Filter element structure and water purification equipment

Abstract

The present invention provides a filter element structure and water purification equipment, which relate to the technical field of water purification equipment. The filter element structure includes a housing and multiple filter element assemblies; the multiple filter element assemblies are all arranged in the housing; the housing has a first water inlet channel, and the water inlet sides of at least two of the filter element assemblies are connected to the first water inlet channel. The water inlet sides of at least two of the multiple filter element assemblies can be supplied with water through the first water inlet channel. That is, when the first water inlet channel forms an interface with an external device, water can be supplied to the water inlet sides of at least two filter element assemblies, which can reduce the number of interfaces between the filter element structure and the external device, thereby reducing the number of interfaces of the water purification equipment, thereby reducing the risk of water leakage in the water purification equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and in particular to a filter element structure and water purification equipment. Background Art

[0002] Water purification equipment is widely used in modern society, and the filter element structure is one of the important components of water purification equipment.

[0003] Typically, a water purification device needs to be equipped with filter core layers with multiple functions. However, in the filter core structures in the prior art, each filter core structure is equipped with a filter core layer with one function. Therefore, a water purification device needs to be equipped with multiple filter core structures.

[0004] However, each filter element structure will produce an interface with the water purification equipment, which will result in a large number of interfaces for the water purification equipment and a higher risk of water leakage. Summary of the Invention

[0005] The purpose of the present invention is to provide a filter element structure to solve the technical problem of high risk of water leakage in water purification equipment in the prior art.

[0006] The filter element structure provided by the present invention includes a housing and a plurality of filter element components;

[0007] A plurality of filter element assemblies are arranged in the housing;

[0008] The shell has a first water inlet channel, and the water inlet sides of at least two filter element assemblies are connected to the first water inlet channel.

[0009] Further, the plurality of filter element assemblies include a first filter element assembly and a second filter element assembly;

[0010] The first filter element assembly and the second filter element assembly are sequentially arranged along the axial direction of the housing; the water inlet side of the first filter element assembly and the water inlet side of the second filter element assembly are both spaced apart from the inner wall of the housing to form the first water inlet channel.

[0011] Furthermore, the first filter element assembly includes a first filter element layer and a second filter element layer; the first filter element layer is sleeved on the outside of the second filter element layer, and the first filter element layer is spaced apart from the inner wall of the shell to form the first water inlet channel.

[0012] Furthermore, the first filter element assembly further includes a first cover and a second cover;

[0013] The top of the first filter core layer and the top of the second filter core layer are both fixedly connected to the first cover body, and the bottom of the first filter core layer and the bottom of the second filter core layer are both fixedly connected to the second cover body;

[0014] A first water outlet channel is formed on the top of the first cover body. The first water outlet channel is communicated with the water outlet side of the second filter layer, and the first water outlet channel is penetrated by the shell.

[0015] Furthermore, the first filter core layer is a PP filter core layer, and the second filter core layer is a CTO filter core layer.

[0016] Furthermore, the second filter element assembly includes a third filter element layer, a first bracket and a second bracket;

[0017] The top of the third filter core layer is fixedly connected to the first bracket, the bottom of the third filter core layer is fixedly connected to the second bracket, and the third filter core layer is spaced apart from the inner wall of the housing to form the first water inlet channel;

[0018] The first filter element assembly is arranged on the first bracket; a second water outlet channel is formed on the top of the first bracket, and the second water outlet channel is connected to the water outlet side of the third filter element layer; the second water outlet channel passes through the first filter element assembly, and the second water outlet channel is arranged through the shell.

[0019] Furthermore, the third filter core layer is an ultrafiltration filter core layer.

[0020] Furthermore, the plurality of filter element assemblies further includes a third filter element assembly;

[0021] The third filter element assembly has a second water inlet channel, and the second water inlet channel is arranged to penetrate the shell.

[0022] Furthermore, the first filter element assembly is sleeved on the outside of the third filter element assembly.

[0023] Furthermore, the third filter element assembly includes a fourth filter element layer, a third cover, a fourth cover and a third bracket;

[0024] The top of the fourth filter core layer is fixedly connected to the third cover body, and the bottom of the fourth filter core layer is fixedly connected to the fourth cover body; a third water outlet channel is formed on the top of the third cover body, the third water outlet channel is communicated with the water outlet side of the fourth filter core layer, and the third water outlet channel is arranged to penetrate the housing;

[0025] The fourth filter element layer, the third cover body and the fourth cover body are all arranged in the third bracket, the third bracket has an annular side wall, the third cover body and the fourth filter element layer are spaced apart from the annular side wall and form the second water inlet channel, and the fourth cover body is sealed with the annular side wall.

[0026] Furthermore, the fourth filter element layer is a carbon rod filter element layer.

[0027] Another object of the present invention is to provide a water purification device, including the filter element structure provided by the present invention.

[0028] Furthermore, the water purification equipment also includes a reverse osmosis filtration component;

[0029] The outlet of the second filter element assembly is communicated with the inlet of the reverse osmosis filter assembly, and the outlet of the reverse osmosis filter assembly is communicated with the second water inlet channel.

[0030] The filter element structure provided by the present invention includes a housing and multiple filter element assemblies; the multiple filter element assemblies are disposed within the housing; the housing has a first water inlet channel, and the water inlet sides of at least two of the filter element assemblies are connected to the first water inlet channel. The water inlet sides of at least two of the multiple filter element assemblies can be supplied with water through the first water inlet channel. That is, when the first water inlet channel forms an interface with an external device, water can be supplied to the water inlet sides of at least two filter element assemblies, which can reduce the number of interfaces between the filter element structure and external devices, thereby reducing the number of interfaces of the water purification device, thereby reducing the risk of water leakage in the water purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 is an exploded view of the filter element structure provided by an embodiment of the present invention;

[0033] Figure 2 is a cross-sectional view of a filter element structure provided by an embodiment of the present invention;

[0034] Figure 3 1 is a schematic structural diagram of a first filter element assembly in a filter element structure provided by an embodiment of the present invention;

[0035] Figure 4 1 is a schematic structural diagram of the second filter element assembly in the filter element structure provided by an embodiment of the present invention;

[0036] Figure 5 1 is a schematic structural diagram of the third filter element assembly in the filter element structure provided by an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the structure of the water purification equipment provided by the embodiment of the present invention;

[0038] Figure 7This is a flow chart of the water purification equipment provided by an embodiment of the present invention.

[0039] Icons: 1-first filter element assembly; 11-first cover; 111-first water outlet channel; 12-second cover; 13-PP filter element layer; 14-CTO filter element layer; 2-second filter element assembly; 21-first bracket; 211-second water outlet channel; 22-second bracket; 23-ultrafiltration filter element layer; 3-housing; 4-first water inlet channel; 5-third filter element assembly; 51-second water inlet channel; 52-third cover; 521-third water outlet channel; 53-fourth cover; 54-third bracket; 55-carbon rod filter element layer; 6-reverse osmosis filter assembly; 61-water inlet valve; 62-boosting pump; 63-RO membrane filter element; 64-one-way high-pressure switch; 7-first faucet; 8-second faucet; 9-sealing ring. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] This embodiment provides a filter element structure and a water purification device. Several embodiments are given below to describe the filter element structure and the water purification device provided by the present invention in detail.

[0042] Example 1

[0043] The filter element structure provided in this embodiment is as follows: Figures 1 to 7 As shown, it includes a shell 3 and multiple filter element assemblies; the multiple filter element assemblies are all arranged in the shell 3; a first water inlet channel 4 is provided in the shell 3, and the water inlet sides of at least two filter element assemblies are connected to the first water inlet channel 4.

[0044] The water inlet sides of at least two filter element assemblies among the multiple filter element assemblies can be supplied with water through the first water inlet channel 4, that is, when the first water inlet channel 4 forms an interface with the external equipment, water can be supplied to the water inlet sides of at least two filter element assemblies, which can reduce the number of interfaces between the filter element structure and the external equipment, thereby reducing the number of interfaces of the water purification equipment, thereby reducing the risk of water leakage of the water purification equipment.

[0045] In addition, setting up multiple filter element assemblies can increase the number of filter element assemblies in a filter element structure, and then increase the number of different filter element layers in the filter element structure, thereby increasing the functionality of the filter element structure. The integration of filter element layers with multiple functions in one filter element structure can reduce the replacement cost of the filter element structure, and thus reduce the overall manufacturing cost of the water purification equipment.

[0046] The number of the multiple filter element assemblies can be any suitable number, such as 2, 3, 4, or 5. The filter element structure provided in this embodiment can have the water inlet sides of all of the multiple filter element assemblies connected to the first water inlet channel 4, or the water inlet sides of some of the multiple filter element assemblies can be connected to the first water inlet channel 4. Furthermore, the types of filter core layers in the multiple filter element assemblies can be the same or different.

[0047] Among them, at least two filter element components connected to the first water inlet channel 4 on the water inlet side can be arranged in sequence in the axial direction of the shell 3, or can be arranged in sequence in the radial direction of the shell 3.

[0048] In this embodiment, the multiple filter element assemblies include a first filter element assembly 1 and a second filter element assembly 2; the first filter element assembly 1 and the second filter element assembly 2 are arranged in sequence along the axial direction of the shell 3; the water inlet side of the first filter element assembly 1 and the water inlet side of the second filter element assembly 2 are both spaced apart from the inner wall of the shell 3 and form a first water inlet channel 4.

[0049] The first filter element assembly 1 and the second filter element assembly 2 are arranged in sequence along the axial direction of the housing 3, which can reduce the radial size of the housing 3, reduce the floor space of the housing 3, and reduce the installation space requirement of the water purification equipment.

[0050] The first filter element assembly 1 can be provided with a single filter element layer; or multiple filter element layers can be provided, and the multiple filter element layers can be nested in sequence. When multiple filter element layers are provided in the first filter element assembly 1, the multiple filter element layers can share the first water inlet channel 4 for water intake and the same water outlet channel for water discharge, which can further reduce the number of water inlet and outlet interfaces.

[0051] In addition, multiple filter core layers are provided, and the multiple filter core layers are nested in sequence, which can reduce the overall volume of the filter core structure and reduce the installation space requirements of the entire water purification equipment.

[0052] In this embodiment, the first filter element assembly 1 includes a first filter element layer and a second filter element layer; the first filter element layer is sleeved on the outside of the second filter element layer, and the first filter element layer is spaced apart from the inner wall of the shell 3 to form a first water inlet channel 4.

[0053] Specifically, the raw water entering through the first water inlet channel 4 flows into the water inlet side of the first filter element layer, flows out from the water outlet side of the first filter element layer to the water inlet side of the second filter element layer after being filtered by the first filter element layer, and flows out from the water outlet side of the second filter element layer after being filtered by the second filter element layer.

[0054] Furthermore, the first filter element assembly 1 also includes a first cover body 11 and a second cover body 12; the top of the first filter element layer and the top of the second filter element layer are both fixedly connected to the first cover body 11, and the bottom of the first filter element layer and the bottom of the second filter element layer are both fixedly connected to the second cover body 12; a first water outlet channel 111 is formed on the top of the first cover body 11, and the first water outlet channel 111 is connected to the water outlet side of the second filter element layer, and the first water outlet channel 111 is penetrated by the shell 3.

[0055] The fixed connection method may be bonding, ultrasonic welding or any other suitable method.

[0056] The first water outlet channel 111 protrudes from the top of the first cover body 11 , and the water flowing out of the water outlet side of the second filter element layer can flow out of the housing 3 through the first water outlet channel 111 .

[0057] Among them, the first filter core layer can be any suitable form such as PP filter core layer 13, CTO filter core layer 14 or ultrafiltration filter core layer 23, and the second filter core layer can be any suitable form such as PP filter core layer 13, CTO filter core layer 14 or ultrafiltration filter core layer 23.

[0058] In this embodiment, the first filter core layer is a PP filter core layer 13 , and the second filter core layer is a CTO filter core layer 14 .

[0059] PP filter element (also known as melt-blown filter element) is a filter material made of non-toxic and odorless polypropylene as raw material, which is heated, melted, sprayed, pulled, and received into shape. The PP filter element can be any suitable form such as melt-blown PP filter element, wound PP filter element or folded PP filter element.

[0060] The CTO filter element is a carbon rod filter element. The CTO filter element can be in any suitable form, such as a compressed carbon rod filter element, an extruded carbon rod filter element or a sintered carbon rod filter element.

[0061] When the first filter core layer is the PP filter core layer 13 and the second filter core layer is the CTO filter core layer 14 , the raw water can provide a pretreatment function for the reverse osmosis filter component 6 after being filtered by the first filter core component 1 .

[0062] Furthermore, the second filter element assembly 2 includes a third filter element layer, a first bracket 21 and a second bracket 22; the top of the third filter element layer is fixedly connected to the first bracket 21, the bottom of the third filter element layer is fixedly connected to the second bracket 22, and the third filter element layer is spaced apart from the inner wall of the shell 3 to form a first water inlet channel 4; the first filter element assembly 1 is arranged on the first bracket 21; a second water outlet channel 211 is formed on the top of the first bracket 21, and the second water outlet channel 211 is connected to the water outlet side of the third filter element layer; the second water outlet channel 211 passes through the first filter element assembly 1, and the second water outlet channel 211 is arranged through the shell 3.

[0063] The fixed connection may be in the form of ultrasonic welding, or in any other suitable form such as bonding. The first bracket 21 and the second bracket 22 can provide support for the third filter element layer.

[0064] The first filter element assembly 1 is mounted on a first bracket 21, which also supports the first filter element assembly 1. A second water outlet channel 211 protrudes from the top of the second cover 12. Water flowing out of the outlet side of the third filter element layer can flow out of the housing 3 through the second water outlet channel 211. Specifically, raw water entering through the first water inlet channel 4 flows into the inlet side of the third filter element layer, is filtered by the third filter element layer, and then flows out of the housing 3 through the outlet side of the third filter element layer to the second water outlet channel 211.

[0065] The third filter core layer can be any suitable form such as a PP filter core layer 13 , a CTO filter core layer 14 or an ultrafiltration filter core layer 23 .

[0066] In this embodiment, the third filter element layer is an ultrafiltration filter element layer 23. After the raw water is filtered through the ultrafiltration filter element layer 23, ultrafiltration purified water can be generated, so that the second filter element assembly 2 can provide users with a large flow of ultrafiltration purified water.

[0067] When the ultrafiltration filter core layer 23 is filled with polyurethane glue, the first bracket 21 and the second bracket 22 can provide support for the ultrafiltration filter core layer 23 .

[0068] Furthermore, the plurality of filter element assemblies further include a third filter element assembly 5 ; the third filter element assembly 5 has a second water inlet channel 51 , and the second water inlet channel 51 is arranged to penetrate the housing 3 .

[0069] The third filter element assembly 5 is provided to increase the number of filter element assemblies, thereby increasing the number of different filter element layers in the filter element structure, increasing the functionality of the filter element structure, thereby reducing the replacement cost of the filter element structure, and further reducing the overall manufacturing cost of the water purification equipment.

[0070] The filter element assembly further includes a third water outlet channel 521 . Water flows into the third filter element assembly 5 through the second water inlet channel 51 , and after being filtered by the third filter element assembly 5 , flows out of the housing 3 through the third water outlet channel 521 .

[0071] Among them, the third filter element assembly 5 can be set at any suitable position in the shell 3. For example, the first filter element assembly 1, the second filter element assembly 2 and the third filter element assembly 5 can be set in sequence along the axial direction of the shell 3, and the first filter element assembly 1, the second filter element assembly 2 and the third filter element assembly 5 can also be set in sequence along the radial direction of the shell 3.

[0072] In this embodiment, the first filter element assembly 1 is sleeved on the outside of the third filter element assembly 5. This arrangement allows the third filter element assembly 5 to be installed in the space inside the first filter element assembly 1, thereby reducing the overall volume of the filter element structure and reducing the installation space requirement of the water purification equipment.

[0073] Furthermore, the third filter element assembly 5 includes a fourth filter element layer, a third cover body 52, a fourth cover body 53 and a third bracket 54; the top of the fourth filter element layer is fixedly connected to the third cover body 52, and the bottom of the fourth filter element layer is fixedly connected to the fourth cover body 53; a third water outlet channel 521 is formed on the top of the third cover body 52, and the third water outlet channel 521 is connected to the water outlet side of the fourth filter element layer, and the third water outlet channel 521 is penetrated by the shell 3; the fourth filter element layer, the third cover body 52 and the fourth cover body 53 are all arranged in the third bracket 54, the third bracket 54 has an annular side wall, the third cover body 52 and the fourth filter element layer are spaced apart from the annular side wall and form a second water inlet channel 51, and the fourth cover body 53 is sealed with the annular side wall.

[0074] Specifically, the third cover 52 and the fourth cover 53 support the fourth filter layer. The third and fourth covers 52, 53 can be connected to the fourth filter layer by any suitable method, such as bonding or welding. Water flows into the inlet side of the fourth filter layer through the second inlet channel 51. After being filtered by the fourth filter layer, the water flows through the outlet side of the fourth filter layer into the third outlet channel 521 and out of the housing 3 through the third outlet channel 521. Furthermore, a sealing ring 9 is provided between the fourth cover 53 and the annular sidewall to maintain a seal between the fourth cover 53 and the annular sidewall.

[0075] The third filter element assembly 5 is installed on the first bracket 21, the second water outlet channel 211 passes through the fourth filter element layer, and a groove is provided on the outer surface of the second water outlet channel 211, and a sealing ring 9 is provided in the groove, so that the sealing ring 9 is located between the second water outlet channel 211 and the fourth filter element layer, thereby playing a sealing role.

[0076] The fourth filter core layer can be any suitable form such as a PP filter core layer 13 , a CTO filter core layer 14 or an ultrafiltration filter core layer 23 .

[0077] In this embodiment, the fourth filter core layer is a carbon rod filter core layer 55. After the RO water filtered by the reverse osmosis filter assembly 6 passes through the fourth filter core layer, the taste can be improved.

[0078] The filter element structure provided in this embodiment is such that the water inlet sides of at least two filter element assemblies among the multiple filter element assemblies can take in water through the first water inlet channel 4. That is, when the first water inlet channel 4 forms an interface with the external device, water can be supplied to the water inlet sides of at least two filter element assemblies, which can reduce the number of interfaces between the filter element structure and the external device, thereby reducing the number of interfaces of the water purification equipment, thereby reducing the risk of water leakage of the water purification equipment.

[0079] Example 2

[0080] The water purification equipment provided in this embodiment is as follows Figures 6 and 7 As shown, it includes the filter element structure provided in Example 1. The water inlet sides of at least two filter element assemblies among the multiple filter element assemblies can be supplied with water through the first water inlet channel 4. That is, when the first water inlet channel 4 forms an interface with the external device, water can be supplied to the water inlet sides of at least two filter element assemblies, which can reduce the number of interfaces between the filter element structure and the external device, thereby reducing the number of interfaces of the water purification device, thereby reducing the risk of water leakage in the water purification device.

[0081] Furthermore, the water purification device further includes a reverse osmosis filter assembly 6 ; the outlet of the second filter element assembly 2 is communicated with the inlet of the reverse osmosis filter assembly 6 , and the outlet of the reverse osmosis filter assembly 6 is communicated with the second water inlet channel 51 .

[0082] Specifically, the first filter core layer in the second filter core assembly 2 is a PP filter core layer 13 , the second filter core layer is a CTO filter core layer 14 , and the fourth filter core layer in the third filter assembly is a carbon rod filter core layer 55 .

[0083] The raw water flows into the reverse osmosis filter component 6 after being filtered by the second filter element component 2. The second filter element component 2 provides pretreatment for the reverse osmosis filter component 6. The RO water obtained by filtering the reverse osmosis filter component 6 is filtered by the third filter component to obtain reverse osmosis purified water with better taste.

[0084] Specifically, if Figure 6 As shown, the water purification device is further provided with a first faucet 7 and a second faucet 8. The first faucet 7 is connected to the second water outlet channel 211, and the second faucet 8 is connected to the third water outlet channel 521. The reverse osmosis filtration assembly 6 includes an inlet valve 61, a booster pump 62, an RO membrane filter element 63 and a one-way high-pressure switch 64 connected in sequence. The water inlet of the inlet valve 61 is connected to the first water outlet channel 111, and the water outlet of the one-way high-pressure switch 64 is connected to the second water inlet channel 51.

[0085] When the first faucet 7 is opened and the second faucet 8 is closed, raw water is filtered by the ultrafiltration filter element layer 23 and then discharged from the first faucet 7 as ultrafiltration purified water.

[0086] When both the first faucet 7 and the second faucet 8 are opened, the water purification equipment will simultaneously prepare ultrafiltration purified water and RO pure water; wherein, the process of preparing ultrafiltration purified water is: the raw water is filtered through the ultrafiltration filter element layer 23 and the ultrafiltration purified water is discharged from the first faucet 7; the process of preparing RO pure water is: the one-way high-pressure switch 64 is closed, the water inlet valve 61 is opened and the booster pump 62 is started, the raw water is filtered through the PP filter element layer 13 and the CTO filter element layer 14 in the first filter element assembly 1, and then pressurized by the booster pump 62 and transported to the RO membrane filter element 63 for filtration. The RO pure water obtained by filtration by the RO membrane filter element 63 enters the carbon rod filter element layer 55 of the third filter element assembly 5 for filtration, and is discharged from the second faucet 8 after filtration.

[0087] When the first faucet 7 is closed and the second faucet 8 is opened, the water purification equipment prepares RO pure water. The preparation process of RO pure water is the same as above and will not be repeated here.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter element structure, characterized in that: It comprises a housing (3) and a plurality of filter element assemblies; A plurality of filter element assemblies are arranged in the housing (3); The housing (3) has a first water inlet channel (4), and the water inlet sides of at least two filter element assemblies are in communication with the first water inlet channel (4); The plurality of filter element assemblies include a first filter element assembly (1) and a second filter element assembly (2); The first filter element assembly (1) and the second filter element assembly (2) are sequentially arranged along the axial direction of the housing (3); the water inlet side of the first filter element assembly (1) and the water inlet side of the second filter element assembly (2) are both spaced apart from the inner wall of the housing (3) and form the first water inlet channel (4); The second filter element assembly (2) comprises a third filter element layer, a first bracket (21) and a second bracket (22); The top of the third filter core layer is fixedly connected to the first bracket (21), the bottom of the third filter core layer is fixedly connected to the second bracket (22), and the third filter core layer is spaced apart from the inner wall of the housing (3) to form the first water inlet channel (4); The first filter element assembly (1) is arranged on the first bracket (21); a second water outlet channel (211) is formed on the top of the first bracket (21), and the second water outlet channel (211) is communicated with the water outlet side of the third filter element layer; the second water outlet channel (211) passes through the first filter element assembly (1), and the second water outlet channel (211) and the housing (3) are intersected. The plurality of filter element assemblies further includes a third filter element assembly (5); The third filter element assembly (5) has a second water inlet channel (51), and the second water inlet channel (51) is arranged to penetrate the housing (3); The first filter element assembly (1) is sleeved on the outside of the third filter element assembly (5); The third filter element assembly (5) comprises a fourth filter element layer. The third filter element assembly (5) is mounted on the first bracket (21). The second water outlet channel (211) passes through the fourth filter element layer. A card slot is provided on the outer surface of the second water outlet channel (211). A sealing ring (9) is provided in the card slot. The sealing ring (9) is located between the second water outlet channel (211) and the fourth filter element layer.

2. The filter element structure according to claim 1, characterized in that: The first filter core assembly (1) comprises a first filter core layer and a second filter core layer; the first filter core layer is sleeved on the outside of the second filter core layer, and the first filter core layer is spaced apart from the inner wall of the housing (3) to form the first water inlet channel (4).

3. The filter element structure according to claim 2, characterized in that: The first filter element assembly (1) further comprises a first cover (11) and a second cover (12); The top of the first filter core layer and the top of the second filter core layer are both fixedly connected to the first cover (11), and the bottom of the first filter core layer and the bottom of the second filter core layer are both fixedly connected to the second cover (12); A first water outlet channel (111) is formed on the top of the first cover body (11), the first water outlet channel (111) is communicated with the water outlet side of the second filter layer, and the first water outlet channel (111) and the housing (3) are interpenetratingly arranged.

4. The filter element structure according to claim 2, characterized in that: The first filter core layer is a PP filter core layer (13), and the second filter core layer is a CTO filter core layer (14).

5. The filter element structure according to claim 4, characterized in that: The third filter core layer is an ultrafiltration filter core layer (23).

6. The filter element structure according to claim 1, characterized in that: The third filter element assembly (5) comprises a third cover (52), a fourth cover (53) and a third bracket (54); The top of the fourth filter core layer is fixedly connected to the third cover body (52), and the bottom of the fourth filter core layer is fixedly connected to the fourth cover body (53); a third water outlet channel (521) is formed on the top of the third cover body (52), and the third water outlet channel (521) is communicated with the water outlet side of the fourth filter core layer, and the third water outlet channel (521) and the housing (3) are arranged to penetrate; The fourth filter core layer, the third cover body (52) and the fourth cover body (53) are all arranged in the third bracket (54), the third bracket (54) has an annular side wall, the third cover body (52) and the fourth filter core layer are spaced apart from the annular side wall and form the second water inlet channel (51), and the fourth cover body (53) is sealed with the annular side wall.

7. The filter element structure according to claim 6, characterized in that: The fourth filter core layer is a carbon rod filter core layer (55).

8. A water purification device, characterized in that: The invention comprises the filter element structure according to any one of claims 1 to 7.

9. The water purification device according to claim 8, characterized in that: The water purification device further comprises a reverse osmosis filtration component (6); The filter element structure is the filter element structure according to any one of claims 1 to 7; The outlet of the second filter element assembly (2) is communicated with the inlet of the reverse osmosis filter assembly (6), and the outlet of the reverse osmosis filter assembly (6) is communicated with the second water inlet channel (51).

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