CLEANING DEVICE AND USE

Abstract

A cleaning device (I) for suctioning a volumetric flow of particle-laden suction-air from an environment, includes: an air-receiving opening (2) having a first line cross section (21) for suctioning the volumetric flow of particle-laden suction-air from the environment in an active operating state; a liquid-receiving unit (4) having an immersion tube (3) for receiving a liquid, wherein the immersion tube (3) is connected at a first end (7) to the air-receiving opening (2) for conducting suction air and is designed such that at a second end (8) it is immersed into the receivable liquid such that, in an active operating state, the volumetric flow of particle-laden suction-air flows through the receivable liquid to trap the particles; and a vacuum generator (6) for generating the volumetric flow of suction-air in the active operating state.

Claims

1. A cleaning device (1) for aspirating a suction air volume flow loaded with particles from an environment, the cleaning device comprising an air intake opening (2) having a first conduit cross section (21) and serving to aspirate the suction air volume flow loaded with the particles, aerosols, bacteria and/or viruses from the environment when the cleaning device (1) is in an active mode, a liquid holding unit (4) comprising an immersion tube (3) and serving to hold a liquid, the immersion tube (3) being connected to the air intake opening (2) in a suction-air-conducting manner at a first end (7) and being configured in such a manner that it is immersed in the held liquid in such a manner at a second end (8) that the suction air volume flow loaded with the particles flows through the held liquid when the cleaning device (1) is in active mode so that the particles are retained, and vacuum generating means (6) for generating the suction air volume flow in active mode, wherein a second conduit cross section (22) of the immersion tube (3) for guiding the suction air volume flow is larger than the first conduit cross section (21) of the air intake opening (2) at least at the second end (8).

2. The device according to claim 1, wherein a ratio between the second conduit cross section (22) of the immersion tube (3) and the first conduit cross section (21) of the air intake opening (2) is at least 2.

3. The device according to claim 1, wherein the immersion tube (3) has at least one arched and/or angular deflecting portion (9) and a vertical sinking portion (10), the deflecting portion (9) being configured in such a manner that the suction air volume flow loaded with the particles is deflected relative to an inflow direction (R_ein) and swirled in active mode, and the sinking portion (10) being configured in such a manner that the suction air volume flow deflected in the deflecting portion (9) and swirled in active mode is decelerated relative to a mean inflow velocity by a widened portion of the conduit cross section.

4. The device according to claim 3, wherein the deflecting portion (9) is configured in such a manner that the suction air volume flow loaded with the particles is deflected by a deflection angle (β) greater than 60° relative to the inflow direction (R_ein) in active mode.

5. The device according to claim 3, wherein the immersion tube (3) is disposed in the liquid holding unit (4) in such a manner that the sinking portion (10) extends along a vertical axis (V) in such a manner that, in active mode, the suction air volume flow sinks vertically and thus flows into the liquid essentially perpendicular to the liquid surface formed by the held liquid when the cleaning device (1) is in standby mode.

6. The device according to claim 1, wherein the immersion tube (3) has an exit area (15) with a plurality of openings (14) for forming a coarse filter (17) in the area of the sinking portion (10), the openings (14) being formed by a plurality of rod-shaped pins (16)— in the manner of slots and/or gaps, the pins being disposed and/or oriented parallel to each other.

7. The device according to claim 6, wherein at the second end (8), the immersion tube (3) has an end face (11) which is connected to a bottom element (12) of the liquid holding unit (4) in such a manner that the suction air volume flow flows out of the immersion tube (3) exclusively through the openings (14) in active mode.

8. The device according to claim 1, wherein the cleaning device (1) comprises a droplet separator (13) disposed between the liquid holding unit (4) and the vacuum generating means (6) in a suction-air-conducting manner for retaining liquid droplets and other particles absorbed by the suction air volume flow.

9. The device according to claim 8, wherein the droplet separator (13) comprises a flowward area (18) formed by a plurality of spaced-apart profiled fins (19), a flow channel (20) having at least two deflection areas for the suction air volume flow being formed between each two adjacent fins (19), and/or the flowward area (18) being oriented at a fixation angle (a) between 20° to 70° relative to a horizontal plane (H1).

10. The device according to claim 8, wherein the droplet separator (13) is static and/or immobile and composed of non-rotating elements.

11. The device according to claim 1, wherein the cleaning device (1) comprises a filter unit (27) for filtering out fine particles carried by the suction air volume flow, the filter unit (27) being disposed in a suction-air-conducting manner between the droplet separator (13) and the vacuum generating means (6) in a suction air path (29) formed in the cleaning device (1) by the suction air volume flow in active mode.

12. The device according to claim 11, wherein the filter unit (27) comprises a seat unit (28) for an exchangeable fabric filter (30), the seat unit (28) being configured in such a manner that the suction air volume flow flows through the fabric filter (30) in active mode so that the fine particles are retained.

13. The device according to claim 1, wherein the cleaning device (1) comprises UV- and/or UVC-light generation means (34) disposed in the cleaning device (1) in such a manner that the suction air path (28) is partially illuminated in such a manner, along a passage of the suction air path (29), that the suction air volume flow generated in active mode is fully illuminated in order to kill carried viruses or germs.

14. (canceled)

15. (canceled)

16. The device according to claim 2, wherein the ratio is at least 3.

17. The device according to claim 2, wherein the ratio is at least 3.5.

18. The device according to claim 4, wherein the deflection angle (β) is greater than 70°.

19. The device according to claim 4, wherein the deflection angle (β) is greater than 80°.

20. The device according to claim 4, wherein the deflection angle (β) is about 90°.

21. The device according to claim 9, wherein the fixation angle (α) is between 30° to 60°.

22. The device according to claim 9, wherein the fixation angle (α) is between 40° to 50°.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Other advantages, features and details of the invention are apparent from the following description of preferred embodiment examples and from the drawings.

[0056] FIG. 1: is a perspective view of a preferred embodiment of a cleaning device according to the invention;

[0057] FIG. 2: is an exploded illustration of the cleaning device known from FIG. 1;

[0058] FIG. 3: is a first section view of the known cleaning device along a vertical plane;

[0059] FIG. 4: is a second section view of the known cleaning device along a horizontal plane;

[0060] FIG. 5: is a third section view of the liquid absorber in perspective B illustrated in FIG. 3;

[0061] FIG. 6: shows a partial section of FIG. 5 on an enlarged scale;

[0062] FIG. 7: is a perspective view of part of an alternative embodiment of the cleaning device according to the invention;

[0063] FIG. 8: shows a section of an upper housing element of the cleaning device according to the invention of FIG. 7;

[0064] FIG. 9: shows the upper housing element of FIG. 8 without an upper exhaust air guiding feature;

[0065] FIG. 10: shows the upper housing element of FIG. 8 with an upper exhaust air guiding feature; and

[0066] FIG. 11: is a schematic illustration of the suction air volume flow in an embodiment of the cleaning device according to the embodiments of FIGS. 7 to 10.

DETAILED DESCRIPTION

[0067] FIG. 1 shows a perspective view of a first preferred embodiment of a cleaning device 1 according to the invention for aspirating a suction air volume flow loaded with particles from an environment.

[0068] Illustrated cleaning device 1 comprises an air intake opening 2, which is configured to aspirate the suction air volume flow from an environment in an active mode of cleaning device 1, air intake opening 2 preferably being connectable to a suction hose (not shown) in a suction-air-conducting manner so as to form in particular a wet vacuum cleaner.

[0069] Alternatively, cleaning device 1 can be used without a suction hose so as to aspirate ambient air directly through air intake opening 2 and thus form an ambient air cleaning device for filtering out aspirated particles.

[0070] Cleaning device 1 comprises an upper housing element 5 and is disposed on four rollers. Closure means 5, which connect upper housing element 5 to a lower housing element 26 of cleaning device 1, are disposed on two opposite side surfaces 23 and 24 of upper housing element 5.

[0071] Air intake opening 2, through which the suction air volume flow, i.e., a particle/air mixture aspirated from the environment, is aspirated in active mode of cleaning device 1, is disposed in lower housing element 26 on front 32 of cleaning device 1. Upper housing element 5 comprises a plurality of ventilation openings 36 (perforations) for a cooling circuit of cleaning device 1.

[0072] Furthermore, air discharge openings 31, through which the suction air volume flow is returned to the environment after a multi-stage cleaning, are disposed on side surfaces 23 and 24. The exact path of the suction air volume flow loaded with the particles and the different cleaning stages of cleaning device 1 according to the invention are described with reference to FIG. 3 and FIG. 4.

[0073] FIG. 2 shows an exploded illustration of the cleaning device 1 known from FIG. 1. As the illustration shows, lower housing element 26 of cleaning device 1 is formed by a liquid holding unit 4, which has a vat for holding liquid and an immersion tube 3. Air intake opening 2, which is formed on front 32 and serves to aspirate the suction air volume flow loaded with the particles from the environment in active mode of cleaning device 1, comprises a first conduit cross section 21 and is connected to a first end 7 of immersion tube 3 of liquid holding unit 4 in a suction-air-conducting manner via a supply conduit 33. Immersion tube 3 protrudes into the held liquid at a second end 8 with the result that the suction air volume flow loaded with the particles flows through the held liquid along a flow path so that the particles are retained and trapped in the liquid in active mode of cleaning device 1. Immersion tube 3 comprises a lid element 35 for forming a cleaning opening so that particles retained in the immersion tube 3 can be removed manually (by operating personnel).

[0074] Upper housing element 5 presses lid element 35 onto immersion tube 3 in an air-tight manner by means of spring means (not shown), closure means 25, which are disposed on either side, locking lid element 35 in a pressurized manner in active mode of cleaning device 1. Advantageously, the air-tight arrangement of lid element 35 on immersion tube 3 prevents the formation of bypasses of the suction air volume flow, which is why the entire suction air volume flow flows through the liquid so that particles are retained in active mode.

[0075] Furthermore, cleaning device 1 illustrated comprises vacuum generating means 6, which are formed by an electric motor in the case at hand, the electric motor generating the suction air volume flow for aspirating an air/particle mixture by rotating in active mode of cleaning device 1. The electric motor is cooled by a cooling circuit using ambient air, the cooling circuit aspirating the air through openings 36 in upper housing element 5.

[0076] The electric motor can preferably be a brushless electric motor. Vacuum generating means 6 can have an air outlet 39, which guides the generated suction air volume flow out of cleaning device 1. In the example of the embodiment of FIGS. 1 to 4, air outlet 39 is a duct which ends in an opening, preferably a lattice opening or a multi-slot opening of upper housing element 5. An alternative configuration in which a low-pressure air outlet is formed is explained with reference to FIGS. 7 to 10.

[0077] Furthermore, vacuum generating means 6 comprise a cooling circuit discharge opening 38, which is formed at the circumference and serves to discharge the aspirated air of the cooling circuit, and a suction air volume flow discharge opening 37, which is formed at the circumference and serves to discharge the suction air volume flow.

[0078] Advantageously, upper housing element 5 comprises no more than two air discharge openings 31, which are each formed by a perforation in side surfaces 23 and 24 of cleaning device 1, so that the air can be discharged from the cooling circuit and the cleaned suction air volume flow can be discharged back into the environment.

[0079] Furthermore, cleaning device 1 comprises a droplet separator 13, through which the suction air volume flow flows, in which process liquid droplets and other particles can be separated from the suction air volume flow because of provided flow channels 20.

[0080] Moreover, the exploded illustration shows that another filter stage of cleaning device 1 is formed by a filter unit 27, which has a seat unit 28 for a fabric filter 30. Seat unit 28 places fabric filter 30 in a suction air path of the suction air volume flow in such a manner that the latter flows through fabric filter 30 so that the particles are retained. Advantageously, the minimum size of the residual particles can be determined by selecting the pore density, which is why this filter stage is suitable in particular for filtering out fine dust.

[0081] FIG. 3 is a sectional illustration of known cleaning device 1 in a vertical plane, suction air path 29, through which the generated suction air volume flow passes in active mode of cleaning device 1, being schematically outlined by directional arrows.

[0082] As mentioned, the suction air volume flow loaded with the particles is aspirated from the environment through air intake opening 2 in active mode of cleaning device 1, air intake opening 2 having a first conduit cross section 21. Air intake opening 2 is in operative connection with a first end 7 of immersion tube 3 of liquid holding unit 4 via a hollow cylindrical supply conduit 33.

[0083] Immersion tube 3 comprises a deflecting portion 9, which is configured in such a manner that the suction air volume flow loaded with the particles is deflected in an essentially vertical outflow direction relative to a horizontal inflow direction R_ein at first end 7 in active mode. Furthermore, immersion tube 3 comprises a sinking portion 10, which extends along a vertical axis V and which is at least partially immersed in the liquid held by liquid holding unit 4.

[0084] According to the invention, immersion tube 3 has a second conduit cross section 22 at second end 8, second conduit cross section 22 being larger than first conduit cross section 21 of air intake opening 2. Advantageously, the widening of the conduit cross section from air intake opening 2 to second end 8 of immersion tube 3 leads to a decrease in the flow velocity of the suction air volume flow. Thus, the flow velocity of the suction air volume flow is reduced as the latter is flowing through the liquid, which is why the cleaning effect during the passage through the liquid is improved. Advantageously as per the invention, the lower flow velocity means that more particles from the suction air volume flow are trapped in the liquid.

[0085] Furthermore, the sectional illustration of FIG. 3 shows that the deflecting portion 9 is configured in such a manner that the conduit cross section widens from first conduit cross section 21 to second conduit cross section 22 and that an angle element having a deflection angle β of 90° is provided, which is why first conduit cross section 21, which is oriented in the vertical plane, transitions into second conduit cross section 22, which extends in a horizontal plane.

[0086] Deflection angle β, which is 90°, causes the suction air volume flow to flow against the inner wall surface of immersion tube 3, which results in a first manipulation of the flow velocity.

[0087] Furthermore, the sectional illustration shows that sinking portion 10 of immersion tube 3 has an exit area 15 at the wall, exit area 15 having a plurality of openings 14 for forming a coarse filter 17, openings 14 being formed by a plurality of rod-shaped pins 16. Pins 16 are oriented parallel to each other and extend along sinking portion 10, two immediately adjacent pins 16 forming openings 14, which are gap-shaped. Since pins 16, which extend along a vertical axis, are connected in an intermediate portion for increasing the stability of immersion tube 3, two adjacent pins 16 always form two gap-like openings 14, which have a width of about 2 mm and a length of about 20 mm and which are offset from each other relative to a vertical axis.

[0088] Advantageously, coarse filter 17 forms a second filter stage of cleaning device 1, which retains large particles not fitting through openings 14, which are 2 mm wide, from the suction air volume flow.

[0089] Moreover, lid element 35, which is disposed on immersion tube 2 against a spring force, forms a maintenance opening and/or a cleaning opening for manually removing particles retained by coarse filter 17 from immersion tube 3.

[0090] Furthermore, the sectional illustration also shows that immersion tube 3 is connected to a bottom element 12 of liquid holding unit 4 at second end 8. For this purpose, end face 11 of immersion tube 3 is in direct contact with bottom element 12 at second end 8. Thus, bottom element 12 forms a barrier for the suction air volume flow, which has the effect that the suction air volume flow flows out of immersion tube 3 through the openings formed at the wall.

[0091] After it has fully flown through the liquid, the suction air volume flow reaches droplet separator 13, which is disposed behind liquid holding unit 4 in a suction-air-conducting manner in suction air path 28 in order to separate liquid droplets absorbed by suction air volume flow during its passage through the liquid from suction air volume flow and return them into liquid holding unit 4. Advantageously, other particles besides the liquid droplets can also be separated from the suction air volume flow in the process, which is why droplet separator 13 constitutes a third cleaning stage of cleaning device 1.

[0092] Furthermore, the position of droplet separator 13 shows that it is disposed at a fixation angle α of 45° relative to a horizontal plane, and the lowermost edge of droplet separator 13, which extends into the drawing plane along a depth axis, is disposed above liquid holding unit 4 in order to facilitate returning the liquid into liquid holding unit 4. Thus, the recovered separated liquid droplets are returned into liquid holding unit 4 because of the weight force acting on them.

[0093] Furthermore, in active mode of cleaning device 1, the suction air volume flow finally flows through filter unit 27, which is disposed between vacuum generating means 6 and droplet separator 13 in a suction-air-conducting manner. Filter unit 27 allows fine particles carried by the suction air volume flow to be filtered out, which can be specifically influenced in an advantageous manner by selecting a pore density of fabric filter 30.

[0094] For orienting and fixing fabric filter 30, filter unit 27 comprises seat unit 28, which is in particular configured to accommodate fabric filter 30 in a clamping manner. Thus, a fourth cleaning stage of cleaning device 1 can be formed in an advantageous manner.

[0095] After flowing through fabric filter 30, the suction air volume flow flows through a passage which is preferably illuminated by UVC light rays generated by means of UVC-light generation means 34. Advantageously, the UVC light rays kill viruses and germs carried by suction air volume flow, which is how a fifth cleaning stage of cleaning device 1 can be formed.

[0096] After flowing through the illuminated passage, the suction air volume flow reaches vacuum generating means 6, which are formed by a rotating electric motor in the case at hand. Then, the cleaned suction air volume flow is discharged back into the environment through known air discharge openings 31 in side surfaces 23 and 24.

[0097] Furthermore, it is noted that the vacuum generating means 6 are disposed in an upper area of cleaning device 1. Advantageously, the lower area, which comes into contact with the liquid, can thus be spatially separated from the upper area of cleaning device 1, which is sensitive to moisture because of the installed electronics.

[0098] FIG. 4 shows a second section view of known cleaning device 1 along a horizontal plane.

[0099] The illustration shows the path of the suction air volume flow along outlined suction air path 29 at the outlet, the suction air volume flow being discharged to the environment first through suction air volume flow discharge opening 37 and then through air discharge opening 31, which is formed in the housing by the perforation, in opposite side surfaces 23 and 24.

[0100] Furthermore, a cooling circuit of vacuum generating means 6 is schematically illustrated, ambient air for cooling vacuum generating means 6 being aspirated through ventilation opening 36 and discharged back into the environment through cooling circuit discharge openings 38, which are disposed at the circumference of vacuum generating means 6, and air discharge opening 31.

[0101] FIG. 5 is a section view of droplet separator 13 from a perspective B indicated in FIG. 3.

[0102] First of all, the section view shows flowward area 18, which extends in a plane and which forms a plurality of spaced-apart profiled fins 19, a flow channel 20 for a partial flow of the suction air volume flow, which strikes flowward area 18 frontally, being formed between each two immediately adjacent fins 19.

[0103] Sheet-metal-like fins 19 have arched profiles in the predefined flow direction along flow channels 20, the profiles forcing the partial flows to change direction and generating a vacuum area. The changes in direction have the effect that the carried liquid droplets experience a centrifugal force because of the inertia due to their mass, the centrifugal force causing the liquid and the carried particles (residual particles) to be absorbed.

[0104] In FIG. 6, the area encircled in FIG. 5 is illustrated on a larger scale. Furthermore, the path of a partial flow of the suction air volume flow during the passage through flow channels 20 of droplet separator 13 is schematically outlined.

[0105] The schematic illustration shows that the arched profile forms deflection areas for the partial flows, which is why the partial flows are forced to change direction at least twice as they are flowing through flow channels 20, the changes in direction causing the carried liquid droplets and residual particles to be separated.

[0106] With reference to FIG. 3, it is noted that flowward area 18 of liquid absorber 13 is selected small and/or smaller compared to second conduit cross section 22 of immersion tube 3. Thus, the flow velocity of the suction air volume flow can be advantageously increased again when the suction air volume flow strikes liquid absorber 13 in order to thus also increase the centrifugal force acting on the liquid droplets and/or the residual particles. Thus, a large portion of the carried liquid droplets can advantageously be separated from the suction air volume flow and be returned into the liquid holding unit.

[0107] FIG. 7 is a perspective view of an alternative embodiment of cleaning device 1 according to the invention with a low-pressure air outlet. FIG. 7 shows cleaning device 1 without an upper housing element 5, which has been removed and is therefore not illustrated. An inner housing element 40 is visible, which can serve to house or cover vacuum generating means 6, for example. Preferably, inner housing element 40 provides sound insulation.

[0108] FIG. 7 further shows a first portion 41 of an air outlet 39 at the outlet of vacuum generating means 6. Multiple mounts 42 for mounting upper housing element 5 on inner housing element 40 are formed around first portion 41 of air outlet 39. Preferably, a damper element 43 can be provided, which can come into contact with the upper housing element for noise suppression. Damper element 43 can preferably be plugged onto mounts 42 and/or can be placed in contact with mounts 42.

[0109] FIG. 8 shows a section of an upper housing element 5 together with a damper element 43. The damper element is located at a bottom 44 of a preferably vat-shaped expansion space 45. Upper housing element 5 has a plurality of recesses 46. Some of recesses 46 can serve to pass fastening means, such as screws, through them in order to connect upper housing element 5 to inner housing element 40, for example. One recess 47 has a larger diameter and extends in the bottom of expansion space 45. First portion 41 of air outlet 39 can be passed through recess 47. Thus, the suction air volume flow of vacuum generating means 6 enters expansion space 45, which has a larger volume than first portion 41, via first portion 41 at the outlet. This leads to a relaxation and a sedation of the flow of the suction air volume flow, which enables a more energy-efficient operation of vacuum generating means 6 and additionally serves the purpose of noise suppression.

[0110] FIG. 9 and FIG. 10 show upper housing element 5 with (FIG. 10) and without (FIG. 9) an upper exhaust air discharge feature 48. Exhaust air discharge feature 48 can advantageously be inserted into and attached to upper housing element 5. Exhaust air discharge feature 48 then forms expansion space 45 in the radially inner part together with upper housing element 5. In the radially outer part, upper housing element 5 and exhaust air discharge feature 48 define a preferably circumferential exhaust gap 49, which guides the suction air volume flow out of cleaning device 1 at the outlet. The separation between expansion space 45 and exhaust gap 49 can advantageously be achieved by separating wall 53, which is provided with passage holes 50. The discharge of the suction air volume flow through expansion space 45 and exhaust gap 49 improves the energy efficiency of vacuum generating means 6 and also has an advantageous impact on the noise or sound generation when the cleaning device is in operation.

[0111] Preferably, an illumination unit can be disposed in exhaust gap 49 and/or expansion space 45, the illumination unit having changeable light properties, preferably a changeable light color, and being linked and/or connected to setting means for setting the power of vacuum generating means 6. Preferably, the illumination unit can be a multi-color LED strip, which particularly preferably extends at least partially in the circumferential direction of air gap 49 or expansion space 45. Thus, the power of vacuum generating means 6 set by the user by means of the setting means can be optically outputted or indicated via upper housing element 5, in particular the open end of air gap 49.

[0112] As can be seen in FIG. 10, exhaust air discharge feature 48 is a single-piece, preferably even monolithic, component and comprises a handle 51 or a part of a handle. Handle 51 can preferably be composed of two parts and comprise two handle shells 52. One handle shell can advantageously be comprised or formed by exhaust air discharge feature 48. Second handle shell 52, which is illustrated in FIG. 9, for example, can be connected to handle shell 52 of exhaust air discharge feature 48 by a plug and/or snap-lock connection.

[0113] FIG. 11 once more schematically illustrates the routing of the suction air volume flow in the embodiments of FIGS. 7 to 10. At the entry of vacuum generating means 6, the suction air volume flow is aspirated with a relatively high pressure or vacuum, as marked by a corresponding arrow. At the outlet, in particular in the area of first portion 41 of air outlet 39, a conical flow distributor 54 is used to distribute the air flow at the motor outlet and thus reduce the wind shear noises and the ventilation noises. Then, a round and/or oval hood is used to disperse the wind pressure and thus reduce the wind speed and the wind noises. The hood can be formed by expansion space 45 and/or exhaust gap 49, for example.

REFERENCE SIGNS

[0114] 1 cleaning device [0115] 2 air intake opening [0116] 3 immersion tube [0117] 4 liquid holding unit [0118] 5 upper housing element [0119] 6 vacuum generating means [0120] 7 first end of the immersion tube [0121] 8 second end of the immersion tube [0122] 9 deflecting portion [0123] 10 sinking portion [0124] 11 end face [0125] 12 bottom element [0126] 13 droplet separator [0127] 14 opening [0128] 15 exit area [0129] 16 pins [0130] 17 coarse filter [0131] 18 flowward area [0132] 19 fin [0133] 20 flow channel [0134] 21 first conduit cross section [0135] 22 second conduit cross section [0136] 23 side surface (first) [0137] 24 side surface (second) [0138] 25 closure means [0139] 26 lower housing element [0140] 27 filter unit [0141] 28 seat unit for a fabric filter [0142] 29 suction air path [0143] 30 fabric filter [0144] 31 air discharge opening [0145] 32 front [0146] 33 supply conduit [0147] 34 UVC light generation means [0148] 35 lid element of the immersion tube [0149] 36 cooling circuit supply air ventilation opening [0150] 37 vacuum generating means suction air volume flow discharge opening [0151] 38 vacuum generating means cooling circuit discharge opening [0152] 39 air outlet [0153] 40 inner housing element [0154] 41 first portion [0155] 42 mounts [0156] 43 damper element [0157] 44 bottom [0158] 45 expansion space [0159] 46 recess [0160] 47 recess [0161] 48 exhaust air discharge feature [0162] 49 exhaust gap [0163] 50 passage holes [0164] 51 handle [0165] 52 handle shell [0166] 53 separating wall [0167] 54 flow distributor [0168] R_ein inflow direction [0169] V vertical axis [0170] H horizontal axis [0171] α fixation angle [0172] β deflection angle