US3553941A - Filtering assembly including a multiplicity of interconnected plenum chambers - Google Patents

Filtering assembly including a multiplicity of interconnected plenum chambers Download PDF

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Publication number
US3553941A
US3553941A US796832A US3553941DA US3553941A US 3553941 A US3553941 A US 3553941A US 796832 A US796832 A US 796832A US 3553941D A US3553941D A US 3553941DA US 3553941 A US3553941 A US 3553941A
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Prior art keywords
filter
housing
air
interconnected
housings
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Expired - Lifetime
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US796832A
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English (en)
Inventor
Hans-Joachim Wittemeier
Gerhard Max Neumann
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Delbag Luftfilter GmbH
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Delbag Luftfilter GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning

Definitions

  • the invention concerns a filter plant for separating suspended materials out of an air flow or gas flow, preferably for the ventilation of rooms which are to be kept clinically clean.
  • Working rooms such as are necessary in the sphere of space travel, electronics, biology and medicine, must be kept biologically clean, and must therefore be supplied with air which has 'been conditioned.
  • the filtered air flowing into the clean room has a slight excess pressure in comparison with the outside air, in order to prevent the entry of external air at likely leak spots, e.g. at windows and doors.
  • the air supplied must furthermore, as a compression flow, ventilate the entire working area, in order to carry immediately out of the working zone particles of dust produced in the work operations.
  • an airfiltering plant In order to sup ply air which is free from dust and germs to these rooms, known as biologically or clinically clean rooms, an airfiltering plant is necessary which satisfies the requirements set out and produces an'approximately laminar air flow, i.e. one which has low turbulence, while insuring the necessary air purity.
  • Filter plants of this type are known wherein along a wall or the ceiling of the room, a plurality of single filter cells, are arranged to generate an air flow which penetrates through the room as a transverse or descending stream.
  • the filter wall is formed by box-like plenum chambers, arranged in juxtaposed and superimposed relationship, in which the separate filter cells or filter packs are sealingly inserted.
  • the rear end of each plenum chamber is as a rule constructed as an entrance port supplied from a pressure-dependent, controllable blower which aspirates the previously cleaned and conditioned air from an air-conditioning plant and passes it to the clean working room through the filter cells or filter packs sealingly inserted in the housings of their plenum chambers.
  • the housing elements in this at rangement are as' a rule constructed in such a way that they can accommodate at. most up to four square filter cells 610 mm. long along the edge and 150 mm. or 292 mm. thick, arranged one above the other, and three filter cells arranged next to one another in numbers sufficient to fill the width of the room.
  • the disposable filter cells inserted in the box elements have the task of cleaning the air flow to a high degree of purity.
  • the air issuing from Patented Jan. 12, 1971 the filter cells of the several plenum chambers passes through the work room in an approximately laminar transverse flow.
  • the object of our present invention is to overcome these disadvantages and to produce an airfilter system which meets the requirements for clinically or biologically clean rooms and in which the leakage problem is substantially solved in that the previously necessary sealing surfaces and pressure inserts are completely omitted.
  • each filter cell spans the base of a tapering housing wall constituting a plenum chamber, the narrow end of this chamber opposite the base being closed.
  • the filter cell is in fluidtight peripheral contact with this housing which is provided at two oppositely sloping lateral surfaces with a pair of coaxially disposed conduits serving as inlet and outlet ports which, when joined to complementary ports of adjacent units, form a manifold for the delivery of the air tothe several plenum chambers terminating at the closely juxtaposed filter cells.
  • each filter cell in a preferably four sided pyramidal or frustopyramidal housing, which may be designed as a disposable part
  • the separate filter cells are accommodated in gastight fashion in their housings already during manufacture, by casting or glueing, so that multiple and expensive sealing measures are no longer necessary.
  • the individual housings can be joined together by means of the interconnected laterally projecting conduits, in series in any desired length as a part of identical units, each row or every two or three rows being provided with a common blower.
  • the rows of filter housings produced in this way can be arranged in any horizontal or vertical array in order to produce a filter Wall satistying the spacial dimensions. Since the lateral surfaces of juxtaposed four-sided housing frames accommodating the filter cells can abut against each other on being joined together, of these housings can be sealingly interconnected, if necessary, by strips of adhesive.
  • the interconnected parts of the adjacent housings in a row can also be sealed off in a simple way.
  • the advantage of the filter plant in accordance with the invention accordingly consists in the simplification of the sealing problems and in a cost saving by the low outlay for equipment.
  • the disposable housings can be manufactured of sound-mufiling material, or coated with such material. Their tapering shape and the abrupt cross sectional change also help prevent the spread of sound.
  • the plenum chambers and their manifolds may be symmetrically duplicated on opposite sides of the array of filter cells 'whereby an entrance manifold and an exit manifold are formed upstream and downstream, respectively, of these cells.
  • the confronting plenum chambers of each unit need not have square or rectangular bases, as in a continuous planar array, so that their housings can be of frustoconical rather than frustopyrimidal shape.
  • FIG. 1 shows diagrammatically an installation according to our invention arranged on one wall of a room
  • FIG. 2 shows diagrammatically a similar installation arranged on the ceiling
  • FIG. 3 shows on a larger scale two housings connected to each other, each accommodating one filter cell of an assembly as illustrated in FIG. 1 or 2;
  • FIG. 4 shows a housing in a further embodiment
  • FIG. 5 shows a top view to FIG. 4
  • FIG. 6 shows a side view to FIG. 5
  • FIG. 7 shows on a larger scale in section a housing accommodating one filter cell
  • FIG. 8 shows a variation of the construction of FIG. 7
  • FIG. 9 shows a further variation of the construction of FIG. 7;
  • FIG. 10 shows two housing units connected together, each consisting of two frusto-conical housing parts
  • FIG. 11 shows the construction of FIG. 10 on a larger scale.
  • FIG. 1 shows a filter wall arranged at one side wall 19 of a work room.
  • the filter wall is constituted by four frustopyramidal housings 2, with filter cells 1, arranged one over the other between an intermediate ceiling 17 and a floor 18 of the work room.
  • the housings are interconnected by ports 3 and 4. Air from an air-conditioning plant (not shown) passes through a pipe 14 and a blower into the interconnected conduits 3 and 4 of the housings or plenum chambers 2.
  • several rows each formed of four superposed housings 2 can be arranged side by side, each row being supplied with air through an individual blower 15.
  • FIG. 2 shows a filter wall similar to that of FIG. 1 installed in the intermediate ceiling 17.
  • the air issuing from the filter cells 1 penetrates the work room as a descending flow.
  • FIG. 3 shows two connected housings 2.
  • the inlet port 4 of each housing 2 terminates in a sleeve 6 representing a female coupling into which the free end of the outlet port 3 of the adjacent housing 2 is inserted, as a mating rnale coupling, in sealed relationship.
  • FIGS. 4 to 6 show another embodiment in which the conduits 3, 4 are foreshortened in relation to the frame part 5 (FIG. 7) of the housing .2 receiving the filter cell 1.
  • the conduits 3, 4 are joined to complementary connecting pieces of the adjacent housings 2 by means of bellows 7 acting as expansion joints.
  • FIG. 5 illustrates the base of the frustopyramidal housing as square.
  • the base of housing 2 accommodating the filter cell 1 has a rim 5.
  • a gastight packing 12 inside rim 5 seals the filter cell 1 against its mounting frame 21.
  • the filter cell is shown to consist of a rough filter 10 and a fine filter 1 1.
  • a suitable cast mass is poured into the space lying above the packing 12.
  • the housing 2 has a flangelike peripheral shoulder 20; the mounting frame 21 of the filter cell 1 is glued in a gastight fashion to the edge 20.
  • FIG. 9 shows another embodiment in which there is a recess 22 around the inside of the mounting frame 21. Edge 20 of the housing engages in this recess.
  • the filter cell 1 is fixed to the housing 2 by a cast mass 13 on the edge 20.
  • FIGS. 10 and 11 show another embodiment in which each unit includes two frustoconical housings 8 and 9. Between them these parts enclose the filter cell 1. Both housings parts 8, 9 have ports 3, 4 which are connected to adjacent units.
  • the air to be filtered is supplied from the air-conditioning plant through a pipe 14 via a blower 15 into the ports 3, 4 of the upper housings 8, penetrates the filter cells 1 and passes through the ports 3, 4 of the lower housings 9 into a pipe 16 through which the filtered air is supplied to a predetermined location of the work room.
  • the two sets of conduits 3, 4 form an entrance manifold and an exit manifold each communicating with a respective set of plenum chambers above and below the intervening filter cells 1.
  • a filtering assembly comprising a multiplicity of identical units each with a housing forming a plenum chamber, said housing tapering from an open broad end to a closed narrow end, and with a filter cell placed across said broad end, said housing being provided on opposite sides with a pair of coaxial lateral conduits forming an inlet port and a complementary outlet port; said units being arrayed in at least one row with the outlet port of any preceding unit connected to the inlet port of the nextfollowing unit to form a throughgoing manifold communicating with said plenum chambers; and a source of high-pressure fluid connected to the first inlet port forming part of said manifold whereby the fluid issues in parallel from the filter cells of all units thus interconnected.
  • each unit comprises a second housing substantially identical with the first-mentioned housing and symmetrically disposed with reference thereto on the opposite side of said filter cell in fluidtight contact therewith, the second housings of all the units of a row being provided with interconnecting lateral inlet and outlet ports forming a discharge manifold communicating with their plenum chambers for receiving filtered fluid from the first-mentioned housings by way of said filter cells.
  • each 5 FOREIGN PATENTS filter cell has a four-sided frame adhesively bonded to the 342599 8/1936 Italy 55493 base of the corresponding housing.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Ventilation (AREA)
US796832A 1968-07-15 1969-02-05 Filtering assembly including a multiplicity of interconnected plenum chambers Expired - Lifetime US3553941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681782065 DE1782065B1 (de) 1968-07-15 1968-07-15 Filteranlage zur abscheidung von schwebstoffen aus einem luft oder gasstrom

Publications (1)

Publication Number Publication Date
US3553941A true US3553941A (en) 1971-01-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US796832A Expired - Lifetime US3553941A (en) 1968-07-15 1969-02-05 Filtering assembly including a multiplicity of interconnected plenum chambers

Country Status (5)

Country Link
US (1) US3553941A (enrdf_load_stackoverflow)
CH (1) CH519686A (enrdf_load_stackoverflow)
DE (1) DE1782065B1 (enrdf_load_stackoverflow)
FR (1) FR1600316A (enrdf_load_stackoverflow)
GB (1) GB1227111A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760568A (en) * 1969-04-29 1973-09-25 Delbag Luftfilter Gmbh Overhead air filter
US4088463A (en) * 1976-05-05 1978-05-09 Frederick L. Fichter Filtration module
US4620869A (en) * 1985-02-04 1986-11-04 Clean Rooms International Clean room head assembly
US5516349A (en) * 1994-05-05 1996-05-14 Pyradia, Inc. Modular dust collector
RU2263806C1 (ru) * 2004-03-10 2005-11-10 ООО "Научно-исследовательский институт природных газов и газовых технологий-ВНИИГАЗ" Воздухоочистительное устройство
RU2280185C1 (ru) * 2005-06-28 2006-07-20 Общество с ограниченной ответственностью "Самара-Авиагаз" Воздухозаборник для газотурбинной установки
RU2280772C1 (ru) * 2005-06-28 2006-07-27 Общество с ограниченной ответственностью "Самара-Авиагаз" Воздухозаборник для газотурбинной установки
RU2747178C1 (ru) * 2020-06-18 2021-04-28 Сергей Владимирович Винокуров Модуль воздухозаборный воздухоочистительного устройства

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760568A (en) * 1969-04-29 1973-09-25 Delbag Luftfilter Gmbh Overhead air filter
US3808777A (en) * 1969-04-29 1974-05-07 Delbag Luftfilter Gmbh Overhead air filter
US4088463A (en) * 1976-05-05 1978-05-09 Frederick L. Fichter Filtration module
US4620869A (en) * 1985-02-04 1986-11-04 Clean Rooms International Clean room head assembly
US5516349A (en) * 1994-05-05 1996-05-14 Pyradia, Inc. Modular dust collector
RU2263806C1 (ru) * 2004-03-10 2005-11-10 ООО "Научно-исследовательский институт природных газов и газовых технологий-ВНИИГАЗ" Воздухоочистительное устройство
RU2280185C1 (ru) * 2005-06-28 2006-07-20 Общество с ограниченной ответственностью "Самара-Авиагаз" Воздухозаборник для газотурбинной установки
RU2280772C1 (ru) * 2005-06-28 2006-07-27 Общество с ограниченной ответственностью "Самара-Авиагаз" Воздухозаборник для газотурбинной установки
RU2747178C1 (ru) * 2020-06-18 2021-04-28 Сергей Владимирович Винокуров Модуль воздухозаборный воздухоочистительного устройства

Also Published As

Publication number Publication date
DE1782065B1 (de) 1972-02-03
CH519686A (de) 1972-02-29
FR1600316A (enrdf_load_stackoverflow) 1970-07-20
GB1227111A (enrdf_load_stackoverflow) 1971-04-07

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