Filter element device and water purifier

Abstract

The application is suitable for the field of water purification equipment, and discloses a filter core device and a water purifier. The filter core device comprises a filter core main body provided with a filter core water body interface in a first direction, the filter core water body interface is used for connecting a host water body interface of a filter host, the filter core main body is further provided with a clamping cooperation structure, the clamping cooperation structure is used for connecting a clamping component of the filter host, so as to prevent the filter core water body interface from exiting the host water body interface. The filter core main body is provided with a first flow channel, a second flow channel and a third flow channel extending in a second direction, the first flow channel, the second flow channel and the third flow channel are sequentially sleeved and isolated from inside to outside. The filter core water body interface comprises a first pipe body, a second pipe body and a third pipe body extending in the first direction, the first flow channel is connected with an inner cavity of the first pipe body, the second flow channel is connected with an inner cavity of the second pipe body, the third flow channel is connected with an inner cavity of the third pipe body, and the first direction is perpendicular to the second direction. The structure of the filter core main body corresponding to the host water body interface part and the design of the water flow channel are simple and orderly.

Description

Technical Field

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

[0002] As people's living standards improve, their requirements for water quality are also increasing. Therefore, water purification equipment is becoming increasingly widely used. The filter element is the core component of water purification equipment. Most existing filter elements have interfaces on their end faces, rarely on the sides. That is, the interfaces are usually located along the axial direction of the filter element, rarely along the radial direction. Even if some filter elements have interfaces on the side, the internal structure of the corresponding interface portion and the design of the water flow channels are relatively complex, making filter element manufacturing inconvenient and hindering the assembly of the various components. Utility Model Content

[0003] This application provides a filter cartridge device and a water purifier, aiming to solve the technical problem that the construction of the corresponding interface part inside the filter cartridge and the design of the water flow channel are relatively complicated when the interface is set on the side of the filter cartridge.

[0004] According to a first aspect of this application, one embodiment provides a filter cartridge device for connection to a filter host, the filter host being provided with a host water interface and a clamping component; the filter cartridge device includes a filter cartridge body, the filter cartridge body being provided with a filter cartridge water interface in a first direction, the filter cartridge water interface being used to connect to the host water interface, the filter cartridge body also being provided with a clamping engagement structure, the clamping engagement structure being used to connect with the clamping component to prevent the filter cartridge water interface from retracting from the host water interface;

[0005] The filter element body has a first flow channel, a second flow channel, and a third flow channel extending along a second direction. The first flow channel, the second flow channel, and the third flow channel are sequentially nested from the inside out and isolated from each other. The filter element water interface includes a first tube, a second tube, and a third tube. The first tube, the second tube, and the third tube all extend along the first direction. The first flow channel connects to the inner cavity of the first tube, the second flow channel connects to the inner cavity of the second tube, and the third flow channel connects to the inner cavity of the third tube. The first direction and the second direction are perpendicular to each other.

[0006] In one embodiment, the second tube and the third tube are located on opposite sides of the first tube and are equidistant from the first tube, and the central axis of the first tube intersects the central axis of the first flow channel.

[0007] In one embodiment, the filter element body includes a filter assembly and a filter element connector;

[0008] The filter element connector includes a connector body and a filter element water interface. The connector body is connected to one end of the filter assembly, and the filter element water interface is connected to the connector body along the first direction. The first flow channel, the second flow channel, and the third flow channel are all disposed in the connector body.

[0009] The filter assembly has a filter water path, a wastewater water path, and an inlet water path. The first flow channel is used to connect the inner cavity of the first pipe body and the filter water path. The second flow channel is used to connect the inner cavity of the second pipe body and the wastewater water path. The third flow channel is used to connect the inner cavity of the third pipe body and the inlet water path.

[0010] In one embodiment, the connector body includes a central tube, a sleeve, a body, and an end cap; the sleeve and the body are sequentially sleeved around the central tube from the inside to the outside, and both extend along the second direction; the end cap is connected to the end of the central tube, the sleeve, and the body away from the filter assembly; the central tube and the end cap form a first flow channel; the central tube, the sleeve, and the end cap form a second flow channel; and the sleeve, the body, and the end cap form a third flow channel.

[0011] The first tube is sequentially inserted through the body, the sleeve, and the central tube, so that the first flow channel communicates with the inner cavity of the first tube; the second tube is sequentially inserted through the body and the sleeve, so that the second flow channel communicates with the inner cavity of the second tube; the third tube is inserted through the body, so that the third flow channel communicates with the inner cavity of the third tube.

[0012] In one embodiment, the locking and engaging structure includes a limiting portion disposed on the side of the end cover plate opposite to the filter assembly, the limiting portion being used to limit the locking component.

[0013] In one embodiment, the limiting part is a slot; the end cover plate forms a boss on the side close to the filter assembly to form the slot on the side of the end cover plate opposite to the filter assembly; the boss passes through the central tube along a third direction, which is perpendicular to the first direction and the second direction;

[0014] The boss has an inner surface facing the first tube body inside the central tube. The two ends of the inner surface of the boss intersect the inner wall of the central tube. The length of the inner surface of the boss is L1, and the diameter of the central tube is D, where D / 4≤L1≤D; and / or, the first tube body, the second tube body, and the third tube body are flush with each other at the end away from the connector body. The distance from the side of the slot near the first tube body to the end of the first tube body away from the connector body is L2, where 15mm≤L2≤90mm.

[0015] In one embodiment, the second tube and the third tube are located on opposite sides of the first tube and are equidistant from the first tube. The central axis of the first tube intersects the central axis of the central tube, and the central tube is coaxial with the sleeve tube.

[0016] The distance from the central axis of the first pipe to the inner wall of the second pipe on the side facing the first pipe is defined as L3, and the radius of the sleeve is R, where L3 < R.

[0017] In one embodiment, the locking and engaging structure further includes the body, which is used for the sleeve of the locking component to be flipped or slidably engaged.

[0018] In one embodiment, the body has a first outer surface, a second outer surface, a third outer surface, and a fourth outer surface, the first outer surface, the second outer surface, the third outer surface, and the fourth outer surface surrounding the outer periphery of the body; the first outer surface and the third outer surface are disposed opposite to each other; the filter element water interface is disposed on the first outer surface, and at least one of the second outer surface, the third outer surface, and the fourth outer surface is planar.

[0019] When the clamping component is connected to the clamping mating structure, the inner side of the sleeve is in contact with the second outer surface, the third outer surface and the fourth outer surface.

[0020] In one embodiment, both the second outer surface and the fourth outer surface are planar, and the distance between the second outer surface and the fourth outer surface is greater than or equal to 66 mm;

[0021] And / or, the height of the body is greater than or equal to 10 mm.

[0022] In one embodiment, the distance between the sleeve and the central tube is less than the shortest distance between the sleeve and the body;

[0023] Alternatively, the central tube may protrude from the sleeve and the body at one end facing the filter assembly;

[0024] Alternatively, the first tube, the second tube, and the third tube are attached to the end cover plate. The end cover plate includes a main body and an extension. The main body is connected to the end of the central tube, the sleeve tube, and the body away from the filter assembly. The extension is connected to the main body along the first direction. The extension has a recessed structure in the area corresponding to the water interface of the filter element.

[0025] In one embodiment, the filter element device further includes a locking component, which is used to lock the clamping component in a locked state when connected with the clamping engagement structure. The end face of the connector body is recessed to form a receiving cavity, and the connector body is also provided with an opening communicating with the receiving cavity in the circumferential direction. The locking component is disposed in the receiving cavity and can partially extend out of the receiving cavity from the opening, protruding from the outer periphery of the connector body. The receiving cavity is located on the side of the sleeve connecting pipe away from the water interface of the filter element.

[0026] Alternatively, the connector body may further include multiple reinforcing plates connected between the sleeve, the body and the end cover. The multiple reinforcing plates are arranged radially around the sleeve, dividing the third flow channel into multiple sub-flow channels, which are interconnected.

[0027] In one embodiment, the connector body further includes a connecting plate and a connecting ring;

[0028] The connecting plate has a plate-shaped annular structure. The inner edge of the connecting plate is connected to the end of the body away from the end cover plate. The connecting ring is connected to the outer edge of the connecting plate and extends away from the body along the second direction. The connecting ring is used to sleeve and connect with the filter assembly.

[0029] In one embodiment, the filter assembly is cylindrical, and the outer diameter of the filter assembly is greater than or equal to 50 mm and less than or equal to 130 mm.

[0030] In one embodiment, the first pipe, the second pipe, and the third pipe have the same diameter;

[0031] The inner diameters of the first tube, the second tube, and the third tube are all greater than or equal to 2 mm and less than or equal to 8 mm, and / or the distance between the central axis of the first tube and the central axis of the second tube is greater than or equal to 11 mm and less than or equal to 19 mm.

[0032] In one embodiment, the first pipe, the second pipe, and the third pipe have the same diameter;

[0033] The first pipe body includes a first pipe body and a first connector connected to one end of the first pipe body. The first connector is used to connect to the host water interface. A sealing groove is provided on the outer periphery of the first connector to accommodate a sealing ring.

[0034] The first connector has a first outer diameter and a second outer diameter. The first outer diameter is the distance between the opening of the sealing groove on opposite sides of the first connector, and the second outer diameter is the distance between the bottom of the sealing groove on opposite sides of the first connector. The first outer diameter is greater than or equal to 6.5 mm and less than or equal to 14.5 mm, and the second outer diameter is greater than or equal to 4.5 mm and less than or equal to 12.5 mm. The outer diameter of the first tube body is greater than or equal to 7.5 mm and less than or equal to 15.5 mm.

[0035] According to a second aspect of this application, one embodiment provides a water purifier, including a filter host for connecting to the filter cartridge device of the first aspect described above. The filter host has a host water interface for docking with the filter cartridge water interface. The filter host also has a locking component for connecting to the locking engagement structure.

[0036] In one embodiment, the host water interface includes a first connecting pipe, a second connecting pipe, and a third connecting pipe. The second connecting pipe and the third connecting pipe are respectively disposed on both sides of the first connecting pipe and are equidistant from the first connecting pipe. The first connecting pipe is used to connect to the first pipe body, the second connecting pipe is used to connect to the second pipe body, and the third connecting pipe is used to connect to the third pipe body.

[0037] The first connecting pipe, the second connecting pipe, and the third connecting pipe have the same diameter. The inner diameter of the first connecting pipe, the inner diameter of the second connecting pipe, and the inner diameter of the third connecting pipe are all greater than or equal to 7.5 mm and less than or equal to 15.5 mm, and / or the distance between the central axis of the first connecting pipe and the central axis of the second connecting pipe is greater than or equal to 11 mm and less than or equal to 19 mm.

[0038] According to the filter cartridge device and water purifier of the above embodiments, a first flow channel, a second flow channel, and a third flow channel are sequentially nested from the inside out and isolated from each other, and the arrangement of the first flow channel, the second flow channel, and the third flow channel is relatively regular. A first tube body, a second tube body, and a third tube body are all arranged along a first direction, and the arrangement of the first tube body, the second tube body, and the third tube body is relatively regular. The first flow channel connects to the inner cavity of the first tube body, the second flow channel connects to the inner cavity of the second tube body, and the third flow channel connects to the inner cavity of the third tube body. The first tube body, the second tube body, and the third tube body are used to connect to the main water interface of the filter host. Therefore, the structure of the filter cartridge body corresponding to the main water interface and the design of the water flow channels are relatively simple and orderly, which is beneficial for the processing and assembly of the filter cartridge device. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the assembly structure of the filter element device and the filter host provided in this embodiment of the utility model;

[0041] Figure 2 This is an exploded view of the filter element device and filter host provided in the embodiment of this utility model;

[0042] Figure 3 This is a schematic diagram of the assembly structure of the filter element device provided in this embodiment of the utility model;

[0043] Figure 4 This is a structural schematic diagram of the filter element connector provided in the embodiment of this utility model from a first perspective;

[0044] Figure 5 This is a structural schematic diagram of the filter element connector provided in an embodiment of the present utility model from a second perspective;

[0045] Figure 6 This is a structural schematic diagram of the filter element connector provided in an embodiment of the present utility model from a third perspective;

[0046] Figure 7 This is a bottom view of the filter element connector provided in this embodiment of the utility model;

[0047] Figure 8This is a rear view of the filter element connector provided in an embodiment of the present invention;

[0048] Figure 9 yes Figure 8 A cross-sectional view along line AA;

[0049] Figure 10 yes Figure 8 A cross-sectional view along line BB;

[0050] Figure 11 This is another rear view of the filter element connector provided in this embodiment of the utility model;

[0051] Figure 12 This is a top view of the filter element connector provided in this embodiment of the utility model;

[0052] Figure 13 This is an assembly front view of the host water interface and installation components provided in this embodiment of the utility model.

[0053] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0055] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0056] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0057] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0058] like Figures 1 to 5 As shown, the filter element device 100 provided in this embodiment of the present invention is used to connect to a filter host 200. The filter host 200 is provided with a host water interface 201 and a clamping component 202. The filter element device 100 includes a filter element body 101. The filter element body 101 is provided with a filter element water interface 20 in a first direction X. The filter element water interface 20 is used to connect to the host water interface 201 of the filter host 200. The filter element body 101 is also provided with a clamping engagement structure 1013, which is used to connect with the clamping component 202 of the filter host 200 to prevent the filter element water interface 20 from exiting the host water interface 201. Wherein, the first direction X is the radial direction of the filter element body 101, that is, perpendicular to the axial direction of the filter element body 101. Figure 3 The dotted line M in the figure represents the central axis of the filter element body 101.

[0059] The filter element water inlet 20 is located on the first direction X of the filter element body 101, that is, the filter element water inlet 20 is located on the side of the filter element body 101. By setting the locking and fitting structure 1013, the filter element water inlet 20 can be prevented from exiting the main unit water inlet 201, that is, the filter element device 100 is prevented from detaching from the filter main unit 200, thereby improving the firmness of the connection between the filter element device 100 and the filter main unit 200.

[0060] Please see Figure 3 and Figure 6The filter element body 101 has a first flow channel 111, a second flow channel 112, and a third flow channel 113 extending along the second direction Y. The first flow channel 111, the second flow channel 112, and the third flow channel 113 are sequentially nested from the inside out and isolated from each other. Specifically, the second flow channel 112 is arranged around the periphery of the first flow channel 111, and the third flow channel 113 is arranged around the periphery of the second flow channel 112. The filter element water interface 20 includes a first tube 21, a second tube 22, and a third tube 23. The first tube 21, the second tube 22, and the third tube 23 all extend along the first direction X. The first flow channel 111 connects to the inner cavity of the first tube 21, the second flow channel 112 connects to the inner cavity of the second tube 22, and the third flow channel 113 connects to the inner cavity of the third tube 23. The first direction X and the second direction Y are perpendicular. The second direction Y is the axial direction of the filter element body 101.

[0061] Using the above technical solution, the first flow channel 111, the second flow channel 112, and the third flow channel 113 are sequentially nested from the inside out and isolated from each other, and the arrangement of the first flow channel 111, the second flow channel 112, and the third flow channel 113 is relatively regular. The first tube body 21, the second tube body 22, and the third tube body 23 all extend along the first direction X, and the arrangement of the first tube body 21, the second tube body 22, and the third tube body 23 is relatively regular. The first flow channel 111, the second flow channel 112, and the third flow channel 113 extend along the second direction Y, and the first tube body 21, the second tube body 22, and the third tube body 23 extend along the first direction X of the filter element body 101, and the arrangement between the three channels and the three tube bodies is relatively regular. The first flow channel 111 connects to the inner cavity of the first pipe body 21, the second flow channel 112 connects to the inner cavity of the second pipe body 22, and the third flow channel 113 connects to the inner cavity of the third pipe body 23. The first pipe body 21, the second pipe body 22, and the third pipe body 23 are used to connect to the host water interface 201 of the filter host 200. Therefore, the structure of the filter body 101 corresponding to the host water interface 201 and the design of the water flow channels are relatively simple and orderly, which is conducive to the processing and assembly of the filter device 100.

[0062] In one embodiment, the first tube 21, the second tube 22, and the third tube 23 are arranged in parallel. The second tube 22 and the third tube 23 are located on opposite sides of the first tube 21 and are equidistant from the first tube 21. The central axis of the first tube 21 intersects the central axis of the first flow channel 111. This arrangement allows the filter element water inlet 20 to be located in the middle of one side of the filter element body 101, further improving the regularity of the filter element connector 1012 structure.

[0063] Please see Figure 3 and Figure 6The filter element body 101 includes a filter assembly 1011 and a filter element connector 1012. The filter element connector 1012 includes a connector body 10 and a filter element water interface 20. The connector body 10 is connected to one end of the filter assembly 1011, and the filter element water interface 20 is connected to the connector body 10 along a first direction X. A first flow channel 111, a second flow channel 112, and a third flow channel 113 are all disposed in the connector body 10. The filter assembly 1011 has a filter water path, a wastewater path, and an inlet water path. The first flow channel 111 is used to connect the inner cavity of the first pipe 21 and the filter water path, the second flow channel 112 is used to connect the inner cavity of the second pipe 22 and the wastewater path, and the third flow channel 113 is used to connect the inner cavity of the third pipe 23 and the inlet water path. The filter element water interface 20 is connected to the connector body 10 along the first direction X. The first flow channel 111, the second flow channel 112 and the third flow channel 113 are set in the connector body 10, which makes the structure of the filter element connector 1012 simple and orderly, and is conducive to the processing of the filter element connector 1012.

[0064] In a specific application, raw water flows into the third channel 113 from the third pipe 23, then into the inlet water path. After being filtered in the filter assembly 1011, the filtered water flows into the filter water path, and then flows out of the filter element device 100 through the first channel 111 and the first pipe 21. Meanwhile, the wastewater flows into the wastewater path and flows out of the filter element device 100 through the second channel 112 and the second pipe 22.

[0065] In one embodiment, the filter assembly 1011 is cylindrical, and the outer diameter d1 of the filter assembly 1011 is greater than or equal to 50 mm and less than or equal to 130 mm. In specific applications, d1 can be 50 mm, 70 mm, 90 mm, 110 mm, 130 mm, etc.

[0066] Please see Figure 3 , Figures 5 to 7 The connector body 10 includes a central tube 12, a sleeve tube 13, a body 14, and an end cover plate 15. The sleeve tube 13 and the body 14 are sequentially sleeved around the central tube 12 from the inside to the outside, and both extend along the second direction Y. The end cover plate 15 is connected to the end of the central tube 12, the sleeve tube 13, and the body 14 away from the filter assembly 1011. The central tube 12 and the end cover plate 15 enclose a first flow channel 111, the central tube 12, the sleeve tube 13, and the end cover plate 15 enclose a second flow channel 112, and the sleeve tube 13, the body 14, and the end cover plate 15 enclose a third flow channel 113. The first tube 21 is sequentially inserted through the body 14, the sleeve 13, and the central tube 12, so that the first flow channel 111 is connected to the inner cavity of the first tube 21; the second tube 22 is sequentially inserted through the body 14 and the sleeve 13, so that the second flow channel 112 is connected to the inner cavity of the second tube 22; the third tube 23 is inserted through the body 14, so that the third flow channel 113 is connected to the inner cavity of the third tube 23.

[0067] Both the central tube 12 and the sleeve tube 13 are cylindrical, and the ratio of the diameter of the central tube 12 to the diameter of the sleeve tube 13 is 46:75. The diameter of the central tube 12 ranges from 13mm to 33mm, preferably 23mm, and the diameter of the sleeve tube 13 ranges from 27.5mm to 47.5mm, preferably 37.5mm.

[0068] In one embodiment, the distance between the sleeve 13 and the central pipe 12 is less than the shortest distance between the sleeve 13 and the body 14. In specific applications, the wastewater volume is much smaller than the raw water volume. This arrangement ensures that the space occupied by the second flow channel 112 and the third flow channel 113 is reasonably allocated within a limited space, so that the water can flow smoothly in both the second flow channel 112 and the third flow channel 113.

[0069] In one embodiment, the central tube 12 protrudes from the sleeve tube 13 and the body 14 at one end facing the filter assembly 1011. This facilitates a sealed connection between the central tube 12 and the filter assembly 1011.

[0070] In one embodiment, the first tube 21, the second tube 22, and the third tube 23 are attached to the end cover plate 15. This improves the firmness of the connection between the first tube 21, the second tube 22, and the third tube 23 and the connector body 10. Of course, in other embodiments, the first tube 21, the second tube 22, and the third tube 23 may also be spaced apart from the end cover plate 15.

[0071] Please see Figure 3 , Figure 4 and Figure 6 The end cap 15 includes a main body 153 and an extension 154. The main body 153 is connected to the end of the central tube 12, the sleeve tube 13, and the body 14 away from the filter assembly 1011. The extension 154 is connected to the main body 153 along the first direction X. The extension 154 has a recessed structure 155 in the area corresponding to the filter element water interface 20. In specific applications, the connector body 10 and the filter element water interface 20 are integrally molded structures and made of plastic material. By providing a recessed structure 155 in the extension 154, the local thickness of the part where the extension 154 and the filter element water interface 20 are connected can be avoided.

[0072] In one embodiment, the locking and engaging structure 1013 includes a body 14, which is used for the sleeve of the locking component 202 to be flipped or slidably engaged. Thus, the locking and engaging structure 1013 and the filter element water interface 20 are located at the same end of the filter element device 100, allowing the locking component 202 and the main unit water interface 201 to be connected to the same end of the filter element device 100, thereby improving the robustness of the connection between the filter element water interface 20 and the main unit water interface 201.

[0073] It is understood that in other embodiments, the locking structure 1013 may also be located at a different end of the filter element device 100 from the filter element water interface 20, for example, the locking structure 1013 may be located at the end of the filter assembly 1011 away from the filter element connector 1012.

[0074] Please see Figures 2 to 5 The main body 14 has a first outer surface 141, a second outer surface 142, a third outer surface 143, and a fourth outer surface 144, which surround the outer periphery of the main body 14. The first outer surface 141 and the third outer surface 143 are arranged opposite to each other. The filter element water interface 20 is disposed on the first outer surface 141. At least one of the second outer surface 142, the third outer surface 143, and the fourth outer surface 144 is planar. When the clamping member 202 is connected to the clamping mating structure 1013, the inner side of the sleeve is attached to the second outer surface 142, the third outer surface 143, and the fourth outer surface 144. With this arrangement, the clamping member 202 can be sleeved on the filter element connector 1012 without affecting the connection between the filter element water interface 20 and the main unit water interface 201.

[0075] By setting at least one of the second outer surface 142, the third outer surface 143, and the fourth outer surface 144 to be planar, the filter element device 100 can be prevented from rotating when the clamping member 202 is sleeved on the filter element connector 1012. In this embodiment, the second outer surface 142 and the fourth outer surface 144 are both planar and parallel to each other, while the third outer surface 143 is arc-shaped.

[0076] In one embodiment, please refer to Figure 11 and Figure 12 Both the second outer surface 142 and the fourth outer surface 144 are planar, and the distance l1 between the second outer surface 142 and the fourth outer surface 144 is greater than or equal to 66 mm, and / or the height h of the body 14 is greater than or equal to 10 mm. This facilitates the design of the flow channel to ensure that the water can flow smoothly in the flow channel.

[0077] The distance between the first outer surface 141 and the third outer surface 143 is greater than or equal to the distance between the second outer surface 142 and the fourth outer surface 144.

[0078] In one embodiment, the locking and engaging structure 1013 further includes a limiting portion disposed on the side of the end cover plate 15 opposite to the filter assembly 1011, the limiting portion being used to limit the locking component 202. By setting the limiting portion to limit the locking component 202, over-fitting of the sleeve can be avoided, which is beneficial for better positioning of the sleeve.

[0079] In one embodiment, the limiting part is a slot 151 or a limiting protrusion. The limiting protrusion can be a bump or a strip, which can limit the movement by contacting the card strip 2024.

[0080] In this embodiment, the limiting part is a slot 151. Specifically, the slot 151 allows the locking strip 2024 of the clamping component 202 to be inserted and connected, thereby limiting the position of the sleeve. By providing the slot 151, when the sleeve is sleeved on the body 14, the locking strip 2024 of the clamping component 202 is inserted into the slot 151, which can prevent the sleeve from being over-sleeved and facilitate better positioning of the sleeve. Specifically, the slot 151 has a first slot 1511, a second slot 1512, and a third slot 1513. The first slot 1511 corresponds to the second outer surface 142, the second slot 1512 corresponds to the fourth outer surface 144, and the third slot 1513 communicates between the first slot 1511 and the second slot 1512 and is opened on the side of the end cover plate 15 facing away from the filter assembly 1011.

[0081] In specific applications, the sleeve includes a first connecting wall 2021, a second connecting wall 2022, and a third connecting wall 2023. The first connecting wall 2021 and the second connecting wall 2022 are arranged opposite to each other. The third connecting wall 2023 and the locking strip 2024 are both connected between the first connecting wall 2021 and the second connecting wall 2022. The third connecting wall 2023 is connected to the same end of the first connecting wall 2021 and the second connecting wall 2022, and the locking strip 2024 is connected to the non-ends of the first connecting wall 2021 and the second connecting wall 2022. When the clamping component 202 is rotated or slidably connected to the clamping engagement structure 1013, the inner side of the first connecting wall 2021 is attached to the second outer surface 142, the inner side of the second connecting wall 2022 is attached to the fourth outer surface 144, the inner side of the third connecting wall 2023 is attached to the third outer surface 143, and the clamping strip 2024 is inserted into the clamping groove 151 from the third slot 1513 and extends out of the clamping groove 151 from the first slot 1511 and the second slot 1512.

[0082] Alternatively, in another embodiment, the locking component 202 includes a first connecting wall 2021, a second connecting wall 2022, and a locking strip 2024, with the locking strip 2024 connected to the same end of the first connecting wall 2021 and the second connecting wall 2022. When the locking component 202 is rotatably or slidably connected to the locking engagement structure 1013, the inner side of the first connecting wall 2021 is attached to the second outer surface 142, the inner side of the second connecting wall 2022 is attached to the fourth outer surface 144, and the locking strip 2024 is inserted into the locking groove 151 from the third slot 1513 and extends out of the locking groove 151 from the first slot 1511 and the second slot 1512.

[0083] It should be noted that by providing a slot 151 on the side of the end cover plate 15 facing away from the filter assembly 1011, the locking strip 2024 can be inserted into the slot 151 to limit the locking component 202. In this embodiment, the slot 151 divides the end cover plate 15 into two protrusions. It can be understood that in other embodiments, the end cover plate 15 may also include only one of these two protrusions.

[0084] Please see Figure 3 , Figures 6 to 9 An end cap 15 has a boss 152 on the side of the end cap 15 facing the filter assembly 1011, forming a slot 151 on the side of the end cap 15 facing away from the filter assembly 1011. The boss 152 passes through the central tube 12 along a third direction Z, which is perpendicular to the first direction X and the second direction Y. Since the boss 152 passes through the central tube 12 along the third direction Z, the slot 151 also extends along the third direction Z.

[0085] In one embodiment, the boss 152 has an inner surface 1521 facing the first tube body 21 within the central tube 12. Both ends of the inner surface 1521 intersect the inner wall of the central tube 12. The length of the inner surface 1521 is L1, and the diameter of the central tube 12 is D, where D / 4 ≤ L1 ≤ D. This arrangement prevents the boss 152 from deviating excessively from the side of the central tube 12 away from the first tube body 21, which would be detrimental to the arrangement of the accommodating cavity 171 described below; or, it prevents the boss 152 from deviating excessively from the side of the central tube 12 closer to the first tube body 21, ensuring sufficient space between the boss 152 and the first tube body 21 within the central tube 12, allowing water in the first flow channel 111 to flow smoothly into the inner cavity of the first tube body 21.

[0086] In one embodiment, please refer to Figure 10 and Figure 12 The first tube body 21, the second tube body 22, and the third tube body 23 are flush with each other at the end away from the connector body 10. The distance from the side of the slot 151 near the first tube body 21 to the end of the first tube body 21 away from the connector body 10 is L2, where 15mm≤L2≤90mm. In specific applications, L2 can be 15mm, 30mm, 50mm, 70mm, 90mm, etc.

[0087] In one embodiment, the first tube 21, the second tube 22, and the third tube 23 are arranged in parallel. The second tube 22 and the third tube 23 are located on opposite sides of the first tube 21 and are equidistant from the first tube 21. The central axis of the first tube 21 intersects the central axis of the central tube 12, and the central tube 12 is coaxial with the sleeve tube 13. This arrangement ensures that the central axis of the first tube 21 intersects the central axis of the first flow channel 111, and allows the filter element water interface 20 to be located in the middle of the first outer surface 141, further improving the regularity of the filter element connector 1012 structure.

[0088] In one embodiment, please refer to Figure 10 The distance from the central axis N of the first tube 21 to the inner wall of the second tube 22 facing the first tube 21 is defined as L3, and the radius of the sleeve 13 is R, where L3 < R. This arrangement ensures that the second flow channel 112 is connected to the inner cavity of the second tube 22.

[0089] Please see Figures 2 to 4 The filter element device 100 also includes a locking member 102, which is used to lock the clamping member 202 in a locked state when connected to the clamping engagement structure 1013. In this way, in some cases, when the connection between the clamping member 202 and the clamping engagement structure 1013 is not secure, the clamping member 202 can be prevented from disengaging from the clamping engagement structure 1013.

[0090] In one embodiment, the end face of the connector body 10 is recessed to form a receiving cavity 171. The connector body 10 is also provided with an opening 172 communicating with the receiving cavity 171 in the circumferential direction. The locking member 102 is disposed in the receiving cavity 171, and part of it can extend out of the receiving cavity 171 from the opening 172, protruding from the outer periphery of the connector body 10. This arrangement enables the installation of the locking member 102.

[0091] In one embodiment, the receiving cavity 171 is located on the side of the sleeve 13 away from the filter element water inlet 20. Thus, since the locking member 102 is located on the side of the sleeve 13 away from the filter element water inlet 20, the locking member 102 and the filter element water inlet 20 will not interfere with each other's processing. It is understood that in other embodiments, the receiving cavity 171 may also be located on other sides of the sleeve 13.

[0092] Please see Figure 5 and Figure 6 The connector body 10 also includes multiple reinforcing plates 16, which are connected between the sleeve 13, the body 14, and the end cover plate 15. The multiple reinforcing plates 16 are arranged radially around the sleeve 13, dividing the third flow channel 113 into multiple sub-flow channels, which are interconnected. By setting the reinforcing plates 16, the connection strength between the sleeve 13, the body 14, and the end cover plate 15 can be increased, thereby improving the overall strength of the connector body 10.

[0093] Since multiple reinforcing plates 16 divide the third flow channel 113 into multiple sub-flow channels, and the third pipe body 23 passes through the main body 14, one or two sub-flow channels can communicate with the inner cavity of the third pipe body 23. By setting multiple sub-flow channels to communicate with each other, the raw water flowing in from the third pipe body 23 can flow into each sub-flow channel.

[0094] Please see Figure 3 and Figure 4 The connector body 10 also includes a connecting plate 18 and a connecting ring 19. The connecting plate 18 has a plate-shaped annular structure. The inner edge of the connecting plate 18 is connected to the end of the body 14 away from the end cover plate 15. The connecting ring 19 is connected to the outer edge of the connecting plate 18 and extends away from the body 14 along the second direction Y. The connecting ring 19 is used to be sleeved and connected with the filter assembly 1011.

[0095] The connecting ring 19 is cylindrical, and the ratio of the diameter of the sleeve 13 to the diameter of the connecting ring 19 is 75:194. The diameter of the connecting ring 19 ranges from 87mm to 107mm, preferably 97mm.

[0096] In one embodiment, the connector body 10 and the filter element water interface 20 are integrally formed. This improves the sealing between the pipes and prevents leakage.

[0097] In one embodiment, the first tube 21, the second tube 22, and the third tube 23 have the same diameter. The inner diameter of the first tube 21, the second tube 22, and the third tube 23 are all greater than or equal to 2 mm and less than or equal to 8 mm, and / or, the distance between the central axis of the first tube 21 and the central axis of the second tube 22 is greater than or equal to 11 mm and less than or equal to 19 mm. For specific applications, please refer to [link / reference needed]. Figure 10 and Figure 11 The inner diameters of the second pipe body 22 and the third pipe body 23 are equal to the inner diameter of the first pipe body 21, and are both denoted as d2. The distance between the central axis of the first pipe body 21 and the central axis of the third pipe body 23 is equal to the distance between the central axis of the first pipe body 21 and the central axis of the second pipe body 22, and is both denoted as l2. By setting the inner diameter of each pipe body to be greater than or equal to 2mm and less than or equal to 8mm, the smooth flow of water within the pipe body can be ensured without making the pipe body too large and occupying too much space.

[0098] In one embodiment, please refer to Figure 7 , Figure 12 and Figure 13The first pipe body 21, the second pipe body 22, and the third pipe body 23 have the same pipe diameter and structure. The first pipe body 21 includes a first pipe body 211 and a first connector 212 connected to one end of the first pipe body 211. The first connector 212 is used to connect to the main unit water interface 201. A sealing groove 213 is provided on the outer periphery of the first connector 212 to accommodate a sealing ring. By providing a sealing groove 213 to accommodate the sealing ring, the sealing performance of the connection between the filter element water interface 20 and the main unit water interface 201 can be improved. In specific applications, the structures of the second pipe body 22 and the third pipe body 23 are the same as those of the first pipe body 21. The second pipe body includes a second pipe body and a second connector, and the third pipe body includes a third pipe body and a third connector. Both the second and third connectors have sealing grooves on their outer peripheries. Furthermore, the pipe diameters of all parts of the second and third pipe bodies are the same.

[0099] In one embodiment, the first connector 212 has a first outer diameter and a second outer diameter. The first outer diameter is the distance between the opening of the sealing groove 213 on opposite sides of the first connector 212, and the second outer diameter is the distance between the bottom of the sealing groove 213 on opposite sides of the first connector 212. The first outer diameter is greater than or equal to 6.5 mm and less than or equal to 14.5 mm, and the second outer diameter is greater than or equal to 4.5 mm and less than or equal to 12.5 mm. The outer diameter of the first tube body 211 is greater than or equal to 7.5 mm and less than or equal to 15.5 mm. The second and third connectors also have a first outer diameter and a second outer diameter, and the first outer diameter of each connector is equal, denoted as d3, and the second outer diameter of each second connector is equal, denoted as d4. Furthermore, the outer diameters of the second and third tube bodies are equal to the outer diameter of the first tube body 211, denoted as d5. Further details can be found in the following sections. Figures 1 to 4 This application embodiment also provides a water purifier, including a filter host 200 for connecting the above-mentioned filter cartridge device 100. The filter host 200 has a host water interface 201 for docking with the filter cartridge water interface 20. The filter host 200 also has a clamping component 202 for connecting to the clamping mating structure 1013.

[0100] Please see Figures 1 to 4 The filter unit 200 also includes a mounting component 203, and a locking component 202 is rotatably or slidably connected to the mounting component 203. The locking component 202 has a locked state that can be rotated or slidably connected to the locking engagement structure 1013, and also has an unlocked state that can be reset to disengage from the locking engagement structure 1013. In this embodiment, the locking component 202 is rotatably connected to the mounting component 203. In specific applications, when the locking component 202 is in the locked state, the filter element device 100 cannot be separated from the filter unit 200; when the locking component 202 is in the unlocked state, the filter element device 100 can be disengaged from the filter unit 200.

[0101] In one embodiment, an elastic element (not shown) is provided between the mounting component 203 and the locking component 202. The elastic element is used to keep the locking component 202 rotating in the direction of the unlocked state. In specific applications, when the locking component 202 is connected to the locking engagement structure 1013 and the locking component 102 is in the locked state, the locking component 202 remains in the locked state; when the locking component 102 is in the clearance state, the elastic element causes the locking component 202 to rotate in the direction of the unlocked state, thereby making the locking component 202 in the unlocked state.

[0102] Please see Figures 2 to 4 The main unit water inlet 201 is connected to the mounting component 203. The mounting component 203 includes a first mounting base 2031 and a second mounting base 2032, which are respectively disposed on both sides of the main unit water inlet 201. The clamping component 202 is arc-shaped or U-shaped, and its two sides are rotatably connected to the first mounting base 2031 and the second mounting base 2032, respectively. In this way, the clamping component 202 is rotatably connected to the mounting component 203, and this arrangement ensures that the connection between the main unit water inlet 201 and the filter element water inlet 20 does not affect the connection between the clamping component 202 and the clamping mating structure 1013.

[0103] Please see Figure 2 The clamping component 202 further includes a first rotating shaft 2025 and a second rotating shaft 2026. The first rotating shaft 2025 is connected to the end of the first connecting wall 2021 away from the third connecting wall 2023 and is rotatably connected to the first mounting base 2031. The second rotating shaft 2026 is connected to the end of the second connecting wall 2022 away from the third connecting wall 2023 and is rotatably connected to the second mounting base 2032. This allows the two sides of the clamping component 202 to be rotatably connected to the first mounting base 2031 and the second mounting base 2032, respectively. The first mounting base 2031 and the second mounting base 2032 are each provided with a connecting hole. The first rotating shaft 2025 is rotatably connected to the connecting hole of the first mounting base 2031, and the second rotating shaft 2026 is rotatably connected to the connecting hole of the second mounting base 2032.

[0104] Please see Figure 13The main unit water interface 201 includes a first connecting pipe 2011, a second connecting pipe 2012, and a third connecting pipe 2013. The second connecting pipe 2012 and the third connecting pipe 2013 are respectively located on both sides of the first connecting pipe 2011 and are equidistant from the first connecting pipe 2011. The first connecting pipe 2011 is used to connect to the first pipe body 21, the second connecting pipe 2012 is used to connect to the second pipe body 22, and the third connecting pipe 2013 is used to connect to the third pipe body 23. The first connecting pipe 2011, the second connecting pipe 2012, and the third connecting pipe 2013 have the same diameter. The inner diameter of the first connecting pipe 2011, the second connecting pipe 2012, and the third connecting pipe 2013 are all greater than or equal to 7.5 mm and less than or equal to 15.5 mm, and / or the distance between the central axis of the first connecting pipe 2011 and the central axis of the second connecting pipe 2012 is greater than or equal to 11 mm and less than or equal to 19 mm. In practical applications, the inner diameter of the first connecting pipe 2011 is slightly larger than the first and second outer diameters of the first connector 212, and equal to the outer diameter of the first pipe body 211. Combined with a sealing ring, this allows for a tight connection between the first connecting pipe 2011 and the first pipe body 21. Furthermore, the distance between the central axis of the first connecting pipe 2011 and the central axis of the second connecting pipe 2012 is equal to the distance between the central axis of the first pipe body 21 and the central axis of the second pipe body 22, which helps align each connecting pipe with its corresponding pipe body and improves assembly accuracy.

[0105] The inner diameters of the first connecting pipe 2011, the second connecting pipe 2012, and the third connecting pipe 2013 are equal and are all denoted as d6. The distance between the central axis of the first connecting pipe 2011 and the central axis of the second connecting pipe 2012 is equal to the distance between the central axis of the first connecting pipe 2011 and the central axis of the third connecting pipe 2013 and is denoted as l3.

[0106] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A filter cartridge device, characterized in that, For connection to a filter host, the filter host is provided with a host water interface and a clamping component; the filter element device includes a filter element body, the filter element body is provided with a filter element water interface in a first direction, the filter element water interface is used to connect to the host water interface, the filter element body is also provided with a clamping engagement structure, the clamping engagement structure is used to connect with the clamping component to prevent the filter element water interface from retracting from the host water interface; The filter element body has a first flow channel, a second flow channel, and a third flow channel extending along a second direction. The first flow channel, the second flow channel, and the third flow channel are sequentially nested from the inside out and isolated from each other. The filter element water interface includes a first tube, a second tube, and a third tube. The first tube, the second tube, and the third tube all extend along the first direction. The first flow channel connects to the inner cavity of the first tube, the second flow channel connects to the inner cavity of the second tube, and the third flow channel connects to the inner cavity of the third tube. The first direction and the second direction are perpendicular to each other.

2. The filter element device as described in claim 1, characterized in that, The second tube and the third tube are located on opposite sides of the first tube and are equidistant from the first tube. The central axis of the first tube intersects the central axis of the first flow channel.

3. The filter element device as described in claim 1, characterized in that, The filter element body includes a filter assembly and a filter element connector; The filter element connector includes a connector body and a filter element water interface. The connector body is connected to one end of the filter assembly, and the filter element water interface is connected to the connector body along the first direction. The first flow channel, the second flow channel, and the third flow channel are all disposed in the connector body. The filter assembly has a filter water path, a wastewater water path, and an inlet water path. The first flow channel is used to connect the inner cavity of the first pipe body and the filter water path. The second flow channel is used to connect the inner cavity of the second pipe body and the wastewater water path. The third flow channel is used to connect the inner cavity of the third pipe body and the inlet water path.

4. The filter element device as described in claim 3, characterized in that, The connector body includes a central tube, a sleeve tube, a body, and an end cap; the sleeve tube and the body are sequentially sleeved around the central tube from the inside to the outside, and both extend along the second direction; the end cap is connected to the end of the central tube, the sleeve tube, and the body away from the filter assembly; the central tube and the end cap form the first flow channel; the central tube, the sleeve tube, and the end cap form the second flow channel. The sleeve, the body, and the end cover plate together form the third flow channel; The first tube is sequentially inserted through the body, the sleeve, and the central tube, so that the first flow channel communicates with the inner cavity of the first tube; the second tube is sequentially inserted through the body and the sleeve, so that the second flow channel communicates with the inner cavity of the second tube; the third tube is inserted through the body, so that the third flow channel communicates with the inner cavity of the third tube.

5. The filter element device as described in claim 4, characterized in that, The clamping structure includes a limiting part provided on the side of the end cover plate opposite to the filter assembly, the limiting part being used to limit the clamping component; The limiting part is a slot; the end cover plate forms a boss on the side close to the filter assembly to form the slot on the side of the end cover plate opposite to the filter assembly; the boss passes through the central tube along a third direction, which is perpendicular to the first direction and the second direction; The boss has an inner surface facing the first tube body inside the central tube. The two ends of the inner surface of the boss intersect the inner wall of the central tube. The length of the inner surface of the boss is L1, and the diameter of the central tube is D, where D / 4≤L1≤D. The first tube body, the second tube body, and the third tube body are flush with each other at the end away from the connector body. The distance from the side of the slot near the first tube body to the end of the first tube body away from the connector body is L2, where 15mm≤L2≤90mm. The second tube and the third tube are located on opposite sides of the first tube and are equidistant from the first tube. The central axis of the first tube intersects the central axis of the central tube, and the central tube is coaxial with the sleeve tube. The distance from the central axis of the first pipe to the inner wall of the second pipe on the side facing the first pipe is defined as L3, and the radius of the sleeve is R, where L3 < R.

6. The filter element device as described in claim 5, characterized in that, The clamping structure also includes the body, which is used for the sleeve of the clamping component to be flipped or slidably sleeved. The body has a first outer surface, a second outer surface, a third outer surface, and a fourth outer surface, which surround the outer periphery of the body; the first outer surface and the third outer surface are arranged opposite to each other; the filter element water interface is disposed on the first outer surface, and the second outer surface and the fourth outer surface are both planar. When the clamping component is connected to the clamping mating structure, the inner side of the sleeve is in contact with the second outer surface, the third outer surface and the fourth outer surface; The distance between the second outer surface and the fourth outer surface is greater than or equal to 66 mm; and / or the height of the body is greater than or equal to 10 mm.

7. The filter element device as described in claim 4, characterized in that, The distance between the sleeve and the central tube is less than the shortest distance between the sleeve and the body; Alternatively, the central tube may protrude from the sleeve and the body at one end facing the filter assembly; Alternatively, the first tube, the second tube, and the third tube are attached to the end cover plate. The end cover plate includes a main body and an extension. The main body is connected to the central tube, the sleeve tube, and the end of the body away from the filter assembly. The extension is connected to the main body along the first direction. The extension has a recessed structure in the area corresponding to the water interface of the filter element. Alternatively, the filter element device may further include a locking component, which is used to lock the clamping component when it is connected to the clamping engagement structure. The end face of the connector body is recessed to form a receiving cavity. The connector body is also provided with an opening communicating with the receiving cavity in the circumferential direction. The locking component is disposed in the receiving cavity and can partially extend out of the receiving cavity from the opening, protruding from the outer periphery of the connector body. The receiving cavity is located on the side of the sleeve connecting pipe away from the water interface of the filter element. Alternatively, the connector body may further include multiple reinforcing plates, which are connected between the sleeve, the body and the end cover. The multiple reinforcing plates are arranged radially around the sleeve, dividing the third flow channel into multiple sub-flow channels, which are interconnected with each other. Alternatively, the connector body may further include a connecting plate and a connecting ring. The connecting plate has a plate-shaped annular structure. The inner edge of the connecting plate is connected to the end of the body away from the end cover plate. The connecting ring is connected to the outer edge of the connecting plate and extends away from the body along the second direction. The connecting ring is used to sleeve and connect with the filter assembly.

8. The filter element device as described in claim 3, characterized in that, The filter assembly is cylindrical, and the outer diameter of the filter assembly is greater than or equal to 50 mm and less than or equal to 130 mm. And / or, the first pipe body, the second pipe body, and the third pipe body have the same pipe diameter, the inner diameter of the first pipe body, the inner diameter of the second pipe body, and the inner diameter of the third pipe body are all greater than or equal to 2 mm and less than or equal to 8 mm, the distance between the central axis of the first pipe body and the central axis of the second pipe body is greater than or equal to 11 mm and less than or equal to 19 mm; the first pipe body includes a first pipe body and a first connector connected to one end of the first pipe body, the first connector is used to connect to the host water interface, the outer periphery of the first connector is provided with a sealing groove for accommodating a sealing ring, the first connector has a first outer diameter and a second outer diameter, the first outer diameter is the distance between the opening of the sealing groove on opposite sides of the first connector, the second outer diameter is the distance between the bottom of the sealing groove on opposite sides of the first connector, the first outer diameter is greater than or equal to 6.5 mm and less than or equal to 14.5 mm, the second outer diameter is greater than or equal to 4.5 mm and less than or equal to 12.5 mm, and the outer diameter of the first pipe body is greater than or equal to 7.5 mm and less than or equal to 15.5 mm.

9. A water purifier, characterized in that, The filter includes a filter host for connecting to the filter cartridge device as described in any one of claims 1 to 8, the filter host having a host water interface for docking with the filter cartridge water interface; the filter host also has a locking component for connecting to the locking engagement structure.

10. The water purifier as described in claim 9, characterized in that, The host water interface includes a first connecting pipe, a second connecting pipe, and a third connecting pipe. The second connecting pipe and the third connecting pipe are respectively located on both sides of the first connecting pipe and are equidistant from the first connecting pipe. The first connecting pipe is used to connect to the first pipe body, the second connecting pipe is used to connect to the second pipe body, and the third connecting pipe is used to connect to the third pipe body. The first connecting pipe, the second connecting pipe, and the third connecting pipe have the same diameter. The inner diameter of the first connecting pipe, the inner diameter of the second connecting pipe, and the inner diameter of the third connecting pipe are all greater than or equal to 7.5 mm and less than or equal to 15.5 mm, and / or the distance between the central axis of the first connecting pipe and the central axis of the second connecting pipe is greater than or equal to 11 mm and less than or equal to 19 mm.

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