Electrical device, in particular suction device or machine tool

Abstract

To provide an improved concept for arranging a plurality of energy storage devices on a housing of an electrical device.SOLUTION: The present invention relates to an electrical device, in particular an electrical device in the form of a suction device 10 or a machine tool, with a housing 20 in which at least one electrical load, in particular a drive motor 11D is arranged. The electrical device has a power supply unit 80 with an energy storage device receptacle 81, for the electrical power supply of the electrical load, in particular the drive motor 11D, and in the interior of the receptacle, there are arranged at least two device interfaces 90A, 90B for the detachable connection of respective energy storage interfaces 190A, 190B of an electrical energy storage devices 170A, 170B, in particular battery packs. The device interfaces are arranged on opposing side walls 83, 84 of the receptacle 81, so that the energy storage devices can be arranged on the device interfaces 90A, 90B with mutually facing bottom walls 175.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electric device, for example in the form of a suction device or a machine tool and / or as a mobile electric device, having a housing in which at least one electric load, in particular a drive motor, is arranged, the electric device having a power supply with an energy storage device housing, inside which at least two device interfaces are arranged for the removable connection of an energy storage device interface of an electric energy storage device, in particular a battery pack, for the electric power supply of the electric load, in particular the drive motor. [Background technology]

[0002] The energy storage device is, for example, a so-called battery pack that can be removably connected to an electrical device, such as a suction device or a machine tool, especially a handheld machine tool. In this type of electrical device, to increase mobility and / or electrical output, multiple, e.g., two, such energy storage devices must be simultaneously available for energy transfer. However, the power density of rechargeable energy storage devices is still very low, and therefore they are relatively large. Therefore, the energy storage devices have a large storage volume, so that they can still be held by an operator, for example, to remove them from the energy storage device housing. Summary of the Invention [Problem to be solved by the invention]

[0003] It is therefore an object of the present invention to provide an improved concept for arranging a plurality of energy storage devices in the housing of a mobile or stationary electrical device, for example of the type mentioned above. [Means for solving the problem]

[0004] To achieve this object, in an electrical device of the type mentioned at the beginning, in particular in a suction device or in a machine tool, it is intended that the device interfaces are arranged on mutually opposing side walls of the energy storage device housing, so that the energy storage device can be arranged on the device interfaces with their bottom walls facing each other.

[0005] The advantage of such a device is found in particular in that the energy storage device is arranged in a so-called bottom-to-bottom or bottom-wall-to-bottom configuration, so that a region of the energy storage device housing extending adjacent to the bottom wall is available as an operating space for activating or manipulating the energy storage device. It is true that the work required to route the electrical wires to the device interface within the housing becomes greater. However, in contrast, there is a significantly increased ease of use.

[0006] Advantageously, the electrical device is a mobile electrical device, however the invention can easily be used in fixed electrical devices.

[0007] The electrical energy storage devices may include, for example, a plurality of batteries, which may be arranged side by side in a series arrangement, for example, in the housing of each energy storage device, and which may be connected in series and / or in parallel with one another.

[0008] The electrical energy storage devices are preferably rechargeable electrical energy storage devices. To charge each energy storage device, it can be removed from the energy storage device housing. The energy storage device can be connected to a charging device for electrical charging, for example by means of its energy storage device interface.

[0009] The batteries may have, for example, a cylindrical housing or a cylindrical shape. The batteries may be arranged, for example, in one or more layers, within the energy storage device housing of the energy storage device.

[0010] Preferably, the energy storage device interfaces of the mobile electrical device are connected, for example, in series or in parallel with each other, so that, for example, the supply voltage provided by the energy storage device is applied to the series connection (series circuit). For example, if the energy storage device interfaces are connected in parallel, the available current will be higher.

[0011] Other energy storage devices may be readily placed in the energy storage device interface. Additional energy storage devices may likewise be held within or at the energy storage device interface with opposing bottom walls.

[0012] However, it is also possible for a stationary or mobile electrical device to have energy storage device interfaces that are not arranged on mutually opposing side walls of the energy storage device housing, for example.

[0013] Furthermore, the electric device may also have at least one additional energy storage device housing in which energy storage device interfaces are installed, for example, arranged on opposite sides of the holding wall of the energy storage device housing. The at least one energy storage device housing may further have only a single energy storage device interface for connecting to a single energy storage device. The at least one additional energy storage device housing channel may further be configured as a housing pocket, a housing compartment, etc.

[0014] If the electrical device is a mobile electrical device, it retains its mobility as it is independent of a network interface, so to speak.

[0015] In the case of a mobile or stationary electrical device, there are multiple energy storage devices, ie at least two energy storage devices, for an adequate energy supply.

[0016] The electric load is preferably an electric drive motor. However, as an electric load, the electric device may also include a charging interface for charging an additional electric energy storage device. For example, the housing has an interior space in which the charging interface for charging the additional electric energy storage device is arranged.

[0017] Machine tools include, for example, sewing machines and milling machines.

[0018] It is advantageously provided that the energy storage device receptacle has an insertion opening (plug-in opening) through which the energy storage device can be inserted into the energy storage device receptacle. The extent of the insertion opening is preferably suitable for inserting the energy storage device into the energy storage device receptacle or for removing it from the energy storage device receptacle, while another energy storage device is arranged in the energy storage device receptacle. Advantageously, the insertion opening is arranged in an outer wall of the housing.

[0019] In principle, it is conceivable that the energy storage device receptacle has an opening opposite the insertion opening, so that, for example, a kind of passage is present, such a passage or passage opening being particularly suitable for cooling an energy storage device arranged in the energy storage device receptacle.

[0020] The energy storage device accommodation is preferably designed as a pocket or compartment in the outer wall of the housing.

[0021] Preferably, the energy storage device accommodation is intended to have a depth in which, when the energy storage device is accommodated in the energy storage device accommodation, the energy storage device does not protrude in front of the energy storage device accommodation and / or in front of the outer contour of the housing, or protrudes by a maximum of 10% of the length of the energy storage device, so that the energy storage device or devices engage with the energy storage device accommodation, as it were, and / or do not protrude in front of the wall in which the energy storage device accommodation is arranged, in particular in front of the outer wall of the housing.

[0022] It is advantageously provided that the device interface has a longitudinal guide contour for guiding engagement with a longitudinal guide contour of the energy storage device interface along the plug-in axis, the longitudinal guide contour having, for example, a guide groove and a guide protrusion each extending along the plug-in axis.

[0023] The insertion axes may be parallel to one another, however, it is also possible for the insertion axes 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°.

[0024] Preferably, the device interface further comprises a plurality of gripping contours that interact with the plurality of counter gripping contours of the energy storage device interface, so that when the energy storage devices are placed in the device interface, they are intended to be held in the device interface by positive engagement (form-restraint) transverse to their respective insertion axes, e.g., the rear gripping contours include retention protrusions extending transverse to their respective insertion axes that are engageable or disengageable with each other by a sliding action parallel to the insertion axes.

[0025] The device interface includes a plurality of latching devices for engaging the plurality of latching devices of the energy storage device interface. The latching devices include, for example, one or more latch receptacles. The energy storage device interface includes a latching device, for example, at least one latch protrusion, that is complementary to the latching devices of the device interface.

[0026] The device interface of the electrical device preferably comprises a plurality of terminal devices for establishing an electrical connection with a plurality of terminal devices of an energy storage device interface of the energy storage device, wherein these terminal devices of the device interface and / or of the energy storage device interface comprise, for example, a plurality of energy supply terminals and / or a plurality of data terminals.

[0027] The terminal device may include, for example, a spring contact, a terminal tongue, or the like.

[0028] Preferably, the terminal arrangement of the energy storage device interface and the terminal arrangement of the device interface are intended to be in electrical contact with each other when the energy storage device is plugged into the device interface.

[0029] Terminals of the Device Interface Advantageously, all terminals of the device are arranged on the side wall and / or on a single side wall on which the device interface is arranged.

[0030] The power supply terminals serve to supply electrical power to at least one electrical load of the electrical device, in particular to the drive motor.

[0031] The data terminals of the device interface are used for data transmission from the energy storage devices to the electrical device and / or vice versa. The data terminals are connected, for example, to a control unit of the electrical device, via which the control unit of the electrical device receives, for example, information about the charge state and / or information about the voltage of the respective energy storage device from the energy storage devices. The energy storage devices may also have a control unit.

[0032] The respective control units of the energy storage device and / or the electrical device have, for example, one or more processors and a memory in which a control program for controlling, for example, the electrical device is stored, and a control program for controlling the energy storage device, for example a charging program, is stored for the energy storage device. The respective control units of the electrical device or the energy storage device are designed to execute the program code of the respective control programs.

[0033] The energy storage device receptacle may be open, for example at a side extending between the side walls, but is preferably completely surrounded by a peripheral wall that extends from the insertion opening into the interior space of the housing.

[0034] Preferably, the energy storage device housing has a connecting wall extending between the opposing side walls, the connecting wall defining an interior space for housing the energy storage device. The connecting wall may be, for example, a cover wall or a bottom wall. The connecting wall and the side walls may, for example, form a peripheral wall of the energy storage device housing.

[0035] Advantageously, between the at least one connecting wall and the opposing energy storage device, an access space is provided for gripping the energy storage device when the energy storage device is accommodated in the energy storage device accommodation, which means that the energy storage device can be gripped and / or manipulated, for example, from the side.

[0036] Preferably, the access space is intended to have a width corresponding to an adult finger and / or a width of at least 1.5 cm, preferably at least 2 cm, so that an operator can extend his fingers into the access space and grasp the respective energy storage device, for example with a clamp-like grip.

[0037] Due to the so-called bottom-to-bottom arrangement of the energy storage device accommodated in the energy storage device receptacle, the following configurations are also possible, which can be implemented without further ado.

[0038] Preferably, the access space is intended to extend continuously between the side walls of the energy storage device housing. The access space preferably has a constant height between the side walls. However, it is also possible for the access space to have a greater width in the area of ​​the bottom wall or near the bottom wall than near the side walls. In that case, too, an operator can easily access the access space in order to selectively activate one or the other energy storage device or both energy storage devices simultaneously.

[0039] An advantageous concept provides that an operating space is arranged between each connecting wall and the opposing energy storage device, via which the energy storage device can be clamped (clip-like) on its opposite longitudinal sides when it is accommodated in the energy storage device accommodation section. This configuration particularly facilitates clamp-like gripping of the energy storage device.

[0040] A preferred embodiment contemplates that an access space is arranged between each connecting wall and the opposing energy storage device, and that, when the energy storage device is accommodated in the energy storage device accommodation section, the energy storage device can be clamped (clip-like) at its opposite longitudinal sides via the access space, e.g., an operator can grasp the energy storage device like a pair of tongs or a clamp and pull it out of the energy storage device accommodation section.

[0041] It is also advantageous if the energy storage device has an operating element on at least one longitudinal side that interferes with (engages with) the energy storage device receiving part when the energy storage device is received in the energy storage device receiving part, and by operating the operating element the energy storage device can be removed from the device interface in the energy storage device receiving part. The operating element is used, for example, to adjust a latching device of the energy storage device from a latched position, in which the energy storage device is held in the device interface, to an unlatched position, in which the energy storage device can be removed from the device interface, for example by pulling along the insertion axis.

[0042] Such operating elements are advantageously arranged on opposite sides of the energy storage device, in particular on the long sides.

[0043] A preferred embodiment provides for the electrical device to form a suction device, in which the housing forms a suction device housing, in whose interior space a suction turbine for generating a suction flow is arranged, the suction device housing having an inlet for passing the suction flow and a dust collection chamber for collecting dust contained in the suction flow, and a filter element for retaining the dust in the dust collection chamber is arranged between the dust collection chamber and the suction turbine inlet opening of the suction turbine.

[0044] The insertion opening is advantageously arranged in an outer wall extending between the bottom wall and the top wall, in an outer wall of the housing of the electrical device, in particular in an outer wall of the suction device housing.

[0045] The housing of the electrical device, for example formed by a suction device housing, is preferably designed as a stacking housing designed to form a housing stack extending in the direction of the 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, for example, another suction device. However, the stacking container may also be, for example, a transport container for a machine tool, in particular for a grinding and / or cutting machine, such as a sander or a sewing machine. Dust and particles arising during operation of the sander or sewing machine can be sucked up using the suction device.

[0046] In other words, it is possible to loosely stack the suction device on the stacking container or stack the stacking container on the suction device housing. However, the stacking housing and the further stacking container can optionally be engaged with each other by positive engagement using positive engagement contours arranged on the stacking housing of the vacuum cleaner and the stacking container, so that they hold each other by positive engagement across the stacking axis. For this purpose, for example, a plurality of legs can be arranged on one stacking container or stacking housing, and a plurality of receptacles for the legs can be arranged on the other stacking container or stacking housing, which support or accommodate the legs and engage with each other by positive engagement.

[0047] Advantageously, the suction device has coupling means for coupling the suction device housing to a stacking container stacked above or below it along the stacking axis, the coupling means of the suction device (suction device housing) being configured to interact with the coupling means of the stacking container, such that the suction device housing is firmly connected to the stacking container transversely and parallel to the stacking axis by means of the coupling means. The coupling means advantageously have rear gripping contours arranged on the stacking container and the stacking housing, which can engage and disengage with each other transversely to the stacking axis. Furthermore, the coupling means may have one or more locking elements, in particular at least one pivot bolt and at least one locking protrusion with which the pivot bolt can engage.

[0048] Advantageously, the suction device has a container attachment that can be stacked along a stacking axis as a stack container on top of or below the suction device housing, the container attachment and the suction device housing having connecting means for firmly connecting the suction device housing to the container attachment parallel to and transverse to the stacking axis, and the container attachment having an accommodation space for at least one component of the suction device, in particular a suction hose.

[0049] The container attachment preferably has a passage opening that is aligned with the suction port of the suction device housing when the container attachment is placed on the suction device housing, and the passage opening is intended and designed for pushing through and / or inserting the suction hose.

[0050] The suction device preferably has a dust collection container arranged in or forming the dust collection chamber, the dust collection container being removable from the suction device housing and especially designed in the form of a cassette. When the dust collection container is accommodated in the housing, it faces the suction port. Thus, the suction flow entering through the suction port can flow into the dust collection chamber of the dust collection container.

[0051] The energy storage device provided for the power supply preferably has an energy storage housing, inside which the battery arrangement for supplying electrical energy is arranged.

[0052] At least one device interface for removably connecting to an energy storage device interface of an energy storage device is disposed on the housing of the electrical device, the device interface and the energy storage device interface having a plurality of terminal devices for establishing an electrical connection via their interfaces, i.e., the device interface and the energy storage device interface.

[0053] The energy storage device housing may have, for example, longitudinal side walls extending between a front wall, the longitudinal side walls and the front wall being disposed between, for example, a bottom wall and an interface wall, which are opposite each other and together define an interior space of the energy storage device housing.

[0054] The energy storage device interfaces of the respective energy storage devices are disposed on the interface wall, whereby the energy storage devices are connectable to the respective device interfaces of the electrical device.

[0055] The electrical terminals are preferably not provided on the bottom wall and / or on the longitudinal side walls and / or on the end walls. Advantageously, the energy storage device has electrical terminals only on the interface walls.

[0056] In the state accommodated in the energy storage device, the bottom walls of the energy storage device housing preferably face each other.

[0057] Advantageously, the bottom walls of the energy accumulators accommodated in the energy accumulator receptacles extend parallel to one another and / or face one another with their flat sides.

[0058] As mentioned above, the energy storage device receptacle preferably has opposing side walls. An interface wall of the energy storage device preferably faces one of these side walls of the energy storage device receptacle when the energy storage device is accommodated in the energy storage device receptacle. Furthermore, a connecting wall preferably extends between the opposing side walls. Longitudinal side walls of the energy storage device housing preferably face these connecting walls when the energy storage device is accommodated in the energy storage device receptacle.

[0059] The energy storage device preferably includes a fan for generating a cooling air flow which can enter the energy storage device housing through the energy storage device inlet opening and exit the energy storage device housing through the energy storage device outlet opening.

[0060] Exemplary embodiments of the present invention are described below with reference to the drawings. [Brief explanation of the drawings]

[0061] [Figure 1] 1 shows a schematic perspective view from above of a suction device, the intake port of the suction device being open. [Figure 2] 2 shows a front part of the suction device according to FIG. 1, roughly corresponding to detail D1 in FIG. 1, with the suction opening closed by a closure element; [Figure 3] 3 shows a rear perspective view of the suction device according to FIGS. [Figure 4] 1 shows the suction device according to the previous figures in a schematic perspective view from the front with the suction device housing open and with the dust collecting container removed; FIG. [Figure 5] 5 shows the device according to FIG. 4, in which the dust collection container is accommodated in the suction device housing of the suction device. [Figure 6] FIG. 2 shows the suction device according to the previous figures with a container attachment in an oblique front view. [Figure 7] 4 is a partial rear perspective view of the suction device according to FIG. 3, with the energy storage device removed, corresponding primarily to section D2 in FIG. 3; [Figure 8] 8 shows a portion of the suction device shown in FIG. 7, but from a different perspective. [Figure 9] FIG. 9 shows the portion of the suction device shown in FIGS. 7 and 8 in a front view with an energy storage device. [Figure 10] FIG. 10 shows a diagram corresponding to FIG. 9, but with only one energy storage device. [Figure 11] 11 shows a cross section through the suction device according to FIG. 10, approximately along the section line AA in FIG. 10. [Figure 12] 11 shows a cross section through the suction device according to FIG. 10, approximately along the section line BB in FIG. 10. [Figure 13] FIG. 1 is a perspective view of an energy storage device of a suction device. [Figure 14] 2 shows a front view of the suction device from above, corresponding approximately to section D1 in FIG. 1, with the suction port open as in FIG. 1. [Figure 15] 15 shows a view corresponding to FIG. 14, in which the suction opening is closed by a closure element. [Figure 16] 15 shows a cross section through the device according to FIG. 14, approximately along section line CC in FIG. 14. [Figure 17] 16 shows a cross section through the device according to FIG. 15, approximately along the section line DD in FIG. 15. [Figure 18] FIG. 2 is a front view from above of the open lower part of the suction device according to the previous figures; [Figure 19] 19 is a cross-sectional view generally along the section line EE through the lower part of the suction device according to FIG. 18. [Figure 20] 19 is a cross-sectional view through the suction device taken generally along section line FF in FIG. 18. [Figure 21] 19 is a cross-sectional view through the suction device taken generally along section line GG in FIG. 18. [Figure 22] 19 is a cross-sectional view through the suction device taken generally along section line HH in FIG. 18. [Figure 23] 21 is a cross-sectional view through a portion of the suction device according to FIGS. 18 to 22, taken approximately along section line II in FIG. 20. FIG. [Figure 24] FIG. 1 shows a suction device according to the previous figures with a carrying strap. [Figure 25] FIG. 25 shows detail D3 from FIG. 24, but with the carrying strap removed and with a locking device for the carrying strap. [Figure 26] 1 shows a suction device according to the previous figures with a container attachment in a perspective view, in which a schematically shown carrying strap is attached to the container attachment; [Figure 27] FIG. 27 shows detail D4 from FIG. 26, with the carrying strap fastener shown in the released position. [Figure 28] 1 shows a characteristic curve of the volume flow rate through the suction turbine of the suction device; [Figure 29] FIG. 4 is a diagram showing motor characteristics of a drive motor of a suction turbine. DETAILED DESCRIPTION OF THE INVENTION

[0062] The suction device 10 has a suction device housing 20 in which a suction turbine 11 of the suction device 10 is housed. A suction flow S can be generated by the suction turbine 11 and can enter the suction device housing 20 via a suction port 12. A suction hose SL can be connected to the suction port 12.

[0063] The suction flow S flows through a dust collection chamber 21 of the suction device housing 20, where particles, e.g., dust, contained in the suction flow S can be collected. A filter element 13, e.g., a plate filter, is arranged between the suction turbine 11 and the dust collection chamber 13, so that the particles contained in the suction flow S are retained in the dust collection chamber 21. The suction flow S flows downstream of the filter element 13 through the suction turbine 11 and exits the suction device housing 20 via an outlet 22.

[0064] The suction device 10 is, for example, a mobile (portable) electrical device that can be conveniently carried to the location of use. The suction device housing 20 is, for example, box-shaped and compact. However, the features and structure described below can also be readily utilized in fixed electrical devices.

[0065] The suction device 10 can be placed on a surface or ground by its lower surface 14. The intake port 12 is located on an upper surface 15 of the suction device 10 opposite the lower surface 14. Between the lower surface 14 and the upper surface 15, the suction device 10 or its suction device housing 20 has elongated longitudinal sides 16 and 17, e.g., the longitudinal side 16 forms the front side and the longitudinal side 17 forms the rear side of the suction device 10.

[0066] The suction device housing 20 has a housing interior 23 in which a dust collection chamber 21 and a suction turbine section 24 are provided, in which the suction turbine 11 is accommodated.

[0067] The suction device housing 20 has a bottom wall 25 from which project peripheral walls, i.e., front and rear longitudinal side walls 26 and 27 at longitudinal sides 16 and 17, and longitudinal side walls 28 and 29 at longitudinal sides 18 and 19, which extend between longitudinal side walls 26 and 27 and together enclose housing interior 23.

[0068] An intermediate wall 30 is disposed between the suction turbine section 24 and the dust collection chamber 21 and divides the housing interior 23 into the suction turbine section 24 and the dust collection chamber 21 .

[0069] A through-flow opening 32 for the suction flow S is provided in 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 section 24. It has a suction turbine accommodation space 31 in which the suction turbine 11 is accommodated. The intermediate wall 30 can also be described as a partition wall that separates the suction turbine section 24 from the dust collection chamber 21, apart from the through-flow opening 32 and other small outlet openings 98, 108 described below.

[0070] The suction flow S leaves the suction turbine accommodation space 31 via the outlet 22. The suction turbine part 24 and in particular the suction turbine accommodation space 31 are closed by a cover wall 34, while the dust collection chamber 21 is open on the side opposite its bottom wall 25, e.g. at the top in the use position.

[0071] The exhaust openings 22 are arranged, for example, in one of the peripheral walls of the suction device housing 20, for example in the front longitudinal side wall 26, although the longitudinal side walls 27 or 28 may also have exhaust openings. In any case, it is advantageous if the exhaust openings 22 are not arranged in the bottom wall 25 and / or in the cover wall 34, both of which are in principle possible.

[0072] The dust collection chamber 21 has a collection compartment 35 for a dust collection container 36. The dust collection container 36 is used to collect dust and dirt. A filter bag may also be placed in the dust collection container 36 or the dust collection chamber 21.

[0073] The dust collection container 36 is designed as a type of cassette or module that can be removed from the suction device housing 20, for example, in order to empty the dust from the dust collection container 36.

[0074] 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 define an interior space 43 of the dust collection container 36. The filter element 13 faces the side wall 39. The side wall 38 extends between the filter receptacle 40 and the side wall 39. The side walls 38 and 39 and the top wall of the filter receptacle 40 define a receiving opening 41 facing the bottom wall 37. The dust collection container 36 is therefore open at the top.

[0075] A carrying handle 42 in the form of a strap is hinged to the side wall 38 by means of a swivel bearing 42A, by means of which the dust collection container 36 can be grasped. When the carrying handle 42 is swung, 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 receptacle 40, so that the carrying handle 42 does not protrude or only protrudes slightly in front of the receiving opening 41.

[0076] Advantageously, it is intended that the carrying handle 42 be swiveled in the direction of the filter vessel 40 in order to lock the dust collection container 36 in the receiving compartment 35. At the same time, the filter element 13 is suitably tensioned (biased) 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.

[0077] The suction turbine part 24 and the dust collection chamber 21 form a lower housing part 44 of the suction device housing 20. The lower housing part 44 can be covered with a cover 45. In the open state of the suction device housing 20 or in the open position OD of the cover 45, the storage compartment 35 is open for inserting the dust collection container 36 into the storage compartment 35 or removing it therefrom.

[0078] The cover 45 has a cover body, for example a cover wall 46, which has a suction turbine portion 47 and a closing portion 48. The suction turbine portion 47 is assigned to the suction turbine portion 24 and faces the cover wall 34 when the cover 45 is in the closed state.

[0079] The closure portion 48 has a seal 49 by 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 the side walls defining the filter receptacle 40, and in particular on the outer periphery of these side walls 38 and 39 and the filter receptacle 40, so that the closure portion 48 tightly closes the dust collection container 36.

[0080] The cover 45 is lockable to the lower housing part 44 in the closed position SD of the cover 45 by a locking device 50 .

[0081] The locking device 50 has a locking element 51 pivotally mounted on the cover 45. In the locked position, the locking element engages with a locking element 52 on the lower housing part 44 and can be pivoted to a released position in which it disengages from the locking element 52. The locking element 51 is arranged on the longitudinal side wall 26 of the lower housing part 44. The locking element 52 is configured, for example, as a locking protrusion. Corresponding to the front-side arrangement of the locking element 52, the locking element 51 is arranged on the front side of the cover 45, which is assigned to the front side or front longitudinal side 16 of the suction device 10.

[0082] The cover 45 is hinged to the lower housing part 44 by means of a swivel bearing 53 so that it can pivot between its open position OD and its closed position SD. The swivel bearing 53 is arranged, for example, on the longitudinal side wall 27, in particular on its upper or narrow side.

[0083] Optional straps 53A between the cover 45 and the lower housing part 44, for example fixed to the covering wall 34 and the opposing wall surface of the closure part 48, limit the pivoting of the cover 45 in the direction of its open position OD.

[0084] Legs 54, 55 are arranged on the underside 14 of the suction device housing 20. This allows the suction device housing 20 to be placed on a surface, but can further be engaged with additional suction device housings 20 of similar suction devices 10 by means of receptacles 56, 57. The legs 54 and receptacles 56 are arranged near the rear longitudinal sidewall 27. The receptacles 56 and the legs 54 have rear gripping contours 56A, 54A that can engage and disengage with each other transversely to the stacking direction or stacking axis SR. When engaged with each other, they connect suction device housings 20 stacked one above the other along the stacking axis SR against tension. The rear gripping contours 56A, 54A form components of a connecting means 58. The connecting means 58 for connecting stacked containers or suction device housings 20 also has a locking element 59 arranged in the manner of the locking element 52 on the lower housing part 44, but near the bottom surface 25, not near the free end face of the longitudinal sidewall 26. Furthermore, the locking elements 51 also form part of the connecting means 58. When the locking elements 51 of the respective lower container or suction device housing 20 are engaged in the locking elements 59 by means of the pivoted locking elements 51, the containers or suction device housings 20 are also connected to one another in the region of their front or front longitudinal sides 16, thus creating a tension-resistant connection of these suction device housings 20 in the stacking axis SR or in the stacking direction.

[0085] The suction port 12 is closable by a closure element 60 .

[0086] The closure element 60 has a closure body 61 which can be inserted into the suction opening 12. The closure body 61 is therefore designed as a bayonet lug or a bayonet body.

[0087] 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 released position FS, in which the closure element 60 closes the suction port 12 and in the released position FS releases it. In the released position FS, the suction port 12 is released or open for positioning, in particular for inserting, a suction hose SL.

[0088] The bearing 62 is, for example, a pivot bearing, by means of which the closure element 60 is mounted so as to be pivotable about a pivot axis SC, which is, for example, perpendicular to the upper surface of the cover 44 or to the upper surface of the suction device housing 20.

[0089] The bearing 62 has 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 receptacle 64 is designed, for example, as a passage opening on the cover body or cover wall 46. The bearing projection 63 passes through the passage opening. The bearing projection 63, particularly in its free end region, has a gripping contour 63A, such as a flange-like latch projection, which grips the cover body or cover wall 46 on the underside of the cover 45, which faces away from the upper side 15, so that the closure element 60 can be captured, but is pivotably supported on the cover 45 or the suction device housing 20.

[0090] The closure body 61 and the bearing projection 63 are arranged on an arm body 65 of the closure element 60. The arm body 65 extends along a longitudinal axis L60 between the closure body 61 and the bearing projection 63, which are arranged in opposite longitudinal end regions of the arm body 65.

[0091] The arm body 65 is preferably plate-shaped and / or designed in the manner of a strap.

[0092] The cover 45, and thus the suction device housing 20, has a closure element receptacle 67 for the closure element 60. The closure element receptacle 67 is designed as a recess in the upper side 45A of the cover 45. An upper side 66 of the closure element 60 facing away from the upper side 45A of the cover 45 does not protrude in front of or extend beyond the upper side 45A of the cover 45. This is optional, although not shown in the exemplary embodiment. The upper side 45A of the cover 45 is therefore available for stacking another container or the suction device housing 20 or the container attachment 200 described below, without the closure element 60 presenting an undesirable profile.

[0093] The closure element receiving section 67 is, for example, approximately triangular in plan view, with the bearing 62 arranged in one corner area of ​​this triangle and the suction port 12 and the supply receiving section (equipment receiving section) 68 arranged in the other corner area.

[0094] The supply receptacle 68 is also designed as a plug-in receptacle and has a peripheral wall 69 and a base 70 .

[0095] The suction port 12 is designed as a plug-in receiving part with a peripheral wall 71 into which either the shape-constraining body 61 or the suction hose SL can be inserted.

[0096] The closure body 61 projects in front of the arm body 65 in the form of a closure projection (latch projection) and has a peripheral wall 72 and a bottom 73. A handle portion 74 projects from the bottom 70 into the interior space defined by the peripheral wall 72 and forms a handle 74A for gripping the closure element 60.

[0097] The closure body 61, and preferably the closure element 60 as a whole, consists of a flexible material which on the one hand can be press-fit or snugly fitted into the suction port 12 or the supply receptacle 68, but on the other hand allows for easy handling, as will be explained below.

[0098] For example, the arm body 65 is flexible so that the closure body 61 can be moved from the suction port 12 or the supply receptacle 68 by bending the arm body 65 . Alternatively or additionally, a correspondingly movable or pivotable mounting on the bearing 62 is also possible, so that the closure element 60 can not only be pivoted back and forth about the pivot axis SC between the supply receptacle 68 and the suction port 12, but also pivoted to engage or disengage with the supply receptacle 68 and the suction port 12 transversely to the pivot axis SC. For example, the closure element 60 can be movably mounted in the bearing receptacle 65 about a pivot axis SQ extending transversely to the pivot axis SC, so that the closure element 60 can be moved away from the upper side 45A and decoupled from the suction port 12 or the supply receptacle 68. For this purpose, for example, the bearing projection 63 can have a significantly smaller diameter than the bearing receptacle 64 and can therefore have play in the bearing receptacle 64 transversely to the pivot axis SC.

[0099] The handle portion 74 has a base wall 75 from which a side wall 76 projects. The base wall 75 and the side wall 76 form a generally U-shaped or V-shaped configuration in cross section. The side wall 76 extends between the base wall 75 and the bottom 73 of the closure body 61. The base wall 75 and the bottom 73 are, for example, parallel to one another. The side wall 76 faces the peripheral wall 72 of the closure body 61. The side wall 76 is advantageously long enough so that the handle portion 74 extends to the arm body 65. For example, the base wall 75 is generally flush with the arm body 65 and / or the upper side 45A of the cover 45. This makes it easier to grip the handle portion 74.

[0100] The periphery of the peripheral wall 72 of the closure body 61 is provided with a seal 77, for example in the form of a rib or sealing projection 77A, which abuts with a sealing or press fit against the peripheral wall 71 or 72 when the closure body 61 is engaged with the supply receptacle 68 or the suction opening 12. In either case, the closure body 61 is therefore securely held in the supply receptacle 68 or the suction opening 12. In particular, the seal 77 seals the suction opening 12 when the suction hose SL is not inserted, so that dust and other debris from the dust collection container 36 or the dust collection chamber 21 cannot reach the surrounding environment. Nevertheless, an operator can easily move the closure element 60 from the supply receptacle 68 to the suction opening 12 or vice versa.

[0101] Insertion into the supply receptacle 68 or into the inlet 12 is possible, for example, by pressure application DV to the base wall 75 of the handle portion 74 .

[0102] However, it is also easy to cause actuation from the inlet 12 or the supply housing 68, despite the press-fit of the seal 77 into the peripheral wall 71 or 72. That is, the handle portion 74 can be grasped with a clamp-like gripping motion and pulled from the inlet 12 or the supply housing 68 in the direction opposite to the direction of the pressure actuation DV.

[0103] For example, the side walls 76 may be parallel to one another or, as in the illustrated embodiment, inclined at a small angle to one another, so that when an operator grips the handle portion 74, he can clamp (clip) the two side walls 76 together and move them towards one another, for example by applying a pressure load DO. Eventually, portions of the peripheral wall 72 and the seal 77 are moved away from the peripheral wall 71 or 72, so that the clamping fit of the closure body 61 to the supply receptacle 68 or the inlet 12 is released or at least no longer tight. In addition, it is advantageous if the side walls 76 flex under the pressure load when the operator acts on them, forming a concave grip, which makes handling easier. It is noted in this respect that ribbed structures or other similar gripping structures may of course also be provided on the handle portion or on the handle of the closure element to facilitate handling.

[0104] The suction device 10 advantageously comprises or is compatible with a container attachment 200. The container attachment 200 preferably has the same contour on its periphery as the suction device housing 20. The container attachment 200 can be stacked on the suction device 10, i.e. on its suction device housing 20, and can be connected thereto using the coupling means 58 already described.

[0105] For example, the container attachment 200 comprises a suction device housing 220 having a bottom wall 225 from which longitudinal side walls 226, 227, 228 and 229 project, which together define a receiving space 223 of the container attachment 200. The receiving space 223 is adapted to receive a suction hose SL.

[0106] A handle 224 and a storage space 223 protrude from the bottom wall 225. The handle 224 is designed like a strap, so that the container attachment 200 attached to the suction device housing 20 serves as a carrying handle for carrying the stack 9 consisting of the suction device 10 and the container attachment 200. This forms a stacking housing 20A for the suction device housing 20. The container attachments 200 form a stacking container 200A.

[0107] At the same time, the suction hose SL can be wrapped around the handle 224 so that it functions as a bandaging aid.

[0108] A passage 222 for the suction hose SL is provided in the bottom wall 225 and is aligned with the suction port 12 when the container attachment 200 is attached to the suction device 10. Additionally, lateral openings 221 for the suction hose SL are provided in the longitudinal side walls 28.

[0109] The longitudinal side walls 226 are provided with locking elements 251, 259 as coupling means 58, which are structurally matched and / or compatible with the locking elements 51 and 59. Thus, for example, the locking element 51 of the suction device 10 can be engaged with the locking element 259 to form a stack 9 consisting of the suction device 10 and the container attachment 200 stacked on top of it.

[0110] Legs (not visible in the drawings) corresponding to legs 54 and 55 are provided on the side of bottom wall 225 facing away from receiving space 223, which legs can engage with receiving portions 56 and 57 of suction device housing 20, so that in combination with the interlocking locking elements 51 and 259 of coupling means 58, secure retention of container attachment 200 to suction device 10 can be effected in the direction of stacking axis SR or in the stacking direction.

[0111] However, the coupling means 58 also quickly creates a fixed connection between the container attachment 200 and the suction device housing 20 transverse to the stacking axis SR.

[0112] Further containers, for example containers for transporting tools, may be stacked above or below stack 9. They may be coupled to container attachment 200 or suction device housing 20 using coupling means compatible with coupling means 58. For example, container attachment 200 may also be located below suction device housing 20 and connected thereto by coupling means 58 to form a stack. Furthermore, another container attachment 200 not shown in the drawings or another suction device 10 not shown may be stacked on top of, for example, upper container attachment 200 in FIG. 6 and connected thereto using coupling means compatible with coupling means 58 to form a stack.

[0113] In principle, it is now also possible to design the suction device 10 as a suction device that can be operated via a power supply network. However, the suction device 10 may not only be extremely compact, but also be flexibly usable in that it has a power supply 80 to which an energy storage device 170, for example a so-called battery pack, can be connected.

[0114] Two energy storage devices 170 of the same type, also referred to below as energy storage devices 170A, 170B, are provided for the power supply.

[0115] The power supply device 80 has an energy storage device receptacle 81 in the region of the suction turbine part 24. The energy storage device receptacle 81 extends between the longitudinal side wall 28 and the intermediate wall 30 over almost the entire distance between the longitudinal side wall 28 and the intermediate wall 30, so that two energy storage devices 170 can be arranged in the energy storage device receptacle 81.

[0116] The energy storage device receiving portion 81 includes an insertion opening 82, through which the energy storage device 170 can be inserted into the energy storage device receiving portion 81. The insertion opening 82 is defined by side walls 83, 84, which extend adjacent to, and in particular parallel to, the side wall 28 of the suction device housing 20 and the intermediate wall 30 of the suction device housing 20. Between the side walls 83, 84 extend a side wall or connecting wall 85 closer to the cover 45 and a side wall or thick wall 86 closer to or formed by the bottom wall 25. The energy storage device receiving portion 81 is defined by a bottom wall 87 opposite the insertion opening 82.

[0117] Device interfaces 90A, 90B, hereinafter also referred to generally as interface 90, are located on side walls 83, 84 to which an energy storage device 170 having an energy storage device interface 190 that mates with interface 90 is connectable.

[0118] For example, the interfaces 90, 190 include complementary longitudinal guide contours 91, 191 that are insertable into one another along the insertion axis SA. For example, the longitudinal guide contours 91, 191 include longitudinal grooves and longitudinal protrusions that can engage with one another.

[0119] The rear gripping contours 91A, 191A of the interfaces 90, 191 extend transversely to the respective insertion axes SA, thereby allowing the energy storage device 170 to be positively engaged (snugly engaged) with the device interface 90 transversely to the respective insertion axes SA.

[0120] Apart from the sliding mobility along the respective insertion axes SA, the interfaces 90, 190 are connectable to one another by form constraints based on the rear gripping contours 91A, 191A and the longitudinal guide contours 91, 191.

[0121] Furthermore, the interface 90, 190 includes a latching device 92, 192 for latching the energy storage device 170 to the device interface 90. The latching device 92 is designed, for example, as a latch receiving portion 93 into which latching projections 193 of the latching device 192 engage by locking (latching), so that the energy storage device 170 is immovably held at the interface 90 relative to the insertion shaft SA. The latching projections 193 are, for example, spring-loaded or resilient towards their locked position, in which they engage in the latch receiving portions 93 and can be released from the latch receiving portions 93 against the aforementioned spring load.

[0122] The interface 90, 191 includes a terminal arrangement 94, 194 for establishing an electrical connection between the energy storage device 170 and the suction device 10. The terminal arrangement 94, 194 includes energy supply terminals 95, 195 with different polarities, for example positive potential and ground, and data terminals 96, 196 for data transmission between the suction device 10 and the respective energy storage device 170. Such data transmission is intended, for example, as a digital bus data transmission, in particular with an I2C bus.

[0123] The energy storage devices 170 are advantageously structurally identical. Each energy storage device 170 has an energy storage device housing 171 having a longitudinal sidewall 172 on its longitudinal side 172A and end sidewalls 173, 174 extending therebetween. Extending between the sidewalls 172-174 is a bottom wall 175 and, opposite thereto, an interface wall 176 on which the energy storage device interface 190 is disposed. The interface wall 176 may have a stepped shape such that the data terminals 196 are spaced a greater distance from the bottom wall 175 than the power supply terminals 195.

[0124] Furthermore, the power supply terminals 195 and the data terminals 196 are arranged front to back with respect to the insertion axis SA. For example, the data terminals 196 are arranged at the front along the insertion axis SA, i.e., closer to the end wall 173, while the power supply terminals 195 are arranged at the rear along the insertion axis SA, i.e., closer to the end side wall 174. The energy storage device housing 171 has an interior space 177 protected from environmental influences and in which the batteries 178 are arranged. However, the batteries 178 heat up, for example, during discharging and charging, i.e., when the suction device 10 is operated with the energy storage device 170. However, the batteries 178 in the energy storage devices 170 are actively cooled; for this purpose, each energy storage device 170 has a fan 179. The fan 179 generates a cooling air flow KL, which flows into the interior space 177 through the energy storage device inlet opening 180 and exits therefrom through the energy storage device outlet opening 181. For example, the energy storage device inlet opening 180 is arranged in the bottom wall 175, while the energy storage device outlet opening 181 is arranged in the interface wall 176. In addition, the energy storage device inlet opening 180 and the energy storage device outlet opening 181 are arranged in opposite longitudinal end regions of the energy storage device 170, i.e., near the end walls 174 and 173, so that a cooling air flow KL, e.g., cooling air flow KLA in the case of energy storage device 170 and cooling air flow KLB in the case of energy storage device 170B, flows through the respective energy storage device 170, as it were, from back to front relative to the insertion direction or insertion axis SA.

[0125] The device interfaces 90 are located on opposite sides of the energy storage device housing 81, i.e., on the side walls 83 and 84. The energy storage device 170 is therefore housed within the energy storage device housing 81 by the opposing bottom walls 175.

[0126] To activate the latch devices 192, a plurality of operating elements 197 are provided on the longitudinal side walls 172 of the energy storage device housing 171. Thus, an operator can laterally and / or clamp the energy storage device housing 171 (like a clip) and simultaneously act on the two operating elements 197 located on the opposite longitudinal side walls 172, thereby decoupling the latch projections 193 from the latch receiving portions 93, so that the respective energy storage devices 170 can be removed from the device interface 90.

[0127] The accommodation 81 allows for convenient handling, because between the connecting walls 85, 86 and the energy storage devices 170 inserted in the energy storage device accommodation 81 there are operating spaces 88 and 89 where an operator can grasp operating elements 197, for example having a pressure surface or a contact surface. The operating spaces 88 and 89 are, so to speak, uniform or continuous control spaces, because there are no separate components between the energy storage devices 170 accommodated in the energy storage device accommodation 81. For example, if the energy storage devices 170 are accommodated in the energy storage device accommodation 81 with the energy storage device interfaces 190 facing each other, there must be an intermediate wall in the energy storage device accommodation 81 in which the device interfaces 90 are arranged.

[0128] In addition, due to the spacious design of the operating spaces 88 and 89, the operator can grasp the energy storage devices 170, for example, by their longitudinal side walls 172, and remove them from the energy storage device housing 81. However, this also makes the operation easier when inserting the energy storage devices 170 into the energy storage device housing 81, since in this case the operator can again grasp the longitudinal side walls 172 in order to plug each energy storage device 170 into the device interface 90 assigned to it.

[0129] The side walls 83, 84 are advantageously spaced apart from one another so that the energy storage device 170 connected to the device interface 90 has a space between their bottom walls 175 so that the cooling air flow KL can enter the space between the bottom walls 175.

[0130] Outlet openings 97 and 98, located in the side walls 83 and 84 of the energy storage device housing 81 near the device interface 90 and therefore near the energy storage device outlet opening 181 of the energy storage device 170, are used to exhaust the cooling air flow KL of the energy storage device 170 located at the device interface 90. The outlet openings 97 and 98, hereafter referred to as housing outlet openings due to their location in the energy storage device housing 81, are located near the bottom wall 87 so that little or no heat accumulates in the energy storage device housing 81.

[0131] The receptacle outlet opening 98 is in direct communication with the 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, leading from the receptacle outlet opening 98 to the ventilation opening 32 in the intermediate wall 30. The cooling air flow KLA of the energy storage device 170 arranged in the side wall 84 can therefore flow from the receptacle outlet opening 98 and be sucked in by the suction turbine 11 via the cooling air duct 99. In this case, the suction turbine 11 can also intensify the cooling air flow KLA, which is indicated diagrammatically by an arrow.

[0132] The energy storage device 170B can be cooled by a cooling air flow KLB which can flow from the energy storage device housing 81 through the outlet opening 97. The housing outlet opening 97 forms a duct inlet opening 97A for the cooling air duct 100.

[0133] It is easily possible to fluidly connect the accommodation outlet opening 97 to the ventilation opening 32 in the intermediate wall 30 or at least to the suction turbine inlet opening 11A of the suction turbine 11, for example by a hose connection line, so that the cooling air flow KLB flows directly to the suction turbine 11 or is suctioned by it.

[0134] However, in this case a different configuration has been chosen, in which the cooling air duct 100 does not lead directly to the ventilation opening 32, but rather to another cooling air duct 101 which is used to cool other components of the suction device 10, for example to cool the power supply device 140 and for permanent cooling of the suction turbine 11.

[0135] The suction turbine 11 is, for example, a so-called ventilator turbine or a turbine that is cooled or can be cooled by the suction flow carried by it.

[0136] Such permanent cooling of the suction turbine 11 is particularly important when it would otherwise not be able to draw in enough air on the inlet side, for example when the suction port 12 is clogged or blocked, when the filter element 13 is no longer clear, when the dust collection chamber 21 is overfilled, etc.

[0137] The suction turbine 11 is a so-called ventilation turbine. It has a suction turbine inlet opening 11A on its side facing the ventilation opening 32 and at least one, preferably several, suction turbine outlet openings 11B on its side facing away from the ventilation opening 32.

[0138] It is advantageous if a seal 11E is provided between the intermediate wall 30 on the one hand and the end face of the suction turbine 11 facing the intermediate wall 30 and having the suction turbine inlet opening 11A on the other hand, so that it abuts tightly against the intermediate wall 30 and the suction flow S can flow through the ventilation opening 32 but not into the suction turbine accommodation space 31 in which the suction turbine 11 is arranged.

[0139] The suction turbine receiving space 31 is delimited by a side wall 31A in the region of the suction turbine outlet opening 11B. Between the side wall 31A and the end face of the suction turbine 11, at or next to which the suction turbine outlet opening 11B is located, an elastically flexible suction turbine bearing element 11F is advantageously arranged, so that this suction turbine bearing element 11F and the seal 11E hold the suction turbine 11 in a vibration-damping manner in the suction device housing 20.

[0140] The suction turbine 11 includes a fan 11C, shown diagrammatically, and an electric drive motor 11D for driving the fan 11C. The electric drive motor 11D is cooled by the suction flow S during normal operation of the suction device 10, i.e., when the suction flow S is flowing.

[0141] The suction device 10 comprises an energizing device 140 for energizing the suction turbine 11, in particular the drive motor 11D. The energizing device 140 comprises, for example, one or more power electronic semiconductor elements 141, such as thyristors, FOSFETs, etc. The semiconductor elements 141 heat up during operation, i.e. when the suction turbine 11 is supplied with current.

[0142] The energizing device 140 is arranged on a printed circuit board 104 sandwiched between the longitudinal side walls 28 and 83 of the energy storage device housing 81 of the power supply device 80. The printed circuit board 104 also extends partially into the intermediate space between the side walls 28 and 31A. The energizing device 140 is connected to the device interfaces 90A, 90B, in particular to the energy supply terminals 95, via a number of wires 143. A number of wires 144 connect the energizing device 140 to the suction turbine 11.

[0143] Furthermore, the suction device 10 advantageously comprises a controller 150. The controller 150 comprises, for example, a processor 151 and a memory 152, in which at least one control program 153 for controlling the suction turbine 11 is provided.

[0144] An operator can control the suction device 10 using a number of operating elements 155 located on a control panel 156. The control panel 156 is located on the side wall 28.

[0145] The controller 150 is electrically connected to an operating element 155. By means of the operating element 155, the suction device 10 can, for example, be switched on or off. Furthermore, the power of the suction turbine 11 can be adjusted by means of the operating element 155. A display 157 is advantageously provided on the control panel 156, for example to display the status of the suction device 11.

[0146] The controller 150 also generates heat, the dissipation of which is advantageously achieved by the suction device 11, as will become clear below.

[0147] The cooling air duct 101 is fluidly connected to the housing outlet opening 97. Air can therefore enter the cooling air duct 101 via the housing outlet opening 97 (e.g., cooling air flow KLB). However, the cooling air flow KLB is already heated due to the cooling of the energy storage device 170B.

[0148] Ambient air, i.e. generally cool air, can enter the cooling air duct 101 as a cooling air flow KLC via a duct inlet opening 102. The duct inlet opening 102 is arranged, for example, near the bottom wall 25 in the region of the longitudinal side wall 28 facing the bottom wall 25. A protective grille 102A is advantageously arranged at the duct inlet opening 102.

[0149] The cooling air flow KLC enters via the duct inlet opening 102 into the duct section 103A of the cooling air duct 101, which extends between the printed circuit board 142 and the side wall 31A. The cooling air flow KLC therefore flows after the printed circuit board 142, or the cooling air flow KLC flows through the printed circuit board 142. In this case, the duct section 103A is selected so that the cooling air flow KLC essentially flows past the current-carrying device 140, i.e., past the semiconductor components 141, which heat up particularly during operation of the suction device 11. However, this heating, and in the worst case scenario, overheating, is effectively counteracted by the cooling air flow KLC.

[0150] At its end remote from the duct inlet opening 102, the duct section 103A leads to (merges into) a hose housing 104 in which the hose 110 and hence the tubular body 110A for guiding the cooling air are housed.

[0151] The hose receiving section 104 has, for example, a plug receiving section 105 into which the hose 110 is inserted and an air guide surface 106 in a wall 107 .

[0152] The cooling air flow KLC leaving the duct section 103A is guided via the air guide surface 106 to the inlet opening 111 of the hose 110. Due to the distance between the inlet opening 111 and the air guide surface 106 or the wall 107, the cooling air flow KLC can enter the inlet opening 111 unimpeded.

[0153] The design and / or cross-section of the plug-in receiving part 105 ensures that the hose 110 is compressed only to the extent that it is securely clamped in the plug-in receiving part 105, but not so much that its flow cross-section is no longer sufficient for the cooling air flow KLC to pass through. The plug-in stop 105A is advantageously located opposite the plug-in receiving part 105, against which the sheath of the cooling air hose can abut when it is inserted into the plug-in receiving part 105. The plug-in stop 105A is spaced a distance from the air guide surface 106. The inlet opening 111 is not closed by the air guide surface 106 due to the plug-in stop 105A.

[0154] Cooling air flow KLB may flow past circuit board 142 and / or into the gap between circuit board 142 and cover wall 34 and further into inlet opening 111 of cooling air hose 110, which then directs both cooling air flow KLB and cooling air flow KLC towards duct outlet opening 108. Cooling air hose 110 thus provides a common duct portion 103B for cooling air flows KLB and KLC.

[0155] The cooling air hose 110 has a hose section 112 that guides the cooling air flow KLC and / or the cooling air flow KLB through the suction turbine accommodation space 31 to the duct outlet opening 108. The duct outlet opening 108 is arranged in the intermediate wall 30 and leads into the space between the intermediate wall 30 and the filter element 13. There, the cooling air flow KLC and / or the cooling air flow KLB can flow in the direction of the ventilation opening 32 and be sucked in by the suction turbine 11.

[0156] The hose section 112 has an arcuate course. An end region 113 of the hose section 112 is held in the region of the duct outlet opening 108 in a receptacle 109, which is designed, for example, as a plug-in receptacle.

[0157] The cooling air flows KLA and KLB primarily cool the energy storage devices 170A and 170B, but also cool the suction turbine 11.

[0158] Furthermore, the cooling air flow KLC cools the energizer 140, but it also cools the suction turbine 11.

[0159] Since a smaller cooling air flow is required to cool the energy storage devices 170A, 170B, the cooling air ducts 99 and 100 advantageously have a smaller flow cross section than the cooling air duct 101, i.e. the cooling air duct 101 cools the power electronics, e.g. the semiconductor component 141. This measure contributes to a sufficient cooling air flow flowing through the cooling air duct 101 and not, so to speak, through and beside the cooling air ducts 99 and / or 100.

[0160] The duct inlet openings 97A, 98A and 102 are permanently open. The cooling air flows KLA, KLB and KLC can therefore permanently contribute to the cooling of the suction turbine 11.

[0161] Furthermore, a sensor 154 is arranged in the suction turbine 11, the sensor signal of which is evaluated by the controller 150. The sensor 154 may, for example, include or be a temperature sensor and / or a pressure sensor and / or a flow sensor. Due to the permanent cooling of the suction turbine 11 by means of the cooling air flows KLA, KLB and KLC, even when the suction flow S is blocked or not flowing, the sensor 154 has sufficient flow pressure so that it can transmit a valid temperature signal to the controller 150.

[0162] Finally, the controller 150 is designed to monitor the volumetric flow rate of the suction flow S, for example, using at least one control program 153 .

[0163] For example, the suction flow S has a volume flow rate VS with a pressure-dependent profile that depends on the pressure P. The characteristic curve VK of the volume flow rate of the suction flow S is shown schematically in Figure 28. At pressures P1, P2 and P3, which are, for example, negative or underpressure, the volume flow rate VS has values ​​VS1, VS2 and VS3 [l / s].

[0164] For example, the suction flow S does not fall below a minimum speed of, for example, 20 m / s, so that so-called dust classes are respected, according to which the suction device 10 always ensures adequate suction for this dust class.

[0165] Depending on the diameter of the suction hose SL, the required minimum velocity of the suction flow S results in a minimum value VSmin for the volume flow rate of the suction flow S, which is, for example, approximately 10 l / s for a hose diameter of 27 mm of the suction hose SL.

[0166] Due to the continuous air flow provided by the cooling air flows KLA, KLB and KLC, the controller 150 is, inter alia, able to calculate the volumetric flow rate characteristic VK of the suction flow S as well as other motor characteristics of the drive motor 11D of the suction turbine 11, not shown in the drawing, based on the motor characteristics MK1 and MK2, since both the characteristic curve VK and the motor characteristics MK1 and MK2 have a substantially constant, in particular substantially linear, profile in the region relevant for monitoring the volumetric flow rate or flow velocity of the suction flow S.

[0167] The motor characteristics MK1 and MK2 depend on the voltages U1 and U2 at which the drive motor 11D is operated and are proportional to the current profile of the motor current Imot, with which the drive motor 11D is energized by the energizing device 140.

[0168] The controller 150, in particular the controller program 153, controls the energizing device 140 and receives feedback therefrom, for example the present motor voltages, for example the motor voltages U1 and U2, and the respective motor current Imot for energizing the drive motor 11D.

[0169] If the motor characteristic MK1 or the motor current Imot falls below a value l1min or if the motor characteristic MK2 or the motor current Imot falls below a value l2min (which respectively correspond to a minimum value VSmin for the volumetric flow rate of the suction flow S), the controller 150 recognizes that the flow rate of the suction flow S is too low and provides, for example, a warning on the display 157. In this case, the controller 150 can alternatively or additionally output an acoustic warning to a speaker or other acoustic output means 158.

[0170] Advantageously, the carrying strap 350 is suitable for conveniently carrying the suction device 10, or the stack 9 consisting of the suction device 10 and the container attachment 200, or just the container attachment 200. The carrying strap 350 can be ergonomically adapted to the respective carrying situation by means of the length adjustment device 351.

[0171] The carrying strap 350 can be secured to the suction device 10 or to the container attachment 200. For this purpose, the carrying strap 350 has a securing device 340 at each of its longitudinal end regions.

[0172] The fixing device 340 can be engaged with the fixed receiving part 300 of the suction device 10 or, if desired, with the fixed receiving part 320 of the container attachment 200 .

[0173] The fixing device 340 has a base body 341 which is designed in the shape of a plate. The base body 341 has rear gripping contours 342 on their longitudinal sides which, in cooperation with the rear gripping contours 302 of the fixing receiving parts 300, act as longitudinal guides along which the fixing device 340 can be inserted into the respective fixing receiving part 300 along the insertion axis S300.

[0174] In the front and in the insertion direction relative to the insertion axis S300, the base body 341 has a further rear gripping contour 343, the front part 343A of which rests against the stop 303 of the fixed receiving part 300 at the end of the insertion movement along the insertion axis S300.

[0175] The bolt 304 of the locking receiver 300, which is actuatable using the actuation surface or actuation contour 305, can then reach its locking position, in which it reaches behind and / or above the rear gripping contour 344 of the locking device 340.

[0176] The bolt 304 is, for example, spring-loaded in its locked position and can be actuated towards its released position by a release actuation BE against the spring load by the actuation surface 305. The bolt 304 then disengages from the rear gripping contour 344, whereby the fixing device 300 can be moved outwards from the fixing receiver 300 which is designed as a bayonet receiver.

[0177] The rear gripping contours 343 and 344 extend between the rear gripping contours 342. The rear gripping contours 343 and 344 are located on opposite longitudinal end regions of the base body 341.

[0178] The fixed receiving parts 320 are also designed as plug-in receiving parts. A fixing device 340 can be inserted into the respective fixed receiving part 320 along the plug-in axis S320 or moved outwards from the fixed receiving part 320 along the plug-in axis S320.

[0179] With respect to the fixed receiving part 320, the rear gripping contours 343 and 344 of the fixing device 340 act as longitudinal guide contours which can engage with the longitudinal guide contours or the rear gripping contour 322 of the fixed receiving part 320 and guide the fixing device 340 along the insertion axis S320.

[0180] One of the rear gripping contours 342 of the fixing device 340, which is in front in the insertion direction with respect to the plug-in axis S320, abuts against a stop 323 at the bottom or end of the fixing receiver 320 with respect to the plug-in axis S320. A gripping contour for receiving this gripping contour 342 may optionally be provided there. The bolt 346 of the fixing device 340 can then engage in the locking contour 324 of the locking element 325 of the fixing receiver 320, so that the fixing device 340 is locked in the fixing receiver 320.

[0181] The bolt 346 is designed as a resilient tongue or element relative to the base body 341 and has an actuation surface 345 by means of which it can disengage from the locking contour 324 of the fixed receiving part 320. This is indicated in the drawing by an arrow or actuation BE2.

[0182] The securing device 340 has a plurality of strap receiving portions 347 for carrying straps 350. The carrying straps 350 can, for example, be pushed through push-through openings 348 in the strap receiving portions 347 and held in frictional engagement in the strap receiving portions 347 by suitable sling measures.

[0183] The fixed receiving portions 320 of the container attachment 200 are located on the longitudinal side walls 228 and 229 so that the carrying straps 340 can engage with the fixed receiving portions 320 that fill the receiving space 223 of the container attachment 200. Thus, the stack 9 can be hung, as it were, from the carrying straps 350 and can be carried comfortably.

[0184] On the other hand, the fixed receiving portion 300 allows the suction device 10 to be carried like a shoulder bag. For example, the fixed receiving portion 300 is arranged on one of the long side walls 26, 27, 28 or 29, and in particular on the long side wall 26 in the illustrated embodiment. In any case, it is advantageous if the fixed receiving portion 300 is arranged on the narrow side of the suction device housing 20.

[0185] It is advantageous if the fixed receptacle 300 is located in the longitudinal end region of the longitudinal side wall 26, i.e., near the longitudinal side walls 28 and 29, so that the carrying strap 350 can function as a strap or carrying handle suitable for hanging over the shoulder in the central part of the longitudinal side wall 26. [Explanation of symbols]

[0186] 10 suction device 9 stack 60 closing element 11 Suction turbine FS release position 12 Suction port 12 Suction hose SL V Closed position 13 Filter element 61 Closure body 14 Lower surface 62 Bearing Swivel axis SC 15 Upper surface 63 Bearing protrusion 16 Front Longitudinal Side - Front Side 63A Rear Gripping Contour 17 Rear longitudinal side 64 Bearing accommodation section 18 Longitudinal side with operating element 65 Arm body (65) 19 Longitudinal side of dust collection chamber 66 Upper side 20 suction device housing 67 closure element receiving section 20A Stacking Housing 68 Supply Receptacle 21 Dust collection chamber 69 68 surrounding wall 22 Exhaust port 70 Base of 68 23 Housing interior 71 12 peripheral wall 24 Suction turbine section 72 61 peripheral wall 25 Bottom wall 73 Bottom of 61 26 Front longitudinal side wall 74 Handle part Grip handle 74A 27 Rear longitudinal side wall 75 Base wall 28 Longitudinal side wall with control element 76 Side wall 29 Longitudinal side wall of dust collecting chamber 77 Seal 74A Seal protrusion 30 Intermediate Wall 31 Suction turbine housing space 31A Sidewall 80 Power Supply 81 Energy storage device housing 82 Insertion opening 32 Ventilation opening 83 Side wall to 28 84 30 to sidewall 34 Covering wall 85 Connecting wall top 35 Containment Area 86 Connecting Wall Under 36 Dust collection container 87 Bottom wall 37 Bottom wall 88 Operation space above 38 Side walls 89 Operating space below 39 Side wall 90 Device interface 40 filter container 91 longitudinal guide contour SA Insertion shaft 41 Receiving opening upper part 91A Rear gripping contour 42 Carrying handle Swivel bearing 42A 92 Latch device 43 Inside 36 93 Latch housing 44 Lower housing portion 94 Terminal device 45 Cover 45A Upper SD and OD 95 Energy supply terminal 46 Cover wall / cover body 96 Data terminal 47 Suction turbine part 97 83 accommodation outlet opening outside Duct inlet opening for 97A 100 48 Closure 98 Inside of the container outlet opening of 84 Duct inlet opening for 98A 99 49 Seal 99 Cooling air duct for 84 through 30 50 Cooling air duct for locking device 100 83 51 Locking element / Pivoting bolt 101 Cooling air duct labyrinth 52 locking element / projection 102 duct inlet opening 53 Swivel bearing for cover 54 Rear leg of housing 20 102A Protective grid 55 Front leg of housing 20 103A Duct part rear 105 56 Rear leg storage section 103B Common duct section 57 Front leg housing 104 Hose housing 58 Coupling means 105 Insertion receiving portion for hose SR Stacking Axis 106 Air Guideway 59 Locking Elements Bottom=52 107 Wall 108 32 duct outlet openings 109 Storage Unit 110 Cooling air hose 110A Tubular body 111 Entrance opening 112 Hose section bow (curved) 113 End area 140 Energizing device 141 Semiconductor elements 142 Printed Circuit Board 143 (multiple) wiring 144 11 (multiple) wires S suction flow 150 Controller 151 processors 11A Suction turbine inlet opening 152 Memory (storage device) 11B Suction turbine outlet opening 153 control program 11C Fan 154 Sensor / Pressure Sensor on 11 11D Drive motor 155 Operation element (control element) 11E Seal 156 Control Panel 11F Suction Turbine Bearing Element 157 Display 158 Output means Speaker 200 Container Attachment 200A Stackable Container 220 Housing 170 Energy storage device 221 Side opening (side passage) for SL 171 Energy storage device housing 222 Suction passage SL 172 Longitudinal side 223 Storage space 172A Longitudinal side 224 Handle 173 End side wall Front insertion direction 225 Bottom wall 174 End side wall Rear insertion direction 226 Front longitudinal side wall 175 Bottom wall 227 Rear longitudinal side wall 176 Interface wall 228 Left long side wall 177 Interior space 229 Right Longitudinal Sidewall 178 Battery 251 Locking element / Pivoting bolt 179 Fan (179) Cooling air flow (KLA, KLB, KLC)KL 259 Locking element bottom = 52 180 Energy storage device inlet opening 181 Energy storage device outlet opening 300 Fixed storage section 302 Post-grasp contour Vertical 190 Energy storage device interface (190A, 190B) 303 Rear gripping contour Bottom 191 Longitudinal guide contour 304 Volt 191A Rear Gripping Profile 305 Operating surface 192 Latch device 193 Latch protrusion 320 Fixed receiving portion 194 Terminal device 322 Rear gripping contour 195 Energy supply terminal 323 Rear grip contour Bottom 196 Data terminal 324 Control element for locking contour 197 192 325 Locking Elements 340 Fixation device 341 base body 342 Posterior grasping contour vertical 343 Rear grip contour Front view 344 Rear grip contour Back side 345 Working Surface 346 volts 347 Strap storage area 348 Push-through opening 350 Carrying Strap 351 Length adjustment device

Claims

1. An electrical device, in particular in the form of a suction device (10) or a machine tool, having a housing (20) in which at least one electrical load, in particular a drive motor (11D), is arranged, 1. An electric device comprising a power supply device (80) with an energy storage device housing (81) for powering said electric load, in particular said drive motor (11D), in which at least two device interfaces (90A, 90B) are arranged for removably connecting respective energy storage device interfaces (190A, 190B) of electric energy storage devices (170A, 170B), in particular battery packs, the device interfaces (90A, 90B) are disposed on opposing side walls (83, 84) of the energy storage device housing (81), so that the energy storage devices (170A, 170B) can be placed on the device interfaces (90A, 90B) with their bottom walls (175) facing each other.

2. 2. The electric device according to claim 1, wherein the energy storage device housing (81) has an insertion opening (82) through which the energy storage device (170A, 170B) can be inserted into the energy storage device housing (81), the insertion opening (82) facing a bottom of the energy storage device housing (81).

3. 2. The electrical device of claim 1, wherein the energy storage device accommodation (81) is configured as a pocket or compartment in the outer wall of the housing (20).

4. 4. The electrical device according to claim 1, wherein the energy storage device accommodation (81) has a depth such that when the energy storage devices (170A, 170B) are accommodated in the energy storage device accommodation (81), the energy storage devices (170A, 170B) do not protrude in front of the energy storage device accommodation (81) and / or in front of the outer contour of the housing (20) or protrude by a maximum of 10% of the length of the energy storage devices.

5. the device interface (90A, 90B) has a longitudinal guide contour (91) for guiding engagement with a longitudinal guide contour (191) of the energy storage device interface (190A, 190B) along the insertion axis (SA); and / or 4. The electrical device according to claim 1, wherein the device interface (90A, 90B) comprises a latching device (92) for fastening a latching device (192) of the energy storage device interface (190A, 190B).

6. 4. The electrical device of claim 1, wherein the energy storage device housing (81) has connecting walls (85, 86) extending between the opposing side walls (83, 84), the connecting walls (85, 86) defining an interior space for housing the energy storage devices (170A, 170B).

7. 7. The electric device according to claim 6, wherein an operating space (88, 89) for gripping the energy storage device (170A, 170B) when the energy storage device (170A, 170B) is accommodated in the energy storage device accommodation portion (81) is provided between at least one connecting wall (85, 86) and the energy storage device (170A, 170B) facing it, the operating space (88, 89) having a width corresponding to an adult finger and / or a width of at least 1.5 cm, preferably at least 2 cm, and / or the operating space (88, 89) extending continuously between the side walls (83, 84) of the energy storage device accommodation portion (81).

8. 7. The electrical device according to claim 6, wherein an operating space (88, 89) is provided between each connecting wall (85, 86) and the energy storage device (170A, 170B) facing it, and the energy storage devices (170A, 170B) can be clamped at their opposite longitudinal sides (172A) via the operating space (88, 89) when the energy storage devices (170A, 170B) are accommodated in the energy storage device accommodating section (81).

9. the energy storage device (170A, 170B) has an operating element (197) on at least one longitudinal side (172A) that engages with the energy storage device housing (81) when the energy storage device (170A, 170B) is housed in the energy storage device housing (81); 7. The electric device according to claim 6, wherein the energy storage device (170A, 170B) is detachable from the device interface (90A, 90B) in the energy storage device housing (81) by operating the operating element (197).

10. the operating element (197) is operable by engagement with an operating space (88, 89) of the energy storage device housing (81) between the connecting wall (85, 86) and the energy storage device (170A, 170B); and / or 10. The electrical device of claim 9, wherein the energy storage devices (170A, 170B) each have an operating element (197) on one of their opposite longitudinal sides (172A).

11. 4. An electric device according to any one of claims 1 to 3, characterized in that the electric device comprises or has at least two of said energy storage devices (170A, 170B) and / or forms part of a system comprising an electric device and at least two energy storage devices (170A, 170B).

12. The housing (20) forms a suction device housing (20), and an internal space (23) thereof is provided with a suction turbine (11) for generating a suction flow (S); The suction device housing (20) has an inlet (12) for passing the suction flow (S) and a dust collection chamber (21) for collecting dust contained in the suction flow (S); 4. The electrical device according to claim 1, wherein a filter element (13) for retaining dust in the dust collection chamber (21) is arranged between the dust collection chamber (21) and a suction turbine inlet opening (11A) of the suction turbine (11).

13. 4. The electrical device according to claim 1, wherein the housing (20) is configured as a stacking housing (20A) designed to form a housing stack (9) extending in the direction of a stacking axis (SR), under which at least one stacking container (200A) can be stacked and / or on which at least one stacking container (200A) can be stacked.

14. the electrical device having coupling means (58) for coupling its housing to a stacking container (200A) stacked above or below it along said stacking axis (SR); said coupling means (58) of the electrical device are configured to interact with the coupling means (58) of said stacking container (200A), so that said housing (20) is firmly connected to said stacking container (200A) transversely and parallel to said stacking axis (SR) by said coupling means (58); and / or The electrical device has a container attachment (200) that can be stacked along the stacking axis (SR) as a stacking container (200A) on top of or below the housing (20), the container attachment (200) and the housing (20) have coupling means (58) for securely coupling the housing (20) to the container attachment (200) parallel to and transverse to the stacking axis (SR); and 14. Electrical device according to claim 13, characterized in that the container attachment (200) has a storage space for at least one component of the electrical device, in particular a suction hose (SL).

15. 4. An electrical device according to any one of claims 1 to 3, characterized in that the electrical device is a mobile electrical device.

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