Composite filter element assembly and water purifier comprising same
By designing a composite filter element assembly in the water purifier, the first and third filter elements are arranged axially within a single housing, and their inlet and outlet are connected by a composite pipe. This solves the problem of large radial dimensions of the filter elements in the water purifier, achieving a compact structure, reduced costs, and improved filtration efficiency.
Patent Information
- Application Number
- CN202520281065.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In existing water purifiers, the radial dimension of the two filter cartridges after integration is relatively large, making it difficult to install in narrow spaces.
A composite filter element assembly is designed, in which a first filter element assembly and a third filter element assembly are arranged sequentially along the axial direction inside a housing, and their inlet and outlet are connected to different connection ports through a composite tube. The interior of the composite tube defines two mutually sealed and isolated composite channels.
The number of outer shells has been reduced, resulting in a compact structure, lower manufacturing costs, improved filtration efficiency, and a simplified assembly process.
Smart Images
Figure CN223732233U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water purifier field especially relates to a composite filter element assembly. BACKGROUND
[0002] In part water purifier, two filter element assemblies are integrated in a shell, because two filter element assemblies are arranged simultaneously, the radial dimension is large, and it is difficult to install into narrow space. SUMMARY
[0003] The utility model solves the technical problem that the radial dimension of two filter element assemblies is large in prior art, and provides a composite filter element assembly and a water purifier comprising the same.
[0004] The utility model solves the above technical problem through the following technical scheme:
[0005] A composite filter element assembly comprises:
[0006] A shell defines a first cavity inside, and four connecting ports are arranged at one end of the composite filter element assembly along the axial direction;
[0007] Two filter element assemblies are a first filter element assembly and a third filter element assembly, which are arranged in sequence along the axial direction away from the connecting ports and located in the first cavity, and the inlet and outlet of the first filter element assembly are connected to different connecting ports correspondingly;
[0008] The first filter element assembly has a first channel penetrating along the axial direction inside, and the composite filter element assembly further comprises a composite pipe, which is arranged in the first channel along the axial direction, and the composite pipe defines two composite channels inside, which are sealed and isolated from each other, and the inlet and outlet of the third filter element assembly are connected to different connecting ports correspondingly through different composite channels.
[0009] In the scheme, the first filter element assembly and the third filter element assembly are arranged in one shell, which can reduce the number of shells, compact the structure and reduce the manufacturing cost.
[0010] Compared with arranging two connecting pipes to form one composite channel respectively, defining two composite channels in one composite pipe to connect the inlet and outlet of the third filter element assembly and different connecting ports on the shell respectively has the following advantages: first, the composite pipe can be compact in the radial direction of the composite filter element assembly, so as to reduce the radial dimension of the composite filter element assembly or increase the occupied space of the filter element under the same radial dimension, and improve the filtering effect; second, the manufacturing cost can be reduced; third, the positioning process of the composite pipe can be reduced during assembly, so that the assembly is simple.
[0011] Preferably, the composite tube has an outer tube extending in the axial direction and a partition plate located in the outer tube, a surface of the partition plate and an inner surface of the outer tube being used to surround at least part of the two composite channels.
[0012] In this scheme, the structure is simple and compact.
[0013] Preferably, the two composite channels are each provided with a sealing member at the axial end thereof, and the sealing members located at the same axial end of the two composite channels are arranged in axial misalignment.
[0014] In this scheme, compared with the two sealing members being arranged at the same axial position, the axial misalignment of the sealing members can reduce the radial dimension required for installing the sealing members on the composite tube, and further facilitate the radial compactness of the composite filter element assembly.
[0015] Preferably, the composite tube has mounting portions at the axial ends of the outer tube, the sealing members located at the axial ends of the composite channels are a first sealing member and a second sealing member, the first sealing member is arranged outside the outer tube, an inner cavity of the mounting portion forms part of one of the composite channels and is sealed from the other composite channel, the inner diameter of the inner cavity is larger than the inner diameter of other parts of the composite channel, and the second sealing member is arranged at the mounting portion in the axial direction.
[0016] In this scheme, the inner diameter of the inner cavity is larger than the inner diameter of other parts of the composite channel, which facilitates the outer diameter or inner diameter of the mounting portion being large enough to install the second sealing member.
[0017] Preferably, the housing is provided with a plurality of recesses arranged in sequence and sealed from each other at one end of the connection port in the axial direction, the recesses correspond one-to-one to the connection ports, and are used to communicate the connection ports with the inlets or outlets of the filter element assemblies corresponding to the connection ports.
[0018] Preferably, the parts of the two composite channels formed in the end of the composite tube facing the connection port in the axial direction are sealingly inserted into the two recesses corresponding to the inlets and outlets of the third filter element assembly through different sealing members.
[0019] Preferably, the composite filter element assembly further comprises an inner housing, and the third filter element assembly further comprises a first cover arranged in the inner housing, the parts of the two composite channels formed in the end of the composite tube away from the connection port in the axial direction are sealingly inserted into the inner housing and the first cover through different sealing members, and the inlet and outlet of the third filter element assembly are formed in the radial middle part of the first cover and communicated with the corresponding composite channels through the flow channel defined between the inner surface of the inner housing and the outer surface of the first cover.
[0020] Preferably, the shell comprises a shell body and a shell end cover, the shell end cover covers one end of the shell body axially away from the connecting port, and together with the shell body, defines the first cavity, and the shell end cover is provided with a holding portion protruding axially away from the connecting port.
[0021] In this scheme, the shell is divided into a shell end cover and a shell body, so as to facilitate the installation of the first filter element assembly and the third filter element assembly into the shell body and then sealing by the shell end cover. The holding portion is arranged on the shell end cover, so as to facilitate holding and carrying the composite filter element assembly, and the structure of the shell body is simplified, facilitating processing and manufacturing.
[0022] Preferably, the number of the connecting ports is four, and the connecting ports are in one-to-one correspondence with the inlets and outlets of the first filter element assembly and the inlets and outlets of the third filter element assembly.
[0023] Preferably, at least one of the filter element assemblies comprises a first cover body, a filter element, and a second cover body arranged in sequence along an axial direction away from the connecting port, the inlet of the filter element assembly is formed on the circumferential side of the filter element, and at least one outlet of the filter element assembly is formed in the radial middle part of the first cover body.
[0024] Preferably, the first cover body, the filter element, and the radial middle part of the second cover body of the first filter element assembly are all provided with an axial through channel to sequentially communicate to form the first channel.
[0025] Preferably, the composite filter element assembly further comprises an inner shell, the second cover body of the third filter element assembly covers one end of the inner shell axially away from the connecting port, and together with the inner shell, defines a second cavity, and the filter element and the second cover body of the third filter element assembly are arranged in the second cavity.
[0026] The composite channel corresponding to the inlet and outlet of the third filter element assembly is respectively an inflow channel and an outflow channel, one end of the inner shell axially towards the connecting port has an opening, and the part of the first cover body forming the outlet of the third filter element assembly extends into the opening of the inner shell and is sealingly connected with the part of the composite tube forming the outflow channel, and a flow passage is formed between the inner surface of the inner shell and the outer surface of the first cover body of the third filter element assembly to communicate the inflow channel and the inlet of the third filter element assembly.
[0027] A water purifier comprises the composite filter element assembly according to any one of the above technical schemes, and the inlets and outlets of the two filter element assemblies are communicated through the corresponding connecting ports to form parallel connection or series connection.
[0028] In this scheme, the first filter element assembly and the third filter element assembly form series connection or parallel connection.
[0029] Preferably, the water purifier further comprises a second filter element assembly arranged outside the shell.
[0030] The two filter element assemblies are connected in series through the second filter element assembly; or the two filter element assemblies are connected in parallel to form a parallel body, and the parallel body is connected in series with the second filter element assembly.
[0031] In the scheme, the second filter element assembly is arranged outside the shell, so that the second filter element assembly can be designed to be larger in size for main filtration, and the first filter element assembly and the third filter element assembly are arranged in the same shell, so that the first filter element assembly and the third filter element assembly can be designed to be smaller in size for simple filtration.
[0032] The positive progress effect of the utility model lies in:
[0033] By arranging the first filter element assembly and the third filter element assembly in the same shell, the number of shells can be reduced, the structure is compact, and the manufacturing cost can be reduced.
[0034] Compared with arranging two connecting pipes to form one composite channel respectively, or defining two composite channels in one composite pipe to respectively communicate with the inlet and the outlet of the third filter element assembly and the two connecting ports on the shell, the following advantages are obtained: first, the composite pipe can be compact in the radial direction of the composite filter element assembly, so that the radial size of the composite filter element assembly can be reduced, or the occupied space of the filter element can be increased under the same radial size, and the filtering effect is improved; second, the manufacturing cost can be reduced; third, the positioning process of the composite pipe can be reduced during assembly, and the assembly is simple. BRIEF DESCRIPTION OF DRAWINGS
[0035] Figure 1 It is a schematic view of the water purifier of Example 1.
[0036] Figure 2 It is a schematic view of the composite filter element assembly of Example 2.
[0037] Figure 3 It is a sectional view of the composite filter element assembly of Example 2.
[0038] Figure 4 It is a schematic view of the water inlet and outlet of the first filter element assembly of Example 2.
[0039] Figure 5 It is a schematic view of the water inlet and outlet of the third filter element assembly of Example 2.
[0040] Figure 6 It is a sectional view of the composite filter element assembly of Example 2.
[0041] Figure 7 It is a schematic view of the composite pipe of Example 2.
[0042] Figure 8 Figure 2 is a schematic view of the connection port and the recess on the shell of Example 2.
[0043] BRIEF DESCRIPTION OF DRAWINGS
[0044] Water purifier 10000
[0045] Composite filter element assembly 1000
[0046] Shell 1, shell body 11, shell end cover 12, holding portion 121, first cavity 13, connection port one 141, connection port two 142, connection port three 143, connection port four 144, recess one 151, recess two 152, recess three 153, recess four 154
[0047] First filter element assembly 2, first inlet 211, first outlet 212, cover one 22, filter element one 23, cover two 24, first channel 25
[0048] Third filter element assembly 3, third inlet 311, third outlet 312, cover three 32, filter element three 33, cover four 34
[0049] Composite tube 4, composite channel 41, inflow channel 411, outflow channel 412, outer tube 42, partition 43, mounting portion 44, first mounting portion 441, second mounting portion 442, inner cavity 443, first mounting groove 451, second mounting groove 452
[0050] Inner shell 6, second cavity 61
[0051] Second filter element assembly 2000, second inlet 2001, second outlet 2002 DETAILED DESCRIPTION
[0052] The present application will be further described below by way of examples, but the present application is not limited to the scope of the examples.
[0053] Example 1
[0054] The present application provides a water purifier, Figure 1 Figure 1 is a schematic view of the present application.
[0055] As Figure 1The water purifier 10000 comprises three filter core assemblies, namely a first filter core assembly 2, a second filter core assembly 2000 and a third filter core assembly 3, and the inlets and outlets of the filter core assemblies, namely a first inlet 211 and a first outlet 212, a second inlet 2001 and a second outlet 2002, and a third inlet 311 and a third outlet 312. The first filter core assembly 2 and the third filter core assembly 3 are integrated in a shell 1 to form a composite filter core assembly 1000, and the second filter core assembly 2000 is arranged outside the shell 1. The shell 1 is provided with four connecting ports, namely a connecting port one 141, a connecting port two 142, a connecting port three 143 and a connecting port four 144, which are in one-to-one correspondence with the inlets and outlets of the first filter core assembly 2 and the third filter core assembly 3. Specifically, the connecting port one 141, the first inlet 211, the first outlet 212, the connecting port two 142, the second inlet 2001, the second outlet 2002, the connecting port three 143, the third inlet 311, the third outlet 312 and the connecting port four 144 are sequentially communicated, so that the first filter core assembly 2, the second filter core assembly 2000 and the third filter core assembly 3 are sequentially connected in series to purify the fluid three times. Figure 1 The communication between the connecting ports and the inlets and outlets of the filter core assemblies is shown by dashed lines, and the arrow direction of the dashed line represents the flow direction of the fluid during the purification process. Figure 1 It should be understood that,
[0056] In the utility model, the first filter core assembly 2 and the third filter core assembly 3 are arranged in the shell 1, so that the number of shells 1 can be reduced, the structure is compact, and the manufacturing cost can be reduced. The second filter core assembly 2000 is arranged outside the shell 1, so that the size of the second filter core assembly 2000 can be set to be larger for main filtration, and the first filter core assembly 2 and the third filter core assembly 3 are arranged in the same shell 1, so that the size can be made smaller for simple filtration.
[0057] In other embodiments, the second filter core assembly 2000 can not be arranged, the connecting port two 142 and the connecting port three 143 can be communicated or arranged as one connecting port to realize the series connection of the first filter core assembly 2 and the third filter core assembly 3. When the first filter core assembly 2 and the third filter core assembly 3 are connected in series, the connecting port two 142 and the connecting port three 143 can be arranged to be close to each other, so as to facilitate the pipeline communication.
[0058] In other embodiments, connection port 141 and connection port 343 can be connected or set as one connection port, and connection port 242 and connection port 444 can be connected or set as one connection port to realize the parallel connection of the first filter element assembly 2 and the third filter element assembly 3 to form a parallel body. When there is no second filter element assembly 2000, connection port 242 and connection port 444 can be directly connected or set as one connection port and connected to the outlet of the water purifier 10000. When there is a second filter element assembly 2000, connection port 242 and connection port 444 can be connected to the second inlet 2001 of the second filter element assembly 2000, so that the parallel body is connected in series upstream of the second filter element assembly 2000, or connection port 141 and connection port 343 can be connected to the second outlet 2002 of the second filter element assembly 2000, so that the parallel body is connected in series downstream of the second filter element assembly 2000. When the first filter element assembly 2 and the third filter element assembly 3 are connected in parallel, the connection port 141 and the connection port 3 143 can be set close to each other, and / or the connection port 2 142 and the connection port 4 144 can be set close to each other to facilitate pipeline connection.
[0059] Example 2
[0060] This embodiment provides a composite filter element assembly for use in a water purifier. The structure of the water purifier can refer to Embodiment 1 and other embodiments or existing water purifiers. Figures 2-8 This is a schematic diagram of this embodiment.
[0061] like Figure 2 , Figure 3 The axial direction of the composite filter element assembly 1000 is the L direction. The composite filter element assembly 1000 includes a housing 1, two filter element assemblies, and a composite tube 4.
[0062] The outer shell 1 has a first cavity 13 defined inside. The outer shell 1 has four connection ports at one end along the L direction, namely connection port one 141, connection port two 142, connection port three 143, and connection port four 144. The direction along the L direction toward the connection ports is the L1 direction, and the direction away from the connection ports is the L2 direction.
[0063] Both filter elements are disposed within the first cavity 13, specifically the first filter element 2 and the third filter element 3 arranged sequentially along the L2 direction;
[0064] The inlet of the first filter element assembly 2 is the first inlet 211, which is connected to the first connection port 141. The outlet of the first filter element assembly 2 is the first outlet 212, which is connected to the second connection port 142. Figure 4 The dashed line with arrows in the middle illustrates the flow path of fluid entering and exiting the first filter element assembly 2;
[0065] The interior of the first filter element assembly 2 has a first channel 25 extending along the L direction;
[0066] The composite pipe 4 is arranged in the first channel 25 along the L direction, and two composite channels 41, namely an inflow channel 411 and an outflow channel 412, are defined in the composite pipe 4.
[0067] The inlet of the third filter element assembly 3 is a third inlet 311, which is communicated with the connecting port three 143 through the inflow channel 411, and the outlet of the third filter element assembly 3 is a third outlet 312, which is communicated with the connecting port four 144 through the outflow channel 412. Figure 5 The flow path of the fluid entering and exiting the third filter element assembly 3 is schematically shown by the dashed line with arrows.
[0068] Compared with arranging two connecting pipes to form one composite channel 41 respectively, in the utility model, two composite channels 41 are defined in one composite pipe 4 to communicate the inlet and outlet of the third filter element assembly 3 and the two connecting ports on the shell 1, which has the following advantages: first, the composite pipe 4 can be made compact in the radial direction of the composite filter element assembly 1000, thereby reducing the radial size of the composite filter element assembly 1000 or increasing the occupied space of the filter element under the same radial size, and improving the filtering effect; second, the manufacturing cost can be reduced; third, the positioning process of the composite pipe 4 can be reduced during assembly, and the assembly is simple.
[0069] As shown in Figure 3 , the structures of the two filter element assemblies are similar, and both have a first cover body, a filter element and a second cover body arranged in sequence along the L2 direction, and the first filter element assembly 2 specifically has a cover body one 22, a filter element one 23 and a cover body two 24, and the third filter element assembly 3 specifically has a cover body three 32, a filter element three 33 and a cover body four 34.
[0070] In the first filter element assembly 2, the first inlet 211 is formed on the circumferential side of the filter element one 23 and specifically has a plurality of first inlets; the first outlet 212 is formed on the radial middle part of the cover body one 22 and the cover body two 24, and in the embodiment, the first outlet 212 formed on the cover body one 22 is used to communicate with the connecting port two 142. Further, the radial middle parts of the cover body one 22, the filter element one 23 and the cover body two 24 are all provided with channels penetrating along the L direction to sequentially communicate to form the first channel 25 for the composite pipe 4 to pass through. In the third filter element assembly 3, the third inlet 311 is formed on the circumferential side of the filter element three 33, and the third outlet 312 is formed on the radial middle part of the cover body three 32.
[0071] As shown in Figure 3 , the composite filter element assembly 1000 further includes an inner shell 6, and the cover body four 34 is sealed on one end of the inner shell 6 in the L2 direction, and the cover body four 34 and the inner shell 6 define a second cavity 61, so that the cover body three 32 and the filter element three 33 are arranged in the second cavity 61. Figure 6The inner shell 6 has an opening at one end facing L1, and the cover 32 has a protrusion for forming a third outlet 312. The protrusion extends into the opening and is sealed to the composite tube 4 so that the third outlet 312 communicates with the outflow channel 412. A flow channel is formed between the inner surface of the inner shell 6 and the outer surface of the cover 32 to communicate with the inflow channel 411 and the third inlet 311.
[0072] like Figure 7 The composite tube 4 has an outer tube 42 extending along the L direction, and a partition 43 disposed inside the outer tube 42. The surface of the partition 43 and the inner surface of the outer tube 42 enclose a portion of two composite channels 41.
[0073] Both ends of the composite channel 41 along the axial direction are provided with sealing elements, specifically sealing rings, namely a first sealing ring and a second sealing ring. The two sealing rings located at the same end of the two composite channels 41 along the L direction are staggered in the L direction. Compared with the two sealing rings being set in the same position in the L direction, this arrangement can reduce the radial dimension required to install the sealing rings at the composite tube 4, which makes it easier to make the composite filter element assembly 1000 radially compact.
[0074] like Figure 6 , Figure 7 The outer tube 42 has a first mounting groove 451 on its outer side for mounting a first sealing ring. The composite tube 4 has mounting portions 44 at both ends of the outer tube 42 along the L direction, namely a first mounting portion 441 and a second mounting portion 442. The inner cavity 443 of the mounting portion 44 forms a portion of a composite channel 41, which is sealed and isolated from the other composite channel 41; for example, the inner cavity 443 of the first mounting portion 441 forms a portion of an inflow channel 411, which is sealed and isolated from an outflow channel 412. The inner diameter of the composite channel 41 at the inner cavity 443 is larger than the inner diameter of other portions of the composite channel 41. The second mounting groove 452 is provided along the L direction at the inner cavity 443 for mounting a second sealing ring, such that the radial dimension at the location where the second sealing ring is provided is sufficiently large. Specifically, the second mounting groove 452 at the first mounting portion 441 is formed on the outer side of the first mounting portion 441, and the second mounting groove 452 at the second mounting portion 442 is formed on the outer side of the cover body 32.
[0075] like Figure 2 , Figure 3 , Figure 8 The outer casing 1 has four sequentially nested grooves at one end facing L1, namely groove 151, groove 2 152, groove 4 154, and groove 3 153 from the outside to the inside. These grooves connect to connection port 141 and the first inlet 121, connection port 2 142 and the first outlet 122, connection port 4 144 and the third outlet 312, and connection port 3 143 and the third inlet 311, respectively. Groove 3 153 is circular, while the other grooves are annular.
[0076] likeFigure 6 、 Figure 7 , one end of the composite tube 4 towards the L1 direction, the first mounting part 441 is inserted into the groove three 153 and sealed by a second sealing ring, the outer tube 42 is inserted into the groove four 154 and sealed by a first sealing ring; one end of the composite tube 4 towards the L2 direction, the second mounting part 442 is inserted into the cover three 32 and sealed by a second sealing ring, the outer tube 42 is inserted into the inner shell and sealed by a first sealing ring, realizing the installation of the composite tube 4 in the outer shell 1.
[0077] The cover three 32, the filter core three 33, the cover four 34 and the outer shell 1 are sequentially abutted along the L2 direction, realizing the installation of the third filter core assembly 3 in the outer shell 1; the cover one 22 is inserted into the groove two 152 along the L1 direction and abuts and seals with the outer shell 1, the cover one 22, the filter core one 23 and the cover two 24 are sequentially abutted, the cover two 24 is inserted into the protrusion of the inner shell 6 along the L2 direction and abuts and seals with the inner shell 6, realizing the installation of the first filter core assembly 2 in the outer shell 1. It can be understood that the abutment can be direct abutment or indirect abutment through an adhesive or the like.
[0078] As Figure 3 , the outer shell 1 comprises an outer shell main body 11 and an outer shell end cover 12, the outer shell end cover 12 is capped at one end of the outer shell main body 11 towards the L2 direction, and cooperates with the outer shell main body 11 to jointly define the first cavity 13, so as to facilitate the installation of the first filter core assembly 2 and the third filter core assembly 3 into the outer shell main body 11 and then the sealing by the outer shell end cover 12. Further, the outer shell end cover 12 is provided with a holding part 121 outwardly protruding towards the L2 direction, so as to facilitate the holding and carrying of the composite filter core assembly 1000, and the setting of the holding part 121 on the outer shell end cover 12 facilitates the simplification of the structure of the outer shell main body 11 and the processing and manufacturing.
[0079] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.
Claims
1. A composite filter cartridge assembly, comprising: a housing, defining a first cavity inside, and provided with a plurality of connection ports at one end thereof along an axial direction of the composite filter cartridge assembly; two filter cartridge assemblies, namely a first filter cartridge assembly and a third filter cartridge assembly, arranged in sequence along the axial direction away from the connection ports, and located in the first cavity, an inlet and an outlet of the first filter cartridge assembly being correspondingly connected to different connection ports; characterized in that the first filter cartridge assembly has a first channel penetrating through inside along the axial direction, and the composite filter cartridge assembly further comprises a composite tube, which penetrates through the first channel along the axial direction, and defines two composite channels inside, which are sealed and isolated from each other, and an inlet and an outlet of the third filter cartridge assembly are correspondingly connected to different connection ports through different composite channels.
2. The composite filter cartridge assembly of claim 1 wherein, The composite tube has an outer tube extending along the axial direction and a partition plate located inside the outer tube, and a surface of the partition plate and an inner surface of the outer tube are used to surround at least part of the two composite channels; and / or, a sealing member is correspondingly arranged at each end of the two composite channels along the axial direction, and the sealing members located at the same end of the two composite channels are arranged in axial misalignment.
3. The composite filter cartridge assembly of claim 2 wherein, The composite tube has mounting portions at both ends of the outer tube along the axial direction, the sealing members located at both ends of the composite channels along the axial direction are first and second sealing members, the first sealing member is arranged outside the outer tube, an inner cavity of the mounting portion forms part of one of the composite channels, which is sealed and isolated from the other composite channel, an inner diameter of the composite channel at the inner cavity is larger than that of other parts, and the second sealing member is arranged at the mounting portion along the axial direction.
4. The composite filter cartridge assembly of claim 2 wherein, An end of the housing, at which the connection ports are arranged along the axial direction, is formed with a plurality of grooves, which are sequentially sleeved and sealed and isolated from each other, the grooves correspond to the connection ports one by one, and are used to connect the inlets or outlets of the filter cartridge assemblies corresponding to the connection ports, and parts of the two composite channels in the end of the composite tube, which faces the connection ports along the axial direction, are sealingly inserted into two grooves corresponding to the inlet and outlet of the third filter cartridge assembly through different sealing members; and / or, the composite filter cartridge assembly further comprises an inner housing, and the third filter cartridge assembly further comprises a first cover arranged in the inner housing, parts of the two composite channels in the end of the composite tube, which faces away from the connection ports along the axial direction, are sealingly inserted into the inner housing and the first cover through different sealing members, and the inlet and outlet of the third filter cartridge assembly are formed in the radial middle part of the first cover and connected to the corresponding composite channel through a flow channel defined between an inner surface of the inner housing and an outer surface of the first cover.
5. The composite filter cartridge assembly of claim 1 wherein, The housing comprises a housing main body and a housing end cover, the housing end cover covers an end of the housing main body, which is away from the connection ports along the axial direction, and cooperates with the housing main body to define the first cavity, and the housing end cover is provided with a holding portion protruding outward along the axial direction away from the connection ports. And / or, the number of the connection ports is four, which are communicated with the inlet and outlet of the first filter element assembly and the inlet and outlet of the third filter element assembly one by one.
6. The composite filter cartridge assembly of claim 1 wherein, At least one of the filter element assemblies comprises a first cover body, a filter element and a second cover body arranged in sequence along the direction axially away from the connection port, the inlet of the filter element assembly is formed on the lateral side of the filter element, and at least one outlet of the filter element assembly is formed in the radial middle part of the first cover body.
7. The composite filter cartridge assembly of claim 6 wherein, The radial middle part of the first cover body, the filter element and the second cover body of the first filter element assembly are each provided with a channel penetrating along the axial direction to sequentially communicate to form the first channel.
8. The composite filter cartridge assembly of claim 6 wherein, The composite filter element assembly further comprises an inner shell, the second cover body of the third filter element assembly is capped on one end of the inner shell axially away from the connection port, and the second cover body and the filter element of the third filter element assembly are arranged in the second cavity defined by the inner shell and the second cover body. The composite channel corresponding to the inlet and outlet of the third filter element assembly is respectively an inflow channel and an outflow channel, one end of the inner shell axially towards the connection port has an opening, the part of the first cover body forming the outlet of the third filter element assembly extends into the opening of the inner shell and is sealingly connected with the part of the composite tube forming the outflow channel, and a flow passage is formed between the inner surface of the inner shell and the outer surface of the first cover body of the third filter element assembly to communicate the inflow channel and the inlet of the third filter element assembly.
9. A water purifier characterized by comprising: It comprises the composite filter element assembly according to any one of claims 1-8, the inlets and outlets of the two filter element assemblies are communicated through the corresponding connection ports to form parallel or series connection.
10. The water purifier of claim 9, wherein The water purifier further comprises a second filter element assembly arranged outside the outer shell. The two filter element assemblies are connected in series through the second filter element assembly; or the two filter element assemblies are connected in parallel to form a parallel body, and the parallel body is connected in series with the second filter element assembly. The water purifier further comprises a second filter element assembly arranged outside the outer shell. The two filter element assemblies are connected in series through the second filter element assembly; or the two filter element assemblies are connected in parallel to form a parallel body, and the parallel body is connected in series with the second filter element assembly.