WO2023213606A1 - Cartouche filtrante à étages multiples encapsulée pour un dispositif de préparation d'eau potable, et dispositif de préparation d'eau potable associé - Google Patents

Cartouche filtrante à étages multiples encapsulée pour un dispositif de préparation d'eau potable, et dispositif de préparation d'eau potable associé Download PDF

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Publication number
WO2023213606A1
WO2023213606A1 PCT/EP2023/060734 EP2023060734W WO2023213606A1 WO 2023213606 A1 WO2023213606 A1 WO 2023213606A1 EP 2023060734 W EP2023060734 W EP 2023060734W WO 2023213606 A1 WO2023213606 A1 WO 2023213606A1
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WO
WIPO (PCT)
Prior art keywords
reverse osmosis
unit
water
connection
capsule
Prior art date
Application number
PCT/EP2023/060734
Other languages
German (de)
English (en)
Inventor
Jens Petersen
Erik Nagel
René Glaubitz
Original Assignee
Invi-Water 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 Invi-Water Gmbh filed Critical Invi-Water Gmbh
Publication of WO2023213606A1 publication Critical patent/WO2023213606A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/04—Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/08—Apparatus therefor
    • B01D61/081—Apparatus therefor used at home, e.g. kitchen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2626—Absorption or adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2649—Filtration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/003—Coaxial constructions, e.g. a cartridge located coaxially within another
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/006—Cartridges
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices

Definitions

  • the present disclosure relates to a (in particular hermetically and/or sterile) encapsulated multi-stage filter cartridge for a continuously and/or semi-continuously operable drinking water supply device for water treatment by means of a reverse osmosis filter stage in households, restaurants or the like. Furthermore, an associated drinking water provision device with the encapsulated multi-stage filter cartridge according to the disclosure is disclosed.
  • Reverse osmosis (household) devices or water treatment systems for tap water available on the market to provide drinking water are equipped with several separate, sequentially / series-connected / flow-through filter cartridges.
  • the several filter cartridges must be changed individually according to a replacement interval recommended by the manufacturer, for example every 6 months.
  • US 2006/0 065601 A1 discloses a water purification system with an activated carbon filter and a reverse osmosis filter in a two-part cartridge, with a head part of the cartridge being designed to be unscrewable by a user for easy filter replacement. This entails the disadvantage of contamination of the interior of the cartridge, in particular the filter, and the risk of subsequent fouling, formation of pathogenic germs such as legionella, etc. Furthermore, as a result, leakage can occur at the connection point of the head part to a corresponding bottom part of the cartridge. Furthermore, US 2006/0 065601 A1 teaches to place an opening in the form of a retentate connection in the bottom part or in the sump of the cartridge.
  • German patent application DE 102020 128968 by the present applicant discloses a drinking water supply device with a drinking water purity control device and an associated method for controlling or automatically ensuring the drinking water purity during drinking water treatment in a continuously and / or semi-continuously operable drinking water supply device with a reverse osmosis system.
  • Unit for use in households, restaurants or the like.
  • the purified water has passed through a first water purification unit (for mechanical filtering of dispersed solid particles) and a subsequent second water purification unit (reverse osmosis unit, set up to generate a permeate stream that is further purified of dissolved solids) as the sequentially connected purification stages or filter processes.
  • a reverse osmosis replacement cartridge see reference number 2 in Fig. 1).
  • These are in fluid connection, for example, via a distributor head, piping, etc.
  • a significant disadvantage is the previously high space requirement of the entire assembly consisting of several separate water purification units / filter stages / exchangeable cartridges. This directly entails the disadvantage of a correspondingly enlarged drinking water supply device. As a result, the range of applications for these devices is reduced, i.e. many conventional drinking water supply devices are simply too space-consuming and large for space-limited situations such as small kitchens, offices, campers.
  • the high space requirement of the entire assembly especially in household appliances, limits the possibility of doing without an under-table system unit. The latter is often undesirable on the consumer side and/or the space required for an under-sink installation may already be primarily used for other purposes, such as a water heater installed on the pipe network below a kitchen sink, etc.
  • the previously high space requirement of the entire assembly makes it difficult or inhibits suitable use as a mobile drinking water supply device, for example for field kitchens, etc.
  • the object of the present invention is therefore to provide a space-saving, compact water purification filter system for a drinking water supply device with a reverse osmosis unit.
  • no technical compromises must be made with regard to the main function of water purification.
  • an effective elimination of any contaminants from drinking water, especially from tap water can still be achieved or ensured in a reliable manner.
  • the water purification filter system should have such a compact / "slim" design in order to enable a purely table-top design of the drinking water supply device with a view to household water purification devices.
  • Another technical task is to significantly simplify the exchange/change of the several water purification units/filter stages with regard to their handling, so that it can also be carried out independently of user influence.
  • Another technical task is to increase as much as possible the (effective) service life of the water purification units/filter stages or other system parts that are sensitive to contamination in order to keep repair, spare parts and consumable costs as low as possible.
  • the service life for certain types of filters, such as carbon filters is legally limited to 6 months in accordance with the above-mentioned Drinking Water Ordinance, i.e. in some cases longer service times are therefore not permitted
  • the term, in particular the effective service life refers to a service life / useful life without a significant decrease in the Filter performance within the service life recommended by the manufacturer or permitted by law.
  • the task relates to preventing an undesirable drop in efficiency/separation over the entire service life / useful life of the water purification units / filter stages.
  • the multi-stage filter cartridge has a reverse osmosis unit and a filtration unit.
  • the filtration unit has at least one mechanical filter stage.
  • the filtration unit is connected upstream of the reverse osmosis unit.
  • the filtration unit and (subsequently) the reverse osmosis unit are arranged in series/sequentially.
  • the filtration unit and (downstream) the reverse osmosis unit are set up to be flowed through one after the other along a flow direction of a (volume) stream of water to be purified.
  • the filtration unit is in fluid communication with the reverse osmosis unit via a filtrate line section.
  • the multi-stage filter cartridge has one, in particular a single, housing capsule.
  • the reverse osmosis unit and the filtration unit are encapsulated together by the housing capsule, in particular hermetically and/or sterilely encapsulated, enclosed.
  • both the reverse osmosis unit and the filtration unit are arranged in the common housing capsule or are encapsulated by it.
  • both the reverse osmosis unit and the filtration unit are placed together in the common housing capsule in order to be closed off or (in particular sterile) protected from the outside or from the environment. So the reverse osmosis unit and the filtration unit together / in combination form an integral and externally encapsulated multi-stage unit.
  • the housing capsule has one, in particular a single, capsule connection unit.
  • the (especially the only) capsule connection unit has a raw water input connection as well as a permeate output connection and a retentate output connection as external connections.
  • the raw water input connection, the permeate output connection and the retentate output connection are (all) in or through the capsule connection unit to form a (spatial or system-technical) unit, in particular adjacent, even more preferably to one another attached, summarized.
  • the raw water inlet connection is designed and/or set up to introduce water to the filtration unit.
  • the permeate output connection is designed and/or set up for water discharge from the reverse osmosis unit on the permeate side.
  • the retentate outlet connection is designed and/or set up for water discharge from the reverse osmosis unit on the retentate side.
  • the term “encapsulated” indicates that the housing capsule or an outer wall/wall of the housing capsule forms a closed (surface) surface.
  • the housing capsule or its outer wall/wall is only interrupted at one (single) point, namely by (exclusively) the capsule connection unit with the or all external connections, or can be fluidly connected (to the outside) through the (single) capsule connection unit.
  • the housing capsule or its outer wall/wall is not interrupted by a retentate output connection.
  • the multi-stage filter cartridge is set up to be used in the assembled state, in particular in a drinking water supply device or fluidly connected to such a device or connected to such, with from the raw water input connection to the permeate output connection and to be filled with water flowing/flowing to the retentate output connection to form a (common and/or connection-related respective) filling level.
  • the multi-stage filter cartridge can be set up so that the (respective) fill level (of the water), in particular a respective fill level (of a retentate stream of water) associated with the retentate output connection, is in the area of the (single) capsule connection unit and/or in an upper area of the multi-stage filter cartridge and / or above the reverse osmosis unit and the filtration unit.
  • the direction specification “top” or “above” denotes a direction that is directed against the gravity-induced flow direction of the water (when the multi-stage filter cartridge is filled) and/or a direction related to a vertical axis (when installed in the installed drinking water supply device) .
  • the multi-stage filter cartridge can be set up to have or maintain a water level within the housing capsule, in particular up to (quasi, in particular up to 5 mm) below the raw water inlet connection or the permeate outlet connection or Retentate output connection.
  • the capsule connection unit can be designed and/or set up for reception by/from or for connection to the drinking water supply device according to the second aspect of the present disclosure.
  • a significant advantage of the multi-stage filter cartridge is that this solution achieves goals that would otherwise be difficult to agree on technically, namely conflicting goals, in particular the high water purification performance (in terms of volume flow, degree of deposition / degree of separation, service life) while at the same time being compact, space-saving and therefore user-friendly .
  • This advantage is largely due to the combined arrangement of the filtration unit, which is used for effective water purification, especially (or simplified) in the micrometer range of coarse particles to be separated, with the reverse osmosis unit, which is used for effective water purification, especially (or simplified) in the nanometer range Fine particles to be separated are achieved in the (only) common housing capsule.
  • the material requirement for components is reduced due to the compact size and the elimination of components (such as a distribution pipe, etc.).
  • the latter has a positive influence through lower manufacturing costs.
  • This also significantly reduces the environmental impact.
  • the principle can be maintained that the reverse osmosis unit is to be cleaned in order to protect it from contamination
  • a mechanical filtration unit must be installed upstream of suspended (solid) particles/suspended matter in raw water.
  • the proposed compact design of the construction does not lead to an impairment of the level of performance or service life of the central reverse osmosis unit.
  • Another advantage is the significant simplification of the logistical storage, ordering and delivery processes. In this respect, only one consumable instead of several needs to be changed regularly at the scheduled maintenance intervals. This concerns a simplification of other complexity that is beneficial for both the manufacturer and the consumer.
  • the filtration unit is set up / can flow through as a first water purification unit for filtration.
  • the term (pre)filtration refers to the (basic process engineering operation) mechanical separation of (raw) water in the input stream dispersed or suspended solid particles to a (pre)filtered filtrate stream of water.
  • the filtration unit or the at least one mechanical filter stage can be free of plasticizers and/or organic solvents and similar additives that are harmful to health. This prevents recontamination of the water.
  • the reverse osmosis unit is arranged as a second water purification unit downstream of the filtration unit and can be flowed through in order to separate the (pre)filtered filtrate stream of water.
  • the separation or a split or a division into a partial stream of a permeate stream (drinking) water further purified from (at least one) dissolved solids and an associated other partial stream of a retentate stream (waste) water takes place.
  • the filtrate stream of water is separated or split into two partial streams (continuously) to separate the (at least one) solid.
  • a permeate stream that is further (finely) purified by means of reverse osmosis results (or flows out) as a partial stream.
  • This one partial stream flows beyond or downstream of the reverse osmosis unit, especially a counter-pressure diffusion membrane, which is why it is referred to as the permeate stream of water.
  • an associated corresponding retentate stream results (or flows out) as another partial stream.
  • This other partial stream remains on this side or upstream of a counter-pressure diffusion membrane of the reverse osmosis unit, which is why it is referred to as the retentate stream of water.
  • the retentate stream of water is enriched in the at least one separated solid to the extent or by the amount (mass) by which the permeate stream is is depleted or further (finely) purified by means of diffusion through the reverse osmosis unit, in particular (counter-pressure diffusion) membrane.
  • the retentate stream of water enriched with the at least one separated solid can in particular be discarded, for example, discharged to a drain, siphon for used water, or fed to another water use, for example as industrial/cleaning water.
  • the retentate stream of water can be approximately two thirds of the pre-filtered stream of water. Accordingly, approximately one third of the water in the pre-filtered stream is water Permeate flow is available after passing through the counter-pressure diffusion membrane. The permeate stream is highly diluted in that it now consists almost entirely of water molecules.
  • the reverse osmosis unit can be designed in the form of a hollow fiber module.
  • This variant increases the separation performance.
  • the reverse osmosis unit can preferably be designed in the form of a bulk-packed reverse osmosis filter.
  • This variant reduces costs and increases robustness.
  • patent document DE 69216718 or EP 0529921 discloses an example in that a semi-permeable membrane module in the form of a spirally wound semi-permeable membrane cartridge is proposed, the membrane cartridge having a central permeate tube with a porous side wall and at least one elongated, generally flat tubular membrane shell, the interior of which contains a permeate passage material.
  • the reverse osmosis unit or the (counter-pressure diffusion) membrane can be free of plasticizers and/or organic solvents and similar additives that are harmful to health. This prevents recontamination of the water.
  • the (process of) osmosis refers to the directed flow of particles through a selectively permeable and/or semi-permeable separating layer or the reverse osmosis unit, in particular the (counter-pressure-diffusion) membrane.
  • a concentration of the at least one dissolved solid in the water (or solvent) equalizes over time through mass transport processes across the membrane.
  • the driving force of spontaneous osmosis is the difference between the chemical potentials of the (at least one) dissolved solid in the phases of the water separated by the reverse osmosis unit, in particular by the (counter-pressure-diffusion) membrane. That (at least one) dissolved solid or those particles (atoms, molecules or ions) of the components to which the reverse osmosis unit, in particular the (counter-pressure diffusion) membrane, is permeable diffuses or diffuses in the direction their lower chemical potential.
  • the (process of) reverse osmosis is the reversal or reversion of the (process of) osmosis by means of (counter) pressure, preferably externally applied.
  • a phase or a compartment (on the permeate flow side) of water (or solvent) in which the concentration of (at least one) dissolved solid is to be reduced or depleted or (finely) cleaned, is through the selectively permeable and / or semi-permeable Separating layer or through the reverse osmosis unit, in particular through the (counterpressure diffusion) membrane, from the other phase or the other (retentate stream side) compartment on the water (or solvent) in which the concentration of the (at least a) dissolved solid is to be increased or enriched, separated or separated.
  • the other phase or the other (retentate stream-side) compartment of the second water purification unit is exposed to a (counter) pressure or reverse osmosis pressure that must be higher than the osmosis pressure caused by the driving potential (of the process).
  • Osmosis to balance concentration occurs naturally or physically.
  • the mass transport process or diffusion across the reverse osmosis unit, in particular the (counter-pressure-diffusion) membrane occurs when there is a (minimum) counter-pressure that exceeds the natural or physical osmosis pressure.
  • the reverse osmosis unit or the (counter-pressure diffusion) membrane can have an atomic lattice size corresponding to the size of the water molecule or approximately 0.275 nanometers.
  • the reverse osmosis unit can be dimensioned/designed or set up so that in the reverse osmosis unit (finely) purified water, i.e. the permeate stream, an aqueous concentration of dissolved solids does not exceed 20 ppm of the (at least one) solid, in particular not more than 8-10 ppm [i.e. 8-10 foreign molecules of the (at least one) solid per 1 million water molecules].
  • the aqueous concentration of dissolved solids in the permeate stream of water indicates the sum or totality of the large number of (at least one) solids dissolved in the water (aqueous or hydrophilic).
  • the term solid includes a salt, a mineral (sometimes referred to as a “mineral”) and/or a metal.
  • the aqueous concentration can be specified or measured or determined or specified as a (so-called) TDS value.
  • TDS value stands for “Total Dissolved Solids”.
  • a solid to be purified or removed or separated from the water according to the disclosure includes in particular: a solid present due to an anthropogenic entry into the environment or into the water cycle, for example a medication and/or a pharmaceutical, such as an antibiotic and/or a hormone; and/or an agricultural substance, for example a fertilizer, a pesticide, an insecticide, etc.; and/or a (micro)plastic particle; and/or a substance immobilized from a shipment such as a landfill, such as a heavy metal ion and/or radioactive ion.
  • the solid comprises a residue or ingredient of all kinds originating from a drinking water installation such as a pipeline at the point of consumption, for example a copper ion and the like, and/or an aqueous or hydrophilic substance (from) from a plastic hose or tank at the point of consumption. dissolved plastic particles, a monomer and/or a plasticizer.
  • the solid further comprises a health-detrimental ingredient of biological origin, in particular a pathogenic germ, for example a bacterium such as legionella(s) and/or a bacterium that can be assigned to a multi-resistant strain, a virus, a mold spore or type of mold, a prion, a DNA fragment or the like.
  • the solid also includes a (molecular) fragment and/or degradation product or other modification of the examples or embodiments mentioned above for the solid. The above list is therefore not intended to be exhaustive.
  • the reverse osmosis unit and the filtration unit can be arranged spaced apart from one another in the housing capsule in order to form a filtrate lumen in the filtrate line section.
  • This design feature serves to decouple the process engineering or balance between the filtration unit and the reverse osmosis unit, i.e. the process engineering degrees of freedom are increased.
  • the raw water inlet connection can be fluidly connected to a raw water inlet side of the filtration unit via a raw water line section in the housing capsule.
  • the raw water input connection is designed or set up to provide an input stream of (raw) water into the housing capsule Initiate filtration unit.
  • the raw water line section is designed or set up to direct the introduced input stream to the raw water inlet side of the filtration unit (or into it). This advantageously increases degrees of freedom with regard to a needs-based process engineering design, the specific construction and the manufacturing assembly.
  • the filtration unit is in fluid communication with the reverse osmosis unit via a filtrate line section.
  • the (total) stream entering from the filtration unit or via the filtrate line section into the reverse osmosis unit (during its operation), i.e. the filtrate stream of water corresponds in balance to the sum of the two (partial) streams emerging from the reverse osmosis unit , i.e. the sum of a permeate stream (drinking) water (i.e. a useful stream of purified drinking water) and a retentate stream of water.
  • the permeate outlet connection can be fluidly connected to a permeate outlet side of the reverse osmosis unit via a permeate line section in the housing capsule.
  • the permeate outlet connection can be fluidly connected to an inner reverse osmosis permeate tube of the reverse osmosis unit via the permeate line section.
  • the permeate output connection is designed or set up to lead the permeate stream (drinking) water emerging (during operation) from the reverse osmosis unit out of the housing capsule.
  • the permeate line section or the reverse osmosis permeate pipe is designed or set up to direct the permeate stream of (drinking) water from the permeate outlet side of the reverse osmosis unit to the permeate outlet connection or via the permeate outlet connection to be derived from the housing capsule.
  • the retentate outlet connection can be fluidly connected to a retentate outlet side of the reverse osmosis unit via a retentate line section in the housing capsule.
  • the retentate output connection is designed or set up to lead the retentate stream (waste) water emerging (during operation) from the reverse osmosis unit out of the housing capsule.
  • the retentate line section is designed or set up to direct the retentate stream (waste) water from the retentate outlet side of the reverse osmosis unit to the retentate outlet connection or to drain it out of the housing capsule via the retentate outlet connection.
  • the filtration unit can have a plurality of series-connected mechanical filter stages.
  • the filtration unit as a first water purification unit for the mechanical separation/(pre)filtration of solid particles dispersed or present in suspension in the input stream of (raw) water to form a mechanically (pre)filtered filtrate stream of water, can in principle be divided into several suitable ones (Flow) filter stages can be divided. It is conceivable that the several filter stages are each designed as a surface filter or as a depth filter or as a cake filter. For example, a combination of a surface filter for pre-separation/screening out larger particles with (downstream) a (flow-through) depth filter for further separation of remaining particles may be preferred.
  • the multiple filter stages are each designed on the basis of different (interfacial) physical and/or colloidal chemical and/or chromatographic separation principles, such as absorption and ion exchange mechanisms. This increases the spectrum or broad coverage of substances or particles that can be filtered out, especially toxins, as well as combinations of these.
  • a tailor-made filter stage composition can be made or provided for individual types of raw water (e.g. calcareous, chlorinated, etc. city water, rainwater, water available in the wild, etc.).
  • an electroadsorption filter can be an (alternatively or cumulatively) preferred embodiment for an (interfacial) physical separation principle or for the at least one mechanical filter stage.
  • the electroadsorption filter includes an electroactive filter material. This is the electroactive filter material strongly positively charged and thereby set up to bind negatively charged particles, such as bacteria and protozoa, and remove them from the (raw) water to be purified/filtered. Since most pathogens in water are negatively charged due to their cell wall structure, there are (additive) advantages for the electroadsorption filter in terms of the effective separation of pathogenic germs.
  • the filtration unit can have at least a first mechanical filter stage.
  • the (optional) at least one first mechanical filter stage is designed as a sediment pre-filter set up for the mechanical separation of sediment particles from the raw water.
  • the sediment pre-filter can be designed in the form of a fleece bed, fiber bed and/or bulk bed.
  • the (or the) sediment pre-filter serves in particular to filter out visible and/or suspended (thermodynamically) suspended solids, which are present in particular in the order of (tenths of) a millimeter.
  • the sediment pre-filter can have a separation cut at approximately 5 micrometers, preferably at approximately 2 micrometers, in particular at approximately 1 micrometer, or can achieve this in terms of filtration technology. This serves to increase technical requirements such as filter performance / degree of separation and service life, in particular the reverse osmosis unit, which is thus protected from blocking.
  • the filtration unit can have at least a second mechanical filter stage.
  • the (optional) at least one second mechanical filter stage is connected downstream of the first mechanical filter stage or is arranged downstream along the flow direction.
  • the at least one second mechanical filter stage can be granular or as a granulate/particle agglomerate and/or block-shaped or as a block filter.
  • the at least one second mechanical filter stage can be designed as a carbon depth filter or activated carbon depth filter.
  • the term (activated carbon) block filter refers to a (activated carbon) filter particle composition that is compressed by means of a binder, in particular press-compacted.
  • the performance level of the activated carbon filter is approximately 80% filtering of dispersed solid particles.
  • the carbon depth filter or activated carbon depth filter is used in particular to filter out microbiological substances or living substances, especially bacteria and viruses, which are present in particular in the order of micrometers. Olfactory components such as unpleasant-smelling hydrophobic substances or traces can also be effectively separated in this way.
  • What is particularly advantageous about activated carbon is its health-neutral, ie physiologically harmless or even positive, well-tolerated material properties.
  • the second mechanical filter stage can rest on the first mechanical filter stage; That is, a flow exit surface of the first mechanical filter stage is in direct contact with a flow inlet surface of the second mechanical filter stage.
  • respective pairs of two adjacent or subsequent filter stages can, optionally preferably, be arranged at a distance or adjacently.
  • the filtration unit can be designed in multiple layers to include the multiple filter stages. This results in manufacturing advantages.
  • the first filter stage can be designed as the sediment pre-filter (preferably with a separation cut of approximately 5 micrometers, in particular at approximately 1 micrometer) and the second filter stage as the activated carbon depth filter, in particular as the activated carbon block filter .
  • the activated carbon can optionally be of natural origin. For example, activated carbon baked from coconut shells has a much larger internal pore surface and number of active centers compared to standard activated carbon. This achieves an approximately 25% increase in yield or filter performance/degree of separation, which leads to a further improvement in water purification.
  • the filtration unit and/or the at least one first mechanical filter stage and/or the at least one first mechanical filter stage and/or the reverse osmosis unit, respectively or in combined stages can be comprised of a cage (grid) and/or a perforated (e.g. stretched, laser-perforated, etc.) or permeable holding film, (e.g. woven, knitted, etc.) layer, etc., at least partially, surrounded or bordered on the outside.
  • the outer cage, etc. can be made of a thermoplastic.
  • the outer cage, etc. may serve to hold together said fleece bed, fiber bed or bulk bed. This serves to increase dimensional stability both during the production assembly of the multi-stage filter cartridge and in the flow-through filtration operation.
  • a preferred embodiment of a (substantially) cylindrical, in particular concentric, arrangement can be present in the multistage filter cartridge.
  • The, in particular inner, reverse osmosis unit and the, in particular outer, filtration unit preferably form the cylindrical, in particular concentric, arrangement in a common outer, (essentially) cylindrical Capsule body of the housing capsule.
  • a cylindrical reverse osmosis outer peripheral surface of the inner reverse osmosis unit and a cylindrical filtration inner peripheral surface of the outer filtration unit spaced apart from one another can form the filtrate lumen in the filtrate line section.
  • This design feature serves to decouple the process engineering or balance between the filtration unit and the reverse osmosis unit, i.e. the process engineering degrees of freedom are increased. Furthermore, there are manufacturing advantages with regard to the assembly of the filtration unit and the reverse osmosis unit.
  • the filtrate line section can be deflected in a section following the filtrate lumen in the direction of flow (in such a way) in order to flow into a reverse osmosis inlet end face opposite the capsule connection unit the inner reverse osmosis unit.
  • the deflection can involve a U-turn (i.e. around 180 degrees). This also serves to decouple the process engineering and balance of the filtration unit on the one hand and the reverse osmosis unit on the other.
  • the flow to the reverse osmosis inlet face is optimized by the filtrate stream of water.
  • a cylindrical reverse osmosis inner peripheral surface of the inner reverse osmosis unit may form a central permeate tube.
  • the permeate tube can have an initial flow direction To form a section of the permeate line section. This transition avoids unnecessary interfaces and enables a particularly compact arrangement/design.
  • a retentate-side reverse osmosis outlet end face of the inner reverse osmosis unit which is opposite the reverse osmosis inlet end face, opens into the retentate line section.
  • a cylindrical filtration outer peripheral surface of the outer filtration unit and a cylindrical capsule body inner peripheral surface of the capsule body, spaced apart from one another can form an annular gap-shaped section of the raw water pipe section which is the last in the flow direction.
  • the last section of the raw water pipe section can be set up to form a tangential flow (i.e. so-called cross-flow / cross-current) during operation along the cylindrical filtration outer peripheral surface, i.e. in a longitudinal direction (or parallel to a cylindrical axial axis).
  • a cross-flow driving style the negative effect of a possible build-up of a so-called filter cake is advantageously minimized, so that the efficiency of the filtration is optimized. This particularly improves the service life of the filtration unit.
  • the capsule connection unit can be set up as or with a quick-change fitting, such as a threaded closure, a bayonet closure or the like.
  • a quick-change fitting such as a threaded closure, a bayonet closure or the like.
  • the housing capsule in particular the capsule body, can consist essentially of a plastic, in particular thermoplastic and/or antibacterial or antibiotic-finished.
  • a plastic in particular thermoplastic and/or antibacterial or antibiotic-finished.
  • a (nano) silver finish especially coating and/or compounding, can be provided for this purpose.
  • the plastic especially thermoplastic, can be free of plasticizers and/or organic solvents and similar additives that are harmful to health. This advantageously avoids undesirable recontamination of the water.
  • the multi-stage filter cartridge can be (re)packaged, in particular piece by piece, in a sterile outer packaging.
  • germination is advantageously counteracted before use. This protects in particular against the risk of the development of resistant bacterial strains during a storage period before the actual use by the consumer.
  • the compact design of at least two or more water purification units/components combined in a housing capsule that is to be repackaged makes it easier for the manufacturer to repackage it into a sterile product.
  • a drinking water supply device for continuously and/or semi-continuously operable drinking water treatment in households, restaurants or the like, which has the multi-stage filter cartridge according to the first aspect of the present disclosure, is proposed.
  • the drinking water supply device also has a device connection unit, a feed pump, a storage container or drinking water tank and a drinking water dispensing unit such as a fitting, a tap, etc.
  • the device connection unit is designed and set up to fit the capsule connection unit of the housing capsule.
  • the device connection unit can have a first device connection, a second device connection and/or a third device connection.
  • the first device connection is preferably set up to fit the raw water input connection for introducing water to the filtration unit.
  • the second device connection is preferably set up to fit the permeate output connection for water discharge from the reverse osmosis unit on the permeate side.
  • the third device connection is preferably set up to fit the retentate output connection for water discharge from the reverse osmosis unit on the retentate side.
  • the feed pump is designed to build up a feed pressure required for or in the reverse osmosis unit above the natural osmosis pressure (for drinking water at approx. 2 bar), in particular between 3 and 30 bar, to activate the reverse osmosis unit and furnished.
  • a design serves to ensure the constant, trouble-free reliability of the (especially automatic) water purification operation, which not least meets the needs of non-technical consumers.
  • the drinking water supply device or the multi-stage filter cartridge, in particular the reverse osmosis unit can be used for a water supply of raw water / city water / tap water from the pipe network at a delivery pressure or flow pressure of approx. 4 to 8 bar, be designed or set up in particular for an input flow or filtrate flow of up to approx. 20 liters per hour or approx. 127 GPD (gallons per day).
  • the storage container for providing purified drinking water on the permeate side is fluidly connected or can be fluidly connected via a line piece to the second device connection.
  • the drinking water supply device with the multi-stage filter cartridge according to the disclosure.
  • the latter only enables a particularly small design of the drinking water supply device.
  • the desired compact design of the drinking water supply device would not even be possible (or not while meaningfully maintaining a water purification performance that is appropriately high for typical consumer/household needs).
  • the drinking water supply device can be 'built around' the compact multi-stage filter cartridge in the smallest of spaces.
  • this enables innovative 'slim' technical designs of the drinking water supply device without compromising its main technical function, namely that of water purification.
  • the presently disclosed multi-stage filter cartridge is designed or set up for use in the continuously and/or semi-continuously operable drinking water supply device, this means that the latter essentially or mainly cannot be operated in batches or per a single batch is or is to be operated.
  • the term “continuous and/or semi-continuous” refers to the The fact that water is literally purified as it flows out of the tap for a consumer. It is irrelevant to the functioning of the multi-stage filter cartridge or drinking water supply device according to the disclosure if the continuous operation can or is temporarily interrupted or switched off or suspended. In this respect, this is also expressed by the term “semi-continuous”.
  • the multi-stage filter cartridge is designed for start-up effects, for example with regard to (flow) pressure, in particular spontaneous pressure increases, and is designed to be sufficiently dimensionally stable, in particular with regard to the filtration unit as well as the reverse osmosis unit.
  • the drinking water supply device preferably has a feed line connection for feeding in raw/city water, in particular set up for a house connection or a drinking water supply line, for example for a respective residential party.
  • the feed line connection particularly in the case of mobile drinking water supply devices, such as in the case of mobile canteens or small kitchens, preferably on board a camping car, an aircraft and / or a ship, can also provide a fluid connection to a larger storage tank Make water.
  • water-carrying components of the drinking water supply device can be made of and/or in contact with surfaces (exclusively) made of stainless steel.
  • surfaces exclusively made of stainless steel.
  • This advantageously avoids any new contamination, in particular from plastic abrasion and/or fouling, in particular from biological micro-fouling caused by bacterial colonization and/or algae colonization.
  • a different consideration of technical benefits may have to be made from the point of view of a consumable/replaceable part.
  • At least one sealing material such as an O-ring, preferably all sealing materials, insofar as they are in contact with water, can consist of a material that is inert to water, in particular long-term inert and/or non-water-swelling. This improves the sealing function and the service life of the seal(s).
  • the drinking water supply device in particular the line section, and/or the multi-stage filter cartridge, in particular the permeate line section, can have an after-filter connected downstream of the reverse osmosis unit. This can advantageously serve for further, especially taste-related, neutralization or drinking water treatment. In particular, any specific olfactory traces that may still be noticeable via a consumer's highly sensitive sense of smell can be completely eliminated in this way. This means that the drinking water is particularly reliably perceived as fresh.
  • the drinking water provision device can have an operating control device with an (interactive) human-machine interface, in particular with menu navigation, etc. This advantageously serves to ensure convenient operation by a user or the consumer and to make water purification transparent to them.
  • the drinking water supply device can have a drinking water purity control device with a control unit and at least one determining means, such as a conductivity sensor, designed to determine an aqueous concentration of dissolved solids.
  • the drinking water supply device can have the drinking water purity control device according to the present applicant's German patent application DE 102020 128968, which is discussed in the introductory part and is expressly incorporated into the present disclosure by reference.
  • the drinking water purity control device has a means downstream of the second device connection for the permeate stream of water discharged from the reverse osmosis unit to flow through, in particular the line section, which has a first determination means, in particular a first conductivity sensor, set up to determine a first aqueous concentration of dissolved solids .
  • the control unit is set up to: check whether a predetermined, in particular constant, first target value for the first aqueous concentration of dissolved solids in the permeate stream of water is reached, in particular undershot, and in the corresponding negative case, which is exceeded the first target value is based on the checked first aqueous concentration of dissolved solids to discard the permeate stream of water.
  • the control unit can in particular be set up to reject the permeate stream of water from the drinking water supply device.
  • a drinking water supply device in particular as a household appliance, which not only completely cleans the (drinking) water, but the purified water is automatically checked again for its quality or a suitable or desired, ie predetermined, degree of purity after the sequentially switched cleaning stages or filtering processes.
  • the control determines that the level of purity falls below or is maintained at the predetermined level, the permeate stream of water is released to a consumer.
  • This has the advantage that the consumer only receives verified, in particular trace-free, pure drinking water from the drinking water supply device disclosed therein. Furthermore, this is done conveniently and almost as if straight from the tap.
  • the drinking water supply device can have a means for cooling, in particular the storage container.
  • the drinking water supply device can have a carbonization unit for carbonization on the permeate side. This serves to further tailor the product to the consumer's individual wishes.
  • the drinking water supply device can be designed as a small table-top system, in particular as a household table-top device and/or with maximum dimensions of 400 mm in height and/or 500 mm in width and/or 340 mm in depth, without an under-table system unit set up for water purification .
  • a standard niche size for fitted kitchens of 60 cm / 60 cm can be used in this way.
  • a mobile variant for example for outdoor use, medical use, etc., may be conceivable.
  • the expert understands that any city water piping, connection installation, electrical cable laying, etc. do not fall under the term under-table system unit set up for water purification.
  • Such a design enables an expanded range of applications due to its small space requirement and multiple storage options in (mini) kitchens, behind counters, etc.
  • it is advantageous that such a preferred embodiment fits easily into almost any spatial situation / for a variety of structural conditions (living space, work space, etc.).
  • this eliminates the need for under-table installation, which many consumers find technically (too) complex.
  • the disclosure particularly supports the technical goal of providing more and more consumers and households with reliably purified drinking water, so to speak 'directly from your own line'.
  • a serious benefit of the present disclosure is a contribution to better achieving climate protection goals through a corresponding reduction in transport logistics for (deposit) bottled mineral water.
  • the disclosure is aimed at a need for the segment of small systems within the meaning of the above-mentioned German Drinking Water Ordinance, according to which even large-scale water supply systems in single- and two-family houses do not count as large-scale systems for heating drinking water, Section 3 Number 12.
  • German Drinking Water Ordinance according to which even large-scale water supply systems in single- and two-family houses do not count as large-scale systems for heating drinking water, Section 3 Number 12.
  • the person skilled in the art understands without further ado, that many different areas of application of the disclosed multi-stage filter cartridge and consequently also a wide variety of sizes/dimensions for these are conceivable within the scope of the subject matter disclosed here.
  • FIG. 1 shows a system diagram of a drinking water supply device according to the prior art with sequentially flowed through separate water purification units in the form of a filtration exchange cartridge and a reverse osmosis exchange cartridge;
  • FIG. 2 shows a cross section of an encapsulated multi-stage filter cartridge according to an exemplary embodiment according to the present disclosure, which is set up for a continuously and/or semi-continuously operable drinking water supply device for water treatment by means of a reverse osmosis filter stage;
  • FIG. 3 shows a perspective view of a half section of the encapsulated multi-stage filter cartridge from FIG. 2 (rotated by 180° relative to it) according to the exemplary embodiment according to the present disclosure
  • Fig. 4 is a slightly perspective side view (with a partial cross-section in some areas) of an associated drinking water supply device (according to a Embodiment of the drinking water provision device according to the disclosure) with the encapsulated multi-stage filter cartridge according to the embodiment according to the present disclosure.
  • FIG. 1 schematically representing a prior art. This results in further details, features and advantages of the disclosure. Identical or functionally equivalent features are provided with the same reference numbers in the individual figures.
  • Fig. 1 shows a system diagram of a water treatment system 200' as a drinking water supply device according to the prior art.
  • This includes sequentially flowed separate water purification units, which are in the form of (at least) a (conventional) separately replaceable filtration cartridge T (or a plurality of such to represent several filter stages) as a (conventional) reverse osmosis unit R0 'and a (conventional) downstream arranged separately replaceable reverse osmosis replacement cartridge 2 'are shown as a (conventional) mechanical filtration unit F'.
  • a (conventional) separately replaceable filtration cartridge T or a plurality of such to represent several filter stages
  • a (conventional) reverse osmosis unit R0 ' and a (conventional) downstream arranged separately replaceable reverse osmosis replacement cartridge 2 'are shown as a (conventional) mechanical filtration unit F'.
  • an externally provided input stream (raw/city) water V-1 becomes a filtr
  • the filtrate stream water V-F then enters the reverse osmosis exchange cartridge 2' to pass through it, so that a permeate stream water V-P cleaned of the finest particles/fine impurities can be taken as a useful stream of drinking water (as a partial stream) (continuously). Furthermore, a retentate stream of water V-R (as another / remaining partial stream) emerges from the reverse osmosis exchange cartridge 2 ', which is concentrated around the separated fine particles / finest impurities.
  • the retentate stream (waste) water V-R drains off via a drain throttle 3', which serves to relax the reverse osmosis pressure applied to the reverse osmosis replacement cartridge 2' during operation, for example at 3 bar, to ambient pressure at approximately 1 bar.
  • FIG. 2 and 3 is an encapsulated multi-stage filter cartridge 100 according to an exemplary embodiment according to the present disclosure, which is used for a continuously and/or semi-continuously operable drinking water supply device (see FIG. 4) for water treatment by means of a Reverse osmosis filter stage is set up.
  • 2 shows a cross section of the encapsulated multi-stage filter cartridge 100
  • FIG. 3 shows a perspective view of a half-section of the encapsulated multi-stage filter cartridge 100. Only in FIG Flow directions occurring during water purification operation, shown by small arrows.
  • the claimed object of the encapsulated multi-stage filter cartridge 100 is also aimed in particular at a non-installed / dry state in the sense of a consumable.
  • the encapsulated multi-stage filter cartridge 100 has a reverse osmosis unit RO and a filtration unit F.
  • the multi-stage filter cartridge 100 has a housing capsule 50.
  • the reverse osmosis unit RO and the filtration unit F are encapsulated together by the housing capsule 50.
  • both the reverse osmosis unit RO and the filtration unit F are arranged in the common housing capsule 50 or are encapsulated (entirely/integrally) by it.
  • the housing capsule 50 has a capsule body 52, on which an outer capsule connection unit 51 (in particular for connection to the drinking water supply device) is arranged.
  • the capsule body 52 especially on a side opposite the capsule connection unit 51, can be designed or closed with a capsule lid 53. This serves to easily introduce the reverse osmosis unit RO and the filtration unit F into the housing capsule 50.
  • the filtration unit F is connected upstream of the reverse osmosis unit RO.
  • the filtration unit F and the reverse osmosis unit RO downstream of it can be flowed through one after the other along a flow direction of a (volume) stream of water to be purified.
  • a filtrate line section L-F establishes a fluid connection from the filtration unit F to the reverse osmosis unit RO.
  • a filtrate stream of water V-F pre-filtered from coarse particles can flow from the filtration unit F and enter the reverse osmosis unit RO.
  • the filtration unit F here has a first mechanical filter stage F1 and a second mechanical filter stage F2 (and possibly a third, fourth, etc.):
  • the first filter stage F1 can be designed as a sediment pre-filter, for example like a sieve .
  • the first filter stage F1 is used to pre-filter sediments such as small suspended particles and/or of microparticles from the input stream water V-1; and/or the removal of a large proportion of biological contaminants such as bacteria and viruses.
  • the first filter stage F1 can, for example, filter up to a particle size of approximately 5 micrometers (5 pm) as a separating cut.
  • the sediment filter captures rust, sand and/or other coarse particles, thereby protecting the second filter stage F2.
  • the second filter stage F2 can preferably be designed as an activated carbon (block) filter.
  • the second filter stage F2, preferably the activated carbon (block) filter is set up downstream or downstream of smaller particles such as an asbestos fiber or dissolved solids such as chlorine and / or a pesticide and / or a part of a drug residue and / or a part to remove microplastics.
  • An ozone filter can also be used cumulatively or alternatively.
  • the reverse osmosis unit RO and the filtration unit F are arranged at a distance from one another, whereby they form a filtrate lumen 45 in the filtrate line section LF.
  • the capsule connection unit 51 serves, as will be further clarified later with reference to FIG. 4, for connection to a drinking water supply device 200 (FIG. 4).
  • the capsule connection unit 51 again with reference to Figures 1 and 2, has as external connections a raw water input connection 61 as well as a permeate output connection 62 and a retentate output connection 63.
  • the raw water input connection 61 which Permeate output port 62 and retentate output port 63 are (optionally) arranged in series in an axial direction; alternatively, the external connections can be offset from one another, in particular by angle segments around the axial axis A.
  • the permeate output connection 62 is (optionally) arranged behind the two other external connections, i.e. raw water input connection 61, retentate output connection 63, when viewed from the direction of the capsule body 52.
  • An externally provided input stream of (raw) water V-1 is introduced into the housing capsule 50 via the raw water input connection 61.
  • the input stream (raw) water V-1 flows via a raw water line section L-1 to a raw water inlet side of the filtration unit F or the first filter stage F1.
  • a permeate stream of (drinking) water VP emerges from it, which corresponds to the useful stream of purified drinking water, and, on the other hand, a retentate stream of (waste) water VR emerges as two (part) separated by activated reverse osmosis pressure. streams out.
  • the operation of the reverse osmosis unit can cause RO contamination larger than approximately 0.1 nanometers, such as heavy metals, uranium, hormones, harmful chemicals, and organic and inorganic compounds.
  • the permeate stream (drinking) water V-P is led out/drained from the housing capsule 50 by the reverse osmosis unit RO via the permeate output connection 62.
  • the permeate stream (drinking) water V-P flows via a permeate line section L-P from a permeate outlet side of the reverse osmosis unit RO to the permeate output connection 62.
  • a cylindrical reverse osmosis inner peripheral surface of the inner reverse osmosis unit RO forms a central permeate tube 32 as the permeate outlet side.
  • the permeate pipe 32 coincides with an initial section of the permeate line section L-P in the direction of flow.
  • a final section of the permeate line section L-P is (optionally) formed directly upstream of the permeate outlet connection 62 as a frontal calming zone in the form of a cylindrical disk section, which essentially corresponds to a diameter of the capsule connection unit.
  • a retentate stream (wastewater V-R) is discharged from the housing capsule 50 by the reverse osmosis unit RO via the retentate output connection 63.
  • the retentate stream (waste) water V-R flows via a retentate line section L-R a retentate outlet side of the reverse osmosis unit RO to the retentate outlet connection 63.
  • the (total) flow entering from the filtration unit F or via the filtrate line section L-F into the reverse osmosis unit RO during its operation i.e. the filtrate flow water V-F
  • the filtrate flow water V-F corresponds in balance to the sum of the two emerging from the reverse osmosis unit RO ( Partial flows, i.e. the sum of the permeate stream (drinking) water V-P (emerging from the reverse osmosis inner peripheral surface into the permeate tube 32), which corresponds to the useful stream of purified drinking water, and the retentate stream (waste) water V-R.
  • the (balance-wise complementary) retentate stream water V-R can, for example, be used for other purposes as unclean industrial water.
  • the raw water line section L-1, the permeate line section LP and the retentate line section LR are (optionally) connected to one another in the radial direction by means of respective first O-rings 58, which are centered around the axial axis A each written against each other.
  • first O-rings 58 which are centered around the axial axis A each written against each other.
  • this is initially centered around a center in the form of the inner cylindrical reverse osmosis unit RO (with the inner permeate tube 32).
  • Axial axis A of the multi-stage filter cartridge 100 is designed or designed structurally.
  • the reverse osmosis unit RO can be surrounded on one of its cylindrical reverse osmosis outer peripheral surface 31 by a permeable/porous holding film or a permeable (e.g. woven, knitted, etc.) layer, etc., from the outside or in the form of an outer cylindrical lateral surface be overturned.
  • a permeable/porous holding film or a permeable (e.g. woven, knitted, etc.) layer, etc. from the outside or in the form of an outer cylindrical lateral surface be overturned.
  • the reverse osmosis unit RO is (optionally) mounted on the housing capsule 50 in the axial axis A via the permeate tube 32.
  • the permeate tube 32 is mounted at the ends on two opposite (reverse osmosis) bearing sections 37 on the housing capsule 50.
  • An outer cylindrical layer in the form of the filtration unit F surrounds an inner cylindrical core in the form of the reverse osmosis unit RO.
  • the filtration unit F exemplarily contains two as the at least one/more filter stages F1, F2 in the form of cylindrical layers.
  • the first filter stage F1 forms the outer of the cylindrical layers and the second filter stage F2 forms the inner of the cylindrical layers.
  • the cylindrical arrangement is set up to effect (during operation) a (substantially, in the main direction) radial fluid passage through the filtration unit F from the outside to the inside.
  • the filtration unit F or the respective filter stages F1, F2 is/are formed here around the central axial axis A of the multi-stage filter cartridge 100, these are/are arranged concentrically to the reverse osmosis unit RO or to the permeate tube 32.
  • the permeate tube 32 passes about the axial axis A in a straight line into the adjoining further permeate line section LP.
  • the inner reverse osmosis unit RO and the outer filtration unit F are radially spaced from one another, which defines the filtrate lumen 45 in the shape of an annular gap.
  • the annular gap of the filtrate lumen 45 has a gap width which is between the cylindrical reverse osmosis outer peripheral surface 31 of the inner reverse osmosis unit RO and a cylindrical filtration inner peripheral surface 21 of the outer filtration unit F is formed in the filtrate line section LF.
  • the filtrate stream water V-F or the filtrate line section L-F is deflected by a U-turn (i.e. by 180 degrees) in a section that is downstream from the filtrate lumen 45.
  • the filtrate line section L-F opens into a reverse osmosis inlet end face 33 of the inner reverse osmosis unit RO, which is opposite the capsule connection unit 51.
  • the filtrate line section LF passes in the flow direction from the annular gap-shaped filtrate lumen 45 into a cylindrical disk-shaped prelumen centered around the axial axis A. This preliminary lumen is directly adjacent to the reverse osmosis inlet face 33.
  • a retentate-side reverse osmosis outlet end face 34 of the inner reverse osmosis unit RO which is opposite the reverse osmosis inlet end face 33, opens into the retentate line section L-R.
  • the retentate line section L-R runs in a first (retentate) semicircle segment around the axial axis A in a straight line from the reverse osmosis outlet end face 34 to an angle of 90 degrees into the retentate output connection 63.
  • a second (raw water) semicircle segment complementary to the first (retentate) semicircle segment forms an axial (in input) in the area of the capsule connection unit 51 -Flow direction essentially initial) section of the raw water pipe section L-1.
  • the permeate line section L-P is connected to the retentate line section L-R adjoining the reverse osmosis outlet end face 34 by means of a second (reverse osmosis) Unit ) O-ring 39 sealed.
  • a cylindrical filtration outer circumferential surface of the outer filtration unit F and a cylindrical capsule body inner circumferential surface of the capsule body 52 form an annular gap-shaped, last section of the raw water line section L-1 in the flow direction. This forms an annular gap-shaped filter entry zone lumen 15.
  • a cross-flow flow occurs in the annular gap-shaped filter entry zone lumen 15 (as indicated by the arrows) along the cylindrical filtration outer peripheral surface.
  • the housing capsule 50 has a cylindrical capsule body 52, which tapers (step-like) in the shoulder-shaped transition region to the capsule connection unit 51 as a neck section of the housing capsule.
  • the capsule connection unit 51 generally defines a portion of a connection fitting.
  • the essentially cylindrical capsule connection unit 51 (optionally) has a circumferential collar.
  • the multi-stage filter cartridge shown in Figures 2/3 and 4 can advantageously have the following dimensions (of the order of magnitude).
  • the internal components in particular can have the following dimensions
  • the drinking water supply device 200 shown as an example relates to a compact household appliance in a "slim" table-top design, i.e. on the order of, for example, a coffee machine, a water soda maker, a universal kitchen appliance, a microwave, etc.
  • a "slim" table-top design i.e. on the order of, for example, a coffee machine, a water soda maker, a universal kitchen appliance, a microwave, etc.
  • the drinking water supply device 200 carries out the drinking water purification according to the disclosure by connecting to a water supply of raw water / city water / tap water from the mains network, for example from a standard household tap (not shown).
  • the drinking water purity control device 200 is optionally equipped with a drinking water purity control device 300 to control and/or regulate the drinking water purification.
  • the drinking water supply device 200 has a device connection unit 210, a feed pump (not shown), a drinking water tank 230 as a storage container and a faucet 280 as a drinking water dispensing unit.
  • a consumer can, for example, place a drinking water glass under the tap 280 in order to enjoy drinking water that has been purified according to the disclosure.
  • the device connection unit 210 is suitable, i.e. as a counterpart and in terms of positioning(s), on the capsule connection unit 51 of the housing capsule 50 [cf. Fig. 2/3.] trained and set up.
  • the device connection unit 210 has a first, second and third device connection.
  • the first device connection fits onto the raw water inlet connection [with reference number 61; the capsule connection unit 51 of the housing capsule 50; see Fig. 2/3.].
  • the second device connection fits onto the permeate outlet connection [with reference number 62; the capsule connection unit 51 of the housing capsule 50; see Fig. 2/3.].
  • the third device connection fits onto the retentate output connection [with reference number 63; the capsule connection unit 51 of the housing capsule 50; see Fig. 2/3.].
  • the multi-stage filter cartridge 100 (optional) can be inserted into the drinking water supply device 200 with the (single) capsule connection unit facing upwards (i.e. when filled with water, in a direction directed against the gravity-induced flow direction of the water). This serves to prevent water from leaking when changing/exchanging the multi-stage filter cartridge 100 or, ideally, to prevent the water level within the housing capsule 50, in particular up to (quasi, in particular up to 5 mm) below the raw water inlet connection or the permeate output connection or retentate output connection without loss of water.
  • the storage container 230 receives permeate-side, ie purified, drinking water via a line piece 220 via the second device connection from the encapsulated multi-stage filter cartridge 100, more precisely via the permeate outlet connection [with reference number 62; the capsule connection unit 51 of the housing capsule 50; see Fig. 2/3.].
  • Reference symbol list

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  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La divulgation concerne une cartouche filtrante à étages multiples encapsulée (100) pour un dispositif de préparation d'eau potable, qui peut être actionnée de façon continue et/ou semi-continue, pour le traitement de l'eau dans les domaines domestiques, gastronomiques, ou analogues. La cartouche filtrante à étages multiples (100) comporte une unité d'osmose inverse (RO) et une unité de filtration (F) avec au moins un étage de filtration mécanique (F1, F2, ....). L'unité de filtration (F) est en communication fluidique avec l'unité d'osmose inverse (RO) en amont de celle-ci par l'intermédiaire d'une partie de conduite de filtrat (L-F). L'unité d'osmose inverse (RO) et l'unité de filtration (F) sont entourées par une capsule de boîtier (50), en particulier unique, de façon à être encapsulées conjointement, en particulier encapsulées de façon stérile. Une unité de raccordement de capsule (51) de la capsule de boîtier (50) présente, en tant que raccords externes, un raccord d'entrée d'eau non traitée (61) pour introduire de l'eau dans l'unité de filtration (F) et également un raccord de sortie de perméat (62) et un raccord de sortie de rétentat (63) pour évacuer l'eau de l'unité d'osmose inverse (RO). Est également divulgué un dispositif de préparation d'eau potable associé comprenant la cartouche filtrante à étages multiples encapsulée (100) selon la divulgation.
PCT/EP2023/060734 2022-05-02 2023-04-25 Cartouche filtrante à étages multiples encapsulée pour un dispositif de préparation d'eau potable, et dispositif de préparation d'eau potable associé WO2023213606A1 (fr)

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DE102022110697.7 2022-05-02
DE102022110697.7A DE102022110697A1 (de) 2022-05-02 2022-05-02 Gekapselte Multistufen-Filterpatrone für Trinkwasserbereitstellungs-Vorrichtung und zugehörige Trinkwasserbereitstellungs-Vorrichtung

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761295A (en) * 1986-05-27 1988-08-02 Williams Wholesalers, Inc. Technique for using reverse osmosis unit
EP0529921A1 (fr) 1991-08-23 1993-03-03 Desalination Systems Inc. Cartouche à membrane semi-perméable et procédé pour sa fabrication
US20060065601A1 (en) 2004-09-24 2006-03-30 Baird Michael T Water purification system utilizing a carbon block pre-filter
US20160175746A1 (en) * 2014-12-19 2016-06-23 Guangdong Midea Water Dispenser Mfg. Co., Ltd. Integrated composite filter and water purification system having the same
US20180111091A1 (en) * 2015-12-30 2018-04-26 Zhongshan Filterpro Environmental Protection Technology, Llc Filter cartridge with independently replaceable filter assembly
US10399021B2 (en) * 2014-12-19 2019-09-03 Guangdong Midea Water Dispenser Mfg. Co., Ltd. Water purification system
DE102020128968A1 (de) 2020-11-03 2022-05-05 INVI WATER GmbH Verfahren zur Steuerung der Trinkwasserreinheit während einer Trinkwasseraufbereitung und Trinkwasserreinheit-Steuerungsvorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761295A (en) * 1986-05-27 1988-08-02 Williams Wholesalers, Inc. Technique for using reverse osmosis unit
EP0529921A1 (fr) 1991-08-23 1993-03-03 Desalination Systems Inc. Cartouche à membrane semi-perméable et procédé pour sa fabrication
US20060065601A1 (en) 2004-09-24 2006-03-30 Baird Michael T Water purification system utilizing a carbon block pre-filter
US20160175746A1 (en) * 2014-12-19 2016-06-23 Guangdong Midea Water Dispenser Mfg. Co., Ltd. Integrated composite filter and water purification system having the same
US10399021B2 (en) * 2014-12-19 2019-09-03 Guangdong Midea Water Dispenser Mfg. Co., Ltd. Water purification system
US20180111091A1 (en) * 2015-12-30 2018-04-26 Zhongshan Filterpro Environmental Protection Technology, Llc Filter cartridge with independently replaceable filter assembly
DE102020128968A1 (de) 2020-11-03 2022-05-05 INVI WATER GmbH Verfahren zur Steuerung der Trinkwasserreinheit während einer Trinkwasseraufbereitung und Trinkwasserreinheit-Steuerungsvorrichtung

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