Filter cartridge and water filtration device

Abstract

The invention proposes a filter cartridge for a water filtration device, the water filtration device comprising an inflow funnel comprising a valve arranged in a flow channel and having a valve body (304) movable in an axial direction so as to close the flow channel in a first position of the valve body and to open the flow channel in a second position. The filter cartridge has a housing comprising an unfiltered raw water flow inlet on an upper side and a filtered water flow outlet on a lower side, and the housing contains a filter medium. Arranged on the lower side of the housing is an inversion (402). In the inversion is arranged a valve puller (502) having a main portion (505) and an actuation device moulded on the main portion, which extends away from the main portion (505) in the axial direction and comprises a receiving aperture delimited by a clamping edge (509) and formed so as to allow receiving an actuation section (606) of the valve body (304).

Description

Technical Field

[0001] This invention relates to a filter element for a water filtration device for filtering liquids, particularly a filter element for a water filtration device (e.g., a drinking water filtration device). The invention also relates to a water filtration device and a water filtration device equipped with a filter element according to the invention. Background Technology

[0002] Water filtration devices are typically used to improve water cleanliness by reducing or completely removing unwanted dissolved substances. These devices are also referred to simply as filtration systems below. For this purpose, filtration systems are usually equipped with filter cartridges, which can be replaced as they wear out during use. Filter cartridges contain filter media, including materials such as activated carbon and ion exchangers in granular form, for purifying the raw water and removing dissolved substances. Additionally, suspended solids are removed through fine-mesh screens or filter cloths. Filtration systems are used, for example, as water jugs or drinking water filters, as water tanks in equipment for preparing hot beverages, or as water tanks in refrigerators.

[0003] Drinking water filtration devices typically include a collection container for holding filtered water, into which an inflow funnel is inserted. The inflow funnel has a receiving chamber for a filter cartridge; unfiltered raw water flows into this chamber and then exits the filter cartridge as filtered water. The inflow funnel has a reservoir for holding unfiltered raw water and an outlet through which filtered water exits the inflow funnel for collection in the collection container of the filtration device. Several embodiments of such filtration devices exist in which a valve is arranged in a flow channel leading to the outlet; the valve closes the outlet or flow channel, respectively, when no filter cartridge or no matching filter cartridge is inserted into the inflow funnel. When a filter cartridge is inserted into the inflow funnel, the valve opens at the outlet through mechanical interaction between the valve body and the filter cartridge.

[0004] Such a filtration device is described, for example, in DE202016008866U1. In the flow path for filtered water, the filtration device has a valve that opens in response to the insertion of a specially designed filter cartridge. For this purpose, a helical structure is provided on the valve body, which cooperates with a corresponding structure in the filter cartridge to open the valve. In actual operation of the filtration device, this valve offers no advantage to many users, but it does have the disadvantage that users can only replace worn filter cartridges with those that match the valve, which greatly limits the selection of filter cartridges for filtration device maintenance.

[0005] Based on this, the purpose of the present invention is to manufacture an alternative filter element that can be used in various ways in different filtration systems. Summary of the Invention

[0006] To achieve this objective, according to a first aspect, the present invention provides a filter element for a water filtration device, the water filtration device comprising an inflow funnel including a valve arranged in a flow channel and having a valve body axially movable to close the flow channel in a first position and open the flow channel in a second position. The filter element has a housing including an unfiltered raw water inlet on an upper side and a filtered water outlet on a lower side, and the housing contains a filter medium. An inversion portion is arranged on the lower side of the housing. A valve puller is arranged in the inversion portion, the valve puller having a main portion and an actuating device molded on the main portion and extending axially away from the main portion, and the actuating device including a receiving orifice defined by a clamping edge and formed to allow reception of an actuation section of the valve body.

[0007] The filter element according to the invention can be flexibly used in water filtration devices with or without valves in the flow channel. In the first case, the valve puller enables a simple pull-out movement of the valve body to open the valve in the flow channel. Specifically, the valve puller is capable of lifting the valve body from the valve seat in response to the filter element being inserted into the receiving chamber, thereby opening the flow path. In the second case (i.e., without a valve in the water filtration device), the valve puller remains inactive. If it is necessary to adapt the filter element to a valve body of a different design, only the valve puller needs to be changed accordingly, for example, by making the size of the valve puller adapt to another valve body. The rest of the filter element can remain unchanged. This flexibility provides an advantage during the production of filter elements for different water filtration devices.

[0008] In an advantageous exemplary embodiment, the actuating device is formed in the shape of a truncated cone, with the narrow end of the truncated cone facing away from the main portion. This shape of the actuating device is mechanically stable and suitable for centrally positioning the filter element on the cylindrical pipe socket in the inflow funnel.

[0009] In one embodiment, the side surface of the truncated cone is a closed wall. In another embodiment, the side surface is interrupted by a number of windows and reduced to strips between the windows. In the embodiment with windows, the force required to frictionally couple the actuator to the valve body is less than in the embodiment with a closed side surface.

[0010] A further development of the embodiment mentioned last above, the window extends to the receiving hole, such that one end of the strip is connected to the main portion, and the other end forms a free end. This embodiment can be compressed most easily compared to other embodiments. The front face of the strip is axially oriented and extends obliquely relative to the longitudinal direction of the strip.

[0011] In a further advantageous development of the filter element, the wall of the side surface is divided into multiple lamellae by slits, one end of which is connected to the main part, and the other end forms a free end. In this further development, a substantially closed side surface is obtained, in which case the force required to deform the side surface is smaller than that required for embodiments with a completely closed side surface.

[0012] At the narrow end of the truncated cone, a tube seat forming a clamping edge is advantageously molded on the side surface. The tube seat enlarges the clamping edge, thereby improving the frictional coupling between the valve body and the valve puller.

[0013] In an alternative embodiment, the clamping edge is formed by the free end of the strip or the free end of the sheet. The strip or sheet each has a support surface oriented axially and abutting against the outer circumferential support of the valve body.

[0014] It has been proven advantageous to form ridges pointing outwards on the side surfaces of the strip. These ridges rest against the inflow funnel and define the support points of the strip. Therefore, preferably, the deformation of the strip occurs around the corresponding support points, thereby ensuring good reproducibility of mechanical properties.

[0015] In an alternative, the strip is weakened at a single point, particularly through notches. Preferably, the deformation of the strip occurs at the point where the mechanical weakening is arranged. The bending characteristics of the strip can be easily defined based on the appropriate positioning and size of the mechanical weakening.

[0016] Advantageously, spacer ribs are formed on the outer circumference of the main portion, thereby creating at least one gap in the housing of the filter element between the main portion and the inner side of the inverted portion. When the actuator seals the tube seat in the inflow funnel using its outer surface, the spacer ribs ensure the flow path of the filtered water. In these cases, the filtered water can only flow out through the receiving orifice in the valve puller. The spacer ribs keep the flow path of the filtered water to the receiving orifice open.

[0017] It has been proven advantageous for the spacer ribs to extend all the way to the front of the main section. This ensures that the flow path of the filtered water is also available between the bottom of the main section and the inverted section within the filter cartridge.

[0018] Advantageously, the actuator is elastically formed, and when the actuator deforms in the radial direction, the actuator is frictionally coupled to the actuation section of the valve body via the clamping edge. Preferably, the deformation of the actuator occurs when the filter cartridge is inserted into the receiving chamber of the inflow funnel.

[0019] In a preferred exemplary embodiment of the filter element, positioning ribs are arranged on the main portion, the positioning ribs being perpendicular to the main portion and extending in a direction away from the actuating device. The positioning ribs ensure improved stability of the valve puller on the inflow funnel seat of the water filtration device.

[0020] According to a second aspect of the invention, a valve puller for a water filtration device is provided, the water filtration device comprising an inflow funnel including a valve arranged in a flow channel and having a valve body axially movable to close the flow channel in a first position and open the flow channel in a second position. The valve puller is sized such that it fits into an inverted portion of a filter element, which can be inserted into a receiving chamber of the inflow funnel. The valve puller has a main portion and an actuating device molded on the main portion, extending axially away from the main portion, and includes a receiving orifice defined by a clamping edge and formed to allow reception of an actuating section of the valve body.

[0021] The valve puller is adapted to pull the valve body from a first position to a second position in response to the insertion of the filter element into the receiving chamber of the inflow funnel. This opens the flow path of the filtered water. As a molded component, the valve puller can be manufactured cost-effectively and allows the filter element to be used in water filtration devices that include a valve in the flow path, wherein the filter element does not need to be adapted to the valve in the water filtration device.

[0022] According to a third aspect of the invention, a water filtration device is provided, which includes a filter element according to a first aspect of the invention. Attached Figure Description

[0023] The invention will now be described in more detail by way of example with reference to the accompanying drawings. All drawings are merely schematic and not drawn to scale, wherein: Figure 1 A filter device shaped like a kettle is shown in perspective. Figure 2 A perspective view of the filter cartridge shown at an angle from the top; Figure 3 Shown in cross-section Figure 1 The cross-section of the inflow funnel of the filtration device; Figure 4 Shown at an angle from the bottom Figure 2 A perspective view of the filter element; Figures 5A to 5D Showing the use of Figure 2 Exemplary embodiments of the valve puller for the filter element; Figure 5E Shown in cross-section, including Figure 5B The cross-section of the receiving chamber of the valve puller; Figure 6AThe valve body is shown in perspective. Figure 6B Shown in cross-section Figure 6A Valve body; Figure 7A A cross-section of a receiving chamber with an inserted filter element is shown, where the filter element has not yet reached its termination position; Figure 7B Show Figure 7A The cross-section of the filter element is shown in the termination position; Figure 8A Showing the use of Figure 2 A fourth exemplary embodiment of the valve puller for the filter element; and Figure 8B Shown in cross-section with Figure 8A The cross-section of the receiving chamber of the valve puller.

[0024] In the accompanying drawings, identical or similar elements have identical or similar reference numerals. In the following description of exemplary embodiments, directional information, such as “top,” “bottom,” “up,” or “down,” refers to the corresponding position or direction in the respective drawings described. Detailed Implementation

[0025] Figure 1 This is a perspective view showing an exemplary embodiment of a liquid filtration device 100 as viewed from the side. In the illustrated exemplary embodiment, the device 100 is formed as a drinking water jug ​​and has a collection container 101 for holding filtered water. A handle 102 for operation is arranged on the collection container 101. A pouring spout 103 is also provided on the upper edge of the collection container 101. During use of the device, the user can grasp the collection container 101 by the handle 102 and pour the filtered water into, for example, a glass (not shown) via the pouring spout 103. An inflow funnel 104 is inserted into the collection container 101, the inflow funnel having a top opening and a lower region having a filter cartridge 200 (… Figure 2 The inflow funnel 104 has a circumferential flange 107 on its upper edge, which rests against the edge of the collection container 101, thus retaining the inflow funnel 104 within the collection container 101. Therefore, the bottom 108 of the inflow funnel 104 is separated from the bottom 109 of the collection container 101 by a distance H. The bottom 108 of the inflow funnel 104 has one or more outlets from which filtered water flows out of the inflow funnel 104 and into the collection container 101. The upper side of the inflow funnel 104 is closed by a removable cover 111 to prevent dust or dirt particles from falling into the inflow funnel 104 during use of the filtration device 100.

[0026] Figure 2The diagram shows a schematic perspective view of a filter element 200 viewed from a top angle. An upper portion of the housing, or cover 201, forms the upper side of the filter element 200 and is disposed on a cup-shaped bottom portion 202 of the housing. The cover 201 and the bottom portion 202 together form the housing of the filter element 200, which is generally indicated by reference numeral 203. Filter material is contained within the housing 203 of the filter element. The filter material, for example, is in the form of filter particles, loosely contained or located within... Figure 2 Invisible liquids can permeate the nonwoven filter bag. Different filter materials can be used to remove unwanted substances, ions, and / or particles or suspended solids from the water separately.

[0027] The cover 201 has multiple inlets 204 through which unfiltered liquid (particularly raw water) flows into the interior of the filter element 200. A handle 206 allows the filter element 200 to be gripped and pulled out of the receiving chamber 106 of the inflow funnel 104 for necessary replacement. A sealing edge 207 is visible at the upper edge of the housing bottom portion 202. The housing bottom portion 202 also includes a housing bottom 208 and circumferential sidewalls 209.

[0028] The bottom of the housing is divided into a generally elliptical shape, the ellipse being, for example, 70 to 80 mm long in the longitudinal direction and 40 to 50 mm long in the transverse direction. In an exemplary embodiment, the cover 201 can be removed from the bottom portion 202 of the housing, thereby making the interior of the filter element 200 accessible. After removing the cover 201, the user can replace the consumed filter particles with new filter particles. This replacement can be performed particularly directly and simply when the filter particles are contained in a closed filter bag.

[0029] Figure 3 The receiving chamber 106, into which the inflow funnel 104 is shown in cross-section.

[0030] The receiving chamber 106 has a bottom 301 with a pipe seat 302. The valve base portion 303, which receives a movable valve body 304, is inserted into the pipe seat 302. The valve body 304 can move back and forth in the vertical direction. Figure 3 In the diagram, a double arrow 306 indicates the direction of movement. When valve body 304 is in the terminated position (in...),... Figure 3 When the valve body 304 is positioned at the bottom (as shown in the diagram), it rests on the valve seat (not shown) and closes the flow path of filtered water through the seat 302. The valve seat forms a lower stop for movement of the valve body 304. When the valve body is raised from the lower stop position, the flow path of water supply through the seat 302 is opened. The seat 302 has a circumferential annular bead 305, which forms an upper stop for the valve body 304, so that the valve body is captured in the seat 302 and will not fall out even if the inflow funnel is inverted. The valve bottom portion 303 and the valve body 304 together form a valve located in the filtered water flow path.

[0031] Figure 4 The diagram shows a perspective view of the filter element 300 viewed from a bottom angle. The cup-shaped housing bottom portion 202 has guide grooves 401A and 401B, which engage with corresponding guide strips (not shown) in the receiving chamber 106 when the filter element 200 is inserted into the receiving chamber 106 of the flow-in funnel 104. In this way, the filter element 300 is supported in a stable mounting position within the receiving chamber 106. Figure 4 The arrangement of the inverted portion 402 in the bottom 208 of the housing bottom portion 202 is shown. Outlets 403A and 403B, having outlets for filter screens 404A and 404B, are provided on both sides of the inverted portion 402. During operation of the filtration device, the filtered liquid flows out of the filter element 200 through outlets 403A and 403B.

[0032] The inverted portion 402 engages with the tube seat 302 in the receiving chamber 106. This is when the filter element 200 is ready for operation. Figures 5A to 5D One of the valve pullers 501-503 shown (for clarity) Figure 4 (omitted) is arranged in the inverted part 402.

[0033] Figure 5A A first exemplary embodiment of the valve puller 501 is shown. The valve puller 501 has a circular main portion 505 on which a wall 506 is molded, forming an actuation device 507. The wall 506 has the shape of a truncated cone side surface (the cap surface of the truncated cone is omitted). An annular strip 508 is formed on the fine end of the truncated cone of the wall 506, the inner side of which serves as a clamping edge 509 and surrounds a receiving hole. As will be further described below, a plurality of (e.g., four) spacer ribs 512 are formed on the circular main portion 505 to keep the flow path for filtered water from the filter element 200 open. The spacer ribs 512 are formed along the circumference of the main portion 505 and on the main side of the main portion 505 (opposite to the wall 506). The main portion 505 is annular in shape. Arrow z indicates the axial orientation of the valve puller 501. This convention for the axial direction also applies. Figures 5B to 5D The valve pullers 502 and 503 are shown.

[0034] A second exemplary embodiment of the valve puller 502 is in Figure 5B As shown, the valve puller has four windows 513 in the wall 506. Between the windows 513, the wall 506 is reduced to a strip 514, which connects to the main portion 505 on one side and to the annular strip 508 on the other. Raises 516, for example having a spherical segment shape, are formed on the strip 514.

[0035] A variation of the second exemplary embodiment of valve puller 502' is shown in Figure 5C The image is shown in cross-section. Valve puller 502' differs from valve puller 502 in that it has a notch 517 instead of a protrusion 516. Figure 5C In the strip 514, the notch 517 is formed from the outside to the inside. In a modified variant, the notch 517 can also be arranged from the inside to the outside in the strip 514, that is, located on opposite sides of the strip 514.

[0036] In a modified example (not shown) of valve pullers 502, 502', the annular strip 508 is broken and consists of several arcs, specifically the number of arcs corresponding to the number of strips 514 in valve pullers 502, 502'. In this modified example, in response to the insertion of filter element 200 into receiving chamber 106, strip 415 can be more easily deflected relative to direction z.

[0037] Finally, a third exemplary embodiment of the valve puller 503 is described in... Figure 5D As shown, this embodiment is similar to Figure 5B The difference in valve puller 502 is that window 513 extends all the way into the receiving hole, and there is no annular strip 508. Therefore, one end of strip 514 is connected to the main portion 505, and the other end has a free end 518, with the inner surface 519 of the strip forming a clamping edge 509. The inner surface 519 is oriented axially, and thus, when filter element 200 is inserted into receiving chamber 106, the inner surface 519 rests substantially on the entire surface of valve body 304. Figure 5E A perspective cross-sectional view of the valve puller 502 positioned on the tube seat 302 is shown in an exemplary manner, wherein the filter element 200 is omitted from the figure for clarity. The valve puller 502 initially extends into the tube seat 302 together with the annular strip 508. The bulge 516 thus rests on the annular protrusion 305. When the valve puller 502 is pushed into the tube seat 302 in response to the filter element being inserted into the receiving chamber 106 in the direction of arrow 520, the strip 514 elastically deforms, thereby compressing the annular strip 508 and lifting it in the direction opposite to arrow 520. The compression of the annular strip 508 has the effect of reducing the free diameter of the receiving orifice. Therefore, the annular strip 508 is in frictional contact with the valve body 304, particularly with the actuation section 606 ( Figure 6A , 6BFrictional contact is established, lifting the valve body to its second position. The compression of the annular strip 508 is not absolutely necessary for establishing sufficient frictional contact with the valve body 304 to lift the valve body. Sufficient frictional contact is already established when the valve body 304 slides into the receiving hole in response to the insertion of the filter element 200 into the receiving chamber 106. Thus, the bulge 516 serves as a support point for the double-sided lever formed by the strip 514. The compressive force applied in response to the insertion of the filter element 200 into the receiving chamber 106 is transmitted via the main portion 505 to the valve puller 502'. For the valve puller 502', when the strip 514 is supported against the annular protrusion 305, the strip 514 deforms at the point where the notch 517 is arranged. Preferably, the notch 517 is spaced far from the main portion 505, thereby separating it from the annular protrusion 305.

[0038] For valve puller 503, strip 514 also elastically deforms in a corresponding manner, so that the inner surfaces 519 of strip 514 move closer to each other and move upward in the opposite direction to arrow direction 520.

[0039] For valve puller 501, wall 506 deforms in response to insertion of filter element 200. Therefore, annular strip 508 is compressed in the same manner as valve puller 502 and lifted in the direction opposite to arrow direction 520. In this case, sufficient frictional contact is already formed between annular strip 508 and valve body 304 when valve body 304 slides into receiving hole of valve puller 502.

[0040] Figure 6A Valve body 304 is shown in perspective. (Example) Figure 3 As shown, the valve body 304 is housed in the pipe seat 302 and can move vertically within the pipe seat 302. Figure 3 The double arrow (306) moves back and forth. Two guide rings 601 and 602 ensure that the valve body 304 is guided within the seat 302. The guide rings are spaced apart from each other and have an outer diameter slightly smaller than the inner diameter of the seat 302, so that the valve body 304 is guided within the seat 302 with clearance. The two guide rings 601 and 602 are connected to each other by a web 603. A sealing surface 604 is formed on the bottom side of the valve body 304 in the mounting position. A conical actuation section 606 is arranged on the top side of the valve body 304 in the mounting position.

[0041] Figure 6B The valve body 304 is shown in cross-section. Guide rings 601 and 602 have holes 607 and 608 for providing a flow path for liquid (particularly water) in the axial direction of the valve body 304. The axial direction extends along axis 609 (indicated by a dashed line).

[0042] Figure 7AA cross-section of the receiving chamber 106, including the filter element 200, is shown. The filter element 200 is inserted into the receiving chamber 106, whereby the inverted portion 402 engages with the tube seat 302. Therefore, an annular gap 701 is formed between the tube seat 302 and the inverted portion 402. The bottom 208 of the filter element 200 housing is located at a distance above the bottom 301 of the receiving chamber 106. In the bottom 208 of the filter element 200 housing, outflow filter screens 404A and 404B, respectively surrounded by annular edges 702A or 702B, for balancing water flow can be seen.

[0043] The valve puller 502 is inserted into the inverted part 402 via a press fit. Figure 7A In the illustration shown, filter element 200 has not yet reached its termination position (assuming the filter element is in the termination position during operation of the filter device 100), which can be seen from the distance 703 between the front surface 704 of the tube seat 302 and the main portion 505. The position of the filter element shown is labeled as position I. Nevertheless, the actuation section 606 is still accommodated in the receiving hole, such that the clamping edge 509 is in frictional contact with the actuation section 606.

[0044] The valve seat 302 is closed by means of the valve bottom portion 303, which provides a valve seat 706 for the valve body 304 and has at least one outlet 707. When the valve body 304 is supported against the valve seat, the outlet is closed by the valve body 304.

[0045] Although the guide rings 601 and 602 of the valve body 304 allow longitudinal back-and-forth movement 306 ( Figure 3 The valve body 304 remains trapped between the valve bottom portion 303 and the annular protrusion 305. The actuation section 606 of the valve body 304 extends from the pipe seat 302.

[0046] Valve puller 502 is configured to pull the filter element 200 from the valve puller 502. Figure 7A Position I shown is moved out and reached. Figure 7B When in position II as shown, pull the valve body 304 upwards away from the valve seat.

[0047] Figure 7B The filter element 200 is shown in the terminated position (position II), with the main portion 505 resting on the front surface 704 of the seat 302. A protrusion 516 rests on the annular flange 305. Due to the compressive force transmitted to the main portion 505 in response to the insertion of the filter element 200 into the receiving chamber 106, the annular strip 508 or the clamping edge 509 respectively lifts the valve body 304 from the valve seat 706, creating a gap 708 between the valve bottom portion 303 and the valve body 304, and opening the outlet 707. When the filter element 200 is removed from... Figure 7AWhen the valve body 304 is raised from position I to position II, the frictional contact between the annular strip 508 and the valve body 304 is sufficient to raise the valve body 304.

[0048] When filter element 200 is in position II, valve body 304 opens the flow path for filtered water. Water flows out from filter screens 404A and 404B, rises in the inverted portion 402, and flows through the main portion 505 between spacer ribs 512. Then, water flows through window 513 and holes 607 and 608 in valve body 304, finally flowing out of outlet 707. Window 513 is provided in valve pullers 502 and 503, but not in valve puller 501.

[0049] Therefore, the valve puller 501 is only used when the clamping edge 509 does not tightly surround the actuation section 606 of the valve body. This is, for example, when structures are provided on the actuation section 606, forming flow channels between these structures in the axial direction of the valve body 304.

[0050] In another exemplary embodiment of the filter element 200 (not shown), a spacer rib is provided in the inverted portion 402, which holds the main portion 505 of the valve puller at a certain distance from the bottom 709 of the inverted portion 402.

[0051] Valve pullers 501-503 also help stabilize the filter cartridge in the receiving chamber, regardless of whether a valve is arranged in the inflow funnel 104. If no valve is arranged in the inflow funnel 104, the valve pullers 501-503 are similar to "grabbing nothing". The valve puller 501 can also be equipped as a throttling element to control the flow rate of filtered water through the filter cartridge 200. When the main portion 505 is sealed on the front surface 704 of the tube seat 302, the flow rate can be set by a spacer rib 512 of appropriate size. The spacer rib 512 determines the size of the free space between the walls of the main portion 505 and the inverted portion 402. The size of the free space can be selected such that the valve puller 501 forms a delimiting element for limiting the flow rate through the filter cartridge. Accordingly, this also applies to the aforementioned variant of the valve puller 501, in which the wall of the side surface is divided into multiple segments by means of slits.

[0052] Figure 8A Another valve puller 801 is shown, which, for further improved stability, has a positioning rib 802 located on the tube seat 302, extending vertically away from the main portion 505. The positioning rib 802 rises above the main portion 505 in the same direction as the strip 514. In each case, the free end of the positioning rib 802 has a rising ramp 803. Otherwise, the valve puller 801 is the same as the valve puller 502.

[0053] Figure 8B A perspective cross-sectional view is shown with the valve puller 801 positioned on the tube seat 302, wherein the filter element 200 is omitted for clarity. The positioning rib 802 externally engages the tube seat 302 and ensures that the valve puller 801 and the filter element 200 do not tilt in response to insertion into the receiving chamber 104. The rising ramp 803 facilitates the connection of the valve puller 801 to the tube seat 302 or the insertion of the filter element 200 into the receiving chamber 104.

[0054] exist Figures 5B to 5D and Figure 8A In the present embodiment, valve pullers 502, 503, and 801 have four strips 514. In contrast, in other exemplary embodiments, more or fewer than four strips 514 are provided. Therefore, the operating modes of valve pullers 502 and 503 are not significantly affected.

[0055] In the described exemplary embodiment, the valve puller is shown as a part that is initially separate from the filter element 200 and is inserted into the inverted portion 402 of the filter element 200 in a final manufacturing step. However, alternatively, the valve puller can also be injection molded to the bottom portion 202 of the filter element 200 housing in a single manufacturing step.

[0056] List of reference numerals 101 Collection Container 505 Main part 102 handle 506 wall 103 Pouring spout 507 Actuation device 104 Inflow into the funnel 508 Annular strip 509 Clamping edge 106 Refrigeration room 107 Circumferential flange 512 Spacer Ribs 108 Flow into the bottom of the funnel 513 window 109 bottom of container 514 strip 516 bulge 111 build 517 Notch 518 Free end 200 filter element 519 inner surface 201 Upper part of the shell, cover 520 Insertion direction 202 Bottom of the shell 203 Overall shell 601、602 Guide ring 204 Inlet 603 web 604 sealing surface 206 handle 606 Actuation section 207 Sealing edge 607、608 hole 208 bottom of the casing 609 axis 209 Circumferential sidewall 701 Annular gap 301 bottom 702a, 702b Circular edge 302 tube seat 703 gap 303 Valve bottom section 704 Front surface 304 Valve body 706 valve seat 305 Circular convex edge 707 Outlet 306 Double arrow 708 gap 401a, 401b Guide groove 709 Bottom of the inverted part 402 Inverted part 403a, 403b Outlet 801 Valve puller 404a, 404b Flowing out of the filter 802 Positioning ribs 803 Ascending slope

Claims

1. A water filtration device (100) comprising an inflow funnel (104) including a receiving chamber (106) for a filter element (200), wherein the receiving chamber (106) has a tube seat (302) forming a flow channel, a valve is arranged in the flow channel, the valve having a valve body (304) having an actuation section (606) axially movable to close the flow channel in a first position and open the flow channel in a second position. in, The filter element has a housing (201, 202, 203), the housing includes an unfiltered raw water inlet (204) on the upper side and a filtered water outlet (403A, 403B) on the lower side, and the housing contains a filter medium, wherein an inverted portion (402) is arranged on the lower side of the housing (201, 202, 203). A valve puller (501-503, 801) is arranged in the inverted portion (402), the valve puller having a main portion (505) and an actuating device molded on the main portion and extending away from the main portion (505) in the axial direction, and the actuating device including a receiving hole defined by a clamping edge (509) and formed to allow the actuating section (606) of the valve body (304) to be received. The feature is that when the filter element (200) is inserted into the receiving chamber (106), the clamping edge (509) is frictionally coupled to the actuation section (606) of the valve body (304) when the actuation section (606) is received in the receiving hole, and the actuation device is deformed by the tube seat (302), thereby the clamping edge (509) lifts the valve body from the first position to the second position along the axial direction.

2. The water filtration device according to claim 1, characterized in that, The actuating device is formed in the shape of a truncated cone, the fine end of which is away from the main portion (505), and the truncated cone has a side surface.

3. The water filtration device according to claim 2, characterized in that, The side surface of the truncated cone is a closed wall (506), or the side surface of the truncated cone is interrupted by a number of windows (513) and reduced to strips (514) between the windows.

4. The water filtration device according to claim 3, characterized in that, The window (513) extends to the receiving hole, such that one end of the strip (514) is connected to the main part (505), and the other end forms a free end (518).

5. The water filtration device according to claim 2, characterized in that, The side surface is divided into multiple pieces by a slit, one end of each piece being connected to the main part (505) and the other end being a free end.

6. The water filtration device according to claim 2, characterized in that, On the side surface, the fine end of the truncated cone is molded with an annular strip (508) forming the clamping edge (509).

7. The water filtration device according to claim 3, characterized in that, On the side surface, the fine end of the truncated cone is molded with an annular strip (508) forming the clamping edge (509).

8. The water filtration device according to claim 4, characterized in that, The clamping edge (509) is formed by the free end (518) of the strip (514).

9. The water filtration device according to claim 5, characterized in that, The clamping edge is formed from the free end of the plate.

10. The water filtration device according to claim 3 or 4, characterized in that, A raised section (516) pointing outward from the side surface is formed on the strip (514).

11. The water filtration device according to claim 3 or 4, characterized in that, The strip (514) has a notch (517) at one point.

12. The water filtration device according to any one of claims 1 to 9, characterized in that, Spacer ribs (512) are formed on the outer circumference of the main part (505), thereby forming at least one gap between the main part (505) and the inner side of the inverted part (402) in the housing (201, 202, 203) of the filter element (200).

13. The water filtration device according to any one of claims 1 to 9, characterized in that, The main part (505) is provided with a positioning rib (802) that extends perpendicularly to the main part (505) in the same direction as the actuation device away from the main part.

Images