阅读说明：本技术 旋流吸尘器 (Cyclone dust collector ) 是由 H-P.阿诺尔德 P.拉克什曼 I.艾琳 J.巴豪森 K.施密茨 于 2021-05-31 设计创作，主要内容包括：本发明涉及一种旋流吸尘器(1),其具有吸嘴(2)、分离装置(3)和风机,所述风机设置为在所述旋流吸尘器(1)的抽吸运行期间将带有抽吸物的空气通过所述吸嘴(2)吸入到所述分离装置(3)中,其中,所述分离装置(3)具有带有纵轴线(5)的柱形的分离滚筒(4)、切向的流体进入路径(6)、轴向的空气排出路径(7)和相对于所述空气排出路径(7)分开构成的颗粒排出路径(8)。为了实现一种尽可能不受干扰的旋流吸尘器(1),其还在结构形状方面可以优化,建议所述颗粒排出路径(8)具有沿所述分离滚筒(4)的切向指向的颗粒排出口(9),使得颗粒空气流能相对于所述纵轴线(5)基本上横向地离开所述分离滚筒(4)。(The invention relates to a cyclone dust collector (1) having a suction nozzle (2), a separating device (3) and a fan which is provided to suck air with suction into the separating device (3) through the suction nozzle (2) during a suction operation of the cyclone dust collector (1), wherein the separating device (3) has a cylindrical separating drum (4) with a longitudinal axis (5), a tangential fluid inlet path (6), an axial air outlet path (7) and a particle outlet path (8) which is formed separately from the air outlet path (7). In order to achieve a cyclone dust collector (1) which is as undisturbed as possible and which can also be optimized with regard to its structural shape, it is proposed that the particle discharge path (8) has a particle discharge opening (9) which is directed tangentially to the separating drum (4) such that a particle air flow can leave the separating drum (4) substantially transversely with respect to the longitudinal axis (5).)

1. A cyclone dust collector (1) is provided with a suction nozzle (2), a separating device (3) and a fan, the fan is arranged to suck air with suction through the suction nozzle (2) into the separating device (3) during a suction operation of the cyclonic cleaner (1), wherein the separating device (3) has a cylindrical separating drum (4), the separating drum (4) having a longitudinal axis (5), a tangential fluid inlet path (6), an axial air outlet path (7) and a particle outlet path (8) which is formed separately from the air outlet path (7), characterized in that the particle discharge path (8) has a particle discharge opening (9) directed tangentially of the separation drum (4), so that the particle air flow can leave the separating drum (4) transversely with respect to the longitudinal axis (5).

2. Cyclonic cleaner (1) according to claim 1, wherein the particle discharge path (8) and/or the fluid inlet path (6) are located in a cross-section of the separating drum (4) oriented orthogonally to the longitudinal axis (5) of the separating drum (4).

3. Cyclonic cleaner (1) as claimed in claim 1 or 2, characterized in that the separating apparatus (3) has a coarse particle trap container (10) downstream of the particle discharge opening (9) in the flow direction.

4. Cyclonic cleaner (1) as claimed in claim 1, characterized in that the air outlet path (7) has two air outlets (12), the air outlets (12) each being formed on two opposite end sides (11) of the separating drum (4).

5. Cyclonic cleaner (1) as claimed in claim 4, wherein the air outlet (12) has a grille (13).

6. Cyclonic cleaner (1) as claimed in claim 5, characterized in that the grilles (13) are concavely curved in the direction of the respectively opposite grille (13).

7. Cyclonic cleaner (1) as claimed in claim 4 or 5, characterized in that the end sides (11) of the separating drum (4) are configured not to be parallel to each other.

8. Cyclonic cleaner (1) as claimed in claim 7, characterized in that the end sides (11) of the separating drum (4) are oriented at an acute angle (α) to each other.

9. Cyclonic cleaner (1) as claimed in claim 7, characterized in that the end sides (11) of the separating drum (4) enclose an angle of 30 to 60 degrees with each other.

10. Cyclonic cleaner (1) as claimed in claim 1, characterized in that the air discharge path (7) has a fine dust filter.

11. Cyclonic cleaner (1) as claimed in claim 5, characterized in that the air discharge path (7) has a fine dust filter which is arranged behind the grille (13) in the flow direction of the air flow exiting the separating drum (4) through the grille (13).

12. Cyclonic cleaner (1) as claimed in claim 5, wherein the grille (13) has a plurality of grille openings (15), wherein the grille openings (15) have an opening diameter in a direction from a grille centre (16) to a grille edge (17)Reduced dimensional variations.

13. Cyclonic cleaner (1) as claimed in claim 1, characterized in that the separating drum (4) has a baffle (18) adjacent to the particle discharge opening (9), which baffle is connected unequally to the coarse particle trap container (10) of the separating device (3) in such a way that the baffle (18) covers in a strip a partial region of the container opening (19) of the coarse particle trap container (10).

14. Cyclonic cleaner (1) as claimed in claim 1, characterized in that the largest cylinder diameter (D) of the separating cylinder (4)_T) Is greater than the maximum drum length (L) of the separating drum (4) in the direction of the longitudinal axis (5).

Technical Field

The invention relates to a cyclone vacuum cleaner having a suction nozzle, a separating device and a fan which is provided to suck air with suction into the separating device through the suction nozzle during a suction operation of the cyclone vacuum cleaner, wherein the separating device has a cylindrical separating drum with a longitudinal axis, a tangential fluid inlet path, an axial air outlet path and a particle outlet path which is formed separately from the air outlet path.

Background

Cyclonic cleaners of the kind described above are well known in the prior art. They have a separating drum of cylindrical design as a central element, which has either a constant drum diameter or, as a rule, a tapering diameter with respect to the direction of the longitudinal axis. The suction air flow is drawn into the separating drum by means of a fan and flows there in the circumferential direction of the separating drum, wherein the larger particles settle down due to gravity and reach the collecting container. The air stream freed from the larger particles reaches the outside via a so-called immersion tube, which is axially guided out of the separating drum. A fine dust filter is then usually attached.

For example, DE 102015106663 a1 discloses a centrifugal separator, in particular for a household vacuum cleaner, having an inlet channel for introducing an air flow with particles, a particle separator, a separation chamber associated with the particle separator, and an outlet channel for discharging the air flow. In the particle separator, the air flow with the suction particles undergoes a rotational movement due to its flow velocity, wherein the centrifugal force acting on the suction particles leads to a separation of the particles from the carrier air flow. The particles are guided by gravity into the separation chamber, while the carrier air stream leaves the separation chamber via a so-called submerged tube.

In cyclone cleaners with tangential separators of this type, it is disadvantageous that longer suction particles, mainly hairs, can become entangled in the immersion tube and clog the separating drum. In particular the annular gap connecting the separating drum and the separating chamber may also be jammed. Furthermore, the tangential separators known from the prior art have a relatively large size, in particular a relatively large longitudinal extension, which is caused by the successive arrangement of the separating drum and the separating chamber in the axial direction.

Disclosure of Invention

Starting from the prior art described above, the object of the invention is therefore to provide a cyclone dust collector which can be operated without the separating drum becoming jammed and thus as undisturbed as possible. It is a further object of the invention to provide a cyclonic cleaner having a smaller or more geometrically advantageous shape relative to the prior art.

In order to solve the above-mentioned technical problem, it is proposed that the particle discharge path of the separating drum has a particle discharge opening directed tangentially of the separating drum, so that the particle air stream can leave the separating drum substantially transversely with respect to the longitudinal axis.

Thus, according to the invention, the particle air flow is not directed axially out of the separating drum, but rather substantially transversely thereto, so that the particle air flow leaves the separating drum in a tangential direction. The particles are thus not transferred into the collecting chamber by the action of gravity, but rather are discharged from the separating drum due to centrifugal force, i.e. through the particle discharge opening. Preferably, the particle discharge opening can be located, for example, in an axial plane of symmetry of the separating drum, i.e. preferably centered with respect to the longitudinal axis of the separating drum. The width of the separating drum in the direction of the longitudinal axis is preferably of similar size to the inlet of the tangential fluid entry path to maintain the particle air stream flowing into the separating drum at a high velocity. In contrast, the particle discharge opening of the particle discharge path can be designed to be larger, so that the aspirate particles can be separated without interference into the collecting vessel located behind it. In contrast to conventional tangential separators with axial particle discharge of the separating drum, the invention provides different design shapes, which are characterized by a larger size ratio of the diameter of the separating drum to the width. By means of the constructive form according to the invention, the separation of the main particle fraction in the separating drum is carried out during less than one revolution in the circumferential direction of the separating drum. In contrast, in a typical tangential separator, the aspirate particles are separated by making multiple turns. Overall, therefore, a more rapid separation of the aspirate particles is achieved according to the invention. The circumferential section of the separating drum between the fluid inlet path and the particle discharge path preferably has an angle of 10 to 270 degrees. The larger the angle, the more particles and smaller particles can be separated. The circumferential wall of the separating drum can be shaped in different ways. For example, the separation chamber may have a constant diameter with respect to its axial width. Alternatively, however, it is also possible to provide the curvature such that the diameter of the separating drum changes in the axial direction, for example tapers in the direction of the end face. Furthermore, the circumferential wall of the separating drum can also have a diameter which varies in the circumferential direction, in particular the separating drum can accordingly have a helically configured circumferential wall. The reduced diameter of the separating drum in the circumferential direction may contribute to the success of the separation, but is structurally more complex than, for example, a constant diameter of the separating drum based on the circumferential direction. Overall, the invention makes it possible to realize a separating device having a more compact design than in the prior art, rather than an elongated design, and furthermore makes it possible to achieve a simple and operationally safe separation of the aspirate particles from the particle air stream without being limited by the maximum achievable separation performance of the particle size.

In particular, it is proposed that the particle discharge path and/or the fluid inlet path lie in a cross section of the separating drum which is oriented orthogonally to the longitudinal axis of the separating drum. According to this preferred embodiment, the separated suction particles leave the separating drum orthogonally to the longitudinal axis of the separating drum. In principle, however, it is also possible for the particle discharge path and/or the fluid inlet path to have an angle different from 90 degrees with respect to the longitudinal axis. This is advantageous, for example, when the circumferential wall of the separating drum has a spiral-shaped structure.

It is also proposed that the separating device has a coarse particle collection container downstream or downstream of the particle discharge opening in the flow direction. The coarse trap container serves to catch, collect and store the separated coarse particles, which leave the separating drum through the particle discharge opening. In contrast to the prior art, the coarse particle collection container is therefore not located behind the separating drum relative to its longitudinal axis, but rather is located alongside the separating drum, viewed axially. The separating apparatus is thus shaped in a new manner as a whole and provides advantages in terms of installation of the separating apparatus in the cyclone cleaner housing.

It is preferably proposed that the air outlet path of the separating drum has two air outlets, each of which is formed on two opposite end sides of the separating drum. The air outlet is used for discharging the air from which coarse particles are removed. The separating drum of cylindrical design has two opposite end sides which preferably each have an air outlet. It is particularly preferred that the entire end face is designed as an air outlet. The air outlet serves to cause an air flow cleaned of coarse dirt particles to flow out in an at least initially axial direction of the separating drum. This embodiment advantageously eliminates the immersion tubes which are conventional in the prior art and which project into the separating drum and can lead to coarse dirt deposits there.

It is particularly proposed that the air outlet has a grille. By means of these grilles, the air stream freed of coarse particles can leave the separating drum from both sides. The grid guides the vortex in the separation drum and maintains the vortex effect. The distance of the meshes from each other, together with the opening diameter of the fluid entry path, determines the maximum particle diameter that can circulate in the separation drum. By separating the coarse dirt particles by means of centrifugal force, the suction material particles circulating in the separating drum are separated less clearly. In particular in the theoretical limit diameter range of the suction particles which can be separated in the first place, these particles remain in the separating drum. Likewise, particles smaller than the limiting diameter may also be partially separated into the coarse capture container. This separation accuracy or resolution can be optimized by using the proposed grid. In principle, the grating can be configured in any shape, for example flat, convex, concave, conical with the tip pointing towards the separation drum or conical with the tip pointing outwards from the separation drum. However, it is preferred that the webs are of concave design, i.e. are curved in the direction of the respectively opposite web. Whereby a high flow velocity inside the separating drum can be maintained as long as possible.

It can be provided that the end sides of the separating drum are not parallel to one another, in particular are oriented at an acute angle to one another, particularly preferably enclose an angle of 30 to 60 degrees between them. It can be provided that the grids are arranged so as not to be parallel to one another, so that the width of the separating drum widens in the direction of the particle discharge opening. It is particularly preferred that the grids are oriented mirror-symmetrically to each other about a plane orthogonal to the longitudinal axis of the separating drum.

It is proposed that the air outlet path has a fine-dust filter, wherein the fine-dust filter is preferably arranged behind or downstream of the grate in the flow direction of the air flow flowing out of the separating drum through the grate. The fine dust filter serves to trap all particles that may pass through the grid. An arrangement of several fine dust filters can also be used to further optimize the filtering result.

It is proposed that the grid has a plurality of grid openings, wherein the grid openings have a size variation with decreasing opening diameter in a direction from the center of the grid to the edge of the grid. In principle, the opening diameter of the grid openings can also be constant or vary irregularly. Preferably, however, the grid openings have a size variation which specifies a smaller opening diameter at the edge of the grid but a larger opening diameter at the center of the grid. In this case, this helps to keep the particles circulating in the separating drum in a circulating path as close as possible to the axis and thus facilitates the separation of coarse dirt particles.

In addition, the separating drum can have a spoiler adjacent to the particle discharge opening, which spoiler is connected to the coarse particle collection container of the separating device in an uneven manner such that it covers a partial region of the container opening of the coarse particle collection container in a strip-like manner. The separation of the particles in the separation drum is based on the centrifugal force of the particle air stream. Due to the relatively high speed there, the separating effect is greatest immediately after the particles have entered the separating drum. During the further cycle, the local radius of the drum wall and the local velocity of the particles within the separation drum determine the flow of the particles in the direction of the drum wall. The particles can then exit the separation drum through a particle discharge port and enter a coarser particle trap vessel. It is also determined by the spoiler which particles are separated. The baffle is designed as a guide plate which is connected adjacent to but not flush with the container opening of the coarse-particle trap container. The spoiler covers at least partially the container opening of the coarse particle collection container and therewith determines the separation mechanism of particles and air in the transition region from the separation drum into the coarse particle collection container. In addition, the spoiler prevents the formation of secondary vortices and the resulting return of the already separated particles into the separating drum. The angle between a straight line connecting the longitudinal axis of the separating drum and the end face edge of the end side of the spoiler and the particle discharge direction from the separating drum into the coarse particle collecting container is preferably in the range from 0 to 90 degrees. Here, a smaller angle leads to an increased flow through the coarse particle collection container, a larger angle worsens the separation rate, so that a good intermediate degree for the optimum function of the separation device is determined in the intermediate angle range of preferably 25 to 65 degrees.

It is also proposed that the largest cylinder diameter of the separating cylinder is greater than the largest cylinder length of the separating cylinder in the direction of the longitudinal axis. Compared to conventional tangential separators, the embodiment proposed here is that the separating drum of the invention looks compact compared to more elongate conventional separating drums which advantageously have a longitudinal extent. This also results in advantages in terms of the installation position of the separating drum in the interior of the cyclonic cleaner.

Drawings

The invention is further illustrated below with reference to examples. In the drawings:

figure 1 shows a cyclonic cleaner according to the invention in an external three-dimensional view,

figure 2 shows the separating apparatus of a cyclonic cleaner in a three dimensional view,

figure 3 shows the separating apparatus in a further view,

figure 4 shows a separating drum according to an alternative embodiment,

figures 5a to 5d show different drum circumferential sections of the separating drum,

figure 6a shows a principle sketch of a separating device in cross-section,

figure 6b shows a separating device according to a possible embodiment in cross-section,

fig. 7 shows a cross-sectional view of the separating device according to fig. 6a, VII,

figure 8 shows the transition area between the spoiler of the separation drum and the container opening of the coarse particle collection container of the separation device,

fig. 9 shows a grille for the air discharge path of the separating apparatus.

Detailed Description

Fig. 1 shows firstly an exemplary cyclonic vacuum cleaner 1 with a suction nozzle 2 designed as a removable accessory device and a base device 20. The cyclonic cleaner 1 is designed here only as a hand-held cleaner by way of example, but can alternatively be designed as a floor cleaner, in which a flexible suction hose is used between a suction nozzle 2 arranged on the suction tube and a base unit 20 rolling on the floor. Also, the cyclonic cleaner 1 may be a battery-powered device. Furthermore, the cyclone dust collector 1 may be designed as a self-propelled dust collecting apparatus.

In this selected example, the cyclonic cleaner 1 has a handle 21 of variable length and a grip 22 with a switch 14 arranged on the handle. The handle 21 can be telescopically designed, for example, so that the user can adjust the position of the handle 22 to his height in a personalized manner. The switch 14 is used, for example, to activate and deactivate the cyclonic cleaner 1. It is furthermore possible to select a specific power level of the fan, the rotational speed of the cleaning elements, such as bristle rollers, or other device parameters by means of the switch 14.

Figures 2 and 3 show an exemplary embodiment of the separating apparatus 3 of the cyclonic cleaner 1. The separating device 3 has a separating drum 4 with a longitudinal axis 5. Furthermore, the separating drum 4 has a fluid inlet path 6 for the air rich in suction, an air outlet path 7 for discharging the cleaned air, and a particle outlet path 8 for separating coarse particles into a coarse particle collection container 10 located downstream or downstream thereof in the flow direction. The separation drum 4 and the coarse particle collection container 10 are connected to one another via the particle discharge opening 9 of the particle discharge path 8 and the container opening 19 of the coarse particle collection container 10, wherein in the transition region a spoiler 18 is provided on the separation drum 4 (see in particular fig. 6a, 6b and 8). The separating drum 4 has two opposite end sides 11 in the longitudinal direction of the longitudinal axis 5, which are air outlets 12 for cleaned air. The front sides 11 have, for example, a grid 13, which in each case has a plurality of grid openings 15 which run from a grid center 16 to a grid edge 17, are distributed, for example, uniformly distributed and have an opening cross section of the same size.

The separating cylinder 4 has a cylinder diameter D measured in the direction of extension of the longitudinal axis 5_TAnd a drum length L. The drum wall 27 of the separating drum 4 is flat in the axial direction, i.e. the drum diameter D_TIs constant in the direction of the longitudinal axis 5.

In contrast, fig. 4 shows an exemplary separating drum 4 with a drum wall 27 which is curved in the axial direction, so that the drum diameter D_TAxially from the outside inwards.

Fig. 5a to 5d show exemplary drum circumferential sections 23, 24, 25, 26 of an alternative design, which are cut parallel to the longitudinal axis 5 for better illustration. The drum circumferential section 23 has, for example, a flat cutting edge relative to the longitudinal axis 5 or the direction of extension of the separating drum 4. Alternatively, the drum circumferential section 24 has the shape of an arcuate circular section. The drum circumferential section 25 is substantially U-shaped in cross section, while the drum circumferential section 26 is V-shaped. The drum circumferential sections 23, 24, 25, 26 shown can be understood as an alternative embodiment of the drum wall 27. However, it is also possible to form the drum wall 27 together by a sequential arrangement, in which, for example, some circumferential sections are shaped flat and the circumferentially subsequent sections have, for example, a spherical curvature.

Fig. 6a and 6b show a cross section of the separating device 3, wherein fig. 6a shows an idealized sketch and the separating device 3 according to fig. 6b shows a design relevant for practice. As shown, the separation drum 4 has a fluid entry path 6 oriented tangentially thereto and a particle exit path 8 oriented substantially also tangentially. The separating drum 4 has a spoiler 18 in the region of the particle discharge opening 9 of the particle discharge path 8, which spoiler at least partially covers the container opening 19 of the coarse particle collecting container 10, so that an undercut is formed behind the spoiler 18 in the flow direction. The fluid entry path 6 and the particle exit path 8 may have an angle to each other in the range from about 10 to 270 degrees. The angle is measured between the longitudinal axis of the fluid inlet path 6 and the longitudinal axis of the particle discharge path 8. For example, the angle is approximately 180 degrees here, since the fluid inlet path 6 and the particle outlet path 8 extend substantially anti-parallel to one another.

Fig. 7 shows the separating device 3 according to the viewing direction VII in fig. 6a and 6 b. It can be seen that the end sides 11 of the separating drum 4 are not oriented parallel to one another, but rather have an angle to one another, which is approximately 20 degrees here. The grate 13 (not shown in fig. 7) arranged on the end side 11 is, for example, of flat design, wherein it is alternatively also possible for the grates to be, for example, concavely curved into the interior of the separating drum 4 or convexly protruding outward from the separating drum 4.

Fig. 8 shows the transition region between the separation drum 4 and the coarse collection container 10. In this transition region, the separating drum 4 has a spoiler 18 which partially screens off the container opening 19. The angle β formed by the straight line extending from the longitudinal axis 5 of the separating drum 4 to the end face of the spoiler 18 and the straight line extending of the particle discharge path 8 is, for example, approximately 40 degrees here. Alternatively, other angles in the range of 0 to 90 degrees are possible, wherein a small angle β results in an increased flow through the grit trapping vessel 10, while a large angle β deteriorates the separation rate. Preferably, the angle β is in the range of 25 to 65 degrees.

Fig. 9 shows an exemplary design of a grate 13 for separating the end sides 11 of the drum 4. For example, the grid 13 has a plurality of grid openings 15 which have opening diameters which decrease from a grid center 16 of the grid 13 to a grid edge 17 of the grid 13

The invention now functions in that the particles are introduced into the separating drum 4 by means of a fan (not shown) through a straight (fig. 6a) or curved (fig. 6b) fluid inlet path 6. There, the particle flow is guided in the circumferential direction of the drum wall 27 of the separating drum 4 to the particle discharge opening 9, which particle discharge opening 9 fluidically connects the separating drum 4 to the coarse particle collection container 10. The separation of coarse particles into the coarse particle collecting container 10 is performed based on the centrifugal force and the structural conditions of the separation drum 4. In particular to determine whether particles can enter coarse captureThe limiting diameter in the container 10 is determined by the (optionally partial) diameter D of the drum_TAnd the flow rate of particles present therein. Furthermore, the spoiler 18, which limits the particle discharge path 8, determines which particles can pass through the particle discharge opening 9. In particular, the spoiler 18, on account of its shape and size, on the one hand determines the limiting diameter for separating coarse and fine particles or particles and air, and on the other hand it prevents the formation of secondary vortices and the associated particles which have already been separated in the coarse collection container 10 from being returned into the separating drum 4 again. The angle of the particle discharge opening 9 which is set free by means of the spoiler 18 is preferably in the range from 25 to 65 degrees in order to achieve a satisfactory separation ratio on the one hand and to retain particles below the limiting diameter in the separation drum 4 on the other hand.

The drum length L of the separating drum 4 preferably corresponds substantially to the width of the particle discharge opening 9, but wherein the end sides 11 may be oriented non-parallel to each other, so that the gas flow is maintained at a relatively high speed along the drum wall 27 between the fluid inlet path 6 and the particle discharge path 8. The air flow remaining in the separating drum 4 after the separation of coarse dirt particles, together with the fine dust particles having a diameter below a defined limit diameter, then leaves the separating drum 4 via the end face 11 of the separating drum 4 and can be conveyed, for example, to a subsequent fine dust filter in the flow direction. The grate 13 associated with the end side 11 guides the circulating flow on the one hand relative to the interior of the separating drum 4, while allowing the air and fine dust particles to exit at the end side. Preferably, the grids 13 are of concave configuration, i.e. curved in the direction of the respectively opposite grid 13, so that a high flow rate can be ensured for as long as possible. Furthermore, the separation can be optimized by a special shaping of the drum wall 27 of the separating drum 4 (see fig. 5a to 5d), wherein the particle flow in the separating drum 4 can be guided, for example, by means of the curved drum circumferential section 24 or the V-shaped drum circumferential section 26 in the region of the axial center (relative to the longitudinal axis 5) of the separating drum 4 more closely.

According to the preferred embodiment of the separating device 3 according to the invention shown here, the fluid inlet path 6 and the particle outlet path 8 are centrally located in the separating device 3 with respect to the extension of the longitudinal axis 5. With grating 13The air outlets 12 are furthermore arranged symmetrically with respect to the axial symmetry plane of the separating drum 4. Although not shown here, the grid 13 may also be of convex or conical configuration. It is also possible for the grating 13 to have a different number, arrangement, configuration and size of grating openings 15 than here. In particular, the grid openings 15 can also have the same opening diameter as one anotherEquidistantly arranged or at different distances from each other. Furthermore, the drum wall 27 of the separating drum 4 can also be of helical design, so that the drum diameter D_TVarying in the circumferential direction of the separating drum 4. This can facilitate the separation process for coarse particles. The separating cylinder 4 of the separating device 3 according to the invention as a whole preferably obtains an outer shape in which the cylinder length L is smaller than the cylinder diameter D_T. In contrast to the prior art, the separation of the majority of the coarse particles takes place in less than one complete cycle in the separating drum 4. If this results in an unclear separation of coarse and fine particles, the grate 13 arranged on the end side 11 is used, if appropriate, to store the coarse particles which have not been separated in the separating drum 4, and then they can leave the separating drum 4, for example after a further circulation, via the particle discharge 9 and be collected in the coarse particle collection container 10.

List of reference numerals

1 cyclone dust collector

2 suction nozzle

3 separating device

4 separating drum

5 longitudinal axis

6 fluid entry path

7 air discharge path

8 particle discharge path

9 particle discharge outlet

10 coarse particle collecting container

11 end side

12 air outlet

13 grid

14 switch

15 grille opening

16 center of the grid

17 grid edge

18 spoiler

19 container opening

20 basic equipment

21 handle

22 handle

23 drum circumferential section

24 drum circumferential section

25 drum circumferential section

26 drum circumferential section

27 drum wall

Diameter of opening

D_TDiameter of the drum

L length of cylinder

Angle alpha

Angle beta