Composite filter element and water treatment device having the same

Abstract

The present invention discloses a composite filter element and a water treatment device having the same, wherein the composite filter element comprises: a housing, an inner tube, a PAC filter element and an activated carbon filter element, wherein the inner tube is arranged in the housing and divides the inner cavity of the housing into a first filter cavity and a second filter cavity, wherein the PAC filter element is arranged in the first filter cavity, and the activated carbon filter element is arranged in the second filter cavity. According to the composite filter element of the embodiment of the present invention, by arranging the inner tube in the housing and using the inner tube to separate the inner side of the housing, the PAC filter element and the activated carbon filter element are respectively installed in different areas, which can make full use of the internal space of the housing, and is conducive to reducing the volume of the housing, thereby providing convenience for the assembly and use of the composite filter element, and the combination of the PAC filter element and the activated carbon filter element can enhance the filtering effect of the composite filter element.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a composite filter element and a water treatment device having the composite filter element. Background Art

[0002] In the related art, water treatment devices such as water purifiers include multiple graded filter elements, which occupy a large space and have a small flux. They not only occupy a large indoor space, causing great inconvenience to users, but also fail to meet users' water needs. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the present invention proposes a composite filter element, which has a small volume and saves space.

[0005] The present invention also provides a water treatment device having the composite filter element.

[0006] According to the first aspect of the present invention, the composite filter element comprises: a shell, an inner tube, a PAC filter element and an activated carbon filter element. The inner tube is arranged in the shell and divides the inner cavity of the shell into a first filter cavity and a second filter cavity. The PAC filter element is arranged in the first filter cavity, and the activated carbon filter element is arranged in the second filter cavity.

[0007] According to the composite filter element of the embodiment of the present invention, an inner tube is arranged in the shell, and the inner tube is used to separate the inner part of the shell. The PAC filter element and the activated carbon filter element are respectively installed in different areas, so that the internal space of the shell can be fully utilized, which is beneficial to reducing the volume of the shell, thereby providing convenience for the assembly and use of the composite filter element. Moreover, the combination of the PAC filter element and the activated carbon filter element can enhance the filtering effect of the composite filter element.

[0008] According to the composite filter element of one embodiment of the present invention, the PAC filter element and the activated carbon filter element are arranged spaced apart along the axial direction of the housing.

[0009] According to a composite filter element according to one embodiment of the present invention, the inner tube includes: a surrounding plate and a lower end cover, the surrounding plate is formed into a tubular shape extending along the axial direction of the shell, the PAC filter element is arranged in the surrounding plate, the lower cover plate is arranged at the lower end of the surrounding plate, and the activated carbon filter element is arranged below the lower cover plate.

[0010] According to one embodiment of the present invention, the lower surface of the lower cover plate defines an annular mounting groove, and the upper end of the activated carbon filter element is inserted into the annular mounting groove.

[0011] According to a composite filter element according to one embodiment of the present invention, a first water inlet and a first water outlet are provided on the shell, the outer wall of the inner tube, the outer wall of the activated carbon filter element and the inner wall of the shell define a clean water cavity connected to the first water inlet, and the activated carbon filter element defines a water outlet cavity connected to the first water outlet.

[0012] According to a composite filter element according to one embodiment of the present invention, the first water outlet is located at the top of the shell, and the composite filter element also includes: a water outlet pipe, the water outlet pipe passes through the first filter cavity along the axial direction of the inner tube, the upper end of the water outlet pipe is connected to the first water outlet, and the lower end of the water outlet pipe is connected to the water outlet cavity.

[0013] The composite filter element according to one embodiment of the present invention further includes: an RO filter element, wherein the RO filter element is disposed in the second filter cavity.

[0014] Optionally, the RO filter element is sleeved on the inner tube and the activated carbon filter element.

[0015] According to one embodiment of the present invention, the RO filter element comprises: a central tube and a RO filter membrane, the central tube defines a filter material installation cavity, the inner tube and the activated carbon filter element are arranged in the filter material installation cavity, and the RO filter membrane is sleeved on the central tube.

[0016] According to one embodiment of the present invention, the central tube includes: a surrounding plate and a lower end cover, the surrounding plate is arranged around the inner tube and the activated carbon filter element, the lower end cover is arranged in the surrounding plate and located at the lower part of the surrounding plate, and the lower end cover closes the lower end of the surrounding plate to define the filter material installation cavity.

[0017] According to one embodiment of the present invention, a support platform extending along the axial direction of the central tube enclosure plate is provided on the upper surface of the lower end cover, and the lower end of the inner tube abuts against the support platform.

[0018] According to one embodiment of the present invention, a lower sealing cover is provided at the lower end of the activated carbon filter element, and the lower sealing cover is sealingly abutted between the activated carbon filter element and the lower end cover.

[0019] According to an embodiment of the present invention, a lower flange folded upward is formed on the outer peripheral edge of the lower sealing cover, and the inner wall of the lower flange abuts against the outer peripheral wall of the activated carbon filter element.

[0020] A water treatment device according to an embodiment of the second aspect of the present invention comprises the composite filter element according to the above embodiment.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic structural diagram of a composite filter element according to an embodiment of the present invention;

[0024] Figure 2 is an exploded view of a housing according to an embodiment of the present invention;

[0025] Figure 3 is along Figure 1 Sectional view along line AA;

[0026] Figure 4 is a schematic structural diagram of a central tube according to an embodiment of the present invention;

[0027] Figure 5 is a cross-sectional view of a central tube according to an embodiment of the present invention;

[0028] Figure 6 is a side view of a central tube according to an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of an inner tube according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] 100: composite filter element;

[0032] 10: shell; 11: cylinder; 111: water inlet; 112: water outlet; 12: cover; 13: adapter; 14: decorative cover; 15: handle.

[0033] 20: PAC filter element; 21: PAC skeleton; 22: PAC filter membrane; 23: PAC upper end cap; 24: PAC lower end cap;

[0034] 30: activated carbon filter element; 31: lower sealing cover;

[0035] 40: inner tube; 41: enclosure; 42: lower cover; 421: annular mounting groove;

[0036] 50: water outlet pipe;

[0037] 60: RO filter element; 61: center tube; 611: center tube enclosure; 612: lower end cover; 613: support platform; 62:

[0038] RO filter membrane. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Reference below Figure 1-Figure 7 A composite filter element 100 and a water treatment device having the composite filter element 100 according to an embodiment of the present invention are described.

[0043] like Figure 1 and 3 As shown, according to one embodiment of the present invention, the composite filter element 100 includes: a shell 10, an inner tube 40, a PAC filter element 20 and an activated carbon filter element 30. The shell 10 defines a filter chamber. The inner tube 40 is arranged in the shell 10 and divides the filter chamber into a first filter chamber and a second filter chamber. The first filter chamber and the second filter chamber are spaced apart, that is, the first filter chamber and the second filter chamber are not connected.

[0044] The PAC filter element 20 is disposed in the first filter cavity, and the housing 10 is provided with a water inlet 111 and a water outlet 112 connected to the first filter cavity. Water flows in from the water inlet 111, passes through the filtering effect of the PAC filter element 20, and then flows out from the water outlet 112. The activated carbon filter element 30 is disposed in the second filter cavity, and the housing 10 is also provided with a water inlet 111 and a water outlet 112 connected to the second filter cavity. Water flows in from the water inlet 111, passes through the filtering effect of the activated carbon filter element 30, and then flows out from the water outlet 112.

[0045] The first filter cavity may be disposed inside the second filter cavity, that is, the first filter cavity is defined inside the inner tube 40 , and the second filter cavity is disposed outside the inner tube 40 .

[0046] Therefore, according to the composite filter element 100 of the embodiment of the present invention, by setting the inner tube 40 in the shell 10 and using the inner tube 40 to separate the inner side of the shell 10, the PAC filter element 20 and the activated carbon filter element 30 are respectively installed in different areas, which can make full use of the internal space of the shell 10, which is beneficial to reducing the volume of the shell 10, thereby providing convenience for the assembly and use of the composite filter element 100, and the combination of the PAC filter element 20 and the activated carbon filter element 30 can enhance the filtering effect of the composite filter element 100.

[0047] like Figure 3 As shown, in this embodiment, the PAC filter element 20 and the activated carbon filter element 30 are arranged spaced apart along the axial direction of the housing 10, that is, the first filter chamber and the second filter chamber are spaced apart along the axial direction of the housing 10, and the inner tube 40 is arranged between the first filter chamber and the second filter chamber.

[0048] The activated carbon filter element 30 and the inner tube 40 are arranged along the axial direction of the shell 10, and the central axis of the inner tube 40 extends along the upper phase direction. The activated carbon filter element 30 is arranged below the inner tube 40, and the PAC filter element 20 is arranged in the inner tube 40 and extends along the axial direction of the inner tube 40.

[0049] The activated carbon filter element 30 and the inner tube 40 arranged along the axial direction of the inner tube 40 can make full use of the space of the built-in filter material installation cavity, which is beneficial to reducing the inner diameter of the shell 10, and then reducing the diameter and volume of the composite filter element 100. Moreover, the activated carbon filter element 30 and the PAC filter element 20 of the above structure have a simple structure, are easy to assemble, have high stability, and can fully improve the utilization rate of the activated carbon filter element 30 and the PAC filter element 20.

[0050] Furthermore, since the activated carbon filter element 30 and the PAC filter element 20 filter water flow, the water flow penetrates the wall of the filter element along the thickness direction of the filter element wall. When the diameters of the activated carbon filter element 30 and the PAC filter element 20 are fixed, the filtering capacity of the activated carbon filter element 30 and the PAC filter element 20 is proportional to the axial length of the filter element. The length of the activated carbon filter element 30 and the PAC filter element 20 in the axial direction of the housing 10 can be adjusted according to the filtering capacity of the activated carbon filter element 30 and the PAC filter element 20, thereby ensuring that the activated carbon filter element 30 and the PAC filter element 20 both reach the maximum utilization rate and prevent waste of filtering capacity.

[0051] like Figure 7 As shown, in this embodiment, the inner tube 40 includes: a surrounding plate 41 and a lower cover plate 42. The surrounding plate 41 is formed into a tubular shape extending along the axial direction of the housing 10. The upper end of the surrounding plate 41 is open, and the upper end of the surrounding plate 41 is sealed and connected to the inner wall of the housing 10. The upper end of the surrounding plate 41 is open, and the first filter cavity is connected to the water inlet 111 and the water outlet 112 of the first filter cavity through the upper open opening of the surrounding plate 41. The PAC filter element 20 is arranged in the surrounding plate 41 and extends along the axial direction of the surrounding plate 41, and the length of the PAC filter element 20 is less than or equal to the length of the surrounding plate 41. The lower cover plate 42 is connected to the lower end of the surrounding plate 41 and closes the lower end of the surrounding plate 41. The activated carbon filter element 30 is arranged below the lower cover plate 42. The upper surface of the lower cover plate 42 stops at the lower end of the PAC filter element 20, and the lower surface of the lower cover plate 42 stops at the upper end of the activated carbon filter element 30.

[0052] The inner tube 40 of the above structure has a simple structure and can not only accommodate the PAC filter element 20 and ensure the normal operation of the PAC filter element 20, but also use the lower cover plate 42 to separate the PAC filter element 20 from the activated carbon filter element 30 to prevent the PAC filter element 20 and the activated carbon filter element 30 from interfering with each other.

[0053] like Figure 7 As shown, in this embodiment, the lower surface of the lower cover plate 42 is defined with an annular mounting groove 421, the outer diameter of the annular mounting groove 421 is equal to the outer diameter of the activated carbon filter element, the inner diameter of the annular mounting groove 421 is equal to the inner diameter of the activated carbon filter element 30, and the upper end of the activated carbon filter element 30 is inserted into the annular mounting groove 421.

[0054] By providing an annular mounting groove 421 on the lower cover plate 42 , not only can the assembly of the activated carbon filter element 30 be facilitated, but also the airtightness of the cooperation between the activated carbon filter element 30 and the lower cover plate 42 can be improved, thereby preventing water leakage from affecting the filtering effect of the activated carbon filter element 30 .

[0055] According to a composite filter element 100 according to one embodiment of the present invention, a first water inlet 111 and a first water outlet 112 are provided on the shell 10, and the first water inlet 111 and the first water outlet 112 are both arranged on the top or the upper part of the side wall of the shell 10, and the outer wall of the inner tube 40, the outer wall of the activated carbon filter element 30 and the inner wall of the shell 10 define a clean water cavity connected to the first water inlet 111, and the activated carbon filter element 30 defines a water outlet cavity connected to the first water outlet 112.

[0056] The water flows into the water purification chamber from the first water inlet 111 , and then passes through the activated carbon filter element 30 to enter the water outlet chamber, thereby being filtered by the activated carbon filter element 30 to improve the water quality.

[0057] Among them, the first water outlet 112 is located at the top of the shell 10, and the composite filter element 100 also includes: a water outlet pipe 50, which penetrates the first filter cavity along the axial direction of the inner tube 40, and the upper end of the water outlet pipe 50 is connected to the first water outlet 112, and the lower end of the water outlet pipe 50 is connected to the water outlet cavity.

[0058] That is to say, the first water outlet 112 is connected to the water outlet chamber through the water outlet pipe 50, and the water outlet pipe 50 passes through the first filter chamber. The first water outlet 112 is arranged at the top of the shell 10, which can facilitate the water path design of the composite filter element 100 and prevent the water flow in the water outlet chamber from mixing with the water flow in the first filter chamber.

[0059] In some specific embodiments, the lower end of the water outlet pipe 50 is inserted into the lower cover plate 42, and the lower end of the water outlet pipe 50 is sealed with the lower cover plate 42. A through hole connecting the water outlet cavity and the water outlet pipe 50 is formed on the lower cover plate 42, thereby improving the assembly stability of the water outlet pipe 50.

[0060] like Figure 3 As shown, in some specific embodiments, the composite filter element 100 further includes: an RO filter element 60, which is disposed in the second filter cavity. By disposing the RO filter element 60 in the second filter cavity, the RO filter element 60 purifies the water flow in the second filter cavity, which can further improve the water quality in the second filter cavity, thereby improving the water hygiene of the user.

[0061] like Figure 3 As shown, in this embodiment, the RO filter element 60 is sleeved on the inner tube 40 and the activated carbon filter element 30, that is, the RO filter element 60 is formed into a tubular shape or a cylindrical shape with one end open, and the inner tube 40 and the activated carbon filter element 30 are arranged in the RO filter element 60. The RO filter element 60 divides the second filter cavity into a pure water cavity located in the RO filter element 60 and a first clean water cavity located outside the RO filter element 60, and the first water inlet 111 is connected to the first clean water cavity.

[0062] The water flows into the first water purification chamber through the first water inlet 111, and after being filtered by the RO filter element 60, the water flows into the pure water chamber, and the water in the pure water chamber passes through the activated carbon filter element 30 into the water outlet chamber, and finally flows out from the first water outlet 112. Thus, the water flow filtering effect can be increased once, and the water quality is improved. Moreover, the RO filter element 60 is sleeved on the inner tube 40 and the activated carbon filter element 30, which can save the space occupied by the RO filter element 60 and is conducive to reducing the volume of the composite filter element 100.

[0063] Furthermore, if Figure 3 and 5 As shown, the RO filter element 60 includes: a central tube 61 and a RO filter membrane 62. The central tube 61 defines a filter material installation cavity, the inner tube 40 and the activated carbon filter element 30 are arranged in the filter material installation cavity, and the RO filter membrane 62 is sleeved on the central tube 61 and extends along the axial direction of the central tube 61.

[0064] By defining a filter material installation cavity in the central tube 61, built-in filter material can be accommodated in the filter material installation cavity, thereby facilitating the combination of multiple filter elements and making full use of the internal space of the RO filter element 60 assembly, thereby reducing the overall volume of the composite filter element 100 and improving the filtering effect of the composite filter element 100.

[0065] like Figure 4-6 As shown, in this embodiment, the central tube 61 includes: a central tube enclosure plate 611 and a lower end cover 612. The central tube enclosure plate 611 is formed into a cylindrical shape with both ends open. The enclosure plate 41 is provided with a pure water through hole. The RO filter membrane 62 is sleeved on the central tube enclosure plate 611. The lower end cover 612 is provided in the central tube enclosure plate 611 and is located at the lower part of the central tube enclosure plate 611. The lower end cover 612 closes the lower end opening of the central tube enclosure plate 611 and cooperates with the central tube enclosure plate 611 to define a filter material installation cavity. In other words, the central tube 61 is formed into a cylindrical shape with an open upper end and a closed lower end.

[0066] Furthermore, if Figure 3 and 5 As shown, a support platform 613 extending along the axial direction of the central tube circumference plate 611 is provided on the upper surface of the lower end cover 612 , and the lower end of the inner tube 40 abuts against the support platform 613 .

[0067] By setting a support platform 613 that cooperates with the inner tube 40 on the side wall of the central tube enclosure plate 611, the assembly of the inner tube 40 can be facilitated. The supporting effect of the support platform 613 on the inner tube 40 can improve the assembly stability of the inner tube 40, and can reduce the squeezing effect of the inner tube 40 on the activated carbon filter element 30, thereby preventing the inner tube 40 from being damaged by excessive pressure on the activated carbon filter element 30, which is beneficial to extending the service life of the activated carbon filter element 30.

[0068] Furthermore, there are multiple support platforms 613 , and the multiple support platforms 613 are arranged at intervals along the circumference of the activated carbon filter element 30 , and the activated carbon filter element 30 is arranged on the inner side of the support platform 613 .

[0069] The support platform 613 can promote uniform stress on the inner tube 40 and prevent the inner tube 40 from being damaged or tilted due to uneven stress on a part of the inner tube 40. The support platform 613 is integrally formed with the central tube 61. The integrally formed central tube 61 can improve the connection stability and connection strength between the support platform 613 and the central tube 61, thereby improving the functional stability and reliability of the central tube 61. The connection mechanism between the support platform 613 and the lower end cover 612 can be eliminated, thereby improving the assembly efficiency of the central tube 61 and the composite filter element 100. The integrally formed central tube 61 has high strength and a long service life.

[0070] According to one embodiment of the present invention, a lower sealing cover 31 is provided at the lower end of the activated carbon filter element 30. The activated carbon filter element 30 is formed into a tubular shape. A water outlet chamber is defined in the tubular activated carbon filter element 30. The lower sealing cover 31 closes the lower end of the water outlet chamber and stops at the upper surface of the lower end cover 612. By providing the lower sealing cover 31 at the lower end of the activated carbon filter element 30, the airtightness of the water outlet chamber can be improved, water leakage between the water outlet chamber and the pure water chamber can be prevented, and the water flow quality can be improved.

[0071] Furthermore, if Figure 3 As shown, the outer peripheral edge of the lower sealing cover 31 is formed with an upwardly folded lower flange, the inner wall of the lower flange stops against the outer peripheral wall of the activated carbon filter element 30, and the outer wall of the lower flange abuts against the inner wall of the pure water chamber, thereby further improving the airtightness between the pure water chamber and the water outlet chamber.

[0072] like Figure 3 As shown, in this embodiment, the PAC filter element 20 includes: a PAC skeleton 21 and a PAC filter membrane 22, the PAC skeleton 21 is located in the inner tube 40 and extends along the axial direction of the inner tube 40, the PAC filter membrane 22 is sleeved on the PAC skeleton 21 and extends along the axial direction of the PAC skeleton 21, the PAC filter membrane 22 is a tubular filter element made of polyaluminum chloride material, and the thickness of the PAC filter membrane 22 is greater than 10 mm.

[0073] Since the filtering effect of the PAC filter membrane 22 is related to the thickness of the water flowing through the PAC filter membrane 22, the PAC filter membrane 22 and the PAC skeleton 21 are combined into a PAC filter element 20 and arranged in the inner tube 40, thereby reducing the diameter of the PAC filter element 20, thereby reducing the space occupied by the PAC filter element 20, and reducing the volume of the PAC filter membrane 22 and the production materials, which is conducive to reducing costs.

[0074] like Figure 3As shown, in this embodiment, the PAC filter element 20 further includes: a PAC upper end cap 23 and a PAC lower end cap 24, the PAC upper end cap 23 is sleeved on the upper end of the PAC frame 21, the lower surface of the PAC upper end cap 23 seals against the upper end surface of the PAC filter membrane 22, the PAC lower end cap 24 is sleeved on the lower end of the PAC frame 21, the upper surface of the PAC lower end cap 24 seals against the lower end surface of the PAC filter membrane 22. The outlet pipe 50 passes through the PAC upper end cap 23 and the PAC lower end cap 24, and the outer circumference of the PAC lower end cap 24 is sealed with the inner circumferential wall of the inner tube 40.

[0075] By setting the PAC upper end cover 23 and the PAC lower end cover 24, the airtightness of the upper and lower ends of the PAC filter membrane 22 can be improved, preventing the water flow in the PAC filter membrane 22 from flowing out from the upper or lower end of the PAC filter membrane 22, and improving the airtightness of the tap water cavity.

[0076] like Figure 3 As shown, in this embodiment, the outer peripheral edge of the PAC upper end cover 23 is formed with an upper flange folded downward, the inner wall of the upper flange abuts against the outer peripheral wall of the PAC filter membrane 22, and the outer wall of the upper flange is aligned with the inner wall of the inner tube 40.

[0077] The outer peripheral edge of the PAC lower end cover 24 is formed with an upwardly folded lower flange, the inner wall of the lower flange abuts against the outer peripheral wall of the PAC filter membrane 22, and the outer wall of the lower flange seals against the inner peripheral wall of the inner tube 40, thereby improving the airtightness and reliability of the PAC filter element 20 and preventing water leakage.

[0078] like Figure 2 As shown, according to one embodiment of the present invention, the shell 10 includes: a cylinder 11 and a cover 12, the bottom of the cylinder 11 is open, the inner tube 40, the PAC filter element 20 and the activated carbon filter element 30 are all arranged in the cylinder 11, the cover 12 is connected to the cylinder 11 to close the open mouth of the cylinder 11, and the water inlet 111 and the water outlet 112 are both arranged at the top of the cylinder 11.

[0079] The housing 10 is also provided with an adapter 13, which is plugged into the water inlet 111 and the water outlet 112. The adapter 13 is provided to facilitate the assembly of the water channel of the composite filter element 100 and improve the airtightness of the water channel.

[0080] The shell 10 is also provided with a decorative cover 14 , which is covered on the top of the cylinder 11 , and the water inlet 111 and the water outlet 112 are both covered in the decorative cover 14 , thereby improving the appearance of the composite filter element 100 .

[0081] In this embodiment, a handle 15 is further provided on the top of the cylinder 11, and a first connection point and a second connection point arranged at intervals are provided on the side wall of the cylinder 11. One end of the handle 15 is connected to the first connection point, and the other end is connected to the second connection point. When removing or assembling the composite filter element 100, the user can lift and place the composite filter element 100, which is convenient to operate and has strong stability. In addition, the handle 15 has a simple structure and is easy to implement.

[0082] The water treatment device according to the second aspect of the present invention includes the composite filter element 100 described in the above embodiment. By adopting the composite filter element 100 in the above embodiment, the volume of the water treatment device can be reduced, the occupied space can be saved, and the water quality can be improved, which provides convenience for users.

[0083] Other structures and operations of the water treatment device according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A composite filter element, characterized in that: include: case; An inner tube, the inner tube is arranged in the shell and divides the inner cavity of the shell into a first filter cavity and a second filter cavity; A PAC filter element, wherein the PAC filter element is disposed in the first filter cavity; An activated carbon filter element, the activated carbon filter element is arranged in the second filter cavity; the inner tube includes: a baffle, the baffle is formed into a tubular shape extending along the axial direction of the shell, the PAC filter element is arranged in the baffle; a lower cover plate, the lower cover plate is arranged at the lower end of the baffle plate, and the activated carbon filter element is arranged below the lower cover plate; and also includes: an RO filter element, the RO filter element is arranged in the second filter cavity, the RO filter element includes: a central tube, a filter material installation cavity is defined in the central tube, the inner tube and the activated carbon filter element are arranged in the filter material installation cavity; an RO filter membrane, the RO filter membrane sleeve is arranged On the central tube, the central tube includes: a surrounding plate, which is arranged around the inner tube and the activated carbon filter element; a lower end cover, which is arranged inside the surrounding plate and located at the lower part of the surrounding plate, and the lower end cover closes the lower end of the surrounding plate to define the filter material installation cavity, and the upper surface of the lower end cover is provided with a support platform extending along the axial direction of the central tube surrounding plate, and the lower end of the inner tube abuts on the support platform; there are multiple support platforms, and the multiple support platforms are arranged at intervals along the circumference of the activated carbon filter element, and the activated carbon filter element is arranged on the inner side of the support platform, and the support platform is close to the support platform. The central tube is integrally formed; the shell is provided with a water inlet and a water outlet connected to the first filter cavity, and water flows in from the water inlet and flows out from the water outlet after being filtered by the PAC filter element; the shell is provided with a first water inlet and a first water outlet, the outer wall of the inner tube, the outer wall of the activated carbon filter element and the inner wall of the shell define a clean water cavity connected to the first water inlet, the activated carbon filter element defines a water outlet cavity connected to the first water outlet, and the first water outlet is located at the top of the shell, and the composite filter element also includes: a water outlet pipe, which is arranged along the axial direction of the inner tube The first filter cavity is penetrated, the upper end of the water outlet pipe is connected to the first water outlet, and the lower end of the water outlet pipe is connected to the water outlet cavity; the RO filter element is sleeved on the inner tube and the activated carbon filter element; the RO filter element divides the second filter cavity into a pure water cavity located inside the RO filter element and a first clean water cavity located outside the RO filter element, the first water inlet is connected to the first clean water cavity, water flows into the first clean water cavity through the first water inlet, and after the filtering effect of the RO filter element, the water flows into the pure water cavity, and the water in the pure water cavity passes through the activated carbon filter element and enters the water outlet cavity.

2. The composite filter element according to claim 1, characterized in that: The PAC filter element and the activated carbon filter element are arranged in a spaced relationship along the axial direction of the housing.

3. The composite filter element according to claim 1, characterized in that: The lower surface of the lower cover plate defines an annular mounting groove, and the upper end of the activated carbon filter element is inserted into the annular mounting groove.

4. The composite filter element according to claim 1, characterized in that: A lower sealing cover is provided at the lower end of the activated carbon filter element, and the lower sealing cover is sealed and abutted between the activated carbon filter element and the lower end cover.

5. The composite filter element according to claim 4, characterized in that: The outer peripheral edge of the lower sealing cover is formed with an upwardly folded lower flange, and the inner wall of the lower flange abuts against the outer peripheral wall of the activated carbon filter element.

6. A water treatment device, characterized in that: Comprising the composite filter element according to any one of claims 1-5.

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