Classifications

• • 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
  • C02F2201/00—Apparatus for treatment of water, waste water or sewage
  • C02F2201/002—Construction details of the apparatus
• • 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
  • C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug

Definitions

• the invention relates to a device for filtering liquids according to the preamble of claim 1.
• the invention also relates to a filter cartridge for such a device.
• Filter cartridges are understood to be those that have a sieve-like structure for mechanical filtration.
• filter cartridges are understood to mean those which, in addition to a sieve-like structure, have at least one filter medium, e.g. B. in granular form, which is used for chemical and / or mechanical removal and / or reduction of organic and / or inorganic contaminants.
• Filter cartridges equipped in this way thus enable non-mechanical filtration, which can be combined with mechanical filtration.
• These filter cartridges are used to optimize water, whereby optimization means mechanical and / or non-mechanical filtration. This includes e.g. B. the softening and descaling of drinking water.
• filter devices with spherical filter cartridges which are screwed onto the inlet funnel from below by means of a bayonet catch, as is described in WO 2004/014519 A2.
• a device for treating liquids with an inlet funnel which has a receiving opening with a sealing ring.
• the filter cartridge is also inserted into the opening from below and pressed into the opening by means of a separate fastening ring.
• the filter cartridge is provided below the sealing edge on the upper part of the cartridge with a groove into which the fastening ring engages with its lower section.
• the upper section of the fastening ring is guided in a groove of a connecting piece formed on the funnel bottom.
• the inlet funnel has a receiving opening in its bottom wall, into which the filter cartridge is inserted from above.
• the filter cartridge usually has a conical sealing edge that lies against the edge of the receiving opening. When inserting the filter cartridge can tilt so that the intended sealing position is not taken.
• a filter cartridge and a device for the treatment of liquids are known, in which the sealing edge has additional latching means which interact with corresponding latching means in the region of the opening of the bottom of the inlet funnel.
• the locking means are brought into engagement with one another by a rotary movement.
• the filter cartridge is only held at the edge and is located in the filtrate space. If it is a kettle, the filter cartridge is also in the cooking area, so that the filter cartridge may be impaired while the filtered liquid is being heated. It is therefore it is desirable that the filter cartridge is shielded from the filtrate or cooking space.
• inlet funnels with a receiving chamber for the filter cartridge are used.
• the conical sealing edge of the filter cartridge lies against the edge of the opening in the bottom wall of the inlet funnel.
• the circumferential and bottom walls of the filter cartridge are arranged at a distance from the circumferential and bottom walls of the receiving chamber, so that filtered liquid can collect in this space during the filtration, but the flow rate is not limited thereby.
• An outlet opening which is provided with a closure element, is located in the bottom wall of the receiving chamber.
• Such a water filter device with a collecting can and with a heating element is known from DE 198 46 583 A1.
• the inlet funnel has a receiving chamber into which the filter cartridge is inserted from above.
• the receiving chamber is formed by a filter insert which can be firmly connected to the inlet funnel or can be inserted into the receiving opening.
• the filter insert is adapted to the conical shape of the filter cartridge and forms a guide element for the filter cartridge. Since the circumferential wall of the filter cartridge is in full contact with the filter insert, it is difficult to separate the two components from one another, particularly if the user presses the filter cartridge too deeply into the filter insert.
• a drinking bottle with a built-in filter cartridge is known from WO 01/09040 A1.
• the bottle there is a cylindrical insert in the upper section, in the bottom wall of which a seat for the filter cartridge is formed.
• the bottom wall has a circular opening with a conical sealing edge opening downwards, into which the cartridge with its corresponding sealing edge must be inserted from below.
• the filter cartridge is held by a cup-shaped element which is attached to the bottom of the bottle and into which the bottom of the filter cartridge engages. The filter cartridge is thus held securely in every position of the bottle, but the replacement of the filter cartridge requires the insert to be removed.
• US 4,626,350 describes a filter system which is connected to a water pipe via two connections.
• the filter system consists of an upper and lower part of the housing, which are screwed together after the filter cartridge has been inserted.
• the lid and bottom wall of the filter cartridge have cup-shaped indentations into which correspondingly shaped connecting pieces of the housing parts engage for the supply and discharge of the unfiltrate or filtrate.
• both housing parts must be unscrewed.
• the object of the invention is to provide a device for filtering liquids and an associated filter cartridge, which has a defined sealing position in the inlet funnel with simple assembly.
• sealing edge is a snap edge, which is connected via a film hinge to one of the two cartridge parts, the snap edge from a first lower snap position to an upper second snap position and - 0 -
• the funnel bottom wall has a sealing seat surrounding the receiving opening, into which the snap edge snaps in its second position.
• the filter cartridge with the snap rim in the lower snap position is inserted into the opening from above and pressed down until the snap rim folds up and snaps into the sealing seat.
• the sealing seat is adapted to the snap edge in such a way that when the snap edge is snapped in, the filter cartridge lies sealingly against the edge of the receiving opening and is fixed.
• the snap-in signals to the user that the filter cartridge has assumed its predetermined sealing position.
• the snap edge is preferably formed by a flat edge strip extending outward in the radial direction.
• the snap edge is preferably connected to one of the two fastening flanges via the film hinge.
• the sealing seat on the inlet funnel is adapted to this snap edge.
• the sealing seat preferably merges into a conically projecting edge section with an inwardly open abutment section, on which the outer edge of the snap edge engages.
• the abutment section can be a groove or a step with at least one inclined surface.
• the inlet funnel preferably has at least one first fixing means below the receiving opening and the filter cartridge below and at a distance from the sealing edge has at least one second fixing means which cooperates with the first fixing means when the filter cartridge is inserted into the receiving opening.
• the filter cartridge can preferably be inserted into the receiving opening in the axial direction.
• the fixing means are arranged in such a way that when they interact, they additionally contribute to defining the sealing position of the filter cartridge, i. H.
• the fixing means work together, the sealing edge of the filter cartridge is guided into its intended position and finally lies against the edge of the receiving opening.
• the interaction of the fixing means is associated with a resistance which is also perceptible to the user when the filter cartridge is inserted and which signals to him that the intended position of the filter cartridge has been reached.
• the fixing means help to define the sealing position of the filter cartridge, it is advantageous if the distance between the sealing edge and the fixing means is chosen to be as large as possible. On This prevents canting or incorrect positioning of the filter cartridge.
• the second fixing means are therefore preferably arranged on the lower half, preferably in the lower third of the filter cartridge, in particular in the region of the bottom wall of the filter cartridge.
• the first and / or the second fixing means can be spacing and / or guiding and / or locking elements. This means that one fixing means can perform one or more functions and that several fixing means with different configurations can also be implemented in one device.
• the fixing means are preferably projections or depressions.
• the projections or depressions can be cylindrical, conical or frustoconical. This also includes, for example, indentations and protuberances or beads.
• locking cams In the case of locking elements, locking cams, locking recesses or ring beads are preferred.
• the fixing means can be spacer elements.
• at least one outward-pointing projection can preferably be formed on the bottom wall of the filter cartridge and, when the filter cartridge is inserted, sits on a holding element which is arranged on the inlet funnel and forms the first fixing means.
• the first fixing means can, for example, also be the bottom wall of a receiving chamber arranged on the inlet funnel.
• the holding element for example, which can form the bottom wall of the receiving chamber, can also have at least one inward-pointing projection which interacts with the bottom wall of the filter cartridge, which in this case forms the second fixing means.
• the fixing means can also be guide elements, which means that the filter cartridge is guided into its intended position when it is inserted.
• protrusions and depressions are suitable, in particular indentations on the filter cartridge and on the holding element, which can be designed, for example, in a cylindrical, truncated or truncated cone shape.
• the fixing means can also be latching elements which engage in one another when they interact.
• the snap-in or snap-in is usually associated with a sound which signals to the user that the filter cartridge has reached its intended position.
• the fixing means are preferably matched to one another in such a way that the plugging in of the filter cartridge in the axial direction is sufficient to bring the fixing means together. Rotating, tilting or other movements of the filter cartridge are therefore no more necessary than additional components such as fastening rings or the like, which makes the insertion of the filter cartridge overall user-friendly.
• the fixing means are coordinated with one another in such a way that they can be detached from one another without great effort when the filter cartridge is replaced.
• the fixing means are designed as locking elements, the locking or clamping forces are kept so low that the filter cartridge can be removed from the opening by simply pulling it out in the axial direction.
• the locking elements are therefore preferably designed such that an axial movement of the filter cartridge is sufficient to insert or remove it.
• the first fixing means is preferably arranged on a holding element arranged on the underside of the funnel bottom wall.
• a holding element can be designed in various ways.
• a holding element in the form of a holding bracket which spans the receiving opening is preferred.
• the holding element can be a receiving chamber which is arranged in the funnel bottom wall and has at least one outlet opening and has a bottom wall and a peripheral wall.
• the bottom wall of the receiving chamber preferably has at least one first indentation and the bottom wall of the filter cartridge has at least one second indentation that overlaps the first indentation.
• These two indentations can interact smoothly and thus form guide elements.
• these indentations can also be provided with latching elements which interlock when the filter cartridge is inserted.
• the first indentation is an inwardly pointing cylindrical or frustoconical hollow body molded onto the bottom wall of the receiving chamber, at least one of which is on the free edge Inward-facing circular arc-shaped, at least one outlet opening, the first bead is arranged, wherein an outwardly facing mandrel is arranged in the second indentation, which engages in the cylindrical or frustoconical hollow body when the filter cartridge is inserted.
• the first guide element is formed by the at least one circular bead which slides along the outside of the dome when the filter cartridge is inserted.
• the bead does not extend over the entire inner circumference of the hollow body, so that a free space remains, which forms the outlet opening after the dome, which is the second guide element, is inserted.
• a plurality of circular-arc-shaped beads or bead segments can be arranged at a distance from one another in the circumferential direction, so that a plurality of outlet openings are created.
• the mandrel has on its outside at least one circular second bead which engages behind the first bead when the filter cartridge is inserted.
• the first and second beads form locking elements.
• the hollow body and the mandrel are preferably arranged centrally. This arrangement has the advantage that only one fixing means is required in each case and the space required for the fixing means can thereby be kept small and thus more volume is available for the filter medium.
• the receiving chamber preferably has the first indentation in the region of the bottom and peripheral wall and the filter cartridge also has the second indentation in the bottom and peripheral wall.
• the first and the second indentation can preferably be cuboidal, so that both indentations each have two side walls, an end wall and a top wall. Both indentations can be designed as guide elements which engage or slide into one another.
• first indentation on two side walls has first latching means and the second indentation on two side walls has second latching means.
• This version has the advantage that larger latching forces can be realized, for. B. in devices in which water is heated.
• the two indentations can have different dimensions, which has the advantage that there is only one possibility for positioning the filter cartridge.
• Fixing means in the form of guide elements in combination with the snap edge are sufficient in themselves.
• Fixing means in the form of locking elements could be considered disadvantageous here because in the case of a so-called double locking on the sealing edge and, for example, in the base area, the manufacturing costs are correspondingly high because of tolerances to be observed. In principle, however, this does not exclude the combination of snap edge and locking elements.
• the snap edge enables the filter cartridge to be positioned precisely, so that not only is the optimal position of the sealing edge at the receiving opening guaranteed, but also a defined distance between the filter cartridge and the wall of the receiving chamber can be set.
• the cross section of the flow channel between the outlet opening of the filter cartridge and the outlet opening of the receiving chamber can thus also be specifically adjusted. This further enables a throttle device to be arranged between the outlet opening of the filter cartridge and the outlet opening of the receiving chamber.
• the flow rate through the filter cartridge essentially depends on the type of filter medium and the size of the outlet opening (s) of the filter cartridge. Depending on the application, e.g. In filter systems with high demands on the filter medium, for example, it may be necessary to reduce the flow quantity specified by the filter cartridge. To achieve this, changes have been made to the cartridge so far, i.e. Appropriate filter cartridges had to be manufactured and kept available for each desired flow rate.
• the advantage of the throttle device is that, on the one hand, only one type of filter cartridge is required, and the flow rate can be adjusted by selecting an appropriate receiving chamber or a corresponding inlet funnel.
• the throttle device is preferably designed such that the flow quantity supplied by the filter cartridge can be reduced by more than 0 to 95%, in particular by 10 to 80%, particularly preferably by 20 to 70%.
• the filter cartridge is preferably arranged at a distance from the peripheral wall and / or bottom wall of the receiving chamber in the region between the outlet opening and outlet opening, as a result of which a flow channel is formed.
• the minimum cross section of the flow channel then forms the throttle device.
• the cross-section of the flow channel can be set precisely by the fixing means.
• a preferred embodiment provides that at least one fixing means forms the throttle device. If, for example, a spacer element formed on the filter cartridge or the receiving chamber is arranged in the flow channel, the cross section is reduced at this point.
• the effect of the throttle device can be adjusted in a simple manner via the dimensions of one or more such spacer elements.
• the indentations of the filter cartridge and the receiving chamber are preferably spaced apart from one another at least in partial areas, so that a reduced flow cross section is set between the indentations, which forms the throttle device.
• the outlet opening or the outlet openings can form the throttle device, the cross section of the outlet opening / openings being smaller than the cross section of the outlet opening / outlet openings of the filter cartridge.
• a preferred embodiment provides for the cross section of the outlet opening / openings defined by the bead or the beads on the cylindrical or truncated cone-shaped hollow body in such a way that these outlet openings have a throttling effect.
• the throttle device can be adjustable for a given filter cartridge by selecting a receiving chamber with the appropriate dimensions or with a corresponding cross-section of the outlet opening.
• the desired flow rate can thus be set via the inlet funnel, which is advantageous insofar as the inlet funnel is not a consumable item compared to the filter cartridge.
• the consumable filter cartridge only needs to be manufactured and kept ready in one version and the flow quantity can be defined by selecting the inlet funnel. This makes it possible to significantly reduce the manufacturing costs for the device and the costs for the spare parts business.
• the outlet opening of the receiving chamber is preferably arranged above the outlet opening of the filter cartridge, so that a siphon-like arrangement is created.
• a siphon-like arrangement has the advantage, in particular in connection with the throttle device, that the filter medium is kept moist even during breaks in filtration, and thus its full operational readiness is guaranteed without reconditioning.
• the filter cartridge which can be inserted into the inlet funnel, and which has an upper cartridge part with at least one inlet opening, a lower cartridge part with at least one outlet opening and a sealing edge, is characterized in that the sealing edge is a snap edge, which is connected to one of the two cartridge parts via a film hinge is connected, the snap edge being foldable from a first lower snap position to an upper second snap position and vice versa.
• the snap edge is preferably connected to one of the two fastening flanges via the film hinge.
• the snap edge is preferably formed by a radially outwardly directed flat edge strip.
• the filter cartridge preferably has at least one fixing means which is arranged below and at a distance from the sealing edge.
• the fixing means on the filter cartridge is preferably a spacing and / or guiding and / or latching element.
• the fixing means can be depressions and projections, the projections or depressions preferably being cylindrical, conical or frustoconical.
• the locking element can be a locking cam, a locking recess or an annular bead.
• the fixing means is preferably arranged in the area of the lower half of the filter cartridge, preferably in the area of the lower third and in particular in the area of the bottom wall of the filter cartridge.
• the lower part of the cartridge has at least one indentation, an outwardly pointing mandrel preferably being arranged in the indentation.
• the indentation can also be cuboidal.
• FIG. 2 shows a perspective view, partly in section, of an inlet funnel according to a further embodiment
• FIG. 3 shows a vertical section through an inlet funnel with an inserted filter cartridge according to a further embodiment, the filter cartridge not yet in its end position
• FIG. 4 shows a section along the line F-F through the device shown in FIG. 3,
• FIG. 5 shows an enlarged sectional illustration of the area of the two indentations according to FIG. 3,
• FIG. 6 shows an enlarged sectional view of the area of the two indentations after the filter cartridge has been inserted and positioned
• FIG. 7a shows a plan view of the frustoconical hollow body according to FIG. 3,
• FIG. 7b shows a top view of a frustoconical hollow body according to a further embodiment
• FIG. 8 shows a vertical section through the frustoconical hollow body along the line HH in FIG. 7b
• FIG. 9 shows an enlarged sectional illustration of the lower region of the two indentations according to a further embodiment along the line GG of the frustoconical hollow body in FIG. 7a
• FIG. 10 shows a vertical section through a filter cartridge
• FIG. 11 shows a plan view of the filter cartridge shown in FIG. 10,
• FIG. 12 shows an enlarged sectional illustration of an edge region of the filter cartridge shown in FIGS. 10 and 11,
• FIG. 13 shows an enlarged sectional illustration of a region of the receiving opening of the inlet funnel
• FIG. 14 shows an enlarged sectional illustration of the region of the receiving opening of the inlet funnel with the snap-on edge of a filter cartridge attached
• FIG. 15 shows an enlarged representation of the area of the receiving opening of an inlet funnel with a snap-in edge of the filter cartridge
• FIG. 16 shows a vertical section through the area of the receiving opening of the inlet funnel according to a further embodiment
• FIG. 17 shows a vertical section through an inlet funnel with an inserted filter cartridge according to a further embodiment
• FIG. 18 shows a section along line BB of the device shown in FIG. 17,
• Figure 19 is an enlarged sectional view of the area of the outlet opening of the device shown in Fig. 17.
• FIG. 1 a shows a vertical section through an inlet funnel 10 with a filter cartridge 100 inserted.
• the inlet funnel 10 has a peripheral wall 11 which merges into a funnel bottom wall 12 which has a receiving opening 13.
• the filter cartridge 100 is inserted in the axial direction from above, which has an upper cartridge part 101 and a lower cartridge part 110.
• the upper cartridge part 101 is roof-shaped and has inlet openings 102.
• a sealing edge 160 is provided in the connection area between the upper cartridge part 101 and the lower cartridge part 110, which abuts the sealing seat 60 of the inlet funnel 10 in the region of the receiving opening 13.
• sealing edge 160 is shown in this figure and in the subsequent figures, it can also be a snap edge 161, as shown in FIGS. 10 to 16.
• the lower cartridge part 110 of the filter cartridge 100 has a peripheral wall 111 and a bottom wall 112, in which outlet openings 113 are arranged.
• the receiving chamber 14 is designed such that the peripheral wall 111 of the filter cartridge 100 is arranged at a distance from the peripheral wall 15 and the bottom wall 16. The filtered liquid thus collects in the lower region of the receiving chamber 14 and flows out through the outlet openings 17 shown on the right and left.
• the receiving chamber 14 with the peripheral wall 15 and the bottom wall 16 forms a holding element 20 for the filter cartridge 100.
• a second fixing means 130 is formed in the center of the bottom wall 112 of the filter cartridge 100, which in the embodiment shown here represents a spacer element. This second fixing element 130 lies on the inside of the bottom wall 16, which thus takes over the function of a first fixing element 30.
• the filter cartridge 100 is inserted or removed in the axial direction, as shown by the double arrow, in the receiving chamber 14 of the inlet funnel 10.
• the second fixing means 130 lies on the first fixing means 30, i. H. the bottom wall 16 of the receiving chamber 14.
• the operator notices this through the resistance that occurs, which signals to the operator that the end position has been reached.
• the sealing edge 160 lies sealingly against the sealing seat 60 of the receiving opening 13. The optimal position of the filter cartridge 100 is thus achieved.
• FIG. 1 b A further embodiment of the device is shown in FIG. 1 b, which differs from the device shown in FIG. 1 a in that two first fixing means 30 in the form of indentations 31 are formed on the inside of the bottom wall, which are designed as spacer elements are.
• the bottom wall 112 of the filter cartridge 100 rests on these two spacer elements 30.
• the bottom wall 112 takes over the function of the second fixing means 130.
• the two first fixing means 30 are arranged in the flow channel 201 between the outlet openings 113 and the outlet openings 17 and reduce the flow cross section at this point.
• the fixing elements 30 each form a throttle device 200.
• FIG. 2 shows a further embodiment of an inlet funnel 10 which does not have a receiving chamber 14, but instead a holding bracket 21 as a holding element 20, which consists of the two essentially vertical legs 22 a, b and a cross member 23.
• This bracket 21 spans the receiving opening 13 below the receiving opening 13, so that a filter cartridge (not shown) can be used.
• the dimensions of the bracket 21 are matched to the dimensions of the filter cartridge 100 to be used.
• the cross member 23 has a first fixing element 30 in the form of a first indentation 31 in the central region.
• This indentation 31 is conical and extends vertically upwards.
• the associated filter cartridge 100 (not shown) has a corresponding conical or truncated cone-shaped indentation in the area of its bottom wall (second indentation 130), so that the two fixing elements interact when the filter cartridge 100 is inserted axially and guide the filter cartridge.
• the fixing elements 30, 130 serve as spacing and guiding elements.
• FIG. 3 shows a vertical section through a further embodiment of the device.
• the inlet funnel 10, of which the upper was omitted for the sake of clarity, has in its bottom wall 16 in a central arrangement a first indentation 31 which is designed as a frustoconical hollow body 32.
• a first indentation 31 which is designed as a frustoconical hollow body 32.
• an arc-shaped bead 34 is formed on the inside, which, as shown in FIG. 7a, does not form a closed ring, but rather has a free space 18 which forms the outlet opening 17 after the filter cartridge has been inserted.
• the filter cartridge 100 also has an indentation 131 in its bottom wall 112, in which a mandrel 132 is formed, which extends vertically downward.
• a mandrel 132 is formed, which extends vertically downward.
• the mandrel 132 engages in the frustoconical hollow body 32, the outer surface 133 of the dome 132 sliding along the bead 34.
• the mandrel 132 and the bead 34 form first and second fixing means 30, 130, which serve as guide elements.
• the outlet opening 17 is formed between the outer surface 133 of the dome 132 and the wall 35 of the hollow body 32.
• FIG. 3 shows the filter cartridge 100 at the beginning of the insertion process.
• the sealing edge 160 which in the embodiment shown here is designed as a snap edge 161, is therefore not yet in its end position.
• the snap edge 161 will be described separately.
• FIG. 4 shows a section along line FF of the device shown in FIG. 3. It can be seen that the mandrel 132 bears against the arcuate bead 34 and also forms a seal at this point except for the outlet opening 17 (not shown in FIG. 4).
• FIG. 5 the lower area of filter cartridge 100 and receiving chamber 14 is shown enlarged, the installation state according to FIG. 3 being shown.
• the second indentation 131 has a bottom wall 134a and an annular wall 134b which extends upward from the bottom wall 112. Spacer ribs 139 are formed on the underside of the bottom wall 134a.
• the filter cartridge 100 has reached its end position and thus its sealing position.
• a flow channel 201 is formed between the bottom wall 112 of the filter cartridge 00 and the bottom wall 16 of the receiving chamber 14, which flows in the region of the two indentations 31, 131 into an ascending ring channel 202 which is formed between the wall 35 of the hollow body 32 and the ring wall 134b.
• the cross section of the ring channel 202 is smaller than that of the flow channel 201, so that a throttle device 200 'is formed.
• the annular channel 202 only forms the throttle device 200 'when the outlet opening 17 has a significantly larger cross section.
• a single outlet opening 17 is provided, which has a smaller flow cross section than the cross section of the ring channel 202, so that the outlet opening 17 is equivalent to the throttle device 200 ′.
• the two fixing elements 30, 130 in the form of the annular bead 34 and in the form of the dome 132 thus form the throttle device 200 in the assembled state.
• the spacing ribs 139 rest on the end face 39 of the hollow body 32 and therefore form second fixing means 130 as spacing elements.
• FIG. 7b A further embodiment of the hollow body 32 is shown in FIG. 7b, which differs from the embodiment shown in FIG. 7a in that a total of four circular-arc-shaped beads 34 are arranged at a distance, so that there are free spaces 18 for the outlet openings 17 between the beads 34. Whether all of these outlet openings form a throttle device 200 depends on the cross-sectional dimensions of the flow channel, in particular of the ring channel 202 in the region of the frustoconical hollow body 32.
• the hollow body 32 is shown in vertical section along the line H-H in Fig. 7b.
• the triangular shape of the circular-arc-shaped beads 34 has the advantage that the contact area with the mandrel to be inserted is minimized, so that the frictional forces are correspondingly low and the filter cartridge can be inserted and removed effortlessly.
• FIG. 9 A further embodiment is shown in FIG. 9, in which the mandrel 132 is likewise provided with a bead (second bead) 135 on its outer surface.
• the section runs through the frustoconical hollow body 32 along the line G-G in FIG. 7a.
• the mandrel 132 engages in the hollow body 32, the annular bead 135 engaging behind the bead 34 when the spacing ribs 139 rest on the end face 39. Clearances (not shown here) are provided between the spacing ribs 139, so that the liquid can flow to the outlet opening 17.
• the beads 34 and 135 form latching elements and the spacing ribs 139 spacing elements, the end face 39 of the hollow body 32 forming a stop as the first fixing means 30.
• FIG. 10 shows a vertical section through a filter cartridge 100 in order to explain the function of the sealing edge 160 in connection with the following figures.
• the upper cartridge part 101 has a mounting flange 120 which is connected, preferably welded, to the mounting flange 121 of the lower cartridge part 110.
• the mounting flange 120 extends radially outwards and has a film hinge 162, via which the snap edge 161 is articulated.
• the snap edge 161 is formed by a radially outwardly directed flat edge strip.
• the snap edge 161 in its lower position. As shown in FIG. 11, the snap edge 161 is all-round and closed, as is the film hinge 162. When folding from a lower to an upper snap position, a dead center must be overcome.
• the snap edge 161 is shown enlarged in FIG.
• the film hinge 162 is designed as a circumferential groove 163 on the underside of the mounting flange 120.
• the corresponding receiving opening 13 is shown in section and enlarged in FIG.
• the sealing seat 60 with which the snap edge 161 interacts when the filter cartridge is inserted, has a conically projecting edge section 61 which merges into the abutment section 62, which in the embodiment shown in FIG. 13 is designed as a groove 63.
• the groove 63 is opened radially inwards so that the snap edge 161 can engage, as can be seen in the following FIGS. 14 and 15.
• the start of the snap-in process is shown in FIG.
• the snap edge 161 is still in its lower position and engages with the conically rising edge section 61.
• the abutment section 62 consists of a step 64 which has a substantially horizontal surface 66 and an inwardly inclined surface 65.
• FIG. 17 shows a vertical section through an inlet funnel 10 with an inserted cartridge 100 according to a further embodiment.
• the filter cartridge 100 has a conventional sealing edge 160 which bears against the sealing seat 60 in the region of the receiving opening 13.
• Two cuboid indentations 36 and 37 are formed in the peripheral wall 15 and the bottom wall 16 of the receiving chamber 14. These indentations 36, 37 each have two side walls 40, 41 (not visible), an end wall 42, and a top wall 43.
• the outlet opening 17 is located in the end wall 42.
• Corresponding indentations 136 and 137 which are also cuboid with side walls 140, 141 (not shown in FIG. 17), end wall 142 and top wall 143, also have the cartridge 100, the corresponding walls of the cartridge and the receiving chamber being spaced apart from one another are, so that flow channels 201 are formed between the walls.
• FIG. 18 shows a section along the line B-B.
• Fixing means 30, 130 in the form of latching elements are provided in the two side walls 40, 41, 140, 141 of the rectangular indentations 36, 136.
• the locking elements are locking cams 38 which engage in corresponding locking recesses 138.
• FIG. 19 shows an enlarged illustration of the cuboid indentations 37, 137.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Water Treatment By Sorption (AREA)
• Filtration Of Liquid (AREA)
• Apparatus For Making Beverages (AREA)
• Separation Using Semi-Permeable Membranes (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34968259

Family Applications (1)

Country Status (9)

Cited By (7)

Families Citing this family (3)

Citations (9)

Family Cites Families (6)

• 2004
  • 2004-05-28 DE DE200410026166 patent/DE102004026166B3/de not_active Expired - Fee Related
• 2005
  • 2005-05-12 AU AU2005249657A patent/AU2005249657A1/en not_active Abandoned
  • 2005-05-12 EP EP05744682A patent/EP1748956A1/de not_active Withdrawn
  • 2005-05-12 RU RU2006133901/15A patent/RU2006133901A/ru not_active Application Discontinuation
  • 2005-05-12 WO PCT/EP2005/005160 patent/WO2005118481A1/de not_active Application Discontinuation
  • 2005-05-12 JP JP2007513738A patent/JP2008500158A/ja active Pending
  • 2005-05-12 CA CA002555163A patent/CA2555163A1/en not_active Abandoned
  • 2005-05-12 CN CNA2005800069044A patent/CN1926067A/zh active Pending
  • 2005-12-05 UA UAA200608829A patent/UA80371C2/uk unknown

Patent Citations (9)

Also Published As

Similar Documents

Legal Events