WO1996024430A1 - Bag-type filter device - Google Patents

Bag-type filter device Download PDF

Info

Publication number
WO1996024430A1
WO1996024430A1 PCT/SE1996/000160 SE9600160W WO9624430A1 WO 1996024430 A1 WO1996024430 A1 WO 1996024430A1 SE 9600160 W SE9600160 W SE 9600160W WO 9624430 A1 WO9624430 A1 WO 9624430A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter device
pipe socket
filter
inlet
socket
Prior art date
Application number
PCT/SE1996/000160
Other languages
French (fr)
Inventor
Per Otto Andersson
Original Assignee
Per Otto Andersson
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 Per Otto Andersson filed Critical Per Otto Andersson
Priority to AU46838/96A priority Critical patent/AU4683896A/en
Publication of WO1996024430A1 publication Critical patent/WO1996024430A1/en

Links

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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering

Definitions

  • the present invention relates to a bag-type filter device for mounting in short inlet pipe sockets to ventilation ducts.
  • a filter device of this type has its limitations consisting in the facts that either the length of the filter device is restricted to the length of the pipe socket or the length of the pipe socket has to be increased such that a filter device of requisite length can be mounted in the pipe socket.
  • a solution of the problem usually consists in a replacement of the pipe socket or a part of it by a box containing a filter device taking up a great deal of space, for instance a box containing a number of parallel bag-type filters. If there is no space for a lengthening of the pipe socket or a lateral enlargement of this by arranging a filter box, there is in broad outline only one solution left of the problem to achieve the necessary filter action, viz.
  • openings in the side walls of the ventilation ducts and the openings closing, detachable, tightly fitting doors through which openings bag filters provided with sleeves are laterally insertable to be mounted firmly by the sleeves to retainer means attached to the inside walls of the ducts after which the doors together with sealing means have to be mounted as shown e.g. in the SE 8200764-2.
  • the object of the invention is to achieve a solution of the mentioned problem in which the above rr «ntioned drawbacks are eliminated.
  • an open ended inlet part of the bag-type filter device is provided with a device for sealingly attaching a portion of said openended inlet part of the filter device to the wall of said pipe socket and has an extension corresponding to the length of said pipe socket and is shaped with an extension in the shape of at least one laterally curved, elongated outlet part with a closed end.
  • the fastening can be performed to a reducing socket at the opening of the pipe socket or directly to the end of the pipe socket bv stretching and folding the open end portion of the filter around the edges of the pipe socket and locking in a suitable wav, e.g. bv a mounting belt.
  • Figure 1 a perspective view of a filter device according to a first embodiment
  • Figure 2 is a plan view of the filter in a ventilation duct shown in longitudinal section
  • Figure 3 is a perspective view of the filter device according to another embodiment
  • Figure 4 is a plan view of the filter in Fig.3 in a ventilation duct shown in longitudinal section
  • Figure 5 is a perspective view of a filter device according to a third embodiment.
  • the embodiment of the filter device shown in Fig.l s made of a comparatively thick-walled filter material and is shaped like an L with a tubular inlet part 1 changing to a lateral outlet part 2 and with a closed end part 3 of filter material.
  • the filter device is intended for insertion into the ventilation duct 10 having an end portion provided with a short pipe socket 11.
  • the diameter of the filter device 1,2,3 is a bit less than the diameter of the ventilation duct 10 and the pipe socket 11, and the open end part 4 of the inlet part 1 of the filter is in a suitable way sealingly attached to the end of a reducing socket 12, e.g. bv being folded around the end of the reducing socket 12 and attached by a mounting belt 5.
  • the filter device 1,2,3 acts as a throttlmq means in the ventilation duct 10 and the pipe socket 11 when air is sucked into the ventilation duct, and bv the pressure drop over the walls of the filter the tubular walls 1,2 of the filter will be sucked into and centered in the position shown in Fig.2 in the ventilation duct 10 and the pipe socket 11.
  • a lattice gate (not shown) may be positioned over the ope ng 4 in the usual way.
  • the filter device may also have the shape shown in Fig.3 comprising an inlet part 1 and two opposite, lateral outlet parts 2 with closed ends 4.
  • a filter device is intended for insertion into a ventilation duct 10 with a lateral inlet pipe socket 11, as shown in Fig. .
  • the filter material at least at the open end part 4 of the inlet part 1 is elastic it may be folded back over the end part of the pipe socket 11 and secured by a mounting belt.
  • the open end part 4 of the inlet part 1 may be provided with a sleeve with an enlarged part fitting the end part of the pipe socket.
  • An inlet pipe socket may be positioned at other locations along a ventilation duct, e.g. at an elbow.
  • the filter device will have the shape shown in Fig.5 with an inlet part 1 and two outlet parts 2 with closed ends 3 and mutually forming an angle. Also a third outlet part with a closed end is possible forming an extension of the outlet parts 2 shown in Fig.5 if the filter device is intended for insertion into a corresponding edge portion of a ventilation duct system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention relates to a filter device of tubular bag type for mounting in short inlet pipe sockets (11) to ventilation ducts (10). In order to obtain a filter with a sufficiently effective length this is, according to the invention, comprised of an inlet part (1) of the same length as the pipe socket (11) and at least one laterally bowed, elongated outlet part (2) with a closed end (3) extending a distance within the ventilation duct (10).

Description

Bag- ype Filter Device.
The present invention relates to a bag-type filter device for mounting in short inlet pipe sockets to ventilation ducts.
A filter device of this type has its limitations consisting in the facts that either the length of the filter device is restricted to the length of the pipe socket or the length of the pipe socket has to be increased such that a filter device of requisite length can be mounted in the pipe socket. A solution of the problem usually consists in a replacement of the pipe socket or a part of it by a box containing a filter device taking up a great deal of space, for instance a box containing a number of parallel bag-type filters. If there is no space for a lengthening of the pipe socket or a lateral enlargement of this by arranging a filter box, there is in broad outline only one solution left of the problem to achieve the necessary filter action, viz. arranging openings in the side walls of the ventilation ducts and the openings closing, detachable, tightly fitting doors, through which openings bag filters provided with sleeves are laterally insertable to be mounted firmly by the sleeves to retainer means attached to the inside walls of the ducts after which the doors together with sealing means have to be mounted as shown e.g. in the SE 8200764-2.
All the solutions are unpractical or cumbersome. The object of the invention is to achieve a solution of the mentioned problem in which the above rr«ntioned drawbacks are eliminated.
This is achievedaccording to the invention in that an open ended inlet part of the bag-type filter device is provided with a device for sealingly attaching a portion of said openended inlet part of the filter device to the wall of said pipe socket and has an extension corresponding to the length of said pipe socket and is shaped with an extension in the shape of at least one laterally curved, elongated outlet part with a closed end. In this way it is possible to position a portion or preferably the major portion of the filter device to the ventilation ducts where it always is plenty of space for filters, but where it up to now, has been difficult to place filter devices. To insert a profiled filter through a pipe socket and fasten the open end of the filter to the opening of the pipe socket, however, is verv easv. The fastening can be performed to a reducing socket at the opening of the pipe socket or directly to the end of the pipe socket bv stretching and folding the open end portion of the filter around the edges of the pipe socket and locking in a suitable wav, e.g. bv a mounting belt.
The invention is described more in detail in the following with reference to the attached drawing, schematically showing some embodiments of filter devices according to the invention showing in Figure 1 a perspective view of a filter device according to a first embodiment, Figure 2 is a plan view of the filter in a ventilation duct shown in longitudinal section, Figure 3 is a perspective view of the filter device according to another embodiment. Figure 4 is a plan view of the filter in Fig.3 in a ventilation duct shown in longitudinal section, and Figure 5 is a perspective view of a filter device according to a third embodiment.
The embodiment of the filter device shown in Fig.l s made of a comparatively thick-walled filter material and is shaped like an L with a tubular inlet part 1 changing to a lateral outlet part 2 and with a closed end part 3 of filter material.
As shown in Fig.2 the filter device is intended for insertion into the ventilation duct 10 having an end portion provided with a short pipe socket 11. The diameter of the filter device 1,2,3 is a bit less than the diameter of the ventilation duct 10 and the pipe socket 11, and the open end part 4 of the inlet part 1 of the filter is in a suitable way sealingly attached to the end of a reducing socket 12, e.g. bv being folded around the end of the reducing socket 12 and attached by a mounting belt 5.
The filter device 1,2,3 acts as a throttlmq means in the ventilation duct 10 and the pipe socket 11 when air is sucked into the ventilation duct, and bv the pressure drop over the walls of the filter the tubular walls 1,2 of the filter will be sucked into and centered in the position shown in Fig.2 in the ventilation duct 10 and the pipe socket 11. A lattice gate (not shown) may be positioned over the ope ng 4 in the usual way.
The filter device may also have the shape shown in Fig.3 comprising an inlet part 1 and two opposite, lateral outlet parts 2 with closed ends 4. Such a filter device is intended for insertion into a ventilation duct 10 with a lateral inlet pipe socket 11, as shown in Fig. . If the filter material at least at the open end part 4 of the inlet part 1 is elastic it may be folded back over the end part of the pipe socket 11 and secured by a mounting belt. As an alternative the open end part 4 of the inlet part 1 may be provided with a sleeve with an enlarged part fitting the end part of the pipe socket.
An inlet pipe socket may be positioned at other locations along a ventilation duct, e.g. at an elbow. In that case the filter device will have the shape shown in Fig.5 with an inlet part 1 and two outlet parts 2 with closed ends 3 and mutually forming an angle. Also a third outlet part with a closed end is possible forming an extension of the outlet parts 2 shown in Fig.5 if the filter device is intended for insertion into a corresponding edge portion of a ventilation duct system.
The invention is of course not limited to the embodiments shown and described here, but can be modified in different ways within the scope of the inventive idea defined by the claims. This is valid a.o. in case of special designs of the ventilation ducts in which case shape and diameters or areas of inlet and outlet parts of the filter devices must be adapted to shape and diameters or areas of ventilation ducts as well as pipe sockets.

Claims

C L A I M S
1. A filter device of tubular bag tvpe for mounting within short inlet pipe sockets (11) to ventilation ducts (10), characterized in that an open ended -inlet part (1) of the filter device is provided with a means for seaJ nglv attaching a portion (4) of said open ended inlet part (1) to the wall of said pipe socket and has an extension corresponding to the length of said pipe socket and is shaped with an extension in the shape of at least one laterally curved, elongated outlet part (2) with closed end (3).
2. A filter device as claimed in claim 1, characterized in that the filter device has a less diameter than the ventilation ducts (10) and the pipe socket (11) and with the open ended part
(4) is mounted connected to a reducing socket (12), which is attached to the end part of the inlet pipe socket (11) .
3. A filter device as claimed in claim 1, characterized in that the filter device has a less diameter than the ventilation ducts (10) and the pipe socket (11) and consists of extensible material, the open end portion (4) of which is extensible for attaching to the wall of the pipe socket (11), preferably by folding back over the end portion of the pipe socket.
4. A filter device as claimed in any of claims 1-3, characterized in that the inlet part (1) of the filter device is provided with a an extension comDrisinα two in opposite directions bowed, elongated outlet parts (2) with closed ends (3).
PCT/SE1996/000160 1995-02-09 1996-02-08 Bag-type filter device WO1996024430A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46838/96A AU4683896A (en) 1995-02-09 1996-02-08 Bag-type filter device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9500470A SE504097C2 (en) 1995-02-09 1995-02-09 Hose type filter device
SE9500470-1 1995-02-09

Publications (1)

Publication Number Publication Date
WO1996024430A1 true WO1996024430A1 (en) 1996-08-15

Family

ID=20397146

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000160 WO1996024430A1 (en) 1995-02-09 1996-02-08 Bag-type filter device

Country Status (3)

Country Link
AU (1) AU4683896A (en)
SE (1) SE504097C2 (en)
WO (1) WO1996024430A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005093334A1 (en) * 2004-03-26 2005-10-06 Fredrik Andersson A supply air device with a filter bag including an interconnection between the filter bag an a branch connected to the supply air conduit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434466B (en) * 1982-02-10 1984-07-30 Kemfilter I Soderhamn Ab Filter device for filtering of solid components from air, and with an air-permeable surface substantially larger than the area of the conduit in which the filter device is used

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434466B (en) * 1982-02-10 1984-07-30 Kemfilter I Soderhamn Ab Filter device for filtering of solid components from air, and with an air-permeable surface substantially larger than the area of the conduit in which the filter device is used

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005093334A1 (en) * 2004-03-26 2005-10-06 Fredrik Andersson A supply air device with a filter bag including an interconnection between the filter bag an a branch connected to the supply air conduit

Also Published As

Publication number Publication date
AU4683896A (en) 1996-08-27
SE504097C2 (en) 1996-11-11
SE9500470L (en) 1996-08-10
SE9500470D0 (en) 1995-02-09

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