Filter assembly, filter element and water purification equipment

Abstract

The utility model relates to the technical field of filtering devices, in particular to a filtering assembly, a filter element and water purifying equipment, the water purifying equipment comprises the filter element, the filter element comprises the filtering assembly, the filtering assembly comprises a central pipe, a reverse osmosis membrane layer arranged outside the central pipe and a rear filter element arranged in the central pipe, a first water inlet end is formed on the peripheral side of the reverse osmosis membrane layer, and a second water inlet end is formed on the peripheral side of the rear filter element. A concentrated water output end is formed at the end part of the reverse osmosis membrane layer, a through hole communicated with a pipe cavity of the central pipe is formed in the pipe wall of the central pipe, a water outlet is formed in the end part of the central pipe, a first groove opposite to the reverse osmosis membrane layer is further formed in the outer wall of the central pipe, and the first groove is used for accommodating an adhesive; the rear filter element is arranged in the central pipe, so that the area of a filter material in the filter assembly is increased, the filter performance of the filter assembly is enhanced, the water quality is further improved, and the body health of people is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of filter device especially, relates to a filter assembly, filter core and water purification equipment. BACKGROUND

[0002] Traditional filter core, such as RO membrane filter core, ultrafiltration filter core etc. are provided with a center tube, and water filtered by the filter core flows out from the center tube. However, as the filtration volume of the filter core increases, the filter core will gradually accumulate a large amount of impurities, particulate matter, colloids, microorganisms and other pollutants, and the filter material inside the filter core will be abraded or aged due to fluid scouring, resulting in a decline in the filtration performance of the filter core. At this time, the quality of the pure water formed by filtering through the filter core will also decrease, and if the pure water directly flows out through the center tube for people to use, it will affect the drinking safety of people.

[0003] The utility model is proposed in view of the deficiencies of the prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model is proposed in view of the deficiencies of the prior art.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A filter assembly comprises a center tube, a reverse osmosis membrane layer arranged outside the center tube, and a post-filter core arranged inside the center tube. A first water inlet end is formed on the outer periphery side of the reverse osmosis membrane layer, a concentrated water outlet end is formed on the end of the reverse osmosis membrane layer, a through hole is arranged on the tube wall of the center tube and communicates with the lumen of the center tube, a water outlet is arranged on the end of the center tube, and a first groove is arranged on the outer wall of the center tube and opposite to the reverse osmosis membrane layer. The first groove is used for accommodating an adhesive.

[0007] The filter assembly described above comprises a post-filter core, a connecting piece and a fixed end cover arranged at the two ends of the post-filter core respectively, the connecting piece is used for mounting the post-filter core in the center tube, the water outlet is arranged in the connecting piece, the connecting piece and the fixed end cover are respectively provided with a second groove and a third groove facing the post-filter core, and the second groove and the third groove are used for accommodating an adhesive.

[0008] The connecting piece comprises a top cylinder, a limiting part and a bottom cylinder arranged in sequence, the bottom of the bottom cylinder is provided with a first connecting groove capable of accommodating the rear filter element, the top wall of the first connecting groove is provided with the second groove, the limiting part extends outward along the radial direction of the connecting piece, the bottom cylinder is clamped into the center tube, and the limiting part abuts against the center tube.

[0009] The first connecting groove is further provided with a first positioning wall connected with the bottom cylinder, and the first positioning wall extends away from the limiting part along the axial direction of the connecting piece.

[0010] The fixing end cover is provided with a second connecting groove capable of accommodating the rear filter element, the bottom wall of the second connecting groove is provided with the third groove, the side wall of the second connecting groove is further provided with a second positioning wall connected with the fixing end cover, and the second positioning wall extends along the axial direction of the connecting end cover.

[0011] The top cylinder extends away from the bottom cylinder along the axial direction of the connecting piece, the outer circumferential sides of the top cylinder and the bottom cylinder are provided with mounting grooves for mounting sealing rings.

[0012] The filter assembly further comprises an upper end cover and a lower end cover arranged at two ends of the reverse osmosis membrane layer respectively, the upper end cover is arranged close to the water outlet, a flow guide cavity is arranged between the upper end cover and the concentrated water outlet, the inner side of the upper end cover is provided with a positioning part extending into the flow guide cavity and an inclined wall located on one side of the positioning part, the positioning part abuts against the concentrated water outlet, the inclined wall is used for guiding the waste water to flow away in a direction away from the concentrated water outlet, and the side wall of the upper end cover abuts against the first water inlet end of the reverse osmosis membrane layer.

[0013] The first grooves extend along the circumferential direction of the center tube, the first grooves are provided in a plurality of numbers, and the first grooves are arranged at intervals along the axial direction of the center tube.

[0014] In another aspect, the utility model also provides a filter element, comprising the filter assembly.

[0015] In another aspect, the utility model also provides a water purification equipment, comprising the filter element.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. By setting the post-filtering core in the center tube, the filter material area in the filtering assembly is increased, which is beneficial to enhance the filtering performance of the filtering assembly, further improve the water quality and protect the health of people;

[0018] 2. During assembly, the adhesive is poured into the first groove to fix and bond the reverse osmosis membrane layer on the outside of the center tube, so as to improve the connection stability between the reverse osmosis membrane layer and the center tube, make the inner side of the reverse osmosis membrane layer and the through hole of the outer peripheral side of the center tube tightly fit, and be beneficial to improve the flow speed of water flow, thereby improving the filtering efficiency and the bearing capacity of the filter core. Meanwhile, the adhesive overflows the first groove and is bonded with the reverse osmosis membrane layer, which is beneficial to improve the sealing property between the two ends of the reverse osmosis membrane layer and the center tube, avoid water flowing out from the assembly gap between the reverse osmosis membrane layer and the center tube, and avoid the mixing of water in and out of the reverse osmosis membrane layer, thereby improving the filtering efficiency of the filter core;

[0019] 3. The adhesive is used to seal and connect the reverse osmosis membrane layer and the center tube, without the need of using an additional sealing ring, so as to simplify the structure of the filtering assembly and reduce the production cost of the filtering assembly.

[0020] The utility model will be further described in connection with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the perspective view of the filter core of the utility model;

[0022] Figure 2 It is the A-A sectional view in Figure 1 It is the water path schematic view in

[0023] Figure 3 It is the water path schematic view in Figure 2 It is the water path schematic view in

[0024] Figure 4 It is the perspective view of the center tube of the filtering assembly of the utility model;

[0025] Figure 5 It is the exploded view of the center tube, connecting piece and fixed end cover of the filtering assembly of the utility model; Figure 1

[0026] Figure 6 It is the exploded view of the center tube, connecting piece and fixed end cover of the filtering assembly of the utility model; Figure 2

[0027] Figure 7 It is the perspective view of the connecting piece of the filtering assembly of the utility model under the bottom view. DETAILED DESCRIPTION

[0028] ​​The embodiments of the present application will be described in detail below with reference to the drawings. The described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] It should be noted that all directional indications, such as upper, lower, left, right, front, back, and the like, used in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0030] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0031] Embodiment 1:

[0032] As Figure 1The utility model provides a filter assembly 1, including the central pipe 11, be equipped with the reverse osmosis membrane layer 12 of central pipe 11 outside, be equipped with the post filter core 213 in central pipe 11, the first water inlet end 121 is formed to the outer circumferential side of reverse osmosis membrane layer 12, the end of reverse osmosis membrane layer 12 forms concentrated water output end 122, the pipe wall of central pipe 11 is equipped with the through -hole 111 with its lumen communication, the end of central pipe 11 is equipped with water outlet 112, the outer wall of central pipe 11 still is equipped with the first recess 113 with opposite reverse osmosis membrane layer 12, the first recess 113 is separated in the lumen of central pipe 11 by the pipe wall of central pipe 11, and the first recess 113 is used to accommodate adhesive, in actual filtration process, raw water enters into reverse osmosis membrane layer 12 from the first water inlet end 121, and the clean water or pure water that forms is filtered through reverse osmosis membrane layer 12 is output through the inside of reverse osmosis membrane layer 12, and is flowed to the lumen of central pipe 11 through the through -hole 111 of central pipe 11, then is further filtered through post filter core 213 and is guided to the outside through water outlet 112, to supply people to use, through setting up post filter core 213 in central pipe 11, increase the filter material area in filter assembly 1, is favorable to the enhancement filter assembly 1's filtration performance, further promotes water quality, guarantees people's health, on the other hand, when assembling, by pouring adhesive into the first recess 113, make reverse osmosis membrane layer 12 fixedly bonded in the outside of central pipe 11, to promote the connecting stability between reverse osmosis membrane layer 12 and central pipe 11, make the through -hole 111 of the outer circumferential side of reverse osmosis membrane layer 12 inside and central pipe 11 closely fit, is favorable to the improvement water flow's flow speed, to improve the filtration efficiency, and improve the bearing capacity of filter core 2, simultaneously, adhesive overflow first recess 113 and is bonded with reverse osmosis membrane layer 12, is favorable to the promotion the sealing property between the both ends of reverse osmosis membrane layer 12 and central pipe 11, avoid water from the assembly gap between reverse osmosis membrane layer 12 and central pipe 11 to flow out, and avoid the waterway of reverse osmosis membrane layer 12 inside and outside to mix, to improve the filtration efficiency of filter core 2, furthermore, utilize adhesive to make the sealing connection between reverse osmosis membrane layer 12 and central pipe 11, need not to adopt additional sealing ring, to be favorable to the simplification the structure of filter assembly 1, reduce the production cost of filter assembly 1, secondly, reverse osmosis membrane layer 12 is firmly adhered to the outside of central pipe 11 through adhesive, is favorable to prevent reverse osmosis membrane layer 12 from falling off or loosening, to prolong the service life of filter core 2, optionally, the adhesive includes epoxy resin glue, polyurethane glue, two components polyurethane adhesive etc., the adhesive durability is strong, and the bonding strength is high, to be favorable to the quick installation of post filter core 213 and the promotion connection stability.Optionally, the first groove 113 is disposed on the upper and / or lower side of the through hole 111, so that the first groove 113 is separated from the through hole 111, preventing the through hole 111 from being filled with adhesive and blocking the flow of water into the central tube 11. Optionally, the post-filter 213 can be a carbon rod, activated carbon filter 2, etc., to facilitate the removal of impurities such as residual chlorine, organic matter, and odors from the water, improve the taste of pure water, and enhance water quality.

[0033] Example 2:

[0034] This embodiment 2, based on the above embodiment 1, has the following implementation method, such as... Figure 4 As shown, the first groove 113 extends circumferentially along the central tube 11, that is, the first groove 113 is set as an annular groove, so as to increase the bonding area of ​​the reverse osmosis membrane layer 12; more preferably, there are a plurality of first grooves 113, and each first groove 113 is spaced apart along the axial direction of the central tube 11, so as to increase the bonding area of ​​the reverse osmosis membrane layer 12 and further enhance the sealing connection between the reverse osmosis membrane layer 12 and the central tube 11.

[0035] Example 3:

[0036] This embodiment 3, based on the above embodiments 1 and / or 2, has the following implementation method, such as... Figure 3 As shown, a second water inlet 131 is formed on the outer periphery of the post-filter element 213. A hollow flow channel 132 communicating with the second water inlet 131 is provided inside the post-filter element 213. The hollow flow channel 132 is axially disposed in the post-filter element 213 and is connected to the water outlet 112. The second water inlet 131 is connected to the cavity of the central tube 11. During filtration, the water in the cavity of the central tube 11 enters the post-filter element 213 through the second water inlet 131 for further filtration. The final pure water flows out to the outside through the hollow flow channel 132 and the water outlet 112.

[0037] Optionally, the filter assembly 1 further includes a connector 14 and a fixed end cap 15 respectively disposed at both ends of the post-filter element 213. The connector 14 is used to install the post-filter element 213 in the central tube 11. The outlet 112 is disposed within the connector 14. Preferably, the outlet 112 is disposed through the connector 14 along its axial direction. The connector 14 and the fixed end cap 15 are respectively provided with a second groove 141 and a third groove 151 facing the post-filter element 213. Both the second groove 141 and the third groove 151 are used to accommodate adhesive, such as... Figure 5 and Figure 6As shown, the connecting piece 14 is mounted at the top of the rear filter element 213, and the fixed end cover 15 is mounted at the bottom of the rear filter element 213. During assembly, adhesive is poured into the second groove 141 and the third groove 151 to fix the connecting piece 14 and the fixed end cover 15 at the two ends of the rear filter element 213. The connecting piece 14 and the fixed end cover 15 are tightly connected with the rear filter element 213 by pouring adhesive, which is beneficial to improve the structural stability of the rear filter element 213. Meanwhile, the adhesive in the second groove 141 and the third groove 151 overflows and is tightly bonded with the rear filter element 213, which is beneficial to block the assembly gap between the rear filter element 213 and the connecting piece 14 and the fixed end cover 15, thereby increasing the sealing performance of the connecting position of the two ends of the rear filter element 213, avoiding the mixing of the water channels inside and outside the rear filter element 213, and improving the quality of the final output of pure water. In addition, the two ends of the rear filter element 213 are sealed and connected with the connecting piece 14 and the fixed end cover 15 by using adhesive, without the need for additional sealing rings, which is beneficial to simplify the structure of the rear filter element 213 and reduce the production cost of the rear filter element 213. Optionally, the adhesive in the present embodiment is the same as the adhesive in Embodiment 1.

[0038] Embodiment 4

[0039] The present embodiment 4 is based on the above-mentioned embodiment 3 and has the following implementation manner, such as Figure 5As shown in Figure 7, the connector 14 includes an upper cylindrical body 142, a limiting part 143, and a lower cylindrical body 144 arranged sequentially. The bottom of the lower cylindrical body 144 is provided with a first connecting groove 145 capable of accommodating the post-filter element 213. A second groove 141 is located on the top wall of the first connecting groove 145. The limiting part 143 extends radially outward along the connector 14. The lower cylindrical body 144 is snapped into the central tube 11, and the limiting part 143 abuts against the central tube 11. Optionally, the connector 14 is a hollow cylindrical body. The hollow part of the connector 14 forms the outlet 112 communicating with the hollow flow channel 132. The outer diameter of the lower cylindrical body 144 is adapted to the inner diameter of the central tube 11. The side of the first connecting groove 145... The outer diameter of the wall 164 is the same as the outer diameter of the lower cylinder 144. During assembly, the post-filter element 213 is installed in the first connecting groove 145 with adhesive so that the post-filter element 213 is installed in the lower part of the connector 14. The post-filter element 213 and the connector 14 are directly inserted into the central tube 11, and the limiting part 143 abuts against the port of the central tube 11 to position the connector 14 and the post-filter element 213 relative to the central tube 11. The connector 14 has a simple structure and is easy to disassemble and replace the post-filter element 213. At the same time, the outer periphery of the post-filter element 213 and the inner wall 164 of the central tube 11 form a water passage gap to ensure normal water output from the outlet 112.

[0040] Optionally, the limiting part 143 is provided with a first reinforcing rib 148 connected to the upper cylinder 142 and a second reinforcing rib 149 connected to the lower cylinder 144 on both sides. Several first reinforcing ribs 148 and second reinforcing ribs 149 are provided. Each first reinforcing rib 148 is evenly spaced along the circumference of the upper cylinder 142, and each second reinforcing rib 149 is evenly spaced along the circumference of the lower cylinder 144. This enhances the structural strength of the connector 14, thereby improving its durability. It should be noted that, to further improve the connection stability between the connector 14 and the central tube 11, such as... Figure 5 As shown, both the upper cylindrical body 142 and the lower cylindrical body 144 are provided with relief annular grooves 140. Each of the first reinforcing ribs 148 is provided in the relief annular groove 140 of the upper cylindrical body 142, and each of the second reinforcing ribs 149 is provided in the relief annular groove 140 of the lower cylindrical body 144, so that the overall outer diameter of the lower cylindrical body 144 is adapted to the inner diameter of the central tube 11, and the second reinforcing ribs 149 can be placed in the central tube 11.

[0041] Example 5:

[0042] This embodiment 5 is based on the above embodiment 4, and has the following implementation manners, as shown in the figures Figure 5 As shown in the figure, the first connecting groove 145 is further provided with a first positioning wall 146 connected with the lower cylindrical body 144, the first positioning wall 146 extends along the axial direction of the connecting piece 14 away from the limiting part 143; optionally, the first positioning wall 146 extends downward from the outer edge of the lower cylindrical body 144, the first positioning wall 146 encloses the first connecting groove 145, and the mounting position of the rear filter element 213 is positioned by the first positioning wall 146, so as to facilitate the quick installation of the rear filter element 213 and improve the connection stability of the rear filter element 213, thereby improving the filtering effect of the filter assembly 1.

[0043] Optionally, the first positioning wall 146 can be a continuous wall body.

[0044] Optionally, the first positioning wall 146 can be provided in plurality, and each first positioning wall 146 is arranged equidistantly along the circumferential direction of the lower cylindrical body 144.

[0045] Embodiment 6:

[0046] This embodiment 6 is based on the above embodiment 4, and has the following implementation manners, as shown in the figures Figure 5 As shown in the figure, the outer circumferential side of the lower cylindrical body 144 is provided with a mounting groove 147, the mounting groove 147 is used for mounting a sealing ring, and during assembly, the sealing ring is arranged in the mounting groove 147 and abuts against the inner wall of the center pipe 11, so as to improve the connection sealing property between the connecting piece 14 and the center pipe 11, avoid water leakage, and thereby improve the water purification effect of the filter assembly 1.

[0047] Optionally, this embodiment 6 can form a new embodiment in combination with the above embodiment 5.

[0048] Embodiment 7:

[0049] This embodiment 7 is based on the above embodiment 4, and has the following implementation manners, as shown in the figures Figure 3 and Figure 5As shown, the upper side cylinder 142 extends along the axial direction of the connecting piece 14 away from the lower side cylinder 144, and the outer circumferential side of the upper side cylinder 142 is also provided with a mounting groove 147 for mounting a sealing ring; in this embodiment, the connecting piece 14 is connected with the filter element mounting seat 21 through the upper side cylinder 142 to improve the connection stability of the connecting piece 14, and by providing the mounting groove 147 on the outer wall of the upper side cylinder 142, a sealing ring is arranged in the mounting groove 147 during assembly, so as to facilitate the sealing of the assembly gap between the upper side cylinder 142 and the filter element mounting seat 21, prevent water leakage, and thus avoid the internal waterway of the filter assembly 1 being messy and affecting the quality of pure water.

[0050] Optionally, the embodiment 7 can be combined with the above-mentioned embodiment 5 and / or embodiment 6 to form a new embodiment.

[0051] Embodiment 8:

[0052] This embodiment 8 is based on the above-mentioned embodiment 3, and has the following implementation manners, as shown in Figure 5 and Figure 6 As shown, the fixed end cover 15 is provided with a second connecting groove 152 capable of accommodating the rear filter element 213, the bottom wall of the second connecting groove 152 is provided with the third groove 151, the third groove 151 is preferably an annular groove and is arranged on the top wall of the fixed end cover 15, and the circumferential side of the second connecting groove 152 is further provided with a second positioning wall 153 connected with the fixed end cover 15, the second positioning wall 153 extends along the axial direction of the connecting end cover, and optionally, the second positioning wall 153 extends upward from the outer edge of the fixed end cover 15, the second positioning wall 153 and the fixed end cover 15 enclose the second connecting groove 152, the mounting position of the rear filter element 213 is positioned by the second positioning wall 153, so as to facilitate the quick installation of the rear filter element 213 and improve the connection stability of the rear filter element 213, thereby improving the filtering effect of the filter assembly 1.

[0053] Optionally, the second positioning wall 153 can be a continuous wall body.

[0054] Optionally, the second positioning wall 153 can be provided in a plurality of forms, and each second positioning wall 153 is arranged equidistantly along the circumferential direction of the fixed end cover 15.

[0055] Optionally, the embodiment 8 can be combined with any one or several of the above-mentioned embodiments 4-7 to form a new embodiment.

[0056] Embodiment 9:

[0057] This embodiment 9 is based on the above-mentioned embodiment 1 and / or embodiment 2, and has the following implementation manners, as shown inFigure 2 and Figure 3 As shown in the figure, the filter assembly 1 further comprises an upper end cover 16 and a lower end cover 17 arranged at both ends of the reverse osmosis membrane layer 12, the upper end cover 16 is arranged close to the water outlet 112, a flow guide cavity 161 is arranged between the upper end cover 16 and the concentrated water outlet 122, the upper end cover 16 is provided with a positioning portion 162 for positioning the reverse osmosis membrane layer 12, an inclined wall 163 located on one side of the positioning portion 162, the positioning portion 162 extends towards the flow guide cavity 161, the inclined wall 163 is used to guide the waste water to flow away in a direction away from the concentrated water outlet 122, and the side wall 164 of the upper end cover 16 clamps the reverse osmosis membrane layer 12; Specifically, the upper end cover 16 is arranged at the top of the reverse osmosis membrane layer 12, the lower end cover 17 is arranged at the bottom of the reverse osmosis membrane layer 12, the upper end cover 16 is sequentially provided with a connector 165, the inclined wall 163 and the side wall 164 from top to bottom, the connector 165 is provided with a concentrated water outlet 1651 in communication with the flow guide cavity 161 and the concentrated water outlet 122, the inclined wall 163 is preferably provided with a funnel-shaped wall body, the inner diameter of the inclined wall 163 gradually decreases from the concentrated water outlet 122 to the concentrated water outlet 1651, an installation cavity for fixing the reverse osmosis membrane layer 12 is formed by the inclined wall 163 and the side wall 164, and the reverse osmosis membrane layer 12 is clamped by the side wall 164, the positioning portion 162 is arranged between the inclined wall 163 and the side wall 164, the positioning portion 162 abuts against the concentrated water outlet 122 of the reverse osmosis membrane layer 12, and the inclined wall 163 is separated from the concentrated water outlet 122 by the positioning portion 162 to form the flow guide cavity 161; In the actual water purification process, the concentrated water is output through the concentrated water outlet 122, flows to the concentrated water outlet 1651 through the flow guide cavity 161 and is discharged to the outside, and the flow speed of the concentrated water is accelerated by the inclined wall 163 to improve the discharge efficiency of the concentrated water.

[0058] Optionally, when the filter assembly 1 is installed downwardly, i.e. the inclined wall 163 is placed downwardly, the concentrated water flows out along the inclined wall 163 to the concentrated water outlet 1651 under the action of gravity, and the discharge effect of the concentrated water is better.

[0059] Optionally, the present embodiment 9 can be combined with any one or several of the above-mentioned embodiments 3-8 to form a new embodiment.

[0060] Embodiment 10:

[0061] The present embodiment 10 is based on the above-mentioned embodiment 9 and has the following implementation manners, such as Figure 2As shown, the positioning portion 162 is provided with a plurality of positioning portions 162, each of which is arranged equidistantly along the circumference of the upper end cover 16, and the length of the positioning portion 162 is less than the length of the inclined wall 163, so as to avoid that the positioning portion 162 increases the resistance of the concentrated water output in the flow guide cavity 161.

[0062] Optionally, the embodiment 10 can be combined with any one or several of the above-mentioned embodiments 3-8 to form a new embodiment.

[0063] Embodiment 11:

[0064] On the other hand, as Figure 1 As shown in FIG. 3, the utility model further provides a filter element 2, which comprises a filter element mounting seat 21, a filter bottle 22, and the filter assembly 1 as described in any one of the above-mentioned embodiments 1-10, the filter element mounting seat 21 is detachably connected with the filter bottle 22, the filter assembly 1 is installed in the filter bottle 22, the filter element mounting seat 21 is provided with a first connecting barrel 211 connected with the upper end cover 16, a second connecting barrel 212 connected with the connecting piece 14, and a water inlet 213, a concentrated water outlet 214 and a pure water outlet 215, the outer side of the first connecting barrel 211 is provided with a water inlet channel 216 in communication with the water inlet 213 and the inner cavity of the filter bottle 22, the first connecting barrel 211 and the second connecting barrel 212 are provided with a concentrated water channel 217 in communication with the flow guide cavity 161 and the concentrated water outlet 214, and the inner side of the second connecting barrel 212 is provided with a pure water channel 218 in communication with the pure water outlet 215 and the water outlet 112. Figure 3 As shown in FIG. 3, the filter element 2 inputs raw water to the inner cavity of the filter bottle 22 through the water inlet 213 and the water inlet channel 216, the raw water between the filter bottle 22 and the reverse osmosis membrane layer 12 enters the reverse osmosis membrane layer 12 through the first water inlet end 121 to be filtered, the pure water formed after being filtered by the reverse osmosis membrane layer 12 is output from the inner side of the reverse osmosis membrane layer 12 and flows to the lumen of the center tube 11 through the through hole 111 of the center tube 11, the pure water in the lumen of the center tube 11 enters the post filter element 213 through the second water inlet end 131 to be further filtered, the pure water formed after being filtered by the post filter element 213 is output from the inner side of the post filter element 213 to the water outlet 112 and is guided to the outside through the pure water channel 218 and the pure water outlet 215 for people to use, and on the other hand, the concentrated water formed after being filtered by the reverse osmosis membrane layer 12 enters the flow guide cavity 161 through the concentrated water outlet end 122 and is discharged to the outside through the concentrated water channel 217 and the concentrated water outlet 214.

[0065] Further, the upper side cylinder 142 in the connecting piece 14 is correspondingly connected with the second connecting cylinder 212, and the first reinforcing rib 148 in the upper side cylinder 142 is also arranged in the second connecting cylinder 212, the outer diameter size of the whole upper side cylinder 142 is matched with the inner diameter size of the second connecting cylinder 212, so as to increase the connecting stability and sealing performance between the connecting piece 14 and the filter element mounting seat 21, when assembled, the second connecting cylinder 212 abuts against the limiting part 143, and a sealing ring is arranged in the mounting groove 147 of the upper side cylinder 142, so as to prevent water leakage, and improve the discharging efficiency and water quality of pure water.

[0066] Embodiment 12:

[0067] In another aspect, the utility model also provides a kind of water purification equipment, including the filter element 2 as described in embodiment 11, or including the filter assembly 1 as described in any one of above embodiment 1-embodiment 10.

[0068] The above is only to further illustrate the technical content of the utility model with examples, so that the reader is easier to understand, but not represent the embodiment of the utility model is limited to this, any technical extension or re-creation made according to the utility model, is protected by the utility model.The protection scope of the utility model is subject to the claims.

Claims

1. A filter assembly characterized by, The filter assembly (1) comprises a center pipe (11), a reverse osmosis membrane layer (12) arranged outside the center pipe (11), and a post-filter (13) arranged in the center pipe (11). The outer periphery of the reverse osmosis membrane layer (12) is provided with a first water inlet end (121), and the end of the reverse osmosis membrane layer (12) is provided with a concentrated water outlet end (122). The pipe wall of the center pipe (11) is provided with a through hole (111) in communication with the lumen of the center pipe (11). The end of the center pipe (11) is provided with a water outlet (112). The outer wall of the center pipe (11) is further provided with a first groove (113) opposite to the reverse osmosis membrane layer (12), and the first groove (113) is used for accommodating an adhesive.

2. A filter assembly as claimed in claim 1, wherein, The outer periphery of the post-filter (13) is provided with a second water inlet end (131), and the post-filter (13) is provided with a hollow flow channel (132) in communication with the second water inlet end (131). The hollow flow channel (132) is in communication with the water outlet (112). The filter assembly (1) further comprises a connecting piece (14) and a fixed end cover (15) arranged at the two ends of the post-filter (13) respectively. The connecting piece (14) is used for mounting the post-filter (13) in the center pipe (11). The water outlet (112) is arranged in the connecting piece (14). The connecting piece (14) and the fixed end cover (15) are respectively provided with a second groove (141) and a third groove (151) facing the post-filter (13), and the second groove (141) and the third groove (151) are used for accommodating an adhesive.

3. A filter assembly as claimed in claim 2, wherein The connecting piece (14) comprises an upper side cylinder (142), a limiting part (143), and a lower side cylinder (144) arranged in sequence. The bottom of the lower side cylinder (144) is provided with a first connecting groove (145) capable of accommodating the post-filter (13). The top wall of the first connecting groove (145) is provided with the second groove (141). The limiting part (143) extends outward along the radial direction of the connecting piece (14). The lower side cylinder (144) is clamped into the center pipe (11), and the limiting part (143) abuts against the center pipe (11).

4. A filter assembly as claimed in claim 3, wherein The first connecting groove (145) is further provided with a first positioning wall (146) connected with the lower side cylinder (144). The first positioning wall (146) extends away from the limiting part (143) along the axial direction of the connecting piece (14).

5. A filter assembly as claimed in claim 2, wherein, The fixed end cover (15) is provided with a second connecting groove (152) capable of accommodating the post-filter (13). The bottom wall of the second connecting groove (152) is provided with the third groove (151). The periphery of the second connecting groove (152) is further provided with a second positioning wall (153) connected with the fixed end cover (15). The second positioning wall (153) extends along the axial direction of the connecting end cover.

6. A filter assembly as claimed in claim 3, wherein, The upper cylinder (142) extends along the axial direction of the connecting piece (14) away from the lower cylinder (144), and the outer periphery of the upper cylinder (142) and the lower cylinder (144) is provided with a mounting groove (147) for mounting a sealing ring.

7. A filter assembly as claimed in claim 1, wherein, Further comprising an upper end cover (16) and a lower end cover (17) respectively arranged at two ends of the reverse osmosis membrane layer (12), the upper end cover (16) is arranged close to the water outlet (112), a flow guide cavity (161) is arranged between the upper end cover (16) and the concentrated water outlet (122), the inner side of the upper end cover (16) is provided with a positioning portion (162) extending into the flow guide cavity (161) and an inclined wall (163) located on one side of the positioning portion (162), the positioning portion (162) abuts against the concentrated water outlet (122), and the inclined wall (163) is used for guiding the waste water to flow away in a direction away from the concentrated water outlet (122), and the side wall (164) of the upper end cover (16) abuts against the first water inlet end (121) of the reverse osmosis membrane layer (12).

8. A filter assembly as claimed in claim 1, wherein, The first grooves (113) extend along the circumferential direction of the center pipe (11), a plurality of first grooves (113) are arranged, and each first groove (113) is arranged in the axial direction of the center pipe (11).

9. A filter cartridge, characterized by The filter assembly (1) according to any one of claims 1 to 8.

10. A water purification apparatus characterized by comprising: The filter cartridge (2) according to claim 9.

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