Cyclone arrangement, arrangement and method for operating an arrangement

Abstract

Cyclone arrangement (10), comprising: a cyclone pre-separator (1) for separating particles from an air stream, wherein the cyclone pre-separator (1) has a particle outlet (2) on its underside for discharging the separated particles, a bag (3) with a bag volume (4) for receiving the particles discharged from the particle outlet (2), a container (5) which provides a container volume (6) for receiving the bag (3) and on which the cyclone pre-separator (1) is mounted, wherein the cyclone pre-separator (1) comprises a pressure adjustment device (7) with which: the pressure in the container volume (6) can be reduced below the pressure in the bag volume (4) so ​​that the bag (3) expands in the container volume (6), and / or the pressure in the container volume (6) can be set above the pressure in the bag volume (4) so ​​that the bag (3) is vented, wherein the pressure adjusting device (7) comprises a fluid line (8) arranged in the cyclone pre-separator (1) and opening at the bottom of the cyclone pre-separator (1), with which the container volume (6) can be fluidically connected or is connected to a vacuum area of ​​the cyclone pre-separator (1).

Description

[0001] The invention relates to a cyclone arrangement with a cyclone pre-separator for separating particles from an air stream, a bag for receiving the particles and a container in which the bag is arranged and on which the cyclone pre-separator is placed.

[0002] The cyclone arrangement described is typically used as a pre-separation stage for a vacuum cleaner. The cyclone pre-separator is connected to the vacuum cleaner, so that the airflow drawn in by the vacuum cleaner first passes through the cyclone pre-separator and then through the vacuum cleaner. The cyclone pre-separator separates a portion of the particles contained in the airflow and discharges them into the bag, where the particles are collected. Consequently, fewer particles are conveyed into the vacuum cleaner. This is particularly advantageous if the vacuum cleaner has a vacuum cleaner bag and / or filter that separates particles and needs to be changed at a certain fill level / level of contamination.

[0003] The container is conveniently designed as a stand for the cyclone pre-separator – that is, it serves to support the cyclone pre-separator. In particular, the particle collection container is designed to be placed stably on a level surface, even with the cyclone pre-separator attached.

[0004] The cyclone arrangement is used particularly in the craft sector, where it is operated as a separation pre-stage for the bag vacuum cleaners commonly used there.

[0005] The product "Ultimate Dust Deputy Kit" from the company "Oneida Air Systems" is known from the prior art. It comprises a container and a cyclone pre-separator. The container has a generally cuboid shape. It serves to hold a bag in which the particles separated by the cyclone pre-separator are collected. A valve with a hose, which can be connected to the suction hose of a vacuum cleaner, is provided on one of the container's perimeter walls as a pressure control device. The pressure control device allows the pressure inside the container to be reduced, thus expanding the bag within the container's volume.

[0006] From DE 603 ​​20 238 T2, a device for a vacuum cleaner is known which has a centrifugal separator chamber and a collection container for the particles separated by the centrifugal separator, wherein the centrifugal separator comprises an inlet for dust-laden air, a particle outlet for particles separated by the cyclone separator and an outlet for cleaned air, wherein the outlet is connected to a vacuum source and the particle outlet via a tube section ending in the collection container and wherein the collection container comprises a dust bag for receiving the dust particles.

[0007] One object of the invention is to modify the aforementioned cyclone arrangement in such a way that it is easier to handle.

[0008] The problem is solved by a cyclone arrangement according to claim 1. The cyclone pre-separator comprises a pressure adjustment device with which the pressure in the container volume can be adjusted relative to the pressure in the bag volume, so that the pressure in the container volume can be set below the pressure in the bag volume so that the bag expands in the container volume, and / or the pressure in the container volume can be set above the pressure in the bag volume so that the bag is vented.

[0009] The pressure adjustment device is therefore part of the cyclone pre-separator and thus, unlike in the prior art, is not located on the outside of a circumferential wall of the vessel. This makes the cyclone assembly easier to handle, and in particular reduces the risk of collisions with the pressure adjustment device during use, which could damage the device.

[0010] As mentioned, the pressure adjustment device serves to lower the pressure in the container volume than the pressure in the bag volume, allowing the bag to expand within the container. This ensures the largest possible bag volume is available, allowing as many particles as possible to be collected before the bag needs to be replaced.

[0011] Alternatively or additionally, the pressure adjustment device can also be used to set the pressure in the container volume above the pressure in the bag volume. In this way, a bag filled with particles can be vented, making it as compact as possible for transport and / or disposal. Furthermore, venting allows residual gases to be evacuated, reducing the risk of the bag bursting, especially under stress, such as during transport. The particles can, in effect, be "sealed" inside the bag.

[0012] The term "pressure in the container volume" refers in particular to the pressure of that part of the container volume that surrounds the bag.

[0013] Furthermore, an arrangement is provided comprising a cyclone arrangement as discussed above and a suction device fluidically connected to the cyclone pre-separator for providing the negative pressure.

[0014] Furthermore, a procedure for enforcing the order is provided, comprising the step: Operating the arrangement in a suction mode in which the suction device provides a negative pressure to the cyclone pre-separator, so that an airflow containing particles is drawn into the cyclone pre-separator and at least a proportion of the particles are separated in the cyclone pre-separator and collected in the bag.

[0015] The procedure further includes the step: before or during the suction mode: setting the pressure in the container volume below the pressure in the bag volume by means of the pressure adjustment device, so that the bag expands in the container volume.

[0016] Alternatively or additionally, the procedure includes the following step: after the suction mode: setting the pressure of the container volume above the pressure of the bag volume so that the bag filled with particles is vented.

[0017] Exemplary details and embodiments are explained below with reference to the figures. Fig. 1 A schematic side view of an arrangement consisting of a cyclone assembly and a suction device, Fig. 2 Another schematic side view of the arrangement, with the cyclone pre-separator raised relative to the container, Fig. 3 A detailed view of a possible design of a switching device Fig. 4 A detailed view of a possible design of a check valve Fig. 5 A perspective view of a cyclone arrangement, with the container inserted into a container holder.

[0018] The following description refers to the directions shown in the figures – an x-direction, a y-direction, and a z-direction. The x-direction, y-direction, and z-direction are orthogonal to each other. The z-direction can also be described as the vertical direction, and the x-direction and y-direction can also be described as the horizontal directions.

[0019] The Fig. Figure 1 shows a cyclone arrangement 10 in a typical application context, in which the cyclone arrangement 10 is operated as a separation pre-stage of a suction device 21. The combination of the cyclone arrangement 10 and the suction device 21 shall also be referred to below as "arrangement 20".

[0020] The cyclone assembly 10 comprises a cyclone pre-separator 1 for separating particles from an air stream. The cyclone pre-separator 1 has a particle outlet 2 on its underside for discharging the separated particles. The cyclone assembly 10 further comprises a bag 3 with a bag volume 4 for collecting the particles discharged from the particle outlet 2. The cyclone assembly 10 also includes a container 5, which provides a container volume 6 for receiving the bag 3. The cyclone pre-separator 1 is mounted on the container 5.

[0021] The cyclone pre-separator 1 also includes a pressure adjustment device 7, which allows the pressure in the container volume 6 to be adjusted relative to the pressure in the bag volume 4. Specifically, the pressure adjustment device 7 can be used to lower the pressure in the container volume 6 below the pressure in the bag volume 4, allowing the bag 3 to expand within the container volume 6. Alternatively or additionally, the pressure adjustment device 7 can be used to raise the pressure in the container volume 6 above the pressure in the bag volume 4, thus venting the bag 3.

[0022] Further exemplary details are explained below. First, let's look at the basic structure:

[0023] The suction device 21 is specifically designed to provide a negative pressure to the cyclone pre-separator 1, by means of which an airflow containing particles can be drawn into the cyclone pre-separator 1. The suction device 21 is fluidically connected to the cyclone pre-separator via a fluidic line 24, for example a hose, to provide the negative pressure. The fluidic line 24 is specifically connected to an air outlet 25 of the cyclone pre-separator 1.

[0024] The cyclone pre-separator 1 also has an air inlet 26 to which, for example, a suction hose 27 with a suction head 28 is connected. If a negative pressure is applied at the air outlet 26, for example by means of the suction device 21, an airflow containing particles is drawn through the suction head 28 and the suction hose 27 into the cyclone pre-separator 1. There, the airflow with the particles passes through a feed line 12 arranged in the cyclone pre-separator 1, which leads from the air inlet 26 to a cyclone chamber 9 arranged in the cyclone pre-separator. The cyclone chamber 9 is designed according to the known operating principle of a cyclone separator or a centrifugal separator in order to separate a portion of the particles from the airflow.In particular, the cyclone chamber 9 is designed such that the airflow is directed onto a circular path, whereby some of the particles contained in the airflow are flung against the walls of the cyclone chamber 9 by centrifugal force, so that they are slowed down and finally discharged downwards from the particle outlet 2.

[0025] The particles discharged from particle outlet 2 are collected in bag 3. By way of example, bag 3 is sealed, in particular airtight, against the container volume 6 by means of a first seal 16 located between bag 3 and cyclone pre-separator 1. The container volume 6 is expediently sealed, in particular airtight, against the environment of the cyclone pre-separator 1, in particular against the atmosphere, by means of a second seal 17 located between container 5 and cyclone pre-separator 1.

[0026] From the cyclone chamber 9, the airflow is further conveyed via a discharge line 11 located in the cyclone pre-separator 1 to the air outlet 25. By way of example, the airflow is then conveyed through the fluidic line 24 into the suction device 21 and there passes through a separation device 22, for example a filter, where particles remaining in the airflow are separated. The separated particles are collected in a particle collection volume of the suction device 21, for example in a suction bag 29. The airflow then passes through a suction unit 31 located in the suction device, for example a blower, which generates the negative pressure.

[0027] Accordingly, the cyclone pre-separator 1 is fluidically connected upstream of the suction device 21, so that the airflow drawn in by the suction device 21 has passed through the cyclone pre-separator 1 when the airflow reaches the suction device 21.

[0028] Next, we will discuss the pressure setting device 7.

[0029] As mentioned above, the pressure adjusting device 7 serves to adjust the pressure in the container volume 6 relative to the pressure in the bag volume 4. The pressure adjusting device 7 serves one or both of the purposes mentioned above: namely, firstly, the expansion of the bag (by reducing the pressure in the container volume below the pressure in the bag volume) and secondly, the venting of the bag (by increasing the pressure in the container volume above the pressure in the bag volume).

[0030] The pressure setting device 7 can be configured according to various exemplary embodiments, which will be explained below. The exemplary embodiments can serve one or both of the aforementioned purposes of the pressure setting device 7. The various embodiments can advantageously be combined.

[0031] The following statements apply in particular to the condition in which the cyclone arrangement 10 is in operation; i.e., that a negative pressure (or, where indicated, a positive pressure) is provided to the cyclone arrangement 10, in particular at the air outlet 25, for example by the suction device 21.

[0032] According to a first exemplary embodiment, the pressure adjusting device 7 comprises a fluid line 8 arranged in the cyclone pre-separator 1, with which the container volume 6 can be fluidically connected to or is connected to a vacuum zone of the cyclone pre-separator 1. The fluid line 8 opens at the bottom of the cyclone pre-separator 1. Advantageously, the discharge line 11 serves as the vacuum zone, and the container volume 6 can be fluidically connected to or is connected to the discharge line 11 via the fluid line 8.

[0033] Preferably, the cyclone pre-separator is designed such that, during operation, the air flows faster in the discharge line 11 than in the cyclone chamber 9 (which is in fluidic communication with the bag). Advantageously, the discharge line 11 has a smaller effective cross-section for the airflow than the cyclone chamber 9. Particularly due to the Venturi effect, a pressure difference thus arises between the fluid line 8 and the bag volume 4 (or the cyclone chamber 9), so that the container volume 6, which is connected to the fluid line 8, is vented, which in turn causes the bag 3 to expand within the container volume 6.

[0034] The fluid line 8 expediently has a smaller effective cross-section than the discharge line 11. The fluid line 8 is expediently a hose. The fluid line 8 runs, by way of example, from the underside of the cyclone pre-separator 1 to the discharge line 11, in particular directly. An opening is expediently provided on the underside of the cyclone pre-separator 1 through which the fluid line 8 is fluidically connected to the container volume 6.

[0035] Optionally, a first valve 15 can be provided in or on the fluidic line 8, with which the fluidic line 8 can be opened or closed. The first valve 15 expediently comprises a first check valve, which preferably allows an airflow from the container volume 6 to the negative pressure area of ​​the cyclone pre-separator 1, in particular the discharge line 11, and blocks an airflow in the opposite direction. Additionally or alternatively, the first valve 15 can also be manually actuated, so that by manual actuation it selectively opens or closes the fluidic connection to the container volume 6.

[0036] The first valve 15 serves in particular to close the fluidic connection to the container volume when the cyclone arrangement is operated without a bag; i.e., when the particles are collected directly in the container 5.

[0037] According to a second exemplary embodiment, the pressure adjusting device 7 comprises the first seal 16 and the second seal 17. The second seal 17 can advantageously be opened independently of the first seal 16, and in this way the pressure in the container volume 6 can preferably be set above the pressure in the bag volume 5 in order to vent the bag 3 (particularly in a state in which the bag is filled with particles).

[0038] The opening of the second seal 17 is expediently carried out by user operation, for example by releasing a coupling, such as the lower housing coupling means explained below, and / or by raising the cyclone pre-separator 1 relative to the container 5.

[0039] Lifting the container 5 from the cyclone pre-separator 1 is exemplified in the Fig. Figure 2 shows that opening the second seal 17 opens the container volume 6 to the environment of the cyclone pre-separator 1, in particular the atmosphere, and brings it to ambient pressure, specifically atmospheric pressure. The first seal 16 remains closed, so that the bag volume 4 remains sealed off from the container volume 6. The bag volume 4 is connected to the cyclone chamber, which is under negative pressure, via the particle outlet 2. The pressure in the bag volume 4 is therefore lower than the pressure in the container volume 6, so that the bag volume 4 is vented or evacuated.

[0040] According to a third exemplary embodiment, the pressure control device 7 comprises a switching device 8, in particular a flap 14. The switching device 8 can establish the fluidic connection between the fluid line 8 and the discharge line 11. Furthermore, the switching device 8 can block the fluidic connection between the fluid line 8 and the discharge line 11. Additionally or alternatively, the switching device 8 can block or throttle the fluidic connection between the cyclone chamber 9 and the discharge line 11. Furthermore, the switching device 8 can release the fluidic connection between the cyclone chamber 9 and the discharge line 11.

[0041] Advantageously, the switching device can assume a container venting state in which the fluidic connection between the cyclone chamber 9 and the discharge line 11 is blocked or throttled, and the fluidic connection between the fluid line 8 and the discharge line 11 is opened. The switching device can also assume a suction state in which the fluidic connection between the cyclone chamber 9 and the discharge line 11 is opened, and the fluidic connection between the fluid line 8 and the discharge line 11 is blocked. The switching device can, by way of example, be designed as a 3 / 2-way valve.

[0042] The Fig. Figure 3 shows an exemplary embodiment of the third design, in which the switching device comprises a flap 14. For the sake of clarity, the following are shown in the Fig. Figure 3 shows only the discharge line 11, the fluid line 8, and the flap 14, while the remaining components of the cyclone pre-separator 1 are not shown. The fluid line 8 is preferably directly connected fluidically to the container volume 6. As shown in the Fig. As can be seen in section 3, flap 14 can optionally be moved to a first position (in the Fig. 3 shown on the left) and into a second position (in the Fig. (3 shown on the right) can be displaced. The flap 14 is pivotally mounted and can be selectively moved into either the first or the second position by pivoting. In the first position, the flap 14 blocks the fluidic connection to the cyclone chamber 9 and opens the fluidic connection to the fluid line 8. In the second position, the flap 14 blocks the fluidic connection to the fluid line 8 and opens the fluidic connection to the cyclone chamber 9. Advantageously, the flap 14 assumes the first position in the container venting state and the second position in the suction state.

[0043] Advantageously, the switching device is designed to automatically assume the container venting state and / or the suction state. Preferably, the switching device is designed to automatically assume the container venting state after an empty bag 3 has been connected to the particle outlet 2 and / or to assume the suction state after the container volume 6 has been vented to a certain degree and / or the pressure in the container volume 6 has fallen below a certain threshold. Advantageously, the switching device has a spring element (not shown in the figures) that forces the flap 14 into a specific position, in particular the first or the second position. The spring force is preferably adjusted such that the automatic assumption of the various states described above takes place. Advantageously, the switching device is designed or...The spring force is adjusted such that when the pressure in the cyclone chamber 9 or in the bag volume 4 is less than and / or equal to the pressure in the fluid line 8 or the container volume 6 and the discharge line 11 (at the air outlet 5) is subjected to a negative pressure, the container venting state is assumed, and otherwise the suction state is assumed.

[0044] According to a fourth embodiment, the pressure adjusting device 7 comprises a second check valve 19 arranged in the discharge line 11. The second check valve 19 is designed such that, in a state where an airflow towards the cyclone chamber 9 is present in the discharge line 11, it blocks the fluidic connection to the cyclone chamber 9, so that the airflow is directed into the container volume 6 via the fluid line 8. Such a state occurs, for example, when the discharge line 11 is pressurized, for instance, by operating the suction device 21 in a mode in which it provides overpressure at the air outlet 5. By directing the airflow into the container volume 6 in this case, the pressure in the container volume 6 can be increased above the pressure in the bag volume 4, so that the bag 3 (especially when filled with particles) is vented and thereby made more compact.

[0045] The check valve 19 is advantageously arranged in the discharge line 11 in a section between the cyclone chamber 9 and the fluid line 8. Preferably, the check valve 19 is configured to assume an open position when there is an airflow from the cyclone chamber 9 to the air outlet 5 or when a negative pressure is applied to the air inlet 5, in which case the fluidic connection to the cyclone chamber 9 and, in particular, also the fluidic connection to the fluid line 8 is released. Furthermore, the check valve is configured to assume a closed position when there is an airflow from the air outlet 5 to the cyclone chamber 9 or when there is an overpressure applied to the air outlet 5, in which case the fluidic connection to the cyclone chamber 9 is closed and the fluidic connection to the fluid line 8, and in particular to the container volume 6, is released.

[0046] In the Fig. Figure 4 shows an exemplary embodiment of the second check valve 19 as a pivotable flap. On the left, the check valve 19 is in the open position, in which the discharge line 11 is not blocked. An airflow towards the cyclone chamber 9 actuates the flap, in particular pivoting it, and it assumes the closed position shown on the right, in which the discharge line 11 is blocked, particularly behind the fluid line 8. Advantageously, a spring element is provided that forces the flap into the open or closed position.

[0047] In a preferred embodiment, the pressure adjusting device 7 according to the first embodiment is combined with the second embodiment - thus comprising the fluid line 8 as well as the two separate seals 16, 17.

[0048] The following section will discuss exemplary configurations of the components of Arrangement 20. Particular attention will be paid to the... Fig. Reference is made to Figure 5, which shows a possible external design of the cyclone pre-separator 1, the container 3 and the container receptacle 23. First, let's look at the cyclone pre-separator 1:

[0049] The cyclone pre-separator 1 comprises a box-shaped housing 33. The term "box-shaped" refers in particular to an essentially cuboid shape.

[0050] The housing 33 comprises, by way of example, a base from which four orthogonally oriented circumferential walls extend upwards. Advantageously, the base and the circumferential walls together form a lower part of the housing 33, to which a cover 35 is hinged. The upper side of the lower part is preferably open and can advantageously be completely closed by the cover 35. With the cover 35 open, a cyclone unit comprising the cyclone chamber 9, the discharge line 11, and the feed line 12 is accessible.

[0051] The lid 35 is provided with a carrying handle 18, which can be used to lift the cyclone pre-separator 1. In the example shown, the carrying handle 18 is arranged on the top of the lid 35, and in particular is hinged to it. It is preferably a carrying handle 18 with a U-shaped form.

[0052] The cyclone chamber 9 is exemplified as being provided in a cylindrical body. The discharge line 11 is preferably formed by a pipe element and extends from the top of the cyclone chamber 9 to the air outlet 25, which is expediently arranged on a circumferential wall, in particular an end-face circumferential wall. The supply line 12 is preferably also formed by a pipe element and extends from one side of the cyclone chamber 9, in particular the outer surface of the cylindrical body, to the air inlet 26, which is preferably arranged on a circumferential wall, in particular the same circumferential wall as the air outlet 25. For the sake of clarity, the air outlet 25 and the air inlet 26 are shown in the Fig. 1 and Fig. 2 shown arranged one above the other; however, they can also be shown as in the Fig. 5 shown, arranged horizontally next to each other.

[0053] The cylindrical body providing the cyclone chamber 9, the discharge line 11 and the feed line 12 are preferably arranged completely in the box-shaped housing 33.

[0054] Preferably, the fluid line 8 is also arranged in the box-shaped housing 33, in particular completely. The fluid line 8 runs from the bottom of the housing upwards to the discharge line 11 and is fluidically connected to it.

[0055] The fluid line 8 exits at the bottom of the housing 33 - for example via the first valve 15, but alternatively also directly, i.e. without a valve.

[0056] The fluid line 8 opens within a surface area of ​​the underside of the housing 33 that is enclosed by the second seal 17. Advantageously, the second seal 17 surrounds the underside of the housing 33 at its edge. The second seal 17 is provided, for example, by an elastic material that is advantageously arranged, in particular injection-molded, on the underside of the housing 33 and / or the top of the container 5. The second seal 17 advantageously surrounds a large proportion of the surface of the underside of the housing 33, in particular at least 80%.

[0057] The particle outlet 2 is also arranged in the area enclosed by the second seal 17. The particle outlet 2 is preferably located in a central area on the underside of the housing 33 and is, in particular, spaced apart from the second seal 17. By way of example, the particle outlet 2 extends downwards from the underside of the housing 33 and projects into the container volume 6. The particle outlet 2 includes an opening through which the bag 3 (or the container 5, if no bag 3 is used) is connected to the cyclone chamber 9. Advantageously, the particle outlet 2 also includes the first seal 16, which preferably surrounds the opening of the particle outlet 2. The first seal 16 is advantageously arranged in a central area on the underside of the housing 33 and is preferably spaced apart from the second seal 17.The first seal 16 is provided, for example, by an elastic material which is expediently arranged, in particular injection-molded, at the particle outlet 2 and / or at an access element of the bag 3 as described below. The first seal 16 is expediently located between the particle outlet 2 and the access element.

[0058] The housing 33, in particular its upper surface, is preferably designed such that another box-shaped or cuboid body, in particular a system box, can be stacked on top of it. For example, the upper surface and circumferential walls of the housing 33 are aligned orthogonally to each other.

[0059] Due to its box-like design, another box-shaped body, such as a system box, can be stacked on top of the cyclone pre-separator 1 and conveniently coupled vertically with tensile strength. System boxes within a system have a defined base area and coupling means, or are compatible with a specific coupling system, so that system boxes within a system can be assembled into a stable stack. System boxes are widely used, for example, as modular toolboxes for storing handheld power tools, accessories, and / or consumables.

[0060] The housing 33 has, by way of example, upper housing coupling means 36 with which the housing 33 can be coupled to the underside of a system box. The upper housing coupling means 36 comprise, in particular, a movable locking element 37 and / or non-movable locking elements, for example, engagement recesses arranged on the top. The upper housing coupling means 36 are designed to provide a releasable, vertically tensile-resistant coupling with the box-shaped body, for example, a system box, when it is stacked on the housing 33.

[0061] The movable locking element 37 is exemplified as a rotary latch. Advantageously, the locking element 37 is arranged on a longitudinal circumferential side, in particular on the cover 35. The rotary latch is exemplified as serving both to lock the cover 35 and to provide coupling with a box-shaped body arranged on the cyclone pre-separator 1. The rotary latch has, in particular, a T-shaped form.

[0062] The housing 33 has lower housing coupling means 34, which are designed to provide a releasable, vertically tensile-resistant coupling with the container 5 when the cyclone pre-separator 1 is mounted on the container 5. The lower housing coupling means 34 include, by way of example, two movably mounted locking elements that can be engaged by user operation with container coupling means 38 arranged on the container 5. The coupling between the lower housing coupling means 34 and the container coupling means 38 advantageously presses the container 5, with its upper side, in particular the upper edge of its circumferential walls, against the underside of the cyclone pre-separator 1, thereby advantageously creating the first seal 16, which is particularly airtight, or reinforcing its sealing effect. The following section will discuss bag 2:

[0063] Bag 2 comprises, by way of example, a bag body 39 made of a flexible material, which is in particular airtight. Bag 2 also comprises, by way of example, an access element 41, in particular in the form of a plate, with an access opening through which the bag volume 4 is accessible. Advantageously, the first seal 16 is provided between the access element 41 and the particle outlet 2. The seal 16 can be attached to the access element and / or to the particle outlet 2.

[0064] The bag 2 is arranged, in particular via the access element 41, on the underside of the cyclone pre-separator 1, specifically at the particle outlet 2. The bag volume 4 is in fluidic communication with the cyclone chamber 9 via the particle outlet 2 and is sealed, in particular airtight, against the container volume 6 by means of the first seal 16. The bag 2 is located, in particular, below the cyclone chamber 9, so that particles separated in the cyclone chamber 9 fall into the bag 2 through the particle outlet 2, in particular due to gravity.

[0065] By way of example, the prey 2 further comprises a lid 42, which is slidably mounted on the access element 41. In a state in which the bag 3 is attached to the particle outlet 2, in particular by means of the access element 41, the lid is, as in the Fig. 1 and Fig.The access element 41, which can be seen in the particle outlet 2, is advantageously also attached to the particle outlet 2. The access element 41 can then preferably be moved directly from an open position, in which it establishes the fluidic connection between the opening of the particle outlet 2 and the bag volume 4, to a closed position, in which the access element 41 – and thus also the bag volume 4 – is closed by the lid 42. For this purpose, the access element 41 can be moved horizontally, particularly when attached to the particle outlet 2, so that it is located under the lid 42. Advantageously, a seal, in particular an airtight seal, is arranged between the lid 42 and the access element 41, so that the bag volume 4 is completely, and in particular airtightly, sealed in the closed position of the access element 41.The bag 2 - i.e. the bag body 39, the access element 41 and the lid 42 - can then conveniently be removed from the particle outlet 2, for example for transport and / or disposal. The following section will discuss container 5:

[0066] The container 5 is designed as a stand for the cyclone pre-separator 1, can be placed stably on a flat surface, and has an open top onto which the cyclone pre-separator 1 can be placed. The container 5 comprises a rectangular base and four outer walls that extend upwards from the base and define a horizontal outer contour of the container 5. The horizontal outer contour defined by the outer walls tapers towards the base, and the container 5 can be stacked inside another identical container 5. A second seal 17 is advantageously provided between the upper edge of the outer walls of the container 5 and the underside of the housing 33.

[0067] The container 5 is equipped, by way of example, with container coupling means 38, which engage with the lower housing coupling means 34 of the cyclone pre-separator 1 to provide a detachable, vertically tensile-resistant coupling between the container 5 and the cyclone pre-separator 1. The container coupling means 38 are advantageously arranged on the longitudinal outer walls of the container, particularly in recesses. Advantageously, the container coupling means are located in the upper region of the container 5. The container coupling means 38 are, in particular, non-movable container coupling means, which are, by way of example, designed in a web-like form.

[0068] The container 5 can be inserted into a container receptacle 23. The container receptacle 23 is preferably open at the top. The horizontal inner contour of the container receptacle 23 advantageously tapers downwards, so that the shape of the container receptacle 23 is adapted to the shape of the container 5 and the container 5 is stabilized, particularly horizontally, by the container receptacle 23. The container receptacle 23 is located on the top of the suction device 21 and is preferably permanently accessible from the outside.

[0069] The following section will address Order 20.

[0070] The arrangement 20 is designed as a stacked arrangement comprising the suction device 21 and the cyclone arrangement 10 mounted on the suction device 21, wherein the container 5 is inserted into the container receptacle 23 located on the top of the suction device 21. The cyclone pre-separator 1 is mounted on the container 5 and connected to the container 5 vertically and tensilely by means of lower housing coupling means 34.

[0071] The cyclone pre-separator 1 rests on the container 5 with its underside. Advantageously, the horizontal outer contour of the top of the container 5 lies within the horizontal outer contour of the underside of the cyclone pre-separator 1; that is, the cyclone pre-separator 1 projects beyond the container's outer walls in all horizontal directions. The vertical extent of the container 5 is greater than the vertical extent of the cyclone pre-separator 1. Preferably, the container 5 is twice as high or more than twice as high as the cyclone pre-separator 1.

[0072] The suction unit 41 has a suction port 43 and is designed to provide negative pressure at this suction port 43. The fluidic line 24 is connected to the suction port 43. The suction unit 41 is designed as a mobile vacuum cleaner and has casters 44, allowing it to be moved.

[0073] The following describes a procedure by which an order, in particular the order 20 described above, can be operated. The procedure comprises the following step: Operating the arrangement 20 in a suction mode in which the suction device 21 provides a negative pressure to the cyclone pre-separator 1, so that an airflow containing particles is drawn into the cyclone pre-separator 1 and at least a proportion of the particles are separated in the cyclone pre-separator 1 and collected in the bag 3,

[0074] The procedure also includes the following step: Before or during suction mode: Set the pressure in the container volume 6 below the pressure in the bag volume 4 using the pressure adjustment device 7, so that the bag 3 expands in the container volume 6.

[0075] Alternatively or additionally, the procedure includes the following step: After the suction mode: Setting the pressure of the container volume 6 above the pressure of the bag volume 4 so that the bag 3 filled with particles is vented.

[0076] According to a preferred embodiment, the fluid connection 8 is used during particle suction to ensure that the pressure in the container volume 6 is lower than the pressure in the bag volume 4, so that the bag 3, in particular the bag body 39, expands and is as large as possible. The arrangement 20 is advantageously simultaneously in a suction mode and a container venting mode.

[0077] By disconnecting the coupling between the cyclone pre-separator 1 and the container 5 and / or removing the cyclone pre-separator 1, thereby opening the second seal 17, the pressure in the container volume 6 is reduced below the pressure in the bag volume 4, so that the bag 3 is vented. The arrangement is expediently in a bag venting mode.

[0078] The arrangement 20 is therefore initially operated in the container venting mode and a suction mode, and then switched to the bag venting mode. Advantageously, the container venting mode can also take place before the suction mode.

Claims

[1] Cyclone arrangement (10), comprising: a cyclone pre-separator (1) for separating particles from an air stream, wherein the cyclone pre-separator (1) has a particle outlet (2) on its underside for discharging the separated particles, a bag (3) with a bag volume (4) for receiving the particles discharged from the particle outlet (2), a container (5) which provides a container volume (6) for receiving the bag (3) and on which the cyclone pre-separator (1) is mounted, wherein the cyclone pre-separator (1) comprises a pressure adjustment device (7) with which: the pressure in the container volume (6) can be reduced below the pressure in the bag volume (4) so ​​that the bag (3) expands in the container volume (6), and / or the pressure in the container volume (6) can be set above the pressure in the bag volume (4) so ​​that the bag (3) is vented, wherein the pressure adjusting device (7) comprises a fluid line (8) arranged in the cyclone pre-separator (1) and opening at the bottom of the cyclone pre-separator (1), with which the container volume (6) can be fluidically connected or is connected to a negative pressure area of ​​the cyclone pre-separator (1). [2] Cyclone arrangement (10) according to claim 1, wherein the cyclone pre-separator (1) comprises a cyclone chamber (9) in which the separation of the particles takes place, and a discharge line (11) connected to the cyclone chamber (9), and wherein the container volume (6) can be fluidically connected to or is connected to the discharge line (11) via the fluid line (8). [3] Cyclone arrangement (10) according to claim 2, wherein the pressure control device (7) has a switching device, in particular a flap (14), with which the fluidic connection between the fluid line (8) and the discharge line (11) can be established and / or the fluidic connection between the cyclone chamber (9) and the discharge line (11) can be blocked or throttled. [4] Cyclone arrangement (10) according to one of the preceding claims, wherein a first valve (15) is arranged in the fluid line (8) with which the fluid line (8) can be blocked. [5] Cyclone arrangement (10) according to one of the preceding claims, further comprising a first seal (16) between the bag (3) and the cyclone pre-separator (1), wherein the first seal (16) seals the bag volume (4) against the container volume (6), and a second seal (17) between the container (5) and the cyclone pre-separator (1), wherein the second seal (17) seals the container volume (6) against an environment, in particular the atmosphere. [6] Cyclone arrangement (10) according to claim 5, wherein the second seal (17) can be released, in particular by user actuation, independently of the first seal (16) in order to set the pressure in the container volume (6) above the pressure in the bag volume (4). [7] Cyclone arrangement (10) according to claim 6, wherein the second seal (17) can be opened by releasing a coupling between the cyclone pre-separator (1) and the container (5) and / or raising the cyclone pre-separator (1) relative to the container (5), while the first seal (16) remains closed. [8] Cyclone arrangement (10) according to one of the preceding claims, wherein the cyclone pre-separator (1) has a carrying handle (18) arranged on its upper side with which the cyclone pre-separator (1) can be lifted. [9] Cyclone arrangement (10) according to one of the preceding claims, wherein a second check valve (19) is arranged in the discharge line (11), which, in a state in which an airflow in the direction towards the cyclone chamber (9) is present in the discharge line (11), blocks the fluidic connection to the cyclone chamber (9), so that the airflow is directed via the fluid line (8) into the container volume (6). [10] Arrangement (20) comprising a cyclone arrangement (10) according to one of the preceding claims and a suction device (21) fluidically connected to the cyclone pre-separator (1) for providing a negative pressure at the cyclone pre-separator (1) . [11] Arrangement (20) according to claim 10, wherein the cyclone pre-separator (1) is fluidically connected upstream of the suction device (21), so that an airflow drawn in by the suction device (21) has passed through the cyclone pre-separator (1) when the airflow reaches the suction device (21), and wherein the suction device (21) has a separation device (22) configured to separate particles remaining in the airflow. [12] Arrangement (20) according to claim 10 or 11, wherein the arrangement (20) is designed as a stack arrangement comprising the suction device (21), in particular designed as a mobile vacuum cleaner, and the cyclone arrangement (10) mounted on the suction device (21), wherein the container (5) is inserted into a container receptacle (23) arranged on the top of the suction device (21). [13] Method for operating an arrangement (20) according to any one of claims 10 to 12, comprising the step: Operating the arrangement (20) in a suction mode in which the suction device (21) provides a negative pressure to the cyclone pre-separator (1) so that an airflow containing particles is drawn into the cyclone pre-separator (1) and at least a proportion of the particles are separated in the cyclone pre-separator (1) and collected in the bag (3), the procedure further includes the step: Before or during the suction mode: Set the pressure in the container volume (6) below the pressure in the bag volume (4) using the pressure adjustment device (7) so that the bag (3) expands in the container volume (6). and / or After the suction mode: Setting the pressure of the container volume (6) above the pressure of the bag volume (4) so ​​that the bag (3) filled with particles is vented.

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