WO2022167212A1 - Druckausgleichsvorrichtung und gehäuse, das die druckausgleichsvorrichtung umfasst - Google Patents
Druckausgleichsvorrichtung und gehäuse, das die druckausgleichsvorrichtung umfasst Download PDFInfo
- Publication number
- WO2022167212A1 WO2022167212A1 PCT/EP2022/050965 EP2022050965W WO2022167212A1 WO 2022167212 A1 WO2022167212 A1 WO 2022167212A1 EP 2022050965 W EP2022050965 W EP 2022050965W WO 2022167212 A1 WO2022167212 A1 WO 2022167212A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compensation device
- pressure compensation
- pressure
- woven fabric
- housing
- Prior art date
Links
- 239000012528 membrane Substances 0.000 claims abstract description 29
- 229920001971 elastomer Polymers 0.000 claims abstract description 18
- 239000000806 elastomer Substances 0.000 claims abstract description 18
- 239000004745 nonwoven fabric Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 11
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 claims description 5
- 238000005470 impregnation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 230000001419 dependent effect Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 239000005871 repellent Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
- H05K5/0216—Venting plugs comprising semi-permeable membranes
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
- B32B5/265—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer
- B32B5/266—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a non-woven fabric layer next to one or more non-woven fabric layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
- B01D2239/0233—Island-in-sea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0618—Non-woven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1258—Permeability
-
- 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
- B01D2279/45—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for electronic devices, e.g. computers, hard-discs, mobile phones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1692—Other shaped material, e.g. perforated or porous sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
Definitions
- the invention relates to a pressure equalization device and a housing that comprises the pressure equalization device, the pressure equalization device comprising an inside, an outside and a latticed cage with a gas passage opening, the gas passage opening connecting the inside and the outside as a function of the differential pressure and in a flow-conducting manner, and the gas passage opening being controlled by a gas-permeable Membrane is covered, which would comprise at least one nonwoven fabric.
- Such a pressure compensation device is known from DE 10 2017 003 360 B3.
- the membrane is assigned a pressure relief valve designed as burst protection in a functional parallel circuit, so that the membrane survives an emergency degassing of the inside undamaged and can then continue to be used unchanged in the pressure equalization device.
- Another pressure compensation device is known from EP 2 503 199 A1.
- the previously known pressure compensation device is used for a housing having a dead volume and comprises an open-pored element which has an average pore diameter of 2 to 100 ⁇ m, preferably 5 to 50 ⁇ m.
- the open-pored element can be protected against mechanical stress by a protective element, the protective element being formed by a protective film, for example.
- the protective film can be open-pored or closed.
- a closed protective film serves, for example, as protection during transport and is removed from the open-pored element before the pressure equalization device is put into operation.
- an open-pored protective film can remain on the open-pored element and protects it from gross soiling during the intended use of the pressure compensation device.
- a further pressure equalization device is known from EP 2 554 882 A1 for equalizing an internal pressure in a housing, an electrochemical device being arranged inside the housing.
- the gas-permeable membrane is deformable in response to changes in internal pressure and is made of a PTFE material.
- the membrane normally enables pressure equalization between the inside and the outside. In the event of an undesirably excessive internal pressure in the housing, the membrane is destroyed by a dome designed as an emergency degassing element and must then be replaced with an undamaged membrane in order for the pressure compensation device to continue to operate.
- pressure equalization devices are provided in order to compensate for excessive pressure differences between the inside and outside of a housing, which result in an undesirably high mechanical load on the housing Extreme case could lead to the destruction or failure of components arranged within the housing to avoid.
- the interior of the housing In addition to maintaining the air flow rate for pressure equalization, the interior of the housing must also be protected from the ingress of moisture from the environment by the pressure equalization device.
- liquid media such as oil on the inside of the pressure equalization device, ie inside the housing, the oil must also be prevented from getting from the inside through the pressure equalization device to the outside and thus into the environment.
- porous PTFE membranes are currently used, which work well when new, i.e. allow good pressure equalization and prevent the oil inside the housing from escaping into the environment.
- the pores of the PTFE membrane become blocked by the oil.
- the air flow through the PTFE membrane drops and the pressure difference between the inside and outside increases to an undesirable extent.
- the invention is based on the object of further developing a pressure equalization device in such a way that the aforementioned disadvantages are avoided, in particular that the gas-permeable membrane has consistently good functional properties over a long period of use.
- the membrane should ensure a good pressure equalization permanently and at the same time prevent oil leakage from the inside to the outside in a large temperature range or reduce it to the required minimum.
- the nonwoven layer comprises fibers that are essentially completely encased by an encasing made of an elastomer.
- the elastomer coating of the fibers is oil-repellent.
- the oil-repellent properties of the casing effectively prevent or greatly reduce the escape of oil.
- the oil can be in different states, for example as oil droplets, oil vapour, oil mist or as an oil column.
- the elastomer is formed by an FKM blend.
- FKM blend is particularly advantageous because such a blend is resistant to high temperatures, so that the pressure compensation device can also be operated in a wide temperature range, preferably from -40° C. to +150° C. All usual temperature ranges are covered.
- the elastomer casing can be formed by an elastomer impregnation.
- the elastomer impregnation on the one hand achieves an essentially complete encasing of the fibers and on the other hand a high air permeability of the membrane is essentially retained.
- the membrane is impregnated using a dipping process, which ensures even application and complete encasing of the fibers.
- the coating thickness can be adjusted very precisely by adjusting the concentration at the immersion bath and the number of passes.
- the covering around the fibers is dried or vulcanized, so that the covering around the fibers is vulcanized in the ready-to-use gas-permeable membrane.
- the fibers used are long and arranged lying. Such a configuration is advantageous for an oleophobic surface.
- the non-woven layer has constant air permeability, preferably over the entire temperature range from -40 °C to +150 °C. In this large temperature range, the pressure compensation device therefore always works consistently well.
- the non-woven fabric layer and another non-woven fabric layer are arranged in a functional series connection and form an assembly.
- the additional non-woven fabric layer can be designed as a laminate of non-woven fabric and ePTFE. Such a laminate acts as a barrier layer and in any case reliably prevents liquid from penetrating from the outside through the membrane to the inside.
- the further layer of non-woven fabric can be provided in order to prevent water from entering from the outside through the gas passage opening to the inside.
- the additional nonwoven layer can be arranged on the side of the nonwoven layer facing the outside.
- the nonwoven layer and the further nonwoven layer would preferably form a preassembled unit.
- the non-woven fabric layer and the further non-woven fabric layer are preferably designed to be essentially congruent and form a non-woven fabric composite part.
- the invention also relates to a housing with a pressure compensation device, as described above.
- the housing preferably encloses oil-filled components such as gearboxes, transformers or electric motors.
- FIGS. 1 and 2 Two exemplary embodiments of a pressure compensation device according to the invention are explained in more detail below with reference to FIGS. 1 and 2, which are shown schematically.
- FIG. 1 shows a first exemplary embodiment, in which the gas-permeable membrane only comprises the non-woven fabric layer, with fibers that are encased by the casing made of an elastomer
- FIG. 2 shows a second exemplary embodiment, in which another layer of non-woven fabric is assigned to the membrane.
- FIGS. 1-10 Two exemplary embodiments of a pressure compensation device are shown in FIGS.
- the pressure compensation devices can be used for all types of housings where unwanted differential pressures between the inside 1 and outside 2 should be avoided.
- the pressure compensation devices have an inside 1 and an outside 2 , the pressure from inside a housing (not shown here) acting on the inside 1 and the ambient pressure, usually atmospheric pressure, acting on the outside 2 of the gas-permeable membrane 5 .
- the pressure compensation devices each comprise a latticed cage 3 with the gas passage opening 4, which connects the inside 1 and the outside 2 in a flow-conducting manner, depending on the differential pressure acting on the membrane 5.
- the membrane 5 comprises the porous nonwoven material layer 6.
- the fibers 7 of the nonwoven material layer 6 are essentially completely encased by the casing 8 made of elastomer 9.
- the elastomer 9 in the exemplary embodiments shown here consists of an FKM blend.
- a first exemplary embodiment is shown in FIG.
- FIG. 2 A further exemplary embodiment is shown in FIG. 2, which differs from the exemplary embodiment from FIG.
- the fleece layer 6 is arranged on the inside 1 and the further fleece layer 11 is arranged on the side of the membrane 5 facing the outside 2 .
- the further non-woven fabric layer 11 is designed as a laminate 12 made of non-woven fabric and ePTFE.
- the nonwoven layer 6 with the fibers 7 encased by the casing 8 made of elastomer 9 ensures that oil in its various states is retained on the inside 1 as required, and that the gas-permeable membrane 5 does not penetrate in the direction of the outside 2 and thus in gets into the environment and contaminates it.
- the elastomer impregnation 10 of the non-woven layer 6 prevents oil from adhering to the pores of the non-woven layer 6. The air permeability and thus the function of pressure equalization between the inside 1 and the outside 2 is thus always ensured.
- the further non-woven fabric layer 11 is additionally provided, which is designed as a laminate 12 made of non-woven fabric and ePTFE. This further nonwoven layer 11 prevents the nonwoven layer 6 from being undesirably exposed to large amounts of liquid from the outside 2 which could then penetrate to the inside 1 under unfavorable circumstances.
- the further non-woven fabric layer 11 has no influence on the usage properties of the pressure equalization device.
- the laminate 12 made of non-woven fabric and ePTFE is used when, in addition to being oil-repellent on the inside, waterproofing on the outside is also required.
- the pressure compensation device prevents oil leakage from the inside 1 through the gas-permeable membrane 5 to the outside 2 over a large temperature range and at the same time ensures excellent pressure equalization between the inside 1 and the outside 2 during a long service life.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22700814.1A EP4289234A1 (de) | 2021-02-03 | 2022-01-18 | Druckausgleichsvorrichtung und gehäuse, das die druckausgleichsvorrichtung umfasst |
CN202280009036.9A CN116782989A (zh) | 2021-02-03 | 2022-01-18 | 压力均衡装置和包括该压力均衡装置的壳体 |
US18/263,893 US20240040716A1 (en) | 2021-02-03 | 2022-01-18 | Pressure equalising device and housing comprising the pressure equalising device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021102444.7A DE102021102444A1 (de) | 2021-02-03 | 2021-02-03 | Druckausgleichsvorrichtung und Gehäuse, das die Druckausgleichsvorrichtung umfasst |
DE102021102444.7 | 2021-02-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022167212A1 true WO2022167212A1 (de) | 2022-08-11 |
Family
ID=80035274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/050965 WO2022167212A1 (de) | 2021-02-03 | 2022-01-18 | Druckausgleichsvorrichtung und gehäuse, das die druckausgleichsvorrichtung umfasst |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240040716A1 (de) |
EP (1) | EP4289234A1 (de) |
CN (1) | CN116782989A (de) |
DE (1) | DE102021102444A1 (de) |
WO (1) | WO2022167212A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1939523A1 (de) * | 2005-08-24 | 2008-07-02 | Nitto Denko Corporation | Lüftungsglied |
EP2503199A1 (de) | 2011-03-21 | 2012-09-26 | Carl Freudenberg KG | Druckausgleichsvorrichtung mit Filterfunktion für Gehäuse mit einem Totvolumen |
EP2554882A1 (de) | 2011-08-03 | 2013-02-06 | ElringKlinger AG | Druckausgleichsvorrichtung für ein Gehäuse einer elektrochemischen Vorrichtung |
DE102017003360B3 (de) | 2017-04-06 | 2018-07-19 | Carl Freudenberg Kg | Druckausgleichsvorrichtung für ein Gehäuse |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3219700B2 (ja) | 1996-09-18 | 2001-10-15 | 日東電工株式会社 | ベントフィルタ部材 |
US6451396B1 (en) | 1998-02-13 | 2002-09-17 | Gore Enterprise Holdings, Inc. | Flexure endurant composite elastomer compositions |
DE102015217112B4 (de) | 2015-09-08 | 2021-05-12 | Bayerische Motoren Werke Aktiengesellschaft | Entlüftung für ein Getriebe |
CN116928411A (zh) | 2018-10-25 | 2023-10-24 | 日东电工株式会社 | 通气部件 |
-
2021
- 2021-02-03 DE DE102021102444.7A patent/DE102021102444A1/de active Pending
-
2022
- 2022-01-18 WO PCT/EP2022/050965 patent/WO2022167212A1/de active Application Filing
- 2022-01-18 US US18/263,893 patent/US20240040716A1/en active Pending
- 2022-01-18 CN CN202280009036.9A patent/CN116782989A/zh active Pending
- 2022-01-18 EP EP22700814.1A patent/EP4289234A1/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1939523A1 (de) * | 2005-08-24 | 2008-07-02 | Nitto Denko Corporation | Lüftungsglied |
EP2503199A1 (de) | 2011-03-21 | 2012-09-26 | Carl Freudenberg KG | Druckausgleichsvorrichtung mit Filterfunktion für Gehäuse mit einem Totvolumen |
EP2554882A1 (de) | 2011-08-03 | 2013-02-06 | ElringKlinger AG | Druckausgleichsvorrichtung für ein Gehäuse einer elektrochemischen Vorrichtung |
DE102017003360B3 (de) | 2017-04-06 | 2018-07-19 | Carl Freudenberg Kg | Druckausgleichsvorrichtung für ein Gehäuse |
Also Published As
Publication number | Publication date |
---|---|
EP4289234A1 (de) | 2023-12-13 |
CN116782989A (zh) | 2023-09-19 |
US20240040716A1 (en) | 2024-02-01 |
DE102021102444A1 (de) | 2022-08-04 |
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