate wall 30 . Thus, a cooling air flow KLA of the energy store 170 arranged on the side wall 84 can flow out of the receiving outflow opening 98 and is sucked off by the suction turbine 11 via the cooling air duct 99 . In this case, the suction turbine 11 can even intensify the flow of cooling air KLA, which is indicated schematically by arrows.

The energy store 170B can be cooled by a cooling air flow KLB, which can flow out of the energy store mount 81 through the outflow opening 97 . The receiving outflow opening 97 forms a duct inflow opening 97A for a cooling air duct 100.

It is easily possible, for example by means of a hose connection line or the like, to fluidically connect the receiving outflow opening 97 to the throughflow opening 32 on the partition 30 or at least to a suction turbine inflow opening 11A of the suction turbine 11, so that the cooling air flow KLB flows directly to the suction turbine 11 or .

In the present case, however, a different construction has been selected, in which the cooling air duct 100 does not lead directly to the through-flow opening 32, but instead opens into a further cooling air duct 101, which is used to cool further components of the suction device 10, for example for cooling an energization device 140 and also for a permanent cooling Cooling of the suction turbine 11.

The suction turbine 11 is e.g.

Such permanent cooling of the suction turbine 11 is particularly important when it cannot otherwise suck in sufficient air on the inflow side. Such a situation occurs, for example, when the suction inlet 12 is clogged or blocked, when the filter element 13 is no longer passable, when the dust collection space 21 is overcrowded, or the like.

The suction turbine 11 is a so-called passage turbine. The suction turbine 11 has the suction turbine inflow opening 11A on its side facing the flow opening 32 and at least one, preferably several suction turbine outflow openings 11B on its side facing away from the flow opening 32 .

It is advantageous if a seal 11 E between one hand and the intermediate wall 30 ande on the other side of the end face of suction turbine 11 facing partition wall 30 and having suction turbine inflow opening 11A, so that it rests tightly against partition wall 30 and suction flow S can flow through flow-through opening 32, but not into suction turbine receiving space 31, in which the suction turbine 11 is arranged, flows.

The suction turbine receiving space 31 is delimited by a side wall 31A in the region of the suction turbine outflow openings 11B. Between the side wall 31A and the end face of the suction turbine 11, on or next to which the suction turbine outflow openings 11B are arranged, a suction turbine bearing element 11F is advantageously arranged, which is elastically flexible, so that this suction turbine bearing element 11F and the seal 11E protect the suction turbine 11 stored vibration-damped in the suction device housing 20.

The suction turbine 11 has a fan 11C, shown schematically, and an electric drive motor 11D for driving the fan 11C. The drive motor 11D is cooled by the suction flow S during normal operation of the suction device 10, ie when the suction flow S is flowing.

The suction device 10 has an energizing device 140 for energizing the suction turbine 11, in particular the drive motor 11D. The energizing device 140 includes, for example, one or more power electronic semiconductor elements 141, for example thyristors, MosFets or the like. The semiconductor elements 141 heat up during operation, namely when the suction turbine 11 is supplied with current.

The energizing device 140 is arranged on a printed circuit board 104 which is arranged in a sandwich-like manner between the longitudinal side wall 28 and the side wall 83 of the energy storage receptacle 81 of the power supply device 80 . The printed circuit board 104 also partially extends into an intermediate space between the side wall 28 of the side wall 31A. The energizing device 140 is connected to the device interfaces 90A, 90B, in particular the energy supply contacts 95, by means of lines 143. Lines 144 connect the energizing device 140 to the suction turbine 11.

Furthermore, the suction device 10 advantageously has a controller 150 . The controller 150 includes, for example, a processor 151 and memory 152, in which at least one control program 153 for controlling the suction turbine 11, for example, is provided.

An operator can control the suction device 10 using operating elements 155 which are arranged on an operating panel 156 . The control panel 156 is arranged on the side wall 28 .

The controller 150 is electrically connected to the operating elements 155 . With the operating elements 155, the suction device 10 can be switched on or off, for example. Furthermore, the power of the suction turbine 11 can be adjusted using the operating elements 155 . A display 157 is advantageously provided on the control panel 156, for example to display a status of the suction device 11.

The controller 150 also generates heat, the dissipation of which is advantageously solved in the suction device 11, as will become clear below.

The cooling air duct 101 is flow-connected to the receiving outflow opening 97 . Air can thus flow into the cooling air duct 101 via the intake/outflow opening 97, for example the cooling air flow KLB. However, the cooling air flow KLB has already been heated by the cooling of the energy store 170B.

Ambient air, that is to say generally cooler air, can flow into the cooling air duct 101 via a duct inflow opening 102 as a cooling air flow KLC. The channel inflow opening 102 is arranged, for example, close to the bottom wall 25 on an area of the longitudinal side wall 28 facing the bottom wall 25 . A protective grid 102A is advantageously arranged on the duct inflow opening 102 .

The cooling air flow KLC flows via the duct inflow opening 102 into a duct section 103A of the cooling air duct 101, which runs between the printed circuit board 142 and the side wall 31A. Consequently, the cooling air flow KLC flows behind the printed circuit board 142 or the cooling air flow KLC flows past the printed circuit board 142 . In this case, the channel section 103A is selected such that the cooling air flow KLC essentially flows past the energizing device 140, ie in particular past the semiconductor elements 141, which become particularly warm during operation of the suction device 11. However, such heating and, in the worst case, heating is effectively counteracted using the cooling air flow KLC.

At its end remote from the duct inflow opening 102, the duct section 103A opens into a hose receptacle 104, in which a hose 110, thus a tubular body 110A for guiding cooling air, is accommodated.

The hose holder 104 has, for example, a plug-in holder 105 into which the hose 110 is plugged in, and an air-guiding surface 106 on a wall 107.

The cooling air flow KLC flowing out of the duct section 103A is guided into an inlet opening 111 of the hose 110 via the air guiding surface 106 . There is a distance between the inlet opening 111 and the air guiding surface 106 or the wall 107 so that the cooling air flow KLC can flow into the inlet opening 111 unhindered.

The design and/or a cross section of the plug-in receptacle 105 ensures that the hose 110 is only compressed to such an extent that it is securely clamped in the plug-in receptacle 105, but is not compressed to such an extent that its flow cross section is no longer sufficient for the cooling air flow KLC to pass through . A plug-in stop 105A is advantageously located opposite the plug-in receptacle 105, against which a jacket of the cooling-air hose 110 can strike when it is inserted into the plug-in receptacle 105. The plug-in stop 105A is at a distance from the air-guiding surface 106 . The inlet opening 111 cannot be closed by the air-guiding surface 106 because of the plug-in stop 105A.

The cooling air flow KLB can flow past the circuit board 142 and/or in a gap between the circuit board 142 and the cover wall 34 and also into the inlet opening 111 of the cooling air hose 110, so that the cooling air hose 110 flows both the cooling air flow KLB and the cooling air flow KLC in the direction of the channel outflow opening 108 leads. The cooling air hose 110 thus provides a common channel section 103B for the cooling air flows KLB and KLC.

The cooling air hose 110 has a hose section 112, which guides the cooling air flow KLC and/or the cooling air flow KLB past the suction turbine receiving space 31 to a duct outflow opening 108, which is arranged on the intermediate wall 30 and into the space between the intermediate wall 30 and the filter element 13 opens out. There, the cooling air flow KLC and/or the cooling air flow KLB can flow in the direction of the flow opening 32 in order to be sucked off by the suction turbine 11 .

The hose section 112 has an arcuate course. An end area 113 of the tube section 112 is held in the area of the duct outflow opening 108 in a receptacle 109 which is designed, for example, as a plug-in receptacle.

The cooling air flows KLA, KLB primarily cool the energy stores 170A, 170B, but also the suction turbine 11.

Furthermore, although the cooling air flow KLC cools the power supply device 140, it also cools the suction turbine 11.

Since smaller cooling air flows are required to cool the energy storage devices 170A, 170B, the cooling air ducts 99 and 100 advantageously have smaller flow cross sections than the cooling air duct 101. The cooling air duct 101 namely cools the power electronics, e.g. the semiconductor elements 141. This measure helps to ensure that sufficient cooling air flows through the cooling air duct 101 and not, so to speak, past it through the cooling air ducts 99 and/or 100.

The channel inflow openings 97A, 98A and 102 are permanently open. The cooling air flows KLA, KLB and KLC can thus contribute to the cooling of the suction turbine 11 in the long term.

Furthermore, a sensor 154 is arranged on the suction turbine 11, the sensor signals from which are evaluated by the controller 150. The sensor 154 includes or is, for example, a temperature sensor and/or pressure sensor and/or flow sensor. Due to the permanent cooling of the suction turbine 11 using the cooling air flows KLA, KLB and KLC, even when the suction flow S is interrupted or not flowing, there is sufficient flow pressure at the sensor 154 so that it can report valid temperature signals to the controller 150.

Finally, controller 150 is designed to monitor a volume flow of suction flow S, for example using the at least one control program 153.

For example, the suction flow S has a volume flow VS, which has a pressure-dependent profile dependent on a pressure P. A characteristic VK of a volume flow of the suction flow S is in 28 drawn in schematically. For example, at pressures P1, P2 and P3 which are negative or negative, the volume flow VS has values VS1, VS2 and VS3 in liters per second.

The suction stream S should not fall below a minimum speed of 20 m/s, for example, so that a so-called dust class is maintained, according to which the suction device 10 always ensures adequate suction for this dust class.

Depending on the diameter of the suction hose SL, the required minimum speed of the suction flow S results in a minimum value VSmin for the volume flow of the suction flow S, which is approximately 10 l/s for a hose diameter of 27 mm for the suction hose SL.

Due to the constant air flow, which is provided by the cooling air flows KLA, KLB and KLC, among other things, the controller 150 can calculate a characteristic VK of the volume flow of the Determine the intake flow S, because both the characteristic curve VK and the engine characteristics MK1 and MK2 in the area relevant for monitoring the volume flow or the flow rate of the intake flow S have a substantially constant, in particular substantially linear, course.

The motor characteristics MK1 and MK2 depend on the voltages U1 and U2 with which the drive motor 11D is operated. The motor characteristics MK1 and MK2 are proportional to a current curve of the motor current Imot, with which the drive motor 11D is energized by the energizing device 140 .

The controller 150, in particular the control program 153, controls the power supply device 140 and receives feedback from it, for example, the motor voltage present, for example the motor voltages U1 and U2, and the respective motor current Imot for powering the drive motor 11D.

If the motor characteristic MK1 or the motor current Imot falls below the value I1 min or the motor characteristic MK2 or the motor current Imot falls below the value I2min, which correspond to the minimum value VSmin for the volume flow of the suction flow S, the controller 150 recognizes that the flow rate of the Suction stream S is too low and issues a warning on the display 157, for example. In this case, as an alternative or in addition, the controller 150 can also output an acoustic warning to a loudspeaker or another acoustic output means 158 .

A carrying strap 350 is advantageously suitable for comfortably transporting the suction device 10 or the stack 9 consisting of the suction device 10 and container attachment 200 or the container attachment 200 alone.

The carrying strap 350 can be fastened either to the suction device 10 or to the container attachment 200. For this purpose, the carrying strap 350 has a fastening device 340 on each of its longitudinal end regions.

The attachment devices 340 can be brought into engagement with attachment receptacles 300 of the suction device 10 or with attachment receptacles 320 of the container attachment 200 as required.

The fastening devices 340 have base bodies 341 which are designed like plates.

The base bodies 341 have rear gripping contours 342 on their long sides, which, in cooperation with rear gripping contours 302 of the fastening receptacle 300, serve as longitudinal guides along which the fastening devices 340 can be inserted into a respective fastening receptacle 300 along a plug-in axis S300.

In the plug-in direction at the front with respect to a plug-in axle S300, the base body 341 has another rear gripping contour 343, the front section 343A of which strikes a stop 303 of the fastening receptacle 300 at the end of the plug-in movement along the plug-in axle S300.

A bolt 304 of the fastening receptacle 300, which can be actuated using an actuating surface or actuating contour 305, can then reach its locking position, in which it reaches behind and/or over a gripping contour 344 of the fastening device 340.

The bolt 304 is spring-loaded into its locking position, for example, and can be actuated against this spring loading by means of an actuating surface 305 with an unlocking actuation BE in the direction of its release position. The bolt 304 then disengages from the rear gripping contour 344, so that the fastening device 300 can be moved out of the fastening receptacle 300, which is designed as a plug-in receptacle.

The rear gripping contour 343 and the rear gripping contour 344 extend between the rear gripping contours 342. The rear gripping contour 343 and the rear gripping contour 344 are arranged on opposite longitudinal end regions of the base body 341.

The attachment mounts 320 are also designed as plug-in mounts. A fastening device 340 can be inserted into a respective fastening receptacle 320 along a plug-in axis S320 or can be moved out of the fastening receptacle 320 along the plug-in axis S320.

With regard to the attachment receptacle 320, the engagement contours 343 and 344 of the attachment device 340 act as longitudinal guide contours which engage with longitudinal guide contours or Can get behind gripping contours 322 of the mounting bracket 320 and lead the fastener 340 along the axle S320.

One of the rear gripping contours 342 of the fastening device 340, which is at the front in the insertion direction with respect to the stub axle S320, strikes a stop 323 on the bottom or end of the fastening receptacle 320 with respect to the stub axle S320. A gripping contour for receiving this gripping contour 342 can optionally be provided there. A bolt 346 of the fastening device 340 can then also engage with a locking contour 324 of a locking element 325 of the fastening receptacle 320, so that the fastening device 340 is locked in the fastening receptacle 320.

The bolt 346 is designed as a resilient tongue or resilient element with respect to the base body 341 and has an actuating surface 345 with which it can be disengaged from the locking contour 324 of the fastening receptacle 320, which is indicated by an arrow or an actuation BE2 in the drawing is.

The fastening devices 340 have strap mounts 347 for the carrying strap 350 . The carrying strap 350 can, for example, be pushed through a push-through opening 348 of a strap holder 347 and be held on the strap holder 347 in a frictionally engaged manner by means of appropriate sling measures.

The attachment receptacles 320 of the container attachment 200 are located on the longitudinal side walls 228 and 229 in such a way that the carrying strap 340 can be brought into engagement with the attachment receptacles 320 bridging the receiving space 223 of the container attachment 200 . Thus, the stack 9 can, so to speak, hang down from the carrying strap 350 and be carried comfortably.

The mounting receptacles 300, on the other hand, allow the suction device 10 to be carried in the manner of a shoulder bag. For example, the fastening mounts 300 are arranged on one of the longitudinal side walls 26, 27, 28 or 29, specifically on the longitudinal side wall 26 in the exemplary embodiment. In any case, it is advantageous if the fastening mounts 300 are arranged on the narrow sides of the suction device housing 20 .

It is advantageous if the fastening receptacle 300 is arranged in longitudinal end regions of the longitudinal side wall 26, i.e. close to the longitudinal side walls 28 and 29, so that the carrying strap 350 can serve as a strap or carrying handle suitable for hanging on a shoulder in a central section of the longitudinal side wall 26 .

Claims (21)

Electrical device, in particular in the form of a suction device (10) or a machine tool, with a housing (20) in which at least one electrical consumer, in particular an electric drive motor (11 D), is arranged, the electrical device for the electrical power supply of the electrical load, in particular the drive motor (11D), has a power supply device (80) with an energy storage receptacle (81), in the interior of which there are at least two device interfaces (90A, 90B) for the detachable connection of one energy storage interface (190A, 190B) each an electrical energy store (170A, 170B), in particular a battery pack, are arranged, characterized in that the device interfaces (90A, 90B) are arranged on opposite side walls (83, 84) of the energy store receptacle (81), so that the Energy storage (170A, 170B) with mutually facing bottom walls (175) at the device interfaces (90A, 90B) ano are rdable. Electrical device after claim 1 , characterized in that the energy storage receptacle (81) has an insertion opening (82) through which the energy storage devices (170A, 170B) can be inserted into the energy storage receptacle (81). Electrical device after claim 2 , characterized in that the insertion opening (82) is opposite a bottom of the energy storage receptacle (81). Electrical device according to one of the preceding claims, characterized in that the energy storage receptacle (81) is designed as a pocket or a compartment on an outer wall of the housing (20). Electrical device according to one of the preceding claims, characterized in that the energy storage receptacle (81) has such a depth that the energy storage devices (170A, 170B) are not in front of the energy storage receptacle (81) and only up to a maximum of 10% of their length /or an outer contour of the housing (20) protrudes when the energy stores (170A, 170B) are accommodated in the energy store receptacle (81). Electrical device according to one of the preceding claims, characterized in that the device interfaces (90A, 90B) have longitudinal guide contours (91) for leading engagement of longitudinal guide contours (191) of the energy storage Have interfaces (190A, 190B) along stub axles (SA). Electrical device according to one of the preceding claims, characterized in that the device interfaces (90A, 90B) include latching devices (92) for latching latching devices (192) of the energy storage interfaces (190A, 190B). Electrical device according to one of the preceding claims, characterized in that the energy store receptacle (81) has connecting walls (85, 86) which extend between the opposite side walls (83, 84) and which have an interior space for receiving the energy stores (170A, 170B ) limit. Electrical device after claim 8 , characterized in that between at least one connecting wall (85, 86) and the energy store (170A, 170B) lying opposite it, when the energy store (170A, 170B) is accommodated in the energy store receptacle (81), an operating space (88, 89 ) for taking the energy store (170A, 170B) is provided. Electrical device after claim 9 , characterized in that the operating space (88, 89) has a width corresponding to the finger of an adult and/or a width of at least 1.5 cm, preferably at least 2 cm. Electrical device after claim 10 , characterized in that the operating space (88, 89) extends continuously between the side walls (83, 84) of the energy storage receptacle (81). Electrical device according to any of Claims 8 until 11 , characterized in that between each connecting wall (85, 86) and the opposite energy store (170A, 170B) is arranged an operating space (88, 89) through which the energy store (170A, 170B) can be clamped on opposite longitudinal sides (172A). can be grasped when the energy store (170A, 170B) is accommodated in the energy store receptacle (81). Electrical device according to one of the preceding claims, characterized in that the energy store (170A, 170B) on at least one longitudinal side (172A), which engages in the energy store receptacle (81) when the energy store (170A, 170B) in the energy store Recording (81) is included, an operating element (197), by the actuation of which the energy store (170A, 170B) from the device interface (90A, 90B) in the energy storage recording (81) is detachable. Electrical device after Claim 13 , characterized in that the operating element (197) can be actuated by reaching into an operating space (88, 89) of the energy store receptacle (81) between the connecting wall (85, 86) and the energy store (170A, 170B). Electrical device after Claim 13 or 14 , characterized in that the energy store (170A, 170B) has an operating element (197) on opposite longitudinal sides (172A). Electrical device according to one of the preceding claims, characterized in that the at least two energy stores (170A, 170B) comprises or has and/or forms part of a system which comprises the electrical device and at least two energy stores (170A, 170B). Electrical device according to one of the preceding claims, characterized in that the housing (20) forms a suction device housing (20), in whose interior (23) a suction turbine (11) for generating a suction flow (S) is arranged, the suction device - Housing (20) has a suction inlet (12) for admitting the suction flow (S) and a dust collection space (21) for collecting dust contained in the suction flow (S), wherein between the dust collection space (21) and a suction turbine inflow opening (11A ) the suction turbine (11), a filter element (13) for retaining dust in the dust collection chamber (21) is arranged. Electrical device according to one of the preceding claims, characterized in that the housing (20) is designed as a stack housing (20A) designed to form a housing stack (9) extending in the direction of a stack axis (SR), under which at least one stack container (200A) stackable underneath and/or on which at least one stackable container (200A) can be stacked. Electrical device after Claim 18 , characterized in that it has coupling means (58) for coupling its housing to a stacking container (200A) stacked or stacked underneath along the stacking axis (SR), the coupling means (58) of the electrical device including the housing (20) for cooperation with coupling means ( 58) of the stacking container (200A) are designed so that the housing (20) with the stacking container (200A) transverse to the stacking axis (SR) and is firmly connected parallel to the stacking axis (SR) by means of the coupling means (58). Electrical device after Claim 18 or 19 , characterized in that it has a container attachment (200) which can be stacked on top of the housing (20) or underneath the housing (20) along the stacking axis (SR) as a stacking container (200A), the container attachment (200) and the housing (20) has the coupling means (58) for firmly coupling the housing (20) to the container attachment (200) parallel and transverse to the stacking axis (SR), and wherein the container attachment (200) has a receiving space for at least one component, in particular one Having suction hose (SL), the electrical device. Electrical device according to one of the preceding claims, characterized in that it is a mobile electrical device.

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