SUCTION DEVICE HAVING A HOUSING WHICH ENCLOSES A PROCESS CHAMBER

Abstract

The invention relates to a suction unit (1), having a housing (3) which encloses a process chamber (2) and has at least one volume flow inlet (4) and at least one volume flow outlet (5), wherein the housing (3) conducts the volume flow and, to this end, has a helical contour (32) with at least one turn (31), the at least one volume flow inlet (4) is arranged at the upper end of the helical contour (32) such that the volume flow is introduced tangentially and is conducted downwards along the helical contour (32) inside the process chamber (2), and the volume flow outlet (5) is arranged on the helical axis (33) of the helical contour (32), and a filter body (6) is arranged upstream of the volume flow outlet (5) in the interior of the process chamber (2) through which filter body (6) the volume flow is conducted.

Claims

1. A suction device (1) with a housing (3) surrounding a process chamber (2) with at least one volume flow inlet (4) and at least one volume flow outlet (5), wherein the housing (3) directs the volume flow and for this purpose has a helical contour (32) having at least one turn, wherein said at least one volume flow inlet (4) is arranged at the upper end of the helical contour (32) characterised in that the volume flow is introduced tangentially and is guided downwards along the helical contour (32) in the process chamber (2), wherein the volume flow outlet (5) is arranged on the screw axis of the helical contour (32), wherein a filter body (6) is arranged in front of the volume flow outlet (5) in the interior of the process chamber (2), through which the volume flow is guided.

2. A suction device according to claim 1, characterised in that the volume flow outlet (5) is arranged on the screw axis (33) of the helical contour (32) at the lower end of the housing (3),

3. A suction device according to claim 1 or 2, characterised in that a plurality of volume-flow inlets (4) are arranged at the upper end of the helical contour (32).

4. A suction device according to one of claims 1 to 3, characterised in that a closable opening (7) for emptying the process chamber is arranged in the lower region of the process chamber (2).

5. A suction device according to one of claims 1 to 4, characterised in in that the walls (31) of the housing (3) forming the helical contour (32) rest in the process chamber (2) against a cylindrical filter body (6) inserted therein.

6. A suction device according to one of claims 1 to 5, characterised in that the housing (3) is formed of one piece or of two integral partial elements.

7. A suction device according to one of claims 1 to 6, characterised in that a flange (8) is integrally formed in the lower region of the housing (3), which can cooperate with a bearing formed on a holding device for the housing (3) in such a way that the housing (3) can be tilted.

8. A suction device system according to one of claims 1 to 7, characterised in that a fan (9) generating the volume flow is arranged after the volume flow outlet (5) at the lower end of the housing.

9. A suction device system according to one of claims 1 to 8, characterised in that a dirt collecting formation (10) of the process chamber (2) is formed in the lower region of the housing for solids and liquids separated from the volume flow.

Description

[0024] The invention will be depicted below using the drawings. In detail, the diagrammatical illustrations are as follows:

[0025] FIG. 1 is a schematic oblique view of a suction device according to the invention,

[0026] FIG. 2 is a top view of the suction device of FIG. 1,

[0027] FIG. 3 is a front view of the suction device of FIG. 1, FIG. 4 is a side view of the suction device of FIG. 1,

[0028] FIG. 5 is a rear view of the suction device of FIG. 1,

[0029] FIG. 6 is a schematic sectional view of the suction device of FIG. 2 in the direction A,

[0030] FIG. 7 is a schematic representation of the flow control from above seen on the suction device,

[0031] FIG. 8 is a schematic representation of the volume flow guide seen from the side, and

[0032] FIG. 9 shows a variant of a suction device with a plurality of volume flow inlets and a plurality of turns of the helical contour.

[0033] The same reference numerals in the figures designate the same or equivalent elements.

[0034] FIGS. 1 to 5 show different views of a suction device 1 according to the invention, with a housing 3 enclosing a process chamber 2 with a volume flow inlet 4 and a volume flow outlet 5 (see FIG. 3 or FIG. 6). In this case, the housing 3 directs the volume flow 11 (see FIGS. 6 to 8) and for this purpose has a helical contour 32 having a plurality of turns 31.

[0035] The volume flow inlet 4 at the upper end of the helical contour 32 is arranged so that the volume flow is introduced tangentially and is guided downwards along the helical contour 32 in the process chamber 2, the volume flow outlet 5 (see FIG. 3 or FIG. 6) is arranged on the screw axis 33 of the helical contour 32. The volume flow outlet 5 is arranged at the lower end of the housing 3 on the screw axis 33 of the helical contour 32.

[0036] In order to facilitate emptying of the process chamber filled with collected particles or liquid, a closable opening 7 for emptying the process chamber 2 is arranged in the lower region of the process chamber 2.

[0037] In order to facilitate collecting for solid and liquid substances separated from the volume flow 11, a dirt collecting formation 10 of the process chamber 2 is formed in the lower region of the housing.

[0038] In addition, a flange 8 is integrally formed in the lower region of the housing 3, which (can cooperate with a bearing not shown) formed on a holding device for the housing 3 in such a way that the housing 3 can be tilted via a bearing axis.

[0039] FIG. 6 shows a schematic cross-sectional view of the suction device 1 of FIG. 2 in the direction A. It can be seen that a filter body 6 is arranged in front of the volume flow outlet 5 in the interior of the process chamber 2, through which the volume flow 11 generated by the blower 9 is guided.

[0040] The illustration also clearly shows that the walls 31 forming the helical contour 32 of the housing 3 in the process chamber 2 abut the cylindrical filter body 6 inserted therein and are supported thereon. This enormously increases the pressure stability of the suction device.

[0041] FIGS. 7 and 8 show a diagrammatic representation of the volume flow guidance from above and schematically seen from the side on the suction device. Due to the centrifugal forces and thus due to the deposition of particles in and under the helical walls of the housing and by the filtering medium in the smallest chamber, a highly effective suction device can be suggested.

[0042] FIG. 9 shows one of several conceivable variants of an inventive suction device 1 with a plurality of volume flow inlets 4 and a plurality of turns 31.

LIST OF REFERENCE SIGNS

[0043] 1 Suction device [0044] 2 Process chamber [0045] 3 Housing [0046] 31 Turn [0047] 32 Helical contour [0048] 33 Screw axis [0049] 4 Volume flow inlet [0050] 5 Volume flow outlet [0051] 6 Filter body [0052] 7 Opening [0053] 8 Flange [0054] 9 Fan [0055] 10 Dirt collecting formation