Filter head, filter head assembly and water purification equipment

Abstract

The utility model relates to the technical field of water purification equipment, in particular to a filter head, a filter head assembly and water purification equipment. The filter head comprises a first pipeline, a second pipeline and a connecting seat communicated with the filter element, and the first pipeline and the second pipeline are respectively communicated with the connecting seat; a first connector and a second connector are formed in the two opposite ends of the first pipeline and the second pipeline correspondingly, and a connector positioning groove is formed in the outer surface of the first connector. An interface inner cavity capable of accommodating the first interface is formed in the second interface, and an interface groove structure extending from the outer surface to the inner cavity is formed in the second interface; the first connector of the first pipeline and the second connector of the second pipeline face the same direction, and the second connector of the first pipeline and the first connector of the second pipeline face the same direction. Through the reasonable arrangement of the filter heads, the filter heads can be connected in series and in parallel for use of the multi-stage filter water purification equipment, and the filter heads are provided with standardized interfaces and are simple in structure, small in occupied space and high in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a filter head, a filter head component and water purification equipment. Background Art

[0002] Traditional multi-stage filtration water purification equipment has multiple filter elements, which leads to complex water channels, many quick connectors, long pipe connection time, difficult installation, large size and difficult maintenance. In addition, due to the large number of required parts, it is necessary to develop multiple sets of structural molds, which easily leads to high production error rate and high production cost. In addition, traditional multi-stage filtration water purification equipment is mostly dedicated to special machines, and different types of water purifiers cannot use the same parts, which leads to problems such as high production mold opening and manufacturing costs, low maintenance efficiency and high maintenance costs.

[0003] At present, there are connectors suitable for multi-stage filter elements on the market, but in complex waterways, different types of connectors are still required for complex connections. Not only are the structures complex, they occupy a large space, and have low installation efficiency, but the specifications of connectors on the market are uneven, which can easily cause the risk of water leakage during interconnection and assembly. Utility Model Content

[0004] In order to solve at least one of the shortcomings of the joint components of the conventional multi-stage filtering water purifier in the prior art, the utility model provides a filtering head including a first pipeline, a second pipeline and a connecting seat for connecting a filter element, wherein the first pipeline and the second pipeline are respectively connected to the connecting seat;

[0005] The first pipeline and the second pipeline are respectively formed with a first interface and a second interface at their respective opposite ends, and an interface positioning groove is provided on the outer surface of the first interface; the second interface is formed with an interface inner cavity that can accommodate the size of the first interface, and the second interface is provided with an interface groove structure extending from the outer surface to the inner cavity; the first interface of the first pipeline and the second interface of the second pipeline are oriented in the same direction, and the second interface of the first pipeline and the first interface of the second pipeline are oriented in the same direction.

[0006] In one embodiment, it further includes at least one first branch pipe and / or at least one second branch pipe, wherein the first branch pipe is integrally arranged with and communicated with the first pipeline, and the second branch pipe is integrally arranged with and communicated with the second pipeline.

[0007] The utility model also provides a filter head assembly, including multiple filter heads and buckles for connecting adjacent filter heads, the filter head adopts the filter head described in any of the above embodiments; the first interface of the first pipeline of the filter head is fixedly connected to the second interface of the first pipeline of the adjacent filter head by a buckle, and the second interface of the second pipeline of the filter head is fixedly connected to the first interface of the second pipeline of the adjacent filter head by a buckle; and also includes a sealing assembly for realizing pipeline sealing between adjacent filter heads.

[0008] In one embodiment, the interface groove structure includes at least one interface card hole and at least one interface snap ring located on the same circumferential surface of the second interface, the interface card hole is a hole formed by passing through the outer surface of the second interface toward the inner cavity of the interface, and the interface snap ring is a groove formed by extending the interface card hole toward the inner surface of the second interface.

[0009] In one embodiment, the buckle has a buckle body and two clamping feet extending from the buckle body to both sides, and an annular cavity that can cooperate with the interface positioning groove of the first interface is formed between the two clamping feet; the thickness of the buckle gradually decreases from the buckle body to the clamping feet; when the adjacent filter heads are connected, the first interface extends into the inner cavity of the second interface, and the clamping feet of the buckle pass through the interface clamping hole and are embedded between the interface clamping ring of the second interface and the interface positioning groove of the first interface, so that the first interface and the second interface are fixed.

[0010] In one embodiment, the filter head assembly further includes one or more accessories selected from the group consisting of a second plugging member, a first plugging member, a second connecting member, a first connecting member, and an internal plugging member, so as to realize parallel and / or series connection of the inlet and outlet waterways between the plurality of filter heads;

[0011] The second blocking member is used to block the first interface of the filter head;

[0012] The first blocking member is used to block the second interface of the filter head;

[0013] The second connecting member is used to connect the external pipe with the first interface of the filter head;

[0014] The first connecting member is used to connect the external pipeline with the second interface of the filter head;

[0015] The internal plugging member is used to plug the pipeline communication between adjacent filter heads.

[0016] In one embodiment, the second blocking member is formed with a blocking inner cavity that can accommodate the size of the first interface, and the second blocking member is provided with a blocking groove structure extending from the outer surface to the inner cavity; when the first interface is blocked, the first interface extends into the blocking inner cavity of the second blocking member, and the buckle fixes the second blocking member to the first interface through the blocking groove structure;

[0017] A sealing positioning groove is provided on the outer surface of the first sealing piece, and the first sealing piece extends into the inner cavity of the second interface. The clip foot passes through the interface clip hole and is embedded between the interface clip ring of the second interface and the sealing positioning groove of the first sealing piece, so that the first sealing piece is fixed to the second interface.

[0018] In one embodiment, the second connecting member has a first end and a second end, and the first end and the second end of the second connecting member are connected to form a connecting inner cavity; the first end of the second connecting member is provided with a second external connection interface having the same structure as the second interface, so as to be connected to the first interface of the filter head; the second end of the second connecting member is provided with a second threaded structure, so as to be threadedly connected to the external pipe;

[0019] The first connecting member has a first end and a second end, and the first end and the second end of the first connecting member are connected to form a connecting inner cavity; the first end of the first connecting member is provided with a first external interface structure that is the same as the first interface structure, so as to be connected to the second interface of the filter head; the second end of the first connecting member is provided with a first threaded structure, so as to be threadedly connected to the external pipe.

[0020] In one embodiment, the internal sealing part can be embedded in the first interface, and a plurality of annular sealing grooves are provided on the outer surface of the internal sealing part. The pipeline of the adjacent filter head is sealed between the internal sealing part and the first interface by a sealing seal embedded in the annular sealing groove.

[0021] The utility model also provides a water purification device, which adopts the filter head as described in any embodiment, or adopts the filter head assembly as described in any embodiment above, and also includes at least one filter element detachably connected to the connecting seat.

[0022] Based on the above, compared with the prior art, the filter head provided by the utility model can be used to meet the serial and parallel connection of the filter head by multi-stage filtering and water purification equipment through the reasonable setting of the interface, and the interface is standardized, with a simple structure, small space occupation and strong versatility.

[0023] In addition, the utility model also provides a filter head assembly, which can further realize the serial and parallel connection of multi-stage filtering and water purification equipment by reasonably designing the accessories used with the filter head and standardizing the interface of the accessories, and equipping different accessories and filter heads. It has few accessories, simple and effective assembly, and low mold manufacturing cost. It can not only adapt to more application occasions, but also effectively reduce the risk of water leakage, especially suitable for large-flux water purification environments.

[0024] Other features and beneficial effects of the utility model will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other beneficial effects of the utility model can be achieved and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions of the components shown in the diagrams unless otherwise specified.

[0026] Figure 1 A three-dimensional diagram of a filter head provided in one embodiment of the utility model;

[0027] Figure 2 A side view of a filter head provided in one embodiment of the utility model;

[0028] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0029] Figure 4 for Figure 2 Cross-sectional view of the middle BB;

[0030] Figure 5 This is an exploded schematic diagram of adjacent filter heads connected by snap fasteners;

[0031] Figure 6 A three-dimensional diagram of the buckle;

[0032] Figure 7 is a side view of the buckle;

[0033] Figure 8 This is a front view of adjacent filter heads connected by snap fasteners;

[0034] Fig. 9 for Figure 8 Cross-sectional view of the middle DD;

[0035] Fig.10 is a three-dimensional diagram of the second blocking member;

[0036] Fig.11 is a cross-sectional view of the second blocking member;

[0037] Fig.12 is a three-dimensional diagram of a first blocking member and a sealing assembly;

[0038] Fig.13 is a cross-sectional view of the first blocking member and the sealing assembly;

[0039] Fig.14 is a three-dimensional diagram of a second connecting member;

[0040] Fig.15 is a cross-sectional view of the second connecting member;

[0041] Fig.16 is a three-dimensional diagram of a first connecting member and a sealing assembly;

[0042] Fig.17 is a cross-sectional view of the first connecting member and the sealing assembly;

[0043] Fig.18 It is a three-dimensional diagram of the internal blocking member;

[0044] Fig.19 is a cross-sectional view of an internal blocking member;

[0045] Fig. 20 is a three-dimensional diagram of a first switching member;

[0046] Fig.21 is a front half-section view of the first switching member;

[0047] Fig. 22 is a three-dimensional diagram of a second switching member;

[0048] Fig.23 are a top view and a half-section view of the second switching member;

[0049] Fig.24 The main view of the scheme of connecting four filter heads to four filter elements in series and in parallel;

[0050] Fig.25 A partial side view of a scheme for connecting four filter heads in series and in parallel with four filter elements;

[0051] Fig.26 The waterway schematic diagram of Scheme 1 and Fig.25 Partial cross-sectional view of EE;

[0052] Fig. 27 The waterway schematic diagram of Scheme 2 and Fig.25 Partial cross-sectional view of EE;

[0053] Fig.28 The waterway schematic diagram of Scheme 3 and Fig.25 Partial cross-sectional view of EE;

[0054] Fig.29 The waterway schematic diagram of Scheme 4 and Fig.25 Partial cross-sectional view of EE;

[0055] Fig.30 The waterway schematic diagram of Scheme 5 and Fig.25 Partial cross-sectional view of EE;

[0056] Fig.31 The waterway schematic diagram of Scheme 6 and Fig.25 Partial cross-sectional view of EE;

[0057] Fig.32 The waterway schematic diagram of Scheme 7 and Fig.25 Partial cross-sectional view of EE;

[0058] Fig.33 The waterway schematic diagram of Scheme 8 and Fig.25 Partial cross-sectional view of EE.

[0059] Reference numerals:

[0060] DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments; the technical features designed in different implementation modes of the utility model described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0062] In the description of the present invention, it should be noted that all terms (including technical terms and scientific terms) used in the present invention have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limitations on the present invention; it should be further understood that the terms used in the present invention should be understood to have meanings consistent with the meanings of these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in this utility model.

[0063] See also Figure 1~Figure 4 The utility model provides a filter head including a first pipeline 110, a second pipeline 120 and a connecting seat 130 for connecting a filter element, wherein the first pipeline 110 and the second pipeline 120 are respectively connected to the connecting seat 130; the first pipeline 110 and the second pipeline 120 are respectively formed with a first interface 140 and a second interface 150 at their respective opposite ends.

[0064] In specific implementation, the first pipeline 110 and the first interface 140 and the second interface 150 at both ends are integrally arranged, and the second pipeline 120 and the first interface 140 and the second interface 150 at both ends are integrally arranged. The connection between the first pipeline 110, the second pipeline 120 and the connecting seat 130 can be integrally arranged, or can be other detachable or non-detachable connections, for example, the detachable connection can be a threaded connection, a snap connection, etc., and the non-detachable connection can be welding, bonding, riveting, etc., and can be conventionally designed according to actual needs.

[0065] Furthermore, the outer surface of the first interface 140 is provided with an interface positioning groove 141; the second interface 150 is formed with an interface inner cavity that can accommodate the size of the first interface 140, and the second interface 150 is provided with an interface groove structure 151 extending from the outer surface to the inner cavity. The first interface 140 of the first pipeline 110 and the second interface 150 of the second pipeline 120 are oriented in the same direction, and the second interface 150 of the first pipeline 110 and the first interface 140 of the second pipeline 120 are oriented in the same direction. That is, in the same horizontal direction, the first interface 140 and the second interface 150 of the first pipeline 110 are oriented opposite to the first interface 140 and the second interface 150 of the second pipeline 120, respectively.

[0066] According to the structural design of the interface of the filter head 100 described above, when multiple filter heads 100 need to be connected, the first interface 140 of the first pipeline 110 of a filter head 100 is inserted into the interface inner cavity of the second interface 150 of the first pipeline 110 of the adjacent filter head 100, and the interface inner cavity of the second interface 150 of the second pipeline 120 of the filter head 100 is sleeved on the first interface 140 of the second pipeline 120 of the adjacent filter head 100 to achieve the connection between the first pipeline 110 and the first pipeline 110, and the connection between the second pipeline 120 and the second pipeline 120 between the adjacent filter heads 100, and then fixed by relevant accessories. Among them, when the first interface 140 and the second interface 150 are sleeved, the interface positioning groove 141 of the first interface 140 corresponds to the interface groove structure 151 of the second interface 150, so as to facilitate the fixation of relevant fasteners. The specific interface positioning groove 141 and the interface groove structure 151 are not limited to the present embodiment. Figure 4 As shown in , according to the present concept, those skilled in the art may also adopt other conventional structures designed for fastening two pipelines in the prior art to replace the design of the interface positioning groove 141 and the interface groove structure 151 shown in this embodiment.

[0067] Through the above-mentioned design of the filter head 100, adjacent filter heads 100 can be directly connected and then fixed with other fasteners. There is no need to use other additional connecting components to connect adjacent filter heads 100 in series, which effectively avoids the problems of increased manufacturing and maintenance costs, increased installation difficulty and increased risk of water leakage caused by additional connecting components.

[0068] In addition, the size and structural design of the connection base 130 are not limited to those in this embodiment. Figure 4 As shown, those skilled in the art can also set the structure of the connection seat 130 that is connected to the filter element according to the actual filter element structure and model. Among them, the connection seat 130 is provided with a communication hole that is connected to the first pipeline 110 and the second pipeline 120 respectively, and the position of the communication hole can be set according to the water inlet and outlet passage structure of the filter element.

[0069] In this embodiment Figure 3 , Figure 4Taking the structure of the middle connecting seat 130 as an example, the connecting hole connected to the first pipeline 110 can be set at the top of the connecting seat 130, so that the inlet and outlet water can flow between the first pipeline 110 and the inner layer of the filter element; the connecting hole connected to the second pipeline 120 can be set on the side wall of the connecting seat 130, so that the inlet and outlet water can flow between the first pipeline 110 and the outer layer of the filter element. A water filter unit is arranged between the inner layer of the filter element and the outer layer of the filter element to facilitate filtering and purifying water. The working principle of the filter head 100 connecting with the filter element and realizing filtration is: raw water enters from the interface of the first pipeline 110, enters the inner layer of the filter element through the connecting hole at the top of the connecting seat 130, enters the outer layer of the filter element after being filtered by the water filter unit, and then flows out from the interface of the second pipeline 120 through the connecting hole on the side wall. Alternatively, raw water enters from the interface of the second pipeline 120, enters the outer layer of the filter element through the connecting hole on the side wall of the connecting seat 130, enters the outer layer of the filter element after being filtered by the water filtering unit, and then flows out from the interface of the first pipeline 110 through the connecting hole on the top.

[0070] In summary, the filter head provided by the utility model can be used to meet the serial and parallel connection of the filter head by multi-stage filtering and water purification equipment through the reasonable setting of the interface, and the standardized interface has a simple structure, small space occupation, strong versatility, and can be suitable for a variety of application occasions.

[0071] In one embodiment, see Figure 1 , further comprising at least one first branch pipe 160 and / or at least one second branch pipe 170, wherein the first branch pipe 160 is integrally arranged with and connected to the first pipeline 110, and the second branch pipe 170 is integrally arranged with and connected to the second pipeline 120.

[0072] In specific implementation, the first branch pipe 160 and the second branch pipe 170 can be used as interface pipes for externally connected inlet and outlet pipes, and can also be externally connected to detection devices, such as pressure sensors, flow sensors, water quality sensors, etc. Preferably, the pipe openings of the first branch pipe 160 and the second branch pipe 170 are provided with external threads or internal threads to facilitate external connection to the inlet and outlet pipes or external detection devices. In addition, the setting position, quantity and structure of the first branch pipe 160 and the second branch pipe 170 can be set according to actual work requirements and are not limited here.

[0073] See also Figure 5The utility model also provides a filter head assembly, including multiple filter heads 100 and buckles 200 for connecting adjacent filter heads 100, the filter head 100 adopts the filter head 100 described in any of the above embodiments; the first interface 140 of the first pipeline 110 of the filter head 100 is fixedly connected to the second interface 150 of the first pipeline 110 of the adjacent filter head 100 through the buckle 200, and the second interface 150 of the second pipeline 120 of the filter head 100 is fixedly connected to the first interface 140 of the second pipeline 120 of the adjacent filter head 100 through the buckle 200; and also includes a sealing assembly 300 for achieving pipeline sealing between adjacent filter heads 100.

[0074] Compared with the traditional method of multiple filter joints being inserted and connected with each other through a variety of connecting joints, the present embodiment, through the above-mentioned arrangement, enables multiple filter heads to be interconnected with only one snap buckle. It has fewer accessories, simple and effective assembly, and low mold manufacturing cost. It can not only adapt to more application occasions, but also effectively reduce the risk of water leakage, especially suitable for large-throughput water purification filtration environments.

[0075] The sealing assembly 300 may adopt, but is not limited to, a sealing groove with a sealing ring, a sealant, a sealing sticker or other existing water pipe sealing structures, and may be specifically configured according to actual sealing requirements. In this embodiment, one or more sets of sealing grooves with sealing ring structures are preferably configured at the interface of each filter head 100 to achieve sealing between pipelines. Specifically, an interface sealing groove 142 is provided on the outer surface of the first interface 140, and the first interface 140 and the second interface 150 are sealed by a sealing ring embedded in the interface sealing groove 142, which has a simple structure and is easy to install.

[0076] To achieve the connection and fixation between the first interface 140 and the second interface 150, as shown in FIG. Figure 5 As shown, in this embodiment, the design between the interface slot structure 151 and the buckle 200 is used to ensure a stable connection.

[0077] See also Figure 4 Specifically, the interface groove structure 151 includes at least one interface card hole 151a and at least one interface snap ring 151b located on the same circumferential surface of the second interface 150, the interface card hole 151a is a hole formed by the outer surface of the second interface 150 passing through the inner cavity, and the interface snap ring 151b is a groove formed by extending the interface card hole 151a toward the inner surface of the second interface 150.

[0078] For further information, see Figure 6 , Figure 7The buckle 200 has a buckle body 210 and two clamping feet 220 extending from the buckle body 210 to both sides, and an annular cavity that can cooperate with the interface positioning groove 141 of the first interface 140 is formed between the two clamping feet 220; the thickness of the buckle 200 gradually decreases from the buckle body 210 to the clamping feet 220.

[0079] In this embodiment, please refer to Figure 8 , Fig. 9 , two interface card holes 151a are provided and correspond to the two card pins 220 respectively, and an avoidance groove 212 is provided at the position of the card buckle body 210 between the two card pins 220, and the avoidance groove 212 is used to accommodate the side wall of the second interface 150 between the two interface card holes 151a to limit the card buckle 200 from being further embedded. In order to further improve the card connection stability between the card buckle 200 and the first interface 140 and the second interface 150, a card block 230 extends outward from the ends of the two card pins 220, and a card ring groove 151c corresponding to the position of the card block 230 extends from the ends of the two interface card rings 151b. When the card buckle 200 is embedded in the interface groove structure 151, the card block 230 is engaged with the card ring groove 151c to limit the circumferential movement of the card buckle 200 at the position of the interface groove structure 151. Through the engagement of the two groups of clamping blocks 230 and the clamping ring groove 151 c and the accommodation of the avoidance through groove 212 and the side wall of the second interface 150 , the buckle 200 can be stably embedded between the first interface 140 and the second interface 150 .

[0080] When the adjacent filter heads 100 are connected, the first interface 140 extends into the inner cavity of the second interface 150, and the clamping foot 220 of the buckle 200 passes through the interface clamping hole 151a and is embedded between the interface clamping ring 151b of the second interface 150 and the interface positioning groove 141 of the first interface 140, so that the first interface 140 and the second interface 150 are fixed. The design of the buckle 200 gradually reducing the thickness allows the annular cavity between the two clamping feet 220 to just clamp the interface positioning groove 141 of the first interface 140, effectively increasing the contact area between the buckle 200 and the first interface 140 and the second interface 150, improving the clamping effect and preventing it from falling off. Please continue to refer to Figure 6Preferably, in order to facilitate the insertion and removal of the buckle 200 and facilitate the installation and removal of the buckle 200 by hand, the buckle body 210 is provided with insertion and removal grooves 211211, and the insertion and removal grooves 211211 can be symmetrically arranged on both sides of the buckle 200. It is not only convenient for fingers to grasp and improve the efficiency of insertion and removal, but also not easy to hurt the hand, and improve safety. Preferably, a plurality of flexible through grooves 213 are also provided on the buckle body 210, and the flexible through grooves 213 can reduce the overall rigidity of the buckle 200 while enhancing the flexibility of the buckle 200 to resist deformation and compression, thereby ensuring the effectiveness of the installation, embedding and removal of the buckle 200 and improving the service life of the buckle 200.

[0081] In one embodiment, the filter head assembly also includes one or more accessories selected from the group consisting of a second blocking member 400, a first blocking member 500, a second connecting member 600, a first connecting member 700, and an internal blocking member 800, so as to realize parallel and / or series connection of the inlet and outlet water channels between multiple filter heads 100; wherein the second blocking member 400 is used to block the first interface 140 of the filter head 100; the first blocking member 500 is used to block the second interface 150 of the filter head 100; the second connecting member 600 is used to connect the external pipeline with the first interface 140 of the filter head 100; the first connecting member 700 is used to connect the external pipeline with the second interface 150 of the filter head 100; and the internal blocking member 800 is used to block the pipeline connection between adjacent filter heads 100.

[0082] Specifically, see Fig.10 , Fig.11 The second blocking member 400 is formed with a blocking inner cavity of a size that can accommodate the first interface 140, and the second blocking member 400 is provided with a blocking groove structure 410 extending from the outer surface to the inner cavity; when the first interface 140 is blocked, the first interface 140 extends into the blocking inner cavity of the second blocking member 400, and the buckle 200 fixes the second blocking member 400 to the first interface 140 through the blocking groove structure 410;

[0083] See also Fig.12 , Fig.13 A blocking positioning groove 510 is formed on the outer surface of the first blocking piece 500, and the first blocking piece 500 extends into the inner cavity of the second interface 150. The clamping foot 220 of the buckle 200 passes through the interface clamping hole 151a and is embedded between the interface clamping ring 151b of the second interface 150 and the blocking positioning groove 510 of the first blocking piece 500, so that the first blocking piece 500 is fixed to the second interface 150.

[0084] In order to reduce the mold opening cost and make each accessory modular and standardized, in this embodiment, the sealing groove structure 410 of the second sealing piece 400 is preferably the same as the interface groove structure 151 of the second interface 150. The main difference between the second sealing piece 400 and the second interface 150 is that the inner cavity of the second sealing piece 400 is not penetrated into a through cavity to block the flow of water, while the inner cavity of the second interface 150 is a through cavity to facilitate the flow of water.

[0085] Therefore, the blocking groove structure 410 may include at least one blocking hole 411 and at least one blocking ring 412 located on the same circumferential surface of the second blocking member 400, wherein the blocking hole 411 is a hole formed by the outer surface of the second blocking member 400 passing through the inner cavity, and the blocking ring 412 is a groove formed by the blocking hole 411 extending toward the inner surface of the second blocking member 400. The specific structural design thereof may refer to the design of the aforementioned interface groove structure 151, and will not be described in detail here.

[0086] Similarly, in this embodiment, the outer surface of the first blocking piece 500 is preferably also formed with a blocking positioning groove 510 having the same structure as the interface positioning groove 141 of the first interface 140, and the outer surface of the second blocking piece 400 can also be formed with a blocking sealing groove 520 having the same structure as the interface sealing groove 142 of the first interface 140, so as to facilitate the buckle 200 to be snapped onto the blocking positioning groove 510, and the sealing ring is embedded into the blocking sealing groove 520.

[0087] See also Fig.14 , Fig.15 In a preferred embodiment, the second connector 600 has a first end and a second end, and the first end and the second end of the second connector 600 are connected to form a connection inner cavity; the first end of the second connector 600 is provided with a second external interface 610 having the same structure as the second interface 150, for connecting with the first interface 140 of the filter head 100; the second end of the second connector 600 is provided with a second threaded structure 620, for threaded connection with an external pipeline. The connection method of the second external interface 610 and the first interface 140 is the same as the connection method of the second interface 150 and the first interface 140, both of which are engaged with the aforementioned buckle 200, and no further details are given here.

[0088] Preferably, the second connecting member 600 also includes a second external connection portion 630 connected between the second external connection interface 610 and the second threaded structure 620, and the second external connection portion 630 is in the shape of a hexagonal nut, so that a hexagonal wrench can be used to act on the second external connection portion 630 to achieve a threaded connection between the second threaded structure 620 and the external pipeline.

[0089] See also Fig.16 , Fig.17The first connector 700 has a first end and a second end, and the first end and the second end of the first connector 700 are connected to form a connection inner cavity; the first end of the first connector 700 is provided with a first external interface 710 having the same structure as the first interface 140, for connecting with the second interface 150 of the filter head 100; the second end of the first connector 700 is provided with a first threaded structure 720, for threaded connection with an external pipe. The connection method of the first external interface 710 and the second interface 150 is the same as the connection method of the first interface 140 and the second interface 150, both of which are engaged with the aforementioned buckle 200, and no further details are given here.

[0090] Preferably, the first connecting member 700 also includes a first external connection portion 730 connected between the first external connection interface 710 and the first threaded structure 720, and the first external connection portion 730 is in the shape of a hexagonal nut, so that a hexagonal wrench can be used to act on the first external connection portion 730 to achieve a threaded connection between the first threaded structure 720 and the external pipe.

[0091] In other preferred embodiments, see Fig.18 , Fig.19 The internal sealing member 800 can be embedded in the first interface 140, and a plurality of annular sealing grooves 810 are provided on the outer surface of the internal sealing member 800. The pipeline of the adjacent filter head 100 is sealed between the internal sealing member 800 and the first interface 140 by a sealing seal 820 embedded in the annular sealing groove 810.

[0092] It should be noted that the second blocking member 400, the first blocking member 500, the second connecting member 600, the first connecting member 700, and the internal blocking member 800 are not limited to the above-mentioned structural design, nor are they limited to the attached Figure 10~Figure 19 As shown, those skilled in the art can make corresponding replacements to the above structure according to actual needs to satisfy functions such as blocking, connecting or sealing, which all fall within the protection scope of the present utility model.

[0093] In other preferred implementations, the filter head assembly also includes a support frame (not shown in the figure) for installing the filter head 100 and the filter element. The support frame is arranged below the filter head 100, and includes positioning holes or positioning grooves for installing and positioning the filter head 100 and the filter element, and also includes mounting holes for connecting to other equipment, etc. The specific design can be based on actual needs and is not limited here.

[0094] The application of the various accessories of the above filter head assembly can effectively realize multiple combinations such as series and / or parallel connection of the filter head inlet and outlet water channels. The following takes the series and parallel connection of four filter heads connected to four filter elements as an example. Please refer to Fig.24 , Fig.25and Figure 26~Figure 32 And provide detailed solution description in combination with specific application scenarios.

[0095] It should be noted that the combination of the following inlet and outlet waterways is applicable to waterway connections of two or more stages, that is, it is applicable to more than two filter elements in series and parallel. Although the following embodiments only take four filter elements as an example for four-stage splicing, those skilled in the art can realize not only four-stage splicing but also unlimited-stage splicing according to actual needs. And the interface positions of each inlet and outlet water can be connected to the external pipeline by using the corresponding first connecting member 700 or the second connecting member 600, or the corresponding first blocking member 500 or the second blocking member 400 to achieve blocking to cut off conduction, which can be set according to actual work needs and is not limited here.

[0096] In addition, the direction of the inlet and outlet water flow of each of the following schemes can be achieved by setting a water circuit switching component 900 at the filter element to achieve reverse water inlet and outlet, for example, switching the first pipe 110 for water inlet and the second pipe 120 for water outlet of the filter head 100 to the second pipe 120 for water inlet and the first pipe 110 for water outlet of the filter head 100. Specifically, the filter head assembly of this embodiment also includes a water circuit switching component 900, and the water circuit switching component 900 is arranged between the filter element and the connecting seat 130 to switch the inlet and outlet directions of the first pipe 110 and the second pipe 120. The water circuit switching component 900 includes a first switching component 910 and a second switching component 920, please refer to Fig. 20 , Fig.21 The first switching member 910 is used to connect the first pipeline 110 to the inner layer of the filter element and to connect the second pipeline 120 to the outer layer of the filter element. Fig. 22 , Fig.23 The second switching member 920 is used to connect the first pipeline 110 with the outer layer of the filter element and the second pipeline 120 with the inner layer of the filter element. Of course, according to this concept, those skilled in the art can also replace the water circuit switching member 900 of this embodiment that can switch the water inlet and outlet directions with other conventional water circuit switching members in the prior art, and the replaced structures all fall within the protection scope of the present utility model.

[0097] Solution 1: Parallel water inlet, multi-channel water outlet combination

[0098] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.26As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200 to form a parallel water inlet channel; the second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the second pipelines 120 of adjacent filter heads 100 are separated by internal plugging parts 800 to form multiple water outlets. Among them, the filter head 100 located in the middle can outlet water through the second branch pipe 170, and the filter heads 100 located at both ends can outlet water through their respective second pipeline 120 interfaces. The filter elements corresponding to the four filter heads 100 are all set to inlet water from the first pipeline 110 and outlet water from the second pipeline 120 through the water channel switching part 900.

[0099] Its working principle is that raw water enters in parallel from the first pipelines 110 of the connected filter heads 100, is filtered by each filter element, and then flows out from the second pipeline 120 of each filter head 100 to achieve multi-way water outlet; that is, one way of water inlet and four ways of water outlet are achieved.

[0100] According to the above-mentioned combination of multi-stage parallel water inlet and multi-channel water outlet, those skilled in the art can wirelessly expand it into at least two levels of wireless splicing to be suitable for water filtration environments with different needs, so as to achieve multiple uses of one machine.

[0101] Solution 2: Multiple water inlets and parallel water outlets

[0102] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig. 27 As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the first pipelines 110 of adjacent filter heads 100 are separated by internal plugging parts 800 to form multiple water inlets; wherein, the filter head 100 located in the middle can be inlet through the first branch pipe 160, and the filter heads 100 at both ends can be inlet through their respective first pipeline 110 interfaces. The second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200 to form parallel water outlet channels. The filter elements corresponding to the four filter heads 100 are all set to the first pipeline 110 for water inlet and the second pipeline 120 for water outlet through the water channel switching part 900.

[0103] Its working principle is that raw water enters from multiple second pipes 120 of each filter head 100, is filtered by each filter element, and then is discharged in parallel through the first pipes 110 of each connected filter head 100; that is, four water inlets and one water outlet are realized.

[0104] According to the above-mentioned combination of multi-level and multi-path water inlet and parallel water outlet, those skilled in the art can wirelessly expand it into at least two levels of wireless splicing to be applicable to water filtration environments where different water sources are used, thus achieving multiple uses of one machine.

[0105] Solution 3: Single water inlet, parallel water outlet, secondary filtration combination

[0106] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.28 As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the first pipelines 110 of the first filter head 100 and the second filter head 100 are separated by an internal plugging member 800 so that only the first pipeline 110 of the first filter head 100 is a water inlet channel, and the first pipelines 110 of the remaining filter heads 100 are water outlet channels. The second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200. Among them, the filter element corresponding to the first filter head 100 is set to the first pipeline 110 for water inlet and the second pipeline 120 for water outlet through the water channel switching member 900; the filter elements corresponding to the remaining filter heads 100 are set to the second pipeline 120 for water inlet and the first pipeline 110 for water outlet through the water channel switching member 900.

[0107] Its working principle is that raw water enters from the first pipeline 110 of the first filter head 100, flows out from the second pipeline 120 of the first filter head 100 after being filtered by the first filter element, so as to realize the initial raw water filtration; then enters the second filter element, the third filter element, and the fourth filter element through the second pipeline 120 of the second filter head 100, the second pipeline 120 of the third filter head 100, and the second pipeline 120 of the fourth filter head 100 for filtration, and then flows out from the first pipeline 110 of the second filter head 100, the first pipeline 110 of the third filter head 100, and the first pipeline 110 of the fourth filter head 100 to realize high-precision secondary filtration. That is, one way of water inlet, multiple ways of water outlet, and secondary filtration are realized.

[0108] According to the above-mentioned combination of multi-stage single-channel water inlet and parallel water outlet, technicians in this field can wirelessly expand it into at least two levels of wireless splicing. Its internal blocking part 800 can be set between the first pipeline 110 of any adjacent filter head 100 to be suitable for water filtration environments with different water outlet requirements, so as to achieve multiple water outlets from one machine and increase the water output in parallel.

[0109] Solution 4: Parallel water inlet, multiple water outlets, secondary filtration combination

[0110] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.29As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the first pipelines 110 of the third filter head 100 and the fourth filter head 100 are separated by an internal plugging member 800 so that only the first pipelines 110 of the first three filter heads 100 are water inlet channels, and the first pipeline 110 of the fourth filter head 100 is a water outlet channel. The second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200. Among them, the filter elements corresponding to the first three filter heads 100 are set to the first pipeline 110 for water inlet and the second pipeline 120 for water outlet through the water circuit switching member 900; the filter element corresponding to the last filter head 100 is set to the second pipeline 120 for water inlet and the first pipeline 110 for water outlet through the water circuit switching member 900.

[0111] Its working principle is that raw water enters from the first pipeline 110 of the first three filter heads 100, flows out from the second pipeline 120 of the first three filter heads 100 after being filtered by the filter element, so as to realize the initial raw water filtration; then enters the last filter element through the second pipeline 120 of the last filter head 100 for filtration, and then flows out from the first pipeline 110 of the last filter head 100 to realize high-precision secondary filtration; that is, it realizes multi-way water inlet, one-way water outlet, and secondary filtration.

[0112] According to the above-mentioned combination of multi-stage parallel water inlet and multi-channel water outlet, technicians in this field can wirelessly expand it into at least two levels of wireless splicing. Its internal blocking part 800 can be set between the first pipeline 110 of any adjacent filter head 100 to be suitable for water filtration environments with different water outlet requirements, so as to achieve multiple water inlets for one machine and increase the water inlet volume in parallel.

[0113] Solution 5: Parallel water inlet, parallel water outlet, secondary filtration combination

[0114] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.30As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the first pipelines 110 of the second filter head 100 and the third filter head 100 are separated by an internal plugging member 800 so that only the first pipelines 110 of the first two filter heads 100 are water inlet channels, and the first pipelines 110 of the last two filter heads 100 are water outlet channels. The second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200. Among them, the filter elements corresponding to the first two filter heads 100 are set to the first pipeline 110 for water inlet and the second pipeline 120 for water outlet through the water circuit switching member 900; the filter elements corresponding to the last two filter heads 100 are set to the second pipeline 120 for water inlet and the first pipeline 110 for water outlet through the water circuit switching member 900.

[0115] Its working principle is that raw water enters from the first pipeline 110 of the first two filter heads 100, flows out from the second pipeline 120 of the first two filter heads 100 after being filtered by the filter element, so as to realize the initial raw water filtration; then enters the last two filter elements through the second pipeline 120 of the last two filter heads 100 for filtration, and then flows out from the first pipeline 110 of the last two filter heads 100 to realize high-precision secondary filtration; that is, it realizes multi-way water inlet, multi-way water outlet, and secondary filtration.

[0116] According to the above-mentioned combination of multi-stage parallel water inlet, parallel water outlet, and secondary filtration, technical personnel in this field can wirelessly expand it into at least two or more stages of wireless splicing, and its internal blocking piece 800 can be set between the first pipeline 110 of any adjacent filter head 100 to be suitable for large-flow water filtration environment, solve the problem of insufficient flow of a single machine, and realize parallel water inlet, parallel water outlet and secondary filtration with increased flow of one machine.

[0117] Solution 6: Parallel water inlet and parallel water outlet combination

[0118] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.31 As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200 to form a parallel water inlet channel; the second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200 to form a parallel water outlet channel. The filter elements corresponding to the four filter heads 100 are all set to the first pipeline 110 for water inlet and the second pipeline 120 for water outlet through the water channel switching member 900.

[0119] Its working principle is that raw water enters in parallel from the first pipelines 110 of the connected filter heads 100, is filtered by each filter element, and then is discharged in parallel through the second pipelines 120 of each filter head 100; that is, one way of water inlet and one way of water outlet are achieved to increase the flow rate.

[0120] According to the above-mentioned combination of multi-stage parallel water inlet, parallel water outlet, and secondary filtration, technical personnel in this field can wirelessly expand it into at least two or more stages of wireless splicing, and its internal blocking piece 800 can be set between the first pipeline 110 of any adjacent filter heads 100, so as to be suitable for conventional parallel water inlet and outlet water filtration environment, and realize parallel water inlet and parallel water outlet with increased flow rate of one machine.

[0121] Solution 7: Single water inlet, series outlet, multi-stage filtration

[0122] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.32 As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the first pipelines 110 of the first filter head 100 and the second filter head 100 are separated by an internal plugging member 800. The second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the second pipelines 120 of other adjacent filter heads 100 except the position between the first filter head 100 and the second head are separated by an internal plugging member 800. Among them, the filter element corresponding to the first filter head 100 is set to have water inlet through the first pipe 110 and water outlet through the second pipe 120 through the water circuit switching component 900; the filter element corresponding to the second filter head 100 is set to have water inlet through the second pipe 120 and water outlet through the first pipe 110 through the water circuit switching component 900; the filter element corresponding to the third filter head 100 is set to have water inlet through the first pipe 110 and water outlet through the water circuit switching component 900; the filter element corresponding to the fourth filter head 100 is set to have water inlet through the second pipe 120 and water outlet through the water circuit switching component 900, and the first pipe 110, and so on.

[0123] Its working principle is that raw water enters from the first pipe 110 of the first filter head 100 and flows out from the second pipe 120 of the first filter head 100 after being filtered by the first filter element, so as to realize the initial raw water filtration; then enters the second filter element through the second pipe 120 of the second filter head 100 for filtration and flows out from the first pipe 110 of the second filter head 100, so as to realize high-precision secondary filtration; then enters the third filter element through the first pipe 110 of the third filter head 100 for filtration and flows out from the second pipe 120 of the third filter head 100, so as to realize the third filtration; finally, enters the fourth filter element through the second pipe 120 of the fourth filter head 100 for filtration and flows out from the first pipe 110 of the fourth filter head 100, so as to realize the fourth filtration; that is, single-way water inlet, series water outlet, and four-stage filtration are realized.

[0124] According to the above-mentioned combination of single-way water inlet, serial water outlet, and multi-stage filtration, technicians in this field can wirelessly expand it into at least two levels of wireless splicing to be suitable for conventional multi-stage water filtration environments to achieve serial water inlet and outlet requirements.

[0125] Solution 8: Series-parallel water outlet combination

[0126] This solution takes four filter heads connected to four filter elements as an example. Please refer to Fig.33 As shown, the first pipelines 110 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the first pipelines 110 of the first filter head 100 and the second filter head 100 are separated by an internal plugging member 800. The second pipelines 120 of the four filter heads 100 are connected in sequence by fixing the first joint and the second joint with the buckle 200, and the second pipelines 120 between the second filter head 100 and the third filter head 100 are separated by an internal plugging member 800. Among them, the filter element corresponding to the first filter head 100 is set to have water inlet through the first pipe 110 and water outlet through the second pipe 120 through the water circuit switching component 900; the filter element corresponding to the second filter head 100 is set to have water inlet through the second pipe 120 and water outlet through the first pipe 110 through the water circuit switching component 900; the filter elements corresponding to the third filter head 100 and the fourth filter head 100 are both set to have water inlet through the first pipe 110 and water outlet through the second pipe 120 through the water circuit switching component 900.

[0127] Its working principle is that raw water enters from the first pipeline 110 of the first filter head 100 and flows out from the second pipeline 120 of the first filter head 100 after being filtered by the first filter element, so as to realize the initial raw water filtration; then enters the second filter element through the second pipeline 120 of the second filter head 100 for filtration and flows out from the first pipeline 110 of the second filter head 100, so as to realize high-precision secondary filtration; then enters the third filter element and the fourth filter element through the first pipeline 110 of the third filter head 100 and the fourth filter head 100 respectively for filtration and flows out from the second pipeline 120 of the third filter head 100 and the second pipeline 120 of the fourth filter head 100 respectively, so as to realize three-time filtration; that is, single-way water inlet, parallel water outlet, and three-stage series filtration are realized.

[0128] According to the above-mentioned series-parallel water outlet combination method, those skilled in the art can wirelessly expand it into at least two levels of wireless splicing to be suitable for conventional multi-stage water filtration environments and realize parallel large-flow water outlet requirements.

[0129] In summary, the filter head assembly provided by the utility model can meet the needs of various environments with different water filtration requirements by matching fewer accessories and water channel switching parts. It has strong versatility, a wide range of applications, and good application prospects.

[0130] The utility model also provides a water purification device, which uses the filter head 100 as described in any embodiment, or uses the filter head assembly as described in any embodiment, and also includes at least one filter element detachably connected to the connecting seat 130. The filter element can adopt a conventional filter element structure on the market according to actual work requirements, and will not be described in detail here. The specific implementation and function of the filter head 100 and the filter head assembly can be referred to above, and will not be described in detail here.

[0131] In summary, compared with the prior art, the filter head, filter head assembly and water purification equipment provided by the utility model have the following advantages:

[0132] 1. The interfaces of various accessories of the filter head assembly are standardized structures with strong applicability and simple processing, which can effectively reduce the cost of mold opening, manufacturing and maintenance;

[0133] 2. The connection between the various accessories of the filter head assembly does not require additional connecting parts. The connection can be completed by using buckles and sealing components, thereby effectively reducing the risk of water leakage;

[0134] 3. Only a few accessories are needed to complete the water circuit series or parallel use between complex multi-stage filter elements, which can meet the needs of different water filtration environments and is suitable for more applications, especially large flow and multi-purpose occasions, with strong versatility;

[0135] 4. It has a simple structure, occupies little space, is easy to install and disassemble, and has high efficiency, and has good application prospects.

[0136] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the utility model can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0137] Although this article uses more terms such as filter head, first pipeline, second pipeline, connecting seat, first interface, second interface, interface positioning groove, interface groove structure, interface card hole, interface clamping ring, first branch pipe, second branch pipe, buckle, sealing assembly, buckle body, card foot, plug-in groove, avoidance groove, flexible groove, interface sealing groove, second blocking member, first blocking member 500, second connecting member, first connecting member, internal blocking member, blocking groove structure, blocking card hole, blocking clamping ring, blocking positioning groove, blocking sealing groove, second external interface, second threaded structure, second external part, first external interface, first threaded structure, first external part, annular sealing groove, blocking seal, block, clamping ring groove, water channel switching member and the like, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A filter head, characterized in that: It comprises a first pipeline, a second pipeline and a connection seat for connecting with a filter element, wherein the first pipeline and the second pipeline are respectively connected with the connection seat; The first pipeline and the second pipeline are respectively formed with a first interface and a second interface at two opposite ends thereof, and an interface positioning groove is provided on the outer surface of the first interface; the second interface is formed with an interface inner cavity that can accommodate the size of the first interface, and the second interface is provided with an interface groove structure extending from the outer surface to the inner cavity; The first interface of the first pipeline and the second interface of the second pipeline are oriented in the same direction, and the second interface of the first pipeline and the first interface of the second pipeline are oriented in the same direction.

2. The filter head according to claim 1, characterized in that: It also includes at least one first branch pipe and / or at least one second branch pipe, wherein the first branch pipe is integrally arranged with and communicated with the first pipeline, and the second branch pipe is integrally arranged with and communicated with the second pipeline.

3. A filter head assembly, characterized in that: It comprises a plurality of filter heads and buckles for connecting adjacent filter heads, wherein the filter head adopts the filter head as claimed in claim 1 or 2; the first interface of the first pipeline of the filter head and the second interface of the first pipeline of the adjacent filter head are fixedly connected through the cooperation of the buckle and the interface groove structure, and the second interface of the second pipeline of the filter head and the first interface of the second pipeline of the adjacent filter head are fixedly connected through the cooperation of the buckle and the interface groove structure; It also includes a sealing assembly for achieving pipeline sealing between adjacent filter heads.

4. The filter head assembly according to claim 3, characterized in that: The interface groove structure includes at least one interface card hole and at least one interface snap ring located on the same circumferential surface of the second interface, the interface card hole is a hole formed by the outer surface of the second interface passing through the inner cavity of the interface, and the interface snap ring is a groove formed by extending the interface card hole toward the inner surface of the second interface.

5. The filter head assembly according to claim 4, characterized in that: The buckle comprises a buckle body and two clamping feet extending from the buckle body to two sides, and a ring cavity is formed between the two clamping feet, which can be matched with the interface positioning groove of the first interface; the buckle is gradually thinned from the buckle body to the clamping feet; When the adjacent filter heads are connected, the first interface extends into the inner cavity of the second interface, the clip foot passes through the interface clip hole and is embedded between the interface clip ring of the second interface and the interface positioning groove of the first interface, so that the first interface and the second interface are fixed.

6. The filter head assembly according to claim 5, characterized in that: The filter head assembly further includes one or more accessories selected from the group consisting of a second blocking member, a first blocking member, a second connecting member, a first connecting member, and an internal blocking member, so as to realize parallel and / or series connection of the inlet and outlet waterways between the plurality of filter heads; The second blocking member is used to block the first interface of the filter head; The first blocking member is used to block the second interface of the filter head; The second connecting member is used to connect the external pipe with the first interface of the filter head; The first connecting member is used to connect the external pipeline with the second interface of the filter head; The internal plugging member is used to plug the pipeline communication between adjacent filter heads.

7. The filter head assembly according to claim 6, characterized in that: The second blocking member is formed with a blocking inner cavity having a size that can accommodate the first interface, and the second blocking member is provided with a blocking groove structure extending from the outer surface to the inner cavity; when the first interface is blocked, the first interface extends into the blocking inner cavity of the second blocking member, and the buckle fixes the second blocking member to the first interface through the blocking groove structure; A sealing positioning groove is provided on the outer surface of the first sealing piece, and the first sealing piece extends into the inner cavity of the second interface. The clip foot passes through the interface clip hole and is embedded between the interface clip ring of the second interface and the sealing positioning groove of the first sealing piece, so that the first sealing piece is fixed to the second interface.

8. The filter head assembly according to claim 6, characterized in that: The second connecting member has a first end and a second end, and the first end and the second end of the second connecting member are connected to form a connecting inner cavity; the first end of the second connecting member is provided with a second external connection interface having the same structure as the second interface, so as to be connected to the first interface of the filter head; the second end of the second connecting member is provided with a second threaded structure, so as to be threadedly connected to the external pipe; The first connecting member has a first end and a second end, and the first end and the second end of the first connecting member are connected to form a connecting inner cavity; the first end of the first connecting member is provided with a first external interface structure that is the same as the first interface structure, so as to be connected to the second interface of the filter head; the second end of the first connecting member is provided with a first threaded structure, so as to be threadedly connected to the external pipe.

9. The filter head assembly according to claim 6, characterized in that: The internal sealing member can be embedded in the first interface, and a plurality of annular sealing grooves are provided on the outer surface of the internal sealing member. The pipeline of the adjacent filter head is sealed between the internal sealing member and the first interface by a sealing seal embedded in the annular sealing groove.

10. A water purification device, characterized in that: The filter head as described in claim 1 or 2, or the filter head assembly as described in any one of claims 3 to 9, further comprises at least one filter element detachably connected to the connecting seat.

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