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WO2018001892A1 - Élément filtrant, en particulier pour la filtration de gaz, et dispositif de filtration - Google Patents

Élément filtrant, en particulier pour la filtration de gaz, et dispositif de filtration Download PDF

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Publication number
WO2018001892A1
WO2018001892A1 PCT/EP2017/065535 EP2017065535W WO2018001892A1 WO 2018001892 A1 WO2018001892 A1 WO 2018001892A1 EP 2017065535 W EP2017065535 W EP 2017065535W WO 2018001892 A1 WO2018001892 A1 WO 2018001892A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
medium body
filter element
filter medium
flow space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/065535
Other languages
German (de)
English (en)
Inventor
Jörg Menßen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of WO2018001892A1 publication Critical patent/WO2018001892A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B01D46/2411—Filter cartridges
    • B01D46/2414—End caps including additional functions or special forms
    • 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
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air

Definitions

  • Filter element in particular for gas filtration, and filter device technical field
  • the invention relates to a filter element, in particular for gas filtration, with a filter medium body and a flow space at least partially enclosed by the filter medium body and with a distribution element for purge gas according to the preamble of claim 1.
  • the invention further relates to a filter device with such a filter element.
  • an air filter which has a hollow cylindrical filter element with a filter medium body in a filter housing, which is flowed through radially from outside to inside by the air to be cleaned, the cleaned air being discharged axially from the internal flow space becomes.
  • a flow tube of reduced diameter protrudes, is introduced via the purge gas for cleaning the filter medium body opposite to the outflow direction of the purified air of the filter element.
  • the purge gas flows through the filter medium body radially from the inside to the outside, so that detach deposits from the outside of the filter medium body forming the raw side.
  • the purge gas nozzle On the flow tube, via which the purge gas is introduced axially into the flow space of the filter medium body, there is a frontally arranged purge gas nozzle, via which the purge gas introduced under pressure is fanned out in the interior flow space of the filter medium body.
  • the Spülgasdüse has distributed over its circumference a plurality of outflow openings, which are arranged in addition to an axial Hauptabströmö réelle and directed at an angle to the longitudinal axis of the filter element in the direction of the inner wall of the filter medium body.
  • a filter element with integrated flushing gas device which has a projecting into the inner flow space of the filter medium body of the filter element tube section for the introduction of scavenging air, which meets an axially spaced distribution element, which is axially adjustable via retaining legs held in the flow space. Also, the pipe section through which the scavenging air is introduced, can be adjusted axially in the flow space.
  • the object of the invention is to design a filter element with simple structural measures in such a way that cleaning of the filter medium body with purge gas can be carried out in an efficient manner.
  • the filter element according to the invention is preferably used for gas filtration, for example for the filtration of air, in particular in the intake tract of an internal combustion engine of a vehicle.
  • the filter element has a filter medium body through which the fluid to be cleaned flows and at which the cleaning of the fluid takes place.
  • the filter medium body at least partially encloses a flow space which lies on the clean side of the filter medium body and over which the cleaned fluid is discharged from the filter element.
  • a purge gas can be introduced into the inner flow space, which is enclosed by the filter medium body, which flows through the filter medium body opposite to the usual cleaning direction.
  • the purge gas is first introduced into the flow space and passed from the flow space further from the clean side through the wall of the filter medium body to the raw side, so that deposits on the raw side of the filter medium body are removed by the pressure pulse of the purge gas.
  • purge gas for example, air is used.
  • the purge gas can be introduced via a purge gas nozzle into the internal flow space in the filter medium body.
  • the Spülgasdüse is associated with a distribution element, which, however, is arranged at a distance from the Spülgasdüse and is either within or adjacent to the flow space.
  • the distribution element is fixedly arranged on the filter element and can thus perform no relative movement with respect to the filter element.
  • the filter element advantageously comprises the filter medium body and the distribution element, which is fixedly arranged in the filter element.
  • the Spülgasdüse is not necessarily part of the filter element, but a purge gas device, which is arranged on the filter element or a filter housing into which the filter element is inserted. Accordingly, the filter element can be used as a structurally simple prefabricated structural unit comprising the distribution element in the filter housing and replaced as needed. A relative movement of the distribution element in the flow space of the filter medium body is not provided, so that correspondingly also a complex kinematics is not required.
  • the axial length of the distributor element is preferred, relative to the longitudinal axis of the filter element, less than the axial length of the filter medium body.
  • the longitudinal axis of the filter element is formed, for example, in a hollow cylindrical filter medium body of the cylinder axis.
  • the axial extension of the distributor element is in particular at most half the axial length of the filter medium body and may optionally be significantly smaller than half the axial length of the filter medium body, for example a maximum of 20% or a maximum of 10%.
  • the part of the distributor element projecting into the flow space in the filter medium body is only a maximum of half the axial length of the filter medium body or not more than 20% or not more than 10% of the length of the filter medium body.
  • the size specification refers to the entire axial length of the distributor regardless of its position inside or outside the flow space in the filter medium body.
  • This embodiment has the advantage that the distribution element extends only over a small axial length and the flow of the fluid in the flow space during the Filtration of the fluid remains substantially unaffected by the distribution element. Accordingly, a high filtration performance can be achieved.
  • the purge gas is directed via the distribution element in the flow space to the inside of the filter medium body and leads to a pulse which dissolves the deposits on the upstream side of the filter medium body.
  • the axial extension of the distributor element only over a partial length of the filter medium body is sufficient to act on the inside of the filter medium body adjoining the flow space during the rinsing process in a sufficient manner with a flow pulse of the introduced purge gas.
  • a turbulence of the introduced purge gas takes place via the distributor element, which contributes to a uniform loading of the inside of the filter medium body with the purge gas.
  • the outer diameter of the distribution element is significantly smaller than the diameter of the flow space. It may be particularly advantageous that the outer diameter of the distributor element amounts to a maximum of 50% or a maximum of 30% or a maximum of 20% of the diameter of the flow space in the filter medium body. Despite this relatively small outer diameter, the dimensioning of the distributor element for a uniform flow impulse distribution during the rinsing process to the inner wall of the filter medium Dib body.
  • the distribution element is, according to a preferred embodiment, on an end face of the preferably hollow cylindrical filter medium body. It is particularly expedient to arrange the distributor element adjacent to an end face, but within the flow space. In an alternative embodiment, it is also possible to arrange the distribution element on the outside of the flow space, but adjacent to an inflow or outflow side. Furthermore, it is possible for the distribution element to be located partly inside and partly outside the flow space.
  • the distributor element ensures that the impinging purge gas flow is distributed within the flow space in such a way that an at least approximately uniform flow through the filter medium body in the axial and circumferential direction is ensured. According to yet another expedient embodiment, the distribution element is adjacent to the downstream side of the flow space, through which the purified fluid is discharged in the filtration operation.
  • the purge gas is introduced via the outflow side, which impinges on the distribution element.
  • the distribution element is also possible to arrange the distribution element at a distance from the outflow side, for example adjacent to the opposite, closed wall side of the flow space, advantageously also in this embodiment, the supply of the purge gas via the outflow side, in particular via the purge gas, the purge gas in directs the flow space.
  • the filter element with the filter medium body is formed as a hollow cylinder, one end face of the filter medium body preferably closed and the second, opposite end face of the filter medium body is open, which also forms the downstream side for the discharge of the purified fluid from the flow space ,
  • end disks are advantageously arranged on both end faces, wherein an end plate is formed continuously to form a flow-tight, frontal wall, and the second end plate is annular, so that an open downstream side is formed.
  • the end plates cover the filter medium body at its axial end faces fluid-tight.
  • the filter element is, for example, cuboidal or formed with an approximately triangular cross-section, for example by two individual filter medium body include an intermediate flow space, which is located on the clean side of the filter medium body.
  • the discharge of the purified fluid takes place via the outflow side, which is located between the filter medium bodies, wherein on the outflow side preferably also takes place at the same time the introduction of the purge gas.
  • the distribution element is fixedly arranged on the filter element.
  • the attachment takes place for example on an end plate, in particular in the hollow cylindrical design of the filter element, or on a central tube which is arranged on the clean side of the filter medium body and the flow space lining, wherein also in this embodiment, the filter element is preferably formed as a hollow cylinder.
  • the distribution element can be firmly connected to the filter element, for example, with a sprayed or otherwise connected to the filter medium body cover.
  • this end plate is preferably located on the outflow side of the filter element and has an outflow opening for the cleaned fluid.
  • the distributor element is arranged adjacent to the downstream side of the filter element. Furthermore, it may be expedient that the distribution element is fastened adjacent to the outflow side on the filter element, for example on an end disk of a filter medium body or on a support frame in a filter medium body.
  • the distribution element on holding feet, via which the distribution element is attached to the filter element.
  • the support feet do not influence or only slightly the flow conditions in the flow space, they also allow the firm connection of the distribution element with the filter element, such as an end plate or a center tube. Distributed over the circumference several retaining feet can be arranged on the distribution element in order to achieve a uniform support and attachment of the distribution element.
  • the distribution element has a radially outwardly widening outer contour in the flow direction of the introduced purge gas. This ensures that the purge gas stream fans out with the impact on the outer contour of the distribution element and uniformly impinges on the inner wall of the filter medium body, which limits the flow space, so that the filter medium body is flowed through uniformly on its clean side of the purge gas in the direction of the raw side.
  • the distribution element is conical. As a result, a desired fanning of the impinging purging air flow is ensured, wherein at the same time a distribution of the purging air flow over the axial length of the flow space is given.
  • the cone angle (half opening angle) Kel) of the conical distribution element is preferably at least 30 °, for example 30 ° to 45 °.
  • the distribution element has a straight surface lateral surface.
  • the conical surface is correspondingly formed in a straight surface.
  • a non-planar surface of the distribution element is provided, for example, a convex or concave curved surface, in which case a cone-shaped basic shape of the distribution element comes into consideration.
  • distribution element is also possible, for example distribution elements with a straight-surfaced or convexly or concavely curved impact surface, against which the introduced purge gas stream impinges.
  • the filter element comprises a main filter element with a main filter medium body and a secondary filter element with a secondary filter medium body, which is arranged downstream of the main filter medium body with respect to the flow direction during the filtration of the fluid, wherein the secondary filter element is preferably within the main filter element arranged.
  • the main filter medium body and the secondary filter medium body are in series and are flowed through during the filtration of the fluid sequentially from the fluid.
  • the secondary filter medium body may have a significantly lower thickness in the flow direction than the main filter medium body. It is sufficient, for example, to provide a relatively thin filter medium layer of cellulose, non-woven fabric or the like in the secondary filter medium body, which is cylindrical around a flow-through support frame of the secondary filter element.
  • both the main filter medium body and the secondary filter medium body are formed as a hollow cylinder, and further advantageously, the secondary filter medium body is inserted into the main filter medium body.
  • the secondary filter medium body is inserted into the main filter medium body.
  • the main filter medium body and the secondary filter medium body are preferably an annular space in which the fluid collects after flowing through the main filter medium body.
  • the distribution element is connected to the secondary filter element or part thereof.
  • the connection can take place, for example, via an end disk on the secondary filter medium body or via a support frame on the secondary filter medium body.
  • the distributing element can be designed in one piece, in particular as a unit of material, with the end disk or the support frame.
  • the secondary filter medium body and the distributor element are preferably a structural unit and comprise a secondary filter element which is inserted into the flow space in the main filter medium body and connected either to the filter medium body or to a filter housing in which both the main filter element and the secondary filter element can be inserted.
  • the filter medium body of the filter element is preceded by a tangential pre-separator.
  • the medium to be cleaned is first introduced with the introduction into the housing of the filter device in the Tangentialvorabscheider where the pre-separation is carried out before the fluid passes to the raw side of the filter medium body of the filter element.
  • the purge gas device may be part of the filter device and comprise a pressure tank for receiving the purge gas, a pressure line for supplying the purge gas from the pressure tank to the flow space, a valve for regulating the purge gas and the Spülgasdüse over which the purge gas is introduced into the flow space.
  • FIG. 1 shows a section along through a filter device for air filtration, with a hollow cylindrical filter element, in particular main filter element, in which a conical distribution element is integrated, and with a purge gas device for introducing purge gas into a flow space in the filter element,
  • FIG. 2 shows a similar filter device as in FIG. 1, but with a differently designed purge gas device
  • FIG. 3 shows a perspective view of a filter device with integrated purge gas device
  • FIG. 4 shows a section along a hollow cylindrical filter element, in particular main filter element, with a distribution element in a further embodiment
  • FIG. 5 shows a longitudinal section through a filter device with a filter element in a further embodiment, in which a hollow cylindrical secondary filter element is introduced with a distribution element in a hollow cylindrical main filter element, Fig. 6, the secondary filter element of FIG. 5 in an individual view.
  • the embodiments illustrated in the figures relate to a filter device or a filter element for gas filtration, in particular for the filtration of combustion air for internal combustion engines.
  • the filter device 1 shown in FIG. 1 has a filter element 2 in a filter housing 3.
  • the filter element 2 is preceded by a Tangentialvorabscheider 4, in which the air to be cleaned undergoes a pre-separation after insertion into the filter housing 3, are deposited in the larger particles of dirt before hitting the filter element 2.
  • the filter element 2 is hollow-cylindrical. Det and has a correspondingly hollow cylindrical filter medium body 5, which is closed at its axial end faces of one end plate 6, 7.
  • the filter medium body 5 is flowed through radially from outside to inside by the air to be cleaned, so that the outer lateral surface forms the raw side and the inner circumferential surface of the filter medium body 5 the clean side.
  • the filter medium body 5 includes an internal flow space 8, in which collects the purified air, which is discharged axially via an end face 9, which forms the downstream side.
  • the end plate 6 closes the flow space 8 at this end face of the filter medium body, whereas the opposite end plate 7 is annular and only the filter medium body 5 seals the front side, but is provided with a central outlet opening and the outflow side 9 leaves open.
  • the air to be purified is first introduced into the pre-separator 4 in the housing 3 in the radial direction, followed by filtration on the filter medium body 5.
  • the purified air is discharged axially from the flow space 8 in the filter medium body 5 according to arrow 11 derived.
  • On the outflow side 9 there is a housing-side flow connection 12 with which the filter device 1 can be connected, for example, to the intake tract of the internal combustion engine.
  • the filter device 1 is equipped with a purging device 13, which comprises a compressed air tank 14, a pressure line 15, a valve 16 and a pipe section 17, to purge gas, in particular air, from the pressure tank 14 into the flow chamber 8 inside the filter medium body 5 initiate.
  • the purge gas is introduced under increased pressure into the flow space 8 and flows through the filter medium body radially from the inside to the outside, so that deposited on the outside contaminants are dissolved.
  • the dissolved impurities can be discharged via a discharge port 18 from the filter device 1.
  • the pipe section 17 is integrated into the flow connection 12 and guided radially - relative to the longitudinal axis 19 of the filter device 1 - through the wall of the flow connection 12, wherein a front section 17a is angled by 90 ° in the longitudinal direction of the longitudinal axis 19.
  • the front portion 17a forms a Spülgasdüse, the immediate upstream of the outflow side 9 of the flow space 8 and via which the purge gas passes into the flow space 8.
  • a distribution element 20 which is associated with the purging device 13 and on which the purging gas stream impinges after exiting via the Spülgasdüse 17 a.
  • the distribution element 20 has the task of fanning out and distributing the impinging purge gas stream within the flow space 8, so that the purge gas stream impinges uniformly on the inner wall of the filter medium body 5 and flows through the wall of the filter medium body 5. In this way it is ensured that a cleaning of deposits takes place on the entire outside of the filter medium body 5.
  • the distribution element 20 is firmly anchored within the flow space 8 via a plurality of support feet 21, which are arranged distributed over the circumference on the distribution element 20.
  • the support feet 21 connect the distribution element 20 with a central tube 22 on the inside of the filter medium body 5. It is also possible that the distribution element 20 is held on the end plate 7 on the end face of the filter medium body 5 via the support feet 21.
  • the distribution element 20 preferably has a conical shape as shown, wherein the longitudinal axis of the cone coincides with the longitudinal axis 19 of the filter device 1 and the conical tip faces the purge gas nozzle 17a.
  • the cone angle is in an angle range between 30 ° and 45 °.
  • the purge gas stream can fan out with a radial and an axial component, so that the entire inner side of the filter medium body 5 is struck by the purge gas stream.
  • the conical surface of the distribution element 20 is designed to be straight.
  • the diameter of the purge gas nozzle 17a is smaller than the maximum diameter of the distribution element 20.
  • the maximum diameter of the distribution element 20 is preferably at least equal to or preferably greater than the diameter of the purge gas nozzle 17a.
  • the maximum diameter of the distribution element 20 is at least 50%, more preferably at least 100% larger than the diameter of the purge gas nozzle 17a.
  • the maximum outer diameter of the distribution element 20 is significant fikant lower than the inner diameter of the flow space 8.
  • the outer diameter of the distribution element 20 is a maximum of 50% of the inner diameter of the flow space 8, in particular not more than a third of the inner diameter of the flow space.
  • the outer diameter of the pipe section 17 including the front side Spülgasdüse 17a is significantly less than the diameter of the flow nozzle 12.
  • the outer diameter of the pipe section 17 and the Spülgasdüse 17a is not more than 50%, in particular not more than 25% of the inner diameter of the flow nozzle 12.
  • the outer diameter the flow nozzle 12 corresponds at least approximately to the inner diameter of the flow space 8.
  • Fig. 2 is a variant of the purging device 13, which is associated with the filter device 1, shown. 2, the valve 16 via which the purge gas is regulated from the pressure tank 14 to the purge gas nozzle 17a and into the flow chamber 8, directly to the pressure tank 14.
  • the pressure tank 14 and valve 16 are designed separately.
  • the pressure tank 14 is disposed on the filter housing 3 of the filter device 1, pressure tank 14 and filter housing 3 may be integrally formed be.
  • the pressure line 15 leads from the pressure tank 14 to the valve 16, to which the pipe section 17 is connected to the front-side Spülgasdüse 17 a, wherein the pipe section 17 is fixed to the housing-side flow nozzle 12 and the Spülgasdüse 17 a in the axial direction in the flow chamber 8.
  • the direction of introduction of the purge gas into the flow space 8 and the discharge of the purified air from the flow space 8 according to arrow 1 1 are opposite.
  • a hollow cylindrical filter element 2 is shown in a longitudinal section in an individual view, wherein the distribution element 20 integrated in the flow space 8 is shown in a variant embodiment.
  • the distribution element 20 has conical shape, but the outer circumferential surface is not straight-sided, but convexly curved outwards.
  • About the shape of the outer surface is on the fanning and widening the impinging purge gas flow influenced. For example, it is possible to apply a larger proportion of the purge gas stream to certain axial sections of the filter medium body 5, in order to clean off larger deposits which are located at the same axial position on the outside of the filter medium body. But it is also possible to achieve a uniform possible action on the inside of the filter medium body on the shape of the distribution element 20.
  • FIG. 5 and 6 show a further exemplary embodiment, wherein FIG. 5 shows a longitudinal section through a filter device with two filter elements, namely a main filter element with a hollow cylindrical main filter medium body and a secondary filter element inserted therein with a secondary filter medium body and FIG shows the secondary filter element with the secondary filter medium body in a single representation.
  • the main filter element is formed analogously to the preceding embodiments and has a hollow cylindrical structure and is lined on its inner side by a central tube or scaffold 22.
  • the main filter medium body 5 is flowed through radially from outside to inside by the fluid to be cleaned.
  • a secondary filter element with a secondary filter medium body 23 is inserted, which is also formed as a hollow cylinder, wherein the secondary filter element comprises a central tube or support frame 24, the carrier of a filter medium layer, as preferred, the secondary filter medium body 24th forms.
  • the filter medium layer of the secondary filter medium body 23 has a significantly smaller radial thickness than the preferably annularly closed, zigzag folded filter bellows formed filter means of the main filter medium body 5.
  • the main filter medium body 5 and the secondary filter medium body 23 in succession so that the secondary filter medium body 23 is located downstream of the main filter medium body 5.
  • the main filter medium body 5 is flowed through radially from outside to inside.
  • the outer diameter of the secondary filter medium body 23 is smaller than the inner diameter of the main filter medium body 5, so that after flowing through the main filter medium body 5, the fluid in an annular space between the main filter medium body 5 and secondary filament 5 termedium body 23 collects.
  • the fluid flows through the secondary filter medium body 23 in the radial direction and collects in the internal flow space 8, which forms the interior space in the secondary filter medium body 23. From the flow space 8, the cleaned fluid passes axially according to arrow 1 1 over the open end side of the secondary filter element to the outside.
  • the opposite end face of the secondary filter medium body 23 is closed by an end plate 25 in a flow-tight manner.
  • the secondary filter element preferably shown, the support frame 24 for the secondary filter medium body 23, is a carrier of the distribution element 20, which preferably forms a structural unit with the secondary filter element, as shown.
  • the distribution element 20 is located adjacent to the outflow side 9 of the secondary filter medium body 23 and lies within the flow space 8 in the interior of the filter medium body 23. Integral with the distribution element 20 are holding feet 21 which project substantially radially outward and project with the center tube. Supporting frame 24 of the secondary filter medium body 23 are connected. Thus, the distribution element 20 is connected via the support feet 21 directly to the central tube or support frame 24.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un élément filtrant qui comprend un corps formant milieu filtrant et un espace d'écoulement, au moins partiellement entouré par le corps formant milieu filtrant, ainsi qu'un élément répartiteur pour un gaz de balayage qui peut être introduit dans l'espace d'écoulement. L'élément répartiteur est disposé à demeure dans l'espace d'écoulement à une certaine distance d'une buse à gaz de balayage.
PCT/EP2017/065535 2016-06-28 2017-06-23 Élément filtrant, en particulier pour la filtration de gaz, et dispositif de filtration Ceased WO2018001892A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016007788.3A DE102016007788A1 (de) 2016-06-28 2016-06-28 Filterelement, insbesondere zur Gasfiltration
DE102016007788.3 2016-06-28

Publications (1)

Publication Number Publication Date
WO2018001892A1 true WO2018001892A1 (fr) 2018-01-04

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PCT/EP2017/065535 Ceased WO2018001892A1 (fr) 2016-06-28 2017-06-23 Élément filtrant, en particulier pour la filtration de gaz, et dispositif de filtration

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DE (1) DE102016007788A1 (fr)
WO (1) WO2018001892A1 (fr)

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DE102019132361A1 (de) 2018-12-10 2020-06-10 Mann+Hummel Gmbh Filtereinrichtung, insbesondere zur Gasfiltration
US20230028125A1 (en) * 2021-07-20 2023-01-26 Mann+Hummel Gmbh Secondary Filter Element and Filter System

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DE102020200945A1 (de) 2020-01-27 2021-07-29 Deere & Company Luftfiltersystem für ein Nutzfahrzeug

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US4666472A (en) * 1985-10-15 1987-05-19 Wehr Corporation Dust collector with deflector means
US4818261A (en) * 1987-10-15 1989-04-04 Beckon Weir E Reversed pulse cleaning filter
EP1547663A2 (fr) 2003-12-24 2005-06-29 L.B. BOHLE PHARMATECHNIK GmbH Dispositif de filtre comprenant un élément filtrant flexible
US9108135B2 (en) 2006-06-19 2015-08-18 Donaldson Company, Inc. Pulse jet air cleaner systems; components; and, methods
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Publication number Priority date Publication date Assignee Title
DE102019132361A1 (de) 2018-12-10 2020-06-10 Mann+Hummel Gmbh Filtereinrichtung, insbesondere zur Gasfiltration
US20230028125A1 (en) * 2021-07-20 2023-01-26 Mann+Hummel Gmbh Secondary Filter Element and Filter System
US12440795B2 (en) * 2021-07-20 2025-10-14 Mann+Hummel Gmbh Secondary filter element and filter system

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