Filter element and water purifier

Abstract

The filter element comprises a filter bottle and a water filtering structure arranged in the filter bottle, one end of the filter bottle is provided with a bottle cap assembly, the bottle cap assembly comprises an outer cap, a water passing seat and a limiting part, the outer cap is connected with the filter bottle, the water passing seat is provided with a raw water inlet, a pure water discharge outlet and a waste water discharge outlet, and the limiting part is connected with the outer cap. The outer cover is provided with a mounting hole penetrating through the inner side and the outer side, the water passing seat is assembled in the mounting hole and can rotate relative to the outer cover, and the limiting piece is used for pressing the water passing seat on the outer cover so as to limit the axial movement of the water passing seat along the mounting hole. The filter element is simple in structure, low in element replacement cost and convenient and fast in element replacement process, and the water passing seat cannot synchronously rotate along with the outer cover in the process that the outer cover rotates relative to the filter element seat, so that stable and reliable insertion of each water opening is ensured, a good sealing effect can be obtained, and the water leakage risk is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purifying device, in particular to a filter element and a water purifier. BACKGROUND

[0002] The water purifier is mainly used for filtering and purifying water to make the water quality reach the safe and healthy drinking standard. With the gradual attention to the health of drinking water, the household water purifier has gradually become an indispensable daily necessity in people's life.

[0003] The key component of the household water purifier is the filter element. As a consumable, the filter element needs to be replaced after a period of use. Therefore, the filter element is generally detachably fixed to the filter element seat of the water purifier. At present, there are mainly two kinds of detachable connection and fixing structures of the filter element and the filter element seat: one is that the filter element is installed and fixed on the filter element seat by an axial insertion manner. After the filter element is inserted on the filter element seat, the chuck on the filter element seat is clamped and fixed. This way can obtain a better sealing effect between the inserted water ports of the filter element and the filter element seat. However, the disadvantage is that the chuck needs to be arranged on the filter element seat, and a pressing mechanism for locking and unlocking the filter element by operating the chuck is needed, which is complex in structure and high in cost. The other is that the filter element is installed and fixed on the filter element seat by a rotary clamping manner. The structure is simple, the cost is low, and the filter element replacement process is convenient and fast. However, the disadvantage is that during the rotary clamping process of the filter element, the multiple water ports such as the raw water port, the pure water port and the waste water port arranged on the filter element will rotate synchronously with the filter element. Therefore, these water ports and the filter element seat cannot be connected in the inserted manner, but can only be connected in the end face abutting manner, which leads to poor sealing effect and high risk of water leakage. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a filter element and a water purifier to solve the technical problems of complex filter element installation structure, high filter element replacement cost, inconvenient filter element disassembly and poor sealing performance in the existing household water purifier.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A filter element, comprising a filter bottle and a filter water structure arranged in the filter bottle, one end of the filter bottle is provided with a bottle cap assembly, the bottle cap assembly comprises an outer cap, a water passing seat and a limiting piece, the outer cap is connected with the filter bottle, the water passing seat is provided with a raw water inlet, a pure water discharge port and a waste water discharge port, the outer cap is provided with a mounting hole penetrating through the inner and outer sides, the water passing seat is assembled in the mounting hole and can rotate relative to the outer cap, and the limiting piece is used for pressing and holding the water passing seat on the outer cap to limit the axial movement of the water passing seat along the mounting hole.

[0007] The filter element provided by the present application further comprises the following additional technical features:

[0008] The limiting piece is connected to the inner side of the outer cover, the outer wall of the water passing seat is provided with a protruding limiting rib, the inner wall of the mounting hole is provided with a stop rib, the limiting piece abuts against the limiting rib and holds the limiting rib on the stop rib.

[0009] The limiting piece is sleeved on the water passing seat, the limiting piece is provided with a plurality of limiting convex points arranged in the circumferential direction, and the limiting piece abuts against the limiting rib through the limiting convex points.

[0010] The inner side of the outer cover is provided with a sink groove surrounding the mounting hole, and the limiting piece is embedded in the sink groove and abuts against the side wall of the sink groove in the radial direction.

[0011] The bottom wall of the sink groove is provided with a screw column, the limiting piece is provided with a screw hole, and the screw column and the screw hole are connected through a screw; and / or, the sink groove is provided with a foolproof convex, and the limiting piece is provided with a foolproof groove matched with the foolproof convex.

[0012] The water passing seat is provided with a raw water inlet channel, a pure water outlet channel and a waste water outlet channel, the raw water inlet channel communicates the raw water inlet with the water inlet of the water filtering structure, the pure water outlet channel communicates the pure water outlet of the water filtering structure with the pure water discharge port, and the waste water outlet channel communicates the waste water outlet of the water filtering structure with the waste water discharge port, the pure water outlet channel and the waste water outlet channel extend along the axial direction of the water passing seat, and the raw water inlet channel extends in a direction perpendicular to the axial direction of the water passing seat.

[0013] The water passing seat comprises a bottom plate, an outer ring wall surrounding the bottom plate and an inner ring wall arranged in the outer ring wall, the raw water inlet, the pure water discharge port and the waste water discharge port are arranged on the bottom plate, the pure water outlet channel is formed in the inner part of the inner ring wall, and the waste water outlet channel is formed between the outer ring wall and the inner ring wall.

[0014] The limiting piece and the inner side of the outer cover form a water passing cavity, the water passing cavity is arranged around the water passing seat, the raw water inlet channel communicates the water passing cavity, the limiting piece is provided with a water passing hole for communicating the water passing cavity with the water inlet of the water filtering structure, and a plurality of water passing holes are uniformly distributed along the circumferential direction of the limiting piece.

[0015] The first check valve is arranged in the raw water inlet, the first check valve is limited by a first stop piece connected with the water passing seat; and / or, the second check valve is arranged in the pure water discharge port, the second check valve is limited by a second stop piece connected with the water passing seat; and / or, the third check valve is arranged in the waste water discharge port, and the third check valve is limited by a third stop piece connected with the water passing seat.

[0016] The water purifier provided by the application comprises a water path plate, a filter core seat is arranged on the water path plate, the filter core seat is provided with a raw water inlet, a pure water outlet and a waste water outlet, the water purifier further comprises the filter core as described above, the raw water inlet is inserted into the raw water inlet in a first direction, the pure water outlet is inserted into the pure water outlet in the first direction, the waste water outlet is inserted into the waste water outlet in the first direction, and the outer cover is rotationally connected with the filter core seat.

[0017] Thanks to the above technical solutions, the application has at least the following technical effects:

[0018] 1. The filter core provided by the application can be installed on a household water purifier, wherein the water passing seat provided with the raw water inlet, the pure water outlet and the waste water outlet can be used to be connected with the water inlets on the filter core seat of the household water purifier. Since the water passing seat is matched with the mounting hole and can rotate relative to the outer cover, the filter core can be rotationally connected with the filter core seat, and the connection mode of the water passing seat, for example, the outer cover can be rotationally connected with the filter core seat, so that the raw water inlet, the pure water outlet and the waste water outlet on the water passing seat are inserted into the water inlets on the filter core seat one by one, which is simple in structure, low in cost, convenient and fast in replacing the filter core. Moreover, in this way, the outer cover does not rotate synchronously with the water passing seat during the rotation relative to the filter core seat, so as to ensure that the water passing seat is stably and reliably inserted into the water inlets on the filter core seat, and a good sealing effect can be obtained through the insertion into the water inlets, thereby greatly reducing the risk of water leakage. In addition, the limiting piece presses and holds the water passing seat on the outer cover to limit the axial movement of the water passing seat along the mounting hole, so that the water passing seat is prevented from moving axially along the mounting hole due to the water pressure when the filter core is assembled with the filter core seat, and the reliable insertion of the water passing seat into the filter core seat is ensured.

[0019] 2. As a preferred mode of the application, the limiting piece abuts against the limiting rib and presses and holds the limiting rib on the stop rib, so as to limit the axial movement of the water passing seat along the mounting hole, which is simple in structure and reliable in limiting. Moreover, the contact area of the water passing seat with the limiting piece and the outer cover is small, so that the sliding friction force generated when the outer cover rotates relative to the water passing seat is effectively reduced, and the outer cover is more labor-saving when it rotates relative to the filter core seat to install or dismount the filter core.

[0020] Further, the limiting piece is sleeved on the water passing seat, which can limit the water passing seat in the axial direction and in the radial direction, thereby improving the installation reliability of the water passing seat. The limiting piece abuts against the limiting rib through the limiting convex points, which helps to reduce the contact area of the limiting piece and the water passing seat, thereby further reducing the sliding friction force generated when the outer cover rotates relative to the water passing seat, and the outer cover is more labor-saving when it rotates relative to the filter core seat to install or dismount the filter core.

[0021] 3. As a preferred mode of the present application, by extending the pure water outlet channel and the waste water outlet channel along the axial direction of the water passing seat, and extending the raw water inlet channel along a direction perpendicular to the axial direction of the water passing seat, the pure water and waste water discharged by the water filtering structure mainly flow along the axial direction of the water passing seat, and the raw water entering the water passing seat changes direction and flows to the side of the water passing seat along a direction perpendicular to the axial direction of the water passing seat, which is more suitable for the water filtering structure commonly seen on the market, which has a raw water inlet on the outer periphery and a pure water outlet in the center. When the water filtering structure is coaxially arranged with the water passing seat, the raw water flowing to the side of the water passing seat is more easily guided to the side of the water filtering structure to enter the water filtering structure, and the pure water and waste water discharged from the end of the water filtering structure can also directly enter the water passing seat, thereby optimizing the water path design inside the filter element and improving the compactness of the structure.

[0022] Further, the water passing cavity formed by the limiting member and the outer cover is arranged around the water passing seat, so that the raw water entering the filter element can be uniformly dispersed in the circumferential direction in the water passing cavity before being diffused towards the water filtering structure through the water passing hole, thereby using as much as possible of each part of the water filtering structure for filtering, avoiding the raw water being concentrated in a certain part of the water filtering structure for filtering, and helping to improve the filtering efficiency. Moreover, by arranging the water passing cavity around the water passing seat, it can be ensured that the raw water inlet channel is in communication with the water passing cavity regardless of any relative rotation between the outer cover and the water passing seat. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0024] Figure 1 An assembly view of the filter element provided by the embodiments of the present application;

[0025] Figure 2 A sectional view of the filter element provided by the embodiments of the present application Figure 1 , in which the arrows schematically represent the water flow direction of the filter element;

[0026] Figure 3 An enlarged view of part A in Figure 2 ;

[0027] Figure 4 A sectional view of the filter element provided by the embodiments of the present application Figure 2 ;

[0028] Figure 5 An enlarged view of part B in Figure 4 ;

[0029] Figure 6 An assembly view of the bottle cap assembly provided by the embodiments of the present application;

[0030] Figure 7 A cross-section of the bottle cap assembly provided by the embodiment of the present application Figure 1 ;

[0031] Figure 8 A cross-section of the bottle cap assembly provided by the embodiment of the present application Figure 2 ;

[0032] Figure 9 A structure diagram of the outer cover provided by the embodiment of the present application Figure 1 ;

[0033] Figure 10 A structure diagram of the outer cover provided by the embodiment of the present application Figure 2 ;

[0034] Figure 11 A structure diagram of the limiting piece provided by the embodiment of the present application Figure 1 ;

[0035] Figure 12 A structure diagram of the limiting piece provided by the embodiment of the present application Figure 2 ;

[0036] Figure 13 A structure diagram of the water passing seat provided by the embodiment of the present application Figure 1 ;

[0037] Figure 14 A structure diagram of the water passing seat provided by the embodiment of the present application Figure 2 ;

[0038] Figure 15 A structure diagram of the water passing seat provided by the embodiment of the present application Figure 3 ;

[0039] Figure 16 A structure diagram of the water path board provided by the embodiment of the present application.

[0040] List of components and reference numerals:

[0041] 1 filter bottle

[0042] 2 water filtering structure, 21 water inlet, 22 pure water outlet, 23 waste water outlet

[0043] 3 outer cover, 31 mounting hole, 32 stop rib, 33 sink, 34 screw column, 35 foolproof convex, 36 screw convex

[0044] 4 water passing seat, 41 raw water inlet channel, 42 pure water outlet channel, 43 waste water outlet channel, 44 bottom plate, 441 raw water inlet, 442 pure water discharge port, 443 waste water discharge port, 45 outer ring wall, 451 first limiting rib, 452 second limiting rib, 46 inner ring wall

[0045] 5 limit piece, 51 limit bump, 52 screw hole, 53 fool-proof groove, 54 water passing hole;

[0046] 6 water passing cavity;

[0047] 71 first check valve, 72 second check valve, 73 third check valve;

[0048] 81 first stopper, 82 second stopper, 83 third stopper;

[0049] 9 waterway plate, 91 filter element seat, 92 raw water inlet, 93 pure water outlet, 94 waste water outlet, 95 screw groove. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0051] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0052] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation to the present application.

[0053] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0055] In the embodiments of the present application, a filter element and a water purifier are provided. For the purpose of illustration and understanding, the following content provided by the present application is described on the basis of the structure of the product. Of course, those skilled in the art can understand that the above structure is only a specific example and illustrative description, and cannot constitute a specific limitation on the technical solutions provided by the present application.

[0056] As shown in Figures 1 to 15 A filter element provided by the present application includes a filter bottle 1 and a filter water structure 2 arranged in the filter bottle 1. One end of the filter bottle 1 is provided with a bottle cap assembly, which includes an outer cap 3, a water passing seat 4, and a limiting piece 5. The outer cap 3 is connected with the filter bottle 1. The water passing seat 4 is provided with a raw water inlet 441, a pure water discharge port 442, and a waste water discharge port 443. The outer cap 3 is provided with a mounting hole 31 penetrating through the inner and outer sides. The water passing seat 4 is assembled in the mounting hole 31 and can rotate relative to the outer cap 3. The limiting piece 5 is used to press and hold the water passing seat 4 on the outer cap 3 to limit the axial movement of the water passing seat 4 along the mounting hole 31.

[0057] It should be noted that the filter water structure 2 is not limited in the present application. It can be a single material structure, such as activated carbon, RO membrane, carbon fiber, etc. It can also be a composite structure, for example, a composite structure composed of activated carbon and RO membrane, etc. In addition, the limiting piece 5 can be arranged on the inner side of the outer cap 3. The following description is based on the scheme that the limiting piece 5 is arranged on the inner side of the outer cap 3. Of course, the limiting piece 5 can also be arranged on the outer side of the outer cap 3, which can also form axial limiting for the water passing seat 4 in the mounting hole 31.

[0058] The filter element provided by the application can be applied to a household water purifier as a whole, and of course, has reference significance for other water purification equipment. The water passing seat 4 provided with the raw water inlet 441, the pure water discharge port 442 and the waste water discharge port 443 can be used to dock with the water ports on the filter element seat 91 of the household water purifier, and respectively used for inletting raw water, outletting pure water and outletting waste water. Since the application cooperates the water passing seat 4 in the mounting hole 31 and enables the water passing seat 4 to rotate relative to the outer cover 3, the filter element can be rotatably connected with the filter element seat of the household water purifier, and the water passing seat 4 is connected in a plug-in manner, for example, the outer cover 3 can be rotatably connected with the filter element seat, so that the raw water inlet 441, the pure water discharge port 442 and the waste water discharge port 443 on the water passing seat 4 are plugged in one-to-one with the water ports on the filter element seat, which is simple in structure, low in cost, and also makes the filter replacement process convenient and fast. Moreover, in this way, the water passing seat 4 does not rotate synchronously with the outer cover 3 during the rotation of the outer cover 3 relative to the filter element seat, thereby ensuring stable and reliable plugging with each water port on the filter element seat, and through the plugging with each water port, a better sealing effect can be obtained, and the risk of water leakage is greatly reduced. In addition, the limiting piece 5 presses and holds the water passing seat 4 on the outer cover 3 to limit the axial movement of the water passing seat 4 along the mounting hole 31, so that in the assembled state of the filter element and the filter element seat, the water passing seat 4 is effectively prevented from moving axially along the mounting hole 31 due to the action of water pressure, and the reliable plugging of the water passing seat 4 with the filter element seat is ensured. In the preferred embodiment, in order to ensure the sealing between the water passing seat 4 and the outer cover 3, at least one elastic sealing ring can be arranged between the water passing seat 4 and the inner wall of the mounting hole 31, which not only plays a sealing role, but also forms an elastic damping between the outer cover 3 and the water passing seat 4, improving the harsh feeling when the two rotate relative to each other. In addition, in order to facilitate the plugging of the water passing seat 4 with the filter element seat, the raw water inlet 441, the pure water discharge port 442 and the waste water discharge port 443 can be arranged together on the same end face of the water passing seat 4, and the three ports can be arranged in a straight line or in a triangular shape, or other arrangement ways.

[0059] As a preferred embodiment, the limiting piece 5 and the outer cover 3 reversely press and hold the water passing seat 4, Figure 6 、 Figure 7 and Figure 13As shown, on the basis that the limiting piece 5 is connected to the inner side of the outer cover 3, the outer wall of the water passing seat 4 is provided with a protruding limiting rib, the inner wall of the mounting hole 31 is provided with a stop rib 32, and the limiting piece 5 abuts against the limiting rib and holds the limiting rib on the stop rib 32. Specifically, the outer wall of the water passing seat 4 can be provided with only one limiting rib, so that the limiting piece 5 and the stop rib 32 abut against both sides of the limiting rib. As a preferred embodiment, the limiting rib can be two, including a first limiting rib 451 and a second limiting rib 452 which are spaced along the axial direction, the limiting piece 5 abuts against the first limiting rib 451 and holds the second limiting rib 452 on the stop rib 32, thereby increasing the distance between the positions where the limiting piece 5 and the stop rib 32 abut against the limiting rib, which helps to improve the limiting reliability. As can be understood by those skilled in the art, by making the limiting piece 5 and the stop rib 32 abut against the first limiting rib 451 and the second limiting rib 452, the movement of the water passing seat 4 along the axial direction of the mounting hole 31 is limited, which is simple in structure and reliable in limiting. Moreover, the contact area of the water passing seat 4 with the limiting piece 5 and the outer cover 3 is small, which can effectively reduce the sliding friction force generated when the outer cover 3 rotates relative to the water passing seat 4, so that the outer cover 3 is more labor-saving when it is rotated relative to the filter element seat to install or remove the filter element. In order to improve the limiting reliability, the first limiting rib 451 and the second limiting rib 452 can both extend along the circumferential direction of the water passing seat 4, so that the limiting piece 5 and the outer cover 3 axially limit the water passing seat 4 around the water passing seat 4.

[0060] As a preferred embodiment, as shown in Figure 6 、 Figure 7 、 Figure 11 and Figure 12 , the limiting piece 5 is sleeved on the water passing seat 4, the limiting piece 5 is provided with a plurality of limiting protrusions 51 arranged along the circumferential direction, and the limiting piece 5 abuts against the limiting rib through the limiting protrusions 51. Specifically, taking the limiting rib including the first limiting rib 451 and the second limiting rib 452 which are spaced along the axial direction as an example, the limiting piece 5 abuts against the first limiting rib 451 through the limiting protrusions 51. As can be understood by those skilled in the art, the limiting piece 5 is sleeved on the water passing seat 4, which not only limits the water passing seat 4 in the axial direction, but also limits the water passing seat 4 in the radial direction, thereby improving the installation reliability of the water passing seat 4; the limiting piece 5 holds the first limiting rib 451 through the limiting protrusions 51, which helps to reduce the contact area of the limiting piece 5 with the water passing seat 4, thereby further reducing the sliding friction force generated when the outer cover 3 rotates relative to the water passing seat 4, so that the outer cover 3 is more labor-saving when it is rotated relative to the filter element seat to install or remove the filter element.

[0061] Further, as shown in Figure 7 、 Figure 8 and Figure 9As shown, the inner side of the outer cover 3 is provided with a sink groove 33 surrounding the mounting hole 31, and the limiting piece 5 is embedded in the sink groove 33 and abuts against the side wall of the sink groove 33 in the radial direction. The sink groove 33 provides a mounting space and a mounting guide for the limiting piece 5, so that the limiting piece 5 is convenient to install, and when the limiting piece 5 abuts against the inner wall of the sink groove 33, the limiting piece 5 can be radially limited by the outer cover 3, so as to avoid the radial movement of the limiting piece 5, and in the state that the limiting piece 5 is sleeved on the water passing seat 4, the water passing seat 4 can also be radially blocked and limited.

[0062] As a preferred embodiment, as shown in Figure 6 , Figure 9 and Figure 11 , the bottom wall of the sink groove 33 is provided with a screw column 34, and the limiting piece 5 is provided with a screw hole 52, and the screw column 34 and the screw hole 52 are connected by screwing, so as to ensure that the limiting piece 5 and the outer cover 3 are detachable and connected stably and reliably, and the limiting reliability of the water passing seat 4 is improved, and the pressing force of the outer cover 3 and the limiting piece 5 on the water passing seat 4 can also be adjusted by the tightness of the screwing. As an alternative embodiment, the outer cover 3 and the limiting piece 5 can also be connected in other ways, such as buckle connection, threaded connection, etc.

[0063] As a preferred embodiment, as shown in Figure 6 , Figure 9 and Figure 11 , the sink groove 33 is provided with a foolproof convex 35, and the limiting piece 5 is provided with a foolproof groove 53 matched with the foolproof convex 35, so as to improve the convenience of assembling the limiting piece 5 in the sink groove 33, and avoid misassembly.

[0064] As a preferred embodiment of the present application, as shown in Figures 2 to 8 , the water passing seat 4 is provided with a raw water inlet channel 41, a pure water outlet channel 42 and a waste water outlet channel 43, the raw water inlet channel 41 communicates the raw water inlet 441 with the water inlet 21 of the water filtering structure 2, the pure water outlet channel 42 communicates the pure water outlet 22 of the water filtering structure 2 with the pure water discharge port 442, and the waste water outlet channel 43 communicates the waste water outlet 23 of the water filtering structure 2 with the waste water discharge port 443, the pure water outlet channel 42 and the waste water outlet channel 43 extend along the axial direction of the water passing seat 4, and the raw water inlet channel 41 extends along the direction perpendicular to the axial direction of the water passing seat 4. Specifically, Figure 2The arrows shown in the figure schematically represent the water flow direction of the filter element, including the flow path of raw water after entering the raw water inlet 441 and the flow path of the pure water and waste water produced after being filtered by the filter water structure 2. The pure water is discharged from the center of the filter water structure 2, and the waste water is discharged around the periphery of the pure water. Those skilled in the art can understand that by extending the pure water outlet channel 42 and the waste water outlet channel 43 along the axial direction of the water seat 4, and extending the raw water inlet channel 41 along a direction perpendicular to the axial direction of the water seat 4, the pure water and waste water produced by the filter water structure 2 mainly flow and discharge along the axial direction of the water seat 4, and the raw water changes direction after entering the water seat 4 and flows to the side of the water seat 4 along a direction perpendicular to the axial direction of the water seat 4. This more matches the filter water structure commonly seen on the market, which has a peripheral raw water inlet and a central pure water outlet. When the filter water structure 2 is coaxially arranged with the water seat 4, the raw water flowing to the side of the water seat 4 is more easily guided to the side of the filter water structure 2 to enter the filter water structure 2, and the pure water and waste water discharged from the end of the filter water structure 2 can also directly enter the water seat 4, thereby optimizing the internal waterway design of the filter element and improving the compactness of the structure.

[0065] As a preferred embodiment, as shown in Figure 7 、 Figure 8 、 Figure 14 and Figure 15 , the water seat 4 includes a bottom plate 44, an outer ring wall 45 surrounding the bottom plate 44, and an inner ring wall 46 provided inside the outer ring wall 45. The raw water inlet 441, the pure water discharge port 442, and the waste water discharge port 443 are all provided on the bottom plate 44. The pure water outlet channel 42 is formed inside the inner ring wall 46, and the waste water outlet channel 43 is formed between the outer ring wall 45 and the inner ring wall 46. Since most filter water structures on the market generally discharge pure water from the central pure water outlet and waste water from the peripheral waste water outlet, forming the pure water outlet channel 42 inside the inner ring wall 46 facilitates the direct docking of the inner ring wall 46 with the central pure water outlet 22 of the filter water structure 2. Forming the waste water outlet channel 43 between the outer ring wall 45 and the inner ring wall 46 allows the waste water outlet channel 43 to be arranged around the pure water outlet channel 42, thereby facilitating the docking of the waste water outlet 23 of the filter water structure 2 with the waste water outlet channel 43. The raw water inlet 441, the pure water discharge port 442, and the waste water discharge port 443 are concentrated on the bottom plate 44, which is compactly arranged and facilitates the insertion of these three water ports in the same direction with the water ports on the filter element seat to improve the convenience of replacing the filter element.

[0066] As a preferred embodiment, as shown in Figure 8 and Figure 11As shown, the limiting piece 5 and the inner side of the outer cover 3 form a water passing cavity 6, the water passing cavity 6 surrounds the water passing seat 4, the raw water inlet channel 41 communicates with the water passing cavity 6, the limiting piece 5 is provided with water passing holes 54 which communicate the water passing cavity 6 with the water inlet 21 of the water filtering structure 2, and a plurality of the water passing holes 54 are evenly distributed along the circumference of the limiting piece 5. Specifically, based on the technical scheme that the limiting piece 5 is connected to the inner side of the outer cover 3 and embedded in the sink groove 33 of the outer cover 3, the water passing cavity 6 formed by the limiting piece 5 and the outer cover 3 surrounds the water passing seat 4, so that the raw water entering the filter core can be uniformly dispersed in the circumferential direction in the water passing cavity 6 and then diffused towards the water inlet 21 of the water filtering structure 2 through the water passing holes 54, thereby making use of as many parts of the water filtering structure 2 as possible for filtering, avoiding that the raw water is filtered only in a certain part of the water filtering structure 2, and helping to improve the filtering efficiency. Moreover, by arranging the water passing cavity 6 to surround the water passing seat 4, it can be ensured that the raw water inlet channel 41 and the water passing cavity 6 are in communication no matter any angle relative rotation occurs between the outer cover 3 and the water passing seat 4.

[0067] As a preferred embodiment of the present application, as shown in Figure 8 As shown, the raw water inlet 441 is provided with a first check valve 71, and the first check valve 71 is limited by a first stop piece 81 connected with the water passing seat 4. As another preferred embodiment of the present application, as shown in Figure 7 As shown, the pure water discharge port 442 is provided with a second check valve 72, and the second check valve 72 is limited by a second stop piece 82 connected with the water passing seat 4. As still another preferred embodiment of the present application, as shown in Figure 7 As shown, the waste water discharge port 443 is provided with a third check valve 73, and the third check valve 73 is limited by a third stop piece 83 connected with the water passing seat 4. Specifically, the first check valve 71, the second check valve 72 and the third check valve 73 can all be one-way valves with a housing, a valve core and a spring. The first check valve 71, the second check valve 72 and the third check valve 73 can be turned on when the filter core and the filter core seat are docked, and specifically, the valve core can be pushed to be turned on by a top rod provided on the filter core seat. When the filter core is removed from the filter core seat, the first check valve 71, the second check valve 72 and the third check valve 73 are automatically closed under the action of the spring, so as to prevent the raw water, waste water and pure water left in the filter core from leaking outwards. The first stop piece 81, the second stop piece 82 and the third stop piece 83 can be fixed on the water passing seat 4 by screw connection, welding, clamping or the like.

[0068] As a preferred embodiment of the present application, as shown in Figure 16As shown, the water purifier comprises a waterway plate 9, the waterway plate 9 is provided with a filter element seat 91, the filter element seat 91 is provided with a raw water inlet 92, a pure water outlet 93 and a waste water outlet 94, the water purifier further comprises the filter element as described above, the raw water inlet 441 is inserted with the raw water inlet 92 along a first direction, the pure water outlet 442 is inserted with the pure water outlet 93 along the first direction, the waste water outlet 443 is inserted with the waste water outlet 94 along the first direction, and the outer cover 3 is rotationally connected with the filter element seat 91. Specifically, the raw water inlet 92, the pure water outlet 93 and the waste water outlet 94 are coaxially arranged, and the first direction is the axial direction of the raw water inlet 92, the pure water outlet 93 and the waste water outlet 94. When the filter element is installed, the raw water inlet 441, the pure water outlet 442 and the waste water outlet 443 on the water passing seat 4 can be moved axially in advance to be respectively connected with the raw water inlet 92, the pure water outlet 93 and the waste water outlet 94 on the filter element seat 91, and then the filter element is rotated to rotate the outer cover 3 and the filter element seat 91 to be in place, and during the rotation, the water passing seat 4 does not rotate with the outer cover 3.

[0069] It should be noted that since the water purifier provided in the present application comprises the filter element in any one of the above embodiments, the beneficial effects of the filter element are also included in the water purifier provided in the present application, which will not be described here.

[0070] As a preferred embodiment, as shown in Figure 10 and Figure 16 , a protruding rotating buckle protrusion 36 can be arranged on the outer cover 3, and a rotating buckle groove 95 is arranged on the filter element seat 91, so that the rotating buckle protrusion 36 is rotationally buckled with the rotating buckle groove 95.

[0071] The parts not described in the present application can be realized by using or referring to the existing technology.

[0072] Each embodiment in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the differences from other embodiments.

[0073] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A filter cartridge comprising a filter bottle and a filter structure arranged in the filter bottle, one end of the filter bottle being provided with a bottle cap assembly, characterized in that, The bottle cap assembly comprises an outer cap, a water passing seat and a limiting piece, the outer cap is connected with the filter bottle, the water passing seat is provided with a raw water inlet, a pure water discharge port and a waste water discharge port, the outer cap is provided with a mounting hole penetrating through the inside and outside, the water passing seat is assembled in the mounting hole and can rotate relative to the outer cap, and the limiting piece is used for pressing and holding the water passing seat on the outer cap to limit the axial movement of the water passing seat along the mounting hole.

2. The filter cartridge according to claim 1, wherein the limiting piece is connected to the inner side of the outer cap, the outer wall of the water passing seat is provided with a protruding limiting rib, the inner wall of the mounting hole is provided with a stop rib, and the limiting piece abuts against the limiting rib and presses and holds the limiting rib on the stop rib.

3. The filter cartridge according to claim 2, wherein the limiting piece is sleeved on the water passing seat, the limiting piece is provided with a plurality of limiting convex points arranged in the circumferential direction, and the limiting piece abuts against the limiting rib through the limiting convex points.

4. The filter cartridge according to claim 3, wherein the inner side of the outer cap is provided with a sink groove surrounding the mounting hole, the limiting piece is embedded in the sink groove and abuts against the side wall of the sink groove in the radial direction.

5. The filter cartridge according to claim 4, wherein the bottom wall of the sink groove is provided with a screw column, the limiting piece is provided with a screw hole, and the screw column and the screw hole are connected through a screw; and / or, the sink groove is provided with a foolproof convex, and the limiting piece is provided with a foolproof groove matched with the foolproof convex.

6. The filter cartridge according to claim 1, wherein the water passing seat is provided with a raw water inlet channel, a pure water outlet channel and a waste water outlet channel, the raw water inlet channel communicates the raw water inlet with the water inlet of the water filtering structure, the pure water outlet channel communicates the pure water outlet of the water filtering structure with the pure water discharge port, and the waste water outlet channel communicates the waste water outlet of the water filtering structure with the waste water discharge port, the pure water outlet channel and the waste water outlet channel extend in the axial direction of the water passing seat, and the raw water inlet channel extends in a direction perpendicular to the axial direction of the water passing seat.

7. The filter cartridge according to claim 6, wherein the water passing seat comprises a bottom plate, an outer ring wall surrounding the bottom plate and an inner ring wall provided in the outer ring wall, the raw water inlet, the pure water discharge port and the waste water discharge port are all provided on the bottom plate, the pure water outlet channel is formed in the inside of the inner ring wall, and the waste water outlet channel is formed between the outer ring wall and the inner ring wall.

8. The filter cartridge according to claim 6, wherein the limiting piece and the inner side of the outer cap form a water passing cavity, the water passing cavity is arranged around the water passing seat, the raw water inlet channel communicates the water passing cavity, the limiting piece is provided with a water passing hole communicating the water passing cavity with the water inlet of the water filtering structure, and a plurality of water passing holes are uniformly distributed in the circumferential direction of the limiting piece.

9. The filter cartridge according to claim 1, wherein a first check valve is arranged in the raw water inlet, and the first check valve is limited by a first stop piece connected with the water passing seat. And / or, the pure water discharge port is provided with a second check valve, and the second check valve is limited by a second stopper connected with the water passing seat; And / or, the waste water discharge port is provided with a third check valve, and the third check valve is limited by a third stopper connected with the water passing seat.

10. A water purifier comprising a waterway plate, a filter core seat being arranged on the waterway plate, the filter core seat being provided with a raw water inlet, a pure water outlet and a waste water outlet, characterized in that, The water purifier further comprises the filter element according to any one of claims 1 to 9, the raw water inlet is inserted with the raw water outlet along a first direction, the pure water discharge port is inserted with the pure water outlet along the first direction, the waste water discharge port is inserted with the waste water outlet along the first direction, and the outer cover is rotationally connected with the filter element seat.

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