CN108143347B

CN108143347B - Suction device

Info

Publication number: CN108143347B
Application number: CN201711270576.XA
Authority: CN
Inventors: T·哈特曼; D·绍尔; H·勒姆
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2016-12-05
Filing date: 2017-12-05
Publication date: 2022-11-22
Anticipated expiration: 2037-12-05
Also published as: EP3338611B1; DE102016224105A1; CN108143347A; EP3338611A1

Abstract

The invention relates to a suction device for collecting and separating material particles and/or liquids from an air flow, having a housing in which an electric motor is arranged for generating the air flow, wherein the housing has an air inlet opening, through which the air flow can enter the suction device, and an air outlet opening, through which the air flow can leave the suction device, having a battery connection for receiving a battery, having at least one cyclone chamber, and having a collection container, which is designed for collecting the material particles and/or liquids, wherein the collection container is releasably connected to the housing of the suction device. It is also proposed that the cyclone chamber has a filter element, wherein the filter element is releasably connected to a housing of the suction device.

Description

Suction device

Technical Field

The present invention relates to a suction device.

Background

JP2015084810A describes a vacuum cleaner in which the energy supply is carried out by a hand-held power tool battery pack.

Disclosure of Invention

The invention relates to a suction device for collecting and separating material particles and/or liquids from an air flow, comprising: a housing in which an electric motor is arranged for generating an air flow, wherein the housing has an air inlet opening through which the air flow can enter the suction device and an air outlet opening through which the air flow can leave the suction device; a battery interface for receiving a battery; at least one cyclone chamber; and a collecting container, which is designed to collect material particles and/or liquid, wherein the collecting container is releasably connected to the housing of the suction device. It is also proposed that the cyclone chamber has a filter element, wherein the filter element is releasably connected to a housing of the suction device. By this measure, the suction device can be adapted to different fields of application. Depending on the expected particle size, a filter element can be used that is adapted to have a specific pore size that not only efficiently separates particles from the air stream but also allows maximum air flow. Furthermore, the filter element can also be replaced advantageously in the event of damage, which ensures a high filter performance of the suction device over its service life.

By "air flow" is to be understood, in particular, a particle flow, a liquid flow and/or a gas flow which is moved through the suction device in the forward movement direction. The "forward movement direction" of the air flow is to be understood in particular as the flow direction of the air flow in the open state of the suction device. The forward movement direction is here directed substantially from the air inlet opening of the suction device in the direction of the air outlet opening of the suction device. For generating the air flow, an electric motor is advantageously used, which is designed to drive at least one ventilation unit. The ventilation unit can be configured, for example, as a radial fan or as an axial fan.

A "hand-held power tool battery pack" is to be understood to mean, in particular, a combination of at least one battery cell and a battery pack housing. The battery pack is advantageously designed to supply the hand-held power tool, which is usually sold. The battery cells can be designed, for example, as lithium-ion battery cells having a nominal voltage of 3.6V. In a particularly advantageous manner, the battery pack of the hand-held power tool comprises at least five battery cells and a total operating nominal voltage of 18V, in order to be able to achieve a power-demanding operation of the suction device.

A "battery interface" is to be understood to mean, in particular, a unit which is designed to connect a hand-held power tool battery pack to a suction device in a releasable manner mechanically and electrically. In order to mechanically connect the housing of the hand-held power tool to the battery pack housing of the battery pack of the hand-held power tool, the battery interface advantageously has at least one force-locking and/or form-locking element. Preferably, the battery interface comprises a latching mechanism, wherein the latching connection is releasably formed by the actuating element. The actuating element can be arranged on the housing of the suction device or on the battery pack housing. Furthermore, the battery interface has at least one electrical contact element, which is configured to be electrically connectable to an electrical contact element of a battery pack of the hand-held power tool. Advantageously, the electrical connection element of the battery pack of the hand-held power tool is arranged on the outside of the battery housing.

By "cyclone chamber" is to be understood, in particular, a region of the suction device in which material particles and/or fluid particles are separated from the air flow by a centrifugal force separation means. Advantageously, the air flow is directed tangentially into the cyclone chamber, at least in regions. Preferably, the air flow is guided in the cyclone chamber at least in regions on a circular path. In particular, the air flow is guided around the filter element in the cyclone chamber at least in regions on a circular path.

Advantageously, the filter element is designed to filter out material particles and/or fluid particles when discharged from the cyclone chamber. In particular, the cyclone chamber is at least partially delimited by the filter element. Preferably, the cyclone chamber is at least partially designed as a hollow cylinder, wherein the outer diameter of the hollow cylinder is formed in particular by the collection container and the inner diameter of the hollow cylinder is formed in particular by the filter element. The filter element can be configured, for example, as a pleated filter. The outer surface of the pleated filter corresponds in particular to at least twice the outer circumference of the pleated filter. In particular, the filter element is releasably connected to the housing of the suction device by a bayonet connection. Advantageously, a simple and reliable connection of the filter element to the housing of the suction device can be achieved by means of the bayonet connection.

Advantageously, the collection container has a single opening. By configuring the collecting container with a single opening, a particularly simple collecting container which can be produced at low cost can be used advantageously.

In this case, the term "single opening" of the collecting container is to be understood to mean, in particular, a single air guide opening through which, in the connected state of the collecting container to the housing of the suction device, the air flow can enter the collecting container in its forward movement direction and can also exit the collecting container. A "releasable connection" is to be understood in the context of the present application to mean, in particular, a connection that can be released without tools. Advantageously, in the state in which the collection container is released from the housing of the suction device, the only opening of the collection container can be used for emptying the collection container.

In addition, the suction device has a first air channel with a transition opening, which is designed to guide the air flow into the collecting container, wherein the cross section of the first air channel, proceeding from the transition opening of the first air channel, changes, in particular decreases, at least in regions along the first air channel.

In particular, the cross-section of the transition opening of the first air passage is substantially perpendicular to the forward direction of movement of the air flow. Advantageously, the cross section of the transition opening of the first air channel can be configured substantially parallel to the cross section of the air inlet opening of the suction device. It is also conceivable for the two cross sections to enclose an angle of up to 15 ° with one another. It is also conceivable that the transition opening of the first air duct is configured as an air inlet opening of the suction device. The transition opening of the first air channel can advantageously be arranged on the outside of the housing of the suction device. "cross section" is to be understood in particular to mean a surface which can be traversed by an air flow in the forward direction of movement of the air flow.

Advantageously, the flow characteristics of the air flow can be adapted and optimized by at least regionally varying the cross section of the first air channel. The flow speed and thus the filtration efficiency of the centrifugal separator can be increased, for example, by reducing the cross section of the first air channel.

Preferably, the length of the region of the first air channel in which the cross section of the first air channel decreases corresponds to at least one time the diameter of the filter element. The "length" of the first air channel is to be understood in particular as the length of the first air channel along its central axis. The first air duct can extend both linearly and in a curved manner. Advantageously, by means of the long length of the region in which the cross section of the first air channel is reduced, the flow characteristics of the air flow can be optimally adapted and thus the efficiency and effectiveness of the centrifugal force separator can be increased.

Advantageously, the length of the region of the first air channel in which the cross section of the first air channel decreases corresponds to at least one time, advantageously at least 1.5 times, the diameter of the air inlet opening of the suction device. The diameter of the air inlet opening corresponds in particular substantially to the diameter of a suction hose which can be connected to a housing of the suction device. Advantageously, the flow cross section between the air inlet opening of the suction device and the transition opening of the first air channel, through which the air flow moves within the suction device, is substantially constant.

Furthermore, the first air channel tapers in the region in which the cross section of the first air channel decreases in the direction of the filter element. In particular, "the first air duct tapers in the direction of the filter element" is to be understood to mean that the wall of the first air duct which delimits the first air duct extends in the forward direction of movement of the air flow toward the filter element, or that the spacing of the wall of the filter element which delimits the first air duct decreases. Advantageously, by means of the tapering, the flow characteristics of the air flow through the first air channel can be further adapted and optimized.

Advantageously, the cross section of the first air duct is continuously reduced in the region of the reduced cross section of the first air duct. By "continuously tapering" is to be understood, in particular, that in the region in which the cross section of the first air duct is reduced, the cross section is reduced in successive sections of the same length in the forward movement direction of the air flow. In this case, the same-length section can have a length of in particular 20%, advantageously 10%, preferably 1%, of the length of the first air duct along its central axis. The cross section decreases in the forward movement direction of the air flow, in particular by at least 10%, advantageously by at least 5%, in particular by at least 1%, in sections of the same length. Particularly preferably, the reduction increases in successive sections of the same length. The flow behavior of the air flow can advantageously be further adapted by the cross section of the first air duct becoming smaller in this region.

Preferably, the first air channel is configured such that the air flow has a single forward direction of movement in the first air channel. In particular, no further air channels are arranged within the outer boundary of the first air channel, in which the air flow can move in a deviating direction of movement. Advantageously, there are no members within the outer boundary of the first air passage which may generate eddies or increased friction within the air flow.

Furthermore, the first air duct is advantageously at least partially formed integrally with the housing. In particular, the cross section of the first air duct is delimited by a single wall in the region in which the cross section of the first air duct is reduced. Advantageously, the first air duct does not have gaps, which may have a negative effect on the flow characteristics of the air flow and at which dust and contaminants from the air flow may accumulate.

Advantageously, the first air channel has an outflow opening which is arranged substantially perpendicularly to the transition opening of the first air channel. The air flow enters the first air channel in particular through the air inlet opening and exits the first air channel through the outflow opening. The transition opening of the first air duct is arranged in particular before the beginning of the region in which the cross section of the first air duct is reduced. Advantageously, the outflow opening of the first air duct is arranged in such a way that the air flow is guided from the first air duct directly into the cyclone chamber, in particular into the collecting container. Alternatively, it is also conceivable for the outflow opening and the transition opening of the first air duct to enclose an angle of up to 30 °, preferably up to 15 ° or 5 °, with one another.

Preferably, the cross section of the outflow opening is larger than the cross section of the transition opening, in particular by a factor of at least 1.5, advantageously by a factor of at least 4. This measure enables a further advantageous optimization of the flow characteristics of the air flow.

Furthermore, the first air channel, in particular the outflow opening of the first air channel, is arranged at least partially in the shape of a ring around the longitudinal axis of the suction device, whereby the flow characteristics of the air flow can be further optimized. The first air duct, in particular the outflow opening of the first air duct, extends in a circular ring shape about an axis which extends coaxially with the longitudinal axis of the suction device or coaxially with a parallel axis in the vicinity of the longitudinal axis of the suction device. The longitudinal axis of the suction device is advantageously configured as the axis of rotation of the air flow in the cyclone chamber. In particular, the longitudinal axis of the suction device can also be configured as the rotational axis of the electric motor of the suction device and/or as the longitudinal axis of the filter element. Particularly advantageously, the axis of rotation of the air flow in the cyclone chamber, the axis of rotation of the electric motor and the longitudinal axis of the filter element are coaxial with one another, which enables a particularly simple and compact construction of the suction device.

Advantageously, the first air channel, in particular the outflow opening of the first air channel, extends around the longitudinal axis of the suction device along an angular range of more than 30 °, in particular more than 60 °, advantageously more than 90 °. Preferably, the area in which the first air passage becomes smaller extends at one of the angular ranges. The flow characteristics of the suction device can thereby be further improved in order to increase the suction power and the filtration efficiency.

Preferably, the radial distance of the first air duct from the longitudinal axis of the suction device, in particular from the filter element, is substantially constant. Preferably, the radial spacing of the outflow opening of the first air duct from the longitudinal axis of the suction device, in particular from the filter element, is substantially constant. Alternatively, it is also conceivable for the radial distance to vary by up to 30%, advantageously by up to 15%. However, it is also conceivable that the radial distance is not constant and increases and/or decreases in sections. Advantageously, the radial distance of the first air duct from the longitudinal axis of the suction device is at any point no more than 40%, preferably no more than 30% and particularly preferably no more than 20% of the diameter of the collecting container.

Furthermore, it is advantageous to arrange an accessory connection on the transition opening of the first air duct. The accessory interface is configured for releasably connecting the accessory to a housing of the suction device. The attachment can be configured, for example, as a suction hose. Advantageously, the accessory interface is configured as part of the first air passage. In particular, the attachment interface forms a region of the first air channel in which the cross section of the first air channel is substantially constant. The attachment interface can be configured integrally with the housing of the suction device, in particular with the first air channel of the suction device.

Preferably, the air inlet opening and the air outlet opening of the suction device are arranged on sides facing away from one another. The term "sides facing away" is also to be understood in particular as sides of the suction device which are oriented substantially perpendicular to one another or substantially opposite sides. A particularly compact suction device can be advantageously achieved by this arrangement.

Advantageously, the cross section of the air inlet opening, in particular of the air inlet opening, of the suction device is substantially parallel to the cross section of the air outlet opening, in particular of the air outlet opening, of the suction device.

Further, the cross section of the air inlet port is equal to or smaller than the cross section of the air outlet port. Advantageously, the flow speed of the air flow on the air outlet opening is reduced by this measure. Thereby reducing noise generation and avoiding dust uplift by the discharged air.

Preferably, the air outlet opening is configured as an outflow opening of the second air channel, wherein the first air channel is arranged at least regionally adjacent to the second air channel. Preferably, the wall of the first air channel adjoins the wall of the second air channel at least in regions. By "regionally" is to be understood in this context that along the length of the first air channel at least 10%, preferably 25%, advantageously 50%, in particular 75% of the area is arranged adjacent to the second air channel. "adjacent" is to be understood in this context to mean, in particular, that the distance between the first air duct and the second air duct corresponds at most to the diameter of the first air duct, advantageously at most substantially to the wall thickness of the first or second air duct. Preferably, the first air channel and the second air channel are arranged at the same height. In this context, "arranged at the same height" is to be understood in particular to mean that a plane extending perpendicularly to the longitudinal axis of the suction device intersects the first and second air ducts, in particular substantially centrally. A particularly compact suction device can be achieved by this measure.

The battery interface is also arranged in particular in a battery compartment, wherein the battery compartment can be closed by means of a cover. The battery compartment is in particular at least partially formed integrally with the housing of the suction device. Advantageously, the space which can be closed by the battery compartment corresponds to at least 5%, advantageously at least 15%, preferably at least 25%, in particular at least 50%, of the space which is opened by the outer surface of the housing. Furthermore, the height of the housing corresponds in particular to at least 75%, advantageously 90% or preferably substantially to the height of the battery compartment. The height is measured along the longitudinal extent of the suction device. Here, "height of the housing" is to be understood in particular as the height of the region of the housing which does not overlap the cyclone chamber in the longitudinal extent of the suction apparatus.

In the closed state of the battery compartment, the battery interface, in particular the battery interface and the hand-held power tool battery pack, is advantageously completely received by the housing of the suction device, whereby the battery interface and the hand-held power tool battery pack are protected from damage and contamination. Advantageously, the cover portion at least partially constitutes an outer surface of the suction device. Advantageously, the cover is connected to the housing of the suction device in a rotationally movable manner. In the closed state, the hand-held power tool battery pack cannot be removed from the battery compartment.

In particular, the battery compartment is arranged at least in regions adjacent to the second air duct. Preferably, the wall of the second air duct adjoins the wall of the battery compartment at least in regions. By "regionally" is to be understood in this context that the battery compartment and the second air duct are arranged adjacent to one another in at least 40%, preferably 60%, preferably 75% of the area along the longitudinal extent of the battery compartment. "adjacent" is to be understood in this context to mean, in particular, that the distance between the battery compartment and the second air duct corresponds at most to the diameter of the first air duct, advantageously at most to substantially the wall thickness of the first or second air duct. Advantageously, the second air duct is partially delimited by a wall of the battery compartment.

Advantageously, the battery interface, the first air channel and the second air channel are arranged at the same height. In this context, "arranged at the same height" is to be understood to mean that a plane extending perpendicular to the longitudinal axis of the suction device intersects the battery compartment and the first and second air ducts. In particular, planes perpendicular to the longitudinal axis of the suction device, which extend at an average height through the battery compartment, the transition opening of the first air duct and the air outlet opening of the suction device, are spaced apart from one another by up to 20%, advantageously up to 10%, preferably up to 5%, of the width of the housing, in order to achieve a construction of the suction device that is as compact as possible.

In particular, the housing has at least one display element. The display element is in particular designed to display information relating to operation, thereby advantageously making it easier for the user to use the suction device. The display element is connected with the electronic control unit. Advantageously, the control unit can be designed to control the battery pack and/or the suction device of the hand-held power tool. The display element can be designed as a digital or analog display, for example as an LED display. Furthermore, it is also conceivable that the control unit can be controlled by at least one actuating element.

The information relating to operation may relate, for example, to the charge state of a rechargeable battery pack of the hand-held power tool. Advantageously, the display element is designed as a charge status display. Advantageously, the charge status display is arranged on an outer surface of the housing of the suction device. Preferably, the control unit and/or the charge status display are arranged on the upper side of the suction device, whereby the charge status display is always in the field of view of the user. In particular, the control unit and/or the display element are arranged adjacent to the first air channel, in particular above the first air channel.

Furthermore, the battery compartment, in particular the battery interface, is separated from the air inlet opening and the air outlet opening by a plane along the longitudinal axis of the suction device. This measure makes it possible to optimally utilize the installation space in the housing of the suction device.

Advantageously, the suction device has a gripping means with at least one gripping area, which can be fixed on the upper side of the housing. The suction device can be carried by the holding means during transport or operation of the suction device. The gripping means may be configured as a grip, in particular a handle.

Furthermore, the longitudinal extent of the holding means preferably corresponds substantially to the direction of the air flow into the first air channel and out of the second air channel.

Preferably, a plane intersecting the air inlet opening and the air outlet opening of the suction device and running parallel to the longitudinal axis of the suction device and a plane running along the longitudinal axis of the holding means and running coaxially to the longitudinal axis enclose an angle of less than 30 °, in particular less than 20 °, advantageously less than 10 °. This arrangement ensures that the air inlet opening and the air outlet opening are not blocked by the operator of the hand-held power tool when the holding device is used during operation of the suction device.

Furthermore, the holding means extends perpendicularly to the axis of movement, in particular the axis of rotation, of the cover of the battery compartment. The cover may be connected to the housing by a connection unit, such as a hinge. In the open state of the battery compartment, the cover requires additional space. By arranging the gripping means perpendicularly to the axis of movement of the cover, it can be ensured that this additional space does not overlap the gripping means.

Advantageously, the suction device has at least one accessory holder which is releasably connected to the housing of the suction device, wherein the accessory holder is provided for holding at least one accessory. If the accessory is not intended to be used, the accessory can be removed together with the accessory carrier in order to reduce or improve the weight and operability of the suction device.

Furthermore, the attachment carrier is provided for receiving a suction hose, wherein a winding axis of the suction hose is arranged parallel to a longitudinal extent of the holding means. Alternatively, it is also conceivable for the winding axis of the suction hose and the longitudinal extent of the holding means to enclose an angle of up to 20 °, advantageously up to 10 °, with one another. By this arrangement of the winding axis, it can be ensured that the hose does not interfere with the user during transport of the suction device.

Preferably, the battery compartment, the first accessory carrier, the air inlet opening, the second accessory carrier and the air outlet opening are arranged in this order about the longitudinal axis of the suction device. In particular, all elements are additionally arranged substantially at the same height. In this context, "arranged at the same height" is to be understood to mean, in particular, that a plane extending perpendicular to the longitudinal axis of the suction device intersects, in particular, substantially centrally, the battery compartment, the first accessory carrier, the air inlet opening, the second accessory carrier and the air outlet opening.

Drawings

The invention is explained in detail below on the basis of preferred embodiments. The figures are schematic and they show:

figure 1 is a perspective view of a suction device according to the present invention;

FIG. 2 is a perspective view of the collection container;

figure 3 a cross section of the housing of the suction device according to figure 1;

figure 4 a longitudinal section of the suction apparatus according to figure 1;

FIG. 5 is a perspective view of the battery cell in a closed state;

FIG. 6 is a perspective view of the battery cell according to FIG. 5 without the cover;

FIG. 7 is a perspective view of the inner housing of the suctioning device according to FIG. 1;

figure 8 is a longitudinal section of a first air passage of the suction device according to figure 1;

figure 9 is a top view of the suction device according to figure 1;

fig. 10 is a side view of the suction device according to fig. 1 without the collection container.

Detailed Description

Fig. 1 shows a perspective view of a suction device 10 according to the invention. The suction device 10 is designed as a centrifugal separator. The suction device 10 has a housing 12, which is releasably connected to a collection container 14, a filter element 16, a first attachment carrier 18 and a second attachment carrier 20. The suction device 10 is substantially cylindrically shaped and extends along a longitudinal axis 22. The suction device 10 has a cyclone chamber 24 which, in particular in the connected state, is at least partially delimited axially by the housing 12 and the collection container 14 and radially by the collection container 14 and the filter element 16. The housing 12 of the suction device 10 comprises an inner housing 11 (see fig. 4) and an outer housing 13. Advantageously, the filter element 16 is releasably connected to the inner housing 11, while the collection container 14 and the

accessory carriers

18,20 are releasably connected to the outer housing 13.

On the upper side of the housing 12 a gripping means 25 is arranged. In particular, the holding means 25 is fixed on the upper side of the housing 12. The gripping means 25 is designed as a carrying handle and has a grip region 27. The grip region 27 is designed in particular for being held by a hand of a user of the suction device 10. By means of the holding means 25, the suction device 10 can advantageously be carried during use or transport. The longitudinal extension of the gripping means 25 is substantially perpendicular to the longitudinal axis 22 of the suction device 10.

Along the longitudinal axis 22, the suction device 10 is divided into three regions: a cyclone region in which at least one cyclone chamber 24 is arranged; a housing region in which the housing 12 is at least partially arranged; and a carrying area comprising a gripping means 25. The inner housing 11 constitutes a partition wall 33 between the housing area and the cyclone area. The carrying area is separated from the housing area by an outer housing 13. Advantageously, the gripping means 25 are arranged in an intermediate position. In particular, the mirror plane of the holding means 25 lies on the longitudinal axis 22 of the suction device 10. Furthermore, the longitudinal extent of the holding means 25 corresponds to at least 70% of the diameter of the suction device 10, in particular of the diameter of the collecting container 14 or of the filter element 16, whereby a particularly ergonomically grasped region can be formed. Furthermore, the holding device 25 has two fastening elements 29. The fastening element 29 is designed as a lifting ring. The fastening element 29 provides a fastening possibility for a shoulder strap with two snap-in hooks, for example. The holding means 25 is connected to the housing 12 so as to be immovable relative to the housing 12. Alternatively, it is also conceivable for the holding means 25 to be mounted movably, for example in a pivotable manner, relative to the housing 12.

The collecting container 14 is configured substantially cylindrically around the longitudinal axis 22 of the suction device 10. The substantially cylindrical shape of the collecting container 14 is in particular designed as a truncated cone, in which the deviation of the top surface from the bottom surface is less than 15%. Advantageously, the average diameter of the collection container 14 is greater than its length along the longitudinal axis 22. Alternatively, it is also conceivable for the collecting container 14 to be divided along its longitudinal extent into different sections, the diameters of which differ from one another. As can be seen in fig. 2, the collection container 14 has a single opening 26. The collecting container 14 has a standing element 28, which is designed to increase the standing stability of the suction device 10. In particular, the diameter of the contact surface of the suction device 10 with the standing surface 30, in particular the diameter of the contact point of the suction device 10 with the standing surface 30, is increased by at least 10% by the standing element 28. Additionally, the stand-off element 28 is configured to make the suction device 10 more ergonomic. Advantageously, the standing element 28 has at least one holding area for this purpose, which can be formed, for example, as a recess. Advantageously, the standing element 28 is configured to absorb impacts. To this end, the standing element 28 may be constructed at least partially of an elastic material. It is also conceivable for the standing element 28 to comprise a forward movement unit, for example a roller. In addition to the circular configuration of the standing element 28 shown in the exemplary embodiment, it is also conceivable for the standing element 28 to have a substantially rectangular cross section which is compatible with the transport container present.

Advantageously, the collecting container 14 is at least partially transparent. In particular, the collecting container 14 is of transparent design such that, in the connected state with the housing 12, the interior of the collecting container 14, in particular the filter element 16, is visible from the outside. Advantageously, the state of the filter element 16 is visible from the outside. It is additionally conceivable for the collection container 14 to have markings by means of which the degree of filling of the collection container 14 can be identified. In order to ensure the highest possible capacity of the collecting container 14 for a given installation space/total volume, the volume enclosed by the collecting container 14 is at least as large as the volume enclosed by the housing 12, in particular the inner housing 11 and the outer housing 13. Advantageously, the volume enclosed by the collection container 14 corresponds to at least 250% of the volume enclosed by the casing 12.

The housing 12 is releasably connected to the collecting container 14 by means of at least one locking element 31. The locking element 31 is arranged on the housing 12, in particular on an outer side 32 of the housing 12. The locking element 31 is movably connected to the housing 12. The locking element 31 is designed to connect the housing 12 to the collection container 14 in a non-positive and positive manner. The housing 12 has in particular two locking elements 31, which are arranged opposite one another on an outer side 32 of the housing 12. The locking element 31 is releasably connected to a corresponding coupling element 34 of the collecting container 14. The joint element 34 is formed circumferentially, in particular tangentially, advantageously circularly. To connect the housing 12 to the collecting container 14, the housing 12 is seated on the single opening 26 of the collecting container 14 and the locking element 31 is actuated. In order to facilitate the connection process for the user, the radial distance of the locking element 31 from the longitudinal axis 22 is greater in the disconnected state than the radial distance of the coupling element 34 of the collection container 14 from the longitudinal axis 22. In this way, the position of the locking element 31 does not have to be aligned manually when sitting. By the following means: the joint element 34 of the collecting container 14 is designed in a surrounding manner, and the housing 12 can advantageously be seated on and connected to the collecting container 14 in a rotationally symmetrical manner about the longitudinal axis 22. Alternatively, it is also conceivable for the locking mechanism to be constructed upside down in the vertical direction.

Advantageously, the first accessory carrier 18 is configured for supporting the suction hose 36. In particular, the suction hose 36 is supported by the first accessory carrier 18 about a winding axis 38. Advantageously, the winding axis 38 extends perpendicularly to the longitudinal axis 22 of the suction apparatus 10. Furthermore, the first accessory carrier 18 has a further receiving compartment for an additional accessory. Advantageously, the winding axis 38 of the suction hose 36 is arranged parallel to the longitudinal extent of the holding means 25, whereby it can be ensured that the suction hose 36 does not interfere with the user during transport of the suction device 10.

The second accessory carrier 20 has three receiving openings 40 configured for receiving at least three accessory elements 42. Advantageously, the receiving opening 40 can be configured substantially circularly. The accessory elements 42 can be configured to be inserted into one another such that more than three accessory elements 42 can be received by the second accessory carrier 20. The interconnectable pipe elements 44 may be received in particular by the second accessory carrier 20.

Fig. 3 shows a cross section of the housing 12 of the suction device 10. The housing 12 of the suction device 10 has an air inlet opening 46, through which an air flow 48 can enter the housing 12, and an air outlet opening 50, through which the air flow 48 can leave the housing 12. The air flow 48 is drawn in its forward direction of motion. To generate the air flow 48, the suction device 10 has an electric motor 52 which drives a ventilation unit 54. The ventilation unit 54 can be designed, for example, as a radial compressor 55. Advantageously, the air inlet opening 46 and the air outlet opening 50 are arranged in the region of the housing of the suction device 10. The air inlet opening 46 is arranged at the same height as the air outlet opening 50. Furthermore, the air inlet opening 46 and the air outlet opening 50 are arranged on mutually opposite sides of the housing 12.

The air flow 48 is guided into the cyclone chamber 24, in particular into the collecting container 14, through the air inlet opening 46 and through the first air duct 56. The first air duct 56 is partially formed integrally with the housing 12. The first air duct 56 is arranged in a curved or tangential manner about the longitudinal axis 22 of the suction device 10, whereby the air flow 48 is advantageously directed tangentially into the collecting container 14. Within the cyclone chamber 24, the air flow 48 moves at least in sections on a circular path. Here, by centrifugal force, liquid or solid particles are separated from the air flow 48 and received by the collecting container 14. The air flow 48 leaves the cyclone chamber 24 via the filter element 16 (see longitudinal section of the suction device 10 in fig. 4) and moves through the ventilation unit 54 into the second air duct 60. The air flow 48 may in particular pass the partition wall 33 via the first air channel 56 and the second air channel 60. Advantageously, the first and/or

second air duct

56,60 is at least partially formed by the inner housing 11, in particular by the partition wall 33. The filtration of the air stream 48 can be carried out by a two-stage process in which the air stream 48 can be filtered first by centrifugal force and in a second step by the filter element 16. Advantageously, by this two-stage filtration process, the filter element 16 is more slowly worn away, thereby increasing the life of the filter element 16. In order to achieve a sufficient size of the cyclone chamber 24 and a sufficiently large filter surface of the filter element 16, the radial distance of the outer diameter of the filter element 16 from the longitudinal axis 22 corresponds to at least 45% of the radial distance of the outer diameter of the collecting container 14 from the longitudinal axis 22. Preferably, the outer diameter of the collecting container 14 is spaced apart from the outer diameter of the filter element 16 by at least 80% of the diameter of the suction hose 36 in order to ensure an optimum flow speed of the air flow 48 in the cyclone chamber 24.

The second air channel 60 at least partially laterally surrounds the electric motor 52 and directs the air flow 48 in the direction of the air outlet opening 50. As shown in fig. 3, the first air passage 56 is arranged adjacent to the second air passage 60. In the region in which the first air duct 56 and the second air duct 60 are arranged adjacent to one another, the plane extending along the longitudinal axis 22, proceeding from the longitudinal axis 22, always first intersects the second air duct 60 and then the first air duct 56.

The air inlet opening 46 of the suction device 10 is arranged on the side of the suction device 10 opposite the air outlet opening 50. The air inlet 46 is formed by an accessory interface 62. The attachment interface 62 is designed to produce a non-positive and/or positive releasable connection of the housing 12 to an attachment, for example, the suction hose 36. The connection between the attachment connection 62 and the suction hose 36 takes place here by means of mechanisms known to the person skilled in the art. The accessory interface 62 is fixedly connected with the housing 12. The accessory interface 62 is arranged in particular on a transition opening 64 of the first air duct 56.

A plane 66 extending along the longitudinal axis 22 divides the housing 12 into a first region, which includes the air inlet opening 46 and the air outlet opening 50, and a second region, which includes the power supply for the electric motor 52. The energy supply of the electric motor 52 is effected via a hand-held power tool battery pack 68, which can be electrically and mechanically connected to the suction device 10 via a battery interface 70. The suction device 10 has a control unit, not shown, which is arranged in the current circuit between the hand-held power tool battery 68 and the electric motor 52 and by means of which the electrical components of the suction device 10 can be controlled and/or regulated. The suction device has, in particular, an operating switch 73, which is arranged on the upper side of the housing 12, in particular of the outer housing 13. The operating switch 73 is electronically connected to the control unit.

The hand-held power tool battery 68 has a battery housing 72 in which a battery cell 74 is arranged. The hand-held power tool battery pack 68 is advantageously arranged in a closable battery compartment 76. The battery compartment 76 is shown in perspective in fig. 5 (closed) and 6 (without a cover). In the closed state of the battery compartment 76, the cover 78 of the battery compartment 76 partially forms the outer surface of the housing 12 of the suction device 10. The battery compartment 76 is partially formed integrally with the housing 12. The cover portion 78 is rotatably supported about a rotation axis 82. Advantageously, the axis of rotation 82 of the cover 78 is arranged perpendicular to the longitudinal axis 22 of the suction device 10 and perpendicular to the longitudinal extension of the holding means 25. This arrangement ensures that the cover 78 of the battery compartment 76 does not act on the gripping means 25 when it is opened. The electrical connection of the hand-held power tool battery pack 68 to the suction device 10 is made via the electrical contact elements 86 of the battery interface 70 with corresponding electrical contact elements arranged on the battery pack housing 72 (see fig. 7). In order to releasably connect the hand-held power tool battery pack 68 to the battery interface 70, the hand-held power tool battery pack 68 is mounted by being pushed into the battery compartment 76. It is also conceivable to mount the battery pack 68 by another mounting method, for example, by insertion. For guiding the battery pack 68 of the hand-held power tool in the battery compartment 76, the battery compartment 76 has a guide rail 88. The battery pack 68 of the hand-held power tool is pushed into the battery compartment 76, in particular parallel to the longitudinal extent of the holding means 25. Advantageously, the mounting direction of the battery pack 68 of the hand-held power tool is configured substantially parallel to the standing surface 30. However, it is also conceivable for the battery pack 68 of the hand-held power tool to be mounted vertically or along the longitudinal axis 22 in the battery compartment 76. Furthermore, an ergonomically advantageous installation angle of 45 ° +/-15 ° with respect to the standing surface 30 is also advantageous. Advantageously, the releasable mechanical connection of the battery housing 72 to the battery compartment 76 is realized by a latching mechanism. The battery compartment 76 can be opened by actuating the actuating element 84. Advantageously, the actuating element 84 has a latching projection 90, which, in the closed state of the battery compartment 76, establishes a force-locking and form-locking connection with the cover 78. The actuating element 84 is designed as a push button. The actuating element 84 is configured to be actuated in the insertion direction of the battery pack 68 of the hand-held power tool. The cover 78 is advantageously biased by a spring element, not shown, in the direction of the open state of the battery compartment 76. By virtue of this pretensioning, the actuation of the actuating element 84 directly leads to an autonomous rotational movement of the cover 78 relative to the housing 12, thereby making it possible to change the hand-held power tool battery pack 68 particularly quickly and easily.

In order to protect the electrical components of the suction device 10 from the liquid drawn in by the air flow 48 in the interior of the housing 12, a restriction unit 92 (see fig. 4) is arranged between the filter element 16 and the ventilation unit 54 in the forward movement direction of the air flow 48. The limiting unit 92 is designed to interrupt the air flow 48 if the amount of liquid in the collecting container 14 exceeds a certain value.

A cross section of the air inlet opening 46 and the first air passage 56 is shown in fig. 8. Fig. 8 shows the suction device 10 without the suction hose 36. The sectional plane extends parallel to the longitudinal axis 22 and perpendicular to the air inlet openings 46.

The first air passage 56 is configured to direct the air flow 48 into the collection container 14. The air flow 48 enters the first air channel 56 through the air inlet opening 46 and exits the first air channel 56 again through the outflow opening 102. The first air duct 56 comprises two

regions

98,99, wherein in the region 99 the flow cross section of the air flow 48 is substantially constant, while in the region 98 the cross section 100 of the first air duct 56 continuously diminishes. The transition opening 64 of the first air passage 56 marks in particular the end of the region 99.

The first air passage 56 is partially integrally configured with the inner housing 11. In particular, the first air duct 56 is formed integrally with the housing 12, in particular the inner housing 11, in a region 98 in which the cross section 100 of the first air duct 56 is continuously reduced. The transition opening 64 of the first air duct 56 corresponds to a cross section 94, which is arranged substantially parallel to a cross section 96 formed by the air inlet openings 46. The cross section 96 of the air inlet opening 46 is in particular substantially equal in size to the cross section 94 of the transition opening 64 of the first air channel 56. The air inlet opening 46 is associated with an accessory port 62, wherein the accessory port 62 is fastened to the housing 12. It is also contemplated that the first air passage 56 may be integrally constructed with the accessory interface 62.

After the transition opening 64 of the first air duct 56 in the forward movement direction of the air flow 48, the first air duct 56 has a region 98 in which the cross section 100 of the first air duct 56 becomes smaller. This region 98 is delimited by the walls of the housing 12, in particular the walls of the inner housing 11, of the transition opening 64 and of the outflow opening 102. The cross section 100 of the first air duct 56 is in particular tapered in the region 98. Through the outflow opening 102, the airflow 48 may enter the cyclone chamber 24. On the side of the first air duct 56 opposite the outflow opening 102, the air duct is bounded by walls which in the region 98 have an angle of inclination of substantially 20 ° with respect to a horizontal plane relative to the longitudinal axis. The cross section 100 extends between this wall of the housing 12 which delimits it and the outflow opening 102 and is always arranged parallel to the longitudinal axis 22 of the suction device 10. Here, the cross section 100 of the first air duct 56 follows the curvature of the first air duct 56 in the region 98 as can be seen in fig. 3. The cross section 104 of the outflow opening 102 is arranged substantially perpendicular to the cross section 94 of the transition opening 64. In the region 98, the first air duct 56 tapers continuously in the direction of the cyclone chamber 24, so that the air flow 48 is advantageously guided in a tangential path into the cyclone chamber 24. Kinematically viewed, the air flow 48 moves in the forward movement direction behind the air inlet openings 46 with a translational degree of freedom to the transition opening 64 of the first air passage 56. After the air inlet opening 46 in the forward movement direction of the air flow 48, an additional vertical degree of freedom is released in the region 98, by means of which the air flow 48 can move into the cyclone chamber and, after the outlet opening 102, a translational, in particular horizontal, third degree of freedom is released. In this case, the horizontal degree of freedom is released, in particular, gradually over the extent of the region 98, whereby a discontinuous widening of the cross section can advantageously be avoided and flow losses can be minimized.

As shown in fig. 9, the suction device 10 advantageously has a display element 106. Advantageously, the display element 106 is arranged on the outer housing 13. In particular, the display element 106 at least partially forms an exterior surface of the housing 12. The display element 106 is designed, for example, as a charge status display. The charge status display is provided to display the charge status of the rechargeable battery pack 68 of the hand-held power tool. The display element 106 can be switched on or off, in particular, by operating the switch 73. Advantageously, the charging state of the hand-held power tool battery pack 68 can be permanently displayed by the display element 106 during operation of the suction device 10. Advantageously, the display element 106 is electronically connected to the control unit. In order to ensure the most compact possible configuration of the housing 12, the display element 106 is arranged adjacent to the first air duct 56, in particular above the first air duct 56. To visually illustrate the above in more detail, the air flow 48a is schematically illustrated in the first air passage 56 and the air flow 48b is schematically illustrated in the second air passage 60. The charge status can be displayed by, for example, 5 LEDs or by the remaining operating time. Furthermore, it is also conceivable that additional information about the degree of filling of the connected hand-held power tool battery 68, suction device 10 or collection container 14 can be displayed by means of the display element 106.

Preferably, the filter element 16 is arranged coaxially with respect to the collection container 14. Alternatively, it is also conceivable for the filter element to be arranged eccentrically with respect to the collecting container 14 by up to 15% of the outer diameter of the collecting container 14. In order to provide particularly high filtration performance, the length of the filter element 16 corresponds to at least 50%, advantageously at least 75%, of the length of the collecting container 14. In order to simultaneously provide a stable and easily releasable connection without tools, the filter element 16 is releasably connected to the housing 12, in particular to the inner housing 11, by means of a bayonet connection. The filter element 16 has a first axial end 110, at which a non-positive and/or positive connection of the filter element 16 to the housing 12 is made, and a second axial end 112, which is designed in a gas-tight manner. In particular, the second axial end 112 of the filter element 16 is configured as a standing foot 114, whereby the suction device 10 can be placed on the standing foot 114 of the filter element 16, advantageously if the collecting container 14 is detached from the housing 12 (see fig. 10). Advantageously, the first accessory carrier 18 terminates along the longitudinal axis 22 substantially at the same height as the standing foot 114 of the filter element 16, thereby further stabilizing the standing of the suction device 10.

Claims

1. A suction device for collecting and separating material particles and/or liquid from an air flow (48), the suction device having:

a housing (12) in which an electric motor (52) is arranged for generating an air flow (48), wherein the housing (12) has an air inlet opening (46) through which the air flow (48) can enter the suction device (10) and an air outlet opening (50) through which the air flow (48) can leave the suction device;

a battery interface (70) for receiving a hand-held power tool battery pack (68);

at least one cyclone chamber (24); and

a collection container (14), wherein the collection container (14) is releasably connected to a housing (12) of the suction device (10),

wherein the cyclone chamber (24) has a replaceable filter element (16) which is releasably connected to a housing (12) of the suction device (10).

2. Suction device according to claim 1, characterized in that the collecting container (14) has a single opening (26).

3. The suction device according to claim 1 or 2, characterized in that the suction device (10) has a first air channel (56) having a transition opening (64), which is designed to guide the air flow (48) into the collecting container (14), wherein the cross section of the first air channel (56) changes from the transition opening (64) of the first air channel (56) at least in regions along the first air channel (56).

4. A suction arrangement according to claim 3, characterized in that the length of the area (98) of the first air passage (56) in which the cross-section of the first air passage (56) becomes smaller corresponds to at least one time the diameter of the filter element (16).

5. A suction arrangement according to claim 3, characterized in that the length of the area (98) of the first air passage (56) in which the cross-section of the first air passage (56) becomes smaller corresponds to at least one time the diameter of the air inlet opening (46) of the suction arrangement (10).

6. A suction arrangement according to claim 4 or 5, characterized in that the cross-section of the first air channel (56) is continuously smaller in the area (98).

7. A suction arrangement according to claim 3, characterized in that the air flow (48) has a unique forward direction of movement in the first air channel (56).

8. A suction arrangement according to claim 3, characterized in that the first air channel (56) is at least partially constructed in one piece with the housing (12).

9. The suction arrangement as claimed in claim 3, characterized in that the first air channel (56) has an outflow opening (102) which is arranged perpendicularly to the transition opening (64) of the first air channel (56).

10. Suction arrangement according to claim 9, characterized in that the cross section of the outflow opening (102) is larger than the cross section of the transition opening (64).

11. A suction arrangement according to claim 3, characterized in that the first air channel (56) is arranged to curve at least partly around the longitudinal axis (22) of the suction arrangement (10).

12. A suction arrangement according to claim 3, characterized in that the first air passage (56) extends around the longitudinal axis (22) of the suction arrangement (10) along an angular range of more than 30 °.

13. A suction arrangement according to claim 3, characterized in that the cross-section of the first air channel (56) decreases from the transition opening (64) of the first air channel (56) at least in regions along the first air channel (56).

14. The suction device according to claim 10, characterized in that the cross section of the outflow opening (102) is larger than the cross section of the transition opening (64) by a factor of at least 2.

15. The suction arrangement, as set forth in claim 10, characterized in that the cross section of the outflow opening (102) is greater than the cross section of the transition opening (64) by a factor of at least 4.

16. The suction arrangement according to claim 9, characterized in that the outflow opening (102) of the first air channel (56) is arranged to curve at least partially around the longitudinal axis (22) of the suction arrangement (10).

17. The suction device according to claim 12, characterized in that the first air channel (56) extends around the longitudinal axis (22) of the suction device (10) along an angular range of more than 60 °.

18. A suction arrangement according to claim 12, characterized in that the first air channel (56) extends around the longitudinal axis (22) of the suction arrangement (10) along an angular range of more than 90 °.

19. The suction device as claimed in claim 9, characterized in that the outflow opening (102) of the first air channel (56) extends around the longitudinal axis (22) of the suction device (10) along an angular range of more than 30 °.

20. The suction device as claimed in claim 9, characterized in that the outflow opening (102) of the first air channel (56) extends around the longitudinal axis (22) of the suction device (10) along an angular range of more than 60 °.

21. The suction device as claimed in claim 9, characterized in that the outflow opening (102) of the first air channel (56) extends around the longitudinal axis (22) of the suction device (10) along an angular range of more than 90 °.

22. Suction arrangement according to claim 1 or 2, characterized in that the housing (12) is substantially cylindrical,

the shell is provided with a first end surface provided with a holding area, a second end surface opposite to the first end surface and a peripheral surface,

an air inlet opening (46) and an air outlet opening (50) are arranged on the circumferential surface of the housing on both sides facing away from each other,

a first air channel (56) is provided in the housing, from which a flow of air (48) entering via an air inlet opening (46) can be conducted into the collecting container (14),

the collection container (14) being mountable on a second end face of the housing,

the cyclone chamber is delimited at least partially axially by the housing and the collecting container and radially by the collecting container and the filter element,

the outflow opening of the first air channel is arranged on the second end face of the housing and faces the collecting container.