water purifier

Abstract

The application belongs to the technical field of kitchen appliances, and discloses a water purifier. The water purifier comprises a filter core, a mounting shell, a filter core upper cover and a filter seat. The filter core upper cover comprises an outer upper cover and an inner upper cover which are sleeved, a guide protrusion is arranged on the side wall of the inner upper cover, the guide protrusion is slidably inserted into a first guide groove in the mounting shell through a second guide groove arranged on the side wall of the outer upper cover. The filter seat is at least partially located in the mounting shell, and the filter core upper cover abuts against the filter core located in the mounting shell and is inserted into the filter seat. One of the first guide groove and the second guide groove is a spiral guide groove, and the other is a limiting guide groove. The limiting guide groove comprises a first groove and a second groove which are connected at an angle, the first groove extends along the axial direction of the filter core in a straight line or at an angle, the second groove is located downstream of the first groove in the tightening direction of the outer upper cover and is connected to one end of the first groove close to the filter core, the second groove extends along the circumferential direction of the filter core, or the second groove extends along a first direction, and the included angle between the first direction and the circumferential direction of the filter core is less than or equal to 10°.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a water purifier. Background Technology

[0002] Existing water purifier filter cartridges are primarily snap-fit ​​type. This type of cartridge requires rotating the cartridge to separate it from the filter holder, and then pulling it out of the purifier's housing. When replacing the cartridge, the snap-fit ​​design presents challenges because aligning the positioning clips within the filter holder is difficult. Incorrect rotation can lead to leaks. Furthermore, the relatively long axial length of the cartridge requires significant force to rotate, making it difficult for non-professionals to operate and inconvenient for replacement. Additionally, if the axial dimensions of the cartridge differ before and after replacement, the snap-fit ​​structure can easily cause misalignment between the cartridge and the filter holder.

[0003] Therefore, there is an urgent need for a water purifier to solve the above problems. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a water purifier that effectively solves the problem of difficult filter element assembly, simplifies the filter element fixing structure, reduces the size of the water purifier, and expands the compatibility range of filter element and filter base assembly.

[0005] The above-mentioned technical problems are solved by the following technical solutions: A water purifier, including Filter element; The mounting housing has a cavity and a first opening communicating with the cavity, the filter element is located inside the cavity, and a first guide groove is provided on the inner wall of the mounting housing near the first opening; The filter element cover includes an outer cover and an inner cover. The side wall of the outer cover is provided with a second guide groove, and the side wall of the inner cover is provided with a guide protrusion. The inner cover is located inside the outer cover, and the guide protrusion is slidably inserted into the first guide groove through the second guide groove. The filter base is at least partially located within the mounting housing, and the filter element cover presses against the filter element to allow the filter element to be inserted into the filter base; One of the first guide groove and the second guide groove is a spiral guide groove, and the other is a limiting guide groove. The limiting guide groove includes a first groove and a second groove that are connected at an angle. The first groove extends straight or obliquely along the axial direction of the filter element. The second groove is located downstream of the first groove in the tightening direction of the outer cover. The second groove is connected to the end of the first groove near the filter element. The second groove extends along the circumference of the filter element, or the second groove extends along a first direction. The angle between the first direction and the circumference of the filter element is less than or equal to 10°.

[0006] Compared with the prior art, the water purifier of the present invention has the following advantages: The water purifier uses a guide protrusion that moves simultaneously through the spiral guide groove and the first groove. This allows the outer top cover to rotate, driving the inner top cover to move axially into position within the filter element. After the inner top cover has pressed against the filter element, the outer top cover can be rotated again to allow the guide protrusion to insert into the second groove, further ensuring the relative position of the inner and outer top covers remains unchanged. The rotation of the outer top cover allows the inner top cover to move axially relative to the outer top cover within the filter element, thus pressing against the filter element axially. This means that when aligning the filter element with the filter base, there is no need to rotate the filter element, avoiding leakage at the connection point due to incomplete rotation. Furthermore, there is no need for corresponding snap-fit ​​structures at the bottom of the filter element and on the filter base, simplifying the filter element fixing structure and reducing the size of the water purifier. When fixing the filter element, only the filter element cover needs to be rotated, without rotating the entire filter element, making assembly of the water purifier easier and more convenient. In addition, the water purifier uses the combination of guide protrusions, spiral guide grooves and limiting guide grooves to fix the outer top cover, inner top cover and mounting shell. Even when there are differences in the axial dimensions of the filter element, the filter element can be pressed and fixed, which can expand the compatibility range of filter element and filter base assembly.

[0007] In one embodiment, the first groove extends axially along the filter element, and the second groove extends circumferentially along the filter element.

[0008] In one embodiment, the limiting guide groove is disposed on the outer upper cover, and the limiting guide groove further includes a third groove that communicates with the first groove at an angle. The third groove is located upstream of the first groove in the tightening direction of the outer upper cover. The third groove communicates with the other end of the first groove away from the filter element. The third groove extends along the circumference of the filter element, or the third groove extends along a second direction, wherein the angle between the second direction and the circumference of the filter element is less than or equal to 10°.

[0009] In one embodiment, the first groove extends axially along the filter element; and / or, The second groove extends circumferentially along the filter element; and / or, The third groove extends circumferentially along the filter element.

[0010] In one embodiment, the end face of the mounting housing with the first opening is provided with an inlet groove, which communicates with the first guide groove on the inner wall of the mounting housing.

[0011] In one embodiment, the sidewall of the outer cover is provided with a mounting slit, which penetrates the outer cover in the wall thickness direction of the sidewall of the outer cover. One end of the mounting slit extends to the second guide groove, and the other end extends to the opening end of the outer cover. The inner cover is located inside the outer cover through the opening end.

[0012] In one embodiment, the spiral guide groove extends axially in the filter element for a length of L1, and the limiting guide groove extends axially in the filter element for a length of L2, where L1 ≥ L2.

[0013] In one embodiment, a plurality of guide protrusions are provided, and the plurality of guide protrusions are evenly spaced along the circumference of the filter element cover; Multiple first guide grooves are provided, and the multiple first guide grooves are evenly spaced along the circumference of the filter element and correspond one-to-one with the guide protrusions; Multiple second guide grooves are provided, and the multiple second guide grooves are evenly spaced along the circumference of the filter element and correspond one-to-one with the guide protrusions.

[0014] In one embodiment, the inner top cover has a receiving groove on the side facing the filter element, and the water purifier also includes an elastic pad, which is disposed in the receiving groove and protrudes axially from the inner top cover on the filter element, and the elastic pad is used to press against the filter element.

[0015] In one embodiment, one of the inner cover and the filter element is provided with a positioning hole, and the other is provided with a positioning member. The positioning hole is located on the central axis of the filter element, and the positioning member is rotatably inserted into the positioning hole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a water purifier provided in Embodiment 1 of the present invention; Figure 2 This is an exploded view of the water purifier provided in Embodiment 1 of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the filter element and filter element cover from a first perspective provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the filter element and filter element cover from a second perspective provided in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the filter element and filter base provided in Embodiment 1 of the present invention; Figure 7 This is a partial assembly diagram of the filter element cover and mounting shell provided in Embodiment 1 of the present invention; Figure 8 This is a partially exploded structural diagram of the filter element cover and mounting shell provided in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the structure of the filter element cover provided in Embodiment 1 of the present invention; Figure 10 This is an exploded structural diagram of the filter element cover provided in Embodiment 1 of the present invention; Figure 11 This is an exploded structural diagram of the filter element provided in Embodiment 1 of the present invention; Figure 12 This is an exploded view of the water purifier provided in Embodiment 2 of the present invention; Figure 13 This is a schematic diagram of the structure of the filter element cover from a third-view perspective provided in Embodiment 2 of the present invention; Figure 14 This is a schematic diagram of the fourth-view filter element cover provided in Embodiment 2 of the present invention; Figure 15 This is an exploded structural diagram of the filter element cover provided in Embodiment 2 of the present invention; Figure 16 This is a partially exploded structural diagram of the filter element cover and mounting shell provided in Embodiment 2 of the present invention.

[0017] Label Explanation: 1. Filter element; 11. Filter cartridge; 111. Top cover of cartridge; 1110. Positioning hole; 1111. Handle; 112. Cartridge body; 113. Cartridge base; 2. Install the casing; 3. Filter element cover; 31. Outer cover; 311. Handle; 32. Inner cover; 321. Guide protrusion; 322. Positioning element; 323. Receiving groove; 33. Elastic pad; 4. Filter base; 10. Spiral guide groove; 20. Limiting guide groove; 201. First groove; 202. Second groove; 203. Third groove; 30. Inlet slot; 40. Install the slit. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Example 1 like Figure 1 and Figure 2 As shown, the water purifier includes a main body and a mounting bracket. The main body is mounted on the mounting bracket and includes a filter element 1, a mounting shell 2, a filter element cover 3, and a filter base 4.

[0023] like Figures 3 to 6 As shown, the mounting housing 2 has a cavity and a first opening communicating with the cavity. The filter element 1 can be inserted into the cavity through the first opening, while the filter seat 4 is entirely disposed within the cavity, or partially located outside the cavity. After the filter seat 4 is assembled with the mounting housing 2, it can be inserted into the cavity through the second opening communicating with the cavity. The filter element cover 3 passes through the first opening and applies an external force to the filter element 1 in the axial direction, causing the filter element 1 to press against the filter seat 4, thereby connecting the filter element 1 and the filter seat 4 and establishing water passage between them.

[0024] like Figure 7 and Figure 8As shown, in one embodiment, a first guide groove is provided on the inner wall of the mounting shell 2 near the first opening. The first guide groove is a spiral guide groove 10. The filter element cover 3 includes an outer cover 31 and an inner cover 32. A second guide groove is provided on the side wall of the outer cover 31. The second guide groove is a limiting guide groove 20. A guide protrusion 321 is provided on the side wall of the inner cover 32. The inner cover 32 is located inside the outer cover 31. The guide protrusion 321 passes through the limiting guide groove 20. When the filter element cover 3 passes through the first opening, the guide protrusion 321 passing through the limiting guide groove 20 is further slidably inserted into the spiral guide groove 10.

[0025] The limiting guide groove 20 includes a first groove 201 and a second groove 202 that are connected at an angle. The first groove 201 extends straight or obliquely along the axial direction of the filter element 1. The second groove 202 is located downstream of the first groove 201 in the tightening direction of the outer upper cover 31. The second groove 202 is connected to the end of the first groove 201 near the filter element 1. The second groove 202 extends along the circumference of the filter element 1, or the second groove 202 extends along a first direction. The angle between the first direction and the circumference of the filter element 1 is less than or equal to 10°. When the filter element cover 3 is inserted into the first opening, the outer cover 31 can be rotated to tighten the filter element cover 3 onto the mounting shell 2. The outer cover 31 drives the inner cover 32 to move. Since the inner cover 32 and the outer cover 31 are restricted by the limiting guide groove 20, and the inner cover 32 slides in the spiral guide groove 10 at the same time, when the outer cover 31 rotates, the inner cover 32 not only rotates relative to the mounting shell 2 along the spiral guide groove 10, but is also restricted by the relative movement of the inner cover 32 and the outer cover 31, moving along the first groove 201. The first groove 201 is set at an angle to the circumference of the filter element 1, so that the inner cover 32 gradually approaches the filter element 1 along the extension direction of the first groove 201 until the inner cover 32 presses against the filter element 1. The tightening direction of the outer cover 31 is the rotation direction of the outer cover 31 when the filter element cover 3 is tightened onto the mounting shell 2. Depending on the relative positions of the first groove 201 and the second groove 202 on the outer top cover 31, and the different rotation directions of the spiral guide groove 10, the rotation direction of the outer top cover 31 may be counterclockwise or clockwise.

[0026] Then, if the guide protrusion 321 has moved to the end of the first groove 201 connecting to the second groove 202, the outer cover 31 can be rotated further, so that the guide protrusion 321 slides into the second groove 202. Since the second groove 202 and the filter element 1 form a first angle a1 (0°≤a1≤10°), the relative position of the outer cover 31 and the inner cover 32 in the axial direction of the filter element 1 can be further limited to remain unchanged. If the guide protrusion 321 has not yet moved to the end of the first groove 201 connecting to the second groove 202, the outer cover 31 can be pulled away from the filter element 1 to move the guide protrusion 321 to the end of the first groove 201 connecting to the second groove 202. Then, the outer cover 31 can be rotated further to make the guide protrusion 321 slide into the second groove 202, thereby fixing the outer cover 31, the inner cover 32, and the mounting shell 2. That is, when there is a difference in the axial dimensions of the filter element 1, the filter element 1 can also be pressed and fixed.

[0027] The water purifier uses a guide protrusion 321 that moves simultaneously within the spiral guide groove 10 and the first groove 201. This allows the outer top cover 31 to rotate, driving the inner top cover 32 to move axially into position within the filter element 1. After the inner top cover 32 has pressed against the filter element 1, the outer top cover 31 can be rotated again to allow the guide protrusion 321 to insert into the second groove 202, further ensuring that the relative positions of the inner top cover 32 and the outer top cover 31 remain unchanged. The rotation of the outer top cover 31 allows the inner top cover 32 to move axially relative to the outer top cover 31 within the filter element 1, thus pressing against the filter element 1 axially. This eliminates the need to rotate the filter element 1 when connecting it to the filter base 4, preventing leakage at the connection point due to incomplete rotation of the filter element 1. Furthermore, it eliminates the need for corresponding snap-fit ​​structures on the bottom of the filter element 1 and the filter base 4, simplifying the filter element's fixing structure and reducing the size of the water purifier. When fixing the filter element 1, this water purifier only requires rotating the filter element cover 3, without rotating the entire filter element 1, making the assembly of the water purifier more labor-saving and convenient. In addition, the water purifier uses the cooperation of the guide protrusion 321, the spiral guide groove 10 and the limiting guide groove 20 to fix the outer cover 31, the inner cover 32 and the mounting shell 2. That is, even when there are differences in the axial dimensions of the filter element 1, the filter element 1 can be pressed and fixed, which can expand the compatibility range of the filter element 1 and the filter base 4.

[0028] like Figure 9As shown, in one embodiment, the first groove 201 extends along the axial direction of the filter element 1. When the outer upper cover 31 is rotated in the forward direction, the inner upper cover 32 will rotate around the axial direction of the filter element 1 while simultaneously moving closer to the filter element 1 along the axial direction of the filter element 1. When the outer upper cover 31 is rotated in the reverse direction, the inner upper cover 32 will rotate around the axial direction of the filter element 1 while simultaneously moving away from the filter element 1 along the axial direction of the filter element 1. Forward and reverse are two directions of rotation with opposite directions; if one is counterclockwise, the other is clockwise. The forward direction is the same as the rotation direction of the spiral guide groove 10 as observed from the first opening side.

[0029] like Figure 9 As shown, in one embodiment, the first groove 201 extends along the axial direction of the filter element 1, and the second groove 202 extends along the circumferential direction of the filter element 1. The extending direction of the second groove 202 is consistent with the forward rotation direction of the outer top cover 31. When the outer top cover 31 is rotated forward and the inner top cover 32 presses against the filter element 1, the outer top cover 31 can be further rotated. At this time, the position of the inner top cover 32 remains unchanged, while the outer top cover 31 and the inner top cover 32 rotate relative to each other in the circumferential direction of the filter element 1, so that the guide protrusion 321 slides into the second groove 202, thereby fixing the relative position of the outer top cover 31 and the inner top cover 32.

[0030] In one embodiment, the shape of the guide protrusion 321 is not limited to being a cylindrical structure.

[0031] In one embodiment, the spiral guide groove 10 or the limiting guide groove 20 provided on the mounting shell 2 penetrates the wall thickness of the mounting shell 2 to facilitate the processing of the mounting shell 2.

[0032] Optionally, a handle 311 is provided at the end of the outer cover 31 away from the mounting shell 2. The handle 311 can be configured as a strip-shaped protrusion so that the user can apply external force to rotate the outer cover 31 on the strip-shaped protrusion.

[0033] Optionally, such as Figure 8 and Figure 9As shown, the limiting guide groove 20 is disposed on the outer upper cover 31. The limiting guide groove 20 also includes a third groove 203 that is connected to the first groove 201 at an angle. The third groove 203 is located upstream of the first groove 201 in the tightening direction of the outer upper cover 31. The third groove 203 is connected to the other end of the first groove 201 away from the filter element 1. The third groove 203 extends along the circumference of the filter element 1, or the third groove 203 extends along a second direction. The angle between the second direction and the circumference of the filter element 1 is less than or equal to 10°. Before inserting the filter element cover 3 into the first opening, the inner cover 32 can be inserted into the outer cover 31, and the guide protrusion 321 can be slid into the third groove 203. This limits the relative position of the outer cover 31 and the inner cover 32 in the axial direction of the filter element 1. Then, the outer cover 31 is slidably inserted into the first opening, and the guide protrusion 321 is located at the beginning of the spiral guide groove 10. As the outer cover 31 is rotated in the forward direction, the inner cover 32 moves towards one side of the filter element 1. When it is necessary to release the pressure of the filter element cover 3 on the filter element 1, the outer cover 31 can be rotated in the opposite direction. First, the guide protrusion 321 slides out of the second groove 202 and enters the first groove 201. Then, as the outer cover 31 rotates, the guide protrusion 321 moves along the first groove 201 toward the side away from the filter element 1 until the guide protrusion 321 moves to the other end of the first groove 201. Then, the outer cover 31 is rotated again. At this time, the inner cover 32 remains stationary, while the outer cover 31 rotates relative to the inner cover 32, so that the guide protrusion 321 slides into the third groove 203. Since the third groove 203 and the filter element 1 form a second included angle a2 (0°≤a2≤10°) in the circumference, the relative positions of the outer cover 31 and the inner cover 32 in the axial direction of the filter element 1 are fixed, so that the entire filter element cover 3 can be removed.

[0034] In one embodiment, if the third groove 203 is not provided, when the guide protrusion 321 moves to the other end of the first groove 201, that is, the first end of the spiral guide groove 10, the filter element cover 3 can still be pulled outward. Although the outer cover 31 may move relative to the inner cover 32 at this time due to the presence of the first groove 201, it still does not affect the removal of the filter element cover 3.

[0035] like Figure 9 As shown, in one embodiment, the first groove 201 extends along the axial direction of the filter element 1, the second groove 202 extends along the circumferential direction of the filter element 1, and the third groove 203 extends along the circumferential direction of the filter element 1. The extension direction of the third groove 203 is consistent with the reverse rotation direction of the outer upper cover 31. When the outer upper cover 31 is rotated in the reverse direction and the inner upper cover 32 is moved away from the filter element 1, the outer upper cover 31 can be further rotated. At this time, the position of the inner upper cover 32 remains unchanged, while the outer upper cover 31 and the inner upper cover 32 rotate relative to each other in the circumferential direction of the filter element 1, so that the guide protrusion 321 slides into the third groove 203, thereby fixing the relative position of the outer upper cover 31 and the inner upper cover 32.

[0036] Optionally, such as Figure 9As shown, an installation slit 40 is provided on the side wall of the outer top cover 31. The installation slit 40 penetrates the outer top cover 31 in the wall thickness direction. One end of the installation slit 40 extends to the limiting guide groove 20 on the outer top cover 31, and the other end extends to the open end of the outer top cover 31. The outer top cover 31 has a cavity and an open end communicating with the cavity. The inner top cover 32 passes through the outer top cover 31, that is, it is located in the cavity through the open end. Since the guide protrusion 321 is inserted into the limiting guide groove 20, in order to prevent the guide protrusion 321 from detaching from the limiting guide groove 20, the distance between the inner wall of the outer top cover 31 and the outer wall of the inner top cover 32 is less than the length of the guide protrusion 321. The installation slit 40 allows the outer top cover 31 to deform from the installation slit 40 under the action of external force, so that the guide protrusion 321 can be inserted into the limiting guide groove 20.

[0037] In one embodiment, if the installation slit 40 is not provided, an external force needs to be applied to the circumference of the inner top cover 32 to deform it before it is inserted into the cavity of the outer top cover 31. The inner top cover 32 is generally made of plastic and can have a certain degree of elastic deformation. However, the filter element top cover 3 is generally not replaced in daily use, and repeated deformation may shorten its service life.

[0038] Optionally, such as Figure 3 As shown, the end face of the mounting shell 2 with the first opening is provided with an inlet groove 30. The inlet groove 30 communicates with a first guide groove on the inner wall of the mounting shell 2. The first guide groove is a spiral guide groove 10. The inlet groove 30 can be configured to extend along the axial direction of the filter element 1. The length of the inlet groove 30 is the distance between the first end of the spiral guide groove 10 and the end face of the mounting shell 2 with the first opening, so that the guide protrusion 321 can slide from the inlet groove 30 into the spiral guide groove 10.

[0039] In one embodiment, if the inlet groove 30 is not provided, external force needs to be applied to the circumference of the filter element cover 3 to deform it before inserting it into the first opening. The filter element cover 3 is generally made of plastic and can have a certain degree of elastic deformation. However, the filter element cover 3 is generally not replaced in daily use, and repeated deformation may shorten its service life.

[0040] Optionally, the spiral guide groove 10 extends axially in the filter element 1 for a length of L1, and the limiting guide groove 20 extends axially in the filter element 1 for a length of L2, where L1 ≥ L2. When the filter element cover 3 is inserted into the first opening, rotating the outer cover 31 allows the inner cover 32 to move along the extension direction of the spiral guide groove 10 and the extension direction of the limiting guide groove 20. However, due to the size difference of the filter element 1, the axial movement distance of the inner cover 32 may differ between different water purifiers. Therefore, the spiral guide groove 10 can be set as a fixed-size groove, and the axial length of the limiting guide groove 20 in the filter element 1 can be adjusted to the distance that the inner cover 32 needs to move to press against the filter element 1. When the inner cover 32 moves to the end of the first groove 201 near the filter element 1, even if it has not yet moved to the end of the spiral guide groove 10, the filter element cover 3 can no longer rotate relative to the mounting shell 2.

[0041] Optionally, multiple guide protrusions 321 are also provided, and the multiple guide protrusions 321 are evenly spaced along the circumference of the filter element cover 3. For example Figure 10 As shown, multiple limiting guide grooves 20 are provided, which are evenly spaced along the circumference of the filter element 1 and correspond one-to-one with the guide protrusions 321. Multiple spiral guide grooves 10 are also provided, which are evenly spaced along the circumference of the filter element 1 and correspond one-to-one with the guide protrusions 321. One guide protrusion 321 is inserted into one limiting guide groove 20 and one spiral guide groove 10. Multiple guide protrusions 321 rotate synchronously, thereby enabling the multiple guide protrusions 321 to simultaneously drive the inner upper cover 32 at multiple positions, while ensuring the connection strength of the inner upper cover 32, the outer upper cover 31, and the mounting shell 2.

[0042] Optionally, one of the inner cover 32 and the filter element 1 is provided with a positioning hole 1110, and the other is provided with a positioning member 322. The positioning hole 1110 is located on the central axis of the filter element 1, and the positioning member 322 is rotatably inserted into the positioning hole 1110. Figures 4 to 6 As shown, in one embodiment, a positioning member 322 is provided on the side of the inner upper cover 32 facing the filter element 1, and a positioning hole 1110 is provided at the end of the filter element 1 facing the filter element upper cover 3. The cooperation between the positioning member 322 and the positioning hole 1110 is used to prevent the center of the filter element 1 from shifting, so as not to affect the sealing of the water passage between the filter element 1 and the filter seat 4. The positioning hole 1110 is a round hole, and the positioning member 322 is also a cylindrical structure, so that the positioning member 322 inserted in the positioning hole 1110 can still rotate with the inner upper cover 32.

[0043] Optionally, such as Figure 5As shown, the inner top cover 32 has a receiving groove 323 on the side facing the filter element 1. The water purifier also includes an elastic pad 33, which is disposed in the receiving groove 323 and protrudes axially from the inner top cover 32 of the filter element 1. The elastic pad 33 is used to press against the filter element 1. Before the inner top cover 32 abuts against the filter element 1, the elastic pad 33 abuts against the filter element 1 first, and as the inner top cover 32 moves closer to the filter element 1, the elastic pad 33 deforms. The elastic pressure of the elastic pad 33 on the filter element 1 not only allows the filter element 1 to be inserted into the filter base 4 to achieve water circulation, but also avoids damage to the filter element 1 that may be caused by only using the inner top cover 32 to press against the filter element 1. In one embodiment, the elastic pad 33 may be made of silicone material.

[0044] In one embodiment, the receiving groove 323 is an annular groove, and the elastic pad 33 is also an annular structure, with the elastic pad 33 surrounding the positioning member 322.

[0045] In one embodiment, such as Figure 11 As shown, filter element 1 includes a filter element body and a filter cartridge 11, with the filter element body located inside the filter cartridge 11. The filter cartridge 11 includes a cylindrical body 112, with both ends of the cylindrical body 112 being open-ended. A top cover 111 and a base 113 are respectively connected to the two axial ends of the cylindrical body 112. The top cover 111 and the cylindrical body 112 can be integrated into one structure. The filter element body is first installed inside the cylindrical body 112, and then the base 113 is connected to the cylindrical body 112 using a welding process.

[0046] Optionally, such as Figure 6 As shown, a handle 1111 is provided on the top cover 111, and a positioning hole 1110 is provided on the handle 1111. After the filter element 1 has been used for a certain period of time, it needs to be replaced. After removing the top cover 3 of the filter element, the user can pull the handle 1111 to pull the filter element 1 out of the mounting shell 2.

[0047] Example 2 like Figures 12 to 16 As shown, in another embodiment, a first guide groove is provided on the inner wall of the mounting shell 2 near the first opening. The first guide groove is a limiting guide groove 20. The filter element cover 3 includes an outer cover 31 and an inner cover 32. A second guide groove is provided on the side wall of the outer cover 31. The second guide groove is a spiral guide groove 10. A guide protrusion 321 is provided on the side wall of the inner cover 32. The inner cover 32 is located inside the outer cover 31, and the guide protrusion 321 passes through the spiral guide groove 10. When the filter element cover 3 passes through the first opening, the guide protrusion 321 passing through the spiral guide groove 10 is further slidably inserted into the limiting guide groove 20.

[0048] The limiting guide groove 20 includes a first groove 201 and a second groove 202 that are connected at an angle. The first groove 201 extends vertically or obliquely along the axial direction of the filter element 1. The second groove 202 is located downstream of the first groove 201 in the tightening direction of the outer cover 31. The second groove 202 is connected to the end of the first groove 201 near the filter element 1. The second groove 202 extends circumferentially along the filter element 1, or extends along a first direction. The angle between the first direction and the circumferential direction of the filter element 1 is less than or equal to 10°. When the filter element cover 3 is inserted into the first opening, the outer cover 31 can be rotated to tighten the filter element cover 3 onto the mounting shell 2. Since the inner cover 32 and the outer cover 31 are restricted by the spiral guide groove 10, and the inner cover 32 slides simultaneously within the limiting guide groove 20, when the outer cover 31 rotates, the inner cover 32 will only move relative to the mounting shell 2 along the first groove 201. The first groove 201 is set at an angle to the circumference of the filter element 1, so that the inner cover 32 gradually approaches the filter element 1 along the extension direction of the first groove 201 until the inner cover 32 presses against the filter element 1. Then, if the guide protrusion 321 has moved to the end of the first groove 201 that connects to the second groove 202, the outer cover 31 can be further rotated so that the guide protrusion 321 slides into the second groove 202. Since the second groove 202 and the circumference of the filter element 1 form a first angle a1, 0°≤a1≤10°, the relative position of the outer cover 31 and the inner cover 32 in the axial direction of the filter element 1 can be further limited to remain unchanged. If the guide protrusion 321 has moved to the end of the first groove 201 connecting to the second groove 202, and the inner cover 32 has not yet pressed against the filter element 1, the filter element cover 3 can be pulled away from the filter element 1 first, and then the outer cover 31 can be rotated further until the guide protrusion 321 presses against the filter element 1 at the end of the first groove 201 connecting to the second groove 202. Then the outer cover 31 can be rotated further so that the guide protrusion 321 slides into the second groove 202, thereby fixing the outer cover 31, the inner cover 32 and the mounting shell 2. That is, even when there is a difference in the axial dimension of the filter element 1, the filter element 1 can be pressed and fixed.

[0049] The water purifier uses a guide protrusion 321 that moves simultaneously within the spiral guide groove 10 and the first groove 201. This allows the outer top cover 31 to rotate, driving the inner top cover 32 to move axially into position within the filter element 1. After the inner top cover 32 has pressed against the filter element 1, the outer top cover 31 can be rotated again to allow the guide protrusion 321 to insert into the second groove 202, further ensuring that the relative positions of the inner top cover 32 and the outer top cover 31 remain unchanged. The rotation of the outer top cover 31 allows the inner top cover 32 to move axially relative to the outer top cover 31 within the filter element 1, thus pressing against the filter element 1 axially. This eliminates the need to rotate the filter element 1 when connecting it to the filter base 4, preventing leakage at the connection point due to incomplete rotation of the filter element 1. Furthermore, it eliminates the need for corresponding snap-fit ​​structures on the bottom of the filter element 1 and the filter base 4, simplifying the filter element's fixing structure and reducing the size of the water purifier. When fixing the filter element 1, this water purifier only requires rotating the filter element cover 3, without rotating the entire filter element 1, making the assembly of the water purifier more labor-saving and convenient. In addition, the water purifier uses the cooperation of the guide protrusion 321, the spiral guide groove 10 and the limiting guide groove 20 to fix the outer cover 31, the inner cover 32 and the mounting shell 2. That is, even when there are differences in the axial dimensions of the filter element 1, the filter element 1 can be pressed and fixed, which can expand the compatibility range of the filter element 1 and the filter base 4.

[0050] Optionally, such as Figure 16 As shown, the end face of the mounting shell 2 with the first opening is provided with an inlet groove 30. The inlet groove 30 is connected to a first guide groove on the inner wall of the mounting shell 2. The first guide groove is a limiting guide groove 20. Thus, the inlet groove 30 is connected to the first end of the limiting guide groove 20, i.e., the first groove 201. The inlet groove 30 can be configured to extend along the axial direction of the filter element 1. The length of the inlet groove 30 is the distance between the first end of the limiting guide groove 20 and the end face of the mounting shell 2 with the first opening, so that the guide protrusion 321 can slide from the inlet groove 30 into the limiting guide groove 20.

[0051] In one embodiment, if the inlet groove 30 is not provided, external force needs to be applied to the circumference of the filter element cover 3 to deform it before inserting it into the first opening. The filter element cover 3 is generally made of plastic and can have a certain degree of elastic deformation. However, the filter element cover 3 is generally not replaced in daily use, and repeated deformation may shorten its service life.

[0052] Optionally, a mounting slit 40 is provided on the side wall of the outer cover 31. The mounting slit 40 extends through the outer cover 31 in the wall thickness direction. One end of the mounting slit 40 extends to the limiting guide groove 20 on the outer cover 31, and the other end extends to the open end of the outer cover 31. The outer cover 31 has a cavity and an open end communicating with the cavity. The inner cover 32 passes through the outer cover 31, that is, it is located in the cavity through the open end. Since the guide protrusion 321 is inserted into the spiral guide groove 10, in order to prevent the guide protrusion 321 from detaching from the spiral guide groove 10, the distance between the inner wall of the outer cover 31 and the outer wall of the inner cover 32 is less than the length of the guide protrusion 321. The mounting slit 40 allows the outer cover 31 to deform from the mounting slit 40 under the action of external force, so that the guide protrusion 321 can be inserted into the spiral guide groove 10.

[0053] In one embodiment, if the installation slit 40 is not provided, an external force needs to be applied to the circumference of the inner top cover 32 to deform it before it is inserted into the cavity of the outer top cover 31. The inner top cover 32 is generally made of plastic and can have a certain degree of elastic deformation. However, the filter element top cover 3 is generally not replaced in daily use, and repeated deformation may shorten its service life.

[0054] Apart from that, the water purifier in Example 2 is the same as the water purifier in Example 1, and will not be described again here.

[0055] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0056] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A water purifier, characterized in that, include: Filter element (1); The mounting shell (2) has a cavity and a first opening communicating with the cavity. The filter element (1) is located inside the cavity. A first guide groove is provided on the inner wall of the mounting shell (2) near the first opening. The filter element cover (3) includes an outer cover (31) and an inner cover (32). The side wall of the outer cover (31) is provided with a second guide groove, and the side wall of the inner cover (32) is provided with a guide protrusion (321). The inner cover (32) is located inside the outer cover (31), and the guide protrusion (321) slides through the second guide groove and is inserted into the first guide groove. The filter base (4) is at least partially located inside the mounting housing (2), and the filter element cover (3) presses against the filter element (1) so that the filter element (1) is inserted into the filter base (4); One of the first guide groove and the second guide groove is a spiral guide groove (10), and the other is a limiting guide groove (20). The limiting guide groove (20) includes a first groove (201) and a second groove (202) that are connected at an angle. The first groove (201) extends straight or obliquely along the axial direction of the filter element (1). The second groove (202) is located downstream of the first groove (201) in the tightening direction of the outer cover (31). The second groove (202) is connected to one end of the first groove (201) near the filter element (1). The second groove (202) extends along the circumference of the filter element (1), or the second groove (202) extends along a first direction. The angle between the first direction and the circumference of the filter element (1) is less than or equal to 10°.

2. The water purifier according to claim 1, characterized in that: The first groove (201) extends along the axial direction of the filter element (1), and the second groove (202) extends along the circumferential direction of the filter element (1).

3. The water purifier according to claim 1, characterized in that: The limiting guide groove (20) is disposed on the outer upper cover (31). The limiting guide groove (20) also includes a third groove (203) that is connected to the first groove (201) at an angle. The third groove (203) is located upstream of the first groove (201) in the tightening direction of the outer upper cover (31). The third groove (203) is connected to the other end of the first groove (201) away from the filter element (1). The third groove (203) extends along the circumference of the filter element (1) or the third groove (203) extends along a second direction. The angle between the second direction and the circumference of the filter element (1) is less than or equal to 10°.

4. The water purifier according to claim 3, characterized in that: The first groove (201) extends axially along the filter element (1); and / or, The second groove (202) extends circumferentially along the filter element (1); and / or, The third groove (203) extends circumferentially along the filter element (1).

5. The water purifier according to claim 1, characterized in that: The mounting shell (2) has an inlet groove (30) on the end face where the first opening is located. The inlet groove (30) is connected to the first guide groove on the inner wall of the mounting shell (2).

6. The water purifier according to claim 1, characterized in that: The outer cover (31) has a mounting slit (40) on its side wall. The mounting slit (40) penetrates the outer cover (31) in the wall thickness direction of the side wall. One end of the mounting slit (40) extends to the second guide groove, and the other end extends to the opening end of the outer cover (31). The inner cover (32) is located inside the outer cover (31) through the opening end.

7. The water purifier according to claim 1, characterized in that: The spiral guide groove (10) extends for a length of L1 in the axial direction of the filter element (1), and the limiting guide groove (20) extends for a length of L2 in the axial direction of the filter element (1), where L1 ≥ L2.

8. The water purifier according to claim 1, characterized in that: Multiple guide protrusions (321) are provided, and the multiple guide protrusions (321) are evenly spaced along the circumference of the filter element cover (3); Multiple first guide grooves are provided, and the multiple first guide grooves are evenly spaced along the circumference of the filter element (1) and correspond one-to-one with the guide protrusions (321); Multiple second guide grooves are provided, and the multiple second guide grooves are evenly spaced along the circumference of the filter element (1) and correspond one-to-one with the guide protrusions (321).

9. The water purifier according to any one of claims 1 to 8, characterized in that: The inner top cover (32) is provided with a receiving groove (323) on the side facing the filter element (1). The water purifier also includes an elastic pad (33), which is disposed in the receiving groove (323) and protrudes from the inner top cover (32) in the axial direction of the filter element (1). The elastic pad (33) is used to press against the filter element (1).

10. The water purifier according to any one of claims 1 to 8, characterized in that: One of the inner cover (32) and the filter element (1) is provided with a positioning hole (1110), and the other is provided with a positioning element (322). The positioning hole (1110) is located on the central axis of the filter element (1), and the positioning element (322) is rotatably inserted into the positioning hole (1110).

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