Suction cleaning device

Abstract

The invention relates to a vacuum cleaning device (10) with a device body (12) comprising a suction container (24) with a receiving chamber (38) for suction material and a suction head (26) arranged on the suction container (24) with a suction unit (40) which is in flow communication with the receiving chamber (38) via at least one filter device (42), wherein the device body (12) has a first longitudinal side (28) and a second longitudinal side (30) which are connected to each other via a first transverse side (32) and a transverse side (34), wherein a suction inlet (36) is arranged on the first transverse side (32) which is in flow communication with the receiving chamber (38), and wherein the suction unit (40) is in flow communication with an air outlet (54) arranged on the second transverse side (34) via an air outlet channel (52).In order to further develop the vacuum cleaning device (10) in such a way that it has a lower noise emission, it is proposed that the air outlet duct (52) has a first and a second duct section (56, 58), wherein the first duct section (56) extends towards one of the two transverse sides (32, 34) and the second duct section (58) extends towards the other of the two transverse sides (32, 34), wherein sound absorbers (72, 78) are arranged in the duct sections (56, 58).

Description

[0001] The invention relates to a vacuum cleaning device with a device body comprising a container for the material being vacuumed, with a receiving chamber for the material being vacuumed, and a suction head arranged on the container with a suction unit which is in flow communication with the receiving chamber via at least one filter device to generate a suction flow, wherein the device body has a first longitudinal side and a second longitudinal side which are connected to each other via a first transverse side and a second transverse side, wherein a suction inlet is arranged on the first transverse side which is in flow communication with the receiving chamber, and wherein the suction unit is in flow communication with an air outlet arranged on the second transverse side via an air outlet channel.

[0002] Such vacuum cleaning devices are known, for example, from WO 2006 / 108460 A1 and DE 10 2020 132 594 A1. They comprise a device body that includes a container with a receiving chamber for the material being vacuumed and a suction head with a suction unit arranged on the container. The suction unit is in flow communication with the receiving chamber via at least one filter device to generate a suction flow. The device body has a first longitudinal side and a second longitudinal side, which are connected to each other via a first transverse side and a second transverse side. A suction inlet is arranged on the first transverse side, which is in flow communication with the receiving chamber, and at least one air outlet is arranged on the second transverse side. The suction unit is in flow communication with the air outlet via an air outlet duct.The suction unit creates a suction flow in the receiving chamber, drawing in suction air laden with debris. This debris is separated from the suction air and collected in the receiving chamber by at least one filter device located in the airflow path between the receiving chamber and the suction unit. The suction air then escapes from the suction unit via an air outlet duct and an air outlet on the unit body. The operation of the vacuum cleaning unit is associated with noise emissions.

[0003] The object of the present invention is to further develop a vacuum cleaning device of the type mentioned above in such a way that it has a lower noise emission.

[0004] This problem is solved in a vacuum cleaning device of the generic type according to the invention by the fact that the air outlet channel has a first and a second channel section, wherein the first channel section extends from an outlet area of ​​the vacuum unit in the direction of one of the two transverse sides and the second channel section extends downstream of the first channel section in the direction of the other of the two transverse sides, and wherein a sound absorber is arranged in each of the two channel sections.

[0005] In the suction cleaning device according to the invention, the air outlet channel, through which the suction air drawn in by the suction unit can be discharged, has a first channel section extending from an outlet area of ​​the suction unit towards one of the two transverse sides of the housing body, and a second channel section arranged downstream of the first channel section and extending towards the other of the two transverse sides of the device body. For example, the first channel section can extend from the outlet area of ​​the suction unit towards the first transverse side, and the second channel section can extend towards the second transverse side. With respect to the direction of airflow, the two channel sections thus extend in opposite directions.This allows the outlet channel to be equipped with a considerable length overall, whereby a considerable reduction in noise emission can be achieved under the effect of the sound absorbers arranged in the first channel section and in the second channel section, and the vacuum cleaning device can have a compact design.

[0006] It is advantageous if the length of the first channel section corresponds to at least 50% of the length of the vacuum cleaning device. The length of the vacuum cleaning device is understood here to be the distance between its two transverse sides.

[0007] It is particularly advantageous if the length of the first channel section corresponds to at least 60% of the length of the vacuum cleaning device, for example at least 66% of the length of the vacuum cleaning device.

[0008] The length of the second channel section preferably corresponds to at least 50% of the length of the vacuum cleaning device, in particular at least 60% of the length of the vacuum cleaning device, for example 66% of the length of the vacuum cleaning device.

[0009] In an advantageous embodiment of the invention, the width of the first channel section corresponds to at least 50% of the width of the vacuum cleaning device. The width of the vacuum cleaning device is understood here to be the distance between the two longitudinal sides of the vacuum cleaning device. The first channel section thus has a considerable width. This allows flow losses within the first channel section to be kept to a minimum and enables strong sound absorption.

[0010] In particular, it may be provided that the width of the first channel section corresponds to at least 70% of the width of the vacuum cleaning device, for example at least 80% of the width of the vacuum cleaning device.

[0011] The width of the second channel section preferably corresponds to at least 50% of the width of the vacuum cleaning device. This minimizes flow losses within the second channel section and allows for strong sound absorption.

[0012] In particular, it may be provided that the width of the second channel section corresponds to at least 70% of the width of the vacuum cleaning device, for example at least 80% of the width of the vacuum cleaning device.

[0013] In a preferred embodiment of the invention, the height of the first channel section is a maximum of 25% of its width. It has been shown that, despite the relatively small height of the first channel section compared to its width, flow losses can be kept low, while at the same time, very effective noise reduction can be achieved by means of the sound absorber arranged in the first channel section.

[0014] The height of the first channel section is preferably a maximum of 15% of the width of the first channel section.

[0015] The height of the second channel section is preferably a maximum of 25% of its width, and in particular a maximum of 15%. Such a design of the second channel section also enables very effective noise reduction, while keeping flow losses to a minimum.

[0016] It is particularly advantageous if the sound absorber in the first duct section is designed as a first sound-absorbing mat extending over at least 70% of the length and at least 80% of the width of the first duct section, with a thickness of 20% to 60% of the height of the first duct section, and if the sound absorber in the second duct section is designed as a second sound-absorbing mat extending over at least 70% of the length and at least 80% of the width of the second duct section, with a thickness of 20% to 60% of the height of the second duct section. Such a design of the sound absorbers in the two duct sections allows for a further improvement in noise reduction. In particular, airflow noise can be kept very low as a result.

[0017] The first sound absorber mat and the second sound absorber mat can, for example, be made of melamine resin foam.

[0018] In a particularly compact embodiment of the suction cleaning device according to the invention, the second channel section is arranged directly above the first channel section. This allows the design of the suction cleaning device to be kept particularly small.

[0019] In particular, it may be provided that a partition wall is arranged between the first channel section and the second channel section, defining a ceiling wall of the first channel section and a floor wall of the second channel section.

[0020] The sound absorbers are preferably arranged on the partition wall.

[0021] To secure the sound absorbers, retaining elements can be arranged in the first and second duct sections. Retaining ribs extending longitudinally along the duct sections are preferably used as these retaining elements.

[0022] In an advantageous embodiment of the invention, a third channel section of the air outlet duct connects to the second channel section, the third channel section extending to the air outlet of the device body and containing an air outlet filter. The air outlet filter allows for a smoothing of the airflow directly upstream of the air outlet. This, in turn, helps to minimize the noise generated by the air flowing through the outlet. Furthermore, the at least one air outlet filter can retain dirt particles carried by the air. These could be, for example, coal dust particles generated by an electric drive motor of the vacuum unit.

[0023] In particular, it may be stipulated that at least one air outlet filter is designed as a HEPA filter (high-efficiency particulate air filter). HEPA filters are highly efficient air filters that filter out not only dust but also, for example, house dust mites and mold.

[0024] The air outlet is preferably designed in the form of several air outlet slots, which, during normal use of the vacuum cleaning device, are directed towards a surface on which the vacuum cleaning device rests. In this embodiment of the invention, the air exiting the device body through the air outlet slots is directed towards a surface on which the vacuum cleaning device stands during normal use, for example, a floor. This has the advantage, among others, that a user of the vacuum cleaning device is practically unaffected by the escaping air.

[0025] In an advantageous embodiment of the invention, a particularly compact design with simultaneously low noise emissions is achieved by arranging the outlet area of ​​the suction unit, preferably the entire suction unit, offset from a geometric center plane of the vacuum cleaning device, with the center plane being positioned midway between the first and second transverse sides. In such an embodiment, at least the outlet area of ​​the suction unit, preferably the entire suction unit, is arranged off-center within the device body. This allows the first duct section of the air outlet channel extending from the outlet area of ​​the suction unit to be designed with a length significantly greater than half the length of the vacuum cleaning device.

[0026] The outlet area of ​​the suction unit, preferably the entire suction unit, can, for example, be arranged offset towards the second transverse side relative to the central plane.

[0027] Alternatively or additionally to an arrangement of the outlet area of ​​the suction unit, in particular the complete suction unit, offset from the central plane, the suction unit can be inclined relative to the central plane towards the second transverse side. This allows for a particularly compact design of the suction cleaning device, whereby the first duct section of the air outlet duct can have a considerable length.

[0028] The following description of an advantageous embodiment of the invention, in conjunction with the drawing, serves for further explanation. The drawing shows: Figure 1: a longitudinal sectional view of a vacuum cleaning device; Figure 2: a sectional view of the vacuum cleaning device along line 2-2 in Figure 1Figure 3: a sectional view of the vacuum cleaning device along line 3-3 in Figure 1 .

[0029] In the drawing, an advantageous embodiment of a suction cleaning device according to the invention is schematically depicted and is labelled with reference numeral 10.

[0030] The vacuum cleaning device 10 has a device body 12 which extends along a path in the Figures 2 and 3 The device body 12 can be moved to the illustrated footprint 14. For this purpose, it has two running wheels 16, 18 and two rollers 20, 22.

[0031] The device body 12 comprises a suction container 24, on which the running wheels 16, 18 and the running rollers 20, 22 are rotatably mounted, as well as a suction head 26, which is arranged on the suction container 24.

[0032] The device body 12 has a first longitudinal side 28 and a second longitudinal side 30 opposite the first longitudinal side 28, which are connected to each other via a first transverse side 32 and a second transverse side 34 opposite the first transverse side 32. A suction inlet 36 is arranged on the first transverse side 32, which, in the exemplary embodiment shown, opens directly into a receiving chamber 38 of the suction container 24.

[0033] The suction head 26 has a suction unit 40 which is in flow communication with the receiving chamber 38, with a filter device 22 being located upstream of the suction unit 40. By means of the suction unit 40, the receiving chamber 38 can be supplied with a suction flow, so that suction air loaded with material to be suctioned can be drawn into the receiving chamber 38 via the suction inlet 36.

[0034] The suction unit 40 comprises an electric drive motor 44 and a suction blower 46, which can be rotated by the drive motor 44 about a blower axis 48 to generate the suction flow. The drive motor 44 is surrounded in its end region facing away from the receiving chamber 38 by an outlet region of the suction unit 40. An air outlet duct 52 connects to the outlet region 50, through which the suctioned air, after the material it carries has been separated by the filter device 42, can be supplied to an air outlet 54 located on the second transverse side 34, through which the suction air can be discharged from the device body 12 into an outside space.

[0035] The air outlet duct 52 has a first duct section 56, which connects to the outlet area 50 in the direction of suction air flow and extends towards the first transverse side 32. Downstream of the first duct section 56, the air outlet duct 52 has a second duct section 58, which extends towards the second transverse side 34 and to which a third duct section 60 connects in the direction of suction air flow, extending to the air outlet 54 and in which an air outlet filter 62 is arranged, which in the illustrated embodiment is designed as a HEPA filter 64 and which is located directly upstream of the air outlet 54.

[0036] The air outlet 54 is designed in the form of air outlet slots 66, which, when the vacuum cleaning device is used as intended, are directed towards the surface 14, so that the suction air exiting via the air outlet slots 66 is directed towards the surface 14.

[0037] The device body 12 has a central plane 68 oriented perpendicular to the base 14, which is located midway between the first transverse side 32 and the second transverse side 34. The suction unit 40 is offset from the central plane 48 in the direction of the second transverse side 34 and inclined relative to the central plane 48 in the direction of the second transverse side 30.

[0038] The first channel section 56 extends from the outlet area 50 of the suction unit 40, which is offset from the central plane 68, over more than half the length of the suction cleaning device 10 in the direction of the first transverse side 32. The length of the first channel section 56 is therefore more than 50% of the length of the suction cleaning device 10. The length of the suction cleaning device is understood here to be the distance between the first transverse side 32 and the second transverse side 34.

[0039] The second channel section 58 is arranged directly above the first channel section 58 and also extends over more than half the length of the suction cleaning device 10. A partition wall 70 is arranged between the first channel section 56 and the second channel section 58, forming a ceiling wall of the first channel section 56 and a floor wall of the second channel section 58.

[0040] Both the first channel section 56 and the second channel section 58 extend essentially across the entire width of the vacuum cleaning device 10. This is particularly evident from the Figures 2 and 3 clearly. The width of the vacuum cleaning device 10 is understood here to be the distance between the first longitudinal side 28 and the second longitudinal side 30.

[0041] In the illustrated embodiment, the height of the first channel section 56 is approximately 10% of the width of the first channel section, and the height of the second channel section 58 is approximately 10% of the width of the second channel section 58.

[0042] In the first channel section 56, a first sound absorber 72 in the form of a first sound absorber mat 74 is arranged, which is held by means of first retaining ribs 76 on the underside of the partition wall 70 facing the first channel section 56. Similarly, in the second channel section 58, a second sound absorber 78 in the form of a second sound absorber mat 80 is arranged, which is held by means of second retaining ribs 82 on the upper side of the partition wall 70 facing the second channel section 58.

[0043] The first sound-absorbing mat consists of melamine resin foam and extends over approximately 80% of the length and approximately 90% of the width of the first channel section 56. The thickness of the first sound-absorbing mat is approximately 40% of the height of the first channel section 56.

[0044] The second sound-absorbing mat also consists of melamine resin foam and extends over approximately 90% of the length and approximately 90% of the width of the second channel section 58. The thickness of the second sound-absorbing mat 80 is approximately 40% of the height of the second channel section 58.

[0045] The air outlet duct 52 thus has a total length that exceeds the length of the vacuum cleaning device 10, with the first duct section 56 and the second duct section 58 extending practically across the entire width of the vacuum cleaning device 10 and having a relatively low height. A very effective noise reduction is achieved through the action of the large-area and thick sound-absorbing mats 74, 80 and the considerable lengths of the two duct sections 56, 78. In particular, airflow noise can be kept very low. The air outlet filter 62, located immediately upstream of the air outlet 54, not only allows dirt particles, such as coal dust particles, carried by the air to be retained, but also ensures a more uniform airflow immediately upstream of the air outlet 54.This allows the air outlet noise generated when air flows through the air outlet 54 to be kept very low.

[0046] To supply energy to the electric drive motor 44, the vacuum cleaning device 10, in the exemplary embodiment shown, has a rechargeable battery 84 which is received by a battery holder 86. The battery holder 86 is designed in the form of a recess 88 in the suction head 26, which is open on a top surface 90 of the suction head 26, so that the battery 84 can be inserted into the battery holder 86 from above and removed from the battery holder 86 again if necessary.

[0047] As already mentioned, the intake chamber 38 can be supplied with suction by means of the suction unit 40. A suction hose can be connected to the suction inlet 36 in the usual manner, so that suction air laden with material to be removed can be drawn into the intake chamber 38 via the suction hose and the suction inlet 36. The material to be removed can be separated from the suction air by means of the filter unit 42, and the suction air can be discharged from the suction unit 40 into the outside via the air outlet duct 52 and the air outlet 54. Any resulting flow and air outlet noise can be kept to a minimum. The vacuum cleaning unit 10 therefore has very low noise emissions and is also characterized by a compact design, which makes the vacuum cleaning unit 10 easier for the user to handle.

Claims

1. A vacuum cleaning device with a device body (12) comprising a container (24) with a receiving chamber (38) for the material to be vacuumed and a suction head (26) arranged on the container (24) with a suction unit (40) which is in flow communication with the receiving chamber (38) via at least one filter device (42) to generate a suction flow, wherein the device body (12) has a first longitudinal side (28) and a second longitudinal side (30) which are connected to each other via a first transverse side (32) and a second transverse side (34), wherein a suction inlet (36) is arranged on the first transverse side (32) which is in flow communication with the receiving chamber (38), and wherein the suction unit (40) is in flow communication with an air outlet (54) arranged on the second transverse side (34) via an air outlet channel (42). characterized by the fact thatthe air outlet duct (52) has a first and a second duct section (56, 58), wherein the first duct section (56) extends from an outlet area (50) of the suction unit (40) towards one of the two transverse sides (32, 34) and the second duct section (58) extends downstream of the first duct section (56) towards the other of the two transverse sides (32, 34), and wherein a sound absorber (72, 78) is arranged in each of the two duct sections (56, 58).

2. Vacuum cleaning device according to claim 1, characterized by the fact that the length of the first channel section (56) corresponds to at least 50% of the length of the vacuum cleaning device (10), in particular at least 60% of the length of the vacuum cleaning device.

3. Vacuum cleaning device according to claim 1 or 2, characterized by the fact thatthe length of the second channel section (58) corresponds to at least 50% of the length of the vacuum cleaning device (10), in particular at least 60% of the length of the vacuum cleaning device (10).

4. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the width of the first channel section (56) corresponds to at least 50% of the width of the vacuum cleaning device (10), in particular at least 70% of the width of the vacuum cleaning device (10).

5. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the width of the second channel section (58) corresponds to at least 50% of the width of the vacuum cleaning device (10), in particular at least 70% of the width of the vacuum cleaning device (10).

6. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the height of the first channel section (56) is a maximum of 25% of the width of the first channel section (56), in particular a maximum of 15% of the width of the first channel section (56).

7. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the height of the second channel section (58) shall be a maximum of 25% of the width of the second channel section (58), in particular a maximum of 15% of the width of the second channel section (58).

8. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the sound absorber (72) arranged in the first channel section (56) is designed as a first sound absorber mat (74) which extends over at least 70% of the length and at least 80% of the width of the first channel section (56), and whose thickness is 20% to 60% of the height of the first channel section (56), and that the sound absorber (78) arranged in the second channel section (58) is designed as a second sound absorber mat (80) which extends over at least 70% of the length and at least 80% of the width of the second channel section (58), and whose thickness is 20% to 60% of the height of the second channel section (58).

9. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the second channel section (58) is located directly above the first channel section (56).

10. Vacuum cleaning device according to claim 9, characterized by the fact that a partition wall (70) is arranged between the first channel section (56) and the second channel section (58), which defines a ceiling wall of the first channel section (56) and a floor wall of the second channel section (58).

11. Vacuum cleaning device according to claim 10, characterized by the fact that the sound absorbers (72, 78) are arranged on the partition wall (70).

12. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that a third channel section (60) of the air outlet channel (52) is connected to the second channel section (58), the third channel section (60) extending to the air outlet (54) and an air outlet filter (62) being arranged in the third channel section (60).

13. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that The air outlet (54) is designed in the form of several air outlet slots (66) which, when the vacuum cleaning device (10) is used as intended, are directed towards a surface (14) of the vacuum cleaning device (10).

14. Vacuum cleaning device according to one of the preceding claims, characterized by the fact that the outlet area (50) of the suction unit (40) is arranged offset to a geometric median plane (68) of the suction cleaning device (10), wherein the median plane (68) is arranged centrally between the first transverse side (32) and the second transverse side (34).

15. Vacuum cleaning device according to claim 14, characterized by the fact that the suction unit (40) is inclined relative to the central plane (68) in the direction of the second transverse side (34).

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