Composite filter element and water purification equipment

Abstract

The utility model discloses a composite filter element and water purification equipment, and relates to the technical field of water purification, the composite filter element comprises a filter bottle, a filter bottle cover, a separation cylinder, a reverse osmosis filter assembly and a replaceable filter element assembly; the separation cylinder is arranged in the filter bottle and forms a first filter cavity and a second filter cavity which are isolated from each other, the reverse osmosis filter assembly is arranged in the first filter cavity, and the replaceable filter element assembly is detachably arranged in the second filter cavity; the replaceable filter element assembly comprises a shell and a filter element assembly arranged in the shell, a rear water inlet is formed in the shell, a reverse osmosis water outlet communicated with the second filter cavity is further formed in the bottom of the separation barrel, and the reverse osmosis water outlet is communicated with the rear water inlet in an inserted mode. According to the composite filter element disclosed by the utility model, the technical problem that impurities and solid particles filtered by the filter element can remain on the cavity wall after the replaceable filter element assembly is detached from the filter cavity of the composite filter element can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a composite filter element and water purification equipment. Background Art

[0002] In the related art, the integrated composite filter element of the water purification equipment includes a filter element body and a replaceable filter element assembly. The filter element body is integrated with a reverse osmosis filter element, and the replaceable filter element assembly is integrated with a post-filter element or a pre- and post-filter element. The replaceable filter element assembly is removable relative to the filter element body for easy replacement. However, because the reverse osmosis filter element and the post-filter element are directly connected through a water hole opened in the cavity wall, after the replaceable filter element assembly is removed from the cavity of the filter element body, impurities and solid particles filtered by the filter element will remain on the cavity wall. This needs to be cleaned before replacing the replaceable filter element assembly, which is cumbersome and easily contaminates the filter element. Utility Model Content

[0003] The main purpose of the utility model is to provide a composite filter element and water purification equipment, aiming to solve the technical problem that after the replaceable filter element assembly is removed from the filter cavity of the composite filter element, impurities and solid particles filtered by the filter element will remain on the cavity wall.

[0004] To achieve the above-mentioned objectives, the present invention proposes a composite filter element, which comprises a filter bottle, a filter bottle cover, a separator cylinder, a reverse osmosis filter assembly and a replaceable filter element assembly; the filter bottle cover is provided to cover the filter bottle; the separator cylinder is arranged in the filter bottle and forms a first filter cavity and a second filter cavity that are isolated from each other; the reverse osmosis filter assembly comprises a reverse osmosis filter element sleeved on the separator cylinder, the reverse osmosis filter element is arranged in the first filter cavity; the replaceable filter element assembly is detachably arranged in the second filter cavity; the replaceable filter element assembly comprises a housing and a filter element assembly, the filter element assembly is arranged in the housing, the housing is provided with a rear water inlet and a rear water outlet respectively located at both ends of the housing in the longitudinal direction, the rear water inlet and the rear water outlet are both connected to the filter element assembly; wherein the separator cylinder is also provided with a reverse osmosis water outlet connected to the second filter cavity, the reverse osmosis water outlet is connected to the pure water outlet side of the reverse osmosis filter element, and the reverse osmosis water outlet and the rear water inlet are plugged and connected.

[0005] In one embodiment, the filter element assembly includes a post-filter element, which is arranged in the shell, and the water inlet side of the post-filter element is connected to the post-water inlet, and the water outlet side of the post-filter element is connected to the post-water outlet.

[0006] In one embodiment, the replaceable filter element assembly also includes a partition arranged in the shell, the partition includes a middle partition and a central tube, the middle partition is connected to the outer wall of the central tube, and the middle partition is sealed to the shell; the partition plate and the shell form a first cavity and a second cavity that are isolated from each other, the post-filter element is arranged in the second cavity, and is sleeved on the central tube.

[0007] In one embodiment, the filter element assembly also includes a pre-filter element, which is arranged in the first cavity and is sleeved with the center tube. The shell is also provided with a pre-water inlet and a pre-water outlet. The pre-water inlet and the pre-water outlet are both arranged on the side of the shell away from the rear water inlet. The pre-water inlet is connected to the water inlet side of the pre-filter element, and the pre-water outlet is connected to the water outlet side of the pre-filter element.

[0008] In one embodiment, the central tube is formed with a pure water flow channel, one end of the pure water flow channel is connected to the rear water inlet through the second cavity, and the other end of the pure water flow channel is connected to the rear water outlet.

[0009] In one embodiment, the central tube includes a first tube portion and a second tube portion located on opposite sides of the middle partition, the front filter element is sleeved on the first tube portion, and the rear filter element is sleeved on the second tube portion, and the wall thickness of the first tube portion is not less than the wall thickness of the second tube portion.

[0010] In one embodiment, the wall thickness of the first tube portion is in the range of 1.5 mm to 4 mm, and / or the wall thickness of the second tube portion is in the range of 1.5 mm to 3 mm.

[0011] In one embodiment, a first mounting groove is provided on the side of the middle partition facing the first cavity, and the replaceable filter element assembly also includes an upper end cover, the upper end cover is provided with an upper card slot, and the two ends of the pre-filter element are respectively arranged in the first mounting groove and the upper card slot.

[0012] In one embodiment, the water inlet side of the pre-filter element is connected to the pre-water inlet, the water outlet side of the pre-filter element is connected to the pre-water outlet, and both ends of the pre-filter element are glued to the first mounting groove and the upper clamping groove respectively.

[0013] In one embodiment, a second mounting groove is provided on the side of the middle partition facing the second cavity, and the replaceable filter element assembly also includes a lower end cover, and the lower end cover is provided with a lower card slot, and the two ends of the post-filter element are respectively arranged in the second mounting groove and the lower card slot.

[0014] In one embodiment, the water inlet side of the post filter element is connected to the post water inlet, the water outlet side of the post filter element is connected to the pure water flow channel, and both ends of the post filter element are glued to the second mounting groove and the lower card groove respectively.

[0015] In one embodiment, a water outlet is provided at an end of the central tube close to the rear water inlet, and the water outlet side of the rear filter element is connected to the pure water flow channel through the water outlet.

[0016] In one embodiment, the lower end cover is provided with a raised portion, the central tube is sleeved with the raised portion, and a gap is provided between the raised portion and the central tube.

[0017] In one embodiment, in the axial direction of the central pipe, the height of the protrusion is higher than the height of the water outlet.

[0018] In one embodiment, a slot is provided at the bottom of the separation cylinder, and the slot forms the reverse osmosis water outlet. A plug-in portion is provided at one end of the shell, and the plug-in portion forms the rear water inlet. The plug-in portion and the slot are plugged in and matched to connect the reverse osmosis water outlet and the rear water inlet.

[0019] In one embodiment, the separation cylinder is provided with a water flow channel, the water flow channel is communicated with the first filter chamber, the slot is communicated with the water flow channel, the water flow channel extends radially along the separation cylinder and passes through the separation cylinder, and the slot extends axially along the separation cylinder and forms the reverse osmosis water outlet.

[0020] In one embodiment, the water flow channel is provided at an end of the separation cylinder away from the wastewater outlet.

[0021] The present invention also provides a water purification device, comprising the composite filter element. The composite filter element comprises a filter bottle, a filter bottle cover, a separator cylinder, a reverse osmosis filter assembly, and a replaceable filter element assembly; the filter bottle cover covers the filter bottle; the separator cylinder is disposed within the filter bottle and forms a first filter cavity and a second filter cavity that are isolated from each other; the reverse osmosis filter assembly comprises a reverse osmosis filter element sleeved within the separator cylinder, the reverse osmosis filter element disposed within the first filter cavity; the replaceable filter element assembly is detachably disposed within the second filter cavity; the replaceable filter element assembly comprises a housing and a filter element assembly, the filter element assembly being disposed within the housing, the housing being provided with a rear water inlet and a rear water outlet located at opposite ends of the housing in a longitudinal direction, the rear water inlet and the rear water outlet both being connected to the filter element assembly; the separator cylinder further comprising a reverse osmosis outlet connected to the second filter cavity, the reverse osmosis outlet being connected to the pure water outlet side of the reverse osmosis filter element, and the reverse osmosis outlet and the rear water inlet being connected by plugging.

[0022] The technical solution of the present invention is to set the replaceable filter element assembly as an independent detachable part, which has a shell and a rear water inlet and a rear water outlet at both ends of the shell. A filter element assembly is arranged in the shell to filter the water flowing into the shell. When the replaceable filter element assembly is installed in the second filter chamber in the filter bottle, the reverse osmosis water outlet and the rear water inlet are plugged in to realize water conduction, and the water flow will not flow in the second filter chamber. Then, when the replaceable filter element assembly is removed from the second filter chamber, impurities, solid particles, etc. generated by the composite filter element during operation will not remain on the cavity wall of the second filter chamber, so there is no need to clean the cavity wall of the second filter chamber (that is, the inner wall surface of the separation cylinder), and the reverse osmosis filter element will not be contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of an embodiment of a composite filter element provided by the present utility model;

[0025] Figure 2 for Figure 1 Cross-sectional view of the composite filter element;

[0026] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0027] Figure 4 for Figure 1 Exploded view of the medium composite filter element;

[0028] Figure 5 for Figure 4 Cross-sectional view of the composite filter element in exploded state.

[0029] Figure 6 This is a structural schematic diagram of an embodiment of a replaceable filter element assembly provided by the present utility model;

[0030] Figure 7 for Figure 6 A cross-sectional view of a replaceable filter element assembly;

[0031] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0032] Figure 9 for Figure 7 A partial enlarged view of point C in the middle;

[0033] Figure 10 for Figure 7 Schematic diagram of the structure of the middle separator;

[0034] Figure 11 for Figure 10 Cross-sectional view of the middle separator.

[0035] Description of Figure Numbers:

[0036] 1. Composite filter element;

[0037] 10. Replaceable filter element assembly; 20. Filter bottle; 30. Filter bottle cap; 31. Reverse osmosis water inlet; 32. Wastewater outlet; 33. Mounting port; 40. Separator cylinder; 41. First filter chamber; 42. Second filter chamber; 43. Reverse osmosis water outlet; 44. Water flow channel; 50. Reverse osmosis filter assembly; 51. Reverse osmosis filter element;

[0038] 100, housing; 110, front water inlet; 120, front water outlet; 130, rear water inlet; 140, rear water outlet;

[0039] 200, separator; 210, middle partition; 211, first mounting groove; 212, second mounting groove; 213, sealing groove; 220, center tube; 220a, pure water flow channel; 221, first tube portion; 222, second tube portion; 223, water outlet;

[0040] 310, first cavity; 320, second cavity;

[0041] 400, filter element assembly; 410, pre-filter element; 420, post-filter element;

[0042] 510, upper end cover; 511, upper slot; 520, lower end cover; 521, lower slot; 522, raised portion;

[0043] 600. Seals.

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] In the related art, the integrated composite filter element of the water purification equipment includes a filter element body and a replaceable filter element assembly. The filter element body is integrated with a reverse osmosis filter element, and the replaceable filter element assembly is integrated with a post-filter element or a pre- and post-filter element. The replaceable filter element assembly is removable relative to the filter element body for easy replacement. However, because the reverse osmosis filter element and the post-filter element are directly connected through a water hole opened in the cavity wall, after the replaceable filter element assembly is removed from the cavity of the filter element body, impurities and solid particles filtered by the filter element will remain on the cavity wall. This needs to be cleaned before replacing the replaceable filter element assembly, which is cumbersome and easily contaminates the filter element.

[0049] The utility model provides a composite filter element, which is applied to a water purification device, wherein the water purification device is a water purifier, a water dispenser or a pure water machine.

[0050] See also Figures 1 to 3In one embodiment of the present invention, the composite filter element 1 includes a filter bottle 20, a filter bottle cover 30, a separator cylinder 40, a reverse osmosis filter assembly 50 and a replaceable filter element assembly 10; the filter bottle cover 30 covers the filter bottle 20, and the filter bottle cover 30 is provided with a reverse osmosis water inlet 31, a wastewater outlet 32 ​​and an installation port 33; the separator cylinder 40 is arranged in the filter bottle 20 and forms a first filter cavity 41 and a second filter cavity 42 that are isolated from each other, the first filter cavity 41 is located at the outer periphery of the second filter cavity 42, and the second filter cavity 42 is arranged corresponding to the installation port 33; the reverse osmosis filter assembly 50 includes a reverse osmosis filter element 51 sleeved on the separator cylinder 40, the reverse osmosis filter element 51 is arranged in the first filter cavity 41, the raw water inlet side of the reverse osmosis filter element 51 is connected to the reverse osmosis water inlet 31, and the reverse osmosis filter element 51 is provided with a reverse osmosis water inlet 31. The wastewater outlet side of the filter element 51 is connected to the wastewater port 32; the replaceable filter element assembly 10 is detachably arranged in the second filter chamber 42 through the installation port 33; the replaceable filter element assembly 10 includes a shell 100 and a filter element assembly 400, the filter element assembly 400 is arranged in the shell 100, and the shell 100 is provided with a rear water inlet 130 and a rear water outlet 140 respectively located at both ends of the length direction of the shell 100, and the rear water inlet 130 and the rear water outlet 140 are both connected to the filter element assembly 400; wherein, the bottom of the separation cylinder 40 is also provided with a reverse osmosis outlet 43 connected to the second filter chamber 42, the reverse osmosis outlet 43 is connected to the pure water outlet side of the reverse osmosis filter element 51, and the reverse osmosis outlet 43 and the rear water inlet 130 are plugged and connected.

[0051] See also Figure 2Specifically, the filter bottle 20 has an installation cavity for mounting a separator cylinder 40, a reverse osmosis filter assembly 50, and a replaceable filter element assembly 10. The filter bottle 20 has a circular cross-section, which matches the shape of the annular cylindrical reverse osmosis filter assembly 50. At least one end of the filter bottle 20 is open, allowing the separator cylinder 40, reverse osmosis filter assembly 50, and replaceable filter element assembly 10 to be installed within the installation cavity. The filter bottle cap 30 covers the open end of the filter bottle 20 and is sealed to the filter bottle 20. The reverse osmosis water inlet 31 and wastewater port 32 on the filter bottle cap 30 are respectively connected to the corresponding water inlet and water outlet of the reverse osmosis filter element 51 of the reverse osmosis filter assembly 50. After the separator cylinder 40 is installed in the filter bottle 20, it divides the internal space of the filter bottle 20 into a first filter chamber 41 and a second filter chamber 42. The first filter chamber 41 is located in the second filter chamber 42. The first filter chamber 41 is generally an annular cylindrical chamber. The reverse osmosis filter assembly 50 is disposed in the first filter chamber 41, and the two have matching shapes. The second filter chamber 42 is generally a cylindrical chamber. The replaceable filter element assembly 10 is disposed in the second filter chamber 42 and can be removed from the second filter chamber 42 through the installation port 33 on the filter bottle cover 30, facilitating the replacement of the replaceable filter element assembly 10. The main function of the installation port 33 is to provide clearance for the replaceable filter element assembly 10 during the disassembly and installation process.

[0052] See also Figure 5 The replaceable filter cartridge assembly 10 includes a housing 100 and a filter cartridge assembly 400. The filter cartridge assembly 400 is disposed within the housing 100. A rear water inlet 130 and a rear water outlet 140 are provided at both ends of the housing 100 in the longitudinal direction, respectively, and are connected to the filter cartridge assembly 400. The rear water inlet 130 is used to allow water to flow in and be filtered by the filter cartridge assembly 400, and the rear water outlet 140 is used to allow water filtered by the filter cartridge assembly 400 to flow out. Furthermore, a reverse osmosis water outlet 43 is provided at the bottom of the separation cylinder 40, which is connected to the second filter chamber 42. In other words, the purified water produced after filtration by the reverse osmosis filtration assembly 50 will flow out through the reverse osmosis water outlet 43. The reverse osmosis water outlet 43 and the rear water inlet 130 are plugged and connected, meaning that the purified water flowing out of the reverse osmosis water outlet 43 will flow through the rear water inlet 130 into the housing 100 of the replaceable filter cartridge assembly 10 for filtration.

[0053] To sum up, when the composite filter element 1 is working, the water flowing into the filter bottle 20 through the reverse osmosis water inlet 31 is filtered by the reverse osmosis filter element 51 and is divided into two paths, one is pure water and the other is waste water. The waste water is discharged from the wastewater port 32, and the pure water flows to the reverse osmosis water outlet 43, and flows into the housing 100 of the replaceable filter element assembly 10 through the rear water inlet 130 connected to it, and then flows out from the rear water outlet 140 for user use after being filtered by the filter element assembly 400. That is to say, during the process of filtering water by the entire composite filter element 1, the water flow only flows in the first filter chamber 41 when the reverse osmosis filter element 51 is filtering, and the water flow only flows in the shell 100 of the replaceable filter element assembly 10 when the filter element assembly 400 is filtering. The water path between the two is connected only through the connection between the reverse osmosis water outlet 43 and the rear water inlet 130. The water flow will not flow in the second filter chamber 42. After the replaceable filter element assembly 10 is removed from the second filter chamber 42, the wall of the second filter chamber 42 will not contain impurities, solid particles, etc. generated by the composite filter element 1 during operation. There is no need to clean the wall of the second filter chamber 42 (that is, the inner wall surface of the separation cylinder 40), and the reverse osmosis filter element 51 will not be contaminated.

[0054] The technical solution of the present invention is to set the replaceable filter element assembly 10 as an independent detachable part, which has a shell 100 and a rear water inlet 130 and a rear water outlet 140 at both ends of the shell 100. A filter element assembly 400 is provided in the shell 100 for filtering the water flowing into the shell 100. When the replaceable filter element assembly 10 is installed in the second filter chamber 42 in the filter bottle 20, the reverse osmosis water outlet 43 and the rear water inlet 130 are plugged in to realize water conduction, and the water flow will not flow in the second filter chamber 42. Then, when the replaceable filter element assembly 10 is removed from the second filter chamber 42, impurities, solid particles, etc. generated by the composite filter element 1 during operation will not remain on the wall of the second filter chamber 42, so there is no need to clean the wall of the second filter chamber 42 (that is, the inner wall surface of the separation cylinder 40), and the reverse osmosis filter element 51 will not be contaminated.

[0055] See also Figures 3 to 5 In one embodiment, a slot is provided at the bottom of the separation cylinder 40, and the slot forms the reverse osmosis water outlet 43. A plug-in portion is provided at one end of the shell 100, and the plug-in portion forms the rear water inlet 130. The plug-in portion and the slot are plugged into each other so that the reverse osmosis water outlet 43 and the rear water inlet 130 are connected.

[0056] Specifically, a slot is provided at the bottom of the separation cylinder 40, and the slot is formed by an outward protrusion of the bottom of the separation cylinder 40, and the slot forms a reverse osmosis water outlet 43. Matching therewith, a plug-in portion for inserting into the slot is provided on the housing 100, and the plug-in portion forms a rear water inlet 130. When the two are plugged in, the water path inside the first filter cavity 41 of the filter bottle 20 and the inner chamber of the housing 100 of the replaceable filter element assembly 10 are connected. Of course, in other embodiments, the plug-in portion may be provided at the bottom of the separation cylinder 40, and the slot may be provided on the housing 100. The two may be plugged in to each other to achieve water path connection between the first filter cavity 41 of the filter bottle 20 and the inner chamber of the housing 100 of the replaceable filter element assembly 10. There is no specific limitation on this.

[0057] See also Figure 2 and Figure 3 In one embodiment, the separation cylinder 40 is provided with a water flow channel 44, the water flow channel 44 is communicated with the first filter chamber 41, the slot is communicated with the water flow channel 44, the water flow channel 44 extends along the radial direction of the separation cylinder 40 and passes through the separation cylinder 40, and the slot extends along the axial direction of the separation cylinder 40 and forms the reverse osmosis water outlet 43.

[0058] Specifically, since the separator cylinder 40 separates the interior of the filter bottle 20 into a first filter chamber 41 and a second filter chamber 42, and the first filter chamber 41 is located on the periphery of the second filter chamber 42, and the replaceable filter element assembly 10 is detachably disposed in the second filter chamber 42, the separator cylinder 40 is also provided with a water flow channel 44, which connects the first filter chamber 41 and the reverse osmosis water outlet 43 (formed in the slot) through the water flow channel 44. In addition, the water flow channel 44 extends radially along the separator cylinder 40 and penetrates the separator cylinder 40, so that both sides of the separator cylinder 40 can be used to allow pure water filtered by the reverse osmosis filter element 51 to flow into the water flow channel 44, flow to the reverse osmosis water outlet 43, and finally flow into the housing 100 of the replaceable filter element assembly 10.

[0059] It should be noted that, because the first filter cavity 41 needs to be relatively isolated from the water path within the housing 100, the water passage 44 is configured to penetrate the separation cylinder 40 rather than being provided on the wall of the separation cylinder 40. Specifically, the water passage 44 is provided at the end of the separation cylinder 40 away from the wastewater outlet 32, closer to the rear water inlet 130 of the replaceable filter element assembly 10.

[0060] See also Figure 2 and Figure 5In one embodiment, the filter element assembly 400 includes a post-filter element 420, which is disposed in the housing 100, and the water inlet side of the post-filter element 420 is connected to the post-water inlet 130, and the water outlet side of the post-filter element 420 is connected to the post-water outlet 140.

[0061] Specifically, the filter element assembly 400 can be configured only as a post-filter element 420. The post-filter element 420 can further purify the water quality and remove residual impurities in the water. That is, the post-filter element 420 can further remove tiny impurities, odors, and discolorations that may remain in the water after being treated by the pre-filter element 410 and the main filter element (such as an RO reverse osmosis membrane). These impurities may include tiny suspended matter, organic compounds, etc. The post-filter element 420, especially the activated carbon filter element, can effectively absorb odors and residual chlorine in the water, making the treated water taste more refreshing and sweet. This is particularly important for improving the quality of drinking water. In some cases, water treated by an RO reverse osmosis membrane may exhibit a certain alkalinity. Certain components in the post-filter element 420 (such as certain minerals) can help adjust the water quality to a pH closer to neutral or suitable for drinking. Some post-filter elements 420 are also designed to increase the mineral content of water to meet the needs of specific groups of people for mineral water. Furthermore, further purification by post-filter 420 can reduce impurities and substances in the water that are harmful to subsequent equipment (such as water dispensers, electric kettles, etc.), thereby extending the service life of these equipment. Due to the presence of post-filter 420, the frequency of cleaning and maintenance of subsequent equipment is also reduced accordingly, thereby reducing the costs incurred due to equipment failure or maintenance.

[0062] See also Figure 6 and Figure 7 In one embodiment, the replaceable filter element assembly 10 further includes a separator 200 disposed within the housing 100. The separator 200 includes a middle partition 210 and a central tube 220. The middle partition 210 is connected to the outer wall of the central tube 220 and is sealed to the housing 100. The separator and the housing 100 form a first cavity 310 and a second cavity 320, which are isolated from each other. The post-filter element 420 is disposed in the second cavity 320 and is sleeved around the central tube 220. Specifically, the first cavity 310 is located away from the reverse osmosis water outlet 43, and the second cavity 320 is located closer to the reverse osmosis water outlet 43.

[0063] Furthermore, the filter element assembly 400 also includes a pre-filter element 410, which is arranged in the first cavity 310 and is sleeved with the center tube 220. The shell 100 is also provided with a pre-water inlet 110 and a pre-water outlet 120. The pre-water inlet 110 and the pre-water outlet 120 are both arranged on the side of the shell 100 away from the rear water inlet 130. The pre-water inlet 110 is connected to the water inlet side of the pre-filter element 410, and the pre-water outlet 120 is connected to the water outlet side of the pre-filter element 410.

[0064] Specifically, the filter element assembly 400 can include a pre-filter element 410 and a post-filter element 420 at the same time. The pre-filter element 410 can filter large particles of impurities in the water, effectively removing large particles of impurities such as mud, rust, insect eggs, and suspended matter in the water, ensuring that the water quality entering the home is initially purified. If these impurities directly enter household water pipes, faucets, washing machines, water heaters and other equipment, they can easily cause blockage and wear. The use of the pre-filter element 410 can effectively protect these devices from damage. Through the preliminary filtration of the pre-filter element 410, the filtration burden of subsequent water purification equipment (such as water purifiers, water purifiers, etc.) can be greatly reduced, thereby extending the service life of these equipment. Due to the presence of the pre-filter element 410, the frequency of filter element replacement of subsequent water purification equipment will also be reduced accordingly, thereby reducing the costs incurred by frequent filter element replacement. In addition, the pre-filter element 410 can also improve water quality. After being filtered by the pre-filter element 410, the impurity content of the water is greatly reduced, and the water quality is significantly improved. This not only makes daily water use for washing, gargling, and laundry more comfortable and healthy, but also provides a better foundation for subsequent water treatment processes. At the same time, the pre-filter 410 can reduce water turbidity and the likelihood of bacterial growth, thereby effectively reducing secondary contamination in pipes, water tanks, and other areas. Some pre-filters 410 also have scale inhibition capabilities. For example, using a scale inhibition filter containing hydrochloric acid and phosphorus can reduce scale formation inside equipment such as solar energy equipment and water boilers.

[0065] See also Figure 7 、 Figure 10 and Figure 11 It should be noted that the partition 200 includes a middle partition plate 210 and a central tube 220. The central tube 220 is configured as a hollow tube with a certain length, and a pure water flow channel 220a is formed inside it. Through the setting of the pure water flow channel 220a in the central tube 220, the rear water inlet 130 and the rear water inlet 130 can be connected and isolated from the first cavity 310, without affecting the water flow of the pre-filter element 410.

[0066] Furthermore, the middle partition 210 is arranged in a plate shape, and the outer wall surface of the middle partition 210 and the central tube 220 are connected together. The connection relationship between the central tube 220 and the middle partition 210 can be connected together by hot melt welding, clamping or other connection methods. In this embodiment, the central tube 220 and the middle partition 210 are integrally formed. The integral forming avoids the welding or connection between components in traditional manufacturing, thereby eliminating seams and potential weaknesses. This helps to improve the strength and durability of the overall structure, because seams are often the most vulnerable places for components to be damaged. Through integral forming, the material maintains continuity inside the component, which helps to better transfer and disperse stress, thereby improving the overall fatigue resistance and fracture resistance. In addition, integral forming can usually be completed in a single processing process, reducing the need for multiple processes (such as cutting, welding, grinding, etc.) in traditional manufacturing. This not only saves time and improves production efficiency, but also reduces production costs. Integral forming technology is often combined with automated production equipment to further improve production efficiency and consistency. Furthermore, through precise molds and processing equipment, one-piece molding ensures the accuracy of component size and shape, improving the overall appearance quality of the product. One-piece molding also offers significant advantages in reducing costs. On the one hand, it reduces material waste caused by cutting and scrapping, lowering raw material costs. On the other hand, by reducing the number of steps and increasing the degree of automation, one-piece molding also reduces reliance on manual labor and labor costs.

[0067] See also Figures 7 to 9 The aforementioned middle partition 210 is sealedly connected to the housing 100, which means that the middle partition 210 is in sealed contact with the inner wall of the housing 100 to separate the chamber within the housing 100 into a first cavity 310 and a second cavity 320 that are isolated from each other. The first cavity 310 and the second cavity 320 are arranged in the longitudinal direction of the housing 100. The longitudinal direction of the housing 100 can be defined as the vertical direction, that is, the pre-filter element 410 and the post-filter element 420 are arranged in the vertical direction. The volume of the pre-filter element 410 is larger than that of the post-filter element 420, and the length of the pre-filter element 410 is longer than that of the post-filter element 420, so as to ensure the filtering effect of the pre-filter element 410 and the post-filter element 420. Since the pre-filter element 410 is used to filter out most of the impurities in the raw water, the overall volume of the pre-filter element 410 needs to be set larger, and the water passing through the post-filter element 420 has been filtered twice by the pre-filter element 410 and the reverse osmosis filter element 51, and the solute content in the water is already very small, so the overall volume of the post-filter element 420 can be set relatively smaller. Therefore, arranging the pre-filter element 410 and the post-filter element 420 in the up and down direction can ensure the filtering effect of the pre-filter element 410 and the post-filter element 420.

[0068] See also Figure 10 and Figure 11In one embodiment, the central tube 220 includes a first tube portion 221 and a second tube portion 222 located on opposite sides of the middle partition 210. The pre-filter element 410 is sleeved with the first tube portion 221, and the post-filter element 420 is sleeved with the second tube portion 222. The wall thickness of the first tube portion 221 is not less than the wall thickness of the second tube portion 222. Specifically, the first tube portion 221 and the second tube portion 222 are arranged on opposite sides of the middle partition 210. Since it is necessary to ensure the isolation of the first cavity 310 and the second cavity 320, the pre-filter element 410 is sleeved with the first tube portion 221. The first tube portion 221 and the second tube portion 222 are coaxially arranged and communicate with the internal pure water flow channel 220a. The end of the first tube portion 221 away from the middle partition 210 is directly and sealedly connected to the post-water outlet 140 to ensure that the pure water flow channel 220a connected to the water outlet side of the post-filter element 420 is isolated from the water outlet side of the pre-filter element 410. Similarly, the post-filter element 420 is sleeved with the second tube portion 222. The arrangement of the first tube portion 221 and the second tube portion 222 both provide a certain degree of support for the pre-filter element 410 and the post-filter element 420, preventing the pre-filter element 410 and the post-filter element 420 from deforming during use. Since the first tube portion 221 and the second tube portion 222 are subject to the force of the pressure difference within the housing 100, the wall thickness of the first tube portion 221 is not less than the wall thickness of the second tube portion 222. Preferably, the wall thickness of the first tube portion 221 is set to be greater than the wall thickness of the second tube portion 222. On the one hand, this can provide better support for the longer pre-filter element 410. On the other hand, the thicker first tube portion 221 can prevent the pressure imbalance between the inside and outside of the first tube portion 221, which may cause the first tube portion 221 to be crushed or damaged.

[0069] In one embodiment, the wall thickness of the first tube portion 221 ranges from 1.5 mm to 4 mm, and / or the wall thickness of the second tube portion 222 ranges from 1.5 mm to 3 mm. Specifically, in this embodiment, the wall thickness of the first tube portion 221 may range from 1.5 mm to 4 mm, or the wall thickness of the second tube portion 222 may range from 1.5 mm to 3 mm. Alternatively, the wall thickness of the first tube portion 221 may range from 1.5 mm to 4 mm, and the wall thickness of the second tube portion 222 may range from 1.5 mm to 3 mm. It should be noted that the wall thickness of the first tube portion 221 should always be no less than the wall thickness of the second tube portion 222. The wall thickness of the first tube portion 221 is exemplarily 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, and 4 mm, and the wall thickness of the second tube portion 222 is exemplarily 1.5 mm, 2 mm, 2.5 mm, and 3 mm. Considering the tolerances of the center tube 220 during actual production, the wall thicknesses of the first tube portion 221 and the second tube portion 222 are approximate values ​​with a tolerance within ±0.2 mm.

[0070] In one embodiment, the thickness of the middle diaphragm 210 is greater than the thickness of the first tube portion 221, and / or the thickness of the middle diaphragm 210 ranges from 3 mm to 7 mm. Specifically, due to the large pressure difference between the first cavity 310 and the second cavity 320, the pressure in the two cavities will be concentrated on the middle diaphragm 210. Therefore, the middle diaphragm 210 needs to be thicker. At the same time, the thicker middle diaphragm 210 also facilitates the formation of a sealing groove 213 on the outer periphery of the middle diaphragm 210 and the installation of a sealing member 600 to achieve a seal with the housing 100. Regarding the thickness of the middle diaphragm 210, first, the thickness of the middle diaphragm 210 can be set to be greater than the thickness of the first tube portion 221. Second, the thickness of the middle diaphragm 210 can be limited to between 3mm and 7mm, that is, greater than or equal to 3mm and less than or equal to 7mm. Exemplary thicknesses of the middle diaphragm 210 can be 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, and 7mm. Considering the tolerances of the center tube 220 in actual production, the specific thickness of the middle diaphragm 210 is an approximate value with a tolerance within ±0.2mm. Third, on the premise that the thickness of the middle diaphragm 210 is greater than that of the first tube portion 221, its thickness range can be limited to between 3mm and 7mm.

[0071] See also Figure 7 and Figure 8In one embodiment, a first mounting groove 211 is provided on the side of the middle partition 210 facing the first cavity 310. The replaceable filter element assembly 10 further includes an upper end cap 510 having an upper retaining groove 511. The two ends of the pre-filter element 410 are respectively disposed in the first mounting groove 211 and the upper retaining groove 511. Specifically, to secure the pre-filter element 410, a first mounting groove 211 is provided on the side of the middle partition 210 facing the first cavity 310. One end of the pre-filter element 410 is placed in the first mounting groove 211. The other end of the pre-filter element 410 is connected and secured to the upper end cap 510, which is also provided with an upper retaining groove 511. The upper retaining groove 511 secures the other end of the pre-filter element 410. In this way, by securing the two ends of the pre-filter element 410, the entire pre-filter element 410 is secured and secured, preventing it from moving or being damaged during use. The first installation groove 211 is formed between a peripheral edge protruding from the middle partition plate 210 toward the first cavity 310 and an outer wall surface of the first tube body.

[0072] Furthermore, the water inlet side of the pre-filter element 410 is connected to the pre-water inlet 110, the water outlet side of the pre-filter element 410 is connected to the pre-water outlet 120, and the two ends of the pre-filter element 410 are respectively glued to the first mounting groove 211 and the upper clamping groove 511, so as to prevent the pre-filter element 410 from being deformed and dislocated by the impact of water pressure, thereby further extending the service life of the pre-filter element 410.

[0073] See also Figure 7 and Figure 9 In one embodiment, a second mounting groove 212 is provided on the side of the middle partition 210 facing the second cavity 320. The replaceable filter element assembly 10 further includes a lower end cap 520 having a lower retaining groove 521. The two ends of the post-filter element 420 are respectively disposed in the second mounting groove 212 and the lower retaining groove 521. Specifically, to secure the post-filter element 420, a second mounting groove 212 is provided on the side of the middle partition 210 facing the second cavity 320. One end of the post-filter element 420 is placed in the second mounting groove 212. The other end of the post-filter element 420 is connected and secured to the lower end cap 520 having a lower retaining groove 521. By securing the two ends of the post-filter element 420, the entire post-filter element 420 is secured and secured, preventing it from moving or being damaged during use. The second mounting groove 212 is formed between a peripheral edge protruding from the middle partition plate 210 toward the second cavity 320 and an outer wall surface of the second tube body.

[0074] Furthermore, the water inlet side of the rear filter element 420 is connected to the rear water inlet 130, the water outlet side of the rear filter element 420 is connected to the pure water flow channel 220a, and the two ends of the rear filter element 420 are respectively glued to the second mounting groove 212 and the lower card groove 521, so as to prevent the rear filter element 420 from being deformed and dislocated by the impact of water pressure, thereby further extending the service life of the rear filter element 420.

[0075] See also Figures 9 to 11 In one embodiment, a water outlet 223 is defined at the end of the central tube 220 near the rear water inlet 130. The outlet of the rear filter element 420 communicates with the pure water flow channel 220a through the water outlet 223. Specifically, the outlet of the rear filter element 420 communicates with the pure water flow channel 220a through the water outlet 223. The water outlet 223 is a notch defined at the end of the central tube 220 to facilitate water flow. Multiple water outlets 223 may be provided, spaced apart along the circumference of the central tube 220. Since the water outlet 223 is opened at the end of the central tube 220 close to the rear water inlet 130, the tube wall portion of the central tube 220 guides the water flow in the second cavity 320 and supports the rear filter element 420. The tube wall portion of the central tube 220 guides the pure water filtered by the rear filter element 420 to the water outlet 223. The water flow path in the second cavity 320 is reasonable and can maintain a relative balance with the water flow in the first cavity 310 in the force acting on the central partition 210.

[0076] See also Figure 9 In one embodiment, the lower end cap 520 is provided with a raised portion 522, and the central tube 220 is sleeved with the raised portion 522, with a gap between the raised portion 522 and the central tube 220. Specifically, the raised portion 522 is sleeved on the end of the central tube 220, and the raised portion 522 can play a certain limiting role on the end of the central tube 220, preventing the central tube 220 from moving when subjected to the impact force of the water flow due to the lack of a limit structure at the end of the central tube 220. At the same time, there is a gap between the raised portion 522 and the central tube 220, which is used to allow the pure water filtered by the post-filter element 420 to flow through. The pure water flowing out of the water outlet side of the post-filter element 420 will flow through the water outlet 223, the gap between the raised portion 522 and the central tube 220, and into the pure water flow channel 220a, and finally flow out from the post-water outlet 140 for use by the user.

[0077] See also Figure 9In one embodiment, the height of the raised portion 522 is higher than the height of the water outlet 223 in the axial direction of the central tube 220. This arrangement further ensures the stability of the restraining relationship between the central tube 220 and the raised portion 522, preventing the central tube 220 from easily falling out of the raised portion 522. It also prevents the purified water passing through the water outlet 223 from flowing directly into the purified water flow channel 220a through the water outlet 223, thereby affecting the balance of forces generated by the water flow within the second chamber 320.

[0078] See also Figures 9 to 11 In one embodiment, the middle diaphragm 210 is provided with a sealing groove 213, in which a sealing member 600 is disposed. The middle diaphragm 210 and the housing 100 are sealed together via the sealing member 600. In other words, to ensure the effectiveness and tightness of the sealing connection between the middle diaphragm 210 and the housing 100, a sealing groove 213 is further formed on the surface of the middle diaphragm 210 that mates with the inner wall of the housing 100. The sealing member 600 is disposed in the sealing groove 213, thereby ensuring a sealed connection between the middle diaphragm 210 and the housing 100. The sealing member 600 is a sealing ring. As for the type of sealing ring, there is no specific limitation. It only needs to ensure a relative seal between the housing 100 and the middle diaphragm 210.

[0079] The present invention also provides a water purification device, which includes the aforementioned composite filter element. The specific structure of the composite filter element is referred to in the above-mentioned embodiments. Since the present water purification device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. The water purification device is a water purifier, a water dispenser, or a water purifier.

[0080] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A composite filter element, characterized in that: include: filter bottles; A filter bottle cover, used to cover the filter bottle; A separation cylinder is disposed in the filter bottle and forms a first filter cavity and a second filter cavity that are isolated from each other; A reverse osmosis filter assembly, comprising a reverse osmosis filter element sleeved on the separation cylinder, wherein the reverse osmosis filter element is arranged in the first filter cavity; as well as A replaceable filter element assembly is detachably disposed in the second filter cavity; the replaceable filter element assembly includes a housing and a filter element assembly, the filter element assembly is disposed within the housing, the housing is provided with a rear water inlet and a rear water outlet respectively located at both ends of the housing in a longitudinal direction, the rear water inlet and the rear water outlet are both in communication with the filter element assembly; The separation cylinder is further provided with a reverse osmosis water outlet connected to the second filter chamber, the reverse osmosis water outlet is connected to the pure water outlet side of the reverse osmosis filter element, and the reverse osmosis water outlet is connected to the rear water inlet by plug connection.

2. The composite filter element according to claim 1, characterized in that: The filter element assembly includes a post-filter element, which is arranged in the shell, and the water inlet side of the post-filter element is connected to the post-water inlet, and the water outlet side of the post-filter element is connected to the post-water outlet.

3. The composite filter element according to claim 2, characterized in that: The replaceable filter element assembly also includes a partition arranged in the shell, the partition includes a middle partition and a central tube, the middle partition is connected to the outer wall of the central tube, and the middle partition is sealed to the shell; the partition and the shell form a first and second isolated cavities, the post-filter element is arranged in the second cavity, and is sleeved on the central tube.

4. The composite filter element according to claim 3, characterized in that: The filter element assembly also includes a pre-filter element, which is arranged in the first cavity and is sleeved with the central tube. The shell is also provided with a pre-water inlet and a pre-water outlet. The pre-water inlet and the pre-water outlet are both arranged on the side of the shell away from the rear water inlet. The pre-water inlet is connected to the water inlet side of the pre-filter element, and the pre-water outlet is connected to the water outlet side of the pre-filter element.

5. The composite filter element according to claim 4, characterized in that: The central tube is formed with a pure water flow channel, one end of the pure water flow channel is connected to the rear water inlet through the second cavity, and the other end is connected to the rear water outlet.

6. The composite filter element according to claim 5, characterized in that: The central tube includes a first tube portion and a second tube portion located on opposite sides of the middle partition, the front filter element is sleeved on the first tube portion, and the rear filter element is sleeved on the second tube portion, and the wall thickness of the first tube portion is not less than the wall thickness of the second tube portion.

7. The composite filter element according to claim 6, characterized in that: The wall thickness of the first tube portion is in the range of 1.5 mm to 4 mm, and / or the wall thickness of the second tube portion is in the range of 1.5 mm to 3 mm.

8. The composite filter element according to claim 4, wherein: The middle partition is provided with a first mounting groove on the side facing the first cavity. The replaceable filter element assembly also includes an upper end cover, and the upper end cover is provided with an upper clamping groove. The two ends of the pre-filter element are respectively arranged in the first mounting groove and the upper clamping groove.

9. The composite filter element according to claim 8, characterized in that: The water inlet side of the pre-filter element is connected to the pre-water inlet, the water outlet side of the pre-filter element is connected to the pre-water outlet, and both ends of the pre-filter element are glued to the first installation groove and the upper clamping groove respectively.

10. The composite filter element according to claim 5, characterized in that: The middle partition is provided with a second mounting groove on the side facing the second cavity. The replaceable filter element assembly also includes a lower end cover, and the lower end cover is provided with a lower card slot. The two ends of the post-filter element are respectively arranged in the second mounting groove and the lower card slot.

11. The composite filter element according to claim 10, wherein: The water inlet side of the rear filter element is connected to the rear water inlet, the water outlet side of the rear filter element is connected to the pure water flow channel, and both ends of the rear filter element are glued to the second installation groove and the lower card groove respectively.

12. The composite filter element according to claim 10, wherein: The end of the central tube close to the rear water inlet is provided with a water outlet, and the water outlet side of the rear filter element is connected with the pure water flow channel through the water outlet.

13. The composite filter element according to claim 12, wherein: The lower end cover is provided with a raised portion, the central tube is sleeved with the raised portion, and a gap is provided between the raised portion and the central tube.

14. The composite filter element according to claim 13, wherein: In the axial direction of the central pipe, the height of the protrusion is higher than the height of the water outlet.

15. The composite filter element according to any one of claims 1 to 14, characterized in that: A slot is provided at the bottom of the separation cylinder, which forms the reverse osmosis water outlet. A plug-in portion is provided at one end of the shell, which forms the rear water inlet. The plug-in portion and the slot are plugged into each other to connect the reverse osmosis water outlet and the rear water inlet.

16. The composite filter element according to claim 15, characterized in that: The separation cylinder is provided with a water flow channel, which is connected to the first filter chamber. The slot is connected to the water flow channel. The water flow channel extends radially along the separation cylinder and passes through the separation cylinder. The slot extends axially along the separation cylinder and forms the reverse osmosis water outlet.

17. The composite filter element according to claim 16, wherein: The water flow channel is arranged at one end of the separation cylinder away from the wastewater outlet.

18. A water purification device, characterized in that: Comprising the composite filter element according to any one of claims 1 to 17.

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