WO2005051521A1 - Cartouche se trouvant dans un dessiccateur d'air - Google Patents

Cartouche se trouvant dans un dessiccateur d'air Download PDF

Info

Publication number
WO2005051521A1
WO2005051521A1 PCT/SE2004/001737 SE2004001737W WO2005051521A1 WO 2005051521 A1 WO2005051521 A1 WO 2005051521A1 SE 2004001737 W SE2004001737 W SE 2004001737W WO 2005051521 A1 WO2005051521 A1 WO 2005051521A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
cartridge according
coalescence
cartridge
coalescence filter
Prior art date
Application number
PCT/SE2004/001737
Other languages
English (en)
Inventor
Mats Olsson
Hans Welin
Ralf Andersson
Original Assignee
Haldex Brake Products Ab
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 Haldex Brake Products Ab filed Critical Haldex Brake Products Ab
Publication of WO2005051521A1 publication Critical patent/WO2005051521A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/004—Draining and drying devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption

Definitions

  • the present invention relates to an exchangeable cartridge of an air dryer for drying and cleaning compressed air in a heavy road vehicle, the cartridge containing desiccant.
  • Background of the Invention Manufacturers of heavy road vehicles, such as trucks and buses, have experienced certain problems with contaminations in the compressed air systems of their vehicles. The problems are mostly caused by an increase in the amount of hydrocarbon compounds in the compressed air systems. The reason for the increase is not fully investigated, but it can have to do with a changed chemical composition of the lubricant for the air compressor (normally the engine oil) and an increase in working temperature for engines and compressors . Also, we see a tendency towards higher pressures in the compressed air systems, at the same time as one-stage piston compressors are still used, which means that the entire air compression occurs in one step.
  • the higher pressures generate more heat than earlier.
  • the increased presence of chemically agressive compunds will mainly cause problems for smaller valves in auxiliary devices, such as cab valves, gearbox valves and so on.
  • the valves may be clogged by ester-like compounds or become slow because the lubricant applied at the mounting of the valves is split and/or washed-away by such hydrocarbon compounds as acetone or benzene and others. It is especially important to keep an eye on the formation of aromatic hydrocarbons, as several of these are cancerogenic .
  • acetone, benzene and other similar hydrocarbon compounds are examples of substances that can contribute to the problem in the valves and in other places with the building-up of coal particles constituting dried residues from oil mist and hydrocarbon compounds downstream of an air dryer in the compressed air system. Due to the high volatility of hydrocarbons a drying-up will occur on surfaces where condensation has occurred due for example to a temperature decrease. The presence of hydrocarbons upstream of the air dryer in the compressed air system leads to the covering of the desiccant therein with an oil layer, so that the lifespan and quality of the desiccant may be decreased, at the same time as the hydrocarbons are transported out in the compressed air system and its components, where problems may arise.
  • coalescence filters in air dryers of the kind referred to in this specification is per se known.
  • the purpose of such filters is to gather and separate away contamining droplets, for example consisting of hydrocarbons.
  • the most relevant example of the use of a coalescence filter in an air dryer is disclosed in WO 01/52973.
  • the filter is arranged in the air dryer canister itself and not in an exchangeable cartridge to be arranged therein and is the first cleaning or drying material for the air to reach.
  • a more favourable cleaning and drying in an exchangeable cartridge may according to the invention be attained in that the cartridge also comprises - in order in the air flow direction and before the desiccant - a pre- filter for preventing larger matters from passing and a coalescence filter for gathering and separating away contamining droplets .
  • a pre- filter before the coalescence filter many coarse particles are prevented from reaching the latter, which accordingly may be easier to regenerate and may get a higher efficiency and useful life. In other words, the contamination load on the coalescence filter is decreased.
  • a further reduction of the load on the coalescence filter may be obtained, if silica gel with large pores is arranged between the prefilter and the coalescence filter.
  • silica gel with fine pores may be arranged after the coalescence filter and a fine-filter after the desiccant .
  • the cartridge has a cylindrical housing provided with a cylindrical dividing wall dividing the housing in an annular outer compartment and a cylindrical central compartment.
  • the prefilter, the silica gel with large pores, the coalescence filter, and the silica gel with fine pores are arranged in the outer compartment and the desiccant and the fine filter in the central compartment .
  • the coalescence filter according to the invention can be regenerated by a flow of regenerating air flowing in a reverse direction. This is a normal procedure for regenerating an air dryer.
  • the separation of the droplets in the coalescence filter may occur both in its upstream and its downstream portion or only - and in most cases preferably - in its upstream portion.
  • the coalescence filter is preferably designed to provide an efficiency defined as filter class F7-F9, preferably F8, in accordance with European Standard SS-EN 779, i.e. a mean efficiency of better than 80%, preferably 90-95%.
  • the coalescence filter contains as its main constituent a layer of borosilicate .
  • a polyester layer and a thread layer may preferably be arranged at either side of the borosilicate layer.
  • a HEPA filter layer (“High Efficiency Particulate Arrestance”) may optionally be arranged - in the air flow direction - between the borosilicate layer and the polyester layer downstream thereof .
  • the coalescence filter may be dimensioned to provide an air flow velocity therethrough below 0.1 m/s and a pressure drop thereover below lOkPa, preferably below 3 kPa.
  • the cartridge is preferably arranged in a canister of the air dryer.
  • the coalescence filter may practically comprise an annular, pleated filter element with a large area for the air to pass through, means being provided for accomplishing an air flow from the outside of the filter element and inwardly.
  • Fig 1 is an exploded perspective view of an air dryer including a cartridge provided with a coalescence filter according to the invention
  • Fig 2 is a vertical section through the cartridge provided with a coalenscence filter according to the invention
  • Fig 3 is a section along the line III-III in Fig 2
  • Fig 4 is a section along the line IV-IV in Fig 2
  • Fig 5 is an exploded perspective view of a coalescence filter according to the invention
  • Fig 6 is a diagrammatic section through a material for a coalescence filter. Description of a Preferred Embodiment A conventional air dryer for a compressed air system in a heavy road vehicle is shown in Fig 1 in an exploded view.
  • the cartridge B shown in Fig 1 and its contents are in many aspects previously known, for example through WO 01/26783, to which reference is made for further details.
  • the cartridge B has a cylindrical housing 1, for example made of a plastic material.
  • the cylindrical cartridge is divided into two compartments - a cylindrical central compartment and an annular outer compartment - by a cylindrical dividing wall 2. Provisions are made in the base member A of the air dryer to allow air into and out of the two compartments in the lower region but also between the two compartments in the upper region of the cartridge B.
  • Compression springs 3 are arranged between a top end of the housing 1 and movable covers 4 and 5 in the outer and central compartments, respectively.
  • the purpose of these springs is to keep the contents of the compartments under certain compression.
  • air to be dried is admitted into the cartridge B at the bottom end of the outer compartment and exits from the cartridge at the bottom end of the central compartment, as is indicated by arrows in Fig 2.
  • a pre-filter 6 which will prevent larger particles, some oil droplets, water, and liquids from passing, silica gel with large pores 7; this will prevent larger hydrocarbon compounds and other chemical compounds from passing and will take up water in liquid form; also later components in the cartridge will be protected; a coalescence filter 8 to be described below, silica gel with fine pores 9; this will prevent smaller hydrocarbon compounds from passing and will take up water in vapour form; also the molecular sieve (see below) will be protected from exposure to free water, desiccant or molecular sieve 10; removes the remaining moisture from the air and lowers the dew point, and a fine-filter 11, which takes up small particles or dust generated in earlier portions of the air dryer .
  • a coalescence filter is thus a filter for gathering therein small droplets into larger drops (that can be drained away) .
  • the coalescence filter 8 can be of a vertical pleated construction, as is indicated in Figs 3 and 4.
  • the coalescence filter 8 may have the construction shown in an exploded view in Fig 5.
  • An annular, pleated filter element 15 is arranged in a housing, comprising an upper and a lower housing portion 16 and 17, respectively, which for example are made of a plastic material.
  • These housing portions 16 and 17 are provided with openings for accomplishing the flow described with reference to Figs 3 and 4 from the outside of the filter element 15 and inwardly.
  • Sealing rings 18 and 19 are provided for preventing flow past the coalescence filter 8.
  • the filter element 15 can be constructed in the following way with reference to Fig 6 : A filter medium layer 20 of borosilicate, which is a microglass air filtration medium, is backed at both sides by a polyester carrier material layer 21. Support at loading and unloading may be provided by a thread net 22 at either side of the carrier layer 21.
  • the filter element 15 is designed to provide a filter efficiency of F7-F9, preferably F8, in accordance with the European Standard SS-EN 779. According to this standard the relationship between particles before and after the filter at a certain air flow is determined and the mean efficiency in % is calculated.
  • HEPA High Efficiency Particulate Arrestance
  • the purpose of the coalescence filter 8 is to further reduce the presence of oil aerosols/hydrocarbon compounds in the air. Components downstream of the coalescence filter will be protected, so that both the life-span and performance are improved. Tests show that the function characteristics of the filter 8 depend on the velocity of the flowing medium
  • coalescence filter 8 Even if the coalescence filter 8 lets the oil mist completely through, it will have a separation effect due to the fact that the small hydrocarbon molecules agglomerate to larger particles, which thereafter can be adsorbed in a downstream layer.
  • the pressure drop over the coalescence filter 8 should be below lOkPa, preferably below 3 kPa .
  • the type of coalescence filter chosen and its positioning in the cartridge are only to be seen as examples. Further, a horisontal typ of filter - instead of the vertical type shown herein - may be employed.
  • the cartridge can be a self- contained unit of a so called spin-on type. Further, the silica gel with large pores prior to the coalescence filter can be dispensed with.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Drying Of Gases (AREA)

Abstract

La présente invention concerne une cartouche remplaçable (B) destinée à un dessiccateur d'air conçu pour sécher et nettoyer de l'air comprimé dans un poids lourd. Cette cartouche contient un desséchant (10), ainsi que, dans l'ordre dans la direction d'écoulement du flux et avant le desséchant (10), un préfiltre (6) conçu pour empêcher le passage de matières plus grosses et un filtre à coalescence (8) conçu pour réunir et séparer des gouttelettes contaminantes.
PCT/SE2004/001737 2003-11-28 2004-11-25 Cartouche se trouvant dans un dessiccateur d'air WO2005051521A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0303190-3 2003-11-28
SE0303190A SE526569C2 (sv) 2003-11-28 2003-11-28 Utbytbar kassett i en lufttorkare

Publications (1)

Publication Number Publication Date
WO2005051521A1 true WO2005051521A1 (fr) 2005-06-09

Family

ID=29729199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/001737 WO2005051521A1 (fr) 2003-11-28 2004-11-25 Cartouche se trouvant dans un dessiccateur d'air

Country Status (2)

Country Link
SE (1) SE526569C2 (fr)
WO (1) WO2005051521A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006048640A1 (fr) * 2004-11-04 2006-05-11 Wabco Automotive Uk Limited Dessicateur d’air ameliore
WO2008017475A1 (fr) 2006-08-08 2008-02-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Dispositif d'alimentation en air comprimé
EP2002876A2 (fr) 2007-06-15 2008-12-17 Bendix Commercial Vehicles Systems, LLC Déshydrateur d'air avec filtre de suppression d'huile
DE102012005308A1 (de) 2011-12-23 2013-06-27 Wabco Gmbh Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW, mit einer Druckluftversorgungsanlage
DE102012007342A1 (de) 2011-12-23 2013-06-27 Wabco Gmbh Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW mit einer Druckluftversorgungsanlage
US8557030B2 (en) 2011-04-06 2013-10-15 Bendix Commercial Vehicle Systems Llc Air dryer assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047240A1 (fr) * 1998-03-16 1999-09-23 Haldex Brake Products Ab Cartouche pour deshumidificateur d'air
WO2001026783A1 (fr) * 1999-10-14 2001-04-19 Haldex Brake Products Ab Procede et dispositif permettant d'epurer l'air d'un systeme d'air comprime
WO2001052973A1 (fr) * 2000-01-20 2001-07-26 Bendix Commercial Vehicle Systems Llc Cartouche de dessiccateur d'air a filtre coalescent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047240A1 (fr) * 1998-03-16 1999-09-23 Haldex Brake Products Ab Cartouche pour deshumidificateur d'air
WO2001026783A1 (fr) * 1999-10-14 2001-04-19 Haldex Brake Products Ab Procede et dispositif permettant d'epurer l'air d'un systeme d'air comprime
WO2001052973A1 (fr) * 2000-01-20 2001-07-26 Bendix Commercial Vehicle Systems Llc Cartouche de dessiccateur d'air a filtre coalescent

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006048640A1 (fr) * 2004-11-04 2006-05-11 Wabco Automotive Uk Limited Dessicateur d’air ameliore
US7727313B2 (en) 2004-11-04 2010-06-01 Wabco Automotive Uk Limited Air dryer
WO2008017475A1 (fr) 2006-08-08 2008-02-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Dispositif d'alimentation en air comprimé
WO2008017474A1 (fr) * 2006-08-08 2008-02-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Dispositif d'alimentation en air comprimé
US8021465B2 (en) 2006-08-08 2011-09-20 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed air supply device
US7972418B2 (en) 2006-08-08 2011-07-05 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Compressed air supply device
US7789950B2 (en) 2007-06-15 2010-09-07 Bendix Commercial Vehicle Systems Llc Air dryer with oil removal filter
EP2002876A3 (fr) * 2007-06-15 2010-02-24 Bendix Commercial Vehicles Systems, LLC Déshydrateur d'air avec filtre de suppression d'huile
EP2002876A2 (fr) 2007-06-15 2008-12-17 Bendix Commercial Vehicles Systems, LLC Déshydrateur d'air avec filtre de suppression d'huile
US8557030B2 (en) 2011-04-06 2013-10-15 Bendix Commercial Vehicle Systems Llc Air dryer assembly
DE102012005308A1 (de) 2011-12-23 2013-06-27 Wabco Gmbh Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW, mit einer Druckluftversorgungsanlage
DE102012007342A1 (de) 2011-12-23 2013-06-27 Wabco Gmbh Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW mit einer Druckluftversorgungsanlage
WO2013091764A2 (fr) 2011-12-23 2013-06-27 Wabco Gmbh Installation d'alimentation en air comprimé, système d'alimentation en air comprimé et véhicule, en particulier véhicule particulier, équipé d'une installation d'alimentation en air comprimé
US9764278B2 (en) 2011-12-23 2017-09-19 Wabco Gmbh Compressed air supply unit, compressed air supply system, and vehicle, in particular passenger car, having a compressed air supply unit
DE102012005308B4 (de) 2011-12-23 2022-03-17 Wabco Gmbh Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW, mit einer Druckluftversorgungsanlage

Also Published As

Publication number Publication date
SE0303190D0 (sv) 2003-11-28
SE0303190L (sv) 2005-05-29
SE526569C2 (sv) 2005-10-11

Similar Documents

Publication Publication Date Title
US4231768A (en) Air purification system and process
US5622537A (en) Filtration arrangement
US6152996A (en) Air cleaner element having incorporated sorption element
US5364456A (en) Filtration arrangement and method
US5427609A (en) Device for cleaning and drying compressed gas
US3464186A (en) Dryer for compressed fluid systems
US6786953B2 (en) Spin-on desiccant cartridge with integral oil removal filter
KR102079405B1 (ko) 압축 공기 처리 설비의 압축 공기 처리를 위한 공기 필터 카트리지
WO2002074422A1 (fr) Appareil de sechage et procede
US6719825B2 (en) Air drying apparatus and method
US20110265655A1 (en) Combination Filter
JP6780059B2 (ja) 圧縮空気乾燥装置
WO1996018449A1 (fr) Ensemble de filtres et cartouche de filtre
EP1635930B1 (fr) Cartouche de dessiccateur d'air
WO2005051521A1 (fr) Cartouche se trouvant dans un dessiccateur d'air
CN1327937C (zh) 带有整体除油过滤器的离心式干燥剂滤筒
EP1839728B1 (fr) Cartouche de dessiccation d'air
RU2224579C1 (ru) Способ фильтрования воздуха и устройство для его осуществления
WO2004045743A9 (fr) Appareil et procede pour filtrer un flux de gaz comportant un aerosol
JPH0443685B2 (fr)
KR102490306B1 (ko) 상용차용 공기 건조기 카트리지
CN1795040B (zh) 空气干燥器筒

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase