Filter cartridge device and water treatment device

Abstract

The utility model provides a kind of filter core device and water treatment device, filter core device includes filter core cylinder, filter core and filter core head, filter core head is connected in the end of filter core cylinder, filter core head includes first joint, second joint and third joint along first direction and side by side arrangement, filter core head is equipped with first bending passageway, second bending passageway and third bending passageway, first bending passageway is connected with the joint passageway of first joint and filter core outer cavity, second bending passageway is connected with the joint passageway of second joint and waste water cavity, third bending passageway is connected with the joint passageway of third joint and hollow passageway, the end of filter core head away from joint assembly is equipped with locking cooperation structure, locking cooperation structure is used to cooperate with the locking piece of filter host machine.This filter core device will each joint be arranged along radial and side by side, can reduce the axial length of filter core device, relieve the impact of water flow, locking cooperation structure can avoid joint assembly relative filter host machine loosening, guarantee the stability of filter core device and filter host machine joint connection.

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 a water treatment device. Background Technology

[0002] In existing water treatment devices (such as water purifiers), the inlet and outlet connectors of the filter cartridge are usually located at the end of the filter cartridge along the axial direction of the cartridge, i.e., a "straight in and straight out" design. This design not only causes the water to directly impact the end of the filter cartridge at a high speed, making it easy for the filter media (such as activated carbon particles, fibers, etc.) inside the filter cartridge to shift, but also requires a relatively long overall length of the filter cartridge, occupying a large amount of space. Utility Model Content

[0003] This utility model proposes a filter cartridge device and a water treatment device, aiming to solve the problems of large water flow impact, easy displacement of the filter medium inside the filter cartridge, excessive axial length of the filter cartridge device, and large installation space occupation caused by the "straight in and straight out" design of traditional water treatment device filter cartridges.

[0004] The filter cartridge device proposed in this utility model includes a filter cartridge, a filter cartridge, and a filter cartridge head. The filter cartridge is disposed inside the filter cartridge, and an outer cavity is formed between the peripheral sidewall of the filter cartridge and the inner peripheral wall of the filter cartridge. A hollow channel is formed in the filter cartridge along the axial direction. A wastewater cavity is provided between the filter cartridge and the filter cartridge head. The filter cartridge head is connected to the end of the filter cartridge. The filter cartridge head includes a connector assembly, which includes a first connector, a second connector, and a third connector, each with a connector channel. The connectors are arranged side by side along a first direction. The filter cartridge head has a first bending channel, a second bending channel, and a third bending channel. The first bending channel connects the connector channel of the first connector and the outer cavity of the filter cartridge. The second bending channel connects the connector channel of the second connector and the wastewater cavity. The third bending channel connects the connector channel of the third connector and the hollow channel. The end of the filter cartridge head away from the connector assembly is provided with a locking fit structure. The locking fit structure is used to cooperate with the locking part of the filter host to prevent the connector assembly from loosening relative to the filter host.

[0005] In one embodiment, the first bending channel includes a first sub-channel and a second sub-channel. The first sub-channel is connected to the connector channel of the first connector and extends along the length direction of the first connector. The second sub-channel is perpendicular to the first sub-channel, with one end connected to the first sub-channel and the other end connected to the outer cavity of the filter element. The second bending channel includes a third sub-channel and a fourth sub-channel. The third sub-channel is connected to the connector channel of the second connector and extends along the length direction of the second connector. The fourth sub-channel is perpendicular to the third sub-channel, with one end connected to the third sub-channel and the other end connected to the wastewater cavity. The third bending channel includes a fifth sub-channel and a sixth sub-channel. The fifth sub-channel is connected to the connector channel of the third connector and extends along the length direction of the third connector. The sixth sub-channel is perpendicular to the fifth sub-channel, with one end connected to the fifth sub-channel and the other end connected to the hollow channel.

[0006] In one embodiment, the filter head further includes a cover and a boss. The cover is sleeved on or inserted into the filter cartridge. The boss is located at the end of the cover away from the filter cartridge. The first connector, the second connector, and the third connector are connected side-by-side to one side of the boss. The boss includes a side wall and a top wall. The side wall is connected to the cover and forms a cavity. The top wall is connected to the end of the side wall away from the cover and covers the cavity. The first sub-channel, the third sub-channel, and the fifth sub-channel are located on the top wall. A first sleeve and a second sleeve protrude from the side of the top wall facing the filter cartridge. The second sleeve is arranged around the outer periphery of the first sleeve. The first sleeve forms the sixth sub-channel. The first sleeve and the second sleeve form the fourth sub-channel. The second sleeve and the side wall form the second sub-channel.

[0007] In one embodiment, the hollow channel has a central tube, and the peripheral wall of the central tube has filter holes. The central tube is partially inserted into the first sleeve, and the outer peripheral wall of the central tube is in contact with the inner peripheral wall of the first sleeve. Alternatively, the hollow channel has a central tube, the central tube is partially inserted into the first sleeve, and the outer peripheral wall of the central tube is in contact with the inner peripheral wall of the first sleeve. A partition is provided in the middle of the central tube to divide the central tube into a first section facing the filter head and a second section away from the filter head. The wall of the first section has filter holes.

[0008] In one embodiment, the boss has a first sidewall and a second sidewall disposed opposite to each other. The first sidewall and the second sidewall are planar and parallel to each joint. The distance between the first sidewall and the second sidewall is L1, where L1 ≥ 10 mm; or, the height of the boss is h, where h ≥ 10 mm; or, each joint is a tubular structure, and the inner diameter of each joint is defined as d2, where 2 mm ≤ d2 ≤ 8 mm; or, the distance between the central axes of two adjacent joints is defined as d3, where 11 mm ≤ d3 ≤ 19 mm.

[0009] In one embodiment, the locking mechanism is a fixed snap-fit ​​structure, which is used to engage and fix with the locking element of the filter host; or, the locking mechanism is a movable snap-fit, which has a first state of extending from the filter head and a second state of being received in the filter head. When the movable snap-fit ​​is in the first state, it can engage and fix with the locking element of the filter host.

[0010] In one embodiment, the locking mechanism is a movable buckle. The end of the filter head away from the connector is provided with a receiving cavity and an opening communicating with the receiving cavity. The opening is oriented in a first direction. The movable buckle is movably inserted into the opening. An elastic element is provided inside the receiving cavity. The telescopic end of the elastic element is connected to the movable buckle and is used to drive the movable buckle to extend out of the opening.

[0011] In one embodiment, the locking member includes a limiting strip, and a limiting portion is provided at the end of the filter head away from the filter cartridge. The limiting portion is located between the connector assembly and the locking engagement structure, and is used to receive or abut the limiting strip, thereby limiting the limiting strip. Alternatively, the locking member includes a limiting strip, and a limiting portion is provided at the end of the filter head away from the filter cartridge. The limiting portion is a slot, which is located between the connector assembly and the locking engagement structure and extends perpendicularly to the connector, and is used to receive the limiting strip, thereby limiting the limiting strip. The mating ends of each connector are flush, and the distance between the side of the slot near the connector and the mating end of the connector is L2, where 15mm≤L2≤90mm.

[0012] This utility model also proposes a water treatment device, which includes a filter host and the filter cartridge device mentioned above. The filter host has a docking assembly, which includes a female seat, a water flow interface connected to the female seat, and a locking member. The female seat is located on the side facing the connector assembly. The number of water flow interfaces is the same as the number of connectors. One water flow interface is docked with one connector. The locking member has a first state of being engaged with the locking fit structure and a second state of being disengaged from the locking fit structure.

[0013] In one embodiment, the inner diameter of each of the water flow interfaces is defined as d6, where 7.5mm ≤ d6 ≤ 15.5mm; and / or, the distance between the central axes of adjacent water flow interfaces is defined as L3, where 11mm ≤ L3 ≤ 19mm.

[0014] This technical solution arranges the first, second, and third connectors side-by-side along the radial direction of the filter element head. These connectors are connected to the outer cavity of the filter element, the wastewater cavity, and the hollow channel of the filter element via first, second, and third bending channels, respectively. This reduces the axial length of the filter element assembly, mitigates water flow impact, prevents displacement of the filter media inside the filter element, and allows for side connection to the water flow interface of the filter host, reducing the overall axial space occupied by the water treatment device. A locking mechanism is provided at the end of the filter element head furthest from the connector assembly. This locking mechanism is used to lock the connector assembly to the locking components of the filter host, preventing the connector assembly from loosening relative to the filter host and ensuring the stability of the connection between the filter element assembly and the filter host. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the filter element device provided by this utility model;

[0017] Figure 2 This is a top view of an embodiment of the filter element device provided by this utility model;

[0018] Figure 3 yes Figure 2 A cross-sectional view of line A-A;

[0019] Figure 4 yes Figure 2 Cross-sectional view of section B-B;

[0020] Figure 5 yes Figure 2 Cross-sectional view of C-C;

[0021] Figure 6 yes Figure 2 Cross-sectional view of D-D;

[0022] Figure 7 This is a cross-sectional view of the filter head in one embodiment of the filter device provided by this utility model;

[0023] Figure 8 This is a bottom view of the filter head in one embodiment of the filter device provided by this utility model;

[0024] Figure 9 This is another cross-sectional view of the filter head in one embodiment of the filter device provided by this utility model;

[0025] Figure 10 This is a schematic diagram of the docking assembly in the filter host of the water treatment device provided by this utility model;

[0026] Figure 11 This is a schematic diagram showing the docking components and filter element device in the unlocked state;

[0027] Figure 12 This is a schematic diagram showing the docking components and filter element in a snap-fit ​​state;

[0028] Figure 13 This is a front view of the docking component provided by this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Filter cartridge; 2. Filter element; 21. Filter element outer cavity; 22. Hollow channel; 23. Wastewater chamber; 3. Filter element head; 31. Connector assembly; 311. First connector; 312. Second connector; 313. Third connector; 314. Sealing groove; 321. First bending channel; 3211. First sub-channel; 3212. Second sub-channel; 322. Second bending channel; 3221. Third sub-channel; 3222. Fourth sub-channel; 323. Third bending channel; 3231. Fifth sub-channel; 3232. Sixth sub-channel; 33. Locking structure; 331. Snap-fit ​​part; 332. Pressing part; 333. Connecting part; 34. 35. Cover; 35. Boss; 351. Receiving cavity; 352. Elastic element; 353. First side wall; 354. Second side wall; 36. First sleeve; 37. Second sleeve; 38. Reinforcing rib; 39. Slot; 4. End cap; 41. End plate; 42. Enclosure plate; 43. Flow channel; 44. Protruding tube; 5. Central tube; 51. First section; 52. Second section; 53. Partition plate; 54. Filter hole; 8. Connecting assembly; 81. Female seat; 811. First connecting seat; 812. Second connecting seat; 82. Water flow interface; 83. Locking element; 831. First cantilever; 832. Second cantilever; 833. Third cantilever; 834. Limiting strip. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0033] Furthermore, in embodiments of this utility model, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure, feature, device, or element referred to must have a specific orientation or positional relationship, nor that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0034] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this utility model will not be described separately.

[0035] In existing water treatment devices (such as water purifiers), the inlet and outlet connectors of the filter cartridge are usually located at the end of the filter cartridge along the axial direction of the cartridge, i.e., a "straight in and straight out" design. This design not only causes the water flow to directly impact the end of the filter cartridge at a high speed, making it easy for the filter media (such as activated carbon particles, fibers, etc.) inside the filter cartridge to shift, but also requires sufficient space to be reserved at the end of the filter cartridge for the connection of the inlet and outlet connectors. This results in a relatively long overall length of the filter cartridge, occupying a large amount of space.

[0036] To solve this problem, this utility model proposes a filter element device.

[0037] Reference Figures 1 to 7The filter cartridge device proposed in this utility model includes a filter cartridge 1, a filter element 2, and a filter head 3. The filter element 2 is disposed inside the filter cartridge 1. A filter element outer cavity 21 is formed between the peripheral sidewall of the filter element 2 and the inner peripheral wall of the filter cartridge 1. A hollow channel 22 is formed in the filter element 2 along the axial direction. A wastewater cavity 23 is provided between the filter element 2 and the filter head 3. The filter head 3 is connected to the end of the filter cartridge 1. The filter head 3 includes a connector assembly 31. The connector assembly 31 includes a first connector 311, a second connector 312, and a third connector 313, each with a connector channel. The connectors are arranged side by side along a first direction. The filter head 3 is provided with a first... The filter element head 3 has a bending channel 321, a second bending channel 322, and a third bending channel 323. The first bending channel 321 connects the connector channel of the first connector 311 and the outer cavity 21 of the filter element. The second bending channel 322 connects the connector channel of the second connector 312 and the wastewater cavity 23. The third bending channel 323 connects the connector channel of the third connector 313 and the hollow channel 22. The end of the filter element head 3 away from the connector assembly 31 is provided with a locking engagement structure 33. The locking engagement structure 33 is used to cooperate with the locking part 83 of the filter host to prevent the connector assembly 31 from loosening relative to the filter host.

[0038] It should be noted that the first direction is the radial direction of the filter cartridge 1, i.e., the X direction indicated in the figure. In this technical solution, the first connector 311, the second connector 312, and the third connector 313 are arranged side-by-side along the radial direction of the filter head 3, and are connected to the outer cavity 21 of the filter cartridge, the wastewater cavity 23, and the hollow channel 22 of the filter cartridge 2 respectively through the first bending channel 321, the second bending channel 322, and the third bending channel 323. This reduces the axial length of the filter cartridge device, mitigates the impact of water flow, prevents displacement of the filter medium inside the filter cartridge 2, and allows for side connection to the water flow interface 82 of the filter host, reducing the overall axial space occupied by the water treatment device. A locking structure 33 is provided at the end of the filter head 3 furthest from the connector assembly 31. The locking structure 33 is used to lock with the locking member 83 of the filter host, preventing the connector assembly 31 from loosening relative to the filter host and ensuring the stability of the connection between the filter cartridge device and the filter host connector.

[0039] Specifically, in this utility model's filter cartridge device, one end of the filter cartridge 1 is closed, and the other end is open. A filter head 3 is connected to the open end to seal the opening. A first connector 311, a second connector 312, and a third connector 313 are all connected to this filter head 3. The first connector 311 is used to connect to the inlet pipe, the second connector 312 is used to connect to the wastewater pipe to discharge wastewater, and the third connector 313 is used to connect to the pure water pipe to discharge pure water. The outer diameter d1 of the filter cartridge 1 (e.g., ...) Figure 1The diameter of the filter element (d1) can be greater than or equal to 50 mm and less than or equal to 130 mm. In specific applications, d1 can be, but is not limited to, 50 mm, 70 mm, 90 mm, 110 mm, and 130 mm. A filter element 2 is installed inside the filter cartridge 1. The diameter of the filter element 2 is smaller than the inner diameter of the filter cartridge 1, so that an outer cavity 21 is formed between the peripheral wall of the filter element 2 and the inner peripheral wall of the filter cartridge 1. A hollow channel 22 is formed in the filter element 2 along the axial direction. A wastewater cavity 23 is provided between the filter element 2 and the filter head 3. The wastewater cavity 23 is used to buffer wastewater that has not passed through the filter element 2. The first connector 311, the second connector 312, and the third connector 313 are arranged side by side along the radial direction of the filter head 3. The filter head 3 is provided with a first bending channel 321, a second bending channel 322 and a third bending channel 323. The first bending channel 321 connects the first connector 311 and the outer cavity 21 of the filter element. The second bending channel 322 connects the second connector 312 and the wastewater cavity 23. The third bending channel 323 connects the third connector 313 and the hollow channel 22.

[0040] The first connector 311, the second connector 312, and the third connector 313 are all tubular structures, and the diameters of the three connectors can be the same. In some embodiments, the inner diameter d2 of the three connectors (e.g., Figure 3 All dimensions (as indicated) are greater than or equal to 2 mm and less than or equal to 8 mm. This range ensures smooth water flow within the joint without making the joint too large and occupying too much space. The distance between the central axis of the first joint 311 and the central axis of the third joint 313 is equal to the distance between the central axis of the second joint 312 and the central axis of the third joint 313, and this distance is defined as d3 (e.g., ...). Figure 2 (Indicated), 11mm≤d3≤19mm, this distance range will not make the distance between the joints too far or too close.

[0041] Reference Figure 2 Each of the three connectors has several sealing grooves 314 on its outer periphery to accommodate the sealing ring, thus ensuring the sealing performance of the connector. The diameter of the bottom of the sealing groove 314 is d4, where 4.5mm ≤ d4 ≤ 8.5mm, and the diameter of the opening of the sealing groove 314 is d5, where 6.5mm ≤ d5 ≤ 14.5mm. This range ensures the installation stability of the sealing ring.

[0042] The flow path of this filter element device is as follows: water flows in from the first connector 311, and then flows along the first bend channel 321 to the outer cavity 21 of the filter element. Under the action of water pressure, the water in the outer cavity 21 passes through the pores of the filter element 2 and enters the hollow channel 22. During this process, the filter element 2 adsorbs and intercepts impurities in the water, thereby purifying the water. Some water forms wastewater due to the interception of impurities. Under the action of water pressure, this wastewater will accumulate in the wastewater cavity 23 between the filter element 2 and the filter head 3, and then flow along the second bend channel 322 to the second connector 312, and finally be discharged out through the wastewater pipe. The water entering the hollow channel 22 is filtered pure water. Under the action of water pressure, this water passes through the third bend channel 323 and finally be discharged out through the third connector 313 and the pure water pipe.

[0043] Reference Figure 5 The first bending channel 321 includes a first sub-channel 3211 and a second sub-channel 3212. The first sub-channel 3211 is connected to the connector channel of the first connector 311 and extends along the length direction of the first connector 311. The second sub-channel 3212 is perpendicular to the first sub-channel 3211, and one end of the second sub-channel 3212 is connected to the first sub-channel 3211, and the other end is connected to the outer cavity 21 of the filter element.

[0044] Reference Figure 3 The second bending channel 322 includes a third sub-channel 3221 and a fourth sub-channel 3222. The third sub-channel 3221 is connected to the connector channel of the second connector 312 and extends along the length direction of the second connector 312. The fourth sub-channel 3222 is perpendicular to the third sub-channel 3221, and one end of the fourth sub-channel 3222 is connected to the third sub-channel 3221, and the other end is connected to the wastewater chamber 23.

[0045] Reference Figure 4 The third bending channel 323 includes a fifth sub-channel 3231 and a sixth sub-channel 3232. The fifth sub-channel 3231 is connected to the connector channel of the third connector 313 and extends along the length of the third connector 313. The sixth sub-channel 3232 is perpendicular to the fifth sub-channel 3231, and one end of the sixth sub-channel 3232 is connected to the fifth sub-channel 3231, and the other end is connected to the hollow channel 22.

[0046] The first bend channel 321 guides water flow from the first connector 311 to the outer cavity 21 of the filter element; the second bend channel 322 guides wastewater from the wastewater cavity 23 to the second connector 312; and the third bend channel 323 guides pure water from the hollow channel 22 to the third connector 313. Each bend channel achieves water flow deflection through two vertically arranged sub-channels, effectively buffering the impact of the water flow. The first bend channel 321, the second bend channel 322, and the third bend channel 323 can be external pipes installed inside the filter element head 3, or channels pre-reserved inside the filter element head 3 through molding or other processing techniques.

[0047] Reference Figure 7 and Figure 8 The filter head 3 also includes a cover 34 and a boss 35. The cover 34 is sleeved on or inserted into the filter cartridge 1. The boss 35 is located at the end of the cover 34 away from the filter cartridge 1. The first connector 311, the second connector 312, and the third connector 313 are connected side by side to one side of the boss 35. The boss 35 includes a side wall and a top wall. The side wall is connected to the cover 34 and forms a cavity. The top wall is connected to the end of the side wall away from the cover 34 and covers the cavity. The first sub-channel 3211, the third sub-channel 3221, and the fifth sub-channel 3231 are located on the top wall. A first sleeve 36 and a second sleeve 37 are provided on the side of the top wall facing the filter element 2. The second sleeve 37 is arranged around the outer periphery of the first sleeve 36. The first sleeve 36 encloses and forms a sixth sub-channel 3232. The first sleeve 36 and the second sleeve 37 enclose and form a fourth sub-channel 3222. The second sleeve 37 and the side wall enclose and form a second sub-channel 3212.

[0048] Specifically, the cover 34 is used to connect with the filter cartridge 1, and can be a continuous annular structure or a discontinuous annular structure. When the inner diameter of the cover 34 matches the outer diameter of the filter cartridge 1, the cover 34 is sleeved on the filter cartridge 1 to connect with it. When the outer diameter of the cover 34 matches the inner diameter of the filter cartridge 1, the cover 34 is inserted into the filter cartridge 1 to connect with it. The cover 34 and the filter cartridge 1 can be an interference fit, or a threaded structure can be provided between the cover 34 and the filter cartridge 1 to achieve threaded fixation. A boss 35 is provided at the end of the cover 34 away from the filter cartridge 1. The boss 35 includes a side wall and a top wall. The side wall is connected to the cover 34 and forms a cavity. The top wall is connected to the end of the side wall away from the cover 34 and covers the cavity. The first connector 311, the second connector 312, and the third connector 313 are connected side-by-side to the boss 35. The first sub-channel 3211, the third sub-channel 3221, and the fifth sub-channel 3231 are located on the top wall, thus communicating with the first connector 311, the second connector 312, and the third connector 313 respectively. A first sleeve 36 and a second sleeve 37 protrude from the side of the top wall facing the filter element 2. The second sleeve 37 surrounds the outer periphery of the first sleeve 36. The first sleeve 36 encloses and forms the sixth sub-channel 3232. The first sleeve 36 and the second sleeve 37 enclose and form the fourth sub-channel 3222. The second sleeve 37 and the side wall enclose and form the second sub-channel 3212. In summary, the bent channels in this embodiment are channels pre-reserved internally by the filter element head 3 through the processing technology, which can reduce the use of external pipes and ensure the sealing and stability of the filter element head 3.

[0049] The boss 35 has a first sidewall 353 and a second sidewall 354 disposed opposite to each other. The first sidewall 353 and the second sidewall 354 are arranged in a planar shape. In some embodiments, the distance L1 between the first sidewall 353 and the second sidewall 354 is (e.g., Figure 2 The marking (L1) can be 60% to 80% of the pipe diameter. In specific applications, L1 can be greater than or equal to 66mm, and the height h of the boss (e.g.) Figure 3 (The marking) can be greater than or equal to 10mm. This is beneficial for the channel setup, ensuring that the water can flow smoothly within the channel.

[0050] Reference Figure 8 The second sleeve 37 is provided with reinforcing ribs 38 on its periphery. The reinforcing ribs 38 are arranged circumferentially around the second sleeve 37. One end of the reinforcing rib 38 is connected to the second sleeve 37, and the other end of the reinforcing rib 38 is connected to the side wall. The reinforcing ribs 38 divide the second sub-channel 3212 into several compartments. Adjacent compartments are connected. The first sub-channel 3211 is connected to one compartment, and one compartment is connected to the outer cavity 21 of the filter element. The reinforcing ribs 38 increase the connection strength between the second sleeve 37 and the side wall, which can enhance the structural strength of the entire filter element head 3, allowing the filter element head 3 to better resist water flow impact and external pressure.

[0051] Reference Figure 4 or Figure 6 In the embodiment provided by this utility model, a central tube 5 is provided in the hollow channel 22. The outer diameter of the central tube 5 matches the diameter of the hollow channel 22, so that the tube wall of the central tube 5 is in close contact with the filter element 2. The peripheral wall of the central tube 5 is provided with water filtering holes 54, so that water filtered by the filter element 2 can enter the central tube 5 through the water filtering holes 54. The central tube 5 is partially inserted into the first sleeve 36, and the outer peripheral wall of the central tube 5 is in contact with the inner peripheral wall of the first sleeve 36. The pure water filtered by the filter element 2 can enter the interior of the central tube 5 through the holes of the filter element 2 on the central tube 5, and then flow to the third bend channel 323, and finally be discharged outward through the third connector 313, while the unfiltered wastewater is separated outside the central tube 5. It can be seen that the central tube 5 can effectively prevent the mixing of pure water and wastewater, ensuring the purity of pure water.

[0052] Reference Figure 6 The filter cartridge assembly also includes an end cap 4, which is disposed between the filter cartridge 2 and the filter cartridge head 3 to isolate the inlet and outlet water flows. Specifically, the end cap 4 includes an end plate 41, which covers the filter cartridge 2. A surrounding plate 42 is provided on the side of the end plate 41 facing the filter cartridge 2. The surrounding plate 42 and the end plate 41 enclose each other to form a limiting groove, in which the filter cartridge 2 is partially inserted. The surrounding plate 42 is spaced apart from the inner wall of the filter cartridge cylinder 1 to form a flow channel 43, which connects the second sub-channel 3212 and the outer cavity 21 of the filter cartridge. The end plate 41 is spaced apart from the end wall of the filter cartridge 2 to form a wastewater cavity 23. The end plate 41 has a protruding tube 44 on the side facing the filter head 3. The protruding tube 44 is at least partially inserted into the fourth sub-channel 3222. The outer side wall of the protruding tube 44 is fitted with the inner side wall of the first sleeve 36. The inner side wall of the protruding tube 44 is spaced apart from the outer side wall of the second sleeve 37, so that the wastewater in the wastewater chamber 23 can flow from the gap between the inner side wall of the protruding tube 44 and the outer side wall of the second sleeve 37 to the fourth sub-channel 3222.

[0053] In summary, referring to Figure 6 The flow path of this filter element device is as follows: water flows in from the first connector 311, and then flows sequentially through the first sub-channel 3211, the second sub-channel 3212, and the flow channel 43 before flowing into the outer cavity 21 of the filter element. Under the action of water pressure, the water in the outer cavity 21 of the filter element passes through the pores of the filter element 2 and enters the hollow channel 22. Then it enters the interior of the central tube 5 through the filter element 2 hole on the central tube 5, and then flows along the central tube 5 to the sixth sub-channel 3232 and the fifth sub-channel 3231. Finally, it is discharged outward from the third connector 313 and the pure water pipe. The wastewater intercepted by the filter element 2 is collected in the wastewater cavity 23 between the filter element 2 and the filter element head 3. Under the action of water pressure, this wastewater flows through the fourth sub-channel 3222 and the third sub-channel 3221, and finally is discharged outward from the second connector 312.

[0054] The central tube 5 can be divided into a first section 51 facing the filter head 3 and a second section 52 away from the filter head 3 by a partition 53 in the middle. The filter holes 54 are located on the wall of the first section 51. Wastewater naturally sinks under gravity. Due to its greater depth, the wastewater at the bottom has higher pressure. If the filter holes 54 are located at the bottom of the central tube 5, the high pressure may force wastewater through the filter holes 54 into the central tube 5, causing contamination of the pure water. In this embodiment, the filter holes 54 are located on the wall of the first section 51, keeping them away from the high-pressure area at the bottom. This prevents wastewater from entering the central tube 5 under high pressure, ensuring the purity of the water in the central tube 5.

[0055] The end of the filter head 3 furthest from the connector assembly 31 is provided with a locking structure 33. This locking structure 33 can be a fixed snap-fit ​​structure, used to engage and secure with the locking member 83 of the filter host. A "fixed snap-fit ​​structure" means that this snap-fit ​​structure is permanently connected to the filter head 3; its position and shape are relatively fixed and cannot move, providing a stable connection. Pressing the locking member 83 of the filter host to the appropriate position will lock the locking member 83 into the snap-fit ​​structure. The fixed snap-fit ​​structure offers high connection stability and is suitable for scenarios where frequent filter element 2 replacement is not required.

[0056] Alternatively, the locking mechanism 33 can be a movable snap-fit, which has a first state extending radially from the filter head 3 and a second state being received within the filter head 3. When the movable snap-fit ​​is in the first state, it can engage and secure with the locking member 83 of the filter unit. The movable snap-fit ​​makes the connection and disassembly between the filter head 3 and the locking member 83 more convenient, thereby facilitating the separation of the filter element assembly from the filter unit and improving the user's operational convenience when replacing the filter element 2. This is suitable for scenarios requiring frequent replacement of the filter element 2.

[0057] Specific reference Figure 9 The filter head 3 has a receiving cavity 351 and an opening communicating with the receiving cavity 351 at the end away from the connector. The opening is oriented radially towards the filter head 3, i.e., the X direction indicated in the figure. A movable buckle is movably inserted through the opening. An elastic element 352 is provided inside the receiving cavity 351. The telescopic end of the elastic element 352 is connected to the movable buckle and is used to drive the movable buckle to extend out of the opening.

[0058] The elastic element 352 can be a spring, rubber pad, or other elastic material. It has a fixed end and a telescopic end. The fixed end is fixedly connected to the inner wall of the receiving cavity 351, and the telescopic end is connected to the movable latch. Under the elastic force of the elastic element 352, the movable latch partially extends out of the opening (initial state), providing a latching point for the locking element 83, and is locked in place. When it is necessary to release the connection between the locking element 83 and the filter head 3, simply apply pressure to the movable latch to retract the spring, causing the movable latch to return to the receiving cavity 351, thus separating from the locking element 83 and unlocking. After releasing the pressure on the movable latch, it automatically returns to its initial state under the action of the elastic element 352.

[0059] Furthermore, the opening includes a first opening and a second opening spaced apart vertically. The movable buckle includes a buckle part 331, a pressing part 332, and a connecting part 333. The buckle part 331 is movably inserted through the first opening, the pressing part 332 is movably inserted through the second opening, and the connecting part 333 is disposed in the receiving cavity 351 and connects the buckle part 331 and the pressing part 332. The telescopic end of the elastic member 352 is connected to the pressing part 332 or the connecting part 333.

[0060] The latching part 331 is used to engage and fix with the locking member 83, the pressing part 332 is used for the user to apply pressing pressure, and the connecting part 333 is disposed in the receiving cavity 351 to connect the latching part 331 and the pressing part 332, realizing the linkage between the pressing part 332 and the latching part 331, and ensuring that the pressing part 332 and the latching part 331 can extend or retract stably and synchronously. The telescopic end of the elastic member 352 is connected to the pressing part 332 or the connecting part 333. Under the pushing action of the elastic member 352, the latching part 331 and the pressing part 332 extend out of the first opening and the second opening respectively, and the latching part 331 serves as the latching action point of the locking member 83. When it is necessary to disengage the connection between the locking member 83 and the filter head 3, simply apply pressure to the pressing part 332 to retract the spring. The pressing part 332 will then retract the connecting part 333 and the latching part 331 together, separating the latching part 331 from the locking member 83 and unlocking it. After releasing the pressure on the pressing part 332, the movable latch will automatically return to its initial state under the action of the elastic member 352. In this embodiment, the latching part 331 and the pressing part 332 are separated, and the latching part 331 is located above the pressing part 332, which can prevent the user's finger from interfering with the locking member 83 when performing the pressing and unlocking operation.

[0061] like Figure 10 As shown, the locking member 83 may include a limiting strip 834. Correspondingly, a limiting part is provided at the end of the filter element head 3 away from the filter element cylinder 1. The limiting part is located between the connector assembly 31 and the locking engagement structure 33 and is used to accommodate the limiting strip 834 or block the limiting strip 834, thereby limiting the limiting strip 834.

[0062] In some embodiments, the limiting part is a slot 38, such as Figure 2 As shown, the slot 38 extends perpendicularly to the connector and is used to receive the limiting strip 834, thereby limiting the position of the limiting strip 834. Specifically, the locking member 83 has a clearance opening for inserting the filter head 3 and a limiting strip 834 spanning the clearance opening. The slot 38 allows the limiting strip 834 to be inserted, which can prevent the filter head 3 from being over-inserted and facilitates better positioning of the locking member 83.

[0063] The distance between the card slot 38 and the connector assembly 31 should not be too far or too close. (Refer to...) Figure 2 The mating ends of the first connector 311 and the second connector 312 are flush. The distance from the side of the slot 38 near the connector to the end of the connector away from the boss is L2, 15mm≤L2≤90mm. In specific applications, L2 can be, but is not limited to, 15mm, 30mm, 50mm, 70mm, and 90mm.

[0064] In some embodiments, the limiting part may be a protruding structure provided on the top of the filter head 3. The protruding structure may contact and limit the limiting strip 834 on the side close to the locking and fitting structure 33, or the protruding structure may contact and limit the limiting strip 834 on the side away from the locking and fitting structure 33.

[0065] This utility model also proposes a water treatment device, which includes a filter host and a filter element device. The specific structure of the filter element device is as described in the above embodiments. Since this water treatment device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0066] Reference Figures 10 to 12 The filter unit has a docking assembly 8, which includes a female seat 81 and a water flow interface 82 and a locking member 83 connected to the female seat 81. The female seat 81 is located on the side facing the connector assembly 31. The number of water flow interfaces 82 is the same as the number of connectors. One water flow interface 82 is docked with one connector. The locking member 83 has a first state of being engaged with the locking engagement structure 33 and a second state of being disengaged from the locking engagement structure 33.

[0067] Specifically, the docking assembly 8 is used to connect the filter host and the filter cartridge device. The docking assembly 8 includes a female seat 81, a water flow interface 82 connected to the female seat 81, and a locking member 83. The female seat 81 is located on the side facing the connector assembly 31. The water flow interface 82 is connected to the female seat 81 and faces the docking assembly 8, and the number of water flow interfaces 82 is the same as the number of connectors. One water flow interface 82 is docked with one connector, thereby realizing the connection between the water circuit of the filter host and the water circuit of the filter cartridge device. The locking member 83 is connected to the side of the female seat 81 facing the filter cartridge head 3 and is used to snap and fix it with the locking engagement structure 33 on the filter cartridge head 3. The side docking arrangement of the water flow interface 82 and the connector can reduce the overall longitudinal length of the filter host and the filter cartridge device, making the overall structure of the water treatment device more compact.

[0068] The locking member 83 and the locking engagement structure 33 are used to achieve a stable connection between the filter element device and the filter host. The locking member 83 may include a first cantilever 831, a second cantilever 832, and a third cantilever 833 arranged opposite to each other. The first cantilever 831 and the second cantilever 832 are arranged opposite to each other and connected to the side of the female seat 81 facing the filter head 3. The two ends of the third cantilever 833 are respectively connected to the first cantilever 831 and the second cantilever 832, and are located at the ends of the first cantilever 831 and the second cantilever 832 away from the female seat 81. The first cantilever 831, the second cantilever 832, and the third cantilever 833 together form a clearance opening for the insertion of the filter head 3. The third cantilever 833 is used to snap and fix with the locking engagement structure 33.

[0069] In some embodiments of this utility model, the first cantilever 831 and the second cantilever 832 can be rotatably connected to the female seat 81 so that the third cantilever 833 can rotate to engage with the locking structure 33. Specifically, the female seat 81 has a first connecting seat 811 and a second connecting seat 812 on the side facing the filter head 3. The first connecting seat 811 and the second connecting seat 812 are respectively located on both sides of the water flow interface 82. The first cantilever 831 is rotatably connected to the first connecting seat 811 through a first rotating shaft, and the second cantilever 832 is rotatably connected to the second connecting seat 812 through a second rotating shaft. At this time, the locking member 83 is a rotating clamp. The first cantilever 831 and the second cantilever 832 can drive the third cantilever 833 to rotate. When the third cantilever 833 rotates to the end of the filter head 3 away from the connector assembly 31 and abuts against the locking structure 33 on the filter head 3, the third cantilever 833 will be locked and fixed with the locking structure 33, realizing the connection and fixation between the filter host and the filter device.

[0070] Alternatively, the first cantilever 831 and the second cantilever 832 can be slidably connected to the female seat 81, with the sliding direction of the first cantilever 831 and the second cantilever 832 being axial along the filter cartridge 1, so that the third cantilever 833 can move to engage with the locking structure 33. Specifically, the female seat 81 has a first slide rail and a second slide rail on the side facing the filter head 3. The first slide rail and the second slide rail are respectively located on both sides of the water inlet 82 and extend axially along the filter cartridge 1. The first cantilever 831 is slidably connected to the first slide rail, and the second cantilever 832 is slidably connected to the second slide rail. In this case, the locking member 83 is a sliding clamp, and the first cantilever 831 and the second cantilever 832 can drive the third cantilever 833 to move up and down. When the third cantilever 833 moves to the end of the filter head 3 away from the connector assembly 31 and abuts against the locking structure 33 on the filter head 3, the third cantilever 833 will be locked and fixed with the locking structure 33, realizing the connection and fixation between the filter host and the filter device.

[0071] Reference Figure 10 The locking component 83 also includes a limiting strip 834, which is disposed within the clearance formed by the first cantilever 831, the second cantilever 832, and the third cantilever 833. One end of the limiting strip 834 is connected to the first cantilever 831, and the other end is connected to the second cantilever 832. The limiting strip 834 is used to engage with the slot 39 on the filter head 3 to limit the locking component 83 from over-fitting and to facilitate better positioning of the locking component 83.

[0072] Reference Figure 13 The pipe diameter of each water flow interface 82 is defined as d6, where 7.5mm ≤ d6 ≤ 15.5mm. In practical applications, the pipe diameters of each water flow interface 82 can be the same or different. The inner diameter of the water flow interface 82 is slightly larger than the diameter d5 of the groove 314 on the corresponding connector, and matches the outer diameter of the corresponding connector. Combined with the sealing ring, this ensures a tight connection between the water flow interface 82 and the corresponding connector. The distance between the central axes of adjacent water flow interfaces is defined as L3, where 11mm ≤ L3 ≤ 19mm. The distance between the central axes of adjacent water flow interfaces is equal to the distance between the central axes of adjacent connectors, which helps to align each water flow interface with its corresponding connector and improves assembly accuracy.

[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter cartridge device, characterized in that, include: Filter cartridge; A filter element is disposed inside the filter element cylinder. An outer cavity is formed between the peripheral sidewall of the filter element and the inner peripheral wall of the filter element cylinder. A hollow channel is formed in the filter element along the axial direction. A wastewater cavity is provided between the filter element and the filter element head. A filter element head is connected to the end of a filter element cartridge. The filter element head includes a connector assembly, which includes a first connector, a second connector, and a third connector, each connector being arranged side-by-side along a first direction. The filter element head is provided with a first bending channel, a second bending channel, and a third bending channel. The first bending channel connects the connector channel of the first connector to the outer cavity of the filter element. The second bending channel connects the connector channel of the second connector to the wastewater cavity. The third bending channel connects the connector channel of the third connector to the hollow channel. The filter element head has a locking mechanism at the end away from the connector assembly. The locking mechanism is used to engage with the locking component of the filter host to prevent the connector assembly from becoming loose relative to the filter host. The filter head also includes a cover and a boss. The cover is sleeved on or inserted into the filter cylinder. The boss is located at the end of the cover away from the filter cylinder. The first connector, the second connector, and the third connector are connected side by side to one side of the boss. The boss includes a side wall and a top wall. The side wall is connected to the cover and forms a cavity. The top wall is connected to the end of the side wall away from the cover and covers the cavity. A first sub-channel, a third sub-channel and a fifth sub-channel are provided on the top wall. The top wall has a first sleeve and a second sleeve protruding on the side facing the filter element. The second sleeve is arranged around the outer periphery of the first sleeve. The first sleeve forms a sixth sub-channel. The first sleeve and the second sleeve form a fourth sub-channel. The second sleeve and the side wall form a second sub-channel.

2. The filter element device as described in claim 1, characterized in that, The first bending channel includes a first sub-channel and a second sub-channel. The first sub-channel is connected to the connector channel of the first connector and extends along the length direction of the first connector. The second sub-channel is perpendicular to the first sub-channel, and one end of the second sub-channel is connected to the first sub-channel, while the other end is connected to the outer cavity of the filter element. The second bending channel includes a third sub-channel and a fourth sub-channel. The third sub-channel is connected to the connector channel of the second connector and extends along the length direction of the second connector. The fourth sub-channel is perpendicular to the third sub-channel, and one end of the fourth sub-channel is connected to the third sub-channel, and the other end is connected to the wastewater chamber. The third bending channel includes a fifth sub-channel and a sixth sub-channel. The fifth sub-channel is connected to the connector channel of the third connector and extends along the length direction of the third connector. The sixth sub-channel is perpendicular to the fifth sub-channel, and one end of the sixth sub-channel is connected to the fifth sub-channel, while the other end is connected to the hollow channel.

3. The filter element device as described in claim 1, characterized in that, The hollow channel is provided with a central tube, and the peripheral sidewall of the central tube is provided with water filter holes. The central tube is partially inserted into the first sleeve, and the outer peripheral wall of the central tube is in contact with the inner peripheral wall of the first sleeve. Alternatively, the hollow channel may have a central tube, which is partially inserted into the first sleeve, with the outer peripheral wall of the central tube in contact with the inner peripheral wall of the first sleeve. The central tube may have a partition in the middle to divide it into a first section facing the filter head and a second section away from the filter head. The first section may have filter holes in its tube wall.

4. The filter element device as described in claim 1, characterized in that, The boss has a first sidewall and a second sidewall that are arranged opposite to each other. The first sidewall and the second sidewall are planar and parallel to each joint. The distance between the first sidewall and the second sidewall is L1, where L1 ≥ 10 mm. Alternatively, the height of the boss is h, where h ≥ 10 mm; Alternatively, each connector can be a tubular structure, with the inner diameter of each connector defined as d2, where 2mm ≤ d2 ≤ 8mm; Alternatively, the distance between the centerlines of two adjacent joints can be defined as d3, where 11mm ≤ d3 ≤ 19mm.

5. The filter element device according to any one of claims 1 to 4, characterized in that, The locking mechanism is a fixed snap-fit ​​structure, which is used to engage and fix with the locking component of the filter host. Alternatively, the locking mechanism is a movable buckle, which has a first state of extending from the filter head and a second state of being received within the filter head. When the movable buckle is in the first state, it can be engaged and fixed with the locking component of the filter host.

6. The filter element device as described in claim 5, characterized in that, The locking mechanism is a movable buckle. The end of the filter head away from the connector is provided with a receiving cavity and an opening communicating with the receiving cavity. The opening is oriented in a first direction, and the movable buckle is movably inserted into the opening. The cavity is provided with an elastic element, the telescopic end of which is connected to the movable buckle to drive the movable buckle to extend out of the opening.

7. The filter element device as described in claim 6, characterized in that, The locking component includes a limiting strip, and a limiting part is provided at the end of the filter head away from the filter cartridge. The limiting part is located between the connector assembly and the locking engagement structure and is used to accommodate the limiting strip or block the limiting strip, thereby limiting the limiting strip. Alternatively, the locking element includes a limiting strip, and a limiting portion is provided at the end of the filter head away from the filter cartridge. The limiting portion is a slot, which is located between the connector assembly and the locking mating structure and extends perpendicularly to the connector to accommodate the limiting strip and thus limit the limiting strip. The mating ends of each connector are flush, and the distance between the side of the slot near the connector and the mating end of the connector is L2, where 15mm≤L2≤90mm.

8. A water treatment device, characterized in that, The filter includes a filter host and a filter cartridge device as described in any one of claims 1 to 7, the filter host having a docking assembly, the docking assembly including a female seat and a water inlet and a locking member connected to the female seat, the female seat being located on the side facing the connector assembly, one of the water inlets docking with a connector of the connector assembly, the locking member having a first state of being engaged with the locking engagement structure and a second state of being disengaged from the locking engagement structure.

9. The water treatment apparatus as described in claim 8, characterized in that, The inner diameter of each of the water flow interfaces is defined as d6, 7.5mm≤d6≤15.5mm; and / or, the distance between the central axes of adjacent water flow interfaces is defined as L3, 11mm≤L3≤19mm.

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