Filter cartridge device and water treatment apparatus

Abstract

The utility model discloses a filter core device and water treatment facilities. The filter core device includes filter core main part, the filter core main part is provided with the first communication part for with host waterway intercommunication, the first communication part sets up in the side surface of filter core main part, the filter core main part has fixed end, and the end face of fixed end is provided with locking connection portion, and the locking connection portion is used for with the locking piece of host cooperation and is connected to lock filter core main part in host and makes first communication department and host waterway intercommunication. Filter core device passes through the first communication department of its side surface and is communicated with host, then passes through the locking piece on host and the fixed end of filter core device and is connected, in the process of assembling, does not need to twist or rotate to filter core device, and the installation is convenient, and the situation that it is not easy to appear and is stuck.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to a filter cartridge device and water treatment equipment. Background Technology

[0002] During the use of water purification equipment, the internal filter element is a consumable. After a certain period of use, the filter element needs to be replaced to ensure the water purification effect. The connection of the traditional filter element is usually set on the end face of the filter element. During installation, it is installed by rotating or screwing. The installation process requires force to turn the filter element, which is relatively troublesome. The rotating structure may also get stuck. Utility Model Content

[0003] To address the problems in existing technologies where rotating and snapping the filter cartridge during replacement is cumbersome and may cause jamming, this invention provides a filter cartridge device and water treatment equipment.

[0004] The filter element device provided in this application includes a filter element body, the filter element body being provided with a first connecting part for water circuit communication with a host, the first connecting part being provided on the side of the filter element body; the filter element body having a fixed end, the end face of the fixed end being provided with a locking connection part, the locking connection part being used to cooperate with the locking member of the host to lock the filter element body to the host and to connect the first connecting part with the water circuit of the host.

[0005] In some embodiments, the locking connection is configured as a fitting groove, wherein at least a portion of the locking member is embedded in the fitting groove when the locking member of the host is connected to the fixed end;

[0006] Alternatively, the locking connection may be a protrusion that allows the locking member to hook or be fitted.

[0007] In some embodiments, the fixed end is used for the locking member of the host to be sleeved, and the fitting groove is used for at least a portion of the locking member to be embedded in the fitting groove when the locking member of the host is sleeved with the fixed end.

[0008] The fitting groove has a predetermined depth, and the fitting groove is used for the locking part of the host to be partially or completely embedded in the end face of the fixed end in the depth direction.

[0009] In some embodiments, the two ends of the fitting groove are connected to the side of the fixed end, the groove opening edge of the fitting groove is provided with a rounded corner structure or a chamfered structure, and the corner where the fitting groove is connected to the side of the fixed end is provided with a clearance structure for avoiding the locking member of the host.

[0010] In some embodiments, the side of the fixed end is provided with a sleeve portion for the host locking component to fit into, and the shape and size of the sleeve portion are the same as the shape and size of the sleeve interface of the host locking component.

[0011] And / or, the side of the fixed end is provided with two opposing and parallel planes, the two planes being used to fit against the opposite sides of the sleeve interface of the locking member;

[0012] The relative distance between the two planes is L5, L5≥66mm, and the height of the planes along the direction from the other end of the filter device to the fixed end is L4, L4≥10mm.

[0013] In some embodiments, the axial direction of the filter element body is set to the vertical direction, and the end where the fixed end is located is the upper end of the filter element body;

[0014] Along the vertical direction, the height of the socket is lower than or equal to the height of the first connecting portion.

[0015] The water treatment equipment provided in this application includes the above-mentioned filter cartridge device and a main unit. The main unit includes a body and a locking member. The body is provided with a second connecting part for water communication with the filter cartridge device. The locking member is rotatably or slidably disposed on the body. The locking member is used to cooperate with the locking connection part of the filter cartridge device to lock the filter cartridge body to the body and connect the first connecting part with the second connecting part.

[0016] In some embodiments, the locking member is provided with a socket for engaging with the fixed end;

[0017] The locking connection part is configured as a fitting groove. When the locking member is sleeved with the fixed end, the locking member is at least partially used to embed into the fitting groove of the fixed end.

[0018] The locking member has a locked state that can be rotated or slid to engage with the fixed end, and the locking member also has an unlocked state that can be reset to disengage from the fixed end.

[0019] In some embodiments, the locking element includes a collar for fitting around the outside of the fixed end and a locking strip for embedding in the fitting groove, the locking strip being connected to the collar or being an integral structure.

[0020] In some embodiments, the collar has a U-shaped structure, including a horizontal part and a vertical part, with the two ends of the horizontal part connected to the vertical part to form the U-shaped structure, and the two vertical parts are rotatably connected to the machine body;

[0021] When the locking member is in the locked state, the two vertical portions are positioned close to each other on one side and are respectively used to fit against the two planes of the fixed end.

[0022] Compared with the prior art, the filter element device provided by this utility model has the following advantages: When the filter element device provided by this application is installed on the main unit, it is connected to the main unit through a first connecting part located on its side, and the direction of water connection with the main unit is also lateral. Therefore, during installation, the filter element device is connected to the main unit through the first connecting part on its side, and then connected to the fixed end of the filter element device through the locking member on the main unit, thereby fixing the filter element. Obviously, during the assembly process, the filter element device provided by this application does not require twisting or rotating, making installation convenient and less prone to jamming. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the locking element in a locked state in one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the overall structure of the locking element in the unlocked state in one embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure in one embodiment of this application where the locking element and the filter element are disassembled;

[0026] Figure 4 This is a side view of one embodiment of this application;

[0027] Figure 5 This is a top view of one embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the planar structure along the X direction in one embodiment of the locking member provided in this application.

[0029] 100. Filter element body; 11. Fixed end; 111. Locking connection part; 112. Sleeve part; 113. Plane; 12. Locking element; 01. Rounded corner structure; 02. Avoidance structure; 101. First connecting part; 200. Body; 201. Second connecting part; 300. Locking element; 31. Collar; 311. Horizontal part; 312. Vertical part; 32. Locking strip; 301. Sleeve interface; X. First direction; 03. Fitting groove; 04. Water flow channel. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. 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 orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] like Figure 1 , Figure 2 , Figure 3 The filter element device shown includes a filter element body 100, which has a first connecting portion 101 for water communication with a main unit. The first connecting portion 101 is located on the side of the filter element body 100. The filter element body 100 has a fixed end 11, and a locking connection portion 111 is provided on the end face of the fixed end 11. The locking connection portion 111 is used to cooperate with the locking member 300 of the main unit to lock the filter element body 100 to the main unit and to connect the first connecting portion 101 with the water circuit of the main unit.

[0037] Please refer to it again. Figure 1 , Figure 2 , Figure 3The first connecting portion 101 is disposed on the side of the fixed end 11, and the first connecting portion 101 is connected along the first direction X, which is angled to the axial direction of the filter element body 100. Through the above design, when the filter element device provided in this application is installed on the host, it is connected to the host via the first connecting portion 101 located on its side, and the direction of the water connection with the host is also lateral. Therefore, during installation, the filter element device provided in this application first connects to the host via the first connecting portion 101 on its side, and then connects to the locking connection portion 111 of the fixed end 11 of the filter element device via the locking member 300 on the host, thereby fixing the filter element. It is obvious that the filter element device provided in this application does not require twisting or rotating during assembly, making installation convenient and less prone to jamming.

[0038] In some implementations, such as Figure 1 , Figure 2 As shown, the locking connection part 111 is configured as a fitting groove 03. The fitting groove 03 is used so that at least a portion of the locking member 300 is embedded in the fitting groove 03 when the locking member 300 of the main unit is connected to the fixed end 11. With this design, the locking member 300 is fixed by being embedded in the end face of the fitting groove 03, so that the filter element device does not need to be rotated during the assembly process, which is very convenient to operate.

[0039] It is understood that in some other embodiments, the locking connection portion may also be a protrusion for the locking member to hook or sleeve.

[0040] In some embodiments, the fixed end 11 is used for the locking member 300 of the host to be sleeved, and the fitting groove 03 is used for at least a portion of the locking member 300 to be embedded in the fitting groove 03 when the locking member 300 of the host is sleeved with the fixed end 11.

[0041] like Figure 1 , Figure 2 As shown, a portion of the locking member 300 is sleeved on the outside of the fixed end 11, and the other portion is embedded in the fitting groove 03, so that the locking member 300 can not only fix the filter element device from the outside of the fixed end 11, but also fix the filter element device from the inside of the fixed end 11, which can enhance the fixing effect of the locking member 300 on the filter element.

[0042] Furthermore, such as Figure 4 As shown, the above-mentioned fitting groove 03 has a predetermined depth, and the fitting groove 03 is used for the insertion portion of the locking member 300 of the host to be partially or completely embedded in the end face of the fixed end 11 in the depth direction.

[0043] like Figure 4 As shown, when the locking member 300 is sleeved with the fixed end 11, along the embedding direction of the locking member 300, the top of the locking member 300 can be completely embedded below the end face of the fixed end 11. Figure 4 L2 in the figure represents the depth of the top of the locking member 300 embedded in the end face of the fixing end 11. This design ensures that the locking member 300 can effectively maintain its position after being embedded in the end face.

[0044] In some other implementations, such as Figure 1 , Figure 2 As shown, the two ends of the fitting groove 03 are connected to the side of the fixed end 11. The edge of the groove 03 is provided with a rounded corner structure 01 or a chamfered structure. At the corner where the fitting groove 03 connects to the side of the fixed end 11, a clearance structure 02 is provided to avoid the locking member 300 of the host. During the process of the locking member 300 being fitted onto the fixed end 11, the rounded corner structure 01 or chamfered structure and the clearance structure 02 can guide and avoid the part of the locking member 300 embedded in the end face, thus avoiding structural conflict between the locking member 300 and the fixed end 11.

[0045] In some other implementations, such as Figure 3 As shown, the aforementioned fitting groove 03 and the first connecting portion 101 are arranged opposite each other along the first direction X, and the first direction X is perpendicular to the extending direction of the fitting groove 03. Furthermore, the first connecting portion 101 has a water flow channel 04 for water connection with the host machine, and the distance between the ports of the fitting groove 03 and the water flow channel 04 is L3, where 15mm≤L3≤90mm.

[0046] In some implementations, such as Figure 1 , Figure 2 , Figure 5 As shown, the side of the fixed end 11 is provided with a sleeve portion 112 for the main unit locking member 300 to fit into. The shape and size of the sleeve portion 112 are the same as the shape and size of the socket interface 301 of the main unit locking member 300. It should be noted that the sleeve portion 112 is the contact part between the locking member 300 and the fixed end 11 after the locking member 300 is fitted onto it, and the socket interface 301 is the opening on the locking member 300 for fitting the fixed end 11. With the above design, when the locking member 300 is fitted onto the sleeve portion 112 of the fixed end 11, the locking member 300 and the sleeve portion 112 can be in a relatively close fit, thereby making it less likely for the filter element device to shake after it is fitted onto the locking member 300, ensuring the stability of the filter element device after it is connected and connected to the main unit.

[0047] In some implementations, such as Figure 2 , Figure 5As shown, the side of the fixed end 11 is provided with two opposing and parallel planes 113, which are used to fit against the opposite sides of the sleeve interface 301 of the locking member 300. With the above design, when the sleeve part 112 is used to fit the locking member 300, the fitting effect between the planes 113 and the sleeve interface 301 of the locking member 300 can prevent the filter element device from rotating in the circumferential direction, further strengthening the fixation of the filter element device in position.

[0048] In some other implementations, such as Figure 3 , Figure 5 As shown, the relative distance between the two planes 112 is L5, where L5 ≥ 66 mm. Furthermore, along the direction (Y direction) from the other end of the filter element device to the fixed end 11, the height of the two planes 112 is L4, where L4 ≥ 10 mm.

[0049] In some other implementations, such as Figure 1 , Figure 2 As shown, the fixed end 11 is also provided with a locking member 12 for locking the main unit 300 to the sleeve part 112. The locking member 12 includes a locked state and an avoidance state. In practical applications, the locking member 12 can be a movable latch. When the locking member 12 is in the locked state, the locking member 300 can be locked to the sleeve part 112, so that the locking member 300 can always maintain the sleeve state with the fixed end 11 and will not be disengaged from the fixed end 11 due to vibration or other non-human subjective factors, further ensuring the stability of the filter element device after it is assembled onto the main unit. If it is necessary to disassemble the filter element device, the locking member 12 can be adjusted from the locked state to the avoidance state by pressing, flicking, etc., so that the locking member 300 will not be locked. The locking member 300 can be disengaged from the fixed end 11 by sliding or rotating.

[0050] It is understood that the aforementioned movable latch may have a spring or a spring plate, which can maintain the movable latch in the locked state. During the process of the locking member 300 moving to the sleeve portion 112, the distal end of the locking member 300 along its moving direction can abut against the movable latch, causing the movable latch to change from the locked state to the avoidance state. When the locking member 300 moves to the sleeve portion 112, the locking member 300 disengages from the movable latch, and the movable latch returns to the locked state under the action of the spring or spring plate. In the locked state, the movable latch will abut against the locking member 300 to prevent the locking member 300 from moving in the direction of disengaging from the sleeve portion 112. Through the above design, the locking member 300 is automatically locked during the process of the locking member 300 moving to the sleeve portion 112, improving the ease of use.

[0051] In some embodiments, the axial direction of the filter element body 100 is set to the vertical direction (i.e., Figure 1 , Figure 6In the Y direction), the end where the fixed end 11 is located is the upper end of the filter element body 100. In the vertical direction, the height of the sleeve portion 112 is lower than or equal to the height of the first connecting portion 101. It should be noted that... Figure 6 In the diagram, line M represents the height of the second connecting portion 201 in the Y direction. Since the second connecting portion 201 and the first connecting portion 101 are at the same height in the Y direction after the filter element is assembled onto the main unit, line M can also represent the height of the first connecting portion 101 in the Y direction; similarly, Figure 6 In the diagram, line N represents the height in the Y direction when the locking member 300 locks the filter element device. Since the locking member 300 is positioned at the sleeve portion 112 when locking the filter element device, line N can also represent the height in the Y direction of the sleeve portion 112. Therefore, the distance L1 between line M and line N represents the height difference between the sleeve portion 112 and the first connecting portion 101. It can be understood that after the locking member 300 is sleeved with the fixed end 11, it prevents the first connecting portion 101 from detaching from the main unit by blocking the side of the filter element device away from the first connecting portion 101. Through this design, the abutting part of the locking member 300 on the side of the filter element device away from the first connecting portion 101 is positioned on a very close height plane 113 with the first connecting portion 101 (i.e., the first connecting portion 101 and the part of the filter element device blocked by the locking member 300 are completely opposite or nearly opposite in the radial direction of the filter element device). This allows the locking member 300 to achieve a relatively stable blocking effect.

[0052] In some other implementations, such as Figure 1 , Figure 3 As shown, the first connecting part 101 is used to connect with the main unit. It can be understood that after the first connecting part 101 is connected with the main unit, the movement of the filter element device in the axial direction can be restricted by the connection structure. Combined with the sleeve action of the locking member 300, the position of the filter element device after it is assembled on the main unit can be fixed.

[0053] In order to further enhance the technical effect of fixing the position of the filter element device, the insertion direction of the first connecting part 101 is the first direction X, which is perpendicular to the axis of the filter element device.

[0054] like Figure 1 , Figure 2 , Figure 3As shown, the water treatment equipment provided in this application includes the above-mentioned filter cartridge device and main unit. The main unit includes a body 200 and a locking member 300. The body 200 is provided with a second connecting part 201 for water communication with the filter cartridge device. The locking member 300 is rotatably or slidably (rotatably in the figure) disposed on the body 200. The locking member 300 is used to cooperate with the locking connection part 111 of the filter cartridge device to lock the filter cartridge body 100 to the body 200 and to connect the first connecting part 101 with the second connecting part 201.

[0055] Furthermore, such as Figure 1 , Figure 2 As shown, the locking member 300 is provided with a sleeve interface 301 for engaging with the fixed end 11. The locking connection portion 111 is configured as a fitting groove 03, and when the locking member 300 is engaged with the fixed end 11, the locking member 300 is at least partially embedded in the fitting groove 03. The locking member 300 has a locked state that can be rotated or slid (rotated in the figure) to engage with the fixed end 11, and the locking member 300 also has an unlocked state that can be reset to disengage from the fixed end 11.

[0056] like Figure 1 , Figure 2 As shown, one end of the locking member 300 is rotatably connected to the main unit. The locking member 300 is sleeved onto the fixed end 11 of the filter element device by flipping, without requiring the filter element device to be rotated during the process. Specifically, by setting the first connecting part 101 for water circuit communication with the main unit on the side of the filter element device, combined with the sleeved connection of the locking member 300, the filter element device can be stably assembled onto the main unit without rotation when it is installed, making installation convenient and less prone to jamming.

[0057] In some implementations, such as Figure 1 , Figure 2 , Figure 5 As shown, the locking member 300 includes a collar 31 for fitting onto the outside of the fixed end 11 and a retaining strip 32 for embedding into the fitting groove 03. The retaining strip 32 is connected to the collar 31 or is an integral structure. In practical applications, since the locking member 300 needs to be fitted onto the outer side of the fixed end 11, its structure has a large opening, making it prone to deformation and breakage. Through the above design, the retaining strip 32 can strengthen the structure of the locking member 300 itself, making it less prone to breakage, and providing greater stability and less wobbling after fitting onto the fixed end 11. In addition to the above effects, the retaining strip 32, after embedding into the fitting groove 03, can also fix the position of the filter element device.

[0058] In some implementations, such as Figure 1 , Figure 5As shown, the aforementioned collar 31 has a U-shaped structure, including a horizontal portion 311 and a vertical portion 312. Both ends of the horizontal portion 311 are connected to the vertical portions 312 to form a U-shape. The two vertical portions 312 are rotatably connected to the body 200. Correspondingly, the side of the fixed end 11 is provided with two opposing and parallel planes 113, which are parallel to the rotation planes 113 of the vertical portions 312. When the locking member 300 is in the locked state, the sides of the two vertical portions 312 that are close to each other are respectively in contact with the two planes 113. Through this design, due to the contacting effect between the planes 113 and the vertical portions 312, the filter element device can be prevented from rotating in its circumferential direction, further strengthening the fixation of the filter element device in position.

[0059] In some other implementations, such as Figure 1 , Figure 3 As shown, the first connecting part 101 and the second connecting part 201 can be a connecting plug and a connecting socket that are matched with each other. Since the connecting plug is inserted into the connecting socket, the movement of the filter element device in its axial direction can be restricted.

[0060] In some other embodiments, an elastic element is provided at the movable connection between the locking member 300 and the body 200. The elastic element abuts against both the locking member 300 and the body 200 to keep the locking member 300 in the unlocked state. This design allows the locking member 300 to be in the unlocked state initially during the assembly of the filter element, eliminating the need for manual movement and simplifying the filter element assembly process.

[0061] In some other embodiments, the main body 200 of the aforementioned host is provided with an assembly portion for assembling a filter element device. This assembly portion includes a vertical portion and a supporting portion. The vertical portion is vertically positioned relative to the bottom of the main body 200, and the supporting portion is horizontally positioned relative to the bottom of the main body 200. A second connecting portion 201 is provided on the vertical portion. When the filter element device is assembled onto the assembly portion, the side of the filter element device fits against the vertical portion, and the other end of the filter element device opposite to the fixed end 11 abuts against the supporting portion. Through this design, combined with the locking action of the locking member 300, the filter element device can be stably fixed to the assembly portion of the main body 200.

[0062] In addition to the effects mentioned above, since the second connecting part 201 is located on a vertically positioned part, dust and other airborne particles are less likely to fall directly onto the second connecting part 201 during actual use, making it more hygienic.

[0063] In summary, the filter element device provided in this application does not require rotation of the filter element during assembly with the main unit. Compared with traditional threaded connections or rotary snap-fit ​​connections, the connection method using locking component 300 is less prone to jamming and is more labor-saving during disassembly and installation.

[0064] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter cartridge device, characterized in that, Includes a filter element body (100), the filter element body (100) is provided with a first connecting part (101) for water communication with the host, the first connecting part (101) is provided on the side of the filter element body (100); The filter element body (100) has a fixed end (11), and the end face of the fixed end (11) is provided with a locking connection part (111). The locking connection part (111) is used to cooperate with the locking part (300) of the host to lock the filter element body (100) to the host and to connect the first connecting part (101) with the water circuit of the host.

2. The filter element device according to claim 1, characterized in that, The locking connection part (111) is configured as a fitting groove (03), which is used to allow at least a portion of the locking member (300) to be embedded in the fitting groove (03) when the locking member (300) of the host is connected to the fixed end (11). Alternatively, the locking connection (111) may be a protrusion that can be hooked or fitted onto the locking member (300).

3. The filter element device according to claim 2, characterized in that, The fixed end (11) is used for the locking member (300) of the host to be sleeved, and the fitting groove (03) is used for at least a portion of the locking member (300) to be embedded in the fitting groove (03) when the locking member (300) of the host is sleeved with the fixed end (11). The fitting groove (03) has a predetermined depth, and the fitting groove (03) is used for the embedding part of the locking member (300) of the host to be partially or completely embedded in the end face of the fixed end (11) in the depth direction.

4. The filter element device according to claim 3, characterized in that, The two ends of the fitting groove (03) are connected to the side of the fixed end (11). The groove edge of the fitting groove (03) is provided with a rounded corner structure (01) or a chamfered structure. At the corner where the fitting groove (03) is connected to the side of the fixed end (11), a clearance structure (02) for avoiding the locking part (300) of the host is provided.

5. The filter element device according to claim 3, characterized in that, The side of the fixed end (11) is provided with a socket (112) for the host locking member (300) to fit into, and the shape and size of the socket (112) are the same as the shape and size of the socket (301) of the host locking member (300). And / or, the side of the fixed end (11) is provided with two opposing and parallel planes (113), the two planes (113) being used to abut against the opposite sides of the socket (301) of the locking member (300); The relative distance between the two planes (113) is L5, L5≥66mm, and the height of the planes (113) along the direction from the other end of the filter device to the fixed end (11) is L4, L4≥10mm.

6. The filter element device according to claim 5, characterized in that, The filter element body (100) is set with its axis in the vertical direction, and the end where the fixed end (11) is located is the upper end of the filter element body (100); Along the vertical direction, the height of the socket (112) is lower than or equal to the height of the first connecting part (101).

7. A water treatment device, characterized in that, include: The filter element device according to any one of claims 1 to 6; The main unit includes a body (200) and a locking member (300). The body (200) is provided with a second connecting part (201) for water communication with the filter element device. The locking member (300) is rotatably or slidably disposed on the body (200). The locking member (300) is used to cooperate with the locking connection part (111) of the filter element device to lock the filter element body (100) to the body (200) and to connect the first connecting part (101) with the second connecting part (201).

8. The water treatment equipment according to claim 7, characterized in that, The locking member (300) is provided with a socket (301) for engaging with the fixed end (11). The locking connection part (111) is configured as a fitting groove (03). When the locking member (300) is sleeved with the fixed end (11), the locking member (300) is at least partially used to embed into the fitting groove (03) of the fixed end (11). The locking member (300) has a locked state that can be rotated or slid to engage with the fixed end (11), and the locking member (300) also has an unlocked state that can be reset to disengage from the fixed end (11).

9. The water treatment equipment according to claim 8, characterized in that, The locking member (300) includes a collar (31) for sleeved on the outside of the fixed end (11) and a locking strip (32) for embedding into the fitting groove (03). The locking strip (32) is connected to the collar (31) or is an integral structure.

10. The water treatment equipment according to claim 9, characterized in that, The collar (31) has a U-shaped structure, including a horizontal part (311) and a vertical part (312). Both ends of the horizontal part (311) are connected to the vertical part (312) to form the U-shaped structure. The two vertical parts (312) are rotatably connected to the body (200). When the locking member (300) is in the locked state, the two vertical portions (312) are respectively used to fit against the two planes (113) of the fixed end (11) on the side that is close to each other.

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