CN214360582U - Front-rear composite filter element - Google Patents

Abstract

The present disclosure relates to a front-rear composite filter element, which comprises: the composite filter element shell is provided with a tap water inlet, a purified water outlet and a purified water inlet and outlet; the front filter element comprises a front filter element shell and a front filter element main body, the front filter element shell comprises a front upper end cover, a front lower end cover and a flow guide shell, and the flow guide shell is provided with a water through hole; the front filter element main body is positioned in an external annular cavity formed by the front filter element shell; the water drive tank is fixedly connected with the composite filter element shell, is positioned in an internal cylindrical cavity formed by the front filter element shell and comprises a water drive tank end cover and a water drive tank water bag; the rear filter element comprises a rear filter element shell and a rear filter element main body; the rear filter element shell is positioned in the water drive tank and comprises a rear upper end cover and a rear lower end cover, the rear filter element main body is an annular cylinder and is positioned in the rear filter element shell, and a middle cavity of the rear filter element main body is communicated with the pure water inlet and outlet through a hollow area of the rear upper end cover. This technical scheme can reduce the whole volume of water purifier.

Description

Front-rear composite filter element

Technical Field

The utility model relates to a water purification technology field especially relates to a leading composite filter core.

Background

Along with the improvement of living standard of people, people pay more and more attention to water quality sanitation, and a trend of equipping a water purifier for families is formed; if the water purifier is not used for a long time, ions in front of an RO (Reverse Osmosis) membrane in an RO (Reverse Osmosis) filter element in the water purifier penetrate through the RO membrane to permeate to a pure water end, so that TDS (Total dissolved solids) of first cup water is high, and user experience is influenced.

In order to solve the problems, a water tank or a water-driven tank can be independently arranged in the water purifier to realize the pure water bubble film technology in the prior art, but the independent water tank or the water-driven tank can occupy the inner space of the water purifier, so that the whole volume of the water purifier is large, and the installation of other household appliances in the water tank cabinet is influenced.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the embodiments of the present disclosure provide a front-rear composite filter element. The technical scheme is as follows:

according to an aspect of the embodiments of the present disclosure, there is provided a front-rear composite filter element, including:

the composite filter element shell is provided with a tap water inlet, a purified water outlet and a purified water inlet and outlet;

the front filter element comprises a front filter element shell and a front filter element main body, wherein the front filter element main body is fixed in the composite filter element shell and comprises a front upper end cover, a front lower end cover and a flow guide shell, the front upper end cover is a hollow annular cover body, the front lower end cover is a plate-type cover body, the flow guide shell is a cylindrical shell with a hollow inner part, the lower end of the flow guide shell is connected with the front lower end cover, the front filter element shell forms an outer annular cavity positioned on the outer side of the flow guide shell and an inner cylindrical cavity positioned on the inner side of the flow guide shell, the outer annular cavity is communicated with a tap water inlet, and the flow guide shell is provided with a water passing hole; the preposed filter element main body is an annular cylinder and is positioned in the outer annular cavity;

the water drive tank is positioned in the inner cylindrical cavity and comprises a water drive tank end cover fixedly connected with the composite filter element shell and a water drive tank water bag fixedly connected with the water drive tank end cover, a bag opening of the water drive tank water bag is communicated with the pure water inlet and outlet, and a pure water cavity between the water drive tank and the front filter element shell is communicated with the pure water outlet;

the rear filter element comprises a rear filter element shell and a rear filter element main body; the rear filter element shell is positioned in the water drive tank and comprises a rear upper end cover and a rear lower end cover, the rear upper end cover is a hollow annular cover body and is fixedly connected with the composite filter element shell, and the rear lower end cover is a plate-type cover body; the rear filter element main body is an annular cylinder and is positioned in the rear filter element shell, and a middle cavity of the rear filter element main body is communicated with the pure water inlet and outlet through a hollow area of the rear upper end cover.

In one embodiment, the post-filter is located in or above the water-drive tank water bag.

In one embodiment, said pure water inlet and outlet comprises an interface;

correspondingly, the sack intercommunication of water drive jar water bag the pure water is imported and exported, includes: the bag mouth of the water-drive tank water bag is communicated with the pure water inlet and outlet through the rear filter element main body.

In one embodiment, the pure water inlet and outlet comprises two interfaces of a pure water inlet and a pure water outlet;

correspondingly, the middle cavity of the rear filter element main body is communicated with the pure water inlet and outlet through the hollow area of the rear upper end cover, and the pure water inlet and outlet comprise: the middle cavity of the rear filter element main body is communicated with one interface of the pure water inlet and outlet through the hollow area of the rear upper end cover;

the sack intercommunication of water drive jar water bag pure water import and export includes: the bag mouth of the water-drive tank water bag is communicated with the other interface of the pure water inlet and outlet through a cavity between the water-drive tank and the rear filter element main body.

In one embodiment, the rear cartridge housing further comprises a central conduit;

correspondingly, the middle cavity of the rear filter element main body is communicated with one interface of the pure water inlet and outlet through the hollow area of the rear upper end cover, and the interface comprises: the central pipeline is positioned in a middle cavity of the rear filter element main body, passes through a hollow area of the rear upper end cover and the rear lower end cover and is communicated with the water-drive tank water bag and one interface of the pure water inlet and outlet;

the sack of water-drive jar water bag passes through water-drive jar with cavity intercommunication between the rearmounted filter core main part another interface in the pure water import and export includes: the bag mouth of the water-drive tank water bag is communicated with the rear filter element main body through a cavity between the water-drive tank and the rear filter element main body, and the cavity between the rear filter element main body and the central pipeline is communicated with the other interface of the pure water inlet and outlet.

In one embodiment, the pure water inlet and outlet, the tap water inlet and the pure water outlet are located at the top of the composite filter element shell.

In one embodiment, the tap water inlet is located at one end of the composite filter element shell, and the purified water outlet and the purified water inlet and outlet are located at opposite ends of the tap water inlet.

In one embodiment, the purified water outlet is located at one end of the composite filter element shell, and the tap water inlet and the purified water inlet and outlet are located at opposite ends of the purified water outlet; an opening is formed in the lower end cover and communicated with the purified water outlet.

In one embodiment, the pure water inlet and outlet is located at one end of the composite filter element shell, the tap water inlet and the purified water outlet are located at opposite ends of the pure water inlet and outlet, and the lower end cover is provided with an opening which is communicated with the purified water outlet.

In one embodiment, the water drive tank water bag comprises an elastic water bag.

In one embodiment, the water drive can end is provided with a stop plate located below the rear lower end for inhibiting downward movement of the rear lower end.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

this embodiment can be with water drive jar structure with put the filter core integration around with and form above-mentioned leading composite filter core, set up the problem that water drive jar increased the volume alone when solving water purifier pure water bubble membrane and water demand, reduce the whole volume of water purifier, reduce the occupation space of water purifier in the basin cabinet, make things convenient for the installation of other household electrical appliances in the basin cabinet.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1a is a schematic diagram illustrating a front-to-back composite filter element according to an exemplary embodiment.

Fig. 1b is a schematic diagram of a front-to-back composite filter element according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating two front-to-back composite filter elements according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating two front and rear composite filter elements according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating the construction of three front-to-back composite filter elements according to an exemplary embodiment.

Fig. 5 is a schematic diagram illustrating the construction of three front-to-back composite filter elements according to an exemplary embodiment.

Fig. 6 is a schematic diagram illustrating the construction of three front-to-back composite filter elements according to an exemplary embodiment.

Fig. 7 is a schematic diagram illustrating the construction of three front-to-back composite filter elements according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a leading and back composite filter element, this leading and back composite filter element includes composite filter element casing and sets up the leading filter core in this composite filter element casing, rearmounted filter core and water drive jar, so with water drive jar, leading filter core and rearmounted filter core integration together form leading and back composite filter element, set up the problem that water drive jar increases the volume alone when can solving water purifier pure water bubble membrane and water demand, simplify water purifier spare part quantity, it integrates to improve the complete machine, make the complete machine volume littleer, reduce the occupation space of water purifier in the basin cabinet, make things convenient for the installation of other household electrical appliances in the basin cabinet.

Fig. 1a is a schematic diagram illustrating a front-to-back composite filter element according to an exemplary embodiment, and the structure of the front-to-back composite filter element can be described as follows with reference to fig. 1 a:

as shown in fig. 1a, the composite filter element shell 11 is provided with a tap water inlet 111, a purified water outlet 112 and a purified water inlet and outlet 113; the tap water inlet 111 is communicated with an external tap water inlet through a tap water pipeline of the water purifier, and is used for enabling external tap water to enter the front and rear composite filter elements, the purified water outlet 112 is a water outlet for purified water purified by the front filter elements in the front and rear composite filter elements, the purified water inlet and outlet 113 is communicated with a water inlet and outlet of the water drive tank 14, and the purified water in the water drive tank 14 enters and exits a corresponding pipeline in the water purifier through the purified water inlet and outlet 113. The pure water inlet/outlet 113 may be one interface or two interfaces, for example, the pure water inlet/outlet 113 in the front and rear filter elements shown in fig. 1a includes two interfaces, in this case, the pure water inlet/outlet 113 includes a pure water inlet 1131 for inputting pure water into the water drive tank 14, and a pure water outlet 1132 for supplying pure water out of the water drive tank 14.

As shown in fig. 1a, the front filter element includes a front filter element housing 12 and a front filter element main body 13, wherein the front filter element housing 12 is fixed in the composite filter element housing 11, and includes a front upper end cap 121, a front lower end cap 122 and a flow guiding shell 123, the front upper end cap 121 is a hollow annular cap, the front lower end cap 122 is a plate-type cap, the flow guiding shell 123 is a cylindrical housing with a hollow interior, the upper end of the flow guiding shell 123 can be connected to the front upper end cap 121 as shown in fig. 1a, so that the hollow interior of the flow guiding shell 123 is communicated with the hollow area of the annular cap, at this time, the front upper end cap 121 is connected to the composite filter element housing 11, or the upper end of the flow guiding shell 123 can directly penetrate through the front upper end cap 121 to connect to the composite filter element housing 11, at this time, the front upper end cap 121 can be connected to the flow guiding shell 123 and can also be connected to the composite filter element housing 11, the lower end of the diversion shell 123 is connected to the front lower end cover 122, so that the front filter element shell 12 can form an internal cylindrical cavity with an open upper end and a closed lower end, the internal cylindrical cavity is located inside the diversion shell 123, the front filter element shell 12 also forms an external annular cavity located outside the diversion shell 123, the external annular cavity is communicated with the tap water inlet 111, and the diversion shell 123 is provided with a water through hole 1231; the front filter element main body 13 is an annular cylinder and is positioned in the outer annular cavity; here, the opening between the outer side walls of the front upper end cap 121 and the front lower end cap 122 is a water inlet of the front filter element, the water passing hole 1231 on the baffle shell 123 is a water outlet of the front filter element, the water inlet of the front filter element is communicated with the tap water inlet 111 through the cavity between the front filter element and the composite filter element shell 11, so that tap water entering from the tap water inlet 111 can enter the front filter element main body 13 from the water inlet of the front filter element, and flows out from the water passing hole after being filtered by the front filter element main body 13, and then can flow to the reverse osmosis filter element through a corresponding pipeline for further filtration treatment.

Here, the front filter element main body 13 includes at least one filter material selected from PP cotton, activated carbon, folded paper PP, and non-woven fabric. The PP cotton can also be called filling cotton and is common artificial chemical fiber, the material is polypropylene fiber for artificial chemical fiber, and large-particle substances such as colloid impurities, micro-mud, rust, worm eggs, organic pollution mineral impurities and the like in tap water are filtered. This leading filter core is mainly for subsequent reverse osmosis filter core is the preliminary treatment, filters large granule material, prevents that devices such as reverse osmosis filter core on the follow-up water route from being damaged, prolongs the life-span of water purifier.

As shown in fig. 1a, the water-drive tank 14 is located in the inner cylindrical cavity, and includes a water-drive tank end cap 141 fixedly connected to the composite filter element housing 11 and a water-drive tank water bag 142 fixedly connected to the water-drive tank end cap 141, a mouth of the water-drive tank water bag 142 is communicated with the pure water inlet 113, and for example, as shown in fig. 1a, a mouth of the water-drive tank water bag 142 is communicated with the pure water inlet 1131 of the pure water inlet 113 through the cavity between the water-drive tank 14 and the rear filter element. The clean water cavity between the water drive tank 14 and the front filter element shell 12 is communicated with the clean water outlet 112; here, the water drive can end 141 is secured to the composite cartridge housing 11, for example, the water drive can end 141 may be secured directly to the composite cartridge housing 11 as shown in fig. 1 a; alternatively, the water drive can end 141 can be fixed to the composite filter cartridge housing 11 by the upper end 121, such as the upper end 121 is fixed to the composite filter cartridge housing 11, the water drive can end 141 is fixedly connected to an inner annular sidewall of the upper end 121, and the like, or the water drive can end 141 can be fixed to the baffle shell 123, and is fixedly connected to the composite filter cartridge housing 11 by the baffle shell 123, and the like.

As shown in fig. 1a, the rear filter cartridge includes a rear filter cartridge housing 15 and a rear filter cartridge body 16; the rear filter element shell 15 is located in the water drive tank 14 and includes a rear upper end cover 151 and a rear lower end cover 152, the rear upper end cover 151 is a hollow annular cover body and is fixedly connected with the composite filter element shell 11, and the rear lower end cover 152 is a plate-type cover body; the rear filter element main body 16 is an annular cylinder, and is located in the rear filter element housing 15, that is, in an area between the rear upper end cap 151 and the rear lower end cap 152, the middle cavity of the rear filter element main body 16 is communicated with the pure water inlet/outlet 113 through the hollow area of the rear upper end cap 151, for example, as shown in fig. 1a, the middle cavity of the rear filter element main body 16 is communicated with the pure water outlet 1132 of the pure water inlet/outlet 113 through the hollow area of the rear upper end cap 151.

It should be noted that, the rear filter element main body may include, but is not limited to, at least one of the following filter materials: the activated carbon, PP cotton, folded paper PP, ultrafiltration membranes, microfiltration membranes, mineralizers and the like are used for further filtering the flowing pure water, filtering out particle impurities and some colored impurities in the water, and are mainly used for improving the taste of the pure water, inhibiting bacteria and resisting bacteria and intercepting microorganisms.

Here, taking the pure water inlet/outlet 113 including two interfaces, namely, the pure water inlet 1131 and the pure water outlet 1132, shown in fig. 1a as an example, the water inlet/outlet flow of the front-rear composite filter element is described: the front and rear composite filter element is usually arranged behind an external tap water port of the whole water purifier, external tap water enters the water purifier from the external tap water port of the whole water purifier, and then enters the front and rear composite filter element through a tap water inlet 111 on the composite filter element, purified water obtained after filtration treatment by the front filter element main body 13 in the outer annular cavity can enter the inner cylindrical cavity from a water through hole 1231 of the diversion shell 123, and flows to the purified water outlet 112 through the purified water cavity between the water driving tank 14 and the front filter element shell 12, so that the purified water produced by the front and rear composite filter element can flow out from the purified water outlet 112, and then flows into the reverse osmosis filter element through a corresponding water pipeline to further purify the purified water to obtain the purified water.

Here, the pure water produced by the reverse osmosis filter element can enter the front and rear composite filter elements through the pure water inlet 1131, and enter the water-driving tank water bag 142 from the bag opening of the water-driving tank water bag 142 through the cavity between the water-driving tank 14 and the rear filter element to store water; the water-driving tank water bag 142 is discharged from the bag opening to the cavity between the water-driving tank 14 and the rear filter element when discharging water, enters the rear filter element main body 16 from the cavity, is filtered by the rear filter element main body 16, passes through the middle cavity of the rear filter element main body 16, and is discharged from the pure water outlet 1132 in the pure water inlet/outlet 113, so as to be used by a user or a pure water bubble membrane after backflow.

Here, the purified water cavity between the water-driving tank water bag 142 and the diversion shell 123 is used for accommodating purified water purified by the front filter element, and the purified water in the purified water cavity can play a role in regulating the amount of purified water stored in the water-driving tank water bag 142. When the pressure of the pure water in the water-drive tank water bag 142 is greater than the pressure of the pure water in the pure water cavity, the water-drive tank 14 needs to be filled with water and store water, and at the moment, the water-drive tank water bag 142 presses the pure water in the pure water cavity to discharge the pure water in the pure water cavity, so that the volume of the pure water in the water-drive tank water bag 142 is increased; when the pressure of the pure water in the water-driving tank water bag 142 is lower than the pressure of the pure water in the pure water cavity, the water-driving tank 14 drains, and the volume of the pure water in the pure water cavity is increased to squeeze the water-driving tank water bag 142, so as to drain the pure water in the water-driving tank water bag 142.

It should be noted here that the connection of the components in the composite filter element housing 11 can enable only the above-mentioned regions in the composite filter element housing 11 where the water flows can flow to be communicated, and other regions not limited to be communicated are not communicated, and the regions can be blocked by the connection between the components, and there are various specific blocking implementation manners, such as the blocking by a sealant, which are not exemplified herein.

This embodiment can be with water drive jar structure with put the filter core integration around with and form above-mentioned leading composite filter core, reduce the whole volume of water purifier, set up the problem that water drive jar increases the volume alone when solving water purifier pure water bubble membrane and water demand, reduce the occupation space of water purifier in the basin cabinet, make things convenient for the installation of other household electrical appliances in the basin cabinet.

In one possible embodiment, fig. 1b is a schematic diagram of a front-back composite filter element according to an exemplary embodiment, and the rear filter element can be located in the water-driven water tank 142 as shown in fig. 1b, or above the water-driven water tank 142 as shown in fig. 1 a.

Here, the difference between fig. 1a and fig. 1b is the relative position between the post-filter and the water-driving water tank 142, and the rest of the structure and the water inlet and outlet flow path are the same, and reference may be made to the above description of fig. 1a, and detailed description thereof will not be provided.

In a possible embodiment, fig. 2 is a schematic structural diagram of two front-back composite filter elements according to an exemplary embodiment, wherein the rear filter element shown in a in fig. 2 is located above the water-driving water tank 142, and the rear filter element shown in B in fig. 2 can also be located in the water-driving water tank 142. As shown in fig. 2 a and B, the pure water inlet/outlet 113 includes an interface; correspondingly, the bag mouth of the water-driving water-containing bag 142 is communicated with the pure water inlet and outlet 113, and comprises: the bag mouth of the water-driving tank water bag 142 is communicated with the pure water inlet 113 through the post-filter element body 16.

Thus, pure water produced by the reverse osmosis filter element can enter the front and rear composite filter elements through the pure water inlet 113 and outlet 113, enter the rear filter element body 16 from the middle cavity of the rear filter element body 16, and after being filtered by the rear filter element body 16, enter the water drive tank 142 from the bag opening of the water drive tank 142 to store water through the cavity between the water drive tank 14 and the rear filter element; the water bag 142 is discharged from the bag opening to the cavity between the water tank 14 and the rear filter element, enters the rear filter element body 16 from the cavity, is filtered by the rear filter element body 16, passes through the middle cavity of the rear filter element body 16, and is discharged from the pure water inlet/outlet 113 for backflow to perform pure water membrane soaking or user use. So, the pure water of business turn over this water drive jar water bag 142 all passes through the filtration of this rearmounted filter core main part, improves the water quality, and can also practice thrift a interface, reduces the water route pipeline in the water purifier, and the installation is simpler.

In one possible embodiment, as shown in fig. 1a, the pure water inlet/outlet 113 comprises two interfaces, namely a pure water inlet 1131 and a pure water outlet 1132; correspondingly, the middle cavity of the rear filter element main body 16 is communicated with the pure water inlet/outlet 113 through the hollow area of the rear upper end cover 151, and comprises: the middle cavity of the rear filter element main body 16 is communicated with one interface of the pure water inlet and outlet 113, such as a pure water outlet 1132, through the hollow area of the rear upper end cover 151; the bag mouth of the water-driving tank water bag 142 is communicated with the pure water inlet and outlet 113, and comprises: the bag mouth of the water-driving tank water bag 142 is communicated with another interface of the pure water inlet and outlet 113, such as a pure water inlet 1131, through the cavity between the water-driving tank 14 and the rear filter element main body 16. For a specific water flow, reference may be made to the description of fig. 1a in the foregoing embodiment, which is not described herein again. Or, in this embodiment, one of the ports of the middle cavity of the rear filter element body 16, which is communicated with the pure water inlet and outlet 113 through the hollow area of the rear upper end cap 151, is a pure water inlet, and the other of the ports of the bag mouth of the water-driving tank water bag 142, which is communicated with the pure water inlet and outlet 113 through the cavity between the water-driving tank 14 and the rear filter element body 16, is a pure water outlet, which can be referred to in fig. 1a specifically, only the pure water inlet 1131 in fig. 1a is used as a pure water outlet, the pure water outlet 1132 in fig. 1a is used as a pure water inlet, and the specific flow of the pure water inlet and outlet is opposite to that described in fig. 1 a.

Preferably, the middle cavity of the rear filter element main body 16 is communicated with the pure water outlet 1132 in the pure water inlet/outlet 113 through a hollow area of the rear upper end cover 151; the bag mouth of the water-driving tank water bag 142 is communicated with the pure water inlet 1131 of the pure water inlet 113 through the cavity between the water-driving tank 14 and the rear filter element main body 16, so that pure water flowing out of the water-driving tank 14 is filtered by the rear filter element main body 16, and the water quality of a user can be ensured even if the water in the water-driving tank is stored for a long time.

In a possible embodiment, fig. 3 is a schematic structural diagram of two front-back composite filter elements according to an exemplary embodiment, wherein the rear filter element shown in a in fig. 3 is located above the water-driving water tank 142, and the rear filter element shown in B in fig. 3 can also be located in the water-driving water tank 142. As shown in fig. 3 a and B, the rear cartridge housing 15 further includes a center tube 153; correspondingly, the middle cavity of the rear filter element main body 16 is communicated with one interface of the pure water inlet and outlet 113 through the hollow area of the rear upper end cover 151, and comprises: the central tube 153 is located in the middle cavity of the rear filter element body 16, and passes through the hollow area of the rear upper end cap 151 and the rear lower end cap 152 to communicate the water-driving tank water bag 142 with one of the pure water inlets and outlets 113, such as the pure water inlet 1131 shown in fig. 3; the other interface, in which the bag mouth of the water-drive tank water bag 142 is communicated with the pure water inlet/outlet 113 through the cavity between the water-drive tank 14 and the rear filter element main body 16, comprises: the bag mouth of the water-driving tank water bag 142 is communicated with the rear filter element main body 16 through the cavity between the water-driving tank 14 and the rear filter element main body 16, and the cavity between the rear filter element main body 16 and the central tube 153 is communicated with the other interface of the pure water inlet/outlet 113, such as a pure water outlet 1132 shown in fig. 3.

Thus, pure water produced by the reverse osmosis filter element can enter the front and rear composite filter elements through the pure water inlet 1131 and enter the water-driving tank water bag 142 from the central tube 153 to store water; the water-driving tank water bag 142 is discharged from the bag opening to the cavity between the water-driving tank 14 and the rear filter element when discharging water, enters the rear filter element main body 16 from the cavity, is filtered by the rear filter element main body 16, passes through the cavity between the rear filter element main body 16 and the central tube 153, and is discharged from the pure water outlet 1132, so as to be used for backflow pure water bubble membrane or user use. Therefore, pure water discharged from the water-driving water tank 142 is filtered by the post-filter element main body, and the water quality is improved.

It should be noted that, in this embodiment, the central tube 153 may also be located in the middle cavity of the rear filter element main body 16, and pass through the hollow area of the rear upper end cap 151 and the rear lower end cap 152 to communicate the water-driving tank water bag 142 and the pure water outlet of the pure water inlet 113; the bag mouth of the water-drive tank water bag 142 is communicated with the rear filter element main body 16 through a cavity between the water-drive tank 14 and the rear filter element main body 16, and the cavity between the rear filter element main body 16 and the central tube 153 is communicated with the water inlet of another pure water outlet 1132 in the pure water inlet/outlet 113. Referring to fig. 3, the flow of pure water is opposite to that described in fig. 1a, the flow of pure water flowing out from the central tube 153 directly flows to the pure water outlet, and the water flowing in needs to pass through the post-filter body 16 before entering the water drive tank 142.

In one possible embodiment, as shown in fig. 1a to 3, the pure water inlet and outlet 113, the tap water inlet 111 and the pure water outlet 112 are located at the top of the composite filter cartridge housing 11. So, convenience of customers installs this front-back composite filter element.

In a possible embodiment, fig. 4 is a schematic structural diagram of three front-back composite filter elements according to an exemplary embodiment, wherein the pure water inlet/outlet 113 shown in a of fig. 4 includes two interfaces, namely a pure water inlet 1131 and a pure water outlet 1132, the pure water inlet/outlet 113 shown in B of fig. 4 includes one interface for the inlet and outlet of pure water, the rear filter element main body 16 shown in C of fig. 4 is provided with a central tube 153, the tap water inlet 111 is located at one end of the composite filter element housing 11, and the pure water outlet 112 and the pure water inlet/outlet 113 are located at the opposite ends of the tap water inlet 111.

In a possible embodiment, fig. 5 is a schematic structural diagram of three front-back composite filter elements according to an exemplary embodiment, wherein the pure water inlet/outlet 113 shown in a of fig. 5 includes two connectors, the pure water inlet/outlet 113 shown in B of fig. 5 includes one connector, a central tube 153 is disposed in the rear filter element main body 16 shown in C of fig. 5, the purified water outlet 112 is located at one end of the composite filter element housing 11, and the tap water inlet 111 and the pure water inlet/outlet 113 are located at opposite ends of the purified water outlet 112; an opening 1221 is arranged on the front lower end cover 122, and the opening 1221 is communicated with the purified water outlet 112.

At this time, in order to reasonably utilize the space in the front and rear composite filter elements and make the distribution of each structure in the front and rear composite filter elements more reasonable, the pure water inlet/outlet 113 is located at one end of the side where the front upper end cap 121 is located and is communicated with the hollow part of the inner ring of the front upper end cap 121, at this time, the purified water outlet 112 is located at one end of the side where the front lower end cap 122 is located, an opening 1221 may be provided on the front lower end cap 122, and the opening 1221 is directly communicated with the purified water outlet 112.

In a possible embodiment, fig. 6 is a schematic structural diagram of three front and rear composite filter elements shown according to an exemplary embodiment, where the pure water inlet/outlet 113 shown in fig. a in fig. 6 includes two connectors, the pure water inlet/outlet 113 shown in fig. B in fig. 6 includes one connector, a central tube 153 is disposed in the rear filter element main body 16 shown in fig. 6C, the pure water inlet/outlet 113 is located at one end of the composite filter element housing 11, the tap water inlet 111 and the purified water outlet 112 are located at opposite ends of the pure water inlet/outlet 113, an opening 1221 is disposed on the front lower end cover 122, and the opening 1221 is communicated with the purified water outlet 112.

At this time, in order to reasonably utilize the space in the front and rear composite filter elements and make the distribution of each structure in the front and rear composite filter elements more reasonable, the pure water inlet/outlet 113 is located at one end of the side where the front upper end cap 121 is located and is communicated with the hollow part of the inner ring of the front upper end cap 121, at this time, the purified water outlet 112 is located at one end of the side where the front lower end cap 122 is located, an opening 1221 may be provided on the front lower end cap 122, and the opening 1221 is directly communicated with the purified water outlet 112.

In one possible embodiment, fig. 7 is a schematic diagram of three front-to-back composite filter elements according to an exemplary embodiment, wherein the rear filter elements in fig. 7 a, B and C are all located in the water-drive tank water bag 142. The difference between fig. 7 and fig. 1b is that in the diagram a, the tap water inlet 111 is located at one end of the composite filter element housing 11, and the purified water outlet 112 and the purified water inlet/outlet 113 are located at the opposite ends of the tap water inlet 111. In the drawing B, the purified water outlet 112 is located at one end of the composite filter element shell 11, and the tap water inlet 111 and the purified water inlet/outlet 113 are located at opposite ends of the purified water outlet 112; an opening 1221 is arranged on the front lower end cover 122, and the opening 1221 is communicated with the purified water outlet 112. In the diagram C, the pure water inlet/outlet 113 is located at one end of the composite filter element housing 11, the tap water inlet 111 and the purified water outlet 112 are located at opposite ends of the pure water inlet/outlet 113, an opening 1221 is arranged on the front lower end cover 122, and the opening 1221 is communicated with the purified water outlet 112.

Fig. 1a to 7 show different positions of various water ports in the front and rear composite filter element, different water ports are connected with different water path pipelines in the water purifier, and various front and rear composite filter elements in fig. 1a to 7 can be used according to various designs inside the water purifier, so that the water path channel in the water purifier is shorter, and the volume of the water purifier is smaller.

In one possible embodiment, the water-driving water-containing bag 142 includes an elastic water bag or a foldable non-elastic water bag, the elastic material of the elastic water bag may be rubber, silica gel, or other elastic polymer material, and further, the water stored in the water-driving water-containing bag 142 is not only used for soaking in the concentrated water side of the RO membrane, but also used for drinking, so that it can be made of food-grade elastic material. The material of the non-elastic water bag may be PE (polyethylene) or the like.

In one possible embodiment, a retainer plate 1411 is provided on the water-driving can end 141 as shown in fig. 2 a, and the retainer plate 1411 is located below the rear lower end 152 for inhibiting the rear lower end 152 from moving downward, so that when pure water enters the rear cartridge body 16, the rear lower end 152 does not fall down due to the action of the water.

It should be noted that, when the rear filter cartridge housing includes a central tube 153, as shown in fig. 3B, the central tube 153 may connect the rear upper end cap 151 and the rear lower end cap 152, so as to fix the rear lower end cap; alternatively, a stop plate may be provided on the center tube 153 to prohibit the lower rear cover 152 from moving downward.

In one possible embodiment, as shown in fig. 3 or 4, the front-to-back composite filter element further comprises: the filter element rotating handle is located on the outer wall of the composite filter element shell 11, for example, the front and rear composite filter elements shown in fig. 1a to 3 can be arranged on the outer wall of the bottom of the composite filter element shell 11, and a user can hold the filter element rotating handle to install or dismantle the front and rear composite filter elements, so that the user can install or dismantle the front and rear composite filter elements conveniently.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited only by the attached claims.

Claims (11)

1. The utility model provides a leading and trailing composite filter element which characterized in that includes:

the composite filter element shell is provided with a tap water inlet, a purified water outlet and a purified water inlet and outlet;

the front filter element comprises a front filter element shell and a front filter element main body, wherein the front filter element main body is fixed in the composite filter element shell and comprises a front upper end cover, a front lower end cover and a flow guide shell, the front upper end cover is a hollow annular cover body, the front lower end cover is a plate-type cover body, the flow guide shell is a cylindrical shell with a hollow inner part, the lower end of the flow guide shell is connected with the front lower end cover, the front filter element shell forms an outer annular cavity positioned on the outer side of the flow guide shell and an inner cylindrical cavity positioned on the inner side of the flow guide shell, the outer annular cavity is communicated with a tap water inlet, and the flow guide shell is provided with a water passing hole; the preposed filter element main body is an annular cylinder and is positioned in the outer annular cavity;

the water drive tank is positioned in the inner cylindrical cavity and comprises a water drive tank end cover fixedly connected with the composite filter element shell and a water drive tank water bag fixedly connected with the water drive tank end cover, a bag opening of the water drive tank water bag is communicated with the pure water inlet and outlet, and a pure water cavity between the water drive tank and the front filter element shell is communicated with the pure water outlet;

the rear filter element is positioned in the water drive tank and comprises a rear filter element shell and a rear filter element main body; the rear filter element shell comprises a rear upper end cover and a rear lower end cover, the rear upper end cover is a hollow annular cover body and is fixedly connected with the composite filter element shell, and the rear lower end cover is a plate-type cover body; the rear filter element main body is an annular cylinder and is positioned in the rear filter element shell, and a middle cavity of the rear filter element main body is communicated with the pure water inlet and outlet through a hollow area of the rear upper end cover.

2. The tandem composite cartridge according to claim 1,

the post-positioned filter element is positioned in the water-drive tank water bag, or the post-positioned filter element is positioned above the water-drive tank water bag.

3. The tandem composite cartridge according to claim 2 wherein said pure water inlet and outlet includes a port;

correspondingly, the sack intercommunication of water drive jar water bag the pure water is imported and exported, includes: the bag mouth of the water-drive tank water bag is communicated with the pure water inlet and outlet through the rear filter element main body.

4. The front-rear composite filter element according to claim 2, wherein the pure water inlet and outlet comprises two connectors, namely a pure water inlet and a pure water outlet;

correspondingly, the middle cavity of the rear filter element main body is communicated with the pure water inlet and outlet through the hollow area of the rear upper end cover, and the pure water inlet and outlet comprise: the middle cavity of the rear filter element main body is communicated with one interface of the pure water inlet and outlet through the hollow area of the rear upper end cover;

the sack intercommunication of water drive jar water bag pure water import and export includes: the bag mouth of the water-drive tank water bag is communicated with the other interface of the pure water inlet and outlet through a cavity between the water-drive tank and the rear filter element main body.

5. The tandem composite cartridge according to claim 4 wherein the tandem cartridge housing further comprises a central tube;

correspondingly, the middle cavity of the rear filter element main body is communicated with one interface of the pure water inlet and outlet through the hollow area of the rear upper end cover, and the interface comprises: the central pipeline is positioned in a middle cavity of the rear filter element main body, passes through a hollow area of the rear upper end cover and the rear lower end cover and is communicated with the water-drive tank water bag and one interface of the pure water inlet and outlet;

the sack of water-drive jar water bag passes through water-drive jar with cavity intercommunication between the rearmounted filter core main part another interface in the pure water import and export includes: the bag mouth of the water-drive tank water bag is communicated with the rear filter element main body through a cavity between the water-drive tank and the rear filter element main body, and the cavity between the rear filter element main body and the central pipeline is communicated with the other interface of the pure water inlet and outlet.

6. The front-rear composite filter element according to any one of claims 1 to 5, wherein the pure water inlet and outlet, the tap water inlet and the pure water outlet are positioned at the top of the composite filter element shell.

7. The front-rear composite filter element according to any one of claims 1 to 5, wherein the tap water inlet is positioned at one end of the composite filter element shell, and the purified water outlet and the purified water inlet and outlet are positioned at opposite ends of the tap water inlet.

8. The front-rear composite filter element according to any one of claims 1 to 5, wherein the purified water outlet is positioned at one end of the composite filter element shell, and the tap water inlet and the purified water inlet and outlet are positioned at opposite ends of the purified water outlet; an opening is formed in the lower end cover and communicated with the purified water outlet.

9. The front-rear composite filter element according to any one of claims 1 to 5, wherein the pure water inlet and outlet is located at one end of the composite filter element shell, the tap water inlet and the pure water outlet are located at opposite ends of the pure water inlet and outlet, and the lower end cover is provided with an opening which is communicated with the pure water outlet.

10. The tandem composite cartridge according to any one of claims 1 to 5 wherein the water-driving tank water bag comprises an elastic water bag.

11. The tandem composite cartridge according to any one of claims 1 to 5 wherein a limit stop is provided on the water drive can end, the limit stop being located below the rear bottom end for inhibiting downward movement of the rear bottom end.

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