CN111001227A - Fixed ambient air purification device and ambient air purification device assembly - Google Patents

Fixed ambient air purification device and ambient air purification device assembly Download PDF

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Publication number
CN111001227A
CN111001227A CN201910938232.4A CN201910938232A CN111001227A CN 111001227 A CN111001227 A CN 111001227A CN 201910938232 A CN201910938232 A CN 201910938232A CN 111001227 A CN111001227 A CN 111001227A
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CN
China
Prior art keywords
ambient air
air cleaning
housing
cleaning device
outer housing
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Pending
Application number
CN201910938232.4A
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Chinese (zh)
Inventor
A.克洛茨
T.米勒
M.鲍希
P.布尔顿
M.沃尔博尔德
P.泰斯
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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Publication of CN111001227A publication Critical patent/CN111001227A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
    • B01D46/0041—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
    • B01D46/0047—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for discharging the filtered gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B01D46/121—V-type arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/40—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning of environmental air, e.g. by filters installed on vehicles or on streets

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The invention relates to a stationary ambient air cleaning device (10), which is designed in particular for removing dust, in particular fine dust and/or gas, from ambient air, wherein the ambient air cleaning device (10) has a housing (1) with at least one fluid outlet opening (20) and at least one fluid outlet opening (11), at least one filter element (13) arranged between the fluid inlet opening (20) and the fluid outlet opening (11), and an air flow generating device (17), which is designed for generating an air flow from the fluid inlet opening (20) through the filter element (13) to the fluid outlet opening (11). The housing (1) is designed at least in double housing in order to ensure increased safety against various forms of human damage. Furthermore, an ambient air cleaning device assembly with a plurality of ambient air cleaning devices is disclosed.

Description

Fixed ambient air purification device and ambient air purification device assembly
Technical Field
The invention relates to a stationary ambient air cleaning device and an ambient air cleaning device assembly.
Background
In many densely populated areas around the world there is the problem that the ambient air, due to industrial waste gases, road traffic and private fireplaces, in particular in severe weather conditions (no rain, temperature reversal, low wind speeds, no air exchange between high floors) exceeds the limit values for fine dust and/or gases such as ozone, NOx, CO many times. Measures leading to a reduction in the concentration of harmful substances can consist in either avoiding or reducing emissions and/or in separating these harmful substances from the ambient air.
One approach that has been described in the prior art is to use a stationary mounted ambient air purifier to separate the air noxious substances. Such devices usually have a flow-through housing with an inlet and an outlet, in which a blower and a filter are arranged, wherein the filter can be a conventional filter element consisting of a porous and air-permeable filter medium and/or an electrical separator. The ambient air purifier is advantageously placed at a location with an increased concentration of harmful substances, for example in an external area as well as in an internal area, a tunnel, an underground train station, a bus stop or the like.
Such ambient air purifiers are known, for example, from DE 202016102373U 1 in the form of advertising posts or from FR 2787175 a.
However, a disadvantage of the ambient air purifiers described there is that they are not sufficiently equipped for harsh use in particular in urban environments, since they have no protection against human damage at all, which is a great problem in open spaces, however. It can therefore be assumed that the device described there has a high unplanned maintenance outlay and even impairment of the actual function due to the disadvantages of the technical installation caused by human damage. The types of human destruction that can be expected range from insertion into a cigarette butt, through mechanical damage by means of a striking tool, bonding of posters of various types, to entry into the apparatus.
Disclosure of Invention
Starting from this prior art, the object of the present invention is to provide an ambient air cleaning system and an ambient air cleaning device assembly which are at least safeguarded against human damage and therefore have a low unplanned maintenance outlay.
This object is achieved by an ambient air cleaning device having the features of claim 1 and by an ambient air cleaning device assembly having the features of claim 13.
Preferred developments are specified by the corresponding dependent claims.
The stationary ambient air cleaning device according to the invention is in particular designed for removing dust, in particular fine dust and/or gas, from ambient air. The ambient air cleaning device can be installed not only in the outer region but also in the inner region, tunnels, underground railway stations, bus stops, etc. The ambient air purification device has a housing with at least one fluid inlet opening and at least one fluid outlet opening, at least one filter element arranged between the fluid inlet opening and the fluid outlet opening, and an air flow generating device configured to generate an air flow from the fluid inlet opening through the filter element to the fluid outlet opening. The housing is at least double-walled. Advantageously, the outer housing is at least partially gas-permeable.
The functional units of the ambient air cleaning device (ventilator, filter, air-guiding device, control and regulation technology) are optimally protected from external influences by the at least double-housing structure. Even in the case of an exposure to force with a striking tool, firstly only the outer cover is damaged and the actual functional core of the ambient air cleaning device is arranged in the interior in a well-protected manner.
This reduces the cost of maintenance work for eliminating damage and unplanned maintenance, reduces down time, and improves the effectiveness of the ambient air quality, thereby improving the acceptance of the device by the residents. Furthermore, the multi-housing construction is also associated with safety benefits, since the components with voltage in the housing interior are well protected against unauthorized access if necessary.
As a further advantage of the at least multi-shell structure according to the invention, the possibly necessary stiffening elements of the shells may advantageously be placed under the outer cover so that they are not visible from the outside. The outer cover can also be designed to be attractive and/or have a paint coating, for example.
The housing can have, for example, a square, in particular cube-shaped, design. The air flow generating means may in particular be a radial, axial or diagonal blower, but the invention is not limited thereto.
The ambient air cleaning device according to the invention is provided for placement in public exterior spaces, for example at hot spots of hazardous substances in cities, in particular in the immediate vicinity of driveways. In order to be able to purify a large amount of air, the ambient air purification device should have a certain minimum size; its outer dimension should for example in a square housing not be below 0.3m in any spatial direction, wherein a minimum dimension of 0.7m per spatial direction is considered preferred, most preferably 1m and more.
According to a preferred refinement, the housing can have an inner housing configured as a functional housing and an outer housing configured as a covering housing, the filter element and the gas flow generating device being arranged in the inner housing and the inner housing having a fluid inlet opening and a fluid outlet opening. The functional housing itself is a fully functional unit for cleaning the ambient air, while the outer housing accommodates the functional housing, protects it from damage and enables a freedom of shaping separate from the technical limitations of the functional housing.
In particular, a gap of a predetermined width can be present between the inner housing and the outer housing, by means of which gap a further improved protection of the functional housing against external mechanical influences is achieved, so that the inner housing can, for example, remain completely intact even in the event of a strong deformation of the outer housing, since the gap provides a crumple zone to some extent. This can also be of particular importance when the ambient air cleaning device according to the invention is installed in the vicinity of a road, since this minimizes the impact consequences both for the vehicle driver involved in the impact and also for the ambient air cleaning device itself.
In the case of a substantially square housing shape, the fluid inlet opening and the fluid outlet opening can preferably be located on sides of the housing facing away from each other.
According to a further preferred embodiment, the outer housing can have a plurality of replaceable outer housing elements, wherein preferably the outer housing elements are plate-shaped or have at least one surface curvature, in particular a convex surface curvature. The outer housing element can be arranged on the inner housing, for example, wherein this includes not only an indirect fixing but also a direct fixing of the outer housing element relative to the inner housing, i.e. this can also be achieved by one or more additional structural components.
The replaceable outer housing element makes it possible to replace components of the outer housing quickly and simply in the event of optically severe damage. Furthermore, a great variety of designs is achieved, wherein the change of the appearance of the ambient air cleaning device can be achieved very simply by exchanging the outer housing element without having to dismantle the ambient air cleaning device as a whole for this purpose.
Furthermore, the outer housing can be at least partially fluid-permeable at least in the region of the fluid inlet opening and the fluid outlet opening of the inner housing. In the region through which the fluid can flow, the outer housing can have an orifice plate or an elongated grid and/or an open section with a surface area of at least 40%. Thus, in normal operation, starting from the air inlet or the air outlet of the inner housing, a region through which the fluid can flow is traversed.
According to a further preferred development, a secondary flow path can be provided through the gap between the outer housing and the inner housing, which secondary flow path can be traversed at least when the region of the outer housing through which fluid can flow is blocked, wherein ambient air can be fed into the fluid inlet opening of the inner housing and/or purified air can be fed out of the fluid outlet opening of the inner housing through the secondary flow path.
The secondary flow path thus constructed is another important tamper-proof feature: if, without the possibility of an alternative flow path, the region of the outer housing through which the fluid can flow is blocked, for example by a poster, glue, paint or the like, operation of the ambient air cleaning device is no longer possible. However, a pressure-spike-free further operation of the device is also possible via the secondary flow path, at least until the actuation is eliminated in the scope of the next scheduled maintenance.
The secondary flow path can be designed in such a way that in the region of the gap there is at least one secondary suction opening or secondary blow-out opening which is open downwards and/or upwards in the outer housing, which can be present in particular offset and/or covered inwards with respect to the surface of the side of the outer housing, so that this side cannot be easily glued or coated. In the case of the above-described square housing shape, the at least one secondary suction opening or secondary blow-out opening can be present on the upper and/or lower covering surface, preferably in a partially circumferential edge region.
In a further embodiment, at least one of the outer housings, preferably the replaceable outer housing elements, has a surface coating at least in regions, which enables adhesion of the spray paint to be minimized and/or has a profiled and/or structured surface at least in regions and/or is at least in regions of a transparent design.
While damage by graffiti can be avoided or at least easily removed again by the surface coating which reduces the adhesion, a structured or profiled surface is advantageous in that the poster can be poorly adhered or already perforated during adhesion, so that it can be easily removed again. While at least one of the partially transparent outer housings offers the possibility of arranging display elements, such as displays and/or traffic signs and/or lighting devices and/or advertising carriers, under the outer housing. Alternatively or additionally, the inner housing may be at least partially embodied transparently, so that the interior of the device can be seen from the outside.
According to a further, likewise preferred embodiment, the housing can have an inner grid structure, which provides a frame to which the inner housing and/or the outer housing are fixed. The inner grid structure preferably comprises a metallic material, in particular steel, and can be joined, in particular welded, for example by flat profiles. The wall thickness of the flat profile can be from 0.5 mm up to 7 mm, depending on the structural dimensions. A very rigid housing as a whole can be obtained by the inner grid structure, which is important in particular in the case of large structural volumes, in particular for the reason of minimizing sound emissions, influencing the natural frequency of the housing. In the embodiment with an inner grid structure, the outer housing and/or the components of the inner housing can advantageously be produced with a low material investment and/or consist of a plastic material.
Alternatively or additionally, there may be at least one acoustically damped or obstructed acoustic component in the gap between the outer casing and the inner casing. The acoustic component may be an acoustic foam, an acoustic support, an acoustic reflector, and/or a broadband damper. However, the present invention is expressly not limited to the above-described acoustic member.
Furthermore, it can be provided that at least one water separator, in particular a disk separator, is arranged between the inner housing and the outer housing, in particular below the region of the outer housing through which fluid can flow. This provides protection against the ingress of moisture by rain, but also against the ingress of moisture by deliberate attempts to damage using the spray device and/or urine.
In a further embodiment, the flow channel formed by the inner housing and extending from the fluid inlet opening to the fluid outlet opening widens in cross section in the flow direction, wherein the outlet region arranged upstream of the fluid outlet opening is preferably designed as a diffuser. Preferably, the widening of the flow channel starts in a channel section located downstream of the gas flow generating device, which has the effect that the flow velocity in the outlet region is reduced, which has a favorable acoustic effect.
The filter element can comprise a main filter element, in particular designed as a V-filter element or as a bag filter element, and a prefilter element, in particular a nonwoven mat, upstream in the flow direction.
The bag filter may have at least three filter bags, preferably four or more filter bags. The V-shaped filter element may have at least three V-shaped filter units, preferably pleated filter bellows. Filter elements of this type are available on the market in the field of suction filters for gas turbine and/or HVAC systems in many size ranges. Alternatively or additionally, the filter element may be a filter element at least corresponding to the M6 particle filter stage according to DIN EN 779.
Another aspect of the invention relates to an ambient air cleaning device arrangement having a plurality of ambient air cleaning devices according to the invention, which can be connected to one another in a modular manner or can be connected to one another. The ambient air cleaning device arrangement comprises in particular at least two ambient air cleaning devices arranged one above the other, which are in particular screwed to one another.
In an arrangement of ambient air cleaning devices stacked on top of one another, the ambient air cleaning devices can be assembled with respect to one another at a predetermined distance by means of spacer elements arranged between two adjacent ambient air cleaning devices. In particular, the distance can be dimensioned such that it does not impede the flow through the secondary suction opening or the secondary blow-out opening which is present in some embodiments at the cover surface of the upper and/or lower part of the housing of the ambient air cleaning device.
Finally, the ambient air purification assembly can include a base that is attachable to the substrate in the mounting assembly. The substrate may be an above-ground or underground concrete foundation, the quality of which can be determined individually by the skilled person depending on the structural dimensions of the ambient air cleaning device assembly.
Drawings
Other advantages are given by the following description of the figures. Embodiments of the invention are shown in the drawings. The figures, description and claims contain a large number of combined features. The person skilled in the art can also appropriately consider these features individually and conclude other combinations of significance.
Exemplarily showing:
FIG. 1 is an isometric view of an ambient air purification device assembly according to the present invention;
FIG. 2 is a side view of the ambient air purification device assembly facing the interior of the housing in accordance with the present invention;
FIG. 3 is an isometric view of an ambient air purification device according to the present invention, looking into the interior of the housing;
fig. 4a, b are side views looking towards the inside of the housing of another embodiment of an ambient air cleaning device according to the invention.
In the drawings, the same or similar type of components are denoted by the same reference numerals. The drawings are only examples and should not be construed as limiting.
Detailed Description
An ambient air cleaning device assembly 100 according to the invention is shown in an isometric view in fig. 1. The ambient air cleaning device assembly has three ambient air cleaning devices 10 arranged one above the other, which are stacked on top of each other at a predetermined distance 102. The ambient air cleaning device assembly 100 also allows other arrangements of the cube-shaped ambient air cleaning devices 10, such as a side-by-side arrangement. Each of the ambient air cleaning devices 10 is an ambient air cleaner which can function independently, that is to say has a filter element, a blower and associated air inlet and air outlet openings. The ambient air cleaning device assembly 100 has at its lower end a base 106 with which it can be fixed in a mounting assembly to a substrate made of concrete, for example. The total height of the device may be 1.5 to 6 m.
The outer visible surface of the housing 1 of the respective ambient air cleaning device 10 is formed by an outer housing element 181 which is plate-shaped and can be replaced individually, which allows rapid and cost-effective maintenance if said maintenance is strongly visually weakened, for example by human damage.
Fig. 2 now shows an ambient air cleaning device assembly 100 in a side view, wherein the connection of the individual ambient air cleaning apparatuses 10 can be seen by means of a spacer 105 that can be screwed in particular. Furthermore, the components of the device located inside the housing 1 can be seen. The housing 1 is designed as a double housing, wherein it has an inner housing 19 and an outer housing 18. The inner housing 19 is designed as a functional housing in which the air flow generating device 17 and the filter element 13 are arranged and which has an air inlet opening 20 and an air outlet opening 11. The filter element 13 is flowed through during the suction operation and has a prefilter nonwoven 15 on the inflow side, which is fixed by means of a frame 14. The main filter element is here a V-shaped filter element consisting of 8 single-fold bellows. Alternatively, the main filter element can also be a single bellows, a filter mat or a compact filter element.
The air flow generating device 17 is currently a centrifugal blower 17 which has a flow guide screen 16 on the suction side for acoustic reasons.
The inner housing 19 provides a flow channel 192, which flow channel 192 widens in the flow direction S behind the air flow generating device 17 in order to reduce the flow velocity, which is indicated in the drawing by the flow arrow S. Between the inner housing 19 and the outer housing 18 there is a gap 191, through which the outer casing is provided with a deformation space, which gap prevents the equipment technology arranged in the inner housing 19 from being damaged by mechanical action caused by human damage.
The air flow generating device 17 is driven by an electric motor, for which purpose the ambient air cleaning device assembly 100 comprises a current connection 103 which is arranged on a side wall 104 of the base 106 and which is connectable in the mounting assembly with an electrical supply line.
Furthermore, in the housing 1, i.e. in the gap 191 between the inner housing 19 and the outer housing 18, a pollutant sensor 12, in particular a fine dust sensor 12 for measuring PM 2.5 and PM 10, is arranged, by means of which at least one air quality measurement at the air inlet opening 20 can be detected.
The inner housing 19 and the outer housing 18 are connected here by means of an inner grid structure 21, by means of which the housing strength is substantially provided.
Fig. 3 shows an isometric view of the ambient air cleaning device 10 corresponding to that shown in fig. 2, wherein the spatial arrangement of the internal device components can be better seen. Both the inner housing 19 and the wall of the outer housing 18 are partially concealed for this purpose. The outer housing element 181 can be designed as a door supported on the lattice structure 21 on a door hinge and is provided with a lock, by means of which the front nonwoven and the main filter element can be accessed and replaced.
Finally, fig. 4a and 4b show a preferred development of the ambient air purification device 10 according to the invention, which offers the possibility of opening the secondary flow path S' when the fluid-permeable region 182 of the outer housing element 181, below which the air inlet opening 20 of the inner housing 19 and the air outlet opening 11 are present, is blocked, for example, by a person breaking or inadmissibly mounting a poster.
The flow through in the normal state is shown here in fig. 4 a. Air is sucked in from the surroundings through the region 182 of the outer housing element 181 through which fluid can flow (to the right in the drawing), passes through the air inlet opening 20 of the inner housing 19, the filter element 13, the ventilator 17 and finally, behind the widened channel section 192, is blown out again into the surroundings through the air outlet opening 11 of the inner housing and the region 182 of the outer housing element 181 through which fluid can flow (to the left in the drawing). However, if now one or both of the areas 182 of the outer housing element 181 through which fluid can flow are blocked, for example due to poster, glue, paint or other manipulation, the ambient air purification device 10 according to the invention provides a secondary flow path S', which is shown in fig. 4 b. When the flow is no longer possible not only through the suction-side but also through the blow-out-side outer housing element 181, ambient air can be sucked in and blown out via the gap 191 which exists between the inner housing 19 and the outer housing 18, which is schematically illustrated by the flow arrow S'. For this purpose, the outer casing 18 has a secondary suction opening and a secondary blow-out opening 193 on its lower cover face. The contact surface may extend at least partially along an edge of the outer housing, which is oriented orthogonally to the main flow direction (the axis of rotation of the fan 17) (here into the plane of the drawing). By ensuring an independently operable second flow path, it is achieved that the ambient air cleaning device 10 can continue to operate even after an external air intake opening or air blow-out opening has been manipulated, which contributes to a maximum duration of use when used in public spaces and thus effectively to better air quality. However, this second flow path is not only advantageous in the case of handling, but also ensures continued operation in the case of suctioning foreign matter such as leaves, snow, etc.

Claims (15)

1. Stationary ambient air cleaning device (10), which is designed in particular for removing dust, in particular fine dust and/or gas, from ambient air, wherein the ambient air cleaning device (10) has a housing (1) with at least one fluid inlet opening (20) and at least one fluid outlet opening (11), at least one filter element (13) arranged between the fluid inlet opening (20) and the fluid outlet opening (11), and an air flow generating device (17), which is designed for generating an air flow from the fluid inlet opening (20) through the filter element (13) to the fluid outlet opening (11),
the housing (1) is at least double-walled.
2. The stationary ambient air cleaning device (10) according to claim 1, characterized in that the housing (10) has an inner housing (19) configured as a functional housing, in which the filter element (13) and the air flow generating device (17) are arranged, and an outer housing (18) configured as a covering housing, and the inner housing has the fluid inlet opening (20) and the fluid outlet opening (11).
3. The stationary ambient air cleaning device according to claim 2, characterized in that a gap (191) with a predetermined gap width is present between the inner housing (19) and the outer housing (18).
4. The stationary ambient air cleaning device (10) according to claim 2 or 3, characterized in that the outer housing (18) has a plurality of replaceable outer housing elements (181), which are preferably plate-shaped and/or have at least one surface curvature, in particular a convex surface curvature.
5. The stationary ambient air cleaning device (10) according to one of claims 2 to 4, characterized in that the outer housing (18) is configured at least in the region in which the fluid inlet opening (20) and the fluid outlet opening (11) of the inner housing (19) are present to be at least partially penetrated by fluid, wherein preferably the outer housing (18) has an orifice plate or an expansion grid and/or an opening share with a surface area of at least 40% in the region through which fluid can flow.
6. The stationary ambient air cleaning device (10) according to one of claims 2 to 5, characterized in that a secondary flow path (S ') is provided between the outer housing (18) and the inner housing (19) by means of the gap (191), which secondary flow path can be traversed at least when a region of the outer housing (18) through which fluid can flow is blocked, wherein ambient air can be fed into the fluid inlet opening (20) and/or cleaned air can be fed out of the fluid outlet opening (11) by means of the secondary flow path (S '), wherein preferably the secondary flow path (S ') is configured to: so that at least one secondary suction opening or secondary blow-out opening (193) is present in the outer housing section (181) adjoining the gap (191), in particular on at least one cover surface of the outer housing (18).
7. The stationary ambient air cleaning device (10) according to any of claims 2 to 6, characterized in that the outer housing (18), preferably at least one of the replaceable outer housing elements (181)
At least partially with a surface coating capable of minimizing the adhesion of the lacquer, and/or
At least partially having a profiled and/or structured surface and/or
At least partially transparent.
8. The stationary ambient air cleaning device (10) according to any of claims 2 to 7, characterized in that the housing (10) has an inner grid structure (21) providing a frame to which the inner housing (19) and/or the outer housing (18) is fixed, wherein the inner grid structure (21) preferably has or consists of a metallic material, in particular steel.
9. The stationary ambient air cleaning device (10) according to any of claims 3 to 8, characterized in that in the gap (191) between the outer housing (18) and the inner housing (19) there is at least one acoustically damped or obstructed acoustic component, in particular acoustic foam, acoustic support, acoustic reflector, resonator, broadband damper.
10. The stationary ambient air cleaning apparatus (10) according to any of claims 2 to 9, characterized in that at least one water separator, in particular a laminated separator, is arranged in a gap (191) between the inner housing (19) and the outer housing (18), in particular in a region of the outer housing (18) through which fluid can flow.
11. The stationary ambient air cleaning device (10) according to any one of claims 2 to 10, characterized in that a flow channel (192) formed by the inner housing (19) extending from the fluid inlet opening (20) to the fluid outlet opening (11) widens in cross section in the flow direction (S), wherein a discharge region upstream of the fluid outlet opening (11) is preferably configured as a diffuser.
12. The stationary ambient air cleaning device (10) according to one of the preceding claims, characterized in that the filter element (13) has a main filter element and a prefilter element (15), in particular a nonwoven mat, upstream in the flow direction (S), wherein the main filter element is in particular configured as a V-filter element or as a bag filter element.
13. Ambient air cleaning device assembly (100) with a plurality of ambient air cleaning devices which can be modularly interconnected or can be interconnected, characterized in that at least one of the ambient air cleaning devices is an ambient air cleaning device (10) according to at least one of claims 1 to 12.
14. The ambient air cleaning device assembly (100) according to claim 13, characterized in that at least two of the ambient air cleaning devices (10) are arranged on top of each other, in particular are screwed to each other.
15. The ambient air cleaning device assembly (100) according to claim 13 or 14, characterized in that the ambient air cleaning device assembly (100) comprises a base (106) connectable to a substrate in a mounting arrangement.
CN201910938232.4A 2018-10-05 2019-09-30 Fixed ambient air purification device and ambient air purification device assembly Pending CN111001227A (en)

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