CN205367921U - Composite filter element , composite filter element subassembly and purifier - Google Patents

Abstract

The utility model discloses a composite filter element, a composite filter element assembly and a water purifier. The composite filter element includes a pretreatment filter element, a mouthfeel filter element and a fine filter element. The filter element is arranged downstream of the mouthfeel filter element, and the pretreatment filter element, the mouthfeel filter element and the fine filter element are connected into one body. According to the composite filter element of the utility model, by connecting the filter elements of all levels into one body, the pipeline connection of the filter elements of each level can be simplified, so that the structure of the composite filter element is compact, thereby reducing the volume of the whole machine, and in fine filtration A taste filter element is added upstream of the filter element to improve the taste of the effluent.

Description

Composite filter element, composite filter element assembly and water purifier

technical field

The utility model relates to the technical field of water purification, in particular to a composite filter element, a composite filter element assembly and a water purifier.

Background technique

In related technologies, the ultrafiltration water purifier has a large water output and a strong continuous water output capability. The pressure-free tank saves space, does not need to be connected to a power source, and does not generate waste water. However, the current ultrafiltration water purifiers have the following problems: (1) there are many stages of filter elements and the service life of the multi-stage filter elements is inconsistent, frequent replacement of the element is required, the pipeline connection is complicated, the overall size is large, and installation and replacement are inconvenient; (2) ) The pure water purified by the ultrafiltration water purifier has a poor taste; (3) Most of them use the membrane shell and the filter element to weld to form the filter element assembly, so that the membrane shell and the filter element cannot be disassembled, and the membrane shell and the filter element can only be discarded as a whole, which is a waste of resources.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the utility model proposes a composite filter element, which has a compact structure and can improve the mouthfeel of the water.

The utility model also proposes a composite filter element assembly with the above composite filter element.

The utility model further proposes a water purifier with the above-mentioned composite filter element assembly.

According to the composite filter element of the first aspect embodiment of the present invention, it includes a pretreatment filter element, a mouthfeel filter element and a fine filter element, the taste filter element is arranged downstream of the pretreatment filter element in the direction of water flow and the fine filter element is arranged at Downstream of the mouthfeel filter element, the pretreatment filter element, the mouthfeel filter element and the fine filter element are connected as one.

According to the composite filter element of the embodiment of the utility model, by connecting the filter elements of all levels into one body, the pipeline connection of the filter elements of each level can be simplified, so that the structure of the composite filter element is compact, so that the volume of the whole machine can be reduced, and in A taste filter is added upstream of the fine filter element to improve the taste of the water.

According to some embodiments of the present utility model, the pretreatment filter element is in the shape of a tube extending in the vertical direction, and the taste filter element and the fine filter element are both arranged inside the pretreatment filter element.

Further, the taste filter element and the fine filter element are arranged up and down, the taste filter element is located above the fine filter element, the upper end of the fine filter element is connected to the taste filter element and the lower end is suitable for outputting pure water.

Optionally, the taste filter element is welded to the fine filter element.

According to some embodiments of the present utility model, the composite filter element further includes: an upper end cover and a lower end cover, the upper end cover and the lower end cover are arranged at intervals along the vertical direction; Tubular, and the upper and lower ends of the partition are connected to the upper end cover and the lower end cover respectively, and water holes are formed on the partition; the pretreatment filter element is arranged on the outside of the partition and covers The water hole, the taste filter element and the fine filter element are arranged on the inner side of the partition.

Further, the mouthfeel filter element includes: a carbon rod, the carbon rod is in the shape of a tube extending up and down; a first cover plate, the first cover plate covers the upper end of the carbon rod, and the first cover The plate is buckled connected with the upper end cover; the second cover plate is connected to the lower end of the carbon rod.

Further, the upper surface of the first cover plate is provided with an upwardly extending installation column, the outer peripheral surface of the installation column is provided with a card slot, and the lower surface of the upper end cover is provided with a The hook that fits the card slot.

According to some embodiments of the present invention, the fine filter element is connected to the second cover plate and communicated with the carbon rod, and a pure water outlet is formed at the lower end of the fine filter element.

Further, the fine filter element includes: an ultrafiltration membrane housing, the ultrafiltration membrane housing is in the shape of a tube extending up and down, the upper end of the ultrafiltration membrane housing is connected to the second cover plate and connected to the The carbon rod is connected, and the pure water outlet is formed at the lower end of the ultrafiltration membrane housing; the ultrafiltration membrane is arranged in the ultrafiltration membrane housing and separates the carbon rod from the ultrafiltration membrane housing. Describe the water outlet.

According to some embodiments of the present utility model, a handle is provided on the upper end cover, and the handle is rotatably connected with the upper end cover.

According to some embodiments of the present utility model, the pretreatment filter element includes a PP cotton filter element layer and a carbon fiber filter element layer stacked in sequence, and the carbon fiber filter element layer is arranged downstream of the PP cotton filter element layer.

Optionally, the composite filter element further includes a pleated PP layer, and the pleated PP layer is arranged upstream of the pretreatment filter element.

The composite filter element assembly according to the embodiment of the second aspect of the present invention includes: a filter bottle, which has a filter element outlet, and the lower end of the filter bottle is formed with a water inlet and a water outlet; a composite filter element, the composite filter element According to the composite filter element according to the above-mentioned first aspect embodiment of the utility model, the composite filter element is arranged in the filter bottle and can be taken out through the filter element outlet, and the fine filter element is connected to the water outlet; the filter bottle A cap assembly, the filter bottle cap assembly is detachably connected with the filter bottle for opening or closing the filter element outlet.

According to the composite filter element assembly of the embodiment of the present invention, through the cooperation of the filter bottle and the filter bottle cap assembly, the composite filter element can be directly put into the filter bottle for use and the composite filter element can be taken out from the filter bottle, thereby making the composite filter element It is more convenient to install and replace. At the same time, because the composite filter element can be taken out and put into the filter bottle, the filter bottle can be reused and resources can be saved.

Further, the filter bottle cap assembly includes: a filter bottle cap, the filter bottle cap is arranged on the end face of the filter element outlet of the filter bottle and compresses the composite filter element; a pressure ring, the pressure ring and The peripheral wall of the filter core outlet is threaded and pressed against the filter bottle cap.

Further, a handle is provided on the filter bottle cap.

The water purifier according to the embodiment of the third aspect of the utility model includes the composite filter element assembly according to the embodiment of the second aspect of the utility model.

According to the water purifier of the embodiment of the present utility model, the structure of the water purifier can be simplified, the pipeline connections can be reduced, the size of the whole machine can be reduced, and the taste of the water can be improved by arranging the above-mentioned composite filter element assembly. It also makes it easy to change cores.

Description of drawings

Fig. 1 is a schematic diagram of changing the core of a composite filter element assembly according to an embodiment of the present invention, wherein the pressure ring is removed from the composite filter element assembly;

Fig. 2 is a schematic diagram of changing the core of the composite filter element assembly according to the embodiment of the present invention, wherein the filter bottle cap is removed from the composite filter element assembly;

Fig. 3 is a schematic diagram of changing the core of the composite filter element assembly according to the embodiment of the present invention, wherein the composite filter element is taken out from the filter bottle;

Fig. 4 is a schematic diagram of a composite filter element according to an embodiment of the present invention;

Fig. 5 is a sectional view of the composite filter element in Fig. 4 along its central axis;

Fig. 6 is a schematic diagram of a folded PP layer of a composite filter element according to an embodiment of the present invention;

Fig. 7 is a schematic diagram of a composite filter element according to another embodiment of the present invention.

Reference signs:

Composite filter element assembly 100,

Composite filter element 1, pretreatment filter element 11, PP cotton filter element layer 111, carbon fiber filter element layer 112, taste filter element 12, carbon rod 121, first cover plate 122, mounting column 1221, card slot 1222, second cover plate 123, fine filtration Filter element 13, ultrafiltration membrane housing 131, ultrafiltration membrane 132, pure water outlet 133, upper end cover 14, hook 141, handle 142, lower end cover 15, partition 16, water hole 161, folded PP layer 17, sealing Circle 18,

Filter bottle 2, filter cartridge outlet 21, water inlet 22, water outlet 23,

Filter bottle cap assembly 3 , filter bottle cap 31 , handle 311 , pressure ring 32 .

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "central", "upper", "lower", "top", "bottom", "inner", "outer", "axial", "circumferential" The orientation or positional relationship indicated by ", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components , unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

The composite filter element 1 according to the embodiment of the present utility model will be described in detail below with reference to FIGS. 1-7 .

As shown in FIGS. 4-7 , the composite filter element 1 according to the embodiment of the first aspect of the present invention includes a pretreatment filter element 11 , a taste filter element 12 and a fine filter element 13 .

Specifically, with reference to Fig. 5 (the direction of the arrow in the figure is the water flow direction), the mouthfeel filter element 12 is arranged on the downstream of the pretreatment filter element 11 and the fine filter element 13 is arranged on the downstream of the mouthfeel filter element 12 in the water flow direction. Thus, when the water flow enters the composite filter element 1, it is initially filtered through the pretreatment filter element 11, and then filtered through the mouthfeel filter element 12 to improve the mouthfeel of the water. The water filtered by the composite filter element 1 can not only meet the general drinking water requirements but also improve the taste of the water and avoid the growth of bacteria.

Moreover, by connecting the pretreatment filter element 11, the taste filter element 12 and the fine filter element 13 into one, the multi-stage filter elements can be combined into a whole. As a result, the pipeline connection of the filter elements of each stage can be simplified, so that the composite filter element 1 has a compact structure, thereby reducing the volume of the whole machine.

According to the composite filter element 1 of the embodiment of the utility model, by connecting the filter elements of all levels into one body, the pipeline connection of the filter elements of each level can be simplified, so that the structure of the composite filter element 1 is compact, thereby reducing the volume of the whole machine. And the mouthfeel filter element 12 is added upstream of the fine filter element 13, which can improve the mouthfeel of the water outlet.

According to some embodiments of the present invention, as shown in FIG. 5 , the pretreatment filter element 11 is in the shape of a tube extending up and down, and the taste filter element 12 and the fine filter element 13 are both arranged inside the pretreatment filter element 11 . Thus, the pretreatment filter element 11 can have a larger filtration area, and at the same time, the structure of the composite filter element 1 can be made simpler and more compact.

Further, as shown in Figure 5, the mouthfeel filter element 12 and the fine filter element 13 are arranged up and down, the taste filter element 12 is positioned above the fine filter element 13, the upper end of the fine filter element 13 is connected to the mouthfeel filter element 12 and the lower end is suitable for outputting pure water. Thus, the water stream initially filtered by the pretreatment filter element 11 first flows into the taste filter element 12, then flows downward into the fine filter element 13 for fine filtration, and finally the water flows out from the lower end of the fine filter element 13 to form pure water.

Optionally, the mouthfeel filter element 12 and the fine filter element 13 are welded, for example, the mouthfeel filter element 12 and the fine filter element 13 can be ultrasonically welded, so that the mouthfeel filter element 12 and the fine filter element 13 can be connected and fixed together. Of course, the taste filter element 12 and the fine filter element 13 can also be connected in other ways.

According to some embodiments of the present utility model, as shown in Fig. 4, Fig. 5 and Fig. 7, composite filter core 1 also comprises upper end cover 14, lower end cover 15 and separator 16, the upper end cover 14 of composite filter core 1 and lower end cover 15 along Arranged at intervals in the up and down direction. The partition 16 is in the shape of a tube extending up and down, and the upper and lower ends of the partition 16 are connected to the upper end cover 14 and the lower end cover 15 respectively, and a water hole 161 is formed on the partition 16, and the pretreatment filter element 11 is arranged on the partition 16 and cover the water hole 161, the taste filter element 12 and the fine filter element 13 are arranged on the inner side of the dividing plate 16. Thus, the water flow passes through the water hole 161 on the partition 16 after being preliminarily filtered by the pretreatment filter element 11 , and then flows through the taste filter element 12 and the fine filter element 13 in sequence. The partition 16 can separate the pretreatment filter core 11 from the taste filter core 12 and the fine filter core 13, and the partition 16 can also play a role in supporting the pretreatment filter core 11, and the pretreatment filter core 11 can be along the outer peripheral surface of the partition plate 16 Wound around the separator 16.

The upper end cover 14 and the lower end cover 15 of the composite filter element 1 are respectively connected through the separator 16, so that the filter elements of all levels in the composite filter element 1 can be integrated between the upper end cover 14 and the lower end cover 15, so that the filter elements of all levels are combined into a whole , and can make the overall structure of the composite filter element 1 compact and stable.

Further, as shown in FIG. 5 , the taste filter element 12 includes a carbon rod 121 , a first cover plate 122 and a second cover plate 123 . The carbon rod 121 is in the shape of a tube extending vertically. The first cover 122 covers the upper end of the carbon rod 121 , and the second cover 123 is connected to the lower end of the carbon rod 121 . Thus, the water flowing into the taste filter element 12 flows downward along the center of the carbon rod 121 after being filtered by the carbon rod 121 . Moreover, through the setting of the first cover plate 122 and the second cover plate 123, it is possible to prevent part of the water flow from directly entering the center of the carbon rod 121 from the upper end of the carbon rod 121 without being filtered by the carbon rod 121, so as to ensure that it flows through the taste filter element. 12 water quality.

The first cover plate 122 of the mouthfeel filter element 12 is snap-connected with the upper end cover 14 of the composite filter element 1 , so that the mouthfeel filter element 12 and the first cover plate 122 can be connected as a whole. For example, in the example shown in FIG. 5 , the upper surface of the first cover plate 122 is provided with an upwardly extending mounting post 1221 , the outer peripheral surface of the mounting post 1221 is provided with a card slot 1222 , and the lower surface of the upper end cover 14 is provided with an upwardly extending mounting post 1221 . The hook 141 that engages with the slot 1222 extends downward. Thus, when the upper end cover 14 is connected to the taste filter element 12 , the hook 141 on the upper end cover 14 can be engaged with the locking groove 1222 of the taste filter element 12 .

Of course, it is also possible that the upper end cover 14 is formed with a slot, and the first cover 122 is formed with a hook that engages with the slot.

According to some embodiments of the present invention, as shown in FIG. 5 , the fine filter element 13 is connected to the second cover plate 123 and communicated with the carbon rod 121 , and a pure water outlet 133 is formed at the lower end of the fine filter element 13 . Thus, after the water flowing into the taste filter element 12 is filtered by the carbon rod 121, the water flow flows down the center of the carbon rod 121 and flows into the fine filter element 13 for fine filtration, and the finely filtered water flows out from the pure water outlet 133.

Further, as shown in FIG. 5 , the fine filter element 13 includes an ultrafiltration membrane housing 131 and an ultrafiltration membrane 132 . The ultrafiltration membrane housing 131 is tubular extending in the up-down direction, the upper end of the ultrafiltration membrane housing 131 is connected to the second cover plate 123 and communicated with the carbon rod 121, and the pure water outlet 133 is formed at the lower end of the ultrafiltration membrane housing 131 , the ultrafiltration membrane 132 is arranged in the ultrafiltration membrane casing 131 and separates the carbon rod 121 and the water outlet 23 . Thus, the ultrafiltration membrane housing 131 can isolate the ultrafiltration membrane 132 from the pretreatment filter element 11, that is to say, the ultrafiltration membrane housing 131 can prevent part of the water flow filtered by the pretreatment filter element 11 from directly entering the ultrafiltration membrane. 132 will affect the water quality of the effluent. Due to the isolation effect of the ultrafiltration membrane housing 131, the water filtered by the pretreatment filter element 11 flows upwards and flows into the taste filter element 12, and the water filtered by the taste filter element 12 flows downwards and flows into the fine filter element 13, and flows into the fine filter element 13 water flows out from the pure water outlet 133 after being finely filtered by the ultrafiltration membrane 132.

In some embodiments of the present invention, as shown in FIG. 4 , FIG. 5 and FIG. 7 , a handle 142 is provided on the upper end cover 14 of the composite filter element 1 , and the handle 142 is rotatably connected with the upper end cover 14 . Thus, the handle 142 can facilitate the installation and replacement of the composite filter element 1 . In addition, the handle 142 can be rotated to fit the upper end cover 14, so that the structure of the composite filter element 1 can be made compact and the space occupied by the composite filter element 1 can be reduced.

In some specific embodiments of the present utility model, as shown in Figure 5, the pretreatment filter element 11 comprises a PP cotton filter element layer 111 and a carbon fiber filter element layer 112 stacked in sequence, and the carbon fiber filter element layer 112 is located at the downstream of the PP cotton filter element layer 111 . Thus, the water flowing into the pretreatment filter element 11 is first filtered through the PP cotton filter element layer 111, and then filtered through the carbon fiber filter element layer 112, thereby ensuring the water quality of the effluent. In addition, the carbon fiber filter element layer 112 can be wound on the PP cotton filter element layer 111 , so that the pretreatment filter element 11 can be made more compact while ensuring the water quality, and thus the composite filter element 1 can be further compacted in structure.

Optionally, as shown in FIG. 5 and FIG. 6 , the composite filter core 1 further includes a folded PP layer 17 , and the folded PP layer 17 can be arranged upstream of the pretreatment filter core 11 . The membrane of the folded PP layer 17 has a large filtration area and strong dirt-holding capacity, so that not only impurities in the water can be filtered, but also the pretreatment filter element 11 and the fine filter element 13 can be protected to a certain extent, prolonging the life of the pretreatment filter element 11 .

Here, it should be noted that the folded PP layer 17 can be selected and replaced separately, and can be selectively installed according to water quality, and the specific parameters of the folded PP layer 17 can also be selected according to different water quality adaptability.

In addition, the composite filter element 1 can also include a plurality of sealing rings 18, and the combined use of the plurality of sealing rings 18 can ensure that the composite filter element 1 has good sealing performance, thereby preventing the water in the composite filter element 1 from leaking out, and at the same time preventing The water passing through different filter layers in the composite filter element 1 is mixed, so that the quality of the effluent water can be guaranteed.

As shown in FIGS. 1-4 , the composite filter element assembly 100 according to the second embodiment of the present invention includes a filter bottle 2 , a composite filter element 1 and a filter bottle cap assembly 3 .

Specifically, the composite filter element 1 is the composite filter element 1 according to the above-mentioned first aspect embodiment of the utility model, the filter bottle 2 has a filter element take-out port 21, and the composite filter element 1 is located in the filter bottle 2 and can be taken out by the filter element take-out port 21 , thereby facilitating the installation and replacement of the composite filter element 1. A water inlet 22 and a water outlet 23 are formed at the lower end of the filter bottle 2 , and the fine filter element 13 in the composite filter element 1 is connected to the water outlet 23 . Thus, water can enter the filter bottle 2 from the water inlet 22 , and after being successively filtered by the pretreatment filter element 11 , the taste filter element 12 and the fine filter element 13 in the composite filter element 1 , it can flow out from the water outlet 23 .

In a specific embodiment of the present utility model, referring to Fig. 3 and Fig. 5, the lower end of the fine filter element 13 is formed with a pure water outlet 133, when the composite filter element 1 is installed in the filter bottle 2, the pure water of the fine filter element 13 The water outlet 133 can be connected with the water outlet 23 on the filter bottle 2 . Thus, the water filtered by the composite filter element 1 can flow out through the pure water outlet 133 and the water outlet 23 on the filter bottle 2 in sequence.

The filter bottle cap assembly 3 is detachably connected with the filter bottle 2 to open or close the filter element outlet 21. The filter bottle cap assembly 3 can be used to position and compress the composite filter element 1. At the same time, the filter bottle cap assembly 3 can also effectively prevent impurities from Such as the entry of dust, etc., to ensure the quality of clean water. When it is necessary to install or replace the composite filter element 1, open the filter bottle cap assembly 3 and take out the composite filter element 1 to be replaced from the filter bottle 2, then put the new composite filter element 1 into the filter bottle 2, and finally use the filter bottle cap The component 3 closes the filter element removal port 21 . Thereby, the operation of replacing the core can be made convenient and easy, and the filter bottle 2 can be reused to save resources.

According to the composite filter element assembly 100 of the embodiment of the utility model, through the cooperation of the filter bottle 2 and the filter bottle cap assembly 3, the composite filter element 1 can be put into the filter bottle 2 for use and the composite filter element 1 can be taken out from the filter bottle 2, This makes the installation and replacement of the composite filter element 1 more convenient, and at the same time, because the composite filter element 1 can be taken out and put into the filter bottle 2, the filter bottle 2 can be reused to save resources.

Further, as shown in FIGS. 1 and 2 , the filter bottle cap assembly 3 includes a filter bottle cap 31 and a pressure ring 32 . The filter bottle cap 31 is located on the end face of the filter cartridge outlet 21 of the filter bottle 2 and compresses the composite filter element 1 , and the pressure ring 32 is threadedly connected with the peripheral wall of the filter cartridge outlet 21 and compresses the filter bottle cap 31 . Thereby, the composite filter element 1 can be ensured to be reliably sealed and conveniently assembled and disassembled. A handle 311 can also be provided on the filter bottle cap 31 , so that the filter bottle cap 31 can be removed from the filter cartridge outlet 21 of the filter bottle 2 .

In addition, the pressure ring 32 and the filter bottle 2 can also be connected by buckling.

The water purifier according to the embodiment of the third aspect of the utility model includes the composite filter element assembly 100 according to the embodiment of the second aspect of the utility model.

According to the water purifier of the embodiment of the present utility model, the structure of the water purifier can be simplified, the pipeline connections can be reduced, the size of the whole machine can be reduced, and the taste of the water can be improved by setting the above-mentioned composite filter element assembly 100 . It also makes it easy to change cores.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (16)

1. a composite filter element, it is characterized in that, including preprocessing filter element, mouthfeel filter element and fine filtering filter element, in water (flow) direction, described mouthfeel filter element is located at the downstream of described preprocessing filter element and described fine filtering filter element is located at the downstream of described mouthfeel filter element, and described preprocessing filter element, described mouthfeel filter element are connected with described fine filtering filter element in one.

2. composite filter element according to claim 1, it is characterised in that described preprocessing filter element is vertically extending tubulose, described mouthfeel filter element and described fine filtering filter element are each provided at the inner side of described preprocessing filter element.

3. composite filter element according to claim 2, it is characterized in that, described mouthfeel filter element and described fine filtering filter element are vertically arranged, described mouthfeel filter element is positioned at above described fine filtering filter element, and the upper end of described fine filtering filter element connects described mouthfeel filter element and lower end is suitable to output pure water.

4. composite filter element according to claim 3, it is characterised in that described mouthfeel filter element welds with described fine filtering filter element.

5. composite filter element according to claim 2, it is characterised in that described composite filter element also includes:

Upper end cover and bottom end cover, described upper end cover and described bottom end cover interval along the vertical direction are arranged；

Dividing plate, described dividing plate is vertically extending tubulose, and the two ends up and down of described dividing plate are connected with described upper end cover and described bottom end cover respectively, and described dividing plate is formed with water hole；

Described preprocessing filter element is located at the outside of described dividing plate and covers described water hole, and described mouthfeel filter element and described fine filtering filter element are located at the inner side of described dividing plate.

6. composite filter element according to claim 5, it is characterised in that described mouthfeel filter element includes:

Carbon-point, described carbon-point is vertically extending tubulose；

First cover plate, described first cover plate covers the upper end of described carbon-point, and described first cover plate snaps connection with described upper end cover；

Second cover plate, described second cover plate is connected to the lower end of described carbon-point.

7. composite filter element according to claim 6, it is characterized in that, the upper surface of described first cover plate is provided with upwardly extending mounting post, and the outer peripheral face of described mounting post is provided with draw-in groove, and the lower surface of described upper end cover is provided with and downwardly extends the snap fit engaged with described draw-in groove.

8. composite filter element according to claim 6, it is characterised in that described fine filtering filter element is connected with described second cover plate and connects with described carbon-point, the lower end of described fine filtering filter element is formed with pure water outlet.

9. composite filter element according to claim 8, it is characterised in that described fine filtering filter element includes:

Ultrafilter membrane housing, described ultrafilter membrane housing is vertically extending tubulose, and the upper end of described ultrafilter membrane housing is connected with described second cover plate and connects with described carbon-point, and described pure water goes out the interruption-forming lower end at described ultrafilter membrane housing；

Ultrafilter membrane, described ultrafilter membrane is located in described ultrafilter membrane housing and separates described carbon-point and described outlet.

10. composite filter element according to claim 5, it is characterised in that described upper end cover is provided with handle, and described handle is connected with described upper end cover rotationally.

11. the composite filter element according to any one of claim 1-10, it is characterised in that described preprocessing filter element includes the PP cotton filter element layer and the carbon fiber filter core layer that stack gradually, and described carbon fiber filter core layer is located at the downstream of described PP cotton filter element layer.

12. the composite filter element according to any one of claim 1-10, it is characterised in that also including folding PP layer, described folding PP layer is located at the upstream of described preprocessing filter element.

13. a composite filter element assembly, it is characterised in that including:

Filter flask, described filter flask has filter element conveying end, and the lower end of described filter flask is formed with water inlet and outlet；

Composite filter element, described composite filter element is the composite filter element according to any one of claim 1-12, and described composite filter element is located in described filter flask and can pass through described filter element conveying end and takes out, and described fine filtering filter element is connected with described outlet；

Filter flask cap assemblies, described filter flask cap assemblies and described filter flask are detachably connected for opening or close described filter element conveying end.

14. composite filter element assembly according to claim 13, it is characterised in that described filter flask cap assemblies includes:

Filter flask lid, described filter flask lid lid is located on the end face of the filter element conveying end of described filter flask and compresses described composite filter element；

Pressure ring, described pressure ring is threadeded with the perisporium of described filter element conveying end and compresses described filter flask lid.

15. composite filter element assembly according to claim 14, it is characterised in that described filter flask lid is provided with handle.

16. a water purifier, it is characterised in that include the composite filter element assembly according to any one of claim 13-15.