CN216038893U - Lower end cover of front filter element of composite filter element and composite filter element - Google Patents

Abstract

The utility model discloses a lower end cover of a front filter element of a composite filter element and the composite filter element, wherein the lower end cover of the front filter element of the composite filter element comprises: the lower cover body is internally provided with a lower pure water pipe through hole, and the inner peripheral surface of the lower pure water pipe through hole is provided with a lower positioning groove; the lower positioning piece is arranged in the lower positioning groove; the lower sealing ring is matched in the lower positioning groove and axially clamped between the lower positioning piece and the lower positioning groove, and the diameter of the lower pure water pipe through hole is 4-8 mm. The lower end cover of the front filter element of the composite filter element provided by the embodiment of the utility model has the advantages of prolonging the service life of the front filter element and the like.

Description

Lower end cover of front filter element of composite filter element and composite filter element

Technical Field

The utility model relates to the technical field of electric appliance manufacturing, in particular to a lower end cover of a front filter element of a composite filter element and the composite filter element with the lower end cover of the front filter element of the composite filter element.

Background

In the composite filter element in the related technology, the front filter element, the rear filter element and the main filter element are combined in one composite filter element, but the service life of the front filter element is shorter than that of the main filter element and the rear filter element, and the front filter element needs to be replaced periodically based on the service life of the front filter element during replacement, so that the composite filter element is replaced frequently, not only is inconvenient, but also the use cost of a user is increased.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the lower end cover of the front filter element of the composite filter element, and the lower end cover of the front filter element of the composite filter element has the advantages of prolonging the service life of the front filter element and the like.

The utility model also provides a composite filter element with the lower end cover of the front filter element of the composite filter element.

To achieve the above object, an embodiment according to a first aspect of the present invention provides a lower end cap of a front filter element of a composite filter element, the lower end cap of the front filter element of the composite filter element including: the lower cover body is internally provided with a lower pure water pipe through hole, and the inner peripheral surface of the lower pure water pipe through hole is provided with a lower positioning groove; the lower positioning piece is arranged in the lower positioning groove; the lower sealing ring is matched in the lower positioning groove and axially clamped between the lower positioning piece and the lower positioning groove, and the diameter of the lower pure water pipe through hole is 4-8 mm.

The lower end cover of the front filter element of the composite filter element provided by the embodiment of the utility model has the advantages of prolonging the service life of the front filter element and the like.

In addition, the lower end cover of the front filter element of the composite filter element according to the embodiment of the utility model can also have the following additional technical characteristics:

according to one embodiment of the utility model, the diameter of the lower plain water pipe through hole is 5-7 mm.

According to one embodiment of the utility model, the lower positioning groove is communicated with the upper end surface of the lower end cover, and the lower sealing ring is clamped between the inner bottom surface of the lower positioning groove and the lower end surface of the lower positioning piece.

According to one embodiment of the utility model, an axial positioning groove is formed in the inner circumferential surface of the lower positioning groove, and an axial positioning buckle is arranged on the outer circumferential surface of the lower positioning piece and is clamped in the axial positioning groove.

According to one embodiment of the utility model, the inner circumferential surface of the lower positioning groove is provided with a circumferential positioning groove, and the outer circumferential surface of the lower positioning piece is provided with a circumferential positioning boss, wherein the circumferential positioning boss is matched in the circumferential positioning groove.

According to one embodiment of the present invention, the circumferential positioning groove communicates with an upper end surface of the lower cover body.

According to one embodiment of the utility model, the circumferential positioning boss protrudes out of the upper end surface of the lower positioning piece.

According to one embodiment of the utility model, the lower seal ring is a plurality of lower seal rings and is arranged along the axial direction.

According to one embodiment of the utility model, the outer circumferential surface of the lower cover body is sleeved with a fourth sealing ring.

An embodiment according to the second aspect of the utility model proposes a composite filter cartridge comprising a lower end cap of a front filter cartridge of a composite filter cartridge according to an embodiment of the first aspect of the utility model.

According to the composite filter element disclosed by the embodiment of the utility model, the lower end cover of the front filter element of the composite filter element disclosed by the embodiment of the first aspect of the utility model is utilized, so that the composite filter element has the advantages of long service life and the like.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a front filter element of a composite filter element according to an embodiment of the utility model.

Fig. 2 is a cross-sectional view of a front cartridge of a composite cartridge according to an embodiment of the utility model.

Fig. 3 is a cross-sectional view of a front cartridge of a composite cartridge according to an embodiment of the utility model.

Fig. 4 is an exploded view of a front cartridge of a composite cartridge according to an embodiment of the present invention.

Fig. 5 is a partial cross-sectional view of a front cartridge of a composite cartridge according to an embodiment of the utility model.

Fig. 6 is a partial schematic view of a front filter element of a composite filter element according to an embodiment of the utility model.

Fig. 7 is a partial schematic view of a front filter element of a composite filter element according to an embodiment of the utility model.

Fig. 8 is a partial schematic view of a front filter element of a composite filter element according to an embodiment of the utility model.

Fig. 9 is a partial schematic view of a front filter element of a composite filter element according to an embodiment of the utility model.

Fig. 10 is a partial cross-sectional view of a front cartridge of a composite cartridge according to an embodiment of the utility model.

Fig. 11 is a partial cross-sectional view of a front cartridge of a composite cartridge according to an embodiment of the utility model.

Fig. 12 is a partial schematic view of a front filter element of a composite filter element according to an embodiment of the utility model.

Fig. 13 is a partial cross-sectional view of a front cartridge of a composite cartridge according to an embodiment of the utility model.

Fig. 14 is a schematic structural view of a composite filter element according to an embodiment of the utility model.

Fig. 15 is a cross-sectional view of a composite filter element according to an embodiment of the utility model.

Fig. 16 is a cross-sectional view of a composite filter element according to an embodiment of the utility model.

Fig. 17 is an exploded view of a composite filter element according to an embodiment of the present invention.

Reference numerals: the composite filter element 1, the front filter element 10 of the composite filter element, the front filter element 100, the inner filter element 110, the outer filter element 120, the plain water pipe 200, the upper end cover 300, the upper cover body 310, the rotary positioning rib 311, the notch 312, the upper mounting hole 313, the upper positioning member 320, the first rotary buckle 321, the second rotary buckle 322, the positioning ring platform 323, the adapter 330, the upper plain water pipe via hole 331, the upper positioning groove 332, the mounting groove 333, the rotary clamping groove 334, the communication groove 335, the upper sealing ring 340, the second sealing ring 350, the third sealing ring 360, the lower end cover 400, the lower cover body 410, the lower plain water pipe via hole 411, the lower positioning groove 412, the axial positioning groove 413, the circumferential positioning groove 414, the lower positioning member 420, the axial positioning buckle 421, the circumferential positioning boss 422, the lower sealing ring 430, the fourth sealing ring 440, the waterway adapter cover 20, the handle 21, the cover 22, the adapter 23, the main filter adapter cover 30, the inner cylinder 40, the rear filter element 50, the outer filter element 120, the upper pure water pipe via hole 331, the upper end cover, the rotary positioning groove, the lower end cover, the rotary positioning groove cover, the rotary positioning structure, the rotary filter element, the rotary structure, and the rotary structure, A post-filter element end cover 51, a main filter material 60, a central tube 70 and an outer tube 80.

Detailed Description

The present application is based on the discovery and recognition by the inventors of the following facts and problems:

in the composite filter element in the related technology, the front filter element, the rear filter element and the main filter element are combined in one composite filter element, but the service life of the front filter element is shorter than that of the main filter element and the rear filter element, and the front filter element needs to be replaced periodically based on the service life of the front filter element during replacement, so that the composite filter element is replaced frequently, not only is inconvenient, but also the use cost of a user is increased.

Specifically, the composite filter element in the related art has a small fillable volume and a small dirt receiving area of the front filter element, which results in a short service life.

For example, taking a composite filter element with an RO membrane as a main filter element as an example, the service life of the RO membrane filter element exceeds two years, and if a PAC filter element is adopted as a front filter element, the service life is usually only one year. Thus resulting in the need to replace the composite filter element a year.

Therefore, through a great deal of research, the inventor of the present application has found that in the composite filter element in the related art, the plain water pipe of the front filter element needs to be provided with a ring groove and other structures on the outer peripheral surface to position the sealing ring in order to facilitate the installation of the sealing ring. In order to form the annular groove on the outer peripheral surface of the pipe wall, the pure water pipe needs to be formed by adopting a blow molding process, on one hand, the pure water pipe formed by the blow molding process has a large pipe diameter, the outer diameter can reach more than 10 millimeters, the fillable volume of the preposed filter material is influenced, the pollutant containing area is reduced, on the other hand, in order to form the annular groove and other structures, the pipe wall needs to ensure a certain thickness, the fillable volume of the preposed filter material is further influenced, and the pollutant containing area is reduced.

The inventor of the present application has further found that, since the plain water pipe is an extruded flat pipe having a flat outer peripheral surface, it is difficult to position the seal ring on the plain water pipe, and the seal ring may not be mounted in place or may be displaced after being mounted, thereby affecting the sealing performance.

Through further research, the applicant of the present application finds that if the positioning groove for positioning the seal ring is directly formed by the inner circumferential surfaces of the adapter and the lower end cover, the seal ring is difficult to mount.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A lower end cap 400 of a front cartridge of a composite cartridge according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The lower cap 400 includes a lower cap body 410 and a lower positioning member 420.

A lower pure water pipe through hole 411 is formed in the lower cover 410, a lower positioning groove 412 is formed in the inner circumferential surface of the lower pure water pipe through hole 411, the lower positioning member 420 is installed in the lower positioning groove 412, and the lower end of the pure water pipe 200 is fitted into the lower pure water pipe through hole 411. The lower sealing ring 430 is fitted in the lower positioning groove 412 and axially clamped between the lower positioning member 420 and the lower positioning groove 412, and the lower sealing ring 430 is sleeved outside the deionized water pipe 200. Specifically, during installation, the lower seal ring 430 may be first installed in the lower positioning groove 412, and then the lower positioning member 420 and the lower cover 410 are installed together, so that the lower seal ring 430 is clamped between the lower positioning member 420 and the lower positioning groove 412 of the lower cover 410, thereby positioning the lower seal ring 430. From this can set up lower end cover 400 into a plurality of split pieces, compare the technical scheme of constant head tank direct formation at lower end cover 400 inner peripheral surface, can be convenient for lower sealing washer 430's installation.

Therefore, the filter material can be adapted to a pure water pipe with a smooth outer peripheral wall formed by extrusion molding, the space occupied by the pure water pipe 200 can be reduced, the fillable volume of the front filter material 100 can be increased, and the service life of the front filter element 10 can be conveniently prolonged.

The diameter of the lower plain water pipe through hole 411 is 4-8 mm.

According to the front filter element 10 of the composite filter element provided by the embodiment of the utility model, the diameter of the lower plain water pipe through hole 411 is 4-8 mm, and the front filter element can be adapted to a plain water pipe with the outer diameter of 4-8 mm, so that compared with the front filter element in the related art, the space occupied by the plain water pipe 200 can be reduced, the fillable volume of the front filter element 100 can be increased, the dirt accommodating area of the front filter element 100 can be increased, and the service life of the front filter element 10 can be prolonged.

A front cartridge 10 of a composite cartridge according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 17, the front filter element 10 of the composite filter element according to the embodiment of the present invention includes a front filter material 100, a deionized water pipe 200, an upper end cap 300, and a lower end cap 400 (the up-down direction is shown by an arrow in the drawings and is for convenience of description only, and is not limited to the actual installation direction).

The deionized water pipe 200 has an outer diameter of 4 to 8 mm.

According to the pre-filter element 10 of the composite filter element provided by the embodiment of the utility model, the outer diameter of the plain water pipe 200 is 4-8 mm, so that compared with the pre-filter element in the related art, the occupied space of the plain water pipe 200 can be reduced, the fillable volume of the pre-filter element 100 can be increased, the dirt accommodating area of the pre-filter element 100 can be increased, and the service life of the pre-filter element 10 can be prolonged.

The raw water pipe 200 is provided in the pre-filter 100, and the raw water pipe 200 is an extrusion-molded flat pipe member having a smooth outer peripheral surface. The upper cap 300 is provided at the upper end of the pre-filter 100, and the upper end of the deionized water pipe 200 is fitted into the upper cap 300. The lower cap 400 is provided at the lower end of the pre-filter 100, and the lower end of the deionized water pipe 200 is fitted into the lower cap 400.

Specifically, the "plain water pipe 200 is an extrusion-molded outer peripheral surface flat pipe. "means that the outer peripheral surface of the deionized water pipe 200 is flat and has no structure for positioning the seal ring.

According to the pre-filter element 10 of the composite filter element of the embodiment of the utility model, the pure water pipe 200 is an extrusion-molded flat pipe with a smooth outer peripheral surface, compared with the pure water pipe which is blow-molded and provided with the sealing ring positioning structure on the outer peripheral surface in the related art, on one hand, the extrusion molding can facilitate the reduction of the pipe diameter and the pipe wall thickness of the pure water pipe 200, thereby reducing the space occupied by the plain water pipe 200, increasing the fillable volume of the pre-filter material 100, increasing the dirt-containing area of the pre-filter material 100, on the other hand, because the outer peripheral surface of the plain water pipe 200 is flat and does not have a structure for positioning the sealing ring, not only the space occupied by the positioning structures can be saved, but also the pipe wall thickness of the plain water pipe 200 can be conveniently reduced, thereby further being convenient for reduce the space that pure water pipe 200 occupy, improving leading filter media 100 can fill the volume, increase and receive dirty area to the life of extension leading filter core 10.

Therefore, the front filter element 10 of the composite filter element according to the embodiment of the utility model has the advantages of long service life and the like.

Specifically, the deionized water pipe 200 has an outer diameter of 5 to 7 mm. Here preferably 6 mm. Therefore, the outer diameter of the pure water pipe 200 can be further conveniently controlled, and the space occupied by the pure water pipe 200 can be further conveniently reduced, so that the service life of the front filter element 10 of the composite filter element is prolonged.

Advantageously, the plain water pipe has an internal diameter of 2 to 6 mm. Therefore, the flow rate of water in the pure water pipe 200 can be conveniently ensured, and the water outlet flow rate of the front filter element 10 of the composite filter element is ensured.

More advantageously, the plain water pipe 200 has an inner diameter of 3 to 5 mm. Here preferably 4 mm. Therefore, the flow rate of the pure water pipe 200 can be further ensured, and the water outlet flow rate of the front filter element 10 of the composite filter element can be further ensured.

Specifically, as shown in fig. 2 and 3, the outer circumferential surface of the deionized water pipe 200 is spaced apart from the inner circumferential surface of the pre-filter 100. Specifically, as shown in fig. 3, raw water enters the outside of the pre-filter 100 through the raw water inlet, enters between the pre-filter 100 and the pure water pipe 200 through the filtration of the pre-filter 100, and is discharged through the pre-water outlet. This can facilitate smooth discharge of the pad water.

More specifically, as shown in fig. 1-6, the upper end cap 300 includes at least an adapter 330, and the upper end of the deionized water pipe 200 fits within the adapter 330. Thus, the adapter 330 can be used to connect the pure water pipe 200 and the pure water outlet, thereby facilitating the discharge of pure water.

Advantageously, as shown in fig. 5 and 11, an upper sealing ring 340 is disposed between the adapter 330 and the deionized water pipe 200, and a lower sealing ring 430 is disposed between the lower end cap 400 and the deionized water pipe 200. This improves the sealing performance between the deionized water pipe 200 and the adapter 330 and between the deionized water pipe 200 and the lower end cap 400.

The present application is based on the discovery and recognition by the inventors of the following facts and problems:

further, the inventors of the present application have found that, since the plain water pipe 200 is an extruded flat pipe member having a flat outer peripheral surface, it is difficult to position the seal ring on the plain water pipe 200, and the seal ring may not be mounted in place or may be displaced after being mounted, thereby affecting the sealing performance.

Advantageously, as shown in figures 5 and 11, an upper retaining groove 332 is provided in the adapter 330, a lower retaining groove 412 is provided in the lower end cap 400, the upper sealing ring 340 fits within the upper retaining groove 332, and the lower sealing ring 430 fits within the lower retaining groove 412. Therefore, the structure for positioning the sealing ring can be formed on the adapter 330 and the lower end cover 400, on one hand, the positioning structure is not required to be formed on the pure water pipe 200, the pipe diameter of the pure water pipe 200 is convenient to control, on the other hand, the positioning effect on the sealing ring can be convenient to improve, the situation that the sealing ring is not installed in place or is displaced after being installed is avoided, and the sealing effect of the sealing ring is ensured.

The present application is based on the discovery and recognition by the inventors of the following facts and problems:

further research conducted by the applicant of the present application has found that the upper and lower positioning grooves 332 and 412 are directly formed by the inner circumferential surfaces of the adaptor 330 and the lower end cap 400, which may cause difficulty in installing the sealing rings.

Advantageously, as shown in fig. 5-10, the upper end cap 300 includes an upper cap body 310, an adapter 330, and an upper positioning member 320, wherein an upper mounting hole 313 is formed in the upper cap body 310, the upper positioning member 320 is mounted in the upper mounting hole 313, an upper plain water pipe through hole 331 is formed in the adapter 330, an upper positioning groove 332 is formed on an inner circumferential surface of the upper plain water pipe through hole 331, the upper positioning member 320 is fitted in the upper positioning groove 332, and an upper end of the plain water pipe 200 is fitted in the upper plain water pipe through hole 331. The upper sealing ring 340 is fitted in the upper positioning groove 332 and axially clamped between the upper positioning member 320 and the upper positioning groove 332, and the upper sealing ring 340 is sleeved outside the pure water pipe 200. Specifically, during installation, the upper sealing ring 340 may be first installed in the upper positioning groove 332, and then the upper positioning member 320 and the adapter 330 are installed together, so that the upper sealing ring 340 is clamped between the upper positioning member 320 and the upper positioning groove 332 of the adapter 330, thereby positioning the upper sealing ring 340. From this can set up upper end cover 300 into a plurality of split pieces, compare the technical scheme of the direct formation of constant head tank at adapter 330 inner peripheral surface, can be convenient for go up the installation of sealing washer 340.

More advantageously, the upper positioning groove 332 communicates with the lower end surface of the adapter 330, and the upper sealing ring 340 is clamped between the inner top surface of the upper positioning groove 332 and the upper end surface of the upper positioning member 320. This allows the upper seal 340 to be received in the upper retaining groove 332 through the lower end surface of the adapter 330 during installation, thereby further facilitating installation of the upper seal 340.

Specifically, as shown in fig. 5 to 10, the inner circumferential surface of the upper positioning groove 332 is further provided with a mounting groove 333 communicated with the lower end surface of the adapter 330, the outer circumferential surface of the upper positioning member 320 is provided with a positioning ring platform 323, and the positioning ring platform 323 abuts against the inner top surface of the mounting groove 333. Therefore, the installation of the upper positioning piece 320 is facilitated, the relative positions of the upper positioning piece 320 and the adapter 330 are ensured by utilizing the positioning ring platform 323, the installation in place is ensured, and the stability after the installation is improved.

More specifically, as shown in fig. 5 to 10, a rotary latch 334 and a communication groove 335 are disposed on an inner circumferential surface of the mounting groove 333, the communication groove 335 communicates the rotary latch 334 with a lower end surface of the adapter 330, the upper positioning member 320 is disposed with a first rotary latch 321, and the first rotary latch 321 is adapted to pass through the communication groove 335 and further fit into the rotary latch 334 through relative rotation between the upper positioning member 320 and the adapter 330. This may facilitate installation of the upper spacer 320 and the adapter 330.

Further, as shown in fig. 5-10, the upper positioning member 320 is provided with a first rotating buckle 321, the upper cover 310 is provided with a rotating positioning rib 311, the rotating positioning rib 311 is provided with a notch 312, and the second rotating buckle 322 is adapted to pass through the notch 312 and further stop on the rotating positioning rib 311 through the relative rotation between the upper positioning member 320 and the upper cover 310. This may facilitate the installation of the upper positioning member 320 and the upper cover 310.

Specifically, the first and second rotary catches 321 and 322 may be both two.

Alternatively, as shown in fig. 5, the upper sealing ring 340 is plural and arranged in the axial direction. Specifically, the number of the upper seal rings 340 may be two. This can further improve the sealing property.

In one specific example of the present invention, the upper deionized water pipe passage hole 331 has a diameter of 4-8 mm.

According to the pre-filter element 10 of the composite filter element provided by the embodiment of the utility model, the diameter of the upper plain water pipe through hole 331 is 4-8 mm, and the pre-filter element can be adapted to a plain water pipe with an outer diameter of 4-8 mm, so that compared with the pre-filter element in the related art, the space occupied by the plain water pipe 200 can be reduced, the fillable volume of the pre-filter element 100 can be increased, the dirt accommodating area of the pre-filter element 100 can be increased, and the service life of the pre-filter element 10 can be prolonged.

Advantageously, the upper plain water pipe passage 331 is 5-7 millimeters in diameter. Thus, the upper plain water pipe through hole 331 can be adapted to a plain water pipe with an outer diameter of 5-7 mm. Therefore, the outer diameter of the pure water pipe 200 can be further conveniently controlled, and the space occupied by the pure water pipe 200 can be further conveniently reduced, so that the service life of the front filter element 10 of the composite filter element is prolonged.

Specifically, as shown in fig. 5, a second seal 350 is disposed around the adapter 330. Thereby facilitating improved sealing between the adapter 330 and other structures of the composite filter element 1. Specifically, the adapter 330 may be coupled to the waterway adapter cover of the composite filter element 1, and the second sealing ring 350 may improve the sealing performance therebetween.

More specifically, as shown in fig. 5, the third sealing ring 360 is sleeved on the outer circumferential surface of the upper cover 310. Thereby facilitating the improvement of the sealing performance between the upper cover body 310 and other structures of the composite filter element 1. Specifically, the upper cover 310 may be coupled to the main filter element adapter cover of the composite filter element 1, and the third sealing ring 360 may improve the sealing performance therebetween.

Advantageously, as shown in fig. 11 to 13, the lower cap 400 includes a lower cap body 410, a lower positioning member 420, a lower deionized water pipe passing hole 411 is provided in the lower cap body 410, a lower positioning groove 412 is provided on an inner circumferential surface of the lower deionized water pipe passing hole 411, the lower positioning member 420 is installed in the lower positioning groove 412, and a lower end of the deionized water pipe 200 is fitted in the lower deionized water pipe passing hole 411. The lower sealing ring 430 is fitted in the lower positioning groove 412 and axially clamped between the lower positioning member 420 and the lower positioning groove 412, and the lower sealing ring 430 is sleeved outside the deionized water pipe 200. Specifically, during installation, the lower seal ring 430 may be first installed in the lower positioning groove 412, and then the lower positioning member 420 and the lower cover 410 are installed together, so that the lower seal ring 430 is clamped between the lower positioning member 420 and the lower positioning groove 412 of the lower cover 410, thereby positioning the lower seal ring 430. From this can set up lower end cover 400 into a plurality of split pieces, compare the technical scheme of constant head tank direct formation at lower end cover 400 inner peripheral surface, can be convenient for lower sealing washer 430's installation.

More advantageously, as shown in fig. 11 to 13, the lower positioning groove 412 communicates with the upper end surface of the lower cap 400, and the lower packing 430 is clamped between the inner bottom surface of the lower positioning groove 412 and the lower end surface of the lower positioning member 420. This allows the lower sealing ring 430 to be fitted into the lower positioning groove 412 through the upper end surface of the lower cover 410 during installation, thereby further facilitating installation of the lower sealing ring 430.

Specifically, as shown in fig. 11-13, an axial positioning groove 413 is formed on an inner circumferential surface of the lower positioning groove 412, an axial positioning buckle 421 is formed on an outer circumferential surface of the lower positioning member 420, and the axial positioning buckle 421 is engaged in the axial positioning groove 413. Thus, the axial positioning of the lower positioning member 420 and the lower cover 410 can be achieved by the axial positioning slot 413 and the axial positioning buckle 421.

More specifically, as shown in fig. 11 to 13, the inner circumferential surface of the lower positioning groove 412 is provided with a circumferential positioning groove 414, the outer circumferential surface of the lower positioning member 420 is provided with a circumferential positioning boss 422, and the circumferential positioning boss 422 is fitted in the circumferential positioning groove 414. This enables the circumferential positioning of the lower positioning member 420 and the lower cover 410 using the circumferential positioning groove 414 and the circumferential positioning boss 422.

Therefore, the axial and circumferential positioning of the lower cover 410 and the lower positioning member 420 can be realized, and the installation of the lower cover and the lower positioning member is convenient.

Further, as shown in fig. 11-13, the circumferential positioning groove 414 is communicated with the upper end surface of the lower cover 410, and the circumferential positioning boss 422 protrudes out of the upper end surface of the lower positioning member 420. Whereby the installation of the lower spacer 420 can be facilitated.

Specifically, both the axial positioning catch 421 and the circumferential positioning boss 422 may be two.

The lower seal rings 430 are plural and arranged in the axial direction. Specifically, the number of the lower seal rings 430 may be two. This can further improve the sealing property.

More specifically, the outer circumferential surface of the lower cover 410 is fitted with a fourth packing 440. Therefore, the sealing performance between the lower cover body 410 and other structures of the composite filter element 1 can be improved conveniently. Specifically, the lower cover 410 may be fitted to the inner cylinder of the composite filter element 1, and the fourth seal ring 440 may improve the sealing property therebetween.

In one specific example of the present invention, the diameter of the lower plain water pipe passage 411 is 4-8 mm.

According to the front filter element 10 of the composite filter element provided by the embodiment of the utility model, the diameter of the lower plain water pipe through hole 411 is 4-8 mm, and the front filter element can be adapted to a plain water pipe with the outer diameter of 4-8 mm, so that compared with the front filter element in the related art, the space occupied by the plain water pipe 200 can be reduced, the fillable volume of the front filter element 100 can be increased, the dirt accommodating area of the front filter element 100 can be increased, and the service life of the front filter element 10 can be prolonged.

Advantageously, the diameter of the lower plain water pipe through hole 411 is 5-7 mm. Therefore, the outer diameter of the pure water pipe 200 can be further conveniently controlled, and the space occupied by the pure water pipe 200 can be further conveniently reduced, so that the service life of the front filter element 10 of the composite filter element is prolonged.

Of course, the plain water pipe 200 may be sealed in other ways.

For example, the adapter 330 is welded to the deionized water pipe 200 and the lower cap 400 is welded to the deionized water pipe 200. In this way, the sealing between the adapter 330 and the deionized water pipe 200 and between the lower end cap 400 and the deionized water pipe 200 can be realized without arranging a sealing ring and a positioning structure.

For another example, the adapter 330 is interference fit with the deionized water pipe 200 and the bottom cap 400 is interference fit with the deionized water pipe 200. In this way, the sealing between the adapter 330 and the deionized water pipe 200 and between the lower end cap 400 and the deionized water pipe 200 can be realized without arranging a sealing ring and a positioning structure.

It can be understood by those skilled in the art that the sealing manners of the "sealing ring", "welding" and "interference fit" can be selected according to actual needs, and can be arranged and combined or used simultaneously.

Fig. 2 and 3 show a front cartridge 10 of a composite cartridge according to one particular example of the utility model. As shown in fig. 2 and 3, the pre-filter 100 includes an inner filter 110 and an outer filter 120. Thus, two kinds of filter materials with different performances can be used to form the pre-filter material 100, so that different filtering functions and effects can be realized conveniently, and the filtering effect and flexibility of the pre-filter material 100 are improved.

Specifically, the inner layer filter material 110 is a wet-process-formed composite activated carbon filter material, and the outer layer filter material 120 is a folded PP filter material. Specifically, the wet-formed composite activated carbon filter material is a filter material which is cast by carbon fibers and carbon powder through a wet method. Therefore, compared with the PAC filter material in the related art, the pollution receiving area of the pre-filter material 100 can be further increased conveniently, and the service life of the pre-filter material 100 is further prolonged.

A composite filter element 1 according to an embodiment of the present invention is described below. The composite filter element 1 according to the embodiment of the present invention includes a front filter element 10 of the composite filter element according to the above-described embodiment of the present invention.

The composite filter element 1 according to the embodiment of the present invention has advantages of long life and the like by using the front filter element 10 of the composite filter element according to the above-described embodiment of the present invention.

Specifically, as shown in fig. 14 to 17, the composite filter element 1 further includes a waterway adapter cap 20, a main filter adapter cap 30, an inner cylinder 40, a post filter 50, a main filter 60, a central tube 70, and an outer cylinder 80.

The main filter adapter cap 30 is arranged outside the upper end cap 300, the waterway adapter cap 20 is arranged above the main filter adapter cap 30, the inner cylinder 40 is sleeved outside the front filter material 100, the rear filter material 50 is arranged below the inner cylinder 40, the central tube 70 is sleeved outside the inner cylinder 40, the main filter material 60 is sleeved outside the central tube 70 and connected with the main filter adapter cap 30, and the outer cylinder 80 is sleeved outside the main filter material 60 and connected with the waterway adapter cap 20.

The waterway conversion cover 20 is provided with a handle 21, a decoration cover 22 and a conversion joint 23.

The lower end of the post-filter material 50 is provided with a post-filter end cap 51.

The main filter material is RO membrane. The rear filter material is a carbon rod.

A gap of 1-2 mm is provided between the inner cylinder 40 and the central tube 70.

The post-filter material 50 and the bottom of the inner cylinder 40 and the post-filter material 50 and the post-filter end cap 51 are bonded by glue

Adapter 23 is a plurality ofly and including raw water joint, leading joint, main joint, pure water joint, waste water joint.

Specifically, as shown in fig. 16, raw water enters between the pre-filter 100 and the inner cylinder 40 through the raw water joint, enters between the pre-filter 100 and the pure water pipe 200 after being filtered by the pre-filter 100, is discharged through the pre-joint, is pressurized by the water pump, returns into the composite filter element 1 through the main filter joint, flows into between the main filter 60 and the outer cylinder 80, enters from the bottom of the main filter 60, and flows out through the waste water joint at the upper end of the main filter 60, while pure water enters into the gap between the central tube 70 and the inner cylinder 40 through the hole of the central tube 70, and then flows toward the post-filter 50. After being filtered by the post-filter 50, pure water flows out from the pure water pipe 200 in the middle of the pre-filter 10 and is finally discharged through the pure water joint.

Other constructions and operations of the composite filter element 1 according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a lower end cover of leading filter core of composite filter core which characterized in that includes:

the lower cover body is internally provided with a lower pure water pipe through hole, and the inner peripheral surface of the lower pure water pipe through hole is provided with a lower positioning groove;

the lower positioning piece is arranged in the lower positioning groove;

the lower sealing ring is matched in the lower positioning groove and axially clamped between the lower positioning piece and the lower positioning groove, and the diameter of the lower pure water pipe through hole is 4-8 mm.

2. The lower end cap of a pre-filter cartridge of a composite filter cartridge as claimed in claim 1, wherein the diameter of the lower plain water pipe through hole is 5-7 mm.

3. The lower end cap of a front filter element of a composite filter element according to claim 1, wherein the lower positioning groove is communicated with the upper end surface of the lower end cap, and the lower sealing ring is clamped between the inner bottom surface of the lower positioning groove and the lower end surface of the lower positioning piece.

4. The lower end cover of a front filter element of a composite filter element as claimed in claim 1, wherein an axial positioning groove is formed in the inner circumferential surface of the lower positioning groove, and an axial positioning buckle is formed in the outer circumferential surface of the lower positioning member and is clamped in the axial positioning groove.

5. The lower end cover of a front filter element of a composite filter element according to claim 1, wherein the inner circumferential surface of the lower positioning groove is provided with a circumferential positioning groove, and the outer circumferential surface of the lower positioning piece is provided with a circumferential positioning boss, and the circumferential positioning boss is matched in the circumferential positioning groove.

6. The lower end cap of a front filter element of a composite filter element according to claim 5, wherein the circumferential positioning groove is communicated with the upper end surface of the lower cap body.

7. The lower end cap of a front filter element of a composite filter element according to claim 5, wherein the circumferential positioning boss protrudes out of the upper end surface of the lower positioning member.

8. The lower end cap of a front cartridge of a composite cartridge of claim 1, wherein the lower seal ring is plural and arranged in an axial direction.

9. The lower end cover of a front filter element of a composite filter element according to claim 1, wherein a fourth sealing ring is sleeved on the outer peripheral surface of the lower cover body.

10. A composite filter element, comprising a lower end cap of a front filter element of a composite filter element according to any one of claims 1 to 9.

Images