Pre-filter mounting module and pre-filter thereof

Abstract

The utility model discloses a pre-filter mounting module and a pre-filter thereof, and belongs to the field of water purifying and drinking machines. According to the filtering installation module, the inner supporting frame used for supporting the outer wall face of the filter element module is arranged in the outer shell, the inner supporting frame is provided with the arc-shaped support body used for being attached to the outer wall face of the filter element module in a matched mode, and the bottom connecting plate is arranged at the bottom end of the support body and detachably connected with the lower sealing cover. The top end of the support body is detachably connected with the inner wall of the outer shell. The filter element module and the outer shell are tightly supported by the inner supporting frame, the supporting strength of the outer shell to the filter element module is improved, the structural stability of the outer shell is enhanced, and the situation that the filter element module shakes under the impact or overturning effect, and consequently the sealing performance of the water gap is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, and more specifically to a pre-filter installation module and a pre-filter thereof. Background Art

[0002] Water purifiers integrate water purification and drinking water. According to different household usage scenarios, they have developed into various structural installation forms such as under-the-sink, countertop, and wall-mounted. For example, the under-the-sink type is mainly installed in the kitchen cabinet. The installation space environment under the kitchen is inherently limited. Under the premise of ensuring sufficient purification function, in order to streamline the size of the water purifier host, the industry generally adopts the form of separately setting up a pre-filter and separating it from the water purifier host. A pre-filter is installed in the front section of the under-the-sink water purifier to filter out large particles such as mud, rust, insect eggs, and red worms in the tap water, and restore the tap water to the standard before leaving the factory. Before connecting it to the rear section of the water purifier, it also helps to reduce damage to the filter module of the water purifier.

[0003] The pre-filter needs to be directly connected to the kitchen water system. Kitchen water needs to be discharged quickly with a large flow rate, which places stricter demands on the filter element's impact resistance and sealing performance. Keeping the filter element in a stable position is of great significance. The filter element needs to be replaced during use. The kitchen environment is limited, so it is more troublesome to replace the filter element. Careless operation is more likely to cause water leakage. Improving the application stability and disassembly and assembly convenience of the pre-filter has also become a factor affecting user experience.

[0004] At present, there are a lot of technical disclosures for pre-filters. For example, the patent with publication number CN220125695U provides a filter cartridge seat and a water purifier thereof. The filter cartridge seat is provided with a water inlet cavity opening downward, a water outlet cavity opening downward, a water inlet and a water outlet. The water outlet includes a first water outlet hole and a second water outlet hole respectively connected to the water outlet cavity. The water flow rate of the second water outlet hole is greater than the water flow rate of the first water outlet hole. This design directly controls the flow rate of the water outlet hole to meet the large flow demand of kitchen water, but does not pay much attention to the disassembly and connection safety during the application of the filter. The patent with publication number CN216170530U provides a quick-connect pre-filter, focusing on improving the connection compatibility by improving the threaded joint structure. The patent with publication number CN211357906U provides a quick-disassembly pre-filter, which uses the filter cartridge assembly and the filter body as two independent components. The filter body is provided with a filter cartridge assembly port, and the filter cartridge assembly is quickly disassembled and installed on the filter body through the filter cartridge assembly port. The patent with publication number CN219136398U provides a water purifier, including a filter element, a housing and a core changing unit, the core changing unit including a core changing rod and a locking disk, the core changing rod can move relative to the upper housing to drive the locking disk to switch between a locking position for locking the filter element and an unlocking position for releasing the lock of the filter element, greatly reducing the difficulty of core changing. The above multiple designs can respectively realize the rapid disassembly and assembly of the filter and the water pipe or the rapid disassembly and assembly of the filter element and the housing, but in practice the overall application experience of the pre-filter is still insufficient, and it is of great significance to realize the comprehensive performance improvement of the pre-filter. Utility Model Content

[0005] 1. Technical problems to be solved by the utility model

[0006] In view of the fact that the pre-filter is subjected to water flow impact and disassembly and replacement during long-term use, higher requirements are placed on the stability of the filter element position and the sealing. The utility model intends to provide a pre-filter installation module and its pre-filter. The use of this installation module helps to ensure the stability of the filter element position and improve the convenience and safety of the filter element disassembly and installation process.

[0007] 2. Technical solution

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0009] The pre-filter installation module of the utility model comprises an outer shell body, an upper cover and a lower cover for enclosing the installation space of the filter element module, the end where the lower cover is located is the insertion end for inserting the filter element module, and the end where the upper cover is located is the connection end for connecting the filter element module to the water outlet; an inner support frame for supporting the outer wall surface of the filter element module is provided in the outer shell body, and the inner support frame has an arc-shaped support body for adapting and fitting with the outer wall surface of the filter element module, and the support body encloses a chamber for inserting the filter element module; along the axial direction of the filter element module, the height of the support body extends to the main body height that can cover the filter element module; the bottom end of the support body has a bottom connecting plate that is detachably connected to the lower cover, and the top end of the support body is detachably connected to the inner wall of the outer shell body. By setting the inner support frame, the support strength of the outer shell body to the filter element module can be effectively improved, the position stability of the filter element module during long-term application and installation and replacement can be ensured, water leakage due to impact or shaking can be prevented, and the safety of use can be improved. Specifically, one end of the filter element module is the water inlet connection end, and the other end is the pull-out end that can be grasped. The filter element module can be placed vertically or horizontally when in use. When used in a horizontal position, the inner support frame can be provided to effectively support the main body length direction of the filter element module, especially to stably support the pull-out end of the filter element module, to prevent the sealing ring of the water inlet connection end of the filter element module from failing due to the sagging of the pull-out end. In addition, by separately providing an inner support frame in the outer shell to support the filter element module, the difficulty of the processing technology of the outer shell can be effectively reduced, and it is convenient to control the appearance quality; and because the inner support frame has an arc-shaped support wall surface that is adapted to fit the outer wall surface of the filter element module, it can ensure stable support, making the shape design of the outer shell more flexible and able to adapt to the design of outer shells of different shapes.

[0010] In combination with the practical processing convenience and the support and fastening requirements for the filter element module, further, a plurality of groups of internal support frames are provided in the outer shell, and the plurality of groups of internal support frames are sequentially distributed around the circumference, and the interior together forms a chamber for inserting the filter element module, and the plurality of groups of internal support frames are integrally formed by injection molding. Adjacent internal support frames are kept in contact or non-contact, thereby forming a chamber with a closed or non-closed cross section. For example, if two groups of internal support frames are provided, each group of internal support frames can be selected to have a semicircular wall surface, and the two groups of spliced ​​contact just fit with the outer wall of the filter element module; each group of internal support frames can be selected to have an arc wall surface with an arc angle less than 180°, and the two groups of internal support frames are respectively fitted on the outer wall of the filter element module and maintain a certain gap, which can meet the stable support effect of the filter element module, and at the same time simplify the size of the internal support frames, reduce production costs and component weight.

[0011] In practice, a more preferred design is that the outer shell adopts a shell structure with a rectangular cross-section, and the inner cavity of the outer shell corresponds to a rectangular cavity; taking a square shell as an example, compared with a cylindrical shell, a square shell is easier to be formed by injection molding, which optimizes processing convenience and low cost, and is convenient for placement on the cabinet wall. The outer side of the outer shell is a regular plane structure, which is also convenient for the regular placement of other daily necessities in the cabinet, saving more space. At the same time, it must be considered that the mismatch of the internal space shape of the square inner cavity with the cylindrical filter element module must focus on the installation stability of the filter element module. In this solution, an inner support frame with an arc-shaped wall is used to support the outer periphery of the filter element module, which can effectively ensure the stability of the filter element module during use and disassembly.

[0012] In order to further reduce the weight of the inner support frame, in practice, a hollow groove that penetrates the thickness is opened in the middle of the support body, and both ends of the hollow groove in the height direction do not extend to the end edges of the support body, so that the upper and lower parts of the support body have continuous arc-shaped wall surfaces, thereby ensuring the overall support strength. Correspondingly, a plurality of groups of reinforcing ribs can be provided on the outer wall surface of the support body away from the filter element module to improve the structural strength. In the height distribution area of ​​the hollow groove, the reinforcing ribs can be arranged in multiple layers along the height direction, and each layer of reinforcing ribs surrounds the circumference of the support body in the horizontal direction; in the area above and below the hollow groove, multiple groups of reinforcing ribs can be provided to extend longitudinally and also surround the circumference of the support body.

[0013] In order to facilitate the flexible installation of the inner support frame, a card-embedding groove is further opened on the bottom connecting plate at the bottom end of the bracket body, and a corresponding buckle for fitting into the card-embedding groove is provided on the lower cover, and the bottom surface of the bottom connecting plate is located on both sides of the card-embedding groove and a guide plate extending downward is also provided, so that the inner support frame and the lower cover can be detachably connected by the buckle. Other detachable connection methods can also be used in practice.

[0014] To meet the water demand in the kitchen, it is further designed that a water connection valve plate for installing the filter element module is provided in the outer shell above the inner support frame, and a water inlet pipe for connecting to the filter element inlet and a water outlet pipe one and a water outlet pipe two for connecting to the filter element outlet are provided on the water inlet pipe, a connecting joint is provided on the water outlet pipe for connecting to the tap, a connecting joint is provided on the water outlet pipe one for connecting to the kitchen faucet, and the water outlet pipe two is used to connect to the water purifier under the kitchen. By diverting the water after pre-filtration, a part of it is directly connected to the kitchen water faucet without subsequent filtration, which can meet the water quality requirements of kitchen clean water and meet the large flow water demand at the same time; a part of it is connected to the water purifier for further filtration to meet the drinking water demand and realize diverse choices of kitchen water.

[0015] To facilitate the connection, further, the extension direction of the water inlet pipe and the water outlet pipe 1 is located in the same straight line direction, the water outlet pipe 2 and the water outlet pipe 1 are connected in parallel and connected to the filter element outlet, and the extension direction of the water outlet pipe 2 and the water outlet pipe 1 is perpendicular.

[0016] To facilitate the precise positioning and installation of the pipeline, further, a plurality of downwardly extending installation grooves are provided on the top wall of the outer shell, and the water inlet pipe, water outlet pipe one and water outlet pipe two are correspondingly embedded in the corresponding installation grooves and extend outside the outer shell, thereby realizing the clamping limit of the pipeline to prevent shaking from affecting the sealing of the pipeline connection.

[0017] In order to further improve the sealing of the pipeline connection, a joint connecting part is further provided around the outer end of the water inlet pipe, and a joint connecting cavity is formed between the joint connecting part and the water inlet pipe. The connecting joint is integrally formed in the joint connecting cavity by injection molding, and a sealing ring is also provided between the connecting joint and the inner wall of the joint connecting part.

[0018] Furthermore, in order to achieve precise positioning and installation of the pipeline, an annular rib is provided on the water inlet pipeline at the side of the joint connection part away from the connecting joint, and an annular matching groove is formed between the annular rib and the joint connection part. The water inlet pipeline is embedded in the installation slot opened at the top of the outer shell through the matching groove, and the annular rib and the joint connection part are respectively located on the inner and outer sides of the installation slot; the water outlet pipeline has the same matching groove embedded in the corresponding installation slot; and the upper cover is correspondingly provided with a plurality of groups of installation blocks, which are embedded in the installation slots and the matching slots from top to bottom in sequence to achieve detachable limited installation of the upper cover.

[0019] In order to improve the connection performance between the connecting joint and the joint connecting part, further, the outer wall of the end of the connecting joint that is close to the joint connecting part is provided with a circle of toothed portion along the circumferential direction, and the toothed portion extends to contact the circumferential inner wall of the joint connecting cavity; the sealing ring is located on the side of the toothed portion away from the inner end face of the joint connecting part, and an annular sealing groove is provided on the outer wall of the connecting joint to cooperate with the installation of the sealing ring.

[0020] To facilitate the internal connection and installation of the outer shell, an inner connecting plate is further provided on the inner side of the upper part of the outer shell, and a circular opening is provided in the center of the inner connecting plate for the end of the filter element module to pass through. The water channel connecting valve plate is located above the inner connecting plate and is detachably connected to the inner connecting plate, and the inner support frame is located below the inner connecting plate and is detachably connected to the inner connecting plate.

[0021] The utility model also provides a pre-filter, including the pre-filter installation module as described above, and also includes a filter element module, the filter element module is located in an installation chamber surrounded by an inner support frame, and the filter element inlet of the filter element module is connected to the water inlet pipe of the water connection valve plate, and the filter element outlet of the filter element module is respectively connected to the water outlet pipe 1 and the water outlet pipe 2 of the water connection valve plate. The pre-filter of this scheme can be used in conjunction with water purification equipment in a variety of installation environments, including but not limited to under-sink water purifiers.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0024] (1) The pre-filter installation module of the utility model is provided with an inner support frame for supporting the outer wall surface of the filter element module in the outer shell, the inner support frame has an arc-shaped support body for adapting and fitting with the outer wall surface of the filter element module, the bottom end of the support body has a bottom connecting plate and a lower cover that is detachably connected, and the top end of the support body is detachably connected to the inner wall of the outer shell; the filter element module and the outer shell are tightly supported by the inner support frame, thereby improving the supporting strength of the outer shell for the filter element module and enhancing the structural stability of the outer shell, thereby preventing the filter element module from shaking under the action of impact or overturning and affecting the sealing of the water outlet.

[0025] (2) The pre-filter installation module of the utility model distributes the purified water after pre-filtration in different ways through the water channel connection valve plate. The water outlet pipe 1 is directly connected to the large kitchen faucet without entering the water purifier for subsequent filtration by other filters, thereby effectively improving the filtration efficiency and ensuring the large flow of water from the large kitchen faucet. The water outlet pipe 2 is further connected to the water purifier under the kitchen for further filtration to meet the drinking water quality requirements.

[0026] (3) The pre-filter installation module of the utility model has a plurality of downwardly extending installation slots on the top wall of the outer shell, and the water inlet pipe, water outlet pipe 1 and water outlet pipe 2 are correspondingly embedded in the corresponding installation slots, which can further ensure the position stability of each pipe, prevent the pipe from shaking, and also facilitate connection with the kitchen drain pipe.

[0027] (4) The pre-filter installation module of the utility model has an annular joint connection part surrounding the outer end of the water inlet pipe, and a joint connection cavity is formed between the joint connection part and the water inlet pipe. The connecting joint is integrally formed in the joint connection cavity by injection molding, and a sealing ring is also provided between the connecting joint and the inner wall of the joint connection part, thereby effectively avoiding water leakage and improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of the pre-filter of the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the front view structure;

[0030] Figure 3 for Figure 1 Schematic diagram of the internal structure of the middle pre-filter after removing the outer shell;

[0031] Figure 4 for Figure 1 Schematic diagram of the structure of the middle shell;

[0032] Figure 5 This is a schematic diagram of the structure of the inner support frame in the utility model;

[0033] Figure 6 This is a schematic diagram of the inner wall structure of the inner support frame in the utility model;

[0034] Figure 7 for Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0035] Figure 8 This is a schematic diagram of the assembly structure of the filter element module and the water channel connection valve plate in the utility model;

[0036] Fig. 9 This is a structural schematic diagram of the filter element module in the utility model;

[0037] Fig.10 It is a schematic diagram of the enlarged structure of the assembly end of the filter element module and the water channel connection valve plate;

[0038] Fig.11 It is a structural schematic diagram of the upper cover in the utility model;

[0039] Fig.12 This is a structural schematic diagram of the water channel connecting the valve plate in the utility model;

[0040] Fig.13 A schematic diagram of a water channel connection valve plate from a top view;

[0041] Fig.14 A schematic diagram of a water channel connection valve plate from an upward perspective;

[0042] Fig.15 It is a schematic diagram of the cross-sectional structure of the water channel connection valve plate;

[0043] Fig.16 It is a partial enlarged structural schematic diagram of the external water inlet at the end of the water channel connecting the valve plate;

[0044] Fig.17 This is an enlarged structural diagram of the connection joint at the end of the water channel connecting the valve plate.

[0045] Explanation of the symbols in the schematic diagram:

[0046] 100. Pre-filter;

[0047] 110, outer shell; 111, mounting slot; 112, inner connecting plate;

[0048] 120, upper cover; 121, installation block;

[0049] 130, lower cover; 131, buckle;

[0050] 200, water connection valve plate;

[0051] 201, water inlet pipe; 202, water outlet pipe 1; 203, water outlet pipe 2; 204, connecting joint; 205, one-way valve; 206, annular rib; 207, joint connecting part; 208, matching groove; 209, valve plate inlet; 210, valve plate outlet; 211, joint connecting cavity; 212, toothed part; 213, sealing groove; 214, sealing ring;

[0052] 300, inner support frame; 301, support body; 302, hollow groove; 303, bottom connecting plate; 304, embedded groove; 305, reinforcing rib; 306, guide plate;

[0053] 400, filter element module; 401, filter element inlet; 402, filter element outlet. DETAILED DESCRIPTION

[0054] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0055] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0056] In addition, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; the terms "first", "second", "third", and "fourth" should be understood in a broad sense, and are only used to distinguish feature names, and do not indicate a specific order relationship. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0057] The utility model is further described below in conjunction with embodiments.

[0058] Example

[0059] The present embodiment provides a pre-filter installation module. In order to realize direct drinking filtration of water quality, multiple filtering means are generally required in the industry, such as conventional PP cotton filtration at the front end, RO membrane filtration at the middle end, activated carbon filtration at the back end, etc. The industry usually has an integrated one-piece filtration design, which integrates multiple filters into one and installs them in the water purifier. However, this will cause the integrated filter to be larger in size, and the corresponding water purifier is too large. In addition, the integrated filters can only be replaced uniformly, and the lifespan of filters made of different materials is different. Uniform replacement will inevitably cause waste of resources or reduce the filtering effect.

[0060] This embodiment adopts a split installation method for different filters and provides a corresponding installation module for the pre-filter. Figure 1-Figure 17 As shown, the pre-filter installation module includes an outer shell 110, an upper cover 120 and a lower cover 130 for enclosing the installation space of the filter element module 400. The end where the lower cover 130 is located is an insertion end for inserting the filter element module 400, and the end where the upper cover 120 is located is a connection end for connecting the filter element module 400 to the water outlet; Figure 1 In terms of orientation, this figure shows the vertical distribution state of the pre-filter when it is installed in the kitchen environment. At this time, the upper cover 120 is facing upwards, the lower cover 130 is facing downwards, and the filter element module 400 is in an upside-down state inside. Before the pre-filter is installed under the kitchen for the first time, the filter element module 400 needs to be installed first. At this time, the upper cover 120 is in a flat or downward inverted state, and the filter element module 400 is inserted inward from the end where the lower cover 130 is located, so that there is enough installation space for the first installation of the filter element module 400. After being installed in the under-kitchen environment, the upper cover 120 faces upwards and the lower cover 130 faces downwards, so that the connection end of the filter element module 400 connected to the water outlet faces upwards, thereby facilitating connection with the water pipe used for connection under the kitchen, saving the length and space occupied by the water pipe, and because the kitchen water pipe generally adopts a bellows, the bellows has good bending flexibility. When it is necessary to disassemble and replace the filter element module 400 later, the end where the lower cover 130 is located is turned outward at a certain angle, and the lower cover 130 is opened to rotate and disassemble the internal filter element module 400 and take it out, and then replace and install it. The disassembly and assembly method is relatively convenient, and there is no need to repeatedly disassemble and assemble the entire pre-filter with the under-kitchen corrugated water pipe, and it also minimizes the flow of part of the accumulated water in the water pipe into the cabinet due to the disassembly and assembly of the corrugated water pipe. The pre-filter installation module of this embodiment can also be applied to pre-filters in other installation environments, including but not limited to the under-kitchen type.

[0061] In practice, the water used by kitchen drinking water purification equipment has certain particularities, especially the large amount of water used in the kitchen, and the requirements for water quality are different. There are higher requirements for drinking water, and there are also lower requirements for cleaning water. Cleaning water obviously needs to be discharged quickly at a large flow rate to meet user needs. However, the RO membrane filter commonly used in drinking water purification equipment will obviously affect the water quality and water outlet efficiency. Based on this, the present embodiment makes an optimized design. The upper part of the inner cavity of the outer shell 110 is provided with a water channel connecting valve plate 200 for installing the filter element module 400. The water channel connecting valve plate 200 is provided with an inlet pipe 201 for connecting to the filter element inlet 401, and an outlet pipe 1 202 and an outlet pipe 2 203 for connecting to the filter element outlet 402. More precisely, the bottom of the water channel connecting valve plate 200 has a valve plate inlet 209 which is installed and connected with the filter element inlet 401, and the water inlet pipe 201 is connected with the valve plate inlet 209. The tap water enters the filter element inlet 401 through the valve plate inlet 209. The bottom of the water channel connecting valve plate 200 has a valve plate outlet 210 which is installed and connected with the filter element outlet 402. The valve plate outlet 210 is connected with the outlet pipe 1 202 and the outlet pipe 2 203. The water inlet installation of the filter element module 400 and the waterway connecting valve plate 200 still adopts the rotating installation method in the traditional technology, which is easy to install. The water inlet pipe 201 is provided with a connecting joint 204 for connecting the tap water pipe, so that the kitchen tap water enters the filter element module 400 for pre-filtration, and the water outlet pipe 1 202 is provided with a connecting joint 204 for connecting the kitchen faucet, that is, the kitchen large faucet. The water outlet pipe 203 is used to connect the water purifier for subsequent filtration. Specifically, a one-way valve 205 can be set at the end of the water outlet pipe 203 to prevent the filtered water from flowing back. The clean water after pre-filtration is distributed differently through the waterway connecting valve plate 200. The water outlet pipe 1 202 is directly connected to the kitchen large faucet without entering the water purifier for subsequent filtration by other filters, thereby effectively improving the filtration efficiency and ensuring the large flow drainage of the kitchen large faucet. The water outlet pipe 203 is further connected to the matching water purifier for continued filtration to meet the drinking water quality requirements. More preferably, the extension directions of the water inlet pipe 201 and the water outlet pipe 1 202 are parallel or located in the same straight line direction, so as to facilitate the inlet and outlet connection on both sides, and the water outlet pipe 203 and the water outlet pipe 1 202 can be connected in parallel and communicated with the filter outlet 402, and the extension directions of the water outlet pipe 203 and the water outlet pipe 1 202 are perpendicular. The overall pipeline distribution is more beautiful and practical, and correspondingly, the outer shell 110 can also adopt a rectangular shell form, which is beautiful and easy to take and move, and the processing process is also more convenient.

[0062] Considering the above-mentioned usage environment characteristics, the long-term use of the pre-filter not only involves the need to flip and disassemble the filter element module 400, but also faces the impact of the large flow of water in and out of the kitchen on the filter element module 400. It is imperative to improve the installation stability and sealing of the filter element module 400. Especially in the under-kitchen installation environment, the filter element module 400 is inverted for a long time during use and needs to be flipped at an angle during disassembly. The stability of the filter element module 400 not only affects its long-term application safety, but also affects the convenience and safety during the disassembly process. Based on this, combined with Figure 3-Figure 6 As shown, an inner support frame 300 for supporting the outer wall of the filter element module 400 is provided in the outer shell 110, and the inner support frame 300 has an arc-shaped support body 301 for adapting and fitting with the outer wall of the filter element module 400, and the bottom end of the support body 301 has a bottom connecting plate 303 which is detachably connected to the lower cover 130, and the top of the support body 301 is detachably connected to the inner wall of the outer shell 110; the water path connecting valve plate 200 is located above the inner support frame 300, and the filter element module 400 is installed by passing through the arc-shaped chamber surrounded by the inner support frame 300 and rotatably installed on the water path connecting valve plate 200, and the filter element module 400 and the outer shell 110 are tightly supported by the inner support frame 300, thereby improving the supporting strength of the outer shell 110 for the filter element module 400, and enhancing the structural stability of the outer shell 110, and preventing the filter element module 400 from shaking under impact or overturning and affecting the sealing of the water outlet.

[0063] In practice, the inner support frame 300 is preferably formed in one piece by injection molding. To facilitate processing, multiple groups of inner support frames 300 are arranged separately, that is, multiple groups of inner support frames 300 are evenly spaced along the circumferential direction in the outer shell 110, such as Figure 3 As shown in the figure, two groups of inner support frames 300 can be used to be symmetrically distributed on the periphery of the filter element module 400, and a hollow groove 302 that penetrates the thickness is opened in the middle of the support body 301 to achieve structural weight reduction. The extension length of the hollow groove 302 is limited, so that the upper and lower parts of the support body 301 still maintain complete arc-shaped wall surfaces to maintain stable support for the filter element module 400; in addition, a plurality of groups of reinforcing ribs 305 are provided on the outer wall surface of the support body 301 away from the filter element module 400 to improve the structural strength and support stability, and the reinforcing ribs 305 can be extended horizontally or vertically.

[0064] In this embodiment, in order to realize the rapid installation of the inner support frame 300, refer to Figure 4As shown, an inner connecting plate 112 is provided on the inner side of the upper part of the outer shell 110, and a circular opening is provided in the center of the inner connecting plate 112 for the end of the filter element module 400 to pass through. The waterway connecting valve plate 200 is located above the inner connecting plate 112 and is detachably connected to the inner connecting plate 112, such as by bolts or snap connections; the inner support frame 300 is located below the inner connecting plate 112 and is detachably connected to the inner connecting plate 112, such as by bolts or snap connections. The inner connecting plate 112 not only serves as a connecting and mounting component, but also further limits the end of the filter element module 400 to maintain stability, such as Figure 8 and Fig. 9 As shown, the size of the upper connecting end of the filter element module 400 is relatively smaller than the size of the lower main cylindrical section. The inner connecting plate 112 in the outer shell 110 allows the smaller upper connecting end to pass through, and further limits the lower main cylindrical section, thereby preventing the filter element module 400 from moving in the up and down directions.

[0065] In addition, combined Figure 3 , Figure 5 and Figure 7 As shown, a snap-fitting groove 304 is provided on the bottom connecting plate 303 at the bottom end of the bracket body 301, and a snap-fitting 131 for fitting into the snap-fitting groove 304 is provided on the lower cover 130, and a guide plate 306 extending downward is provided on the bottom surface of the bottom connecting plate 303 located on both sides of the snap-fitting groove 304. The guide plate 306 may be provided with an inclined wall surface so that the snap-fitting 131 can be quickly inserted into the snap-fitting groove 304, and the top of the snap-fitting 131 may have a protrusion to be stuck on the bottom wall of the snap-fitting groove 304. In practice, other detachable connection methods may be used between the bottom connecting plate 303 and the lower cover 130, such as bolt connection, etc., but snap-fit ​​connection is preferably used, so that the lower cover 130 can be quickly opened without using tools to disassemble and assemble the filter element module 400.

[0066] Further preferably, in combination Figure 4 As shown, the top wall of the outer shell 110 is provided with a plurality of downwardly extending mounting slots 111, and the water inlet pipe 201, the water outlet pipe 1 202 and the water outlet pipe 2 203 are correspondingly embedded in the corresponding mounting slots 111 and extend out of the outer shell 110. The mounting slots 111 can further ensure the position stability of each pipe, prevent the pipe from shaking, and facilitate connection with the water pipe. Fig.12 and Fig.13As shown, a joint connecting portion 207 is provided around the outer end of the water inlet pipe 201, and an annular rib 206 is further provided on the side of the joint connecting portion 207 away from the connecting joint 204 on the water inlet pipe 201. A ring-shaped matching groove 208 is formed between the annular rib 206 and the joint connecting portion 207. The water inlet pipe 201 is matched and embedded in the installation slot 111 provided at the top of the outer shell 110 through the matching groove 208. The annular rib 206 and the joint connecting portion 207 are respectively located on the inner and outer sides of the installation slot 111, and can achieve stable limit engagement in multiple directions of up, down, left, and right; the same matching groove 208 is provided on the water outlet pipe 202 and embedded in the corresponding installation slot 111; further, combined with Fig.11 As shown, the upper cover 120 is provided with a plurality of sets of mounting blocks 121, which are sequentially embedded in the mounting slots 111 and the matching slots 208 from top to bottom. An arc-shaped opening can be provided at the bottom of the mounting block 121 located at the position of the second water outlet pipe 203 to achieve a snap-fit ​​fit with the wall surface of the one-way valve 205 installed on the second water outlet pipe 203.

[0067] In this embodiment, the outer end of the water inlet pipe 201 is surrounded by a ring-shaped joint connection part 207, and the extension length of the water inlet pipe 201 exceeds the length of the joint connection part 207, so that a joint connection cavity 211 is formed between the joint connection part 207 and the water inlet pipe 201. In order to improve the sealing performance of the water pipe connection part, the connecting joint 204 is preferably formed in one piece in the joint connection cavity 211 by injection molding, and a sealing ring 214 is also provided between the connecting joint 204 and the inner wall of the joint connection part 207, so as to effectively avoid water leakage. More specifically, in combination with Fig.15 and Fig.17 As shown, the outer wall of the connecting joint 204, at one end thereof close to and abutting against the joint connecting portion 207, is provided with a circle of toothed portions 212 along the circumferential direction, and the toothed portions 212 extend to contact with the circumferential inner wall of the joint connecting cavity 211, which helps to enhance the structural strength and force distribution between the connecting joint 204 and the joint connecting portion 207, and mitigate damage to components caused by disassembly and assembly and flipping; the sealing ring 214 is located on the side of the toothed portion 212 away from the inner end face of the joint connecting portion 207, and the outer wall of the connecting joint 204 is provided with an annular sealing groove 213 to cooperate with the installation of the sealing ring 214.

[0068] This embodiment also provides a pre-filter, that is, Figure 1As shown, the pre-filter 100 includes the pre-filter installation module as described above, and also includes a filter element module 400. The filter element module 400 is located in the installation chamber surrounded by the inner support frame 300, and the filter element inlet 401 of the filter element module 400 is connected to the water inlet pipe 201 of the water-connected valve plate 200, and the filter element outlet 402 of the filter element module 400 is respectively connected to the water outlet pipe 1 202 and the water outlet pipe 2 203 of the water-connected valve plate 200. Similarly, the pre-filter can be used in combination with water purifiers in a variety of installation environments, including but not limited to under-sink water purifiers.

[0069] The protection scope of the present invention is limited only by the claims. Thanks to the teachings of the present invention, those skilled in the art will easily recognize that alternative structures to the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. A pre-filter installation module, comprising an outer shell (110) for enclosing an installation space for a filter element module (400), an upper cover (120) and a lower cover (130), wherein the end of the lower cover (130) is an insertion end for inserting the filter element module (400), and the end of the upper cover (120) is a connection end for connecting the filter element module (400) to a water outlet; Features: An inner support frame (300) is arranged inside the outer shell (110), and the inner support frame (300) has an arc-shaped support body (301) adapted to fit with the outer wall surface of the filter core module (400), and the support body (301) is surrounded by a chamber for inserting the filter core module (400); along the axial direction of the filter core module (400), the support body (301) extends to a height that can cover the main body of the filter core module (400); The bottom end of the bracket body (301) has a bottom connecting plate (303), the bottom connecting plate (303) is detachably connected to the lower cover (130), and the top end of the bracket body (301) is detachably connected to the upper inner wall of the outer shell (110).

2. The pre-filter installation module according to claim 1, characterized in that: A plurality of groups of inner support frames (300) are arranged in the outer shell (110), and the plurality of groups of inner support frames (300) are sequentially distributed in a circumferential direction, and together form a chamber for inserting the filter element module (400) therein, and the plurality of groups of inner support frames (300) are integrally formed by injection molding; adjacent inner support frames (300) are in contact or non-contact with each other, thereby forming a chamber with a closed or non-closed cross section.

3. The pre-filter installation module according to claim 2, characterized in that: The outer shell (110) adopts a shell structure with a rectangular cross section, and the inner cavity of the outer shell (110) is correspondingly a rectangular cavity.

4. The pre-filter installation module according to claim 1, characterized in that: A hollow groove (302) penetrating the thickness is provided in the middle of the bracket body (301), and both ends of the hollow groove (302) in the height direction do not extend to the end edges of the bracket body (301), so that the upper and lower parts of the bracket body (301) have continuous arc-shaped wall surfaces.

5. The pre-filter installation module according to claim 1, characterized in that: A snap-fitting groove (304) is provided on the bottom connecting plate (303) at the bottom end of the bracket body (301), and a buckle (131) for fitting into the snap-fitting groove (304) is correspondingly provided on the lower cover (130), and guide plates (306) extending downward are provided on both sides of the snap-fitting groove (304) on the bottom surface of the bottom connecting plate (303).

6. The pre-filter installation module according to claim 1, characterized in that: A water channel connecting valve plate (200) for installing the filter element module (400) is also provided in the outer shell (110) above the inner support frame (300); a water channel connecting valve plate (200) is provided with a water inlet pipe (201) for connecting to the filter element inlet (401), and a first water outlet pipe (202) and a second water outlet pipe (203) for connecting to the filter element outlet (402); a connecting joint (204) is provided on the water inlet pipe (201) for connecting to a tap water pipe, a connecting joint (204) is provided on the first water outlet pipe (202) for connecting to a kitchen faucet, and the second water outlet pipe (203) is used to connect to an under-kitchen water purifier.

7. The pre-filter installation module according to claim 6, characterized in that: A plurality of downwardly extending mounting slots (111) are provided on the top wall surface of the outer shell (110); the water inlet pipe (201), the first water outlet pipe (202) and the second water outlet pipe (203) are correspondingly embedded in the corresponding mounting slots (111) and extend outside the outer shell (110).

8. The pre-filter installation module according to claim 6, characterized in that: A joint connection portion (207) is provided around the outer end of the water inlet pipe (201), a joint connection cavity (211) is formed between the joint connection portion (207) and the water inlet pipe (201), the connection joint (204) is integrally formed in the joint connection cavity (211) by injection molding, and a sealing ring (214) is further provided between the connection joint (204) and the inner wall of the joint connection portion (207).

9. The pre-filter installation module according to any one of claims 6 to 8, characterized in that: An inner connecting plate (112) is provided on the inner side of the upper portion of the outer shell (110), and a circular opening is provided at the center of the inner connecting plate (112) for the connecting end of the filter element module (400) to pass through; the water channel connecting valve plate (200) is located above the inner connecting plate (112) and is detachably connected to the inner connecting plate (112); and the inner supporting frame (300) is located below the inner connecting plate (112) and is detachably connected to the inner connecting plate (112).

10. Pre-filter, characterized in that: It comprises a pre-filter installation module as described in any one of claims 1 to 9, and also comprises a filter element module (400), the filter element module (400) is located in an installation chamber surrounded by an inner support frame (300), and a filter element inlet (401) of the filter element module (400) is connected to a water inlet pipe (201) of a water-connected valve plate (200), and a filter element outlet (402) of the filter element module (400) is respectively connected to a water outlet pipe 1 (202) and a water outlet pipe 2 (203) of the water-connected valve plate (200).

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